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 315*6a0678a7SArnd Bergmann static void __ext4_update_tstamp(__le32 *lo, __u8 *hi) 316*6a0678a7SArnd Bergmann { 317*6a0678a7SArnd Bergmann time64_t now = ktime_get_real_seconds(); 318*6a0678a7SArnd Bergmann 319*6a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 320*6a0678a7SArnd Bergmann 321*6a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 322*6a0678a7SArnd Bergmann *hi = upper_32_bits(now); 323*6a0678a7SArnd Bergmann } 324*6a0678a7SArnd Bergmann 325*6a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 326*6a0678a7SArnd Bergmann { 327*6a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 328*6a0678a7SArnd Bergmann } 329*6a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 330*6a0678a7SArnd Bergmann __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 331*6a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 332*6a0678a7SArnd 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); 343*6a0678a7SArnd 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; 348*6a0678a7SArnd 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); 798db79e6d1SWang Shilong 799db79e6d1SWang Shilong if ((flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) && 800db79e6d1SWang Shilong !EXT4_MB_GRP_BBITMAP_CORRUPT(grp)) { 801db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 802db79e6d1SWang Shilong grp->bb_free); 803db79e6d1SWang Shilong set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 804db79e6d1SWang Shilong &grp->bb_state); 805db79e6d1SWang Shilong } 806db79e6d1SWang Shilong 807db79e6d1SWang Shilong if ((flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) && 808db79e6d1SWang Shilong !EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) { 809db79e6d1SWang Shilong if (gdp) { 810db79e6d1SWang Shilong int count; 811db79e6d1SWang Shilong 812db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 813db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 814db79e6d1SWang Shilong count); 815db79e6d1SWang Shilong } 816db79e6d1SWang Shilong set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 817db79e6d1SWang Shilong &grp->bb_state); 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)); 1043a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1044a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 104596c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1046a9e7f447SDmitry Monakhov #endif 10478aefcd55STheodore Ts'o ei->jinode = NULL; 10482e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1049744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1050b436b9beSJan Kara ei->i_sync_tid = 0; 1051b436b9beSJan Kara ei->i_datasync_tid = 0; 1052e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 10532e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1054ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1055ac27a0ecSDave Kleikamp } 1056ac27a0ecSDave Kleikamp 10577ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 10587ff9c073STheodore Ts'o { 10597ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 10607ff9c073STheodore Ts'o 10617ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 10627ff9c073STheodore Ts'o return drop; 10637ff9c073STheodore Ts'o } 10647ff9c073STheodore Ts'o 1065fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 1066fa0d7e3dSNick Piggin { 1067fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 1068fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1069fa0d7e3dSNick Piggin } 1070fa0d7e3dSNick Piggin 1071617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1072ac27a0ecSDave Kleikamp { 10739f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1074b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1075b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1076b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 10779f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 10789f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 10799f7dd93dSVasily Averin true); 10809f7dd93dSVasily Averin dump_stack(); 10819f7dd93dSVasily Averin } 1082fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 1083ac27a0ecSDave Kleikamp } 1084ac27a0ecSDave Kleikamp 108551cc5068SAlexey Dobriyan static void init_once(void *foo) 1086ac27a0ecSDave Kleikamp { 1087617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1088ac27a0ecSDave Kleikamp 1089ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1090ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 10910e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1092ea3d7209SJan Kara init_rwsem(&ei->i_mmap_sem); 1093ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1094ac27a0ecSDave Kleikamp } 1095ac27a0ecSDave Kleikamp 1096e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1097ac27a0ecSDave Kleikamp { 1098f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1099f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1100f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1101f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1102f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1103f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 110420c2df83SPaul Mundt init_once); 1105617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1106ac27a0ecSDave Kleikamp return -ENOMEM; 1107ac27a0ecSDave Kleikamp return 0; 1108ac27a0ecSDave Kleikamp } 1109ac27a0ecSDave Kleikamp 1110ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1111ac27a0ecSDave Kleikamp { 11128c0a8537SKirill A. Shutemov /* 11138c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 11148c0a8537SKirill A. Shutemov * destroy cache. 11158c0a8537SKirill A. Shutemov */ 11168c0a8537SKirill A. Shutemov rcu_barrier(); 1117617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1118ac27a0ecSDave Kleikamp } 1119ac27a0ecSDave Kleikamp 11200930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1121ac27a0ecSDave Kleikamp { 11220930fcc1SAl Viro invalidate_inode_buffers(inode); 1123dbd5768fSJan Kara clear_inode(inode); 11249f754758SChristoph Hellwig dquot_drop(inode); 1125c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 112651865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 11278aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 11288aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 11298aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 11308aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 11318aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 11328aefcd55STheodore Ts'o } 11333d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1134ac27a0ecSDave Kleikamp } 1135ac27a0ecSDave Kleikamp 11361b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 11371b961ac0SChristoph Hellwig u64 ino, u32 generation) 1138ac27a0ecSDave Kleikamp { 1139ac27a0ecSDave Kleikamp struct inode *inode; 1140ac27a0ecSDave Kleikamp 1141617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1142ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1143617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1144ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1145ac27a0ecSDave Kleikamp 1146ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1147ac27a0ecSDave Kleikamp * 1148617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1149ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1150ac27a0ecSDave Kleikamp * 1151ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1152ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1153ac27a0ecSDave Kleikamp */ 1154f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 11551d1fe1eeSDavid Howells if (IS_ERR(inode)) 11561d1fe1eeSDavid Howells return ERR_CAST(inode); 11571d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1158ac27a0ecSDave Kleikamp iput(inode); 1159ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1160ac27a0ecSDave Kleikamp } 11611b961ac0SChristoph Hellwig 11621b961ac0SChristoph Hellwig return inode; 1163ac27a0ecSDave Kleikamp } 11641b961ac0SChristoph Hellwig 11651b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 11661b961ac0SChristoph Hellwig int fh_len, int fh_type) 11671b961ac0SChristoph Hellwig { 11681b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 11691b961ac0SChristoph Hellwig ext4_nfs_get_inode); 11701b961ac0SChristoph Hellwig } 11711b961ac0SChristoph Hellwig 11721b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 11731b961ac0SChristoph Hellwig int fh_len, int fh_type) 11741b961ac0SChristoph Hellwig { 11751b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 11761b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1177ac27a0ecSDave Kleikamp } 1178ac27a0ecSDave Kleikamp 1179c39a7f84SToshiyuki Okajima /* 1180c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1181c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1182c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1183c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1184c39a7f84SToshiyuki Okajima */ 11850b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11860b8e58a1SAndreas Dilger gfp_t wait) 1187c39a7f84SToshiyuki Okajima { 1188c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1189c39a7f84SToshiyuki Okajima 1190c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1191c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1192c39a7f84SToshiyuki Okajima return 0; 1193c39a7f84SToshiyuki Okajima if (journal) 1194c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1195d0164adcSMel Gorman wait & ~__GFP_DIRECT_RECLAIM); 1196c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1197c39a7f84SToshiyuki Okajima } 1198c39a7f84SToshiyuki Okajima 1199a7550b30SJaegeuk Kim #ifdef CONFIG_EXT4_FS_ENCRYPTION 1200a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1201a7550b30SJaegeuk Kim { 1202a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1203a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1204a7550b30SJaegeuk Kim } 1205a7550b30SJaegeuk Kim 1206a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1207a7550b30SJaegeuk Kim void *fs_data) 1208a7550b30SJaegeuk Kim { 12092f8f5e76SEric Biggers handle_t *handle = fs_data; 1210c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1211a7550b30SJaegeuk Kim 12129ce0151aSEric Biggers /* 12139ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 12149ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 12159ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 12169ce0151aSEric Biggers * the filename "lost+found" itself. 12179ce0151aSEric Biggers */ 12189ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 12199ce0151aSEric Biggers return -EPERM; 1220a7550b30SJaegeuk Kim 12217d3e06a8SRoss Zwisler if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) 12227d3e06a8SRoss Zwisler return -EINVAL; 12237d3e06a8SRoss Zwisler 122494840e3cSEric Biggers res = ext4_convert_inline_data(inode); 122594840e3cSEric Biggers if (res) 122694840e3cSEric Biggers return res; 122794840e3cSEric Biggers 12282f8f5e76SEric Biggers /* 12292f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 12302f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 12312f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 12322f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 12332f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 12342f8f5e76SEric Biggers */ 12352f8f5e76SEric Biggers 12362f8f5e76SEric Biggers if (handle) { 12372f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 12382f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 12392f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 12402f8f5e76SEric Biggers ctx, len, 0); 1241a7550b30SJaegeuk Kim if (!res) { 1242a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1243a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1244a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1245a3caa24bSJan Kara /* 12462ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 12472ee6a576SEric Biggers * S_DAX may be disabled 1248a3caa24bSJan Kara */ 1249a3caa24bSJan Kara ext4_set_inode_flags(inode); 1250a7550b30SJaegeuk Kim } 1251a7550b30SJaegeuk Kim return res; 1252a7550b30SJaegeuk Kim } 1253a7550b30SJaegeuk Kim 1254b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1255b8cb5a54STahsin Erdogan if (res) 1256b8cb5a54STahsin Erdogan return res; 12572f8f5e76SEric Biggers retry: 1258af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1259af65207cSTahsin Erdogan &credits); 1260dec214d0STahsin Erdogan if (res) 1261dec214d0STahsin Erdogan return res; 1262dec214d0STahsin Erdogan 1263c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1264a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1265a7550b30SJaegeuk Kim return PTR_ERR(handle); 1266a7550b30SJaegeuk Kim 12672f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 12682f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 12692f8f5e76SEric Biggers ctx, len, 0); 1270a7550b30SJaegeuk Kim if (!res) { 1271a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 12722ee6a576SEric Biggers /* 12732ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 12742ee6a576SEric Biggers * S_DAX may be disabled 12752ee6a576SEric Biggers */ 1276a3caa24bSJan Kara ext4_set_inode_flags(inode); 1277a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1278a7550b30SJaegeuk Kim if (res) 1279a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1280a7550b30SJaegeuk Kim } 1281a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 12822f8f5e76SEric Biggers 12832f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 12842f8f5e76SEric Biggers goto retry; 1285a7550b30SJaegeuk Kim if (!res) 1286a7550b30SJaegeuk Kim res = res2; 1287a7550b30SJaegeuk Kim return res; 1288a7550b30SJaegeuk Kim } 1289a7550b30SJaegeuk Kim 1290c250b7ddSEric Biggers static bool ext4_dummy_context(struct inode *inode) 1291a7550b30SJaegeuk Kim { 1292a7550b30SJaegeuk Kim return DUMMY_ENCRYPTION_ENABLED(EXT4_SB(inode->i_sb)); 1293a7550b30SJaegeuk Kim } 1294a7550b30SJaegeuk Kim 12956f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1296a5d431efSEric Biggers .key_prefix = "ext4:", 1297a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1298a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1299a7550b30SJaegeuk Kim .dummy_context = ext4_dummy_context, 1300a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1301e12ee683SEric Biggers .max_namelen = EXT4_NAME_LEN, 1302a7550b30SJaegeuk Kim }; 1303a7550b30SJaegeuk Kim #endif 1304a7550b30SJaegeuk Kim 1305ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1306d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1307689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1308ac27a0ecSDave Kleikamp 1309617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1310617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1311617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1312617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1313617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 13146f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 13158c54ca9cSAl Viro const struct path *path); 1316617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1317617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1318ac27a0ecSDave Kleikamp size_t len, loff_t off); 1319617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1320ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 13217c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 13227c319d32SAditya Kali unsigned int flags); 13237c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 13248f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid); 1325ac27a0ecSDave Kleikamp 132696c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 132796c7e0d9SJan Kara { 132896c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 132996c7e0d9SJan Kara } 133096c7e0d9SJan Kara 133161e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 133260e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1333617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1334617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1335617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1336617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1337a5b5ee32SJan Kara .write_info = ext4_write_info, 1338a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1339a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1340040cb378SLi Xi .get_projid = ext4_get_projid, 13417a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 13428f0e8746STheodore Ts'o .get_next_id = ext4_get_next_id, 1343ac27a0ecSDave Kleikamp }; 1344ac27a0ecSDave Kleikamp 13450d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1346617ba13bSMingming Cao .quota_on = ext4_quota_on, 1347ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1348287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 13490a240339SJan Kara .get_state = dquot_get_state, 1350287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1351287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 13526332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 13536332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1354ac27a0ecSDave Kleikamp }; 1355ac27a0ecSDave Kleikamp #endif 1356ac27a0ecSDave Kleikamp 1357ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1358617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1359617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1360617ba13bSMingming Cao .write_inode = ext4_write_inode, 1361617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 13627ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 13630930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1364617ba13bSMingming Cao .put_super = ext4_put_super, 1365617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1366c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1367c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1368617ba13bSMingming Cao .statfs = ext4_statfs, 1369617ba13bSMingming Cao .remount_fs = ext4_remount, 1370617ba13bSMingming Cao .show_options = ext4_show_options, 1371ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1372617ba13bSMingming Cao .quota_read = ext4_quota_read, 1373617ba13bSMingming Cao .quota_write = ext4_quota_write, 137496c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1375ac27a0ecSDave Kleikamp #endif 1376c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1377ac27a0ecSDave Kleikamp }; 1378ac27a0ecSDave Kleikamp 137939655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 13801b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 13811b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1382617ba13bSMingming Cao .get_parent = ext4_get_parent, 1383ac27a0ecSDave Kleikamp }; 1384ac27a0ecSDave Kleikamp 1385ac27a0ecSDave Kleikamp enum { 1386ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1387ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 138872578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1389ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 139072578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1391ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1392ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1393ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 13946ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 1395ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 13965a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1397ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 139849da9392SJan Kara Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax, 1399327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 1400327eaf73STheodore Ts'o Opt_nowarn_on_error, Opt_mblk_io_submit, 1401670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 14021449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 14035328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1404744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1405fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1406cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 1407ac27a0ecSDave Kleikamp }; 1408ac27a0ecSDave Kleikamp 1409a447c093SSteven Whitehouse static const match_table_t tokens = { 1410ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1411ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1412ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1413ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1414ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1415ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1416ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1417ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1418ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1419ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1420ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1421ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1422ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1423ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 142472578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 142572578c33STheodore Ts'o {Opt_removed, "orlov"}, 1426ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1427ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1428ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1429ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1430e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 14315a916be1STheodore Ts'o {Opt_noload, "noload"}, 143272578c33STheodore Ts'o {Opt_removed, "nobh"}, 143372578c33STheodore Ts'o {Opt_removed, "bh"}, 1434ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 143530773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 143630773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1437ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1438ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1439818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1440c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1441818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1442ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1443ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1444ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1445ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 14465bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 14475bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1448ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1449ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1450ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1451ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1452ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1453ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 14545a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1455ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1456ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1457ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1458ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 145949da9392SJan Kara {Opt_prjquota, "prjquota"}, 1460ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 146106705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 146206705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 146325ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1464923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 1465c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 146664769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1467327eaf73STheodore Ts'o {Opt_warn_on_error, "warn_on_error"}, 1468327eaf73STheodore Ts'o {Opt_nowarn_on_error, "nowarn_on_error"}, 1469a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1470a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1471670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1472dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 147336ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 147436ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 14756fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 14766fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1477240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1478b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1479afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 148006705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 148106705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1482744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1483744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 14845328e635SEric Sandeen {Opt_discard, "discard"}, 14855328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1486fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1487fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1488fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1489df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 14906ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 1491cdb7ee4cSTahsin Erdogan {Opt_nombcache, "nombcache"}, 1492cdb7ee4cSTahsin Erdogan {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ 1493c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1494c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1495c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1496c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1497c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1498f3f12faaSJosef Bacik {Opt_err, NULL}, 1499ac27a0ecSDave Kleikamp }; 1500ac27a0ecSDave Kleikamp 1501617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1502ac27a0ecSDave Kleikamp { 1503617ba13bSMingming Cao ext4_fsblk_t sb_block; 1504ac27a0ecSDave Kleikamp char *options = (char *) *data; 1505ac27a0ecSDave Kleikamp 1506ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1507ac27a0ecSDave Kleikamp return 1; /* Default location */ 15080b8e58a1SAndreas Dilger 1509ac27a0ecSDave Kleikamp options += 3; 15100b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1511ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1512ac27a0ecSDave Kleikamp if (*options && *options != ',') { 15134776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1514ac27a0ecSDave Kleikamp (char *) *data); 1515ac27a0ecSDave Kleikamp return 1; 1516ac27a0ecSDave Kleikamp } 1517ac27a0ecSDave Kleikamp if (*options == ',') 1518ac27a0ecSDave Kleikamp options++; 1519ac27a0ecSDave Kleikamp *data = (void *) options; 15200b8e58a1SAndreas Dilger 1521ac27a0ecSDave Kleikamp return sb_block; 1522ac27a0ecSDave Kleikamp } 1523ac27a0ecSDave Kleikamp 1524b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1525d6006186SEric Biggers static const char deprecated_msg[] = 1526d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1527437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1528b3881f74STheodore Ts'o 152956c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 153056c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 153156c50f11SDmitry Monakhov { 153256c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 153356c50f11SDmitry Monakhov char *qname; 153403dafb5fSChen Gang int ret = -1; 153556c50f11SDmitry Monakhov 153656c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 153756c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 153856c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 153956c50f11SDmitry Monakhov "Cannot change journaled " 154056c50f11SDmitry Monakhov "quota options when quota turned on"); 154157f73c2cSTheodore Ts'o return -1; 154256c50f11SDmitry Monakhov } 1543e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1544c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, "Journaled quota options " 1545c325a67cSTheodore Ts'o "ignored when QUOTA feature is enabled"); 1546c325a67cSTheodore Ts'o return 1; 1547262b4662SJan Kara } 154856c50f11SDmitry Monakhov qname = match_strdup(args); 154956c50f11SDmitry Monakhov if (!qname) { 155056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 155156c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 155257f73c2cSTheodore Ts'o return -1; 155356c50f11SDmitry Monakhov } 155403dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 155503dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 155603dafb5fSChen Gang ret = 1; 155703dafb5fSChen Gang else 155856c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 155903dafb5fSChen Gang "%s quota file already specified", 156003dafb5fSChen Gang QTYPE2NAME(qtype)); 156103dafb5fSChen Gang goto errout; 156256c50f11SDmitry Monakhov } 156303dafb5fSChen Gang if (strchr(qname, '/')) { 156456c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 156556c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 156603dafb5fSChen Gang goto errout; 156756c50f11SDmitry Monakhov } 156803dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1569fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 157056c50f11SDmitry Monakhov return 1; 157103dafb5fSChen Gang errout: 157203dafb5fSChen Gang kfree(qname); 157303dafb5fSChen Gang return ret; 157456c50f11SDmitry Monakhov } 157556c50f11SDmitry Monakhov 157656c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 157756c50f11SDmitry Monakhov { 157856c50f11SDmitry Monakhov 157956c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 158056c50f11SDmitry Monakhov 158156c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 158256c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 158356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 158456c50f11SDmitry Monakhov " when quota turned on"); 158557f73c2cSTheodore Ts'o return -1; 158656c50f11SDmitry Monakhov } 158703dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 158856c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 158956c50f11SDmitry Monakhov return 1; 159056c50f11SDmitry Monakhov } 159156c50f11SDmitry Monakhov #endif 159256c50f11SDmitry Monakhov 159326092bf5STheodore Ts'o #define MOPT_SET 0x0001 159426092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 159526092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 159626092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 159726092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 159826092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 159926092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 160026092bf5STheodore Ts'o #define MOPT_Q 0 160126092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 160226092bf5STheodore Ts'o #else 160326092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 160426092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 160526092bf5STheodore Ts'o #endif 160626092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 16078dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 