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 315d3d1faf6SCurt Wohlgemuth 3161c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3171c13d5c0STheodore Ts'o unsigned int line) 3181c13d5c0STheodore Ts'o { 3191c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3201c13d5c0STheodore Ts'o 3211c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3221b46617bSTheodore Ts'o if (bdev_read_only(sb->s_bdev)) 3231b46617bSTheodore Ts'o return; 3241c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3251c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3261c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3271c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3281c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3291c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3301c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3311c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3321c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3331c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3341c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3351c13d5c0STheodore Ts'o } 33666e61a9eSTheodore Ts'o /* 33766e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 33866e61a9eSTheodore Ts'o * started already 33966e61a9eSTheodore Ts'o */ 34066e61a9eSTheodore Ts'o if (!es->s_error_count) 34166e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 342ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3431c13d5c0STheodore Ts'o } 3441c13d5c0STheodore Ts'o 3451c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3461c13d5c0STheodore Ts'o unsigned int line) 3471c13d5c0STheodore Ts'o { 3481c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3491c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3501c13d5c0STheodore Ts'o } 3511c13d5c0STheodore Ts'o 352bdfe0cbdSTheodore Ts'o /* 353bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 354bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 355bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 356bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 357bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 358bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 359bdfe0cbdSTheodore Ts'o */ 360bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 361bdfe0cbdSTheodore Ts'o { 362bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 363bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 364bdfe0cbdSTheodore Ts'o 365bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 366bdfe0cbdSTheodore Ts'o } 367bdfe0cbdSTheodore Ts'o 36818aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 36918aadd47SBobi Jam { 37018aadd47SBobi Jam struct super_block *sb = journal->j_private; 37118aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 37218aadd47SBobi Jam int error = is_journal_aborted(journal); 3735d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 37418aadd47SBobi Jam 3755d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 376a0154344SDaeho Jeong 377a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 378a0154344SDaeho Jeong 37918aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 3805d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 3815d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 3825d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 38318aadd47SBobi Jam list_del_init(&jce->jce_list); 38418aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 38518aadd47SBobi Jam jce->jce_func(sb, jce, error); 38618aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 38718aadd47SBobi Jam } 38818aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 38918aadd47SBobi Jam } 3901c13d5c0STheodore Ts'o 391ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 392ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 393ac27a0ecSDave Kleikamp * 394ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 395617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 396ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 397ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 398ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 399ac27a0ecSDave Kleikamp * write out the superblock safely. 400ac27a0ecSDave Kleikamp * 401dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 402d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 403ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 404ac27a0ecSDave Kleikamp */ 405ac27a0ecSDave Kleikamp 406617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 407ac27a0ecSDave Kleikamp { 408327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 409327eaf73STheodore Ts'o WARN_ON_ONCE(1); 410327eaf73STheodore Ts'o 411bc98a42cSDavid Howells if (sb_rdonly(sb)) 412ac27a0ecSDave Kleikamp return; 413ac27a0ecSDave Kleikamp 414ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 415617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 416ac27a0ecSDave Kleikamp 4174ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 418ac27a0ecSDave Kleikamp if (journal) 419dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 420ac27a0ecSDave Kleikamp } 421ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 422b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 4234418e141SDmitry Monakhov /* 4244418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 4254418e141SDmitry Monakhov * before ->s_flags update 4264418e141SDmitry Monakhov */ 4274418e141SDmitry Monakhov smp_wmb(); 4281751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 429ac27a0ecSDave Kleikamp } 4304327ba52SDaeho Jeong if (test_opt(sb, ERRORS_PANIC)) { 4314327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 4324327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 4334327ba52SDaeho Jeong return; 434617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 435ac27a0ecSDave Kleikamp sb->s_id); 436ac27a0ecSDave Kleikamp } 4374327ba52SDaeho Jeong } 438ac27a0ecSDave Kleikamp 439efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 440efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 441efbed4dcSTheodore Ts'o "EXT4-fs error") 442efbed4dcSTheodore Ts'o 44312062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 444c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 445ac27a0ecSDave Kleikamp { 4460ff2ea7dSJoe Perches struct va_format vaf; 447ac27a0ecSDave Kleikamp va_list args; 448ac27a0ecSDave Kleikamp 4490db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 4500db1ff22STheodore Ts'o return; 4510db1ff22STheodore Ts'o 452ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 453efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 454ac27a0ecSDave Kleikamp va_start(args, fmt); 4550ff2ea7dSJoe Perches vaf.fmt = fmt; 4560ff2ea7dSJoe Perches vaf.va = &args; 457efbed4dcSTheodore Ts'o printk(KERN_CRIT 458efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4590ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 460ac27a0ecSDave Kleikamp va_end(args); 461efbed4dcSTheodore Ts'o } 462f3fc0210STheodore Ts'o save_error_info(sb, function, line); 463617ba13bSMingming Cao ext4_handle_error(sb); 464ac27a0ecSDave Kleikamp } 465ac27a0ecSDave Kleikamp 466e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 467c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 468273df556SFrank Mayhar const char *fmt, ...) 469273df556SFrank Mayhar { 470273df556SFrank Mayhar va_list args; 471f7c21177STheodore Ts'o struct va_format vaf; 4721c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 473273df556SFrank Mayhar 4740db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 4750db1ff22STheodore Ts'o return; 4760db1ff22STheodore Ts'o 477ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 4781c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4791c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 480efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 481273df556SFrank Mayhar va_start(args, fmt); 482f7c21177STheodore Ts'o vaf.fmt = fmt; 483f7c21177STheodore Ts'o vaf.va = &args; 484c398eda0STheodore Ts'o if (block) 485d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 486d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 487d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 488d9ee81daSJoe Perches block, current->comm, &vaf); 489d9ee81daSJoe Perches else 490d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 491d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 492d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 493d9ee81daSJoe Perches current->comm, &vaf); 494273df556SFrank Mayhar va_end(args); 495efbed4dcSTheodore Ts'o } 496efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 497273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 498273df556SFrank Mayhar } 499273df556SFrank Mayhar 500e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 501f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 502f7c21177STheodore Ts'o const char *fmt, ...) 503273df556SFrank Mayhar { 504273df556SFrank Mayhar va_list args; 505f7c21177STheodore Ts'o struct va_format vaf; 5061c13d5c0STheodore Ts'o struct ext4_super_block *es; 507496ad9aaSAl Viro struct inode *inode = file_inode(file); 508273df556SFrank Mayhar char pathname[80], *path; 509273df556SFrank Mayhar 5100db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 5110db1ff22STheodore Ts'o return; 5120db1ff22STheodore Ts'o 513ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 5141c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 5151c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 516efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 5179bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 518f9a62d09SDan Carpenter if (IS_ERR(path)) 519273df556SFrank Mayhar path = "(unknown)"; 520f7c21177STheodore Ts'o va_start(args, fmt); 521f7c21177STheodore Ts'o vaf.fmt = fmt; 522f7c21177STheodore Ts'o vaf.va = &args; 523d9ee81daSJoe Perches if (block) 524d9ee81daSJoe Perches printk(KERN_CRIT 525d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 526d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 527d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 528d9ee81daSJoe Perches block, current->comm, path, &vaf); 529d9ee81daSJoe Perches else 530d9ee81daSJoe Perches printk(KERN_CRIT 531d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 532d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 533d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 534d9ee81daSJoe Perches current->comm, path, &vaf); 535273df556SFrank Mayhar va_end(args); 536efbed4dcSTheodore Ts'o } 537efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 538273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 539273df556SFrank Mayhar } 540273df556SFrank Mayhar 541722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 542ac27a0ecSDave Kleikamp char nbuf[16]) 543ac27a0ecSDave Kleikamp { 544ac27a0ecSDave Kleikamp char *errstr = NULL; 545ac27a0ecSDave Kleikamp 546ac27a0ecSDave Kleikamp switch (errno) { 5476a797d27SDarrick J. Wong case -EFSCORRUPTED: 5486a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 5496a797d27SDarrick J. Wong break; 5506a797d27SDarrick J. Wong case -EFSBADCRC: 5516a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 5526a797d27SDarrick J. Wong break; 553ac27a0ecSDave Kleikamp case -EIO: 554ac27a0ecSDave Kleikamp errstr = "IO failure"; 555ac27a0ecSDave Kleikamp break; 556ac27a0ecSDave Kleikamp case -ENOMEM: 557ac27a0ecSDave Kleikamp errstr = "Out of memory"; 558ac27a0ecSDave Kleikamp break; 559ac27a0ecSDave Kleikamp case -EROFS: 56078f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 56178f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 562ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 563ac27a0ecSDave Kleikamp else 564ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 565ac27a0ecSDave Kleikamp break; 566ac27a0ecSDave Kleikamp default: 567ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 568ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 569ac27a0ecSDave Kleikamp * NULL. */ 570ac27a0ecSDave Kleikamp if (nbuf) { 571ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 572ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 573ac27a0ecSDave Kleikamp errstr = nbuf; 574ac27a0ecSDave Kleikamp } 575ac27a0ecSDave Kleikamp break; 576ac27a0ecSDave Kleikamp } 577ac27a0ecSDave Kleikamp 578ac27a0ecSDave Kleikamp return errstr; 579ac27a0ecSDave Kleikamp } 580ac27a0ecSDave Kleikamp 581617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 582ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 583ac27a0ecSDave Kleikamp 584c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 585c398eda0STheodore Ts'o unsigned int line, int errno) 586ac27a0ecSDave Kleikamp { 587ac27a0ecSDave Kleikamp char nbuf[16]; 588ac27a0ecSDave Kleikamp const char *errstr; 589ac27a0ecSDave Kleikamp 5900db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 5910db1ff22STheodore Ts'o return; 5920db1ff22STheodore Ts'o 593ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 594ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 595ac27a0ecSDave Kleikamp * an error. */ 596bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 597ac27a0ecSDave Kleikamp return; 598ac27a0ecSDave Kleikamp 599efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 600617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 601c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 602c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 603efbed4dcSTheodore Ts'o } 604ac27a0ecSDave Kleikamp 605efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 606617ba13bSMingming Cao ext4_handle_error(sb); 607ac27a0ecSDave Kleikamp } 608ac27a0ecSDave Kleikamp 609ac27a0ecSDave Kleikamp /* 610617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 611ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 612ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 613ac27a0ecSDave Kleikamp * 614ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 615ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 616ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 617ac27a0ecSDave Kleikamp */ 618ac27a0ecSDave Kleikamp 619c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 620c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 621ac27a0ecSDave Kleikamp { 622651e1c3bSJoe Perches struct va_format vaf; 623ac27a0ecSDave Kleikamp va_list args; 624ac27a0ecSDave Kleikamp 6250db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 6260db1ff22STheodore Ts'o return; 6270db1ff22STheodore Ts'o 6281c13d5c0STheodore Ts'o save_error_info(sb, function, line); 629ac27a0ecSDave Kleikamp va_start(args, fmt); 630651e1c3bSJoe Perches vaf.fmt = fmt; 631651e1c3bSJoe Perches vaf.va = &args; 632651e1c3bSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: %pV\n", 633651e1c3bSJoe Perches sb->s_id, function, line, &vaf); 634ac27a0ecSDave Kleikamp va_end(args); 635ac27a0ecSDave Kleikamp 636bc98a42cSDavid Howells if (sb_rdonly(sb) == 0) { 637b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 6384ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 6394418e141SDmitry Monakhov /* 6404418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 6414418e141SDmitry Monakhov * before ->s_flags update 6424418e141SDmitry Monakhov */ 6434418e141SDmitry Monakhov smp_wmb(); 6441751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 645ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 646dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 6471c13d5c0STheodore Ts'o save_error_info(sb, function, line); 6481c13d5c0STheodore Ts'o } 6494327ba52SDaeho Jeong if (test_opt(sb, ERRORS_PANIC)) { 6504327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 6514327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 6524327ba52SDaeho Jeong return; 6531c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 654ac27a0ecSDave Kleikamp } 6554327ba52SDaeho Jeong } 656ac27a0ecSDave Kleikamp 657e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 658e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 659b31e1552SEric Sandeen { 6600ff2ea7dSJoe Perches struct va_format vaf; 661b31e1552SEric Sandeen va_list args; 662b31e1552SEric Sandeen 663efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 664efbed4dcSTheodore Ts'o return; 665efbed4dcSTheodore Ts'o 666b31e1552SEric Sandeen va_start(args, fmt); 6670ff2ea7dSJoe Perches vaf.fmt = fmt; 6680ff2ea7dSJoe Perches vaf.va = &args; 6690ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 670b31e1552SEric Sandeen va_end(args); 671b31e1552SEric Sandeen } 672b31e1552SEric Sandeen 673b03a2f7eSAndreas Dilger #define ext4_warning_ratelimit(sb) \ 674b03a2f7eSAndreas Dilger ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ 675b03a2f7eSAndreas Dilger "EXT4-fs warning") 676b03a2f7eSAndreas Dilger 67712062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 678c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 679ac27a0ecSDave Kleikamp { 6800ff2ea7dSJoe Perches struct va_format vaf; 681ac27a0ecSDave Kleikamp va_list args; 682ac27a0ecSDave Kleikamp 683b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 684efbed4dcSTheodore Ts'o return; 685efbed4dcSTheodore Ts'o 686ac27a0ecSDave Kleikamp va_start(args, fmt); 6870ff2ea7dSJoe Perches vaf.fmt = fmt; 6880ff2ea7dSJoe Perches vaf.va = &args; 6890ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6900ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 691ac27a0ecSDave Kleikamp va_end(args); 692ac27a0ecSDave Kleikamp } 693ac27a0ecSDave Kleikamp 694b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 695b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 696b03a2f7eSAndreas Dilger { 697b03a2f7eSAndreas Dilger struct va_format vaf; 698b03a2f7eSAndreas Dilger va_list args; 699b03a2f7eSAndreas Dilger 700b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 701b03a2f7eSAndreas Dilger return; 702b03a2f7eSAndreas Dilger 703b03a2f7eSAndreas Dilger va_start(args, fmt); 704b03a2f7eSAndreas Dilger vaf.fmt = fmt; 705b03a2f7eSAndreas Dilger vaf.va = &args; 706b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 707b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 708b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 709b03a2f7eSAndreas Dilger va_end(args); 710b03a2f7eSAndreas Dilger } 711b03a2f7eSAndreas Dilger 712e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 713e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 714e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 715e29136f8STheodore Ts'o const char *fmt, ...) 7165d1b1b3fSAneesh Kumar K.V __releases(bitlock) 7175d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 7185d1b1b3fSAneesh Kumar K.V { 7190ff2ea7dSJoe Perches struct va_format vaf; 7205d1b1b3fSAneesh Kumar K.V va_list args; 7215d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 7225d1b1b3fSAneesh Kumar K.V 7230db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7240db1ff22STheodore Ts'o return; 7250db1ff22STheodore Ts'o 726ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 7271c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 7281c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 7291c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 7300ff2ea7dSJoe Perches 731efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 7325d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 7330ff2ea7dSJoe Perches vaf.fmt = fmt; 7340ff2ea7dSJoe Perches vaf.va = &args; 73521149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 736e29136f8STheodore Ts'o sb->s_id, function, line, grp); 737e29136f8STheodore Ts'o if (ino) 7380ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 739e29136f8STheodore Ts'o if (block) 740efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 741efbed4dcSTheodore Ts'o (unsigned long long) block); 7420ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 7435d1b1b3fSAneesh Kumar K.V va_end(args); 744efbed4dcSTheodore Ts'o } 7455d1b1b3fSAneesh Kumar K.V 746327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 747327eaf73STheodore Ts'o WARN_ON_ONCE(1); 748327eaf73STheodore Ts'o 7495d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 750e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 7515d1b1b3fSAneesh Kumar K.V return; 7525d1b1b3fSAneesh Kumar K.V } 7531c13d5c0STheodore Ts'o 7545d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 75506f29cc8SZhouyi Zhou ext4_commit_super(sb, 1); 7565d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 7575d1b1b3fSAneesh Kumar K.V /* 7585d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 7595d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 7605d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 7615d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 7625d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 76325985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 7645d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 7655d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 7665d1b1b3fSAneesh Kumar K.V * more appropriate error code. 7675d1b1b3fSAneesh Kumar K.V */ 7685d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 7695d1b1b3fSAneesh Kumar K.V return; 7705d1b1b3fSAneesh Kumar K.V } 7715d1b1b3fSAneesh Kumar K.V 772db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 773db79e6d1SWang Shilong ext4_group_t group, 774db79e6d1SWang Shilong unsigned int flags) 775db79e6d1SWang Shilong { 776db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 777db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 778db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 779db79e6d1SWang Shilong 780db79e6d1SWang Shilong if ((flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) && 781db79e6d1SWang Shilong !EXT4_MB_GRP_BBITMAP_CORRUPT(grp)) { 782db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 783db79e6d1SWang Shilong grp->bb_free); 784db79e6d1SWang Shilong set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 785db79e6d1SWang Shilong &grp->bb_state); 786db79e6d1SWang Shilong } 787db79e6d1SWang Shilong 788db79e6d1SWang Shilong if ((flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) && 789db79e6d1SWang Shilong !EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) { 790db79e6d1SWang Shilong if (gdp) { 791db79e6d1SWang Shilong int count; 792db79e6d1SWang Shilong 793db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 794db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 795db79e6d1SWang Shilong count); 796db79e6d1SWang Shilong } 797db79e6d1SWang Shilong set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 798db79e6d1SWang Shilong &grp->bb_state); 799db79e6d1SWang Shilong } 800db79e6d1SWang Shilong } 801db79e6d1SWang Shilong 802617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 803ac27a0ecSDave Kleikamp { 804617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 805ac27a0ecSDave Kleikamp 806617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 807ac27a0ecSDave Kleikamp return; 808ac27a0ecSDave Kleikamp 80912062dddSEric Sandeen ext4_warning(sb, 810ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 811ac27a0ecSDave Kleikamp "running e2fsck is recommended", 812617ba13bSMingming Cao EXT4_DYNAMIC_REV); 813ac27a0ecSDave Kleikamp 814617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 815617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 816617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 817ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 818ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 819ac27a0ecSDave Kleikamp 820ac27a0ecSDave Kleikamp /* 821ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 822ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 823ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 824ac27a0ecSDave Kleikamp */ 825ac27a0ecSDave Kleikamp } 826ac27a0ecSDave Kleikamp 827ac27a0ecSDave Kleikamp /* 828ac27a0ecSDave Kleikamp * Open the external journal device 829ac27a0ecSDave Kleikamp */ 830b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 831ac27a0ecSDave Kleikamp { 832ac27a0ecSDave Kleikamp struct block_device *bdev; 833ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 834ac27a0ecSDave Kleikamp 835d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 836ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 837ac27a0ecSDave Kleikamp goto fail; 838ac27a0ecSDave Kleikamp return bdev; 839ac27a0ecSDave Kleikamp 840ac27a0ecSDave Kleikamp fail: 841b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 842ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 843ac27a0ecSDave Kleikamp return NULL; 844ac27a0ecSDave Kleikamp } 845ac27a0ecSDave Kleikamp 846ac27a0ecSDave Kleikamp /* 847ac27a0ecSDave Kleikamp * Release the journal device 848ac27a0ecSDave Kleikamp */ 8494385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 850ac27a0ecSDave Kleikamp { 8514385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 852ac27a0ecSDave Kleikamp } 853ac27a0ecSDave Kleikamp 8544385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 855ac27a0ecSDave Kleikamp { 856ac27a0ecSDave Kleikamp struct block_device *bdev; 857ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 858ac27a0ecSDave Kleikamp if (bdev) { 8594385bab1SAl Viro ext4_blkdev_put(bdev); 860ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 861ac27a0ecSDave Kleikamp } 862ac27a0ecSDave Kleikamp } 863ac27a0ecSDave Kleikamp 864ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 865ac27a0ecSDave Kleikamp { 866617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 867ac27a0ecSDave Kleikamp } 868ac27a0ecSDave Kleikamp 869617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 870ac27a0ecSDave Kleikamp { 871ac27a0ecSDave Kleikamp struct list_head *l; 872ac27a0ecSDave Kleikamp 873b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 874ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 875ac27a0ecSDave Kleikamp 876ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 877ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 878ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 879ac27a0ecSDave Kleikamp printk(KERN_ERR " " 880ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 881ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 882ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 883ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 884ac27a0ecSDave Kleikamp } 885ac27a0ecSDave Kleikamp } 886ac27a0ecSDave Kleikamp 887957153fcSJan Kara #ifdef CONFIG_QUOTA 888957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 889957153fcSJan Kara 890957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 891957153fcSJan Kara { 892957153fcSJan Kara int type; 893957153fcSJan Kara 894957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 895957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 896957153fcSJan Kara ext4_quota_off(sb, type); 897957153fcSJan Kara } 898957153fcSJan Kara #else 899957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 900957153fcSJan Kara { 901957153fcSJan Kara } 902957153fcSJan Kara #endif 903957153fcSJan Kara 904617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 905ac27a0ecSDave Kleikamp { 906617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 907617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 90897abd7d4STheodore Ts'o int aborted = 0; 909ef2cabf7SHidehiro Kawai int i, err; 910ac27a0ecSDave Kleikamp 911857ac889SLukas Czerner ext4_unregister_li_request(sb); 912957153fcSJan Kara ext4_quota_off_umount(sb); 913e0ccfd95SChristoph Hellwig 9142e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 9154c0425ffSMingming Cao 9160390131bSFrank Mayhar if (sbi->s_journal) { 91797abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 918ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 91947b4a50bSJan Kara sbi->s_journal = NULL; 92097abd7d4STheodore Ts'o if ((err < 0) && !aborted) 921c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 9220390131bSFrank Mayhar } 923d4edac31SJosef Bacik 924ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 925d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 9269105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 927d4edac31SJosef Bacik ext4_release_system_zone(sb); 928d4edac31SJosef Bacik ext4_mb_release(sb); 929d4edac31SJosef Bacik ext4_ext_release(sb); 930d4edac31SJosef Bacik 931bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 932e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 933ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 934ac27a0ecSDave Kleikamp } 935bc98a42cSDavid Howells if (!sb_rdonly(sb)) 936a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 937a8e25a83SArtem Bityutskiy 938ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 939ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 940b93b41d4SAl Viro kvfree(sbi->s_group_desc); 941b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 94257042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 943ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 944ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 94557042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 946c8585c6fSDaeho Jeong percpu_free_rwsem(&sbi->s_journal_flag_rwsem); 947ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 948a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 949ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 950ac27a0ecSDave Kleikamp #endif 951ac27a0ecSDave Kleikamp 952ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 953ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 954ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 955ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 956ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 957ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 958ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 959ac27a0ecSDave Kleikamp 96089d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 961f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 962ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 963ac27a0ecSDave Kleikamp /* 964ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 965ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 966ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 967ac27a0ecSDave Kleikamp */ 968ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 969f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 970617ba13bSMingming Cao ext4_blkdev_remove(sbi); 971ac27a0ecSDave Kleikamp } 972dec214d0STahsin Erdogan if (sbi->s_ea_inode_cache) { 973dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 974dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 975dec214d0STahsin Erdogan } 97647387409STahsin Erdogan if (sbi->s_ea_block_cache) { 97747387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 97847387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 9799c191f70ST Makphaibulchoke } 980c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 981c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 9829060dd2cSEric Sandeen brelse(sbi->s_sbh); 983ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 9843197ebdbSTheodore Ts'o /* 9853197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 9863197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 9873197ebdbSTheodore Ts'o */ 9883197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 9893197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 9900441984aSDarrick J. Wong if (sbi->s_chksum_driver) 9910441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 992705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 9935e405595SDan Williams fs_put_dax(sbi->s_daxdev); 994ac27a0ecSDave Kleikamp kfree(sbi); 995ac27a0ecSDave Kleikamp } 996ac27a0ecSDave Kleikamp 997e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 998ac27a0ecSDave Kleikamp 999ac27a0ecSDave Kleikamp /* 1000ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1001ac27a0ecSDave Kleikamp */ 1002617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1003ac27a0ecSDave Kleikamp { 1004617ba13bSMingming Cao struct ext4_inode_info *ei; 1005ac27a0ecSDave Kleikamp 1006e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 1007ac27a0ecSDave Kleikamp if (!ei) 1008ac27a0ecSDave Kleikamp return NULL; 10090b8e58a1SAndreas Dilger 1010ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1011202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1012c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 1013c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 10149a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 10159a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1016edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1017eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1018edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1019dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1020d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 10219d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 10227e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 1023d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 1024a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1025a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 102696c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1027a9e7f447SDmitry Monakhov #endif 10288aefcd55STheodore Ts'o ei->jinode = NULL; 10292e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1030744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1031b436b9beSJan Kara ei->i_sync_tid = 0; 1032b436b9beSJan Kara ei->i_datasync_tid = 0; 1033e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 10342e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1035ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1036ac27a0ecSDave Kleikamp } 1037ac27a0ecSDave Kleikamp 10387ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 10397ff9c073STheodore Ts'o { 10407ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 10417ff9c073STheodore Ts'o 10427ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 10437ff9c073STheodore Ts'o return drop; 10447ff9c073STheodore Ts'o } 10457ff9c073STheodore Ts'o 1046fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 1047fa0d7e3dSNick Piggin { 1048fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 1049fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1050fa0d7e3dSNick Piggin } 1051fa0d7e3dSNick Piggin 1052617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1053ac27a0ecSDave Kleikamp { 10549f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1055b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1056b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1057b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 10589f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 10599f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 10609f7dd93dSVasily Averin true); 10619f7dd93dSVasily Averin dump_stack(); 10629f7dd93dSVasily Averin } 1063fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 1064ac27a0ecSDave Kleikamp } 1065ac27a0ecSDave Kleikamp 106651cc5068SAlexey Dobriyan static void init_once(void *foo) 1067ac27a0ecSDave Kleikamp { 1068617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1069ac27a0ecSDave Kleikamp 1070ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1071ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 10720e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1073ea3d7209SJan Kara init_rwsem(&ei->i_mmap_sem); 1074ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1075ac27a0ecSDave Kleikamp } 1076ac27a0ecSDave Kleikamp 1077e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1078ac27a0ecSDave Kleikamp { 1079f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1080f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1081f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1082f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1083f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1084f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 108520c2df83SPaul Mundt init_once); 1086617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1087ac27a0ecSDave Kleikamp return -ENOMEM; 1088ac27a0ecSDave Kleikamp return 0; 1089ac27a0ecSDave Kleikamp } 1090ac27a0ecSDave Kleikamp 1091ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1092ac27a0ecSDave Kleikamp { 10938c0a8537SKirill A. Shutemov /* 10948c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 10958c0a8537SKirill A. Shutemov * destroy cache. 