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> 24dab291afSMingming Cao #include <linux/jbd2.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 28ac27a0ecSDave Kleikamp #include <linux/parser.h> 29ac27a0ecSDave Kleikamp #include <linux/smp_lock.h> 30ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 31a5694255SChristoph Hellwig #include <linux/exportfs.h> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 389f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 393197ebdbSTheodore Ts'o #include <linux/ctype.h> 401330593eSVignesh Babu #include <linux/log2.h> 41717d50e4SAndreas Dilger #include <linux/crc16.h> 42ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 43ac27a0ecSDave Kleikamp 443dcf5451SChristoph Hellwig #include "ext4.h" 453dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 46ac27a0ecSDave Kleikamp #include "xattr.h" 47ac27a0ecSDave Kleikamp #include "acl.h" 483661d286STheodore Ts'o #include "mballoc.h" 49ac27a0ecSDave Kleikamp 509bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 519bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 529bffad1eSTheodore Ts'o 539f6200bbSTheodore Ts'o struct proc_dir_entry *ext4_proc_root; 543197ebdbSTheodore Ts'o static struct kset *ext4_kset; 559f6200bbSTheodore Ts'o 56617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 57ac27a0ecSDave Kleikamp unsigned long journal_devnum); 58e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 59617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 60617ba13bSMingming Cao struct ext4_super_block *es); 61617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 62617ba13bSMingming Cao struct ext4_super_block *es); 63617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 64617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 65ac27a0ecSDave Kleikamp char nbuf[16]); 66617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 67617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 68c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 69617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 70c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 71ba69f9abSJan Kara static int ext4_get_sb(struct file_system_type *fs_type, int flags, 72ba69f9abSJan Kara const char *dev_name, void *data, struct vfsmount *mnt); 73ac27a0ecSDave Kleikamp 74ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 75ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 76ba69f9abSJan Kara .owner = THIS_MODULE, 77ba69f9abSJan Kara .name = "ext3", 78ba69f9abSJan Kara .get_sb = ext4_get_sb, 79ba69f9abSJan Kara .kill_sb = kill_block_super, 80ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 81ba69f9abSJan Kara }; 82ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 83ba69f9abSJan Kara #else 84ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 85ba69f9abSJan Kara #endif 86bd81d8eeSLaurent Vivier 878fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 888fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 89bd81d8eeSLaurent Vivier { 903a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 918fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 928fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 93bd81d8eeSLaurent Vivier } 94bd81d8eeSLaurent Vivier 958fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 968fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 97bd81d8eeSLaurent Vivier { 985272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 998fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1008fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 101bd81d8eeSLaurent Vivier } 102bd81d8eeSLaurent Vivier 1038fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 1048fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 105bd81d8eeSLaurent Vivier { 1065272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 1078fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1088fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 109bd81d8eeSLaurent Vivier } 110bd81d8eeSLaurent Vivier 111560671a0SAneesh Kumar K.V __u32 ext4_free_blks_count(struct super_block *sb, 112560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 113560671a0SAneesh Kumar K.V { 114560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 115560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 116560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 117560671a0SAneesh Kumar K.V } 118560671a0SAneesh Kumar K.V 119560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 120560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 121560671a0SAneesh Kumar K.V { 122560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 123560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 124560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 125560671a0SAneesh Kumar K.V } 126560671a0SAneesh Kumar K.V 127560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 128560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 129560671a0SAneesh Kumar K.V { 130560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 131560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 132560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 133560671a0SAneesh Kumar K.V } 134560671a0SAneesh Kumar K.V 135560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 136560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 137560671a0SAneesh Kumar K.V { 138560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 139560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 140560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 141560671a0SAneesh Kumar K.V } 142560671a0SAneesh Kumar K.V 1438fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 1448fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 145bd81d8eeSLaurent Vivier { 1463a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 1478fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1488fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 149bd81d8eeSLaurent Vivier } 150bd81d8eeSLaurent Vivier 1518fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1528fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 153bd81d8eeSLaurent Vivier { 1545272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1558fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1568fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 157bd81d8eeSLaurent Vivier } 158bd81d8eeSLaurent Vivier 1598fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1608fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 161bd81d8eeSLaurent Vivier { 1625272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1638fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1648fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 165bd81d8eeSLaurent Vivier } 166bd81d8eeSLaurent Vivier 167560671a0SAneesh Kumar K.V void ext4_free_blks_set(struct super_block *sb, 168560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 169560671a0SAneesh Kumar K.V { 170560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 171560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 172560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 173560671a0SAneesh Kumar K.V } 174560671a0SAneesh Kumar K.V 175560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 176560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 177560671a0SAneesh Kumar K.V { 178560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 179560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 180560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 181560671a0SAneesh Kumar K.V } 182560671a0SAneesh Kumar K.V 183560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 184560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 185560671a0SAneesh Kumar K.V { 186560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 187560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 188560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 189560671a0SAneesh Kumar K.V } 190560671a0SAneesh Kumar K.V 191560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 192560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 193560671a0SAneesh Kumar K.V { 194560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 195560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 196560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 197560671a0SAneesh Kumar K.V } 198560671a0SAneesh Kumar K.V 199d3d1faf6SCurt Wohlgemuth 200d3d1faf6SCurt Wohlgemuth /* Just increment the non-pointer handle value */ 201d3d1faf6SCurt Wohlgemuth static handle_t *ext4_get_nojournal(void) 202d3d1faf6SCurt Wohlgemuth { 203d3d1faf6SCurt Wohlgemuth handle_t *handle = current->journal_info; 204d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 205d3d1faf6SCurt Wohlgemuth 206d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); 207d3d1faf6SCurt Wohlgemuth 208d3d1faf6SCurt Wohlgemuth ref_cnt++; 209d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 210d3d1faf6SCurt Wohlgemuth 211d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 212d3d1faf6SCurt Wohlgemuth return handle; 213d3d1faf6SCurt Wohlgemuth } 214d3d1faf6SCurt Wohlgemuth 215d3d1faf6SCurt Wohlgemuth 216d3d1faf6SCurt Wohlgemuth /* Decrement the non-pointer handle value */ 217d3d1faf6SCurt Wohlgemuth static void ext4_put_nojournal(handle_t *handle) 218d3d1faf6SCurt Wohlgemuth { 219d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 220d3d1faf6SCurt Wohlgemuth 221d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt == 0); 222d3d1faf6SCurt Wohlgemuth 223d3d1faf6SCurt Wohlgemuth ref_cnt--; 224d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 225d3d1faf6SCurt Wohlgemuth 226d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 227d3d1faf6SCurt Wohlgemuth } 228d3d1faf6SCurt Wohlgemuth 229ac27a0ecSDave Kleikamp /* 230dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 231ac27a0ecSDave Kleikamp * 232ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 233ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 234ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 235ac27a0ecSDave Kleikamp * appropriate. 236ac27a0ecSDave Kleikamp */ 237617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 238ac27a0ecSDave Kleikamp { 239ac27a0ecSDave Kleikamp journal_t *journal; 240ac27a0ecSDave Kleikamp 241ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 242ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 243ac27a0ecSDave Kleikamp 2446b0310fbSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_WRITE); 245ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 246ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 247ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 248617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2490390131bSFrank Mayhar if (journal) { 250ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 251c67d859eSTheodore Ts'o ext4_abort(sb, "Detected aborted journal"); 252ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 253ac27a0ecSDave Kleikamp } 254dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 255ac27a0ecSDave Kleikamp } 256d3d1faf6SCurt Wohlgemuth return ext4_get_nojournal(); 2570390131bSFrank Mayhar } 258ac27a0ecSDave Kleikamp 259ac27a0ecSDave Kleikamp /* 260ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 261dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 262ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 263ac27a0ecSDave Kleikamp * appropriate. 264ac27a0ecSDave Kleikamp */ 265*c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) 266ac27a0ecSDave Kleikamp { 267ac27a0ecSDave Kleikamp struct super_block *sb; 268ac27a0ecSDave Kleikamp int err; 269ac27a0ecSDave Kleikamp int rc; 270ac27a0ecSDave Kleikamp 2710390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 272d3d1faf6SCurt Wohlgemuth ext4_put_nojournal(handle); 2730390131bSFrank Mayhar return 0; 2740390131bSFrank Mayhar } 275ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 276ac27a0ecSDave Kleikamp err = handle->h_err; 277dab291afSMingming Cao rc = jbd2_journal_stop(handle); 278ac27a0ecSDave Kleikamp 279ac27a0ecSDave Kleikamp if (!err) 280ac27a0ecSDave Kleikamp err = rc; 281ac27a0ecSDave Kleikamp if (err) 282*c398eda0STheodore Ts'o __ext4_std_error(sb, where, line, err); 283ac27a0ecSDave Kleikamp return err; 284ac27a0ecSDave Kleikamp } 285ac27a0ecSDave Kleikamp 28690c7201bSTheodore Ts'o void ext4_journal_abort_handle(const char *caller, unsigned int line, 28790c7201bSTheodore Ts'o const char *err_fn, struct buffer_head *bh, 28890c7201bSTheodore Ts'o handle_t *handle, int err) 289ac27a0ecSDave Kleikamp { 290ac27a0ecSDave Kleikamp char nbuf[16]; 291617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 292ac27a0ecSDave Kleikamp 2930390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 2940390131bSFrank Mayhar 295ac27a0ecSDave Kleikamp if (bh) 296ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 297ac27a0ecSDave Kleikamp 298ac27a0ecSDave Kleikamp if (!handle->h_err) 299ac27a0ecSDave Kleikamp handle->h_err = err; 300ac27a0ecSDave Kleikamp 301ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 302ac27a0ecSDave Kleikamp return; 303ac27a0ecSDave Kleikamp 30490c7201bSTheodore Ts'o printk(KERN_ERR "%s:%d: aborting transaction: %s in %s\n", 30590c7201bSTheodore Ts'o caller, line, errstr, err_fn); 306ac27a0ecSDave Kleikamp 307dab291afSMingming Cao jbd2_journal_abort_handle(handle); 308ac27a0ecSDave Kleikamp } 309ac27a0ecSDave Kleikamp 310ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 311ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 312ac27a0ecSDave Kleikamp * 313ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 314617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 315ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 316ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 317ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 318ac27a0ecSDave Kleikamp * write out the superblock safely. 319ac27a0ecSDave Kleikamp * 320dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 321d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 322ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 323ac27a0ecSDave Kleikamp */ 324ac27a0ecSDave Kleikamp 325617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 326ac27a0ecSDave Kleikamp { 327617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 328ac27a0ecSDave Kleikamp 329617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 330617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 331ac27a0ecSDave Kleikamp 332ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 333ac27a0ecSDave Kleikamp return; 334ac27a0ecSDave Kleikamp 335ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 336617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 337ac27a0ecSDave Kleikamp 3384ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 339ac27a0ecSDave Kleikamp if (journal) 340dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 341ac27a0ecSDave Kleikamp } 342ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 343b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 344ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 345ac27a0ecSDave Kleikamp } 346e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 347ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 348617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 349ac27a0ecSDave Kleikamp sb->s_id); 350ac27a0ecSDave Kleikamp } 351ac27a0ecSDave Kleikamp 35212062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 353*c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 354ac27a0ecSDave Kleikamp { 355ac27a0ecSDave Kleikamp va_list args; 356ac27a0ecSDave Kleikamp 357ac27a0ecSDave Kleikamp va_start(args, fmt); 358*c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: ", 359*c398eda0STheodore Ts'o sb->s_id, function, line, current->comm); 360ac27a0ecSDave Kleikamp vprintk(fmt, args); 361ac27a0ecSDave Kleikamp printk("\n"); 362ac27a0ecSDave Kleikamp va_end(args); 363ac27a0ecSDave Kleikamp 364617ba13bSMingming Cao ext4_handle_error(sb); 365ac27a0ecSDave Kleikamp } 366ac27a0ecSDave Kleikamp 367*c398eda0STheodore Ts'o void ext4_error_inode(struct inode *inode, const char *function, 368*c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 369273df556SFrank Mayhar const char *fmt, ...) 370273df556SFrank Mayhar { 371273df556SFrank Mayhar va_list args; 372273df556SFrank Mayhar 373273df556SFrank Mayhar va_start(args, fmt); 374*c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 375*c398eda0STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 376*c398eda0STheodore Ts'o if (block) 377*c398eda0STheodore Ts'o printk("block %llu: ", block); 378*c398eda0STheodore Ts'o printk("comm %s: ", current->comm); 379273df556SFrank Mayhar vprintk(fmt, args); 380273df556SFrank Mayhar printk("\n"); 381273df556SFrank Mayhar va_end(args); 382273df556SFrank Mayhar 383273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 384273df556SFrank Mayhar } 385273df556SFrank Mayhar 386*c398eda0STheodore Ts'o void ext4_error_file(struct file *file, const char *function, 387*c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 388273df556SFrank Mayhar { 389273df556SFrank Mayhar va_list args; 390273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 391273df556SFrank Mayhar char pathname[80], *path; 392273df556SFrank Mayhar 393273df556SFrank Mayhar va_start(args, fmt); 394273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 395273df556SFrank Mayhar if (!path) 396273df556SFrank Mayhar path = "(unknown)"; 397273df556SFrank Mayhar printk(KERN_CRIT 398*c398eda0STheodore Ts'o "EXT4-fs error (device %s): %s:%d: inode #%lu " 399*c398eda0STheodore Ts'o "(comm %s path %s): ", 400*c398eda0STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino, 401*c398eda0STheodore Ts'o current->comm, path); 402273df556SFrank Mayhar vprintk(fmt, args); 403273df556SFrank Mayhar printk("\n"); 404273df556SFrank Mayhar va_end(args); 405273df556SFrank Mayhar 406273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 407273df556SFrank Mayhar } 408273df556SFrank Mayhar 409617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 410ac27a0ecSDave Kleikamp char nbuf[16]) 411ac27a0ecSDave Kleikamp { 412ac27a0ecSDave Kleikamp char *errstr = NULL; 413ac27a0ecSDave Kleikamp 414ac27a0ecSDave Kleikamp switch (errno) { 415ac27a0ecSDave Kleikamp case -EIO: 416ac27a0ecSDave Kleikamp errstr = "IO failure"; 417ac27a0ecSDave Kleikamp break; 418ac27a0ecSDave Kleikamp case -ENOMEM: 419ac27a0ecSDave Kleikamp errstr = "Out of memory"; 420ac27a0ecSDave Kleikamp break; 421ac27a0ecSDave Kleikamp case -EROFS: 42278f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 42378f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 424ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 425ac27a0ecSDave Kleikamp else 426ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 427ac27a0ecSDave Kleikamp break; 428ac27a0ecSDave Kleikamp default: 429ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 430ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 431ac27a0ecSDave Kleikamp * NULL. */ 432ac27a0ecSDave Kleikamp if (nbuf) { 433ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 434ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 435ac27a0ecSDave Kleikamp errstr = nbuf; 436ac27a0ecSDave Kleikamp } 437ac27a0ecSDave Kleikamp break; 438ac27a0ecSDave Kleikamp } 439ac27a0ecSDave Kleikamp 440ac27a0ecSDave Kleikamp return errstr; 441ac27a0ecSDave Kleikamp } 442ac27a0ecSDave Kleikamp 443617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 444ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 445ac27a0ecSDave Kleikamp 446*c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 447*c398eda0STheodore Ts'o unsigned int line, int errno) 448ac27a0ecSDave Kleikamp { 449ac27a0ecSDave Kleikamp char nbuf[16]; 450ac27a0ecSDave Kleikamp const char *errstr; 451ac27a0ecSDave Kleikamp 452ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 453ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 454ac27a0ecSDave Kleikamp * an error. */ 455ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 456ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 457ac27a0ecSDave Kleikamp return; 458ac27a0ecSDave Kleikamp 459617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 460*c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 461*c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 462ac27a0ecSDave Kleikamp 463617ba13bSMingming Cao ext4_handle_error(sb); 464ac27a0ecSDave Kleikamp } 465ac27a0ecSDave Kleikamp 466ac27a0ecSDave Kleikamp /* 467617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 468ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 469ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 470ac27a0ecSDave Kleikamp * 471ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 472ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 473ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 474ac27a0ecSDave Kleikamp */ 475ac27a0ecSDave Kleikamp 476c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 477*c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 478ac27a0ecSDave Kleikamp { 479ac27a0ecSDave Kleikamp va_list args; 480ac27a0ecSDave Kleikamp 481ac27a0ecSDave Kleikamp va_start(args, fmt); 482*c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 483*c398eda0STheodore Ts'o function, line); 484ac27a0ecSDave Kleikamp vprintk(fmt, args); 485ac27a0ecSDave Kleikamp printk("\n"); 486ac27a0ecSDave Kleikamp va_end(args); 487ac27a0ecSDave Kleikamp 488ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 489617ba13bSMingming Cao panic("EXT4-fs panic from previous error\n"); 490ac27a0ecSDave Kleikamp 491ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 492ac27a0ecSDave Kleikamp return; 493ac27a0ecSDave Kleikamp 494b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 495617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 496ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4974ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 498ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 499dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 500ac27a0ecSDave Kleikamp } 501ac27a0ecSDave Kleikamp 502b31e1552SEric Sandeen void ext4_msg (struct super_block * sb, const char *prefix, 503b31e1552SEric Sandeen const char *fmt, ...) 504b31e1552SEric Sandeen { 505b31e1552SEric Sandeen va_list args; 506b31e1552SEric Sandeen 507b31e1552SEric Sandeen va_start(args, fmt); 508b31e1552SEric Sandeen printk("%sEXT4-fs (%s): ", prefix, sb->s_id); 509b31e1552SEric Sandeen vprintk(fmt, args); 510b31e1552SEric Sandeen printk("\n"); 511b31e1552SEric Sandeen va_end(args); 512b31e1552SEric Sandeen } 513b31e1552SEric Sandeen 51412062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 515*c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 516ac27a0ecSDave Kleikamp { 517ac27a0ecSDave Kleikamp va_list args; 518ac27a0ecSDave Kleikamp 519ac27a0ecSDave Kleikamp va_start(args, fmt); 520*c398eda0STheodore Ts'o printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: ", 521*c398eda0STheodore Ts'o sb->s_id, function, line); 522ac27a0ecSDave Kleikamp vprintk(fmt, args); 523ac27a0ecSDave Kleikamp printk("\n"); 524ac27a0ecSDave Kleikamp va_end(args); 525ac27a0ecSDave Kleikamp } 526ac27a0ecSDave Kleikamp 527e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 528e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 529e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 530e29136f8STheodore Ts'o const char *fmt, ...) 