1f5166768STheodore Ts'o // SPDX-License-Identifier: GPL-2.0 2ac27a0ecSDave Kleikamp /* 3617ba13bSMingming Cao * linux/fs/ext4/super.c 4ac27a0ecSDave Kleikamp * 5ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 6ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 7ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 8ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 9ac27a0ecSDave Kleikamp * 10ac27a0ecSDave Kleikamp * from 11ac27a0ecSDave Kleikamp * 12ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 13ac27a0ecSDave Kleikamp * 14ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 15ac27a0ecSDave Kleikamp * 16ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 17ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 18ac27a0ecSDave Kleikamp */ 19ac27a0ecSDave Kleikamp 20ac27a0ecSDave Kleikamp #include <linux/module.h> 21ac27a0ecSDave Kleikamp #include <linux/string.h> 22ac27a0ecSDave Kleikamp #include <linux/fs.h> 23ac27a0ecSDave Kleikamp #include <linux/time.h> 24c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 2866114cadSTejun Heo #include <linux/backing-dev.h> 29ac27a0ecSDave Kleikamp #include <linux/parser.h> 30ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 31a5694255SChristoph Hellwig #include <linux/exportfs.h> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ef510424SDan Williams #include <linux/dax.h> 427abc52c2SDan Magenheimer #include <linux/cleancache.h> 437c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 44ee73f9a5SJeff Layton #include <linux/iversion.h> 45ac27a0ecSDave Kleikamp 46bfff6873SLukas Czerner #include <linux/kthread.h> 47bfff6873SLukas Czerner #include <linux/freezer.h> 48bfff6873SLukas Czerner 493dcf5451SChristoph Hellwig #include "ext4.h" 504a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 513dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 52ac27a0ecSDave Kleikamp #include "xattr.h" 53ac27a0ecSDave Kleikamp #include "acl.h" 543661d286STheodore Ts'o #include "mballoc.h" 550c9ec4beSDarrick J. Wong #include "fsmap.h" 56ac27a0ecSDave Kleikamp 579bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 589bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 599bffad1eSTheodore Ts'o 600b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 610b75a840SLukas Czerner static struct mutex ext4_li_mtx; 62e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 639f6200bbSTheodore Ts'o 64617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 65ac27a0ecSDave Kleikamp unsigned long journal_devnum); 662adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 67e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 68617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 69617ba13bSMingming Cao struct ext4_super_block *es); 70617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 71617ba13bSMingming Cao struct ext4_super_block *es); 72617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 73617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 74617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 75c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 76c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 77152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 78152a0836SAl Viro const char *dev_name, void *data); 792035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 802035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 81d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 82bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 83bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 848f1f7453SEric Sandeen static void ext4_clear_request_list(void); 85c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 86c6cb7e77SEric Whitney unsigned int journal_inum); 87ac27a0ecSDave Kleikamp 88e74031fdSJan Kara /* 89e74031fdSJan Kara * Lock ordering 90e74031fdSJan Kara * 91e74031fdSJan Kara * Note the difference between i_mmap_sem (EXT4_I(inode)->i_mmap_sem) and 92e74031fdSJan Kara * i_mmap_rwsem (inode->i_mmap_rwsem)! 93e74031fdSJan Kara * 94e74031fdSJan Kara * page fault path: 95e74031fdSJan Kara * mmap_sem -> sb_start_pagefault -> i_mmap_sem (r) -> transaction start -> 96e74031fdSJan Kara * page lock -> i_data_sem (rw) 97e74031fdSJan Kara * 98e74031fdSJan Kara * buffered write path: 99e74031fdSJan Kara * sb_start_write -> i_mutex -> mmap_sem 100e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 101e74031fdSJan Kara * i_data_sem (rw) 102e74031fdSJan Kara * 103e74031fdSJan Kara * truncate: 1041d39834fSNikolay Borisov * sb_start_write -> i_mutex -> i_mmap_sem (w) -> i_mmap_rwsem (w) -> page lock 1051d39834fSNikolay Borisov * sb_start_write -> i_mutex -> i_mmap_sem (w) -> transaction start -> 1061d39834fSNikolay Borisov * i_data_sem (rw) 107e74031fdSJan Kara * 108e74031fdSJan Kara * direct IO: 1091d39834fSNikolay Borisov * sb_start_write -> i_mutex -> mmap_sem 1101d39834fSNikolay Borisov * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) 111e74031fdSJan Kara * 112e74031fdSJan Kara * writepages: 113e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 114e74031fdSJan Kara */ 115e74031fdSJan Kara 116c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1172035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1182035e776STheodore Ts'o .owner = THIS_MODULE, 1192035e776STheodore Ts'o .name = "ext2", 1202035e776STheodore Ts'o .mount = ext4_mount, 1212035e776STheodore Ts'o .kill_sb = kill_block_super, 1222035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1232035e776STheodore Ts'o }; 1247f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 125fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1262035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 1272035e776STheodore Ts'o #else 1282035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1292035e776STheodore Ts'o #endif 1302035e776STheodore Ts'o 1312035e776STheodore Ts'o 132ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 133ba69f9abSJan Kara .owner = THIS_MODULE, 134ba69f9abSJan Kara .name = "ext3", 135152a0836SAl Viro .mount = ext4_mount, 136ba69f9abSJan Kara .kill_sb = kill_block_super, 137ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 138ba69f9abSJan Kara }; 1397f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 140fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 141ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 142bd81d8eeSLaurent Vivier 143d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 144d25425f8SDarrick J. Wong struct ext4_super_block *es) 145d25425f8SDarrick J. Wong { 146e2b911c5SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 147d25425f8SDarrick J. Wong return 1; 148d25425f8SDarrick J. Wong 149d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 150d25425f8SDarrick J. Wong } 151d25425f8SDarrick J. Wong 152a9c47317SDarrick J. Wong static __le32 ext4_superblock_csum(struct super_block *sb, 153a9c47317SDarrick J. Wong struct ext4_super_block *es) 154a9c47317SDarrick J. Wong { 155a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 156a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 157a9c47317SDarrick J. Wong __u32 csum; 158a9c47317SDarrick J. Wong 159a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 160a9c47317SDarrick J. Wong 161a9c47317SDarrick J. Wong return cpu_to_le32(csum); 162a9c47317SDarrick J. Wong } 163a9c47317SDarrick J. Wong 164c197855eSStephen Hemminger static int ext4_superblock_csum_verify(struct super_block *sb, 165a9c47317SDarrick J. Wong struct ext4_super_block *es) 166a9c47317SDarrick J. Wong { 1679aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 168a9c47317SDarrick J. Wong return 1; 169a9c47317SDarrick J. Wong 170a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 171a9c47317SDarrick J. Wong } 172a9c47317SDarrick J. Wong 17306db49e6STheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 174a9c47317SDarrick J. Wong { 17506db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 17606db49e6STheodore Ts'o 1779aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 178a9c47317SDarrick J. Wong return; 179a9c47317SDarrick J. Wong 180a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 181a9c47317SDarrick J. Wong } 182a9c47317SDarrick J. Wong 1839933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1849933fc0aSTheodore Ts'o { 1859933fc0aSTheodore Ts'o void *ret; 1869933fc0aSTheodore Ts'o 1878be04b93SJoe Perches ret = kmalloc(size, flags | __GFP_NOWARN); 1889933fc0aSTheodore Ts'o if (!ret) 1899933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1909933fc0aSTheodore Ts'o return ret; 1919933fc0aSTheodore Ts'o } 1929933fc0aSTheodore Ts'o 1939933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1949933fc0aSTheodore Ts'o { 1959933fc0aSTheodore Ts'o void *ret; 1969933fc0aSTheodore Ts'o 1978be04b93SJoe Perches ret = kzalloc(size, flags | __GFP_NOWARN); 1989933fc0aSTheodore Ts'o if (!ret) 1999933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 2009933fc0aSTheodore Ts'o return ret; 2019933fc0aSTheodore Ts'o } 2029933fc0aSTheodore Ts'o 2038fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 2048fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 205bd81d8eeSLaurent Vivier { 2063a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 2078fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2088fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 209bd81d8eeSLaurent Vivier } 210bd81d8eeSLaurent Vivier 2118fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 2128fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 213bd81d8eeSLaurent Vivier { 2145272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 2158fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2168fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 217bd81d8eeSLaurent Vivier } 218bd81d8eeSLaurent Vivier 2198fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 2208fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 221bd81d8eeSLaurent Vivier { 2225272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 2238fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2248fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 225bd81d8eeSLaurent Vivier } 226bd81d8eeSLaurent Vivier 227021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 228560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 229560671a0SAneesh Kumar K.V { 230560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 231560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 232560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 233560671a0SAneesh Kumar K.V } 234560671a0SAneesh Kumar K.V 235560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 236560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 237560671a0SAneesh Kumar K.V { 238560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 239560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 240560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 241560671a0SAneesh Kumar K.V } 242560671a0SAneesh Kumar K.V 243560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 244560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 245560671a0SAneesh Kumar K.V { 246560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 247560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 248560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 249560671a0SAneesh Kumar K.V } 250560671a0SAneesh Kumar K.V 251560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 252560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 253560671a0SAneesh Kumar K.V { 254560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 255560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 256560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 257560671a0SAneesh Kumar K.V } 258560671a0SAneesh Kumar K.V 2598fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2608fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 261bd81d8eeSLaurent Vivier { 2623a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2638fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2648fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 265bd81d8eeSLaurent Vivier } 266bd81d8eeSLaurent Vivier 2678fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2688fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 269bd81d8eeSLaurent Vivier { 2705272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2718fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2728fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 273bd81d8eeSLaurent Vivier } 274bd81d8eeSLaurent Vivier 2758fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2768fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 277bd81d8eeSLaurent Vivier { 2785272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2798fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2808fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 281bd81d8eeSLaurent Vivier } 282bd81d8eeSLaurent Vivier 283021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 284560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 285560671a0SAneesh Kumar K.V { 286560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 287560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 288560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 289560671a0SAneesh Kumar K.V } 290560671a0SAneesh Kumar K.V 291560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 292560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 293560671a0SAneesh Kumar K.V { 294560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 295560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 296560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 297560671a0SAneesh Kumar K.V } 298560671a0SAneesh Kumar K.V 299560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 300560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 301560671a0SAneesh Kumar K.V { 302560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 303560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 304560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 305560671a0SAneesh Kumar K.V } 306560671a0SAneesh Kumar K.V 307560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 308560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 309560671a0SAneesh Kumar K.V { 310560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 311560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 312560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 313560671a0SAneesh Kumar K.V } 314560671a0SAneesh Kumar K.V 3156a0678a7SArnd Bergmann static void __ext4_update_tstamp(__le32 *lo, __u8 *hi) 3166a0678a7SArnd Bergmann { 3176a0678a7SArnd Bergmann time64_t now = ktime_get_real_seconds(); 3186a0678a7SArnd Bergmann 3196a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 3206a0678a7SArnd Bergmann 3216a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 3226a0678a7SArnd Bergmann *hi = upper_32_bits(now); 3236a0678a7SArnd Bergmann } 3246a0678a7SArnd Bergmann 3256a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 3266a0678a7SArnd Bergmann { 3276a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 3286a0678a7SArnd Bergmann } 3296a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 3306a0678a7SArnd Bergmann __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 3316a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 3326a0678a7SArnd Bergmann __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 333d3d1faf6SCurt Wohlgemuth 3341c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3351c13d5c0STheodore Ts'o unsigned int line) 3361c13d5c0STheodore Ts'o { 3371c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3381c13d5c0STheodore Ts'o 3391c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3401b46617bSTheodore Ts'o if (bdev_read_only(sb->s_bdev)) 3411b46617bSTheodore Ts'o return; 3421c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3436a0678a7SArnd Bergmann ext4_update_tstamp(es, s_last_error_time); 3441c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3451c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3461c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3471c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3486a0678a7SArnd Bergmann es->s_first_error_time_hi = es->s_last_error_time_hi; 3491c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3501c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3511c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3521c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3531c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3541c13d5c0STheodore Ts'o } 35566e61a9eSTheodore Ts'o /* 35666e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 35766e61a9eSTheodore Ts'o * started already 35866e61a9eSTheodore Ts'o */ 35966e61a9eSTheodore Ts'o if (!es->s_error_count) 36066e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 361ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3621c13d5c0STheodore Ts'o } 3631c13d5c0STheodore Ts'o 3641c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3651c13d5c0STheodore Ts'o unsigned int line) 3661c13d5c0STheodore Ts'o { 3671c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3681c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3691c13d5c0STheodore Ts'o } 3701c13d5c0STheodore Ts'o 371bdfe0cbdSTheodore Ts'o /* 372bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 373bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 374bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 375bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 376bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 377bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 378bdfe0cbdSTheodore Ts'o */ 379bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 380bdfe0cbdSTheodore Ts'o { 381bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 382bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 383bdfe0cbdSTheodore Ts'o 384bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 385bdfe0cbdSTheodore Ts'o } 386bdfe0cbdSTheodore Ts'o 38718aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 38818aadd47SBobi Jam { 38918aadd47SBobi Jam struct super_block *sb = journal->j_private; 39018aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 39118aadd47SBobi Jam int error = is_journal_aborted(journal); 3925d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 39318aadd47SBobi Jam 3945d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 395a0154344SDaeho Jeong 396a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 397a0154344SDaeho Jeong 39818aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 3995d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 4005d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 4015d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 40218aadd47SBobi Jam list_del_init(&jce->jce_list); 40318aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 40418aadd47SBobi Jam jce->jce_func(sb, jce, error); 40518aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 40618aadd47SBobi Jam } 40718aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 40818aadd47SBobi Jam } 4091c13d5c0STheodore Ts'o 410ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 411ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 412ac27a0ecSDave Kleikamp * 413ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 414617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 415ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 416ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 417ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 418ac27a0ecSDave Kleikamp * write out the superblock safely. 419ac27a0ecSDave Kleikamp * 420dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 421d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 422ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 423ac27a0ecSDave Kleikamp */ 424ac27a0ecSDave Kleikamp 425617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 426ac27a0ecSDave Kleikamp { 427327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 428327eaf73STheodore Ts'o WARN_ON_ONCE(1); 429327eaf73STheodore Ts'o 430bc98a42cSDavid Howells if (sb_rdonly(sb)) 431ac27a0ecSDave Kleikamp return; 432ac27a0ecSDave Kleikamp 433ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 434617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 435ac27a0ecSDave Kleikamp 4364ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 437ac27a0ecSDave Kleikamp if (journal) 438dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 439ac27a0ecSDave Kleikamp } 440ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 441b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 4424418e141SDmitry Monakhov /* 4434418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 4444418e141SDmitry Monakhov * before ->s_flags update 4454418e141SDmitry Monakhov */ 4464418e141SDmitry Monakhov smp_wmb(); 4471751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 448ac27a0ecSDave Kleikamp } 4494327ba52SDaeho Jeong if (test_opt(sb, ERRORS_PANIC)) { 4504327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 4514327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 4524327ba52SDaeho Jeong return; 453617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 454ac27a0ecSDave Kleikamp sb->s_id); 455ac27a0ecSDave Kleikamp } 4564327ba52SDaeho Jeong } 457ac27a0ecSDave Kleikamp 458efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 459efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 460efbed4dcSTheodore Ts'o "EXT4-fs error") 461efbed4dcSTheodore Ts'o 46212062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 463c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 464ac27a0ecSDave Kleikamp { 4650ff2ea7dSJoe Perches struct va_format vaf; 466ac27a0ecSDave Kleikamp va_list args; 467ac27a0ecSDave Kleikamp 4680db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 4690db1ff22STheodore Ts'o return; 4700db1ff22STheodore Ts'o 471ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 472efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 473ac27a0ecSDave Kleikamp va_start(args, fmt); 4740ff2ea7dSJoe Perches vaf.fmt = fmt; 4750ff2ea7dSJoe Perches vaf.va = &args; 476efbed4dcSTheodore Ts'o printk(KERN_CRIT 477efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4780ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 479ac27a0ecSDave Kleikamp va_end(args); 480efbed4dcSTheodore Ts'o } 481f3fc0210STheodore Ts'o save_error_info(sb, function, line); 482617ba13bSMingming Cao ext4_handle_error(sb); 483ac27a0ecSDave Kleikamp } 484ac27a0ecSDave Kleikamp 485e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 486c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 487273df556SFrank Mayhar const char *fmt, ...) 488273df556SFrank Mayhar { 489273df556SFrank Mayhar va_list args; 490f7c21177STheodore Ts'o struct va_format vaf; 4911c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 492273df556SFrank Mayhar 4930db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 4940db1ff22STheodore Ts'o return; 4950db1ff22STheodore Ts'o 496ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 4971c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4981c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 499efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 500273df556SFrank Mayhar va_start(args, fmt); 501f7c21177STheodore Ts'o vaf.fmt = fmt; 502f7c21177STheodore Ts'o vaf.va = &args; 503c398eda0STheodore Ts'o if (block) 504d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 505d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 506d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 507d9ee81daSJoe Perches block, current->comm, &vaf); 508d9ee81daSJoe Perches else 509d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 510d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 511d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 512d9ee81daSJoe Perches current->comm, &vaf); 513273df556SFrank Mayhar va_end(args); 514efbed4dcSTheodore Ts'o } 515efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 516273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 517273df556SFrank Mayhar } 518273df556SFrank Mayhar 519e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 520f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 521f7c21177STheodore Ts'o const char *fmt, ...) 522273df556SFrank Mayhar { 523273df556SFrank Mayhar va_list args; 524f7c21177STheodore Ts'o struct va_format vaf; 5251c13d5c0STheodore Ts'o struct ext4_super_block *es; 526496ad9aaSAl Viro struct inode *inode = file_inode(file); 527273df556SFrank Mayhar char pathname[80], *path; 528273df556SFrank Mayhar 5290db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 5300db1ff22STheodore Ts'o return; 5310db1ff22STheodore Ts'o 532ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 5331c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 5341c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 535efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 5369bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 537f9a62d09SDan Carpenter if (IS_ERR(path)) 538273df556SFrank Mayhar path = "(unknown)"; 539f7c21177STheodore Ts'o va_start(args, fmt); 540f7c21177STheodore Ts'o vaf.fmt = fmt; 541f7c21177STheodore Ts'o vaf.va = &args; 542d9ee81daSJoe Perches if (block) 543d9ee81daSJoe Perches printk(KERN_CRIT 544d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 545d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 546d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 547d9ee81daSJoe Perches block, current->comm, path, &vaf); 548d9ee81daSJoe Perches else 549d9ee81daSJoe Perches printk(KERN_CRIT 550d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 551d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 552d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 553d9ee81daSJoe Perches current->comm, path, &vaf); 554273df556SFrank Mayhar va_end(args); 555efbed4dcSTheodore Ts'o } 556efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 557273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 558273df556SFrank Mayhar } 559273df556SFrank Mayhar 560722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 561ac27a0ecSDave Kleikamp char nbuf[16]) 562ac27a0ecSDave Kleikamp { 563ac27a0ecSDave Kleikamp char *errstr = NULL; 564ac27a0ecSDave Kleikamp 565ac27a0ecSDave Kleikamp switch (errno) { 5666a797d27SDarrick J. Wong case -EFSCORRUPTED: 5676a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 5686a797d27SDarrick J. Wong break; 5696a797d27SDarrick J. Wong case -EFSBADCRC: 5706a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 5716a797d27SDarrick J. Wong break; 572ac27a0ecSDave Kleikamp case -EIO: 573ac27a0ecSDave Kleikamp errstr = "IO failure"; 574ac27a0ecSDave Kleikamp break; 575ac27a0ecSDave Kleikamp case -ENOMEM: 576ac27a0ecSDave Kleikamp errstr = "Out of memory"; 577ac27a0ecSDave Kleikamp break; 578ac27a0ecSDave Kleikamp case -EROFS: 57978f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 58078f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 581ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 582ac27a0ecSDave Kleikamp else 583ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 584ac27a0ecSDave Kleikamp break; 585ac27a0ecSDave Kleikamp default: 586ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 587ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 588ac27a0ecSDave Kleikamp * NULL. */ 589ac27a0ecSDave Kleikamp if (nbuf) { 590ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 591ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 592ac27a0ecSDave Kleikamp errstr = nbuf; 593ac27a0ecSDave Kleikamp } 594ac27a0ecSDave Kleikamp break; 595ac27a0ecSDave Kleikamp } 596ac27a0ecSDave Kleikamp 597ac27a0ecSDave Kleikamp return errstr; 598ac27a0ecSDave Kleikamp } 599ac27a0ecSDave Kleikamp 600617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 601ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 602ac27a0ecSDave Kleikamp 603c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 604c398eda0STheodore Ts'o unsigned int line, int errno) 605ac27a0ecSDave Kleikamp { 606ac27a0ecSDave Kleikamp char nbuf[16]; 607ac27a0ecSDave Kleikamp const char *errstr; 608ac27a0ecSDave Kleikamp 6090db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 6100db1ff22STheodore Ts'o return; 6110db1ff22STheodore Ts'o 612ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 613ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 614ac27a0ecSDave Kleikamp * an error. */ 615bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 616ac27a0ecSDave Kleikamp return; 617ac27a0ecSDave Kleikamp 618efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 619617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 620c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 621c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 622efbed4dcSTheodore Ts'o } 623ac27a0ecSDave Kleikamp 624efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 625617ba13bSMingming Cao ext4_handle_error(sb); 626ac27a0ecSDave Kleikamp } 627ac27a0ecSDave Kleikamp 628ac27a0ecSDave Kleikamp /* 629617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 630ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 631ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 632ac27a0ecSDave Kleikamp * 633ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 634ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 635ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 636ac27a0ecSDave Kleikamp */ 637ac27a0ecSDave Kleikamp 638c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 639c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 640ac27a0ecSDave Kleikamp { 641651e1c3bSJoe Perches struct va_format vaf; 642ac27a0ecSDave Kleikamp va_list args; 643ac27a0ecSDave Kleikamp 6440db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 6450db1ff22STheodore Ts'o return; 6460db1ff22STheodore Ts'o 6471c13d5c0STheodore Ts'o save_error_info(sb, function, line); 648ac27a0ecSDave Kleikamp va_start(args, fmt); 649651e1c3bSJoe Perches vaf.fmt = fmt; 650651e1c3bSJoe Perches vaf.va = &args; 651651e1c3bSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: %pV\n", 652651e1c3bSJoe Perches sb->s_id, function, line, &vaf); 653ac27a0ecSDave Kleikamp va_end(args); 654ac27a0ecSDave Kleikamp 655bc98a42cSDavid Howells if (sb_rdonly(sb) == 0) { 656b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 6574ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 6584418e141SDmitry Monakhov /* 6594418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 6604418e141SDmitry Monakhov * before ->s_flags update 6614418e141SDmitry Monakhov */ 6624418e141SDmitry Monakhov smp_wmb(); 6631751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 664ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 665dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 6661c13d5c0STheodore Ts'o save_error_info(sb, function, line); 6671c13d5c0STheodore Ts'o } 6684327ba52SDaeho Jeong if (test_opt(sb, ERRORS_PANIC)) { 6694327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 6704327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 6714327ba52SDaeho Jeong return; 6721c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 673ac27a0ecSDave Kleikamp } 6744327ba52SDaeho Jeong } 675ac27a0ecSDave Kleikamp 676e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 677e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 678b31e1552SEric Sandeen { 6790ff2ea7dSJoe Perches struct va_format vaf; 680b31e1552SEric Sandeen va_list args; 681b31e1552SEric Sandeen 682efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 683efbed4dcSTheodore Ts'o return; 684efbed4dcSTheodore Ts'o 685b31e1552SEric Sandeen va_start(args, fmt); 6860ff2ea7dSJoe Perches vaf.fmt = fmt; 6870ff2ea7dSJoe Perches vaf.va = &args; 6880ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 689b31e1552SEric Sandeen va_end(args); 690b31e1552SEric Sandeen } 691b31e1552SEric Sandeen 692b03a2f7eSAndreas Dilger #define ext4_warning_ratelimit(sb) \ 693b03a2f7eSAndreas Dilger ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ 694b03a2f7eSAndreas Dilger "EXT4-fs warning") 695b03a2f7eSAndreas Dilger 69612062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 697c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 698ac27a0ecSDave Kleikamp { 6990ff2ea7dSJoe Perches struct va_format vaf; 700ac27a0ecSDave Kleikamp va_list args; 701ac27a0ecSDave Kleikamp 702b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 703efbed4dcSTheodore Ts'o return; 704efbed4dcSTheodore Ts'o 705ac27a0ecSDave Kleikamp va_start(args, fmt); 7060ff2ea7dSJoe Perches vaf.fmt = fmt; 7070ff2ea7dSJoe Perches vaf.va = &args; 7080ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 7090ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 710ac27a0ecSDave Kleikamp va_end(args); 711ac27a0ecSDave Kleikamp } 712ac27a0ecSDave Kleikamp 713b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 714b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 715b03a2f7eSAndreas Dilger { 716b03a2f7eSAndreas Dilger struct va_format vaf; 717b03a2f7eSAndreas Dilger va_list args; 718b03a2f7eSAndreas Dilger 719b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 720b03a2f7eSAndreas Dilger return; 721b03a2f7eSAndreas Dilger 722b03a2f7eSAndreas Dilger va_start(args, fmt); 723b03a2f7eSAndreas Dilger vaf.fmt = fmt; 724b03a2f7eSAndreas Dilger vaf.va = &args; 725b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 726b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 727b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 728b03a2f7eSAndreas Dilger va_end(args); 729b03a2f7eSAndreas Dilger } 730b03a2f7eSAndreas Dilger 731e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 732e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 733e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 734e29136f8STheodore Ts'o const char *fmt, ...) 