16088dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 16098dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1610ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 161126092bf5STheodore Ts'o 161226092bf5STheodore Ts'o static const struct mount_opts { 161326092bf5STheodore Ts'o int token; 161426092bf5STheodore Ts'o int mount_opt; 161526092bf5STheodore Ts'o int flags; 161626092bf5STheodore Ts'o } ext4_mount_opts[] = { 161726092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 161826092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 161926092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 162026092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 162126092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 162226092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 16238dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 16248dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 16258dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 16268dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 162726092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 162826092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 16298dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 16308dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 16318dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 163259d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1633327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 1634327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 1635c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1636c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 16378dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 16381e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 163926092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 16408dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 16411e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 16428dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 164326092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 164426092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 164526092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 16468dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 16477915a861SAles Novak MOPT_NO_EXT2}, 16488dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 16497915a861SAles Novak MOPT_NO_EXT2}, 165026092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 165126092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 165226092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 165326092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 165426092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 165526092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 165626092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 165726092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 165826092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 165926092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 1660923ae0ffSRoss Zwisler {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, 166126092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 16620efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 16630efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 16645ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 16655ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 16665ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 16678dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 16688dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 16698dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 16708dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 167126092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 167226092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 167326092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 167426092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 167526092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 167626092bf5STheodore Ts'o #else 167726092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 167826092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 167926092bf5STheodore Ts'o #endif 168026092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 168126092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 1682670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 168326092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 168426092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 168526092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 168626092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 168726092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 168849da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 168949da9392SJan Kara MOPT_SET | MOPT_Q}, 169026092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 169149da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 169249da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 169326092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 169426092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 169526092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 169626092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 169726092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 169826092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 169926092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1700df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 17016ddb2447STheodore Ts'o {Opt_test_dummy_encryption, 0, MOPT_GTE0}, 1702cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 170326092bf5STheodore Ts'o {Opt_err, 0, 0} 170426092bf5STheodore Ts'o }; 170526092bf5STheodore Ts'o 170626092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 170726092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 170826092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 170926092bf5STheodore Ts'o { 171026092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 171126092bf5STheodore Ts'o const struct mount_opts *m; 171208cefc7aSEric W. Biederman kuid_t uid; 171308cefc7aSEric W. Biederman kgid_t gid; 171426092bf5STheodore Ts'o int arg = 0; 171526092bf5STheodore Ts'o 171657f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 171757f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 171857f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 171957f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 172057f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 172157f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 172257f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 172357f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 172457f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 172557f73c2cSTheodore Ts'o #endif 172626092bf5STheodore Ts'o switch (token) { 1727f7048605STheodore Ts'o case Opt_noacl: 1728f7048605STheodore Ts'o case Opt_nouser_xattr: 1729f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1730f7048605STheodore Ts'o break; 173126092bf5STheodore Ts'o case Opt_sb: 173226092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 173326092bf5STheodore Ts'o case Opt_removed: 17345f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 173526092bf5STheodore Ts'o return 1; 173626092bf5STheodore Ts'o case Opt_abort: 173726092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 173826092bf5STheodore Ts'o return 1; 173926092bf5STheodore Ts'o case Opt_i_version: 1740357fdad0SMatthew Garrett sb->s_flags |= SB_I_VERSION; 174126092bf5STheodore Ts'o return 1; 1742a26f4992STheodore Ts'o case Opt_lazytime: 17431751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 1744a26f4992STheodore Ts'o return 1; 1745a26f4992STheodore Ts'o case Opt_nolazytime: 17461751e8a6SLinus Torvalds sb->s_flags &= ~SB_LAZYTIME; 1747a26f4992STheodore Ts'o return 1; 174826092bf5STheodore Ts'o } 174926092bf5STheodore Ts'o 17505f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 17515f3633e3SJan Kara if (token == m->token) 17525f3633e3SJan Kara break; 17535f3633e3SJan Kara 17545f3633e3SJan Kara if (m->token == Opt_err) { 17555f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 17565f3633e3SJan Kara "or missing value", opt); 17575f3633e3SJan Kara return -1; 17585f3633e3SJan Kara } 17595f3633e3SJan Kara 17608dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 17618dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 17628dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 17638dc0aa8cSTheodore Ts'o return -1; 17648dc0aa8cSTheodore Ts'o } 17658dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 17668dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 17678dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 17688dc0aa8cSTheodore Ts'o return -1; 17698dc0aa8cSTheodore Ts'o } 17708dc0aa8cSTheodore Ts'o 1771ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 17720efb3b23SJan Kara return -1; 177326092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 177426092bf5STheodore Ts'o return -1; 1775c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 1776c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 177726092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 17781e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 17791e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 1780c93cf2d7SDmitry Monakhov } else 1781c93cf2d7SDmitry Monakhov return -1; 1782c93cf2d7SDmitry Monakhov } 178326092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 178426092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 178526092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 178626092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 178726092bf5STheodore Ts'o "options when quota turned on"); 178826092bf5STheodore Ts'o return -1; 178926092bf5STheodore Ts'o } 179026092bf5STheodore Ts'o 179126092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 179226092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 179326092bf5STheodore Ts'o } else if (token == Opt_commit) { 179426092bf5STheodore Ts'o if (arg == 0) 179526092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 179626092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 1797670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 1798670e9875STheodore Ts'o sbi->s_want_extra_isize = arg; 179926092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 180026092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 180126092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 180226092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 180326092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1804e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1805e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1806e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1807e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 180826092bf5STheodore Ts'o return -1; 180926092bf5STheodore Ts'o } 181026092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 181126092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 181226092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 181326092bf5STheodore Ts'o if (!args->from) 181426092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 181526092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1816df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1817df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 181826092bf5STheodore Ts'o } else if (token == Opt_stripe) { 181926092bf5STheodore Ts'o sbi->s_stripe = arg; 18200efb3b23SJan Kara } else if (token == Opt_resuid) { 18210efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 18220efb3b23SJan Kara if (!uid_valid(uid)) { 18235f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 18240efb3b23SJan Kara return -1; 18250efb3b23SJan Kara } 18260efb3b23SJan Kara sbi->s_resuid = uid; 18270efb3b23SJan Kara } else if (token == Opt_resgid) { 18280efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 18290efb3b23SJan Kara if (!gid_valid(gid)) { 18305f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 18310efb3b23SJan Kara return -1; 18320efb3b23SJan Kara } 18330efb3b23SJan Kara sbi->s_resgid = gid; 18340efb3b23SJan Kara } else if (token == Opt_journal_dev) { 18350efb3b23SJan Kara if (is_remount) { 18360efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 18370efb3b23SJan Kara "Cannot specify journal on remount"); 18380efb3b23SJan Kara return -1; 18390efb3b23SJan Kara } 18400efb3b23SJan Kara *journal_devnum = arg; 1841ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1842ad4eec61SEric Sandeen char *journal_path; 1843ad4eec61SEric Sandeen struct inode *journal_inode; 1844ad4eec61SEric Sandeen struct path path; 1845ad4eec61SEric Sandeen int error; 1846ad4eec61SEric Sandeen 1847ad4eec61SEric Sandeen if (is_remount) { 1848ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1849ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1850ad4eec61SEric Sandeen return -1; 1851ad4eec61SEric Sandeen } 1852ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1853ad4eec61SEric Sandeen if (!journal_path) { 1854ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1855ad4eec61SEric Sandeen "journal device string"); 1856ad4eec61SEric Sandeen return -1; 1857ad4eec61SEric Sandeen } 1858ad4eec61SEric Sandeen 1859ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1860ad4eec61SEric Sandeen if (error) { 1861ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1862ad4eec61SEric Sandeen "journal device path: error %d", error); 1863ad4eec61SEric Sandeen kfree(journal_path); 1864ad4eec61SEric Sandeen return -1; 1865ad4eec61SEric Sandeen } 1866ad4eec61SEric Sandeen 18672b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 1868ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1869ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1870ad4eec61SEric Sandeen "is not a block device", journal_path); 1871ad4eec61SEric Sandeen path_put(&path); 1872ad4eec61SEric Sandeen kfree(journal_path); 1873ad4eec61SEric Sandeen return -1; 1874ad4eec61SEric Sandeen } 1875ad4eec61SEric Sandeen 1876ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1877ad4eec61SEric Sandeen path_put(&path); 1878ad4eec61SEric Sandeen kfree(journal_path); 18790efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 18800efb3b23SJan Kara if (arg > 7) { 18815f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 18820efb3b23SJan Kara " (must be 0-7)"); 18830efb3b23SJan Kara return -1; 18840efb3b23SJan Kara } 18850efb3b23SJan Kara *journal_ioprio = 18860efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 18876ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 18886ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 18896ddb2447STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; 18906ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 18916ddb2447STheodore Ts'o "Test dummy encryption mode enabled"); 18926ddb2447STheodore Ts'o #else 18936ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 18946ddb2447STheodore Ts'o "Test dummy encryption mount option ignored"); 18956ddb2447STheodore Ts'o #endif 189626092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 189726092bf5STheodore Ts'o if (is_remount) { 189826092bf5STheodore Ts'o if (!sbi->s_journal) 189926092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 19005f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 190126092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 190226092bf5STheodore Ts'o "Cannot change data mode on remount"); 190326092bf5STheodore Ts'o return -1; 190426092bf5STheodore Ts'o } 190526092bf5STheodore Ts'o } else { 190626092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 190726092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 190826092bf5STheodore Ts'o } 190926092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 191026092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 191126092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 191226092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 19135f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 19145f3633e3SJan Kara "quota options when quota turned on"); 191526092bf5STheodore Ts'o return -1; 191626092bf5STheodore Ts'o } 1917e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1918c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, 1919c325a67cSTheodore Ts'o "Quota format mount options ignored " 1920262b4662SJan Kara "when QUOTA feature is enabled"); 1921c325a67cSTheodore Ts'o return 1; 1922262b4662SJan Kara } 192326092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 192426092bf5STheodore Ts'o #endif 1925923ae0ffSRoss Zwisler } else if (token == Opt_dax) { 1926ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 1927ef83b6e8SDan Williams ext4_msg(sb, KERN_WARNING, 1928ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 1929ef83b6e8SDan Williams sbi->s_mount_opt |= m->mount_opt; 1930ef83b6e8SDan Williams #else 1931923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 1932923ae0ffSRoss Zwisler return -1; 1933923ae0ffSRoss Zwisler #endif 19347915a861SAles Novak } else if (token == Opt_data_err_abort) { 19357915a861SAles Novak sbi->s_mount_opt |= m->mount_opt; 19367915a861SAles Novak } else if (token == Opt_data_err_ignore) { 19377915a861SAles Novak sbi->s_mount_opt &= ~m->mount_opt; 193826092bf5STheodore Ts'o } else { 193926092bf5STheodore Ts'o if (!args->from) 194026092bf5STheodore Ts'o arg = 1; 194126092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 194226092bf5STheodore Ts'o arg = !arg; 194326092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 194426092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 194526092bf5STheodore Ts'o "buggy handling of option %s", opt); 194626092bf5STheodore Ts'o WARN_ON(1); 194726092bf5STheodore Ts'o return -1; 194826092bf5STheodore Ts'o } 194926092bf5STheodore Ts'o if (arg != 0) 195026092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 195126092bf5STheodore Ts'o else 195226092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 195326092bf5STheodore Ts'o } 195426092bf5STheodore Ts'o return 1; 195526092bf5STheodore Ts'o } 195626092bf5STheodore Ts'o 1957ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1958c3191067STheodore Ts'o unsigned long *journal_devnum, 1959b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1960661aa520SEric Sandeen int is_remount) 1961ac27a0ecSDave Kleikamp { 1962617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1963ac27a0ecSDave Kleikamp char *p; 1964ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 196526092bf5STheodore Ts'o int token; 1966ac27a0ecSDave Kleikamp 1967ac27a0ecSDave Kleikamp if (!options) 1968ac27a0ecSDave Kleikamp return 1; 1969ac27a0ecSDave Kleikamp 1970ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1971ac27a0ecSDave Kleikamp if (!*p) 1972ac27a0ecSDave Kleikamp continue; 197315121c18SEric Sandeen /* 197415121c18SEric Sandeen * Initialize args struct so we know whether arg was 197515121c18SEric Sandeen * found; some options take optional arguments. 197615121c18SEric Sandeen */ 1977caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1978ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 197926092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 198026092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1981ac27a0ecSDave Kleikamp return 0; 1982ac27a0ecSDave Kleikamp } 1983ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 198449da9392SJan Kara /* 198549da9392SJan Kara * We do the test below only for project quotas. 'usrquota' and 198649da9392SJan Kara * 'grpquota' mount options are allowed even without quota feature 198749da9392SJan Kara * to support legacy quotas in quota files. 198849da9392SJan Kara */ 198949da9392SJan Kara if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { 199049da9392SJan Kara ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " 199149da9392SJan Kara "Cannot enable project quota enforcement."); 199249da9392SJan Kara return 0; 199349da9392SJan Kara } 199449da9392SJan Kara if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1995482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1996fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1997ac27a0ecSDave Kleikamp 1998482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1999fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 2000ac27a0ecSDave Kleikamp 200156c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 2002b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 2003b31e1552SEric Sandeen "format mixing"); 2004ac27a0ecSDave Kleikamp return 0; 2005ac27a0ecSDave Kleikamp } 2006ac27a0ecSDave Kleikamp 2007ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 2008b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 2009b31e1552SEric Sandeen "not specified"); 2010ac27a0ecSDave Kleikamp return 0; 2011ac27a0ecSDave Kleikamp } 2012ac27a0ecSDave Kleikamp } 2013ac27a0ecSDave Kleikamp #endif 2014261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 2015261cb20cSJan Kara int blocksize = 2016261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 2017261cb20cSJan Kara 201809cbfeafSKirill A. Shutemov if (blocksize < PAGE_SIZE) { 2019261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 2020261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 2021261cb20cSJan Kara return 0; 2022261cb20cSJan Kara } 2023261cb20cSJan Kara } 2024ac27a0ecSDave Kleikamp return 1; 2025ac27a0ecSDave Kleikamp } 2026ac27a0ecSDave Kleikamp 20272adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 20282adf6da8STheodore Ts'o struct super_block *sb) 20292adf6da8STheodore Ts'o { 20302adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 20312adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 20322adf6da8STheodore Ts'o 20332adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 20342adf6da8STheodore Ts'o char *fmtname = ""; 20352adf6da8STheodore Ts'o 20362adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 20372adf6da8STheodore Ts'o case QFMT_VFS_OLD: 20382adf6da8STheodore Ts'o fmtname = "vfsold"; 20392adf6da8STheodore Ts'o break; 20402adf6da8STheodore Ts'o case QFMT_VFS_V0: 20412adf6da8STheodore Ts'o fmtname = "vfsv0"; 20422adf6da8STheodore Ts'o break; 20432adf6da8STheodore Ts'o case QFMT_VFS_V1: 20442adf6da8STheodore Ts'o fmtname = "vfsv1"; 20452adf6da8STheodore Ts'o break; 20462adf6da8STheodore Ts'o } 20472adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 20482adf6da8STheodore Ts'o } 20492adf6da8STheodore Ts'o 20502adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 2051a068acf2SKees Cook seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); 20522adf6da8STheodore Ts'o 20532adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 2054a068acf2SKees Cook seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); 20552adf6da8STheodore Ts'o #endif 20562adf6da8STheodore Ts'o } 20572adf6da8STheodore Ts'o 20585a916be1STheodore Ts'o static const char *token2str(int token) 20595a916be1STheodore Ts'o { 206050df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 20615a916be1STheodore Ts'o 20625a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 20635a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 20645a916be1STheodore Ts'o break; 20655a916be1STheodore Ts'o return t->pattern; 20665a916be1STheodore Ts'o } 20675a916be1STheodore Ts'o 20682adf6da8STheodore Ts'o /* 20692adf6da8STheodore Ts'o * Show an option if 20702adf6da8STheodore Ts'o * - it's set to a non-default value OR 20712adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 20722adf6da8STheodore Ts'o */ 207366acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 207466acdcf4STheodore Ts'o int nodefs) 20752adf6da8STheodore Ts'o { 20762adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 20772adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 207868afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 20795a916be1STheodore Ts'o const struct mount_opts *m; 208066acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 20812adf6da8STheodore Ts'o 208266acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 208366acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 20842adf6da8STheodore Ts'o 20852adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 20865a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 20875a916be1STheodore Ts'o 20885a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 20895a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 20905a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 20915a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 20925a916be1STheodore Ts'o continue; 209368afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 20945a916be1STheodore Ts'o continue; /* skip if same as the default */ 20955a916be1STheodore Ts'o if ((want_set && 20965a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 20975a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 20985a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 20995a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 21005a916be1STheodore Ts'o } 21015a916be1STheodore Ts'o 210208cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 21035a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 210408cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 210508cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 210608cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 21075a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 210808cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 210908cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 211066acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 21115a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 21125a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 21132adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 21145a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 21152adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 21165a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 211766acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 21185a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 211966acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 21205a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 212166acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 21225a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 2123357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 21245a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 212566acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 21265a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 212768afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 212868afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 21292adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 21305a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 21312adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 21325a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 21332adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 21345a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 21355a916be1STheodore Ts'o } 213666acdcf4STheodore Ts'o if (nodefs || 213766acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 21385a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 21392adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 21402adf6da8STheodore Ts'o 2141ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 214266acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 21435a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2144df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2145df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 21467915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 21477915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 21482adf6da8STheodore Ts'o 21492adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 21502adf6da8STheodore Ts'o return 0; 21512adf6da8STheodore Ts'o } 21522adf6da8STheodore Ts'o 215366acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 215466acdcf4STheodore Ts'o { 215566acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 215666acdcf4STheodore Ts'o } 215766acdcf4STheodore Ts'o 2158ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 215966acdcf4STheodore Ts'o { 216066acdcf4STheodore Ts'o struct super_block *sb = seq->private; 216166acdcf4STheodore Ts'o int rc; 216266acdcf4STheodore Ts'o 2163bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 216466acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 216566acdcf4STheodore Ts'o seq_puts(seq, "\n"); 216666acdcf4STheodore Ts'o return rc; 216766acdcf4STheodore Ts'o } 216866acdcf4STheodore Ts'o 2169617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 2170ac27a0ecSDave Kleikamp int read_only) 2171ac27a0ecSDave Kleikamp { 2172617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2173c89128a0SJaegeuk Kim int err = 0; 2174ac27a0ecSDave Kleikamp 2175617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 2176b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 2177b31e1552SEric Sandeen "forcing read-only mode"); 2178c89128a0SJaegeuk Kim err = -EROFS; 2179ac27a0ecSDave Kleikamp } 2180ac27a0ecSDave Kleikamp if (read_only) 2181281b5995STheodore Ts'o goto done; 2182617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 2183b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 2184b31e1552SEric Sandeen "running e2fsck is recommended"); 2185c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 2186b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2187b31e1552SEric Sandeen "warning: mounting fs with errors, " 2188b31e1552SEric Sandeen "running e2fsck is recommended"); 2189ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 2190ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 2191ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 2192b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2193b31e1552SEric Sandeen "warning: maximal mount count reached, " 2194b31e1552SEric Sandeen "running e2fsck is recommended"); 2195ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 2196*6a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 2197*6a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 2198b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2199b31e1552SEric Sandeen "warning: checktime reached, " 2200b31e1552SEric Sandeen "running e2fsck is recommended"); 