1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 24ac27a0ecSDave Kleikamp #include <linux/slab.h> 25ac27a0ecSDave Kleikamp #include <linux/init.h> 26ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 2766114cadSTejun Heo #include <linux/backing-dev.h> 28ac27a0ecSDave Kleikamp #include <linux/parser.h> 29ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 373197ebdbSTheodore Ts'o #include <linux/ctype.h> 381330593eSVignesh Babu #include <linux/log2.h> 39717d50e4SAndreas Dilger #include <linux/crc16.h> 40ef510424SDan Williams #include <linux/dax.h> 417abc52c2SDan Magenheimer #include <linux/cleancache.h> 427c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 43ac27a0ecSDave Kleikamp 44bfff6873SLukas Czerner #include <linux/kthread.h> 45bfff6873SLukas Czerner #include <linux/freezer.h> 46bfff6873SLukas Czerner 473dcf5451SChristoph Hellwig #include "ext4.h" 484a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 493dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 50ac27a0ecSDave Kleikamp #include "xattr.h" 51ac27a0ecSDave Kleikamp #include "acl.h" 523661d286STheodore Ts'o #include "mballoc.h" 530c9ec4beSDarrick J. Wong #include "fsmap.h" 54ac27a0ecSDave Kleikamp 559bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 569bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 579bffad1eSTheodore Ts'o 580b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 590b75a840SLukas Czerner static struct mutex ext4_li_mtx; 60e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 619f6200bbSTheodore Ts'o 62617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 63ac27a0ecSDave Kleikamp unsigned long journal_devnum); 642adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 65e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 66617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 67617ba13bSMingming Cao struct ext4_super_block *es); 68617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 69617ba13bSMingming Cao struct ext4_super_block *es); 70617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 71617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 72617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 73c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 74c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 75152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 76152a0836SAl Viro const char *dev_name, void *data); 772035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 782035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 79d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 80bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 81bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 828f1f7453SEric Sandeen static void ext4_clear_request_list(void); 83c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 84c6cb7e77SEric Whitney unsigned int journal_inum); 85ac27a0ecSDave Kleikamp 86e74031fdSJan Kara /* 87e74031fdSJan Kara * Lock ordering 88e74031fdSJan Kara * 89e74031fdSJan Kara * Note the difference between i_mmap_sem (EXT4_I(inode)->i_mmap_sem) and 90e74031fdSJan Kara * i_mmap_rwsem (inode->i_mmap_rwsem)! 91e74031fdSJan Kara * 92e74031fdSJan Kara * page fault path: 93e74031fdSJan Kara * mmap_sem -> sb_start_pagefault -> i_mmap_sem (r) -> transaction start -> 94e74031fdSJan Kara * page lock -> i_data_sem (rw) 95e74031fdSJan Kara * 96e74031fdSJan Kara * buffered write path: 97e74031fdSJan Kara * sb_start_write -> i_mutex -> mmap_sem 98e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 99e74031fdSJan Kara * i_data_sem (rw) 100e74031fdSJan Kara * 101e74031fdSJan Kara * truncate: 102e74031fdSJan Kara * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) -> 103e74031fdSJan Kara * i_mmap_rwsem (w) -> page lock 104e74031fdSJan Kara * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) -> 105e74031fdSJan Kara * transaction start -> i_data_sem (rw) 106e74031fdSJan Kara * 107e74031fdSJan Kara * direct IO: 108e74031fdSJan Kara * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) -> mmap_sem 109e74031fdSJan Kara * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) -> 110e74031fdSJan Kara * 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 { 408ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 409ac27a0ecSDave Kleikamp return; 410ac27a0ecSDave Kleikamp 411ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 412617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 413ac27a0ecSDave Kleikamp 4144ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 415ac27a0ecSDave Kleikamp if (journal) 416dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 417ac27a0ecSDave Kleikamp } 418ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 419b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 4204418e141SDmitry Monakhov /* 4214418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 4224418e141SDmitry Monakhov * before ->s_flags update 4234418e141SDmitry Monakhov */ 4244418e141SDmitry Monakhov smp_wmb(); 425ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 426ac27a0ecSDave Kleikamp } 4274327ba52SDaeho Jeong if (test_opt(sb, ERRORS_PANIC)) { 4284327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 4294327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 4304327ba52SDaeho Jeong return; 431617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 432ac27a0ecSDave Kleikamp sb->s_id); 433ac27a0ecSDave Kleikamp } 4344327ba52SDaeho Jeong } 435ac27a0ecSDave Kleikamp 436efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 437efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 438efbed4dcSTheodore Ts'o "EXT4-fs error") 439efbed4dcSTheodore Ts'o 44012062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 441c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 442ac27a0ecSDave Kleikamp { 4430ff2ea7dSJoe Perches struct va_format vaf; 444ac27a0ecSDave Kleikamp va_list args; 445ac27a0ecSDave Kleikamp 4460db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 4470db1ff22STheodore Ts'o return; 4480db1ff22STheodore Ts'o 449efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 450ac27a0ecSDave Kleikamp va_start(args, fmt); 4510ff2ea7dSJoe Perches vaf.fmt = fmt; 4520ff2ea7dSJoe Perches vaf.va = &args; 453efbed4dcSTheodore Ts'o printk(KERN_CRIT 454efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4550ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 456ac27a0ecSDave Kleikamp va_end(args); 457efbed4dcSTheodore Ts'o } 458f3fc0210STheodore Ts'o save_error_info(sb, function, line); 459617ba13bSMingming Cao ext4_handle_error(sb); 460ac27a0ecSDave Kleikamp } 461ac27a0ecSDave Kleikamp 462e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 463c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 464273df556SFrank Mayhar const char *fmt, ...) 465273df556SFrank Mayhar { 466273df556SFrank Mayhar va_list args; 467f7c21177STheodore Ts'o struct va_format vaf; 4681c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 469273df556SFrank Mayhar 4700db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 4710db1ff22STheodore Ts'o return; 4720db1ff22STheodore Ts'o 4731c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4741c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 475efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 476273df556SFrank Mayhar va_start(args, fmt); 477f7c21177STheodore Ts'o vaf.fmt = fmt; 478f7c21177STheodore Ts'o vaf.va = &args; 479c398eda0STheodore Ts'o if (block) 480d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 481d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 482d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 483d9ee81daSJoe Perches block, current->comm, &vaf); 484d9ee81daSJoe Perches else 485d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 486d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 487d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 488d9ee81daSJoe Perches current->comm, &vaf); 489273df556SFrank Mayhar va_end(args); 490efbed4dcSTheodore Ts'o } 491efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 492273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 493273df556SFrank Mayhar } 494273df556SFrank Mayhar 495e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 496f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 497f7c21177STheodore Ts'o const char *fmt, ...) 498273df556SFrank Mayhar { 499273df556SFrank Mayhar va_list args; 500f7c21177STheodore Ts'o struct va_format vaf; 5011c13d5c0STheodore Ts'o struct ext4_super_block *es; 502496ad9aaSAl Viro struct inode *inode = file_inode(file); 503273df556SFrank Mayhar char pathname[80], *path; 504273df556SFrank Mayhar 5050db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 5060db1ff22STheodore Ts'o return; 5070db1ff22STheodore Ts'o 5081c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 5091c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 510efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 5119bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 512f9a62d09SDan Carpenter if (IS_ERR(path)) 513273df556SFrank Mayhar path = "(unknown)"; 514f7c21177STheodore Ts'o va_start(args, fmt); 515f7c21177STheodore Ts'o vaf.fmt = fmt; 516f7c21177STheodore Ts'o vaf.va = &args; 517d9ee81daSJoe Perches if (block) 518d9ee81daSJoe Perches printk(KERN_CRIT 519d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 520d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 521d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 522d9ee81daSJoe Perches block, current->comm, path, &vaf); 523d9ee81daSJoe Perches else 524d9ee81daSJoe Perches printk(KERN_CRIT 525d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 526d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 527d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 528d9ee81daSJoe Perches current->comm, path, &vaf); 529273df556SFrank Mayhar va_end(args); 530efbed4dcSTheodore Ts'o } 531efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 532273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 533273df556SFrank Mayhar } 534273df556SFrank Mayhar 535722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 536ac27a0ecSDave Kleikamp char nbuf[16]) 537ac27a0ecSDave Kleikamp { 538ac27a0ecSDave Kleikamp char *errstr = NULL; 539ac27a0ecSDave Kleikamp 540ac27a0ecSDave Kleikamp switch (errno) { 5416a797d27SDarrick J. Wong case -EFSCORRUPTED: 5426a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 5436a797d27SDarrick J. Wong break; 5446a797d27SDarrick J. Wong case -EFSBADCRC: 5456a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 5466a797d27SDarrick J. Wong break; 547ac27a0ecSDave Kleikamp case -EIO: 548ac27a0ecSDave Kleikamp errstr = "IO failure"; 549ac27a0ecSDave Kleikamp break; 550ac27a0ecSDave Kleikamp case -ENOMEM: 551ac27a0ecSDave Kleikamp errstr = "Out of memory"; 552ac27a0ecSDave Kleikamp break; 553ac27a0ecSDave Kleikamp case -EROFS: 55478f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 55578f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 556ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 557ac27a0ecSDave Kleikamp else 558ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 559ac27a0ecSDave Kleikamp break; 560ac27a0ecSDave Kleikamp default: 561ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 562ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 563ac27a0ecSDave Kleikamp * NULL. */ 564ac27a0ecSDave Kleikamp if (nbuf) { 565ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 566ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 567ac27a0ecSDave Kleikamp errstr = nbuf; 568ac27a0ecSDave Kleikamp } 569ac27a0ecSDave Kleikamp break; 570ac27a0ecSDave Kleikamp } 571ac27a0ecSDave Kleikamp 572ac27a0ecSDave Kleikamp return errstr; 573ac27a0ecSDave Kleikamp } 574ac27a0ecSDave Kleikamp 575617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 576ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 577ac27a0ecSDave Kleikamp 578c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 579c398eda0STheodore Ts'o unsigned int line, int errno) 580ac27a0ecSDave Kleikamp { 581ac27a0ecSDave Kleikamp char nbuf[16]; 582ac27a0ecSDave Kleikamp const char *errstr; 583ac27a0ecSDave Kleikamp 5840db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 5850db1ff22STheodore Ts'o return; 5860db1ff22STheodore Ts'o 587ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 588ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 589ac27a0ecSDave Kleikamp * an error. */ 590ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 591ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 592ac27a0ecSDave Kleikamp return; 593ac27a0ecSDave Kleikamp 594efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 595617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 596c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 597c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 598efbed4dcSTheodore Ts'o } 599ac27a0ecSDave Kleikamp 600efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 601617ba13bSMingming Cao ext4_handle_error(sb); 602ac27a0ecSDave Kleikamp } 603ac27a0ecSDave Kleikamp 604ac27a0ecSDave Kleikamp /* 605617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 606ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 607ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 608ac27a0ecSDave Kleikamp * 609ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 610ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 611ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 612ac27a0ecSDave Kleikamp */ 613ac27a0ecSDave Kleikamp 614c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 615c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 616ac27a0ecSDave Kleikamp { 617651e1c3bSJoe Perches struct va_format vaf; 618ac27a0ecSDave Kleikamp va_list args; 619ac27a0ecSDave Kleikamp 6200db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 6210db1ff22STheodore Ts'o return; 6220db1ff22STheodore Ts'o 6231c13d5c0STheodore Ts'o save_error_info(sb, function, line); 624ac27a0ecSDave Kleikamp va_start(args, fmt); 625651e1c3bSJoe Perches vaf.fmt = fmt; 626651e1c3bSJoe Perches vaf.va = &args; 627651e1c3bSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: %pV\n", 628651e1c3bSJoe Perches sb->s_id, function, line, &vaf); 629ac27a0ecSDave Kleikamp va_end(args); 630ac27a0ecSDave Kleikamp 6311c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 632b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 6334ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 6344418e141SDmitry Monakhov /* 6354418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 6364418e141SDmitry Monakhov * before ->s_flags update 6374418e141SDmitry Monakhov */ 6384418e141SDmitry Monakhov smp_wmb(); 6394418e141SDmitry Monakhov sb->s_flags |= MS_RDONLY; 640ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 641dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 6421c13d5c0STheodore Ts'o save_error_info(sb, function, line); 6431c13d5c0STheodore Ts'o } 6444327ba52SDaeho Jeong if (test_opt(sb, ERRORS_PANIC)) { 6454327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 6464327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 6474327ba52SDaeho Jeong return; 6481c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 649ac27a0ecSDave Kleikamp } 6504327ba52SDaeho Jeong } 651ac27a0ecSDave Kleikamp 652e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 653e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 654b31e1552SEric Sandeen { 6550ff2ea7dSJoe Perches struct va_format vaf; 656b31e1552SEric Sandeen va_list args; 657b31e1552SEric Sandeen 658efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 659efbed4dcSTheodore Ts'o return; 660efbed4dcSTheodore Ts'o 661b31e1552SEric Sandeen va_start(args, fmt); 6620ff2ea7dSJoe Perches vaf.fmt = fmt; 6630ff2ea7dSJoe Perches vaf.va = &args; 6640ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 665b31e1552SEric Sandeen va_end(args); 666b31e1552SEric Sandeen } 667b31e1552SEric Sandeen 668b03a2f7eSAndreas Dilger #define ext4_warning_ratelimit(sb) \ 669b03a2f7eSAndreas Dilger ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ 670b03a2f7eSAndreas Dilger "EXT4-fs warning") 671b03a2f7eSAndreas Dilger 67212062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 673c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 674ac27a0ecSDave Kleikamp { 6750ff2ea7dSJoe Perches struct va_format vaf; 676ac27a0ecSDave Kleikamp va_list args; 677ac27a0ecSDave Kleikamp 678b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 679efbed4dcSTheodore Ts'o return; 680efbed4dcSTheodore Ts'o 681ac27a0ecSDave Kleikamp va_start(args, fmt); 6820ff2ea7dSJoe Perches vaf.fmt = fmt; 6830ff2ea7dSJoe Perches vaf.va = &args; 6840ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6850ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 686ac27a0ecSDave Kleikamp va_end(args); 687ac27a0ecSDave Kleikamp } 688ac27a0ecSDave Kleikamp 689b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 690b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 691b03a2f7eSAndreas Dilger { 692b03a2f7eSAndreas Dilger struct va_format vaf; 693b03a2f7eSAndreas Dilger va_list args; 694b03a2f7eSAndreas Dilger 695b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 696b03a2f7eSAndreas Dilger return; 697b03a2f7eSAndreas Dilger 698b03a2f7eSAndreas Dilger va_start(args, fmt); 699b03a2f7eSAndreas Dilger vaf.fmt = fmt; 700b03a2f7eSAndreas Dilger vaf.va = &args; 701b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 702b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 703b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 704b03a2f7eSAndreas Dilger va_end(args); 705b03a2f7eSAndreas Dilger } 706b03a2f7eSAndreas Dilger 707e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 708e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 709e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 710e29136f8STheodore Ts'o const char *fmt, ...) 7115d1b1b3fSAneesh Kumar K.V __releases(bitlock) 7125d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 7135d1b1b3fSAneesh Kumar K.V { 7140ff2ea7dSJoe Perches struct va_format vaf; 7155d1b1b3fSAneesh Kumar K.V va_list args; 7165d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 7175d1b1b3fSAneesh Kumar K.V 7180db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7190db1ff22STheodore Ts'o return; 7200db1ff22STheodore Ts'o 7211c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 7221c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 7231c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 7240ff2ea7dSJoe Perches 725efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 7265d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 7270ff2ea7dSJoe Perches vaf.fmt = fmt; 7280ff2ea7dSJoe Perches vaf.va = &args; 72921149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 730e29136f8STheodore Ts'o sb->s_id, function, line, grp); 731e29136f8STheodore Ts'o if (ino) 7320ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 733e29136f8STheodore Ts'o if (block) 734efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 735efbed4dcSTheodore Ts'o (unsigned long long) block); 7360ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 7375d1b1b3fSAneesh Kumar K.V va_end(args); 738efbed4dcSTheodore Ts'o } 7395d1b1b3fSAneesh Kumar K.V 7405d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 741e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 7425d1b1b3fSAneesh Kumar K.V return; 7435d1b1b3fSAneesh Kumar K.V } 7441c13d5c0STheodore Ts'o 7455d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 7465d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 7475d1b1b3fSAneesh Kumar K.V /* 7485d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 7495d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 7505d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 7515d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 7525d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 75325985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 7545d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 7555d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 7565d1b1b3fSAneesh Kumar K.V * more appropriate error code. 7575d1b1b3fSAneesh Kumar K.V */ 7585d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 7595d1b1b3fSAneesh Kumar K.V return; 7605d1b1b3fSAneesh Kumar K.V } 7615d1b1b3fSAneesh Kumar K.V 762617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 763ac27a0ecSDave Kleikamp { 764617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 765ac27a0ecSDave Kleikamp 766617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 767ac27a0ecSDave Kleikamp return; 768ac27a0ecSDave Kleikamp 76912062dddSEric Sandeen ext4_warning(sb, 770ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 771ac27a0ecSDave Kleikamp "running e2fsck is recommended", 772617ba13bSMingming Cao EXT4_DYNAMIC_REV); 773ac27a0ecSDave Kleikamp 774617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 775617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 776617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 777ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 778ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 779ac27a0ecSDave Kleikamp 780ac27a0ecSDave Kleikamp /* 781ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 782ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 783ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 784ac27a0ecSDave Kleikamp */ 785ac27a0ecSDave Kleikamp } 786ac27a0ecSDave Kleikamp 787ac27a0ecSDave Kleikamp /* 788ac27a0ecSDave Kleikamp * Open the external journal device 789ac27a0ecSDave Kleikamp */ 790b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 791ac27a0ecSDave Kleikamp { 792ac27a0ecSDave Kleikamp struct block_device *bdev; 793ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 794ac27a0ecSDave Kleikamp 795d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 796ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 797ac27a0ecSDave Kleikamp goto fail; 798ac27a0ecSDave Kleikamp return bdev; 799ac27a0ecSDave Kleikamp 800ac27a0ecSDave Kleikamp fail: 801b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 802ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 803ac27a0ecSDave Kleikamp return NULL; 804ac27a0ecSDave Kleikamp } 805ac27a0ecSDave Kleikamp 806ac27a0ecSDave Kleikamp /* 807ac27a0ecSDave Kleikamp * Release the journal device 808ac27a0ecSDave Kleikamp */ 8094385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 810ac27a0ecSDave Kleikamp { 8114385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 812ac27a0ecSDave Kleikamp } 813ac27a0ecSDave Kleikamp 8144385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 815ac27a0ecSDave Kleikamp { 816ac27a0ecSDave Kleikamp struct block_device *bdev; 817ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 818ac27a0ecSDave Kleikamp if (bdev) { 8194385bab1SAl Viro ext4_blkdev_put(bdev); 820ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 821ac27a0ecSDave Kleikamp } 822ac27a0ecSDave Kleikamp } 823ac27a0ecSDave Kleikamp 824ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 825ac27a0ecSDave Kleikamp { 826617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 827ac27a0ecSDave Kleikamp } 828ac27a0ecSDave Kleikamp 829617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 830ac27a0ecSDave Kleikamp { 831ac27a0ecSDave Kleikamp struct list_head *l; 832ac27a0ecSDave Kleikamp 833b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 834ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 835ac27a0ecSDave Kleikamp 836ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 837ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 838ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 839ac27a0ecSDave Kleikamp printk(KERN_ERR " " 840ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 841ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 842ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 843ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 844ac27a0ecSDave Kleikamp } 845ac27a0ecSDave Kleikamp } 846ac27a0ecSDave Kleikamp 847957153fcSJan Kara #ifdef CONFIG_QUOTA 848957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 849957153fcSJan Kara 850957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 851957153fcSJan Kara { 852957153fcSJan Kara int type; 853957153fcSJan Kara 854957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 855957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 856957153fcSJan Kara ext4_quota_off(sb, type); 857957153fcSJan Kara } 858957153fcSJan Kara #else 859957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 860957153fcSJan Kara { 861957153fcSJan Kara } 862957153fcSJan Kara #endif 863957153fcSJan Kara 864617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 865ac27a0ecSDave Kleikamp { 866617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 867617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 86897abd7d4STheodore Ts'o int aborted = 0; 869ef2cabf7SHidehiro Kawai int i, err; 870ac27a0ecSDave Kleikamp 871857ac889SLukas Czerner ext4_unregister_li_request(sb); 872957153fcSJan Kara ext4_quota_off_umount(sb); 873e0ccfd95SChristoph Hellwig 8742e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 8752e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 8764c0425ffSMingming Cao 8770390131bSFrank Mayhar if (sbi->s_journal) { 87897abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 879ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 88047b4a50bSJan Kara sbi->s_journal = NULL; 88197abd7d4STheodore Ts'o if ((err < 0) && !aborted) 882c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 8830390131bSFrank Mayhar } 884d4edac31SJosef Bacik 885ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 886d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 8879105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 888d4edac31SJosef Bacik ext4_release_system_zone(sb); 889d4edac31SJosef Bacik ext4_mb_release(sb); 890d4edac31SJosef Bacik ext4_ext_release(sb); 891d4edac31SJosef Bacik 89297abd7d4STheodore Ts'o if (!(sb->s_flags & MS_RDONLY) && !aborted) { 893e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 894ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 895ac27a0ecSDave Kleikamp } 89658c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 897a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 898a8e25a83SArtem Bityutskiy 899ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 900ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 901b93b41d4SAl Viro kvfree(sbi->s_group_desc); 902b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 90357042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 904ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 905ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 90657042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 907c8585c6fSDaeho Jeong percpu_free_rwsem(&sbi->s_journal_flag_rwsem); 908ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 909a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 910ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 911ac27a0ecSDave Kleikamp #endif 912ac27a0ecSDave Kleikamp 913ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 914ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 915ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 916ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 917ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 918ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 919ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 920ac27a0ecSDave Kleikamp 92189d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 922f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 923ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 924ac27a0ecSDave Kleikamp /* 925ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 926ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 927ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 928ac27a0ecSDave Kleikamp */ 929ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 930f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 931617ba13bSMingming Cao ext4_blkdev_remove(sbi); 932ac27a0ecSDave Kleikamp } 933dec214d0STahsin Erdogan if (sbi->s_ea_inode_cache) { 934dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 935dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 936dec214d0STahsin Erdogan } 93747387409STahsin Erdogan if (sbi->s_ea_block_cache) { 93847387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 93947387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 9409c191f70ST Makphaibulchoke } 941c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 942c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 9439060dd2cSEric Sandeen brelse(sbi->s_sbh); 944ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 9453197ebdbSTheodore Ts'o /* 9463197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 9473197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 9483197ebdbSTheodore Ts'o */ 9493197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 9503197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 9510441984aSDarrick J. Wong if (sbi->s_chksum_driver) 9520441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 953705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 954*5e405595SDan Williams fs_put_dax(sbi->s_daxdev); 955ac27a0ecSDave Kleikamp kfree(sbi); 956ac27a0ecSDave Kleikamp } 957ac27a0ecSDave Kleikamp 958e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 959ac27a0ecSDave Kleikamp 960ac27a0ecSDave Kleikamp /* 961ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 962ac27a0ecSDave Kleikamp */ 963617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 964ac27a0ecSDave Kleikamp { 965617ba13bSMingming Cao struct ext4_inode_info *ei; 966ac27a0ecSDave Kleikamp 967e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 968ac27a0ecSDave Kleikamp if (!ei) 969ac27a0ecSDave Kleikamp return NULL; 9700b8e58a1SAndreas Dilger 971ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 972202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 973c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 974c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 9759a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 9769a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 977edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 978eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 979edaa53caSZheng Liu ei->i_es_shk_nr = 0; 980dd475925SJan Kara ei->i_es_shrink_lblk = 0; 981d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 9829d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 9837e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 984d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 985a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 986a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 98796c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 988a9e7f447SDmitry Monakhov #endif 9898aefcd55STheodore Ts'o ei->jinode = NULL; 9902e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 991744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 992b436b9beSJan Kara ei->i_sync_tid = 0; 993b436b9beSJan Kara ei->i_datasync_tid = 0; 994e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 9952e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 996ac27a0ecSDave Kleikamp return &ei->vfs_inode; 997ac27a0ecSDave Kleikamp } 998ac27a0ecSDave Kleikamp 9997ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 10007ff9c073STheodore Ts'o { 10017ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 10027ff9c073STheodore Ts'o 10037ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 10047ff9c073STheodore Ts'o return drop; 10057ff9c073STheodore Ts'o } 10067ff9c073STheodore Ts'o 1007fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 1008fa0d7e3dSNick Piggin { 1009fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 1010fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1011fa0d7e3dSNick Piggin } 1012fa0d7e3dSNick Piggin 1013617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1014ac27a0ecSDave Kleikamp { 10159f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1016b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1017b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1018b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 10199f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 10209f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 10219f7dd93dSVasily Averin true); 10229f7dd93dSVasily Averin dump_stack(); 10239f7dd93dSVasily Averin } 1024fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 1025ac27a0ecSDave Kleikamp } 1026ac27a0ecSDave Kleikamp 102751cc5068SAlexey Dobriyan static void init_once(void *foo) 1028ac27a0ecSDave Kleikamp { 1029617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1030ac27a0ecSDave Kleikamp 1031ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1032ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 10330e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1034ea3d7209SJan Kara init_rwsem(&ei->i_mmap_sem); 1035ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1036ac27a0ecSDave Kleikamp } 1037ac27a0ecSDave Kleikamp 1038e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1039ac27a0ecSDave Kleikamp { 1040617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 1041617ba13bSMingming Cao sizeof(struct ext4_inode_info), 1042ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 10435d097056SVladimir Davydov SLAB_MEM_SPREAD|SLAB_ACCOUNT), 104420c2df83SPaul Mundt init_once); 1045617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1046ac27a0ecSDave Kleikamp return -ENOMEM; 1047ac27a0ecSDave Kleikamp return 0; 1048ac27a0ecSDave Kleikamp } 1049ac27a0ecSDave Kleikamp 1050ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1051ac27a0ecSDave Kleikamp { 10528c0a8537SKirill A. Shutemov /* 10538c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 10548c0a8537SKirill A. Shutemov * destroy cache. 