7355d1b1b3fSAneesh Kumar K.V __releases(bitlock) 7365d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 7375d1b1b3fSAneesh Kumar K.V { 7380ff2ea7dSJoe Perches struct va_format vaf; 7395d1b1b3fSAneesh Kumar K.V va_list args; 7405d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 7415d1b1b3fSAneesh Kumar K.V 7420db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7430db1ff22STheodore Ts'o return; 7440db1ff22STheodore Ts'o 745ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 7461c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 7471c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 7481c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 7490ff2ea7dSJoe Perches 750efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 7515d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 7520ff2ea7dSJoe Perches vaf.fmt = fmt; 7530ff2ea7dSJoe Perches vaf.va = &args; 75421149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 755e29136f8STheodore Ts'o sb->s_id, function, line, grp); 756e29136f8STheodore Ts'o if (ino) 7570ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 758e29136f8STheodore Ts'o if (block) 759efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 760efbed4dcSTheodore Ts'o (unsigned long long) block); 7610ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 7625d1b1b3fSAneesh Kumar K.V va_end(args); 763efbed4dcSTheodore Ts'o } 7645d1b1b3fSAneesh Kumar K.V 765327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 766327eaf73STheodore Ts'o WARN_ON_ONCE(1); 767327eaf73STheodore Ts'o 7685d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 769e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 7705d1b1b3fSAneesh Kumar K.V return; 7715d1b1b3fSAneesh Kumar K.V } 7721c13d5c0STheodore Ts'o 7735d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 77406f29cc8SZhouyi Zhou ext4_commit_super(sb, 1); 7755d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 7765d1b1b3fSAneesh Kumar K.V /* 7775d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 7785d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 7795d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 7805d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 7815d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 78225985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 7835d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 7845d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 7855d1b1b3fSAneesh Kumar K.V * more appropriate error code. 7865d1b1b3fSAneesh Kumar K.V */ 7875d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 7885d1b1b3fSAneesh Kumar K.V return; 7895d1b1b3fSAneesh Kumar K.V } 7905d1b1b3fSAneesh Kumar K.V 791db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 792db79e6d1SWang Shilong ext4_group_t group, 793db79e6d1SWang Shilong unsigned int flags) 794db79e6d1SWang Shilong { 795db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 796db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 797db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 7989af0b3d1SWang Shilong int ret; 799db79e6d1SWang Shilong 8009af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 8019af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 8029af0b3d1SWang Shilong &grp->bb_state); 8039af0b3d1SWang Shilong if (!ret) 804db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 805db79e6d1SWang Shilong grp->bb_free); 806db79e6d1SWang Shilong } 807db79e6d1SWang Shilong 8089af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 8099af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 8109af0b3d1SWang Shilong &grp->bb_state); 8119af0b3d1SWang Shilong if (!ret && gdp) { 812db79e6d1SWang Shilong int count; 813db79e6d1SWang Shilong 814db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 815db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 816db79e6d1SWang Shilong count); 817db79e6d1SWang Shilong } 818db79e6d1SWang Shilong } 819db79e6d1SWang Shilong } 820db79e6d1SWang Shilong 821617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 822ac27a0ecSDave Kleikamp { 823617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 824ac27a0ecSDave Kleikamp 825617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 826ac27a0ecSDave Kleikamp return; 827ac27a0ecSDave Kleikamp 82812062dddSEric Sandeen ext4_warning(sb, 829ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 830ac27a0ecSDave Kleikamp "running e2fsck is recommended", 831617ba13bSMingming Cao EXT4_DYNAMIC_REV); 832ac27a0ecSDave Kleikamp 833617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 834617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 835617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 836ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 837ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 838ac27a0ecSDave Kleikamp 839ac27a0ecSDave Kleikamp /* 840ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 841ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 842ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 843ac27a0ecSDave Kleikamp */ 844ac27a0ecSDave Kleikamp } 845ac27a0ecSDave Kleikamp 846ac27a0ecSDave Kleikamp /* 847ac27a0ecSDave Kleikamp * Open the external journal device 848ac27a0ecSDave Kleikamp */ 849b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 850ac27a0ecSDave Kleikamp { 851ac27a0ecSDave Kleikamp struct block_device *bdev; 852ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 853ac27a0ecSDave Kleikamp 854d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 855ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 856ac27a0ecSDave Kleikamp goto fail; 857ac27a0ecSDave Kleikamp return bdev; 858ac27a0ecSDave Kleikamp 859ac27a0ecSDave Kleikamp fail: 860b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 861ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 862ac27a0ecSDave Kleikamp return NULL; 863ac27a0ecSDave Kleikamp } 864ac27a0ecSDave Kleikamp 865ac27a0ecSDave Kleikamp /* 866ac27a0ecSDave Kleikamp * Release the journal device 867ac27a0ecSDave Kleikamp */ 8684385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 869ac27a0ecSDave Kleikamp { 8704385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 871ac27a0ecSDave Kleikamp } 872ac27a0ecSDave Kleikamp 8734385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 874ac27a0ecSDave Kleikamp { 875ac27a0ecSDave Kleikamp struct block_device *bdev; 876ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 877ac27a0ecSDave Kleikamp if (bdev) { 8784385bab1SAl Viro ext4_blkdev_put(bdev); 879ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 880ac27a0ecSDave Kleikamp } 881ac27a0ecSDave Kleikamp } 882ac27a0ecSDave Kleikamp 883ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 884ac27a0ecSDave Kleikamp { 885617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 886ac27a0ecSDave Kleikamp } 887ac27a0ecSDave Kleikamp 888617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 889ac27a0ecSDave Kleikamp { 890ac27a0ecSDave Kleikamp struct list_head *l; 891ac27a0ecSDave Kleikamp 892b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 893ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 894ac27a0ecSDave Kleikamp 895ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 896ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 897ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 898ac27a0ecSDave Kleikamp printk(KERN_ERR " " 899ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 900ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 901ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 902ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 903ac27a0ecSDave Kleikamp } 904ac27a0ecSDave Kleikamp } 905ac27a0ecSDave Kleikamp 906957153fcSJan Kara #ifdef CONFIG_QUOTA 907957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 908957153fcSJan Kara 909957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 910957153fcSJan Kara { 911957153fcSJan Kara int type; 912957153fcSJan Kara 913957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 914957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 915957153fcSJan Kara ext4_quota_off(sb, type); 916957153fcSJan Kara } 917957153fcSJan Kara #else 918957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 919957153fcSJan Kara { 920957153fcSJan Kara } 921957153fcSJan Kara #endif 922957153fcSJan Kara 923617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 924ac27a0ecSDave Kleikamp { 925617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 926617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 92797abd7d4STheodore Ts'o int aborted = 0; 928ef2cabf7SHidehiro Kawai int i, err; 929ac27a0ecSDave Kleikamp 930857ac889SLukas Czerner ext4_unregister_li_request(sb); 931957153fcSJan Kara ext4_quota_off_umount(sb); 932e0ccfd95SChristoph Hellwig 9332e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 9344c0425ffSMingming Cao 9350390131bSFrank Mayhar if (sbi->s_journal) { 93697abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 937ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 93847b4a50bSJan Kara sbi->s_journal = NULL; 93997abd7d4STheodore Ts'o if ((err < 0) && !aborted) 940c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 9410390131bSFrank Mayhar } 942d4edac31SJosef Bacik 943ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 944d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 9459105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 946d4edac31SJosef Bacik ext4_release_system_zone(sb); 947d4edac31SJosef Bacik ext4_mb_release(sb); 948d4edac31SJosef Bacik ext4_ext_release(sb); 949d4edac31SJosef Bacik 950bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 951e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 952ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 953ac27a0ecSDave Kleikamp } 954bc98a42cSDavid Howells if (!sb_rdonly(sb)) 955a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 956a8e25a83SArtem Bityutskiy 957ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 958ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 959b93b41d4SAl Viro kvfree(sbi->s_group_desc); 960b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 96157042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 962ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 963ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 96457042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 965c8585c6fSDaeho Jeong percpu_free_rwsem(&sbi->s_journal_flag_rwsem); 966ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 967a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 968ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 969ac27a0ecSDave Kleikamp #endif 970ac27a0ecSDave Kleikamp 971ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 972ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 973ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 974ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 975ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 976ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 977ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 978ac27a0ecSDave Kleikamp 97989d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 980f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 981ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 982ac27a0ecSDave Kleikamp /* 983ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 984ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 985ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 986ac27a0ecSDave Kleikamp */ 987ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 988f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 989617ba13bSMingming Cao ext4_blkdev_remove(sbi); 990ac27a0ecSDave Kleikamp } 991dec214d0STahsin Erdogan if (sbi->s_ea_inode_cache) { 992dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 993dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 994dec214d0STahsin Erdogan } 99547387409STahsin Erdogan if (sbi->s_ea_block_cache) { 99647387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 99747387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 9989c191f70ST Makphaibulchoke } 999c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 1000c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 10019060dd2cSEric Sandeen brelse(sbi->s_sbh); 1002ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 10033197ebdbSTheodore Ts'o /* 10043197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 10053197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 10063197ebdbSTheodore Ts'o */ 10073197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 10083197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 10090441984aSDarrick J. Wong if (sbi->s_chksum_driver) 10100441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1011705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 10125e405595SDan Williams fs_put_dax(sbi->s_daxdev); 1013ac27a0ecSDave Kleikamp kfree(sbi); 1014ac27a0ecSDave Kleikamp } 1015ac27a0ecSDave Kleikamp 1016e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1017ac27a0ecSDave Kleikamp 1018ac27a0ecSDave Kleikamp /* 1019ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1020ac27a0ecSDave Kleikamp */ 1021617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1022ac27a0ecSDave Kleikamp { 1023617ba13bSMingming Cao struct ext4_inode_info *ei; 1024ac27a0ecSDave Kleikamp 1025e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 1026ac27a0ecSDave Kleikamp if (!ei) 1027ac27a0ecSDave Kleikamp return NULL; 10280b8e58a1SAndreas Dilger 1029ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1030202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1031c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 1032c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 10339a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 10349a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1035edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1036eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1037edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1038dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1039d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 10409d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 10417e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 1042d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 1043*1dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1044a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1045a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 104696c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1047a9e7f447SDmitry Monakhov #endif 10488aefcd55STheodore Ts'o ei->jinode = NULL; 10492e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1050744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1051b436b9beSJan Kara ei->i_sync_tid = 0; 1052b436b9beSJan Kara ei->i_datasync_tid = 0; 1053e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 10542e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1055ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1056ac27a0ecSDave Kleikamp } 1057ac27a0ecSDave Kleikamp 10587ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 10597ff9c073STheodore Ts'o { 10607ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 10617ff9c073STheodore Ts'o 10627ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 10637ff9c073STheodore Ts'o return drop; 10647ff9c073STheodore Ts'o } 10657ff9c073STheodore Ts'o 1066fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 1067fa0d7e3dSNick Piggin { 1068fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 1069fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1070fa0d7e3dSNick Piggin } 1071fa0d7e3dSNick Piggin 1072617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1073ac27a0ecSDave Kleikamp { 10749f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1075b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1076b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1077b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 10789f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 10799f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 10809f7dd93dSVasily Averin true); 10819f7dd93dSVasily Averin dump_stack(); 10829f7dd93dSVasily Averin } 1083fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 1084ac27a0ecSDave Kleikamp } 1085ac27a0ecSDave Kleikamp 108651cc5068SAlexey Dobriyan static void init_once(void *foo) 1087ac27a0ecSDave Kleikamp { 1088617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1089ac27a0ecSDave Kleikamp 1090ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1091ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 10920e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1093ea3d7209SJan Kara init_rwsem(&ei->i_mmap_sem); 1094ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1095ac27a0ecSDave Kleikamp } 1096ac27a0ecSDave Kleikamp 1097e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1098ac27a0ecSDave Kleikamp { 1099f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1100f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1101f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1102f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1103f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1104f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 110520c2df83SPaul Mundt init_once); 1106617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1107ac27a0ecSDave Kleikamp return -ENOMEM; 1108ac27a0ecSDave Kleikamp return 0; 1109ac27a0ecSDave Kleikamp } 1110ac27a0ecSDave Kleikamp 1111ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1112ac27a0ecSDave Kleikamp { 11138c0a8537SKirill A. Shutemov /* 11148c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 11158c0a8537SKirill A. Shutemov * destroy cache. 11168c0a8537SKirill A. Shutemov */ 11178c0a8537SKirill A. Shutemov rcu_barrier(); 1118617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1119ac27a0ecSDave Kleikamp } 1120ac27a0ecSDave Kleikamp 11210930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1122ac27a0ecSDave Kleikamp { 11230930fcc1SAl Viro invalidate_inode_buffers(inode); 1124dbd5768fSJan Kara clear_inode(inode); 11259f754758SChristoph Hellwig dquot_drop(inode); 1126c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 112751865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 11288aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 11298aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 11308aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 11318aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 11328aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 11338aefcd55STheodore Ts'o } 11343d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1135ac27a0ecSDave Kleikamp } 1136ac27a0ecSDave Kleikamp 11371b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 11381b961ac0SChristoph Hellwig u64 ino, u32 generation) 1139ac27a0ecSDave Kleikamp { 1140ac27a0ecSDave Kleikamp struct inode *inode; 1141ac27a0ecSDave Kleikamp 1142617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1143ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1144617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1145ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1146ac27a0ecSDave Kleikamp 1147ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1148ac27a0ecSDave Kleikamp * 1149617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1150ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1151ac27a0ecSDave Kleikamp * 1152ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1153ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1154ac27a0ecSDave Kleikamp */ 1155f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 11561d1fe1eeSDavid Howells if (IS_ERR(inode)) 11571d1fe1eeSDavid Howells return ERR_CAST(inode); 11581d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1159ac27a0ecSDave Kleikamp iput(inode); 1160ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1161ac27a0ecSDave Kleikamp } 11621b961ac0SChristoph Hellwig 11631b961ac0SChristoph Hellwig return inode; 1164ac27a0ecSDave Kleikamp } 11651b961ac0SChristoph Hellwig 11661b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 11671b961ac0SChristoph Hellwig int fh_len, int fh_type) 11681b961ac0SChristoph Hellwig { 11691b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 11701b961ac0SChristoph Hellwig ext4_nfs_get_inode); 11711b961ac0SChristoph Hellwig } 11721b961ac0SChristoph Hellwig 11731b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 11741b961ac0SChristoph Hellwig int fh_len, int fh_type) 11751b961ac0SChristoph Hellwig { 11761b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 11771b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1178ac27a0ecSDave Kleikamp } 1179ac27a0ecSDave Kleikamp 1180c39a7f84SToshiyuki Okajima /* 1181c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1182c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1183c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1184c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1185c39a7f84SToshiyuki Okajima */ 11860b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11870b8e58a1SAndreas Dilger gfp_t wait) 1188c39a7f84SToshiyuki Okajima { 1189c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1190c39a7f84SToshiyuki Okajima 1191c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1192c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1193c39a7f84SToshiyuki Okajima return 0; 1194c39a7f84SToshiyuki Okajima if (journal) 1195c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1196d0164adcSMel Gorman wait & ~__GFP_DIRECT_RECLAIM); 1197c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1198c39a7f84SToshiyuki Okajima } 1199c39a7f84SToshiyuki Okajima 1200a7550b30SJaegeuk Kim #ifdef CONFIG_EXT4_FS_ENCRYPTION 1201a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1202a7550b30SJaegeuk Kim { 1203a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1204a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1205a7550b30SJaegeuk Kim } 1206a7550b30SJaegeuk Kim 1207a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1208a7550b30SJaegeuk Kim void *fs_data) 1209a7550b30SJaegeuk Kim { 12102f8f5e76SEric Biggers handle_t *handle = fs_data; 1211c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1212a7550b30SJaegeuk Kim 12139ce0151aSEric Biggers /* 12149ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 12159ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 12169ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 12179ce0151aSEric Biggers * the filename "lost+found" itself. 12189ce0151aSEric Biggers */ 12199ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 12209ce0151aSEric Biggers return -EPERM; 1221a7550b30SJaegeuk Kim 12227d3e06a8SRoss Zwisler if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) 12237d3e06a8SRoss Zwisler return -EINVAL; 12247d3e06a8SRoss Zwisler 122594840e3cSEric Biggers res = ext4_convert_inline_data(inode); 122694840e3cSEric Biggers if (res) 122794840e3cSEric Biggers return res; 122894840e3cSEric Biggers 12292f8f5e76SEric Biggers /* 12302f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 12312f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 12322f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 12332f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 12342f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 12352f8f5e76SEric Biggers */ 12362f8f5e76SEric Biggers 12372f8f5e76SEric Biggers if (handle) { 12382f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 12392f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 12402f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 12412f8f5e76SEric Biggers ctx, len, 0); 1242a7550b30SJaegeuk Kim if (!res) { 1243a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1244a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1245a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1246a3caa24bSJan Kara /* 12472ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 12482ee6a576SEric Biggers * S_DAX may be disabled 1249a3caa24bSJan Kara */ 1250a3caa24bSJan Kara ext4_set_inode_flags(inode); 1251a7550b30SJaegeuk Kim } 1252a7550b30SJaegeuk Kim return res; 1253a7550b30SJaegeuk Kim } 1254a7550b30SJaegeuk Kim 1255b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1256b8cb5a54STahsin Erdogan if (res) 1257b8cb5a54STahsin Erdogan return res; 12582f8f5e76SEric Biggers retry: 1259af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1260af65207cSTahsin Erdogan &credits); 1261dec214d0STahsin Erdogan if (res) 1262dec214d0STahsin Erdogan return res; 1263dec214d0STahsin Erdogan 1264c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1265a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1266a7550b30SJaegeuk Kim return PTR_ERR(handle); 1267a7550b30SJaegeuk Kim 12682f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 12692f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 12702f8f5e76SEric Biggers ctx, len, 0); 1271a7550b30SJaegeuk Kim if (!res) { 1272a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 12732ee6a576SEric Biggers /* 12742ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 12752ee6a576SEric Biggers * S_DAX may be disabled 12762ee6a576SEric Biggers */ 1277a3caa24bSJan Kara ext4_set_inode_flags(inode); 1278a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1279a7550b30SJaegeuk Kim if (res) 1280a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1281a7550b30SJaegeuk Kim } 1282a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 12832f8f5e76SEric Biggers 12842f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 12852f8f5e76SEric Biggers goto retry; 1286a7550b30SJaegeuk Kim if (!res) 1287a7550b30SJaegeuk Kim res = res2; 1288a7550b30SJaegeuk Kim return res; 1289a7550b30SJaegeuk Kim } 1290a7550b30SJaegeuk Kim 1291c250b7ddSEric Biggers static bool ext4_dummy_context(struct inode *inode) 1292a7550b30SJaegeuk Kim { 1293a7550b30SJaegeuk Kim return DUMMY_ENCRYPTION_ENABLED(EXT4_SB(inode->i_sb)); 1294a7550b30SJaegeuk Kim } 1295a7550b30SJaegeuk Kim 12966f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1297a5d431efSEric Biggers .key_prefix = "ext4:", 1298a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1299a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1300a7550b30SJaegeuk Kim .dummy_context = ext4_dummy_context, 1301a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1302e12ee683SEric Biggers .max_namelen = EXT4_NAME_LEN, 1303a7550b30SJaegeuk Kim }; 1304a7550b30SJaegeuk Kim #endif 1305a7550b30SJaegeuk Kim 1306ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1307d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1308689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1309ac27a0ecSDave Kleikamp 1310617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1311617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1312617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1313617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1314617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 13156f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 13168c54ca9cSAl Viro const struct path *path); 1317617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1318617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1319ac27a0ecSDave Kleikamp size_t len, loff_t off); 1320617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1321ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 13227c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 13237c319d32SAditya Kali unsigned int flags); 13247c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 13258f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid); 1326ac27a0ecSDave Kleikamp 132796c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 132896c7e0d9SJan Kara { 132996c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 133096c7e0d9SJan Kara } 133196c7e0d9SJan Kara 133261e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 133360e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1334617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1335617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1336617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1337617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1338a5b5ee32SJan Kara .write_info = ext4_write_info, 1339a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1340a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1341040cb378SLi Xi .get_projid = ext4_get_projid, 13427a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 13438f0e8746STheodore Ts'o .get_next_id = ext4_get_next_id, 1344ac27a0ecSDave Kleikamp }; 1345ac27a0ecSDave Kleikamp 13460d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1347617ba13bSMingming Cao .quota_on = ext4_quota_on, 1348ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1349287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 13500a240339SJan Kara .get_state = dquot_get_state, 1351287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1352287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 13536332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 13546332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1355ac27a0ecSDave Kleikamp }; 1356ac27a0ecSDave Kleikamp #endif 1357ac27a0ecSDave Kleikamp 1358ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1359617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1360617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1361617ba13bSMingming Cao .write_inode = ext4_write_inode, 1362617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 13637ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 13640930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1365617ba13bSMingming Cao .put_super = ext4_put_super, 1366617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1367c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1368c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1369617ba13bSMingming Cao .statfs = ext4_statfs, 1370617ba13bSMingming Cao .remount_fs = ext4_remount, 1371617ba13bSMingming Cao .show_options = ext4_show_options, 1372ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1373617ba13bSMingming Cao .quota_read = ext4_quota_read, 1374617ba13bSMingming Cao .quota_write = ext4_quota_write, 137596c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1376ac27a0ecSDave Kleikamp #endif 1377c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1378ac27a0ecSDave Kleikamp }; 1379ac27a0ecSDave Kleikamp 138039655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 13811b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 13821b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1383617ba13bSMingming Cao .get_parent = ext4_get_parent, 1384ac27a0ecSDave Kleikamp }; 1385ac27a0ecSDave Kleikamp 1386ac27a0ecSDave Kleikamp enum { 1387ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1388ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 138972578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1390ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 139172578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1392ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1393ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1394ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 13956ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 1396ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 13975a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1398ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 139949da9392SJan Kara Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax, 1400327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 1401327eaf73STheodore Ts'o Opt_nowarn_on_error, Opt_mblk_io_submit, 1402670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 14031449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 14045328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1405744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1406fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1407cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 1408ac27a0ecSDave Kleikamp }; 1409ac27a0ecSDave Kleikamp 1410a447c093SSteven Whitehouse static const match_table_t tokens = { 1411ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1412ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1413ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1414ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1415ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1416ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1417ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1418ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1419ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1420ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1421ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1422ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1423ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1424ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 142572578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 142672578c33STheodore Ts'o {Opt_removed, "orlov"}, 1427ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1428ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1429ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1430ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1431e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 14325a916be1STheodore Ts'o {Opt_noload, "noload"}, 143372578c33STheodore Ts'o {Opt_removed, "nobh"}, 143472578c33STheodore Ts'o {Opt_removed, "bh"}, 1435ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 143630773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 143730773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1438ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1439ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1440818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1441c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1442818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1443ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1444ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1445ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1446ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 14475bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 14485bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1449ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1450ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1451ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1452ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1453ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1454ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 14555a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1456ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1457ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1458ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1459ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 146049da9392SJan Kara {Opt_prjquota, "prjquota"}, 1461ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 146206705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 146306705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 146425ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1465923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 1466c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 146764769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1468327eaf73STheodore Ts'o {Opt_warn_on_error, "warn_on_error"}, 1469327eaf73STheodore Ts'o {Opt_nowarn_on_error, "nowarn_on_error"}, 1470a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1471a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1472670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1473dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 147436ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 147536ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 14766fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 14776fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1478240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1479b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1480afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 148106705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 148206705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1483744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1484744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 14855328e635SEric Sandeen {Opt_discard, "discard"}, 14865328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1487fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1488fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1489fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1490df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 14916ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 1492cdb7ee4cSTahsin Erdogan {Opt_nombcache, "nombcache"}, 1493cdb7ee4cSTahsin Erdogan {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ 1494c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1495c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1496c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1497c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1498c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1499f3f12faaSJosef Bacik {Opt_err, NULL}, 1500ac27a0ecSDave Kleikamp }; 1501ac27a0ecSDave Kleikamp 1502617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1503ac27a0ecSDave Kleikamp { 1504617ba13bSMingming Cao ext4_fsblk_t sb_block; 1505ac27a0ecSDave Kleikamp char *options = (char *) *data; 1506ac27a0ecSDave Kleikamp 1507ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1508ac27a0ecSDave Kleikamp return 1; /* Default location */ 15090b8e58a1SAndreas Dilger 1510ac27a0ecSDave Kleikamp options += 3; 15110b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1512ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1513ac27a0ecSDave Kleikamp if (*options && *options != ',') { 15144776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1515ac27a0ecSDave Kleikamp (char *) *data); 1516ac27a0ecSDave Kleikamp return 1; 1517ac27a0ecSDave Kleikamp } 1518ac27a0ecSDave Kleikamp if (*options == ',') 1519ac27a0ecSDave Kleikamp options++; 1520ac27a0ecSDave Kleikamp *data = (void *) options; 15210b8e58a1SAndreas Dilger 1522ac27a0ecSDave Kleikamp return sb_block; 1523ac27a0ecSDave Kleikamp } 1524ac27a0ecSDave Kleikamp 1525b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1526d6006186SEric Biggers static const char deprecated_msg[] = 1527d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1528437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1529b3881f74STheodore