22010390131bSFrank Mayhar if (!sbi->s_journal) 2202216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 2203ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 2204617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 2205e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 2206*6a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 2207617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 22080390131bSFrank Mayhar if (sbi->s_journal) 2209e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 2210ac27a0ecSDave Kleikamp 2211c89128a0SJaegeuk Kim err = ext4_commit_super(sb, 1); 2212281b5995STheodore Ts'o done: 2213ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2214a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2215a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2216ac27a0ecSDave Kleikamp sb->s_blocksize, 2217ac27a0ecSDave Kleikamp sbi->s_groups_count, 2218617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2219617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2220a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2221ac27a0ecSDave Kleikamp 22227abc52c2SDan Magenheimer cleancache_init_fs(sb); 2223c89128a0SJaegeuk Kim return err; 2224ac27a0ecSDave Kleikamp } 2225ac27a0ecSDave Kleikamp 2226117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 2227117fff10STheodore Ts'o { 2228117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 2229117fff10STheodore Ts'o struct flex_groups *new_groups; 2230117fff10STheodore Ts'o int size; 2231117fff10STheodore Ts'o 2232117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 2233117fff10STheodore Ts'o return 0; 2234117fff10STheodore Ts'o 2235117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 2236117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 2237117fff10STheodore Ts'o return 0; 2238117fff10STheodore Ts'o 2239117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 2240a7c3e901SMichal Hocko new_groups = kvzalloc(size, GFP_KERNEL); 2241117fff10STheodore Ts'o if (!new_groups) { 2242117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 2243117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 2244117fff10STheodore Ts'o return -ENOMEM; 2245117fff10STheodore Ts'o } 2246117fff10STheodore Ts'o 2247117fff10STheodore Ts'o if (sbi->s_flex_groups) { 2248117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 2249117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 2250117fff10STheodore Ts'o sizeof(struct flex_groups))); 2251b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 2252117fff10STheodore Ts'o } 2253117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 2254117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 2255117fff10STheodore Ts'o return 0; 2256117fff10STheodore Ts'o } 2257117fff10STheodore Ts'o 2258772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2259772cb7c8SJose R. Santos { 2260772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2261772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 2262772cb7c8SJose R. Santos ext4_group_t flex_group; 2263117fff10STheodore Ts'o int i, err; 2264772cb7c8SJose R. Santos 2265503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2266d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2267772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2268772cb7c8SJose R. Santos return 1; 2269772cb7c8SJose R. Santos } 2270772cb7c8SJose R. Santos 2271117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2272117fff10STheodore Ts'o if (err) 2273772cb7c8SJose R. Santos goto failed; 2274772cb7c8SJose R. Santos 2275772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 227688b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2277772cb7c8SJose R. Santos 2278772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 22797ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 22807ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 228190ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 228224aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 22837ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 22847ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2285772cb7c8SJose R. Santos } 2286772cb7c8SJose R. Santos 2287772cb7c8SJose R. Santos return 1; 2288772cb7c8SJose R. Santos failed: 2289772cb7c8SJose R. Santos return 0; 2290772cb7c8SJose R. Santos } 2291772cb7c8SJose R. Santos 2292e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2293717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2294717d50e4SAndreas Dilger { 2295b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 2296717d50e4SAndreas Dilger __u16 crc = 0; 2297717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2298e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 2299717d50e4SAndreas Dilger 23009aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2301feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2302feb0ab32SDarrick J. Wong __u32 csum32; 2303b47820edSDaeho Jeong __u16 dummy_csum = 0; 2304feb0ab32SDarrick J. Wong 2305feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2306feb0ab32SDarrick J. Wong sizeof(le_group)); 2307b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 2308b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 2309b47820edSDaeho Jeong sizeof(dummy_csum)); 2310b47820edSDaeho Jeong offset += sizeof(dummy_csum); 2311b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 2312b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 2313b47820edSDaeho Jeong sbi->s_desc_size - offset); 2314feb0ab32SDarrick J. Wong 2315feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2316feb0ab32SDarrick J. Wong goto out; 2317feb0ab32SDarrick J. Wong } 2318feb0ab32SDarrick J. Wong 2319feb0ab32SDarrick J. Wong /* old crc16 code */ 2320e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 2321813d32f9SDarrick J. Wong return 0; 2322813d32f9SDarrick J. Wong 2323717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2324717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2325717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2326717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2327717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2328e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 2329717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2330717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2331717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2332717d50e4SAndreas Dilger offset); 2333717d50e4SAndreas Dilger 2334feb0ab32SDarrick J. Wong out: 2335717d50e4SAndreas Dilger return cpu_to_le16(crc); 2336717d50e4SAndreas Dilger } 2337717d50e4SAndreas Dilger 2338feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2339717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2340717d50e4SAndreas Dilger { 2341feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2342e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 2343717d50e4SAndreas Dilger return 0; 2344717d50e4SAndreas Dilger 2345717d50e4SAndreas Dilger return 1; 2346717d50e4SAndreas Dilger } 2347717d50e4SAndreas Dilger 2348feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2349feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2350feb0ab32SDarrick J. Wong { 2351feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2352feb0ab32SDarrick J. Wong return; 2353e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 2354feb0ab32SDarrick J. Wong } 2355feb0ab32SDarrick J. Wong 2356ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2357bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2358829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 2359bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2360ac27a0ecSDave Kleikamp { 2361617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2362617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2363617ba13bSMingming Cao ext4_fsblk_t last_block; 236444de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 2365bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2366bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2367bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2368ce421581SJose R. Santos int flexbg_flag = 0; 2369bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2370ac27a0ecSDave Kleikamp 2371e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 2372ce421581SJose R. Santos flexbg_flag = 1; 2373ce421581SJose R. Santos 2374617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2375ac27a0ecSDave Kleikamp 2376197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2377197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2378197cd65aSAkinobu Mita 2379ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2380bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2381ac27a0ecSDave Kleikamp else 2382ac27a0ecSDave Kleikamp last_block = first_block + 2383617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2384ac27a0ecSDave Kleikamp 2385bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2386bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2387bfff6873SLukas Czerner grp = i; 2388bfff6873SLukas Czerner 23898fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 2390829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 2391829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2392829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 2393829fa70dSTheodore Ts'o "superblock", i); 239418db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 239518db4b4eSTheodore Ts'o return 0; 2396829fa70dSTheodore Ts'o } 239777260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 239877260807STheodore Ts'o block_bitmap <= last_bg_block) { 239977260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 240077260807STheodore Ts'o "Block bitmap for group %u overlaps " 240177260807STheodore Ts'o "block group descriptors", i); 240277260807STheodore Ts'o if (!sb_rdonly(sb)) 240377260807STheodore Ts'o return 0; 240477260807STheodore Ts'o } 24052b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2406b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2407a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2408b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2409ac27a0ecSDave Kleikamp return 0; 2410ac27a0ecSDave Kleikamp } 24118fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 2412829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 2413829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2414829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 2415829fa70dSTheodore Ts'o "superblock", i); 241618db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 241718db4b4eSTheodore Ts'o return 0; 2418829fa70dSTheodore Ts'o } 241977260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 242077260807STheodore Ts'o inode_bitmap <= last_bg_block) { 242177260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 242277260807STheodore Ts'o "Inode bitmap for group %u overlaps " 242377260807STheodore Ts'o "block group descriptors", i); 242477260807STheodore Ts'o if (!sb_rdonly(sb)) 242577260807STheodore Ts'o return 0; 242677260807STheodore Ts'o } 24272b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2428b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2429a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2430b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2431ac27a0ecSDave Kleikamp return 0; 2432ac27a0ecSDave Kleikamp } 24338fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2434829fa70dSTheodore Ts'o if (inode_table == sb_block) { 2435829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2436829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 2437829fa70dSTheodore Ts'o "superblock", i); 243818db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 243918db4b4eSTheodore Ts'o return 0; 2440829fa70dSTheodore Ts'o } 244177260807STheodore Ts'o if (inode_table >= sb_block + 1 && 244277260807STheodore Ts'o inode_table <= last_bg_block) { 244377260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 244477260807STheodore Ts'o "Inode table for group %u overlaps " 244577260807STheodore Ts'o "block group descriptors", i); 244677260807STheodore Ts'o if (!sb_rdonly(sb)) 244777260807STheodore Ts'o return 0; 244877260807STheodore Ts'o } 2449bd81d8eeSLaurent Vivier if (inode_table < first_block || 24502b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2451b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2452a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2453b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2454ac27a0ecSDave Kleikamp return 0; 2455ac27a0ecSDave Kleikamp } 2456955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2457feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2458b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2459b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2460e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 2461fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 2462bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 2463955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2464717d50e4SAndreas Dilger return 0; 2465717d50e4SAndreas Dilger } 24667ee1ec4cSLi Zefan } 2467955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2468ce421581SJose R. Santos if (!flexbg_flag) 2469617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2470ac27a0ecSDave Kleikamp } 2471bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2472bfff6873SLukas Czerner *first_not_zeroed = grp; 2473ac27a0ecSDave Kleikamp return 1; 2474ac27a0ecSDave Kleikamp } 2475ac27a0ecSDave Kleikamp 2476617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2477ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2478ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2479ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2480ac27a0ecSDave Kleikamp * 2481ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2482ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2483ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2484ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2485ac27a0ecSDave Kleikamp * 2486ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2487ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2488ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2489617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2490ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2491ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2492ac27a0ecSDave Kleikamp */ 2493617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2494617ba13bSMingming Cao struct ext4_super_block *es) 2495ac27a0ecSDave Kleikamp { 2496ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 24972c98eb5eSTheodore Ts'o int ret, nr_orphans = 0, nr_truncates = 0; 2498ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 249995f1fda4Szhangyi (F) int quota_update = 0; 2500ac27a0ecSDave Kleikamp int i; 2501ac27a0ecSDave Kleikamp #endif 2502ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2503ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2504ac27a0ecSDave Kleikamp return; 2505ac27a0ecSDave Kleikamp } 2506ac27a0ecSDave Kleikamp 2507a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2508b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2509b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2510a8f48a95SEric Sandeen return; 2511a8f48a95SEric Sandeen } 2512a8f48a95SEric Sandeen 2513d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2514d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2515d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2516d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2517d39195c3SAmir Goldstein return; 2518d39195c3SAmir Goldstein } 2519d39195c3SAmir Goldstein 2520617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2521c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 25221751e8a6SLinus Torvalds if (es->s_last_orphan && !(s_flags & SB_RDONLY)) { 252384474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2524ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2525ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2526c25f9bc6SEric Sandeen } 2527ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2528ac27a0ecSDave Kleikamp return; 2529ac27a0ecSDave Kleikamp } 2530ac27a0ecSDave Kleikamp 25311751e8a6SLinus Torvalds if (s_flags & SB_RDONLY) { 2532b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 25331751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 2534ac27a0ecSDave Kleikamp } 2535ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2536ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 25371751e8a6SLinus Torvalds sb->s_flags |= SB_ACTIVE; 253895f1fda4Szhangyi (F) 253995f1fda4Szhangyi (F) /* 254095f1fda4Szhangyi (F) * Turn on quotas which were not enabled for read-only mounts if 254195f1fda4Szhangyi (F) * filesystem has quota feature, so that they are updated correctly. 254295f1fda4Szhangyi (F) */ 25431751e8a6SLinus Torvalds if (ext4_has_feature_quota(sb) && (s_flags & SB_RDONLY)) { 254495f1fda4Szhangyi (F) int ret = ext4_enable_quotas(sb); 254595f1fda4Szhangyi (F) 254695f1fda4Szhangyi (F) if (!ret) 254795f1fda4Szhangyi (F) quota_update = 1; 254895f1fda4Szhangyi (F) else 254995f1fda4Szhangyi (F) ext4_msg(sb, KERN_ERR, 255095f1fda4Szhangyi (F) "Cannot turn on quotas: error %d", ret); 255195f1fda4Szhangyi (F) } 255295f1fda4Szhangyi (F) 255395f1fda4Szhangyi (F) /* Turn on journaled quotas used for old sytle */ 2554a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2555617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2556617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 255795f1fda4Szhangyi (F) 255895f1fda4Szhangyi (F) if (!ret) 255995f1fda4Szhangyi (F) quota_update = 1; 256095f1fda4Szhangyi (F) else 2561b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2562b31e1552SEric Sandeen "Cannot turn on journaled " 256395f1fda4Szhangyi (F) "quota: type %d: error %d", i, ret); 2564ac27a0ecSDave Kleikamp } 2565ac27a0ecSDave Kleikamp } 2566ac27a0ecSDave Kleikamp #endif 2567ac27a0ecSDave Kleikamp 2568ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2569ac27a0ecSDave Kleikamp struct inode *inode; 2570ac27a0ecSDave Kleikamp 2571c65d5c6cSVegard Nossum /* 2572c65d5c6cSVegard Nossum * We may have encountered an error during cleanup; if 2573c65d5c6cSVegard Nossum * so, skip the rest. 2574c65d5c6cSVegard Nossum */ 2575c65d5c6cSVegard Nossum if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2576c65d5c6cSVegard Nossum jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2577c65d5c6cSVegard Nossum es->s_last_orphan = 0; 2578c65d5c6cSVegard Nossum break; 2579c65d5c6cSVegard Nossum } 2580c65d5c6cSVegard Nossum 258197bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 258297bd42b9SJosef Bacik if (IS_ERR(inode)) { 2583ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2584ac27a0ecSDave Kleikamp break; 2585ac27a0ecSDave Kleikamp } 2586ac27a0ecSDave Kleikamp 2587617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2588871a2931SChristoph Hellwig dquot_initialize(inode); 2589ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2590566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2591b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2592b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 259346e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2594e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2595ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 25965955102cSAl Viro inode_lock(inode); 259755f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 25982c98eb5eSTheodore Ts'o ret = ext4_truncate(inode); 25992c98eb5eSTheodore Ts'o if (ret) 26002c98eb5eSTheodore Ts'o ext4_std_error(inode->i_sb, ret); 26015955102cSAl Viro inode_unlock(inode); 2602ac27a0ecSDave Kleikamp nr_truncates++; 2603ac27a0ecSDave Kleikamp } else { 2604566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2605b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2606b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 260746e665e9SHarvey Harrison __func__, inode->i_ino); 2608ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2609ac27a0ecSDave Kleikamp inode->i_ino); 2610ac27a0ecSDave Kleikamp nr_orphans++; 2611ac27a0ecSDave Kleikamp } 2612ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2613ac27a0ecSDave Kleikamp } 2614ac27a0ecSDave Kleikamp 2615ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2616ac27a0ecSDave Kleikamp 2617ac27a0ecSDave Kleikamp if (nr_orphans) 2618b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2619b31e1552SEric Sandeen PLURAL(nr_orphans)); 2620ac27a0ecSDave Kleikamp if (nr_truncates) 2621b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2622b31e1552SEric Sandeen PLURAL(nr_truncates)); 2623ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 262495f1fda4Szhangyi (F) /* Turn off quotas if they were enabled for orphan cleanup */ 262595f1fda4Szhangyi (F) if (quota_update) { 2626a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 262795f1fda4Szhangyi (F) if (sb_dqopt(sb)->files[i]) 2628287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2629ac27a0ecSDave Kleikamp } 263095f1fda4Szhangyi (F) } 2631ac27a0ecSDave Kleikamp #endif 26321751e8a6SLinus Torvalds sb->s_flags = s_flags; /* Restore SB_RDONLY status */ 2633ac27a0ecSDave Kleikamp } 26340b8e58a1SAndreas Dilger 2635cd2291a4SEric Sandeen /* 2636cd2291a4SEric Sandeen * Maximal extent format file size. 2637cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2638cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2639cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2640cd2291a4SEric Sandeen * so that won't be a limiting factor. 2641cd2291a4SEric Sandeen * 2642f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2643f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2644f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2645f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2646f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2647f17722f9SLukas Czerner * 2648cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2649cd2291a4SEric Sandeen */ 2650f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2651cd2291a4SEric Sandeen { 2652cd2291a4SEric Sandeen loff_t res; 2653cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2654cd2291a4SEric Sandeen 2655cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2656f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2657cd2291a4SEric Sandeen /* 265890c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2659cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2660cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2661cd2291a4SEric Sandeen */ 2662cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2663cd2291a4SEric Sandeen 2664cd2291a4SEric Sandeen /* total blocks in file system block size */ 2665cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2666cd2291a4SEric Sandeen upper_limit <<= blkbits; 2667cd2291a4SEric Sandeen } 2668cd2291a4SEric Sandeen 2669f17722f9SLukas Czerner /* 2670f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2671f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2672f17722f9SLukas Czerner * size 2673f17722f9SLukas Czerner */ 2674f17722f9SLukas Czerner res = (1LL << 32) - 1; 2675cd2291a4SEric Sandeen res <<= blkbits; 2676cd2291a4SEric Sandeen 2677cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2678cd2291a4SEric Sandeen if (res > upper_limit) 2679cd2291a4SEric Sandeen res = upper_limit; 2680cd2291a4SEric Sandeen 2681cd2291a4SEric Sandeen return res; 2682cd2291a4SEric Sandeen } 2683ac27a0ecSDave Kleikamp 2684ac27a0ecSDave Kleikamp /* 2685cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 26860fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 26870fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2688ac27a0ecSDave Kleikamp */ 2689f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2690ac27a0ecSDave Kleikamp { 2691617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 26920fc1b451SAneesh Kumar K.V int meta_blocks; 26930fc1b451SAneesh Kumar K.V loff_t upper_limit; 26940b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 26950b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 26960b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 26970b8e58a1SAndreas Dilger * 26980b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 26990b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 27000fc1b451SAneesh Kumar K.V */ 27010fc1b451SAneesh Kumar K.V 2702f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 27030fc1b451SAneesh Kumar K.V /* 270490c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 27050b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 27060b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 27070fc1b451SAneesh Kumar K.V */ 27080fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 27090fc1b451SAneesh Kumar K.V 27100fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 27110fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 27120fc1b451SAneesh Kumar K.V 27130fc1b451SAneesh Kumar K.V } else { 27148180a562SAneesh Kumar K.V /* 27158180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 27168180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 27178180a562SAneesh Kumar K.V * represent total number of blocks in 27188180a562SAneesh Kumar K.V * file system block size 27198180a562SAneesh Kumar K.V */ 27200fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 27210fc1b451SAneesh Kumar K.V 27220fc1b451SAneesh Kumar K.V } 27230fc1b451SAneesh Kumar K.V 27240fc1b451SAneesh Kumar K.V /* indirect blocks */ 27250fc1b451SAneesh Kumar K.V meta_blocks = 1; 27260fc1b451SAneesh Kumar K.V /* double indirect blocks */ 27270fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 27280fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 27290fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 27300fc1b451SAneesh Kumar K.V 27310fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 27320fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2733ac27a0ecSDave Kleikamp 2734ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2735ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2736ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2737ac27a0ecSDave Kleikamp res <<= bits; 2738ac27a0ecSDave Kleikamp if (res > upper_limit) 2739ac27a0ecSDave Kleikamp res = upper_limit; 27400fc1b451SAneesh Kumar K.V 27410fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 27420fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 27430fc1b451SAneesh Kumar K.V 2744ac27a0ecSDave Kleikamp return res; 2745ac27a0ecSDave Kleikamp } 2746ac27a0ecSDave Kleikamp 2747617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 274870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2749ac27a0ecSDave Kleikamp { 2750617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2751fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2752ac27a0ecSDave Kleikamp int has_super = 0; 2753ac27a0ecSDave Kleikamp 2754ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2755ac27a0ecSDave Kleikamp 2756e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 275770bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2758ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2759617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2760ac27a0ecSDave Kleikamp has_super = 1; 27610b8e58a1SAndreas Dilger 2762bd63f6b0SDarrick J. Wong /* 2763bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2764bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2765bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2766bd63f6b0SDarrick J. Wong * compensate. 