10968c0a8537SKirill A. Shutemov */ 10978c0a8537SKirill A. Shutemov rcu_barrier(); 1098617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1099ac27a0ecSDave Kleikamp } 1100ac27a0ecSDave Kleikamp 11010930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1102ac27a0ecSDave Kleikamp { 11030930fcc1SAl Viro invalidate_inode_buffers(inode); 1104dbd5768fSJan Kara clear_inode(inode); 11059f754758SChristoph Hellwig dquot_drop(inode); 1106c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 110751865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 11088aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 11098aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 11108aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 11118aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 11128aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 11138aefcd55STheodore Ts'o } 11143d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1115ac27a0ecSDave Kleikamp } 1116ac27a0ecSDave Kleikamp 11171b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 11181b961ac0SChristoph Hellwig u64 ino, u32 generation) 1119ac27a0ecSDave Kleikamp { 1120ac27a0ecSDave Kleikamp struct inode *inode; 1121ac27a0ecSDave Kleikamp 1122617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1123ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1124617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1125ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1126ac27a0ecSDave Kleikamp 1127ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1128ac27a0ecSDave Kleikamp * 1129617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1130ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1131ac27a0ecSDave Kleikamp * 1132ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1133ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1134ac27a0ecSDave Kleikamp */ 1135f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 11361d1fe1eeSDavid Howells if (IS_ERR(inode)) 11371d1fe1eeSDavid Howells return ERR_CAST(inode); 11381d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1139ac27a0ecSDave Kleikamp iput(inode); 1140ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1141ac27a0ecSDave Kleikamp } 11421b961ac0SChristoph Hellwig 11431b961ac0SChristoph Hellwig return inode; 1144ac27a0ecSDave Kleikamp } 11451b961ac0SChristoph Hellwig 11461b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 11471b961ac0SChristoph Hellwig int fh_len, int fh_type) 11481b961ac0SChristoph Hellwig { 11491b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 11501b961ac0SChristoph Hellwig ext4_nfs_get_inode); 11511b961ac0SChristoph Hellwig } 11521b961ac0SChristoph Hellwig 11531b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 11541b961ac0SChristoph Hellwig int fh_len, int fh_type) 11551b961ac0SChristoph Hellwig { 11561b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 11571b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1158ac27a0ecSDave Kleikamp } 1159ac27a0ecSDave Kleikamp 1160c39a7f84SToshiyuki Okajima /* 1161c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1162c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1163c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1164c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1165c39a7f84SToshiyuki Okajima */ 11660b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11670b8e58a1SAndreas Dilger gfp_t wait) 1168c39a7f84SToshiyuki Okajima { 1169c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1170c39a7f84SToshiyuki Okajima 1171c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1172c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1173c39a7f84SToshiyuki Okajima return 0; 1174c39a7f84SToshiyuki Okajima if (journal) 1175c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1176d0164adcSMel Gorman wait & ~__GFP_DIRECT_RECLAIM); 1177c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1178c39a7f84SToshiyuki Okajima } 1179c39a7f84SToshiyuki Okajima 1180a7550b30SJaegeuk Kim #ifdef CONFIG_EXT4_FS_ENCRYPTION 1181a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1182a7550b30SJaegeuk Kim { 1183a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1184a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1185a7550b30SJaegeuk Kim } 1186a7550b30SJaegeuk Kim 1187a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1188a7550b30SJaegeuk Kim void *fs_data) 1189a7550b30SJaegeuk Kim { 11902f8f5e76SEric Biggers handle_t *handle = fs_data; 1191c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1192a7550b30SJaegeuk Kim 11939ce0151aSEric Biggers /* 11949ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 11959ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 11969ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 11979ce0151aSEric Biggers * the filename "lost+found" itself. 11989ce0151aSEric Biggers */ 11999ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 12009ce0151aSEric Biggers return -EPERM; 1201a7550b30SJaegeuk Kim 12027d3e06a8SRoss Zwisler if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) 12037d3e06a8SRoss Zwisler return -EINVAL; 12047d3e06a8SRoss Zwisler 120594840e3cSEric Biggers res = ext4_convert_inline_data(inode); 120694840e3cSEric Biggers if (res) 120794840e3cSEric Biggers return res; 120894840e3cSEric Biggers 12092f8f5e76SEric Biggers /* 12102f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 12112f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 12122f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 12132f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 12142f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 12152f8f5e76SEric Biggers */ 12162f8f5e76SEric Biggers 12172f8f5e76SEric Biggers if (handle) { 12182f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 12192f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 12202f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 12212f8f5e76SEric Biggers ctx, len, 0); 1222a7550b30SJaegeuk Kim if (!res) { 1223a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1224a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1225a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1226a3caa24bSJan Kara /* 12272ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 12282ee6a576SEric Biggers * S_DAX may be disabled 1229a3caa24bSJan Kara */ 1230a3caa24bSJan Kara ext4_set_inode_flags(inode); 1231a7550b30SJaegeuk Kim } 1232a7550b30SJaegeuk Kim return res; 1233a7550b30SJaegeuk Kim } 1234a7550b30SJaegeuk Kim 1235b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1236b8cb5a54STahsin Erdogan if (res) 1237b8cb5a54STahsin Erdogan return res; 12382f8f5e76SEric Biggers retry: 1239af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1240af65207cSTahsin Erdogan &credits); 1241dec214d0STahsin Erdogan if (res) 1242dec214d0STahsin Erdogan return res; 1243dec214d0STahsin Erdogan 1244c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1245a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1246a7550b30SJaegeuk Kim return PTR_ERR(handle); 1247a7550b30SJaegeuk Kim 12482f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 12492f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 12502f8f5e76SEric Biggers ctx, len, 0); 1251a7550b30SJaegeuk Kim if (!res) { 1252a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 12532ee6a576SEric Biggers /* 12542ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 12552ee6a576SEric Biggers * S_DAX may be disabled 12562ee6a576SEric Biggers */ 1257a3caa24bSJan Kara ext4_set_inode_flags(inode); 1258a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1259a7550b30SJaegeuk Kim if (res) 1260a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1261a7550b30SJaegeuk Kim } 1262a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 12632f8f5e76SEric Biggers 12642f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 12652f8f5e76SEric Biggers goto retry; 1266a7550b30SJaegeuk Kim if (!res) 1267a7550b30SJaegeuk Kim res = res2; 1268a7550b30SJaegeuk Kim return res; 1269a7550b30SJaegeuk Kim } 1270a7550b30SJaegeuk Kim 1271c250b7ddSEric Biggers static bool ext4_dummy_context(struct inode *inode) 1272a7550b30SJaegeuk Kim { 1273a7550b30SJaegeuk Kim return DUMMY_ENCRYPTION_ENABLED(EXT4_SB(inode->i_sb)); 1274a7550b30SJaegeuk Kim } 1275a7550b30SJaegeuk Kim 1276a7550b30SJaegeuk Kim static unsigned ext4_max_namelen(struct inode *inode) 1277a7550b30SJaegeuk Kim { 1278a7550b30SJaegeuk Kim return S_ISLNK(inode->i_mode) ? inode->i_sb->s_blocksize : 1279a7550b30SJaegeuk Kim EXT4_NAME_LEN; 1280a7550b30SJaegeuk Kim } 1281a7550b30SJaegeuk Kim 12826f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1283a5d431efSEric Biggers .key_prefix = "ext4:", 1284a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1285a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1286a7550b30SJaegeuk Kim .dummy_context = ext4_dummy_context, 1287a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1288a7550b30SJaegeuk Kim .max_namelen = ext4_max_namelen, 1289a7550b30SJaegeuk Kim }; 1290a7550b30SJaegeuk Kim #endif 1291a7550b30SJaegeuk Kim 1292ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1293d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1294689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1295ac27a0ecSDave Kleikamp 1296617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1297617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1298617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1299617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1300617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 13016f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 13028c54ca9cSAl Viro const struct path *path); 1303617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1304617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1305ac27a0ecSDave Kleikamp size_t len, loff_t off); 1306617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1307ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 13087c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 13097c319d32SAditya Kali unsigned int flags); 13107c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 13118f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid); 1312ac27a0ecSDave Kleikamp 131396c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 131496c7e0d9SJan Kara { 131596c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 131696c7e0d9SJan Kara } 131796c7e0d9SJan Kara 131861e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 131960e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1320617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1321617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1322617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1323617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1324a5b5ee32SJan Kara .write_info = ext4_write_info, 1325a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1326a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1327040cb378SLi Xi .get_projid = ext4_get_projid, 13287a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 13298f0e8746STheodore Ts'o .get_next_id = ext4_get_next_id, 1330ac27a0ecSDave Kleikamp }; 1331ac27a0ecSDave Kleikamp 13320d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1333617ba13bSMingming Cao .quota_on = ext4_quota_on, 1334ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1335287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 13360a240339SJan Kara .get_state = dquot_get_state, 1337287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1338287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 13396332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 13406332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1341ac27a0ecSDave Kleikamp }; 1342ac27a0ecSDave Kleikamp #endif 1343ac27a0ecSDave Kleikamp 1344ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1345617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1346617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1347617ba13bSMingming Cao .write_inode = ext4_write_inode, 1348617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 13497ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 13500930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1351617ba13bSMingming Cao .put_super = ext4_put_super, 1352617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1353c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1354c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1355617ba13bSMingming Cao .statfs = ext4_statfs, 1356617ba13bSMingming Cao .remount_fs = ext4_remount, 1357617ba13bSMingming Cao .show_options = ext4_show_options, 1358ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1359617ba13bSMingming Cao .quota_read = ext4_quota_read, 1360617ba13bSMingming Cao .quota_write = ext4_quota_write, 136196c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1362ac27a0ecSDave Kleikamp #endif 1363c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1364ac27a0ecSDave Kleikamp }; 1365ac27a0ecSDave Kleikamp 136639655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 13671b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 13681b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1369617ba13bSMingming Cao .get_parent = ext4_get_parent, 1370ac27a0ecSDave Kleikamp }; 1371ac27a0ecSDave Kleikamp 1372ac27a0ecSDave Kleikamp enum { 1373ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1374ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 137572578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1376ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 137772578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1378ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1379ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1380ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 13816ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 1382ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 13835a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1384ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 138549da9392SJan Kara Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax, 1386327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 1387327eaf73STheodore Ts'o Opt_nowarn_on_error, Opt_mblk_io_submit, 1388670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 13891449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 13905328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1391744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1392fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1393cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 1394ac27a0ecSDave Kleikamp }; 1395ac27a0ecSDave Kleikamp 1396a447c093SSteven Whitehouse static const match_table_t tokens = { 1397ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1398ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1399ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1400ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1401ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1402ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1403ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1404ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1405ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1406ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1407ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1408ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1409ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1410ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 141172578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 141272578c33STheodore Ts'o {Opt_removed, "orlov"}, 1413ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1414ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1415ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1416ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1417e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 14185a916be1STheodore Ts'o {Opt_noload, "noload"}, 141972578c33STheodore Ts'o {Opt_removed, "nobh"}, 142072578c33STheodore Ts'o {Opt_removed, "bh"}, 1421ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 142230773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 142330773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1424ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1425ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1426818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1427c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1428818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1429ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1430ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1431ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1432ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 14335bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 14345bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1435ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1436ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1437ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1438ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1439ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1440ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 14415a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1442ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1443ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1444ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1445ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 144649da9392SJan Kara {Opt_prjquota, "prjquota"}, 1447ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 144806705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 144906705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 145025ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1451923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 1452c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 145364769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1454327eaf73STheodore Ts'o {Opt_warn_on_error, "warn_on_error"}, 1455327eaf73STheodore Ts'o {Opt_nowarn_on_error, "nowarn_on_error"}, 1456a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1457a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1458670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1459dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 146036ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 146136ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 14626fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 14636fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1464240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1465b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1466afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 146706705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 146806705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1469744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1470744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 14715328e635SEric Sandeen {Opt_discard, "discard"}, 14725328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1473fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1474fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1475fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1476df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 14776ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 1478cdb7ee4cSTahsin Erdogan {Opt_nombcache, "nombcache"}, 1479cdb7ee4cSTahsin Erdogan {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ 1480c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1481c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1482c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1483c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1484c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1485f3f12faaSJosef Bacik {Opt_err, NULL}, 1486ac27a0ecSDave Kleikamp }; 1487ac27a0ecSDave Kleikamp 1488617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1489ac27a0ecSDave Kleikamp { 1490617ba13bSMingming Cao ext4_fsblk_t sb_block; 1491ac27a0ecSDave Kleikamp char *options = (char *) *data; 1492ac27a0ecSDave Kleikamp 1493ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1494ac27a0ecSDave Kleikamp return 1; /* Default location */ 14950b8e58a1SAndreas Dilger 1496ac27a0ecSDave Kleikamp options += 3; 14970b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1498ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1499ac27a0ecSDave Kleikamp if (*options && *options != ',') { 15004776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1501ac27a0ecSDave Kleikamp (char *) *data); 1502ac27a0ecSDave Kleikamp return 1; 1503ac27a0ecSDave Kleikamp } 1504ac27a0ecSDave Kleikamp if (*options == ',') 1505ac27a0ecSDave Kleikamp options++; 1506ac27a0ecSDave Kleikamp *data = (void *) options; 15070b8e58a1SAndreas Dilger 1508ac27a0ecSDave Kleikamp return sb_block; 1509ac27a0ecSDave Kleikamp } 1510ac27a0ecSDave Kleikamp 1511b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1512d6006186SEric Biggers static const char deprecated_msg[] = 1513d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1514437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1515b3881f74STheodore Ts'o 151656c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 151756c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 151856c50f11SDmitry Monakhov { 151956c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 152056c50f11SDmitry Monakhov char *qname; 152103dafb5fSChen Gang int ret = -1; 152256c50f11SDmitry Monakhov 152356c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 152456c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 152556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 152656c50f11SDmitry Monakhov "Cannot change journaled " 152756c50f11SDmitry Monakhov "quota options when quota turned on"); 152857f73c2cSTheodore Ts'o return -1; 152956c50f11SDmitry Monakhov } 1530e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1531c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, "Journaled quota options " 1532c325a67cSTheodore Ts'o "ignored when QUOTA feature is enabled"); 1533c325a67cSTheodore Ts'o return 1; 1534262b4662SJan Kara } 153556c50f11SDmitry Monakhov qname = match_strdup(args); 153656c50f11SDmitry Monakhov if (!qname) { 153756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 153856c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 153957f73c2cSTheodore Ts'o return -1; 154056c50f11SDmitry Monakhov } 154103dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 154203dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 154303dafb5fSChen Gang ret = 1; 154403dafb5fSChen Gang else 154556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 154603dafb5fSChen Gang "%s quota file already specified", 154703dafb5fSChen Gang QTYPE2NAME(qtype)); 154803dafb5fSChen Gang goto errout; 154956c50f11SDmitry Monakhov } 155003dafb5fSChen Gang if (strchr(qname, '/')) { 155156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 155256c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 155303dafb5fSChen Gang goto errout; 155456c50f11SDmitry Monakhov } 155503dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1556fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 155756c50f11SDmitry Monakhov return 1; 155803dafb5fSChen Gang errout: 155903dafb5fSChen Gang kfree(qname); 156003dafb5fSChen Gang return ret; 156156c50f11SDmitry Monakhov } 156256c50f11SDmitry Monakhov 156356c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 156456c50f11SDmitry Monakhov { 156556c50f11SDmitry Monakhov 156656c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 156756c50f11SDmitry Monakhov 156856c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 156956c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 157056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 157156c50f11SDmitry Monakhov " when quota turned on"); 157257f73c2cSTheodore Ts'o return -1; 157356c50f11SDmitry Monakhov } 157403dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 157556c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 157656c50f11SDmitry Monakhov return 1; 157756c50f11SDmitry Monakhov } 157856c50f11SDmitry Monakhov #endif 157956c50f11SDmitry Monakhov 158026092bf5STheodore Ts'o #define MOPT_SET 0x0001 158126092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 158226092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 158326092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 158426092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 158526092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 158626092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 158726092bf5STheodore Ts'o #define MOPT_Q 0 158826092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 158926092bf5STheodore Ts'o #else 159026092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 159126092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 159226092bf5STheodore Ts'o #endif 159326092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 15948dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 15958dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 15968dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1597ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 159826092bf5STheodore Ts'o 159926092bf5STheodore Ts'o static const struct mount_opts { 160026092bf5STheodore Ts'o int token; 160126092bf5STheodore Ts'o int mount_opt; 160226092bf5STheodore Ts'o int flags; 160326092bf5STheodore Ts'o } ext4_mount_opts[] = { 160426092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 160526092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 160626092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 160726092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 160826092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 160926092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 16108dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 16118dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 16128dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 16138dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 161426092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 161526092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 16168dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 16178dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 16188dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 161959d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1620327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 1621327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 1622c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1623c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 16248dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 16251e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 162626092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 16278dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 16281e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 16298dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 163026092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 163126092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 163226092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 16338dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 16347915a861SAles Novak MOPT_NO_EXT2}, 16358dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 16367915a861SAles Novak MOPT_NO_EXT2}, 163726092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 163826092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 163926092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 164026092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 164126092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 164226092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 164326092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 164426092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 164526092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 164626092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 1647923ae0ffSRoss Zwisler {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, 164826092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 16490efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 16500efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 16515ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 16525ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 16535ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 16548dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 16558dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 16568dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 16578dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 165826092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 165926092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 166026092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 166126092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 166226092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 166326092bf5STheodore Ts'o #else 166426092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 166526092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 166626092bf5STheodore Ts'o #endif 166726092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 166826092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 1669670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 167026092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 167126092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 167226092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 167326092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 167426092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 167549da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 167649da9392SJan Kara MOPT_SET | MOPT_Q}, 167726092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 167849da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 167949da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 168026092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 168126092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 168226092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 168326092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 168426092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 168526092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 168626092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1687df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 16886ddb2447STheodore Ts'o {Opt_test_dummy_encryption, 0, MOPT_GTE0}, 1689cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 169026092bf5STheodore Ts'o {Opt_err, 0, 0} 169126092bf5STheodore Ts'o }; 169226092bf5STheodore Ts'o 169326092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 169426092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 169526092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 169626092bf5STheodore Ts'o { 169726092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 169826092bf5STheodore Ts'o const struct mount_opts *m; 169908cefc7aSEric W. Biederman kuid_t uid; 170008cefc7aSEric W. Biederman kgid_t gid; 170126092bf5STheodore Ts'o int arg = 0; 170226092bf5STheodore Ts'o 170357f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 170457f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 170557f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 170657f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 170757f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 170857f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 170957f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 171057f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 171157f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 171257f73c2cSTheodore Ts'o #endif 171326092bf5STheodore Ts'o switch (token) { 1714f7048605STheodore Ts'o case Opt_noacl: 1715f7048605STheodore Ts'o case Opt_nouser_xattr: 1716f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1717f7048605STheodore Ts'o break; 171826092bf5STheodore Ts'o case Opt_sb: 