Ts'o 153056c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 153156c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 153256c50f11SDmitry Monakhov { 153356c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 153456c50f11SDmitry Monakhov char *qname; 153503dafb5fSChen Gang int ret = -1; 153656c50f11SDmitry Monakhov 153756c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 153856c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 153956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 154056c50f11SDmitry Monakhov "Cannot change journaled " 154156c50f11SDmitry Monakhov "quota options when quota turned on"); 154257f73c2cSTheodore Ts'o return -1; 154356c50f11SDmitry Monakhov } 1544e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1545c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, "Journaled quota options " 1546c325a67cSTheodore Ts'o "ignored when QUOTA feature is enabled"); 1547c325a67cSTheodore Ts'o return 1; 1548262b4662SJan Kara } 154956c50f11SDmitry Monakhov qname = match_strdup(args); 155056c50f11SDmitry Monakhov if (!qname) { 155156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 155256c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 155357f73c2cSTheodore Ts'o return -1; 155456c50f11SDmitry Monakhov } 155503dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 155603dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 155703dafb5fSChen Gang ret = 1; 155803dafb5fSChen Gang else 155956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 156003dafb5fSChen Gang "%s quota file already specified", 156103dafb5fSChen Gang QTYPE2NAME(qtype)); 156203dafb5fSChen Gang goto errout; 156356c50f11SDmitry Monakhov } 156403dafb5fSChen Gang if (strchr(qname, '/')) { 156556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 156656c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 156703dafb5fSChen Gang goto errout; 156856c50f11SDmitry Monakhov } 156903dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1570fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 157156c50f11SDmitry Monakhov return 1; 157203dafb5fSChen Gang errout: 157303dafb5fSChen Gang kfree(qname); 157403dafb5fSChen Gang return ret; 157556c50f11SDmitry Monakhov } 157656c50f11SDmitry Monakhov 157756c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 157856c50f11SDmitry Monakhov { 157956c50f11SDmitry Monakhov 158056c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 158156c50f11SDmitry Monakhov 158256c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 158356c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 158456c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 158556c50f11SDmitry Monakhov " when quota turned on"); 158657f73c2cSTheodore Ts'o return -1; 158756c50f11SDmitry Monakhov } 158803dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 158956c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 159056c50f11SDmitry Monakhov return 1; 159156c50f11SDmitry Monakhov } 159256c50f11SDmitry Monakhov #endif 159356c50f11SDmitry Monakhov 159426092bf5STheodore Ts'o #define MOPT_SET 0x0001 159526092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 159626092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 159726092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 159826092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 159926092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 160026092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 160126092bf5STheodore Ts'o #define MOPT_Q 0 160226092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 160326092bf5STheodore Ts'o #else 160426092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 160526092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 160626092bf5STheodore Ts'o #endif 160726092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 16088dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 16098dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 16108dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1611ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 161226092bf5STheodore Ts'o 161326092bf5STheodore Ts'o static const struct mount_opts { 161426092bf5STheodore Ts'o int token; 161526092bf5STheodore Ts'o int mount_opt; 161626092bf5STheodore Ts'o int flags; 161726092bf5STheodore Ts'o } ext4_mount_opts[] = { 161826092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 161926092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 162026092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 162126092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 162226092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 162326092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 16248dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 16258dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 16268dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 16278dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 162826092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 162926092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 16308dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 16318dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 16328dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 163359d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1634327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 1635327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 1636c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1637c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 16388dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 16391e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 164026092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 16418dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 16421e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 16438dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 164426092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 164526092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 164626092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 16478dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 16487915a861SAles Novak MOPT_NO_EXT2}, 16498dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 16507915a861SAles Novak MOPT_NO_EXT2}, 165126092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 165226092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 165326092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 165426092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 165526092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 165626092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 165726092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 165826092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 165926092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 166026092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 1661923ae0ffSRoss Zwisler {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, 166226092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 16630efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 16640efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 16655ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 16665ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 16675ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 16688dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 16698dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 16708dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 16718dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 167226092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 167326092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 167426092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 167526092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 167626092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 167726092bf5STheodore Ts'o #else 167826092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 167926092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 168026092bf5STheodore Ts'o #endif 168126092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 168226092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 1683670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 168426092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 168526092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 168626092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 168726092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 168826092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 168949da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 169049da9392SJan Kara MOPT_SET | MOPT_Q}, 169126092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 169249da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 169349da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 169426092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 169526092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 169626092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 169726092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 169826092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 169926092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 170026092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1701df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 17026ddb2447STheodore Ts'o {Opt_test_dummy_encryption, 0, MOPT_GTE0}, 1703cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 170426092bf5STheodore Ts'o {Opt_err, 0, 0} 170526092bf5STheodore Ts'o }; 170626092bf5STheodore Ts'o 170726092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 170826092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 170926092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 171026092bf5STheodore Ts'o { 171126092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 171226092bf5STheodore Ts'o const struct mount_opts *m; 171308cefc7aSEric W. Biederman kuid_t uid; 171408cefc7aSEric W. Biederman kgid_t gid; 171526092bf5STheodore Ts'o int arg = 0; 171626092bf5STheodore Ts'o 171757f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 171857f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 171957f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 172057f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 172157f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 172257f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 172357f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 172457f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 172557f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 172657f73c2cSTheodore Ts'o #endif 172726092bf5STheodore Ts'o switch (token) { 1728f7048605STheodore Ts'o case Opt_noacl: 1729f7048605STheodore Ts'o case Opt_nouser_xattr: 1730f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1731f7048605STheodore Ts'o break; 173226092bf5STheodore Ts'o case Opt_sb: 173326092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 173426092bf5STheodore Ts'o case Opt_removed: 17355f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 173626092bf5STheodore Ts'o return 1; 173726092bf5STheodore Ts'o case Opt_abort: 173826092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 173926092bf5STheodore Ts'o return 1; 174026092bf5STheodore Ts'o case Opt_i_version: 1741357fdad0SMatthew Garrett sb->s_flags |= SB_I_VERSION; 174226092bf5STheodore Ts'o return 1; 1743a26f4992STheodore Ts'o case Opt_lazytime: 17441751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 1745a26f4992STheodore Ts'o return 1; 1746a26f4992STheodore Ts'o case Opt_nolazytime: 17471751e8a6SLinus Torvalds sb->s_flags &= ~SB_LAZYTIME; 1748a26f4992STheodore Ts'o return 1; 174926092bf5STheodore Ts'o } 175026092bf5STheodore Ts'o 17515f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 17525f3633e3SJan Kara if (token == m->token) 17535f3633e3SJan Kara break; 17545f3633e3SJan Kara 17555f3633e3SJan Kara if (m->token == Opt_err) { 17565f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 17575f3633e3SJan Kara "or missing value", opt); 17585f3633e3SJan Kara return -1; 17595f3633e3SJan Kara } 17605f3633e3SJan Kara 17618dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 17628dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 17638dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 17648dc0aa8cSTheodore Ts'o return -1; 17658dc0aa8cSTheodore Ts'o } 17668dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 17678dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 17688dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 17698dc0aa8cSTheodore Ts'o return -1; 17708dc0aa8cSTheodore Ts'o } 17718dc0aa8cSTheodore Ts'o 1772ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 17730efb3b23SJan Kara return -1; 177426092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 177526092bf5STheodore Ts'o return -1; 1776c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 1777c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 177826092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 17791e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 17801e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 1781c93cf2d7SDmitry Monakhov } else 1782c93cf2d7SDmitry Monakhov return -1; 1783c93cf2d7SDmitry Monakhov } 178426092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 178526092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 178626092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 178726092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 178826092bf5STheodore Ts'o "options when quota turned on"); 178926092bf5STheodore Ts'o return -1; 179026092bf5STheodore Ts'o } 179126092bf5STheodore Ts'o 179226092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 179326092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 179426092bf5STheodore Ts'o } else if (token == Opt_commit) { 179526092bf5STheodore Ts'o if (arg == 0) 179626092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 179726092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 1798670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 1799670e9875STheodore Ts'o sbi->s_want_extra_isize = arg; 180026092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 180126092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 180226092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 180326092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 180426092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1805e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1806e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1807e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1808e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 180926092bf5STheodore Ts'o return -1; 181026092bf5STheodore Ts'o } 181126092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 181226092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 181326092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 181426092bf5STheodore Ts'o if (!args->from) 181526092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 181626092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1817df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1818df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 181926092bf5STheodore Ts'o } else if (token == Opt_stripe) { 182026092bf5STheodore Ts'o sbi->s_stripe = arg; 18210efb3b23SJan Kara } else if (token == Opt_resuid) { 18220efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 18230efb3b23SJan Kara if (!uid_valid(uid)) { 18245f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 18250efb3b23SJan Kara return -1; 18260efb3b23SJan Kara } 18270efb3b23SJan Kara sbi->s_resuid = uid; 18280efb3b23SJan Kara } else if (token == Opt_resgid) { 18290efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 18300efb3b23SJan Kara if (!gid_valid(gid)) { 18315f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 18320efb3b23SJan Kara return -1; 18330efb3b23SJan Kara } 18340efb3b23SJan Kara sbi->s_resgid = gid; 18350efb3b23SJan Kara } else if (token == Opt_journal_dev) { 18360efb3b23SJan Kara if (is_remount) { 18370efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 18380efb3b23SJan Kara "Cannot specify journal on remount"); 18390efb3b23SJan Kara return -1; 18400efb3b23SJan Kara } 18410efb3b23SJan Kara *journal_devnum = arg; 1842ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1843ad4eec61SEric Sandeen char *journal_path; 1844ad4eec61SEric Sandeen struct inode *journal_inode; 1845ad4eec61SEric Sandeen struct path path; 1846ad4eec61SEric Sandeen int error; 1847ad4eec61SEric Sandeen 1848ad4eec61SEric Sandeen if (is_remount) { 1849ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1850ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1851ad4eec61SEric Sandeen return -1; 1852ad4eec61SEric Sandeen } 1853ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1854ad4eec61SEric Sandeen if (!journal_path) { 1855ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1856ad4eec61SEric Sandeen "journal device string"); 1857ad4eec61SEric Sandeen return -1; 1858ad4eec61SEric Sandeen } 1859ad4eec61SEric Sandeen 1860ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1861ad4eec61SEric Sandeen if (error) { 1862ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1863ad4eec61SEric Sandeen "journal device path: error %d", error); 1864ad4eec61SEric Sandeen kfree(journal_path); 1865ad4eec61SEric Sandeen return -1; 1866ad4eec61SEric Sandeen } 1867ad4eec61SEric Sandeen 18682b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 1869ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1870ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1871ad4eec61SEric Sandeen "is not a block device", journal_path); 1872ad4eec61SEric Sandeen path_put(&path); 1873ad4eec61SEric Sandeen kfree(journal_path); 1874ad4eec61SEric Sandeen return -1; 1875ad4eec61SEric Sandeen } 1876ad4eec61SEric Sandeen 1877ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1878ad4eec61SEric Sandeen path_put(&path); 1879ad4eec61SEric Sandeen kfree(journal_path); 18800efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 18810efb3b23SJan Kara if (arg > 7) { 18825f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 18830efb3b23SJan Kara " (must be 0-7)"); 18840efb3b23SJan Kara return -1; 18850efb3b23SJan Kara } 18860efb3b23SJan Kara *journal_ioprio = 18870efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 18886ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 18896ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 18906ddb2447STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; 18916ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 18926ddb2447STheodore Ts'o "Test dummy encryption mode enabled"); 18936ddb2447STheodore Ts'o #else 18946ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 18956ddb2447STheodore Ts'o "Test dummy encryption mount option ignored"); 18966ddb2447STheodore Ts'o #endif 189726092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 189826092bf5STheodore Ts'o if (is_remount) { 189926092bf5STheodore Ts'o if (!sbi->s_journal) 190026092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 19015f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 190226092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 190326092bf5STheodore Ts'o "Cannot change data mode on remount"); 190426092bf5STheodore Ts'o return -1; 190526092bf5STheodore Ts'o } 190626092bf5STheodore Ts'o } else { 190726092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 190826092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 190926092bf5STheodore Ts'o } 191026092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 191126092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 191226092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 191326092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 19145f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 19155f3633e3SJan Kara "quota options when quota turned on"); 191626092bf5STheodore Ts'o return -1; 191726092bf5STheodore Ts'o } 1918e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1919c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, 1920c325a67cSTheodore Ts'o "Quota format mount options ignored " 1921262b4662SJan Kara "when QUOTA feature is enabled"); 1922c325a67cSTheodore Ts'o return 1; 1923262b4662SJan Kara } 192426092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 192526092bf5STheodore Ts'o #endif 1926923ae0ffSRoss Zwisler } else if (token == Opt_dax) { 1927ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 1928ef83b6e8SDan Williams ext4_msg(sb, KERN_WARNING, 1929ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 1930ef83b6e8SDan Williams sbi->s_mount_opt |= m->mount_opt; 1931ef83b6e8SDan Williams #else 1932923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 1933923ae0ffSRoss Zwisler return -1; 1934923ae0ffSRoss Zwisler #endif 19357915a861SAles Novak } else if (token == Opt_data_err_abort) { 19367915a861SAles Novak sbi->s_mount_opt |= m->mount_opt; 19377915a861SAles Novak } else if (token == Opt_data_err_ignore) { 19387915a861SAles Novak sbi->s_mount_opt &= ~m->mount_opt; 193926092bf5STheodore Ts'o } else { 194026092bf5STheodore Ts'o if (!args->from) 194126092bf5STheodore Ts'o arg = 1; 194226092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 194326092bf5STheodore Ts'o arg = !arg; 194426092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 194526092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 194626092bf5STheodore Ts'o "buggy handling of option %s", opt); 194726092bf5STheodore Ts'o WARN_ON(1); 194826092bf5STheodore Ts'o return -1; 194926092bf5STheodore Ts'o } 195026092bf5STheodore Ts'o if (arg != 0) 195126092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 195226092bf5STheodore Ts'o else 195326092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 195426092bf5STheodore Ts'o } 195526092bf5STheodore Ts'o return 1; 195626092bf5STheodore Ts'o } 195726092bf5STheodore Ts'o 1958ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1959c3191067STheodore Ts'o unsigned long *journal_devnum, 1960b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1961661aa520SEric Sandeen int is_remount) 1962ac27a0ecSDave Kleikamp { 1963617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1964ac27a0ecSDave Kleikamp char *p; 1965ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 196626092bf5STheodore Ts'o int token; 1967ac27a0ecSDave Kleikamp 1968ac27a0ecSDave Kleikamp if (!options) 1969ac27a0ecSDave Kleikamp return 1; 1970ac27a0ecSDave Kleikamp 1971ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1972ac27a0ecSDave Kleikamp if (!*p) 1973ac27a0ecSDave Kleikamp continue; 197415121c18SEric Sandeen /* 197515121c18SEric Sandeen * Initialize args struct so we know whether arg was 197615121c18SEric Sandeen * found; some options take optional arguments. 197715121c18SEric Sandeen */ 1978caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1979ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 198026092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 198126092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1982ac27a0ecSDave Kleikamp return 0; 1983ac27a0ecSDave Kleikamp } 1984ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 198549da9392SJan Kara /* 198649da9392SJan Kara * We do the test below only for project quotas. 'usrquota' and 198749da9392SJan Kara * 'grpquota' mount options are allowed even without quota feature 198849da9392SJan Kara * to support legacy quotas in quota files. 198949da9392SJan Kara */ 199049da9392SJan Kara if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { 199149da9392SJan Kara ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " 199249da9392SJan Kara "Cannot enable project quota enforcement."); 199349da9392SJan Kara return 0; 199449da9392SJan Kara } 199549da9392SJan Kara if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1996482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1997fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1998ac27a0ecSDave Kleikamp 1999482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 2000fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 2001ac27a0ecSDave Kleikamp 200256c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 2003b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 2004b31e1552SEric Sandeen "format mixing"); 2005ac27a0ecSDave Kleikamp return 0; 2006ac27a0ecSDave Kleikamp } 2007ac27a0ecSDave Kleikamp 2008ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 2009b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 2010b31e1552SEric Sandeen "not specified"); 2011ac27a0ecSDave Kleikamp return 0; 2012ac27a0ecSDave Kleikamp } 2013ac27a0ecSDave Kleikamp } 2014ac27a0ecSDave Kleikamp #endif 2015261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 2016261cb20cSJan Kara int blocksize = 2017261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 2018261cb20cSJan Kara 201909cbfeafSKirill A. Shutemov if (blocksize < PAGE_SIZE) { 2020261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 2021261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 2022261cb20cSJan Kara return 0; 2023261cb20cSJan Kara } 2024261cb20cSJan Kara } 2025ac27a0ecSDave Kleikamp return 1; 2026ac27a0ecSDave Kleikamp } 2027ac27a0ecSDave Kleikamp 20282adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 20292adf6da8STheodore Ts'o struct super_block *sb) 20302adf6da8STheodore Ts'o { 20312adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 20322adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 20332adf6da8STheodore Ts'o 20342adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 20352adf6da8STheodore Ts'o char *fmtname = ""; 20362adf6da8STheodore Ts'o 20372adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 20382adf6da8STheodore Ts'o case QFMT_VFS_OLD: 20392adf6da8STheodore Ts'o fmtname = "vfsold"; 20402adf6da8STheodore Ts'o break; 20412adf6da8STheodore Ts'o case QFMT_VFS_V0: 20422adf6da8STheodore Ts'o fmtname = "vfsv0"; 20432adf6da8STheodore Ts'o break; 20442adf6da8STheodore Ts'o case QFMT_VFS_V1: 20452adf6da8STheodore Ts'o fmtname = "vfsv1"; 20462adf6da8STheodore Ts'o break; 20472adf6da8STheodore Ts'o } 20482adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 20492adf6da8STheodore Ts'o } 20502adf6da8STheodore Ts'o 20512adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 2052a068acf2SKees Cook seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); 20532adf6da8STheodore Ts'o 20542adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 2055a068acf2SKees Cook seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); 20562adf6da8STheodore Ts'o #endif 20572adf6da8STheodore Ts'o } 20582adf6da8STheodore Ts'o 20595a916be1STheodore Ts'o static const char *token2str(int token) 20605a916be1STheodore Ts'o { 206150df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 20625a916be1STheodore Ts'o 20635a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 20645a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 20655a916be1STheodore Ts'o break; 20665a916be1STheodore Ts'o return t->pattern; 20675a916be1STheodore Ts'o } 20685a916be1STheodore Ts'o 20692adf6da8STheodore Ts'o /* 20702adf6da8STheodore Ts'o * Show an option if 20712adf6da8STheodore Ts'o * - it's set to a non-default value OR 20722adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 20732adf6da8STheodore Ts'o */ 207466acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 207566acdcf4STheodore Ts'o int nodefs) 20762adf6da8STheodore Ts'o { 20772adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 20782adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 207968afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 20805a916be1STheodore Ts'o const struct mount_opts *m; 208166acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 20822adf6da8STheodore Ts'o 208366acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 208466acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 20852adf6da8STheodore Ts'o 20862adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 20875a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 20885a916be1STheodore Ts'o 20895a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 20905a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 20915a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 20925a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 20935a916be1STheodore Ts'o continue; 209468afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 20955a916be1STheodore Ts'o continue; /* skip if same as the default */ 20965a916be1STheodore Ts'o if ((want_set && 20975a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 20985a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 20995a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 21005a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 21015a916be1STheodore Ts'o } 21025a916be1STheodore Ts'o 210308cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 21045a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 210508cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 210608cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 210708cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 21085a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 210908cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 211008cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 211166acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 21125a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 21135a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 21142adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 21155a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 21162adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 21175a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 211866acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 21195a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 212066acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 21215a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 212266acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 21235a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 2124357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 21255a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 212666acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 21275a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 212868afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 212968afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 21302adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 21315a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 21322adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 21335a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 21342adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 21355a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 21365a916be1STheodore Ts'o } 213766acdcf4STheodore Ts'o if (nodefs || 213866acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 21395a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 21402adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 21412adf6da8STheodore Ts'o 2142ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 214366acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 21445a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2145df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2146df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 21477915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 21487915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 2149338affb5SEric Biggers if (DUMMY_ENCRYPTION_ENABLED(sbi)) 2150338affb5SEric Biggers SEQ_OPTS_PUTS("test_dummy_encryption"); 21512adf6da8STheodore Ts'o 21522adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 21532adf6da8STheodore Ts'o return 0; 21542adf6da8STheodore Ts'o } 21552adf6da8STheodore Ts'o 215666acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 215766acdcf4STheodore Ts'o { 215866acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 215966acdcf4STheodore Ts'o } 216066acdcf4STheodore Ts'o 2161ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 216266acdcf4STheodore Ts'o { 216366acdcf4STheodore Ts'o struct super_block *sb = seq->private; 216466acdcf4STheodore Ts'o int rc; 216566acdcf4STheodore Ts'o 2166bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 216766acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 216866acdcf4STheodore Ts'o seq_puts(seq, "\n"); 216966acdcf4STheodore Ts'o return rc; 217066acdcf4STheodore Ts'o } 217166acdcf4STheodore Ts'o 2172617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 2173ac27a0ecSDave Kleikamp int read_only) 2174ac27a0ecSDave Kleikamp { 2175617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2176c89128a0SJaegeuk Kim int err = 0; 2177ac27a0ecSDave Kleikamp 2178617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 2179b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 2180b31e1552SEric Sandeen "forcing read-only mode"); 2181c89128a0SJaegeuk Kim err = -EROFS; 2182ac27a0ecSDave Kleikamp } 2183ac27a0ecSDave Kleikamp if (read_only) 2184281b5995STheodore Ts'o goto done; 2185617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 2186b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 2187b31e1552SEric Sandeen "running e2fsck is recommended"); 2188c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 2189b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2190b31e1552SEric Sandeen "warning: mounting fs with errors, " 2191b31e1552SEric Sandeen "running e2fsck is recommended"); 2192ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 2193ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 2194ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 2195b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2196b31e1552SEric Sandeen "warning: maximal mount count reached, " 2197b31e1552SEric Sandeen "running e2fsck is recommended"); 2198ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 21996a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 22006a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 2201b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2202b31e1552SEric Sandeen "warning: checktime reached, " 2203b31e1552SEric Sandeen "running e2fsck is recommended"); 22040390131bSFrank Mayhar if (!sbi->s_journal) 2205216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 2206ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 2207617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 2208e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 22096a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 2210617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 22110390131bSFrank Mayhar if (sbi->s_journal) 2212e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 2213ac27a0ecSDave Kleikamp 2214c89128a0SJaegeuk Kim err = ext4_commit_super(sb, 1); 2215281b5995STheodore Ts'o done: 2216ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2217a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2218a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2219ac27a0ecSDave Kleikamp sb->s_blocksize, 2220ac27a0ecSDave Kleikamp sbi->s_groups_count, 2221617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2222617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2223a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2224ac27a0ecSDave Kleikamp 22257abc52c2SDan Magenheimer cleancache_init_fs(sb); 2226c89128a0SJaegeuk Kim return err; 2227ac27a0ecSDave Kleikamp } 2228ac27a0ecSDave Kleikamp 2229117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 2230117fff10STheodore Ts'o { 2231117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 2232117fff10STheodore Ts'o struct flex_groups *new_groups; 2233117fff10STheodore Ts'o int size; 2234117fff10STheodore Ts'o 2235117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 2236117fff10STheodore Ts'o return 0; 2237117fff10STheodore Ts'o 2238117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 2239117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 2240117fff10STheodore Ts'o return 0; 2241117fff10STheodore Ts'o 