10558c0a8537SKirill A. Shutemov */ 10568c0a8537SKirill A. Shutemov rcu_barrier(); 1057617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1058ac27a0ecSDave Kleikamp } 1059ac27a0ecSDave Kleikamp 10600930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1061ac27a0ecSDave Kleikamp { 10620930fcc1SAl Viro invalidate_inode_buffers(inode); 1063dbd5768fSJan Kara clear_inode(inode); 10649f754758SChristoph Hellwig dquot_drop(inode); 1065c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 106651865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 10678aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 10688aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 10698aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 10708aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 10718aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 10728aefcd55STheodore Ts'o } 1073b7236e21STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 1074a7550b30SJaegeuk Kim fscrypt_put_encryption_info(inode, NULL); 1075b7236e21STheodore Ts'o #endif 1076ac27a0ecSDave Kleikamp } 1077ac27a0ecSDave Kleikamp 10781b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10791b961ac0SChristoph Hellwig u64 ino, u32 generation) 1080ac27a0ecSDave Kleikamp { 1081ac27a0ecSDave Kleikamp struct inode *inode; 1082ac27a0ecSDave Kleikamp 1083617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1084ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1085617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1086ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1087ac27a0ecSDave Kleikamp 1088ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1089ac27a0ecSDave Kleikamp * 1090617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1091ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1092ac27a0ecSDave Kleikamp * 1093ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1094ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1095ac27a0ecSDave Kleikamp */ 1096f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 10971d1fe1eeSDavid Howells if (IS_ERR(inode)) 10981d1fe1eeSDavid Howells return ERR_CAST(inode); 10991d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1100ac27a0ecSDave Kleikamp iput(inode); 1101ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1102ac27a0ecSDave Kleikamp } 11031b961ac0SChristoph Hellwig 11041b961ac0SChristoph Hellwig return inode; 1105ac27a0ecSDave Kleikamp } 11061b961ac0SChristoph Hellwig 11071b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 11081b961ac0SChristoph Hellwig int fh_len, int fh_type) 11091b961ac0SChristoph Hellwig { 11101b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 11111b961ac0SChristoph Hellwig ext4_nfs_get_inode); 11121b961ac0SChristoph Hellwig } 11131b961ac0SChristoph Hellwig 11141b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 11151b961ac0SChristoph Hellwig int fh_len, int fh_type) 11161b961ac0SChristoph Hellwig { 11171b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 11181b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1119ac27a0ecSDave Kleikamp } 1120ac27a0ecSDave Kleikamp 1121c39a7f84SToshiyuki Okajima /* 1122c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1123c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1124c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1125c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1126c39a7f84SToshiyuki Okajima */ 11270b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11280b8e58a1SAndreas Dilger gfp_t wait) 1129c39a7f84SToshiyuki Okajima { 1130c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1131c39a7f84SToshiyuki Okajima 1132c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1133c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1134c39a7f84SToshiyuki Okajima return 0; 1135c39a7f84SToshiyuki Okajima if (journal) 1136c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1137d0164adcSMel Gorman wait & ~__GFP_DIRECT_RECLAIM); 1138c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1139c39a7f84SToshiyuki Okajima } 1140c39a7f84SToshiyuki Okajima 1141a7550b30SJaegeuk Kim #ifdef CONFIG_EXT4_FS_ENCRYPTION 1142a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1143a7550b30SJaegeuk Kim { 1144a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1145a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1146a7550b30SJaegeuk Kim } 1147a7550b30SJaegeuk Kim 1148a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1149a7550b30SJaegeuk Kim void *fs_data) 1150a7550b30SJaegeuk Kim { 11512f8f5e76SEric Biggers handle_t *handle = fs_data; 1152c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1153a7550b30SJaegeuk Kim 11549ce0151aSEric Biggers /* 11559ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 11569ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 11579ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 11589ce0151aSEric Biggers * the filename "lost+found" itself. 11599ce0151aSEric Biggers */ 11609ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 11619ce0151aSEric Biggers return -EPERM; 1162a7550b30SJaegeuk Kim 116394840e3cSEric Biggers res = ext4_convert_inline_data(inode); 116494840e3cSEric Biggers if (res) 116594840e3cSEric Biggers return res; 116694840e3cSEric Biggers 11672f8f5e76SEric Biggers /* 11682f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 11692f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 11702f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 11712f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 11722f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 11732f8f5e76SEric Biggers */ 11742f8f5e76SEric Biggers 11752f8f5e76SEric Biggers if (handle) { 11762f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 11772f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 11782f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 11792f8f5e76SEric Biggers ctx, len, 0); 1180a7550b30SJaegeuk Kim if (!res) { 1181a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1182a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1183a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1184a3caa24bSJan Kara /* 1185a3caa24bSJan Kara * Update inode->i_flags - e.g. S_DAX may get disabled 1186a3caa24bSJan Kara */ 1187a3caa24bSJan Kara ext4_set_inode_flags(inode); 1188a7550b30SJaegeuk Kim } 1189a7550b30SJaegeuk Kim return res; 1190a7550b30SJaegeuk Kim } 1191a7550b30SJaegeuk Kim 1192b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1193b8cb5a54STahsin Erdogan if (res) 1194b8cb5a54STahsin Erdogan return res; 11952f8f5e76SEric Biggers retry: 1196af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1197af65207cSTahsin Erdogan &credits); 1198dec214d0STahsin Erdogan if (res) 1199dec214d0STahsin Erdogan return res; 1200dec214d0STahsin Erdogan 1201c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1202a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1203a7550b30SJaegeuk Kim return PTR_ERR(handle); 1204a7550b30SJaegeuk Kim 12052f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 12062f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 12072f8f5e76SEric Biggers ctx, len, 0); 1208a7550b30SJaegeuk Kim if (!res) { 1209a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1210a3caa24bSJan Kara /* Update inode->i_flags - e.g. S_DAX may get disabled */ 1211a3caa24bSJan Kara ext4_set_inode_flags(inode); 1212a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1213a7550b30SJaegeuk Kim if (res) 1214a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1215a7550b30SJaegeuk Kim } 1216a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 12172f8f5e76SEric Biggers 12182f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 12192f8f5e76SEric Biggers goto retry; 1220a7550b30SJaegeuk Kim if (!res) 1221a7550b30SJaegeuk Kim res = res2; 1222a7550b30SJaegeuk Kim return res; 1223a7550b30SJaegeuk Kim } 1224a7550b30SJaegeuk Kim 1225c250b7ddSEric Biggers static bool ext4_dummy_context(struct inode *inode) 1226a7550b30SJaegeuk Kim { 1227a7550b30SJaegeuk Kim return DUMMY_ENCRYPTION_ENABLED(EXT4_SB(inode->i_sb)); 1228a7550b30SJaegeuk Kim } 1229a7550b30SJaegeuk Kim 1230a7550b30SJaegeuk Kim static unsigned ext4_max_namelen(struct inode *inode) 1231a7550b30SJaegeuk Kim { 1232a7550b30SJaegeuk Kim return S_ISLNK(inode->i_mode) ? inode->i_sb->s_blocksize : 1233a7550b30SJaegeuk Kim EXT4_NAME_LEN; 1234a7550b30SJaegeuk Kim } 1235a7550b30SJaegeuk Kim 12366f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1237a5d431efSEric Biggers .key_prefix = "ext4:", 1238a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1239a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1240a7550b30SJaegeuk Kim .dummy_context = ext4_dummy_context, 1241a7550b30SJaegeuk Kim .is_encrypted = ext4_encrypted_inode, 1242a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1243a7550b30SJaegeuk Kim .max_namelen = ext4_max_namelen, 1244a7550b30SJaegeuk Kim }; 1245a7550b30SJaegeuk Kim #else 12466f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1247a7550b30SJaegeuk Kim .is_encrypted = ext4_encrypted_inode, 1248a7550b30SJaegeuk Kim }; 1249a7550b30SJaegeuk Kim #endif 1250a7550b30SJaegeuk Kim 1251ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1252d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1253689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1254ac27a0ecSDave Kleikamp 1255617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1256617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1257617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1258617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1259617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 12606f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 12618c54ca9cSAl Viro const struct path *path); 1262617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1263617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1264ac27a0ecSDave Kleikamp size_t len, loff_t off); 1265617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1266ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 12677c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 12687c319d32SAditya Kali unsigned int flags); 12697c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 12708f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid); 1271ac27a0ecSDave Kleikamp 127296c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 127396c7e0d9SJan Kara { 127496c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 127596c7e0d9SJan Kara } 127696c7e0d9SJan Kara 127761e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 127860e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1279617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1280617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1281617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1282617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1283a5b5ee32SJan Kara .write_info = ext4_write_info, 1284a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1285a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1286040cb378SLi Xi .get_projid = ext4_get_projid, 12877a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 12888f0e8746STheodore Ts'o .get_next_id = ext4_get_next_id, 1289ac27a0ecSDave Kleikamp }; 1290ac27a0ecSDave Kleikamp 12910d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1292617ba13bSMingming Cao .quota_on = ext4_quota_on, 1293ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1294287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 12950a240339SJan Kara .get_state = dquot_get_state, 1296287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1297287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 12986332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 12996332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1300ac27a0ecSDave Kleikamp }; 1301ac27a0ecSDave Kleikamp #endif 1302ac27a0ecSDave Kleikamp 1303ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1304617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1305617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1306617ba13bSMingming Cao .write_inode = ext4_write_inode, 1307617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 13087ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 13090930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1310617ba13bSMingming Cao .put_super = ext4_put_super, 1311617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1312c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1313c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1314617ba13bSMingming Cao .statfs = ext4_statfs, 1315617ba13bSMingming Cao .remount_fs = ext4_remount, 1316617ba13bSMingming Cao .show_options = ext4_show_options, 1317ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1318617ba13bSMingming Cao .quota_read = ext4_quota_read, 1319617ba13bSMingming Cao .quota_write = ext4_quota_write, 132096c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1321ac27a0ecSDave Kleikamp #endif 1322c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1323ac27a0ecSDave Kleikamp }; 1324ac27a0ecSDave Kleikamp 132539655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 13261b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 13271b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1328617ba13bSMingming Cao .get_parent = ext4_get_parent, 1329ac27a0ecSDave Kleikamp }; 1330ac27a0ecSDave Kleikamp 1331ac27a0ecSDave Kleikamp enum { 1332ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1333ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 133472578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1335ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 133672578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1337ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1338ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1339ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 13406ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 1341ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 13425a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1343ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 134449da9392SJan Kara Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax, 13451449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 1346670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 13471449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 13485328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1349744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1350fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1351cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 1352ac27a0ecSDave Kleikamp }; 1353ac27a0ecSDave Kleikamp 1354a447c093SSteven Whitehouse static const match_table_t tokens = { 1355ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1356ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1357ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1358ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1359ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1360ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1361ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1362ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1363ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1364ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1365ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1366ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1367ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1368ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 136972578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 137072578c33STheodore Ts'o {Opt_removed, "orlov"}, 1371ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1372ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1373ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1374ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1375e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 13765a916be1STheodore Ts'o {Opt_noload, "noload"}, 137772578c33STheodore Ts'o {Opt_removed, "nobh"}, 137872578c33STheodore Ts'o {Opt_removed, "bh"}, 1379ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 138030773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 138130773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1382ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1383ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1384818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1385c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1386818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1387ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1388ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1389ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1390ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 13915bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 13925bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1393ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1394ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1395ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1396ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1397ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1398ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 13995a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1400ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1401ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1402ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1403ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 140449da9392SJan Kara {Opt_prjquota, "prjquota"}, 1405ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 140606705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 140706705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 140825ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1409923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 1410c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 141164769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1412a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1413a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1414670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1415dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 141636ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 141736ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 14186fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 14196fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1420240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1421b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1422afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 142306705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 142406705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1425744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1426744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 14275328e635SEric Sandeen {Opt_discard, "discard"}, 14285328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1429fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1430fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1431fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1432df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 14336ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 1434cdb7ee4cSTahsin Erdogan {Opt_nombcache, "nombcache"}, 1435cdb7ee4cSTahsin Erdogan {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ 1436c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1437c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1438c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1439c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1440c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1441f3f12faaSJosef Bacik {Opt_err, NULL}, 1442ac27a0ecSDave Kleikamp }; 1443ac27a0ecSDave Kleikamp 1444617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1445ac27a0ecSDave Kleikamp { 1446617ba13bSMingming Cao ext4_fsblk_t sb_block; 1447ac27a0ecSDave Kleikamp char *options = (char *) *data; 1448ac27a0ecSDave Kleikamp 1449ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1450ac27a0ecSDave Kleikamp return 1; /* Default location */ 14510b8e58a1SAndreas Dilger 1452ac27a0ecSDave Kleikamp options += 3; 14530b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1454ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1455ac27a0ecSDave Kleikamp if (*options && *options != ',') { 14564776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1457ac27a0ecSDave Kleikamp (char *) *data); 1458ac27a0ecSDave Kleikamp return 1; 1459ac27a0ecSDave Kleikamp } 1460ac27a0ecSDave Kleikamp if (*options == ',') 1461ac27a0ecSDave Kleikamp options++; 1462ac27a0ecSDave Kleikamp *data = (void *) options; 14630b8e58a1SAndreas Dilger 1464ac27a0ecSDave Kleikamp return sb_block; 1465ac27a0ecSDave Kleikamp } 1466ac27a0ecSDave Kleikamp 1467b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1468d6006186SEric Biggers static const char deprecated_msg[] = 1469d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1470437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1471b3881f74STheodore Ts'o 147256c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 147356c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 147456c50f11SDmitry Monakhov { 147556c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 147656c50f11SDmitry Monakhov char *qname; 147703dafb5fSChen Gang int ret = -1; 147856c50f11SDmitry Monakhov 147956c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 148056c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 148156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 148256c50f11SDmitry Monakhov "Cannot change journaled " 148356c50f11SDmitry Monakhov "quota options when quota turned on"); 148457f73c2cSTheodore Ts'o return -1; 148556c50f11SDmitry Monakhov } 1486e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1487c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, "Journaled quota options " 1488c325a67cSTheodore Ts'o "ignored when QUOTA feature is enabled"); 1489c325a67cSTheodore Ts'o return 1; 1490262b4662SJan Kara } 149156c50f11SDmitry Monakhov qname = match_strdup(args); 149256c50f11SDmitry Monakhov if (!qname) { 149356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 149456c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 149557f73c2cSTheodore Ts'o return -1; 149656c50f11SDmitry Monakhov } 149703dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 149803dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 149903dafb5fSChen Gang ret = 1; 150003dafb5fSChen Gang else 150156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 150203dafb5fSChen Gang "%s quota file already specified", 150303dafb5fSChen Gang QTYPE2NAME(qtype)); 150403dafb5fSChen Gang goto errout; 150556c50f11SDmitry Monakhov } 150603dafb5fSChen Gang if (strchr(qname, '/')) { 150756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 150856c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 150903dafb5fSChen Gang goto errout; 151056c50f11SDmitry Monakhov } 151103dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1512fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 151356c50f11SDmitry Monakhov return 1; 151403dafb5fSChen Gang errout: 151503dafb5fSChen Gang kfree(qname); 151603dafb5fSChen Gang return ret; 151756c50f11SDmitry Monakhov } 151856c50f11SDmitry Monakhov 151956c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 152056c50f11SDmitry Monakhov { 152156c50f11SDmitry Monakhov 152256c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 152356c50f11SDmitry Monakhov 152456c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 152556c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 152656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 152756c50f11SDmitry Monakhov " when quota turned on"); 152857f73c2cSTheodore Ts'o return -1; 152956c50f11SDmitry Monakhov } 153003dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 153156c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 153256c50f11SDmitry Monakhov return 1; 153356c50f11SDmitry Monakhov } 153456c50f11SDmitry Monakhov #endif 153556c50f11SDmitry Monakhov 153626092bf5STheodore Ts'o #define MOPT_SET 0x0001 153726092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 153826092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 153926092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 154026092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 154126092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 154226092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 154326092bf5STheodore Ts'o #define MOPT_Q 0 154426092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 154526092bf5STheodore Ts'o #else 154626092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 154726092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 154826092bf5STheodore Ts'o #endif 154926092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 15508dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 15518dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 15528dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1553ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 155426092bf5STheodore Ts'o 155526092bf5STheodore Ts'o static const struct mount_opts { 155626092bf5STheodore Ts'o int token; 155726092bf5STheodore Ts'o int mount_opt; 155826092bf5STheodore Ts'o int flags; 155926092bf5STheodore Ts'o } ext4_mount_opts[] = { 156026092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 156126092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 156226092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 156326092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 156426092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 156526092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 15668dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 15678dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 15688dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 15698dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 157026092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 157126092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 15728dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 15738dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 15748dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 157559d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1576c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1577c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 15788dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 15791e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 158026092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 15818dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 15821e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 15838dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 158426092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 158526092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 158626092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 15878dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 15887915a861SAles Novak MOPT_NO_EXT2}, 15898dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 15907915a861SAles Novak MOPT_NO_EXT2}, 159126092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 159226092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 159326092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 159426092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 159526092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 159626092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 159726092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 159826092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 159926092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 160026092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 1601923ae0ffSRoss Zwisler {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, 160226092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 16030efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 16040efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 16055ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 16065ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 16075ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 16088dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 16098dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 16108dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 16118dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 161226092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 161326092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 161426092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 161526092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 161626092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 161726092bf5STheodore Ts'o #else 161826092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 161926092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 162026092bf5STheodore Ts'o #endif 162126092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 162226092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 1623670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 162426092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 162526092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 162626092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 162726092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 162826092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 162949da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 163049da9392SJan Kara MOPT_SET | MOPT_Q}, 163126092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 163249da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 163349da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 163426092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 163526092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 163626092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 163726092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 163826092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 163926092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 164026092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1641df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 16426ddb2447STheodore Ts'o {Opt_test_dummy_encryption, 0, MOPT_GTE0}, 1643cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 164426092bf5STheodore Ts'o {Opt_err, 0, 0} 164526092bf5STheodore Ts'o }; 164626092bf5STheodore Ts'o 164726092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 164826092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 164926092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 165026092bf5STheodore Ts'o { 165126092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 165226092bf5STheodore Ts'o const struct mount_opts *m; 165308cefc7aSEric W. Biederman kuid_t uid; 165408cefc7aSEric W. Biederman kgid_t gid; 165526092bf5STheodore Ts'o int arg = 0; 165626092bf5STheodore Ts'o 165757f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 165857f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 165957f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 166057f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 166157f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 166257f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 166357f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 166457f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 166557f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 166657f73c2cSTheodore Ts'o #endif 166726092bf5STheodore Ts'o switch (token) { 1668f7048605STheodore Ts'o case Opt_noacl: 1669f7048605STheodore Ts'o case Opt_nouser_xattr: 1670f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1671f7048605STheodore Ts'o break; 167226092bf5STheodore Ts'o case Opt_sb: 167326092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 167426092bf5STheodore Ts'o case Opt_removed: 16755f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 167626092bf5STheodore Ts'o return 1; 167726092bf5STheodore Ts'o case Opt_abort: 167826092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 167926092bf5STheodore Ts'o return 1; 168026092bf5STheodore Ts'o case Opt_i_version: 168126092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 168226092bf5STheodore Ts'o return 1; 1683a26f4992STheodore Ts'o case Opt_lazytime: 