171926092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 172026092bf5STheodore Ts'o case Opt_removed: 17215f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 172226092bf5STheodore Ts'o return 1; 172326092bf5STheodore Ts'o case Opt_abort: 172426092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 172526092bf5STheodore Ts'o return 1; 172626092bf5STheodore Ts'o case Opt_i_version: 1727357fdad0SMatthew Garrett sb->s_flags |= SB_I_VERSION; 172826092bf5STheodore Ts'o return 1; 1729a26f4992STheodore Ts'o case Opt_lazytime: 17301751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 1731a26f4992STheodore Ts'o return 1; 1732a26f4992STheodore Ts'o case Opt_nolazytime: 17331751e8a6SLinus Torvalds sb->s_flags &= ~SB_LAZYTIME; 1734a26f4992STheodore Ts'o return 1; 173526092bf5STheodore Ts'o } 173626092bf5STheodore Ts'o 17375f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 17385f3633e3SJan Kara if (token == m->token) 17395f3633e3SJan Kara break; 17405f3633e3SJan Kara 17415f3633e3SJan Kara if (m->token == Opt_err) { 17425f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 17435f3633e3SJan Kara "or missing value", opt); 17445f3633e3SJan Kara return -1; 17455f3633e3SJan Kara } 17465f3633e3SJan Kara 17478dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 17488dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 17498dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 17508dc0aa8cSTheodore Ts'o return -1; 17518dc0aa8cSTheodore Ts'o } 17528dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 17538dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 17548dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 17558dc0aa8cSTheodore Ts'o return -1; 17568dc0aa8cSTheodore Ts'o } 17578dc0aa8cSTheodore Ts'o 1758ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 17590efb3b23SJan Kara return -1; 176026092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 176126092bf5STheodore Ts'o return -1; 1762c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 1763c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 176426092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 17651e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 17661e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 1767c93cf2d7SDmitry Monakhov } else 1768c93cf2d7SDmitry Monakhov return -1; 1769c93cf2d7SDmitry Monakhov } 177026092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 177126092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 177226092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 177326092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 177426092bf5STheodore Ts'o "options when quota turned on"); 177526092bf5STheodore Ts'o return -1; 177626092bf5STheodore Ts'o } 177726092bf5STheodore Ts'o 177826092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 177926092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 178026092bf5STheodore Ts'o } else if (token == Opt_commit) { 178126092bf5STheodore Ts'o if (arg == 0) 178226092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 178326092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 1784670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 1785670e9875STheodore Ts'o sbi->s_want_extra_isize = arg; 178626092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 178726092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 178826092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 178926092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 179026092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1791e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1792e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1793e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1794e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 179526092bf5STheodore Ts'o return -1; 179626092bf5STheodore Ts'o } 179726092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 179826092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 179926092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 180026092bf5STheodore Ts'o if (!args->from) 180126092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 180226092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1803df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1804df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 180526092bf5STheodore Ts'o } else if (token == Opt_stripe) { 180626092bf5STheodore Ts'o sbi->s_stripe = arg; 18070efb3b23SJan Kara } else if (token == Opt_resuid) { 18080efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 18090efb3b23SJan Kara if (!uid_valid(uid)) { 18105f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 18110efb3b23SJan Kara return -1; 18120efb3b23SJan Kara } 18130efb3b23SJan Kara sbi->s_resuid = uid; 18140efb3b23SJan Kara } else if (token == Opt_resgid) { 18150efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 18160efb3b23SJan Kara if (!gid_valid(gid)) { 18175f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 18180efb3b23SJan Kara return -1; 18190efb3b23SJan Kara } 18200efb3b23SJan Kara sbi->s_resgid = gid; 18210efb3b23SJan Kara } else if (token == Opt_journal_dev) { 18220efb3b23SJan Kara if (is_remount) { 18230efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 18240efb3b23SJan Kara "Cannot specify journal on remount"); 18250efb3b23SJan Kara return -1; 18260efb3b23SJan Kara } 18270efb3b23SJan Kara *journal_devnum = arg; 1828ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1829ad4eec61SEric Sandeen char *journal_path; 1830ad4eec61SEric Sandeen struct inode *journal_inode; 1831ad4eec61SEric Sandeen struct path path; 1832ad4eec61SEric Sandeen int error; 1833ad4eec61SEric Sandeen 1834ad4eec61SEric Sandeen if (is_remount) { 1835ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1836ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1837ad4eec61SEric Sandeen return -1; 1838ad4eec61SEric Sandeen } 1839ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1840ad4eec61SEric Sandeen if (!journal_path) { 1841ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1842ad4eec61SEric Sandeen "journal device string"); 1843ad4eec61SEric Sandeen return -1; 1844ad4eec61SEric Sandeen } 1845ad4eec61SEric Sandeen 1846ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1847ad4eec61SEric Sandeen if (error) { 1848ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1849ad4eec61SEric Sandeen "journal device path: error %d", error); 1850ad4eec61SEric Sandeen kfree(journal_path); 1851ad4eec61SEric Sandeen return -1; 1852ad4eec61SEric Sandeen } 1853ad4eec61SEric Sandeen 18542b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 1855ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1856ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1857ad4eec61SEric Sandeen "is not a block device", journal_path); 1858ad4eec61SEric Sandeen path_put(&path); 1859ad4eec61SEric Sandeen kfree(journal_path); 1860ad4eec61SEric Sandeen return -1; 1861ad4eec61SEric Sandeen } 1862ad4eec61SEric Sandeen 1863ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1864ad4eec61SEric Sandeen path_put(&path); 1865ad4eec61SEric Sandeen kfree(journal_path); 18660efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 18670efb3b23SJan Kara if (arg > 7) { 18685f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 18690efb3b23SJan Kara " (must be 0-7)"); 18700efb3b23SJan Kara return -1; 18710efb3b23SJan Kara } 18720efb3b23SJan Kara *journal_ioprio = 18730efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 18746ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 18756ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 18766ddb2447STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; 18776ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 18786ddb2447STheodore Ts'o "Test dummy encryption mode enabled"); 18796ddb2447STheodore Ts'o #else 18806ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 18816ddb2447STheodore Ts'o "Test dummy encryption mount option ignored"); 18826ddb2447STheodore Ts'o #endif 188326092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 188426092bf5STheodore Ts'o if (is_remount) { 188526092bf5STheodore Ts'o if (!sbi->s_journal) 188626092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 18875f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 188826092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 188926092bf5STheodore Ts'o "Cannot change data mode on remount"); 189026092bf5STheodore Ts'o return -1; 189126092bf5STheodore Ts'o } 189226092bf5STheodore Ts'o } else { 189326092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 189426092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 189526092bf5STheodore Ts'o } 189626092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 189726092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 189826092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 189926092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 19005f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 19015f3633e3SJan Kara "quota options when quota turned on"); 190226092bf5STheodore Ts'o return -1; 190326092bf5STheodore Ts'o } 1904e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1905c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, 1906c325a67cSTheodore Ts'o "Quota format mount options ignored " 1907262b4662SJan Kara "when QUOTA feature is enabled"); 1908c325a67cSTheodore Ts'o return 1; 1909262b4662SJan Kara } 191026092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 191126092bf5STheodore Ts'o #endif 1912923ae0ffSRoss Zwisler } else if (token == Opt_dax) { 1913ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 1914ef83b6e8SDan Williams ext4_msg(sb, KERN_WARNING, 1915ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 1916ef83b6e8SDan Williams sbi->s_mount_opt |= m->mount_opt; 1917ef83b6e8SDan Williams #else 1918923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 1919923ae0ffSRoss Zwisler return -1; 1920923ae0ffSRoss Zwisler #endif 19217915a861SAles Novak } else if (token == Opt_data_err_abort) { 19227915a861SAles Novak sbi->s_mount_opt |= m->mount_opt; 19237915a861SAles Novak } else if (token == Opt_data_err_ignore) { 19247915a861SAles Novak sbi->s_mount_opt &= ~m->mount_opt; 192526092bf5STheodore Ts'o } else { 192626092bf5STheodore Ts'o if (!args->from) 192726092bf5STheodore Ts'o arg = 1; 192826092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 192926092bf5STheodore Ts'o arg = !arg; 193026092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 193126092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 193226092bf5STheodore Ts'o "buggy handling of option %s", opt); 193326092bf5STheodore Ts'o WARN_ON(1); 193426092bf5STheodore Ts'o return -1; 193526092bf5STheodore Ts'o } 193626092bf5STheodore Ts'o if (arg != 0) 193726092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 193826092bf5STheodore Ts'o else 193926092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 194026092bf5STheodore Ts'o } 194126092bf5STheodore Ts'o return 1; 194226092bf5STheodore Ts'o } 194326092bf5STheodore Ts'o 1944ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1945c3191067STheodore Ts'o unsigned long *journal_devnum, 1946b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1947661aa520SEric Sandeen int is_remount) 1948ac27a0ecSDave Kleikamp { 1949617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1950ac27a0ecSDave Kleikamp char *p; 1951ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 195226092bf5STheodore Ts'o int token; 1953ac27a0ecSDave Kleikamp 1954ac27a0ecSDave Kleikamp if (!options) 1955ac27a0ecSDave Kleikamp return 1; 1956ac27a0ecSDave Kleikamp 1957ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1958ac27a0ecSDave Kleikamp if (!*p) 1959ac27a0ecSDave Kleikamp continue; 196015121c18SEric Sandeen /* 196115121c18SEric Sandeen * Initialize args struct so we know whether arg was 196215121c18SEric Sandeen * found; some options take optional arguments. 196315121c18SEric Sandeen */ 1964caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1965ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 196626092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 196726092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1968ac27a0ecSDave Kleikamp return 0; 1969ac27a0ecSDave Kleikamp } 1970ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 197149da9392SJan Kara /* 197249da9392SJan Kara * We do the test below only for project quotas. 'usrquota' and 197349da9392SJan Kara * 'grpquota' mount options are allowed even without quota feature 197449da9392SJan Kara * to support legacy quotas in quota files. 197549da9392SJan Kara */ 197649da9392SJan Kara if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { 197749da9392SJan Kara ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " 197849da9392SJan Kara "Cannot enable project quota enforcement."); 197949da9392SJan Kara return 0; 198049da9392SJan Kara } 198149da9392SJan Kara if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1982482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1983fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1984ac27a0ecSDave Kleikamp 1985482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1986fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1987ac27a0ecSDave Kleikamp 198856c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1989b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1990b31e1552SEric Sandeen "format mixing"); 1991ac27a0ecSDave Kleikamp return 0; 1992ac27a0ecSDave Kleikamp } 1993ac27a0ecSDave Kleikamp 1994ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1995b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1996b31e1552SEric Sandeen "not specified"); 1997ac27a0ecSDave Kleikamp return 0; 1998ac27a0ecSDave Kleikamp } 1999ac27a0ecSDave Kleikamp } 2000ac27a0ecSDave Kleikamp #endif 2001261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 2002261cb20cSJan Kara int blocksize = 2003261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 2004261cb20cSJan Kara 200509cbfeafSKirill A. Shutemov if (blocksize < PAGE_SIZE) { 2006261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 2007261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 2008261cb20cSJan Kara return 0; 2009261cb20cSJan Kara } 2010261cb20cSJan Kara } 2011ac27a0ecSDave Kleikamp return 1; 2012ac27a0ecSDave Kleikamp } 2013ac27a0ecSDave Kleikamp 20142adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 20152adf6da8STheodore Ts'o struct super_block *sb) 20162adf6da8STheodore Ts'o { 20172adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 20182adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 20192adf6da8STheodore Ts'o 20202adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 20212adf6da8STheodore Ts'o char *fmtname = ""; 20222adf6da8STheodore Ts'o 20232adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 20242adf6da8STheodore Ts'o case QFMT_VFS_OLD: 20252adf6da8STheodore Ts'o fmtname = "vfsold"; 20262adf6da8STheodore Ts'o break; 20272adf6da8STheodore Ts'o case QFMT_VFS_V0: 20282adf6da8STheodore Ts'o fmtname = "vfsv0"; 20292adf6da8STheodore Ts'o break; 20302adf6da8STheodore Ts'o case QFMT_VFS_V1: 20312adf6da8STheodore Ts'o fmtname = "vfsv1"; 20322adf6da8STheodore Ts'o break; 20332adf6da8STheodore Ts'o } 20342adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 20352adf6da8STheodore Ts'o } 20362adf6da8STheodore Ts'o 20372adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 2038a068acf2SKees Cook seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); 20392adf6da8STheodore Ts'o 20402adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 2041a068acf2SKees Cook seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); 20422adf6da8STheodore Ts'o #endif 20432adf6da8STheodore Ts'o } 20442adf6da8STheodore Ts'o 20455a916be1STheodore Ts'o static const char *token2str(int token) 20465a916be1STheodore Ts'o { 204750df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 20485a916be1STheodore Ts'o 20495a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 20505a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 20515a916be1STheodore Ts'o break; 20525a916be1STheodore Ts'o return t->pattern; 20535a916be1STheodore Ts'o } 20545a916be1STheodore Ts'o 20552adf6da8STheodore Ts'o /* 20562adf6da8STheodore Ts'o * Show an option if 20572adf6da8STheodore Ts'o * - it's set to a non-default value OR 20582adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 20592adf6da8STheodore Ts'o */ 206066acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 206166acdcf4STheodore Ts'o int nodefs) 20622adf6da8STheodore Ts'o { 20632adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 20642adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 206568afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 20665a916be1STheodore Ts'o const struct mount_opts *m; 206766acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 20682adf6da8STheodore Ts'o 206966acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 207066acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 20712adf6da8STheodore Ts'o 20722adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 20735a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 20745a916be1STheodore Ts'o 20755a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 20765a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 20775a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 20785a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 20795a916be1STheodore Ts'o continue; 208068afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 20815a916be1STheodore Ts'o continue; /* skip if same as the default */ 20825a916be1STheodore Ts'o if ((want_set && 20835a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 20845a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 20855a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 20865a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 20875a916be1STheodore Ts'o } 20885a916be1STheodore Ts'o 208908cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 20905a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 209108cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 209208cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 209308cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 20945a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 209508cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 209608cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 209766acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 20985a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 20995a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 21002adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 21015a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 21022adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 21035a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 210466acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 21055a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 210666acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 21075a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 210866acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 21095a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 2110357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 21115a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 211266acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 21135a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 211468afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 211568afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 21162adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 21175a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 21182adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 21195a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 21202adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 21215a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 21225a916be1STheodore Ts'o } 212366acdcf4STheodore Ts'o if (nodefs || 212466acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 21255a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 21262adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 21272adf6da8STheodore Ts'o 2128ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 212966acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 21305a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2131df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2132df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 21337915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 21347915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 21352adf6da8STheodore Ts'o 21362adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 21372adf6da8STheodore Ts'o return 0; 21382adf6da8STheodore Ts'o } 21392adf6da8STheodore Ts'o 214066acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 214166acdcf4STheodore Ts'o { 214266acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 214366acdcf4STheodore Ts'o } 214466acdcf4STheodore Ts'o 2145ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 214666acdcf4STheodore Ts'o { 214766acdcf4STheodore Ts'o struct super_block *sb = seq->private; 214866acdcf4STheodore Ts'o int rc; 214966acdcf4STheodore Ts'o 2150bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 215166acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 215266acdcf4STheodore Ts'o seq_puts(seq, "\n"); 215366acdcf4STheodore Ts'o return rc; 215466acdcf4STheodore Ts'o } 215566acdcf4STheodore Ts'o 2156617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 2157ac27a0ecSDave Kleikamp int read_only) 2158ac27a0ecSDave Kleikamp { 2159617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2160c89128a0SJaegeuk Kim int err = 0; 2161ac27a0ecSDave Kleikamp 2162617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 2163b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 2164b31e1552SEric Sandeen "forcing read-only mode"); 2165c89128a0SJaegeuk Kim err = -EROFS; 2166ac27a0ecSDave Kleikamp } 2167ac27a0ecSDave Kleikamp if (read_only) 2168281b5995STheodore Ts'o goto done; 2169617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 2170b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 2171b31e1552SEric Sandeen "running e2fsck is recommended"); 2172c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 2173b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2174b31e1552SEric Sandeen "warning: mounting fs with errors, " 2175b31e1552SEric Sandeen "running e2fsck is recommended"); 2176ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 2177ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 2178ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 2179b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2180b31e1552SEric Sandeen "warning: maximal mount count reached, " 2181b31e1552SEric Sandeen "running e2fsck is recommended"); 2182ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 2183ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 2184ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 2185b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2186b31e1552SEric Sandeen "warning: checktime reached, " 2187b31e1552SEric Sandeen "running e2fsck is recommended"); 21880390131bSFrank Mayhar if (!sbi->s_journal) 2189216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 2190ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 2191617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 2192e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 2193ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 2194617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 21950390131bSFrank Mayhar if (sbi->s_journal) 2196e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 2197ac27a0ecSDave Kleikamp 2198c89128a0SJaegeuk Kim err = ext4_commit_super(sb, 1); 2199281b5995STheodore Ts'o done: 2200ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2201a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2202a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2203ac27a0ecSDave Kleikamp sb->s_blocksize, 2204ac27a0ecSDave Kleikamp sbi->s_groups_count, 2205617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2206617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2207a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2208ac27a0ecSDave Kleikamp 22097abc52c2SDan Magenheimer cleancache_init_fs(sb); 2210c89128a0SJaegeuk Kim return err; 2211ac27a0ecSDave Kleikamp } 2212ac27a0ecSDave Kleikamp 2213117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 2214117fff10STheodore Ts'o { 2215117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 2216117fff10STheodore Ts'o struct flex_groups *new_groups; 2217117fff10STheodore Ts'o int size; 2218117fff10STheodore Ts'o 2219117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 2220117fff10STheodore Ts'o return 0; 2221117fff10STheodore Ts'o 2222117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 2223117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 2224117fff10STheodore Ts'o return 0; 2225117fff10STheodore Ts'o 2226117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 2227a7c3e901SMichal Hocko new_groups = kvzalloc(size, GFP_KERNEL); 2228117fff10STheodore Ts'o if (!new_groups) { 2229117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 2230117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 2231117fff10STheodore Ts'o return -ENOMEM; 2232117fff10STheodore Ts'o } 2233117fff10STheodore Ts'o 2234117fff10STheodore Ts'o if (sbi->s_flex_groups) { 2235117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 2236117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 2237117fff10STheodore Ts'o sizeof(struct flex_groups))); 2238b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 2239117fff10STheodore Ts'o } 2240117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 2241117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 2242117fff10STheodore Ts'o return 0; 2243117fff10STheodore Ts'o } 2244117fff10STheodore Ts'o 2245772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2246772cb7c8SJose R. Santos { 2247772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2248772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 2249772cb7c8SJose R. Santos ext4_group_t flex_group; 2250117fff10STheodore Ts'o int i, err; 2251772cb7c8SJose R. Santos 2252503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2253d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2254772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2255772cb7c8SJose R. Santos return 1; 2256772cb7c8SJose R. Santos } 2257772cb7c8SJose R. Santos 2258117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2259117fff10STheodore Ts'o if (err) 2260772cb7c8SJose R. Santos goto failed; 2261772cb7c8SJose R. Santos 2262772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 226388b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2264772cb7c8SJose R. Santos 2265772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 22667ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 22677ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 226890ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 226924aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 22707ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 22717ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2272772cb7c8SJose R. Santos } 2273772cb7c8SJose R. Santos 2274772cb7c8SJose R. Santos return 1; 2275772cb7c8SJose R. Santos failed: 2276772cb7c8SJose R. Santos return 0; 2277772cb7c8SJose R. Santos } 2278772cb7c8SJose R. Santos 2279e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2280717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2281717d50e4SAndreas Dilger { 2282b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 2283717d50e4SAndreas Dilger __u16 crc = 0; 2284717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2285e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 2286717d50e4SAndreas Dilger 22879aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2288feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2289feb0ab32SDarrick J. Wong __u32 csum32; 2290b47820edSDaeho Jeong __u16 dummy_csum = 0; 2291feb0ab32SDarrick J. Wong 2292feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2293feb0ab32SDarrick J. Wong sizeof(le_group)); 2294b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 2295b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 2296b47820edSDaeho Jeong sizeof(dummy_csum)); 2297b47820edSDaeho Jeong offset += sizeof(dummy_csum); 2298b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 2299b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 2300b47820edSDaeho Jeong sbi->s_desc_size - offset); 2301feb0ab32SDarrick J. Wong 2302feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2303feb0ab32SDarrick J. Wong goto out; 2304feb0ab32SDarrick J. Wong } 2305feb0ab32SDarrick J. Wong 2306feb0ab32SDarrick J. Wong /* old crc16 code */ 2307e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 2308813d32f9SDarrick J. Wong return 0; 2309813d32f9SDarrick J. Wong 2310717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2311717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2312717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2313717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2314717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2315e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 2316717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2317717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2318717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2319717d50e4SAndreas Dilger offset); 2320717d50e4SAndreas Dilger 2321feb0ab32SDarrick J. Wong out: 2322717d50e4SAndreas Dilger return cpu_to_le16(crc); 2323717d50e4SAndreas Dilger } 2324717d50e4SAndreas Dilger 2325feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2326717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2327717d50e4SAndreas Dilger { 2328feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2329e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 2330717d50e4SAndreas Dilger return 0; 2331717d50e4SAndreas Dilger 2332717d50e4SAndreas Dilger return 1; 2333717d50e4SAndreas Dilger } 2334717d50e4SAndreas Dilger 2335feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2336feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2337feb0ab32SDarrick J. Wong { 2338feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2339feb0ab32SDarrick J. Wong return; 2340e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 2341feb0ab32SDarrick J. Wong } 2342feb0ab32SDarrick J. Wong 2343ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2344bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2345829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 2346bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2347ac27a0ecSDave Kleikamp { 2348617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2349617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2350617ba13bSMingming Cao ext4_fsblk_t last_block; 235177260807STheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0) + 1; 2352bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2353bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2354bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2355ce421581SJose R. Santos int flexbg_flag = 0; 2356bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2357ac27a0ecSDave Kleikamp 2358e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 2359ce421581SJose R. Santos flexbg_flag = 1; 2360ce421581SJose R. Santos 2361617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2362ac27a0ecSDave Kleikamp 2363197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2364197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2365197cd65aSAkinobu Mita 2366ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2367bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2368ac27a0ecSDave Kleikamp else 2369ac27a0ecSDave Kleikamp last_block = first_block + 2370617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2371ac27a0ecSDave Kleikamp 2372bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2373bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2374bfff6873SLukas Czerner grp = i; 2375bfff6873SLukas Czerner 23768fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 2377829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 2378829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2379829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 2380829fa70dSTheodore Ts'o "superblock", i); 238118db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 238218db4b4eSTheodore Ts'o return 0; 2383829fa70dSTheodore Ts'o } 238477260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 238577260807STheodore Ts'o block_bitmap <= last_bg_block) { 238677260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 238777260807STheodore Ts'o "Block bitmap for group %u overlaps " 238877260807STheodore Ts'o "block group descriptors", i); 238977260807STheodore Ts'o if (!sb_rdonly(sb)) 239077260807STheodore Ts'o return 0; 239177260807STheodore Ts'o } 23922b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2393b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2394a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2395b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2396ac27a0ecSDave Kleikamp return 0; 2397ac27a0ecSDave Kleikamp } 23988fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 2399829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 2400829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2401829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 2402829fa70dSTheodore Ts'o "superblock", i); 240318db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 240418db4b4eSTheodore Ts'o return 0; 2405829fa70dSTheodore Ts'o } 240677260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 240777260807STheodore Ts'o inode_bitmap <= last_bg_block) { 240877260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 240977260807STheodore Ts'o "Inode bitmap for group %u overlaps " 241077260807STheodore Ts'o "block group descriptors", i); 241177260807STheodore Ts'o if (!sb_rdonly(sb)) 241277260807STheodore Ts'o return 0; 241377260807STheodore Ts'o } 24142b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2415b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2416a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2417b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2418ac27a0ecSDave Kleikamp return 0; 2419ac27a0ecSDave Kleikamp } 24208fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2421829fa70dSTheodore Ts'o if (inode_table == sb_block) { 2422829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2423829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 2424829fa70dSTheodore Ts'o "superblock", i); 242518db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 242618db4b4eSTheodore Ts'o return 0; 2427829fa70dSTheodore Ts'o } 242877260807STheodore Ts'o if (inode_table >= sb_block + 1 && 242977260807STheodore Ts'o inode_table <= last_bg_block) { 243077260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 243177260807STheodore Ts'o "Inode table for group %u overlaps " 243277260807STheodore Ts'o "block group descriptors", i); 243377260807STheodore Ts'o if (!sb_rdonly(sb)) 243477260807STheodore Ts'o return 0; 243577260807STheodore Ts'o } 2436bd81d8eeSLaurent Vivier if (inode_table < first_block || 24372b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2438b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2439a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2440b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2441ac27a0ecSDave Kleikamp return 0; 2442ac27a0ecSDave Kleikamp } 2443955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2444feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2445b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2446b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2447e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 2448fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 2449bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 2450955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2451717d50e4SAndreas Dilger return 0; 2452717d50e4SAndreas Dilger } 24537ee1ec4cSLi Zefan } 2454955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2455ce421581SJose R. Santos if (!flexbg_flag) 2456617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2457ac27a0ecSDave Kleikamp } 2458bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2459bfff6873SLukas Czerner *first_not_zeroed = grp; 2460ac27a0ecSDave Kleikamp return 1; 2461ac27a0ecSDave Kleikamp } 2462ac27a0ecSDave Kleikamp 2463617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2464ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2465ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2466ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2467ac27a0ecSDave Kleikamp * 2468ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2469ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2470ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2471ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2472ac27a0ecSDave Kleikamp * 2473ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2474ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2475ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2476617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2477ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2478ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2479ac27a0ecSDave Kleikamp */ 2480617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2481617ba13bSMingming Cao struct ext4_super_block *es) 2482ac27a0ecSDave Kleikamp { 2483ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 24842c98eb5eSTheodore Ts'o int ret, nr_orphans = 0, nr_truncates = 0; 2485ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 248695f1fda4Szhangyi (F) int quota_update = 0; 2487ac27a0ecSDave Kleikamp int i; 2488ac27a0ecSDave Kleikamp #endif 2489ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2490ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2491ac27a0ecSDave Kleikamp return; 2492ac27a0ecSDave Kleikamp } 2493ac27a0ecSDave Kleikamp 2494a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2495b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2496b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2497a8f48a95SEric Sandeen return; 2498a8f48a95SEric Sandeen } 2499a8f48a95SEric Sandeen 2500d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2501d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2502d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2503d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2504d39195c3SAmir Goldstein return; 2505d39195c3SAmir Goldstein } 2506d39195c3SAmir Goldstein 2507617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2508c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 25091751e8a6SLinus Torvalds if (es->s_last_orphan && !