2242117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 2243a7c3e901SMichal Hocko new_groups = kvzalloc(size, GFP_KERNEL); 2244117fff10STheodore Ts'o if (!new_groups) { 2245117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 2246117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 2247117fff10STheodore Ts'o return -ENOMEM; 2248117fff10STheodore Ts'o } 2249117fff10STheodore Ts'o 2250117fff10STheodore Ts'o if (sbi->s_flex_groups) { 2251117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 2252117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 2253117fff10STheodore Ts'o sizeof(struct flex_groups))); 2254b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 2255117fff10STheodore Ts'o } 2256117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 2257117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 2258117fff10STheodore Ts'o return 0; 2259117fff10STheodore Ts'o } 2260117fff10STheodore Ts'o 2261772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2262772cb7c8SJose R. Santos { 2263772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2264772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 2265772cb7c8SJose R. Santos ext4_group_t flex_group; 2266117fff10STheodore Ts'o int i, err; 2267772cb7c8SJose R. Santos 2268503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2269d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2270772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2271772cb7c8SJose R. Santos return 1; 2272772cb7c8SJose R. Santos } 2273772cb7c8SJose R. Santos 2274117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2275117fff10STheodore Ts'o if (err) 2276772cb7c8SJose R. Santos goto failed; 2277772cb7c8SJose R. Santos 2278772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 227988b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2280772cb7c8SJose R. Santos 2281772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 22827ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 22837ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 228490ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 228524aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 22867ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 22877ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2288772cb7c8SJose R. Santos } 2289772cb7c8SJose R. Santos 2290772cb7c8SJose R. Santos return 1; 2291772cb7c8SJose R. Santos failed: 2292772cb7c8SJose R. Santos return 0; 2293772cb7c8SJose R. Santos } 2294772cb7c8SJose R. Santos 2295e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2296717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2297717d50e4SAndreas Dilger { 2298b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 2299717d50e4SAndreas Dilger __u16 crc = 0; 2300717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2301e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 2302717d50e4SAndreas Dilger 23039aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2304feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2305feb0ab32SDarrick J. Wong __u32 csum32; 2306b47820edSDaeho Jeong __u16 dummy_csum = 0; 2307feb0ab32SDarrick J. Wong 2308feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2309feb0ab32SDarrick J. Wong sizeof(le_group)); 2310b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 2311b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 2312b47820edSDaeho Jeong sizeof(dummy_csum)); 2313b47820edSDaeho Jeong offset += sizeof(dummy_csum); 2314b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 2315b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 2316b47820edSDaeho Jeong sbi->s_desc_size - offset); 2317feb0ab32SDarrick J. Wong 2318feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2319feb0ab32SDarrick J. Wong goto out; 2320feb0ab32SDarrick J. Wong } 2321feb0ab32SDarrick J. Wong 2322feb0ab32SDarrick J. Wong /* old crc16 code */ 2323e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 2324813d32f9SDarrick J. Wong return 0; 2325813d32f9SDarrick J. Wong 2326717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2327717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2328717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2329717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2330717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2331e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 2332717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2333717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2334717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2335717d50e4SAndreas Dilger offset); 2336717d50e4SAndreas Dilger 2337feb0ab32SDarrick J. Wong out: 2338717d50e4SAndreas Dilger return cpu_to_le16(crc); 2339717d50e4SAndreas Dilger } 2340717d50e4SAndreas Dilger 2341feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2342717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2343717d50e4SAndreas Dilger { 2344feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2345e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 2346717d50e4SAndreas Dilger return 0; 2347717d50e4SAndreas Dilger 2348717d50e4SAndreas Dilger return 1; 2349717d50e4SAndreas Dilger } 2350717d50e4SAndreas Dilger 2351feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2352feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2353feb0ab32SDarrick J. Wong { 2354feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2355feb0ab32SDarrick J. Wong return; 2356e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 2357feb0ab32SDarrick J. Wong } 2358feb0ab32SDarrick J. Wong 2359ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2360bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2361829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 2362bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2363ac27a0ecSDave Kleikamp { 2364617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2365617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2366617ba13bSMingming Cao ext4_fsblk_t last_block; 236744de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 2368bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2369bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2370bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2371ce421581SJose R. Santos int flexbg_flag = 0; 2372bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2373ac27a0ecSDave Kleikamp 2374e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 2375ce421581SJose R. Santos flexbg_flag = 1; 2376ce421581SJose R. Santos 2377617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2378ac27a0ecSDave Kleikamp 2379197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2380197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2381197cd65aSAkinobu Mita 2382ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2383bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2384ac27a0ecSDave Kleikamp else 2385ac27a0ecSDave Kleikamp last_block = first_block + 2386617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2387ac27a0ecSDave Kleikamp 2388bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2389bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2390bfff6873SLukas Czerner grp = i; 2391bfff6873SLukas Czerner 23928fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 2393829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 2394829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2395829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 2396829fa70dSTheodore Ts'o "superblock", i); 239718db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 239818db4b4eSTheodore Ts'o return 0; 2399829fa70dSTheodore Ts'o } 240077260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 240177260807STheodore Ts'o block_bitmap <= last_bg_block) { 240277260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 240377260807STheodore Ts'o "Block bitmap for group %u overlaps " 240477260807STheodore Ts'o "block group descriptors", i); 240577260807STheodore Ts'o if (!sb_rdonly(sb)) 240677260807STheodore Ts'o return 0; 240777260807STheodore Ts'o } 24082b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2409b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2410a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2411b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2412ac27a0ecSDave Kleikamp return 0; 2413ac27a0ecSDave Kleikamp } 24148fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 2415829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 2416829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2417829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 2418829fa70dSTheodore Ts'o "superblock", i); 241918db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 242018db4b4eSTheodore Ts'o return 0; 2421829fa70dSTheodore Ts'o } 242277260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 242377260807STheodore Ts'o inode_bitmap <= last_bg_block) { 242477260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 242577260807STheodore Ts'o "Inode bitmap for group %u overlaps " 242677260807STheodore Ts'o "block group descriptors", i); 242777260807STheodore Ts'o if (!sb_rdonly(sb)) 242877260807STheodore Ts'o return 0; 242977260807STheodore Ts'o } 24302b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2431b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2432a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2433b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2434ac27a0ecSDave Kleikamp return 0; 2435ac27a0ecSDave Kleikamp } 24368fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2437829fa70dSTheodore Ts'o if (inode_table == sb_block) { 2438829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2439829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 2440829fa70dSTheodore Ts'o "superblock", i); 244118db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 244218db4b4eSTheodore Ts'o return 0; 2443829fa70dSTheodore Ts'o } 244477260807STheodore Ts'o if (inode_table >= sb_block + 1 && 244577260807STheodore Ts'o inode_table <= last_bg_block) { 244677260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 244777260807STheodore Ts'o "Inode table for group %u overlaps " 244877260807STheodore Ts'o "block group descriptors", i); 244977260807STheodore Ts'o if (!sb_rdonly(sb)) 245077260807STheodore Ts'o return 0; 245177260807STheodore Ts'o } 2452bd81d8eeSLaurent Vivier if (inode_table < first_block || 24532b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2454b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2455a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2456b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2457ac27a0ecSDave Kleikamp return 0; 2458ac27a0ecSDave Kleikamp } 2459955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2460feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2461b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2462b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2463e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 2464fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 2465bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 2466955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2467717d50e4SAndreas Dilger return 0; 2468717d50e4SAndreas Dilger } 24697ee1ec4cSLi Zefan } 2470955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2471ce421581SJose R. Santos if (!flexbg_flag) 2472617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2473ac27a0ecSDave Kleikamp } 2474bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2475bfff6873SLukas Czerner *first_not_zeroed = grp; 2476ac27a0ecSDave Kleikamp return 1; 2477ac27a0ecSDave Kleikamp } 2478ac27a0ecSDave Kleikamp 2479617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2480ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2481ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2482ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2483ac27a0ecSDave Kleikamp * 2484ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2485ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2486ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2487ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2488ac27a0ecSDave Kleikamp * 2489ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2490ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2491ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2492617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2493ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2494ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2495ac27a0ecSDave Kleikamp */ 2496617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2497617ba13bSMingming Cao struct ext4_super_block *es) 2498ac27a0ecSDave Kleikamp { 2499ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 25002c98eb5eSTheodore Ts'o int ret, nr_orphans = 0, nr_truncates = 0; 2501ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 250295f1fda4Szhangyi (F) int quota_update = 0; 2503ac27a0ecSDave Kleikamp int i; 2504ac27a0ecSDave Kleikamp #endif 2505ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2506ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2507ac27a0ecSDave Kleikamp return; 2508ac27a0ecSDave Kleikamp } 2509ac27a0ecSDave Kleikamp 2510a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2511b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2512b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2513a8f48a95SEric Sandeen return; 2514a8f48a95SEric Sandeen } 2515a8f48a95SEric Sandeen 2516d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2517d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2518d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2519d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2520d39195c3SAmir Goldstein return; 2521d39195c3SAmir Goldstein } 2522d39195c3SAmir Goldstein 2523617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2524c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 25251751e8a6SLinus Torvalds if (es->s_last_orphan && !(s_flags & SB_RDONLY)) { 252684474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2527ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2528ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2529c25f9bc6SEric Sandeen } 2530ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2531ac27a0ecSDave Kleikamp return; 2532ac27a0ecSDave Kleikamp } 2533ac27a0ecSDave Kleikamp 25341751e8a6SLinus Torvalds if (s_flags & SB_RDONLY) { 2535b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 25361751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 2537ac27a0ecSDave Kleikamp } 2538ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2539ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 25401751e8a6SLinus Torvalds sb->s_flags |= SB_ACTIVE; 254195f1fda4Szhangyi (F) 254295f1fda4Szhangyi (F) /* 254395f1fda4Szhangyi (F) * Turn on quotas which were not enabled for read-only mounts if 254495f1fda4Szhangyi (F) * filesystem has quota feature, so that they are updated correctly. 254595f1fda4Szhangyi (F) */ 25461751e8a6SLinus Torvalds if (ext4_has_feature_quota(sb) && (s_flags & SB_RDONLY)) { 254795f1fda4Szhangyi (F) int ret = ext4_enable_quotas(sb); 254895f1fda4Szhangyi (F) 254995f1fda4Szhangyi (F) if (!ret) 255095f1fda4Szhangyi (F) quota_update = 1; 255195f1fda4Szhangyi (F) else 255295f1fda4Szhangyi (F) ext4_msg(sb, KERN_ERR, 255395f1fda4Szhangyi (F) "Cannot turn on quotas: error %d", ret); 255495f1fda4Szhangyi (F) } 255595f1fda4Szhangyi (F) 255695f1fda4Szhangyi (F) /* Turn on journaled quotas used for old sytle */ 2557a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2558617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2559617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 256095f1fda4Szhangyi (F) 256195f1fda4Szhangyi (F) if (!ret) 256295f1fda4Szhangyi (F) quota_update = 1; 256395f1fda4Szhangyi (F) else 2564b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2565b31e1552SEric Sandeen "Cannot turn on journaled " 256695f1fda4Szhangyi (F) "quota: type %d: error %d", i, ret); 2567ac27a0ecSDave Kleikamp } 2568ac27a0ecSDave Kleikamp } 2569ac27a0ecSDave Kleikamp #endif 2570ac27a0ecSDave Kleikamp 2571ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2572ac27a0ecSDave Kleikamp struct inode *inode; 2573ac27a0ecSDave Kleikamp 2574c65d5c6cSVegard Nossum /* 2575c65d5c6cSVegard Nossum * We may have encountered an error during cleanup; if 2576c65d5c6cSVegard Nossum * so, skip the rest. 2577c65d5c6cSVegard Nossum */ 2578c65d5c6cSVegard Nossum if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2579c65d5c6cSVegard Nossum jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2580c65d5c6cSVegard Nossum es->s_last_orphan = 0; 2581c65d5c6cSVegard Nossum break; 2582c65d5c6cSVegard Nossum } 2583c65d5c6cSVegard Nossum 258497bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 258597bd42b9SJosef Bacik if (IS_ERR(inode)) { 2586ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2587ac27a0ecSDave Kleikamp break; 2588ac27a0ecSDave Kleikamp } 2589ac27a0ecSDave Kleikamp 2590617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2591871a2931SChristoph Hellwig dquot_initialize(inode); 2592ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2593566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2594b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2595b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 259646e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2597e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2598ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 25995955102cSAl Viro inode_lock(inode); 260055f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 26012c98eb5eSTheodore Ts'o ret = ext4_truncate(inode); 26022c98eb5eSTheodore Ts'o if (ret) 26032c98eb5eSTheodore Ts'o ext4_std_error(inode->i_sb, ret); 26045955102cSAl Viro inode_unlock(inode); 2605ac27a0ecSDave Kleikamp nr_truncates++; 2606ac27a0ecSDave Kleikamp } else { 2607566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2608b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2609b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 261046e665e9SHarvey Harrison __func__, inode->i_ino); 2611ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2612ac27a0ecSDave Kleikamp inode->i_ino); 2613ac27a0ecSDave Kleikamp nr_orphans++; 2614ac27a0ecSDave Kleikamp } 2615ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2616ac27a0ecSDave Kleikamp } 2617ac27a0ecSDave Kleikamp 2618ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2619ac27a0ecSDave Kleikamp 2620ac27a0ecSDave Kleikamp if (nr_orphans) 2621b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2622b31e1552SEric Sandeen PLURAL(nr_orphans)); 2623ac27a0ecSDave Kleikamp if (nr_truncates) 2624b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2625b31e1552SEric Sandeen PLURAL(nr_truncates)); 2626ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 262795f1fda4Szhangyi (F) /* Turn off quotas if they were enabled for orphan cleanup */ 262895f1fda4Szhangyi (F) if (quota_update) { 2629a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 263095f1fda4Szhangyi (F) if (sb_dqopt(sb)->files[i]) 2631287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2632ac27a0ecSDave Kleikamp } 263395f1fda4Szhangyi (F) } 2634ac27a0ecSDave Kleikamp #endif 26351751e8a6SLinus Torvalds sb->s_flags = s_flags; /* Restore SB_RDONLY status */ 2636ac27a0ecSDave Kleikamp } 26370b8e58a1SAndreas Dilger 2638cd2291a4SEric Sandeen /* 2639cd2291a4SEric Sandeen * Maximal extent format file size. 2640cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2641cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2642cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2643cd2291a4SEric Sandeen * so that won't be a limiting factor. 2644cd2291a4SEric Sandeen * 2645f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2646f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2647f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2648f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2649f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2650f17722f9SLukas Czerner * 2651cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2652cd2291a4SEric Sandeen */ 2653f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2654cd2291a4SEric Sandeen { 2655cd2291a4SEric Sandeen loff_t res; 2656cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2657cd2291a4SEric Sandeen 2658cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2659f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2660cd2291a4SEric Sandeen /* 266190c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2662cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2663cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2664cd2291a4SEric Sandeen */ 2665cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2666cd2291a4SEric Sandeen 2667cd2291a4SEric Sandeen /* total blocks in file system block size */ 2668cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2669cd2291a4SEric Sandeen upper_limit <<= blkbits; 2670cd2291a4SEric Sandeen } 2671cd2291a4SEric Sandeen 2672f17722f9SLukas Czerner /* 2673f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2674f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2675f17722f9SLukas Czerner * size 2676f17722f9SLukas Czerner */ 2677f17722f9SLukas Czerner res = (1LL << 32) - 1; 2678cd2291a4SEric Sandeen res <<= blkbits; 2679cd2291a4SEric Sandeen 2680cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2681cd2291a4SEric Sandeen if (res > upper_limit) 2682cd2291a4SEric Sandeen res = upper_limit; 2683cd2291a4SEric Sandeen 2684cd2291a4SEric Sandeen return res; 2685cd2291a4SEric Sandeen } 2686ac27a0ecSDave Kleikamp 2687ac27a0ecSDave Kleikamp /* 2688cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 26890fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 26900fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2691ac27a0ecSDave Kleikamp */ 2692f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2693ac27a0ecSDave Kleikamp { 2694617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 26950fc1b451SAneesh Kumar K.V int meta_blocks; 26960fc1b451SAneesh Kumar K.V loff_t upper_limit; 26970b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 26980b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 26990b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 27000b8e58a1SAndreas Dilger * 27010b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 27020b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 27030fc1b451SAneesh Kumar K.V */ 27040fc1b451SAneesh Kumar K.V 2705f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 27060fc1b451SAneesh Kumar K.V /* 270790c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 27080b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 27090b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 27100fc1b451SAneesh Kumar K.V */ 27110fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 27120fc1b451SAneesh Kumar K.V 27130fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 27140fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 27150fc1b451SAneesh Kumar K.V 27160fc1b451SAneesh Kumar K.V } else { 27178180a562SAneesh Kumar K.V /* 27188180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 27198180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 27208180a562SAneesh Kumar K.V * represent total number of blocks in 27218180a562SAneesh Kumar K.V * file system block size 27228180a562SAneesh Kumar K.V */ 27230fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 27240fc1b451SAneesh Kumar K.V 27250fc1b451SAneesh Kumar K.V } 27260fc1b451SAneesh Kumar K.V 27270fc1b451SAneesh Kumar K.V /* indirect blocks */ 27280fc1b451SAneesh Kumar K.V meta_blocks = 1; 27290fc1b451SAneesh Kumar K.V /* double indirect blocks */ 27300fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 27310fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 27320fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 27330fc1b451SAneesh Kumar K.V 27340fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 27350fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2736ac27a0ecSDave Kleikamp 2737ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2738ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2739ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2740ac27a0ecSDave Kleikamp res <<= bits; 2741ac27a0ecSDave Kleikamp if (res > upper_limit) 2742ac27a0ecSDave Kleikamp res = upper_limit; 27430fc1b451SAneesh Kumar K.V 27440fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 27450fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 27460fc1b451SAneesh Kumar K.V 2747ac27a0ecSDave Kleikamp return res; 2748ac27a0ecSDave Kleikamp } 2749ac27a0ecSDave Kleikamp 2750617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 275170bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2752ac27a0ecSDave Kleikamp { 2753617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2754fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2755ac27a0ecSDave Kleikamp int has_super = 0; 2756ac27a0ecSDave Kleikamp 2757ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2758ac27a0ecSDave Kleikamp 2759e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 276070bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2761ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2762617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2763ac27a0ecSDave Kleikamp has_super = 1; 27640b8e58a1SAndreas Dilger 2765bd63f6b0SDarrick J. Wong /* 2766bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2767bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2768bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2769bd63f6b0SDarrick J. Wong * compensate. 2770bd63f6b0SDarrick J. Wong */ 2771bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 277249598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 2773bd63f6b0SDarrick J. Wong has_super++; 2774bd63f6b0SDarrick J. Wong 2775617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2776ac27a0ecSDave Kleikamp } 2777ac27a0ecSDave Kleikamp 2778c9de560dSAlex Tomas /** 2779c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2780c9de560dSAlex Tomas * @sbi: In memory super block info 2781c9de560dSAlex Tomas * 2782c9de560dSAlex Tomas * If we have specified it via mount option, then 2783c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2784c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2785c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2786c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2787c9de560dSAlex Tomas * 2788c9de560dSAlex Tomas */ 2789c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2790c9de560dSAlex Tomas { 2791c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2792c9de560dSAlex Tomas unsigned long stripe_width = 2793c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 27943eb08658SDan Ehrenberg int ret; 2795c9de560dSAlex Tomas 2796c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 27973eb08658SDan Ehrenberg ret = sbi->s_stripe; 27985469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 27993eb08658SDan Ehrenberg ret = stripe_width; 28005469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 28013eb08658SDan Ehrenberg ret = stride; 28023eb08658SDan Ehrenberg else 28033eb08658SDan Ehrenberg ret = 0; 2804c9de560dSAlex Tomas 28053eb08658SDan Ehrenberg /* 28063eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 28073eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 28083eb08658SDan Ehrenberg */ 28093eb08658SDan Ehrenberg if (ret <= 1) 28103eb08658SDan Ehrenberg ret = 0; 2811c9de560dSAlex Tomas 28123eb08658SDan Ehrenberg return ret; 2813c9de560dSAlex Tomas } 2814ac27a0ecSDave Kleikamp 2815a13fb1a4SEric Sandeen /* 2816a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2817a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2818a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2819a13fb1a4SEric Sandeen * 0 if it cannot be. 2820a13fb1a4SEric Sandeen */ 2821a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2822a13fb1a4SEric Sandeen { 2823e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 2824a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2825a13fb1a4SEric Sandeen "Couldn't mount because of " 2826a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2827a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2828a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2829a13fb1a4SEric Sandeen return 0; 2830a13fb1a4SEric Sandeen } 2831a13fb1a4SEric Sandeen 2832a13fb1a4SEric Sandeen if (readonly) 2833a13fb1a4SEric Sandeen return 1; 2834a13fb1a4SEric Sandeen 2835e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 28362cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 28371751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 28382cb5cc8bSDarrick J. Wong return 1; 28392cb5cc8bSDarrick J. Wong } 28402cb5cc8bSDarrick J. Wong 2841a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2842e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 2843a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2844a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2845a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2846a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2847a13fb1a4SEric Sandeen return 0; 2848a13fb1a4SEric Sandeen } 2849a13fb1a4SEric Sandeen /* 2850a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2851a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2852a13fb1a4SEric Sandeen */ 2853e2b911c5SDarrick J. Wong if (ext4_has_feature_huge_file(sb)) { 2854a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2855a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2856a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2857a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2858a13fb1a4SEric Sandeen return 0; 2859a13fb1a4SEric Sandeen } 2860a13fb1a4SEric Sandeen } 2861e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 2862bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2863bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2864bab08ab9STheodore Ts'o "extents feature\n"); 2865bab08ab9STheodore Ts'o return 0; 2866bab08ab9STheodore Ts'o } 28677c319d32SAditya Kali 28687c319d32SAditya Kali #ifndef CONFIG_QUOTA 2869e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !readonly) { 28707c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 28717c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 28727c319d32SAditya Kali "without CONFIG_QUOTA"); 28737c319d32SAditya Kali return 0; 28747c319d32SAditya Kali } 2875689c958cSLi Xi if (ext4_has_feature_project(sb) && !readonly) { 2876689c958cSLi Xi ext4_msg(sb, KERN_ERR, 2877689c958cSLi Xi "Filesystem with project quota feature cannot be mounted RDWR " 2878689c958cSLi Xi "without CONFIG_QUOTA"); 2879689c958cSLi Xi return 0; 2880689c958cSLi Xi } 28817c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2882a13fb1a4SEric Sandeen return 1; 2883a13fb1a4SEric Sandeen } 2884a13fb1a4SEric Sandeen 288566e61a9eSTheodore Ts'o /* 288666e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 288766e61a9eSTheodore Ts'o * on the file system 288866e61a9eSTheodore Ts'o */ 2889235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 289066e61a9eSTheodore Ts'o { 2891235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 2892235699a8SKees Cook struct super_block *sb = sbi->s_sb; 2893235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 289466e61a9eSTheodore Ts'o 289566e61a9eSTheodore Ts'o if (es->s_error_count) 2896ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2897ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 289866e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 289966e61a9eSTheodore Ts'o if (es->s_first_error_time) { 29006a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 29016a0678a7SArnd Bergmann sb->s_id, 29026a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 290366e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 290466e61a9eSTheodore Ts'o es->s_first_error_func, 290566e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 290666e61a9eSTheodore Ts'o if (es->s_first_error_ino) 2907651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 290866e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 290966e61a9eSTheodore Ts'o if (es->s_first_error_block) 2910651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 291166e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 2912651e1c3bSJoe Perches printk(KERN_CONT "\n"); 291366e61a9eSTheodore Ts'o } 291466e61a9eSTheodore Ts'o if (es->s_last_error_time) { 29156a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 29166a0678a7SArnd Bergmann sb->s_id, 29176a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 291866e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 291966e61a9eSTheodore Ts'o es->s_last_error_func, 292066e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 292166e61a9eSTheodore Ts'o if (es->s_last_error_ino) 2922651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 292366e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 292466e61a9eSTheodore Ts'o if (es->s_last_error_block) 2925651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 292666e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 2927651e1c3bSJoe Perches printk(KERN_CONT "\n"); 292866e61a9eSTheodore Ts'o } 292966e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 293066e61a9eSTheodore Ts'o } 293166e61a9eSTheodore Ts'o 2932bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2933bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2934bfff6873SLukas Czerner { 2935bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2936bfff6873SLukas Czerner ext4_group_t group, ngroups; 2937bfff6873SLukas Czerner struct super_block *sb; 2938bfff6873SLukas Czerner unsigned long timeout = 0; 2939bfff6873SLukas Czerner int ret = 0; 2940bfff6873SLukas Czerner 2941bfff6873SLukas Czerner sb = elr->lr_super; 2942bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2943bfff6873SLukas Czerner 2944bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2945bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2946bfff6873SLukas Czerner if (!gdp) { 2947bfff6873SLukas Czerner ret = 1; 2948bfff6873SLukas Czerner break; 2949bfff6873SLukas Czerner } 2950bfff6873SLukas Czerner 2951bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2952bfff6873SLukas Czerner break; 2953bfff6873SLukas Czerner } 2954bfff6873SLukas Czerner 29557f511862STheodore Ts'o if (group >= ngroups) 2956bfff6873SLukas Czerner ret = 1; 2957bfff6873SLukas Czerner 2958bfff6873SLukas Czerner if (!ret) { 2959bfff6873SLukas Czerner timeout = jiffies; 2960bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2961bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2962bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 296351ce6511SLukas Czerner timeout = (jiffies - timeout) * 296451ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2965bfff6873SLukas Czerner elr->lr_timeout = timeout; 2966bfff6873SLukas Czerner } 2967bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2968bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2969bfff6873SLukas Czerner } 2970bfff6873SLukas Czerner return ret; 2971bfff6873SLukas Czerner } 2972bfff6873SLukas Czerner 2973bfff6873SLukas Czerner /* 2974bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 29754ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2976bfff6873SLukas Czerner */ 2977bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2978bfff6873SLukas Czerner { 2979bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2980bfff6873SLukas Czerner 2981bfff6873SLukas Czerner if (!elr) 2982bfff6873SLukas Czerner return; 2983bfff6873SLukas Czerner 2984bfff6873SLukas Czerner sbi = elr->lr_sbi; 2985bfff6873SLukas Czerner 2986bfff6873SLukas Czerner list_del(&elr->lr_request); 2987bfff6873SLukas Czerner sbi->s_li_request = NULL; 2988bfff6873SLukas Czerner kfree(elr); 2989bfff6873SLukas Czerner } 2990bfff6873SLukas Czerner 2991bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2992bfff6873SLukas Czerner { 29931bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 29941bb933fbSLukas Czerner if (!ext4_li_info) { 29951bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2996bfff6873SLukas Czerner return; 29971bb933fbSLukas Czerner } 2998bfff6873SLukas Czerner 2999bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 30001bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3001bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 30021bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3003bfff6873SLukas Czerner } 3004bfff6873SLukas Czerner 30058f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 30068f1f7453SEric Sandeen 3007bfff6873SLukas Czerner /* 3008bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3009bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3010bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3011bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3012bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3013bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3014bfff6873SLukas Czerner * next waking time and put itself into sleep. 