1684a26f4992STheodore Ts'o sb->s_flags |= MS_LAZYTIME; 1685a26f4992STheodore Ts'o return 1; 1686a26f4992STheodore Ts'o case Opt_nolazytime: 1687a26f4992STheodore Ts'o sb->s_flags &= ~MS_LAZYTIME; 1688a26f4992STheodore Ts'o return 1; 168926092bf5STheodore Ts'o } 169026092bf5STheodore Ts'o 16915f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 16925f3633e3SJan Kara if (token == m->token) 16935f3633e3SJan Kara break; 16945f3633e3SJan Kara 16955f3633e3SJan Kara if (m->token == Opt_err) { 16965f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 16975f3633e3SJan Kara "or missing value", opt); 16985f3633e3SJan Kara return -1; 16995f3633e3SJan Kara } 17005f3633e3SJan Kara 17018dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 17028dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 17038dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 17048dc0aa8cSTheodore Ts'o return -1; 17058dc0aa8cSTheodore Ts'o } 17068dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 17078dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 17088dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 17098dc0aa8cSTheodore Ts'o return -1; 17108dc0aa8cSTheodore Ts'o } 17118dc0aa8cSTheodore Ts'o 1712ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 17130efb3b23SJan Kara return -1; 171426092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 171526092bf5STheodore Ts'o return -1; 1716c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 1717c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 171826092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 17191e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 17201e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 1721c93cf2d7SDmitry Monakhov } else 1722c93cf2d7SDmitry Monakhov return -1; 1723c93cf2d7SDmitry Monakhov } 172426092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 172526092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 172626092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 172726092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 172826092bf5STheodore Ts'o "options when quota turned on"); 172926092bf5STheodore Ts'o return -1; 173026092bf5STheodore Ts'o } 173126092bf5STheodore Ts'o 173226092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 173326092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 173426092bf5STheodore Ts'o } else if (token == Opt_commit) { 173526092bf5STheodore Ts'o if (arg == 0) 173626092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 173726092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 1738670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 1739670e9875STheodore Ts'o sbi->s_want_extra_isize = arg; 174026092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 174126092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 174226092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 174326092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 174426092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1745e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1746e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1747e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1748e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 174926092bf5STheodore Ts'o return -1; 175026092bf5STheodore Ts'o } 175126092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 175226092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 175326092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 175426092bf5STheodore Ts'o if (!args->from) 175526092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 175626092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1757df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1758df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 175926092bf5STheodore Ts'o } else if (token == Opt_stripe) { 176026092bf5STheodore Ts'o sbi->s_stripe = arg; 17610efb3b23SJan Kara } else if (token == Opt_resuid) { 17620efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 17630efb3b23SJan Kara if (!uid_valid(uid)) { 17645f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 17650efb3b23SJan Kara return -1; 17660efb3b23SJan Kara } 17670efb3b23SJan Kara sbi->s_resuid = uid; 17680efb3b23SJan Kara } else if (token == Opt_resgid) { 17690efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 17700efb3b23SJan Kara if (!gid_valid(gid)) { 17715f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 17720efb3b23SJan Kara return -1; 17730efb3b23SJan Kara } 17740efb3b23SJan Kara sbi->s_resgid = gid; 17750efb3b23SJan Kara } else if (token == Opt_journal_dev) { 17760efb3b23SJan Kara if (is_remount) { 17770efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 17780efb3b23SJan Kara "Cannot specify journal on remount"); 17790efb3b23SJan Kara return -1; 17800efb3b23SJan Kara } 17810efb3b23SJan Kara *journal_devnum = arg; 1782ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1783ad4eec61SEric Sandeen char *journal_path; 1784ad4eec61SEric Sandeen struct inode *journal_inode; 1785ad4eec61SEric Sandeen struct path path; 1786ad4eec61SEric Sandeen int error; 1787ad4eec61SEric Sandeen 1788ad4eec61SEric Sandeen if (is_remount) { 1789ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1790ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1791ad4eec61SEric Sandeen return -1; 1792ad4eec61SEric Sandeen } 1793ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1794ad4eec61SEric Sandeen if (!journal_path) { 1795ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1796ad4eec61SEric Sandeen "journal device string"); 1797ad4eec61SEric Sandeen return -1; 1798ad4eec61SEric Sandeen } 1799ad4eec61SEric Sandeen 1800ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1801ad4eec61SEric Sandeen if (error) { 1802ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1803ad4eec61SEric Sandeen "journal device path: error %d", error); 1804ad4eec61SEric Sandeen kfree(journal_path); 1805ad4eec61SEric Sandeen return -1; 1806ad4eec61SEric Sandeen } 1807ad4eec61SEric Sandeen 18082b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 1809ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1810ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1811ad4eec61SEric Sandeen "is not a block device", journal_path); 1812ad4eec61SEric Sandeen path_put(&path); 1813ad4eec61SEric Sandeen kfree(journal_path); 1814ad4eec61SEric Sandeen return -1; 1815ad4eec61SEric Sandeen } 1816ad4eec61SEric Sandeen 1817ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1818ad4eec61SEric Sandeen path_put(&path); 1819ad4eec61SEric Sandeen kfree(journal_path); 18200efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 18210efb3b23SJan Kara if (arg > 7) { 18225f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 18230efb3b23SJan Kara " (must be 0-7)"); 18240efb3b23SJan Kara return -1; 18250efb3b23SJan Kara } 18260efb3b23SJan Kara *journal_ioprio = 18270efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 18286ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 18296ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 18306ddb2447STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; 18316ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 18326ddb2447STheodore Ts'o "Test dummy encryption mode enabled"); 18336ddb2447STheodore Ts'o #else 18346ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 18356ddb2447STheodore Ts'o "Test dummy encryption mount option ignored"); 18366ddb2447STheodore Ts'o #endif 183726092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 183826092bf5STheodore Ts'o if (is_remount) { 183926092bf5STheodore Ts'o if (!sbi->s_journal) 184026092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 18415f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 184226092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 184326092bf5STheodore Ts'o "Cannot change data mode on remount"); 184426092bf5STheodore Ts'o return -1; 184526092bf5STheodore Ts'o } 184626092bf5STheodore Ts'o } else { 184726092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 184826092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 184926092bf5STheodore Ts'o } 185026092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 185126092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 185226092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 185326092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 18545f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 18555f3633e3SJan Kara "quota options when quota turned on"); 185626092bf5STheodore Ts'o return -1; 185726092bf5STheodore Ts'o } 1858e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1859c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, 1860c325a67cSTheodore Ts'o "Quota format mount options ignored " 1861262b4662SJan Kara "when QUOTA feature is enabled"); 1862c325a67cSTheodore Ts'o return 1; 1863262b4662SJan Kara } 186426092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 186526092bf5STheodore Ts'o #endif 1866923ae0ffSRoss Zwisler } else if (token == Opt_dax) { 1867ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 1868ef83b6e8SDan Williams ext4_msg(sb, KERN_WARNING, 1869ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 1870ef83b6e8SDan Williams sbi->s_mount_opt |= m->mount_opt; 1871ef83b6e8SDan Williams #else 1872923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 1873923ae0ffSRoss Zwisler return -1; 1874923ae0ffSRoss Zwisler #endif 18757915a861SAles Novak } else if (token == Opt_data_err_abort) { 18767915a861SAles Novak sbi->s_mount_opt |= m->mount_opt; 18777915a861SAles Novak } else if (token == Opt_data_err_ignore) { 18787915a861SAles Novak sbi->s_mount_opt &= ~m->mount_opt; 187926092bf5STheodore Ts'o } else { 188026092bf5STheodore Ts'o if (!args->from) 188126092bf5STheodore Ts'o arg = 1; 188226092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 188326092bf5STheodore Ts'o arg = !arg; 188426092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 188526092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 188626092bf5STheodore Ts'o "buggy handling of option %s", opt); 188726092bf5STheodore Ts'o WARN_ON(1); 188826092bf5STheodore Ts'o return -1; 188926092bf5STheodore Ts'o } 189026092bf5STheodore Ts'o if (arg != 0) 189126092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 189226092bf5STheodore Ts'o else 189326092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 189426092bf5STheodore Ts'o } 189526092bf5STheodore Ts'o return 1; 189626092bf5STheodore Ts'o } 189726092bf5STheodore Ts'o 1898ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1899c3191067STheodore Ts'o unsigned long *journal_devnum, 1900b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1901661aa520SEric Sandeen int is_remount) 1902ac27a0ecSDave Kleikamp { 1903617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1904ac27a0ecSDave Kleikamp char *p; 1905ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 190626092bf5STheodore Ts'o int token; 1907ac27a0ecSDave Kleikamp 1908ac27a0ecSDave Kleikamp if (!options) 1909ac27a0ecSDave Kleikamp return 1; 1910ac27a0ecSDave Kleikamp 1911ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1912ac27a0ecSDave Kleikamp if (!*p) 1913ac27a0ecSDave Kleikamp continue; 191415121c18SEric Sandeen /* 191515121c18SEric Sandeen * Initialize args struct so we know whether arg was 191615121c18SEric Sandeen * found; some options take optional arguments. 191715121c18SEric Sandeen */ 1918caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1919ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 192026092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 192126092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1922ac27a0ecSDave Kleikamp return 0; 1923ac27a0ecSDave Kleikamp } 1924ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 192549da9392SJan Kara /* 192649da9392SJan Kara * We do the test below only for project quotas. 'usrquota' and 192749da9392SJan Kara * 'grpquota' mount options are allowed even without quota feature 192849da9392SJan Kara * to support legacy quotas in quota files. 192949da9392SJan Kara */ 193049da9392SJan Kara if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { 193149da9392SJan Kara ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " 193249da9392SJan Kara "Cannot enable project quota enforcement."); 193349da9392SJan Kara return 0; 193449da9392SJan Kara } 193549da9392SJan Kara if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1936482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1937fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1938ac27a0ecSDave Kleikamp 1939482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1940fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1941ac27a0ecSDave Kleikamp 194256c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1943b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1944b31e1552SEric Sandeen "format mixing"); 1945ac27a0ecSDave Kleikamp return 0; 1946ac27a0ecSDave Kleikamp } 1947ac27a0ecSDave Kleikamp 1948ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1949b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1950b31e1552SEric Sandeen "not specified"); 1951ac27a0ecSDave Kleikamp return 0; 1952ac27a0ecSDave Kleikamp } 1953ac27a0ecSDave Kleikamp } 1954ac27a0ecSDave Kleikamp #endif 1955261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1956261cb20cSJan Kara int blocksize = 1957261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1958261cb20cSJan Kara 195909cbfeafSKirill A. Shutemov if (blocksize < PAGE_SIZE) { 1960261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1961261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1962261cb20cSJan Kara return 0; 1963261cb20cSJan Kara } 1964261cb20cSJan Kara } 1965ac27a0ecSDave Kleikamp return 1; 1966ac27a0ecSDave Kleikamp } 1967ac27a0ecSDave Kleikamp 19682adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 19692adf6da8STheodore Ts'o struct super_block *sb) 19702adf6da8STheodore Ts'o { 19712adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 19722adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 19732adf6da8STheodore Ts'o 19742adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 19752adf6da8STheodore Ts'o char *fmtname = ""; 19762adf6da8STheodore Ts'o 19772adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 19782adf6da8STheodore Ts'o case QFMT_VFS_OLD: 19792adf6da8STheodore Ts'o fmtname = "vfsold"; 19802adf6da8STheodore Ts'o break; 19812adf6da8STheodore Ts'o case QFMT_VFS_V0: 19822adf6da8STheodore Ts'o fmtname = "vfsv0"; 19832adf6da8STheodore Ts'o break; 19842adf6da8STheodore Ts'o case QFMT_VFS_V1: 19852adf6da8STheodore Ts'o fmtname = "vfsv1"; 19862adf6da8STheodore Ts'o break; 19872adf6da8STheodore Ts'o } 19882adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 19892adf6da8STheodore Ts'o } 19902adf6da8STheodore Ts'o 19912adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 1992a068acf2SKees Cook seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); 19932adf6da8STheodore Ts'o 19942adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 1995a068acf2SKees Cook seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); 19962adf6da8STheodore Ts'o #endif 19972adf6da8STheodore Ts'o } 19982adf6da8STheodore Ts'o 19995a916be1STheodore Ts'o static const char *token2str(int token) 20005a916be1STheodore Ts'o { 200150df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 20025a916be1STheodore Ts'o 20035a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 20045a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 20055a916be1STheodore Ts'o break; 20065a916be1STheodore Ts'o return t->pattern; 20075a916be1STheodore Ts'o } 20085a916be1STheodore Ts'o 20092adf6da8STheodore Ts'o /* 20102adf6da8STheodore Ts'o * Show an option if 20112adf6da8STheodore Ts'o * - it's set to a non-default value OR 20122adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 20132adf6da8STheodore Ts'o */ 201466acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 201566acdcf4STheodore Ts'o int nodefs) 20162adf6da8STheodore Ts'o { 20172adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 20182adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 201966acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 20205a916be1STheodore Ts'o const struct mount_opts *m; 202166acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 20222adf6da8STheodore Ts'o 202366acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 202466acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 20252adf6da8STheodore Ts'o 20262adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 20275a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 20285a916be1STheodore Ts'o 20295a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 20305a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 20315a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 20325a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 20335a916be1STheodore Ts'o continue; 203466acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 20355a916be1STheodore Ts'o continue; /* skip if same as the default */ 20365a916be1STheodore Ts'o if ((want_set && 20375a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 20385a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 20395a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 20405a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 20415a916be1STheodore Ts'o } 20425a916be1STheodore Ts'o 204308cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 20445a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 204508cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 204608cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 204708cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 20485a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 204908cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 205008cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 205166acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 20525a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 20535a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 20542adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 20555a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 20562adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 20575a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 205866acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 20595a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 206066acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 20615a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 206266acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 20635a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 20642adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 20655a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 206666acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 20675a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 206866acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 20692adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 20705a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 20712adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 20725a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 20732adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 20745a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 20755a916be1STheodore Ts'o } 207666acdcf4STheodore Ts'o if (nodefs || 207766acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 20785a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 20792adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 20802adf6da8STheodore Ts'o 208166acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 208266acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 20835a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2084df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2085df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 20867915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 20877915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 20882adf6da8STheodore Ts'o 20892adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 20902adf6da8STheodore Ts'o return 0; 20912adf6da8STheodore Ts'o } 20922adf6da8STheodore Ts'o 209366acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 209466acdcf4STheodore Ts'o { 209566acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 209666acdcf4STheodore Ts'o } 209766acdcf4STheodore Ts'o 2098ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 209966acdcf4STheodore Ts'o { 210066acdcf4STheodore Ts'o struct super_block *sb = seq->private; 210166acdcf4STheodore Ts'o int rc; 210266acdcf4STheodore Ts'o 210366acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 210466acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 210566acdcf4STheodore Ts'o seq_puts(seq, "\n"); 210666acdcf4STheodore Ts'o return rc; 210766acdcf4STheodore Ts'o } 210866acdcf4STheodore Ts'o 2109617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 2110ac27a0ecSDave Kleikamp int read_only) 2111ac27a0ecSDave Kleikamp { 2112617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2113ac27a0ecSDave Kleikamp int res = 0; 2114ac27a0ecSDave Kleikamp 2115617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 2116b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 2117b31e1552SEric Sandeen "forcing read-only mode"); 2118ac27a0ecSDave Kleikamp res = MS_RDONLY; 2119ac27a0ecSDave Kleikamp } 2120ac27a0ecSDave Kleikamp if (read_only) 2121281b5995STheodore Ts'o goto done; 2122617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 2123b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 2124b31e1552SEric Sandeen "running e2fsck is recommended"); 2125c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 2126b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2127b31e1552SEric Sandeen "warning: mounting fs with errors, " 2128b31e1552SEric Sandeen "running e2fsck is recommended"); 2129ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 2130ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 2131ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 2132b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2133b31e1552SEric Sandeen "warning: maximal mount count reached, " 2134b31e1552SEric Sandeen "running e2fsck is recommended"); 2135ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 2136ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 2137ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 2138b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2139b31e1552SEric Sandeen "warning: checktime reached, " 2140b31e1552SEric Sandeen "running e2fsck is recommended"); 21410390131bSFrank Mayhar if (!sbi->s_journal) 2142216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 2143ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 2144617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 2145e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 2146ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 2147617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 21480390131bSFrank Mayhar if (sbi->s_journal) 2149e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 2150ac27a0ecSDave Kleikamp 2151e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 2152281b5995STheodore Ts'o done: 2153ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2154a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2155a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2156ac27a0ecSDave Kleikamp sb->s_blocksize, 2157ac27a0ecSDave Kleikamp sbi->s_groups_count, 2158617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2159617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2160a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2161ac27a0ecSDave Kleikamp 21627abc52c2SDan Magenheimer cleancache_init_fs(sb); 2163ac27a0ecSDave Kleikamp return res; 2164ac27a0ecSDave Kleikamp } 2165ac27a0ecSDave Kleikamp 2166117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 2167117fff10STheodore Ts'o { 2168117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 2169117fff10STheodore Ts'o struct flex_groups *new_groups; 2170117fff10STheodore Ts'o int size; 2171117fff10STheodore Ts'o 2172117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 2173117fff10STheodore Ts'o return 0; 2174117fff10STheodore Ts'o 2175117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 2176117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 2177117fff10STheodore Ts'o return 0; 2178117fff10STheodore Ts'o 2179117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 2180a7c3e901SMichal Hocko new_groups = kvzalloc(size, GFP_KERNEL); 2181117fff10STheodore Ts'o if (!new_groups) { 2182117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 2183117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 2184117fff10STheodore Ts'o return -ENOMEM; 2185117fff10STheodore Ts'o } 2186117fff10STheodore Ts'o 2187117fff10STheodore Ts'o if (sbi->s_flex_groups) { 2188117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 2189117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 2190117fff10STheodore Ts'o sizeof(struct flex_groups))); 2191b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 2192117fff10STheodore Ts'o } 2193117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 2194117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 2195117fff10STheodore Ts'o return 0; 2196117fff10STheodore Ts'o } 2197117fff10STheodore Ts'o 2198772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2199772cb7c8SJose R. Santos { 2200772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2201772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 2202772cb7c8SJose R. Santos ext4_group_t flex_group; 2203117fff10STheodore Ts'o int i, err; 2204772cb7c8SJose R. Santos 2205503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2206d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2207772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2208772cb7c8SJose R. Santos return 1; 2209772cb7c8SJose R. Santos } 2210772cb7c8SJose R. Santos 2211117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2212117fff10STheodore Ts'o if (err) 2213772cb7c8SJose R. Santos goto failed; 2214772cb7c8SJose R. Santos 2215772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 221688b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2217772cb7c8SJose R. Santos 2218772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 22197ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 22207ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 222190ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 222224aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 22237ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 22247ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2225772cb7c8SJose R. Santos } 2226772cb7c8SJose R. Santos 2227772cb7c8SJose R. Santos return 1; 2228772cb7c8SJose R. Santos failed: 2229772cb7c8SJose R. Santos return 0; 2230772cb7c8SJose R. Santos } 2231772cb7c8SJose R. Santos 2232e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2233717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2234717d50e4SAndreas Dilger { 2235b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 2236717d50e4SAndreas Dilger __u16 crc = 0; 2237717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2238e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 2239717d50e4SAndreas Dilger 22409aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2241feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2242feb0ab32SDarrick J. Wong __u32 csum32; 2243b47820edSDaeho Jeong __u16 dummy_csum = 0; 2244feb0ab32SDarrick J. Wong 2245feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2246feb0ab32SDarrick J. Wong sizeof(le_group)); 2247b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 2248b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 2249b47820edSDaeho Jeong sizeof(dummy_csum)); 2250b47820edSDaeho Jeong offset += sizeof(dummy_csum); 2251b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 2252b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 2253b47820edSDaeho Jeong sbi->s_desc_size - offset); 2254feb0ab32SDarrick J. Wong 2255feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2256feb0ab32SDarrick J. Wong goto out; 2257feb0ab32SDarrick J. Wong } 2258feb0ab32SDarrick J. Wong 2259feb0ab32SDarrick J. Wong /* old crc16 code */ 2260e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 2261813d32f9SDarrick J. Wong return 0; 2262813d32f9SDarrick J. Wong 2263717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2264717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2265717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2266717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2267717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2268e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 2269717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2270717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2271717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2272717d50e4SAndreas Dilger offset); 2273717d50e4SAndreas Dilger 2274feb0ab32SDarrick J. Wong out: 2275717d50e4SAndreas Dilger return cpu_to_le16(crc); 2276717d50e4SAndreas Dilger } 2277717d50e4SAndreas Dilger 2278feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2279717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2280717d50e4SAndreas Dilger { 2281feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2282e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 2283717d50e4SAndreas Dilger return 0; 2284717d50e4SAndreas Dilger 2285717d50e4SAndreas Dilger return 1; 2286717d50e4SAndreas Dilger } 2287717d50e4SAndreas Dilger 2288feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2289feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2290feb0ab32SDarrick J. Wong { 2291feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2292feb0ab32SDarrick J. Wong return; 2293e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 2294feb0ab32SDarrick J. Wong } 2295feb0ab32SDarrick J. Wong 2296ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2297bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2298829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 2299bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2300ac27a0ecSDave Kleikamp { 2301617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2302617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2303617ba13bSMingming Cao ext4_fsblk_t last_block; 2304bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2305bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2306bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2307ce421581SJose R. Santos int flexbg_flag = 0; 2308bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2309ac27a0ecSDave Kleikamp 2310e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 2311ce421581SJose R. Santos flexbg_flag = 1; 2312ce421581SJose R. Santos 2313617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2314ac27a0ecSDave Kleikamp 2315197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2316197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2317197cd65aSAkinobu Mita 2318ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2319bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2320ac27a0ecSDave Kleikamp else 2321ac27a0ecSDave Kleikamp last_block = first_block + 2322617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2323ac27a0ecSDave Kleikamp 2324bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2325bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2326bfff6873SLukas Czerner grp = i; 2327bfff6873SLukas Czerner 23288fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 2329829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 2330829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2331829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 2332829fa70dSTheodore Ts'o "superblock", i); 2333829fa70dSTheodore Ts'o } 23342b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2335b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2336a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2337b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2338ac27a0ecSDave Kleikamp return 0; 2339ac27a0ecSDave Kleikamp } 23408fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 2341829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 2342829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2343829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 2344829fa70dSTheodore Ts'o "superblock", i); 2345829fa70dSTheodore Ts'o } 23462b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2347b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2348a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2349b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2350ac27a0ecSDave Kleikamp return 0; 2351ac27a0ecSDave Kleikamp } 23528fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2353829fa70dSTheodore Ts'o if (inode_table == sb_block) { 2354829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2355829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 2356829fa70dSTheodore Ts'o "superblock", i); 2357829fa70dSTheodore Ts'o } 2358bd81d8eeSLaurent Vivier if (inode_table < first_block || 23592b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2360b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2361a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2362b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2363ac27a0ecSDave Kleikamp return 0; 2364ac27a0ecSDave Kleikamp } 2365955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2366feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2367b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2368b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2369e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 2370fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 23717ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2372955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2373717d50e4SAndreas Dilger return 0; 2374717d50e4SAndreas Dilger } 23757ee1ec4cSLi Zefan } 2376955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2377ce421581SJose R. Santos if (!flexbg_flag) 2378617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2379ac27a0ecSDave Kleikamp } 2380bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2381bfff6873SLukas Czerner *first_not_zeroed = grp; 2382ac27a0ecSDave Kleikamp return 1; 2383ac27a0ecSDave Kleikamp } 2384ac27a0ecSDave Kleikamp 2385617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2386ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2387ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2388ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2389ac27a0ecSDave Kleikamp * 2390ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2391ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2392ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2393ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2394ac27a0ecSDave Kleikamp * 2395ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2396ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2397ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2398617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2399ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2400ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2401ac27a0ecSDave Kleikamp */ 2402617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2403617ba13bSMingming Cao struct ext4_super_block *es) 2404ac27a0ecSDave Kleikamp { 2405ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 24062c98eb5eSTheodore Ts'o int ret, nr_orphans = 0, nr_truncates = 0; 2407ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2408ac27a0ecSDave Kleikamp int i; 2409ac27a0ecSDave Kleikamp #endif 2410ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2411ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2412ac27a0ecSDave Kleikamp return; 2413ac27a0ecSDave Kleikamp } 2414ac27a0ecSDave Kleikamp 2415a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2416b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2417b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2418a8f48a95SEric Sandeen return; 2419a8f48a95SEric Sandeen } 2420a8f48a95SEric Sandeen 2421d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2422d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2423d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2424d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2425d39195c3SAmir Goldstein return; 2426d39195c3SAmir Goldstein } 2427d39195c3SAmir Goldstein 2428617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2429c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2430c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 243184474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2432ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2433ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2434c25f9bc6SEric Sandeen } 2435ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2436ac27a0ecSDave Kleikamp return; 2437ac27a0ecSDave Kleikamp } 2438ac27a0ecSDave Kleikamp 2439ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2440b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2441ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2442ac27a0ecSDave Kleikamp } 2443ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2444ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2445ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2446ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2447a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2448617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2449617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2450ac27a0ecSDave Kleikamp if (ret < 0) 2451b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2452b31e1552SEric Sandeen "Cannot turn on journaled " 2453b31e1552SEric Sandeen "quota: error %d", ret); 2454ac27a0ecSDave Kleikamp } 2455ac27a0ecSDave Kleikamp } 2456ac27a0ecSDave Kleikamp #endif 2457ac27a0ecSDave Kleikamp 2458ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2459ac27a0ecSDave Kleikamp struct inode *inode; 2460ac27a0ecSDave Kleikamp 2461c65d5c6cSVegard Nossum /* 2462c65d5c6cSVegard Nossum * We may have encountered an error during cleanup; if 2463c65d5c6cSVegard Nossum * so, skip the rest. 2464c65d5c6cSVegard Nossum */ 2465c65d5c6cSVegard Nossum if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2466c65d5c6cSVegard Nossum jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2467c65d5c6cSVegard Nossum es->s_last_orphan = 0; 2468c65d5c6cSVegard Nossum break; 2469c65d5c6cSVegard Nossum } 2470c65d5c6cSVegard Nossum 247197bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 247297bd42b9SJosef Bacik if (IS_ERR(inode)) { 2473ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2474ac27a0ecSDave Kleikamp break; 2475ac27a0ecSDave Kleikamp } 2476ac27a0ecSDave Kleikamp 2477617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2478871a2931SChristoph Hellwig dquot_initialize(inode); 2479ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2480566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2481b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2482b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 248346e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2484e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2485ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 24865955102cSAl Viro inode_lock(inode); 248755f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 24882c98eb5eSTheodore Ts'o ret = ext4_truncate(inode); 24892c98eb5eSTheodore Ts'o if (ret) 24902c98eb5eSTheodore Ts'o ext4_std_error(inode->i_sb, ret); 24915955102cSAl Viro inode_unlock(inode); 2492ac27a0ecSDave Kleikamp nr_truncates++; 2493ac27a0ecSDave Kleikamp } else { 2494566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2495b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2496b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 249746e665e9SHarvey Harrison __func__, inode->i_ino); 2498ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2499ac27a0ecSDave Kleikamp inode->i_ino); 2500ac27a0ecSDave Kleikamp nr_orphans++; 2501ac27a0ecSDave Kleikamp } 2502ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2503ac27a0ecSDave Kleikamp } 2504ac27a0ecSDave Kleikamp 2505ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2506ac27a0ecSDave Kleikamp 2507ac27a0ecSDave Kleikamp if (nr_orphans) 2508b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2509b31e1552SEric Sandeen PLURAL(nr_orphans)); 2510ac27a0ecSDave Kleikamp if (nr_truncates) 2511b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2512b31e1552SEric Sandeen PLURAL(nr_truncates)); 2513ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2514ac27a0ecSDave Kleikamp /* Turn quotas off */ 2515a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2516ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2517287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2518ac27a0ecSDave Kleikamp } 2519ac27a0ecSDave Kleikamp #endif 2520ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2521ac27a0ecSDave Kleikamp } 25220b8e58a1SAndreas Dilger 2523cd2291a4SEric Sandeen /* 2524cd2291a4SEric Sandeen * Maximal extent format file size. 2525cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2526cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2527cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2528cd2291a4SEric Sandeen * so that won't be a limiting factor. 2529cd2291a4SEric Sandeen * 2530f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2531f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2532f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2533f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2534f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2535f17722f9SLukas Czerner * 2536cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2537cd2291a4SEric Sandeen */ 2538f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2539cd2291a4SEric Sandeen { 2540cd2291a4SEric Sandeen loff_t res; 2541cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2542cd2291a4SEric Sandeen 2543cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2544f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2545cd2291a4SEric Sandeen /* 254690c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2547cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2548cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2549cd2291a4SEric Sandeen */ 2550cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2551cd2291a4SEric Sandeen 2552cd2291a4SEric Sandeen /* total blocks in file system block size */ 2553cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2554cd2291a4SEric Sandeen upper_limit <<= blkbits; 2555cd2291a4SEric Sandeen } 2556cd2291a4SEric Sandeen 2557f17722f9SLukas Czerner /* 2558f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2559f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2560f17722f9SLukas Czerner * size 2561f17722f9SLukas Czerner */ 2562f17722f9SLukas Czerner res = (1LL << 32) - 1; 2563cd2291a4SEric Sandeen res <<= blkbits; 2564cd2291a4SEric Sandeen 2565cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2566cd2291a4SEric Sandeen if (res > upper_limit) 2567cd2291a4SEric Sandeen res = upper_limit; 2568cd2291a4SEric Sandeen 2569cd2291a4SEric Sandeen return res; 2570cd2291a4SEric Sandeen } 2571ac27a0ecSDave Kleikamp 2572ac27a0ecSDave Kleikamp /* 2573cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 25740fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 25750fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2576ac27a0ecSDave Kleikamp */ 2577f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2578ac27a0ecSDave Kleikamp { 2579617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 25800fc1b451SAneesh Kumar K.V int meta_blocks; 25810fc1b451SAneesh Kumar K.V loff_t upper_limit; 25820b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 25830b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 25840b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 25850b8e58a1SAndreas Dilger * 25860b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 25870b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 25880fc1b451SAneesh Kumar K.V */ 25890fc1b451SAneesh Kumar K.V 2590f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 25910fc1b451SAneesh Kumar K.V /* 259290c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 25930b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 25940b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 25950fc1b451SAneesh Kumar K.V */ 25960fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 25970fc1b451SAneesh Kumar K.V 25980fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 25990fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 26000fc1b451SAneesh Kumar K.V 26010fc1b451SAneesh Kumar K.V } else { 26028180a562SAneesh Kumar K.V /* 26038180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 26048180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 26058180a562SAneesh Kumar K.V * represent total number of blocks in 26068180a562SAneesh Kumar K.V * file system block size 26078180a562SAneesh Kumar K.V */ 26080fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 26090fc1b451SAneesh Kumar K.V 26100fc1b451SAneesh Kumar K.V } 26110fc1b451SAneesh Kumar K.V 26120fc1b451SAneesh Kumar K.V /* indirect blocks */ 26130fc1b451SAneesh Kumar K.V meta_blocks = 1; 26140fc1b451SAneesh Kumar K.V /* double indirect blocks */ 26150fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 26160fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 26170fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 26180fc1b451SAneesh Kumar K.V 26190fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 26200fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2621ac27a0ecSDave Kleikamp 2622ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2623ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2624ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2625ac27a0ecSDave Kleikamp res <<= bits; 2626ac27a0ecSDave Kleikamp if (res > upper_limit) 2627ac27a0ecSDave Kleikamp res = upper_limit; 26280fc1b451SAneesh Kumar K.V 26290fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 26300fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 26310fc1b451SAneesh Kumar K.V 2632ac27a0ecSDave Kleikamp return res; 2633ac27a0ecSDave Kleikamp } 2634ac27a0ecSDave Kleikamp 2635617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 263670bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2637ac27a0ecSDave Kleikamp { 2638617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2639fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2640ac27a0ecSDave Kleikamp int has_super = 0; 2641ac27a0ecSDave Kleikamp 2642ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2643ac27a0ecSDave Kleikamp 2644e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 264570bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2646ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2647617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2648ac27a0ecSDave Kleikamp has_super = 1; 26490b8e58a1SAndreas Dilger 2650bd63f6b0SDarrick J. Wong /* 2651bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2652bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2653bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2654bd63f6b0SDarrick J. Wong * compensate. 2655bd63f6b0SDarrick J. Wong */ 2656bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2657bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2658bd63f6b0SDarrick J. Wong has_super++; 2659bd63f6b0SDarrick J. Wong 2660617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2661ac27a0ecSDave Kleikamp } 2662ac27a0ecSDave Kleikamp 2663c9de560dSAlex Tomas /** 2664c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2665c9de560dSAlex Tomas * @sbi: In memory super block info 2666c9de560dSAlex Tomas * 2667c9de560dSAlex Tomas * If we have specified it via mount option, then 2668c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2669c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2670c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2671c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2672c9de560dSAlex Tomas * 2673c9de560dSAlex Tomas */ 2674c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2675c9de560dSAlex Tomas { 2676c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2677c9de560dSAlex Tomas unsigned long stripe_width = 2678c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 26793eb08658SDan Ehrenberg int ret; 2680c9de560dSAlex Tomas 2681c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 26823eb08658SDan Ehrenberg ret = sbi->s_stripe; 26835469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 26843eb08658SDan Ehrenberg ret = stripe_width; 26855469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 26863eb08658SDan Ehrenberg ret = stride; 26873eb08658SDan Ehrenberg else 26883eb08658SDan Ehrenberg ret = 0; 2689c9de560dSAlex Tomas 26903eb08658SDan Ehrenberg /* 26913eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 26923eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 26933eb08658SDan Ehrenberg */ 26943eb08658SDan Ehrenberg if (ret <= 1) 26953eb08658SDan Ehrenberg ret = 0; 2696c9de560dSAlex Tomas 26973eb08658SDan Ehrenberg return ret; 2698c9de560dSAlex Tomas } 2699ac27a0ecSDave Kleikamp 2700a13fb1a4SEric Sandeen /* 2701a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2702a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2703a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2704a13fb1a4SEric Sandeen * 0 if it cannot be. 2705a13fb1a4SEric Sandeen */ 2706a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2707a13fb1a4SEric Sandeen { 2708e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 2709a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2710a13fb1a4SEric Sandeen "Couldn't mount because of " 2711a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2712a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2713a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2714a13fb1a4SEric Sandeen return 0; 2715a13fb1a4SEric Sandeen } 2716a13fb1a4SEric Sandeen 2717a13fb1a4SEric Sandeen if (readonly) 2718a13fb1a4SEric Sandeen return 1; 2719a13fb1a4SEric Sandeen 2720e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 27212cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 27222cb5cc8bSDarrick J. Wong sb->s_flags |= MS_RDONLY; 27232cb5cc8bSDarrick J. Wong return 1; 27242cb5cc8bSDarrick J. Wong } 27252cb5cc8bSDarrick J. Wong 2726a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2727e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 2728a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2729a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2730a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2731a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2732a13fb1a4SEric Sandeen return 0; 2733a13fb1a4SEric Sandeen } 2734a13fb1a4SEric Sandeen /* 2735a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2736a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2737a13fb1a4SEric Sandeen */ 2738e2b911c5SDarrick J. Wong if (ext4_has_feature_huge_file(sb)) { 2739a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2740a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2741a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2742a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2743a13fb1a4SEric Sandeen return 0; 2744a13fb1a4SEric Sandeen } 2745a13fb1a4SEric Sandeen } 2746e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 2747bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2748bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2749bab08ab9STheodore Ts'o "extents feature\n"); 2750bab08ab9STheodore Ts'o return 0; 2751bab08ab9STheodore Ts'o } 27527c319d32SAditya Kali 27537c319d32SAditya Kali #ifndef CONFIG_QUOTA 2754e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !readonly) { 27557c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 27567c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 27577c319d32SAditya Kali "without CONFIG_QUOTA"); 27587c319d32SAditya Kali return 0; 27597c319d32SAditya Kali } 2760689c958cSLi Xi if (ext4_has_feature_project(sb) && !readonly) { 2761689c958cSLi Xi ext4_msg(sb, KERN_ERR, 2762689c958cSLi Xi "Filesystem with project quota feature cannot be mounted RDWR " 2763689c958cSLi Xi "without CONFIG_QUOTA"); 2764689c958cSLi Xi return 0; 2765689c958cSLi Xi } 27667c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2767a13fb1a4SEric Sandeen return 1; 2768a13fb1a4SEric Sandeen } 2769a13fb1a4SEric Sandeen 277066e61a9eSTheodore Ts'o /* 277166e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 277266e61a9eSTheodore Ts'o * on the file system 277366e61a9eSTheodore Ts'o */ 277466e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 277566e61a9eSTheodore Ts'o { 277666e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 277766e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 277866e61a9eSTheodore Ts'o struct ext4_super_block *es; 277966e61a9eSTheodore Ts'o 278066e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 278166e61a9eSTheodore Ts'o es = sbi->s_es; 278266e61a9eSTheodore Ts'o 278366e61a9eSTheodore Ts'o if (es->s_error_count) 2784ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2785ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 278666e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 278766e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2788ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 278966e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 279066e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 279166e61a9eSTheodore Ts'o es->s_first_error_func, 279266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 279366e61a9eSTheodore Ts'o if (es->s_first_error_ino) 2794651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 279566e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 279666e61a9eSTheodore Ts'o if (es->s_first_error_block) 2797651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 279866e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 2799651e1c3bSJoe Perches printk(KERN_CONT "\n"); 280066e61a9eSTheodore Ts'o } 280166e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2802ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 280366e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 280466e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 280566e61a9eSTheodore Ts'o es->s_last_error_func, 280666e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 280766e61a9eSTheodore Ts'o if (es->s_last_error_ino) 2808651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 280966e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 281066e61a9eSTheodore Ts'o if (es->s_last_error_block) 2811651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 281266e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 2813651e1c3bSJoe Perches printk(KERN_CONT "\n"); 281466e61a9eSTheodore Ts'o } 281566e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 281666e61a9eSTheodore Ts'o } 281766e61a9eSTheodore Ts'o 2818bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2819bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2820bfff6873SLukas Czerner { 2821bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2822bfff6873SLukas Czerner ext4_group_t group, ngroups; 2823bfff6873SLukas Czerner struct super_block *sb; 2824bfff6873SLukas Czerner unsigned long timeout = 0; 2825bfff6873SLukas Czerner int ret = 0; 2826bfff6873SLukas Czerner 2827bfff6873SLukas Czerner sb = elr->lr_super; 2828bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2829bfff6873SLukas Czerner 2830bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2831bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2832bfff6873SLukas Czerner if (!gdp) { 2833bfff6873SLukas Czerner ret = 1; 2834bfff6873SLukas Czerner break; 2835bfff6873SLukas Czerner } 2836bfff6873SLukas Czerner 2837bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2838bfff6873SLukas Czerner break; 2839bfff6873SLukas Czerner } 2840bfff6873SLukas Czerner 28417f511862STheodore Ts'o if (group >= ngroups) 2842bfff6873SLukas Czerner ret = 1; 2843bfff6873SLukas Czerner 2844bfff6873SLukas Czerner if (!ret) { 2845bfff6873SLukas Czerner timeout = jiffies; 2846bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2847bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2848bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 284951ce6511SLukas Czerner timeout = (jiffies - timeout) * 285051ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2851bfff6873SLukas Czerner elr->lr_timeout = timeout; 2852bfff6873SLukas Czerner } 2853bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2854bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2855bfff6873SLukas Czerner } 2856bfff6873SLukas Czerner return ret; 2857bfff6873SLukas Czerner } 2858bfff6873SLukas Czerner 2859bfff6873SLukas Czerner /* 2860bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 28614ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2862bfff6873SLukas Czerner */ 2863bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2864bfff6873SLukas Czerner { 2865bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2866bfff6873SLukas Czerner 2867bfff6873SLukas Czerner if (!elr) 2868bfff6873SLukas Czerner return; 2869bfff6873SLukas Czerner 2870bfff6873SLukas Czerner sbi = elr->lr_sbi; 2871bfff6873SLukas Czerner 2872bfff6873SLukas Czerner list_del(&elr->lr_request); 2873bfff6873SLukas Czerner sbi->s_li_request = NULL; 2874bfff6873SLukas Czerner kfree(elr); 2875bfff6873SLukas Czerner } 2876bfff6873SLukas Czerner 2877bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2878bfff6873SLukas Czerner { 28791bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 28801bb933fbSLukas Czerner if (!ext4_li_info) { 28811bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2882bfff6873SLukas Czerner return; 28831bb933fbSLukas Czerner } 2884bfff6873SLukas Czerner 2885bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 28861bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2887bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 28881bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2889bfff6873SLukas Czerner } 2890bfff6873SLukas Czerner 28918f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 28928f1f7453SEric Sandeen 2893bfff6873SLukas Czerner /* 2894bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2895bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2896bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2897bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2898bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2899bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2900bfff6873SLukas Czerner * next waking time and put itself into sleep. 2901bfff6873SLukas Czerner */ 2902bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2903bfff6873SLukas Czerner { 2904bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2905bfff6873SLukas Czerner struct list_head *pos, *n; 2906bfff6873SLukas Czerner struct ext4_li_request *elr; 29074ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2908bfff6873SLukas Czerner 2909bfff6873SLukas Czerner BUG_ON(NULL == eli); 2910bfff6873SLukas Czerner 2911bfff6873SLukas Czerner cont_thread: 2912bfff6873SLukas Czerner while (true) { 2913bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2914bfff6873SLukas Czerner 2915bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2916bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2917bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2918bfff6873SLukas Czerner goto exit_thread; 2919bfff6873SLukas Czerner } 2920bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2921e22834f0SDmitry Monakhov int err = 0; 2922e22834f0SDmitry Monakhov int progress = 0; 2923bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2924bfff6873SLukas Czerner lr_request); 2925bfff6873SLukas Czerner 2926e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 2927e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 2928e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 2929e22834f0SDmitry Monakhov continue; 2930e22834f0SDmitry Monakhov } 2931e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 2932e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 2933e22834f0SDmitry Monakhov progress = 1; 2934e22834f0SDmitry Monakhov /* 2935e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 2936e22834f0SDmitry Monakhov * be removed from the list, it is 2937e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 2938e22834f0SDmitry Monakhov */ 2939e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 2940e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 2941e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 2942e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 2943e22834f0SDmitry Monakhov n = pos->next; 2944e22834f0SDmitry Monakhov } 2945e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 2946e22834f0SDmitry Monakhov } 2947b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2948e22834f0SDmitry Monakhov if (err) { 2949bfff6873SLukas Czerner ext4_remove_li_request(elr); 2950bfff6873SLukas Czerner continue; 2951bfff6873SLukas Czerner } 2952e22834f0SDmitry Monakhov if (!progress) { 2953e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 2954e22834f0SDmitry Monakhov (prandom_u32() 2955e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 2956b2c78cd0STheodore Ts'o } 2957bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2958bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2959bfff6873SLukas Czerner } 2960bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2961bfff6873SLukas Czerner 2962a0acae0eSTejun Heo try_to_freeze(); 2963bfff6873SLukas Czerner 29644ed5c033SLukas Czerner cur = jiffies; 29654ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2966f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2967bfff6873SLukas Czerner cond_resched(); 2968bfff6873SLukas Czerner continue; 2969bfff6873SLukas Czerner } 2970bfff6873SLukas Czerner 29714ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 29724ed5c033SLukas Czerner 29738f1f7453SEric Sandeen if (kthread_should_stop()) { 29748f1f7453SEric Sandeen ext4_clear_request_list(); 29758f1f7453SEric Sandeen goto exit_thread; 29768f1f7453SEric Sandeen } 2977bfff6873SLukas Czerner } 2978bfff6873SLukas Czerner 2979bfff6873SLukas Czerner exit_thread: 2980bfff6873SLukas Czerner /* 2981bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2982bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2983bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2984bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2985bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2986bfff6873SLukas Czerner * new one. 2987bfff6873SLukas Czerner */ 2988bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2989bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2990bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2991bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2992bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2993bfff6873SLukas Czerner goto cont_thread; 2994bfff6873SLukas Czerner } 2995bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2996bfff6873SLukas Czerner kfree(ext4_li_info); 2997bfff6873SLukas Czerner ext4_li_info = NULL; 2998bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2999bfff6873SLukas Czerner 3000bfff6873SLukas Czerner return 0; 3001bfff6873SLukas Czerner } 3002bfff6873SLukas Czerner 3003bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3004bfff6873SLukas Czerner { 3005bfff6873SLukas Czerner struct list_head *pos, *n; 3006bfff6873SLukas Czerner struct ext4_li_request *elr; 3007bfff6873SLukas Czerner 3008bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3009bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3010bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3011bfff6873SLukas Czerner lr_request); 3012bfff6873SLukas Czerner ext4_remove_li_request(elr); 3013bfff6873SLukas Czerner } 3014bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3015bfff6873SLukas Czerner } 3016bfff6873SLukas Czerner 3017bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3018bfff6873SLukas Czerner { 30198f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 30208f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 30218f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 30228f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3023bfff6873SLukas Czerner ext4_clear_request_list(); 3024bfff6873SLukas Czerner kfree(ext4_li_info); 3025bfff6873SLukas Czerner ext4_li_info = NULL; 302692b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3027bfff6873SLukas Czerner "initialization thread\n", 3028bfff6873SLukas Czerner err); 3029bfff6873SLukas Czerner return err; 3030bfff6873SLukas Czerner } 3031bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3032bfff6873SLukas Czerner return 0; 3033bfff6873SLukas Czerner } 3034bfff6873SLukas Czerner 3035bfff6873SLukas Czerner /* 3036bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3037bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3038bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3039bfff6873SLukas Czerner * groups and return total number of groups. 