(s_flags & SB_RDONLY)) { 251084474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2511ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2512ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2513c25f9bc6SEric Sandeen } 2514ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2515ac27a0ecSDave Kleikamp return; 2516ac27a0ecSDave Kleikamp } 2517ac27a0ecSDave Kleikamp 25181751e8a6SLinus Torvalds if (s_flags & SB_RDONLY) { 2519b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 25201751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 2521ac27a0ecSDave Kleikamp } 2522ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2523ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 25241751e8a6SLinus Torvalds sb->s_flags |= SB_ACTIVE; 252595f1fda4Szhangyi (F) 252695f1fda4Szhangyi (F) /* 252795f1fda4Szhangyi (F) * Turn on quotas which were not enabled for read-only mounts if 252895f1fda4Szhangyi (F) * filesystem has quota feature, so that they are updated correctly. 252995f1fda4Szhangyi (F) */ 25301751e8a6SLinus Torvalds if (ext4_has_feature_quota(sb) && (s_flags & SB_RDONLY)) { 253195f1fda4Szhangyi (F) int ret = ext4_enable_quotas(sb); 253295f1fda4Szhangyi (F) 253395f1fda4Szhangyi (F) if (!ret) 253495f1fda4Szhangyi (F) quota_update = 1; 253595f1fda4Szhangyi (F) else 253695f1fda4Szhangyi (F) ext4_msg(sb, KERN_ERR, 253795f1fda4Szhangyi (F) "Cannot turn on quotas: error %d", ret); 253895f1fda4Szhangyi (F) } 253995f1fda4Szhangyi (F) 254095f1fda4Szhangyi (F) /* Turn on journaled quotas used for old sytle */ 2541a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2542617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2543617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 254495f1fda4Szhangyi (F) 254595f1fda4Szhangyi (F) if (!ret) 254695f1fda4Szhangyi (F) quota_update = 1; 254795f1fda4Szhangyi (F) else 2548b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2549b31e1552SEric Sandeen "Cannot turn on journaled " 255095f1fda4Szhangyi (F) "quota: type %d: error %d", i, ret); 2551ac27a0ecSDave Kleikamp } 2552ac27a0ecSDave Kleikamp } 2553ac27a0ecSDave Kleikamp #endif 2554ac27a0ecSDave Kleikamp 2555ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2556ac27a0ecSDave Kleikamp struct inode *inode; 2557ac27a0ecSDave Kleikamp 2558c65d5c6cSVegard Nossum /* 2559c65d5c6cSVegard Nossum * We may have encountered an error during cleanup; if 2560c65d5c6cSVegard Nossum * so, skip the rest. 2561c65d5c6cSVegard Nossum */ 2562c65d5c6cSVegard Nossum if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2563c65d5c6cSVegard Nossum jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2564c65d5c6cSVegard Nossum es->s_last_orphan = 0; 2565c65d5c6cSVegard Nossum break; 2566c65d5c6cSVegard Nossum } 2567c65d5c6cSVegard Nossum 256897bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 256997bd42b9SJosef Bacik if (IS_ERR(inode)) { 2570ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2571ac27a0ecSDave Kleikamp break; 2572ac27a0ecSDave Kleikamp } 2573ac27a0ecSDave Kleikamp 2574617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2575871a2931SChristoph Hellwig dquot_initialize(inode); 2576ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2577566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2578b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2579b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 258046e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2581e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2582ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 25835955102cSAl Viro inode_lock(inode); 258455f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 25852c98eb5eSTheodore Ts'o ret = ext4_truncate(inode); 25862c98eb5eSTheodore Ts'o if (ret) 25872c98eb5eSTheodore Ts'o ext4_std_error(inode->i_sb, ret); 25885955102cSAl Viro inode_unlock(inode); 2589ac27a0ecSDave Kleikamp nr_truncates++; 2590ac27a0ecSDave Kleikamp } else { 2591566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2592b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2593b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 259446e665e9SHarvey Harrison __func__, inode->i_ino); 2595ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2596ac27a0ecSDave Kleikamp inode->i_ino); 2597ac27a0ecSDave Kleikamp nr_orphans++; 2598ac27a0ecSDave Kleikamp } 2599ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2600ac27a0ecSDave Kleikamp } 2601ac27a0ecSDave Kleikamp 2602ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2603ac27a0ecSDave Kleikamp 2604ac27a0ecSDave Kleikamp if (nr_orphans) 2605b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2606b31e1552SEric Sandeen PLURAL(nr_orphans)); 2607ac27a0ecSDave Kleikamp if (nr_truncates) 2608b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2609b31e1552SEric Sandeen PLURAL(nr_truncates)); 2610ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 261195f1fda4Szhangyi (F) /* Turn off quotas if they were enabled for orphan cleanup */ 261295f1fda4Szhangyi (F) if (quota_update) { 2613a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 261495f1fda4Szhangyi (F) if (sb_dqopt(sb)->files[i]) 2615287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2616ac27a0ecSDave Kleikamp } 261795f1fda4Szhangyi (F) } 2618ac27a0ecSDave Kleikamp #endif 26191751e8a6SLinus Torvalds sb->s_flags = s_flags; /* Restore SB_RDONLY status */ 2620ac27a0ecSDave Kleikamp } 26210b8e58a1SAndreas Dilger 2622cd2291a4SEric Sandeen /* 2623cd2291a4SEric Sandeen * Maximal extent format file size. 2624cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2625cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2626cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2627cd2291a4SEric Sandeen * so that won't be a limiting factor. 2628cd2291a4SEric Sandeen * 2629f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2630f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2631f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2632f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2633f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2634f17722f9SLukas Czerner * 2635cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2636cd2291a4SEric Sandeen */ 2637f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2638cd2291a4SEric Sandeen { 2639cd2291a4SEric Sandeen loff_t res; 2640cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2641cd2291a4SEric Sandeen 2642cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2643f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2644cd2291a4SEric Sandeen /* 264590c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2646cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2647cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2648cd2291a4SEric Sandeen */ 2649cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2650cd2291a4SEric Sandeen 2651cd2291a4SEric Sandeen /* total blocks in file system block size */ 2652cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2653cd2291a4SEric Sandeen upper_limit <<= blkbits; 2654cd2291a4SEric Sandeen } 2655cd2291a4SEric Sandeen 2656f17722f9SLukas Czerner /* 2657f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2658f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2659f17722f9SLukas Czerner * size 2660f17722f9SLukas Czerner */ 2661f17722f9SLukas Czerner res = (1LL << 32) - 1; 2662cd2291a4SEric Sandeen res <<= blkbits; 2663cd2291a4SEric Sandeen 2664cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2665cd2291a4SEric Sandeen if (res > upper_limit) 2666cd2291a4SEric Sandeen res = upper_limit; 2667cd2291a4SEric Sandeen 2668cd2291a4SEric Sandeen return res; 2669cd2291a4SEric Sandeen } 2670ac27a0ecSDave Kleikamp 2671ac27a0ecSDave Kleikamp /* 2672cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 26730fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 26740fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2675ac27a0ecSDave Kleikamp */ 2676f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2677ac27a0ecSDave Kleikamp { 2678617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 26790fc1b451SAneesh Kumar K.V int meta_blocks; 26800fc1b451SAneesh Kumar K.V loff_t upper_limit; 26810b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 26820b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 26830b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 26840b8e58a1SAndreas Dilger * 26850b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 26860b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 26870fc1b451SAneesh Kumar K.V */ 26880fc1b451SAneesh Kumar K.V 2689f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 26900fc1b451SAneesh Kumar K.V /* 269190c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 26920b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 26930b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 26940fc1b451SAneesh Kumar K.V */ 26950fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 26960fc1b451SAneesh Kumar K.V 26970fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 26980fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 26990fc1b451SAneesh Kumar K.V 27000fc1b451SAneesh Kumar K.V } else { 27018180a562SAneesh Kumar K.V /* 27028180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 27038180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 27048180a562SAneesh Kumar K.V * represent total number of blocks in 27058180a562SAneesh Kumar K.V * file system block size 27068180a562SAneesh Kumar K.V */ 27070fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 27080fc1b451SAneesh Kumar K.V 27090fc1b451SAneesh Kumar K.V } 27100fc1b451SAneesh Kumar K.V 27110fc1b451SAneesh Kumar K.V /* indirect blocks */ 27120fc1b451SAneesh Kumar K.V meta_blocks = 1; 27130fc1b451SAneesh Kumar K.V /* double indirect blocks */ 27140fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 27150fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 27160fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 27170fc1b451SAneesh Kumar K.V 27180fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 27190fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2720ac27a0ecSDave Kleikamp 2721ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2722ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2723ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2724ac27a0ecSDave Kleikamp res <<= bits; 2725ac27a0ecSDave Kleikamp if (res > upper_limit) 2726ac27a0ecSDave Kleikamp res = upper_limit; 27270fc1b451SAneesh Kumar K.V 27280fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 27290fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 27300fc1b451SAneesh Kumar K.V 2731ac27a0ecSDave Kleikamp return res; 2732ac27a0ecSDave Kleikamp } 2733ac27a0ecSDave Kleikamp 2734617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 273570bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2736ac27a0ecSDave Kleikamp { 2737617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2738fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2739ac27a0ecSDave Kleikamp int has_super = 0; 2740ac27a0ecSDave Kleikamp 2741ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2742ac27a0ecSDave Kleikamp 2743e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 274470bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2745ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2746617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2747ac27a0ecSDave Kleikamp has_super = 1; 27480b8e58a1SAndreas Dilger 2749bd63f6b0SDarrick J. Wong /* 2750bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2751bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2752bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2753bd63f6b0SDarrick J. Wong * compensate. 2754bd63f6b0SDarrick J. Wong */ 2755bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 275649598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 2757bd63f6b0SDarrick J. Wong has_super++; 2758bd63f6b0SDarrick J. Wong 2759617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2760ac27a0ecSDave Kleikamp } 2761ac27a0ecSDave Kleikamp 2762c9de560dSAlex Tomas /** 2763c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2764c9de560dSAlex Tomas * @sbi: In memory super block info 2765c9de560dSAlex Tomas * 2766c9de560dSAlex Tomas * If we have specified it via mount option, then 2767c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2768c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2769c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2770c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2771c9de560dSAlex Tomas * 2772c9de560dSAlex Tomas */ 2773c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2774c9de560dSAlex Tomas { 2775c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2776c9de560dSAlex Tomas unsigned long stripe_width = 2777c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 27783eb08658SDan Ehrenberg int ret; 2779c9de560dSAlex Tomas 2780c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 27813eb08658SDan Ehrenberg ret = sbi->s_stripe; 27825469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 27833eb08658SDan Ehrenberg ret = stripe_width; 27845469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 27853eb08658SDan Ehrenberg ret = stride; 27863eb08658SDan Ehrenberg else 27873eb08658SDan Ehrenberg ret = 0; 2788c9de560dSAlex Tomas 27893eb08658SDan Ehrenberg /* 27903eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 27913eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 27923eb08658SDan Ehrenberg */ 27933eb08658SDan Ehrenberg if (ret <= 1) 27943eb08658SDan Ehrenberg ret = 0; 2795c9de560dSAlex Tomas 27963eb08658SDan Ehrenberg return ret; 2797c9de560dSAlex Tomas } 2798ac27a0ecSDave Kleikamp 2799a13fb1a4SEric Sandeen /* 2800a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2801a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2802a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2803a13fb1a4SEric Sandeen * 0 if it cannot be. 2804a13fb1a4SEric Sandeen */ 2805a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2806a13fb1a4SEric Sandeen { 2807e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 2808a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2809a13fb1a4SEric Sandeen "Couldn't mount because of " 2810a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2811a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2812a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2813a13fb1a4SEric Sandeen return 0; 2814a13fb1a4SEric Sandeen } 2815a13fb1a4SEric Sandeen 2816a13fb1a4SEric Sandeen if (readonly) 2817a13fb1a4SEric Sandeen return 1; 2818a13fb1a4SEric Sandeen 2819e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 28202cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 28211751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 28222cb5cc8bSDarrick J. Wong return 1; 28232cb5cc8bSDarrick J. Wong } 28242cb5cc8bSDarrick J. Wong 2825a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2826e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 2827a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2828a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2829a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2830a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2831a13fb1a4SEric Sandeen return 0; 2832a13fb1a4SEric Sandeen } 2833a13fb1a4SEric Sandeen /* 2834a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2835a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2836a13fb1a4SEric Sandeen */ 2837e2b911c5SDarrick J. Wong if (ext4_has_feature_huge_file(sb)) { 2838a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2839a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2840a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2841a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2842a13fb1a4SEric Sandeen return 0; 2843a13fb1a4SEric Sandeen } 2844a13fb1a4SEric Sandeen } 2845e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 2846bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2847bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2848bab08ab9STheodore Ts'o "extents feature\n"); 2849bab08ab9STheodore Ts'o return 0; 2850bab08ab9STheodore Ts'o } 28517c319d32SAditya Kali 28527c319d32SAditya Kali #ifndef CONFIG_QUOTA 2853e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !readonly) { 28547c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 28557c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 28567c319d32SAditya Kali "without CONFIG_QUOTA"); 28577c319d32SAditya Kali return 0; 28587c319d32SAditya Kali } 2859689c958cSLi Xi if (ext4_has_feature_project(sb) && !readonly) { 2860689c958cSLi Xi ext4_msg(sb, KERN_ERR, 2861689c958cSLi Xi "Filesystem with project quota feature cannot be mounted RDWR " 2862689c958cSLi Xi "without CONFIG_QUOTA"); 2863689c958cSLi Xi return 0; 2864689c958cSLi Xi } 28657c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2866a13fb1a4SEric Sandeen return 1; 2867a13fb1a4SEric Sandeen } 2868a13fb1a4SEric Sandeen 286966e61a9eSTheodore Ts'o /* 287066e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 287166e61a9eSTheodore Ts'o * on the file system 287266e61a9eSTheodore Ts'o */ 2873235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 287466e61a9eSTheodore Ts'o { 2875235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 2876235699a8SKees Cook struct super_block *sb = sbi->s_sb; 2877235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 287866e61a9eSTheodore Ts'o 287966e61a9eSTheodore Ts'o if (es->s_error_count) 2880ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2881ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 288266e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 288366e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2884ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 288566e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 288666e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 288766e61a9eSTheodore Ts'o es->s_first_error_func, 288866e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 288966e61a9eSTheodore Ts'o if (es->s_first_error_ino) 2890651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 289166e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 289266e61a9eSTheodore Ts'o if (es->s_first_error_block) 2893651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 289466e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 2895651e1c3bSJoe Perches printk(KERN_CONT "\n"); 289666e61a9eSTheodore Ts'o } 289766e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2898ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 289966e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 290066e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 290166e61a9eSTheodore Ts'o es->s_last_error_func, 290266e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 290366e61a9eSTheodore Ts'o if (es->s_last_error_ino) 2904651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 290566e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 290666e61a9eSTheodore Ts'o if (es->s_last_error_block) 2907651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 290866e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 2909651e1c3bSJoe Perches printk(KERN_CONT "\n"); 291066e61a9eSTheodore Ts'o } 291166e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 291266e61a9eSTheodore Ts'o } 291366e61a9eSTheodore Ts'o 2914bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2915bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2916bfff6873SLukas Czerner { 2917bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2918bfff6873SLukas Czerner ext4_group_t group, ngroups; 2919bfff6873SLukas Czerner struct super_block *sb; 2920bfff6873SLukas Czerner unsigned long timeout = 0; 2921bfff6873SLukas Czerner int ret = 0; 2922bfff6873SLukas Czerner 2923bfff6873SLukas Czerner sb = elr->lr_super; 2924bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2925bfff6873SLukas Czerner 2926bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2927bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2928bfff6873SLukas Czerner if (!gdp) { 2929bfff6873SLukas Czerner ret = 1; 2930bfff6873SLukas Czerner break; 2931bfff6873SLukas Czerner } 2932bfff6873SLukas Czerner 2933bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2934bfff6873SLukas Czerner break; 2935bfff6873SLukas Czerner } 2936bfff6873SLukas Czerner 29377f511862STheodore Ts'o if (group >= ngroups) 2938bfff6873SLukas Czerner ret = 1; 2939bfff6873SLukas Czerner 2940bfff6873SLukas Czerner if (!ret) { 2941bfff6873SLukas Czerner timeout = jiffies; 2942bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2943bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2944bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 294551ce6511SLukas Czerner timeout = (jiffies - timeout) * 294651ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2947bfff6873SLukas Czerner elr->lr_timeout = timeout; 2948bfff6873SLukas Czerner } 2949bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2950bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2951bfff6873SLukas Czerner } 2952bfff6873SLukas Czerner return ret; 2953bfff6873SLukas Czerner } 2954bfff6873SLukas Czerner 2955bfff6873SLukas Czerner /* 2956bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 29574ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2958bfff6873SLukas Czerner */ 2959bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2960bfff6873SLukas Czerner { 2961bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2962bfff6873SLukas Czerner 2963bfff6873SLukas Czerner if (!elr) 2964bfff6873SLukas Czerner return; 2965bfff6873SLukas Czerner 2966bfff6873SLukas Czerner sbi = elr->lr_sbi; 2967bfff6873SLukas Czerner 2968bfff6873SLukas Czerner list_del(&elr->lr_request); 2969bfff6873SLukas Czerner sbi->s_li_request = NULL; 2970bfff6873SLukas Czerner kfree(elr); 2971bfff6873SLukas Czerner } 2972bfff6873SLukas Czerner 2973bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2974bfff6873SLukas Czerner { 29751bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 29761bb933fbSLukas Czerner if (!ext4_li_info) { 29771bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2978bfff6873SLukas Czerner return; 29791bb933fbSLukas Czerner } 2980bfff6873SLukas Czerner 2981bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 29821bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2983bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 29841bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2985bfff6873SLukas Czerner } 2986bfff6873SLukas Czerner 29878f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 29888f1f7453SEric Sandeen 2989bfff6873SLukas Czerner /* 2990bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2991bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2992bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2993bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2994bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2995bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2996bfff6873SLukas Czerner * next waking time and put itself into sleep. 2997bfff6873SLukas Czerner */ 2998bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2999bfff6873SLukas Czerner { 3000bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 3001bfff6873SLukas Czerner struct list_head *pos, *n; 3002bfff6873SLukas Czerner struct ext4_li_request *elr; 30034ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3004bfff6873SLukas Czerner 3005bfff6873SLukas Czerner BUG_ON(NULL == eli); 3006bfff6873SLukas Czerner 3007bfff6873SLukas Czerner cont_thread: 3008bfff6873SLukas Czerner while (true) { 3009bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3010bfff6873SLukas Czerner 3011bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3012bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3013bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3014bfff6873SLukas Czerner goto exit_thread; 3015bfff6873SLukas Czerner } 3016bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3017e22834f0SDmitry Monakhov int err = 0; 3018e22834f0SDmitry Monakhov int progress = 0; 3019bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3020bfff6873SLukas Czerner lr_request); 3021bfff6873SLukas Czerner 3022e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3023e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3024e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3025e22834f0SDmitry Monakhov continue; 3026e22834f0SDmitry Monakhov } 3027e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3028e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3029e22834f0SDmitry Monakhov progress = 1; 3030e22834f0SDmitry Monakhov /* 3031e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3032e22834f0SDmitry Monakhov * be removed from the list, it is 3033e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3034e22834f0SDmitry Monakhov */ 3035e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3036e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3037e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3038e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3039e22834f0SDmitry Monakhov n = pos->next; 3040e22834f0SDmitry Monakhov } 3041e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3042e22834f0SDmitry Monakhov } 3043b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3044e22834f0SDmitry Monakhov if (err) { 3045bfff6873SLukas Czerner ext4_remove_li_request(elr); 3046bfff6873SLukas Czerner continue; 3047bfff6873SLukas Czerner } 3048e22834f0SDmitry Monakhov if (!progress) { 3049e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3050e22834f0SDmitry Monakhov (prandom_u32() 3051e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3052b2c78cd0STheodore Ts'o } 3053bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3054bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3055bfff6873SLukas Czerner } 3056bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3057bfff6873SLukas Czerner 3058a0acae0eSTejun Heo try_to_freeze(); 3059bfff6873SLukas Czerner 30604ed5c033SLukas Czerner cur = jiffies; 30614ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3062f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3063bfff6873SLukas Czerner cond_resched(); 3064bfff6873SLukas Czerner continue; 3065bfff6873SLukas Czerner } 3066bfff6873SLukas Czerner 30674ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 30684ed5c033SLukas Czerner 30698f1f7453SEric Sandeen if (kthread_should_stop()) { 30708f1f7453SEric Sandeen ext4_clear_request_list(); 30718f1f7453SEric Sandeen goto exit_thread; 30728f1f7453SEric Sandeen } 3073bfff6873SLukas Czerner } 3074bfff6873SLukas Czerner 3075bfff6873SLukas Czerner exit_thread: 3076bfff6873SLukas Czerner /* 3077bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3078bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3079bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3080bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3081bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3082bfff6873SLukas Czerner * new one. 3083bfff6873SLukas Czerner */ 3084bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3085bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3086bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3087bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3088bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3089bfff6873SLukas Czerner goto cont_thread; 3090bfff6873SLukas Czerner } 3091bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3092bfff6873SLukas Czerner kfree(ext4_li_info); 3093bfff6873SLukas Czerner ext4_li_info = NULL; 3094bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3095bfff6873SLukas Czerner 3096bfff6873SLukas Czerner return 0; 3097bfff6873SLukas Czerner } 3098bfff6873SLukas Czerner 3099bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3100bfff6873SLukas Czerner { 3101bfff6873SLukas Czerner struct list_head *pos, *n; 3102bfff6873SLukas Czerner struct ext4_li_request *elr; 3103bfff6873SLukas Czerner 3104bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3105bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3106bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3107bfff6873SLukas Czerner lr_request); 3108bfff6873SLukas Czerner ext4_remove_li_request(elr); 3109bfff6873SLukas Czerner } 3110bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3111bfff6873SLukas Czerner } 3112bfff6873SLukas Czerner 3113bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3114bfff6873SLukas Czerner { 31158f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 31168f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 31178f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 31188f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3119bfff6873SLukas Czerner ext4_clear_request_list(); 3120bfff6873SLukas Czerner kfree(ext4_li_info); 3121bfff6873SLukas Czerner ext4_li_info = NULL; 312292b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3123bfff6873SLukas Czerner "initialization thread\n", 3124bfff6873SLukas Czerner err); 3125bfff6873SLukas Czerner return err; 3126bfff6873SLukas Czerner } 3127bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3128bfff6873SLukas Czerner return 0; 3129bfff6873SLukas Czerner } 3130bfff6873SLukas Czerner 3131bfff6873SLukas Czerner /* 3132bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3133bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3134bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3135bfff6873SLukas Czerner * groups and return total number of groups. 