3015bfff6873SLukas Czerner */ 3016bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3017bfff6873SLukas Czerner { 3018bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 3019bfff6873SLukas Czerner struct list_head *pos, *n; 3020bfff6873SLukas Czerner struct ext4_li_request *elr; 30214ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3022bfff6873SLukas Czerner 3023bfff6873SLukas Czerner BUG_ON(NULL == eli); 3024bfff6873SLukas Czerner 3025bfff6873SLukas Czerner cont_thread: 3026bfff6873SLukas Czerner while (true) { 3027bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3028bfff6873SLukas Czerner 3029bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3030bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3031bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3032bfff6873SLukas Czerner goto exit_thread; 3033bfff6873SLukas Czerner } 3034bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3035e22834f0SDmitry Monakhov int err = 0; 3036e22834f0SDmitry Monakhov int progress = 0; 3037bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3038bfff6873SLukas Czerner lr_request); 3039bfff6873SLukas Czerner 3040e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3041e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3042e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3043e22834f0SDmitry Monakhov continue; 3044e22834f0SDmitry Monakhov } 3045e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3046e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3047e22834f0SDmitry Monakhov progress = 1; 3048e22834f0SDmitry Monakhov /* 3049e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3050e22834f0SDmitry Monakhov * be removed from the list, it is 3051e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3052e22834f0SDmitry Monakhov */ 3053e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3054e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3055e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3056e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3057e22834f0SDmitry Monakhov n = pos->next; 3058e22834f0SDmitry Monakhov } 3059e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3060e22834f0SDmitry Monakhov } 3061b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3062e22834f0SDmitry Monakhov if (err) { 3063bfff6873SLukas Czerner ext4_remove_li_request(elr); 3064bfff6873SLukas Czerner continue; 3065bfff6873SLukas Czerner } 3066e22834f0SDmitry Monakhov if (!progress) { 3067e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3068e22834f0SDmitry Monakhov (prandom_u32() 3069e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3070b2c78cd0STheodore Ts'o } 3071bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3072bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3073bfff6873SLukas Czerner } 3074bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3075bfff6873SLukas Czerner 3076a0acae0eSTejun Heo try_to_freeze(); 3077bfff6873SLukas Czerner 30784ed5c033SLukas Czerner cur = jiffies; 30794ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3080f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3081bfff6873SLukas Czerner cond_resched(); 3082bfff6873SLukas Czerner continue; 3083bfff6873SLukas Czerner } 3084bfff6873SLukas Czerner 30854ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 30864ed5c033SLukas Czerner 30878f1f7453SEric Sandeen if (kthread_should_stop()) { 30888f1f7453SEric Sandeen ext4_clear_request_list(); 30898f1f7453SEric Sandeen goto exit_thread; 30908f1f7453SEric Sandeen } 3091bfff6873SLukas Czerner } 3092bfff6873SLukas Czerner 3093bfff6873SLukas Czerner exit_thread: 3094bfff6873SLukas Czerner /* 3095bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3096bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3097bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3098bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3099bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3100bfff6873SLukas Czerner * new one. 3101bfff6873SLukas Czerner */ 3102bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3103bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3104bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3105bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3106bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3107bfff6873SLukas Czerner goto cont_thread; 3108bfff6873SLukas Czerner } 3109bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3110bfff6873SLukas Czerner kfree(ext4_li_info); 3111bfff6873SLukas Czerner ext4_li_info = NULL; 3112bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3113bfff6873SLukas Czerner 3114bfff6873SLukas Czerner return 0; 3115bfff6873SLukas Czerner } 3116bfff6873SLukas Czerner 3117bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3118bfff6873SLukas Czerner { 3119bfff6873SLukas Czerner struct list_head *pos, *n; 3120bfff6873SLukas Czerner struct ext4_li_request *elr; 3121bfff6873SLukas Czerner 3122bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3123bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3124bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3125bfff6873SLukas Czerner lr_request); 3126bfff6873SLukas Czerner ext4_remove_li_request(elr); 3127bfff6873SLukas Czerner } 3128bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3129bfff6873SLukas Czerner } 3130bfff6873SLukas Czerner 3131bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3132bfff6873SLukas Czerner { 31338f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 31348f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 31358f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 31368f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3137bfff6873SLukas Czerner ext4_clear_request_list(); 3138bfff6873SLukas Czerner kfree(ext4_li_info); 3139bfff6873SLukas Czerner ext4_li_info = NULL; 314092b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3141bfff6873SLukas Czerner "initialization thread\n", 3142bfff6873SLukas Czerner err); 3143bfff6873SLukas Czerner return err; 3144bfff6873SLukas Czerner } 3145bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3146bfff6873SLukas Czerner return 0; 3147bfff6873SLukas Czerner } 3148bfff6873SLukas Czerner 3149bfff6873SLukas Czerner /* 3150bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3151bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3152bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3153bfff6873SLukas Czerner * groups and return total number of groups. 3154bfff6873SLukas Czerner */ 3155bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3156bfff6873SLukas Czerner { 3157bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3158bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3159bfff6873SLukas Czerner 31608844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 31618844618dSTheodore Ts'o return ngroups; 31628844618dSTheodore Ts'o 3163bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3164bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3165bfff6873SLukas Czerner if (!gdp) 3166bfff6873SLukas Czerner continue; 3167bfff6873SLukas Czerner 316850122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3169bfff6873SLukas Czerner break; 3170bfff6873SLukas Czerner } 3171bfff6873SLukas Czerner 3172bfff6873SLukas Czerner return group; 3173bfff6873SLukas Czerner } 3174bfff6873SLukas Czerner 3175bfff6873SLukas Czerner static int ext4_li_info_new(void) 3176bfff6873SLukas Czerner { 3177bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3178bfff6873SLukas Czerner 3179bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3180bfff6873SLukas Czerner if (!eli) 3181bfff6873SLukas Czerner return -ENOMEM; 3182bfff6873SLukas Czerner 3183bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3184bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3185bfff6873SLukas Czerner 3186bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3187bfff6873SLukas Czerner 3188bfff6873SLukas Czerner ext4_li_info = eli; 3189bfff6873SLukas Czerner 3190bfff6873SLukas Czerner return 0; 3191bfff6873SLukas Czerner } 3192bfff6873SLukas Czerner 3193bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3194bfff6873SLukas Czerner ext4_group_t start) 3195bfff6873SLukas Czerner { 3196bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3197bfff6873SLukas Czerner struct ext4_li_request *elr; 3198bfff6873SLukas Czerner 3199bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3200bfff6873SLukas Czerner if (!elr) 3201bfff6873SLukas Czerner return NULL; 3202bfff6873SLukas Czerner 3203bfff6873SLukas Czerner elr->lr_super = sb; 3204bfff6873SLukas Czerner elr->lr_sbi = sbi; 3205bfff6873SLukas Czerner elr->lr_next_group = start; 3206bfff6873SLukas Czerner 3207bfff6873SLukas Czerner /* 3208bfff6873SLukas Czerner * Randomize first schedule time of the request to 3209bfff6873SLukas Czerner * spread the inode table initialization requests 3210bfff6873SLukas Czerner * better. 3211bfff6873SLukas Czerner */ 3212dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3213dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3214bfff6873SLukas Czerner return elr; 3215bfff6873SLukas Czerner } 3216bfff6873SLukas Czerner 32177f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3218bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3219bfff6873SLukas Czerner { 3220bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 32217f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 322249598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 32236c5a6cb9SAndrew Morton int ret = 0; 3224bfff6873SLukas Czerner 32257f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 322651ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 322751ce6511SLukas Czerner /* 322851ce6511SLukas Czerner * Reset timeout so it can be computed again, because 322951ce6511SLukas Czerner * s_li_wait_mult might have changed. 323051ce6511SLukas Czerner */ 323151ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 32327f511862STheodore Ts'o goto out; 323351ce6511SLukas Czerner } 3234bfff6873SLukas Czerner 3235bc98a42cSDavid Howells if (first_not_zeroed == ngroups || sb_rdonly(sb) || 323655ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 32377f511862STheodore Ts'o goto out; 3238bfff6873SLukas Czerner 3239bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 32407f511862STheodore Ts'o if (!elr) { 32417f511862STheodore Ts'o ret = -ENOMEM; 32427f511862STheodore Ts'o goto out; 32437f511862STheodore Ts'o } 3244bfff6873SLukas Czerner 3245bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3246bfff6873SLukas Czerner ret = ext4_li_info_new(); 3247bfff6873SLukas Czerner if (ret) 3248bfff6873SLukas Czerner goto out; 3249bfff6873SLukas Czerner } 3250bfff6873SLukas Czerner 3251bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3252bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3253bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3254bfff6873SLukas Czerner 3255bfff6873SLukas Czerner sbi->s_li_request = elr; 325646e4690bSTao Ma /* 325746e4690bSTao Ma * set elr to NULL here since it has been inserted to 325846e4690bSTao Ma * the request_list and the removal and free of it is 325946e4690bSTao Ma * handled by ext4_clear_request_list from now on. 326046e4690bSTao Ma */ 326146e4690bSTao Ma elr = NULL; 3262bfff6873SLukas Czerner 3263bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3264bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3265bfff6873SLukas Czerner if (ret) 3266bfff6873SLukas Czerner goto out; 3267bfff6873SLukas Czerner } 3268bfff6873SLukas Czerner out: 3269bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3270beed5ecbSNicolas Kaiser if (ret) 3271bfff6873SLukas Czerner kfree(elr); 3272bfff6873SLukas Czerner return ret; 3273bfff6873SLukas Czerner } 3274bfff6873SLukas Czerner 3275bfff6873SLukas Czerner /* 3276bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3277bfff6873SLukas Czerner * module unload. 3278bfff6873SLukas Czerner */ 3279bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3280bfff6873SLukas Czerner { 3281bfff6873SLukas Czerner /* 3282bfff6873SLukas Czerner * If thread exited earlier 3283bfff6873SLukas Czerner * there's nothing to be done. 3284bfff6873SLukas Czerner */ 32858f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3286bfff6873SLukas Czerner return; 3287bfff6873SLukas Czerner 32888f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3289bfff6873SLukas Czerner } 3290bfff6873SLukas Czerner 329125ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 329225ed6e8aSDarrick J. Wong { 329325ed6e8aSDarrick J. Wong int ret = 1; 329425ed6e8aSDarrick J. Wong int compat, incompat; 329525ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 329625ed6e8aSDarrick J. Wong 32979aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3298db9ee220SDarrick J. Wong /* journal checksum v3 */ 329925ed6e8aSDarrick J. Wong compat = 0; 3300db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 330125ed6e8aSDarrick J. Wong } else { 330225ed6e8aSDarrick J. Wong /* journal checksum v1 */ 330325ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 330425ed6e8aSDarrick J. Wong incompat = 0; 330525ed6e8aSDarrick J. Wong } 330625ed6e8aSDarrick J. Wong 3307feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3308feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3309feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3310feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 331125ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 331225ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 331325ed6e8aSDarrick J. Wong compat, 0, 331425ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 331525ed6e8aSDarrick J. Wong incompat); 331625ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 331725ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 331825ed6e8aSDarrick J. Wong compat, 0, 331925ed6e8aSDarrick J. Wong incompat); 332025ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 332125ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 332225ed6e8aSDarrick J. Wong } else { 3323feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3324feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 332525ed6e8aSDarrick J. Wong } 332625ed6e8aSDarrick J. Wong 332725ed6e8aSDarrick J. Wong return ret; 332825ed6e8aSDarrick J. Wong } 332925ed6e8aSDarrick J. Wong 3330952fc18eSTheodore Ts'o /* 3331952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3332952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3333952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3334952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3335952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3336952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3337952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3338952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3339952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3340952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3341952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3342952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3343952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3344952fc18eSTheodore Ts'o */ 3345952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3346952fc18eSTheodore Ts'o char *buf) 3347952fc18eSTheodore Ts'o { 3348952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3349952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3350952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3351952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3352952fc18eSTheodore Ts'o int s, j, count = 0; 3353952fc18eSTheodore Ts'o 3354e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 33550548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 33560548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 33570548bbb8STheodore Ts'o 3358952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3359952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3360952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3361952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3362952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3363952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3364952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3365952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3366952fc18eSTheodore Ts'o count++; 3367952fc18eSTheodore Ts'o } 3368952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3369952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3370952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3371952fc18eSTheodore Ts'o count++; 3372952fc18eSTheodore Ts'o } 3373952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3374952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3375952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3376952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3377952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3378952fc18eSTheodore Ts'o count++; 3379952fc18eSTheodore Ts'o } 3380952fc18eSTheodore Ts'o if (i != grp) 3381952fc18eSTheodore Ts'o continue; 3382952fc18eSTheodore Ts'o s = 0; 3383952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3384952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3385952fc18eSTheodore Ts'o count++; 3386952fc18eSTheodore Ts'o } 3387c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 3388c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 3389c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 3390c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 3391c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 3392952fc18eSTheodore Ts'o } 3393c48ae41bSTheodore Ts'o count += j; 3394c48ae41bSTheodore Ts'o for (; j > 0; j--) 3395c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3396952fc18eSTheodore Ts'o } 3397952fc18eSTheodore Ts'o if (!count) 3398952fc18eSTheodore Ts'o return 0; 3399952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3400952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3401952fc18eSTheodore Ts'o } 3402952fc18eSTheodore Ts'o 3403952fc18eSTheodore Ts'o /* 3404952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3405952fc18eSTheodore Ts'o */ 3406952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3407952fc18eSTheodore Ts'o { 3408952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3409952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 34103c816dedSEric Whitney struct inode *j_inode; 34113c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 3412952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3413952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 34144fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3415952fc18eSTheodore Ts'o 3416952fc18eSTheodore Ts'o if (!buf) 3417952fc18eSTheodore Ts'o return -ENOMEM; 3418952fc18eSTheodore Ts'o 3419952fc18eSTheodore Ts'o /* 3420952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3421952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3422952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3423952fc18eSTheodore Ts'o */ 3424952fc18eSTheodore Ts'o 3425952fc18eSTheodore Ts'o /* 3426952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3427952fc18eSTheodore Ts'o */ 3428952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3429952fc18eSTheodore Ts'o 3430952fc18eSTheodore Ts'o /* 3431952fc18eSTheodore Ts'o * Add the overhead found in each block group 3432952fc18eSTheodore Ts'o */ 3433952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3434952fc18eSTheodore Ts'o int blks; 3435952fc18eSTheodore Ts'o 3436952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3437952fc18eSTheodore Ts'o overhead += blks; 3438952fc18eSTheodore Ts'o if (blks) 3439952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3440952fc18eSTheodore Ts'o cond_resched(); 3441952fc18eSTheodore Ts'o } 34423c816dedSEric Whitney 34433c816dedSEric Whitney /* 34443c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 34453c816dedSEric Whitney * loaded or not 34463c816dedSEric Whitney */ 3447b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3448810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 34493c816dedSEric Whitney else if (ext4_has_feature_journal(sb) && !sbi->s_journal) { 34503c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 34513c816dedSEric Whitney if (j_inode) { 34523c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 34533c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 34543c816dedSEric Whitney iput(j_inode); 34553c816dedSEric Whitney } else { 34563c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 34573c816dedSEric Whitney } 34583c816dedSEric Whitney } 3459952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3460952fc18eSTheodore Ts'o smp_wmb(); 3461952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3462952fc18eSTheodore Ts'o return 0; 3463952fc18eSTheodore Ts'o } 3464952fc18eSTheodore Ts'o 3465b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 346627dd4385SLukas Czerner { 346727dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 3468b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 346927dd4385SLukas Czerner 347027dd4385SLukas Czerner /* 347130fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 347230fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 347330fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 347430fac0f7SJan Kara * to keep ext2/3 backward compatibility. 347530fac0f7SJan Kara */ 3476e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 3477b5799018STheodore Ts'o return; 347830fac0f7SJan Kara /* 347927dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 348027dd4385SLukas Czerner * This should cover the situations where we can not afford to run 348127dd4385SLukas Czerner * out of space like for example punch hole, or converting 3482556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 348327dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 348427dd4385SLukas Czerner * very rare. 348527dd4385SLukas Czerner */ 3486b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 3487b5799018STheodore Ts'o sbi->s_cluster_bits); 348827dd4385SLukas Czerner 348927dd4385SLukas Czerner do_div(resv_clusters, 50); 349027dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 349127dd4385SLukas Czerner 3492b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 349327dd4385SLukas Czerner } 349427dd4385SLukas Czerner 3495617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3496ac27a0ecSDave Kleikamp { 34975e405595SDan Williams struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev); 3498d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3499ac27a0ecSDave Kleikamp struct buffer_head *bh; 3500617ba13bSMingming Cao struct ext4_super_block *es = NULL; 35015aee0f8aSTheodore Ts'o struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3502617ba13bSMingming Cao ext4_fsblk_t block; 3503617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 350470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3505ac27a0ecSDave Kleikamp unsigned long offset = 0; 3506ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3507ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3508ac27a0ecSDave Kleikamp struct inode *root; 35090390131bSFrank Mayhar const char *descr; 3510dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3511281b5995STheodore Ts'o int blocksize, clustersize; 35124ec11028STheodore Ts'o unsigned int db_count; 35134ec11028STheodore Ts'o unsigned int i; 3514281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3515bd81d8eeSLaurent Vivier __u64 blocks_count; 351607aa2ea1SLukas Czerner int err = 0; 3517b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3518bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3519ac27a0ecSDave Kleikamp 35205aee0f8aSTheodore Ts'o if ((data && !orig_data) || !sbi) 35215aee0f8aSTheodore Ts'o goto out_free_base; 3522705895b6SPekka Enberg 3523aed9eb1bSColin Ian King sbi->s_daxdev = dax_dev; 3524705895b6SPekka Enberg sbi->s_blockgroup_lock = 3525705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 35265aee0f8aSTheodore Ts'o if (!sbi->s_blockgroup_lock) 35275aee0f8aSTheodore Ts'o goto out_free_base; 35285aee0f8aSTheodore Ts'o 3529ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 35302c0544b2STheodore Ts'o sbi->s_sb = sb; 3531240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3532d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3533f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3534f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3535dbae2c55SMichael Callahan part_stat_read(sb->s_bdev->bd_part, sectors[STAT_WRITE]); 3536ac27a0ecSDave Kleikamp 35379f6200bbSTheodore Ts'o /* Cleanup superblock name */ 3538ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 35399f6200bbSTheodore Ts'o 354007aa2ea1SLukas Czerner /* -EINVAL is default */ 3541dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3542617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3543ac27a0ecSDave Kleikamp if (!blocksize) { 3544b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3545ac27a0ecSDave Kleikamp goto out_fail; 3546ac27a0ecSDave Kleikamp } 3547ac27a0ecSDave Kleikamp 3548ac27a0ecSDave Kleikamp /* 3549617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3550ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3551ac27a0ecSDave Kleikamp */ 3552617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 355370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 355470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3555ac27a0ecSDave Kleikamp } else { 355670bbb3e0SAndrew Morton logical_sb_block = sb_block; 3557ac27a0ecSDave Kleikamp } 3558ac27a0ecSDave Kleikamp 3559a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3560b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3561ac27a0ecSDave Kleikamp goto out_fail; 3562ac27a0ecSDave Kleikamp } 3563ac27a0ecSDave Kleikamp /* 3564ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3565617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3566ac27a0ecSDave Kleikamp */ 35672716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3568ac27a0ecSDave Kleikamp sbi->s_es = es; 3569ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3570617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3571617ba13bSMingming Cao goto cantfind_ext4; 3572afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3573ac27a0ecSDave Kleikamp 3574feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3575e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 3576e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 3577363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3578feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3579feb0ab32SDarrick J. Wong 3580d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3581d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3582d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3583d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3584d25425f8SDarrick J. Wong silent = 1; 3585d25425f8SDarrick J. Wong goto cantfind_ext4; 3586d25425f8SDarrick J. Wong } 3587d25425f8SDarrick J. Wong 35880441984aSDarrick J. Wong /* Load the checksum driver */ 35890441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 35900441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 35910441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 35920441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 35930441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 35940441984aSDarrick J. Wong goto failed_mount; 35950441984aSDarrick J. Wong } 35960441984aSDarrick J. Wong 3597a9c47317SDarrick J. Wong /* Check superblock checksum */ 3598a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3599a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3600a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3601a9c47317SDarrick J. Wong silent = 1; 36026a797d27SDarrick J. Wong ret = -EFSBADCRC; 3603a9c47317SDarrick J. Wong goto cantfind_ext4; 3604a9c47317SDarrick J. Wong } 3605a9c47317SDarrick J. Wong 3606a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3607e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 36088c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 3609dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 3610a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3611a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3612a9c47317SDarrick J. Wong 3613ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3614ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3615fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3616617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3617fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 361887f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3619fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3620617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3621fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3622ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3623fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 362403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3625fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 36262e7842b8SHugh Dickins #endif 362798c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 362898c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 362998c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 363098c1a759SDarrick J. Wong 3631617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3632fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3633617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3634fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3635617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3636fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3637ac27a0ecSDave Kleikamp 3638617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3639fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3640bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3641fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3642bb4f397aSAneesh Kumar K.V else 3643fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 364445f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3645fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 36468b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3647fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3648ac27a0ecSDave Kleikamp 364908cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 365008cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 365130773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 365230773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 365330773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3654ac27a0ecSDave Kleikamp 36558b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3656fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3657ac27a0ecSDave Kleikamp 36581e2462f9SMingming Cao /* 3659dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3660dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3661dd919b98SAneesh Kumar K.V */ 3662bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 36638b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3664fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3665dd919b98SAneesh Kumar K.V 366651ce6511SLukas Czerner /* 366751ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 366851ce6511SLukas Czerner * no mount option specified. 366951ce6511SLukas Czerner */ 367051ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 367151ce6511SLukas Czerner 36725aee0f8aSTheodore Ts'o if (sbi->s_es->s_mount_opts[0]) { 36735aee0f8aSTheodore Ts'o char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 36745aee0f8aSTheodore Ts'o sizeof(sbi->s_es->s_mount_opts), 36755aee0f8aSTheodore Ts'o GFP_KERNEL); 36765aee0f8aSTheodore Ts'o if (!s_mount_opts) 36775aee0f8aSTheodore Ts'o goto failed_mount; 36785aee0f8aSTheodore Ts'o if (!parse_options(s_mount_opts, sb, &journal_devnum, 36795aee0f8aSTheodore Ts'o &journal_ioprio, 0)) { 36808b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 36818b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 36825aee0f8aSTheodore Ts'o s_mount_opts); 36835aee0f8aSTheodore Ts'o } 36845aee0f8aSTheodore Ts'o kfree(s_mount_opts); 36858b67f04aSTheodore Ts'o } 36865a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3687b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3688661aa520SEric Sandeen &journal_ioprio, 0)) 3689ac27a0ecSDave Kleikamp goto failed_mount; 3690ac27a0ecSDave Kleikamp 369156889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 369256889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 369356889787STheodore Ts'o "with data=journal disables delayed " 369456889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 369556889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 369656889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 369756889787STheodore Ts'o "both data=journal and delalloc"); 369856889787STheodore Ts'o goto failed_mount; 369956889787STheodore Ts'o } 370056889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 370156889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 37026ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 370356889787STheodore Ts'o goto failed_mount; 370456889787STheodore Ts'o } 3705923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 3706923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 3707923ae0ffSRoss Zwisler "both data=journal and dax"); 3708923ae0ffSRoss Zwisler goto failed_mount; 3709923ae0ffSRoss Zwisler } 371073b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 371173b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 371273b92a2aSSergey Karamov "encrypted files will use data=ordered " 371373b92a2aSSergey Karamov "instead of data journaling mode"); 371473b92a2aSSergey Karamov } 371556889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 371656889787STheodore Ts'o clear_opt(sb, DELALLOC); 3717001e4a87STejun Heo } else { 3718001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 371956889787STheodore Ts'o } 372056889787STheodore Ts'o 37211751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 37221751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 3723ac27a0ecSDave Kleikamp 3724617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3725e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 3726e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 3727e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 3728b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3729b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3730b31e1552SEric Sandeen "running e2fsck is recommended"); 3731469108ffSTheodore Tso 3732ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3733ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3734e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 3735ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3736ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3737ed3654ebSTheodore Ts'o goto failed_mount; 3738ed3654ebSTheodore Ts'o } 3739dec214d0STahsin Erdogan 3740dec214d0STahsin Erdogan /* 3741dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 3742dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 3743dec214d0STahsin Erdogan */ 3744dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 3745dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 3746dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 3747dec214d0STahsin Erdogan goto failed_mount; 3748dec214d0STahsin Erdogan } 3749ed3654ebSTheodore Ts'o } 3750ed3654ebSTheodore Ts'o 37512035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 37522035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 37532035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 37542035e776STheodore Ts'o "using the ext4 subsystem"); 37552035e776STheodore Ts'o else { 37560d9366d6SEric Sandeen /* 37570d9366d6SEric Sandeen * If we're probing be silent, if this looks like 37580d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 37590d9366d6SEric Sandeen */ 37600d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 37610d9366d6SEric Sandeen goto failed_mount; 37622035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 37632035e776STheodore Ts'o "to feature incompatibilities"); 37642035e776STheodore Ts'o goto failed_mount; 37652035e776STheodore Ts'o } 37662035e776STheodore Ts'o } 37672035e776STheodore Ts'o 37682035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 37692035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 37702035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 37712035e776STheodore Ts'o "using the ext4 subsystem"); 37722035e776STheodore Ts'o else { 37730d9366d6SEric Sandeen /* 37740d9366d6SEric Sandeen * If we're probing be silent, if this looks like 37750d9366d6SEric Sandeen * it's actually an ext4 filesystem. 