3040bfff6873SLukas Czerner */ 3041bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3042bfff6873SLukas Czerner { 3043bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3044bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3045bfff6873SLukas Czerner 3046bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3047bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3048bfff6873SLukas Czerner if (!gdp) 3049bfff6873SLukas Czerner continue; 3050bfff6873SLukas Czerner 3051bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3052bfff6873SLukas Czerner break; 3053bfff6873SLukas Czerner } 3054bfff6873SLukas Czerner 3055bfff6873SLukas Czerner return group; 3056bfff6873SLukas Czerner } 3057bfff6873SLukas Czerner 3058bfff6873SLukas Czerner static int ext4_li_info_new(void) 3059bfff6873SLukas Czerner { 3060bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3061bfff6873SLukas Czerner 3062bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3063bfff6873SLukas Czerner if (!eli) 3064bfff6873SLukas Czerner return -ENOMEM; 3065bfff6873SLukas Czerner 3066bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3067bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3068bfff6873SLukas Czerner 3069bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3070bfff6873SLukas Czerner 3071bfff6873SLukas Czerner ext4_li_info = eli; 3072bfff6873SLukas Czerner 3073bfff6873SLukas Czerner return 0; 3074bfff6873SLukas Czerner } 3075bfff6873SLukas Czerner 3076bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3077bfff6873SLukas Czerner ext4_group_t start) 3078bfff6873SLukas Czerner { 3079bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3080bfff6873SLukas Czerner struct ext4_li_request *elr; 3081bfff6873SLukas Czerner 3082bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3083bfff6873SLukas Czerner if (!elr) 3084bfff6873SLukas Czerner return NULL; 3085bfff6873SLukas Czerner 3086bfff6873SLukas Czerner elr->lr_super = sb; 3087bfff6873SLukas Czerner elr->lr_sbi = sbi; 3088bfff6873SLukas Czerner elr->lr_next_group = start; 3089bfff6873SLukas Czerner 3090bfff6873SLukas Czerner /* 3091bfff6873SLukas Czerner * Randomize first schedule time of the request to 3092bfff6873SLukas Czerner * spread the inode table initialization requests 3093bfff6873SLukas Czerner * better. 3094bfff6873SLukas Czerner */ 3095dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3096dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3097bfff6873SLukas Czerner return elr; 3098bfff6873SLukas Czerner } 3099bfff6873SLukas Czerner 31007f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3101bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3102bfff6873SLukas Czerner { 3103bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 31047f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 3105bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 31066c5a6cb9SAndrew Morton int ret = 0; 3107bfff6873SLukas Czerner 31087f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 310951ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 311051ce6511SLukas Czerner /* 311151ce6511SLukas Czerner * Reset timeout so it can be computed again, because 311251ce6511SLukas Czerner * s_li_wait_mult might have changed. 311351ce6511SLukas Czerner */ 311451ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 31157f511862STheodore Ts'o goto out; 311651ce6511SLukas Czerner } 3117bfff6873SLukas Czerner 3118bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3119bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 312055ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 31217f511862STheodore Ts'o goto out; 3122bfff6873SLukas Czerner 3123bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 31247f511862STheodore Ts'o if (!elr) { 31257f511862STheodore Ts'o ret = -ENOMEM; 31267f511862STheodore Ts'o goto out; 31277f511862STheodore Ts'o } 3128bfff6873SLukas Czerner 3129bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3130bfff6873SLukas Czerner ret = ext4_li_info_new(); 3131bfff6873SLukas Czerner if (ret) 3132bfff6873SLukas Czerner goto out; 3133bfff6873SLukas Czerner } 3134bfff6873SLukas Czerner 3135bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3136bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3137bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3138bfff6873SLukas Czerner 3139bfff6873SLukas Czerner sbi->s_li_request = elr; 314046e4690bSTao Ma /* 314146e4690bSTao Ma * set elr to NULL here since it has been inserted to 314246e4690bSTao Ma * the request_list and the removal and free of it is 314346e4690bSTao Ma * handled by ext4_clear_request_list from now on. 314446e4690bSTao Ma */ 314546e4690bSTao Ma elr = NULL; 3146bfff6873SLukas Czerner 3147bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3148bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3149bfff6873SLukas Czerner if (ret) 3150bfff6873SLukas Czerner goto out; 3151bfff6873SLukas Czerner } 3152bfff6873SLukas Czerner out: 3153bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3154beed5ecbSNicolas Kaiser if (ret) 3155bfff6873SLukas Czerner kfree(elr); 3156bfff6873SLukas Czerner return ret; 3157bfff6873SLukas Czerner } 3158bfff6873SLukas Czerner 3159bfff6873SLukas Czerner /* 3160bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3161bfff6873SLukas Czerner * module unload. 3162bfff6873SLukas Czerner */ 3163bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3164bfff6873SLukas Czerner { 3165bfff6873SLukas Czerner /* 3166bfff6873SLukas Czerner * If thread exited earlier 3167bfff6873SLukas Czerner * there's nothing to be done. 3168bfff6873SLukas Czerner */ 31698f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3170bfff6873SLukas Czerner return; 3171bfff6873SLukas Czerner 31728f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3173bfff6873SLukas Czerner } 3174bfff6873SLukas Czerner 317525ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 317625ed6e8aSDarrick J. Wong { 317725ed6e8aSDarrick J. Wong int ret = 1; 317825ed6e8aSDarrick J. Wong int compat, incompat; 317925ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 318025ed6e8aSDarrick J. Wong 31819aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3182db9ee220SDarrick J. Wong /* journal checksum v3 */ 318325ed6e8aSDarrick J. Wong compat = 0; 3184db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 318525ed6e8aSDarrick J. Wong } else { 318625ed6e8aSDarrick J. Wong /* journal checksum v1 */ 318725ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 318825ed6e8aSDarrick J. Wong incompat = 0; 318925ed6e8aSDarrick J. Wong } 319025ed6e8aSDarrick J. Wong 3191feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3192feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3193feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3194feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 319525ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 319625ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 319725ed6e8aSDarrick J. Wong compat, 0, 319825ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 319925ed6e8aSDarrick J. Wong incompat); 320025ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 320125ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 320225ed6e8aSDarrick J. Wong compat, 0, 320325ed6e8aSDarrick J. Wong incompat); 320425ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 320525ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 320625ed6e8aSDarrick J. Wong } else { 3207feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3208feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 320925ed6e8aSDarrick J. Wong } 321025ed6e8aSDarrick J. Wong 321125ed6e8aSDarrick J. Wong return ret; 321225ed6e8aSDarrick J. Wong } 321325ed6e8aSDarrick J. Wong 3214952fc18eSTheodore Ts'o /* 3215952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3216952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3217952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3218952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3219952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3220952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3221952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3222952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3223952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3224952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3225952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3226952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3227952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3228952fc18eSTheodore Ts'o */ 3229952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3230952fc18eSTheodore Ts'o char *buf) 3231952fc18eSTheodore Ts'o { 3232952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3233952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3234952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3235952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3236952fc18eSTheodore Ts'o int s, j, count = 0; 3237952fc18eSTheodore Ts'o 3238e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 32390548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 32400548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 32410548bbb8STheodore Ts'o 3242952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3243952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3244952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3245952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3246952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3247952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3248952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3249952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3250952fc18eSTheodore Ts'o count++; 3251952fc18eSTheodore Ts'o } 3252952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3253952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3254952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3255952fc18eSTheodore Ts'o count++; 3256952fc18eSTheodore Ts'o } 3257952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3258952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3259952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3260952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3261952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3262952fc18eSTheodore Ts'o count++; 3263952fc18eSTheodore Ts'o } 3264952fc18eSTheodore Ts'o if (i != grp) 3265952fc18eSTheodore Ts'o continue; 3266952fc18eSTheodore Ts'o s = 0; 3267952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3268952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3269952fc18eSTheodore Ts'o count++; 3270952fc18eSTheodore Ts'o } 3271c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 3272c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 3273c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 3274c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 3275c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 3276952fc18eSTheodore Ts'o } 3277c48ae41bSTheodore Ts'o count += j; 3278c48ae41bSTheodore Ts'o for (; j > 0; j--) 3279c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3280952fc18eSTheodore Ts'o } 3281952fc18eSTheodore Ts'o if (!count) 3282952fc18eSTheodore Ts'o return 0; 3283952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3284952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3285952fc18eSTheodore Ts'o } 3286952fc18eSTheodore Ts'o 3287952fc18eSTheodore Ts'o /* 3288952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3289952fc18eSTheodore Ts'o */ 3290952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3291952fc18eSTheodore Ts'o { 3292952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3293952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 32943c816dedSEric Whitney struct inode *j_inode; 32953c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 3296952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3297952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 32984fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3299952fc18eSTheodore Ts'o 3300952fc18eSTheodore Ts'o if (!buf) 3301952fc18eSTheodore Ts'o return -ENOMEM; 3302952fc18eSTheodore Ts'o 3303952fc18eSTheodore Ts'o /* 3304952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3305952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3306952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3307952fc18eSTheodore Ts'o */ 3308952fc18eSTheodore Ts'o 3309952fc18eSTheodore Ts'o /* 3310952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3311952fc18eSTheodore Ts'o */ 3312952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3313952fc18eSTheodore Ts'o 3314952fc18eSTheodore Ts'o /* 3315952fc18eSTheodore Ts'o * Add the overhead found in each block group 3316952fc18eSTheodore Ts'o */ 3317952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3318952fc18eSTheodore Ts'o int blks; 3319952fc18eSTheodore Ts'o 3320952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3321952fc18eSTheodore Ts'o overhead += blks; 3322952fc18eSTheodore Ts'o if (blks) 3323952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3324952fc18eSTheodore Ts'o cond_resched(); 3325952fc18eSTheodore Ts'o } 33263c816dedSEric Whitney 33273c816dedSEric Whitney /* 33283c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 33293c816dedSEric Whitney * loaded or not 33303c816dedSEric Whitney */ 3331b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3332810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 33333c816dedSEric Whitney else if (ext4_has_feature_journal(sb) && !sbi->s_journal) { 33343c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 33353c816dedSEric Whitney if (j_inode) { 33363c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 33373c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 33383c816dedSEric Whitney iput(j_inode); 33393c816dedSEric Whitney } else { 33403c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 33413c816dedSEric Whitney } 33423c816dedSEric Whitney } 3343952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3344952fc18eSTheodore Ts'o smp_wmb(); 3345952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3346952fc18eSTheodore Ts'o return 0; 3347952fc18eSTheodore Ts'o } 3348952fc18eSTheodore Ts'o 3349b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 335027dd4385SLukas Czerner { 335127dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 3352b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 335327dd4385SLukas Czerner 335427dd4385SLukas Czerner /* 335530fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 335630fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 335730fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 335830fac0f7SJan Kara * to keep ext2/3 backward compatibility. 335930fac0f7SJan Kara */ 3360e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 3361b5799018STheodore Ts'o return; 336230fac0f7SJan Kara /* 336327dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 336427dd4385SLukas Czerner * This should cover the situations where we can not afford to run 336527dd4385SLukas Czerner * out of space like for example punch hole, or converting 3366556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 336727dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 336827dd4385SLukas Czerner * very rare. 336927dd4385SLukas Czerner */ 3370b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 3371b5799018STheodore Ts'o sbi->s_cluster_bits); 337227dd4385SLukas Czerner 337327dd4385SLukas Czerner do_div(resv_clusters, 50); 337427dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 337527dd4385SLukas Czerner 3376b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 337727dd4385SLukas Czerner } 337827dd4385SLukas Czerner 3379617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3380ac27a0ecSDave Kleikamp { 3381*5e405595SDan Williams struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev); 3382d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3383ac27a0ecSDave Kleikamp struct buffer_head *bh; 3384617ba13bSMingming Cao struct ext4_super_block *es = NULL; 33855aee0f8aSTheodore Ts'o struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3386617ba13bSMingming Cao ext4_fsblk_t block; 3387617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 338870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3389ac27a0ecSDave Kleikamp unsigned long offset = 0; 3390ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3391ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3392ac27a0ecSDave Kleikamp struct inode *root; 33930390131bSFrank Mayhar const char *descr; 3394dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3395281b5995STheodore Ts'o int blocksize, clustersize; 33964ec11028STheodore Ts'o unsigned int db_count; 33974ec11028STheodore Ts'o unsigned int i; 3398281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3399bd81d8eeSLaurent Vivier __u64 blocks_count; 340007aa2ea1SLukas Czerner int err = 0; 3401b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3402bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3403ac27a0ecSDave Kleikamp 3404*5e405595SDan Williams sbi->s_daxdev = dax_dev; 34055aee0f8aSTheodore Ts'o if ((data && !orig_data) || !sbi) 34065aee0f8aSTheodore Ts'o goto out_free_base; 3407705895b6SPekka Enberg 3408705895b6SPekka Enberg sbi->s_blockgroup_lock = 3409705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 34105aee0f8aSTheodore Ts'o if (!sbi->s_blockgroup_lock) 34115aee0f8aSTheodore Ts'o goto out_free_base; 34125aee0f8aSTheodore Ts'o 3413ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 34142c0544b2STheodore Ts'o sbi->s_sb = sb; 3415240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3416d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3417f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3418f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3419f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3420ac27a0ecSDave Kleikamp 34219f6200bbSTheodore Ts'o /* Cleanup superblock name */ 3422ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 34239f6200bbSTheodore Ts'o 342407aa2ea1SLukas Czerner /* -EINVAL is default */ 3425dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3426617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3427ac27a0ecSDave Kleikamp if (!blocksize) { 3428b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3429ac27a0ecSDave Kleikamp goto out_fail; 3430ac27a0ecSDave Kleikamp } 3431ac27a0ecSDave Kleikamp 3432ac27a0ecSDave Kleikamp /* 3433617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3434ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3435ac27a0ecSDave Kleikamp */ 3436617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 343770bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 343870bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3439ac27a0ecSDave Kleikamp } else { 344070bbb3e0SAndrew Morton logical_sb_block = sb_block; 3441ac27a0ecSDave Kleikamp } 3442ac27a0ecSDave Kleikamp 3443a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3444b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3445ac27a0ecSDave Kleikamp goto out_fail; 3446ac27a0ecSDave Kleikamp } 3447ac27a0ecSDave Kleikamp /* 3448ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3449617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3450ac27a0ecSDave Kleikamp */ 34512716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3452ac27a0ecSDave Kleikamp sbi->s_es = es; 3453ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3454617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3455617ba13bSMingming Cao goto cantfind_ext4; 3456afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3457ac27a0ecSDave Kleikamp 3458feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3459e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 3460e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 3461363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3462feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3463feb0ab32SDarrick J. Wong 3464d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3465d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3466d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3467d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3468d25425f8SDarrick J. Wong silent = 1; 3469d25425f8SDarrick J. Wong goto cantfind_ext4; 3470d25425f8SDarrick J. Wong } 3471d25425f8SDarrick J. Wong 34720441984aSDarrick J. Wong /* Load the checksum driver */ 3473dec214d0STahsin Erdogan if (ext4_has_feature_metadata_csum(sb) || 3474dec214d0STahsin Erdogan ext4_has_feature_ea_inode(sb)) { 34750441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 34760441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 34770441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 34780441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 34790441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 34800441984aSDarrick J. Wong goto failed_mount; 34810441984aSDarrick J. Wong } 34820441984aSDarrick J. Wong } 34830441984aSDarrick J. Wong 3484a9c47317SDarrick J. Wong /* Check superblock checksum */ 3485a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3486a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3487a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3488a9c47317SDarrick J. Wong silent = 1; 34896a797d27SDarrick J. Wong ret = -EFSBADCRC; 3490a9c47317SDarrick J. Wong goto cantfind_ext4; 3491a9c47317SDarrick J. Wong } 3492a9c47317SDarrick J. Wong 3493a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3494e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 34958c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 3496dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 3497a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3498a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3499a9c47317SDarrick J. Wong 3500ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3501ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3502fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3503617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3504fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 350587f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3506fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3507617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3508fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3509ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3510fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 351103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3512fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 35132e7842b8SHugh Dickins #endif 351498c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 351598c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 351698c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 351798c1a759SDarrick J. Wong 3518617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3519fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3520617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3521fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3522617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3523fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3524ac27a0ecSDave Kleikamp 3525617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3526fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3527bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3528fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3529bb4f397aSAneesh Kumar K.V else 3530fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 353145f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3532fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 35338b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3534fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3535ac27a0ecSDave Kleikamp 353608cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 353708cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 353830773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 353930773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 354030773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3541ac27a0ecSDave Kleikamp 35428b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3543fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3544ac27a0ecSDave Kleikamp 35451e2462f9SMingming Cao /* 3546dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3547dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3548dd919b98SAneesh Kumar K.V */ 3549bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 35508b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3551fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3552dd919b98SAneesh Kumar K.V 355351ce6511SLukas Czerner /* 355451ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 355551ce6511SLukas Czerner * no mount option specified. 355651ce6511SLukas Czerner */ 355751ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 355851ce6511SLukas Czerner 35595aee0f8aSTheodore Ts'o if (sbi->s_es->s_mount_opts[0]) { 35605aee0f8aSTheodore Ts'o char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 35615aee0f8aSTheodore Ts'o sizeof(sbi->s_es->s_mount_opts), 35625aee0f8aSTheodore Ts'o GFP_KERNEL); 35635aee0f8aSTheodore Ts'o if (!s_mount_opts) 35645aee0f8aSTheodore Ts'o goto failed_mount; 35655aee0f8aSTheodore Ts'o if (!parse_options(s_mount_opts, sb, &journal_devnum, 35665aee0f8aSTheodore Ts'o &journal_ioprio, 0)) { 35678b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 35688b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 35695aee0f8aSTheodore Ts'o s_mount_opts); 35705aee0f8aSTheodore Ts'o } 35715aee0f8aSTheodore Ts'o kfree(s_mount_opts); 35728b67f04aSTheodore Ts'o } 35735a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3574b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3575661aa520SEric Sandeen &journal_ioprio, 0)) 3576ac27a0ecSDave Kleikamp goto failed_mount; 3577ac27a0ecSDave Kleikamp 357856889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 357956889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 358056889787STheodore Ts'o "with data=journal disables delayed " 358156889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 358256889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 358356889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 358456889787STheodore Ts'o "both data=journal and delalloc"); 358556889787STheodore Ts'o goto failed_mount; 358656889787STheodore Ts'o } 358756889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 358856889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 35896ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 359056889787STheodore Ts'o goto failed_mount; 359156889787STheodore Ts'o } 3592923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 3593923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 3594923ae0ffSRoss Zwisler "both data=journal and dax"); 3595923ae0ffSRoss Zwisler goto failed_mount; 3596923ae0ffSRoss Zwisler } 359773b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 359873b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 359973b92a2aSSergey Karamov "encrypted files will use data=ordered " 360073b92a2aSSergey Karamov "instead of data journaling mode"); 360173b92a2aSSergey Karamov } 360256889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 360356889787STheodore Ts'o clear_opt(sb, DELALLOC); 3604001e4a87STejun Heo } else { 3605001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 360656889787STheodore Ts'o } 360756889787STheodore Ts'o 3608ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3609482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3610ac27a0ecSDave Kleikamp 3611617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3612e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 3613e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 3614e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 3615b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3616b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3617b31e1552SEric Sandeen "running e2fsck is recommended"); 3618469108ffSTheodore Tso 3619ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3620ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3621e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 3622ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3623ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3624ed3654ebSTheodore Ts'o goto failed_mount; 3625ed3654ebSTheodore Ts'o } 3626dec214d0STahsin Erdogan 3627dec214d0STahsin Erdogan /* 3628dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 3629dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 3630dec214d0STahsin Erdogan */ 3631dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 3632dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 3633dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 3634dec214d0STahsin Erdogan goto failed_mount; 3635dec214d0STahsin Erdogan } 3636ed3654ebSTheodore Ts'o } 3637ed3654ebSTheodore Ts'o 36382035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 36392035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 36402035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 36412035e776STheodore Ts'o "using the ext4 subsystem"); 36422035e776STheodore Ts'o else { 36432035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 36442035e776STheodore Ts'o "to feature incompatibilities"); 36452035e776STheodore Ts'o goto failed_mount; 36462035e776STheodore Ts'o } 36472035e776STheodore Ts'o } 36482035e776STheodore Ts'o 36492035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 36502035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 36512035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 36522035e776STheodore Ts'o "using the ext4 subsystem"); 36532035e776STheodore Ts'o else { 36542035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 36552035e776STheodore Ts'o "to feature incompatibilities"); 36562035e776STheodore Ts'o goto failed_mount; 36572035e776STheodore Ts'o } 36582035e776STheodore Ts'o } 36592035e776STheodore Ts'o 3660469108ffSTheodore Tso /* 3661ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3662ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3663ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3664ac27a0ecSDave Kleikamp */ 3665a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3666ac27a0ecSDave Kleikamp goto failed_mount; 3667a13fb1a4SEric Sandeen 3668261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3669617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3670617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3671b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 36728cdf3372STheodore Ts'o "Unsupported filesystem blocksize %d (%d log_block_size)", 36738cdf3372STheodore Ts'o blocksize, le32_to_cpu(es->s_log_block_size)); 36748cdf3372STheodore Ts'o goto failed_mount; 36758cdf3372STheodore Ts'o } 36768cdf3372STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 36778cdf3372STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 36788cdf3372STheodore Ts'o ext4_msg(sb, KERN_ERR, 36798cdf3372STheodore Ts'o "Invalid log block size: %u", 36808cdf3372STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 3681ac27a0ecSDave Kleikamp goto failed_mount; 3682ac27a0ecSDave Kleikamp } 3683ac27a0ecSDave Kleikamp 36845b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 36855b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 36865b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 36875b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 36885b9554dcSTheodore Ts'o goto failed_mount; 36895b9554dcSTheodore Ts'o } 36905b9554dcSTheodore Ts'o 3691923ae0ffSRoss Zwisler if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { 369287eefeb4SToshi Kani err = bdev_dax_supported(sb, blocksize); 369387eefeb4SToshi Kani if (err) 3694923ae0ffSRoss Zwisler goto failed_mount; 3695923ae0ffSRoss Zwisler } 3696923ae0ffSRoss Zwisler 3697e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 36986ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 36996ddb2447STheodore Ts'o es->s_encryption_level); 37006ddb2447STheodore Ts'o goto failed_mount; 37016ddb2447STheodore Ts'o } 37026ddb2447STheodore Ts'o 3703ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3704ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3705ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3706b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3707ce40733cSAneesh Kumar K.V blocksize); 3708ac27a0ecSDave Kleikamp goto failed_mount; 3709ac27a0ecSDave Kleikamp } 3710ac27a0ecSDave Kleikamp 3711ac27a0ecSDave Kleikamp brelse(bh); 371270bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 371370bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3714a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3715ac27a0ecSDave Kleikamp if (!bh) { 3716b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3717b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3718ac27a0ecSDave Kleikamp goto failed_mount; 3719ac27a0ecSDave Kleikamp } 37202716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3721ac27a0ecSDave Kleikamp sbi->s_es = es; 3722617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3723b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3724b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3725ac27a0ecSDave Kleikamp goto failed_mount; 3726ac27a0ecSDave Kleikamp } 3727ac27a0ecSDave Kleikamp } 3728ac27a0ecSDave Kleikamp 3729e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 3730f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3731f287a1a5STheodore Ts'o has_huge_files); 3732f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3733ac27a0ecSDave Kleikamp 3734617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3735617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3736617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3737ac27a0ecSDave Kleikamp } else { 3738ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3739ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3740617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 37411330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3742ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3743b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3744b31e1552SEric Sandeen "unsupported inode size: %d", 