2767bd63f6b0SDarrick J. Wong */ 2768bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 276949598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 2770bd63f6b0SDarrick J. Wong has_super++; 2771bd63f6b0SDarrick J. Wong 2772617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2773ac27a0ecSDave Kleikamp } 2774ac27a0ecSDave Kleikamp 2775c9de560dSAlex Tomas /** 2776c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2777c9de560dSAlex Tomas * @sbi: In memory super block info 2778c9de560dSAlex Tomas * 2779c9de560dSAlex Tomas * If we have specified it via mount option, then 2780c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2781c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2782c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2783c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2784c9de560dSAlex Tomas * 2785c9de560dSAlex Tomas */ 2786c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2787c9de560dSAlex Tomas { 2788c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2789c9de560dSAlex Tomas unsigned long stripe_width = 2790c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 27913eb08658SDan Ehrenberg int ret; 2792c9de560dSAlex Tomas 2793c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 27943eb08658SDan Ehrenberg ret = sbi->s_stripe; 27955469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 27963eb08658SDan Ehrenberg ret = stripe_width; 27975469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 27983eb08658SDan Ehrenberg ret = stride; 27993eb08658SDan Ehrenberg else 28003eb08658SDan Ehrenberg ret = 0; 2801c9de560dSAlex Tomas 28023eb08658SDan Ehrenberg /* 28033eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 28043eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 28053eb08658SDan Ehrenberg */ 28063eb08658SDan Ehrenberg if (ret <= 1) 28073eb08658SDan Ehrenberg ret = 0; 2808c9de560dSAlex Tomas 28093eb08658SDan Ehrenberg return ret; 2810c9de560dSAlex Tomas } 2811ac27a0ecSDave Kleikamp 2812a13fb1a4SEric Sandeen /* 2813a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2814a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2815a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2816a13fb1a4SEric Sandeen * 0 if it cannot be. 2817a13fb1a4SEric Sandeen */ 2818a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2819a13fb1a4SEric Sandeen { 2820e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 2821a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2822a13fb1a4SEric Sandeen "Couldn't mount because of " 2823a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2824a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2825a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2826a13fb1a4SEric Sandeen return 0; 2827a13fb1a4SEric Sandeen } 2828a13fb1a4SEric Sandeen 2829a13fb1a4SEric Sandeen if (readonly) 2830a13fb1a4SEric Sandeen return 1; 2831a13fb1a4SEric Sandeen 2832e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 28332cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 28341751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 28352cb5cc8bSDarrick J. Wong return 1; 28362cb5cc8bSDarrick J. Wong } 28372cb5cc8bSDarrick J. Wong 2838a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2839e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 2840a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2841a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2842a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2843a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2844a13fb1a4SEric Sandeen return 0; 2845a13fb1a4SEric Sandeen } 2846a13fb1a4SEric Sandeen /* 2847a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2848a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2849a13fb1a4SEric Sandeen */ 2850e2b911c5SDarrick J. Wong if (ext4_has_feature_huge_file(sb)) { 2851a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2852a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2853a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2854a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2855a13fb1a4SEric Sandeen return 0; 2856a13fb1a4SEric Sandeen } 2857a13fb1a4SEric Sandeen } 2858e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 2859bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2860bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2861bab08ab9STheodore Ts'o "extents feature\n"); 2862bab08ab9STheodore Ts'o return 0; 2863bab08ab9STheodore Ts'o } 28647c319d32SAditya Kali 28657c319d32SAditya Kali #ifndef CONFIG_QUOTA 2866e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !readonly) { 28677c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 28687c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 28697c319d32SAditya Kali "without CONFIG_QUOTA"); 28707c319d32SAditya Kali return 0; 28717c319d32SAditya Kali } 2872689c958cSLi Xi if (ext4_has_feature_project(sb) && !readonly) { 2873689c958cSLi Xi ext4_msg(sb, KERN_ERR, 2874689c958cSLi Xi "Filesystem with project quota feature cannot be mounted RDWR " 2875689c958cSLi Xi "without CONFIG_QUOTA"); 2876689c958cSLi Xi return 0; 2877689c958cSLi Xi } 28787c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2879a13fb1a4SEric Sandeen return 1; 2880a13fb1a4SEric Sandeen } 2881a13fb1a4SEric Sandeen 288266e61a9eSTheodore Ts'o /* 288366e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 288466e61a9eSTheodore Ts'o * on the file system 288566e61a9eSTheodore Ts'o */ 2886235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 288766e61a9eSTheodore Ts'o { 2888235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 2889235699a8SKees Cook struct super_block *sb = sbi->s_sb; 2890235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 289166e61a9eSTheodore Ts'o 289266e61a9eSTheodore Ts'o if (es->s_error_count) 2893ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2894ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 289566e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 289666e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2897*6a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 2898*6a0678a7SArnd Bergmann sb->s_id, 2899*6a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 290066e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 290166e61a9eSTheodore Ts'o es->s_first_error_func, 290266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 290366e61a9eSTheodore Ts'o if (es->s_first_error_ino) 2904651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 290566e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 290666e61a9eSTheodore Ts'o if (es->s_first_error_block) 2907651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 290866e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 2909651e1c3bSJoe Perches printk(KERN_CONT "\n"); 291066e61a9eSTheodore Ts'o } 291166e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2912*6a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 2913*6a0678a7SArnd Bergmann sb->s_id, 2914*6a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 291566e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 291666e61a9eSTheodore Ts'o es->s_last_error_func, 291766e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 291866e61a9eSTheodore Ts'o if (es->s_last_error_ino) 2919651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 292066e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 292166e61a9eSTheodore Ts'o if (es->s_last_error_block) 2922651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 292366e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 2924651e1c3bSJoe Perches printk(KERN_CONT "\n"); 292566e61a9eSTheodore Ts'o } 292666e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 292766e61a9eSTheodore Ts'o } 292866e61a9eSTheodore Ts'o 2929bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2930bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2931bfff6873SLukas Czerner { 2932bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2933bfff6873SLukas Czerner ext4_group_t group, ngroups; 2934bfff6873SLukas Czerner struct super_block *sb; 2935bfff6873SLukas Czerner unsigned long timeout = 0; 2936bfff6873SLukas Czerner int ret = 0; 2937bfff6873SLukas Czerner 2938bfff6873SLukas Czerner sb = elr->lr_super; 2939bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2940bfff6873SLukas Czerner 2941bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2942bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2943bfff6873SLukas Czerner if (!gdp) { 2944bfff6873SLukas Czerner ret = 1; 2945bfff6873SLukas Czerner break; 2946bfff6873SLukas Czerner } 2947bfff6873SLukas Czerner 2948bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2949bfff6873SLukas Czerner break; 2950bfff6873SLukas Czerner } 2951bfff6873SLukas Czerner 29527f511862STheodore Ts'o if (group >= ngroups) 2953bfff6873SLukas Czerner ret = 1; 2954bfff6873SLukas Czerner 2955bfff6873SLukas Czerner if (!ret) { 2956bfff6873SLukas Czerner timeout = jiffies; 2957bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2958bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2959bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 296051ce6511SLukas Czerner timeout = (jiffies - timeout) * 296151ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2962bfff6873SLukas Czerner elr->lr_timeout = timeout; 2963bfff6873SLukas Czerner } 2964bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2965bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2966bfff6873SLukas Czerner } 2967bfff6873SLukas Czerner return ret; 2968bfff6873SLukas Czerner } 2969bfff6873SLukas Czerner 2970bfff6873SLukas Czerner /* 2971bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 29724ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2973bfff6873SLukas Czerner */ 2974bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2975bfff6873SLukas Czerner { 2976bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2977bfff6873SLukas Czerner 2978bfff6873SLukas Czerner if (!elr) 2979bfff6873SLukas Czerner return; 2980bfff6873SLukas Czerner 2981bfff6873SLukas Czerner sbi = elr->lr_sbi; 2982bfff6873SLukas Czerner 2983bfff6873SLukas Czerner list_del(&elr->lr_request); 2984bfff6873SLukas Czerner sbi->s_li_request = NULL; 2985bfff6873SLukas Czerner kfree(elr); 2986bfff6873SLukas Czerner } 2987bfff6873SLukas Czerner 2988bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2989bfff6873SLukas Czerner { 29901bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 29911bb933fbSLukas Czerner if (!ext4_li_info) { 29921bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2993bfff6873SLukas Czerner return; 29941bb933fbSLukas Czerner } 2995bfff6873SLukas Czerner 2996bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 29971bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2998bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 29991bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3000bfff6873SLukas Czerner } 3001bfff6873SLukas Czerner 30028f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 30038f1f7453SEric Sandeen 3004bfff6873SLukas Czerner /* 3005bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3006bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3007bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3008bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3009bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3010bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3011bfff6873SLukas Czerner * next waking time and put itself into sleep. 3012bfff6873SLukas Czerner */ 3013bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3014bfff6873SLukas Czerner { 3015bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 3016bfff6873SLukas Czerner struct list_head *pos, *n; 3017bfff6873SLukas Czerner struct ext4_li_request *elr; 30184ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3019bfff6873SLukas Czerner 3020bfff6873SLukas Czerner BUG_ON(NULL == eli); 3021bfff6873SLukas Czerner 3022bfff6873SLukas Czerner cont_thread: 3023bfff6873SLukas Czerner while (true) { 3024bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3025bfff6873SLukas Czerner 3026bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3027bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3028bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3029bfff6873SLukas Czerner goto exit_thread; 3030bfff6873SLukas Czerner } 3031bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3032e22834f0SDmitry Monakhov int err = 0; 3033e22834f0SDmitry Monakhov int progress = 0; 3034bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3035bfff6873SLukas Czerner lr_request); 3036bfff6873SLukas Czerner 3037e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3038e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3039e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3040e22834f0SDmitry Monakhov continue; 3041e22834f0SDmitry Monakhov } 3042e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3043e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3044e22834f0SDmitry Monakhov progress = 1; 3045e22834f0SDmitry Monakhov /* 3046e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3047e22834f0SDmitry Monakhov * be removed from the list, it is 3048e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3049e22834f0SDmitry Monakhov */ 3050e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3051e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3052e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3053e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3054e22834f0SDmitry Monakhov n = pos->next; 3055e22834f0SDmitry Monakhov } 3056e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3057e22834f0SDmitry Monakhov } 3058b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3059e22834f0SDmitry Monakhov if (err) { 3060bfff6873SLukas Czerner ext4_remove_li_request(elr); 3061bfff6873SLukas Czerner continue; 3062bfff6873SLukas Czerner } 3063e22834f0SDmitry Monakhov if (!progress) { 3064e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3065e22834f0SDmitry Monakhov (prandom_u32() 3066e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3067b2c78cd0STheodore Ts'o } 3068bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3069bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3070bfff6873SLukas Czerner } 3071bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3072bfff6873SLukas Czerner 3073a0acae0eSTejun Heo try_to_freeze(); 3074bfff6873SLukas Czerner 30754ed5c033SLukas Czerner cur = jiffies; 30764ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3077f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3078bfff6873SLukas Czerner cond_resched(); 3079bfff6873SLukas Czerner continue; 3080bfff6873SLukas Czerner } 3081bfff6873SLukas Czerner 30824ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 30834ed5c033SLukas Czerner 30848f1f7453SEric Sandeen if (kthread_should_stop()) { 30858f1f7453SEric Sandeen ext4_clear_request_list(); 30868f1f7453SEric Sandeen goto exit_thread; 30878f1f7453SEric Sandeen } 3088bfff6873SLukas Czerner } 3089bfff6873SLukas Czerner 3090bfff6873SLukas Czerner exit_thread: 3091bfff6873SLukas Czerner /* 3092bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3093bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3094bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3095bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3096bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3097bfff6873SLukas Czerner * new one. 3098bfff6873SLukas Czerner */ 3099bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3100bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3101bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3102bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3103bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3104bfff6873SLukas Czerner goto cont_thread; 3105bfff6873SLukas Czerner } 3106bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3107bfff6873SLukas Czerner kfree(ext4_li_info); 3108bfff6873SLukas Czerner ext4_li_info = NULL; 3109bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3110bfff6873SLukas Czerner 3111bfff6873SLukas Czerner return 0; 3112bfff6873SLukas Czerner } 3113bfff6873SLukas Czerner 3114bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3115bfff6873SLukas Czerner { 3116bfff6873SLukas Czerner struct list_head *pos, *n; 3117bfff6873SLukas Czerner struct ext4_li_request *elr; 3118bfff6873SLukas Czerner 3119bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3120bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3121bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3122bfff6873SLukas Czerner lr_request); 3123bfff6873SLukas Czerner ext4_remove_li_request(elr); 3124bfff6873SLukas Czerner } 3125bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3126bfff6873SLukas Czerner } 3127bfff6873SLukas Czerner 3128bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3129bfff6873SLukas Czerner { 31308f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 31318f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 31328f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 31338f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3134bfff6873SLukas Czerner ext4_clear_request_list(); 3135bfff6873SLukas Czerner kfree(ext4_li_info); 3136bfff6873SLukas Czerner ext4_li_info = NULL; 313792b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3138bfff6873SLukas Czerner "initialization thread\n", 3139bfff6873SLukas Czerner err); 3140bfff6873SLukas Czerner return err; 3141bfff6873SLukas Czerner } 3142bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3143bfff6873SLukas Czerner return 0; 3144bfff6873SLukas Czerner } 3145bfff6873SLukas Czerner 3146bfff6873SLukas Czerner /* 3147bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3148bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3149bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3150bfff6873SLukas Czerner * groups and return total number of groups. 3151bfff6873SLukas Czerner */ 3152bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3153bfff6873SLukas Czerner { 3154bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3155bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3156bfff6873SLukas Czerner 31578844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 31588844618dSTheodore Ts'o return ngroups; 31598844618dSTheodore Ts'o 3160bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3161bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3162bfff6873SLukas Czerner if (!gdp) 3163bfff6873SLukas Czerner continue; 3164bfff6873SLukas Czerner 316550122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3166bfff6873SLukas Czerner break; 3167bfff6873SLukas Czerner } 3168bfff6873SLukas Czerner 3169bfff6873SLukas Czerner return group; 3170bfff6873SLukas Czerner } 3171bfff6873SLukas Czerner 3172bfff6873SLukas Czerner static int ext4_li_info_new(void) 3173bfff6873SLukas Czerner { 3174bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3175bfff6873SLukas Czerner 3176bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3177bfff6873SLukas Czerner if (!eli) 3178bfff6873SLukas Czerner return -ENOMEM; 3179bfff6873SLukas Czerner 3180bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3181bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3182bfff6873SLukas Czerner 3183bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3184bfff6873SLukas Czerner 3185bfff6873SLukas Czerner ext4_li_info = eli; 3186bfff6873SLukas Czerner 3187bfff6873SLukas Czerner return 0; 3188bfff6873SLukas Czerner } 3189bfff6873SLukas Czerner 3190bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3191bfff6873SLukas Czerner ext4_group_t start) 3192bfff6873SLukas Czerner { 3193bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3194bfff6873SLukas Czerner struct ext4_li_request *elr; 3195bfff6873SLukas Czerner 3196bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3197bfff6873SLukas Czerner if (!elr) 3198bfff6873SLukas Czerner return NULL; 3199bfff6873SLukas Czerner 3200bfff6873SLukas Czerner elr->lr_super = sb; 3201bfff6873SLukas Czerner elr->lr_sbi = sbi; 3202bfff6873SLukas Czerner elr->lr_next_group = start; 3203bfff6873SLukas Czerner 3204bfff6873SLukas Czerner /* 3205bfff6873SLukas Czerner * Randomize first schedule time of the request to 3206bfff6873SLukas Czerner * spread the inode table initialization requests 3207bfff6873SLukas Czerner * better. 3208bfff6873SLukas Czerner */ 3209dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3210dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3211bfff6873SLukas Czerner return elr; 3212bfff6873SLukas Czerner } 3213bfff6873SLukas Czerner 32147f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3215bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3216bfff6873SLukas Czerner { 3217bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 32187f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 321949598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 32206c5a6cb9SAndrew Morton int ret = 0; 3221bfff6873SLukas Czerner 32227f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 322351ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 322451ce6511SLukas Czerner /* 322551ce6511SLukas Czerner * Reset timeout so it can be computed again, because 322651ce6511SLukas Czerner * s_li_wait_mult might have changed. 322751ce6511SLukas Czerner */ 322851ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 32297f511862STheodore Ts'o goto out; 323051ce6511SLukas Czerner } 3231bfff6873SLukas Czerner 3232bc98a42cSDavid Howells if (first_not_zeroed == ngroups || sb_rdonly(sb) || 323355ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 32347f511862STheodore Ts'o goto out; 3235bfff6873SLukas Czerner 3236bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 32377f511862STheodore Ts'o if (!elr) { 32387f511862STheodore Ts'o ret = -ENOMEM; 32397f511862STheodore Ts'o goto out; 32407f511862STheodore Ts'o } 3241bfff6873SLukas Czerner 3242bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3243bfff6873SLukas Czerner ret = ext4_li_info_new(); 3244bfff6873SLukas Czerner if (ret) 3245bfff6873SLukas Czerner goto out; 3246bfff6873SLukas Czerner } 3247bfff6873SLukas Czerner 3248bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3249bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3250bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3251bfff6873SLukas Czerner 3252bfff6873SLukas Czerner sbi->s_li_request = elr; 325346e4690bSTao Ma /* 325446e4690bSTao Ma * set elr to NULL here since it has been inserted to 325546e4690bSTao Ma * the request_list and the removal and free of it is 325646e4690bSTao Ma * handled by ext4_clear_request_list from now on. 325746e4690bSTao Ma */ 325846e4690bSTao Ma elr = NULL; 3259bfff6873SLukas Czerner 3260bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3261bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3262bfff6873SLukas Czerner if (ret) 3263bfff6873SLukas Czerner goto out; 3264bfff6873SLukas Czerner } 3265bfff6873SLukas Czerner out: 3266bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3267beed5ecbSNicolas Kaiser if (ret) 3268bfff6873SLukas Czerner kfree(elr); 3269bfff6873SLukas Czerner return ret; 3270bfff6873SLukas Czerner } 3271bfff6873SLukas Czerner 3272bfff6873SLukas Czerner /* 3273bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3274bfff6873SLukas Czerner * module unload. 3275bfff6873SLukas Czerner */ 3276bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3277bfff6873SLukas Czerner { 3278bfff6873SLukas Czerner /* 3279bfff6873SLukas Czerner * If thread exited earlier 3280bfff6873SLukas Czerner * there's nothing to be done. 3281bfff6873SLukas Czerner */ 32828f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3283bfff6873SLukas Czerner return; 3284bfff6873SLukas Czerner 32858f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3286bfff6873SLukas Czerner } 3287bfff6873SLukas Czerner 328825ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 328925ed6e8aSDarrick J. Wong { 329025ed6e8aSDarrick J. Wong int ret = 1; 329125ed6e8aSDarrick J. Wong int compat, incompat; 329225ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 329325ed6e8aSDarrick J. Wong 32949aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3295db9ee220SDarrick J. Wong /* journal checksum v3 */ 329625ed6e8aSDarrick J. Wong compat = 0; 3297db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 329825ed6e8aSDarrick J. Wong } else { 329925ed6e8aSDarrick J. Wong /* journal checksum v1 */ 330025ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 330125ed6e8aSDarrick J. Wong incompat = 0; 330225ed6e8aSDarrick J. Wong } 330325ed6e8aSDarrick J. Wong 3304feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3305feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3306feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3307feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 330825ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 330925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 331025ed6e8aSDarrick J. Wong compat, 0, 331125ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 331225ed6e8aSDarrick J. Wong incompat); 331325ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 331425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 331525ed6e8aSDarrick J. Wong compat, 0, 331625ed6e8aSDarrick J. Wong incompat); 331725ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 331825ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 331925ed6e8aSDarrick J. Wong } else { 3320feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3321feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 332225ed6e8aSDarrick J. Wong } 332325ed6e8aSDarrick J. Wong 332425ed6e8aSDarrick J. Wong return ret; 332525ed6e8aSDarrick J. Wong } 332625ed6e8aSDarrick J. Wong 3327952fc18eSTheodore Ts'o /* 3328952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3329952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3330952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3331952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3332952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3333952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3334952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3335952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3336952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3337952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3338952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3339952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3340952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3341952fc18eSTheodore Ts'o */ 3342952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3343952fc18eSTheodore Ts'o char *buf) 3344952fc18eSTheodore Ts'o { 3345952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3346952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3347952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3348952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3349952fc18eSTheodore Ts'o int s, j, count = 0; 3350952fc18eSTheodore Ts'o 3351e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 33520548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 33530548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 33540548bbb8STheodore Ts'o 3355952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3356952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3357952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3358952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3359952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3360952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3361952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3362952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3363952fc18eSTheodore Ts'o count++; 3364952fc18eSTheodore Ts'o } 3365952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3366952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3367952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3368952fc18eSTheodore Ts'o count++; 3369952fc18eSTheodore Ts'o } 3370952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3371952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3372952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3373952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3374952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3375952fc18eSTheodore Ts'o count++; 3376952fc18eSTheodore Ts'o } 3377952fc18eSTheodore Ts'o if (i != grp) 3378952fc18eSTheodore Ts'o continue; 3379952fc18eSTheodore Ts'o s = 0; 3380952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3381952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3382952fc18eSTheodore Ts'o count++; 3383952fc18eSTheodore Ts'o } 3384c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 3385c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 3386c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 3387c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 3388c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 3389952fc18eSTheodore Ts'o } 3390c48ae41bSTheodore Ts'o count += j; 3391c48ae41bSTheodore Ts'o for (; j > 0; j--) 3392c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3393952fc18eSTheodore Ts'o } 3394952fc18eSTheodore Ts'o if (!count) 3395952fc18eSTheodore Ts'o return 0; 3396952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3397952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3398952fc18eSTheodore Ts'o } 3399952fc18eSTheodore Ts'o 3400952fc18eSTheodore Ts'o /* 3401952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3402952fc18eSTheodore Ts'o */ 3403952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3404952fc18eSTheodore Ts'o { 3405952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3406952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 34073c816dedSEric Whitney struct inode *j_inode; 34083c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 3409952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3410952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 34114fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3412952fc18eSTheodore Ts'o 3413952fc18eSTheodore Ts'o if (!buf) 3414952fc18eSTheodore Ts'o return -ENOMEM; 3415952fc18eSTheodore Ts'o 3416952fc18eSTheodore Ts'o /* 3417952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3418952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3419952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3420952fc18eSTheodore Ts'o */ 3421952fc18eSTheodore Ts'o 3422952fc18eSTheodore Ts'o /* 3423952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3424952fc18eSTheodore Ts'o */ 3425952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3426952fc18eSTheodore Ts'o 3427952fc18eSTheodore Ts'o /* 3428952fc18eSTheodore Ts'o * Add the overhead found in each block group 3429952fc18eSTheodore Ts'o */ 3430952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3431952fc18eSTheodore Ts'o int blks; 3432952fc18eSTheodore Ts'o 3433952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3434952fc18eSTheodore Ts'o overhead += blks; 3435952fc18eSTheodore Ts'o if (blks) 3436952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3437952fc18eSTheodore Ts'o cond_resched(); 3438952fc18eSTheodore Ts'o } 34393c816dedSEric Whitney 34403c816dedSEric Whitney /* 34413c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 34423c816dedSEric Whitney * loaded or not 34433c816dedSEric Whitney */ 3444b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3445810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 34463c816dedSEric Whitney else if (ext4_has_feature_journal(sb) && !sbi->s_journal) { 34473c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 34483c816dedSEric Whitney if (j_inode) { 34493c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 34503c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 34513c816dedSEric Whitney iput(j_inode); 34523c816dedSEric Whitney } else { 34533c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 34543c816dedSEric Whitney } 34553c816dedSEric Whitney } 3456952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3457952fc18eSTheodore Ts'o smp_wmb(); 3458952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3459952fc18eSTheodore Ts'o return 0; 3460952fc18eSTheodore Ts'o } 3461952fc18eSTheodore Ts'o 3462b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 346327dd4385SLukas Czerner { 346427dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 3465b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 346627dd4385SLukas Czerner 346727dd4385SLukas Czerner /* 346830fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 346930fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 347030fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 347130fac0f7SJan Kara * to keep ext2/3 backward compatibility. 