37760d9366d6SEric Sandeen */ 37770d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 37780d9366d6SEric Sandeen goto failed_mount; 37792035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 37802035e776STheodore Ts'o "to feature incompatibilities"); 37812035e776STheodore Ts'o goto failed_mount; 37822035e776STheodore Ts'o } 37832035e776STheodore Ts'o } 37842035e776STheodore Ts'o 3785469108ffSTheodore Tso /* 3786ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3787ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3788ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3789ac27a0ecSDave Kleikamp */ 3790bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 3791ac27a0ecSDave Kleikamp goto failed_mount; 3792a13fb1a4SEric Sandeen 3793261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3794617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3795617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3796b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 37978cdf3372STheodore Ts'o "Unsupported filesystem blocksize %d (%d log_block_size)", 37988cdf3372STheodore Ts'o blocksize, le32_to_cpu(es->s_log_block_size)); 37998cdf3372STheodore Ts'o goto failed_mount; 38008cdf3372STheodore Ts'o } 38018cdf3372STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 38028cdf3372STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 38038cdf3372STheodore Ts'o ext4_msg(sb, KERN_ERR, 38048cdf3372STheodore Ts'o "Invalid log block size: %u", 38058cdf3372STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 3806ac27a0ecSDave Kleikamp goto failed_mount; 3807ac27a0ecSDave Kleikamp } 3808bfe0a5f4STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 3809bfe0a5f4STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 3810bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 3811bfe0a5f4STheodore Ts'o "Invalid log cluster size: %u", 3812bfe0a5f4STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 3813bfe0a5f4STheodore Ts'o goto failed_mount; 3814bfe0a5f4STheodore Ts'o } 3815ac27a0ecSDave Kleikamp 38165b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 38175b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 38185b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 38195b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 38205b9554dcSTheodore Ts'o goto failed_mount; 38215b9554dcSTheodore Ts'o } 38225b9554dcSTheodore Ts'o 3823923ae0ffSRoss Zwisler if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { 3824559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 3825559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 3826559db4c6SRoss Zwisler " that may contain inline data"); 382724f3478dSDan Williams sbi->s_mount_opt &= ~EXT4_MOUNT_DAX; 3828559db4c6SRoss Zwisler } 382980660f20SDave Jiang if (!bdev_dax_supported(sb->s_bdev, blocksize)) { 383024f3478dSDan Williams ext4_msg(sb, KERN_ERR, 383124f3478dSDan Williams "DAX unsupported by block device. Turning off DAX."); 383224f3478dSDan Williams sbi->s_mount_opt &= ~EXT4_MOUNT_DAX; 383324f3478dSDan Williams } 3834923ae0ffSRoss Zwisler } 3835923ae0ffSRoss Zwisler 3836e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 38376ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 38386ddb2447STheodore Ts'o es->s_encryption_level); 38396ddb2447STheodore Ts'o goto failed_mount; 38406ddb2447STheodore Ts'o } 38416ddb2447STheodore Ts'o 3842ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3843ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3844ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3845b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3846ce40733cSAneesh Kumar K.V blocksize); 3847ac27a0ecSDave Kleikamp goto failed_mount; 3848ac27a0ecSDave Kleikamp } 3849ac27a0ecSDave Kleikamp 3850ac27a0ecSDave Kleikamp brelse(bh); 385170bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 385270bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3853a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3854ac27a0ecSDave Kleikamp if (!bh) { 3855b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3856b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3857ac27a0ecSDave Kleikamp goto failed_mount; 3858ac27a0ecSDave Kleikamp } 38592716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3860ac27a0ecSDave Kleikamp sbi->s_es = es; 3861617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3862b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3863b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3864ac27a0ecSDave Kleikamp goto failed_mount; 3865ac27a0ecSDave Kleikamp } 3866ac27a0ecSDave Kleikamp } 3867ac27a0ecSDave Kleikamp 3868e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 3869f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3870f287a1a5STheodore Ts'o has_huge_files); 3871f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3872ac27a0ecSDave Kleikamp 3873617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3874617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3875617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3876ac27a0ecSDave Kleikamp } else { 3877ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3878ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3879c37e9e01STheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 3880c37e9e01STheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 3881c37e9e01STheodore Ts'o sbi->s_first_ino); 3882c37e9e01STheodore Ts'o goto failed_mount; 3883c37e9e01STheodore Ts'o } 3884617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 38851330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3886ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3887b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3888b31e1552SEric Sandeen "unsupported inode size: %d", 3889ac27a0ecSDave Kleikamp sbi->s_inode_size); 3890ac27a0ecSDave Kleikamp goto failed_mount; 3891ac27a0ecSDave Kleikamp } 3892ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3893ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3894ac27a0ecSDave Kleikamp } 38950b8e58a1SAndreas Dilger 38960d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 3897e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 38988fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 38990d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3900d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3901b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3902b31e1552SEric Sandeen "unsupported descriptor size %lu", 39030d1ee42fSAlexandre Ratchov sbi->s_desc_size); 39040d1ee42fSAlexandre Ratchov goto failed_mount; 39050d1ee42fSAlexandre Ratchov } 39060d1ee42fSAlexandre Ratchov } else 39070d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 39080b8e58a1SAndreas Dilger 3909ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3910ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 39110b8e58a1SAndreas Dilger 3912617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3913ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3914617ba13bSMingming Cao goto cantfind_ext4; 3915cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 3916cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 3917cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 3918cd6bb35bSTheodore Ts'o sbi->s_blocks_per_group); 3919cd6bb35bSTheodore Ts'o goto failed_mount; 3920cd6bb35bSTheodore Ts'o } 3921ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3922ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 39230d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3924ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3925ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3926e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3927e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 39280b8e58a1SAndreas Dilger 3929ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3930ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3931ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3932e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 3933f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3934f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3935f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3936f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3937f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3938bc98a42cSDavid Howells if (!sb_rdonly(sb)) 393923301410STheodore Ts'o es->s_flags |= 394023301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3941f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3942f99b2589STheodore Ts'o #else 3943bc98a42cSDavid Howells if (!sb_rdonly(sb)) 394423301410STheodore Ts'o es->s_flags |= 394523301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3946f99b2589STheodore Ts'o #endif 3947f99b2589STheodore Ts'o } 394823301410STheodore Ts'o } 3949ac27a0ecSDave Kleikamp 3950281b5995STheodore Ts'o /* Handle clustersize */ 3951281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3952e2b911c5SDarrick J. Wong has_bigalloc = ext4_has_feature_bigalloc(sb); 3953281b5995STheodore Ts'o if (has_bigalloc) { 3954281b5995STheodore Ts'o if (clustersize < blocksize) { 3955281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3956281b5995STheodore Ts'o "cluster size (%d) smaller than " 3957281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3958281b5995STheodore Ts'o goto failed_mount; 3959281b5995STheodore Ts'o } 3960281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3961281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3962281b5995STheodore Ts'o sbi->s_clusters_per_group = 3963281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3964281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3965281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3966281b5995STheodore Ts'o "#clusters per group too big: %lu", 3967281b5995STheodore Ts'o sbi->s_clusters_per_group); 3968281b5995STheodore Ts'o goto failed_mount; 3969281b5995STheodore Ts'o } 3970281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3971281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3972281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3973281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3974281b5995STheodore Ts'o sbi->s_blocks_per_group, 3975281b5995STheodore Ts'o sbi->s_clusters_per_group); 3976281b5995STheodore Ts'o goto failed_mount; 3977281b5995STheodore Ts'o } 3978281b5995STheodore Ts'o } else { 3979281b5995STheodore Ts'o if (clustersize != blocksize) { 3980bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 3981bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 3982bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 3983bfe0a5f4STheodore Ts'o goto failed_mount; 3984281b5995STheodore Ts'o } 3985ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3986b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3987b31e1552SEric Sandeen "#blocks per group too big: %lu", 3988ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3989ac27a0ecSDave Kleikamp goto failed_mount; 3990ac27a0ecSDave Kleikamp } 3991281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3992281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3993281b5995STheodore Ts'o } 3994281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3995281b5995STheodore Ts'o 3996960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3997960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3998960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3999960fd856STheodore Ts'o 4000bf43d84bSEric Sandeen /* 4001bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 4002bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 4003bf43d84bSEric Sandeen */ 40045a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 400530ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 40065a9ae68aSDarrick J. Wong if (err) { 4007b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 4008bf43d84bSEric Sandeen " too large to mount safely on this system"); 4009ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 401090c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 4011ac27a0ecSDave Kleikamp goto failed_mount; 4012ac27a0ecSDave Kleikamp } 4013ac27a0ecSDave Kleikamp 4014617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 4015617ba13bSMingming Cao goto cantfind_ext4; 4016e7c95593SEric Sandeen 40170f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 40180f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 40190f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4020b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4021b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 40220f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 40230f2ddca6SFrom: Thiemo Nagel goto failed_mount; 40240f2ddca6SFrom: Thiemo Nagel } 40250f2ddca6SFrom: Thiemo Nagel 40264ec11028STheodore Ts'o /* 40274ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 40284ec11028STheodore Ts'o * of the filesystem. 40294ec11028STheodore Ts'o */ 40304ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4031b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4032b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 4033e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 40344ec11028STheodore Ts'o ext4_blocks_count(es)); 4035e7c95593SEric Sandeen goto failed_mount; 4036e7c95593SEric Sandeen } 4037bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4038bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 4039bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4040bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 4041bfe0a5f4STheodore Ts'o goto failed_mount; 4042bfe0a5f4STheodore Ts'o } 4043bfe0a5f4STheodore Ts'o 4044bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 4045bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 4046bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 4047bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 40484ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4049b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 40504ec11028STheodore Ts'o "(block count %llu, first data block %u, " 4051b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 40524ec11028STheodore Ts'o ext4_blocks_count(es), 40534ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 40544ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 40554ec11028STheodore Ts'o goto failed_mount; 40564ec11028STheodore Ts'o } 4057bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 4058fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4059fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 4060617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4061617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 40623a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 40632ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 40643a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 40653a4b77cdSEryu Guan "first meta block group too large: %u " 40663a4b77cdSEryu Guan "(group descriptor block count %u)", 40673a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 40683a4b77cdSEryu Guan goto failed_mount; 40693a4b77cdSEryu Guan } 40703a4b77cdSEryu Guan } 4071344476e1SKees Cook sbi->s_group_desc = kvmalloc_array(db_count, 4072f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 4073ac27a0ecSDave Kleikamp GFP_KERNEL); 4074ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 4075b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 40762cde417dSTheodore Ts'o ret = -ENOMEM; 4077ac27a0ecSDave Kleikamp goto failed_mount; 4078ac27a0ecSDave Kleikamp } 4079bfe0a5f4STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 4080bfe0a5f4STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 4081bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 4082bfe0a5f4STheodore Ts'o le32_to_cpu(es->s_inodes_count), 4083bfe0a5f4STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 4084bfe0a5f4STheodore Ts'o ret = -EINVAL; 4085bfe0a5f4STheodore Ts'o goto failed_mount; 4086bfe0a5f4STheodore Ts'o } 4087ac27a0ecSDave Kleikamp 4088705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 4089ac27a0ecSDave Kleikamp 409085c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 409185c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 409285c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 409385c8f176SAndrew Perepechko sb_breadahead(sb, block); 409485c8f176SAndrew Perepechko } 409585c8f176SAndrew Perepechko 4096ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 409770bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 4098a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 4099ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 4100b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4101b31e1552SEric Sandeen "can't read group descriptor %d", i); 4102ac27a0ecSDave Kleikamp db_count = i; 4103ac27a0ecSDave Kleikamp goto failed_mount2; 4104ac27a0ecSDave Kleikamp } 4105ac27a0ecSDave Kleikamp } 410644de022cSTheodore Ts'o sbi->s_gdb_count = db_count; 4107829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 4108b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 41096a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 4110f9ae9cf5STheodore Ts'o goto failed_mount2; 4111ac27a0ecSDave Kleikamp } 4112772cb7c8SJose R. Santos 4113235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 411404496411STao Ma 4115a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 4116eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 4117ce7e010aSTheodore Ts'o goto failed_mount3; 4118ce7e010aSTheodore Ts'o 4119c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 412067a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 4121c9de560dSAlex Tomas 4122f9ae9cf5STheodore Ts'o /* 4123f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 4124f9ae9cf5STheodore Ts'o */ 4125f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 4126617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 4127617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 4128ffcc4182SEric Biggers #ifdef CONFIG_EXT4_FS_ENCRYPTION 4129a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 4130ffcc4182SEric Biggers #endif 4131ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4132617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 4133e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 41341fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 4135262b4662SJan Kara else 4136262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 4137689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 4138ac27a0ecSDave Kleikamp #endif 413985787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 4140f2fa2ffcSAneesh Kumar K.V 4141ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 41423b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 4143ac27a0ecSDave Kleikamp 4144ac27a0ecSDave Kleikamp sb->s_root = NULL; 4145ac27a0ecSDave Kleikamp 4146ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 4147e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 4148ac27a0ecSDave Kleikamp 4149bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 4150c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 415150460fe8SDarrick J. Wong goto failed_mount3a; 4152c5e06d10SJohann Lombardi 4153ac27a0ecSDave Kleikamp /* 4154ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 4155ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 4156ac27a0ecSDave Kleikamp */ 4157e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 41584753d8a2STheodore Ts'o err = ext4_load_journal(sb, es, journal_devnum); 41594753d8a2STheodore Ts'o if (err) 416050460fe8SDarrick J. Wong goto failed_mount3a; 4161bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 4162e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 4163b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 4164b31e1552SEric Sandeen "suppressed and not mounted read-only"); 4165744692dcSJiaying Zhang goto failed_mount_wq; 4166ac27a0ecSDave Kleikamp } else { 41671e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 41681e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 41691e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 41701e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 41711e381f60SDmitry Monakhov goto failed_mount_wq; 41721e381f60SDmitry Monakhov } 41731e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 41741e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 41751e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 41761e381f60SDmitry Monakhov goto failed_mount_wq; 41771e381f60SDmitry Monakhov } 41781e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 41791e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 41801e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 41811e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 41821e381f60SDmitry Monakhov goto failed_mount_wq; 41831e381f60SDmitry Monakhov } 41841e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 41851e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 41861e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 41871e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 41881e381f60SDmitry Monakhov goto failed_mount_wq; 41891e381f60SDmitry Monakhov } 41901e381f60SDmitry Monakhov sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; 41911e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 4192fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 41930390131bSFrank Mayhar sbi->s_journal = NULL; 41940390131bSFrank Mayhar needs_recovery = 0; 41950390131bSFrank Mayhar goto no_journal; 4196ac27a0ecSDave Kleikamp } 4197ac27a0ecSDave Kleikamp 4198e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 4199eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4200eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 4201b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4202744692dcSJiaying Zhang goto failed_mount_wq; 4203eb40a09cSJose R. Santos } 4204eb40a09cSJose R. Santos 420525ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 420625ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 420725ed6e8aSDarrick J. Wong "feature set"); 420825ed6e8aSDarrick J. Wong goto failed_mount_wq; 4209d4da6c9cSLinus Torvalds } 4210818d276cSGirish Shilamkar 4211ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4212ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4213ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4214ac27a0ecSDave Kleikamp case 0: 4215ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 421663f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 421763f57933SAndrew Morton * cope, else JOURNAL_DATA 421863f57933SAndrew Morton */ 4219dab291afSMingming Cao if (jbd2_journal_check_available_features 422027f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4221fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 422227f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 422327f394a7STyson Nottingham } else { 4224fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 422527f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 422627f394a7STyson Nottingham } 4227ac27a0ecSDave Kleikamp break; 4228ac27a0ecSDave Kleikamp 4229617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4230617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4231dab291afSMingming Cao if (!jbd2_journal_check_available_features 4232dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4233b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4234b31e1552SEric Sandeen "requested data journaling mode"); 4235744692dcSJiaying Zhang goto failed_mount_wq; 4236ac27a0ecSDave Kleikamp } 4237ac27a0ecSDave Kleikamp default: 4238ac27a0ecSDave Kleikamp break; 4239ac27a0ecSDave Kleikamp } 4240ab04df78SJan Kara 4241ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 4242ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 4243ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 4244ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 4245ab04df78SJan Kara goto failed_mount_wq; 4246ab04df78SJan Kara } 4247ab04df78SJan Kara 4248b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4249ac27a0ecSDave Kleikamp 425018aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 425118aadd47SBobi Jam 4252ce7e010aSTheodore Ts'o no_journal: 4253cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 425447387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 425547387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 4256cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 4257cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 42589c191f70ST Makphaibulchoke goto failed_mount_wq; 42599c191f70ST Makphaibulchoke } 42609c191f70ST Makphaibulchoke 4261dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4262dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 4263dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 4264dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4265dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 4266dec214d0STahsin Erdogan goto failed_mount_wq; 4267dec214d0STahsin Erdogan } 4268dec214d0STahsin Erdogan } 4269cdb7ee4cSTahsin Erdogan } 4270dec214d0STahsin Erdogan 4271e2b911c5SDarrick J. Wong if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && 427209cbfeafSKirill A. Shutemov (blocksize != PAGE_SIZE)) { 42731cb767cdSTheodore Ts'o ext4_msg(sb, KERN_ERR, 42741cb767cdSTheodore Ts'o "Unsupported blocksize for fs encryption"); 42751cb767cdSTheodore Ts'o goto failed_mount_wq; 42761cb767cdSTheodore Ts'o } 42771cb767cdSTheodore Ts'o 4278bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 4279e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 4280e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 42816ddb2447STheodore Ts'o ext4_commit_super(sb, 1); 42826ddb2447STheodore Ts'o } 42836ddb2447STheodore Ts'o 4284fd89d5f2STejun Heo /* 4285952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4286952fc18eSTheodore Ts'o * superblock if present. 4287952fc18eSTheodore Ts'o */ 4288952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4289952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4290952fc18eSTheodore Ts'o else { 429107aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 429207aa2ea1SLukas Czerner if (err) 4293952fc18eSTheodore Ts'o goto failed_mount_wq; 4294952fc18eSTheodore Ts'o } 4295952fc18eSTheodore Ts'o 4296952fc18eSTheodore Ts'o /* 4297fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4298fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4299fd89d5f2STejun Heo */ 43002e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 43012e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 43022e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 43032e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 430407aa2ea1SLukas Czerner ret = -ENOMEM; 43052e8fa54eSJan Kara goto failed_mount4; 43062e8fa54eSJan Kara } 43072e8fa54eSJan Kara 4308ac27a0ecSDave Kleikamp /* 4309dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4310ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4311ac27a0ecSDave Kleikamp */ 4312ac27a0ecSDave Kleikamp 43131d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 43141d1fe1eeSDavid Howells if (IS_ERR(root)) { 4315b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 43161d1fe1eeSDavid Howells ret = PTR_ERR(root); 431732a9bb57SManish Katiyar root = NULL; 4318ac27a0ecSDave Kleikamp goto failed_mount4; 4319ac27a0ecSDave Kleikamp } 4320ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4321b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 432294bf608aSAl Viro iput(root); 4323ac27a0ecSDave Kleikamp goto failed_mount4; 4324ac27a0ecSDave Kleikamp } 432548fde701SAl Viro sb->s_root = d_make_root(root); 43261d1fe1eeSDavid Howells if (!sb->s_root) { 4327b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 43281d1fe1eeSDavid Howells ret = -ENOMEM; 43291d1fe1eeSDavid Howells goto failed_mount4; 43301d1fe1eeSDavid Howells } 4331ac27a0ecSDave Kleikamp 4332c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 4333c89128a0SJaegeuk Kim if (ret == -EROFS) { 43341751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 4335c89128a0SJaegeuk Kim ret = 0; 4336c89128a0SJaegeuk Kim } else if (ret) 4337c89128a0SJaegeuk Kim goto failed_mount4a; 4338ef7f3835SKalpak Shah 4339ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4340670e9875STheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE && 4341670e9875STheodore Ts'o sbi->s_want_extra_isize == 0) { 4342ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4343ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4344e2b911c5SDarrick J. Wong if (ext4_has_feature_extra_isize(sb)) { 4345ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4346ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4347ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4348ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4349ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4350ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4351ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4352ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4353ef7f3835SKalpak Shah } 4354ef7f3835SKalpak Shah } 4355ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4356ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4357ef7f3835SKalpak Shah sbi->s_inode_size) { 4358ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4359ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4360b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4361b31e1552SEric Sandeen "available"); 4362ef7f3835SKalpak Shah } 4363ef7f3835SKalpak Shah 4364b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 436527dd4385SLukas Czerner 43666fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 43676fd058f7STheodore Ts'o if (err) { 4368b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4369fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4370f9ae9cf5STheodore Ts'o goto failed_mount4a; 4371f9ae9cf5STheodore Ts'o } 4372f9ae9cf5STheodore Ts'o 4373f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4374f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4375f9ae9cf5STheodore Ts'o if (err) { 4376f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4377f9ae9cf5STheodore Ts'o err); 4378dcf2d804STao Ma goto failed_mount5; 4379c2774d84SAneesh Kumar K.V } 4380c2774d84SAneesh Kumar K.V 4381d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4382d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4383d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 43844274f516STheodore Ts'o ext4_superblock_csum_set(sb); 4385908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4386908c7f19STejun Heo GFP_KERNEL); 4387d5e03cbbSTheodore Ts'o if (!err) { 4388d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4389d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 43904274f516STheodore Ts'o ext4_superblock_csum_set(sb); 4391908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4392908c7f19STejun Heo GFP_KERNEL); 4393d5e03cbbSTheodore Ts'o } 4394d5e03cbbSTheodore Ts'o if (!err) 4395d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4396908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4397d5e03cbbSTheodore Ts'o if (!err) 4398908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4399908c7f19STejun Heo GFP_KERNEL); 4400c8585c6fSDaeho Jeong if (!err) 4401c8585c6fSDaeho Jeong err = percpu_init_rwsem(&sbi->s_journal_flag_rwsem); 4402c8585c6fSDaeho Jeong 4403d5e03cbbSTheodore Ts'o if (err) { 4404d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4405d5e03cbbSTheodore Ts'o goto failed_mount6; 4406d5e03cbbSTheodore Ts'o } 4407d5e03cbbSTheodore Ts'o 4408e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 4409d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4410d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4411d5e03cbbSTheodore Ts'o "unable to initialize " 4412d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4413d5e03cbbSTheodore Ts'o goto failed_mount6; 4414d5e03cbbSTheodore Ts'o } 4415d5e03cbbSTheodore Ts'o 4416bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4417bfff6873SLukas Czerner if (err) 4418dcf2d804STao Ma goto failed_mount6; 4419bfff6873SLukas Czerner 4420b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 4421dcf2d804STao Ma if (err) 4422dcf2d804STao Ma goto failed_mount7; 44233197ebdbSTheodore Ts'o 44249b2ff357SJan Kara #ifdef CONFIG_QUOTA 44259b2ff357SJan Kara /* Enable quota usage during mount. */ 4426bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 44279b2ff357SJan Kara err = ext4_enable_quotas(sb); 44289b2ff357SJan Kara if (err) 44299b2ff357SJan Kara goto failed_mount8; 44309b2ff357SJan Kara } 44319b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 44329b2ff357SJan Kara 4433617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4434617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4435617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 44360390131bSFrank Mayhar if (needs_recovery) { 4437b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4438617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 44390390131bSFrank Mayhar } 44400390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 44410390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 44420390131bSFrank Mayhar descr = " journalled data mode"; 44430390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 44440390131bSFrank Mayhar descr = " ordered data mode"; 44450390131bSFrank Mayhar else 44460390131bSFrank Mayhar descr = " writeback data mode"; 44470390131bSFrank Mayhar } else 44480390131bSFrank Mayhar descr = "out journal"; 44490390131bSFrank Mayhar 445079add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 445179add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 445279add3a3SLukas Czerner if (!blk_queue_discard(q)) 445379add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 445479add3a3SLukas Czerner "mounting with \"discard\" option, but " 445579add3a3SLukas Czerner "the device does not support discard"); 445679add3a3SLukas Czerner } 445779add3a3SLukas Czerner 4458e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 4459d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 44605aee0f8aSTheodore Ts'o "Opts: %.