3136bfff6873SLukas Czerner */ 3137bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3138bfff6873SLukas Czerner { 3139bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3140bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3141bfff6873SLukas Czerner 31428844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 31438844618dSTheodore Ts'o return ngroups; 31448844618dSTheodore Ts'o 3145bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3146bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3147bfff6873SLukas Czerner if (!gdp) 3148bfff6873SLukas Czerner continue; 3149bfff6873SLukas Czerner 31508844618dSTheodore Ts'o if (gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)) 31518844618dSTheodore Ts'o continue; 31528844618dSTheodore Ts'o if (group != 0) 3153bfff6873SLukas Czerner break; 31548844618dSTheodore Ts'o ext4_error(sb, "Inode table for bg 0 marked as " 31558844618dSTheodore Ts'o "needing zeroing"); 31568844618dSTheodore Ts'o if (sb_rdonly(sb)) 31578844618dSTheodore Ts'o return ngroups; 3158bfff6873SLukas Czerner } 3159bfff6873SLukas Czerner 3160bfff6873SLukas Czerner return group; 3161bfff6873SLukas Czerner } 3162bfff6873SLukas Czerner 3163bfff6873SLukas Czerner static int ext4_li_info_new(void) 3164bfff6873SLukas Czerner { 3165bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3166bfff6873SLukas Czerner 3167bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3168bfff6873SLukas Czerner if (!eli) 3169bfff6873SLukas Czerner return -ENOMEM; 3170bfff6873SLukas Czerner 3171bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3172bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3173bfff6873SLukas Czerner 3174bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3175bfff6873SLukas Czerner 3176bfff6873SLukas Czerner ext4_li_info = eli; 3177bfff6873SLukas Czerner 3178bfff6873SLukas Czerner return 0; 3179bfff6873SLukas Czerner } 3180bfff6873SLukas Czerner 3181bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3182bfff6873SLukas Czerner ext4_group_t start) 3183bfff6873SLukas Czerner { 3184bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3185bfff6873SLukas Czerner struct ext4_li_request *elr; 3186bfff6873SLukas Czerner 3187bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3188bfff6873SLukas Czerner if (!elr) 3189bfff6873SLukas Czerner return NULL; 3190bfff6873SLukas Czerner 3191bfff6873SLukas Czerner elr->lr_super = sb; 3192bfff6873SLukas Czerner elr->lr_sbi = sbi; 3193bfff6873SLukas Czerner elr->lr_next_group = start; 3194bfff6873SLukas Czerner 3195bfff6873SLukas Czerner /* 3196bfff6873SLukas Czerner * Randomize first schedule time of the request to 3197bfff6873SLukas Czerner * spread the inode table initialization requests 3198bfff6873SLukas Czerner * better. 3199bfff6873SLukas Czerner */ 3200dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3201dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3202bfff6873SLukas Czerner return elr; 3203bfff6873SLukas Czerner } 3204bfff6873SLukas Czerner 32057f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3206bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3207bfff6873SLukas Czerner { 3208bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 32097f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 321049598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 32116c5a6cb9SAndrew Morton int ret = 0; 3212bfff6873SLukas Czerner 32137f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 321451ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 321551ce6511SLukas Czerner /* 321651ce6511SLukas Czerner * Reset timeout so it can be computed again, because 321751ce6511SLukas Czerner * s_li_wait_mult might have changed. 321851ce6511SLukas Czerner */ 321951ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 32207f511862STheodore Ts'o goto out; 322151ce6511SLukas Czerner } 3222bfff6873SLukas Czerner 3223bc98a42cSDavid Howells if (first_not_zeroed == ngroups || sb_rdonly(sb) || 322455ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 32257f511862STheodore Ts'o goto out; 3226bfff6873SLukas Czerner 3227bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 32287f511862STheodore Ts'o if (!elr) { 32297f511862STheodore Ts'o ret = -ENOMEM; 32307f511862STheodore Ts'o goto out; 32317f511862STheodore Ts'o } 3232bfff6873SLukas Czerner 3233bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3234bfff6873SLukas Czerner ret = ext4_li_info_new(); 3235bfff6873SLukas Czerner if (ret) 3236bfff6873SLukas Czerner goto out; 3237bfff6873SLukas Czerner } 3238bfff6873SLukas Czerner 3239bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3240bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3241bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3242bfff6873SLukas Czerner 3243bfff6873SLukas Czerner sbi->s_li_request = elr; 324446e4690bSTao Ma /* 324546e4690bSTao Ma * set elr to NULL here since it has been inserted to 324646e4690bSTao Ma * the request_list and the removal and free of it is 324746e4690bSTao Ma * handled by ext4_clear_request_list from now on. 324846e4690bSTao Ma */ 324946e4690bSTao Ma elr = NULL; 3250bfff6873SLukas Czerner 3251bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3252bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3253bfff6873SLukas Czerner if (ret) 3254bfff6873SLukas Czerner goto out; 3255bfff6873SLukas Czerner } 3256bfff6873SLukas Czerner out: 3257bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3258beed5ecbSNicolas Kaiser if (ret) 3259bfff6873SLukas Czerner kfree(elr); 3260bfff6873SLukas Czerner return ret; 3261bfff6873SLukas Czerner } 3262bfff6873SLukas Czerner 3263bfff6873SLukas Czerner /* 3264bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3265bfff6873SLukas Czerner * module unload. 3266bfff6873SLukas Czerner */ 3267bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3268bfff6873SLukas Czerner { 3269bfff6873SLukas Czerner /* 3270bfff6873SLukas Czerner * If thread exited earlier 3271bfff6873SLukas Czerner * there's nothing to be done. 3272bfff6873SLukas Czerner */ 32738f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3274bfff6873SLukas Czerner return; 3275bfff6873SLukas Czerner 32768f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3277bfff6873SLukas Czerner } 3278bfff6873SLukas Czerner 327925ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 328025ed6e8aSDarrick J. Wong { 328125ed6e8aSDarrick J. Wong int ret = 1; 328225ed6e8aSDarrick J. Wong int compat, incompat; 328325ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 328425ed6e8aSDarrick J. Wong 32859aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3286db9ee220SDarrick J. Wong /* journal checksum v3 */ 328725ed6e8aSDarrick J. Wong compat = 0; 3288db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 328925ed6e8aSDarrick J. Wong } else { 329025ed6e8aSDarrick J. Wong /* journal checksum v1 */ 329125ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 329225ed6e8aSDarrick J. Wong incompat = 0; 329325ed6e8aSDarrick J. Wong } 329425ed6e8aSDarrick J. Wong 3295feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3296feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3297feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3298feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 329925ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 330025ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 330125ed6e8aSDarrick J. Wong compat, 0, 330225ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 330325ed6e8aSDarrick J. Wong incompat); 330425ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 330525ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 330625ed6e8aSDarrick J. Wong compat, 0, 330725ed6e8aSDarrick J. Wong incompat); 330825ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 330925ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 331025ed6e8aSDarrick J. Wong } else { 3311feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3312feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 331325ed6e8aSDarrick J. Wong } 331425ed6e8aSDarrick J. Wong 331525ed6e8aSDarrick J. Wong return ret; 331625ed6e8aSDarrick J. Wong } 331725ed6e8aSDarrick J. Wong 3318952fc18eSTheodore Ts'o /* 3319952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3320952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3321952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3322952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3323952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3324952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3325952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3326952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3327952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3328952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3329952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3330952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3331952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3332952fc18eSTheodore Ts'o */ 3333952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3334952fc18eSTheodore Ts'o char *buf) 3335952fc18eSTheodore Ts'o { 3336952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3337952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3338952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3339952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3340952fc18eSTheodore Ts'o int s, j, count = 0; 3341952fc18eSTheodore Ts'o 3342e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 33430548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 33440548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 33450548bbb8STheodore Ts'o 3346952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3347952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3348952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3349952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3350952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3351952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3352952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3353952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3354952fc18eSTheodore Ts'o count++; 3355952fc18eSTheodore Ts'o } 3356952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3357952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3358952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3359952fc18eSTheodore Ts'o count++; 3360952fc18eSTheodore Ts'o } 3361952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3362952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3363952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3364952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3365952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3366952fc18eSTheodore Ts'o count++; 3367952fc18eSTheodore Ts'o } 3368952fc18eSTheodore Ts'o if (i != grp) 3369952fc18eSTheodore Ts'o continue; 3370952fc18eSTheodore Ts'o s = 0; 3371952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3372952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3373952fc18eSTheodore Ts'o count++; 3374952fc18eSTheodore Ts'o } 3375c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 3376c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 3377c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 3378c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 3379c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 3380952fc18eSTheodore Ts'o } 3381c48ae41bSTheodore Ts'o count += j; 3382c48ae41bSTheodore Ts'o for (; j > 0; j--) 3383c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3384952fc18eSTheodore Ts'o } 3385952fc18eSTheodore Ts'o if (!count) 3386952fc18eSTheodore Ts'o return 0; 3387952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3388952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3389952fc18eSTheodore Ts'o } 3390952fc18eSTheodore Ts'o 3391952fc18eSTheodore Ts'o /* 3392952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3393952fc18eSTheodore Ts'o */ 3394952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3395952fc18eSTheodore Ts'o { 3396952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3397952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 33983c816dedSEric Whitney struct inode *j_inode; 33993c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 3400952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3401952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 34024fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3403952fc18eSTheodore Ts'o 3404952fc18eSTheodore Ts'o if (!buf) 3405952fc18eSTheodore Ts'o return -ENOMEM; 3406952fc18eSTheodore Ts'o 3407952fc18eSTheodore Ts'o /* 3408952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3409952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3410952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3411952fc18eSTheodore Ts'o */ 3412952fc18eSTheodore Ts'o 3413952fc18eSTheodore Ts'o /* 3414952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3415952fc18eSTheodore Ts'o */ 3416952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3417952fc18eSTheodore Ts'o 3418952fc18eSTheodore Ts'o /* 3419952fc18eSTheodore Ts'o * Add the overhead found in each block group 3420952fc18eSTheodore Ts'o */ 3421952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3422952fc18eSTheodore Ts'o int blks; 3423952fc18eSTheodore Ts'o 3424952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3425952fc18eSTheodore Ts'o overhead += blks; 3426952fc18eSTheodore Ts'o if (blks) 3427952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3428952fc18eSTheodore Ts'o cond_resched(); 3429952fc18eSTheodore Ts'o } 34303c816dedSEric Whitney 34313c816dedSEric Whitney /* 34323c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 34333c816dedSEric Whitney * loaded or not 34343c816dedSEric Whitney */ 3435b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3436810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 34373c816dedSEric Whitney else if (ext4_has_feature_journal(sb) && !sbi->s_journal) { 34383c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 34393c816dedSEric Whitney if (j_inode) { 34403c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 34413c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 34423c816dedSEric Whitney iput(j_inode); 34433c816dedSEric Whitney } else { 34443c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 34453c816dedSEric Whitney } 34463c816dedSEric Whitney } 3447952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3448952fc18eSTheodore Ts'o smp_wmb(); 3449952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3450952fc18eSTheodore Ts'o return 0; 3451952fc18eSTheodore Ts'o } 3452952fc18eSTheodore Ts'o 3453b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 345427dd4385SLukas Czerner { 345527dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 3456b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 345727dd4385SLukas Czerner 345827dd4385SLukas Czerner /* 345930fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 346030fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 346130fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 346230fac0f7SJan Kara * to keep ext2/3 backward compatibility. 346330fac0f7SJan Kara */ 3464e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 3465b5799018STheodore Ts'o return; 346630fac0f7SJan Kara /* 346727dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 346827dd4385SLukas Czerner * This should cover the situations where we can not afford to run 346927dd4385SLukas Czerner * out of space like for example punch hole, or converting 3470556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 347127dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 347227dd4385SLukas Czerner * very rare. 347327dd4385SLukas Czerner */ 3474b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 3475b5799018STheodore Ts'o sbi->s_cluster_bits); 347627dd4385SLukas Czerner 347727dd4385SLukas Czerner do_div(resv_clusters, 50); 347827dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 347927dd4385SLukas Czerner 3480b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 348127dd4385SLukas Czerner } 348227dd4385SLukas Czerner 3483617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3484ac27a0ecSDave Kleikamp { 34855e405595SDan Williams struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev); 3486d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3487ac27a0ecSDave Kleikamp struct buffer_head *bh; 3488617ba13bSMingming Cao struct ext4_super_block *es = NULL; 34895aee0f8aSTheodore Ts'o struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3490617ba13bSMingming Cao ext4_fsblk_t block; 3491617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 349270bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3493ac27a0ecSDave Kleikamp unsigned long offset = 0; 3494ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3495ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3496ac27a0ecSDave Kleikamp struct inode *root; 34970390131bSFrank Mayhar const char *descr; 3498dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3499281b5995STheodore Ts'o int blocksize, clustersize; 35004ec11028STheodore Ts'o unsigned int db_count; 35014ec11028STheodore Ts'o unsigned int i; 3502281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3503bd81d8eeSLaurent Vivier __u64 blocks_count; 350407aa2ea1SLukas Czerner int err = 0; 3505b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3506bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3507ac27a0ecSDave Kleikamp 35085aee0f8aSTheodore Ts'o if ((data && !orig_data) || !sbi) 35095aee0f8aSTheodore Ts'o goto out_free_base; 3510705895b6SPekka Enberg 3511aed9eb1bSColin Ian King sbi->s_daxdev = dax_dev; 3512705895b6SPekka Enberg sbi->s_blockgroup_lock = 3513705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 35145aee0f8aSTheodore Ts'o if (!sbi->s_blockgroup_lock) 35155aee0f8aSTheodore Ts'o goto out_free_base; 35165aee0f8aSTheodore Ts'o 3517ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 35182c0544b2STheodore Ts'o sbi->s_sb = sb; 3519240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3520d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3521f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3522f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3523f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3524ac27a0ecSDave Kleikamp 35259f6200bbSTheodore Ts'o /* Cleanup superblock name */ 3526ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 35279f6200bbSTheodore Ts'o 352807aa2ea1SLukas Czerner /* -EINVAL is default */ 3529dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3530617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3531ac27a0ecSDave Kleikamp if (!blocksize) { 3532b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3533ac27a0ecSDave Kleikamp goto out_fail; 3534ac27a0ecSDave Kleikamp } 3535ac27a0ecSDave Kleikamp 3536ac27a0ecSDave Kleikamp /* 3537617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3538ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3539ac27a0ecSDave Kleikamp */ 3540617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 354170bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 354270bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3543ac27a0ecSDave Kleikamp } else { 354470bbb3e0SAndrew Morton logical_sb_block = sb_block; 3545ac27a0ecSDave Kleikamp } 3546ac27a0ecSDave Kleikamp 3547a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3548b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3549ac27a0ecSDave Kleikamp goto out_fail; 3550ac27a0ecSDave Kleikamp } 3551ac27a0ecSDave Kleikamp /* 3552ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3553617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3554ac27a0ecSDave Kleikamp */ 35552716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3556ac27a0ecSDave Kleikamp sbi->s_es = es; 3557ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3558617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3559617ba13bSMingming Cao goto cantfind_ext4; 3560afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3561ac27a0ecSDave Kleikamp 3562feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3563e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 3564e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 3565363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3566feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3567feb0ab32SDarrick J. Wong 3568d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3569d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3570d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3571d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3572d25425f8SDarrick J. Wong silent = 1; 3573d25425f8SDarrick J. Wong goto cantfind_ext4; 3574d25425f8SDarrick J. Wong } 3575d25425f8SDarrick J. Wong 35760441984aSDarrick J. Wong /* Load the checksum driver */ 35770441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 35780441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 35790441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 35800441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 35810441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 35820441984aSDarrick J. Wong goto failed_mount; 35830441984aSDarrick J. Wong } 35840441984aSDarrick J. Wong 3585a9c47317SDarrick J. Wong /* Check superblock checksum */ 3586a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3587a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3588a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3589a9c47317SDarrick J. Wong silent = 1; 35906a797d27SDarrick J. Wong ret = -EFSBADCRC; 3591a9c47317SDarrick J. Wong goto cantfind_ext4; 3592a9c47317SDarrick J. Wong } 3593a9c47317SDarrick J. Wong 3594a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3595e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 35968c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 3597dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 3598a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3599a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3600a9c47317SDarrick J. Wong 3601ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3602ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3603fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3604617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3605fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 360687f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3607fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3608617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3609fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3610ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3611fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 361203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3613fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 36142e7842b8SHugh Dickins #endif 361598c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 361698c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 361798c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 361898c1a759SDarrick J. Wong 3619617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3620fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3621617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3622fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3623617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3624fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3625ac27a0ecSDave Kleikamp 3626617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3627fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3628bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3629fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3630bb4f397aSAneesh Kumar K.V else 3631fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 363245f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3633fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 36348b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3635fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3636ac27a0ecSDave Kleikamp 363708cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 363808cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 363930773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 364030773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 364130773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3642ac27a0ecSDave Kleikamp 36438b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3644fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3645ac27a0ecSDave Kleikamp 36461e2462f9SMingming Cao /* 3647dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3648dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3649dd919b98SAneesh Kumar K.V */ 3650bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 36518b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3652fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3653dd919b98SAneesh Kumar K.V 365451ce6511SLukas Czerner /* 365551ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 365651ce6511SLukas Czerner * no mount option specified. 365751ce6511SLukas Czerner */ 365851ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 365951ce6511SLukas Czerner 36605aee0f8aSTheodore Ts'o if (sbi->s_es->s_mount_opts[0]) { 36615aee0f8aSTheodore Ts'o char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 36625aee0f8aSTheodore Ts'o sizeof(sbi->s_es->s_mount_opts), 36635aee0f8aSTheodore Ts'o GFP_KERNEL); 36645aee0f8aSTheodore Ts'o if (!s_mount_opts) 36655aee0f8aSTheodore Ts'o goto failed_mount; 36665aee0f8aSTheodore Ts'o if (!parse_options(s_mount_opts, sb, &journal_devnum, 36675aee0f8aSTheodore Ts'o &journal_ioprio, 0)) { 36688b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 36698b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 36705aee0f8aSTheodore Ts'o s_mount_opts); 36715aee0f8aSTheodore Ts'o } 36725aee0f8aSTheodore Ts'o kfree(s_mount_opts); 36738b67f04aSTheodore Ts'o } 36745a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3675b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3676661aa520SEric Sandeen &journal_ioprio, 0)) 3677ac27a0ecSDave Kleikamp goto failed_mount; 3678ac27a0ecSDave Kleikamp 367956889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 368056889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 368156889787STheodore Ts'o "with data=journal disables delayed " 368256889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 368356889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 368456889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 368556889787STheodore Ts'o "both data=journal and delalloc"); 368656889787STheodore Ts'o goto failed_mount; 368756889787STheodore Ts'o } 368856889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 368956889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 36906ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 369156889787STheodore Ts'o goto failed_mount; 369256889787STheodore Ts'o } 3693923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 3694923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 3695923ae0ffSRoss Zwisler "both data=journal and dax"); 3696923ae0ffSRoss Zwisler goto failed_mount; 3697923ae0ffSRoss Zwisler } 369873b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 369973b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 370073b92a2aSSergey Karamov "encrypted files will use data=ordered " 370173b92a2aSSergey Karamov "instead of data journaling mode"); 370273b92a2aSSergey Karamov } 370356889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 370456889787STheodore Ts'o clear_opt(sb, DELALLOC); 3705001e4a87STejun Heo } else { 3706001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 370756889787STheodore Ts'o } 370856889787STheodore Ts'o 37091751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 37101751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 3711ac27a0ecSDave Kleikamp 3712617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3713e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 3714e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 3715e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 3716b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3717b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3718b31e1552SEric Sandeen "running e2fsck is recommended"); 3719469108ffSTheodore Tso 3720ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3721ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3722e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 3723ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3724ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3725ed3654ebSTheodore Ts'o goto failed_mount; 3726ed3654ebSTheodore Ts'o } 3727dec214d0STahsin Erdogan 3728dec214d0STahsin Erdogan /* 3729dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 3730dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 3731dec214d0STahsin Erdogan */ 3732dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 3733dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 3734dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 3735dec214d0STahsin Erdogan goto failed_mount; 3736dec214d0STahsin Erdogan } 3737ed3654ebSTheodore Ts'o } 3738ed3654ebSTheodore Ts'o 37392035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 37402035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 37412035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 37422035e776STheodore Ts'o "using the ext4 subsystem"); 37432035e776STheodore Ts'o else { 37440d9366d6SEric Sandeen /* 37450d9366d6SEric Sandeen * If we're probing be silent, if this looks like 37460d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 37470d9366d6SEric Sandeen */ 37480d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 37490d9366d6SEric Sandeen goto failed_mount; 37502035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 37512035e776STheodore Ts'o "to feature incompatibilities"); 37522035e776STheodore Ts'o goto failed_mount; 37532035e776STheodore Ts'o } 37542035e776STheodore Ts'o } 37552035e776STheodore Ts'o 37562035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 37572035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 37582035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 37592035e776STheodore Ts'o "using the ext4 subsystem"); 37602035e776STheodore Ts'o else { 37610d9366d6SEric Sandeen /* 37620d9366d6SEric Sandeen * If we're probing be silent, if this looks like 37630d9366d6SEric Sandeen * it's actually an ext4 filesystem. 