5315d1b1b3fSAneesh Kumar K.V __releases(bitlock) 5325d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 5335d1b1b3fSAneesh Kumar K.V { 5345d1b1b3fSAneesh Kumar K.V va_list args; 5355d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 5365d1b1b3fSAneesh Kumar K.V 5375d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 538e29136f8STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u", 539e29136f8STheodore Ts'o sb->s_id, function, line, grp); 540e29136f8STheodore Ts'o if (ino) 541e29136f8STheodore Ts'o printk("inode %lu: ", ino); 542e29136f8STheodore Ts'o if (block) 543e29136f8STheodore Ts'o printk("block %llu:", (unsigned long long) block); 5445d1b1b3fSAneesh Kumar K.V vprintk(fmt, args); 5455d1b1b3fSAneesh Kumar K.V printk("\n"); 5465d1b1b3fSAneesh Kumar K.V va_end(args); 5475d1b1b3fSAneesh Kumar K.V 5485d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 5495d1b1b3fSAneesh Kumar K.V EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 5505d1b1b3fSAneesh Kumar K.V es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 551e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 5525d1b1b3fSAneesh Kumar K.V return; 5535d1b1b3fSAneesh Kumar K.V } 5545d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 5555d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 5565d1b1b3fSAneesh Kumar K.V /* 5575d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 5585d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 5595d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 5605d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 5615d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 5625d1b1b3fSAneesh Kumar K.V * ext4_grp_locked_error() to distinguish beween the 5635d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 5645d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 5655d1b1b3fSAneesh Kumar K.V * more appropriate error code. 5665d1b1b3fSAneesh Kumar K.V */ 5675d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 5685d1b1b3fSAneesh Kumar K.V return; 5695d1b1b3fSAneesh Kumar K.V } 5705d1b1b3fSAneesh Kumar K.V 571617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 572ac27a0ecSDave Kleikamp { 573617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 574ac27a0ecSDave Kleikamp 575617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 576ac27a0ecSDave Kleikamp return; 577ac27a0ecSDave Kleikamp 57812062dddSEric Sandeen ext4_warning(sb, 579ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 580ac27a0ecSDave Kleikamp "running e2fsck is recommended", 581617ba13bSMingming Cao EXT4_DYNAMIC_REV); 582ac27a0ecSDave Kleikamp 583617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 584617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 585617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 586ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 587ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 588ac27a0ecSDave Kleikamp 589ac27a0ecSDave Kleikamp /* 590ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 591ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 592ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 593ac27a0ecSDave Kleikamp */ 594ac27a0ecSDave Kleikamp } 595ac27a0ecSDave Kleikamp 596ac27a0ecSDave Kleikamp /* 597ac27a0ecSDave Kleikamp * Open the external journal device 598ac27a0ecSDave Kleikamp */ 599b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 600ac27a0ecSDave Kleikamp { 601ac27a0ecSDave Kleikamp struct block_device *bdev; 602ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 603ac27a0ecSDave Kleikamp 604ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 605ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 606ac27a0ecSDave Kleikamp goto fail; 607ac27a0ecSDave Kleikamp return bdev; 608ac27a0ecSDave Kleikamp 609ac27a0ecSDave Kleikamp fail: 610b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 611ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 612ac27a0ecSDave Kleikamp return NULL; 613ac27a0ecSDave Kleikamp } 614ac27a0ecSDave Kleikamp 615ac27a0ecSDave Kleikamp /* 616ac27a0ecSDave Kleikamp * Release the journal device 617ac27a0ecSDave Kleikamp */ 618617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 619ac27a0ecSDave Kleikamp { 620ac27a0ecSDave Kleikamp bd_release(bdev); 6219a1c3542SAl Viro return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 622ac27a0ecSDave Kleikamp } 623ac27a0ecSDave Kleikamp 624617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 625ac27a0ecSDave Kleikamp { 626ac27a0ecSDave Kleikamp struct block_device *bdev; 627ac27a0ecSDave Kleikamp int ret = -ENODEV; 628ac27a0ecSDave Kleikamp 629ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 630ac27a0ecSDave Kleikamp if (bdev) { 631617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 632ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 633ac27a0ecSDave Kleikamp } 634ac27a0ecSDave Kleikamp return ret; 635ac27a0ecSDave Kleikamp } 636ac27a0ecSDave Kleikamp 637ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 638ac27a0ecSDave Kleikamp { 639617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 640ac27a0ecSDave Kleikamp } 641ac27a0ecSDave Kleikamp 642617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 643ac27a0ecSDave Kleikamp { 644ac27a0ecSDave Kleikamp struct list_head *l; 645ac27a0ecSDave Kleikamp 646b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 647ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 648ac27a0ecSDave Kleikamp 649ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 650ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 651ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 652ac27a0ecSDave Kleikamp printk(KERN_ERR " " 653ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 654ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 655ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 656ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 657ac27a0ecSDave Kleikamp } 658ac27a0ecSDave Kleikamp } 659ac27a0ecSDave Kleikamp 660617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 661ac27a0ecSDave Kleikamp { 662617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 663617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 664ef2cabf7SHidehiro Kawai int i, err; 665ac27a0ecSDave Kleikamp 666e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 667e0ccfd95SChristoph Hellwig 6684c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 6694c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 6704c0425ffSMingming Cao 671a9e220f8SAl Viro lock_super(sb); 6726cfd0148SChristoph Hellwig lock_kernel(); 6738c85e125SChristoph Hellwig if (sb->s_dirt) 674ebc1ac16SChristoph Hellwig ext4_commit_super(sb, 1); 6758c85e125SChristoph Hellwig 6760390131bSFrank Mayhar if (sbi->s_journal) { 677ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 67847b4a50bSJan Kara sbi->s_journal = NULL; 679ef2cabf7SHidehiro Kawai if (err < 0) 680c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 6810390131bSFrank Mayhar } 682d4edac31SJosef Bacik 683d4edac31SJosef Bacik ext4_release_system_zone(sb); 684d4edac31SJosef Bacik ext4_mb_release(sb); 685d4edac31SJosef Bacik ext4_ext_release(sb); 686d4edac31SJosef Bacik ext4_xattr_put_super(sb); 687d4edac31SJosef Bacik 688ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 689617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 690ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 691e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 692ac27a0ecSDave Kleikamp } 693240799cdSTheodore Ts'o if (sbi->s_proc) { 6949f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 695240799cdSTheodore Ts'o } 6963197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 697ac27a0ecSDave Kleikamp 698ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 699ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 700ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 701c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 702c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 703c5ca7c76STheodore Ts'o else 704772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 705ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 706ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 707ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 7086bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 709ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 710ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 711ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 712ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 713ac27a0ecSDave Kleikamp #endif 714ac27a0ecSDave Kleikamp 715ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 716ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 717ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 718ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 719ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 720ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 721ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 722ac27a0ecSDave Kleikamp 723f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 724ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 725ac27a0ecSDave Kleikamp /* 726ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 727ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 728ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 729ac27a0ecSDave Kleikamp */ 730ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 731f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 732617ba13bSMingming Cao ext4_blkdev_remove(sbi); 733ac27a0ecSDave Kleikamp } 734ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 7353197ebdbSTheodore Ts'o /* 7363197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 7373197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 7383197ebdbSTheodore Ts'o */ 7393197ebdbSTheodore Ts'o unlock_kernel(); 7403197ebdbSTheodore Ts'o unlock_super(sb); 7413197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 7423197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 743705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 744ac27a0ecSDave Kleikamp kfree(sbi); 745ac27a0ecSDave Kleikamp } 746ac27a0ecSDave Kleikamp 747e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 748ac27a0ecSDave Kleikamp 749ac27a0ecSDave Kleikamp /* 750ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 751ac27a0ecSDave Kleikamp */ 752617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 753ac27a0ecSDave Kleikamp { 754617ba13bSMingming Cao struct ext4_inode_info *ei; 755ac27a0ecSDave Kleikamp 756e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 757ac27a0ecSDave Kleikamp if (!ei) 758ac27a0ecSDave Kleikamp return NULL; 7590b8e58a1SAndreas Dilger 760ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 76191246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 762a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 763c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 764c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 7650390131bSFrank Mayhar /* 7660390131bSFrank Mayhar * Note: We can be called before EXT4_SB(sb)->s_journal is set, 7670390131bSFrank Mayhar * therefore it can be null here. Don't check it, just initialize 7680390131bSFrank Mayhar * jinode. 7690390131bSFrank Mayhar */ 770678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 771d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 772d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 773d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 7749d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 775d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 776d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 777a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 778a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 779a9e7f447SDmitry Monakhov #endif 780c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 781744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 7828d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 783b436b9beSJan Kara ei->i_sync_tid = 0; 784b436b9beSJan Kara ei->i_datasync_tid = 0; 7850b8e58a1SAndreas Dilger 786ac27a0ecSDave Kleikamp return &ei->vfs_inode; 787ac27a0ecSDave Kleikamp } 788ac27a0ecSDave Kleikamp 789617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 790ac27a0ecSDave Kleikamp { 7919f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 792b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 793b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 794b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 7959f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 7969f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 7979f7dd93dSVasily Averin true); 7989f7dd93dSVasily Averin dump_stack(); 7999f7dd93dSVasily Averin } 800617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 801ac27a0ecSDave Kleikamp } 802ac27a0ecSDave Kleikamp 80351cc5068SAlexey Dobriyan static void init_once(void *foo) 804ac27a0ecSDave Kleikamp { 805617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 806ac27a0ecSDave Kleikamp 807ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 80803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 809ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 810ac27a0ecSDave Kleikamp #endif 8110e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 812ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 813ac27a0ecSDave Kleikamp } 814ac27a0ecSDave Kleikamp 815ac27a0ecSDave Kleikamp static int init_inodecache(void) 816ac27a0ecSDave Kleikamp { 817617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 818617ba13bSMingming Cao sizeof(struct ext4_inode_info), 819ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 820ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 82120c2df83SPaul Mundt init_once); 822617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 823ac27a0ecSDave Kleikamp return -ENOMEM; 824ac27a0ecSDave Kleikamp return 0; 825ac27a0ecSDave Kleikamp } 826ac27a0ecSDave Kleikamp 827ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 828ac27a0ecSDave Kleikamp { 829617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 830ac27a0ecSDave Kleikamp } 831ac27a0ecSDave Kleikamp 832617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 833ac27a0ecSDave Kleikamp { 8349f754758SChristoph Hellwig dquot_drop(inode); 835c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 8360390131bSFrank Mayhar if (EXT4_JOURNAL(inode)) 837678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 838678aaf48SJan Kara &EXT4_I(inode)->jinode); 839ac27a0ecSDave Kleikamp } 840ac27a0ecSDave Kleikamp 8412b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 8422b2d6d01STheodore Ts'o struct super_block *sb) 843ac27a0ecSDave Kleikamp { 844ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 845617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 846ac27a0ecSDave Kleikamp 8475a20bdfcSJan Kara if (sbi->s_jquota_fmt) { 8485a20bdfcSJan Kara char *fmtname = ""; 8495a20bdfcSJan Kara 8505a20bdfcSJan Kara switch (sbi->s_jquota_fmt) { 8515a20bdfcSJan Kara case QFMT_VFS_OLD: 8525a20bdfcSJan Kara fmtname = "vfsold"; 8535a20bdfcSJan Kara break; 8545a20bdfcSJan Kara case QFMT_VFS_V0: 8555a20bdfcSJan Kara fmtname = "vfsv0"; 8565a20bdfcSJan Kara break; 8575a20bdfcSJan Kara case QFMT_VFS_V1: 8585a20bdfcSJan Kara fmtname = "vfsv1"; 8595a20bdfcSJan Kara break; 8605a20bdfcSJan Kara } 8615a20bdfcSJan Kara seq_printf(seq, ",jqfmt=%s", fmtname); 8625a20bdfcSJan Kara } 863ac27a0ecSDave Kleikamp 864ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 865ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 866ac27a0ecSDave Kleikamp 867ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 868ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 869ac27a0ecSDave Kleikamp 870482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA)) 871ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 872ac27a0ecSDave Kleikamp 873482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA)) 874ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 875ac27a0ecSDave Kleikamp #endif 876ac27a0ecSDave Kleikamp } 877ac27a0ecSDave Kleikamp 878d9c9bef1SMiklos Szeredi /* 879d9c9bef1SMiklos Szeredi * Show an option if 880d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 881d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 882d9c9bef1SMiklos Szeredi */ 883617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 884ac27a0ecSDave Kleikamp { 885aa22df2cSAneesh Kumar K.V int def_errors; 886aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 887ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 888d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 889d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 890d9c9bef1SMiklos Szeredi 891d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 892aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 893d9c9bef1SMiklos Szeredi 894d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 895d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 896d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 897d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 898aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 899d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 900d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 901d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 902d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 903d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 904d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 905d9c9bef1SMiklos Szeredi } 906d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 907d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 908d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 909d9c9bef1SMiklos Szeredi } 910bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 911d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 912bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 913d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 914bb4f397aSAneesh Kumar K.V } 915bb4f397aSAneesh Kumar K.V } 916aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 917bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 918aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 919d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 920aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 921d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 922aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 923d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 924d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 925d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 92603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 927aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 928aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 929d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 930d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 931d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 932d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 933d9c9bef1SMiklos Szeredi } 934d9c9bef1SMiklos Szeredi #endif 93503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 936aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 937d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 938d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 939d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 940d9c9bef1SMiklos Szeredi #endif 94130773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 942d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 943d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 944d9c9bef1SMiklos Szeredi } 94530773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 94630773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 94730773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 94830773840STheodore Ts'o } 94930773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 95030773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 95130773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 95230773840STheodore Ts'o } 95330773840STheodore Ts'o 954571640caSEric Sandeen /* 955571640caSEric Sandeen * We're changing the default of barrier mount option, so 956571640caSEric Sandeen * let's always display its mount state so it's clear what its 957571640caSEric Sandeen * status is. 958571640caSEric Sandeen */ 959571640caSEric Sandeen seq_puts(seq, ",barrier="); 960571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 961cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 962cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 96339a4badeSJan Kara else if (test_opt(sb, JOURNAL_CHECKSUM)) 96439a4badeSJan Kara seq_puts(seq, ",journal_checksum"); 96525ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 96625ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 967dd919b98SAneesh Kumar K.V if (!test_opt(sb, DELALLOC)) 968dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 969dd919b98SAneesh Kumar K.V 970ac27a0ecSDave Kleikamp 971cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 972cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 973aa22df2cSAneesh Kumar K.V /* 974aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 975aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 976aa22df2cSAneesh Kumar K.V */ 977617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 978ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 979617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 980ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 981617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 982ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 983ac27a0ecSDave Kleikamp 984240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 985240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 986240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 987240799cdSTheodore Ts'o 9885bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 9895bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 9905bf5683aSHidehiro Kawai 991afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 99206705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 993afd4672dSTheodore Ts'o 9945328e635SEric Sandeen if (test_opt(sb, DISCARD)) 9955328e635SEric Sandeen seq_puts(seq, ",discard"); 9965328e635SEric Sandeen 997e3bb52aeSEric Sandeen if (test_opt(sb, NOLOAD)) 998e3bb52aeSEric Sandeen seq_puts(seq, ",norecovery"); 999e3bb52aeSEric Sandeen 1000744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) 1001744692dcSJiaying Zhang seq_puts(seq, ",dioread_nolock"); 1002744692dcSJiaying Zhang 1003617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 10040b8e58a1SAndreas Dilger 1005ac27a0ecSDave Kleikamp return 0; 1006ac27a0ecSDave Kleikamp } 1007ac27a0ecSDave Kleikamp 10081b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10091b961ac0SChristoph Hellwig u64 ino, u32 generation) 1010ac27a0ecSDave Kleikamp { 1011ac27a0ecSDave Kleikamp struct inode *inode; 1012ac27a0ecSDave Kleikamp 1013617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1014ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1015617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1016ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1017ac27a0ecSDave Kleikamp 1018ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1019ac27a0ecSDave Kleikamp * 1020617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1021ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1022ac27a0ecSDave Kleikamp * 1023ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1024ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1025ac27a0ecSDave Kleikamp */ 10261d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 10271d1fe1eeSDavid Howells if (IS_ERR(inode)) 10281d1fe1eeSDavid Howells return ERR_CAST(inode); 10291d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1030ac27a0ecSDave Kleikamp iput(inode); 1031ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1032ac27a0ecSDave Kleikamp } 10331b961ac0SChristoph Hellwig 10341b961ac0SChristoph Hellwig return inode; 1035ac27a0ecSDave Kleikamp } 10361b961ac0SChristoph Hellwig 10371b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10381b961ac0SChristoph Hellwig int fh_len, int fh_type) 10391b961ac0SChristoph Hellwig { 10401b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10411b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10421b961ac0SChristoph Hellwig } 10431b961ac0SChristoph Hellwig 10441b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10451b961ac0SChristoph Hellwig int fh_len, int fh_type) 10461b961ac0SChristoph Hellwig { 10471b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10481b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1049ac27a0ecSDave Kleikamp } 1050ac27a0ecSDave Kleikamp 1051c39a7f84SToshiyuki Okajima /* 1052c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1053c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1054c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1055c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1056c39a7f84SToshiyuki Okajima */ 10570b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10580b8e58a1SAndreas Dilger gfp_t wait) 1059c39a7f84SToshiyuki Okajima { 1060c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1061c39a7f84SToshiyuki Okajima 1062c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1063c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1064c39a7f84SToshiyuki Okajima return 0; 1065c39a7f84SToshiyuki Okajima if (journal) 1066c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1067c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1068c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1069c39a7f84SToshiyuki Okajima } 1070c39a7f84SToshiyuki Okajima 1071ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1072ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1073ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1074ac27a0ecSDave Kleikamp 1075617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1076617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1077617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1078617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1079617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 10806f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1081307ae18aSChristoph Hellwig char *path); 1082617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1083617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1084ac27a0ecSDave Kleikamp size_t len, loff_t off); 1085617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1086ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1087ac27a0ecSDave Kleikamp 108861e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 1089a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 109060e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1091a9e7f447SDmitry Monakhov #endif 1092617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1093617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1094617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1095617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1096a5b5ee32SJan Kara .write_info = ext4_write_info, 