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)) { 2510b8e58a1SAndreas Dilger ext4_abort(sb, __func__, "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 */ 265617ba13bSMingming Cao int __ext4_journal_stop(const char *where, 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) 282617ba13bSMingming Cao __ext4_std_error(sb, where, err); 283ac27a0ecSDave Kleikamp return err; 284ac27a0ecSDave Kleikamp } 285ac27a0ecSDave Kleikamp 286617ba13bSMingming Cao void ext4_journal_abort_handle(const char *caller, const char *err_fn, 287ac27a0ecSDave Kleikamp struct buffer_head *bh, handle_t *handle, int err) 288ac27a0ecSDave Kleikamp { 289ac27a0ecSDave Kleikamp char nbuf[16]; 290617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 291ac27a0ecSDave Kleikamp 2920390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 2930390131bSFrank Mayhar 294ac27a0ecSDave Kleikamp if (bh) 295ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 296ac27a0ecSDave Kleikamp 297ac27a0ecSDave Kleikamp if (!handle->h_err) 298ac27a0ecSDave Kleikamp handle->h_err = err; 299ac27a0ecSDave Kleikamp 300ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 301ac27a0ecSDave Kleikamp return; 302ac27a0ecSDave Kleikamp 303ac27a0ecSDave Kleikamp printk(KERN_ERR "%s: aborting transaction: %s in %s\n", 304ac27a0ecSDave Kleikamp caller, errstr, err_fn); 305ac27a0ecSDave Kleikamp 306dab291afSMingming Cao jbd2_journal_abort_handle(handle); 307ac27a0ecSDave Kleikamp } 308ac27a0ecSDave Kleikamp 309ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 310ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 311ac27a0ecSDave Kleikamp * 312ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 313617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 314ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 315ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 316ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 317ac27a0ecSDave Kleikamp * write out the superblock safely. 318ac27a0ecSDave Kleikamp * 319dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 320d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 321ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 322ac27a0ecSDave Kleikamp */ 323ac27a0ecSDave Kleikamp 324617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 325ac27a0ecSDave Kleikamp { 326617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 327ac27a0ecSDave Kleikamp 328617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 329617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 330ac27a0ecSDave Kleikamp 331ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 332ac27a0ecSDave Kleikamp return; 333ac27a0ecSDave Kleikamp 334ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 335617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 336ac27a0ecSDave Kleikamp 3374ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 338ac27a0ecSDave Kleikamp if (journal) 339dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 340ac27a0ecSDave Kleikamp } 341ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 342b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 343ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 344ac27a0ecSDave Kleikamp } 345e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 346ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 347617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 348ac27a0ecSDave Kleikamp sb->s_id); 349ac27a0ecSDave Kleikamp } 350ac27a0ecSDave Kleikamp 35112062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 352ac27a0ecSDave Kleikamp const char *fmt, ...) 353ac27a0ecSDave Kleikamp { 354ac27a0ecSDave Kleikamp va_list args; 355ac27a0ecSDave Kleikamp 356ac27a0ecSDave Kleikamp va_start(args, fmt); 357617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 358ac27a0ecSDave Kleikamp vprintk(fmt, args); 359ac27a0ecSDave Kleikamp printk("\n"); 360ac27a0ecSDave Kleikamp va_end(args); 361ac27a0ecSDave Kleikamp 362617ba13bSMingming Cao ext4_handle_error(sb); 363ac27a0ecSDave Kleikamp } 364ac27a0ecSDave Kleikamp 365273df556SFrank Mayhar void ext4_error_inode(const char *function, struct inode *inode, 366273df556SFrank Mayhar const char *fmt, ...) 367273df556SFrank Mayhar { 368273df556SFrank Mayhar va_list args; 369273df556SFrank Mayhar 370273df556SFrank Mayhar va_start(args, fmt); 371273df556SFrank Mayhar printk(KERN_CRIT "EXT4-fs error (device %s): %s: inode #%lu: (comm %s) ", 372273df556SFrank Mayhar inode->i_sb->s_id, function, inode->i_ino, current->comm); 373273df556SFrank Mayhar vprintk(fmt, args); 374273df556SFrank Mayhar printk("\n"); 375273df556SFrank Mayhar va_end(args); 376273df556SFrank Mayhar 377273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 378273df556SFrank Mayhar } 379273df556SFrank Mayhar 380273df556SFrank Mayhar void ext4_error_file(const char *function, struct file *file, 381273df556SFrank Mayhar const char *fmt, ...) 