3745ac27a0ecSDave Kleikamp sbi->s_inode_size); 3746ac27a0ecSDave Kleikamp goto failed_mount; 3747ac27a0ecSDave Kleikamp } 3748ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3749ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3750ac27a0ecSDave Kleikamp } 37510b8e58a1SAndreas Dilger 37520d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 3753e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 37548fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 37550d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3756d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3757b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3758b31e1552SEric Sandeen "unsupported descriptor size %lu", 37590d1ee42fSAlexandre Ratchov sbi->s_desc_size); 37600d1ee42fSAlexandre Ratchov goto failed_mount; 37610d1ee42fSAlexandre Ratchov } 37620d1ee42fSAlexandre Ratchov } else 37630d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 37640b8e58a1SAndreas Dilger 3765ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3766ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 37670b8e58a1SAndreas Dilger 3768617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3769ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3770617ba13bSMingming Cao goto cantfind_ext4; 3771cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 3772cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 3773cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 3774cd6bb35bSTheodore Ts'o sbi->s_blocks_per_group); 3775cd6bb35bSTheodore Ts'o goto failed_mount; 3776cd6bb35bSTheodore Ts'o } 3777ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3778ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 37790d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3780ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3781ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3782e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3783e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 37840b8e58a1SAndreas Dilger 3785ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3786ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3787ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3788e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 3789f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3790f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3791f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3792f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3793f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 379423301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 379523301410STheodore Ts'o es->s_flags |= 379623301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3797f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3798f99b2589STheodore Ts'o #else 379923301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 380023301410STheodore Ts'o es->s_flags |= 380123301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3802f99b2589STheodore Ts'o #endif 3803f99b2589STheodore Ts'o } 380423301410STheodore Ts'o } 3805ac27a0ecSDave Kleikamp 3806281b5995STheodore Ts'o /* Handle clustersize */ 3807281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3808e2b911c5SDarrick J. Wong has_bigalloc = ext4_has_feature_bigalloc(sb); 3809281b5995STheodore Ts'o if (has_bigalloc) { 3810281b5995STheodore Ts'o if (clustersize < blocksize) { 3811281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3812281b5995STheodore Ts'o "cluster size (%d) smaller than " 3813281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3814281b5995STheodore Ts'o goto failed_mount; 3815281b5995STheodore Ts'o } 38168cdf3372STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 38178cdf3372STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 38188cdf3372STheodore Ts'o ext4_msg(sb, KERN_ERR, 38198cdf3372STheodore Ts'o "Invalid log cluster size: %u", 38208cdf3372STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 38218cdf3372STheodore Ts'o goto failed_mount; 38228cdf3372STheodore Ts'o } 3823281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3824281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3825281b5995STheodore Ts'o sbi->s_clusters_per_group = 3826281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3827281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3828281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3829281b5995STheodore Ts'o "#clusters per group too big: %lu", 3830281b5995STheodore Ts'o sbi->s_clusters_per_group); 3831281b5995STheodore Ts'o goto failed_mount; 3832281b5995STheodore Ts'o } 3833281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3834281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3835281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3836281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3837281b5995STheodore Ts'o sbi->s_blocks_per_group, 3838281b5995STheodore Ts'o sbi->s_clusters_per_group); 3839281b5995STheodore Ts'o goto failed_mount; 3840281b5995STheodore Ts'o } 3841281b5995STheodore Ts'o } else { 3842281b5995STheodore Ts'o if (clustersize != blocksize) { 3843281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3844281b5995STheodore Ts'o "block size (%d)", clustersize, 3845281b5995STheodore Ts'o blocksize); 3846281b5995STheodore Ts'o clustersize = blocksize; 3847281b5995STheodore Ts'o } 3848ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3849b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3850b31e1552SEric Sandeen "#blocks per group too big: %lu", 3851ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3852ac27a0ecSDave Kleikamp goto failed_mount; 3853ac27a0ecSDave Kleikamp } 3854281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3855281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3856281b5995STheodore Ts'o } 3857281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3858281b5995STheodore Ts'o 3859960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3860960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3861960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3862960fd856STheodore Ts'o 3863bf43d84bSEric Sandeen /* 3864bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3865bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3866bf43d84bSEric Sandeen */ 38675a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 386830ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 38695a9ae68aSDarrick J. Wong if (err) { 3870b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3871bf43d84bSEric Sandeen " too large to mount safely on this system"); 3872ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 387390c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3874ac27a0ecSDave Kleikamp goto failed_mount; 3875ac27a0ecSDave Kleikamp } 3876ac27a0ecSDave Kleikamp 3877617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3878617ba13bSMingming Cao goto cantfind_ext4; 3879e7c95593SEric Sandeen 38800f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 38810f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 38820f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3883b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3884b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 38850f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 38860f2ddca6SFrom: Thiemo Nagel goto failed_mount; 38870f2ddca6SFrom: Thiemo Nagel } 38880f2ddca6SFrom: Thiemo Nagel 38894ec11028STheodore Ts'o /* 38904ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 38914ec11028STheodore Ts'o * of the filesystem. 38924ec11028STheodore Ts'o */ 38934ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3894b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3895b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3896e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 38974ec11028STheodore Ts'o ext4_blocks_count(es)); 3898e7c95593SEric Sandeen goto failed_mount; 3899e7c95593SEric Sandeen } 3900bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3901bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3902bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3903bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 39044ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3905b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 39064ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3907b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 39084ec11028STheodore Ts'o ext4_blocks_count(es), 39094ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 39104ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 39114ec11028STheodore Ts'o goto failed_mount; 39124ec11028STheodore Ts'o } 3913bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3914fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3915fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3916617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3917617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 39183a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 39192ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 39203a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 39213a4b77cdSEryu Guan "first meta block group too large: %u " 39223a4b77cdSEryu Guan "(group descriptor block count %u)", 39233a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 39243a4b77cdSEryu Guan goto failed_mount; 39253a4b77cdSEryu Guan } 39263a4b77cdSEryu Guan } 3927a7c3e901SMichal Hocko sbi->s_group_desc = kvmalloc(db_count * 3928f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3929ac27a0ecSDave Kleikamp GFP_KERNEL); 3930ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3931b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 39322cde417dSTheodore Ts'o ret = -ENOMEM; 3933ac27a0ecSDave Kleikamp goto failed_mount; 3934ac27a0ecSDave Kleikamp } 3935ac27a0ecSDave Kleikamp 3936705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3937ac27a0ecSDave Kleikamp 393885c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 393985c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 394085c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 394185c8f176SAndrew Perepechko sb_breadahead(sb, block); 394285c8f176SAndrew Perepechko } 394385c8f176SAndrew Perepechko 3944ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 394570bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3946a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3947ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3948b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3949b31e1552SEric Sandeen "can't read group descriptor %d", i); 3950ac27a0ecSDave Kleikamp db_count = i; 3951ac27a0ecSDave Kleikamp goto failed_mount2; 3952ac27a0ecSDave Kleikamp } 3953ac27a0ecSDave Kleikamp } 3954829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 3955b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 39566a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 3957f9ae9cf5STheodore Ts'o goto failed_mount2; 3958ac27a0ecSDave Kleikamp } 3959772cb7c8SJose R. Santos 3960f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 3961ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3962ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3963ac27a0ecSDave Kleikamp 396404ecddb7SJan Mrazek setup_timer(&sbi->s_err_report, print_daily_error_info, 396504ecddb7SJan Mrazek (unsigned long) sb); 396604496411STao Ma 3967a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3968eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 3969ce7e010aSTheodore Ts'o goto failed_mount3; 3970ce7e010aSTheodore Ts'o 3971c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 397267a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3973c9de560dSAlex Tomas 3974f9ae9cf5STheodore Ts'o /* 3975f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 3976f9ae9cf5STheodore Ts'o */ 3977f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 3978617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3979617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3980a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 3981ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3982617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3983e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 39841fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 3985262b4662SJan Kara else 3986262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 3987689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 3988ac27a0ecSDave Kleikamp #endif 398985787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3990f2fa2ffcSAneesh Kumar K.V 3991ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 39923b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3993ac27a0ecSDave Kleikamp 3994ac27a0ecSDave Kleikamp sb->s_root = NULL; 3995ac27a0ecSDave Kleikamp 3996ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3997e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 3998ac27a0ecSDave Kleikamp 3999e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb) && !(sb->s_flags & MS_RDONLY)) 4000c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 400150460fe8SDarrick J. Wong goto failed_mount3a; 4002c5e06d10SJohann Lombardi 4003ac27a0ecSDave Kleikamp /* 4004ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 4005ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 4006ac27a0ecSDave Kleikamp */ 4007e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 40084753d8a2STheodore Ts'o err = ext4_load_journal(sb, es, journal_devnum); 40094753d8a2STheodore Ts'o if (err) 401050460fe8SDarrick J. Wong goto failed_mount3a; 40110390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 4012e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 4013b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 4014b31e1552SEric Sandeen "suppressed and not mounted read-only"); 4015744692dcSJiaying Zhang goto failed_mount_wq; 4016ac27a0ecSDave Kleikamp } else { 40171e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 40181e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 40191e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 40201e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 40211e381f60SDmitry Monakhov goto failed_mount_wq; 40221e381f60SDmitry Monakhov } 40231e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 40241e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 40251e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 40261e381f60SDmitry Monakhov goto failed_mount_wq; 40271e381f60SDmitry Monakhov } 40281e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 40291e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 40301e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 40311e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 40321e381f60SDmitry Monakhov goto failed_mount_wq; 40331e381f60SDmitry Monakhov } 40341e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 40351e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 40361e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 40371e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 40381e381f60SDmitry Monakhov goto failed_mount_wq; 40391e381f60SDmitry Monakhov } 40401e381f60SDmitry Monakhov sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; 40411e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 4042fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 40430390131bSFrank Mayhar sbi->s_journal = NULL; 40440390131bSFrank Mayhar needs_recovery = 0; 40450390131bSFrank Mayhar goto no_journal; 4046ac27a0ecSDave Kleikamp } 4047ac27a0ecSDave Kleikamp 4048e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 4049eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4050eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 4051b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4052744692dcSJiaying Zhang goto failed_mount_wq; 4053eb40a09cSJose R. Santos } 4054eb40a09cSJose R. Santos 405525ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 405625ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 405725ed6e8aSDarrick J. Wong "feature set"); 405825ed6e8aSDarrick J. Wong goto failed_mount_wq; 4059d4da6c9cSLinus Torvalds } 4060818d276cSGirish Shilamkar 4061ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4062ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4063ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4064ac27a0ecSDave Kleikamp case 0: 4065ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 406663f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 406763f57933SAndrew Morton * cope, else JOURNAL_DATA 406863f57933SAndrew Morton */ 4069dab291afSMingming Cao if (jbd2_journal_check_available_features 4070dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 4071fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4072ac27a0ecSDave Kleikamp else 4073fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4074ac27a0ecSDave Kleikamp break; 4075ac27a0ecSDave Kleikamp 4076617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4077617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4078dab291afSMingming Cao if (!jbd2_journal_check_available_features 4079dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4080b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4081b31e1552SEric Sandeen "requested data journaling mode"); 4082744692dcSJiaying Zhang goto failed_mount_wq; 4083ac27a0ecSDave Kleikamp } 4084ac27a0ecSDave Kleikamp default: 4085ac27a0ecSDave Kleikamp break; 4086ac27a0ecSDave Kleikamp } 4087ab04df78SJan Kara 4088ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 4089ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 4090ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 4091ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 4092ab04df78SJan Kara goto failed_mount_wq; 4093ab04df78SJan Kara } 4094ab04df78SJan Kara 4095b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4096ac27a0ecSDave Kleikamp 409718aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 409818aadd47SBobi Jam 4099ce7e010aSTheodore Ts'o no_journal: 4100cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 410147387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 410247387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 4103cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 4104cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 41059c191f70ST Makphaibulchoke goto failed_mount_wq; 41069c191f70ST Makphaibulchoke } 41079c191f70ST Makphaibulchoke 4108dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4109dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 4110dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 4111dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4112dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 4113dec214d0STahsin Erdogan goto failed_mount_wq; 4114dec214d0STahsin Erdogan } 4115dec214d0STahsin Erdogan } 4116cdb7ee4cSTahsin Erdogan } 4117dec214d0STahsin Erdogan 4118e2b911c5SDarrick J. Wong if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && 411909cbfeafSKirill A. Shutemov (blocksize != PAGE_SIZE)) { 41201cb767cdSTheodore Ts'o ext4_msg(sb, KERN_ERR, 41211cb767cdSTheodore Ts'o "Unsupported blocksize for fs encryption"); 41221cb767cdSTheodore Ts'o goto failed_mount_wq; 41231cb767cdSTheodore Ts'o } 41241cb767cdSTheodore Ts'o 4125e2b911c5SDarrick J. Wong if (DUMMY_ENCRYPTION_ENABLED(sbi) && !(sb->s_flags & MS_RDONLY) && 4126e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 4127e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 41286ddb2447STheodore Ts'o ext4_commit_super(sb, 1); 41296ddb2447STheodore Ts'o } 41306ddb2447STheodore Ts'o 4131fd89d5f2STejun Heo /* 4132952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4133952fc18eSTheodore Ts'o * superblock if present. 4134952fc18eSTheodore Ts'o */ 4135952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4136952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4137952fc18eSTheodore Ts'o else { 413807aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 413907aa2ea1SLukas Czerner if (err) 4140952fc18eSTheodore Ts'o goto failed_mount_wq; 4141952fc18eSTheodore Ts'o } 4142952fc18eSTheodore Ts'o 4143952fc18eSTheodore Ts'o /* 4144fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4145fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4146fd89d5f2STejun Heo */ 41472e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 41482e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 41492e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 41502e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 415107aa2ea1SLukas Czerner ret = -ENOMEM; 41522e8fa54eSJan Kara goto failed_mount4; 41532e8fa54eSJan Kara } 41542e8fa54eSJan Kara 4155ac27a0ecSDave Kleikamp /* 4156dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4157ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4158ac27a0ecSDave Kleikamp */ 4159ac27a0ecSDave Kleikamp 41601d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 41611d1fe1eeSDavid Howells if (IS_ERR(root)) { 4162b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 41631d1fe1eeSDavid Howells ret = PTR_ERR(root); 416432a9bb57SManish Katiyar root = NULL; 4165ac27a0ecSDave Kleikamp goto failed_mount4; 4166ac27a0ecSDave Kleikamp } 4167ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4168b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 416994bf608aSAl Viro iput(root); 4170ac27a0ecSDave Kleikamp goto failed_mount4; 4171ac27a0ecSDave Kleikamp } 417248fde701SAl Viro sb->s_root = d_make_root(root); 41731d1fe1eeSDavid Howells if (!sb->s_root) { 4174b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 41751d1fe1eeSDavid Howells ret = -ENOMEM; 41761d1fe1eeSDavid Howells goto failed_mount4; 41771d1fe1eeSDavid Howells } 4178ac27a0ecSDave Kleikamp 41797e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 41807e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 4181ef7f3835SKalpak Shah 4182ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4183670e9875STheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE && 4184670e9875STheodore Ts'o sbi->s_want_extra_isize == 0) { 4185ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4186ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4187e2b911c5SDarrick J. Wong if (ext4_has_feature_extra_isize(sb)) { 4188ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4189ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4190ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4191ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4192ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4193ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4194ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4195ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4196ef7f3835SKalpak Shah } 4197ef7f3835SKalpak Shah } 4198ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4199ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4200ef7f3835SKalpak Shah sbi->s_inode_size) { 4201ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4202ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4203b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4204b31e1552SEric Sandeen "available"); 4205ef7f3835SKalpak Shah } 4206ef7f3835SKalpak Shah 4207b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 420827dd4385SLukas Czerner 42096fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 42106fd058f7STheodore Ts'o if (err) { 4211b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4212fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4213f9ae9cf5STheodore Ts'o goto failed_mount4a; 4214f9ae9cf5STheodore Ts'o } 4215f9ae9cf5STheodore Ts'o 4216f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4217f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4218f9ae9cf5STheodore Ts'o if (err) { 4219f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4220f9ae9cf5STheodore Ts'o err); 4221dcf2d804STao Ma goto failed_mount5; 4222c2774d84SAneesh Kumar K.V } 4223c2774d84SAneesh Kumar K.V 4224d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4225d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4226d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4227908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4228908c7f19STejun Heo GFP_KERNEL); 4229d5e03cbbSTheodore Ts'o if (!err) { 4230d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4231d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4232908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4233908c7f19STejun Heo GFP_KERNEL); 4234d5e03cbbSTheodore Ts'o } 4235d5e03cbbSTheodore Ts'o if (!err) 4236d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4237908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4238d5e03cbbSTheodore Ts'o if (!err) 4239908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4240908c7f19STejun Heo GFP_KERNEL); 4241c8585c6fSDaeho Jeong if (!err) 4242c8585c6fSDaeho Jeong err = percpu_init_rwsem(&sbi->s_journal_flag_rwsem); 4243c8585c6fSDaeho Jeong 4244d5e03cbbSTheodore Ts'o if (err) { 4245d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4246d5e03cbbSTheodore Ts'o goto failed_mount6; 4247d5e03cbbSTheodore Ts'o } 4248d5e03cbbSTheodore Ts'o 4249e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 4250d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4251d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4252d5e03cbbSTheodore Ts'o "unable to initialize " 4253d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4254d5e03cbbSTheodore Ts'o goto failed_mount6; 4255d5e03cbbSTheodore Ts'o } 4256d5e03cbbSTheodore Ts'o 4257bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4258bfff6873SLukas Czerner if (err) 4259dcf2d804STao Ma goto failed_mount6; 4260bfff6873SLukas Czerner 4261b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 4262dcf2d804STao Ma if (err) 4263dcf2d804STao Ma goto failed_mount7; 42643197ebdbSTheodore Ts'o 42659b2ff357SJan Kara #ifdef CONFIG_QUOTA 42669b2ff357SJan Kara /* Enable quota usage during mount. */ 4267e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !(sb->s_flags & MS_RDONLY)) { 42689b2ff357SJan Kara err = ext4_enable_quotas(sb); 42699b2ff357SJan Kara if (err) 42709b2ff357SJan Kara goto failed_mount8; 42719b2ff357SJan Kara } 42729b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 42739b2ff357SJan Kara 4274617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4275617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4276617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 42770390131bSFrank Mayhar if (needs_recovery) { 4278b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4279617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 42800390131bSFrank Mayhar } 42810390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 42820390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 42830390131bSFrank Mayhar descr = " journalled data mode"; 42840390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 42850390131bSFrank Mayhar descr = " ordered data mode"; 42860390131bSFrank Mayhar else 42870390131bSFrank Mayhar descr = " writeback data mode"; 42880390131bSFrank Mayhar } else 42890390131bSFrank Mayhar descr = "out journal"; 42900390131bSFrank Mayhar 429179add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 429279add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 429379add3a3SLukas Czerner if (!blk_queue_discard(q)) 429479add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 429579add3a3SLukas Czerner "mounting with \"discard\" option, but " 429679add3a3SLukas Czerner "the device does not support discard"); 429779add3a3SLukas Czerner } 429879add3a3SLukas Czerner 4299e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 4300d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 43015aee0f8aSTheodore Ts'o "Opts: %.*s%s%s", descr, 43025aee0f8aSTheodore Ts'o (int) sizeof(sbi->s_es->s_mount_opts), 43035aee0f8aSTheodore Ts'o sbi->s_es->s_mount_opts, 43048b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4305ac27a0ecSDave Kleikamp 430666e61a9eSTheodore Ts'o if (es->s_error_count) 430766e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4308ac27a0ecSDave Kleikamp 4309efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4310efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4311efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4312efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4313efbed4dcSTheodore Ts'o 4314d4c402d9SCurt Wohlgemuth kfree(orig_data); 4315ac27a0ecSDave Kleikamp return 0; 4316ac27a0ecSDave Kleikamp 4317617ba13bSMingming Cao cantfind_ext4: 4318ac27a0ecSDave Kleikamp if (!silent) 4319b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4320ac27a0ecSDave Kleikamp goto failed_mount; 4321ac27a0ecSDave Kleikamp 432272ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 432372ba7450STheodore Ts'o failed_mount8: 4324ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 432572ba7450STheodore Ts'o #endif 4326dcf2d804STao Ma failed_mount7: 4327dcf2d804STao Ma ext4_unregister_li_request(sb); 4328dcf2d804STao Ma failed_mount6: 4329f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4330d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4331b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 4332d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4333d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4334d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4335d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 433600764937SAzat Khuzhin failed_mount5: 4337f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4338f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4339f9ae9cf5STheodore Ts'o failed_mount4a: 434094bf608aSAl Viro dput(sb->s_root); 434132a9bb57SManish Katiyar sb->s_root = NULL; 434294bf608aSAl Viro failed_mount4: 4343b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 43442e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 43452e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 43464c0425ffSMingming Cao failed_mount_wq: 4347dec214d0STahsin Erdogan if (sbi->s_ea_inode_cache) { 4348dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 4349dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 4350dec214d0STahsin Erdogan } 435147387409STahsin Erdogan if (sbi->s_ea_block_cache) { 435247387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 435347387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 435482939d79SJan Kara } 43550390131bSFrank Mayhar if (sbi->s_journal) { 4356dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 435747b4a50bSJan Kara sbi->s_journal = NULL; 43580390131bSFrank Mayhar } 435950460fe8SDarrick J. Wong failed_mount3a: 4360d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4361eb68d0e2SZheng Liu failed_mount3: 43629105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4363c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4364c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4365ac27a0ecSDave Kleikamp failed_mount2: 4366ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4367ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4368b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4369ac27a0ecSDave Kleikamp failed_mount: 43700441984aSDarrick J. Wong if (sbi->s_chksum_driver) 43710441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4372ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4373a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4374ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4375ac27a0ecSDave Kleikamp #endif 4376617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4377ac27a0ecSDave Kleikamp brelse(bh); 4378ac27a0ecSDave Kleikamp out_fail: 4379ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4380f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 43815aee0f8aSTheodore Ts'o out_free_base: 4382ac27a0ecSDave Kleikamp kfree(sbi); 4383d4c402d9SCurt Wohlgemuth kfree(orig_data); 4384*5e405595SDan Williams fs_put_dax(dax_dev); 438507aa2ea1SLukas Czerner return err ? err : ret; 4386ac27a0ecSDave Kleikamp } 4387ac27a0ecSDave Kleikamp 4388ac27a0ecSDave Kleikamp /* 4389ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4390ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4391ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4392ac27a0ecSDave Kleikamp */ 4393617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4394ac27a0ecSDave Kleikamp { 4395617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4396ac27a0ecSDave Kleikamp 4397ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 439830773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 439930773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4400ac27a0ecSDave Kleikamp 4401a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4402ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4403dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4404ac27a0ecSDave Kleikamp else 4405dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 44065bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 44075bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 44085bf5683aSHidehiro Kawai else 44095bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4410a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4411ac27a0ecSDave Kleikamp } 4412ac27a0ecSDave Kleikamp 4413c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 4414ac27a0ecSDave Kleikamp unsigned int journal_inum) 4415ac27a0ecSDave