1097a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1098a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1099ac27a0ecSDave Kleikamp }; 1100ac27a0ecSDave Kleikamp 11010d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1102617ba13bSMingming Cao .quota_on = ext4_quota_on, 1103287a8095SChristoph Hellwig .quota_off = dquot_quota_off, 1104287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1105287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1106287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1107287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1108287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1109ac27a0ecSDave Kleikamp }; 1110ac27a0ecSDave Kleikamp #endif 1111ac27a0ecSDave Kleikamp 1112ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1113617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1114617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1115617ba13bSMingming Cao .write_inode = ext4_write_inode, 1116617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 1117617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 1118617ba13bSMingming Cao .put_super = ext4_put_super, 1119617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1120c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1121c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1122617ba13bSMingming Cao .statfs = ext4_statfs, 1123617ba13bSMingming Cao .remount_fs = ext4_remount, 1124617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 1125617ba13bSMingming Cao .show_options = ext4_show_options, 1126ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1127617ba13bSMingming Cao .quota_read = ext4_quota_read, 1128617ba13bSMingming Cao .quota_write = ext4_quota_write, 1129ac27a0ecSDave Kleikamp #endif 1130c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1131ac27a0ecSDave Kleikamp }; 1132ac27a0ecSDave Kleikamp 11339ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 11349ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 11359ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 11369ca92389STheodore Ts'o .write_inode = ext4_write_inode, 11379ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 11389ca92389STheodore Ts'o .delete_inode = ext4_delete_inode, 11399ca92389STheodore Ts'o .write_super = ext4_write_super, 11409ca92389STheodore Ts'o .put_super = ext4_put_super, 11419ca92389STheodore Ts'o .statfs = ext4_statfs, 11429ca92389STheodore Ts'o .remount_fs = ext4_remount, 11439ca92389STheodore Ts'o .clear_inode = ext4_clear_inode, 11449ca92389STheodore Ts'o .show_options = ext4_show_options, 11459ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 11469ca92389STheodore Ts'o .quota_read = ext4_quota_read, 11479ca92389STheodore Ts'o .quota_write = ext4_quota_write, 11489ca92389STheodore Ts'o #endif 11499ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 11509ca92389STheodore Ts'o }; 11519ca92389STheodore Ts'o 115239655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11531b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11541b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1155617ba13bSMingming Cao .get_parent = ext4_get_parent, 1156ac27a0ecSDave Kleikamp }; 1157ac27a0ecSDave Kleikamp 1158ac27a0ecSDave Kleikamp enum { 1159ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1160ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 116101436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1162ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 116306705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 116430773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1165c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1166818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1167ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1168296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1169ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11705a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 11715a20bdfcSJan Kara Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, 11725a20bdfcSJan Kara Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, 117301436ef2STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, 11746fd058f7STheodore Ts'o Opt_block_validity, Opt_noblock_validity, 11755328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1176744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 11775328e635SEric Sandeen Opt_discard, Opt_nodiscard, 1178ac27a0ecSDave Kleikamp }; 1179ac27a0ecSDave Kleikamp 1180a447c093SSteven Whitehouse static const match_table_t tokens = { 1181ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1182ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1183ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1184ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1185ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1186ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1187ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1188ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1189ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1190ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1191ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1192ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1193ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1194ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1195ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1196ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1197ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1198ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1199ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1200ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1201ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1202e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 1203ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1204ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1205ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 120630773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 120730773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1208ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1209ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1210818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1211818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1212ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1213ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1214ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1215ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12165bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12175bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1218ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1219ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1220ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1221ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1222ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1223ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12245a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1225ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1226ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1227ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1228ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1229ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 123006705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 123106705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 123225ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1233c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1234ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 123564769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1236dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 12376fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12386fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1239240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1240b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1241afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 124206705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 124306705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1244744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1245744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12465328e635SEric Sandeen {Opt_discard, "discard"}, 12475328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1248f3f12faaSJosef Bacik {Opt_err, NULL}, 1249ac27a0ecSDave Kleikamp }; 1250ac27a0ecSDave Kleikamp 1251617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1252ac27a0ecSDave Kleikamp { 1253617ba13bSMingming Cao ext4_fsblk_t sb_block; 1254ac27a0ecSDave Kleikamp char *options = (char *) *data; 1255ac27a0ecSDave Kleikamp 1256ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1257ac27a0ecSDave Kleikamp return 1; /* Default location */ 12580b8e58a1SAndreas Dilger 1259ac27a0ecSDave Kleikamp options += 3; 12600b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1261ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1262ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12634776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1264ac27a0ecSDave Kleikamp (char *) *data); 1265ac27a0ecSDave Kleikamp return 1; 1266ac27a0ecSDave Kleikamp } 1267ac27a0ecSDave Kleikamp if (*options == ',') 1268ac27a0ecSDave Kleikamp options++; 1269ac27a0ecSDave Kleikamp *data = (void *) options; 12700b8e58a1SAndreas Dilger 1271ac27a0ecSDave Kleikamp return sb_block; 1272ac27a0ecSDave Kleikamp } 1273ac27a0ecSDave Kleikamp 1274b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1275437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1276437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1277b3881f74STheodore Ts'o 127856c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 127956c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 128056c50f11SDmitry Monakhov { 128156c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 128256c50f11SDmitry Monakhov char *qname; 128356c50f11SDmitry Monakhov 128456c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 128556c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 128656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 128756c50f11SDmitry Monakhov "Cannot change journaled " 128856c50f11SDmitry Monakhov "quota options when quota turned on"); 128956c50f11SDmitry Monakhov return 0; 129056c50f11SDmitry Monakhov } 129156c50f11SDmitry Monakhov qname = match_strdup(args); 129256c50f11SDmitry Monakhov if (!qname) { 129356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 129456c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 129556c50f11SDmitry Monakhov return 0; 129656c50f11SDmitry Monakhov } 129756c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 129856c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 129956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 130056c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 130156c50f11SDmitry Monakhov kfree(qname); 130256c50f11SDmitry Monakhov return 0; 130356c50f11SDmitry Monakhov } 130456c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 130556c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 130656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 130756c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 130856c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 130956c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 131056c50f11SDmitry Monakhov return 0; 131156c50f11SDmitry Monakhov } 131256c50f11SDmitry Monakhov set_opt(sbi->s_mount_opt, QUOTA); 131356c50f11SDmitry Monakhov return 1; 131456c50f11SDmitry Monakhov } 131556c50f11SDmitry Monakhov 131656c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 131756c50f11SDmitry Monakhov { 131856c50f11SDmitry Monakhov 131956c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 132056c50f11SDmitry Monakhov 132156c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 132256c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 132356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 132456c50f11SDmitry Monakhov " when quota turned on"); 132556c50f11SDmitry Monakhov return 0; 132656c50f11SDmitry Monakhov } 132756c50f11SDmitry Monakhov /* 132856c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 132956c50f11SDmitry Monakhov * to be correct 133056c50f11SDmitry Monakhov */ 133156c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 133256c50f11SDmitry Monakhov return 1; 133356c50f11SDmitry Monakhov } 133456c50f11SDmitry Monakhov #endif 133556c50f11SDmitry Monakhov 1336ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1337c3191067STheodore Ts'o unsigned long *journal_devnum, 1338b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1339617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1340ac27a0ecSDave Kleikamp { 1341617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1342ac27a0ecSDave Kleikamp char *p; 1343ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1344ac27a0ecSDave Kleikamp int data_opt = 0; 1345ac27a0ecSDave Kleikamp int option; 1346ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 134756c50f11SDmitry Monakhov int qfmt; 1348ac27a0ecSDave Kleikamp #endif 1349ac27a0ecSDave Kleikamp 1350ac27a0ecSDave Kleikamp if (!options) 1351ac27a0ecSDave Kleikamp return 1; 1352ac27a0ecSDave Kleikamp 1353ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1354ac27a0ecSDave Kleikamp int token; 1355ac27a0ecSDave Kleikamp if (!*p) 1356ac27a0ecSDave Kleikamp continue; 1357ac27a0ecSDave Kleikamp 135815121c18SEric Sandeen /* 135915121c18SEric Sandeen * Initialize args struct so we know whether arg was 136015121c18SEric Sandeen * found; some options take optional arguments. 136115121c18SEric Sandeen */ 136215121c18SEric Sandeen args[0].to = args[0].from = 0; 1363ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1364ac27a0ecSDave Kleikamp switch (token) { 1365ac27a0ecSDave Kleikamp case Opt_bsd_df: 1366437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1367ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, MINIX_DF); 1368ac27a0ecSDave Kleikamp break; 1369ac27a0ecSDave Kleikamp case Opt_minix_df: 1370437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1371ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, MINIX_DF); 1372437ca0fdSDmitry Monakhov 1373ac27a0ecSDave Kleikamp break; 1374ac27a0ecSDave Kleikamp case Opt_grpid: 1375437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1376ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1377437ca0fdSDmitry Monakhov 1378ac27a0ecSDave Kleikamp break; 1379ac27a0ecSDave Kleikamp case Opt_nogrpid: 1380437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1381ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPID); 1382437ca0fdSDmitry Monakhov 1383ac27a0ecSDave Kleikamp break; 1384ac27a0ecSDave Kleikamp case Opt_resuid: 1385ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1386ac27a0ecSDave Kleikamp return 0; 1387ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1388ac27a0ecSDave Kleikamp break; 1389ac27a0ecSDave Kleikamp case Opt_resgid: 1390ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1391ac27a0ecSDave Kleikamp return 0; 1392ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1393ac27a0ecSDave Kleikamp break; 1394ac27a0ecSDave Kleikamp case Opt_sb: 1395ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1396ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1397ac27a0ecSDave Kleikamp break; 1398ac27a0ecSDave Kleikamp case Opt_err_panic: 1399ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1400ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1401ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1402ac27a0ecSDave Kleikamp break; 1403ac27a0ecSDave Kleikamp case Opt_err_ro: 1404ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1405ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1406ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1407ac27a0ecSDave Kleikamp break; 1408ac27a0ecSDave Kleikamp case Opt_err_cont: 1409ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1410ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1411ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_CONT); 1412ac27a0ecSDave Kleikamp break; 1413ac27a0ecSDave Kleikamp case Opt_nouid32: 1414ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 1415ac27a0ecSDave Kleikamp break; 1416ac27a0ecSDave Kleikamp case Opt_debug: 1417ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1418ac27a0ecSDave Kleikamp break; 1419ac27a0ecSDave Kleikamp case Opt_oldalloc: 1420ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, OLDALLOC); 1421ac27a0ecSDave Kleikamp break; 1422ac27a0ecSDave Kleikamp case Opt_orlov: 1423ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, OLDALLOC); 1424ac27a0ecSDave Kleikamp break; 142503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1426ac27a0ecSDave Kleikamp case Opt_user_xattr: 1427ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 1428ac27a0ecSDave Kleikamp break; 1429ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1430ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, XATTR_USER); 1431ac27a0ecSDave Kleikamp break; 1432ac27a0ecSDave Kleikamp #else 1433ac27a0ecSDave Kleikamp case Opt_user_xattr: 1434ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1435b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1436ac27a0ecSDave Kleikamp break; 1437ac27a0ecSDave Kleikamp #endif 143803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1439ac27a0ecSDave Kleikamp case Opt_acl: 1440ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1441ac27a0ecSDave Kleikamp break; 1442ac27a0ecSDave Kleikamp case Opt_noacl: 1443ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1444ac27a0ecSDave Kleikamp break; 1445ac27a0ecSDave Kleikamp #else 1446ac27a0ecSDave Kleikamp case Opt_acl: 1447ac27a0ecSDave Kleikamp case Opt_noacl: 1448b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1449ac27a0ecSDave Kleikamp break; 1450ac27a0ecSDave Kleikamp #endif 1451ac27a0ecSDave Kleikamp case Opt_journal_update: 1452ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1453ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1454ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1455ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1456ac27a0ecSDave Kleikamp journal file. */ 1457ac27a0ecSDave Kleikamp if (is_remount) { 1458b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1459b31e1552SEric Sandeen "Cannot specify journal on remount"); 1460ac27a0ecSDave Kleikamp return 0; 1461ac27a0ecSDave Kleikamp } 1462ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); 1463ac27a0ecSDave Kleikamp break; 1464ac27a0ecSDave Kleikamp case Opt_journal_dev: 1465ac27a0ecSDave Kleikamp if (is_remount) { 1466b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1467b31e1552SEric Sandeen "Cannot specify journal on remount"); 1468ac27a0ecSDave Kleikamp return 0; 1469ac27a0ecSDave Kleikamp } 1470ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1471ac27a0ecSDave Kleikamp return 0; 1472ac27a0ecSDave Kleikamp *journal_devnum = option; 1473ac27a0ecSDave Kleikamp break; 1474818d276cSGirish Shilamkar case Opt_journal_checksum: 1475d4da6c9cSLinus Torvalds set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1476d4da6c9cSLinus Torvalds break; 1477818d276cSGirish Shilamkar case Opt_journal_async_commit: 1478818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1479d4da6c9cSLinus Torvalds set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1480818d276cSGirish Shilamkar break; 1481ac27a0ecSDave Kleikamp case Opt_noload: 1482ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOLOAD); 1483ac27a0ecSDave Kleikamp break; 1484ac27a0ecSDave Kleikamp case Opt_commit: 1485ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1486ac27a0ecSDave Kleikamp return 0; 1487ac27a0ecSDave Kleikamp if (option < 0) 1488ac27a0ecSDave Kleikamp return 0; 1489ac27a0ecSDave Kleikamp if (option == 0) 1490cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1491ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1492ac27a0ecSDave Kleikamp break; 149330773840STheodore Ts'o case Opt_max_batch_time: 149430773840STheodore Ts'o if (match_int(&args[0], &option)) 149530773840STheodore Ts'o return 0; 149630773840STheodore Ts'o if (option < 0) 149730773840STheodore Ts'o return 0; 149830773840STheodore Ts'o if (option == 0) 149930773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 150030773840STheodore Ts'o sbi->s_max_batch_time = option; 150130773840STheodore Ts'o break; 150230773840STheodore Ts'o case Opt_min_batch_time: 150330773840STheodore Ts'o if (match_int(&args[0], &option)) 150430773840STheodore Ts'o return 0; 150530773840STheodore Ts'o if (option < 0) 150630773840STheodore Ts'o return 0; 150730773840STheodore Ts'o sbi->s_min_batch_time = option; 150830773840STheodore Ts'o break; 1509ac27a0ecSDave Kleikamp case Opt_data_journal: 1510617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1511ac27a0ecSDave Kleikamp goto datacheck; 1512ac27a0ecSDave Kleikamp case Opt_data_ordered: 1513617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1514ac27a0ecSDave Kleikamp goto datacheck; 1515ac27a0ecSDave Kleikamp case Opt_data_writeback: 1516617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1517ac27a0ecSDave Kleikamp datacheck: 1518ac27a0ecSDave Kleikamp if (is_remount) { 1519482a7425SDmitry Monakhov if (test_opt(sb, DATA_FLAGS) != data_opt) { 1520b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1521b31e1552SEric Sandeen "Cannot change data mode on remount"); 1522ac27a0ecSDave Kleikamp return 0; 1523ac27a0ecSDave Kleikamp } 1524ac27a0ecSDave Kleikamp } else { 1525482a7425SDmitry Monakhov clear_opt(sbi->s_mount_opt, DATA_FLAGS); 1526ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1527ac27a0ecSDave Kleikamp } 1528ac27a0ecSDave Kleikamp break; 15295bf5683aSHidehiro Kawai case Opt_data_err_abort: 15305bf5683aSHidehiro Kawai set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 15315bf5683aSHidehiro Kawai break; 15325bf5683aSHidehiro Kawai case Opt_data_err_ignore: 15335bf5683aSHidehiro Kawai clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 15345bf5683aSHidehiro Kawai break; 1535ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1536ac27a0ecSDave Kleikamp case Opt_usrjquota: 153756c50f11SDmitry Monakhov if (!set_qf_name(sb, USRQUOTA, &args[0])) 153856c50f11SDmitry Monakhov return 0; 153956c50f11SDmitry Monakhov break; 1540ac27a0ecSDave Kleikamp case Opt_grpjquota: 154156c50f11SDmitry Monakhov if (!set_qf_name(sb, GRPQUOTA, &args[0])) 1542ac27a0ecSDave Kleikamp return 0; 1543ac27a0ecSDave Kleikamp break; 1544ac27a0ecSDave Kleikamp case Opt_offusrjquota: 154556c50f11SDmitry Monakhov if (!clear_qf_name(sb, USRQUOTA)) 1546ac27a0ecSDave Kleikamp return 0; 1547ac27a0ecSDave Kleikamp break; 154856c50f11SDmitry Monakhov case Opt_offgrpjquota: 154956c50f11SDmitry Monakhov if (!clear_qf_name(sb, GRPQUOTA)) 155056c50f11SDmitry Monakhov return 0; 155156c50f11SDmitry Monakhov break; 155256c50f11SDmitry Monakhov 1553ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1554dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1555dfc5d03fSJan Kara goto set_qf_format; 1556ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1557dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 15585a20bdfcSJan Kara goto set_qf_format; 15595a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 15605a20bdfcSJan Kara qfmt = QFMT_VFS_V1; 1561dfc5d03fSJan Kara set_qf_format: 156217bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1563dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1564b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1565dfc5d03fSJan Kara "journaled quota options when " 1566b31e1552SEric Sandeen "quota turned on"); 1567dfc5d03fSJan Kara return 0; 1568dfc5d03fSJan Kara } 1569dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1570ac27a0ecSDave Kleikamp break; 1571ac27a0ecSDave Kleikamp case Opt_quota: 1572ac27a0ecSDave Kleikamp case Opt_usrquota: 1573ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1574ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1575ac27a0ecSDave Kleikamp break; 1576ac27a0ecSDave Kleikamp case Opt_grpquota: 1577ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1578ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1579ac27a0ecSDave Kleikamp break; 1580ac27a0ecSDave Kleikamp case Opt_noquota: 158117bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1582b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1583b31e1552SEric Sandeen "options when quota turned on"); 1584ac27a0ecSDave Kleikamp return 0; 1585ac27a0ecSDave Kleikamp } 1586ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1587ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1588ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1589ac27a0ecSDave Kleikamp break; 1590ac27a0ecSDave Kleikamp #else 1591ac27a0ecSDave Kleikamp case Opt_quota: 1592ac27a0ecSDave Kleikamp case Opt_usrquota: 1593ac27a0ecSDave Kleikamp case Opt_grpquota: 1594b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1595b31e1552SEric Sandeen "quota options not supported"); 1596cd59e7b9SJan Kara break; 1597ac27a0ecSDave Kleikamp case Opt_usrjquota: 1598ac27a0ecSDave Kleikamp case Opt_grpjquota: 