382273df556SFrank Mayhar { 383273df556SFrank Mayhar va_list args; 384273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 385273df556SFrank Mayhar char pathname[80], *path; 386273df556SFrank Mayhar 387273df556SFrank Mayhar va_start(args, fmt); 388273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 389273df556SFrank Mayhar if (!path) 390273df556SFrank Mayhar path = "(unknown)"; 391273df556SFrank Mayhar printk(KERN_CRIT 392273df556SFrank Mayhar "EXT4-fs error (device %s): %s: inode #%lu (comm %s path %s): ", 393273df556SFrank Mayhar inode->i_sb->s_id, function, inode->i_ino, current->comm, path); 394273df556SFrank Mayhar vprintk(fmt, args); 395273df556SFrank Mayhar printk("\n"); 396273df556SFrank Mayhar va_end(args); 397273df556SFrank Mayhar 398273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 399273df556SFrank Mayhar } 400273df556SFrank Mayhar 401617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 402ac27a0ecSDave Kleikamp char nbuf[16]) 403ac27a0ecSDave Kleikamp { 404ac27a0ecSDave Kleikamp char *errstr = NULL; 405ac27a0ecSDave Kleikamp 406ac27a0ecSDave Kleikamp switch (errno) { 407ac27a0ecSDave Kleikamp case -EIO: 408ac27a0ecSDave Kleikamp errstr = "IO failure"; 409ac27a0ecSDave Kleikamp break; 410ac27a0ecSDave Kleikamp case -ENOMEM: 411ac27a0ecSDave Kleikamp errstr = "Out of memory"; 412ac27a0ecSDave Kleikamp break; 413ac27a0ecSDave Kleikamp case -EROFS: 41478f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 41578f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 416ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 417ac27a0ecSDave Kleikamp else 418ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 419ac27a0ecSDave Kleikamp break; 420ac27a0ecSDave Kleikamp default: 421ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 422ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 423ac27a0ecSDave Kleikamp * NULL. */ 424ac27a0ecSDave Kleikamp if (nbuf) { 425ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 426ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 427ac27a0ecSDave Kleikamp errstr = nbuf; 428ac27a0ecSDave Kleikamp } 429ac27a0ecSDave Kleikamp break; 430ac27a0ecSDave Kleikamp } 431ac27a0ecSDave Kleikamp 432ac27a0ecSDave Kleikamp return errstr; 433ac27a0ecSDave Kleikamp } 434ac27a0ecSDave Kleikamp 435617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 436ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 437ac27a0ecSDave Kleikamp 4382b2d6d01STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, int errno) 439ac27a0ecSDave Kleikamp { 440ac27a0ecSDave Kleikamp char nbuf[16]; 441ac27a0ecSDave Kleikamp const char *errstr; 442ac27a0ecSDave Kleikamp 443ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 444ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 445ac27a0ecSDave Kleikamp * an error. */ 446ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 447ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 448ac27a0ecSDave Kleikamp return; 449ac27a0ecSDave Kleikamp 450617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 451617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", 452ac27a0ecSDave Kleikamp sb->s_id, function, errstr); 453ac27a0ecSDave Kleikamp 454617ba13bSMingming Cao ext4_handle_error(sb); 455ac27a0ecSDave Kleikamp } 456ac27a0ecSDave Kleikamp 457ac27a0ecSDave Kleikamp /* 458617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 459ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 460ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 461ac27a0ecSDave Kleikamp * 462ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 463ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 464ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 465ac27a0ecSDave Kleikamp */ 466ac27a0ecSDave Kleikamp 467617ba13bSMingming Cao void ext4_abort(struct super_block *sb, const char *function, 468ac27a0ecSDave Kleikamp const char *fmt, ...) 469ac27a0ecSDave Kleikamp { 470ac27a0ecSDave Kleikamp va_list args; 471ac27a0ecSDave Kleikamp 472ac27a0ecSDave Kleikamp va_start(args, fmt); 473617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 474ac27a0ecSDave Kleikamp vprintk(fmt, args); 475ac27a0ecSDave Kleikamp printk("\n"); 476ac27a0ecSDave Kleikamp va_end(args); 477ac27a0ecSDave Kleikamp 478ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 479617ba13bSMingming Cao panic("EXT4-fs panic from previous error\n"); 480ac27a0ecSDave Kleikamp 481ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 482ac27a0ecSDave Kleikamp return; 483ac27a0ecSDave Kleikamp 484b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 485617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 486ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4874ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 488ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 489dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 490ac27a0ecSDave Kleikamp } 491ac27a0ecSDave Kleikamp 492b31e1552SEric Sandeen void ext4_msg (struct super_block * sb, const char *prefix, 493b31e1552SEric Sandeen const char *fmt, ...) 