Kleikamp { 4416ac27a0ecSDave Kleikamp struct inode *journal_inode; 4417ac27a0ecSDave Kleikamp 4418c6cb7e77SEric Whitney /* 4419c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 4420c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 4421c6cb7e77SEric Whitney * will try to delete it. 4422c6cb7e77SEric Whitney */ 44231d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 44241d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4425b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4426ac27a0ecSDave Kleikamp return NULL; 4427ac27a0ecSDave Kleikamp } 4428ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4429ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4430ac27a0ecSDave Kleikamp iput(journal_inode); 4431b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4432ac27a0ecSDave Kleikamp return NULL; 4433ac27a0ecSDave Kleikamp } 4434ac27a0ecSDave Kleikamp 4435e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4436ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 44371d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4438b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4439ac27a0ecSDave Kleikamp iput(journal_inode); 4440ac27a0ecSDave Kleikamp return NULL; 4441ac27a0ecSDave Kleikamp } 4442c6cb7e77SEric Whitney return journal_inode; 4443c6cb7e77SEric Whitney } 4444c6cb7e77SEric Whitney 4445c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 4446c6cb7e77SEric Whitney unsigned int journal_inum) 4447c6cb7e77SEric Whitney { 4448c6cb7e77SEric Whitney struct inode *journal_inode; 4449c6cb7e77SEric Whitney journal_t *journal; 4450c6cb7e77SEric Whitney 4451c6cb7e77SEric Whitney BUG_ON(!ext4_has_feature_journal(sb)); 4452c6cb7e77SEric Whitney 4453c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 4454c6cb7e77SEric Whitney if (!journal_inode) 4455c6cb7e77SEric Whitney return NULL; 4456ac27a0ecSDave Kleikamp 4457dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4458ac27a0ecSDave Kleikamp if (!journal) { 4459b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4460ac27a0ecSDave Kleikamp iput(journal_inode); 4461ac27a0ecSDave Kleikamp return NULL; 4462ac27a0ecSDave Kleikamp } 4463ac27a0ecSDave Kleikamp journal->j_private = sb; 4464617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4465ac27a0ecSDave Kleikamp return journal; 4466ac27a0ecSDave Kleikamp } 4467ac27a0ecSDave Kleikamp 4468617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4469ac27a0ecSDave Kleikamp dev_t j_dev) 4470ac27a0ecSDave Kleikamp { 4471ac27a0ecSDave Kleikamp struct buffer_head *bh; 4472ac27a0ecSDave Kleikamp journal_t *journal; 4473617ba13bSMingming Cao ext4_fsblk_t start; 4474617ba13bSMingming Cao ext4_fsblk_t len; 4475ac27a0ecSDave Kleikamp int hblock, blocksize; 4476617ba13bSMingming Cao ext4_fsblk_t sb_block; 4477ac27a0ecSDave Kleikamp unsigned long offset; 4478617ba13bSMingming Cao struct ext4_super_block *es; 4479ac27a0ecSDave Kleikamp struct block_device *bdev; 4480ac27a0ecSDave Kleikamp 4481e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 44820390131bSFrank Mayhar 4483b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4484ac27a0ecSDave Kleikamp if (bdev == NULL) 4485ac27a0ecSDave Kleikamp return NULL; 4486ac27a0ecSDave Kleikamp 4487ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4488e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4489ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4490b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4491b31e1552SEric Sandeen "blocksize too small for journal device"); 4492ac27a0ecSDave Kleikamp goto out_bdev; 4493ac27a0ecSDave Kleikamp } 4494ac27a0ecSDave Kleikamp 4495617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4496617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4497ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4498ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4499b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4500b31e1552SEric Sandeen "external journal"); 4501ac27a0ecSDave Kleikamp goto out_bdev; 4502ac27a0ecSDave Kleikamp } 4503ac27a0ecSDave Kleikamp 45042716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4505617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4506ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4507617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4508b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4509b31e1552SEric Sandeen "bad superblock"); 4510ac27a0ecSDave Kleikamp brelse(bh); 4511ac27a0ecSDave Kleikamp goto out_bdev; 4512ac27a0ecSDave Kleikamp } 4513ac27a0ecSDave Kleikamp 4514df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4515df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4516df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4517df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4518df4763beSDarrick J. Wong "corrupt superblock"); 4519df4763beSDarrick J. Wong brelse(bh); 4520df4763beSDarrick J. Wong goto out_bdev; 4521df4763beSDarrick J. Wong } 4522df4763beSDarrick J. Wong 4523617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4524b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4525ac27a0ecSDave Kleikamp brelse(bh); 4526ac27a0ecSDave Kleikamp goto out_bdev; 4527ac27a0ecSDave Kleikamp } 4528ac27a0ecSDave Kleikamp 4529bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4530ac27a0ecSDave Kleikamp start = sb_block + 1; 4531ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4532ac27a0ecSDave Kleikamp 4533dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4534ac27a0ecSDave Kleikamp start, len, blocksize); 4535ac27a0ecSDave Kleikamp if (!journal) { 4536b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4537ac27a0ecSDave Kleikamp goto out_bdev; 4538ac27a0ecSDave Kleikamp } 4539ac27a0ecSDave Kleikamp journal->j_private = sb; 4540dfec8a14SMike Christie ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4541ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4542ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4543b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4544ac27a0ecSDave Kleikamp goto out_journal; 4545ac27a0ecSDave Kleikamp } 4546ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4547b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4548b31e1552SEric Sandeen "user (unsupported) - %d", 4549ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4550ac27a0ecSDave Kleikamp goto out_journal; 4551ac27a0ecSDave Kleikamp } 4552617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4553617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4554ac27a0ecSDave Kleikamp return journal; 45550b8e58a1SAndreas Dilger 4556ac27a0ecSDave Kleikamp out_journal: 4557dab291afSMingming Cao jbd2_journal_destroy(journal); 4558ac27a0ecSDave Kleikamp out_bdev: 4559617ba13bSMingming Cao ext4_blkdev_put(bdev); 4560ac27a0ecSDave Kleikamp return NULL; 4561ac27a0ecSDave Kleikamp } 4562ac27a0ecSDave Kleikamp 4563617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4564617ba13bSMingming Cao struct ext4_super_block *es, 4565ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4566ac27a0ecSDave Kleikamp { 4567ac27a0ecSDave Kleikamp journal_t *journal; 4568ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4569ac27a0ecSDave Kleikamp dev_t journal_dev; 4570ac27a0ecSDave Kleikamp int err = 0; 4571ac27a0ecSDave Kleikamp int really_read_only; 4572ac27a0ecSDave Kleikamp 4573e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 45740390131bSFrank Mayhar 4575ac27a0ecSDave Kleikamp if (journal_devnum && 4576ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4577b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4578b31e1552SEric Sandeen "numbers have changed"); 4579ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4580ac27a0ecSDave Kleikamp } else 4581ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4582ac27a0ecSDave Kleikamp 4583ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4584ac27a0ecSDave Kleikamp 4585ac27a0ecSDave Kleikamp /* 4586ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4587ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4588ac27a0ecSDave Kleikamp * can get read-write access to the device. 4589ac27a0ecSDave Kleikamp */ 4590e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 4591ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4592b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4593b31e1552SEric Sandeen "required on readonly filesystem"); 4594ac27a0ecSDave Kleikamp if (really_read_only) { 4595b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4596b31e1552SEric Sandeen "unavailable, cannot proceed"); 4597ac27a0ecSDave Kleikamp return -EROFS; 4598ac27a0ecSDave Kleikamp } 4599b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4600b31e1552SEric Sandeen "be enabled during recovery"); 4601ac27a0ecSDave Kleikamp } 4602ac27a0ecSDave Kleikamp } 4603ac27a0ecSDave Kleikamp 4604ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4605b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4606b31e1552SEric Sandeen "and inode journals!"); 4607ac27a0ecSDave Kleikamp return -EINVAL; 4608ac27a0ecSDave Kleikamp } 4609ac27a0ecSDave Kleikamp 4610ac27a0ecSDave Kleikamp if (journal_inum) { 4611617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4612ac27a0ecSDave Kleikamp return -EINVAL; 4613ac27a0ecSDave Kleikamp } else { 4614617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4615ac27a0ecSDave Kleikamp return -EINVAL; 4616ac27a0ecSDave Kleikamp } 4617ac27a0ecSDave Kleikamp 461890576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4619b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 46204776004fSTheodore Ts'o 4621e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 4622dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 46231c13d5c0STheodore Ts'o if (!err) { 46241c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 46251c13d5c0STheodore Ts'o if (save) 46261c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 46271c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4628dab291afSMingming Cao err = jbd2_journal_load(journal); 46291c13d5c0STheodore Ts'o if (save) 46301c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 46311c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 46321c13d5c0STheodore Ts'o kfree(save); 46331c13d5c0STheodore Ts'o } 4634ac27a0ecSDave Kleikamp 4635ac27a0ecSDave Kleikamp if (err) { 4636b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4637dab291afSMingming Cao jbd2_journal_destroy(journal); 4638ac27a0ecSDave Kleikamp return err; 4639ac27a0ecSDave Kleikamp } 4640ac27a0ecSDave Kleikamp 4641617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4642617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4643ac27a0ecSDave Kleikamp 4644c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4645ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4646ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4647ac27a0ecSDave Kleikamp 4648ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4649e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4650ac27a0ecSDave Kleikamp } 4651ac27a0ecSDave Kleikamp 4652ac27a0ecSDave Kleikamp return 0; 4653ac27a0ecSDave Kleikamp } 4654ac27a0ecSDave Kleikamp 4655e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4656ac27a0ecSDave Kleikamp { 4657e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4658617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4659c4be0c1dSTakashi Sato int error = 0; 4660ac27a0ecSDave Kleikamp 4661bdfe0cbdSTheodore Ts'o if (!sbh || block_device_ejected(sb)) 4662c4be0c1dSTakashi Sato return error; 466371290b36STheodore Ts'o /* 466471290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 466571290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 466671290b36STheodore Ts'o * write time when we are mounting the root file system 466771290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 466871290b36STheodore Ts'o * for people who are east of GMT and who make their clock 466971290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 467071290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 467171290b36STheodore Ts'o * to complain and force a full file system check. 467271290b36STheodore Ts'o */ 467371290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4674ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4675f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4676afc32f7eSTheodore Ts'o es->s_kbytes_written = 4677afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4678afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4679afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4680f613dfcbSTheodore Ts'o else 4681f613dfcbSTheodore Ts'o es->s_kbytes_written = 4682f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4683d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 468457042651STheodore Ts'o ext4_free_blocks_count_set(es, 468557042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 468657042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4687d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 46887f93cff9STheodore Ts'o es->s_free_inodes_count = 46897f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 46905d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4691ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 469206db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 46931566a48aSTheodore Ts'o if (sync) 46944743f839SPranay Kr. Srivastava lock_buffer(sbh); 46954743f839SPranay Kr. Srivastava if (buffer_write_io_error(sbh)) { 46964743f839SPranay Kr. Srivastava /* 46974743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 46984743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 46994743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 47004743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 47014743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 47024743f839SPranay Kr. Srivastava * write and hope for the best. 47034743f839SPranay Kr. Srivastava */ 47044743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 47054743f839SPranay Kr. Srivastava "superblock detected"); 47064743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 47074743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 47084743f839SPranay Kr. Srivastava } 4709ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4710914258bfSTheodore Ts'o if (sync) { 47111566a48aSTheodore Ts'o unlock_buffer(sbh); 4712564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 471300473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 4714c4be0c1dSTakashi Sato if (error) 4715c4be0c1dSTakashi Sato return error; 4716c4be0c1dSTakashi Sato 4717c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4718c4be0c1dSTakashi Sato if (error) { 4719b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4720b31e1552SEric Sandeen "superblock"); 4721914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4722914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4723914258bfSTheodore Ts'o } 4724914258bfSTheodore Ts'o } 4725c4be0c1dSTakashi Sato return error; 4726ac27a0ecSDave Kleikamp } 4727ac27a0ecSDave Kleikamp 4728ac27a0ecSDave Kleikamp /* 4729ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4730ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4731ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4732ac27a0ecSDave Kleikamp */ 4733617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4734617ba13bSMingming Cao struct ext4_super_block *es) 4735ac27a0ecSDave Kleikamp { 4736617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4737ac27a0ecSDave Kleikamp 4738e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 47390390131bSFrank Mayhar BUG_ON(journal != NULL); 47400390131bSFrank Mayhar return; 47410390131bSFrank Mayhar } 4742dab291afSMingming Cao jbd2_journal_lock_updates(journal); 47437ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 47447ffe1ea8SHidehiro Kawai goto out; 47457ffe1ea8SHidehiro Kawai 4746e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb) && 4747ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4748e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4749e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4750ac27a0ecSDave Kleikamp } 47517ffe1ea8SHidehiro Kawai 47527ffe1ea8SHidehiro Kawai out: 4753dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4754ac27a0ecSDave Kleikamp } 4755ac27a0ecSDave Kleikamp 4756ac27a0ecSDave Kleikamp /* 4757ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4758ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4759ac27a0ecSDave Kleikamp * main filesystem now. 4760ac27a0ecSDave Kleikamp */ 4761617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4762617ba13bSMingming Cao struct ext4_super_block *es) 4763ac27a0ecSDave Kleikamp { 4764ac27a0ecSDave Kleikamp journal_t *journal; 4765ac27a0ecSDave Kleikamp int j_errno; 4766ac27a0ecSDave Kleikamp const char *errstr; 4767ac27a0ecSDave Kleikamp 4768e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 47690390131bSFrank Mayhar 4770617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4771ac27a0ecSDave Kleikamp 4772ac27a0ecSDave Kleikamp /* 4773ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4774617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4775ac27a0ecSDave Kleikamp */ 4776ac27a0ecSDave Kleikamp 4777dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4778ac27a0ecSDave Kleikamp if (j_errno) { 4779ac27a0ecSDave Kleikamp char nbuf[16]; 4780ac27a0ecSDave Kleikamp 4781617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 478212062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4783ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 478412062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4785ac27a0ecSDave Kleikamp 4786617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4787617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4788e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4789ac27a0ecSDave Kleikamp 4790dab291afSMingming Cao jbd2_journal_clear_err(journal); 4791d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4792ac27a0ecSDave Kleikamp } 4793ac27a0ecSDave Kleikamp } 4794ac27a0ecSDave Kleikamp 4795ac27a0ecSDave Kleikamp /* 4796ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4797ac27a0ecSDave Kleikamp * and wait on the commit. 4798ac27a0ecSDave Kleikamp */ 4799617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4800ac27a0ecSDave Kleikamp { 4801ac27a0ecSDave Kleikamp journal_t *journal; 4802ac27a0ecSDave Kleikamp 4803ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4804ac27a0ecSDave Kleikamp return 0; 4805ac27a0ecSDave Kleikamp 4806617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4807b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4808ac27a0ecSDave Kleikamp } 4809ac27a0ecSDave Kleikamp 4810617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4811ac27a0ecSDave Kleikamp { 481214ce0cb4STheodore Ts'o int ret = 0; 48139eddacf9SJan Kara tid_t target; 481406a407f1SDmitry Monakhov bool needs_barrier = false; 48158d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4816ac27a0ecSDave Kleikamp 48170db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 48180db1ff22STheodore Ts'o return 0; 48190db1ff22STheodore Ts'o 48209bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 48212e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4822a1177825SJan Kara /* 4823a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4824a1177825SJan Kara * no dirty dquots 4825a1177825SJan Kara */ 4826a1177825SJan Kara dquot_writeback_dquots(sb, -1); 482706a407f1SDmitry Monakhov /* 482806a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 482906a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 483006a407f1SDmitry Monakhov * transaction_commit will do it for us. 483106a407f1SDmitry Monakhov */ 4832bda32530STheodore Ts'o if (sbi->s_journal) { 483306a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 483406a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 483506a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 483606a407f1SDmitry Monakhov needs_barrier = true; 483706a407f1SDmitry Monakhov 48388d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4839ac27a0ecSDave Kleikamp if (wait) 4840bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4841bda32530STheodore Ts'o target); 48420390131bSFrank Mayhar } 4843bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4844bda32530STheodore Ts'o needs_barrier = true; 484506a407f1SDmitry Monakhov if (needs_barrier) { 484606a407f1SDmitry Monakhov int err; 484706a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 484806a407f1SDmitry Monakhov if (!ret) 484906a407f1SDmitry Monakhov ret = err; 485006a407f1SDmitry Monakhov } 485106a407f1SDmitry Monakhov 485206a407f1SDmitry Monakhov return ret; 485306a407f1SDmitry Monakhov } 485406a407f1SDmitry Monakhov 4855ac27a0ecSDave Kleikamp /* 4856ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4857ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4858be4f27d3SYongqiang Yang * 4859be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 48608e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 48618e8ad8a5SJan Kara * modifications. 4862ac27a0ecSDave Kleikamp */ 4863c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4864ac27a0ecSDave Kleikamp { 4865c4be0c1dSTakashi Sato int error = 0; 4866c4be0c1dSTakashi Sato journal_t *journal; 4867ac27a0ecSDave Kleikamp 48689ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 48699ca92389STheodore Ts'o return 0; 48709ca92389STheodore Ts'o 4871c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4872ac27a0ecSDave Kleikamp 4873bb044576STheodore Ts'o if (journal) { 4874ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4875dab291afSMingming Cao jbd2_journal_lock_updates(journal); 48767ffe1ea8SHidehiro Kawai 48777ffe1ea8SHidehiro Kawai /* 4878bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4879bb044576STheodore Ts'o * flush the journal. 48807ffe1ea8SHidehiro Kawai */ 4881c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 48826b0310fbSEric Sandeen if (error < 0) 48836b0310fbSEric Sandeen goto out; 4884ac27a0ecSDave Kleikamp 4885ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4886e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4887c642dc9eSEric Sandeen } 4888c642dc9eSEric Sandeen 4889e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 48906b0310fbSEric Sandeen out: 4891bb044576STheodore Ts'o if (journal) 48928e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4893bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 48946b0310fbSEric Sandeen return error; 4895ac27a0ecSDave Kleikamp } 4896ac27a0ecSDave Kleikamp 4897ac27a0ecSDave Kleikamp /* 4898ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4899ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4900ac27a0ecSDave Kleikamp */ 4901c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4902ac27a0ecSDave Kleikamp { 4903783d9485STheodore Ts'o if ((sb->s_flags & MS_RDONLY) || ext4_forced_shutdown(EXT4_SB(sb))) 49049ca92389STheodore Ts'o return 0; 49059ca92389STheodore Ts'o 4906c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 49079ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4908e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 4909c642dc9eSEric Sandeen } 4910c642dc9eSEric Sandeen 4911e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4912c4be0c1dSTakashi Sato return 0; 4913ac27a0ecSDave Kleikamp } 4914ac27a0ecSDave Kleikamp 4915673c6100STheodore Ts'o /* 4916673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4917673c6100STheodore Ts'o */ 4918673c6100STheodore Ts'o struct ext4_mount_options { 4919673c6100STheodore Ts'o unsigned long s_mount_opt; 4920a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 492108cefc7aSEric W. Biederman kuid_t s_resuid; 492208cefc7aSEric W. Biederman kgid_t s_resgid; 4923673c6100STheodore Ts'o unsigned long s_commit_interval; 4924673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4925673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4926673c6100STheodore Ts'o int s_jquota_fmt; 4927a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4928673c6100STheodore Ts'o #endif 4929673c6100STheodore Ts'o }; 4930673c6100STheodore Ts'o 4931617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4932ac27a0ecSDave Kleikamp { 4933617ba13bSMingming Cao struct ext4_super_block *es; 4934617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4935ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4936617ba13bSMingming Cao struct ext4_mount_options old_opts; 4937c79d967dSChristoph Hellwig int enable_quota = 0; 49388a266467STheodore Ts'o ext4_group_t g; 4939b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4940c5e06d10SJohann Lombardi int err = 0; 4941ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 494203dafb5fSChen Gang int i, j; 4943ac27a0ecSDave Kleikamp #endif 4944d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4945ac27a0ecSDave Kleikamp 4946ac27a0ecSDave Kleikamp /* Store the original options */ 4947ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4948ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4949a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4950ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4951ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4952ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 495330773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 495430773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4955ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4956ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4957a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 495803dafb5fSChen Gang if (sbi->s_qf_names[i]) { 495903dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 496003dafb5fSChen Gang GFP_KERNEL); 496103dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 496203dafb5fSChen Gang for (j = 0; j < i; j++) 496303dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 49643e36a163SWei Yongjun kfree(orig_data); 496503dafb5fSChen Gang return -ENOMEM; 496603dafb5fSChen Gang } 496703dafb5fSChen Gang } else 496803dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4969ac27a0ecSDave Kleikamp #endif 4970b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4971b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4972ac27a0ecSDave Kleikamp 4973661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4974ac27a0ecSDave Kleikamp err = -EINVAL; 4975ac27a0ecSDave Kleikamp goto restore_opts; 4976ac27a0ecSDave Kleikamp } 4977ac27a0ecSDave Kleikamp 49786b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 49796b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 49806b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 49812d5b86e0SEric Sandeen "during remount not supported; ignoring"); 49822d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 4983c6d3d56dSDarrick J. Wong } 4984c6d3d56dSDarrick J. Wong 49856ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 49866ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 49876ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 49886ae6514bSPiotr Sarna "both data=journal and delalloc"); 49896ae6514bSPiotr Sarna err = -EINVAL; 49906ae6514bSPiotr Sarna goto restore_opts; 49916ae6514bSPiotr Sarna } 49926ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 49936ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 49946ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 49956ae6514bSPiotr Sarna err = -EINVAL; 49966ae6514bSPiotr Sarna goto restore_opts; 49976ae6514bSPiotr Sarna } 4998923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 4999923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 5000923ae0ffSRoss Zwisler "both data=journal and dax"); 5001923ae0ffSRoss Zwisler err = -EINVAL; 5002923ae0ffSRoss Zwisler goto restore_opts; 5003923ae0ffSRoss Zwisler } 5004ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 5005ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5006ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5007ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5008ab04df78SJan Kara err = -EINVAL; 5009ab04df78SJan Kara goto restore_opts; 5010ab04df78SJan Kara } 5011923ae0ffSRoss Zwisler } 5012923ae0ffSRoss Zwisler 5013cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 5014cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 5015cdb7ee4cSTahsin Erdogan err = -EINVAL; 5016cdb7ee4cSTahsin Erdogan goto restore_opts; 5017cdb7ee4cSTahsin Erdogan } 5018cdb7ee4cSTahsin Erdogan 5019923ae0ffSRoss Zwisler if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { 5020923ae0ffSRoss Zwisler ext4_msg(sb, KERN_WARNING, "warning: refusing change of " 5021923ae0ffSRoss Zwisler "dax flag with busy inodes while remounting"); 5022923ae0ffSRoss Zwisler sbi->s_mount_opt ^= EXT4_MOUNT_DAX; 50236ae6514bSPiotr Sarna } 50246ae6514bSPiotr Sarna 50254ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 5026c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 5027ac27a0ecSDave Kleikamp 5028ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 5029482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 5030ac27a0ecSDave Kleikamp 5031ac27a0ecSDave Kleikamp es = sbi->s_es; 5032ac27a0ecSDave Kleikamp 5033b3881f74STheodore Ts'o if (sbi->s_journal) { 5034617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 5035b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 5036b3881f74STheodore Ts'o } 5037ac27a0ecSDave Kleikamp 5038a2fd66d0STheodore Ts'o if (*flags & MS_LAZYTIME) 5039a2fd66d0STheodore Ts'o sb->s_flags |= MS_LAZYTIME; 5040a2fd66d0STheodore Ts'o 5041661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 50424ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 5043ac27a0ecSDave Kleikamp err = -EROFS; 5044ac27a0ecSDave Kleikamp goto restore_opts; 5045ac27a0ecSDave Kleikamp } 5046ac27a0ecSDave Kleikamp 5047ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 504838c03b34STheodore Ts'o err = sync_filesystem(sb); 504938c03b34STheodore Ts'o if (err < 0) 505038c03b34STheodore Ts'o goto restore_opts; 50510f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 50520f0dd62fSChristoph Hellwig if (err < 0) 5053c79d967dSChristoph Hellwig goto restore_opts; 5054c79d967dSChristoph Hellwig 5055ac27a0ecSDave Kleikamp /* 5056ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 5057ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 5058ac27a0ecSDave Kleikamp */ 5059ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 5060ac27a0ecSDave Kleikamp 5061ac27a0ecSDave Kleikamp /* 5062ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 5063ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 5064ac27a0ecSDave Kleikamp * mark the partition as valid again. 5065ac27a0ecSDave Kleikamp */ 5066617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 5067617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 5068ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 5069ac27a0ecSDave Kleikamp 5070a63c9eb2STheodore Ts'o if (sbi->s_journal) 5071617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 5072ac27a0ecSDave Kleikamp } else { 5073a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 5074e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 50752cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 5076ac27a0ecSDave Kleikamp err = -EROFS; 5077ac27a0ecSDave Kleikamp goto restore_opts; 5078ac27a0ecSDave Kleikamp } 5079ead6596bSEric Sandeen /* 50808a266467STheodore Ts'o * Make sure the group descriptor checksums 50810b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 50828a266467STheodore Ts'o */ 50838a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 50848a266467STheodore Ts'o struct ext4_group_desc *gdp = 50858a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 50868a266467STheodore Ts'o 5087feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 5088b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5089b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 5090e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 50918a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 50926a797d27SDarrick J. Wong err = -EFSBADCRC; 50938a266467STheodore Ts'o goto restore_opts; 50948a266467STheodore Ts'o } 50958a266467STheodore Ts'o } 50968a266467STheodore Ts'o 50978a266467STheodore Ts'o /* 5098ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 5099ead6596bSEric Sandeen * around from a previously readonly bdev mount, 5100ead6596bSEric Sandeen * require a full umount/remount for now. 5101ead6596bSEric Sandeen */ 5102ead6596bSEric Sandeen if (es->s_last_orphan) { 5103b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 5104ead6596bSEric Sandeen "remount RDWR because of unprocessed " 5105ead6596bSEric Sandeen "orphan inode list. Please " 5106b31e1552SEric Sandeen "umount/remount instead"); 5107ead6596bSEric Sandeen err = -EINVAL; 5108ead6596bSEric Sandeen goto restore_opts; 5109ead6596bSEric Sandeen } 5110ead6596bSEric Sandeen 5111ac27a0ecSDave Kleikamp /* 5112ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 5113ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 5114ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 5115ac27a0ecSDave Kleikamp * the partition.) 