1599ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1600ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1601ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1602ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 16035a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 1604b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1605b31e1552SEric Sandeen "journaled quota options not supported"); 1606ac27a0ecSDave Kleikamp break; 1607ac27a0ecSDave Kleikamp case Opt_noquota: 1608ac27a0ecSDave Kleikamp break; 1609ac27a0ecSDave Kleikamp #endif 1610ac27a0ecSDave Kleikamp case Opt_abort: 16114ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1612ac27a0ecSDave Kleikamp break; 161306705bffSTheodore Ts'o case Opt_nobarrier: 161406705bffSTheodore Ts'o clear_opt(sbi->s_mount_opt, BARRIER); 161506705bffSTheodore Ts'o break; 1616ac27a0ecSDave Kleikamp case Opt_barrier: 161715121c18SEric Sandeen if (args[0].from) { 161815121c18SEric Sandeen if (match_int(&args[0], &option)) 161915121c18SEric Sandeen return 0; 162015121c18SEric Sandeen } else 162115121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1622ac27a0ecSDave Kleikamp if (option) 1623ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1624ac27a0ecSDave Kleikamp else 1625ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1626ac27a0ecSDave Kleikamp break; 1627ac27a0ecSDave Kleikamp case Opt_ignore: 1628ac27a0ecSDave Kleikamp break; 1629ac27a0ecSDave Kleikamp case Opt_resize: 1630ac27a0ecSDave Kleikamp if (!is_remount) { 1631b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1632b31e1552SEric Sandeen "resize option only available " 1633b31e1552SEric Sandeen "for remount"); 1634ac27a0ecSDave Kleikamp return 0; 1635ac27a0ecSDave Kleikamp } 1636ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1637ac27a0ecSDave Kleikamp return 0; 1638ac27a0ecSDave Kleikamp *n_blocks_count = option; 1639ac27a0ecSDave Kleikamp break; 1640ac27a0ecSDave Kleikamp case Opt_nobh: 1641206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1642206f7ab4SChristoph Hellwig "Ignoring deprecated nobh option"); 1643ac27a0ecSDave Kleikamp break; 1644ac27a0ecSDave Kleikamp case Opt_bh: 1645206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1646206f7ab4SChristoph Hellwig "Ignoring deprecated bh option"); 1647ac27a0ecSDave Kleikamp break; 164825ec56b5SJean Noel Cordenner case Opt_i_version: 164925ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 165025ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 165125ec56b5SJean Noel Cordenner break; 1652dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1653dd919b98SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 1654dd919b98SAneesh Kumar K.V break; 1655c9de560dSAlex Tomas case Opt_stripe: 1656c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1657c9de560dSAlex Tomas return 0; 1658c9de560dSAlex Tomas if (option < 0) 1659c9de560dSAlex Tomas return 0; 1660c9de560dSAlex Tomas sbi->s_stripe = option; 1661c9de560dSAlex Tomas break; 166264769240SAlex Tomas case Opt_delalloc: 166364769240SAlex Tomas set_opt(sbi->s_mount_opt, DELALLOC); 166464769240SAlex Tomas break; 16656fd058f7STheodore Ts'o case Opt_block_validity: 16666fd058f7STheodore Ts'o set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 16676fd058f7STheodore Ts'o break; 16686fd058f7STheodore Ts'o case Opt_noblock_validity: 16696fd058f7STheodore Ts'o clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 16706fd058f7STheodore Ts'o break; 1671240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1672240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1673240799cdSTheodore Ts'o return 0; 1674240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1675240799cdSTheodore Ts'o return 0; 1676f7c43950STheodore Ts'o if (!is_power_of_2(option)) { 1677b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1678b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1679b31e1552SEric Sandeen " must be a power of 2"); 16803197ebdbSTheodore Ts'o return 0; 16813197ebdbSTheodore Ts'o } 1682240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1683240799cdSTheodore Ts'o break; 1684b3881f74STheodore Ts'o case Opt_journal_ioprio: 1685b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1686b3881f74STheodore Ts'o return 0; 1687b3881f74STheodore Ts'o if (option < 0 || option > 7) 1688b3881f74STheodore Ts'o break; 1689b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1690b3881f74STheodore Ts'o option); 1691b3881f74STheodore Ts'o break; 169206705bffSTheodore Ts'o case Opt_noauto_da_alloc: 169306705bffSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 169406705bffSTheodore Ts'o break; 1695afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 169615121c18SEric Sandeen if (args[0].from) { 169715121c18SEric Sandeen if (match_int(&args[0], &option)) 169815121c18SEric Sandeen return 0; 169915121c18SEric Sandeen } else 170015121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1701afd4672dSTheodore Ts'o if (option) 1702afd4672dSTheodore Ts'o clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); 1703afd4672dSTheodore Ts'o else 1704afd4672dSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 1705afd4672dSTheodore Ts'o break; 17065328e635SEric Sandeen case Opt_discard: 17075328e635SEric Sandeen set_opt(sbi->s_mount_opt, DISCARD); 17085328e635SEric Sandeen break; 17095328e635SEric Sandeen case Opt_nodiscard: 17105328e635SEric Sandeen clear_opt(sbi->s_mount_opt, DISCARD); 17115328e635SEric Sandeen break; 1712744692dcSJiaying Zhang case Opt_dioread_nolock: 1713744692dcSJiaying Zhang set_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 1714744692dcSJiaying Zhang break; 1715744692dcSJiaying Zhang case Opt_dioread_lock: 1716744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 1717744692dcSJiaying Zhang break; 1718ac27a0ecSDave Kleikamp default: 1719b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1720b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1721b31e1552SEric Sandeen "or missing value", p); 1722ac27a0ecSDave Kleikamp return 0; 1723ac27a0ecSDave Kleikamp } 1724ac27a0ecSDave Kleikamp } 1725ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1726ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1727482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1728ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1729ac27a0ecSDave Kleikamp 1730482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1731ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1732ac27a0ecSDave Kleikamp 173356c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1734b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1735b31e1552SEric Sandeen "format mixing"); 1736ac27a0ecSDave Kleikamp return 0; 1737ac27a0ecSDave Kleikamp } 1738ac27a0ecSDave Kleikamp 1739ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1740b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1741b31e1552SEric Sandeen "not specified"); 1742ac27a0ecSDave Kleikamp return 0; 1743ac27a0ecSDave Kleikamp } 1744ac27a0ecSDave Kleikamp } else { 1745ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1746b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 17472c8be6b2SJan Kara "specified with no journaling " 1748b31e1552SEric Sandeen "enabled"); 1749ac27a0ecSDave Kleikamp return 0; 1750ac27a0ecSDave Kleikamp } 1751ac27a0ecSDave Kleikamp } 1752ac27a0ecSDave Kleikamp #endif 1753ac27a0ecSDave Kleikamp return 1; 1754ac27a0ecSDave Kleikamp } 1755ac27a0ecSDave Kleikamp 1756617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1757ac27a0ecSDave Kleikamp int read_only) 1758ac27a0ecSDave Kleikamp { 1759617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1760ac27a0ecSDave Kleikamp int res = 0; 1761ac27a0ecSDave Kleikamp 1762617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1763b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1764b31e1552SEric Sandeen "forcing read-only mode"); 1765ac27a0ecSDave Kleikamp res = MS_RDONLY; 1766ac27a0ecSDave Kleikamp } 1767ac27a0ecSDave Kleikamp if (read_only) 1768ac27a0ecSDave Kleikamp return res; 1769617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1770b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1771b31e1552SEric Sandeen "running e2fsck is recommended"); 1772617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1773b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1774b31e1552SEric Sandeen "warning: mounting fs with errors, " 1775b31e1552SEric Sandeen "running e2fsck is recommended"); 1776ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1777ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1778ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1779b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1780b31e1552SEric Sandeen "warning: maximal mount count reached, " 1781b31e1552SEric Sandeen "running e2fsck is recommended"); 1782ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1783ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1784ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1785b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1786b31e1552SEric Sandeen "warning: checktime reached, " 1787b31e1552SEric Sandeen "running e2fsck is recommended"); 17880390131bSFrank Mayhar if (!sbi->s_journal) 1789216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1790ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1791617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1792e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1793ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1794617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 17950390131bSFrank Mayhar if (sbi->s_journal) 1796617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1797ac27a0ecSDave Kleikamp 1798e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1799ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1800a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 18017f4520ccSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x]\n", 1802ac27a0ecSDave Kleikamp sb->s_blocksize, 1803ac27a0ecSDave Kleikamp sbi->s_groups_count, 1804617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1805617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1806ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1807ac27a0ecSDave Kleikamp 1808ac27a0ecSDave Kleikamp return res; 1809ac27a0ecSDave Kleikamp } 1810ac27a0ecSDave Kleikamp 1811772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1812772cb7c8SJose R. Santos { 1813772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1814772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1815772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1816772cb7c8SJose R. Santos ext4_group_t flex_group; 1817772cb7c8SJose R. Santos int groups_per_flex = 0; 1818c5ca7c76STheodore Ts'o size_t size; 1819772cb7c8SJose R. Santos int i; 1820772cb7c8SJose R. Santos 1821503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1822503358aeSTheodore Ts'o groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1823503358aeSTheodore Ts'o 1824503358aeSTheodore Ts'o if (groups_per_flex < 2) { 1825772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1826772cb7c8SJose R. Santos return 1; 1827772cb7c8SJose R. Santos } 1828772cb7c8SJose R. Santos 1829c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1830c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1831d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1832d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1833c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 1834c5ca7c76STheodore Ts'o sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); 1835c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 1836c5ca7c76STheodore Ts'o sbi->s_flex_groups = vmalloc(size); 1837c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) 1838c5ca7c76STheodore Ts'o memset(sbi->s_flex_groups, 0, size); 1839c5ca7c76STheodore Ts'o } 1840772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1841b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory for " 1842b31e1552SEric Sandeen "%u flex groups", flex_group_count); 1843772cb7c8SJose R. Santos goto failed; 1844772cb7c8SJose R. Santos } 1845772cb7c8SJose R. Santos 1846772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 184788b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1848772cb7c8SJose R. Santos 1849772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 18507ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 18517ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 18527ad9bb65STheodore Ts'o atomic_add(ext4_free_blks_count(sb, gdp), 18537ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_blocks); 18547ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 18557ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1856772cb7c8SJose R. Santos } 1857772cb7c8SJose R. Santos 1858772cb7c8SJose R. Santos return 1; 1859772cb7c8SJose R. Santos failed: 1860772cb7c8SJose R. Santos return 0; 1861772cb7c8SJose R. Santos } 1862772cb7c8SJose R. Santos 1863717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1864717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1865717d50e4SAndreas Dilger { 1866717d50e4SAndreas Dilger __u16 crc = 0; 1867717d50e4SAndreas Dilger 1868717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1869717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1870717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1871717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1872717d50e4SAndreas Dilger 1873717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1874717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1875717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1876717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1877717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1878717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1879717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1880717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1881717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1882717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1883717d50e4SAndreas Dilger offset); 1884717d50e4SAndreas Dilger } 1885717d50e4SAndreas Dilger 1886717d50e4SAndreas Dilger return cpu_to_le16(crc); 1887717d50e4SAndreas Dilger } 1888717d50e4SAndreas Dilger 1889717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1890717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1891717d50e4SAndreas Dilger { 1892717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1893717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1894717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1895717d50e4SAndreas Dilger return 0; 1896717d50e4SAndreas Dilger 1897717d50e4SAndreas Dilger return 1; 1898717d50e4SAndreas Dilger } 1899717d50e4SAndreas Dilger 1900ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1901617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1902ac27a0ecSDave Kleikamp { 1903617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1904617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1905617ba13bSMingming Cao ext4_fsblk_t last_block; 1906bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1907bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1908bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1909ce421581SJose R. Santos int flexbg_flag = 0; 1910fd2d4291SAvantika Mathur ext4_group_t i; 1911ac27a0ecSDave Kleikamp 1912ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1913ce421581SJose R. Santos flexbg_flag = 1; 1914ce421581SJose R. Santos 1915617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 1916ac27a0ecSDave Kleikamp 1917197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1918197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1919197cd65aSAkinobu Mita 1920ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1921bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1922ac27a0ecSDave Kleikamp else 1923ac27a0ecSDave Kleikamp last_block = first_block + 1924617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1925ac27a0ecSDave Kleikamp 19268fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 19272b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 1928b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1929a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 1930b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 1931ac27a0ecSDave Kleikamp return 0; 1932ac27a0ecSDave Kleikamp } 19338fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 19342b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 1935b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1936a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 1937b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 1938ac27a0ecSDave Kleikamp return 0; 1939ac27a0ecSDave Kleikamp } 19408fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1941bd81d8eeSLaurent Vivier if (inode_table < first_block || 19422b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 1943b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1944a9df9a49STheodore Ts'o "Inode table for group %u not in group " 1945b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 1946ac27a0ecSDave Kleikamp return 0; 1947ac27a0ecSDave Kleikamp } 1948955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 1949717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1950b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1951b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 1952fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1953fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 19547ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 1955955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1956717d50e4SAndreas Dilger return 0; 1957717d50e4SAndreas Dilger } 19587ee1ec4cSLi Zefan } 1959955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1960ce421581SJose R. Santos if (!flexbg_flag) 1961617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 1962ac27a0ecSDave Kleikamp } 1963ac27a0ecSDave Kleikamp 1964bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1965617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 1966ac27a0ecSDave Kleikamp return 1; 1967ac27a0ecSDave Kleikamp } 1968ac27a0ecSDave Kleikamp 1969617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1970ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1971ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1972ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1973ac27a0ecSDave Kleikamp * 1974ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1975ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1976ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1977ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1978ac27a0ecSDave Kleikamp * 1979ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1980ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1981ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1982617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1983ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1984ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1985ac27a0ecSDave Kleikamp */ 1986617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 1987617ba13bSMingming Cao struct ext4_super_block *es) 1988ac27a0ecSDave Kleikamp { 1989ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1990ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1991ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1992ac27a0ecSDave Kleikamp int i; 1993ac27a0ecSDave Kleikamp #endif 1994ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1995ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1996ac27a0ecSDave Kleikamp return; 1997ac27a0ecSDave Kleikamp } 1998ac27a0ecSDave Kleikamp 1999a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2000b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2001b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2002a8f48a95SEric Sandeen return; 2003a8f48a95SEric Sandeen } 2004a8f48a95SEric Sandeen 2005617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2006ac27a0ecSDave Kleikamp if (es->s_last_orphan) 2007ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2008ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2009ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2010ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2011ac27a0ecSDave Kleikamp return; 2012ac27a0ecSDave Kleikamp } 2013ac27a0ecSDave Kleikamp 2014ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2015b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2016ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2017ac27a0ecSDave Kleikamp } 2018ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2019ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2020ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2021ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2022ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2023617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2024617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2025ac27a0ecSDave Kleikamp if (ret < 0) 2026b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2027b31e1552SEric Sandeen "Cannot turn on journaled " 2028b31e1552SEric Sandeen "quota: error %d", ret); 2029ac27a0ecSDave Kleikamp } 2030ac27a0ecSDave Kleikamp } 2031ac27a0ecSDave Kleikamp #endif 2032ac27a0ecSDave Kleikamp 2033ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2034ac27a0ecSDave Kleikamp struct inode *inode; 2035ac27a0ecSDave Kleikamp 203697bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 203797bd42b9SJosef Bacik if (IS_ERR(inode)) { 2038ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2039ac27a0ecSDave Kleikamp break; 2040ac27a0ecSDave Kleikamp } 2041ac27a0ecSDave Kleikamp 2042617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2043871a2931SChristoph Hellwig dquot_initialize(inode); 2044ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2045b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2046b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 204746e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2048e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2049ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2050617ba13bSMingming Cao ext4_truncate(inode); 2051ac27a0ecSDave Kleikamp nr_truncates++; 2052ac27a0ecSDave Kleikamp } else { 2053b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2054b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 205546e665e9SHarvey Harrison __func__, inode->i_ino); 2056ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2057ac27a0ecSDave Kleikamp inode->i_ino); 2058ac27a0ecSDave Kleikamp nr_orphans++; 2059ac27a0ecSDave Kleikamp } 2060ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2061ac27a0ecSDave Kleikamp } 2062ac27a0ecSDave Kleikamp 2063ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2064ac27a0ecSDave Kleikamp 2065ac27a0ecSDave Kleikamp if (nr_orphans) 2066b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2067b31e1552SEric Sandeen PLURAL(nr_orphans)); 2068ac27a0ecSDave Kleikamp if (nr_truncates) 2069b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2070b31e1552SEric Sandeen PLURAL(nr_truncates)); 2071ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2072ac27a0ecSDave Kleikamp /* Turn quotas off */ 2073ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2074ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2075287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2076ac27a0ecSDave Kleikamp } 2077ac27a0ecSDave Kleikamp #endif 2078ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2079ac27a0ecSDave Kleikamp } 20800b8e58a1SAndreas Dilger 2081cd2291a4SEric Sandeen /* 2082cd2291a4SEric Sandeen * Maximal extent format file size. 2083cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2084cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2085cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2086cd2291a4SEric Sandeen * so that won't be a limiting factor. 