347230fac0f7SJan Kara */ 3473e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 3474b5799018STheodore Ts'o return; 347530fac0f7SJan Kara /* 347627dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 347727dd4385SLukas Czerner * This should cover the situations where we can not afford to run 347827dd4385SLukas Czerner * out of space like for example punch hole, or converting 3479556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 348027dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 348127dd4385SLukas Czerner * very rare. 348227dd4385SLukas Czerner */ 3483b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 3484b5799018STheodore Ts'o sbi->s_cluster_bits); 348527dd4385SLukas Czerner 348627dd4385SLukas Czerner do_div(resv_clusters, 50); 348727dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 348827dd4385SLukas Czerner 3489b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 349027dd4385SLukas Czerner } 349127dd4385SLukas Czerner 3492617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3493ac27a0ecSDave Kleikamp { 34945e405595SDan Williams struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev); 3495d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3496ac27a0ecSDave Kleikamp struct buffer_head *bh; 3497617ba13bSMingming Cao struct ext4_super_block *es = NULL; 34985aee0f8aSTheodore Ts'o struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3499617ba13bSMingming Cao ext4_fsblk_t block; 3500617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 350170bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3502ac27a0ecSDave Kleikamp unsigned long offset = 0; 3503ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3504ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3505ac27a0ecSDave Kleikamp struct inode *root; 35060390131bSFrank Mayhar const char *descr; 3507dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3508281b5995STheodore Ts'o int blocksize, clustersize; 35094ec11028STheodore Ts'o unsigned int db_count; 35104ec11028STheodore Ts'o unsigned int i; 3511281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3512bd81d8eeSLaurent Vivier __u64 blocks_count; 351307aa2ea1SLukas Czerner int err = 0; 3514b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3515bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3516ac27a0ecSDave Kleikamp 35175aee0f8aSTheodore Ts'o if ((data && !orig_data) || !sbi) 35185aee0f8aSTheodore Ts'o goto out_free_base; 3519705895b6SPekka Enberg 3520aed9eb1bSColin Ian King sbi->s_daxdev = dax_dev; 3521705895b6SPekka Enberg sbi->s_blockgroup_lock = 3522705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 35235aee0f8aSTheodore Ts'o if (!sbi->s_blockgroup_lock) 35245aee0f8aSTheodore Ts'o goto out_free_base; 35255aee0f8aSTheodore Ts'o 3526ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 35272c0544b2STheodore Ts'o sbi->s_sb = sb; 3528240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3529d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3530f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3531f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3532f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3533ac27a0ecSDave Kleikamp 35349f6200bbSTheodore Ts'o /* Cleanup superblock name */ 3535ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 35369f6200bbSTheodore Ts'o 353707aa2ea1SLukas Czerner /* -EINVAL is default */ 3538dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3539617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3540ac27a0ecSDave Kleikamp if (!blocksize) { 3541b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3542ac27a0ecSDave Kleikamp goto out_fail; 3543ac27a0ecSDave Kleikamp } 3544ac27a0ecSDave Kleikamp 3545ac27a0ecSDave Kleikamp /* 3546617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3547ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3548ac27a0ecSDave Kleikamp */ 3549617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 355070bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 355170bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3552ac27a0ecSDave Kleikamp } else { 355370bbb3e0SAndrew Morton logical_sb_block = sb_block; 3554ac27a0ecSDave Kleikamp } 3555ac27a0ecSDave Kleikamp 3556a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3557b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3558ac27a0ecSDave Kleikamp goto out_fail; 3559ac27a0ecSDave Kleikamp } 3560ac27a0ecSDave Kleikamp /* 3561ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3562617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3563ac27a0ecSDave Kleikamp */ 35642716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3565ac27a0ecSDave Kleikamp sbi->s_es = es; 3566ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3567617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3568617ba13bSMingming Cao goto cantfind_ext4; 3569afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3570ac27a0ecSDave Kleikamp 3571feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3572e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 3573e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 3574363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3575feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3576feb0ab32SDarrick J. Wong 3577d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3578d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3579d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3580d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3581d25425f8SDarrick J. Wong silent = 1; 3582d25425f8SDarrick J. Wong goto cantfind_ext4; 3583d25425f8SDarrick J. Wong } 3584d25425f8SDarrick J. Wong 35850441984aSDarrick J. Wong /* Load the checksum driver */ 35860441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 35870441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 35880441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 35890441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 35900441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 35910441984aSDarrick J. Wong goto failed_mount; 35920441984aSDarrick J. Wong } 35930441984aSDarrick J. Wong 3594a9c47317SDarrick J. Wong /* Check superblock checksum */ 3595a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3596a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3597a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3598a9c47317SDarrick J. Wong silent = 1; 35996a797d27SDarrick J. Wong ret = -EFSBADCRC; 3600a9c47317SDarrick J. Wong goto cantfind_ext4; 3601a9c47317SDarrick J. Wong } 3602a9c47317SDarrick J. Wong 3603a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3604e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 36058c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 3606dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 3607a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3608a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3609a9c47317SDarrick J. Wong 3610ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3611ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3612fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3613617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3614fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 361587f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3616fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3617617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3618fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3619ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3620fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 362103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3622fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 36232e7842b8SHugh Dickins #endif 362498c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 362598c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 362698c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 362798c1a759SDarrick J. Wong 3628617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3629fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3630617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3631fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3632617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3633fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3634ac27a0ecSDave Kleikamp 3635617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3636fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3637bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3638fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3639bb4f397aSAneesh Kumar K.V else 3640fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 364145f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3642fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 36438b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3644fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3645ac27a0ecSDave Kleikamp 364608cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 364708cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 364830773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 364930773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 365030773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3651ac27a0ecSDave Kleikamp 36528b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3653fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3654ac27a0ecSDave Kleikamp 36551e2462f9SMingming Cao /* 3656dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3657dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3658dd919b98SAneesh Kumar K.V */ 3659bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 36608b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3661fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3662dd919b98SAneesh Kumar K.V 366351ce6511SLukas Czerner /* 366451ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 366551ce6511SLukas Czerner * no mount option specified. 366651ce6511SLukas Czerner */ 366751ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 366851ce6511SLukas Czerner 36695aee0f8aSTheodore Ts'o if (sbi->s_es->s_mount_opts[0]) { 36705aee0f8aSTheodore Ts'o char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 36715aee0f8aSTheodore Ts'o sizeof(sbi->s_es->s_mount_opts), 36725aee0f8aSTheodore Ts'o GFP_KERNEL); 36735aee0f8aSTheodore Ts'o if (!s_mount_opts) 36745aee0f8aSTheodore Ts'o goto failed_mount; 36755aee0f8aSTheodore Ts'o if (!parse_options(s_mount_opts, sb, &journal_devnum, 36765aee0f8aSTheodore Ts'o &journal_ioprio, 0)) { 36778b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 36788b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 36795aee0f8aSTheodore Ts'o s_mount_opts); 36805aee0f8aSTheodore Ts'o } 36815aee0f8aSTheodore Ts'o kfree(s_mount_opts); 36828b67f04aSTheodore Ts'o } 36835a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3684b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3685661aa520SEric Sandeen &journal_ioprio, 0)) 3686ac27a0ecSDave Kleikamp goto failed_mount; 3687ac27a0ecSDave Kleikamp 368856889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 368956889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 369056889787STheodore Ts'o "with data=journal disables delayed " 369156889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 369256889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 369356889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 369456889787STheodore Ts'o "both data=journal and delalloc"); 369556889787STheodore Ts'o goto failed_mount; 369656889787STheodore Ts'o } 369756889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 369856889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 36996ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 370056889787STheodore Ts'o goto failed_mount; 370156889787STheodore Ts'o } 3702923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 3703923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 3704923ae0ffSRoss Zwisler "both data=journal and dax"); 3705923ae0ffSRoss Zwisler goto failed_mount; 3706923ae0ffSRoss Zwisler } 370773b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 370873b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 370973b92a2aSSergey Karamov "encrypted files will use data=ordered " 371073b92a2aSSergey Karamov "instead of data journaling mode"); 371173b92a2aSSergey Karamov } 371256889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 371356889787STheodore Ts'o clear_opt(sb, DELALLOC); 3714001e4a87STejun Heo } else { 3715001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 371656889787STheodore Ts'o } 371756889787STheodore Ts'o 37181751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 37191751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 3720ac27a0ecSDave Kleikamp 3721617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3722e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 3723e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 3724e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 3725b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3726b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3727b31e1552SEric Sandeen "running e2fsck is recommended"); 3728469108ffSTheodore Tso 3729ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3730ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3731e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 3732ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3733ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3734ed3654ebSTheodore Ts'o goto failed_mount; 3735ed3654ebSTheodore Ts'o } 3736dec214d0STahsin Erdogan 3737dec214d0STahsin Erdogan /* 3738dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 3739dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 3740dec214d0STahsin Erdogan */ 3741dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 3742dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 3743dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 3744dec214d0STahsin Erdogan goto failed_mount; 3745dec214d0STahsin Erdogan } 3746ed3654ebSTheodore Ts'o } 3747ed3654ebSTheodore Ts'o 37482035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 37492035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 37502035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 37512035e776STheodore Ts'o "using the ext4 subsystem"); 37522035e776STheodore Ts'o else { 37530d9366d6SEric Sandeen /* 37540d9366d6SEric Sandeen * If we're probing be silent, if this looks like 37550d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 37560d9366d6SEric Sandeen */ 37570d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 37580d9366d6SEric Sandeen goto failed_mount; 37592035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 37602035e776STheodore Ts'o "to feature incompatibilities"); 37612035e776STheodore Ts'o goto failed_mount; 37622035e776STheodore Ts'o } 37632035e776STheodore Ts'o } 37642035e776STheodore Ts'o 37652035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 37662035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 37672035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 37682035e776STheodore Ts'o "using the ext4 subsystem"); 37692035e776STheodore Ts'o else { 37700d9366d6SEric Sandeen /* 37710d9366d6SEric Sandeen * If we're probing be silent, if this looks like 37720d9366d6SEric Sandeen * it's actually an ext4 filesystem. 37730d9366d6SEric Sandeen */ 37740d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 37750d9366d6SEric Sandeen goto failed_mount; 37762035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 37772035e776STheodore Ts'o "to feature incompatibilities"); 37782035e776STheodore Ts'o goto failed_mount; 37792035e776STheodore Ts'o } 37802035e776STheodore Ts'o } 37812035e776STheodore Ts'o 3782469108ffSTheodore Tso /* 3783ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3784ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3785ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3786ac27a0ecSDave Kleikamp */ 3787bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 3788ac27a0ecSDave Kleikamp goto failed_mount; 3789a13fb1a4SEric Sandeen 3790261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3791617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3792617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3793b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 37948cdf3372STheodore Ts'o "Unsupported filesystem blocksize %d (%d log_block_size)", 37958cdf3372STheodore Ts'o blocksize, le32_to_cpu(es->s_log_block_size)); 37968cdf3372STheodore Ts'o goto failed_mount; 37978cdf3372STheodore Ts'o } 37988cdf3372STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 37998cdf3372STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 38008cdf3372STheodore Ts'o ext4_msg(sb, KERN_ERR, 38018cdf3372STheodore Ts'o "Invalid log block size: %u", 38028cdf3372STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 3803ac27a0ecSDave Kleikamp goto failed_mount; 3804ac27a0ecSDave Kleikamp } 3805bfe0a5f4STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 3806bfe0a5f4STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 3807bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 3808bfe0a5f4STheodore Ts'o "Invalid log cluster size: %u", 3809bfe0a5f4STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 3810bfe0a5f4STheodore Ts'o goto failed_mount; 3811bfe0a5f4STheodore Ts'o } 3812ac27a0ecSDave Kleikamp 38135b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 38145b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 38155b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 38165b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 38175b9554dcSTheodore Ts'o goto failed_mount; 38185b9554dcSTheodore Ts'o } 38195b9554dcSTheodore Ts'o 3820923ae0ffSRoss Zwisler if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { 3821559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 3822559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 3823559db4c6SRoss Zwisler " that may contain inline data"); 382424f3478dSDan Williams sbi->s_mount_opt &= ~EXT4_MOUNT_DAX; 3825559db4c6SRoss Zwisler } 382680660f20SDave Jiang if (!bdev_dax_supported(sb->s_bdev, blocksize)) { 382724f3478dSDan Williams ext4_msg(sb, KERN_ERR, 382824f3478dSDan Williams "DAX unsupported by block device. Turning off DAX."); 382924f3478dSDan Williams sbi->s_mount_opt &= ~EXT4_MOUNT_DAX; 383024f3478dSDan Williams } 3831923ae0ffSRoss Zwisler } 3832923ae0ffSRoss Zwisler 3833e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 38346ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 38356ddb2447STheodore Ts'o es->s_encryption_level); 38366ddb2447STheodore Ts'o goto failed_mount; 38376ddb2447STheodore Ts'o } 38386ddb2447STheodore Ts'o 3839ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3840ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3841ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3842b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3843ce40733cSAneesh Kumar K.V blocksize); 3844ac27a0ecSDave Kleikamp goto failed_mount; 3845ac27a0ecSDave Kleikamp } 3846ac27a0ecSDave Kleikamp 3847ac27a0ecSDave Kleikamp brelse(bh); 384870bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 384970bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3850a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3851ac27a0ecSDave Kleikamp if (!bh) { 3852b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3853b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3854ac27a0ecSDave Kleikamp goto failed_mount; 3855ac27a0ecSDave Kleikamp } 38562716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3857ac27a0ecSDave Kleikamp sbi->s_es = es; 3858617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3859b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3860b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3861ac27a0ecSDave Kleikamp goto failed_mount; 3862ac27a0ecSDave Kleikamp } 3863ac27a0ecSDave Kleikamp } 3864ac27a0ecSDave Kleikamp 3865e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 3866f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3867f287a1a5STheodore Ts'o has_huge_files); 3868f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3869ac27a0ecSDave Kleikamp 3870617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3871617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3872617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3873ac27a0ecSDave Kleikamp } else { 3874ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3875ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3876c37e9e01STheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 3877c37e9e01STheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 3878c37e9e01STheodore Ts'o sbi->s_first_ino); 3879c37e9e01STheodore Ts'o goto failed_mount; 3880c37e9e01STheodore Ts'o } 3881617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 38821330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3883ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3884b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3885b31e1552SEric Sandeen "unsupported inode size: %d", 3886ac27a0ecSDave Kleikamp sbi->s_inode_size); 3887ac27a0ecSDave Kleikamp goto failed_mount; 3888ac27a0ecSDave Kleikamp } 3889ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3890ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3891ac27a0ecSDave Kleikamp } 38920b8e58a1SAndreas Dilger 38930d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 3894e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 38958fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 38960d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3897d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3898b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3899b31e1552SEric Sandeen "unsupported descriptor size %lu", 39000d1ee42fSAlexandre Ratchov sbi->s_desc_size); 39010d1ee42fSAlexandre Ratchov goto failed_mount; 39020d1ee42fSAlexandre Ratchov } 39030d1ee42fSAlexandre Ratchov } else 39040d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 39050b8e58a1SAndreas Dilger 3906ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3907ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 39080b8e58a1SAndreas Dilger 3909617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3910ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3911617ba13bSMingming Cao goto cantfind_ext4; 3912cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 3913cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 3914cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 3915cd6bb35bSTheodore Ts'o sbi->s_blocks_per_group); 3916cd6bb35bSTheodore Ts'o goto failed_mount; 3917cd6bb35bSTheodore Ts'o } 3918ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3919ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 39200d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3921ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3922ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3923e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3924e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 39250b8e58a1SAndreas Dilger 3926ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3927ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3928ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3929e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 3930f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3931f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3932f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3933f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3934f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3935bc98a42cSDavid Howells if (!sb_rdonly(sb)) 393623301410STheodore Ts'o es->s_flags |= 393723301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3938f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3939f99b2589STheodore Ts'o #else 3940bc98a42cSDavid Howells if (!sb_rdonly(sb)) 394123301410STheodore Ts'o es->s_flags |= 394223301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3943f99b2589STheodore Ts'o #endif 3944f99b2589STheodore Ts'o } 394523301410STheodore Ts'o } 3946ac27a0ecSDave Kleikamp 3947281b5995STheodore Ts'o /* Handle clustersize */ 3948281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3949e2b911c5SDarrick J. Wong has_bigalloc = ext4_has_feature_bigalloc(sb); 3950281b5995STheodore Ts'o if (has_bigalloc) { 3951281b5995STheodore Ts'o if (clustersize < blocksize) { 3952281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3953281b5995STheodore Ts'o "cluster size (%d) smaller than " 3954281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3955281b5995STheodore Ts'o goto failed_mount; 3956281b5995STheodore Ts'o } 3957281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3958281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3959281b5995STheodore Ts'o sbi->s_clusters_per_group = 3960281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3961281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3962281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3963281b5995STheodore Ts'o "#clusters per group too big: %lu", 3964281b5995STheodore Ts'o sbi->s_clusters_per_group); 3965281b5995STheodore Ts'o goto failed_mount; 3966281b5995STheodore Ts'o } 3967281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3968281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3969281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3970281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3971281b5995STheodore Ts'o sbi->s_blocks_per_group, 3972281b5995STheodore Ts'o sbi->s_clusters_per_group); 3973281b5995STheodore Ts'o goto failed_mount; 3974281b5995STheodore Ts'o } 3975281b5995STheodore Ts'o } else { 3976281b5995STheodore Ts'o if (clustersize != blocksize) { 3977bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 3978bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 3979bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 3980bfe0a5f4STheodore Ts'o goto failed_mount; 3981281b5995STheodore Ts'o } 3982ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3983b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3984b31e1552SEric Sandeen "#blocks per group too big: %lu", 3985ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3986ac27a0ecSDave Kleikamp goto failed_mount; 3987ac27a0ecSDave Kleikamp } 3988281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3989281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3990281b5995STheodore Ts'o } 3991281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3992281b5995STheodore Ts'o 3993960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3994960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3995960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3996960fd856STheodore Ts'o 3997bf43d84bSEric Sandeen /* 3998bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3999bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 4000bf43d84bSEric Sandeen */ 40015a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 400230ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 40035a9ae68aSDarrick J. Wong if (err) { 4004b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 4005bf43d84bSEric Sandeen " too large to mount safely on this system"); 4006ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 400790c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 4008ac27a0ecSDave Kleikamp goto failed_mount; 4009ac27a0ecSDave Kleikamp } 4010ac27a0ecSDave Kleikamp 4011617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 4012617ba13bSMingming Cao goto cantfind_ext4; 4013e7c95593SEric Sandeen 40140f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 40150f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 40160f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4017b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4018b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 40190f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 40200f2ddca6SFrom: Thiemo Nagel goto failed_mount; 40210f2ddca6SFrom: Thiemo Nagel } 40220f2ddca6SFrom: Thiemo Nagel 40234ec11028STheodore Ts'o /* 40244ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 40254ec11028STheodore Ts'o * of the filesystem. 