37640d9366d6SEric Sandeen */ 37650d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 37660d9366d6SEric Sandeen goto failed_mount; 37672035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 37682035e776STheodore Ts'o "to feature incompatibilities"); 37692035e776STheodore Ts'o goto failed_mount; 37702035e776STheodore Ts'o } 37712035e776STheodore Ts'o } 37722035e776STheodore Ts'o 3773469108ffSTheodore Tso /* 3774ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3775ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3776ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3777ac27a0ecSDave Kleikamp */ 3778bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 3779ac27a0ecSDave Kleikamp goto failed_mount; 3780a13fb1a4SEric Sandeen 3781261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3782617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3783617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3784b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 37858cdf3372STheodore Ts'o "Unsupported filesystem blocksize %d (%d log_block_size)", 37868cdf3372STheodore Ts'o blocksize, le32_to_cpu(es->s_log_block_size)); 37878cdf3372STheodore Ts'o goto failed_mount; 37888cdf3372STheodore Ts'o } 37898cdf3372STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 37908cdf3372STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 37918cdf3372STheodore Ts'o ext4_msg(sb, KERN_ERR, 37928cdf3372STheodore Ts'o "Invalid log block size: %u", 37938cdf3372STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 3794ac27a0ecSDave Kleikamp goto failed_mount; 3795ac27a0ecSDave Kleikamp } 3796*bfe0a5f4STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 3797*bfe0a5f4STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 3798*bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 3799*bfe0a5f4STheodore Ts'o "Invalid log cluster size: %u", 3800*bfe0a5f4STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 3801*bfe0a5f4STheodore Ts'o goto failed_mount; 3802*bfe0a5f4STheodore Ts'o } 3803ac27a0ecSDave Kleikamp 38045b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 38055b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 38065b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 38075b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 38085b9554dcSTheodore Ts'o goto failed_mount; 38095b9554dcSTheodore Ts'o } 38105b9554dcSTheodore Ts'o 3811923ae0ffSRoss Zwisler if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { 3812559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 3813559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 3814559db4c6SRoss Zwisler " that may contain inline data"); 381524f3478dSDan Williams sbi->s_mount_opt &= ~EXT4_MOUNT_DAX; 3816559db4c6SRoss Zwisler } 381787eefeb4SToshi Kani err = bdev_dax_supported(sb, blocksize); 381824f3478dSDan Williams if (err) { 381924f3478dSDan Williams ext4_msg(sb, KERN_ERR, 382024f3478dSDan Williams "DAX unsupported by block device. Turning off DAX."); 382124f3478dSDan Williams sbi->s_mount_opt &= ~EXT4_MOUNT_DAX; 382224f3478dSDan Williams } 3823923ae0ffSRoss Zwisler } 3824923ae0ffSRoss Zwisler 3825e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 38266ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 38276ddb2447STheodore Ts'o es->s_encryption_level); 38286ddb2447STheodore Ts'o goto failed_mount; 38296ddb2447STheodore Ts'o } 38306ddb2447STheodore Ts'o 3831ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3832ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3833ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3834b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3835ce40733cSAneesh Kumar K.V blocksize); 3836ac27a0ecSDave Kleikamp goto failed_mount; 3837ac27a0ecSDave Kleikamp } 3838ac27a0ecSDave Kleikamp 3839ac27a0ecSDave Kleikamp brelse(bh); 384070bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 384170bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3842a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3843ac27a0ecSDave Kleikamp if (!bh) { 3844b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3845b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3846ac27a0ecSDave Kleikamp goto failed_mount; 3847ac27a0ecSDave Kleikamp } 38482716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3849ac27a0ecSDave Kleikamp sbi->s_es = es; 3850617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3851b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3852b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3853ac27a0ecSDave Kleikamp goto failed_mount; 3854ac27a0ecSDave Kleikamp } 3855ac27a0ecSDave Kleikamp } 3856ac27a0ecSDave Kleikamp 3857e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 3858f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3859f287a1a5STheodore Ts'o has_huge_files); 3860f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3861ac27a0ecSDave Kleikamp 3862617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3863617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3864617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3865ac27a0ecSDave Kleikamp } else { 3866ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3867ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3868c37e9e01STheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 3869c37e9e01STheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 3870c37e9e01STheodore Ts'o sbi->s_first_ino); 3871c37e9e01STheodore Ts'o goto failed_mount; 3872c37e9e01STheodore Ts'o } 3873617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 38741330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3875ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3876b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3877b31e1552SEric Sandeen "unsupported inode size: %d", 3878ac27a0ecSDave Kleikamp sbi->s_inode_size); 3879ac27a0ecSDave Kleikamp goto failed_mount; 3880ac27a0ecSDave Kleikamp } 3881ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3882ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3883ac27a0ecSDave Kleikamp } 38840b8e58a1SAndreas Dilger 38850d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 3886e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 38878fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 38880d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3889d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3890b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3891b31e1552SEric Sandeen "unsupported descriptor size %lu", 38920d1ee42fSAlexandre Ratchov sbi->s_desc_size); 38930d1ee42fSAlexandre Ratchov goto failed_mount; 38940d1ee42fSAlexandre Ratchov } 38950d1ee42fSAlexandre Ratchov } else 38960d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 38970b8e58a1SAndreas Dilger 3898ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3899ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 39000b8e58a1SAndreas Dilger 3901617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3902ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3903617ba13bSMingming Cao goto cantfind_ext4; 3904cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 3905cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 3906cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 3907cd6bb35bSTheodore Ts'o sbi->s_blocks_per_group); 3908cd6bb35bSTheodore Ts'o goto failed_mount; 3909cd6bb35bSTheodore Ts'o } 3910ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3911ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 39120d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3913ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3914ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3915e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3916e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 39170b8e58a1SAndreas Dilger 3918ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3919ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3920ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3921e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 3922f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3923f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3924f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3925f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3926f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3927bc98a42cSDavid Howells if (!sb_rdonly(sb)) 392823301410STheodore Ts'o es->s_flags |= 392923301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3930f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3931f99b2589STheodore Ts'o #else 3932bc98a42cSDavid Howells if (!sb_rdonly(sb)) 393323301410STheodore Ts'o es->s_flags |= 393423301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3935f99b2589STheodore Ts'o #endif 3936f99b2589STheodore Ts'o } 393723301410STheodore Ts'o } 3938ac27a0ecSDave Kleikamp 3939281b5995STheodore Ts'o /* Handle clustersize */ 3940281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3941e2b911c5SDarrick J. Wong has_bigalloc = ext4_has_feature_bigalloc(sb); 3942281b5995STheodore Ts'o if (has_bigalloc) { 3943281b5995STheodore Ts'o if (clustersize < blocksize) { 3944281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3945281b5995STheodore Ts'o "cluster size (%d) smaller than " 3946281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3947281b5995STheodore Ts'o goto failed_mount; 3948281b5995STheodore Ts'o } 3949281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3950281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3951281b5995STheodore Ts'o sbi->s_clusters_per_group = 3952281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3953281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3954281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3955281b5995STheodore Ts'o "#clusters per group too big: %lu", 3956281b5995STheodore Ts'o sbi->s_clusters_per_group); 3957281b5995STheodore Ts'o goto failed_mount; 3958281b5995STheodore Ts'o } 3959281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3960281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3961281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3962281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3963281b5995STheodore Ts'o sbi->s_blocks_per_group, 3964281b5995STheodore Ts'o sbi->s_clusters_per_group); 3965281b5995STheodore Ts'o goto failed_mount; 3966281b5995STheodore Ts'o } 3967281b5995STheodore Ts'o } else { 3968281b5995STheodore Ts'o if (clustersize != blocksize) { 3969*bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 3970*bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 3971*bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 3972*bfe0a5f4STheodore Ts'o goto failed_mount; 3973281b5995STheodore Ts'o } 3974ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3975b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3976b31e1552SEric Sandeen "#blocks per group too big: %lu", 3977ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3978ac27a0ecSDave Kleikamp goto failed_mount; 3979ac27a0ecSDave Kleikamp } 3980281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3981281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3982281b5995STheodore Ts'o } 3983281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3984281b5995STheodore Ts'o 3985960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3986960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3987960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3988960fd856STheodore Ts'o 3989bf43d84bSEric Sandeen /* 3990bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3991bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3992bf43d84bSEric Sandeen */ 39935a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 399430ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 39955a9ae68aSDarrick J. Wong if (err) { 3996b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3997bf43d84bSEric Sandeen " too large to mount safely on this system"); 3998ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 399990c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 4000ac27a0ecSDave Kleikamp goto failed_mount; 4001ac27a0ecSDave Kleikamp } 4002ac27a0ecSDave Kleikamp 4003617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 4004617ba13bSMingming Cao goto cantfind_ext4; 4005e7c95593SEric Sandeen 40060f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 40070f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 40080f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4009b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4010b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 40110f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 40120f2ddca6SFrom: Thiemo Nagel goto failed_mount; 40130f2ddca6SFrom: Thiemo Nagel } 40140f2ddca6SFrom: Thiemo Nagel 40154ec11028STheodore Ts'o /* 40164ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 40174ec11028STheodore Ts'o * of the filesystem. 40184ec11028STheodore Ts'o */ 40194ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4020b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4021b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 4022e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 40234ec11028STheodore Ts'o ext4_blocks_count(es)); 4024e7c95593SEric Sandeen goto failed_mount; 4025e7c95593SEric Sandeen } 4026*bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4027*bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 4028*bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4029*bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 4030*bfe0a5f4STheodore Ts'o goto failed_mount; 4031*bfe0a5f4STheodore Ts'o } 4032*bfe0a5f4STheodore Ts'o 4033bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 4034bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 4035bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 4036bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 40374ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4038b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 40394ec11028STheodore Ts'o "(block count %llu, first data block %u, " 4040b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 40414ec11028STheodore Ts'o ext4_blocks_count(es), 40424ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 40434ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 40444ec11028STheodore Ts'o goto failed_mount; 40454ec11028STheodore Ts'o } 4046bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 4047fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4048fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 4049617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4050617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 40513a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 40522ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 40533a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 40543a4b77cdSEryu Guan "first meta block group too large: %u " 40553a4b77cdSEryu Guan "(group descriptor block count %u)", 40563a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 40573a4b77cdSEryu Guan goto failed_mount; 40583a4b77cdSEryu Guan } 40593a4b77cdSEryu Guan } 4060a7c3e901SMichal Hocko sbi->s_group_desc = kvmalloc(db_count * 4061f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 4062ac27a0ecSDave Kleikamp GFP_KERNEL); 4063ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 4064b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 40652cde417dSTheodore Ts'o ret = -ENOMEM; 4066ac27a0ecSDave Kleikamp goto failed_mount; 4067ac27a0ecSDave Kleikamp } 4068*bfe0a5f4STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 4069*bfe0a5f4STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 4070*bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 4071*bfe0a5f4STheodore Ts'o le32_to_cpu(es->s_inodes_count), 4072*bfe0a5f4STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 4073*bfe0a5f4STheodore Ts'o ret = -EINVAL; 4074*bfe0a5f4STheodore Ts'o goto failed_mount; 4075*bfe0a5f4STheodore Ts'o } 4076ac27a0ecSDave Kleikamp 4077705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 4078ac27a0ecSDave Kleikamp 407985c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 408085c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 408185c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 408285c8f176SAndrew Perepechko sb_breadahead(sb, block); 408385c8f176SAndrew Perepechko } 408485c8f176SAndrew Perepechko 4085ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 408670bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 4087a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 4088ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 4089b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4090b31e1552SEric Sandeen "can't read group descriptor %d", i); 4091ac27a0ecSDave Kleikamp db_count = i; 4092ac27a0ecSDave Kleikamp goto failed_mount2; 4093ac27a0ecSDave Kleikamp } 4094ac27a0ecSDave Kleikamp } 4095829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 4096b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 40976a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 4098f9ae9cf5STheodore Ts'o goto failed_mount2; 4099ac27a0ecSDave Kleikamp } 4100772cb7c8SJose R. Santos 4101f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 4102ac27a0ecSDave Kleikamp 4103235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 410404496411STao Ma 4105a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 4106eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 4107ce7e010aSTheodore Ts'o goto failed_mount3; 4108ce7e010aSTheodore Ts'o 4109c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 411067a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 4111c9de560dSAlex Tomas 4112f9ae9cf5STheodore Ts'o /* 4113f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 4114f9ae9cf5STheodore Ts'o */ 4115f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 4116617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 4117617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 4118ffcc4182SEric Biggers #ifdef CONFIG_EXT4_FS_ENCRYPTION 4119a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 4120ffcc4182SEric Biggers #endif 4121ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4122617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 4123e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 41241fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 4125262b4662SJan Kara else 4126262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 4127689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 4128ac27a0ecSDave Kleikamp #endif 412985787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 4130f2fa2ffcSAneesh Kumar K.V 4131ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 41323b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 4133ac27a0ecSDave Kleikamp 4134ac27a0ecSDave Kleikamp sb->s_root = NULL; 4135ac27a0ecSDave Kleikamp 4136ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 4137e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 4138ac27a0ecSDave Kleikamp 4139bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 4140c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 414150460fe8SDarrick J. Wong goto failed_mount3a; 4142c5e06d10SJohann Lombardi 4143ac27a0ecSDave Kleikamp /* 4144ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 4145ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 4146ac27a0ecSDave Kleikamp */ 4147e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 41484753d8a2STheodore Ts'o err = ext4_load_journal(sb, es, journal_devnum); 41494753d8a2STheodore Ts'o if (err) 415050460fe8SDarrick J. Wong goto failed_mount3a; 4151bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 4152e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 4153b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 4154b31e1552SEric Sandeen "suppressed and not mounted read-only"); 4155744692dcSJiaying Zhang goto failed_mount_wq; 4156ac27a0ecSDave Kleikamp } else { 41571e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 41581e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 41591e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 41601e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 41611e381f60SDmitry Monakhov goto failed_mount_wq; 41621e381f60SDmitry Monakhov } 41631e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 41641e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 41651e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 41661e381f60SDmitry Monakhov goto failed_mount_wq; 41671e381f60SDmitry Monakhov } 41681e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 41691e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 41701e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 41711e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 41721e381f60SDmitry Monakhov goto failed_mount_wq; 41731e381f60SDmitry Monakhov } 41741e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 41751e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 41761e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 41771e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 41781e381f60SDmitry Monakhov goto failed_mount_wq; 41791e381f60SDmitry Monakhov } 41801e381f60SDmitry Monakhov sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; 41811e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 4182fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 41830390131bSFrank Mayhar sbi->s_journal = NULL; 41840390131bSFrank Mayhar needs_recovery = 0; 41850390131bSFrank Mayhar goto no_journal; 4186ac27a0ecSDave Kleikamp } 4187ac27a0ecSDave Kleikamp 4188e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 4189eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4190eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 4191b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4192744692dcSJiaying Zhang goto failed_mount_wq; 4193eb40a09cSJose R. Santos } 4194eb40a09cSJose R. Santos 419525ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 419625ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 419725ed6e8aSDarrick J. Wong "feature set"); 419825ed6e8aSDarrick J. Wong goto failed_mount_wq; 4199d4da6c9cSLinus Torvalds } 4200818d276cSGirish Shilamkar 4201ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4202ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4203ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4204ac27a0ecSDave Kleikamp case 0: 4205ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 420663f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 420763f57933SAndrew Morton * cope, else JOURNAL_DATA 420863f57933SAndrew Morton */ 4209dab291afSMingming Cao if (jbd2_journal_check_available_features 421027f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4211fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 421227f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 421327f394a7STyson Nottingham } else { 4214fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 421527f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 421627f394a7STyson Nottingham } 4217ac27a0ecSDave Kleikamp break; 4218ac27a0ecSDave Kleikamp 4219617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4220617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4221dab291afSMingming Cao if (!jbd2_journal_check_available_features 4222dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4223b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4224b31e1552SEric Sandeen "requested data journaling mode"); 4225744692dcSJiaying Zhang goto failed_mount_wq; 4226ac27a0ecSDave Kleikamp } 4227ac27a0ecSDave Kleikamp default: 4228ac27a0ecSDave Kleikamp break; 4229ac27a0ecSDave Kleikamp } 4230ab04df78SJan Kara 4231ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 4232ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 4233ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 4234ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 4235ab04df78SJan Kara goto failed_mount_wq; 4236ab04df78SJan Kara } 4237ab04df78SJan Kara 4238b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4239ac27a0ecSDave Kleikamp 424018aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 424118aadd47SBobi Jam 4242ce7e010aSTheodore Ts'o no_journal: 4243cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 424447387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 424547387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 4246cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 4247cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 42489c191f70ST Makphaibulchoke goto failed_mount_wq; 42499c191f70ST Makphaibulchoke } 42509c191f70ST Makphaibulchoke 4251dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4252dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 4253dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 4254dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4255dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 4256dec214d0STahsin Erdogan goto failed_mount_wq; 4257dec214d0STahsin Erdogan } 4258dec214d0STahsin Erdogan } 4259cdb7ee4cSTahsin Erdogan } 4260dec214d0STahsin Erdogan 4261e2b911c5SDarrick J. Wong if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && 426209cbfeafSKirill A. Shutemov (blocksize != PAGE_SIZE)) { 42631cb767cdSTheodore Ts'o ext4_msg(sb, KERN_ERR, 42641cb767cdSTheodore Ts'o "Unsupported blocksize for fs encryption"); 42651cb767cdSTheodore Ts'o goto failed_mount_wq; 42661cb767cdSTheodore Ts'o } 42671cb767cdSTheodore Ts'o 4268bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 4269e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 4270e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 42716ddb2447STheodore Ts'o ext4_commit_super(sb, 1); 42726ddb2447STheodore Ts'o } 42736ddb2447STheodore Ts'o 4274fd89d5f2STejun Heo /* 4275952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4276952fc18eSTheodore Ts'o * superblock if present. 4277952fc18eSTheodore Ts'o */ 4278952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4279952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4280952fc18eSTheodore Ts'o else { 428107aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 428207aa2ea1SLukas Czerner if (err) 4283952fc18eSTheodore Ts'o goto failed_mount_wq; 4284952fc18eSTheodore Ts'o } 4285952fc18eSTheodore Ts'o 4286952fc18eSTheodore Ts'o /* 4287fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4288fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4289fd89d5f2STejun Heo */ 42902e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 42912e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 42922e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 42932e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 429407aa2ea1SLukas Czerner ret = -ENOMEM; 42952e8fa54eSJan Kara goto failed_mount4; 42962e8fa54eSJan Kara } 42972e8fa54eSJan Kara 4298ac27a0ecSDave Kleikamp /* 4299dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4300ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4301ac27a0ecSDave Kleikamp */ 4302ac27a0ecSDave Kleikamp 43031d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 43041d1fe1eeSDavid Howells if (IS_ERR(root)) { 4305b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 43061d1fe1eeSDavid Howells ret = PTR_ERR(root); 430732a9bb57SManish Katiyar root = NULL; 4308ac27a0ecSDave Kleikamp goto failed_mount4; 4309ac27a0ecSDave Kleikamp } 4310ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4311b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 431294bf608aSAl Viro iput(root); 4313ac27a0ecSDave Kleikamp goto failed_mount4; 4314ac27a0ecSDave Kleikamp } 431548fde701SAl Viro sb->s_root = d_make_root(root); 43161d1fe1eeSDavid Howells if (!sb->s_root) { 4317b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 43181d1fe1eeSDavid Howells ret = -ENOMEM; 43191d1fe1eeSDavid Howells goto failed_mount4; 43201d1fe1eeSDavid Howells } 4321ac27a0ecSDave Kleikamp 4322c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 4323c89128a0SJaegeuk Kim if (ret == -EROFS) { 43241751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 4325c89128a0SJaegeuk Kim ret = 0; 4326c89128a0SJaegeuk Kim } else if (ret) 4327c89128a0SJaegeuk Kim goto failed_mount4a; 4328ef7f3835SKalpak Shah 4329ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4330670e9875STheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE && 4331670e9875STheodore Ts'o sbi->s_want_extra_isize == 0) { 4332ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4333ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4334e2b911c5SDarrick J. Wong if (ext4_has_feature_extra_isize(sb)) { 4335ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4336ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4337ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4338ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4339ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4340ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4341ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4342ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4343ef7f3835SKalpak Shah } 4344ef7f3835SKalpak Shah } 4345ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4346ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4347ef7f3835SKalpak Shah sbi->s_inode_size) { 4348ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4349ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4350b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4351b31e1552SEric Sandeen "available"); 4352ef7f3835SKalpak Shah } 4353ef7f3835SKalpak Shah 4354b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 435527dd4385SLukas Czerner 43566fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 43576fd058f7STheodore Ts'o if (err) { 4358b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4359fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4360f9ae9cf5STheodore Ts'o goto failed_mount4a; 4361f9ae9cf5STheodore Ts'o } 4362f9ae9cf5STheodore Ts'o 4363f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4364f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4365f9ae9cf5STheodore Ts'o if (err) { 4366f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4367f9ae9cf5STheodore Ts'o err); 4368dcf2d804STao Ma goto failed_mount5; 4369c2774d84SAneesh Kumar K.V } 4370c2774d84SAneesh Kumar K.V 4371d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4372d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4373d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4374908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4375908c7f19STejun Heo GFP_KERNEL); 4376d5e03cbbSTheodore Ts'o if (!err) { 4377d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4378d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4379908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4380908c7f19STejun Heo GFP_KERNEL); 4381d5e03cbbSTheodore Ts'o } 4382d5e03cbbSTheodore Ts'o if (!err) 4383d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4384908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4385d5e03cbbSTheodore Ts'o if (!err) 4386908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4387908c7f19STejun Heo GFP_KERNEL); 4388c8585c6fSDaeho Jeong if (!err) 4389c8585c6fSDaeho Jeong err = percpu_init_rwsem(&sbi->s_journal_flag_rwsem); 4390c8585c6fSDaeho Jeong 4391d5e03cbbSTheodore Ts'o if (err) { 4392d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4393d5e03cbbSTheodore Ts'o goto failed_mount6; 4394d5e03cbbSTheodore Ts'o } 4395d5e03cbbSTheodore Ts'o 4396e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 4397d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4398d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4399d5e03cbbSTheodore Ts'o "unable to initialize " 4400d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4401d5e03cbbSTheodore Ts'o goto failed_mount6; 4402d5e03cbbSTheodore Ts'o } 4403d5e03cbbSTheodore Ts'o 4404bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4405bfff6873SLukas Czerner if (err) 4406dcf2d804STao Ma goto failed_mount6; 4407bfff6873SLukas Czerner 4408b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 4409dcf2d804STao Ma if (err) 4410dcf2d804STao Ma goto failed_mount7; 44113197ebdbSTheodore Ts'o 44129b2ff357SJan Kara #ifdef CONFIG_QUOTA 44139b2ff357SJan Kara /* Enable quota usage during mount. */ 4414bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 44159b2ff357SJan Kara err = ext4_enable_quotas(sb); 44169b2ff357SJan Kara if (err) 44179b2ff357SJan Kara goto failed_mount8; 44189b2ff357SJan Kara } 44199b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 44209b2ff357SJan Kara 4421617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4422617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4423617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 44240390131bSFrank Mayhar if (needs_recovery) { 4425b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4426617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 44270390131bSFrank Mayhar } 44280390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 44290390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 44300390131bSFrank Mayhar descr = " journalled data mode"; 44310390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 44320390131bSFrank Mayhar descr = " ordered data mode"; 44330390131bSFrank Mayhar else 44340390131bSFrank Mayhar descr = " writeback data mode"; 44350390131bSFrank Mayhar } else 44360390131bSFrank Mayhar descr = "out journal"; 44370390131bSFrank Mayhar 443879add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 443979add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 444079add3a3SLukas Czerner if (!blk_queue_discard(q)) 444179add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 444279add3a3SLukas Czerner "mounting with \"discard\" option, but " 444379add3a3SLukas Czerner "the device does not support discard"); 444479add3a3SLukas Czerner } 444579add3a3SLukas Czerner 4446e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 4447d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 44485aee0f8aSTheodore Ts'o "Opts: %.