2087cd2291a4SEric Sandeen * 2088cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2089cd2291a4SEric Sandeen */ 2090f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2091cd2291a4SEric Sandeen { 2092cd2291a4SEric Sandeen loff_t res; 2093cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2094cd2291a4SEric Sandeen 2095cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2096f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2097cd2291a4SEric Sandeen /* 209890c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2099cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2100cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2101cd2291a4SEric Sandeen */ 2102cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2103cd2291a4SEric Sandeen 2104cd2291a4SEric Sandeen /* total blocks in file system block size */ 2105cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2106cd2291a4SEric Sandeen upper_limit <<= blkbits; 2107cd2291a4SEric Sandeen } 2108cd2291a4SEric Sandeen 2109cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 2110cd2291a4SEric Sandeen res = 1LL << 32; 2111cd2291a4SEric Sandeen res <<= blkbits; 2112cd2291a4SEric Sandeen res -= 1; 2113cd2291a4SEric Sandeen 2114cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2115cd2291a4SEric Sandeen if (res > upper_limit) 2116cd2291a4SEric Sandeen res = upper_limit; 2117cd2291a4SEric Sandeen 2118cd2291a4SEric Sandeen return res; 2119cd2291a4SEric Sandeen } 2120ac27a0ecSDave Kleikamp 2121ac27a0ecSDave Kleikamp /* 2122cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 21230fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 21240fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2125ac27a0ecSDave Kleikamp */ 2126f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2127ac27a0ecSDave Kleikamp { 2128617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 21290fc1b451SAneesh Kumar K.V int meta_blocks; 21300fc1b451SAneesh Kumar K.V loff_t upper_limit; 21310b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 21320b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 21330b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 21340b8e58a1SAndreas Dilger * 21350b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 21360b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 21370fc1b451SAneesh Kumar K.V */ 21380fc1b451SAneesh Kumar K.V 2139f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 21400fc1b451SAneesh Kumar K.V /* 214190c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 21420b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 21430b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 21440fc1b451SAneesh Kumar K.V */ 21450fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 21460fc1b451SAneesh Kumar K.V 21470fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 21480fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 21490fc1b451SAneesh Kumar K.V 21500fc1b451SAneesh Kumar K.V } else { 21518180a562SAneesh Kumar K.V /* 21528180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 21538180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 21548180a562SAneesh Kumar K.V * represent total number of blocks in 21558180a562SAneesh Kumar K.V * file system block size 21568180a562SAneesh Kumar K.V */ 21570fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 21580fc1b451SAneesh Kumar K.V 21590fc1b451SAneesh Kumar K.V } 21600fc1b451SAneesh Kumar K.V 21610fc1b451SAneesh Kumar K.V /* indirect blocks */ 21620fc1b451SAneesh Kumar K.V meta_blocks = 1; 21630fc1b451SAneesh Kumar K.V /* double indirect blocks */ 21640fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 21650fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 21660fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 21670fc1b451SAneesh Kumar K.V 21680fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 21690fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2170ac27a0ecSDave Kleikamp 2171ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2172ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2173ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2174ac27a0ecSDave Kleikamp res <<= bits; 2175ac27a0ecSDave Kleikamp if (res > upper_limit) 2176ac27a0ecSDave Kleikamp res = upper_limit; 21770fc1b451SAneesh Kumar K.V 21780fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 21790fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 21800fc1b451SAneesh Kumar K.V 2181ac27a0ecSDave Kleikamp return res; 2182ac27a0ecSDave Kleikamp } 2183ac27a0ecSDave Kleikamp 2184617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 218570bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2186ac27a0ecSDave Kleikamp { 2187617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2188fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2189ac27a0ecSDave Kleikamp int has_super = 0; 2190ac27a0ecSDave Kleikamp 2191ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2192ac27a0ecSDave Kleikamp 2193617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2194ac27a0ecSDave Kleikamp nr < first_meta_bg) 219570bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2196ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2197617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2198ac27a0ecSDave Kleikamp has_super = 1; 21990b8e58a1SAndreas Dilger 2200617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2201ac27a0ecSDave Kleikamp } 2202ac27a0ecSDave Kleikamp 2203c9de560dSAlex Tomas /** 2204c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2205c9de560dSAlex Tomas * @sbi: In memory super block info 2206c9de560dSAlex Tomas * 2207c9de560dSAlex Tomas * If we have specified it via mount option, then 2208c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2209c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2210c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2211c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2212c9de560dSAlex Tomas * 2213c9de560dSAlex Tomas */ 2214c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2215c9de560dSAlex Tomas { 2216c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2217c9de560dSAlex Tomas unsigned long stripe_width = 2218c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 2219c9de560dSAlex Tomas 2220c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 2221c9de560dSAlex Tomas return sbi->s_stripe; 2222c9de560dSAlex Tomas 2223c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 2224c9de560dSAlex Tomas return stripe_width; 2225c9de560dSAlex Tomas 2226c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 2227c9de560dSAlex Tomas return stride; 2228c9de560dSAlex Tomas 2229c9de560dSAlex Tomas return 0; 2230c9de560dSAlex Tomas } 2231ac27a0ecSDave Kleikamp 22323197ebdbSTheodore Ts'o /* sysfs supprt */ 22333197ebdbSTheodore Ts'o 22343197ebdbSTheodore Ts'o struct ext4_attr { 22353197ebdbSTheodore Ts'o struct attribute attr; 22363197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 22373197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 22383197ebdbSTheodore Ts'o const char *, size_t); 22393197ebdbSTheodore Ts'o int offset; 22403197ebdbSTheodore Ts'o }; 22413197ebdbSTheodore Ts'o 22423197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 22433197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 22443197ebdbSTheodore Ts'o { 22453197ebdbSTheodore Ts'o char *endp; 22463197ebdbSTheodore Ts'o 2247e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2248e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 22493197ebdbSTheodore Ts'o if (*endp || *value > max) 22503197ebdbSTheodore Ts'o return -EINVAL; 22513197ebdbSTheodore Ts'o 22523197ebdbSTheodore Ts'o return 0; 22533197ebdbSTheodore Ts'o } 22543197ebdbSTheodore Ts'o 22553197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 22563197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 22573197ebdbSTheodore Ts'o char *buf) 22583197ebdbSTheodore Ts'o { 22593197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 22603197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 22613197ebdbSTheodore Ts'o } 22623197ebdbSTheodore Ts'o 22633197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 22643197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 22653197ebdbSTheodore Ts'o { 22663197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 22673197ebdbSTheodore Ts'o 22683197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 22693197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 22703197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 22713197ebdbSTheodore Ts'o } 22723197ebdbSTheodore Ts'o 22733197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 22743197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 22753197ebdbSTheodore Ts'o { 22763197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 22773197ebdbSTheodore Ts'o 22783197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2279a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 22803197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2281a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 22823197ebdbSTheodore Ts'o } 22833197ebdbSTheodore Ts'o 22843197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 22853197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 22863197ebdbSTheodore Ts'o const char *buf, size_t count) 22873197ebdbSTheodore Ts'o { 22883197ebdbSTheodore Ts'o unsigned long t; 22893197ebdbSTheodore Ts'o 22903197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 22913197ebdbSTheodore Ts'o return -EINVAL; 22923197ebdbSTheodore Ts'o 2293f7c43950STheodore Ts'o if (!is_power_of_2(t)) 22943197ebdbSTheodore Ts'o return -EINVAL; 22953197ebdbSTheodore Ts'o 22963197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 22973197ebdbSTheodore Ts'o return count; 22983197ebdbSTheodore Ts'o } 22993197ebdbSTheodore Ts'o 23003197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 23013197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 23023197ebdbSTheodore Ts'o { 23033197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 23043197ebdbSTheodore Ts'o 23053197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 23063197ebdbSTheodore Ts'o } 23073197ebdbSTheodore Ts'o 23083197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 23093197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 23103197ebdbSTheodore Ts'o const char *buf, size_t count) 23113197ebdbSTheodore Ts'o { 23123197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 23133197ebdbSTheodore Ts'o unsigned long t; 23143197ebdbSTheodore Ts'o 23153197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 23163197ebdbSTheodore Ts'o return -EINVAL; 23173197ebdbSTheodore Ts'o *ui = t; 23183197ebdbSTheodore Ts'o return count; 23193197ebdbSTheodore Ts'o } 23203197ebdbSTheodore Ts'o 23213197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 23223197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 23233197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 23243197ebdbSTheodore Ts'o .show = _show, \ 23253197ebdbSTheodore Ts'o .store = _store, \ 23263197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 23273197ebdbSTheodore Ts'o } 23283197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 23293197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 23303197ebdbSTheodore Ts'o 23313197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 23323197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 23333197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 23343197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 23353197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 23363197ebdbSTheodore Ts'o 23373197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 23383197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 23393197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 23403197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 23413197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 234211013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 23433197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 23443197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 23453197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 23463197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 23473197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 23483197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 234955138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 23503197ebdbSTheodore Ts'o 23513197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 23523197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 23533197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 23543197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 23553197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 235611013911SAndreas Dilger ATTR_LIST(inode_goal), 23573197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 23583197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 23593197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 23603197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 23613197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 23623197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 236355138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 23643197ebdbSTheodore Ts'o NULL, 23653197ebdbSTheodore Ts'o }; 23663197ebdbSTheodore Ts'o 23673197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 23683197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 23693197ebdbSTheodore Ts'o { 23703197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 23713197ebdbSTheodore Ts'o s_kobj); 23723197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 23733197ebdbSTheodore Ts'o 23743197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 23753197ebdbSTheodore Ts'o } 23763197ebdbSTheodore Ts'o 23773197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 23783197ebdbSTheodore Ts'o struct attribute *attr, 23793197ebdbSTheodore Ts'o const char *buf, size_t len) 23803197ebdbSTheodore Ts'o { 23813197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 23823197ebdbSTheodore Ts'o s_kobj); 23833197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 23843197ebdbSTheodore Ts'o 23853197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 23863197ebdbSTheodore Ts'o } 23873197ebdbSTheodore Ts'o 23883197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 23893197ebdbSTheodore Ts'o { 23903197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 23913197ebdbSTheodore Ts'o s_kobj); 23923197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 23933197ebdbSTheodore Ts'o } 23943197ebdbSTheodore Ts'o 23953197ebdbSTheodore Ts'o 239652cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 23973197ebdbSTheodore Ts'o .show = ext4_attr_show, 23983197ebdbSTheodore Ts'o .store = ext4_attr_store, 23993197ebdbSTheodore Ts'o }; 24003197ebdbSTheodore Ts'o 24013197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 24023197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 24033197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 24043197ebdbSTheodore Ts'o .release = ext4_sb_release, 24053197ebdbSTheodore Ts'o }; 24063197ebdbSTheodore Ts'o 2407a13fb1a4SEric Sandeen /* 2408a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2409a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2410a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2411a13fb1a4SEric Sandeen * 0 if it cannot be. 2412a13fb1a4SEric Sandeen */ 2413a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2414a13fb1a4SEric Sandeen { 2415a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2416a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2417a13fb1a4SEric Sandeen "Couldn't mount because of " 2418a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2419a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2420a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2421a13fb1a4SEric Sandeen return 0; 2422a13fb1a4SEric Sandeen } 2423a13fb1a4SEric Sandeen 2424a13fb1a4SEric Sandeen if (readonly) 2425a13fb1a4SEric Sandeen return 1; 2426a13fb1a4SEric Sandeen 2427a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2428a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2429a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2430a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2431a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2432a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2433a13fb1a4SEric Sandeen return 0; 2434a13fb1a4SEric Sandeen } 2435a13fb1a4SEric Sandeen /* 2436a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2437a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2438a13fb1a4SEric Sandeen */ 2439a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2440a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2441a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2442a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2443a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2444a13fb1a4SEric Sandeen return 0; 2445a13fb1a4SEric Sandeen } 2446a13fb1a4SEric Sandeen } 2447a13fb1a4SEric Sandeen return 1; 2448a13fb1a4SEric Sandeen } 2449a13fb1a4SEric Sandeen 2450617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 24517477827fSAneesh Kumar K.V __releases(kernel_lock) 24527477827fSAneesh Kumar K.V __acquires(kernel_lock) 2453ac27a0ecSDave Kleikamp { 2454d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 2455ac27a0ecSDave Kleikamp struct buffer_head *bh; 2456617ba13bSMingming Cao struct ext4_super_block *es = NULL; 2457617ba13bSMingming Cao struct ext4_sb_info *sbi; 2458617ba13bSMingming Cao ext4_fsblk_t block; 2459617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 246070bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 2461ac27a0ecSDave Kleikamp unsigned long offset = 0; 2462ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 2463ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 2464ac27a0ecSDave Kleikamp struct inode *root; 24659f6200bbSTheodore Ts'o char *cp; 24660390131bSFrank Mayhar const char *descr; 24671d1fe1eeSDavid Howells int ret = -EINVAL; 2468ac27a0ecSDave Kleikamp int blocksize; 24694ec11028STheodore Ts'o unsigned int db_count; 24704ec11028STheodore Ts'o unsigned int i; 2471f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 2472bd81d8eeSLaurent Vivier __u64 blocks_count; 2473833f4077SPeter Zijlstra int err; 2474b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 2475ac27a0ecSDave Kleikamp 2476ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 2477ac27a0ecSDave Kleikamp if (!sbi) 2478ac27a0ecSDave Kleikamp return -ENOMEM; 2479705895b6SPekka Enberg 2480705895b6SPekka Enberg sbi->s_blockgroup_lock = 2481705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 2482705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 2483705895b6SPekka Enberg kfree(sbi); 2484705895b6SPekka Enberg return -ENOMEM; 2485705895b6SPekka Enberg } 2486ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 2487ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 2488617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 2489617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 2490240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 2491d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 2492afc32f7eSTheodore Ts'o sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, 2493afc32f7eSTheodore Ts'o sectors[1]); 2494ac27a0ecSDave Kleikamp 2495ac27a0ecSDave Kleikamp unlock_kernel(); 2496ac27a0ecSDave Kleikamp 24979f6200bbSTheodore Ts'o /* Cleanup superblock name */ 24989f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 24999f6200bbSTheodore Ts'o *cp = '!'; 25009f6200bbSTheodore Ts'o 2501617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 2502ac27a0ecSDave Kleikamp if (!blocksize) { 2503b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 2504ac27a0ecSDave Kleikamp goto out_fail; 2505ac27a0ecSDave Kleikamp } 2506ac27a0ecSDave Kleikamp 2507ac27a0ecSDave Kleikamp /* 2508617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 2509ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 2510ac27a0ecSDave Kleikamp */ 2511617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 251270bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 251370bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 2514ac27a0ecSDave Kleikamp } else { 251570bbb3e0SAndrew Morton logical_sb_block = sb_block; 2516ac27a0ecSDave Kleikamp } 2517ac27a0ecSDave Kleikamp 251870bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 2519b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 2520ac27a0ecSDave Kleikamp goto out_fail; 2521ac27a0ecSDave Kleikamp } 2522ac27a0ecSDave Kleikamp /* 2523ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 2524617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 2525ac27a0ecSDave Kleikamp */ 2526617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2527ac27a0ecSDave Kleikamp sbi->s_es = es; 2528ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 2529617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 2530617ba13bSMingming Cao goto cantfind_ext4; 2531afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 2532ac27a0ecSDave Kleikamp 2533ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 2534ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 2535617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 2536ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 2537437ca0fdSDmitry Monakhov if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { 2538437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", 2539437ca0fdSDmitry Monakhov "2.6.38"); 2540ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 2541437ca0fdSDmitry Monakhov } 2542617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 2543ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 254403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 2545617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 2546ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 25472e7842b8SHugh Dickins #endif 254803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 2549617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 2550ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 25512e7842b8SHugh Dickins #endif 2552617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 2553482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2554617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 2555482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, ORDERED_DATA); 2556617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 2557482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 2558ac27a0ecSDave Kleikamp 2559617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 2560ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 2561bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 2562ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 2563bb4f397aSAneesh Kumar K.V else 2564bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 2565ac27a0ecSDave Kleikamp 2566ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 2567ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 256830773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 256930773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 257030773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 2571ac27a0ecSDave Kleikamp 2572571640caSEric Sandeen set_opt(sbi->s_mount_opt, BARRIER); 2573ac27a0ecSDave Kleikamp 25741e2462f9SMingming Cao /* 2575dd919b98SAneesh Kumar K.V * enable delayed allocation by default 2576dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 2577dd919b98SAneesh Kumar K.V */ 2578ba69f9abSJan Kara if (!IS_EXT3_SB(sb)) 2579dd919b98SAneesh Kumar K.V set_opt(sbi->s_mount_opt, DELALLOC); 2580dd919b98SAneesh Kumar K.V 2581b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 2582b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 2583ac27a0ecSDave Kleikamp goto failed_mount; 2584ac27a0ecSDave Kleikamp 2585ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2586482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 2587ac27a0ecSDave Kleikamp 2588617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 2589617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 2590617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 2591617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 2592b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2593b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 2594b31e1552SEric Sandeen "running e2fsck is recommended"); 2595469108ffSTheodore Tso 2596469108ffSTheodore Tso /* 2597ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 2598ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 2599ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 2600ac27a0ecSDave Kleikamp */ 2601a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 2602ac27a0ecSDave Kleikamp goto failed_mount; 2603a13fb1a4SEric Sandeen 2604ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 2605ac27a0ecSDave Kleikamp 2606617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 2607617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 2608b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2609b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 2610ac27a0ecSDave Kleikamp goto failed_mount; 2611ac27a0ecSDave Kleikamp } 2612ac27a0ecSDave Kleikamp 2613ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 2614ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 2615ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 2616b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 2617ce40733cSAneesh Kumar K.V blocksize); 2618ac27a0ecSDave Kleikamp goto failed_mount; 2619ac27a0ecSDave Kleikamp } 2620ac27a0ecSDave Kleikamp 2621ac27a0ecSDave Kleikamp brelse(bh); 262270bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 262370bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 262470bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 2625ac27a0ecSDave Kleikamp if (!bh) { 2626b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2627b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 2628ac27a0ecSDave Kleikamp goto failed_mount; 2629ac27a0ecSDave Kleikamp } 2630617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 2631ac27a0ecSDave Kleikamp sbi->s_es = es; 2632617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 2633b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2634b31e1552SEric Sandeen "Magic mismatch, very weird!"); 2635ac27a0ecSDave Kleikamp goto failed_mount; 2636ac27a0ecSDave Kleikamp } 2637ac27a0ecSDave Kleikamp } 2638ac27a0ecSDave Kleikamp 2639a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2640a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 2641f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 