40264ec11028STheodore Ts'o */ 40274ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4028b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4029b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 4030e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 40314ec11028STheodore Ts'o ext4_blocks_count(es)); 4032e7c95593SEric Sandeen goto failed_mount; 4033e7c95593SEric Sandeen } 4034bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4035bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 4036bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4037bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 4038bfe0a5f4STheodore Ts'o goto failed_mount; 4039bfe0a5f4STheodore Ts'o } 4040bfe0a5f4STheodore Ts'o 4041bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 4042bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 4043bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 4044bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 40454ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4046b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 40474ec11028STheodore Ts'o "(block count %llu, first data block %u, " 4048b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 40494ec11028STheodore Ts'o ext4_blocks_count(es), 40504ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 40514ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 40524ec11028STheodore Ts'o goto failed_mount; 40534ec11028STheodore Ts'o } 4054bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 4055fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4056fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 4057617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4058617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 40593a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 40602ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 40613a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 40623a4b77cdSEryu Guan "first meta block group too large: %u " 40633a4b77cdSEryu Guan "(group descriptor block count %u)", 40643a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 40653a4b77cdSEryu Guan goto failed_mount; 40663a4b77cdSEryu Guan } 40673a4b77cdSEryu Guan } 4068344476e1SKees Cook sbi->s_group_desc = kvmalloc_array(db_count, 4069f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 4070ac27a0ecSDave Kleikamp GFP_KERNEL); 4071ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 4072b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 40732cde417dSTheodore Ts'o ret = -ENOMEM; 4074ac27a0ecSDave Kleikamp goto failed_mount; 4075ac27a0ecSDave Kleikamp } 4076bfe0a5f4STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 4077bfe0a5f4STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 4078bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 4079bfe0a5f4STheodore Ts'o le32_to_cpu(es->s_inodes_count), 4080bfe0a5f4STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 4081bfe0a5f4STheodore Ts'o ret = -EINVAL; 4082bfe0a5f4STheodore Ts'o goto failed_mount; 4083bfe0a5f4STheodore Ts'o } 4084ac27a0ecSDave Kleikamp 4085705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 4086ac27a0ecSDave Kleikamp 408785c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 408885c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 408985c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 409085c8f176SAndrew Perepechko sb_breadahead(sb, block); 409185c8f176SAndrew Perepechko } 409285c8f176SAndrew Perepechko 4093ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 409470bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 4095a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 4096ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 4097b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4098b31e1552SEric Sandeen "can't read group descriptor %d", i); 4099ac27a0ecSDave Kleikamp db_count = i; 4100ac27a0ecSDave Kleikamp goto failed_mount2; 4101ac27a0ecSDave Kleikamp } 4102ac27a0ecSDave Kleikamp } 410344de022cSTheodore Ts'o sbi->s_gdb_count = db_count; 4104829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 4105b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 41066a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 4107f9ae9cf5STheodore Ts'o goto failed_mount2; 4108ac27a0ecSDave Kleikamp } 4109772cb7c8SJose R. Santos 4110235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 411104496411STao Ma 4112a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 4113eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 4114ce7e010aSTheodore Ts'o goto failed_mount3; 4115ce7e010aSTheodore Ts'o 4116c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 411767a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 4118c9de560dSAlex Tomas 4119f9ae9cf5STheodore Ts'o /* 4120f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 4121f9ae9cf5STheodore Ts'o */ 4122f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 4123617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 4124617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 4125ffcc4182SEric Biggers #ifdef CONFIG_EXT4_FS_ENCRYPTION 4126a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 4127ffcc4182SEric Biggers #endif 4128ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4129617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 4130e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 41311fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 4132262b4662SJan Kara else 4133262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 4134689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 4135ac27a0ecSDave Kleikamp #endif 413685787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 4137f2fa2ffcSAneesh Kumar K.V 4138ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 41393b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 4140ac27a0ecSDave Kleikamp 4141ac27a0ecSDave Kleikamp sb->s_root = NULL; 4142ac27a0ecSDave Kleikamp 4143ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 4144e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 4145ac27a0ecSDave Kleikamp 4146bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 4147c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 414850460fe8SDarrick J. Wong goto failed_mount3a; 4149c5e06d10SJohann Lombardi 4150ac27a0ecSDave Kleikamp /* 4151ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 4152ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 4153ac27a0ecSDave Kleikamp */ 4154e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 41554753d8a2STheodore Ts'o err = ext4_load_journal(sb, es, journal_devnum); 41564753d8a2STheodore Ts'o if (err) 415750460fe8SDarrick J. Wong goto failed_mount3a; 4158bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 4159e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 4160b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 4161b31e1552SEric Sandeen "suppressed and not mounted read-only"); 4162744692dcSJiaying Zhang goto failed_mount_wq; 4163ac27a0ecSDave Kleikamp } else { 41641e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 41651e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 41661e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 41671e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 41681e381f60SDmitry Monakhov goto failed_mount_wq; 41691e381f60SDmitry Monakhov } 41701e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 41711e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 41721e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 41731e381f60SDmitry Monakhov goto failed_mount_wq; 41741e381f60SDmitry Monakhov } 41751e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 41761e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 41771e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 41781e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 41791e381f60SDmitry Monakhov goto failed_mount_wq; 41801e381f60SDmitry Monakhov } 41811e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 41821e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 41831e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 41841e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 41851e381f60SDmitry Monakhov goto failed_mount_wq; 41861e381f60SDmitry Monakhov } 41871e381f60SDmitry Monakhov sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; 41881e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 4189fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 41900390131bSFrank Mayhar sbi->s_journal = NULL; 41910390131bSFrank Mayhar needs_recovery = 0; 41920390131bSFrank Mayhar goto no_journal; 4193ac27a0ecSDave Kleikamp } 4194ac27a0ecSDave Kleikamp 4195e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 4196eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4197eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 4198b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4199744692dcSJiaying Zhang goto failed_mount_wq; 4200eb40a09cSJose R. Santos } 4201eb40a09cSJose R. Santos 420225ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 420325ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 420425ed6e8aSDarrick J. Wong "feature set"); 420525ed6e8aSDarrick J. Wong goto failed_mount_wq; 4206d4da6c9cSLinus Torvalds } 4207818d276cSGirish Shilamkar 4208ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4209ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4210ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4211ac27a0ecSDave Kleikamp case 0: 4212ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 421363f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 421463f57933SAndrew Morton * cope, else JOURNAL_DATA 421563f57933SAndrew Morton */ 4216dab291afSMingming Cao if (jbd2_journal_check_available_features 421727f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4218fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 421927f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 422027f394a7STyson Nottingham } else { 4221fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 422227f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 422327f394a7STyson Nottingham } 4224ac27a0ecSDave Kleikamp break; 4225ac27a0ecSDave Kleikamp 4226617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4227617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4228dab291afSMingming Cao if (!jbd2_journal_check_available_features 4229dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4230b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4231b31e1552SEric Sandeen "requested data journaling mode"); 4232744692dcSJiaying Zhang goto failed_mount_wq; 4233ac27a0ecSDave Kleikamp } 4234ac27a0ecSDave Kleikamp default: 4235ac27a0ecSDave Kleikamp break; 4236ac27a0ecSDave Kleikamp } 4237ab04df78SJan Kara 4238ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 4239ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 4240ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 4241ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 4242ab04df78SJan Kara goto failed_mount_wq; 4243ab04df78SJan Kara } 4244ab04df78SJan Kara 4245b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4246ac27a0ecSDave Kleikamp 424718aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 424818aadd47SBobi Jam 4249ce7e010aSTheodore Ts'o no_journal: 4250cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 425147387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 425247387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 4253cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 4254cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 42559c191f70ST Makphaibulchoke goto failed_mount_wq; 42569c191f70ST Makphaibulchoke } 42579c191f70ST Makphaibulchoke 4258dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4259dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 4260dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 4261dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4262dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 4263dec214d0STahsin Erdogan goto failed_mount_wq; 4264dec214d0STahsin Erdogan } 4265dec214d0STahsin Erdogan } 4266cdb7ee4cSTahsin Erdogan } 4267dec214d0STahsin Erdogan 4268e2b911c5SDarrick J. Wong if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && 426909cbfeafSKirill A. Shutemov (blocksize != PAGE_SIZE)) { 42701cb767cdSTheodore Ts'o ext4_msg(sb, KERN_ERR, 42711cb767cdSTheodore Ts'o "Unsupported blocksize for fs encryption"); 42721cb767cdSTheodore Ts'o goto failed_mount_wq; 42731cb767cdSTheodore Ts'o } 42741cb767cdSTheodore Ts'o 4275bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 4276e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 4277e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 42786ddb2447STheodore Ts'o ext4_commit_super(sb, 1); 42796ddb2447STheodore Ts'o } 42806ddb2447STheodore Ts'o 4281fd89d5f2STejun Heo /* 4282952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4283952fc18eSTheodore Ts'o * superblock if present. 4284952fc18eSTheodore Ts'o */ 4285952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4286952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4287952fc18eSTheodore Ts'o else { 428807aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 428907aa2ea1SLukas Czerner if (err) 4290952fc18eSTheodore Ts'o goto failed_mount_wq; 4291952fc18eSTheodore Ts'o } 4292952fc18eSTheodore Ts'o 4293952fc18eSTheodore Ts'o /* 4294fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4295fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4296fd89d5f2STejun Heo */ 42972e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 42982e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 42992e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 43002e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 430107aa2ea1SLukas Czerner ret = -ENOMEM; 43022e8fa54eSJan Kara goto failed_mount4; 43032e8fa54eSJan Kara } 43042e8fa54eSJan Kara 4305ac27a0ecSDave Kleikamp /* 4306dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4307ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4308ac27a0ecSDave Kleikamp */ 4309ac27a0ecSDave Kleikamp 43101d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 43111d1fe1eeSDavid Howells if (IS_ERR(root)) { 4312b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 43131d1fe1eeSDavid Howells ret = PTR_ERR(root); 431432a9bb57SManish Katiyar root = NULL; 4315ac27a0ecSDave Kleikamp goto failed_mount4; 4316ac27a0ecSDave Kleikamp } 4317ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4318b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 431994bf608aSAl Viro iput(root); 4320ac27a0ecSDave Kleikamp goto failed_mount4; 4321ac27a0ecSDave Kleikamp } 432248fde701SAl Viro sb->s_root = d_make_root(root); 43231d1fe1eeSDavid Howells if (!sb->s_root) { 4324b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 43251d1fe1eeSDavid Howells ret = -ENOMEM; 43261d1fe1eeSDavid Howells goto failed_mount4; 43271d1fe1eeSDavid Howells } 4328ac27a0ecSDave Kleikamp 4329c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 4330c89128a0SJaegeuk Kim if (ret == -EROFS) { 43311751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 4332c89128a0SJaegeuk Kim ret = 0; 4333c89128a0SJaegeuk Kim } else if (ret) 4334c89128a0SJaegeuk Kim goto failed_mount4a; 4335ef7f3835SKalpak Shah 4336ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4337670e9875STheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE && 4338670e9875STheodore Ts'o sbi->s_want_extra_isize == 0) { 4339ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4340ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4341e2b911c5SDarrick J. Wong if (ext4_has_feature_extra_isize(sb)) { 4342ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4343ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4344ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4345ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4346ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4347ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4348ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4349ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4350ef7f3835SKalpak Shah } 4351ef7f3835SKalpak Shah } 4352ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4353ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4354ef7f3835SKalpak Shah sbi->s_inode_size) { 4355ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4356ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4357b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4358b31e1552SEric Sandeen "available"); 4359ef7f3835SKalpak Shah } 4360ef7f3835SKalpak Shah 4361b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 436227dd4385SLukas Czerner 43636fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 43646fd058f7STheodore Ts'o if (err) { 4365b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4366fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4367f9ae9cf5STheodore Ts'o goto failed_mount4a; 4368f9ae9cf5STheodore Ts'o } 4369f9ae9cf5STheodore Ts'o 4370f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4371f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4372f9ae9cf5STheodore Ts'o if (err) { 4373f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4374f9ae9cf5STheodore Ts'o err); 4375dcf2d804STao Ma goto failed_mount5; 4376c2774d84SAneesh Kumar K.V } 4377c2774d84SAneesh Kumar K.V 4378d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4379d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4380d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4381908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4382908c7f19STejun Heo GFP_KERNEL); 4383d5e03cbbSTheodore Ts'o if (!err) { 4384d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4385d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4386908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4387908c7f19STejun Heo GFP_KERNEL); 4388d5e03cbbSTheodore Ts'o } 4389d5e03cbbSTheodore Ts'o if (!err) 4390d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4391908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4392d5e03cbbSTheodore Ts'o if (!err) 4393908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4394908c7f19STejun Heo GFP_KERNEL); 4395c8585c6fSDaeho Jeong if (!err) 4396c8585c6fSDaeho Jeong err = percpu_init_rwsem(&sbi->s_journal_flag_rwsem); 4397c8585c6fSDaeho Jeong 4398d5e03cbbSTheodore Ts'o if (err) { 4399d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4400d5e03cbbSTheodore Ts'o goto failed_mount6; 4401d5e03cbbSTheodore Ts'o } 4402d5e03cbbSTheodore Ts'o 4403e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 4404d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4405d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4406d5e03cbbSTheodore Ts'o "unable to initialize " 4407d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4408d5e03cbbSTheodore Ts'o goto failed_mount6; 4409d5e03cbbSTheodore Ts'o } 4410d5e03cbbSTheodore Ts'o 4411bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4412bfff6873SLukas Czerner if (err) 4413dcf2d804STao Ma goto failed_mount6; 4414bfff6873SLukas Czerner 4415b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 4416dcf2d804STao Ma if (err) 4417dcf2d804STao Ma goto failed_mount7; 44183197ebdbSTheodore Ts'o 44199b2ff357SJan Kara #ifdef CONFIG_QUOTA 44209b2ff357SJan Kara /* Enable quota usage during mount. */ 4421bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 44229b2ff357SJan Kara err = ext4_enable_quotas(sb); 44239b2ff357SJan Kara if (err) 44249b2ff357SJan Kara goto failed_mount8; 44259b2ff357SJan Kara } 44269b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 44279b2ff357SJan Kara 4428617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4429617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4430617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 44310390131bSFrank Mayhar if (needs_recovery) { 4432b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4433617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 44340390131bSFrank Mayhar } 44350390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 44360390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 44370390131bSFrank Mayhar descr = " journalled data mode"; 44380390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 44390390131bSFrank Mayhar descr = " ordered data mode"; 44400390131bSFrank Mayhar else 44410390131bSFrank Mayhar descr = " writeback data mode"; 44420390131bSFrank Mayhar } else 44430390131bSFrank Mayhar descr = "out journal"; 44440390131bSFrank Mayhar 444579add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 444679add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 444779add3a3SLukas Czerner if (!blk_queue_discard(q)) 444879add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 444979add3a3SLukas Czerner "mounting with \"discard\" option, but " 445079add3a3SLukas Czerner "the device does not support discard"); 445179add3a3SLukas Czerner } 445279add3a3SLukas Czerner 4453e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 4454d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 44555aee0f8aSTheodore Ts'o "Opts: %.*s%s%s", descr, 44565aee0f8aSTheodore Ts'o (int) sizeof(sbi->s_es->s_mount_opts), 44575aee0f8aSTheodore Ts'o sbi->s_es->s_mount_opts, 44588b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4459ac27a0ecSDave Kleikamp 446066e61a9eSTheodore Ts'o if (es->s_error_count) 446166e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4462ac27a0ecSDave Kleikamp 4463efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4464efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4465efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4466efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4467efbed4dcSTheodore Ts'o 4468d4c402d9SCurt Wohlgemuth kfree(orig_data); 4469ac27a0ecSDave Kleikamp return 0; 4470ac27a0ecSDave Kleikamp 4471617ba13bSMingming Cao cantfind_ext4: 4472ac27a0ecSDave Kleikamp if (!silent) 4473b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4474ac27a0ecSDave Kleikamp goto failed_mount; 4475ac27a0ecSDave Kleikamp 447672ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 447772ba7450STheodore Ts'o failed_mount8: 4478ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 447972ba7450STheodore Ts'o #endif 4480dcf2d804STao Ma failed_mount7: 4481dcf2d804STao Ma ext4_unregister_li_request(sb); 4482dcf2d804STao Ma failed_mount6: 4483f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4484d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4485b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 4486d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4487d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4488d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4489d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 449000764937SAzat Khuzhin failed_mount5: 4491f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4492f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4493f9ae9cf5STheodore Ts'o failed_mount4a: 449494bf608aSAl Viro dput(sb->s_root); 449532a9bb57SManish Katiyar sb->s_root = NULL; 449694bf608aSAl Viro failed_mount4: 4497b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 44982e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 44992e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 45004c0425ffSMingming Cao failed_mount_wq: 4501dec214d0STahsin Erdogan if (sbi->s_ea_inode_cache) { 4502dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 4503dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 4504dec214d0STahsin Erdogan } 450547387409STahsin Erdogan if (sbi->s_ea_block_cache) { 450647387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 450747387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 450882939d79SJan Kara } 45090390131bSFrank Mayhar if (sbi->s_journal) { 4510dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 451147b4a50bSJan Kara sbi->s_journal = NULL; 45120390131bSFrank Mayhar } 451350460fe8SDarrick J. Wong failed_mount3a: 4514d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4515eb68d0e2SZheng Liu failed_mount3: 45169105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4517c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4518c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4519ac27a0ecSDave Kleikamp failed_mount2: 4520ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4521ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4522b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4523ac27a0ecSDave Kleikamp failed_mount: 45240441984aSDarrick J. Wong if (sbi->s_chksum_driver) 45250441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4526ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4527a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4528ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4529ac27a0ecSDave Kleikamp #endif 4530617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4531ac27a0ecSDave Kleikamp brelse(bh); 4532ac27a0ecSDave Kleikamp out_fail: 4533ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4534f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 45355aee0f8aSTheodore Ts'o out_free_base: 4536ac27a0ecSDave Kleikamp kfree(sbi); 4537d4c402d9SCurt Wohlgemuth kfree(orig_data); 45385e405595SDan Williams fs_put_dax(dax_dev); 453907aa2ea1SLukas Czerner return err ? err : ret; 4540ac27a0ecSDave Kleikamp } 4541ac27a0ecSDave Kleikamp 4542ac27a0ecSDave Kleikamp /* 4543ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4544ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4545ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4546ac27a0ecSDave Kleikamp */ 4547617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4548ac27a0ecSDave Kleikamp { 4549617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4550ac27a0ecSDave Kleikamp 4551ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 455230773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 455330773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4554ac27a0ecSDave Kleikamp 4555a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4556ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4557dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4558ac27a0ecSDave Kleikamp else 4559dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 45605bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 45615bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 45625bf5683aSHidehiro Kawai else 45635bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4564a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4565ac27a0ecSDave Kleikamp } 4566ac27a0ecSDave Kleikamp 4567c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 4568ac27a0ecSDave Kleikamp unsigned int journal_inum) 4569ac27a0ecSDave Kleikamp { 4570ac27a0ecSDave Kleikamp struct inode *journal_inode; 4571ac27a0ecSDave Kleikamp 4572c6cb7e77SEric Whitney /* 4573c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 4574c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 4575c6cb7e77SEric Whitney * will try to delete it. 4576c6cb7e77SEric Whitney */ 45771d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 45781d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4579b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4580ac27a0ecSDave Kleikamp return NULL; 4581ac27a0ecSDave Kleikamp } 4582ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4583ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4584ac27a0ecSDave Kleikamp iput(journal_inode); 4585b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4586ac27a0ecSDave Kleikamp return NULL; 4587ac27a0ecSDave Kleikamp } 4588ac27a0ecSDave Kleikamp 4589e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4590ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 45911d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4592b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4593ac27a0ecSDave Kleikamp iput(journal_inode); 4594ac27a0ecSDave Kleikamp return NULL; 4595ac27a0ecSDave Kleikamp } 4596c6cb7e77SEric Whitney return journal_inode; 4597c6cb7e77SEric Whitney } 4598c6cb7e77SEric Whitney 4599c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 4600c6cb7e77SEric Whitney unsigned int journal_inum) 4601c6cb7e77SEric Whitney { 4602c6cb7e77SEric Whitney struct inode *journal_inode; 4603c6cb7e77SEric Whitney journal_t *journal; 4604c6cb7e77SEric Whitney 4605c6cb7e77SEric Whitney BUG_ON(!ext4_has_feature_journal(sb)); 4606c6cb7e77SEric Whitney 4607c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 4608c6cb7e77SEric Whitney if (!journal_inode) 4609c6cb7e77SEric Whitney return NULL; 4610ac27a0ecSDave Kleikamp 4611dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4612ac27a0ecSDave Kleikamp if (!journal) { 4613b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4614ac27a0ecSDave Kleikamp iput(journal_inode); 4615ac27a0ecSDave Kleikamp return NULL; 4616ac27a0ecSDave Kleikamp } 4617ac27a0ecSDave Kleikamp journal->j_private = sb; 4618617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4619ac27a0ecSDave Kleikamp return journal; 4620ac27a0ecSDave Kleikamp } 4621ac27a0ecSDave Kleikamp 4622617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4623ac27a0ecSDave Kleikamp dev_t j_dev) 4624ac27a0ecSDave Kleikamp { 4625ac27a0ecSDave Kleikamp struct buffer_head *bh; 4626ac27a0ecSDave Kleikamp journal_t *journal; 4627617ba13bSMingming Cao ext4_fsblk_t start; 4628617ba13bSMingming Cao ext4_fsblk_t len; 4629ac27a0ecSDave Kleikamp int hblock, blocksize; 4630617ba13bSMingming Cao ext4_fsblk_t sb_block; 4631ac27a0ecSDave Kleikamp unsigned long offset; 4632617ba13bSMingming Cao struct ext4_super_block *es; 4633ac27a0ecSDave Kleikamp struct block_device *bdev; 4634ac27a0ecSDave Kleikamp 4635e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 46360390131bSFrank Mayhar 4637b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4638ac27a0ecSDave Kleikamp if (bdev == NULL) 4639ac27a0ecSDave Kleikamp return NULL; 4640ac27a0ecSDave Kleikamp 4641ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4642e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4643ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4644b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4645b31e1552SEric Sandeen "blocksize too small for journal device"); 4646ac27a0ecSDave Kleikamp goto out_bdev; 4647ac27a0ecSDave Kleikamp } 4648ac27a0ecSDave Kleikamp 4649617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4650617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4651ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4652ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4653b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4654b31e1552SEric Sandeen "external journal"); 4655ac27a0ecSDave Kleikamp goto out_bdev; 4656ac27a0ecSDave Kleikamp } 4657ac27a0ecSDave Kleikamp 46582716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4659617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4660ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4661617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4662b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4663b31e1552SEric Sandeen "bad superblock"); 4664ac27a0ecSDave Kleikamp brelse(bh); 4665ac27a0ecSDave Kleikamp goto out_bdev; 4666ac27a0ecSDave Kleikamp } 4667ac27a0ecSDave Kleikamp 4668df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4669df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4670df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4671df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4672df4763beSDarrick J. Wong "corrupt superblock"); 4673df4763beSDarrick J. Wong brelse(bh); 4674df4763beSDarrick J. Wong goto out_bdev; 4675df4763beSDarrick J. Wong } 4676df4763beSDarrick J. Wong 4677617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4678b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4679ac27a0ecSDave Kleikamp brelse(bh); 4680ac27a0ecSDave Kleikamp goto out_bdev; 4681ac27a0ecSDave Kleikamp } 4682ac27a0ecSDave Kleikamp 4683bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4684ac27a0ecSDave Kleikamp start = sb_block + 1; 4685ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4686ac27a0ecSDave Kleikamp 4687dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4688ac27a0ecSDave Kleikamp start, len, blocksize); 4689ac27a0ecSDave Kleikamp if (!journal) { 4690b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4691ac27a0ecSDave Kleikamp goto out_bdev; 4692ac27a0ecSDave Kleikamp } 4693ac27a0ecSDave Kleikamp journal->j_private = sb; 4694dfec8a14SMike Christie ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4695ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4696ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4697b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4698ac27a0ecSDave Kleikamp goto out_journal; 4699ac27a0ecSDave Kleikamp } 4700ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4701b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4702b31e1552SEric Sandeen "user (unsupported) - %d", 4703ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4704ac27a0ecSDave Kleikamp goto out_journal; 4705ac27a0ecSDave Kleikamp } 4706617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4707617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4708ac27a0ecSDave Kleikamp return journal; 47090b8e58a1SAndreas Dilger 4710ac27a0ecSDave Kleikamp out_journal: 4711dab291afSMingming Cao jbd2_journal_destroy(journal); 4712ac27a0ecSDave Kleikamp out_bdev: 4713617ba13bSMingming Cao ext4_blkdev_put(bdev); 4714ac27a0ecSDave Kleikamp return NULL; 4715ac27a0ecSDave Kleikamp } 4716ac27a0ecSDave Kleikamp 4717617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4718617ba13bSMingming Cao struct ext4_super_block *es, 4719ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4720ac27a0ecSDave Kleikamp { 4721ac27a0ecSDave Kleikamp journal_t *journal; 4722ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4723ac27a0ecSDave Kleikamp dev_t journal_dev; 4724ac27a0ecSDave Kleikamp int err = 0; 4725ac27a0ecSDave Kleikamp int really_read_only; 4726ac27a0ecSDave Kleikamp 4727e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 47280390131bSFrank Mayhar 4729ac27a0ecSDave Kleikamp if (journal_devnum && 4730ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4731b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4732b31e1552SEric Sandeen "numbers have changed"); 4733ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4734ac27a0ecSDave Kleikamp } else 4735ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4736ac27a0ecSDave Kleikamp 4737ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4738ac27a0ecSDave Kleikamp 4739ac27a0ecSDave Kleikamp /* 4740ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4741ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4742ac27a0ecSDave Kleikamp * can get read-write access to the device. 