*s%s%s", descr, 44615aee0f8aSTheodore Ts'o (int) sizeof(sbi->s_es->s_mount_opts), 44625aee0f8aSTheodore Ts'o sbi->s_es->s_mount_opts, 44638b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4464ac27a0ecSDave Kleikamp 446566e61a9eSTheodore Ts'o if (es->s_error_count) 446666e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4467ac27a0ecSDave Kleikamp 4468efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4469efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4470efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4471efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4472efbed4dcSTheodore Ts'o 4473d4c402d9SCurt Wohlgemuth kfree(orig_data); 4474ac27a0ecSDave Kleikamp return 0; 4475ac27a0ecSDave Kleikamp 4476617ba13bSMingming Cao cantfind_ext4: 4477ac27a0ecSDave Kleikamp if (!silent) 4478b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4479ac27a0ecSDave Kleikamp goto failed_mount; 4480ac27a0ecSDave Kleikamp 448172ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 448272ba7450STheodore Ts'o failed_mount8: 4483ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 448472ba7450STheodore Ts'o #endif 4485dcf2d804STao Ma failed_mount7: 4486dcf2d804STao Ma ext4_unregister_li_request(sb); 4487dcf2d804STao Ma failed_mount6: 4488f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4489d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4490b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 4491d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4492d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4493d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4494d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 449500764937SAzat Khuzhin failed_mount5: 4496f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4497f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4498f9ae9cf5STheodore Ts'o failed_mount4a: 449994bf608aSAl Viro dput(sb->s_root); 450032a9bb57SManish Katiyar sb->s_root = NULL; 450194bf608aSAl Viro failed_mount4: 4502b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 45032e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 45042e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 45054c0425ffSMingming Cao failed_mount_wq: 4506dec214d0STahsin Erdogan if (sbi->s_ea_inode_cache) { 4507dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 4508dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 4509dec214d0STahsin Erdogan } 451047387409STahsin Erdogan if (sbi->s_ea_block_cache) { 451147387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 451247387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 451382939d79SJan Kara } 45140390131bSFrank Mayhar if (sbi->s_journal) { 4515dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 451647b4a50bSJan Kara sbi->s_journal = NULL; 45170390131bSFrank Mayhar } 451850460fe8SDarrick J. Wong failed_mount3a: 4519d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4520eb68d0e2SZheng Liu failed_mount3: 45219105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4522c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4523c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4524ac27a0ecSDave Kleikamp failed_mount2: 4525ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4526ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4527b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4528ac27a0ecSDave Kleikamp failed_mount: 45290441984aSDarrick J. Wong if (sbi->s_chksum_driver) 45300441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4531ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4532a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4533ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4534ac27a0ecSDave Kleikamp #endif 4535617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4536ac27a0ecSDave Kleikamp brelse(bh); 4537ac27a0ecSDave Kleikamp out_fail: 4538ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4539f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 45405aee0f8aSTheodore Ts'o out_free_base: 4541ac27a0ecSDave Kleikamp kfree(sbi); 4542d4c402d9SCurt Wohlgemuth kfree(orig_data); 45435e405595SDan Williams fs_put_dax(dax_dev); 454407aa2ea1SLukas Czerner return err ? err : ret; 4545ac27a0ecSDave Kleikamp } 4546ac27a0ecSDave Kleikamp 4547ac27a0ecSDave Kleikamp /* 4548ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4549ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4550ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4551ac27a0ecSDave Kleikamp */ 4552617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4553ac27a0ecSDave Kleikamp { 4554617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4555ac27a0ecSDave Kleikamp 4556ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 455730773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 455830773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4559ac27a0ecSDave Kleikamp 4560a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4561ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4562dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4563ac27a0ecSDave Kleikamp else 4564dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 45655bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 45665bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 45675bf5683aSHidehiro Kawai else 45685bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4569a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4570ac27a0ecSDave Kleikamp } 4571ac27a0ecSDave Kleikamp 4572c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 4573ac27a0ecSDave Kleikamp unsigned int journal_inum) 4574ac27a0ecSDave Kleikamp { 4575ac27a0ecSDave Kleikamp struct inode *journal_inode; 4576ac27a0ecSDave Kleikamp 4577c6cb7e77SEric Whitney /* 4578c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 4579c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 4580c6cb7e77SEric Whitney * will try to delete it. 4581c6cb7e77SEric Whitney */ 45821d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 45831d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4584b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4585ac27a0ecSDave Kleikamp return NULL; 4586ac27a0ecSDave Kleikamp } 4587ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4588ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4589ac27a0ecSDave Kleikamp iput(journal_inode); 4590b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4591ac27a0ecSDave Kleikamp return NULL; 4592ac27a0ecSDave Kleikamp } 4593ac27a0ecSDave Kleikamp 4594e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4595ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 45961d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4597b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4598ac27a0ecSDave Kleikamp iput(journal_inode); 4599ac27a0ecSDave Kleikamp return NULL; 4600ac27a0ecSDave Kleikamp } 4601c6cb7e77SEric Whitney return journal_inode; 4602c6cb7e77SEric Whitney } 4603c6cb7e77SEric Whitney 4604c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 4605c6cb7e77SEric Whitney unsigned int journal_inum) 4606c6cb7e77SEric Whitney { 4607c6cb7e77SEric Whitney struct inode *journal_inode; 4608c6cb7e77SEric Whitney journal_t *journal; 4609c6cb7e77SEric Whitney 4610c6cb7e77SEric Whitney BUG_ON(!ext4_has_feature_journal(sb)); 4611c6cb7e77SEric Whitney 4612c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 4613c6cb7e77SEric Whitney if (!journal_inode) 4614c6cb7e77SEric Whitney return NULL; 4615ac27a0ecSDave Kleikamp 4616dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4617ac27a0ecSDave Kleikamp if (!journal) { 4618b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4619ac27a0ecSDave Kleikamp iput(journal_inode); 4620ac27a0ecSDave Kleikamp return NULL; 4621ac27a0ecSDave Kleikamp } 4622ac27a0ecSDave Kleikamp journal->j_private = sb; 4623617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4624ac27a0ecSDave Kleikamp return journal; 4625ac27a0ecSDave Kleikamp } 4626ac27a0ecSDave Kleikamp 4627617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4628ac27a0ecSDave Kleikamp dev_t j_dev) 4629ac27a0ecSDave Kleikamp { 4630ac27a0ecSDave Kleikamp struct buffer_head *bh; 4631ac27a0ecSDave Kleikamp journal_t *journal; 4632617ba13bSMingming Cao ext4_fsblk_t start; 4633617ba13bSMingming Cao ext4_fsblk_t len; 4634ac27a0ecSDave Kleikamp int hblock, blocksize; 4635617ba13bSMingming Cao ext4_fsblk_t sb_block; 4636ac27a0ecSDave Kleikamp unsigned long offset; 4637617ba13bSMingming Cao struct ext4_super_block *es; 4638ac27a0ecSDave Kleikamp struct block_device *bdev; 4639ac27a0ecSDave Kleikamp 4640e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 46410390131bSFrank Mayhar 4642b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4643ac27a0ecSDave Kleikamp if (bdev == NULL) 4644ac27a0ecSDave Kleikamp return NULL; 4645ac27a0ecSDave Kleikamp 4646ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4647e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4648ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4649b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4650b31e1552SEric Sandeen "blocksize too small for journal device"); 4651ac27a0ecSDave Kleikamp goto out_bdev; 4652ac27a0ecSDave Kleikamp } 4653ac27a0ecSDave Kleikamp 4654617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4655617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4656ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4657ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4658b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4659b31e1552SEric Sandeen "external journal"); 4660ac27a0ecSDave Kleikamp goto out_bdev; 4661ac27a0ecSDave Kleikamp } 4662ac27a0ecSDave Kleikamp 46632716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4664617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4665ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4666617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4667b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4668b31e1552SEric Sandeen "bad superblock"); 4669ac27a0ecSDave Kleikamp brelse(bh); 4670ac27a0ecSDave Kleikamp goto out_bdev; 4671ac27a0ecSDave Kleikamp } 4672ac27a0ecSDave Kleikamp 4673df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4674df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4675df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4676df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4677df4763beSDarrick J. Wong "corrupt superblock"); 4678df4763beSDarrick J. Wong brelse(bh); 4679df4763beSDarrick J. Wong goto out_bdev; 4680df4763beSDarrick J. Wong } 4681df4763beSDarrick J. Wong 4682617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4683b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4684ac27a0ecSDave Kleikamp brelse(bh); 4685ac27a0ecSDave Kleikamp goto out_bdev; 4686ac27a0ecSDave Kleikamp } 4687ac27a0ecSDave Kleikamp 4688bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4689ac27a0ecSDave Kleikamp start = sb_block + 1; 4690ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4691ac27a0ecSDave Kleikamp 4692dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4693ac27a0ecSDave Kleikamp start, len, blocksize); 4694ac27a0ecSDave Kleikamp if (!journal) { 4695b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4696ac27a0ecSDave Kleikamp goto out_bdev; 4697ac27a0ecSDave Kleikamp } 4698ac27a0ecSDave Kleikamp journal->j_private = sb; 4699dfec8a14SMike Christie ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4700ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4701ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4702b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4703ac27a0ecSDave Kleikamp goto out_journal; 4704ac27a0ecSDave Kleikamp } 4705ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4706b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4707b31e1552SEric Sandeen "user (unsupported) - %d", 4708ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4709ac27a0ecSDave Kleikamp goto out_journal; 4710ac27a0ecSDave Kleikamp } 4711617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4712617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4713ac27a0ecSDave Kleikamp return journal; 47140b8e58a1SAndreas Dilger 4715ac27a0ecSDave Kleikamp out_journal: 4716dab291afSMingming Cao jbd2_journal_destroy(journal); 4717ac27a0ecSDave Kleikamp out_bdev: 4718617ba13bSMingming Cao ext4_blkdev_put(bdev); 4719ac27a0ecSDave Kleikamp return NULL; 4720ac27a0ecSDave Kleikamp } 4721ac27a0ecSDave Kleikamp 4722617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4723617ba13bSMingming Cao struct ext4_super_block *es, 4724ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4725ac27a0ecSDave Kleikamp { 4726ac27a0ecSDave Kleikamp journal_t *journal; 4727ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4728ac27a0ecSDave Kleikamp dev_t journal_dev; 4729ac27a0ecSDave Kleikamp int err = 0; 4730ac27a0ecSDave Kleikamp int really_read_only; 4731ac27a0ecSDave Kleikamp 4732e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 47330390131bSFrank Mayhar 4734ac27a0ecSDave Kleikamp if (journal_devnum && 4735ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4736b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4737b31e1552SEric Sandeen "numbers have changed"); 4738ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4739ac27a0ecSDave Kleikamp } else 4740ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4741ac27a0ecSDave Kleikamp 4742ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4743ac27a0ecSDave Kleikamp 4744ac27a0ecSDave Kleikamp /* 4745ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4746ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4747ac27a0ecSDave Kleikamp * can get read-write access to the device. 4748ac27a0ecSDave Kleikamp */ 4749e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 4750bc98a42cSDavid Howells if (sb_rdonly(sb)) { 4751b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4752b31e1552SEric Sandeen "required on readonly filesystem"); 4753ac27a0ecSDave Kleikamp if (really_read_only) { 4754b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4755d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 4756d98bf8cdSSimon Ruderich "(try mounting with noload)"); 4757ac27a0ecSDave Kleikamp return -EROFS; 4758ac27a0ecSDave Kleikamp } 4759b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4760b31e1552SEric Sandeen "be enabled during recovery"); 4761ac27a0ecSDave Kleikamp } 4762ac27a0ecSDave Kleikamp } 4763ac27a0ecSDave Kleikamp 4764ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4765b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4766b31e1552SEric Sandeen "and inode journals!"); 4767ac27a0ecSDave Kleikamp return -EINVAL; 4768ac27a0ecSDave Kleikamp } 4769ac27a0ecSDave Kleikamp 4770ac27a0ecSDave Kleikamp if (journal_inum) { 4771617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4772ac27a0ecSDave Kleikamp return -EINVAL; 4773ac27a0ecSDave Kleikamp } else { 4774617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4775ac27a0ecSDave Kleikamp return -EINVAL; 4776ac27a0ecSDave Kleikamp } 4777ac27a0ecSDave Kleikamp 477890576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4779b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 47804776004fSTheodore Ts'o 4781e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 4782dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 47831c13d5c0STheodore Ts'o if (!err) { 47841c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 47851c13d5c0STheodore Ts'o if (save) 47861c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 47871c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4788dab291afSMingming Cao err = jbd2_journal_load(journal); 47891c13d5c0STheodore Ts'o if (save) 47901c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 47911c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 47921c13d5c0STheodore Ts'o kfree(save); 47931c13d5c0STheodore Ts'o } 4794ac27a0ecSDave Kleikamp 4795ac27a0ecSDave Kleikamp if (err) { 4796b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4797dab291afSMingming Cao jbd2_journal_destroy(journal); 4798ac27a0ecSDave Kleikamp return err; 4799ac27a0ecSDave Kleikamp } 4800ac27a0ecSDave Kleikamp 4801617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4802617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4803ac27a0ecSDave Kleikamp 4804c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4805ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4806ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4807ac27a0ecSDave Kleikamp 4808ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4809e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4810ac27a0ecSDave Kleikamp } 4811ac27a0ecSDave Kleikamp 4812ac27a0ecSDave Kleikamp return 0; 4813ac27a0ecSDave Kleikamp } 4814ac27a0ecSDave Kleikamp 4815e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4816ac27a0ecSDave Kleikamp { 4817e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4818617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4819c4be0c1dSTakashi Sato int error = 0; 4820ac27a0ecSDave Kleikamp 4821bdfe0cbdSTheodore Ts'o if (!sbh || block_device_ejected(sb)) 4822c4be0c1dSTakashi Sato return error; 4823a17712c8SJon Derrick 4824a17712c8SJon Derrick /* 4825a17712c8SJon Derrick * The superblock bh should be mapped, but it might not be if the 4826a17712c8SJon Derrick * device was hot-removed. Not much we can do but fail the I/O. 4827a17712c8SJon Derrick */ 4828a17712c8SJon Derrick if (!buffer_mapped(sbh)) 4829a17712c8SJon Derrick return error; 4830a17712c8SJon Derrick 483171290b36STheodore Ts'o /* 483271290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 483371290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 483471290b36STheodore Ts'o * write time when we are mounting the root file system 483571290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 483671290b36STheodore Ts'o * for people who are east of GMT and who make their clock 483771290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 483871290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 483971290b36STheodore Ts'o * to complain and force a full file system check. 484071290b36STheodore Ts'o */ 48411751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 48426a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 4843f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4844afc32f7eSTheodore Ts'o es->s_kbytes_written = 4845afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4846dbae2c55SMichael Callahan ((part_stat_read(sb->s_bdev->bd_part, 4847dbae2c55SMichael Callahan sectors[STAT_WRITE]) - 4848afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4849f613dfcbSTheodore Ts'o else 4850f613dfcbSTheodore Ts'o es->s_kbytes_written = 4851f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4852d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 485357042651STheodore Ts'o ext4_free_blocks_count_set(es, 485457042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 485557042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4856d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 48577f93cff9STheodore Ts'o es->s_free_inodes_count = 48587f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 48595d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4860ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 486106db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 48621566a48aSTheodore Ts'o if (sync) 48634743f839SPranay Kr. Srivastava lock_buffer(sbh); 48644743f839SPranay Kr. Srivastava if (buffer_write_io_error(sbh)) { 48654743f839SPranay Kr. Srivastava /* 48664743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 48674743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 48684743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 48694743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 48704743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 48714743f839SPranay Kr. Srivastava * write and hope for the best. 48724743f839SPranay Kr. Srivastava */ 48734743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 48744743f839SPranay Kr. Srivastava "superblock detected"); 48754743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 48764743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 48774743f839SPranay Kr. Srivastava } 4878ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4879914258bfSTheodore Ts'o if (sync) { 48801566a48aSTheodore Ts'o unlock_buffer(sbh); 4881564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 488200473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 4883c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 4884b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4885b31e1552SEric Sandeen "superblock"); 4886914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4887914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4888914258bfSTheodore Ts'o } 4889914258bfSTheodore Ts'o } 4890c4be0c1dSTakashi Sato return error; 4891ac27a0ecSDave Kleikamp } 4892ac27a0ecSDave Kleikamp 4893ac27a0ecSDave Kleikamp /* 4894ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4895ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4896ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4897ac27a0ecSDave Kleikamp */ 4898617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4899617ba13bSMingming Cao struct ext4_super_block *es) 4900ac27a0ecSDave Kleikamp { 4901617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4902ac27a0ecSDave Kleikamp 4903e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 49040390131bSFrank Mayhar BUG_ON(journal != NULL); 49050390131bSFrank Mayhar return; 49060390131bSFrank Mayhar } 4907dab291afSMingming Cao jbd2_journal_lock_updates(journal); 49087ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 49097ffe1ea8SHidehiro Kawai goto out; 49107ffe1ea8SHidehiro Kawai 4911bc98a42cSDavid Howells if (ext4_has_feature_journal_needs_recovery(sb) && sb_rdonly(sb)) { 4912e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4913e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4914ac27a0ecSDave Kleikamp } 49157ffe1ea8SHidehiro Kawai 49167ffe1ea8SHidehiro Kawai out: 4917dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4918ac27a0ecSDave Kleikamp } 4919ac27a0ecSDave Kleikamp 4920ac27a0ecSDave Kleikamp /* 4921ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4922ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4923ac27a0ecSDave Kleikamp * main filesystem now. 4924ac27a0ecSDave Kleikamp */ 4925617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4926617ba13bSMingming Cao struct ext4_super_block *es) 4927ac27a0ecSDave Kleikamp { 4928ac27a0ecSDave Kleikamp journal_t *journal; 4929ac27a0ecSDave Kleikamp int j_errno; 4930ac27a0ecSDave Kleikamp const char *errstr; 4931ac27a0ecSDave Kleikamp 4932e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 49330390131bSFrank Mayhar 4934617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4935ac27a0ecSDave Kleikamp 4936ac27a0ecSDave Kleikamp /* 4937ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4938617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4939ac27a0ecSDave Kleikamp */ 4940ac27a0ecSDave Kleikamp 4941dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4942ac27a0ecSDave Kleikamp if (j_errno) { 4943ac27a0ecSDave Kleikamp char nbuf[16]; 4944ac27a0ecSDave Kleikamp 4945617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 494612062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4947ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 494812062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4949ac27a0ecSDave Kleikamp 4950617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4951617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4952e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4953ac27a0ecSDave Kleikamp 4954dab291afSMingming Cao jbd2_journal_clear_err(journal); 4955d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4956ac27a0ecSDave Kleikamp } 4957ac27a0ecSDave Kleikamp } 4958ac27a0ecSDave Kleikamp 4959ac27a0ecSDave Kleikamp /* 4960ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4961ac27a0ecSDave Kleikamp * and wait on the commit. 4962ac27a0ecSDave Kleikamp */ 4963617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4964ac27a0ecSDave Kleikamp { 4965ac27a0ecSDave Kleikamp journal_t *journal; 4966ac27a0ecSDave Kleikamp 4967bc98a42cSDavid Howells if (sb_rdonly(sb)) 4968ac27a0ecSDave Kleikamp return 0; 4969ac27a0ecSDave Kleikamp 4970617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4971b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4972ac27a0ecSDave Kleikamp } 4973ac27a0ecSDave Kleikamp 4974617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4975ac27a0ecSDave Kleikamp { 497614ce0cb4STheodore Ts'o int ret = 0; 49779eddacf9SJan Kara tid_t target; 497806a407f1SDmitry Monakhov bool needs_barrier = false; 49798d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4980ac27a0ecSDave Kleikamp 498149598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 49820db1ff22STheodore Ts'o return 0; 49830db1ff22STheodore Ts'o 49849bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 49852e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4986a1177825SJan Kara /* 4987a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4988a1177825SJan Kara * no dirty dquots 4989a1177825SJan Kara */ 4990a1177825SJan Kara dquot_writeback_dquots(sb, -1); 499106a407f1SDmitry Monakhov /* 499206a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 499306a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 499406a407f1SDmitry Monakhov * transaction_commit will do it for us. 499506a407f1SDmitry Monakhov */ 4996bda32530STheodore Ts'o if (sbi->s_journal) { 499706a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 499806a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 499906a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 500006a407f1SDmitry Monakhov needs_barrier = true; 500106a407f1SDmitry Monakhov 50028d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 5003ac27a0ecSDave Kleikamp if (wait) 5004bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 5005bda32530STheodore Ts'o target); 50060390131bSFrank Mayhar } 5007bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 5008bda32530STheodore Ts'o needs_barrier = true; 500906a407f1SDmitry Monakhov if (needs_barrier) { 501006a407f1SDmitry Monakhov int err; 501106a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 501206a407f1SDmitry Monakhov if (!ret) 501306a407f1SDmitry Monakhov ret = err; 501406a407f1SDmitry Monakhov } 501506a407f1SDmitry Monakhov 501606a407f1SDmitry Monakhov return ret; 501706a407f1SDmitry Monakhov } 501806a407f1SDmitry Monakhov 5019ac27a0ecSDave Kleikamp /* 5020ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 5021ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 5022be4f27d3SYongqiang Yang * 5023be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 50248e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 50258e8ad8a5SJan Kara * modifications. 5026ac27a0ecSDave Kleikamp */ 5027c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 5028ac27a0ecSDave Kleikamp { 5029c4be0c1dSTakashi Sato int error = 0; 5030c4be0c1dSTakashi Sato journal_t *journal; 5031ac27a0ecSDave Kleikamp 5032bc98a42cSDavid Howells if (sb_rdonly(sb)) 50339ca92389STheodore Ts'o return 0; 50349ca92389STheodore Ts'o 5035c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 5036ac27a0ecSDave Kleikamp 5037bb044576STheodore Ts'o if (journal) { 5038ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 5039dab291afSMingming Cao jbd2_journal_lock_updates(journal); 50407ffe1ea8SHidehiro Kawai 50417ffe1ea8SHidehiro Kawai /* 5042bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 5043bb044576STheodore Ts'o * flush the journal. 50447ffe1ea8SHidehiro Kawai */ 5045c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 50466b0310fbSEric Sandeen if (error < 0) 50476b0310fbSEric Sandeen goto out; 5048ac27a0ecSDave Kleikamp 5049ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 5050e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 5051c642dc9eSEric Sandeen } 5052c642dc9eSEric Sandeen 5053e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 50546b0310fbSEric Sandeen out: 5055bb044576STheodore Ts'o if (journal) 50568e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 5057bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 50586b0310fbSEric Sandeen return error; 5059ac27a0ecSDave Kleikamp } 5060ac27a0ecSDave Kleikamp 5061ac27a0ecSDave Kleikamp /* 5062ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 5063ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 5064ac27a0ecSDave Kleikamp */ 5065c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 5066ac27a0ecSDave Kleikamp { 5067bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 50689ca92389STheodore Ts'o return 0; 50699ca92389STheodore Ts'o 5070c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 50719ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 5072e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 5073c642dc9eSEric Sandeen } 5074c642dc9eSEric Sandeen 5075e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 5076c4be0c1dSTakashi Sato return 0; 5077ac27a0ecSDave Kleikamp } 5078ac27a0ecSDave Kleikamp 5079673c6100STheodore Ts'o /* 5080673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 5081673c6100STheodore Ts'o */ 5082673c6100STheodore Ts'o struct ext4_mount_options { 5083673c6100STheodore Ts'o unsigned long s_mount_opt; 5084a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 508508cefc7aSEric W. Biederman kuid_t s_resuid; 508608cefc7aSEric W. Biederman kgid_t s_resgid; 5087673c6100STheodore Ts'o unsigned long s_commit_interval; 5088673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 5089673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 5090673c6100STheodore Ts'o int s_jquota_fmt; 5091a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 5092673c6100STheodore Ts'o #endif 5093673c6100STheodore Ts'o }; 5094673c6100STheodore Ts'o 5095617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 5096ac27a0ecSDave Kleikamp { 5097617ba13bSMingming Cao struct ext4_super_block *es; 5098617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5099ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 5100617ba13bSMingming Cao struct ext4_mount_options old_opts; 5101c79d967dSChristoph Hellwig int enable_quota = 0; 51028a266467STheodore Ts'o ext4_group_t g; 5103b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 5104c5e06d10SJohann Lombardi int err = 0; 5105ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 510603dafb5fSChen Gang int i, j; 5107ac27a0ecSDave Kleikamp #endif 5108d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 5109ac27a0ecSDave Kleikamp 511021ac738eSChengguang Xu if (data && !orig_data) 511121ac738eSChengguang Xu return -ENOMEM; 511221ac738eSChengguang Xu 5113ac27a0ecSDave Kleikamp /* Store the original options */ 5114ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 5115ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 5116a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 5117ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 5118ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 5119ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 512030773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 512130773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 5122ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5123ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 5124a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 512503dafb5fSChen Gang if (sbi->s_qf_names[i]) { 512603dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 512703dafb5fSChen Gang GFP_KERNEL); 512803dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 512903dafb5fSChen Gang for (j = 0; j < i; j++) 513003dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 51313e36a163SWei Yongjun kfree(orig_data); 513203dafb5fSChen Gang return -ENOMEM; 513303dafb5fSChen Gang } 513403dafb5fSChen Gang } else 513503dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 5136ac27a0ecSDave Kleikamp #endif 5137b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 5138b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 5139ac27a0ecSDave Kleikamp 5140661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 5141ac27a0ecSDave Kleikamp err = -EINVAL; 5142ac27a0ecSDave Kleikamp goto restore_opts; 5143ac27a0ecSDave Kleikamp } 5144ac27a0ecSDave Kleikamp 51456b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 51466b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 51476b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 51482d5b86e0SEric Sandeen "during remount not supported; ignoring"); 51492d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 5150c6d3d56dSDarrick J. Wong } 5151c6d3d56dSDarrick J. Wong 51526ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 51536ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 51546ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 51556ae6514bSPiotr Sarna "both data=journal and delalloc"); 51566ae6514bSPiotr Sarna err = -EINVAL; 51576ae6514bSPiotr Sarna goto restore_opts; 51586ae6514bSPiotr Sarna } 51596ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 51606ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 51616ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 51626ae6514bSPiotr Sarna err = -EINVAL; 51636ae6514bSPiotr Sarna goto restore_opts; 51646ae6514bSPiotr Sarna } 5165923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 5166923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 5167923ae0ffSRoss Zwisler "both data=journal and dax"); 5168923ae0ffSRoss Zwisler err = -EINVAL; 5169923ae0ffSRoss Zwisler goto restore_opts; 5170923ae0ffSRoss Zwisler } 5171ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 5172ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5173ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5174ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5175ab04df78SJan Kara err = -EINVAL; 5176ab04df78SJan Kara goto restore_opts; 5177ab04df78SJan Kara } 5178923ae0ffSRoss Zwisler } 5179923ae0ffSRoss Zwisler 5180cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 5181cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 5182cdb7ee4cSTahsin Erdogan err = -EINVAL; 5183cdb7ee4cSTahsin Erdogan goto restore_opts; 5184cdb7ee4cSTahsin Erdogan } 5185cdb7ee4cSTahsin Erdogan 5186923ae0ffSRoss Zwisler if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { 5187923ae0ffSRoss Zwisler ext4_msg(sb, KERN_WARNING, "warning: refusing change of " 5188923ae0ffSRoss Zwisler "dax flag with busy inodes while remounting"); 5189923ae0ffSRoss Zwisler sbi->s_mount_opt ^= EXT4_MOUNT_DAX; 51906ae6514bSPiotr Sarna } 51916ae6514bSPiotr Sarna 51924ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 5193c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 5194ac27a0ecSDave Kleikamp 51951751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 51961751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 5197ac27a0ecSDave Kleikamp 5198ac27a0ecSDave Kleikamp es = sbi->s_es; 5199ac27a0ecSDave Kleikamp 5200b3881f74STheodore Ts'o if (sbi->s_journal) { 5201617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 5202b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 5203b3881f74STheodore Ts'o } 5204ac27a0ecSDave Kleikamp 52051751e8a6SLinus Torvalds if (*flags & SB_LAZYTIME) 52061751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 5207a2fd66d0STheodore Ts'o 52081751e8a6SLinus Torvalds if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 52094ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 5210ac27a0ecSDave Kleikamp err = -EROFS; 5211ac27a0ecSDave Kleikamp goto restore_opts; 5212ac27a0ecSDave Kleikamp } 5213ac27a0ecSDave Kleikamp 52141751e8a6SLinus Torvalds if (*flags & SB_RDONLY) { 521538c03b34STheodore Ts'o err = sync_filesystem(sb); 521638c03b34STheodore Ts'o if (err < 0) 521738c03b34STheodore Ts'o goto restore_opts; 52180f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 52190f0dd62fSChristoph Hellwig if (err < 0) 5220c79d967dSChristoph Hellwig goto restore_opts; 5221c79d967dSChristoph Hellwig 5222ac27a0ecSDave Kleikamp /* 5223ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 5224ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 5225ac27a0ecSDave Kleikamp */ 52261751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5227ac27a0ecSDave Kleikamp 5228ac27a0ecSDave Kleikamp /* 5229ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 5230ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 5231ac27a0ecSDave Kleikamp * mark the partition as valid again. 