2642f287a1a5STheodore Ts'o has_huge_files); 2643f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 2644ac27a0ecSDave Kleikamp 2645617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 2646617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 2647617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 2648ac27a0ecSDave Kleikamp } else { 2649ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2650ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2651617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 26521330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2653ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2654b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2655b31e1552SEric Sandeen "unsupported inode size: %d", 2656ac27a0ecSDave Kleikamp sbi->s_inode_size); 2657ac27a0ecSDave Kleikamp goto failed_mount; 2658ac27a0ecSDave Kleikamp } 2659ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2660ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2661ac27a0ecSDave Kleikamp } 26620b8e58a1SAndreas Dilger 26630d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 26640d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 26658fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 26660d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2667d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 2668b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2669b31e1552SEric Sandeen "unsupported descriptor size %lu", 26700d1ee42fSAlexandre Ratchov sbi->s_desc_size); 26710d1ee42fSAlexandre Ratchov goto failed_mount; 26720d1ee42fSAlexandre Ratchov } 26730d1ee42fSAlexandre Ratchov } else 26740d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 26750b8e58a1SAndreas Dilger 2676ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2677ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2678b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2679617ba13bSMingming Cao goto cantfind_ext4; 26800b8e58a1SAndreas Dilger 2681617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2682ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2683617ba13bSMingming Cao goto cantfind_ext4; 2684ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2685ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 26860d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2687ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2688ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2689e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2690e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 26910b8e58a1SAndreas Dilger 2692ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 2693ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2694ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2695f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 2696f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 2697f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2698f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 2699f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 2700f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 2701f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2702f99b2589STheodore Ts'o #else 2703f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 2704f99b2589STheodore Ts'o #endif 2705f99b2589STheodore Ts'o sb->s_dirt = 1; 2706f99b2589STheodore Ts'o } 2707ac27a0ecSDave Kleikamp 2708ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2709b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2710b31e1552SEric Sandeen "#blocks per group too big: %lu", 2711ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2712ac27a0ecSDave Kleikamp goto failed_mount; 2713ac27a0ecSDave Kleikamp } 2714ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2715b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2716b31e1552SEric Sandeen "#inodes per group too big: %lu", 2717ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2718ac27a0ecSDave Kleikamp goto failed_mount; 2719ac27a0ecSDave Kleikamp } 2720ac27a0ecSDave Kleikamp 2721bf43d84bSEric Sandeen /* 2722bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 2723bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 2724bf43d84bSEric Sandeen */ 2725bf43d84bSEric Sandeen if ((ext4_blocks_count(es) > 2726bf43d84bSEric Sandeen (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) || 2727bf43d84bSEric Sandeen (ext4_blocks_count(es) > 2728bf43d84bSEric Sandeen (pgoff_t)(~0ULL) >> (PAGE_CACHE_SHIFT - sb->s_blocksize_bits))) { 2729b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 2730bf43d84bSEric Sandeen " too large to mount safely on this system"); 2731ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 273290c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 2733bf43d84bSEric Sandeen ret = -EFBIG; 2734ac27a0ecSDave Kleikamp goto failed_mount; 2735ac27a0ecSDave Kleikamp } 2736ac27a0ecSDave Kleikamp 2737617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2738617ba13bSMingming Cao goto cantfind_ext4; 2739e7c95593SEric Sandeen 27400f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 27410f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 27420f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 2743b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 2744b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 27450f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 27460f2ddca6SFrom: Thiemo Nagel goto failed_mount; 27470f2ddca6SFrom: Thiemo Nagel } 27480f2ddca6SFrom: Thiemo Nagel 27494ec11028STheodore Ts'o /* 27504ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 27514ec11028STheodore Ts'o * of the filesystem. 27524ec11028STheodore Ts'o */ 27534ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 2754b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 2755b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 2756e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 27574ec11028STheodore Ts'o ext4_blocks_count(es)); 2758e7c95593SEric Sandeen goto failed_mount; 2759e7c95593SEric Sandeen } 2760bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2761bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2762bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2763bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 27644ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 2765b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 27664ec11028STheodore Ts'o "(block count %llu, first data block %u, " 2767b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 27684ec11028STheodore Ts'o ext4_blocks_count(es), 27694ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 27704ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 27714ec11028STheodore Ts'o goto failed_mount; 27724ec11028STheodore Ts'o } 2773bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2774fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 2775fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 2776617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2777617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2778ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 2779ac27a0ecSDave Kleikamp GFP_KERNEL); 2780ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2781b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 2782ac27a0ecSDave Kleikamp goto failed_mount; 2783ac27a0ecSDave Kleikamp } 2784ac27a0ecSDave Kleikamp 27853244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 27869f6200bbSTheodore Ts'o if (ext4_proc_root) 27879f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 27883244fcb1SAlexander Beregalov #endif 2789240799cdSTheodore Ts'o 2790705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 2791ac27a0ecSDave Kleikamp 2792ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 279370bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2794ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2795ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2796b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2797b31e1552SEric Sandeen "can't read group descriptor %d", i); 2798ac27a0ecSDave Kleikamp db_count = i; 2799ac27a0ecSDave Kleikamp goto failed_mount2; 2800ac27a0ecSDave Kleikamp } 2801ac27a0ecSDave Kleikamp } 2802617ba13bSMingming Cao if (!ext4_check_descriptors(sb)) { 2803b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 2804ac27a0ecSDave Kleikamp goto failed_mount2; 2805ac27a0ecSDave Kleikamp } 2806772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2807772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 2808b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2809b31e1552SEric Sandeen "unable to initialize " 2810b31e1552SEric Sandeen "flex_bg meta info!"); 2811772cb7c8SJose R. Santos goto failed_mount2; 2812772cb7c8SJose R. Santos } 2813772cb7c8SJose R. Santos 2814ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2815ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2816ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2817ac27a0ecSDave Kleikamp 2818c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 281955138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 2820c9de560dSAlex Tomas 2821ac27a0ecSDave Kleikamp /* 2822ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2823ac27a0ecSDave Kleikamp */ 28249ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 28259ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 2826617ba13bSMingming Cao sb->s_op = &ext4_sops; 28279ca92389STheodore Ts'o else 28289ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 2829617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2830617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2831ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2832617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2833617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2834ac27a0ecSDave Kleikamp #endif 2835ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 28363b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 283732ed5058STheodore Ts'o mutex_init(&sbi->s_resize_lock); 2838ac27a0ecSDave Kleikamp 2839ac27a0ecSDave Kleikamp sb->s_root = NULL; 2840ac27a0ecSDave Kleikamp 2841ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2842617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2843617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2844ac27a0ecSDave Kleikamp 2845ac27a0ecSDave Kleikamp /* 2846ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2847ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2848ac27a0ecSDave Kleikamp */ 2849ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2850617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2851617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2852ac27a0ecSDave Kleikamp goto failed_mount3; 28530390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 28540390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2855b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 2856b31e1552SEric Sandeen "suppressed and not mounted read-only"); 2857744692dcSJiaying Zhang goto failed_mount_wq; 2858ac27a0ecSDave Kleikamp } else { 28590390131bSFrank Mayhar clear_opt(sbi->s_mount_opt, DATA_FLAGS); 28600390131bSFrank Mayhar set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 28610390131bSFrank Mayhar sbi->s_journal = NULL; 28620390131bSFrank Mayhar needs_recovery = 0; 28630390131bSFrank Mayhar goto no_journal; 2864ac27a0ecSDave Kleikamp } 2865ac27a0ecSDave Kleikamp 2866eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2867eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2868eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2869b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 2870744692dcSJiaying Zhang goto failed_mount_wq; 2871eb40a09cSJose R. Santos } 2872eb40a09cSJose R. Santos 2873d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 2874d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 2875d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2876d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2877d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 2878818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2879818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2880818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2881818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2882d4da6c9cSLinus Torvalds } else { 2883d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 2884d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2885d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2886d4da6c9cSLinus Torvalds } 2887818d276cSGirish Shilamkar 2888ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2889ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2890ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 2891ac27a0ecSDave Kleikamp case 0: 2892ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 289363f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 289463f57933SAndrew Morton * cope, else JOURNAL_DATA 289563f57933SAndrew Morton */ 2896dab291afSMingming Cao if (jbd2_journal_check_available_features 2897dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 2898ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 2899ac27a0ecSDave Kleikamp else 2900ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2901ac27a0ecSDave Kleikamp break; 2902ac27a0ecSDave Kleikamp 2903617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 2904617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 2905dab291afSMingming Cao if (!jbd2_journal_check_available_features 2906dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 2907b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 2908b31e1552SEric Sandeen "requested data journaling mode"); 2909744692dcSJiaying Zhang goto failed_mount_wq; 2910ac27a0ecSDave Kleikamp } 2911ac27a0ecSDave Kleikamp default: 2912ac27a0ecSDave Kleikamp break; 2913ac27a0ecSDave Kleikamp } 2914b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 2915ac27a0ecSDave Kleikamp 29160390131bSFrank Mayhar no_journal: 291784061e07SDmitry Monakhov err = percpu_counter_init(&sbi->s_freeblocks_counter, 291884061e07SDmitry Monakhov ext4_count_free_blocks(sb)); 291984061e07SDmitry Monakhov if (!err) 292084061e07SDmitry Monakhov err = percpu_counter_init(&sbi->s_freeinodes_counter, 292184061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 292284061e07SDmitry Monakhov if (!err) 292384061e07SDmitry Monakhov err = percpu_counter_init(&sbi->s_dirs_counter, 292484061e07SDmitry Monakhov ext4_count_dirs(sb)); 292584061e07SDmitry Monakhov if (!err) 292684061e07SDmitry Monakhov err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 292784061e07SDmitry Monakhov if (err) { 292884061e07SDmitry Monakhov ext4_msg(sb, KERN_ERR, "insufficient memory"); 292984061e07SDmitry Monakhov goto failed_mount_wq; 293084061e07SDmitry Monakhov } 2931206f7ab4SChristoph Hellwig 29324c0425ffSMingming Cao EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); 29334c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 29344c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 29354c0425ffSMingming Cao goto failed_mount_wq; 29364c0425ffSMingming Cao } 29374c0425ffSMingming Cao 2938ac27a0ecSDave Kleikamp /* 2939dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 2940ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 2941ac27a0ecSDave Kleikamp */ 2942ac27a0ecSDave Kleikamp 29431d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 29441d1fe1eeSDavid Howells if (IS_ERR(root)) { 2945b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 29461d1fe1eeSDavid Howells ret = PTR_ERR(root); 2947ac27a0ecSDave Kleikamp goto failed_mount4; 2948ac27a0ecSDave Kleikamp } 2949ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 29501d1fe1eeSDavid Howells iput(root); 2951b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 2952ac27a0ecSDave Kleikamp goto failed_mount4; 2953ac27a0ecSDave Kleikamp } 29541d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 29551d1fe1eeSDavid Howells if (!sb->s_root) { 2956b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 29571d1fe1eeSDavid Howells iput(root); 29581d1fe1eeSDavid Howells ret = -ENOMEM; 29591d1fe1eeSDavid Howells goto failed_mount4; 29601d1fe1eeSDavid Howells } 2961ac27a0ecSDave Kleikamp 2962617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 2963ef7f3835SKalpak Shah 2964ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 2965ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 2966ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2967ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2968ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 2969ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 2970ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2971ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 2972ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2973ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 2974ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2975ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 2976ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2977ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 2978ef7f3835SKalpak Shah } 2979ef7f3835SKalpak Shah } 2980ef7f3835SKalpak Shah /* Check if enough inode space is available */ 2981ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 2982ef7f3835SKalpak Shah sbi->s_inode_size) { 2983ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2984ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2985b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 2986b31e1552SEric Sandeen "available"); 2987ef7f3835SKalpak Shah } 2988ef7f3835SKalpak Shah 298990576c0bSTheodore Ts'o if (test_opt(sb, DELALLOC) && 299090576c0bSTheodore Ts'o (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 2991b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " 2992b31e1552SEric Sandeen "requested data journaling mode"); 2993c2774d84SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 299490576c0bSTheodore Ts'o } 2995744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) { 2996744692dcSJiaying Zhang if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 2997744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 2998744692dcSJiaying Zhang "option - requested data journaling mode"); 2999744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 3000744692dcSJiaying Zhang } 3001744692dcSJiaying Zhang if (sb->s_blocksize < PAGE_SIZE) { 3002744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 3003744692dcSJiaying Zhang "option - block size is too small"); 3004744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 3005744692dcSJiaying Zhang } 3006744692dcSJiaying Zhang } 3007c2774d84SAneesh Kumar K.V 30086fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 30096fd058f7STheodore Ts'o if (err) { 3010b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3011fbe845ddSCurt Wohlgemuth "zone (%d)", err); 30126fd058f7STheodore Ts'o goto failed_mount4; 30136fd058f7STheodore Ts'o } 30146fd058f7STheodore Ts'o 3015c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 3016c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 3017c2774d84SAneesh Kumar K.V if (err) { 3018b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initalize mballoc (%d)", 3019c2774d84SAneesh Kumar K.V err); 3020c2774d84SAneesh Kumar K.V goto failed_mount4; 3021c2774d84SAneesh Kumar K.V } 3022c2774d84SAneesh Kumar K.V 30233197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 30243197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 30253197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 30263197ebdbSTheodore Ts'o "%s", sb->s_id); 30273197ebdbSTheodore Ts'o if (err) { 30283197ebdbSTheodore Ts'o ext4_mb_release(sb); 30293197ebdbSTheodore Ts'o ext4_ext_release(sb); 30303197ebdbSTheodore Ts'o goto failed_mount4; 30313197ebdbSTheodore Ts'o }; 30323197ebdbSTheodore Ts'o 3033617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3034617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3035617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 30360390131bSFrank Mayhar if (needs_recovery) { 3037b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3038617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 30390390131bSFrank Mayhar } 30400390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 30410390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 30420390131bSFrank Mayhar descr = " journalled data mode"; 30430390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 30440390131bSFrank Mayhar descr = " ordered data mode"; 30450390131bSFrank Mayhar else 30460390131bSFrank Mayhar descr = " writeback data mode"; 30470390131bSFrank Mayhar } else 30480390131bSFrank Mayhar descr = "out journal"; 30490390131bSFrank Mayhar 3050d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 3051d4c402d9SCurt Wohlgemuth "Opts: %s", descr, orig_data); 3052ac27a0ecSDave Kleikamp 3053ac27a0ecSDave Kleikamp lock_kernel(); 3054d4c402d9SCurt Wohlgemuth kfree(orig_data); 3055ac27a0ecSDave Kleikamp return 0; 3056ac27a0ecSDave Kleikamp 3057617ba13bSMingming Cao cantfind_ext4: 3058ac27a0ecSDave Kleikamp if (!silent) 3059b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3060ac27a0ecSDave Kleikamp goto failed_mount; 3061ac27a0ecSDave Kleikamp 3062ac27a0ecSDave Kleikamp failed_mount4: 3063b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 30644c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 30654c0425ffSMingming Cao failed_mount_wq: 30666fd058f7STheodore Ts'o ext4_release_system_zone(sb); 30670390131bSFrank Mayhar if (sbi->s_journal) { 3068dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 306947b4a50bSJan Kara sbi->s_journal = NULL; 30700390131bSFrank Mayhar } 307184061e07SDmitry Monakhov percpu_counter_destroy(&sbi->s_freeblocks_counter); 307284061e07SDmitry Monakhov percpu_counter_destroy(&sbi->s_freeinodes_counter); 307384061e07SDmitry Monakhov percpu_counter_destroy(&sbi->s_dirs_counter); 307484061e07SDmitry Monakhov percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 3075ac27a0ecSDave Kleikamp failed_mount3: 3076c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) { 3077c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 3078c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 3079c5ca7c76STheodore Ts'o else 3080c5ca7c76STheodore Ts'o kfree(sbi->s_flex_groups); 3081c5ca7c76STheodore Ts'o } 3082ac27a0ecSDave Kleikamp failed_mount2: 3083ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 3084ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 3085ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 3086ac27a0ecSDave Kleikamp failed_mount: 3087240799cdSTheodore Ts'o if (sbi->s_proc) { 30889f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 3089240799cdSTheodore Ts'o } 3090ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3091ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3092ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3093ac27a0ecSDave Kleikamp #endif 3094617ba13bSMingming Cao ext4_blkdev_remove(sbi); 3095ac27a0ecSDave Kleikamp brelse(bh); 3096ac27a0ecSDave Kleikamp out_fail: 3097ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 3098f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 3099ac27a0ecSDave Kleikamp kfree(sbi); 3100ac27a0ecSDave Kleikamp lock_kernel(); 3101d4c402d9SCurt Wohlgemuth kfree(orig_data); 31021d1fe1eeSDavid Howells return ret; 3103ac27a0ecSDave Kleikamp } 3104ac27a0ecSDave Kleikamp 3105ac27a0ecSDave Kleikamp /* 3106ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 3107ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 3108ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 3109ac27a0ecSDave Kleikamp */ 3110617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3111ac27a0ecSDave Kleikamp { 3112617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3113ac27a0ecSDave Kleikamp 3114ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 311530773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 311630773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3117ac27a0ecSDave Kleikamp 3118ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 3119ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3120dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3121ac27a0ecSDave Kleikamp else 3122dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 31235bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 31245bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 31255bf5683aSHidehiro Kawai else 31265bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3127ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 3128ac27a0ecSDave Kleikamp } 3129ac27a0ecSDave Kleikamp 3130617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3131ac27a0ecSDave Kleikamp unsigned int journal_inum) 3132ac27a0ecSDave Kleikamp { 3133ac27a0ecSDave Kleikamp struct inode *journal_inode; 3134ac27a0ecSDave Kleikamp journal_t *journal; 3135ac27a0ecSDave Kleikamp 31360390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 31370390131bSFrank Mayhar 3138ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3139ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3140ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3141ac27a0ecSDave Kleikamp 31421d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 