4743ac27a0ecSDave Kleikamp */ 4744e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 4745bc98a42cSDavid Howells if (sb_rdonly(sb)) { 4746b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4747b31e1552SEric Sandeen "required on readonly filesystem"); 4748ac27a0ecSDave Kleikamp if (really_read_only) { 4749b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4750d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 4751d98bf8cdSSimon Ruderich "(try mounting with noload)"); 4752ac27a0ecSDave Kleikamp return -EROFS; 4753ac27a0ecSDave Kleikamp } 4754b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4755b31e1552SEric Sandeen "be enabled during recovery"); 4756ac27a0ecSDave Kleikamp } 4757ac27a0ecSDave Kleikamp } 4758ac27a0ecSDave Kleikamp 4759ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4760b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4761b31e1552SEric Sandeen "and inode journals!"); 4762ac27a0ecSDave Kleikamp return -EINVAL; 4763ac27a0ecSDave Kleikamp } 4764ac27a0ecSDave Kleikamp 4765ac27a0ecSDave Kleikamp if (journal_inum) { 4766617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4767ac27a0ecSDave Kleikamp return -EINVAL; 4768ac27a0ecSDave Kleikamp } else { 4769617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4770ac27a0ecSDave Kleikamp return -EINVAL; 4771ac27a0ecSDave Kleikamp } 4772ac27a0ecSDave Kleikamp 477390576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4774b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 47754776004fSTheodore Ts'o 4776e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 4777dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 47781c13d5c0STheodore Ts'o if (!err) { 47791c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 47801c13d5c0STheodore Ts'o if (save) 47811c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 47821c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4783dab291afSMingming Cao err = jbd2_journal_load(journal); 47841c13d5c0STheodore Ts'o if (save) 47851c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 47861c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 47871c13d5c0STheodore Ts'o kfree(save); 47881c13d5c0STheodore Ts'o } 4789ac27a0ecSDave Kleikamp 4790ac27a0ecSDave Kleikamp if (err) { 4791b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4792dab291afSMingming Cao jbd2_journal_destroy(journal); 4793ac27a0ecSDave Kleikamp return err; 4794ac27a0ecSDave Kleikamp } 4795ac27a0ecSDave Kleikamp 4796617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4797617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4798ac27a0ecSDave Kleikamp 4799c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4800ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4801ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4802ac27a0ecSDave Kleikamp 4803ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4804e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4805ac27a0ecSDave Kleikamp } 4806ac27a0ecSDave Kleikamp 4807ac27a0ecSDave Kleikamp return 0; 4808ac27a0ecSDave Kleikamp } 4809ac27a0ecSDave Kleikamp 4810e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4811ac27a0ecSDave Kleikamp { 4812e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4813617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4814c4be0c1dSTakashi Sato int error = 0; 4815ac27a0ecSDave Kleikamp 4816bdfe0cbdSTheodore Ts'o if (!sbh || block_device_ejected(sb)) 4817c4be0c1dSTakashi Sato return error; 4818a17712c8SJon Derrick 4819a17712c8SJon Derrick /* 4820a17712c8SJon Derrick * The superblock bh should be mapped, but it might not be if the 4821a17712c8SJon Derrick * device was hot-removed. Not much we can do but fail the I/O. 4822a17712c8SJon Derrick */ 4823a17712c8SJon Derrick if (!buffer_mapped(sbh)) 4824a17712c8SJon Derrick return error; 4825a17712c8SJon Derrick 482671290b36STheodore Ts'o /* 482771290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 482871290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 482971290b36STheodore Ts'o * write time when we are mounting the root file system 483071290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 483171290b36STheodore Ts'o * for people who are east of GMT and who make their clock 483271290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 483371290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 483471290b36STheodore Ts'o * to complain and force a full file system check. 483571290b36STheodore Ts'o */ 48361751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 4837*6a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 4838f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4839afc32f7eSTheodore Ts'o es->s_kbytes_written = 4840afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4841afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4842afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4843f613dfcbSTheodore Ts'o else 4844f613dfcbSTheodore Ts'o es->s_kbytes_written = 4845f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4846d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 484757042651STheodore Ts'o ext4_free_blocks_count_set(es, 484857042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 484957042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4850d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 48517f93cff9STheodore Ts'o es->s_free_inodes_count = 48527f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 48535d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4854ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 485506db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 48561566a48aSTheodore Ts'o if (sync) 48574743f839SPranay Kr. Srivastava lock_buffer(sbh); 48584743f839SPranay Kr. Srivastava if (buffer_write_io_error(sbh)) { 48594743f839SPranay Kr. Srivastava /* 48604743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 48614743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 48624743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 48634743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 48644743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 48654743f839SPranay Kr. Srivastava * write and hope for the best. 48664743f839SPranay Kr. Srivastava */ 48674743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 48684743f839SPranay Kr. Srivastava "superblock detected"); 48694743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 48704743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 48714743f839SPranay Kr. Srivastava } 4872ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4873914258bfSTheodore Ts'o if (sync) { 48741566a48aSTheodore Ts'o unlock_buffer(sbh); 4875564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 487600473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 4877c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 4878b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4879b31e1552SEric Sandeen "superblock"); 4880914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4881914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4882914258bfSTheodore Ts'o } 4883914258bfSTheodore Ts'o } 4884c4be0c1dSTakashi Sato return error; 4885ac27a0ecSDave Kleikamp } 4886ac27a0ecSDave Kleikamp 4887ac27a0ecSDave Kleikamp /* 4888ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4889ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4890ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4891ac27a0ecSDave Kleikamp */ 4892617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4893617ba13bSMingming Cao struct ext4_super_block *es) 4894ac27a0ecSDave Kleikamp { 4895617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4896ac27a0ecSDave Kleikamp 4897e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 48980390131bSFrank Mayhar BUG_ON(journal != NULL); 48990390131bSFrank Mayhar return; 49000390131bSFrank Mayhar } 4901dab291afSMingming Cao jbd2_journal_lock_updates(journal); 49027ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 49037ffe1ea8SHidehiro Kawai goto out; 49047ffe1ea8SHidehiro Kawai 4905bc98a42cSDavid Howells if (ext4_has_feature_journal_needs_recovery(sb) && sb_rdonly(sb)) { 4906e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4907e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4908ac27a0ecSDave Kleikamp } 49097ffe1ea8SHidehiro Kawai 49107ffe1ea8SHidehiro Kawai out: 4911dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4912ac27a0ecSDave Kleikamp } 4913ac27a0ecSDave Kleikamp 4914ac27a0ecSDave Kleikamp /* 4915ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4916ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4917ac27a0ecSDave Kleikamp * main filesystem now. 4918ac27a0ecSDave Kleikamp */ 4919617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4920617ba13bSMingming Cao struct ext4_super_block *es) 4921ac27a0ecSDave Kleikamp { 4922ac27a0ecSDave Kleikamp journal_t *journal; 4923ac27a0ecSDave Kleikamp int j_errno; 4924ac27a0ecSDave Kleikamp const char *errstr; 4925ac27a0ecSDave Kleikamp 4926e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 49270390131bSFrank Mayhar 4928617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4929ac27a0ecSDave Kleikamp 4930ac27a0ecSDave Kleikamp /* 4931ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4932617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4933ac27a0ecSDave Kleikamp */ 4934ac27a0ecSDave Kleikamp 4935dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4936ac27a0ecSDave Kleikamp if (j_errno) { 4937ac27a0ecSDave Kleikamp char nbuf[16]; 4938ac27a0ecSDave Kleikamp 4939617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 494012062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4941ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 494212062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4943ac27a0ecSDave Kleikamp 4944617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4945617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4946e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4947ac27a0ecSDave Kleikamp 4948dab291afSMingming Cao jbd2_journal_clear_err(journal); 4949d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4950ac27a0ecSDave Kleikamp } 4951ac27a0ecSDave Kleikamp } 4952ac27a0ecSDave Kleikamp 4953ac27a0ecSDave Kleikamp /* 4954ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4955ac27a0ecSDave Kleikamp * and wait on the commit. 4956ac27a0ecSDave Kleikamp */ 4957617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4958ac27a0ecSDave Kleikamp { 4959ac27a0ecSDave Kleikamp journal_t *journal; 4960ac27a0ecSDave Kleikamp 4961bc98a42cSDavid Howells if (sb_rdonly(sb)) 4962ac27a0ecSDave Kleikamp return 0; 4963ac27a0ecSDave Kleikamp 4964617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4965b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4966ac27a0ecSDave Kleikamp } 4967ac27a0ecSDave Kleikamp 4968617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4969ac27a0ecSDave Kleikamp { 497014ce0cb4STheodore Ts'o int ret = 0; 49719eddacf9SJan Kara tid_t target; 497206a407f1SDmitry Monakhov bool needs_barrier = false; 49738d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4974ac27a0ecSDave Kleikamp 497549598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 49760db1ff22STheodore Ts'o return 0; 49770db1ff22STheodore Ts'o 49789bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 49792e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4980a1177825SJan Kara /* 4981a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4982a1177825SJan Kara * no dirty dquots 4983a1177825SJan Kara */ 4984a1177825SJan Kara dquot_writeback_dquots(sb, -1); 498506a407f1SDmitry Monakhov /* 498606a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 498706a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 498806a407f1SDmitry Monakhov * transaction_commit will do it for us. 498906a407f1SDmitry Monakhov */ 4990bda32530STheodore Ts'o if (sbi->s_journal) { 499106a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 499206a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 499306a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 499406a407f1SDmitry Monakhov needs_barrier = true; 499506a407f1SDmitry Monakhov 49968d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4997ac27a0ecSDave Kleikamp if (wait) 4998bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4999bda32530STheodore Ts'o target); 50000390131bSFrank Mayhar } 5001bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 5002bda32530STheodore Ts'o needs_barrier = true; 500306a407f1SDmitry Monakhov if (needs_barrier) { 500406a407f1SDmitry Monakhov int err; 500506a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 500606a407f1SDmitry Monakhov if (!ret) 500706a407f1SDmitry Monakhov ret = err; 500806a407f1SDmitry Monakhov } 500906a407f1SDmitry Monakhov 501006a407f1SDmitry Monakhov return ret; 501106a407f1SDmitry Monakhov } 501206a407f1SDmitry Monakhov 5013ac27a0ecSDave Kleikamp /* 5014ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 5015ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 5016be4f27d3SYongqiang Yang * 5017be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 50188e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 50198e8ad8a5SJan Kara * modifications. 5020ac27a0ecSDave Kleikamp */ 5021c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 5022ac27a0ecSDave Kleikamp { 5023c4be0c1dSTakashi Sato int error = 0; 5024c4be0c1dSTakashi Sato journal_t *journal; 5025ac27a0ecSDave Kleikamp 5026bc98a42cSDavid Howells if (sb_rdonly(sb)) 50279ca92389STheodore Ts'o return 0; 50289ca92389STheodore Ts'o 5029c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 5030ac27a0ecSDave Kleikamp 5031bb044576STheodore Ts'o if (journal) { 5032ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 5033dab291afSMingming Cao jbd2_journal_lock_updates(journal); 50347ffe1ea8SHidehiro Kawai 50357ffe1ea8SHidehiro Kawai /* 5036bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 5037bb044576STheodore Ts'o * flush the journal. 50387ffe1ea8SHidehiro Kawai */ 5039c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 50406b0310fbSEric Sandeen if (error < 0) 50416b0310fbSEric Sandeen goto out; 5042ac27a0ecSDave Kleikamp 5043ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 5044e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 5045c642dc9eSEric Sandeen } 5046c642dc9eSEric Sandeen 5047e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 50486b0310fbSEric Sandeen out: 5049bb044576STheodore Ts'o if (journal) 50508e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 5051bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 50526b0310fbSEric Sandeen return error; 5053ac27a0ecSDave Kleikamp } 5054ac27a0ecSDave Kleikamp 5055ac27a0ecSDave Kleikamp /* 5056ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 5057ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 5058ac27a0ecSDave Kleikamp */ 5059c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 5060ac27a0ecSDave Kleikamp { 5061bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 50629ca92389STheodore Ts'o return 0; 50639ca92389STheodore Ts'o 5064c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 50659ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 5066e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 5067c642dc9eSEric Sandeen } 5068c642dc9eSEric Sandeen 5069e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 5070c4be0c1dSTakashi Sato return 0; 5071ac27a0ecSDave Kleikamp } 5072ac27a0ecSDave Kleikamp 5073673c6100STheodore Ts'o /* 5074673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 5075673c6100STheodore Ts'o */ 5076673c6100STheodore Ts'o struct ext4_mount_options { 5077673c6100STheodore Ts'o unsigned long s_mount_opt; 5078a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 507908cefc7aSEric W. Biederman kuid_t s_resuid; 508008cefc7aSEric W. Biederman kgid_t s_resgid; 5081673c6100STheodore Ts'o unsigned long s_commit_interval; 5082673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 5083673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 5084673c6100STheodore Ts'o int s_jquota_fmt; 5085a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 5086673c6100STheodore Ts'o #endif 5087673c6100STheodore Ts'o }; 5088673c6100STheodore Ts'o 5089617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 5090ac27a0ecSDave Kleikamp { 5091617ba13bSMingming Cao struct ext4_super_block *es; 5092617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5093ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 5094617ba13bSMingming Cao struct ext4_mount_options old_opts; 5095c79d967dSChristoph Hellwig int enable_quota = 0; 50968a266467STheodore Ts'o ext4_group_t g; 5097b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 5098c5e06d10SJohann Lombardi int err = 0; 5099ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 510003dafb5fSChen Gang int i, j; 5101ac27a0ecSDave Kleikamp #endif 5102d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 5103ac27a0ecSDave Kleikamp 5104ac27a0ecSDave Kleikamp /* Store the original options */ 5105ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 5106ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 5107a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 5108ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 5109ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 5110ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 511130773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 511230773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 5113ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5114ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 5115a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 511603dafb5fSChen Gang if (sbi->s_qf_names[i]) { 511703dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 511803dafb5fSChen Gang GFP_KERNEL); 511903dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 512003dafb5fSChen Gang for (j = 0; j < i; j++) 512103dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 51223e36a163SWei Yongjun kfree(orig_data); 512303dafb5fSChen Gang return -ENOMEM; 512403dafb5fSChen Gang } 512503dafb5fSChen Gang } else 512603dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 5127ac27a0ecSDave Kleikamp #endif 5128b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 5129b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 5130ac27a0ecSDave Kleikamp 5131661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 5132ac27a0ecSDave Kleikamp err = -EINVAL; 5133ac27a0ecSDave Kleikamp goto restore_opts; 5134ac27a0ecSDave Kleikamp } 5135ac27a0ecSDave Kleikamp 51366b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 51376b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 51386b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 51392d5b86e0SEric Sandeen "during remount not supported; ignoring"); 51402d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 5141c6d3d56dSDarrick J. Wong } 5142c6d3d56dSDarrick J. Wong 51436ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 51446ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 51456ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 51466ae6514bSPiotr Sarna "both data=journal and delalloc"); 51476ae6514bSPiotr Sarna err = -EINVAL; 51486ae6514bSPiotr Sarna goto restore_opts; 51496ae6514bSPiotr Sarna } 51506ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 51516ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 51526ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 51536ae6514bSPiotr Sarna err = -EINVAL; 51546ae6514bSPiotr Sarna goto restore_opts; 51556ae6514bSPiotr Sarna } 5156923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 5157923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 5158923ae0ffSRoss Zwisler "both data=journal and dax"); 5159923ae0ffSRoss Zwisler err = -EINVAL; 5160923ae0ffSRoss Zwisler goto restore_opts; 5161923ae0ffSRoss Zwisler } 5162ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 5163ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5164ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5165ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5166ab04df78SJan Kara err = -EINVAL; 5167ab04df78SJan Kara goto restore_opts; 5168ab04df78SJan Kara } 5169923ae0ffSRoss Zwisler } 5170923ae0ffSRoss Zwisler 5171cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 5172cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 5173cdb7ee4cSTahsin Erdogan err = -EINVAL; 5174cdb7ee4cSTahsin Erdogan goto restore_opts; 5175cdb7ee4cSTahsin Erdogan } 5176cdb7ee4cSTahsin Erdogan 5177923ae0ffSRoss Zwisler if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { 5178923ae0ffSRoss Zwisler ext4_msg(sb, KERN_WARNING, "warning: refusing change of " 5179923ae0ffSRoss Zwisler "dax flag with busy inodes while remounting"); 5180923ae0ffSRoss Zwisler sbi->s_mount_opt ^= EXT4_MOUNT_DAX; 51816ae6514bSPiotr Sarna } 51826ae6514bSPiotr Sarna 51834ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 5184c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 5185ac27a0ecSDave Kleikamp 51861751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 51871751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 5188ac27a0ecSDave Kleikamp 5189ac27a0ecSDave Kleikamp es = sbi->s_es; 5190ac27a0ecSDave Kleikamp 5191b3881f74STheodore Ts'o if (sbi->s_journal) { 5192617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 5193b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 5194b3881f74STheodore Ts'o } 5195ac27a0ecSDave Kleikamp 51961751e8a6SLinus Torvalds if (*flags & SB_LAZYTIME) 51971751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 5198a2fd66d0STheodore Ts'o 51991751e8a6SLinus Torvalds if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 52004ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 5201ac27a0ecSDave Kleikamp err = -EROFS; 5202ac27a0ecSDave Kleikamp goto restore_opts; 5203ac27a0ecSDave Kleikamp } 5204ac27a0ecSDave Kleikamp 52051751e8a6SLinus Torvalds if (*flags & SB_RDONLY) { 520638c03b34STheodore Ts'o err = sync_filesystem(sb); 520738c03b34STheodore Ts'o if (err < 0) 520838c03b34STheodore Ts'o goto restore_opts; 52090f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 52100f0dd62fSChristoph Hellwig if (err < 0) 5211c79d967dSChristoph Hellwig goto restore_opts; 5212c79d967dSChristoph Hellwig 5213ac27a0ecSDave Kleikamp /* 5214ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 5215ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 5216ac27a0ecSDave Kleikamp */ 52171751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5218ac27a0ecSDave Kleikamp 5219ac27a0ecSDave Kleikamp /* 5220ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 5221ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 5222ac27a0ecSDave Kleikamp * mark the partition as valid again. 5223ac27a0ecSDave Kleikamp */ 5224617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 5225617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 5226ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 5227ac27a0ecSDave Kleikamp 5228a63c9eb2STheodore Ts'o if (sbi->s_journal) 5229617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 52302dca60d9STheodore Ts'o if (sbi->s_mmp_tsk) 52312dca60d9STheodore Ts'o kthread_stop(sbi->s_mmp_tsk); 5232ac27a0ecSDave Kleikamp } else { 5233a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 5234e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 52352cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 5236ac27a0ecSDave Kleikamp err = -EROFS; 5237ac27a0ecSDave Kleikamp goto restore_opts; 5238ac27a0ecSDave Kleikamp } 5239ead6596bSEric Sandeen /* 52408a266467STheodore Ts'o * Make sure the group descriptor checksums 52410b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 52428a266467STheodore Ts'o */ 52438a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 52448a266467STheodore Ts'o struct ext4_group_desc *gdp = 52458a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 52468a266467STheodore Ts'o 5247feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 5248b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5249b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 5250e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 52518a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 52526a797d27SDarrick J. Wong err = -EFSBADCRC; 52538a266467STheodore Ts'o goto restore_opts; 52548a266467STheodore Ts'o } 52558a266467STheodore Ts'o } 52568a266467STheodore Ts'o 52578a266467STheodore Ts'o /* 5258ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 5259ead6596bSEric Sandeen * around from a previously readonly bdev mount, 5260ead6596bSEric Sandeen * require a full umount/remount for now. 5261ead6596bSEric Sandeen */ 5262ead6596bSEric Sandeen if (es->s_last_orphan) { 5263b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 5264ead6596bSEric Sandeen "remount RDWR because of unprocessed " 5265ead6596bSEric Sandeen "orphan inode list. Please " 5266b31e1552SEric Sandeen "umount/remount instead"); 5267ead6596bSEric Sandeen err = -EINVAL; 5268ead6596bSEric Sandeen goto restore_opts; 5269ead6596bSEric Sandeen } 5270ead6596bSEric Sandeen 5271ac27a0ecSDave Kleikamp /* 5272ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 5273ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 5274ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 5275ac27a0ecSDave Kleikamp * the partition.) 5276ac27a0ecSDave Kleikamp */ 52770390131bSFrank Mayhar if (sbi->s_journal) 5278617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 5279ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 5280c89128a0SJaegeuk Kim 5281c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 5282c89128a0SJaegeuk Kim if (err) 5283c89128a0SJaegeuk Kim goto restore_opts; 5284c89128a0SJaegeuk Kim 52851751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 5286e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 5287c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 5288c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 5289c5e06d10SJohann Lombardi err = -EROFS; 5290c5e06d10SJohann Lombardi goto restore_opts; 5291c5e06d10SJohann Lombardi } 5292c79d967dSChristoph Hellwig enable_quota = 1; 5293ac27a0ecSDave Kleikamp } 5294ac27a0ecSDave Kleikamp } 5295bfff6873SLukas Czerner 5296bfff6873SLukas Czerner /* 5297bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 5298bfff6873SLukas Czerner * current settings 5299bfff6873SLukas Czerner */ 5300bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 5301bfff6873SLukas Czerner ext4_unregister_li_request(sb); 5302bfff6873SLukas Czerner else { 5303bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 5304bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 5305bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 5306bfff6873SLukas Czerner } 5307bfff6873SLukas Czerner 53086fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 5309c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 5310c89128a0SJaegeuk Kim err = ext4_commit_super(sb, 1); 5311c89128a0SJaegeuk Kim if (err) 5312c89128a0SJaegeuk Kim goto restore_opts; 5313c89128a0SJaegeuk Kim } 53140390131bSFrank Mayhar 5315ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5316ac27a0ecSDave Kleikamp /* Release old quota file names */ 5317a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 5318ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 53197c319d32SAditya Kali if (enable_quota) { 53207c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 53210f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 5322e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 53237c319d32SAditya Kali err = ext4_enable_quotas(sb); 532407724f98STheodore Ts'o if (err) 53257c319d32SAditya Kali goto restore_opts; 53267c319d32SAditya Kali } 53277c319d32SAditya Kali } 53287c319d32SAditya Kali #endif 5329d4c402d9SCurt Wohlgemuth 53301751e8a6SLinus Torvalds *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME); 5331d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5332d4c402d9SCurt Wohlgemuth kfree(orig_data); 5333ac27a0ecSDave Kleikamp return 0; 53340b8e58a1SAndreas Dilger 5335ac27a0ecSDave Kleikamp restore_opts: 5336ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5337ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5338a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5339ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5340ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5341ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 534230773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 534330773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5344ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5345ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5346a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5347ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5348ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5349ac27a0ecSDave Kleikamp } 5350ac27a0ecSDave Kleikamp #endif 5351d4c402d9SCurt Wohlgemuth kfree(orig_data); 5352ac27a0ecSDave Kleikamp return err; 5353ac27a0ecSDave Kleikamp } 5354ac27a0ecSDave Kleikamp 5355689c958cSLi Xi #ifdef CONFIG_QUOTA 5356689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 5357689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 5358689c958cSLi Xi { 5359689c958cSLi Xi struct kqid qid; 5360689c958cSLi Xi struct dquot *dquot; 5361689c958cSLi Xi u64 limit; 5362689c958cSLi Xi u64 curblock; 5363689c958cSLi Xi 5364689c958cSLi Xi qid = make_kqid_projid(projid); 5365689c958cSLi Xi dquot = dqget(sb, qid); 5366689c958cSLi Xi if (IS_ERR(dquot)) 5367689c958cSLi Xi return PTR_ERR(dquot); 53687b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 5369689c958cSLi Xi 5370689c958cSLi Xi limit = (dquot->dq_dqb.dqb_bsoftlimit ? 