*s%s%s", descr, 44495aee0f8aSTheodore Ts'o (int) sizeof(sbi->s_es->s_mount_opts), 44505aee0f8aSTheodore Ts'o sbi->s_es->s_mount_opts, 44518b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4452ac27a0ecSDave Kleikamp 445366e61a9eSTheodore Ts'o if (es->s_error_count) 445466e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4455ac27a0ecSDave Kleikamp 4456efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4457efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4458efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4459efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4460efbed4dcSTheodore Ts'o 4461d4c402d9SCurt Wohlgemuth kfree(orig_data); 4462ac27a0ecSDave Kleikamp return 0; 4463ac27a0ecSDave Kleikamp 4464617ba13bSMingming Cao cantfind_ext4: 4465ac27a0ecSDave Kleikamp if (!silent) 4466b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4467ac27a0ecSDave Kleikamp goto failed_mount; 4468ac27a0ecSDave Kleikamp 446972ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 447072ba7450STheodore Ts'o failed_mount8: 4471ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 447272ba7450STheodore Ts'o #endif 4473dcf2d804STao Ma failed_mount7: 4474dcf2d804STao Ma ext4_unregister_li_request(sb); 4475dcf2d804STao Ma failed_mount6: 4476f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4477d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4478b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 4479d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4480d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4481d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4482d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 448300764937SAzat Khuzhin failed_mount5: 4484f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4485f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4486f9ae9cf5STheodore Ts'o failed_mount4a: 448794bf608aSAl Viro dput(sb->s_root); 448832a9bb57SManish Katiyar sb->s_root = NULL; 448994bf608aSAl Viro failed_mount4: 4490b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 44912e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 44922e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 44934c0425ffSMingming Cao failed_mount_wq: 4494dec214d0STahsin Erdogan if (sbi->s_ea_inode_cache) { 4495dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 4496dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 4497dec214d0STahsin Erdogan } 449847387409STahsin Erdogan if (sbi->s_ea_block_cache) { 449947387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 450047387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 450182939d79SJan Kara } 45020390131bSFrank Mayhar if (sbi->s_journal) { 4503dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 450447b4a50bSJan Kara sbi->s_journal = NULL; 45050390131bSFrank Mayhar } 450650460fe8SDarrick J. Wong failed_mount3a: 4507d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4508eb68d0e2SZheng Liu failed_mount3: 45099105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4510c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4511c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4512ac27a0ecSDave Kleikamp failed_mount2: 4513ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4514ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4515b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4516ac27a0ecSDave Kleikamp failed_mount: 45170441984aSDarrick J. Wong if (sbi->s_chksum_driver) 45180441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4519ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4520a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4521ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4522ac27a0ecSDave Kleikamp #endif 4523617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4524ac27a0ecSDave Kleikamp brelse(bh); 4525ac27a0ecSDave Kleikamp out_fail: 4526ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4527f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 45285aee0f8aSTheodore Ts'o out_free_base: 4529ac27a0ecSDave Kleikamp kfree(sbi); 4530d4c402d9SCurt Wohlgemuth kfree(orig_data); 45315e405595SDan Williams fs_put_dax(dax_dev); 453207aa2ea1SLukas Czerner return err ? err : ret; 4533ac27a0ecSDave Kleikamp } 4534ac27a0ecSDave Kleikamp 4535ac27a0ecSDave Kleikamp /* 4536ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4537ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4538ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4539ac27a0ecSDave Kleikamp */ 4540617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4541ac27a0ecSDave Kleikamp { 4542617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4543ac27a0ecSDave Kleikamp 4544ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 454530773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 454630773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4547ac27a0ecSDave Kleikamp 4548a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4549ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4550dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4551ac27a0ecSDave Kleikamp else 4552dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 45535bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 45545bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 45555bf5683aSHidehiro Kawai else 45565bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4557a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4558ac27a0ecSDave Kleikamp } 4559ac27a0ecSDave Kleikamp 4560c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 4561ac27a0ecSDave Kleikamp unsigned int journal_inum) 4562ac27a0ecSDave Kleikamp { 4563ac27a0ecSDave Kleikamp struct inode *journal_inode; 4564ac27a0ecSDave Kleikamp 4565c6cb7e77SEric Whitney /* 4566c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 4567c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 4568c6cb7e77SEric Whitney * will try to delete it. 4569c6cb7e77SEric Whitney */ 45701d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 45711d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4572b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4573ac27a0ecSDave Kleikamp return NULL; 4574ac27a0ecSDave Kleikamp } 4575ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4576ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4577ac27a0ecSDave Kleikamp iput(journal_inode); 4578b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4579ac27a0ecSDave Kleikamp return NULL; 4580ac27a0ecSDave Kleikamp } 4581ac27a0ecSDave Kleikamp 4582e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4583ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 45841d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4585b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4586ac27a0ecSDave Kleikamp iput(journal_inode); 4587ac27a0ecSDave Kleikamp return NULL; 4588ac27a0ecSDave Kleikamp } 4589c6cb7e77SEric Whitney return journal_inode; 4590c6cb7e77SEric Whitney } 4591c6cb7e77SEric Whitney 4592c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 4593c6cb7e77SEric Whitney unsigned int journal_inum) 4594c6cb7e77SEric Whitney { 4595c6cb7e77SEric Whitney struct inode *journal_inode; 4596c6cb7e77SEric Whitney journal_t *journal; 4597c6cb7e77SEric Whitney 4598c6cb7e77SEric Whitney BUG_ON(!ext4_has_feature_journal(sb)); 4599c6cb7e77SEric Whitney 4600c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 4601c6cb7e77SEric Whitney if (!journal_inode) 4602c6cb7e77SEric Whitney return NULL; 4603ac27a0ecSDave Kleikamp 4604dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4605ac27a0ecSDave Kleikamp if (!journal) { 4606b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4607ac27a0ecSDave Kleikamp iput(journal_inode); 4608ac27a0ecSDave Kleikamp return NULL; 4609ac27a0ecSDave Kleikamp } 4610ac27a0ecSDave Kleikamp journal->j_private = sb; 4611617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4612ac27a0ecSDave Kleikamp return journal; 4613ac27a0ecSDave Kleikamp } 4614ac27a0ecSDave Kleikamp 4615617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4616ac27a0ecSDave Kleikamp dev_t j_dev) 4617ac27a0ecSDave Kleikamp { 4618ac27a0ecSDave Kleikamp struct buffer_head *bh; 4619ac27a0ecSDave Kleikamp journal_t *journal; 4620617ba13bSMingming Cao ext4_fsblk_t start; 4621617ba13bSMingming Cao ext4_fsblk_t len; 4622ac27a0ecSDave Kleikamp int hblock, blocksize; 4623617ba13bSMingming Cao ext4_fsblk_t sb_block; 4624ac27a0ecSDave Kleikamp unsigned long offset; 4625617ba13bSMingming Cao struct ext4_super_block *es; 4626ac27a0ecSDave Kleikamp struct block_device *bdev; 4627ac27a0ecSDave Kleikamp 4628e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 46290390131bSFrank Mayhar 4630b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4631ac27a0ecSDave Kleikamp if (bdev == NULL) 4632ac27a0ecSDave Kleikamp return NULL; 4633ac27a0ecSDave Kleikamp 4634ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4635e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4636ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4637b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4638b31e1552SEric Sandeen "blocksize too small for journal device"); 4639ac27a0ecSDave Kleikamp goto out_bdev; 4640ac27a0ecSDave Kleikamp } 4641ac27a0ecSDave Kleikamp 4642617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4643617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4644ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4645ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4646b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4647b31e1552SEric Sandeen "external journal"); 4648ac27a0ecSDave Kleikamp goto out_bdev; 4649ac27a0ecSDave Kleikamp } 4650ac27a0ecSDave Kleikamp 46512716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4652617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4653ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4654617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4655b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4656b31e1552SEric Sandeen "bad superblock"); 4657ac27a0ecSDave Kleikamp brelse(bh); 4658ac27a0ecSDave Kleikamp goto out_bdev; 4659ac27a0ecSDave Kleikamp } 4660ac27a0ecSDave Kleikamp 4661df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4662df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4663df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4664df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4665df4763beSDarrick J. Wong "corrupt superblock"); 4666df4763beSDarrick J. Wong brelse(bh); 4667df4763beSDarrick J. Wong goto out_bdev; 4668df4763beSDarrick J. Wong } 4669df4763beSDarrick J. Wong 4670617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4671b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4672ac27a0ecSDave Kleikamp brelse(bh); 4673ac27a0ecSDave Kleikamp goto out_bdev; 4674ac27a0ecSDave Kleikamp } 4675ac27a0ecSDave Kleikamp 4676bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4677ac27a0ecSDave Kleikamp start = sb_block + 1; 4678ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4679ac27a0ecSDave Kleikamp 4680dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4681ac27a0ecSDave Kleikamp start, len, blocksize); 4682ac27a0ecSDave Kleikamp if (!journal) { 4683b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4684ac27a0ecSDave Kleikamp goto out_bdev; 4685ac27a0ecSDave Kleikamp } 4686ac27a0ecSDave Kleikamp journal->j_private = sb; 4687dfec8a14SMike Christie ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4688ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4689ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4690b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4691ac27a0ecSDave Kleikamp goto out_journal; 4692ac27a0ecSDave Kleikamp } 4693ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4694b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4695b31e1552SEric Sandeen "user (unsupported) - %d", 4696ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4697ac27a0ecSDave Kleikamp goto out_journal; 4698ac27a0ecSDave Kleikamp } 4699617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4700617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4701ac27a0ecSDave Kleikamp return journal; 47020b8e58a1SAndreas Dilger 4703ac27a0ecSDave Kleikamp out_journal: 4704dab291afSMingming Cao jbd2_journal_destroy(journal); 4705ac27a0ecSDave Kleikamp out_bdev: 4706617ba13bSMingming Cao ext4_blkdev_put(bdev); 4707ac27a0ecSDave Kleikamp return NULL; 4708ac27a0ecSDave Kleikamp } 4709ac27a0ecSDave Kleikamp 4710617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4711617ba13bSMingming Cao struct ext4_super_block *es, 4712ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4713ac27a0ecSDave Kleikamp { 4714ac27a0ecSDave Kleikamp journal_t *journal; 4715ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4716ac27a0ecSDave Kleikamp dev_t journal_dev; 4717ac27a0ecSDave Kleikamp int err = 0; 4718ac27a0ecSDave Kleikamp int really_read_only; 4719ac27a0ecSDave Kleikamp 4720e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 47210390131bSFrank Mayhar 4722ac27a0ecSDave Kleikamp if (journal_devnum && 4723ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4724b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4725b31e1552SEric Sandeen "numbers have changed"); 4726ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4727ac27a0ecSDave Kleikamp } else 4728ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4729ac27a0ecSDave Kleikamp 4730ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4731ac27a0ecSDave Kleikamp 4732ac27a0ecSDave Kleikamp /* 4733ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4734ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4735ac27a0ecSDave Kleikamp * can get read-write access to the device. 4736ac27a0ecSDave Kleikamp */ 4737e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 4738bc98a42cSDavid Howells if (sb_rdonly(sb)) { 4739b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4740b31e1552SEric Sandeen "required on readonly filesystem"); 4741ac27a0ecSDave Kleikamp if (really_read_only) { 4742b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4743d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 4744d98bf8cdSSimon Ruderich "(try mounting with noload)"); 4745ac27a0ecSDave Kleikamp return -EROFS; 4746ac27a0ecSDave Kleikamp } 4747b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4748b31e1552SEric Sandeen "be enabled during recovery"); 4749ac27a0ecSDave Kleikamp } 4750ac27a0ecSDave Kleikamp } 4751ac27a0ecSDave Kleikamp 4752ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4753b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4754b31e1552SEric Sandeen "and inode journals!"); 4755ac27a0ecSDave Kleikamp return -EINVAL; 4756ac27a0ecSDave Kleikamp } 4757ac27a0ecSDave Kleikamp 4758ac27a0ecSDave Kleikamp if (journal_inum) { 4759617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4760ac27a0ecSDave Kleikamp return -EINVAL; 4761ac27a0ecSDave Kleikamp } else { 4762617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4763ac27a0ecSDave Kleikamp return -EINVAL; 4764ac27a0ecSDave Kleikamp } 4765ac27a0ecSDave Kleikamp 476690576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4767b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 47684776004fSTheodore Ts'o 4769e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 4770dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 47711c13d5c0STheodore Ts'o if (!err) { 47721c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 47731c13d5c0STheodore Ts'o if (save) 47741c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 47751c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4776dab291afSMingming Cao err = jbd2_journal_load(journal); 47771c13d5c0STheodore Ts'o if (save) 47781c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 47791c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 47801c13d5c0STheodore Ts'o kfree(save); 47811c13d5c0STheodore Ts'o } 4782ac27a0ecSDave Kleikamp 4783ac27a0ecSDave Kleikamp if (err) { 4784b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4785dab291afSMingming Cao jbd2_journal_destroy(journal); 4786ac27a0ecSDave Kleikamp return err; 4787ac27a0ecSDave Kleikamp } 4788ac27a0ecSDave Kleikamp 4789617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4790617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4791ac27a0ecSDave Kleikamp 4792c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4793ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4794ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4795ac27a0ecSDave Kleikamp 4796ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4797e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4798ac27a0ecSDave Kleikamp } 4799ac27a0ecSDave Kleikamp 4800ac27a0ecSDave Kleikamp return 0; 4801ac27a0ecSDave Kleikamp } 4802ac27a0ecSDave Kleikamp 4803e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4804ac27a0ecSDave Kleikamp { 4805e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4806617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4807c4be0c1dSTakashi Sato int error = 0; 4808ac27a0ecSDave Kleikamp 4809bdfe0cbdSTheodore Ts'o if (!sbh || block_device_ejected(sb)) 4810c4be0c1dSTakashi Sato return error; 481171290b36STheodore Ts'o /* 481271290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 481371290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 481471290b36STheodore Ts'o * write time when we are mounting the root file system 481571290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 481671290b36STheodore Ts'o * for people who are east of GMT and who make their clock 481771290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 481871290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 481971290b36STheodore Ts'o * to complain and force a full file system check. 482071290b36STheodore Ts'o */ 48211751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 4822ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4823f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4824afc32f7eSTheodore Ts'o es->s_kbytes_written = 4825afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4826afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4827afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4828f613dfcbSTheodore Ts'o else 4829f613dfcbSTheodore Ts'o es->s_kbytes_written = 4830f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4831d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 483257042651STheodore Ts'o ext4_free_blocks_count_set(es, 483357042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 483457042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4835d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 48367f93cff9STheodore Ts'o es->s_free_inodes_count = 48377f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 48385d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4839ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 484006db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 48411566a48aSTheodore Ts'o if (sync) 48424743f839SPranay Kr. Srivastava lock_buffer(sbh); 48434743f839SPranay Kr. Srivastava if (buffer_write_io_error(sbh)) { 48444743f839SPranay Kr. Srivastava /* 48454743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 48464743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 48474743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 48484743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 48494743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 48504743f839SPranay Kr. Srivastava * write and hope for the best. 48514743f839SPranay Kr. Srivastava */ 48524743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 48534743f839SPranay Kr. Srivastava "superblock detected"); 48544743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 48554743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 48564743f839SPranay Kr. Srivastava } 4857ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4858914258bfSTheodore Ts'o if (sync) { 48591566a48aSTheodore Ts'o unlock_buffer(sbh); 4860564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 486100473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 4862c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 4863b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4864b31e1552SEric Sandeen "superblock"); 4865914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4866914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4867914258bfSTheodore Ts'o } 4868914258bfSTheodore Ts'o } 4869c4be0c1dSTakashi Sato return error; 4870ac27a0ecSDave Kleikamp } 4871ac27a0ecSDave Kleikamp 4872ac27a0ecSDave Kleikamp /* 4873ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4874ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4875ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4876ac27a0ecSDave Kleikamp */ 4877617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4878617ba13bSMingming Cao struct ext4_super_block *es) 4879ac27a0ecSDave Kleikamp { 4880617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4881ac27a0ecSDave Kleikamp 4882e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 48830390131bSFrank Mayhar BUG_ON(journal != NULL); 48840390131bSFrank Mayhar return; 48850390131bSFrank Mayhar } 4886dab291afSMingming Cao jbd2_journal_lock_updates(journal); 48877ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 48887ffe1ea8SHidehiro Kawai goto out; 48897ffe1ea8SHidehiro Kawai 4890bc98a42cSDavid Howells if (ext4_has_feature_journal_needs_recovery(sb) && sb_rdonly(sb)) { 4891e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4892e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4893ac27a0ecSDave Kleikamp } 48947ffe1ea8SHidehiro Kawai 48957ffe1ea8SHidehiro Kawai out: 4896dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4897ac27a0ecSDave Kleikamp } 4898ac27a0ecSDave Kleikamp 4899ac27a0ecSDave Kleikamp /* 4900ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4901ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4902ac27a0ecSDave Kleikamp * main filesystem now. 4903ac27a0ecSDave Kleikamp */ 4904617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4905617ba13bSMingming Cao struct ext4_super_block *es) 4906ac27a0ecSDave Kleikamp { 4907ac27a0ecSDave Kleikamp journal_t *journal; 4908ac27a0ecSDave Kleikamp int j_errno; 4909ac27a0ecSDave Kleikamp const char *errstr; 4910ac27a0ecSDave Kleikamp 4911e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 49120390131bSFrank Mayhar 4913617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4914ac27a0ecSDave Kleikamp 4915ac27a0ecSDave Kleikamp /* 4916ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4917617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4918ac27a0ecSDave Kleikamp */ 4919ac27a0ecSDave Kleikamp 4920dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4921ac27a0ecSDave Kleikamp if (j_errno) { 4922ac27a0ecSDave Kleikamp char nbuf[16]; 4923ac27a0ecSDave Kleikamp 4924617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 492512062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4926ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 492712062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4928ac27a0ecSDave Kleikamp 4929617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4930617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4931e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4932ac27a0ecSDave Kleikamp 4933dab291afSMingming Cao jbd2_journal_clear_err(journal); 4934d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4935ac27a0ecSDave Kleikamp } 4936ac27a0ecSDave Kleikamp } 4937ac27a0ecSDave Kleikamp 4938ac27a0ecSDave Kleikamp /* 4939ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4940ac27a0ecSDave Kleikamp * and wait on the commit. 4941ac27a0ecSDave Kleikamp */ 4942617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4943ac27a0ecSDave Kleikamp { 4944ac27a0ecSDave Kleikamp journal_t *journal; 4945ac27a0ecSDave Kleikamp 4946bc98a42cSDavid Howells if (sb_rdonly(sb)) 4947ac27a0ecSDave Kleikamp return 0; 4948ac27a0ecSDave Kleikamp 4949617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4950b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4951ac27a0ecSDave Kleikamp } 4952ac27a0ecSDave Kleikamp 4953617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4954ac27a0ecSDave Kleikamp { 495514ce0cb4STheodore Ts'o int ret = 0; 49569eddacf9SJan Kara tid_t target; 495706a407f1SDmitry Monakhov bool needs_barrier = false; 49588d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4959ac27a0ecSDave Kleikamp 496049598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 49610db1ff22STheodore Ts'o return 0; 49620db1ff22STheodore Ts'o 49639bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 49642e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4965a1177825SJan Kara /* 4966a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4967a1177825SJan Kara * no dirty dquots 4968a1177825SJan Kara */ 4969a1177825SJan Kara dquot_writeback_dquots(sb, -1); 497006a407f1SDmitry Monakhov /* 497106a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 497206a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 497306a407f1SDmitry Monakhov * transaction_commit will do it for us. 497406a407f1SDmitry Monakhov */ 4975bda32530STheodore Ts'o if (sbi->s_journal) { 497606a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 497706a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 497806a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 497906a407f1SDmitry Monakhov needs_barrier = true; 498006a407f1SDmitry Monakhov 49818d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4982ac27a0ecSDave Kleikamp if (wait) 4983bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4984bda32530STheodore Ts'o target); 49850390131bSFrank Mayhar } 4986bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4987bda32530STheodore Ts'o needs_barrier = true; 498806a407f1SDmitry Monakhov if (needs_barrier) { 498906a407f1SDmitry Monakhov int err; 499006a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 499106a407f1SDmitry Monakhov if (!ret) 499206a407f1SDmitry Monakhov ret = err; 499306a407f1SDmitry Monakhov } 499406a407f1SDmitry Monakhov 499506a407f1SDmitry Monakhov return ret; 499606a407f1SDmitry Monakhov } 499706a407f1SDmitry Monakhov 4998ac27a0ecSDave Kleikamp /* 4999ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 5000ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 5001be4f27d3SYongqiang Yang * 5002be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 50038e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 50048e8ad8a5SJan Kara * modifications. 5005ac27a0ecSDave Kleikamp */ 5006c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 5007ac27a0ecSDave Kleikamp { 5008c4be0c1dSTakashi Sato int error = 0; 5009c4be0c1dSTakashi Sato journal_t *journal; 5010ac27a0ecSDave Kleikamp 5011bc98a42cSDavid Howells if (sb_rdonly(sb)) 50129ca92389STheodore Ts'o return 0; 50139ca92389STheodore Ts'o 5014c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 5015ac27a0ecSDave Kleikamp 5016bb044576STheodore Ts'o if (journal) { 5017ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 5018dab291afSMingming Cao jbd2_journal_lock_updates(journal); 50197ffe1ea8SHidehiro Kawai 50207ffe1ea8SHidehiro Kawai /* 5021bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 5022bb044576STheodore Ts'o * flush the journal. 50237ffe1ea8SHidehiro Kawai */ 5024c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 50256b0310fbSEric Sandeen if (error < 0) 50266b0310fbSEric Sandeen goto out; 5027ac27a0ecSDave Kleikamp 5028ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 5029e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 5030c642dc9eSEric Sandeen } 5031c642dc9eSEric Sandeen 5032e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 50336b0310fbSEric Sandeen out: 5034bb044576STheodore Ts'o if (journal) 50358e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 5036bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 50376b0310fbSEric Sandeen return error; 5038ac27a0ecSDave Kleikamp } 5039ac27a0ecSDave Kleikamp 5040ac27a0ecSDave Kleikamp /* 5041ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 5042ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 5043ac27a0ecSDave Kleikamp */ 5044c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 5045ac27a0ecSDave Kleikamp { 5046bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 50479ca92389STheodore Ts'o return 0; 50489ca92389STheodore Ts'o 5049c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 50509ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 5051e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 5052c642dc9eSEric Sandeen } 5053c642dc9eSEric Sandeen 5054e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 5055c4be0c1dSTakashi Sato return 0; 5056ac27a0ecSDave Kleikamp } 5057ac27a0ecSDave Kleikamp 5058673c6100STheodore Ts'o /* 5059673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 5060673c6100STheodore Ts'o */ 5061673c6100STheodore Ts'o struct ext4_mount_options { 5062673c6100STheodore Ts'o unsigned long s_mount_opt; 5063a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 506408cefc7aSEric W. Biederman kuid_t s_resuid; 506508cefc7aSEric W. Biederman kgid_t s_resgid; 5066673c6100STheodore Ts'o unsigned long s_commit_interval; 5067673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 5068673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 5069673c6100STheodore Ts'o int s_jquota_fmt; 5070a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 5071673c6100STheodore Ts'o #endif 5072673c6100STheodore Ts'o }; 5073673c6100STheodore Ts'o 5074617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 5075ac27a0ecSDave Kleikamp { 5076617ba13bSMingming Cao struct ext4_super_block *es; 5077617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5078ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 5079617ba13bSMingming Cao struct ext4_mount_options old_opts; 5080c79d967dSChristoph Hellwig int enable_quota = 0; 50818a266467STheodore Ts'o ext4_group_t g; 5082b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 5083c5e06d10SJohann Lombardi int err = 0; 5084ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 508503dafb5fSChen Gang int i, j; 5086ac27a0ecSDave Kleikamp #endif 5087d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 5088ac27a0ecSDave Kleikamp 5089ac27a0ecSDave Kleikamp /* Store the original options */ 5090ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 5091ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 5092a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 5093ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 5094ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 5095ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 509630773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 509730773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 5098ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5099ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 5100a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 510103dafb5fSChen Gang if (sbi->s_qf_names[i]) { 510203dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 510303dafb5fSChen Gang GFP_KERNEL); 510403dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 510503dafb5fSChen Gang for (j = 0; j < i; j++) 510603dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 51073e36a163SWei Yongjun kfree(orig_data); 510803dafb5fSChen Gang return -ENOMEM; 510903dafb5fSChen Gang } 511003dafb5fSChen Gang } else 511103dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 5112ac27a0ecSDave Kleikamp #endif 5113b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 5114b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 5115ac27a0ecSDave Kleikamp 5116661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 5117ac27a0ecSDave Kleikamp err = -EINVAL; 5118ac27a0ecSDave Kleikamp goto restore_opts; 5119ac27a0ecSDave Kleikamp } 5120ac27a0ecSDave Kleikamp 51216b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 51226b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 51236b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 51242d5b86e0SEric Sandeen "during remount not supported; ignoring"); 51252d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 5126c6d3d56dSDarrick J. Wong } 5127c6d3d56dSDarrick J. Wong 51286ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 51296ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 51306ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 51316ae6514bSPiotr Sarna "both data=journal and delalloc"); 51326ae6514bSPiotr Sarna err = -EINVAL; 51336ae6514bSPiotr Sarna goto restore_opts; 51346ae6514bSPiotr Sarna } 51356ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 51366ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 51376ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 51386ae6514bSPiotr Sarna err = -EINVAL; 51396ae6514bSPiotr Sarna goto restore_opts; 51406ae6514bSPiotr Sarna } 5141923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 5142923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 5143923ae0ffSRoss Zwisler "both data=journal and dax"); 5144923ae0ffSRoss Zwisler err = -EINVAL; 5145923ae0ffSRoss Zwisler goto restore_opts; 5146923ae0ffSRoss Zwisler } 5147ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 5148ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5149ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5150ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5151ab04df78SJan Kara err = -EINVAL; 5152ab04df78SJan Kara goto restore_opts; 5153ab04df78SJan Kara } 5154923ae0ffSRoss Zwisler } 5155923ae0ffSRoss Zwisler 5156cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 5157cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 5158cdb7ee4cSTahsin Erdogan err = -EINVAL; 5159cdb7ee4cSTahsin Erdogan goto restore_opts; 5160cdb7ee4cSTahsin Erdogan } 5161cdb7ee4cSTahsin Erdogan 5162923ae0ffSRoss Zwisler if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { 5163923ae0ffSRoss Zwisler ext4_msg(sb, KERN_WARNING, "warning: refusing change of " 5164923ae0ffSRoss Zwisler "dax flag with busy inodes while remounting"); 5165923ae0ffSRoss Zwisler sbi->s_mount_opt ^= EXT4_MOUNT_DAX; 51666ae6514bSPiotr Sarna } 51676ae6514bSPiotr Sarna 51684ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 5169c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 5170ac27a0ecSDave Kleikamp 51711751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 51721751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 5173ac27a0ecSDave Kleikamp 5174ac27a0ecSDave Kleikamp es = sbi->s_es; 5175ac27a0ecSDave Kleikamp 5176b3881f74STheodore Ts'o if (sbi->s_journal) { 5177617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 5178b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 5179b3881f74STheodore Ts'o } 5180ac27a0ecSDave Kleikamp 51811751e8a6SLinus Torvalds if (*flags & SB_LAZYTIME) 51821751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 5183a2fd66d0STheodore Ts'o 51841751e8a6SLinus Torvalds if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 51854ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 5186ac27a0ecSDave Kleikamp err = -EROFS; 5187ac27a0ecSDave Kleikamp goto restore_opts; 5188ac27a0ecSDave Kleikamp } 5189ac27a0ecSDave Kleikamp 51901751e8a6SLinus Torvalds if (*flags & SB_RDONLY) { 519138c03b34STheodore Ts'o err = sync_filesystem(sb); 519238c03b34STheodore Ts'o if (err < 0) 519338c03b34STheodore Ts'o goto restore_opts; 51940f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 51950f0dd62fSChristoph Hellwig if (err < 0) 5196c79d967dSChristoph Hellwig goto restore_opts; 5197c79d967dSChristoph Hellwig 5198ac27a0ecSDave Kleikamp /* 5199ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 5200ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 5201ac27a0ecSDave Kleikamp */ 52021751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5203ac27a0ecSDave Kleikamp 5204ac27a0ecSDave Kleikamp /* 5205ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 5206ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 5207ac27a0ecSDave Kleikamp * mark the partition as valid again. 5208ac27a0ecSDave Kleikamp */ 5209617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 5210617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 5211ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 5212ac27a0ecSDave Kleikamp 5213a63c9eb2STheodore Ts'o if (sbi->s_journal) 5214617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 5215ac27a0ecSDave Kleikamp } else { 5216a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 5217e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 52182cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 5219ac27a0ecSDave Kleikamp err = -EROFS; 5220ac27a0ecSDave Kleikamp goto restore_opts; 5221ac27a0ecSDave Kleikamp } 5222ead6596bSEric Sandeen /* 52238a266467STheodore Ts'o * Make sure the group descriptor checksums 52240b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 52258a266467STheodore Ts'o */ 52268a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 52278a266467STheodore Ts'o struct ext4_group_desc *gdp = 52288a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 52298a266467STheodore Ts'o 5230feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 5231b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5232b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 5233e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 52348a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 52356a797d27SDarrick J. Wong err = -EFSBADCRC; 52368a266467STheodore Ts'o goto restore_opts; 52378a266467STheodore Ts'o } 52388a266467STheodore Ts'o } 52398a266467STheodore Ts'o 52408a266467STheodore Ts'o /* 5241ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 5242ead6596bSEric Sandeen * around from a previously readonly bdev mount, 5243ead6596bSEric Sandeen * require a full umount/remount for now. 5244ead6596bSEric Sandeen */ 5245ead6596bSEric Sandeen if (es->s_last_orphan) { 5246b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 5247ead6596bSEric Sandeen "remount RDWR because of unprocessed " 5248ead6596bSEric Sandeen "orphan inode list. Please " 5249b31e1552SEric Sandeen "umount/remount instead"); 5250ead6596bSEric Sandeen err = -EINVAL; 5251ead6596bSEric Sandeen goto restore_opts; 5252ead6596bSEric Sandeen } 5253ead6596bSEric Sandeen 5254ac27a0ecSDave Kleikamp /* 5255ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 5256ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 5257ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 5258ac27a0ecSDave Kleikamp * the partition.) 