31431d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3144b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3145ac27a0ecSDave Kleikamp return NULL; 3146ac27a0ecSDave Kleikamp } 3147ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3148ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3149ac27a0ecSDave Kleikamp iput(journal_inode); 3150b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3151ac27a0ecSDave Kleikamp return NULL; 3152ac27a0ecSDave Kleikamp } 3153ac27a0ecSDave Kleikamp 3154e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3155ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 31561d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3157b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3158ac27a0ecSDave Kleikamp iput(journal_inode); 3159ac27a0ecSDave Kleikamp return NULL; 3160ac27a0ecSDave Kleikamp } 3161ac27a0ecSDave Kleikamp 3162dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3163ac27a0ecSDave Kleikamp if (!journal) { 3164b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3165ac27a0ecSDave Kleikamp iput(journal_inode); 3166ac27a0ecSDave Kleikamp return NULL; 3167ac27a0ecSDave Kleikamp } 3168ac27a0ecSDave Kleikamp journal->j_private = sb; 3169617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3170ac27a0ecSDave Kleikamp return journal; 3171ac27a0ecSDave Kleikamp } 3172ac27a0ecSDave Kleikamp 3173617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3174ac27a0ecSDave Kleikamp dev_t j_dev) 3175ac27a0ecSDave Kleikamp { 3176ac27a0ecSDave Kleikamp struct buffer_head *bh; 3177ac27a0ecSDave Kleikamp journal_t *journal; 3178617ba13bSMingming Cao ext4_fsblk_t start; 3179617ba13bSMingming Cao ext4_fsblk_t len; 3180ac27a0ecSDave Kleikamp int hblock, blocksize; 3181617ba13bSMingming Cao ext4_fsblk_t sb_block; 3182ac27a0ecSDave Kleikamp unsigned long offset; 3183617ba13bSMingming Cao struct ext4_super_block *es; 3184ac27a0ecSDave Kleikamp struct block_device *bdev; 3185ac27a0ecSDave Kleikamp 31860390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 31870390131bSFrank Mayhar 3188b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3189ac27a0ecSDave Kleikamp if (bdev == NULL) 3190ac27a0ecSDave Kleikamp return NULL; 3191ac27a0ecSDave Kleikamp 3192ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 3193b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3194b31e1552SEric Sandeen "failed to claim external journal device"); 31959a1c3542SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 3196ac27a0ecSDave Kleikamp return NULL; 3197ac27a0ecSDave Kleikamp } 3198ac27a0ecSDave Kleikamp 3199ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3200e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3201ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3202b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3203b31e1552SEric Sandeen "blocksize too small for journal device"); 3204ac27a0ecSDave Kleikamp goto out_bdev; 3205ac27a0ecSDave Kleikamp } 3206ac27a0ecSDave Kleikamp 3207617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3208617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3209ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3210ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3211b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3212b31e1552SEric Sandeen "external journal"); 3213ac27a0ecSDave Kleikamp goto out_bdev; 3214ac27a0ecSDave Kleikamp } 3215ac27a0ecSDave Kleikamp 3216617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3217617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3218ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3219617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3220b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3221b31e1552SEric Sandeen "bad superblock"); 3222ac27a0ecSDave Kleikamp brelse(bh); 3223ac27a0ecSDave Kleikamp goto out_bdev; 3224ac27a0ecSDave Kleikamp } 3225ac27a0ecSDave Kleikamp 3226617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3227b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3228ac27a0ecSDave Kleikamp brelse(bh); 3229ac27a0ecSDave Kleikamp goto out_bdev; 3230ac27a0ecSDave Kleikamp } 3231ac27a0ecSDave Kleikamp 3232bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3233ac27a0ecSDave Kleikamp start = sb_block + 1; 3234ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3235ac27a0ecSDave Kleikamp 3236dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3237ac27a0ecSDave Kleikamp start, len, blocksize); 3238ac27a0ecSDave Kleikamp if (!journal) { 3239b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3240ac27a0ecSDave Kleikamp goto out_bdev; 3241ac27a0ecSDave Kleikamp } 3242ac27a0ecSDave Kleikamp journal->j_private = sb; 3243ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3244ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3245ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3246b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3247ac27a0ecSDave Kleikamp goto out_journal; 3248ac27a0ecSDave Kleikamp } 3249ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3250b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3251b31e1552SEric Sandeen "user (unsupported) - %d", 3252ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3253ac27a0ecSDave Kleikamp goto out_journal; 3254ac27a0ecSDave Kleikamp } 3255617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3256617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3257ac27a0ecSDave Kleikamp return journal; 32580b8e58a1SAndreas Dilger 3259ac27a0ecSDave Kleikamp out_journal: 3260dab291afSMingming Cao jbd2_journal_destroy(journal); 3261ac27a0ecSDave Kleikamp out_bdev: 3262617ba13bSMingming Cao ext4_blkdev_put(bdev); 3263ac27a0ecSDave Kleikamp return NULL; 3264ac27a0ecSDave Kleikamp } 3265ac27a0ecSDave Kleikamp 3266617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3267617ba13bSMingming Cao struct ext4_super_block *es, 3268ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3269ac27a0ecSDave Kleikamp { 3270ac27a0ecSDave Kleikamp journal_t *journal; 3271ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3272ac27a0ecSDave Kleikamp dev_t journal_dev; 3273ac27a0ecSDave Kleikamp int err = 0; 3274ac27a0ecSDave Kleikamp int really_read_only; 3275ac27a0ecSDave Kleikamp 32760390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 32770390131bSFrank Mayhar 3278ac27a0ecSDave Kleikamp if (journal_devnum && 3279ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3280b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3281b31e1552SEric Sandeen "numbers have changed"); 3282ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3283ac27a0ecSDave Kleikamp } else 3284ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3285ac27a0ecSDave Kleikamp 3286ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3287ac27a0ecSDave Kleikamp 3288ac27a0ecSDave Kleikamp /* 3289ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3290ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3291ac27a0ecSDave Kleikamp * can get read-write access to the device. 3292ac27a0ecSDave Kleikamp */ 3293617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3294ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3295b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3296b31e1552SEric Sandeen "required on readonly filesystem"); 3297ac27a0ecSDave Kleikamp if (really_read_only) { 3298b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3299b31e1552SEric Sandeen "unavailable, cannot proceed"); 3300ac27a0ecSDave Kleikamp return -EROFS; 3301ac27a0ecSDave Kleikamp } 3302b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 3303b31e1552SEric Sandeen "be enabled during recovery"); 3304ac27a0ecSDave Kleikamp } 3305ac27a0ecSDave Kleikamp } 3306ac27a0ecSDave Kleikamp 3307ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3308b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 3309b31e1552SEric Sandeen "and inode journals!"); 3310ac27a0ecSDave Kleikamp return -EINVAL; 3311ac27a0ecSDave Kleikamp } 3312ac27a0ecSDave Kleikamp 3313ac27a0ecSDave Kleikamp if (journal_inum) { 3314617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3315ac27a0ecSDave Kleikamp return -EINVAL; 3316ac27a0ecSDave Kleikamp } else { 3317617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3318ac27a0ecSDave Kleikamp return -EINVAL; 3319ac27a0ecSDave Kleikamp } 3320ac27a0ecSDave Kleikamp 332190576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 3322b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 33234776004fSTheodore Ts'o 3324ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 3325dab291afSMingming Cao err = jbd2_journal_update_format(journal); 3326ac27a0ecSDave Kleikamp if (err) { 3327b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 3328dab291afSMingming Cao jbd2_journal_destroy(journal); 3329ac27a0ecSDave Kleikamp return err; 3330ac27a0ecSDave Kleikamp } 3331ac27a0ecSDave Kleikamp } 3332ac27a0ecSDave Kleikamp 3333617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3334dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 3335ac27a0ecSDave Kleikamp if (!err) 3336dab291afSMingming Cao err = jbd2_journal_load(journal); 3337ac27a0ecSDave Kleikamp 3338ac27a0ecSDave Kleikamp if (err) { 3339b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 3340dab291afSMingming Cao jbd2_journal_destroy(journal); 3341ac27a0ecSDave Kleikamp return err; 3342ac27a0ecSDave Kleikamp } 3343ac27a0ecSDave Kleikamp 3344617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 3345617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3346ac27a0ecSDave Kleikamp 3347ac27a0ecSDave Kleikamp if (journal_devnum && 3348ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3349ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 3350ac27a0ecSDave Kleikamp 3351ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 3352e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3353ac27a0ecSDave Kleikamp } 3354ac27a0ecSDave Kleikamp 3355ac27a0ecSDave Kleikamp return 0; 3356ac27a0ecSDave Kleikamp } 3357ac27a0ecSDave Kleikamp 3358e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 3359ac27a0ecSDave Kleikamp { 3360e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3361617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 3362c4be0c1dSTakashi Sato int error = 0; 3363ac27a0ecSDave Kleikamp 3364ac27a0ecSDave Kleikamp if (!sbh) 3365c4be0c1dSTakashi Sato return error; 3366914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 3367914258bfSTheodore Ts'o /* 3368914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 3369914258bfSTheodore Ts'o * superblock failed. This could happen because the 3370914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 3371914258bfSTheodore Ts'o * be a transient write error and maybe the block will 3372914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 3373914258bfSTheodore Ts'o * write and hope for the best. 3374914258bfSTheodore Ts'o */ 3375b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 3376b31e1552SEric Sandeen "superblock detected"); 3377914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3378914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3379914258bfSTheodore Ts'o } 338071290b36STheodore Ts'o /* 338171290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 338271290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 338371290b36STheodore Ts'o * write time when we are mounting the root file system 338471290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 338571290b36STheodore Ts'o * for people who are east of GMT and who make their clock 338671290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 338771290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 338871290b36STheodore Ts'o * to complain and force a full file system check. 338971290b36STheodore Ts'o */ 339071290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 3391ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 3392afc32f7eSTheodore Ts'o es->s_kbytes_written = 3393afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 3394afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 3395afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 33965d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 33975d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 33985d1b1b3fSAneesh Kumar K.V es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( 33995d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 34007234ab2aSTheodore Ts'o sb->s_dirt = 0; 3401ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 3402ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 3403914258bfSTheodore Ts'o if (sync) { 3404c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 3405c4be0c1dSTakashi Sato if (error) 3406c4be0c1dSTakashi Sato return error; 3407c4be0c1dSTakashi Sato 3408c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 3409c4be0c1dSTakashi Sato if (error) { 3410b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 3411b31e1552SEric Sandeen "superblock"); 3412914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3413914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3414914258bfSTheodore Ts'o } 3415914258bfSTheodore Ts'o } 3416c4be0c1dSTakashi Sato return error; 3417ac27a0ecSDave Kleikamp } 3418ac27a0ecSDave Kleikamp 3419ac27a0ecSDave Kleikamp /* 3420ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 3421ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 3422ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 3423ac27a0ecSDave Kleikamp */ 3424617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 3425617ba13bSMingming Cao struct ext4_super_block *es) 3426ac27a0ecSDave Kleikamp { 3427617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 3428ac27a0ecSDave Kleikamp 34290390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 34300390131bSFrank Mayhar BUG_ON(journal != NULL); 34310390131bSFrank Mayhar return; 34320390131bSFrank Mayhar } 3433dab291afSMingming Cao jbd2_journal_lock_updates(journal); 34347ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 34357ffe1ea8SHidehiro Kawai goto out; 34367ffe1ea8SHidehiro Kawai 3437617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 3438ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 3439617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3440e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3441ac27a0ecSDave Kleikamp } 34427ffe1ea8SHidehiro Kawai 34437ffe1ea8SHidehiro Kawai out: 3444dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 3445ac27a0ecSDave Kleikamp } 3446ac27a0ecSDave Kleikamp 3447ac27a0ecSDave Kleikamp /* 3448ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 3449ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 3450ac27a0ecSDave Kleikamp * main filesystem now. 3451ac27a0ecSDave Kleikamp */ 3452617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 3453617ba13bSMingming Cao struct ext4_super_block *es) 3454ac27a0ecSDave Kleikamp { 3455ac27a0ecSDave Kleikamp journal_t *journal; 3456ac27a0ecSDave Kleikamp int j_errno; 3457ac27a0ecSDave Kleikamp const char *errstr; 3458ac27a0ecSDave Kleikamp 34590390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 34600390131bSFrank Mayhar 3461617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 3462ac27a0ecSDave Kleikamp 3463ac27a0ecSDave Kleikamp /* 3464ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 3465617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 3466ac27a0ecSDave Kleikamp */ 3467ac27a0ecSDave Kleikamp 3468dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 3469ac27a0ecSDave Kleikamp if (j_errno) { 3470ac27a0ecSDave Kleikamp char nbuf[16]; 3471ac27a0ecSDave Kleikamp 3472617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 347312062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 3474ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 347512062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 3476ac27a0ecSDave Kleikamp 3477617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3478617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3479e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3480ac27a0ecSDave Kleikamp 3481dab291afSMingming Cao jbd2_journal_clear_err(journal); 3482ac27a0ecSDave Kleikamp } 3483ac27a0ecSDave Kleikamp } 3484ac27a0ecSDave Kleikamp 3485ac27a0ecSDave Kleikamp /* 3486ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 3487ac27a0ecSDave Kleikamp * and wait on the commit. 3488ac27a0ecSDave Kleikamp */ 3489617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 3490ac27a0ecSDave Kleikamp { 3491ac27a0ecSDave Kleikamp journal_t *journal; 34920390131bSFrank Mayhar int ret = 0; 3493ac27a0ecSDave Kleikamp 3494ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 3495ac27a0ecSDave Kleikamp return 0; 3496ac27a0ecSDave Kleikamp 3497617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 34986b0310fbSEric Sandeen if (journal) { 34996b0310fbSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_WRITE); 3500617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 35016b0310fbSEric Sandeen } 35020390131bSFrank Mayhar 3503ac27a0ecSDave Kleikamp return ret; 3504ac27a0ecSDave Kleikamp } 3505ac27a0ecSDave Kleikamp 3506617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 3507ac27a0ecSDave Kleikamp { 3508ebc1ac16SChristoph Hellwig lock_super(sb); 3509e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3510ebc1ac16SChristoph Hellwig unlock_super(sb); 35110390131bSFrank Mayhar } 3512ac27a0ecSDave Kleikamp 3513617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 3514ac27a0ecSDave Kleikamp { 351514ce0cb4STheodore Ts'o int ret = 0; 35169eddacf9SJan Kara tid_t target; 35178d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3518ac27a0ecSDave Kleikamp 35199bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 35208d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 35218d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 3522ac27a0ecSDave Kleikamp if (wait) 35238d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 35240390131bSFrank Mayhar } 352514ce0cb4STheodore Ts'o return ret; 3526ac27a0ecSDave Kleikamp } 3527ac27a0ecSDave Kleikamp 3528ac27a0ecSDave Kleikamp /* 3529ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 3530ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 3531ac27a0ecSDave Kleikamp */ 3532c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 3533ac27a0ecSDave Kleikamp { 3534c4be0c1dSTakashi Sato int error = 0; 3535c4be0c1dSTakashi Sato journal_t *journal; 3536ac27a0ecSDave Kleikamp 35379ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 35389ca92389STheodore Ts'o return 0; 35399ca92389STheodore Ts'o 3540c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 3541ac27a0ecSDave Kleikamp 3542ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 3543dab291afSMingming Cao jbd2_journal_lock_updates(journal); 35447ffe1ea8SHidehiro Kawai 35457ffe1ea8SHidehiro Kawai /* 35469ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 35479ca92389STheodore Ts'o * the journal. 35487ffe1ea8SHidehiro Kawai */ 3549c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 35506b0310fbSEric Sandeen if (error < 0) 35516b0310fbSEric Sandeen goto out; 3552ac27a0ecSDave Kleikamp 3553ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 3554617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3555e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 35566b0310fbSEric Sandeen out: 35576b0310fbSEric Sandeen /* we rely on s_frozen to stop further updates */ 35586b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 35596b0310fbSEric Sandeen return error; 3560ac27a0ecSDave Kleikamp } 3561ac27a0ecSDave Kleikamp 3562ac27a0ecSDave Kleikamp /* 3563ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 3564ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 3565ac27a0ecSDave Kleikamp */ 3566c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 3567ac27a0ecSDave Kleikamp { 35689ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 35699ca92389STheodore Ts'o return 0; 35709ca92389STheodore Ts'o 3571ac27a0ecSDave Kleikamp lock_super(sb); 35729ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 3573617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3574e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3575ac27a0ecSDave Kleikamp unlock_super(sb); 3576c4be0c1dSTakashi Sato return 0; 3577ac27a0ecSDave Kleikamp } 3578ac27a0ecSDave Kleikamp 3579617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 3580ac27a0ecSDave Kleikamp { 3581617ba13bSMingming Cao struct ext4_super_block *es; 3582617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3583617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 3584ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 3585617ba13bSMingming Cao struct ext4_mount_options old_opts; 3586c79d967dSChristoph Hellwig int enable_quota = 0; 35878a266467STheodore Ts'o ext4_group_t g; 3588b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3589ac27a0ecSDave Kleikamp int err; 3590ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3591ac27a0ecSDave Kleikamp int i; 3592ac27a0ecSDave Kleikamp #endif 3593d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3594ac27a0ecSDave Kleikamp 3595337eb00aSAlessio Igor Bogani lock_kernel(); 3596337eb00aSAlessio Igor Bogani 3597ac27a0ecSDave Kleikamp /* Store the original options */ 3598bbd6851aSAl Viro lock_super(sb); 3599ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 3600ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 3601ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 3602ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 3603ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 360430773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 360530773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 3606ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3607ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 3608ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3609ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 3610ac27a0ecSDave Kleikamp #endif 3611b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 3612b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 3613ac27a0ecSDave Kleikamp 3614ac27a0ecSDave Kleikamp /* 3615ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 3616ac27a0ecSDave Kleikamp */ 3617b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 3618b3881f74STheodore Ts'o &n_blocks_count, 1)) { 3619ac27a0ecSDave Kleikamp err = -EINVAL; 3620ac27a0ecSDave Kleikamp goto restore_opts; 3621ac27a0ecSDave Kleikamp } 3622ac27a0ecSDave Kleikamp 36234ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 3624c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 3625ac27a0ecSDave Kleikamp 3626ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3627482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3628ac27a0ecSDave Kleikamp 3629ac27a0ecSDave Kleikamp es = sbi->s_es; 3630ac27a0ecSDave Kleikamp 3631b3881f74STheodore Ts'o if (sbi->s_journal) { 3632617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 3633b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3634b3881f74STheodore Ts'o } 3635ac27a0ecSDave Kleikamp 3636ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 3637bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 36384ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 3639ac27a0ecSDave Kleikamp err = -EROFS; 3640ac27a0ecSDave Kleikamp goto restore_opts; 3641ac27a0ecSDave Kleikamp } 3642ac27a0ecSDave Kleikamp 3643ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 36440f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 36450f0dd62fSChristoph Hellwig if (err < 0) 3646c79d967dSChristoph Hellwig goto restore_opts; 3647c79d967dSChristoph Hellwig 3648ac27a0ecSDave Kleikamp /* 3649ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 3650ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 3651ac27a0ecSDave Kleikamp */ 3652ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 3653ac27a0ecSDave Kleikamp 3654ac27a0ecSDave Kleikamp /* 3655ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 3656ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 3657ac27a0ecSDave Kleikamp * mark the partition as valid again. 