5116ac27a0ecSDave Kleikamp */ 51170390131bSFrank Mayhar if (sbi->s_journal) 5118617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 5119ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 5120617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 5121ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 5122e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 5123c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 5124c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 5125c5e06d10SJohann Lombardi err = -EROFS; 5126c5e06d10SJohann Lombardi goto restore_opts; 5127c5e06d10SJohann Lombardi } 5128c79d967dSChristoph Hellwig enable_quota = 1; 5129ac27a0ecSDave Kleikamp } 5130ac27a0ecSDave Kleikamp } 5131bfff6873SLukas Czerner 5132bfff6873SLukas Czerner /* 5133bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 5134bfff6873SLukas Czerner * current settings 5135bfff6873SLukas Czerner */ 5136bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 5137bfff6873SLukas Czerner ext4_unregister_li_request(sb); 5138bfff6873SLukas Czerner else { 5139bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 5140bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 5141bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 5142bfff6873SLukas Czerner } 5143bfff6873SLukas Czerner 51446fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 5145d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 5146e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 51470390131bSFrank Mayhar 5148ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5149ac27a0ecSDave Kleikamp /* Release old quota file names */ 5150a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 5151ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 51527c319d32SAditya Kali if (enable_quota) { 51537c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 51540f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 5155e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 51567c319d32SAditya Kali err = ext4_enable_quotas(sb); 515707724f98STheodore Ts'o if (err) 51587c319d32SAditya Kali goto restore_opts; 51597c319d32SAditya Kali } 51607c319d32SAditya Kali } 51617c319d32SAditya Kali #endif 5162d4c402d9SCurt Wohlgemuth 5163a26f4992STheodore Ts'o *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); 5164d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5165d4c402d9SCurt Wohlgemuth kfree(orig_data); 5166ac27a0ecSDave Kleikamp return 0; 51670b8e58a1SAndreas Dilger 5168ac27a0ecSDave Kleikamp restore_opts: 5169ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5170ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5171a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5172ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5173ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5174ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 517530773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 517630773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5177ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5178ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5179a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5180ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5181ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5182ac27a0ecSDave Kleikamp } 5183ac27a0ecSDave Kleikamp #endif 5184d4c402d9SCurt Wohlgemuth kfree(orig_data); 5185ac27a0ecSDave Kleikamp return err; 5186ac27a0ecSDave Kleikamp } 5187ac27a0ecSDave Kleikamp 5188689c958cSLi Xi #ifdef CONFIG_QUOTA 5189689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 5190689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 5191689c958cSLi Xi { 5192689c958cSLi Xi struct kqid qid; 5193689c958cSLi Xi struct dquot *dquot; 5194689c958cSLi Xi u64 limit; 5195689c958cSLi Xi u64 curblock; 5196689c958cSLi Xi 5197689c958cSLi Xi qid = make_kqid_projid(projid); 5198689c958cSLi Xi dquot = dqget(sb, qid); 5199689c958cSLi Xi if (IS_ERR(dquot)) 5200689c958cSLi Xi return PTR_ERR(dquot); 5201689c958cSLi Xi spin_lock(&dq_data_lock); 5202689c958cSLi Xi 5203689c958cSLi Xi limit = (dquot->dq_dqb.dqb_bsoftlimit ? 5204689c958cSLi Xi dquot->dq_dqb.dqb_bsoftlimit : 5205689c958cSLi Xi dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; 5206689c958cSLi Xi if (limit && buf->f_blocks > limit) { 5207689c958cSLi Xi curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits; 5208689c958cSLi Xi buf->f_blocks = limit; 5209689c958cSLi Xi buf->f_bfree = buf->f_bavail = 5210689c958cSLi Xi (buf->f_blocks > curblock) ? 5211689c958cSLi Xi (buf->f_blocks - curblock) : 0; 5212689c958cSLi Xi } 5213689c958cSLi Xi 5214689c958cSLi Xi limit = dquot->dq_dqb.dqb_isoftlimit ? 5215689c958cSLi Xi dquot->dq_dqb.dqb_isoftlimit : 5216689c958cSLi Xi dquot->dq_dqb.dqb_ihardlimit; 5217689c958cSLi Xi if (limit && buf->f_files > limit) { 5218689c958cSLi Xi buf->f_files = limit; 5219689c958cSLi Xi buf->f_ffree = 5220689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 5221689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 5222689c958cSLi Xi } 5223689c958cSLi Xi 5224689c958cSLi Xi spin_unlock(&dq_data_lock); 5225689c958cSLi Xi dqput(dquot); 5226689c958cSLi Xi return 0; 5227689c958cSLi Xi } 5228689c958cSLi Xi #endif 5229689c958cSLi Xi 5230617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5231ac27a0ecSDave Kleikamp { 5232ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5233617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5234617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 523527dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5236960cc398SPekka Enberg u64 fsid; 5237d02a9391SKazuya Mio s64 bfree; 523827dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5239ac27a0ecSDave Kleikamp 5240952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5241952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5242ac27a0ecSDave Kleikamp 5243617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5244ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5245b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 524657042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 524757042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5248d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 524957042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 525027dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 525127dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 525227dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5253ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5254ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 525552d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5256617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5257960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5258960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5259960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5260960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 52610b8e58a1SAndreas Dilger 5262689c958cSLi Xi #ifdef CONFIG_QUOTA 5263689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 5264689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 5265689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 5266689c958cSLi Xi #endif 5267ac27a0ecSDave Kleikamp return 0; 5268ac27a0ecSDave Kleikamp } 5269ac27a0ecSDave Kleikamp 52700b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 52710b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 5272ac27a0ecSDave Kleikamp * Process 1 Process 2 5273617ba13bSMingming Cao * ext4_create() quota_sync() 5274dab291afSMingming Cao * jbd2_journal_start() write_dquot() 5275871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 5276dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 5277ac27a0ecSDave Kleikamp * 5278ac27a0ecSDave Kleikamp */ 5279ac27a0ecSDave Kleikamp 5280ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5281ac27a0ecSDave Kleikamp 5282ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5283ac27a0ecSDave Kleikamp { 52844c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5285ac27a0ecSDave Kleikamp } 5286ac27a0ecSDave Kleikamp 5287617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5288ac27a0ecSDave Kleikamp { 5289ac27a0ecSDave Kleikamp int ret, err; 5290ac27a0ecSDave Kleikamp handle_t *handle; 5291ac27a0ecSDave Kleikamp struct inode *inode; 5292ac27a0ecSDave Kleikamp 5293ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 52949924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5295617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5296ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5297ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5298ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5299617ba13bSMingming Cao err = ext4_journal_stop(handle); 5300ac27a0ecSDave Kleikamp if (!ret) 5301ac27a0ecSDave Kleikamp ret = err; 5302ac27a0ecSDave Kleikamp return ret; 5303ac27a0ecSDave Kleikamp } 5304ac27a0ecSDave Kleikamp 5305617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5306ac27a0ecSDave Kleikamp { 5307ac27a0ecSDave Kleikamp int ret, err; 5308ac27a0ecSDave Kleikamp handle_t *handle; 5309ac27a0ecSDave Kleikamp 53109924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5311617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5312ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5313ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5314ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5315617ba13bSMingming Cao err = ext4_journal_stop(handle); 5316ac27a0ecSDave Kleikamp if (!ret) 5317ac27a0ecSDave Kleikamp ret = err; 5318ac27a0ecSDave Kleikamp return ret; 5319ac27a0ecSDave Kleikamp } 5320ac27a0ecSDave Kleikamp 5321617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5322ac27a0ecSDave Kleikamp { 5323ac27a0ecSDave Kleikamp int ret, err; 5324ac27a0ecSDave Kleikamp handle_t *handle; 5325ac27a0ecSDave Kleikamp 53269924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5327617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 53289c3013e9SJan Kara if (IS_ERR(handle)) { 53299c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 53309c3013e9SJan Kara dquot_release(dquot); 5331ac27a0ecSDave Kleikamp return PTR_ERR(handle); 53329c3013e9SJan Kara } 5333ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5334617ba13bSMingming Cao err = ext4_journal_stop(handle); 5335ac27a0ecSDave Kleikamp if (!ret) 5336ac27a0ecSDave Kleikamp ret = err; 5337ac27a0ecSDave Kleikamp return ret; 5338ac27a0ecSDave Kleikamp } 5339ac27a0ecSDave Kleikamp 5340617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5341ac27a0ecSDave Kleikamp { 5342262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5343262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5344262b4662SJan Kara 53452c8be6b2SJan Kara /* Are we journaling quotas? */ 5346e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) || 5347262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5348ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5349617ba13bSMingming Cao return ext4_write_dquot(dquot); 5350ac27a0ecSDave Kleikamp } else { 5351ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5352ac27a0ecSDave Kleikamp } 5353ac27a0ecSDave Kleikamp } 5354ac27a0ecSDave Kleikamp 5355617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5356ac27a0ecSDave Kleikamp { 5357ac27a0ecSDave Kleikamp int ret, err; 5358ac27a0ecSDave Kleikamp handle_t *handle; 5359ac27a0ecSDave Kleikamp 5360ac27a0ecSDave Kleikamp /* Data block + inode block */ 53612b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 5362ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5363ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5364ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5365617ba13bSMingming Cao err = ext4_journal_stop(handle); 5366ac27a0ecSDave Kleikamp if (!ret) 5367ac27a0ecSDave Kleikamp ret = err; 5368ac27a0ecSDave Kleikamp return ret; 5369ac27a0ecSDave Kleikamp } 5370ac27a0ecSDave Kleikamp 5371ac27a0ecSDave Kleikamp /* 5372ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5373ac27a0ecSDave Kleikamp * the quota file and such... 5374ac27a0ecSDave Kleikamp */ 5375617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5376ac27a0ecSDave Kleikamp { 5377287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5378617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5379ac27a0ecSDave Kleikamp } 5380ac27a0ecSDave Kleikamp 5381daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 5382daf647d2STheodore Ts'o { 5383daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 5384daf647d2STheodore Ts'o 5385daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 5386daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 5387daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 5388daf647d2STheodore Ts'o * because the name of the lock is set using the 5389daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 5390daf647d2STheodore Ts'o */ 5391daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 5392daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 5393daf647d2STheodore Ts'o } 5394daf647d2STheodore Ts'o 5395ac27a0ecSDave Kleikamp /* 5396ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5397ac27a0ecSDave Kleikamp */ 5398617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 53998c54ca9cSAl Viro const struct path *path) 5400ac27a0ecSDave Kleikamp { 5401ac27a0ecSDave Kleikamp int err; 5402ac27a0ecSDave Kleikamp 5403ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5404ac27a0ecSDave Kleikamp return -EINVAL; 54050623543bSJan Kara 5406ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5407d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5408ac27a0ecSDave Kleikamp return -EXDEV; 54090623543bSJan Kara /* Journaling quota? */ 54100623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 54112b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5412f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5413b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5414b31e1552SEric Sandeen "Quota file not on filesystem root. " 5415b31e1552SEric Sandeen "Journaled quota will not work"); 54160623543bSJan Kara } 54170623543bSJan Kara 54180623543bSJan Kara /* 54190623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 54200623543bSJan Kara * all updates to the file when we bypass pagecache... 54210623543bSJan Kara */ 54220390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 54232b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 54240623543bSJan Kara /* 54250623543bSJan Kara * We don't need to lock updates but journal_flush() could 54260623543bSJan Kara * otherwise be livelocked... 54270623543bSJan Kara */ 54280623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 54297ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 54300623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5431f00c9e44SJan Kara if (err) 54327ffe1ea8SHidehiro Kawai return err; 54337ffe1ea8SHidehiro Kawai } 5434957153fcSJan Kara 5435daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 5436daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 5437957153fcSJan Kara if (err) { 5438daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 5439daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 5440957153fcSJan Kara } else { 5441957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 5442957153fcSJan Kara handle_t *handle; 5443957153fcSJan Kara 544461a92987SJan Kara /* 544561a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 544661a92987SJan Kara * files. If this fails, we return success anyway since quotas 544761a92987SJan Kara * are already enabled and this is not a hard failure. 544861a92987SJan Kara */ 5449957153fcSJan Kara inode_lock(inode); 5450957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 5451957153fcSJan Kara if (IS_ERR(handle)) 5452957153fcSJan Kara goto unlock_inode; 5453957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 5454957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 5455957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 5456957153fcSJan Kara ext4_mark_inode_dirty(handle, inode); 5457957153fcSJan Kara ext4_journal_stop(handle); 5458957153fcSJan Kara unlock_inode: 5459957153fcSJan Kara inode_unlock(inode); 5460957153fcSJan Kara } 5461daf647d2STheodore Ts'o return err; 5462ac27a0ecSDave Kleikamp } 5463ac27a0ecSDave Kleikamp 54647c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 54657c319d32SAditya Kali unsigned int flags) 54667c319d32SAditya Kali { 54677c319d32SAditya Kali int err; 54687c319d32SAditya Kali struct inode *qf_inode; 5469a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 54707c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5471689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5472689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 54737c319d32SAditya Kali }; 54747c319d32SAditya Kali 5475e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 54767c319d32SAditya Kali 54777c319d32SAditya Kali if (!qf_inums[type]) 54787c319d32SAditya Kali return -EPERM; 54797c319d32SAditya Kali 54807c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 54817c319d32SAditya Kali if (IS_ERR(qf_inode)) { 54827c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 54837c319d32SAditya Kali return PTR_ERR(qf_inode); 54847c319d32SAditya Kali } 54857c319d32SAditya Kali 5486bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5487bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 5488daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 54897c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 54907c319d32SAditya Kali iput(qf_inode); 5491daf647d2STheodore Ts'o if (err) 5492daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 54937c319d32SAditya Kali 54947c319d32SAditya Kali return err; 54957c319d32SAditya Kali } 54967c319d32SAditya Kali 54977c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 54987c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 54997c319d32SAditya Kali { 55007c319d32SAditya Kali int type, err = 0; 5501a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 55027c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5503689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5504689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 55057c319d32SAditya Kali }; 550649da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 550749da9392SJan Kara test_opt(sb, USRQUOTA), 550849da9392SJan Kara test_opt(sb, GRPQUOTA), 550949da9392SJan Kara test_opt(sb, PRJQUOTA), 551049da9392SJan Kara }; 55117c319d32SAditya Kali 55127c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 5513a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 55147c319d32SAditya Kali if (qf_inums[type]) { 55157c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 551649da9392SJan Kara DQUOT_USAGE_ENABLED | 551749da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 55187c319d32SAditya Kali if (err) { 55197c319d32SAditya Kali ext4_warning(sb, 552072ba7450STheodore Ts'o "Failed to enable quota tracking " 552172ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 552272ba7450STheodore Ts'o "e2fsck to fix.", type, err); 55237c319d32SAditya Kali return err; 55247c319d32SAditya Kali } 55257c319d32SAditya Kali } 55267c319d32SAditya Kali } 55277c319d32SAditya Kali return 0; 55287c319d32SAditya Kali } 55297c319d32SAditya Kali 5530ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5531ca0e05e4SDmitry Monakhov { 553221f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 553321f97697SJan Kara handle_t *handle; 5534957153fcSJan Kara int err; 553521f97697SJan Kara 553687009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 553787009d86SDmitry Monakhov * Caller already holds s_umount sem */ 553887009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5539ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5540ca0e05e4SDmitry Monakhov 5541957153fcSJan Kara if (!inode || !igrab(inode)) 55420b268590SAmir Goldstein goto out; 55430b268590SAmir Goldstein 5544957153fcSJan Kara err = dquot_quota_off(sb, type); 5545964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 5546957153fcSJan Kara goto out_put; 5547957153fcSJan Kara 5548957153fcSJan Kara inode_lock(inode); 554961a92987SJan Kara /* 555061a92987SJan Kara * Update modification times of quota files when userspace can 555161a92987SJan Kara * start looking at them. If we fail, we return success anyway since 555261a92987SJan Kara * this is not a hard failure and quotas are already disabled. 555361a92987SJan Kara */ 55549924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 555521f97697SJan Kara if (IS_ERR(handle)) 5556957153fcSJan Kara goto out_unlock; 5557957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 5558957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 5559eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 556021f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 556121f97697SJan Kara ext4_journal_stop(handle); 5562957153fcSJan Kara out_unlock: 5563957153fcSJan Kara inode_unlock(inode); 5564957153fcSJan Kara out_put: 5565964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 5566957153fcSJan Kara iput(inode); 5567957153fcSJan Kara return err; 556821f97697SJan Kara out: 5569ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5570ca0e05e4SDmitry Monakhov } 5571ca0e05e4SDmitry Monakhov 5572ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5573ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5574ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5575ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5576617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5577ac27a0ecSDave Kleikamp size_t len, loff_t off) 5578ac27a0ecSDave Kleikamp { 5579ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5580725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5581ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5582ac27a0ecSDave Kleikamp int tocopy; 5583ac27a0ecSDave Kleikamp size_t toread; 5584ac27a0ecSDave Kleikamp struct buffer_head *bh; 5585ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5586ac27a0ecSDave Kleikamp 5587ac27a0ecSDave Kleikamp if (off > i_size) 5588ac27a0ecSDave Kleikamp return 0; 5589ac27a0ecSDave Kleikamp if (off+len > i_size) 5590ac27a0ecSDave Kleikamp len = i_size-off; 5591ac27a0ecSDave Kleikamp toread = len; 5592ac27a0ecSDave Kleikamp while (toread > 0) { 5593ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5594ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 55951c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 55961c215028STheodore Ts'o if (IS_ERR(bh)) 55971c215028STheodore Ts'o return PTR_ERR(bh); 5598ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5599ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5600ac27a0ecSDave Kleikamp else 5601ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5602ac27a0ecSDave Kleikamp brelse(bh); 5603ac27a0ecSDave Kleikamp offset = 0; 5604ac27a0ecSDave Kleikamp toread -= tocopy; 5605ac27a0ecSDave Kleikamp data += tocopy; 5606ac27a0ecSDave Kleikamp blk++; 5607ac27a0ecSDave Kleikamp } 5608ac27a0ecSDave Kleikamp return len; 5609ac27a0ecSDave Kleikamp } 5610ac27a0ecSDave Kleikamp 5611ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5612ac27a0ecSDave Kleikamp * enough credits) */ 5613617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5614ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5615ac27a0ecSDave Kleikamp { 5616ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5617725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 56181c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5619c5e298aeSTheodore Ts'o int retries = 0; 5620ac27a0ecSDave Kleikamp struct buffer_head *bh; 5621ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5622ac27a0ecSDave Kleikamp 56230390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5624b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5625b31e1552SEric Sandeen " cancelled because transaction is not started", 56269c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 56279c3013e9SJan Kara return -EIO; 56289c3013e9SJan Kara } 562967eeb568SDmitry Monakhov /* 563067eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 563167eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 563267eeb568SDmitry Monakhov */ 563367eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 563467eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 563567eeb568SDmitry Monakhov " cancelled because not block aligned", 563667eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 563767eeb568SDmitry Monakhov return -EIO; 563867eeb568SDmitry Monakhov } 563967eeb568SDmitry Monakhov 5640c5e298aeSTheodore Ts'o do { 5641c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 5642c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 5643c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 5644c5e298aeSTheodore Ts'o } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && 5645c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 56461c215028STheodore Ts'o if (IS_ERR(bh)) 56471c215028STheodore Ts'o return PTR_ERR(bh); 5648ac27a0ecSDave Kleikamp if (!bh) 5649ac27a0ecSDave Kleikamp goto out; 56505d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5651617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5652ac27a0ecSDave Kleikamp if (err) { 5653ac27a0ecSDave Kleikamp brelse(bh); 56541c215028STheodore Ts'o return err; 5655ac27a0ecSDave Kleikamp } 5656ac27a0ecSDave Kleikamp lock_buffer(bh); 565767eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5658ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5659ac27a0ecSDave Kleikamp unlock_buffer(bh); 56600390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5661ac27a0ecSDave Kleikamp brelse(bh); 5662ac27a0ecSDave Kleikamp out: 566367eeb568SDmitry Monakhov if (inode->i_size < off + len) { 566467eeb568SDmitry Monakhov i_size_write(inode, off + len); 5665617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5666617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 566721f97697SJan Kara } 566867eeb568SDmitry Monakhov return len; 5669ac27a0ecSDave Kleikamp } 5670ac27a0ecSDave Kleikamp 56718f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid) 56728f0e8746STheodore Ts'o { 56738f0e8746STheodore Ts'o const struct quota_format_ops *ops; 56748f0e8746STheodore Ts'o 56758f0e8746STheodore Ts'o if (!sb_has_quota_loaded(sb, qid->type)) 56768f0e8746STheodore Ts'o return -ESRCH; 56778f0e8746STheodore Ts'o ops = sb_dqopt(sb)->ops[qid->type]; 56788f0e8746STheodore Ts'o if (!ops || !ops->get_next_id) 56798f0e8746STheodore Ts'o return -ENOSYS; 56808f0e8746STheodore Ts'o return dquot_get_next_id(sb, qid); 56818f0e8746STheodore Ts'o } 5682ac27a0ecSDave Kleikamp #endif 5683ac27a0ecSDave Kleikamp 5684152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5685152a0836SAl Viro const char *dev_name, void *data) 5686ac27a0ecSDave Kleikamp { 5687152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5688ac27a0ecSDave Kleikamp } 5689ac27a0ecSDave Kleikamp 5690c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 569124b58424STheodore Ts'o static inline void register_as_ext2(void) 569224b58424STheodore Ts'o { 569324b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 569424b58424STheodore Ts'o if (err) 569524b58424STheodore Ts'o printk(KERN_WARNING 569624b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 569724b58424STheodore Ts'o } 569824b58424STheodore Ts'o 569924b58424STheodore Ts'o static inline void unregister_as_ext2(void) 570024b58424STheodore Ts'o { 570124b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 570224b58424STheodore Ts'o } 57032035e776STheodore Ts'o 57042035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 57052035e776STheodore Ts'o { 5706e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 57072035e776STheodore Ts'o return 0; 57082035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 57092035e776STheodore Ts'o return 1; 5710e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 57112035e776STheodore Ts'o return 0; 57122035e776STheodore Ts'o return 1; 57132035e776STheodore Ts'o } 571424b58424STheodore Ts'o #else 571524b58424STheodore Ts'o static inline void register_as_ext2(void) { } 571624b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 57172035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 571824b58424STheodore Ts'o #endif 571924b58424STheodore Ts'o 572024b58424STheodore Ts'o static inline void register_as_ext3(void) 572124b58424STheodore Ts'o { 572224b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 572324b58424STheodore Ts'o if (err) 572424b58424STheodore Ts'o printk(KERN_WARNING 572524b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 572624b58424STheodore Ts'o } 572724b58424STheodore Ts'o 572824b58424STheodore Ts'o static inline void unregister_as_ext3(void) 572924b58424STheodore Ts'o { 573024b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 573124b58424STheodore Ts'o } 57322035e776STheodore Ts'o 57332035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 57342035e776STheodore Ts'o { 5735e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 57362035e776STheodore Ts'o return 0; 5737e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 57382035e776STheodore Ts'o return 0; 57392035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 57402035e776STheodore Ts'o return 1; 5741e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 57422035e776STheodore Ts'o return 0; 57432035e776STheodore Ts'o return 1; 57442035e776STheodore Ts'o } 574524b58424STheodore Ts'o 574603010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5747ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 574803010a33STheodore Ts'o .name = "ext4", 5749152a0836SAl Viro .mount = ext4_mount, 5750ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5751ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5752ac27a0ecSDave Kleikamp }; 57537f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5754ac27a0ecSDave Kleikamp 5755e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5756e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5757e9e3bcecSEric Sandeen 57585dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5759ac27a0ecSDave Kleikamp { 5760e9e3bcecSEric Sandeen int i, err; 5761c9de560dSAlex Tomas 5762e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 576307c0c5d8SAl Viro ext4_li_info = NULL; 576407c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 576507c0c5d8SAl Viro 57669a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 576712e9b892SDmitry Monakhov ext4_check_flag_values(); 5768e9e3bcecSEric Sandeen 5769e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 5770e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5771e9e3bcecSEric Sandeen 577251865fdaSZheng Liu err = ext4_init_es(); 57736fd058f7STheodore Ts'o if (err) 57746fd058f7STheodore Ts'o return err; 577551865fdaSZheng Liu 577651865fdaSZheng Liu err = ext4_init_pageio(); 577751865fdaSZheng Liu if (err) 5778b5799018STheodore Ts'o goto out5; 577951865fdaSZheng Liu 57805dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5781bd2d0210STheodore Ts'o if (err) 5782b5799018STheodore Ts'o goto out4; 5783857ac889SLukas Czerner 5784b5799018STheodore Ts'o err = ext4_init_sysfs(); 5785dd68314cSTheodore Ts'o if (err) 5786b5799018STheodore Ts'o goto out3; 5787857ac889SLukas Czerner 57885dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5789ac27a0ecSDave Kleikamp if (err) 5790c9de560dSAlex Tomas goto out2; 5791ac27a0ecSDave Kleikamp err = init_inodecache(); 5792ac27a0ecSDave Kleikamp if (err) 5793ac27a0ecSDave Kleikamp goto out1; 579424b58424STheodore Ts'o register_as_ext3(); 57952035e776STheodore Ts'o register_as_ext2(); 579603010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5797ac27a0ecSDave Kleikamp if (err) 5798ac27a0ecSDave Kleikamp goto out; 5799bfff6873SLukas Czerner 5800ac27a0ecSDave Kleikamp return 0; 5801ac27a0ecSDave Kleikamp out: 580224b58424STheodore Ts'o unregister_as_ext2(); 580324b58424STheodore Ts'o unregister_as_ext3(); 5804ac27a0ecSDave Kleikamp destroy_inodecache(); 5805ac27a0ecSDave Kleikamp out1: 58065dabfc78STheodore Ts'o ext4_exit_mballoc(); 58079c191f70ST Makphaibulchoke out2: 5808b5799018STheodore Ts'o ext4_exit_sysfs(); 5809b5799018STheodore Ts'o out3: 5810dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5811b5799018STheodore Ts'o out4: 58125dabfc78STheodore Ts'o ext4_exit_pageio(); 5813b5799018STheodore Ts'o out5: 581451865fdaSZheng Liu ext4_exit_es(); 581551865fdaSZheng Liu 5816ac27a0ecSDave Kleikamp return err; 5817ac27a0ecSDave Kleikamp } 5818ac27a0ecSDave Kleikamp 58195dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5820ac27a0ecSDave Kleikamp { 5821bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 582224b58424STheodore Ts'o unregister_as_ext2(); 582324b58424STheodore Ts'o unregister_as_ext3(); 582403010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5825ac27a0ecSDave Kleikamp destroy_inodecache(); 58265dabfc78STheodore Ts'o ext4_exit_mballoc(); 5827b5799018STheodore Ts'o ext4_exit_sysfs(); 58285dabfc78STheodore Ts'o ext4_exit_system_zone(); 58295dabfc78STheodore Ts'o ext4_exit_pageio(); 5830dd12ed14SEric Sandeen ext4_exit_es(); 5831ac27a0ecSDave Kleikamp } 5832ac27a0ecSDave Kleikamp 5833ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 583483982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5835ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 58365dabfc78STheodore Ts'o module_init(ext4_init_fs) 58375dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5838