5371689c958cSLi Xi dquot->dq_dqb.dqb_bsoftlimit : 5372689c958cSLi Xi dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; 5373689c958cSLi Xi if (limit && buf->f_blocks > limit) { 5374f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 5375f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 5376689c958cSLi Xi buf->f_blocks = limit; 5377689c958cSLi Xi buf->f_bfree = buf->f_bavail = 5378689c958cSLi Xi (buf->f_blocks > curblock) ? 5379689c958cSLi Xi (buf->f_blocks - curblock) : 0; 5380689c958cSLi Xi } 5381689c958cSLi Xi 5382689c958cSLi Xi limit = dquot->dq_dqb.dqb_isoftlimit ? 5383689c958cSLi Xi dquot->dq_dqb.dqb_isoftlimit : 5384689c958cSLi Xi dquot->dq_dqb.dqb_ihardlimit; 5385689c958cSLi Xi if (limit && buf->f_files > limit) { 5386689c958cSLi Xi buf->f_files = limit; 5387689c958cSLi Xi buf->f_ffree = 5388689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 5389689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 5390689c958cSLi Xi } 5391689c958cSLi Xi 53927b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 5393689c958cSLi Xi dqput(dquot); 5394689c958cSLi Xi return 0; 5395689c958cSLi Xi } 5396689c958cSLi Xi #endif 5397689c958cSLi Xi 5398617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5399ac27a0ecSDave Kleikamp { 5400ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5401617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5402617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 540327dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5404960cc398SPekka Enberg u64 fsid; 5405d02a9391SKazuya Mio s64 bfree; 540627dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5407ac27a0ecSDave Kleikamp 5408952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5409952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5410ac27a0ecSDave Kleikamp 5411617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5412ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5413b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 541457042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 541557042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5416d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 541757042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 541827dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 541927dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 542027dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5421ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5422ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 542352d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5424617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5425960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5426960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5427960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5428960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 54290b8e58a1SAndreas Dilger 5430689c958cSLi Xi #ifdef CONFIG_QUOTA 5431689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 5432689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 5433689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 5434689c958cSLi Xi #endif 5435ac27a0ecSDave Kleikamp return 0; 5436ac27a0ecSDave Kleikamp } 5437ac27a0ecSDave Kleikamp 5438ac27a0ecSDave Kleikamp 5439ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5440ac27a0ecSDave Kleikamp 5441bc8230eeSJan Kara /* 5442bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 5443bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 5444bc8230eeSJan Kara */ 5445ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5446ac27a0ecSDave Kleikamp { 54474c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5448ac27a0ecSDave Kleikamp } 5449ac27a0ecSDave Kleikamp 5450617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5451ac27a0ecSDave Kleikamp { 5452ac27a0ecSDave Kleikamp int ret, err; 5453ac27a0ecSDave Kleikamp handle_t *handle; 5454ac27a0ecSDave Kleikamp struct inode *inode; 5455ac27a0ecSDave Kleikamp 5456ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 54579924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5458617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5459ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5460ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5461ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5462617ba13bSMingming Cao err = ext4_journal_stop(handle); 5463ac27a0ecSDave Kleikamp if (!ret) 5464ac27a0ecSDave Kleikamp ret = err; 5465ac27a0ecSDave Kleikamp return ret; 5466ac27a0ecSDave Kleikamp } 5467ac27a0ecSDave Kleikamp 5468617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5469ac27a0ecSDave Kleikamp { 5470ac27a0ecSDave Kleikamp int ret, err; 5471ac27a0ecSDave Kleikamp handle_t *handle; 5472ac27a0ecSDave Kleikamp 54739924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5474617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5475ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5476ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5477ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5478617ba13bSMingming Cao err = ext4_journal_stop(handle); 5479ac27a0ecSDave Kleikamp if (!ret) 5480ac27a0ecSDave Kleikamp ret = err; 5481ac27a0ecSDave Kleikamp return ret; 5482ac27a0ecSDave Kleikamp } 5483ac27a0ecSDave Kleikamp 5484617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5485ac27a0ecSDave Kleikamp { 5486ac27a0ecSDave Kleikamp int ret, err; 5487ac27a0ecSDave Kleikamp handle_t *handle; 5488ac27a0ecSDave Kleikamp 54899924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5490617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 54919c3013e9SJan Kara if (IS_ERR(handle)) { 54929c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 54939c3013e9SJan Kara dquot_release(dquot); 5494ac27a0ecSDave Kleikamp return PTR_ERR(handle); 54959c3013e9SJan Kara } 5496ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5497617ba13bSMingming Cao err = ext4_journal_stop(handle); 5498ac27a0ecSDave Kleikamp if (!ret) 5499ac27a0ecSDave Kleikamp ret = err; 5500ac27a0ecSDave Kleikamp return ret; 5501ac27a0ecSDave Kleikamp } 5502ac27a0ecSDave Kleikamp 5503617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5504ac27a0ecSDave Kleikamp { 5505262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5506262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5507262b4662SJan Kara 55082c8be6b2SJan Kara /* Are we journaling quotas? */ 5509e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) || 5510262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5511ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5512617ba13bSMingming Cao return ext4_write_dquot(dquot); 5513ac27a0ecSDave Kleikamp } else { 5514ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5515ac27a0ecSDave Kleikamp } 5516ac27a0ecSDave Kleikamp } 5517ac27a0ecSDave Kleikamp 5518617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5519ac27a0ecSDave Kleikamp { 5520ac27a0ecSDave Kleikamp int ret, err; 5521ac27a0ecSDave Kleikamp handle_t *handle; 5522ac27a0ecSDave Kleikamp 5523ac27a0ecSDave Kleikamp /* Data block + inode block */ 55242b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 5525ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5526ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5527ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5528617ba13bSMingming Cao err = ext4_journal_stop(handle); 5529ac27a0ecSDave Kleikamp if (!ret) 5530ac27a0ecSDave Kleikamp ret = err; 5531ac27a0ecSDave Kleikamp return ret; 5532ac27a0ecSDave Kleikamp } 5533ac27a0ecSDave Kleikamp 5534ac27a0ecSDave Kleikamp /* 5535ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5536ac27a0ecSDave Kleikamp * the quota file and such... 5537ac27a0ecSDave Kleikamp */ 5538617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5539ac27a0ecSDave Kleikamp { 5540287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5541617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5542ac27a0ecSDave Kleikamp } 5543ac27a0ecSDave Kleikamp 5544daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 5545daf647d2STheodore Ts'o { 5546daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 5547daf647d2STheodore Ts'o 5548daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 5549daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 5550daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 5551daf647d2STheodore Ts'o * because the name of the lock is set using the 5552daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 5553daf647d2STheodore Ts'o */ 5554daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 5555daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 5556daf647d2STheodore Ts'o } 5557daf647d2STheodore Ts'o 5558ac27a0ecSDave Kleikamp /* 5559ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5560ac27a0ecSDave Kleikamp */ 5561617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 55628c54ca9cSAl Viro const struct path *path) 5563ac27a0ecSDave Kleikamp { 5564ac27a0ecSDave Kleikamp int err; 5565ac27a0ecSDave Kleikamp 5566ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5567ac27a0ecSDave Kleikamp return -EINVAL; 55680623543bSJan Kara 5569ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5570d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5571ac27a0ecSDave Kleikamp return -EXDEV; 55720623543bSJan Kara /* Journaling quota? */ 55730623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 55742b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5575f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5576b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5577b31e1552SEric Sandeen "Quota file not on filesystem root. " 5578b31e1552SEric Sandeen "Journaled quota will not work"); 557991389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 558091389240SJan Kara } else { 558191389240SJan Kara /* 558291389240SJan Kara * Clear the flag just in case mount options changed since 558391389240SJan Kara * last time. 558491389240SJan Kara */ 558591389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 55860623543bSJan Kara } 55870623543bSJan Kara 55880623543bSJan Kara /* 55890623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 55900623543bSJan Kara * all updates to the file when we bypass pagecache... 55910623543bSJan Kara */ 55920390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 55932b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 55940623543bSJan Kara /* 55950623543bSJan Kara * We don't need to lock updates but journal_flush() could 55960623543bSJan Kara * otherwise be livelocked... 55970623543bSJan Kara */ 55980623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 55997ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 56000623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5601f00c9e44SJan Kara if (err) 56027ffe1ea8SHidehiro Kawai return err; 56037ffe1ea8SHidehiro Kawai } 5604957153fcSJan Kara 5605daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 5606daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 5607957153fcSJan Kara if (err) { 5608daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 5609daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 5610957153fcSJan Kara } else { 5611957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 5612957153fcSJan Kara handle_t *handle; 5613957153fcSJan Kara 561461a92987SJan Kara /* 561561a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 561661a92987SJan Kara * files. If this fails, we return success anyway since quotas 561761a92987SJan Kara * are already enabled and this is not a hard failure. 561861a92987SJan Kara */ 5619957153fcSJan Kara inode_lock(inode); 5620957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 5621957153fcSJan Kara if (IS_ERR(handle)) 5622957153fcSJan Kara goto unlock_inode; 5623957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 5624957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 5625957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 5626957153fcSJan Kara ext4_mark_inode_dirty(handle, inode); 5627957153fcSJan Kara ext4_journal_stop(handle); 5628957153fcSJan Kara unlock_inode: 5629957153fcSJan Kara inode_unlock(inode); 5630957153fcSJan Kara } 5631daf647d2STheodore Ts'o return err; 5632ac27a0ecSDave Kleikamp } 5633ac27a0ecSDave Kleikamp 56347c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 56357c319d32SAditya Kali unsigned int flags) 56367c319d32SAditya Kali { 56377c319d32SAditya Kali int err; 56387c319d32SAditya Kali struct inode *qf_inode; 5639a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 56407c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5641689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5642689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 56437c319d32SAditya Kali }; 56447c319d32SAditya Kali 5645e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 56467c319d32SAditya Kali 56477c319d32SAditya Kali if (!qf_inums[type]) 56487c319d32SAditya Kali return -EPERM; 56497c319d32SAditya Kali 56507c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 56517c319d32SAditya Kali if (IS_ERR(qf_inode)) { 56527c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 56537c319d32SAditya Kali return PTR_ERR(qf_inode); 56547c319d32SAditya Kali } 56557c319d32SAditya Kali 5656bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5657bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 5658daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 56597c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 56607c319d32SAditya Kali iput(qf_inode); 5661daf647d2STheodore Ts'o if (err) 5662daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 56637c319d32SAditya Kali 56647c319d32SAditya Kali return err; 56657c319d32SAditya Kali } 56667c319d32SAditya Kali 56677c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 56687c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 56697c319d32SAditya Kali { 56707c319d32SAditya Kali int type, err = 0; 5671a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 56727c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5673689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5674689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 56757c319d32SAditya Kali }; 567649da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 567749da9392SJan Kara test_opt(sb, USRQUOTA), 567849da9392SJan Kara test_opt(sb, GRPQUOTA), 567949da9392SJan Kara test_opt(sb, PRJQUOTA), 568049da9392SJan Kara }; 56817c319d32SAditya Kali 568291389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 5683a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 56847c319d32SAditya Kali if (qf_inums[type]) { 56857c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 568649da9392SJan Kara DQUOT_USAGE_ENABLED | 568749da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 56887c319d32SAditya Kali if (err) { 568995f1fda4Szhangyi (F) for (type--; type >= 0; type--) 569095f1fda4Szhangyi (F) dquot_quota_off(sb, type); 569195f1fda4Szhangyi (F) 56927c319d32SAditya Kali ext4_warning(sb, 569372ba7450STheodore Ts'o "Failed to enable quota tracking " 569472ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 569572ba7450STheodore Ts'o "e2fsck to fix.", type, err); 56967c319d32SAditya Kali return err; 56977c319d32SAditya Kali } 56987c319d32SAditya Kali } 56997c319d32SAditya Kali } 57007c319d32SAditya Kali return 0; 57017c319d32SAditya Kali } 57027c319d32SAditya Kali 5703ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5704ca0e05e4SDmitry Monakhov { 570521f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 570621f97697SJan Kara handle_t *handle; 5707957153fcSJan Kara int err; 570821f97697SJan Kara 570987009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 571087009d86SDmitry Monakhov * Caller already holds s_umount sem */ 571187009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5712ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5713ca0e05e4SDmitry Monakhov 5714957153fcSJan Kara if (!inode || !igrab(inode)) 57150b268590SAmir Goldstein goto out; 57160b268590SAmir Goldstein 5717957153fcSJan Kara err = dquot_quota_off(sb, type); 5718964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 5719957153fcSJan Kara goto out_put; 5720957153fcSJan Kara 5721957153fcSJan Kara inode_lock(inode); 572261a92987SJan Kara /* 572361a92987SJan Kara * Update modification times of quota files when userspace can 572461a92987SJan Kara * start looking at them. If we fail, we return success anyway since 572561a92987SJan Kara * this is not a hard failure and quotas are already disabled. 572661a92987SJan Kara */ 57279924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 572821f97697SJan Kara if (IS_ERR(handle)) 5729957153fcSJan Kara goto out_unlock; 5730957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 5731957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 5732eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 573321f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 573421f97697SJan Kara ext4_journal_stop(handle); 5735957153fcSJan Kara out_unlock: 5736957153fcSJan Kara inode_unlock(inode); 5737957153fcSJan Kara out_put: 5738964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 5739957153fcSJan Kara iput(inode); 5740957153fcSJan Kara return err; 574121f97697SJan Kara out: 5742ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5743ca0e05e4SDmitry Monakhov } 5744ca0e05e4SDmitry Monakhov 5745ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5746ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5747ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5748ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5749617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5750ac27a0ecSDave Kleikamp size_t len, loff_t off) 5751ac27a0ecSDave Kleikamp { 5752ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5753725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5754ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5755ac27a0ecSDave Kleikamp int tocopy; 5756ac27a0ecSDave Kleikamp size_t toread; 5757ac27a0ecSDave Kleikamp struct buffer_head *bh; 5758ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5759ac27a0ecSDave Kleikamp 5760ac27a0ecSDave Kleikamp if (off > i_size) 5761ac27a0ecSDave Kleikamp return 0; 5762ac27a0ecSDave Kleikamp if (off+len > i_size) 5763ac27a0ecSDave Kleikamp len = i_size-off; 5764ac27a0ecSDave Kleikamp toread = len; 5765ac27a0ecSDave Kleikamp while (toread > 0) { 5766ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5767ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 57681c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 57691c215028STheodore Ts'o if (IS_ERR(bh)) 57701c215028STheodore Ts'o return PTR_ERR(bh); 5771ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5772ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5773ac27a0ecSDave Kleikamp else 5774ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5775ac27a0ecSDave Kleikamp brelse(bh); 5776ac27a0ecSDave Kleikamp offset = 0; 5777ac27a0ecSDave Kleikamp toread -= tocopy; 5778ac27a0ecSDave Kleikamp data += tocopy; 5779ac27a0ecSDave Kleikamp blk++; 5780ac27a0ecSDave Kleikamp } 5781ac27a0ecSDave Kleikamp return len; 5782ac27a0ecSDave Kleikamp } 5783ac27a0ecSDave Kleikamp 5784ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5785ac27a0ecSDave Kleikamp * enough credits) */ 5786617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5787ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5788ac27a0ecSDave Kleikamp { 5789ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5790725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 57911c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5792c5e298aeSTheodore Ts'o int retries = 0; 5793ac27a0ecSDave Kleikamp struct buffer_head *bh; 5794ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5795ac27a0ecSDave Kleikamp 57960390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5797b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5798b31e1552SEric Sandeen " cancelled because transaction is not started", 57999c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 58009c3013e9SJan Kara return -EIO; 58019c3013e9SJan Kara } 580267eeb568SDmitry Monakhov /* 580367eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 580467eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 580567eeb568SDmitry Monakhov */ 580667eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 580767eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 580867eeb568SDmitry Monakhov " cancelled because not block aligned", 580967eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 581067eeb568SDmitry Monakhov return -EIO; 581167eeb568SDmitry Monakhov } 581267eeb568SDmitry Monakhov 5813c5e298aeSTheodore Ts'o do { 5814c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 5815c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 5816c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 5817c5e298aeSTheodore Ts'o } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && 5818c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 58191c215028STheodore Ts'o if (IS_ERR(bh)) 58201c215028STheodore Ts'o return PTR_ERR(bh); 5821ac27a0ecSDave Kleikamp if (!bh) 5822ac27a0ecSDave Kleikamp goto out; 58235d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5824617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5825ac27a0ecSDave Kleikamp if (err) { 5826ac27a0ecSDave Kleikamp brelse(bh); 58271c215028STheodore Ts'o return err; 5828ac27a0ecSDave Kleikamp } 5829ac27a0ecSDave Kleikamp lock_buffer(bh); 583067eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5831ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5832ac27a0ecSDave Kleikamp unlock_buffer(bh); 58330390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5834ac27a0ecSDave Kleikamp brelse(bh); 5835ac27a0ecSDave Kleikamp out: 583667eeb568SDmitry Monakhov if (inode->i_size < off + len) { 583767eeb568SDmitry Monakhov i_size_write(inode, off + len); 5838617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5839617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 584021f97697SJan Kara } 584167eeb568SDmitry Monakhov return len; 5842ac27a0ecSDave Kleikamp } 5843ac27a0ecSDave Kleikamp 58448f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid) 58458f0e8746STheodore Ts'o { 58468f0e8746STheodore Ts'o const struct quota_format_ops *ops; 58478f0e8746STheodore Ts'o 58488f0e8746STheodore Ts'o if (!sb_has_quota_loaded(sb, qid->type)) 58498f0e8746STheodore Ts'o return -ESRCH; 58508f0e8746STheodore Ts'o ops = sb_dqopt(sb)->ops[qid->type]; 58518f0e8746STheodore Ts'o if (!ops || !ops->get_next_id) 58528f0e8746STheodore Ts'o return -ENOSYS; 58538f0e8746STheodore Ts'o return dquot_get_next_id(sb, qid); 58548f0e8746STheodore Ts'o } 5855ac27a0ecSDave Kleikamp #endif 5856ac27a0ecSDave Kleikamp 5857152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5858152a0836SAl Viro const char *dev_name, void *data) 5859ac27a0ecSDave Kleikamp { 5860152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5861ac27a0ecSDave Kleikamp } 5862ac27a0ecSDave Kleikamp 5863c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 586424b58424STheodore Ts'o static inline void register_as_ext2(void) 586524b58424STheodore Ts'o { 586624b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 586724b58424STheodore Ts'o if (err) 586824b58424STheodore Ts'o printk(KERN_WARNING 586924b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 587024b58424STheodore Ts'o } 587124b58424STheodore Ts'o 587224b58424STheodore Ts'o static inline void unregister_as_ext2(void) 587324b58424STheodore Ts'o { 587424b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 587524b58424STheodore Ts'o } 58762035e776STheodore Ts'o 58772035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 58782035e776STheodore Ts'o { 5879e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 58802035e776STheodore Ts'o return 0; 5881bc98a42cSDavid Howells if (sb_rdonly(sb)) 58822035e776STheodore Ts'o return 1; 5883e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 58842035e776STheodore Ts'o return 0; 58852035e776STheodore Ts'o return 1; 58862035e776STheodore Ts'o } 588724b58424STheodore Ts'o #else 588824b58424STheodore Ts'o static inline void register_as_ext2(void) { } 588924b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 58902035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 589124b58424STheodore Ts'o #endif 589224b58424STheodore Ts'o 589324b58424STheodore Ts'o static inline void register_as_ext3(void) 589424b58424STheodore Ts'o { 589524b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 589624b58424STheodore Ts'o if (err) 589724b58424STheodore Ts'o printk(KERN_WARNING 589824b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 589924b58424STheodore Ts'o } 590024b58424STheodore Ts'o 590124b58424STheodore Ts'o static inline void unregister_as_ext3(void) 590224b58424STheodore Ts'o { 590324b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 590424b58424STheodore Ts'o } 59052035e776STheodore Ts'o 59062035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 59072035e776STheodore Ts'o { 5908e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 59092035e776STheodore Ts'o return 0; 5910e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 59112035e776STheodore Ts'o return 0; 5912bc98a42cSDavid Howells if (sb_rdonly(sb)) 59132035e776STheodore Ts'o return 1; 5914e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 59152035e776STheodore Ts'o return 0; 59162035e776STheodore Ts'o return 1; 59172035e776STheodore Ts'o } 591824b58424STheodore Ts'o 591903010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5920ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 592103010a33STheodore Ts'o .name = "ext4", 5922152a0836SAl Viro .mount = ext4_mount, 5923ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5924ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5925ac27a0ecSDave Kleikamp }; 59267f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5927ac27a0ecSDave Kleikamp 5928e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5929e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5930e9e3bcecSEric Sandeen 59315dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5932ac27a0ecSDave Kleikamp { 5933e9e3bcecSEric Sandeen int i, err; 5934c9de560dSAlex Tomas 5935e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 593607c0c5d8SAl Viro ext4_li_info = NULL; 593707c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 593807c0c5d8SAl Viro 59399a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 594012e9b892SDmitry Monakhov ext4_check_flag_values(); 5941e9e3bcecSEric Sandeen 5942e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 5943e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5944e9e3bcecSEric Sandeen 594551865fdaSZheng Liu err = ext4_init_es(); 59466fd058f7STheodore Ts'o if (err) 59476fd058f7STheodore Ts'o return err; 594851865fdaSZheng Liu 594951865fdaSZheng Liu err = ext4_init_pageio(); 595051865fdaSZheng Liu if (err) 5951b5799018STheodore Ts'o goto out5; 595251865fdaSZheng Liu 59535dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5954bd2d0210STheodore Ts'o if (err) 5955b5799018STheodore Ts'o goto out4; 5956857ac889SLukas Czerner 5957b5799018STheodore Ts'o err = ext4_init_sysfs(); 5958dd68314cSTheodore Ts'o if (err) 5959b5799018STheodore Ts'o goto out3; 5960857ac889SLukas Czerner 59615dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5962ac27a0ecSDave Kleikamp if (err) 5963c9de560dSAlex Tomas goto out2; 5964ac27a0ecSDave Kleikamp err = init_inodecache(); 5965ac27a0ecSDave Kleikamp if (err) 5966ac27a0ecSDave Kleikamp goto out1; 596724b58424STheodore Ts'o register_as_ext3(); 59682035e776STheodore Ts'o register_as_ext2(); 596903010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5970ac27a0ecSDave Kleikamp if (err) 5971ac27a0ecSDave Kleikamp goto out; 5972bfff6873SLukas Czerner 5973ac27a0ecSDave Kleikamp return 0; 5974ac27a0ecSDave Kleikamp out: 597524b58424STheodore Ts'o unregister_as_ext2(); 597624b58424STheodore Ts'o unregister_as_ext3(); 5977ac27a0ecSDave Kleikamp destroy_inodecache(); 5978ac27a0ecSDave Kleikamp out1: 59795dabfc78STheodore Ts'o ext4_exit_mballoc(); 59809c191f70ST Makphaibulchoke out2: 5981b5799018STheodore Ts'o ext4_exit_sysfs(); 5982b5799018STheodore Ts'o out3: 5983dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5984b5799018STheodore Ts'o out4: 59855dabfc78STheodore Ts'o ext4_exit_pageio(); 5986b5799018STheodore Ts'o out5: 598751865fdaSZheng Liu ext4_exit_es(); 598851865fdaSZheng Liu 5989ac27a0ecSDave Kleikamp return err; 5990ac27a0ecSDave Kleikamp } 5991ac27a0ecSDave Kleikamp 59925dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5993ac27a0ecSDave Kleikamp { 5994bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 599524b58424STheodore Ts'o unregister_as_ext2(); 599624b58424STheodore Ts'o unregister_as_ext3(); 599703010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5998ac27a0ecSDave Kleikamp destroy_inodecache(); 59995dabfc78STheodore Ts'o ext4_exit_mballoc(); 6000b5799018STheodore Ts'o ext4_exit_sysfs(); 60015dabfc78STheodore Ts'o ext4_exit_system_zone(); 60025dabfc78STheodore Ts'o ext4_exit_pageio(); 6003dd12ed14SEric Sandeen ext4_exit_es(); 6004ac27a0ecSDave Kleikamp } 6005ac27a0ecSDave Kleikamp 6006ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 600783982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 6008ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 60097ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 60105dabfc78STheodore Ts'o module_init(ext4_init_fs) 60115dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 6012