3658ac27a0ecSDave Kleikamp */ 3659617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 3660617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 3661ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 3662ac27a0ecSDave Kleikamp 3663a63c9eb2STheodore Ts'o if (sbi->s_journal) 3664617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 3665ac27a0ecSDave Kleikamp } else { 3666a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 3667a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 3668ac27a0ecSDave Kleikamp err = -EROFS; 3669ac27a0ecSDave Kleikamp goto restore_opts; 3670ac27a0ecSDave Kleikamp } 3671ead6596bSEric Sandeen /* 36728a266467STheodore Ts'o * Make sure the group descriptor checksums 36730b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 36748a266467STheodore Ts'o */ 36758a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 36768a266467STheodore Ts'o struct ext4_group_desc *gdp = 36778a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 36788a266467STheodore Ts'o 36798a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 3680b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3681b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 36828a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 36838a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 36848a266467STheodore Ts'o err = -EINVAL; 36858a266467STheodore Ts'o goto restore_opts; 36868a266467STheodore Ts'o } 36878a266467STheodore Ts'o } 36888a266467STheodore Ts'o 36898a266467STheodore Ts'o /* 3690ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 3691ead6596bSEric Sandeen * around from a previously readonly bdev mount, 3692ead6596bSEric Sandeen * require a full umount/remount for now. 3693ead6596bSEric Sandeen */ 3694ead6596bSEric Sandeen if (es->s_last_orphan) { 3695b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 3696ead6596bSEric Sandeen "remount RDWR because of unprocessed " 3697ead6596bSEric Sandeen "orphan inode list. Please " 3698b31e1552SEric Sandeen "umount/remount instead"); 3699ead6596bSEric Sandeen err = -EINVAL; 3700ead6596bSEric Sandeen goto restore_opts; 3701ead6596bSEric Sandeen } 3702ead6596bSEric Sandeen 3703ac27a0ecSDave Kleikamp /* 3704ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 3705ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 3706ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 3707ac27a0ecSDave Kleikamp * the partition.) 3708ac27a0ecSDave Kleikamp */ 37090390131bSFrank Mayhar if (sbi->s_journal) 3710617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3711ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3712617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 3713ac27a0ecSDave Kleikamp goto restore_opts; 3714617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 3715ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 3716c79d967dSChristoph Hellwig enable_quota = 1; 3717ac27a0ecSDave Kleikamp } 3718ac27a0ecSDave Kleikamp } 37196fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 37200390131bSFrank Mayhar if (sbi->s_journal == NULL) 3721e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 37220390131bSFrank Mayhar 3723ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3724ac27a0ecSDave Kleikamp /* Release old quota file names */ 3725ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3726ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 3727ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3728ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 3729ac27a0ecSDave Kleikamp #endif 3730bbd6851aSAl Viro unlock_super(sb); 3731337eb00aSAlessio Igor Bogani unlock_kernel(); 3732c79d967dSChristoph Hellwig if (enable_quota) 37330f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 3734d4c402d9SCurt Wohlgemuth 3735d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 3736d4c402d9SCurt Wohlgemuth kfree(orig_data); 3737ac27a0ecSDave Kleikamp return 0; 37380b8e58a1SAndreas Dilger 3739ac27a0ecSDave Kleikamp restore_opts: 3740ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 3741ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 3742ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 3743ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 3744ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 374530773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 374630773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 3747ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3748ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 3749ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 3750ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 3751ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3752ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3753ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 3754ac27a0ecSDave Kleikamp } 3755ac27a0ecSDave Kleikamp #endif 3756bbd6851aSAl Viro unlock_super(sb); 3757337eb00aSAlessio Igor Bogani unlock_kernel(); 3758d4c402d9SCurt Wohlgemuth kfree(orig_data); 3759ac27a0ecSDave Kleikamp return err; 3760ac27a0ecSDave Kleikamp } 3761ac27a0ecSDave Kleikamp 3762617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 3763ac27a0ecSDave Kleikamp { 3764ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 3765617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3766617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 3767960cc398SPekka Enberg u64 fsid; 3768ac27a0ecSDave Kleikamp 37695e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 37705e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 37716bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 37728df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 37735e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 3774ac27a0ecSDave Kleikamp 3775ac27a0ecSDave Kleikamp /* 37765e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 37775e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 37785e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 3779ac27a0ecSDave Kleikamp */ 3780ac27a0ecSDave Kleikamp 3781ac27a0ecSDave Kleikamp /* 3782ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 3783ac27a0ecSDave Kleikamp * overhead 3784ac27a0ecSDave Kleikamp */ 3785ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 3786ac27a0ecSDave Kleikamp 3787ac27a0ecSDave Kleikamp /* 3788ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 3789ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 3790ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 3791ac27a0ecSDave Kleikamp */ 3792ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 3793617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 3794617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 3795ac27a0ecSDave Kleikamp cond_resched(); 3796ac27a0ecSDave Kleikamp } 3797ac27a0ecSDave Kleikamp 3798ac27a0ecSDave Kleikamp /* 3799ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 3800ac27a0ecSDave Kleikamp * bitmap, and an inode table. 3801ac27a0ecSDave Kleikamp */ 38025e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 38035e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 38045e70030dSBadari Pulavarty smp_wmb(); 38056bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 3806ac27a0ecSDave Kleikamp } 3807ac27a0ecSDave Kleikamp 3808617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 3809ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 38105e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 38116bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 38126bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 3813bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 3814bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 3815ac27a0ecSDave Kleikamp buf->f_bavail = 0; 3816ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 381752d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 3818617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 3819960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 3820960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 3821960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 3822960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 38230b8e58a1SAndreas Dilger 3824ac27a0ecSDave Kleikamp return 0; 3825ac27a0ecSDave Kleikamp } 3826ac27a0ecSDave Kleikamp 38270b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 38280b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 3829ac27a0ecSDave Kleikamp * Process 1 Process 2 3830617ba13bSMingming Cao * ext4_create() quota_sync() 3831dab291afSMingming Cao * jbd2_journal_start() write_dquot() 3832871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 3833dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 3834ac27a0ecSDave Kleikamp * 3835ac27a0ecSDave Kleikamp */ 3836ac27a0ecSDave Kleikamp 3837ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3838ac27a0ecSDave Kleikamp 3839ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3840ac27a0ecSDave Kleikamp { 3841ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3842ac27a0ecSDave Kleikamp } 3843ac27a0ecSDave Kleikamp 3844617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3845ac27a0ecSDave Kleikamp { 3846ac27a0ecSDave Kleikamp int ret, err; 3847ac27a0ecSDave Kleikamp handle_t *handle; 3848ac27a0ecSDave Kleikamp struct inode *inode; 3849ac27a0ecSDave Kleikamp 3850ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3851617ba13bSMingming Cao handle = ext4_journal_start(inode, 3852617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3853ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3854ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3855ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3856617ba13bSMingming Cao err = ext4_journal_stop(handle); 3857ac27a0ecSDave Kleikamp if (!ret) 3858ac27a0ecSDave Kleikamp ret = err; 3859ac27a0ecSDave Kleikamp return ret; 3860ac27a0ecSDave Kleikamp } 3861ac27a0ecSDave Kleikamp 3862617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3863ac27a0ecSDave Kleikamp { 3864ac27a0ecSDave Kleikamp int ret, err; 3865ac27a0ecSDave Kleikamp handle_t *handle; 3866ac27a0ecSDave Kleikamp 3867617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3868617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3869ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3870ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3871ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 3872617ba13bSMingming Cao err = ext4_journal_stop(handle); 3873ac27a0ecSDave Kleikamp if (!ret) 3874ac27a0ecSDave Kleikamp ret = err; 3875ac27a0ecSDave Kleikamp return ret; 3876ac27a0ecSDave Kleikamp } 3877ac27a0ecSDave Kleikamp 3878617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 3879ac27a0ecSDave Kleikamp { 3880ac27a0ecSDave Kleikamp int ret, err; 3881ac27a0ecSDave Kleikamp handle_t *handle; 3882ac27a0ecSDave Kleikamp 3883617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3884617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 38859c3013e9SJan Kara if (IS_ERR(handle)) { 38869c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 38879c3013e9SJan Kara dquot_release(dquot); 3888ac27a0ecSDave Kleikamp return PTR_ERR(handle); 38899c3013e9SJan Kara } 3890ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 3891617ba13bSMingming Cao err = ext4_journal_stop(handle); 3892ac27a0ecSDave Kleikamp if (!ret) 3893ac27a0ecSDave Kleikamp ret = err; 3894ac27a0ecSDave Kleikamp return ret; 3895ac27a0ecSDave Kleikamp } 3896ac27a0ecSDave Kleikamp 3897617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 3898ac27a0ecSDave Kleikamp { 38992c8be6b2SJan Kara /* Are we journaling quotas? */ 3900617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 3901617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 3902ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 3903617ba13bSMingming Cao return ext4_write_dquot(dquot); 3904ac27a0ecSDave Kleikamp } else { 3905ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 3906ac27a0ecSDave Kleikamp } 3907ac27a0ecSDave Kleikamp } 3908ac27a0ecSDave Kleikamp 3909617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 3910ac27a0ecSDave Kleikamp { 3911ac27a0ecSDave Kleikamp int ret, err; 3912ac27a0ecSDave Kleikamp handle_t *handle; 3913ac27a0ecSDave Kleikamp 3914ac27a0ecSDave Kleikamp /* Data block + inode block */ 3915617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 3916ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3917ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3918ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 3919617ba13bSMingming Cao err = ext4_journal_stop(handle); 3920ac27a0ecSDave Kleikamp if (!ret) 3921ac27a0ecSDave Kleikamp ret = err; 3922ac27a0ecSDave Kleikamp return ret; 3923ac27a0ecSDave Kleikamp } 3924ac27a0ecSDave Kleikamp 3925ac27a0ecSDave Kleikamp /* 3926ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 3927ac27a0ecSDave Kleikamp * the quota file and such... 3928ac27a0ecSDave Kleikamp */ 3929617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 3930ac27a0ecSDave Kleikamp { 3931287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 3932617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 3933ac27a0ecSDave Kleikamp } 3934ac27a0ecSDave Kleikamp 3935ac27a0ecSDave Kleikamp /* 3936ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 3937ac27a0ecSDave Kleikamp */ 3938617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 3939307ae18aSChristoph Hellwig char *name) 3940ac27a0ecSDave Kleikamp { 3941ac27a0ecSDave Kleikamp int err; 39428264613dSAl Viro struct path path; 3943ac27a0ecSDave Kleikamp 3944ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 3945ac27a0ecSDave Kleikamp return -EINVAL; 39460623543bSJan Kara 39478264613dSAl Viro err = kern_path(name, LOOKUP_FOLLOW, &path); 3948ac27a0ecSDave Kleikamp if (err) 3949ac27a0ecSDave Kleikamp return err; 39500623543bSJan Kara 3951ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 39528264613dSAl Viro if (path.mnt->mnt_sb != sb) { 39538264613dSAl Viro path_put(&path); 3954ac27a0ecSDave Kleikamp return -EXDEV; 3955ac27a0ecSDave Kleikamp } 39560623543bSJan Kara /* Journaling quota? */ 39570623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 39582b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 39598264613dSAl Viro if (path.dentry->d_parent != sb->s_root) 3960b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3961b31e1552SEric Sandeen "Quota file not on filesystem root. " 3962b31e1552SEric Sandeen "Journaled quota will not work"); 39630623543bSJan Kara } 39640623543bSJan Kara 39650623543bSJan Kara /* 39660623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 39670623543bSJan Kara * all updates to the file when we bypass pagecache... 39680623543bSJan Kara */ 39690390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 39700390131bSFrank Mayhar ext4_should_journal_data(path.dentry->d_inode)) { 39710623543bSJan Kara /* 39720623543bSJan Kara * We don't need to lock updates but journal_flush() could 39730623543bSJan Kara * otherwise be livelocked... 39740623543bSJan Kara */ 39750623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 39767ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 39770623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 39787ffe1ea8SHidehiro Kawai if (err) { 39798264613dSAl Viro path_put(&path); 39807ffe1ea8SHidehiro Kawai return err; 39817ffe1ea8SHidehiro Kawai } 39820623543bSJan Kara } 39830623543bSJan Kara 3984287a8095SChristoph Hellwig err = dquot_quota_on_path(sb, type, format_id, &path); 39858264613dSAl Viro path_put(&path); 398677e69dacSAl Viro return err; 3987ac27a0ecSDave Kleikamp } 3988ac27a0ecSDave Kleikamp 3989ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 3990ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 3991ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 3992ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 3993617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 3994ac27a0ecSDave Kleikamp size_t len, loff_t off) 3995ac27a0ecSDave Kleikamp { 3996ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3997725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3998ac27a0ecSDave Kleikamp int err = 0; 3999ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4000ac27a0ecSDave Kleikamp int tocopy; 4001ac27a0ecSDave Kleikamp size_t toread; 4002ac27a0ecSDave Kleikamp struct buffer_head *bh; 4003ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 4004ac27a0ecSDave Kleikamp 4005ac27a0ecSDave Kleikamp if (off > i_size) 4006ac27a0ecSDave Kleikamp return 0; 4007ac27a0ecSDave Kleikamp if (off+len > i_size) 4008ac27a0ecSDave Kleikamp len = i_size-off; 4009ac27a0ecSDave Kleikamp toread = len; 4010ac27a0ecSDave Kleikamp while (toread > 0) { 4011ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 4012ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 4013617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 4014ac27a0ecSDave Kleikamp if (err) 4015ac27a0ecSDave Kleikamp return err; 4016ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 4017ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 4018ac27a0ecSDave Kleikamp else 4019ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 4020ac27a0ecSDave Kleikamp brelse(bh); 4021ac27a0ecSDave Kleikamp offset = 0; 4022ac27a0ecSDave Kleikamp toread -= tocopy; 4023ac27a0ecSDave Kleikamp data += tocopy; 4024ac27a0ecSDave Kleikamp blk++; 4025ac27a0ecSDave Kleikamp } 4026ac27a0ecSDave Kleikamp return len; 4027ac27a0ecSDave Kleikamp } 4028ac27a0ecSDave Kleikamp 4029ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 4030ac27a0ecSDave Kleikamp * enough credits) */ 4031617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 4032ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 4033ac27a0ecSDave Kleikamp { 4034ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4035725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4036ac27a0ecSDave Kleikamp int err = 0; 4037ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4038617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 4039ac27a0ecSDave Kleikamp struct buffer_head *bh; 4040ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 4041ac27a0ecSDave Kleikamp 40420390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 4043b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4044b31e1552SEric Sandeen " cancelled because transaction is not started", 40459c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 40469c3013e9SJan Kara return -EIO; 40479c3013e9SJan Kara } 404867eeb568SDmitry Monakhov /* 404967eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 405067eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 405167eeb568SDmitry Monakhov */ 405267eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 405367eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 405467eeb568SDmitry Monakhov " cancelled because not block aligned", 405567eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 405667eeb568SDmitry Monakhov return -EIO; 405767eeb568SDmitry Monakhov } 405867eeb568SDmitry Monakhov 4059ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 4060617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 4061ac27a0ecSDave Kleikamp if (!bh) 4062ac27a0ecSDave Kleikamp goto out; 4063ac27a0ecSDave Kleikamp if (journal_quota) { 4064617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 4065ac27a0ecSDave Kleikamp if (err) { 4066ac27a0ecSDave Kleikamp brelse(bh); 4067ac27a0ecSDave Kleikamp goto out; 4068ac27a0ecSDave Kleikamp } 4069ac27a0ecSDave Kleikamp } 4070ac27a0ecSDave Kleikamp lock_buffer(bh); 407167eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 4072ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 4073ac27a0ecSDave Kleikamp unlock_buffer(bh); 4074ac27a0ecSDave Kleikamp if (journal_quota) 40750390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 4076ac27a0ecSDave Kleikamp else { 4077ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 4078678aaf48SJan Kara err = ext4_jbd2_file_inode(handle, inode); 4079ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 4080ac27a0ecSDave Kleikamp } 4081ac27a0ecSDave Kleikamp brelse(bh); 4082ac27a0ecSDave Kleikamp out: 408367eeb568SDmitry Monakhov if (err) { 40844d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 4085ac27a0ecSDave Kleikamp return err; 40864d04e4fbSJan Kara } 408767eeb568SDmitry Monakhov if (inode->i_size < off + len) { 408867eeb568SDmitry Monakhov i_size_write(inode, off + len); 4089617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 4090ac27a0ecSDave Kleikamp } 4091ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 4092617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 4093ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 409467eeb568SDmitry Monakhov return len; 4095ac27a0ecSDave Kleikamp } 4096ac27a0ecSDave Kleikamp 4097ac27a0ecSDave Kleikamp #endif 4098ac27a0ecSDave Kleikamp 40990b8e58a1SAndreas Dilger static int ext4_get_sb(struct file_system_type *fs_type, int flags, 41000b8e58a1SAndreas Dilger const char *dev_name, void *data, struct vfsmount *mnt) 4101ac27a0ecSDave Kleikamp { 4102617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); 4103ac27a0ecSDave Kleikamp } 4104ac27a0ecSDave Kleikamp 410537f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 410624b58424STheodore Ts'o static struct file_system_type ext2_fs_type = { 410724b58424STheodore Ts'o .owner = THIS_MODULE, 410824b58424STheodore Ts'o .name = "ext2", 410924b58424STheodore Ts'o .get_sb = ext4_get_sb, 411024b58424STheodore Ts'o .kill_sb = kill_block_super, 411124b58424STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 411224b58424STheodore Ts'o }; 411324b58424STheodore Ts'o 411424b58424STheodore Ts'o static inline void register_as_ext2(void) 411524b58424STheodore Ts'o { 411624b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 411724b58424STheodore Ts'o if (err) 411824b58424STheodore Ts'o printk(KERN_WARNING 411924b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 412024b58424STheodore Ts'o } 412124b58424STheodore Ts'o 412224b58424STheodore Ts'o static inline void unregister_as_ext2(void) 412324b58424STheodore Ts'o { 412424b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 412524b58424STheodore Ts'o } 412651b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 412724b58424STheodore Ts'o #else 412824b58424STheodore Ts'o static inline void register_as_ext2(void) { } 412924b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 413024b58424STheodore Ts'o #endif 413124b58424STheodore Ts'o 413237f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 413324b58424STheodore Ts'o static inline void register_as_ext3(void) 413424b58424STheodore Ts'o { 413524b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 413624b58424STheodore Ts'o if (err) 413724b58424STheodore Ts'o printk(KERN_WARNING 413824b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 413924b58424STheodore Ts'o } 414024b58424STheodore Ts'o 414124b58424STheodore Ts'o static inline void unregister_as_ext3(void) 414224b58424STheodore Ts'o { 414324b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 414424b58424STheodore Ts'o } 414551b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 414624b58424STheodore Ts'o #else 414724b58424STheodore Ts'o static inline void register_as_ext3(void) { } 414824b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 414924b58424STheodore Ts'o #endif 415024b58424STheodore Ts'o 415103010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 4152ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 415303010a33STheodore Ts'o .name = "ext4", 4154617ba13bSMingming Cao .get_sb = ext4_get_sb, 4155ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 4156ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 4157ac27a0ecSDave Kleikamp }; 4158ac27a0ecSDave Kleikamp 4159617ba13bSMingming Cao static int __init init_ext4_fs(void) 4160ac27a0ecSDave Kleikamp { 4161c9de560dSAlex Tomas int err; 4162c9de560dSAlex Tomas 416312e9b892SDmitry Monakhov ext4_check_flag_values(); 41646fd058f7STheodore Ts'o err = init_ext4_system_zone(); 41656fd058f7STheodore Ts'o if (err) 41666fd058f7STheodore Ts'o return err; 41673197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 41683197ebdbSTheodore Ts'o if (!ext4_kset) 41696fd058f7STheodore Ts'o goto out4; 41709f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 4171c9de560dSAlex Tomas err = init_ext4_mballoc(); 4172ac27a0ecSDave Kleikamp if (err) 41736fd058f7STheodore Ts'o goto out3; 4174c9de560dSAlex Tomas 4175c9de560dSAlex Tomas err = init_ext4_xattr(); 4176c9de560dSAlex Tomas if (err) 4177c9de560dSAlex Tomas goto out2; 4178ac27a0ecSDave Kleikamp err = init_inodecache(); 4179ac27a0ecSDave Kleikamp if (err) 4180ac27a0ecSDave Kleikamp goto out1; 418124b58424STheodore Ts'o register_as_ext2(); 418224b58424STheodore Ts'o register_as_ext3(); 418303010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 4184ac27a0ecSDave Kleikamp if (err) 4185ac27a0ecSDave Kleikamp goto out; 4186ac27a0ecSDave Kleikamp return 0; 4187ac27a0ecSDave Kleikamp out: 418824b58424STheodore Ts'o unregister_as_ext2(); 418924b58424STheodore Ts'o unregister_as_ext3(); 4190ac27a0ecSDave Kleikamp destroy_inodecache(); 4191ac27a0ecSDave Kleikamp out1: 4192617ba13bSMingming Cao exit_ext4_xattr(); 4193c9de560dSAlex Tomas out2: 4194c9de560dSAlex Tomas exit_ext4_mballoc(); 41956fd058f7STheodore Ts'o out3: 41966fd058f7STheodore Ts'o remove_proc_entry("fs/ext4", NULL); 41976fd058f7STheodore Ts'o kset_unregister(ext4_kset); 41986fd058f7STheodore Ts'o out4: 41996fd058f7STheodore Ts'o exit_ext4_system_zone(); 4200ac27a0ecSDave Kleikamp return err; 4201ac27a0ecSDave Kleikamp } 4202ac27a0ecSDave Kleikamp 4203617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 4204ac27a0ecSDave Kleikamp { 420524b58424STheodore Ts'o unregister_as_ext2(); 420624b58424STheodore Ts'o unregister_as_ext3(); 420703010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 4208ac27a0ecSDave Kleikamp destroy_inodecache(); 4209617ba13bSMingming Cao exit_ext4_xattr(); 4210c9de560dSAlex Tomas exit_ext4_mballoc(); 42119f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 42123197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 42136fd058f7STheodore Ts'o exit_ext4_system_zone(); 4214ac27a0ecSDave Kleikamp } 4215ac27a0ecSDave Kleikamp 4216ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 421783982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 4218ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 4219617ba13bSMingming Cao module_init(init_ext4_fs) 4220617ba13bSMingming Cao module_exit(exit_ext4_fs) 4221