5232ac27a0ecSDave Kleikamp */ 5233617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 5234617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 5235ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 5236ac27a0ecSDave Kleikamp 5237a63c9eb2STheodore Ts'o if (sbi->s_journal) 5238617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 52392dca60d9STheodore Ts'o if (sbi->s_mmp_tsk) 52402dca60d9STheodore Ts'o kthread_stop(sbi->s_mmp_tsk); 5241ac27a0ecSDave Kleikamp } else { 5242a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 5243e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 52442cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 5245ac27a0ecSDave Kleikamp err = -EROFS; 5246ac27a0ecSDave Kleikamp goto restore_opts; 5247ac27a0ecSDave Kleikamp } 5248ead6596bSEric Sandeen /* 52498a266467STheodore Ts'o * Make sure the group descriptor checksums 52500b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 52518a266467STheodore Ts'o */ 52528a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 52538a266467STheodore Ts'o struct ext4_group_desc *gdp = 52548a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 52558a266467STheodore Ts'o 5256feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 5257b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5258b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 5259e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 52608a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 52616a797d27SDarrick J. Wong err = -EFSBADCRC; 52628a266467STheodore Ts'o goto restore_opts; 52638a266467STheodore Ts'o } 52648a266467STheodore Ts'o } 52658a266467STheodore Ts'o 52668a266467STheodore Ts'o /* 5267ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 5268ead6596bSEric Sandeen * around from a previously readonly bdev mount, 5269ead6596bSEric Sandeen * require a full umount/remount for now. 5270ead6596bSEric Sandeen */ 5271ead6596bSEric Sandeen if (es->s_last_orphan) { 5272b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 5273ead6596bSEric Sandeen "remount RDWR because of unprocessed " 5274ead6596bSEric Sandeen "orphan inode list. Please " 5275b31e1552SEric Sandeen "umount/remount instead"); 5276ead6596bSEric Sandeen err = -EINVAL; 5277ead6596bSEric Sandeen goto restore_opts; 5278ead6596bSEric Sandeen } 5279ead6596bSEric Sandeen 5280ac27a0ecSDave Kleikamp /* 5281ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 5282ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 5283ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 5284ac27a0ecSDave Kleikamp * the partition.) 5285ac27a0ecSDave Kleikamp */ 52860390131bSFrank Mayhar if (sbi->s_journal) 5287617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 5288ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 5289c89128a0SJaegeuk Kim 5290c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 5291c89128a0SJaegeuk Kim if (err) 5292c89128a0SJaegeuk Kim goto restore_opts; 5293c89128a0SJaegeuk Kim 52941751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 5295e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 5296c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 5297c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 5298c5e06d10SJohann Lombardi err = -EROFS; 5299c5e06d10SJohann Lombardi goto restore_opts; 5300c5e06d10SJohann Lombardi } 5301c79d967dSChristoph Hellwig enable_quota = 1; 5302ac27a0ecSDave Kleikamp } 5303ac27a0ecSDave Kleikamp } 5304bfff6873SLukas Czerner 5305bfff6873SLukas Czerner /* 5306bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 5307bfff6873SLukas Czerner * current settings 5308bfff6873SLukas Czerner */ 5309bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 5310bfff6873SLukas Czerner ext4_unregister_li_request(sb); 5311bfff6873SLukas Czerner else { 5312bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 5313bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 5314bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 5315bfff6873SLukas Czerner } 5316bfff6873SLukas Czerner 53176fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 5318c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 5319c89128a0SJaegeuk Kim err = ext4_commit_super(sb, 1); 5320c89128a0SJaegeuk Kim if (err) 5321c89128a0SJaegeuk Kim goto restore_opts; 5322c89128a0SJaegeuk Kim } 53230390131bSFrank Mayhar 5324ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5325ac27a0ecSDave Kleikamp /* Release old quota file names */ 5326a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 5327ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 53287c319d32SAditya Kali if (enable_quota) { 53297c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 53300f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 5331e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 53327c319d32SAditya Kali err = ext4_enable_quotas(sb); 533307724f98STheodore Ts'o if (err) 53347c319d32SAditya Kali goto restore_opts; 53357c319d32SAditya Kali } 53367c319d32SAditya Kali } 53377c319d32SAditya Kali #endif 5338d4c402d9SCurt Wohlgemuth 53391751e8a6SLinus Torvalds *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME); 5340d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5341d4c402d9SCurt Wohlgemuth kfree(orig_data); 5342ac27a0ecSDave Kleikamp return 0; 53430b8e58a1SAndreas Dilger 5344ac27a0ecSDave Kleikamp restore_opts: 5345ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5346ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5347a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5348ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5349ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5350ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 535130773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 535230773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5353ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5354ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5355a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5356ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5357ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5358ac27a0ecSDave Kleikamp } 5359ac27a0ecSDave Kleikamp #endif 5360d4c402d9SCurt Wohlgemuth kfree(orig_data); 5361ac27a0ecSDave Kleikamp return err; 5362ac27a0ecSDave Kleikamp } 5363ac27a0ecSDave Kleikamp 5364689c958cSLi Xi #ifdef CONFIG_QUOTA 5365689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 5366689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 5367689c958cSLi Xi { 5368689c958cSLi Xi struct kqid qid; 5369689c958cSLi Xi struct dquot *dquot; 5370689c958cSLi Xi u64 limit; 5371689c958cSLi Xi u64 curblock; 5372689c958cSLi Xi 5373689c958cSLi Xi qid = make_kqid_projid(projid); 5374689c958cSLi Xi dquot = dqget(sb, qid); 5375689c958cSLi Xi if (IS_ERR(dquot)) 5376689c958cSLi Xi return PTR_ERR(dquot); 53777b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 5378689c958cSLi Xi 5379689c958cSLi Xi limit = (dquot->dq_dqb.dqb_bsoftlimit ? 5380689c958cSLi Xi dquot->dq_dqb.dqb_bsoftlimit : 5381689c958cSLi Xi dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; 5382689c958cSLi Xi if (limit && buf->f_blocks > limit) { 5383f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 5384f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 5385689c958cSLi Xi buf->f_blocks = limit; 5386689c958cSLi Xi buf->f_bfree = buf->f_bavail = 5387689c958cSLi Xi (buf->f_blocks > curblock) ? 5388689c958cSLi Xi (buf->f_blocks - curblock) : 0; 5389689c958cSLi Xi } 5390689c958cSLi Xi 5391689c958cSLi Xi limit = dquot->dq_dqb.dqb_isoftlimit ? 5392689c958cSLi Xi dquot->dq_dqb.dqb_isoftlimit : 5393689c958cSLi Xi dquot->dq_dqb.dqb_ihardlimit; 5394689c958cSLi Xi if (limit && buf->f_files > limit) { 5395689c958cSLi Xi buf->f_files = limit; 5396689c958cSLi Xi buf->f_ffree = 5397689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 5398689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 5399689c958cSLi Xi } 5400689c958cSLi Xi 54017b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 5402689c958cSLi Xi dqput(dquot); 5403689c958cSLi Xi return 0; 5404689c958cSLi Xi } 5405689c958cSLi Xi #endif 5406689c958cSLi Xi 5407617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5408ac27a0ecSDave Kleikamp { 5409ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5410617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5411617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 541227dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5413960cc398SPekka Enberg u64 fsid; 5414d02a9391SKazuya Mio s64 bfree; 541527dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5416ac27a0ecSDave Kleikamp 5417952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5418952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5419ac27a0ecSDave Kleikamp 5420617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5421ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5422b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 542357042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 542457042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5425d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 542657042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 542727dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 542827dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 542927dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5430ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5431ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 543252d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5433617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5434960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5435960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5436960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5437960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 54380b8e58a1SAndreas Dilger 5439689c958cSLi Xi #ifdef CONFIG_QUOTA 5440689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 5441689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 5442689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 5443689c958cSLi Xi #endif 5444ac27a0ecSDave Kleikamp return 0; 5445ac27a0ecSDave Kleikamp } 5446ac27a0ecSDave Kleikamp 5447ac27a0ecSDave Kleikamp 5448ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5449ac27a0ecSDave Kleikamp 5450bc8230eeSJan Kara /* 5451bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 5452bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 5453bc8230eeSJan Kara */ 5454ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5455ac27a0ecSDave Kleikamp { 54564c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5457ac27a0ecSDave Kleikamp } 5458ac27a0ecSDave Kleikamp 5459617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5460ac27a0ecSDave Kleikamp { 5461ac27a0ecSDave Kleikamp int ret, err; 5462ac27a0ecSDave Kleikamp handle_t *handle; 5463ac27a0ecSDave Kleikamp struct inode *inode; 5464ac27a0ecSDave Kleikamp 5465ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 54669924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5467617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5468ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5469ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5470ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5471617ba13bSMingming Cao err = ext4_journal_stop(handle); 5472ac27a0ecSDave Kleikamp if (!ret) 5473ac27a0ecSDave Kleikamp ret = err; 5474ac27a0ecSDave Kleikamp return ret; 5475ac27a0ecSDave Kleikamp } 5476ac27a0ecSDave Kleikamp 5477617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5478ac27a0ecSDave Kleikamp { 5479ac27a0ecSDave Kleikamp int ret, err; 5480ac27a0ecSDave Kleikamp handle_t *handle; 5481ac27a0ecSDave Kleikamp 54829924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5483617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5484ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5485ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5486ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5487617ba13bSMingming Cao err = ext4_journal_stop(handle); 5488ac27a0ecSDave Kleikamp if (!ret) 5489ac27a0ecSDave Kleikamp ret = err; 5490ac27a0ecSDave Kleikamp return ret; 5491ac27a0ecSDave Kleikamp } 5492ac27a0ecSDave Kleikamp 5493617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5494ac27a0ecSDave Kleikamp { 5495ac27a0ecSDave Kleikamp int ret, err; 5496ac27a0ecSDave Kleikamp handle_t *handle; 5497ac27a0ecSDave Kleikamp 54989924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5499617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 55009c3013e9SJan Kara if (IS_ERR(handle)) { 55019c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 55029c3013e9SJan Kara dquot_release(dquot); 5503ac27a0ecSDave Kleikamp return PTR_ERR(handle); 55049c3013e9SJan Kara } 5505ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5506617ba13bSMingming Cao err = ext4_journal_stop(handle); 5507ac27a0ecSDave Kleikamp if (!ret) 5508ac27a0ecSDave Kleikamp ret = err; 5509ac27a0ecSDave Kleikamp return ret; 5510ac27a0ecSDave Kleikamp } 5511ac27a0ecSDave Kleikamp 5512617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5513ac27a0ecSDave Kleikamp { 5514262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5515262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5516262b4662SJan Kara 55172c8be6b2SJan Kara /* Are we journaling quotas? */ 5518e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) || 5519262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5520ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5521617ba13bSMingming Cao return ext4_write_dquot(dquot); 5522ac27a0ecSDave Kleikamp } else { 5523ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5524ac27a0ecSDave Kleikamp } 5525ac27a0ecSDave Kleikamp } 5526ac27a0ecSDave Kleikamp 5527617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5528ac27a0ecSDave Kleikamp { 5529ac27a0ecSDave Kleikamp int ret, err; 5530ac27a0ecSDave Kleikamp handle_t *handle; 5531ac27a0ecSDave Kleikamp 5532ac27a0ecSDave Kleikamp /* Data block + inode block */ 55332b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 5534ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5535ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5536ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5537617ba13bSMingming Cao err = ext4_journal_stop(handle); 5538ac27a0ecSDave Kleikamp if (!ret) 5539ac27a0ecSDave Kleikamp ret = err; 5540ac27a0ecSDave Kleikamp return ret; 5541ac27a0ecSDave Kleikamp } 5542ac27a0ecSDave Kleikamp 5543ac27a0ecSDave Kleikamp /* 5544ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5545ac27a0ecSDave Kleikamp * the quota file and such... 5546ac27a0ecSDave Kleikamp */ 5547617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5548ac27a0ecSDave Kleikamp { 5549287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5550617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5551ac27a0ecSDave Kleikamp } 5552ac27a0ecSDave Kleikamp 5553daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 5554daf647d2STheodore Ts'o { 5555daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 5556daf647d2STheodore Ts'o 5557daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 5558daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 5559daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 5560daf647d2STheodore Ts'o * because the name of the lock is set using the 5561daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 5562daf647d2STheodore Ts'o */ 5563daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 5564daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 5565daf647d2STheodore Ts'o } 5566daf647d2STheodore Ts'o 5567ac27a0ecSDave Kleikamp /* 5568ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5569ac27a0ecSDave Kleikamp */ 5570617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 55718c54ca9cSAl Viro const struct path *path) 5572ac27a0ecSDave Kleikamp { 5573ac27a0ecSDave Kleikamp int err; 5574ac27a0ecSDave Kleikamp 5575ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5576ac27a0ecSDave Kleikamp return -EINVAL; 55770623543bSJan Kara 5578ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5579d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5580ac27a0ecSDave Kleikamp return -EXDEV; 55810623543bSJan Kara /* Journaling quota? */ 55820623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 55832b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5584f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5585b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5586b31e1552SEric Sandeen "Quota file not on filesystem root. " 5587b31e1552SEric Sandeen "Journaled quota will not work"); 558891389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 558991389240SJan Kara } else { 559091389240SJan Kara /* 559191389240SJan Kara * Clear the flag just in case mount options changed since 559291389240SJan Kara * last time. 559391389240SJan Kara */ 559491389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 55950623543bSJan Kara } 55960623543bSJan Kara 55970623543bSJan Kara /* 55980623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 55990623543bSJan Kara * all updates to the file when we bypass pagecache... 56000623543bSJan Kara */ 56010390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 56022b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 56030623543bSJan Kara /* 56040623543bSJan Kara * We don't need to lock updates but journal_flush() could 56050623543bSJan Kara * otherwise be livelocked... 56060623543bSJan Kara */ 56070623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 56087ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 56090623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5610f00c9e44SJan Kara if (err) 56117ffe1ea8SHidehiro Kawai return err; 56127ffe1ea8SHidehiro Kawai } 5613957153fcSJan Kara 5614daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 5615daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 5616957153fcSJan Kara if (err) { 5617daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 5618daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 5619957153fcSJan Kara } else { 5620957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 5621957153fcSJan Kara handle_t *handle; 5622957153fcSJan Kara 562361a92987SJan Kara /* 562461a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 562561a92987SJan Kara * files. If this fails, we return success anyway since quotas 562661a92987SJan Kara * are already enabled and this is not a hard failure. 562761a92987SJan Kara */ 5628957153fcSJan Kara inode_lock(inode); 5629957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 5630957153fcSJan Kara if (IS_ERR(handle)) 5631957153fcSJan Kara goto unlock_inode; 5632957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 5633957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 5634957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 5635957153fcSJan Kara ext4_mark_inode_dirty(handle, inode); 5636957153fcSJan Kara ext4_journal_stop(handle); 5637957153fcSJan Kara unlock_inode: 5638957153fcSJan Kara inode_unlock(inode); 5639957153fcSJan Kara } 5640daf647d2STheodore Ts'o return err; 5641ac27a0ecSDave Kleikamp } 5642ac27a0ecSDave Kleikamp 56437c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 56447c319d32SAditya Kali unsigned int flags) 56457c319d32SAditya Kali { 56467c319d32SAditya Kali int err; 56477c319d32SAditya Kali struct inode *qf_inode; 5648a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 56497c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5650689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5651689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 56527c319d32SAditya Kali }; 56537c319d32SAditya Kali 5654e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 56557c319d32SAditya Kali 56567c319d32SAditya Kali if (!qf_inums[type]) 56577c319d32SAditya Kali return -EPERM; 56587c319d32SAditya Kali 56597c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 56607c319d32SAditya Kali if (IS_ERR(qf_inode)) { 56617c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 56627c319d32SAditya Kali return PTR_ERR(qf_inode); 56637c319d32SAditya Kali } 56647c319d32SAditya Kali 5665bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5666bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 5667daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 56687c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 56697c319d32SAditya Kali iput(qf_inode); 5670daf647d2STheodore Ts'o if (err) 5671daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 56727c319d32SAditya Kali 56737c319d32SAditya Kali return err; 56747c319d32SAditya Kali } 56757c319d32SAditya Kali 56767c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 56777c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 56787c319d32SAditya Kali { 56797c319d32SAditya Kali int type, err = 0; 5680a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 56817c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5682689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5683689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 56847c319d32SAditya Kali }; 568549da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 568649da9392SJan Kara test_opt(sb, USRQUOTA), 568749da9392SJan Kara test_opt(sb, GRPQUOTA), 568849da9392SJan Kara test_opt(sb, PRJQUOTA), 568949da9392SJan Kara }; 56907c319d32SAditya Kali 569191389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 5692a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 56937c319d32SAditya Kali if (qf_inums[type]) { 56947c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 569549da9392SJan Kara DQUOT_USAGE_ENABLED | 569649da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 56977c319d32SAditya Kali if (err) { 56987c319d32SAditya Kali ext4_warning(sb, 569972ba7450STheodore Ts'o "Failed to enable quota tracking " 570072ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 570172ba7450STheodore Ts'o "e2fsck to fix.", type, err); 57027f144fd0SJunichi Uekawa for (type--; type >= 0; type--) 57037f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 57047f144fd0SJunichi Uekawa 57057c319d32SAditya Kali return err; 57067c319d32SAditya Kali } 57077c319d32SAditya Kali } 57087c319d32SAditya Kali } 57097c319d32SAditya Kali return 0; 57107c319d32SAditya Kali } 57117c319d32SAditya Kali 5712ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5713ca0e05e4SDmitry Monakhov { 571421f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 571521f97697SJan Kara handle_t *handle; 5716957153fcSJan Kara int err; 571721f97697SJan Kara 571887009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 571987009d86SDmitry Monakhov * Caller already holds s_umount sem */ 572087009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5721ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5722ca0e05e4SDmitry Monakhov 5723957153fcSJan Kara if (!inode || !igrab(inode)) 57240b268590SAmir Goldstein goto out; 57250b268590SAmir Goldstein 5726957153fcSJan Kara err = dquot_quota_off(sb, type); 5727964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 5728957153fcSJan Kara goto out_put; 5729957153fcSJan Kara 5730957153fcSJan Kara inode_lock(inode); 573161a92987SJan Kara /* 573261a92987SJan Kara * Update modification times of quota files when userspace can 573361a92987SJan Kara * start looking at them. If we fail, we return success anyway since 573461a92987SJan Kara * this is not a hard failure and quotas are already disabled. 573561a92987SJan Kara */ 57369924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 573721f97697SJan Kara if (IS_ERR(handle)) 5738957153fcSJan Kara goto out_unlock; 5739957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 5740957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 5741eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 574221f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 574321f97697SJan Kara ext4_journal_stop(handle); 5744957153fcSJan Kara out_unlock: 5745957153fcSJan Kara inode_unlock(inode); 5746957153fcSJan Kara out_put: 5747964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 5748957153fcSJan Kara iput(inode); 5749957153fcSJan Kara return err; 575021f97697SJan Kara out: 5751ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5752ca0e05e4SDmitry Monakhov } 5753ca0e05e4SDmitry Monakhov 5754ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5755ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5756ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5757ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5758617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5759ac27a0ecSDave Kleikamp size_t len, loff_t off) 5760ac27a0ecSDave Kleikamp { 5761ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5762725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5763ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5764ac27a0ecSDave Kleikamp int tocopy; 5765ac27a0ecSDave Kleikamp size_t toread; 5766ac27a0ecSDave Kleikamp struct buffer_head *bh; 5767ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5768ac27a0ecSDave Kleikamp 5769ac27a0ecSDave Kleikamp if (off > i_size) 5770ac27a0ecSDave Kleikamp return 0; 5771ac27a0ecSDave Kleikamp if (off+len > i_size) 5772ac27a0ecSDave Kleikamp len = i_size-off; 5773ac27a0ecSDave Kleikamp toread = len; 5774ac27a0ecSDave Kleikamp while (toread > 0) { 5775ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5776ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 57771c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 57781c215028STheodore Ts'o if (IS_ERR(bh)) 57791c215028STheodore Ts'o return PTR_ERR(bh); 5780ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5781ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5782ac27a0ecSDave Kleikamp else 5783ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5784ac27a0ecSDave Kleikamp brelse(bh); 5785ac27a0ecSDave Kleikamp offset = 0; 5786ac27a0ecSDave Kleikamp toread -= tocopy; 5787ac27a0ecSDave Kleikamp data += tocopy; 5788ac27a0ecSDave Kleikamp blk++; 5789ac27a0ecSDave Kleikamp } 5790ac27a0ecSDave Kleikamp return len; 5791ac27a0ecSDave Kleikamp } 5792ac27a0ecSDave Kleikamp 5793ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5794ac27a0ecSDave Kleikamp * enough credits) */ 5795617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5796ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5797ac27a0ecSDave Kleikamp { 5798ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5799725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 58001c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5801c5e298aeSTheodore Ts'o int retries = 0; 5802ac27a0ecSDave Kleikamp struct buffer_head *bh; 5803ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5804ac27a0ecSDave Kleikamp 58050390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5806b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5807b31e1552SEric Sandeen " cancelled because transaction is not started", 58089c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 58099c3013e9SJan Kara return -EIO; 58109c3013e9SJan Kara } 581167eeb568SDmitry Monakhov /* 581267eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 581367eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 581467eeb568SDmitry Monakhov */ 581567eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 581667eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 581767eeb568SDmitry Monakhov " cancelled because not block aligned", 581867eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 581967eeb568SDmitry Monakhov return -EIO; 582067eeb568SDmitry Monakhov } 582167eeb568SDmitry Monakhov 5822c5e298aeSTheodore Ts'o do { 5823c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 5824c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 5825c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 5826c5e298aeSTheodore Ts'o } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && 5827c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 58281c215028STheodore Ts'o if (IS_ERR(bh)) 58291c215028STheodore Ts'o return PTR_ERR(bh); 5830ac27a0ecSDave Kleikamp if (!bh) 5831ac27a0ecSDave Kleikamp goto out; 58325d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5833617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5834ac27a0ecSDave Kleikamp if (err) { 5835ac27a0ecSDave Kleikamp brelse(bh); 58361c215028STheodore Ts'o return err; 5837ac27a0ecSDave Kleikamp } 5838ac27a0ecSDave Kleikamp lock_buffer(bh); 583967eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5840ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5841ac27a0ecSDave Kleikamp unlock_buffer(bh); 58420390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5843ac27a0ecSDave Kleikamp brelse(bh); 5844ac27a0ecSDave Kleikamp out: 584567eeb568SDmitry Monakhov if (inode->i_size < off + len) { 584667eeb568SDmitry Monakhov i_size_write(inode, off + len); 5847617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5848617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 584921f97697SJan Kara } 585067eeb568SDmitry Monakhov return len; 5851ac27a0ecSDave Kleikamp } 5852ac27a0ecSDave Kleikamp 58538f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid) 58548f0e8746STheodore Ts'o { 58558f0e8746STheodore Ts'o const struct quota_format_ops *ops; 58568f0e8746STheodore Ts'o 58578f0e8746STheodore Ts'o if (!sb_has_quota_loaded(sb, qid->type)) 58588f0e8746STheodore Ts'o return -ESRCH; 58598f0e8746STheodore Ts'o ops = sb_dqopt(sb)->ops[qid->type]; 58608f0e8746STheodore Ts'o if (!ops || !ops->get_next_id) 58618f0e8746STheodore Ts'o return -ENOSYS; 58628f0e8746STheodore Ts'o return dquot_get_next_id(sb, qid); 58638f0e8746STheodore Ts'o } 5864ac27a0ecSDave Kleikamp #endif 5865ac27a0ecSDave Kleikamp 5866152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5867152a0836SAl Viro const char *dev_name, void *data) 5868ac27a0ecSDave Kleikamp { 5869152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5870ac27a0ecSDave Kleikamp } 5871ac27a0ecSDave Kleikamp 5872c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 587324b58424STheodore Ts'o static inline void register_as_ext2(void) 587424b58424STheodore Ts'o { 587524b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 587624b58424STheodore Ts'o if (err) 587724b58424STheodore Ts'o printk(KERN_WARNING 587824b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 587924b58424STheodore Ts'o } 588024b58424STheodore Ts'o 588124b58424STheodore Ts'o static inline void unregister_as_ext2(void) 588224b58424STheodore Ts'o { 588324b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 588424b58424STheodore Ts'o } 58852035e776STheodore Ts'o 58862035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 58872035e776STheodore Ts'o { 5888e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 58892035e776STheodore Ts'o return 0; 5890bc98a42cSDavid Howells if (sb_rdonly(sb)) 58912035e776STheodore Ts'o return 1; 5892e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 58932035e776STheodore Ts'o return 0; 58942035e776STheodore Ts'o return 1; 58952035e776STheodore Ts'o } 589624b58424STheodore Ts'o #else 589724b58424STheodore Ts'o static inline void register_as_ext2(void) { } 589824b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 58992035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 590024b58424STheodore Ts'o #endif 590124b58424STheodore Ts'o 590224b58424STheodore Ts'o static inline void register_as_ext3(void) 590324b58424STheodore Ts'o { 590424b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 590524b58424STheodore Ts'o if (err) 590624b58424STheodore Ts'o printk(KERN_WARNING 590724b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 590824b58424STheodore Ts'o } 590924b58424STheodore Ts'o 591024b58424STheodore Ts'o static inline void unregister_as_ext3(void) 591124b58424STheodore Ts'o { 591224b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 591324b58424STheodore Ts'o } 59142035e776STheodore Ts'o 59152035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 59162035e776STheodore Ts'o { 5917e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 59182035e776STheodore Ts'o return 0; 5919e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 59202035e776STheodore Ts'o return 0; 5921bc98a42cSDavid Howells if (sb_rdonly(sb)) 59222035e776STheodore Ts'o return 1; 5923e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 59242035e776STheodore Ts'o return 0; 59252035e776STheodore Ts'o return 1; 59262035e776STheodore Ts'o } 592724b58424STheodore Ts'o 592803010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5929ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 593003010a33STheodore Ts'o .name = "ext4", 5931152a0836SAl Viro .mount = ext4_mount, 5932ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5933ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5934ac27a0ecSDave Kleikamp }; 59357f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5936ac27a0ecSDave Kleikamp 5937e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5938e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5939e9e3bcecSEric Sandeen 59405dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5941ac27a0ecSDave Kleikamp { 5942e9e3bcecSEric Sandeen int i, err; 5943c9de560dSAlex Tomas 5944e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 594507c0c5d8SAl Viro ext4_li_info = NULL; 594607c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 594707c0c5d8SAl Viro 59489a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 594912e9b892SDmitry Monakhov ext4_check_flag_values(); 5950e9e3bcecSEric Sandeen 5951e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 5952e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5953e9e3bcecSEric Sandeen 595451865fdaSZheng Liu err = ext4_init_es(); 59556fd058f7STheodore Ts'o if (err) 59566fd058f7STheodore Ts'o return err; 595751865fdaSZheng Liu 5958*1dc0aa46SEric Whitney err = ext4_init_pending(); 5959*1dc0aa46SEric Whitney if (err) 5960*1dc0aa46SEric Whitney goto out6; 5961*1dc0aa46SEric Whitney 596251865fdaSZheng Liu err = ext4_init_pageio(); 596351865fdaSZheng Liu if (err) 5964b5799018STheodore Ts'o goto out5; 596551865fdaSZheng Liu 59665dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5967bd2d0210STheodore Ts'o if (err) 5968b5799018STheodore Ts'o goto out4; 5969857ac889SLukas Czerner 5970b5799018STheodore Ts'o err = ext4_init_sysfs(); 5971dd68314cSTheodore Ts'o if (err) 5972b5799018STheodore Ts'o goto out3; 5973857ac889SLukas Czerner 59745dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5975ac27a0ecSDave Kleikamp if (err) 5976c9de560dSAlex Tomas goto out2; 5977ac27a0ecSDave Kleikamp err = init_inodecache(); 5978ac27a0ecSDave Kleikamp if (err) 5979ac27a0ecSDave Kleikamp goto out1; 598024b58424STheodore Ts'o register_as_ext3(); 59812035e776STheodore Ts'o register_as_ext2(); 598203010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5983ac27a0ecSDave Kleikamp if (err) 5984ac27a0ecSDave Kleikamp goto out; 5985bfff6873SLukas Czerner 5986ac27a0ecSDave Kleikamp return 0; 5987ac27a0ecSDave Kleikamp out: 598824b58424STheodore Ts'o unregister_as_ext2(); 598924b58424STheodore Ts'o unregister_as_ext3(); 5990ac27a0ecSDave Kleikamp destroy_inodecache(); 5991ac27a0ecSDave Kleikamp out1: 59925dabfc78STheodore Ts'o ext4_exit_mballoc(); 59939c191f70ST Makphaibulchoke out2: 5994b5799018STheodore Ts'o ext4_exit_sysfs(); 5995b5799018STheodore Ts'o out3: 5996dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5997b5799018STheodore Ts'o out4: 59985dabfc78STheodore Ts'o ext4_exit_pageio(); 5999b5799018STheodore Ts'o out5: 6000*1dc0aa46SEric Whitney ext4_exit_pending(); 6001*1dc0aa46SEric Whitney out6: 600251865fdaSZheng Liu ext4_exit_es(); 600351865fdaSZheng Liu 6004ac27a0ecSDave Kleikamp return err; 6005ac27a0ecSDave Kleikamp } 6006ac27a0ecSDave Kleikamp 60075dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 6008ac27a0ecSDave Kleikamp { 6009bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 601024b58424STheodore Ts'o unregister_as_ext2(); 601124b58424STheodore Ts'o unregister_as_ext3(); 601203010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 6013ac27a0ecSDave Kleikamp destroy_inodecache(); 60145dabfc78STheodore Ts'o ext4_exit_mballoc(); 6015b5799018STheodore Ts'o ext4_exit_sysfs(); 60165dabfc78STheodore Ts'o ext4_exit_system_zone(); 60175dabfc78STheodore Ts'o ext4_exit_pageio(); 6018dd12ed14SEric Sandeen ext4_exit_es(); 6019*1dc0aa46SEric Whitney ext4_exit_pending(); 6020ac27a0ecSDave Kleikamp } 6021ac27a0ecSDave Kleikamp 6022ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 602383982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 6024ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 60257ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 60265dabfc78STheodore Ts'o module_init(ext4_init_fs) 60275dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 6028