5259ac27a0ecSDave Kleikamp */ 52600390131bSFrank Mayhar if (sbi->s_journal) 5261617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 5262ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 5263c89128a0SJaegeuk Kim 5264c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 5265c89128a0SJaegeuk Kim if (err) 5266c89128a0SJaegeuk Kim goto restore_opts; 5267c89128a0SJaegeuk Kim 52681751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 5269e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 5270c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 5271c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 5272c5e06d10SJohann Lombardi err = -EROFS; 5273c5e06d10SJohann Lombardi goto restore_opts; 5274c5e06d10SJohann Lombardi } 5275c79d967dSChristoph Hellwig enable_quota = 1; 5276ac27a0ecSDave Kleikamp } 5277ac27a0ecSDave Kleikamp } 5278bfff6873SLukas Czerner 5279bfff6873SLukas Czerner /* 5280bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 5281bfff6873SLukas Czerner * current settings 5282bfff6873SLukas Czerner */ 5283bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 5284bfff6873SLukas Czerner ext4_unregister_li_request(sb); 5285bfff6873SLukas Czerner else { 5286bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 5287bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 5288bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 5289bfff6873SLukas Czerner } 5290bfff6873SLukas Czerner 52916fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 5292c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 5293c89128a0SJaegeuk Kim err = ext4_commit_super(sb, 1); 5294c89128a0SJaegeuk Kim if (err) 5295c89128a0SJaegeuk Kim goto restore_opts; 5296c89128a0SJaegeuk Kim } 52970390131bSFrank Mayhar 5298ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5299ac27a0ecSDave Kleikamp /* Release old quota file names */ 5300a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 5301ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 53027c319d32SAditya Kali if (enable_quota) { 53037c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 53040f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 5305e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 53067c319d32SAditya Kali err = ext4_enable_quotas(sb); 530707724f98STheodore Ts'o if (err) 53087c319d32SAditya Kali goto restore_opts; 53097c319d32SAditya Kali } 53107c319d32SAditya Kali } 53117c319d32SAditya Kali #endif 5312d4c402d9SCurt Wohlgemuth 53131751e8a6SLinus Torvalds *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME); 5314d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5315d4c402d9SCurt Wohlgemuth kfree(orig_data); 5316ac27a0ecSDave Kleikamp return 0; 53170b8e58a1SAndreas Dilger 5318ac27a0ecSDave Kleikamp restore_opts: 5319ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5320ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5321a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5322ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5323ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5324ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 532530773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 532630773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5327ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5328ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5329a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5330ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5331ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5332ac27a0ecSDave Kleikamp } 5333ac27a0ecSDave Kleikamp #endif 5334d4c402d9SCurt Wohlgemuth kfree(orig_data); 5335ac27a0ecSDave Kleikamp return err; 5336ac27a0ecSDave Kleikamp } 5337ac27a0ecSDave Kleikamp 5338689c958cSLi Xi #ifdef CONFIG_QUOTA 5339689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 5340689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 5341689c958cSLi Xi { 5342689c958cSLi Xi struct kqid qid; 5343689c958cSLi Xi struct dquot *dquot; 5344689c958cSLi Xi u64 limit; 5345689c958cSLi Xi u64 curblock; 5346689c958cSLi Xi 5347689c958cSLi Xi qid = make_kqid_projid(projid); 5348689c958cSLi Xi dquot = dqget(sb, qid); 5349689c958cSLi Xi if (IS_ERR(dquot)) 5350689c958cSLi Xi return PTR_ERR(dquot); 53517b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 5352689c958cSLi Xi 5353689c958cSLi Xi limit = (dquot->dq_dqb.dqb_bsoftlimit ? 5354689c958cSLi Xi dquot->dq_dqb.dqb_bsoftlimit : 5355689c958cSLi Xi dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; 5356689c958cSLi Xi if (limit && buf->f_blocks > limit) { 5357f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 5358f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 5359689c958cSLi Xi buf->f_blocks = limit; 5360689c958cSLi Xi buf->f_bfree = buf->f_bavail = 5361689c958cSLi Xi (buf->f_blocks > curblock) ? 5362689c958cSLi Xi (buf->f_blocks - curblock) : 0; 5363689c958cSLi Xi } 5364689c958cSLi Xi 5365689c958cSLi Xi limit = dquot->dq_dqb.dqb_isoftlimit ? 5366689c958cSLi Xi dquot->dq_dqb.dqb_isoftlimit : 5367689c958cSLi Xi dquot->dq_dqb.dqb_ihardlimit; 5368689c958cSLi Xi if (limit && buf->f_files > limit) { 5369689c958cSLi Xi buf->f_files = limit; 5370689c958cSLi Xi buf->f_ffree = 5371689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 5372689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 5373689c958cSLi Xi } 5374689c958cSLi Xi 53757b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 5376689c958cSLi Xi dqput(dquot); 5377689c958cSLi Xi return 0; 5378689c958cSLi Xi } 5379689c958cSLi Xi #endif 5380689c958cSLi Xi 5381617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5382ac27a0ecSDave Kleikamp { 5383ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5384617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5385617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 538627dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5387960cc398SPekka Enberg u64 fsid; 5388d02a9391SKazuya Mio s64 bfree; 538927dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5390ac27a0ecSDave Kleikamp 5391952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5392952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5393ac27a0ecSDave Kleikamp 5394617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5395ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5396b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 539757042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 539857042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5399d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 540057042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 540127dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 540227dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 540327dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5404ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5405ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 540652d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5407617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5408960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5409960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5410960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5411960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 54120b8e58a1SAndreas Dilger 5413689c958cSLi Xi #ifdef CONFIG_QUOTA 5414689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 5415689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 5416689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 5417689c958cSLi Xi #endif 5418ac27a0ecSDave Kleikamp return 0; 5419ac27a0ecSDave Kleikamp } 5420ac27a0ecSDave Kleikamp 5421ac27a0ecSDave Kleikamp 5422ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5423ac27a0ecSDave Kleikamp 5424bc8230eeSJan Kara /* 5425bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 5426bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 5427bc8230eeSJan Kara */ 5428ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5429ac27a0ecSDave Kleikamp { 54304c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5431ac27a0ecSDave Kleikamp } 5432ac27a0ecSDave Kleikamp 5433617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5434ac27a0ecSDave Kleikamp { 5435ac27a0ecSDave Kleikamp int ret, err; 5436ac27a0ecSDave Kleikamp handle_t *handle; 5437ac27a0ecSDave Kleikamp struct inode *inode; 5438ac27a0ecSDave Kleikamp 5439ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 54409924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5441617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5442ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5443ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5444ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5445617ba13bSMingming Cao err = ext4_journal_stop(handle); 5446ac27a0ecSDave Kleikamp if (!ret) 5447ac27a0ecSDave Kleikamp ret = err; 5448ac27a0ecSDave Kleikamp return ret; 5449ac27a0ecSDave Kleikamp } 5450ac27a0ecSDave Kleikamp 5451617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5452ac27a0ecSDave Kleikamp { 5453ac27a0ecSDave Kleikamp int ret, err; 5454ac27a0ecSDave Kleikamp handle_t *handle; 5455ac27a0ecSDave Kleikamp 54569924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5457617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5458ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5459ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5460ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5461617ba13bSMingming Cao err = ext4_journal_stop(handle); 5462ac27a0ecSDave Kleikamp if (!ret) 5463ac27a0ecSDave Kleikamp ret = err; 5464ac27a0ecSDave Kleikamp return ret; 5465ac27a0ecSDave Kleikamp } 5466ac27a0ecSDave Kleikamp 5467617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5468ac27a0ecSDave Kleikamp { 5469ac27a0ecSDave Kleikamp int ret, err; 5470ac27a0ecSDave Kleikamp handle_t *handle; 5471ac27a0ecSDave Kleikamp 54729924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5473617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 54749c3013e9SJan Kara if (IS_ERR(handle)) { 54759c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 54769c3013e9SJan Kara dquot_release(dquot); 5477ac27a0ecSDave Kleikamp return PTR_ERR(handle); 54789c3013e9SJan Kara } 5479ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5480617ba13bSMingming Cao err = ext4_journal_stop(handle); 5481ac27a0ecSDave Kleikamp if (!ret) 5482ac27a0ecSDave Kleikamp ret = err; 5483ac27a0ecSDave Kleikamp return ret; 5484ac27a0ecSDave Kleikamp } 5485ac27a0ecSDave Kleikamp 5486617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5487ac27a0ecSDave Kleikamp { 5488262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5489262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5490262b4662SJan Kara 54912c8be6b2SJan Kara /* Are we journaling quotas? */ 5492e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) || 5493262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5494ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5495617ba13bSMingming Cao return ext4_write_dquot(dquot); 5496ac27a0ecSDave Kleikamp } else { 5497ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5498ac27a0ecSDave Kleikamp } 5499ac27a0ecSDave Kleikamp } 5500ac27a0ecSDave Kleikamp 5501617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5502ac27a0ecSDave Kleikamp { 5503ac27a0ecSDave Kleikamp int ret, err; 5504ac27a0ecSDave Kleikamp handle_t *handle; 5505ac27a0ecSDave Kleikamp 5506ac27a0ecSDave Kleikamp /* Data block + inode block */ 55072b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 5508ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5509ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5510ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5511617ba13bSMingming Cao err = ext4_journal_stop(handle); 5512ac27a0ecSDave Kleikamp if (!ret) 5513ac27a0ecSDave Kleikamp ret = err; 5514ac27a0ecSDave Kleikamp return ret; 5515ac27a0ecSDave Kleikamp } 5516ac27a0ecSDave Kleikamp 5517ac27a0ecSDave Kleikamp /* 5518ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5519ac27a0ecSDave Kleikamp * the quota file and such... 5520ac27a0ecSDave Kleikamp */ 5521617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5522ac27a0ecSDave Kleikamp { 5523287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5524617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5525ac27a0ecSDave Kleikamp } 5526ac27a0ecSDave Kleikamp 5527daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 5528daf647d2STheodore Ts'o { 5529daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 5530daf647d2STheodore Ts'o 5531daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 5532daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 5533daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 5534daf647d2STheodore Ts'o * because the name of the lock is set using the 5535daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 5536daf647d2STheodore Ts'o */ 5537daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 5538daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 5539daf647d2STheodore Ts'o } 5540daf647d2STheodore Ts'o 5541ac27a0ecSDave Kleikamp /* 5542ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5543ac27a0ecSDave Kleikamp */ 5544617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 55458c54ca9cSAl Viro const struct path *path) 5546ac27a0ecSDave Kleikamp { 5547ac27a0ecSDave Kleikamp int err; 5548ac27a0ecSDave Kleikamp 5549ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5550ac27a0ecSDave Kleikamp return -EINVAL; 55510623543bSJan Kara 5552ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5553d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5554ac27a0ecSDave Kleikamp return -EXDEV; 55550623543bSJan Kara /* Journaling quota? */ 55560623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 55572b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5558f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5559b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5560b31e1552SEric Sandeen "Quota file not on filesystem root. " 5561b31e1552SEric Sandeen "Journaled quota will not work"); 556291389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 556391389240SJan Kara } else { 556491389240SJan Kara /* 556591389240SJan Kara * Clear the flag just in case mount options changed since 556691389240SJan Kara * last time. 556791389240SJan Kara */ 556891389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 55690623543bSJan Kara } 55700623543bSJan Kara 55710623543bSJan Kara /* 55720623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 55730623543bSJan Kara * all updates to the file when we bypass pagecache... 55740623543bSJan Kara */ 55750390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 55762b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 55770623543bSJan Kara /* 55780623543bSJan Kara * We don't need to lock updates but journal_flush() could 55790623543bSJan Kara * otherwise be livelocked... 55800623543bSJan Kara */ 55810623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 55827ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 55830623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5584f00c9e44SJan Kara if (err) 55857ffe1ea8SHidehiro Kawai return err; 55867ffe1ea8SHidehiro Kawai } 5587957153fcSJan Kara 5588daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 5589daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 5590957153fcSJan Kara if (err) { 5591daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 5592daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 5593957153fcSJan Kara } else { 5594957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 5595957153fcSJan Kara handle_t *handle; 5596957153fcSJan Kara 559761a92987SJan Kara /* 559861a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 559961a92987SJan Kara * files. If this fails, we return success anyway since quotas 560061a92987SJan Kara * are already enabled and this is not a hard failure. 560161a92987SJan Kara */ 5602957153fcSJan Kara inode_lock(inode); 5603957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 5604957153fcSJan Kara if (IS_ERR(handle)) 5605957153fcSJan Kara goto unlock_inode; 5606957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 5607957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 5608957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 5609957153fcSJan Kara ext4_mark_inode_dirty(handle, inode); 5610957153fcSJan Kara ext4_journal_stop(handle); 5611957153fcSJan Kara unlock_inode: 5612957153fcSJan Kara inode_unlock(inode); 5613957153fcSJan Kara } 5614daf647d2STheodore Ts'o return err; 5615ac27a0ecSDave Kleikamp } 5616ac27a0ecSDave Kleikamp 56177c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 56187c319d32SAditya Kali unsigned int flags) 56197c319d32SAditya Kali { 56207c319d32SAditya Kali int err; 56217c319d32SAditya Kali struct inode *qf_inode; 5622a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 56237c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5624689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5625689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 56267c319d32SAditya Kali }; 56277c319d32SAditya Kali 5628e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 56297c319d32SAditya Kali 56307c319d32SAditya Kali if (!qf_inums[type]) 56317c319d32SAditya Kali return -EPERM; 56327c319d32SAditya Kali 56337c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 56347c319d32SAditya Kali if (IS_ERR(qf_inode)) { 56357c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 56367c319d32SAditya Kali return PTR_ERR(qf_inode); 56377c319d32SAditya Kali } 56387c319d32SAditya Kali 5639bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5640bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 5641daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 56427c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 56437c319d32SAditya Kali iput(qf_inode); 5644daf647d2STheodore Ts'o if (err) 5645daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 56467c319d32SAditya Kali 56477c319d32SAditya Kali return err; 56487c319d32SAditya Kali } 56497c319d32SAditya Kali 56507c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 56517c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 56527c319d32SAditya Kali { 56537c319d32SAditya Kali int type, err = 0; 5654a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 56557c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5656689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5657689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 56587c319d32SAditya Kali }; 565949da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 566049da9392SJan Kara test_opt(sb, USRQUOTA), 566149da9392SJan Kara test_opt(sb, GRPQUOTA), 566249da9392SJan Kara test_opt(sb, PRJQUOTA), 566349da9392SJan Kara }; 56647c319d32SAditya Kali 566591389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 5666a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 56677c319d32SAditya Kali if (qf_inums[type]) { 56687c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 566949da9392SJan Kara DQUOT_USAGE_ENABLED | 567049da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 56717c319d32SAditya Kali if (err) { 567295f1fda4Szhangyi (F) for (type--; type >= 0; type--) 567395f1fda4Szhangyi (F) dquot_quota_off(sb, type); 567495f1fda4Szhangyi (F) 56757c319d32SAditya Kali ext4_warning(sb, 567672ba7450STheodore Ts'o "Failed to enable quota tracking " 567772ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 567872ba7450STheodore Ts'o "e2fsck to fix.", type, err); 56797c319d32SAditya Kali return err; 56807c319d32SAditya Kali } 56817c319d32SAditya Kali } 56827c319d32SAditya Kali } 56837c319d32SAditya Kali return 0; 56847c319d32SAditya Kali } 56857c319d32SAditya Kali 5686ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5687ca0e05e4SDmitry Monakhov { 568821f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 568921f97697SJan Kara handle_t *handle; 5690957153fcSJan Kara int err; 569121f97697SJan Kara 569287009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 569387009d86SDmitry Monakhov * Caller already holds s_umount sem */ 569487009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5695ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5696ca0e05e4SDmitry Monakhov 5697957153fcSJan Kara if (!inode || !igrab(inode)) 56980b268590SAmir Goldstein goto out; 56990b268590SAmir Goldstein 5700957153fcSJan Kara err = dquot_quota_off(sb, type); 5701964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 5702957153fcSJan Kara goto out_put; 5703957153fcSJan Kara 5704957153fcSJan Kara inode_lock(inode); 570561a92987SJan Kara /* 570661a92987SJan Kara * Update modification times of quota files when userspace can 570761a92987SJan Kara * start looking at them. If we fail, we return success anyway since 570861a92987SJan Kara * this is not a hard failure and quotas are already disabled. 570961a92987SJan Kara */ 57109924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 571121f97697SJan Kara if (IS_ERR(handle)) 5712957153fcSJan Kara goto out_unlock; 5713957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 5714957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 5715eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 571621f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 571721f97697SJan Kara ext4_journal_stop(handle); 5718957153fcSJan Kara out_unlock: 5719957153fcSJan Kara inode_unlock(inode); 5720957153fcSJan Kara out_put: 5721964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 5722957153fcSJan Kara iput(inode); 5723957153fcSJan Kara return err; 572421f97697SJan Kara out: 5725ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5726ca0e05e4SDmitry Monakhov } 5727ca0e05e4SDmitry Monakhov 5728ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5729ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5730ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5731ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5732617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5733ac27a0ecSDave Kleikamp size_t len, loff_t off) 5734ac27a0ecSDave Kleikamp { 5735ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5736725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5737ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5738ac27a0ecSDave Kleikamp int tocopy; 5739ac27a0ecSDave Kleikamp size_t toread; 5740ac27a0ecSDave Kleikamp struct buffer_head *bh; 5741ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5742ac27a0ecSDave Kleikamp 5743ac27a0ecSDave Kleikamp if (off > i_size) 5744ac27a0ecSDave Kleikamp return 0; 5745ac27a0ecSDave Kleikamp if (off+len > i_size) 5746ac27a0ecSDave Kleikamp len = i_size-off; 5747ac27a0ecSDave Kleikamp toread = len; 5748ac27a0ecSDave Kleikamp while (toread > 0) { 5749ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5750ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 57511c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 57521c215028STheodore Ts'o if (IS_ERR(bh)) 57531c215028STheodore Ts'o return PTR_ERR(bh); 5754ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5755ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5756ac27a0ecSDave Kleikamp else 5757ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5758ac27a0ecSDave Kleikamp brelse(bh); 5759ac27a0ecSDave Kleikamp offset = 0; 5760ac27a0ecSDave Kleikamp toread -= tocopy; 5761ac27a0ecSDave Kleikamp data += tocopy; 5762ac27a0ecSDave Kleikamp blk++; 5763ac27a0ecSDave Kleikamp } 5764ac27a0ecSDave Kleikamp return len; 5765ac27a0ecSDave Kleikamp } 5766ac27a0ecSDave Kleikamp 5767ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5768ac27a0ecSDave Kleikamp * enough credits) */ 5769617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5770ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5771ac27a0ecSDave Kleikamp { 5772ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5773725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 57741c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5775c5e298aeSTheodore Ts'o int retries = 0; 5776ac27a0ecSDave Kleikamp struct buffer_head *bh; 5777ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5778ac27a0ecSDave Kleikamp 57790390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5780b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5781b31e1552SEric Sandeen " cancelled because transaction is not started", 57829c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 57839c3013e9SJan Kara return -EIO; 57849c3013e9SJan Kara } 578567eeb568SDmitry Monakhov /* 578667eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 578767eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 578867eeb568SDmitry Monakhov */ 578967eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 579067eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 579167eeb568SDmitry Monakhov " cancelled because not block aligned", 579267eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 579367eeb568SDmitry Monakhov return -EIO; 579467eeb568SDmitry Monakhov } 579567eeb568SDmitry Monakhov 5796c5e298aeSTheodore Ts'o do { 5797c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 5798c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 5799c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 5800c5e298aeSTheodore Ts'o } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && 5801c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 58021c215028STheodore Ts'o if (IS_ERR(bh)) 58031c215028STheodore Ts'o return PTR_ERR(bh); 5804ac27a0ecSDave Kleikamp if (!bh) 5805ac27a0ecSDave Kleikamp goto out; 58065d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5807617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5808ac27a0ecSDave Kleikamp if (err) { 5809ac27a0ecSDave Kleikamp brelse(bh); 58101c215028STheodore Ts'o return err; 5811ac27a0ecSDave Kleikamp } 5812ac27a0ecSDave Kleikamp lock_buffer(bh); 581367eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5814ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5815ac27a0ecSDave Kleikamp unlock_buffer(bh); 58160390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5817ac27a0ecSDave Kleikamp brelse(bh); 5818ac27a0ecSDave Kleikamp out: 581967eeb568SDmitry Monakhov if (inode->i_size < off + len) { 582067eeb568SDmitry Monakhov i_size_write(inode, off + len); 5821617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5822617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 582321f97697SJan Kara } 582467eeb568SDmitry Monakhov return len; 5825ac27a0ecSDave Kleikamp } 5826ac27a0ecSDave Kleikamp 58278f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid) 58288f0e8746STheodore Ts'o { 58298f0e8746STheodore Ts'o const struct quota_format_ops *ops; 58308f0e8746STheodore Ts'o 58318f0e8746STheodore Ts'o if (!sb_has_quota_loaded(sb, qid->type)) 58328f0e8746STheodore Ts'o return -ESRCH; 58338f0e8746STheodore Ts'o ops = sb_dqopt(sb)->ops[qid->type]; 58348f0e8746STheodore Ts'o if (!ops || !ops->get_next_id) 58358f0e8746STheodore Ts'o return -ENOSYS; 58368f0e8746STheodore Ts'o return dquot_get_next_id(sb, qid); 58378f0e8746STheodore Ts'o } 5838ac27a0ecSDave Kleikamp #endif 5839ac27a0ecSDave Kleikamp 5840152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5841152a0836SAl Viro const char *dev_name, void *data) 5842ac27a0ecSDave Kleikamp { 5843152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5844ac27a0ecSDave Kleikamp } 5845ac27a0ecSDave Kleikamp 5846c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 584724b58424STheodore Ts'o static inline void register_as_ext2(void) 584824b58424STheodore Ts'o { 584924b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 585024b58424STheodore Ts'o if (err) 585124b58424STheodore Ts'o printk(KERN_WARNING 585224b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 585324b58424STheodore Ts'o } 585424b58424STheodore Ts'o 585524b58424STheodore Ts'o static inline void unregister_as_ext2(void) 585624b58424STheodore Ts'o { 585724b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 585824b58424STheodore Ts'o } 58592035e776STheodore Ts'o 58602035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 58612035e776STheodore Ts'o { 5862e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 58632035e776STheodore Ts'o return 0; 5864bc98a42cSDavid Howells if (sb_rdonly(sb)) 58652035e776STheodore Ts'o return 1; 5866e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 58672035e776STheodore Ts'o return 0; 58682035e776STheodore Ts'o return 1; 58692035e776STheodore Ts'o } 587024b58424STheodore Ts'o #else 587124b58424STheodore Ts'o static inline void register_as_ext2(void) { } 587224b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 58732035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 587424b58424STheodore Ts'o #endif 587524b58424STheodore Ts'o 587624b58424STheodore Ts'o static inline void register_as_ext3(void) 587724b58424STheodore Ts'o { 587824b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 587924b58424STheodore Ts'o if (err) 588024b58424STheodore Ts'o printk(KERN_WARNING 588124b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 588224b58424STheodore Ts'o } 588324b58424STheodore Ts'o 588424b58424STheodore Ts'o static inline void unregister_as_ext3(void) 588524b58424STheodore Ts'o { 588624b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 588724b58424STheodore Ts'o } 58882035e776STheodore Ts'o 58892035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 58902035e776STheodore Ts'o { 5891e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 58922035e776STheodore Ts'o return 0; 5893e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 58942035e776STheodore Ts'o return 0; 5895bc98a42cSDavid Howells if (sb_rdonly(sb)) 58962035e776STheodore Ts'o return 1; 5897e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 58982035e776STheodore Ts'o return 0; 58992035e776STheodore Ts'o return 1; 59002035e776STheodore Ts'o } 590124b58424STheodore Ts'o 590203010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5903ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 590403010a33STheodore Ts'o .name = "ext4", 5905152a0836SAl Viro .mount = ext4_mount, 5906ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5907ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5908ac27a0ecSDave Kleikamp }; 59097f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5910ac27a0ecSDave Kleikamp 5911e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5912e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5913e9e3bcecSEric Sandeen 59145dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5915ac27a0ecSDave Kleikamp { 5916e9e3bcecSEric Sandeen int i, err; 5917c9de560dSAlex Tomas 5918e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 591907c0c5d8SAl Viro ext4_li_info = NULL; 592007c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 592107c0c5d8SAl Viro 59229a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 592312e9b892SDmitry Monakhov ext4_check_flag_values(); 5924e9e3bcecSEric Sandeen 5925e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 5926e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5927e9e3bcecSEric Sandeen 592851865fdaSZheng Liu err = ext4_init_es(); 59296fd058f7STheodore Ts'o if (err) 59306fd058f7STheodore Ts'o return err; 593151865fdaSZheng Liu 593251865fdaSZheng Liu err = ext4_init_pageio(); 593351865fdaSZheng Liu if (err) 5934b5799018STheodore Ts'o goto out5; 593551865fdaSZheng Liu 59365dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5937bd2d0210STheodore Ts'o if (err) 5938b5799018STheodore Ts'o goto out4; 5939857ac889SLukas Czerner 5940b5799018STheodore Ts'o err = ext4_init_sysfs(); 5941dd68314cSTheodore Ts'o if (err) 5942b5799018STheodore Ts'o goto out3; 5943857ac889SLukas Czerner 59445dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5945ac27a0ecSDave Kleikamp if (err) 5946c9de560dSAlex Tomas goto out2; 5947ac27a0ecSDave Kleikamp err = init_inodecache(); 5948ac27a0ecSDave Kleikamp if (err) 5949ac27a0ecSDave Kleikamp goto out1; 595024b58424STheodore Ts'o register_as_ext3(); 59512035e776STheodore Ts'o register_as_ext2(); 595203010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5953ac27a0ecSDave Kleikamp if (err) 5954ac27a0ecSDave Kleikamp goto out; 5955bfff6873SLukas Czerner 5956ac27a0ecSDave Kleikamp return 0; 5957ac27a0ecSDave Kleikamp out: 595824b58424STheodore Ts'o unregister_as_ext2(); 595924b58424STheodore Ts'o unregister_as_ext3(); 5960ac27a0ecSDave Kleikamp destroy_inodecache(); 5961ac27a0ecSDave Kleikamp out1: 59625dabfc78STheodore Ts'o ext4_exit_mballoc(); 59639c191f70ST Makphaibulchoke out2: 5964b5799018STheodore Ts'o ext4_exit_sysfs(); 5965b5799018STheodore Ts'o out3: 5966dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5967b5799018STheodore Ts'o out4: 59685dabfc78STheodore Ts'o ext4_exit_pageio(); 5969b5799018STheodore Ts'o out5: 597051865fdaSZheng Liu ext4_exit_es(); 597151865fdaSZheng Liu 5972ac27a0ecSDave Kleikamp return err; 5973ac27a0ecSDave Kleikamp } 5974ac27a0ecSDave Kleikamp 59755dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5976ac27a0ecSDave Kleikamp { 5977bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 597824b58424STheodore Ts'o unregister_as_ext2(); 597924b58424STheodore Ts'o unregister_as_ext3(); 598003010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5981ac27a0ecSDave Kleikamp destroy_inodecache(); 59825dabfc78STheodore Ts'o ext4_exit_mballoc(); 5983b5799018STheodore Ts'o ext4_exit_sysfs(); 59845dabfc78STheodore Ts'o ext4_exit_system_zone(); 59855dabfc78STheodore Ts'o ext4_exit_pageio(); 5986dd12ed14SEric Sandeen ext4_exit_es(); 5987ac27a0ecSDave Kleikamp } 5988ac27a0ecSDave Kleikamp 5989ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 599083982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5991ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 59927ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 59935dabfc78STheodore Ts'o module_init(ext4_init_fs) 59945dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5995