494b31e1552SEric Sandeen { 495b31e1552SEric Sandeen va_list args; 496b31e1552SEric Sandeen 497b31e1552SEric Sandeen va_start(args, fmt); 498b31e1552SEric Sandeen printk("%sEXT4-fs (%s): ", prefix, sb->s_id); 499b31e1552SEric Sandeen vprintk(fmt, args); 500b31e1552SEric Sandeen printk("\n"); 501b31e1552SEric Sandeen va_end(args); 502b31e1552SEric Sandeen } 503b31e1552SEric Sandeen 50412062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 505ac27a0ecSDave Kleikamp const char *fmt, ...) 506ac27a0ecSDave Kleikamp { 507ac27a0ecSDave Kleikamp va_list args; 508ac27a0ecSDave Kleikamp 509ac27a0ecSDave Kleikamp va_start(args, fmt); 510617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", 511ac27a0ecSDave Kleikamp sb->s_id, function); 512ac27a0ecSDave Kleikamp vprintk(fmt, args); 513ac27a0ecSDave Kleikamp printk("\n"); 514ac27a0ecSDave Kleikamp va_end(args); 515ac27a0ecSDave Kleikamp } 516ac27a0ecSDave Kleikamp 5175d1b1b3fSAneesh Kumar K.V void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, 5185d1b1b3fSAneesh Kumar K.V const char *function, const char *fmt, ...) 5195d1b1b3fSAneesh Kumar K.V __releases(bitlock) 5205d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 5215d1b1b3fSAneesh Kumar K.V { 5225d1b1b3fSAneesh Kumar K.V va_list args; 5235d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 5245d1b1b3fSAneesh Kumar K.V 5255d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 5265d1b1b3fSAneesh Kumar K.V printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 5275d1b1b3fSAneesh Kumar K.V vprintk(fmt, args); 5285d1b1b3fSAneesh Kumar K.V printk("\n"); 5295d1b1b3fSAneesh Kumar K.V va_end(args); 5305d1b1b3fSAneesh Kumar K.V 5315d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 5325d1b1b3fSAneesh Kumar K.V EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 5335d1b1b3fSAneesh Kumar K.V es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 534e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 5355d1b1b3fSAneesh Kumar K.V return; 5365d1b1b3fSAneesh Kumar K.V } 5375d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 5385d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 5395d1b1b3fSAneesh Kumar K.V /* 5405d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 5415d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 5425d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 5435d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 5445d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 5455d1b1b3fSAneesh Kumar K.V * ext4_grp_locked_error() to distinguish beween the 5465d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 5475d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 5485d1b1b3fSAneesh Kumar K.V * more appropriate error code. 5495d1b1b3fSAneesh Kumar K.V */ 5505d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 5515d1b1b3fSAneesh Kumar K.V return; 5525d1b1b3fSAneesh Kumar K.V } 5535d1b1b3fSAneesh Kumar K.V 554617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 555ac27a0ecSDave Kleikamp { 556617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 557ac27a0ecSDave Kleikamp 558617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 559ac27a0ecSDave Kleikamp return; 560ac27a0ecSDave Kleikamp 56112062dddSEric Sandeen ext4_warning(sb, 562ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 563ac27a0ecSDave Kleikamp "running e2fsck is recommended", 564617ba13bSMingming Cao EXT4_DYNAMIC_REV); 565ac27a0ecSDave Kleikamp 566617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 567617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 568617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 569ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 570ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 571ac27a0ecSDave Kleikamp 572ac27a0ecSDave Kleikamp /* 573ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 574ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 575ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 576ac27a0ecSDave Kleikamp */ 577ac27a0ecSDave Kleikamp } 578ac27a0ecSDave Kleikamp 579ac27a0ecSDave Kleikamp /* 580ac27a0ecSDave Kleikamp * Open the external journal device 581ac27a0ecSDave Kleikamp */ 582b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 583ac27a0ecSDave Kleikamp { 584ac27a0ecSDave Kleikamp struct block_device *bdev; 585ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 586ac27a0ecSDave Kleikamp 587ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 588ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 589ac27a0ecSDave Kleikamp goto fail; 590ac27a0ecSDave Kleikamp return bdev; 591ac27a0ecSDave Kleikamp 592ac27a0ecSDave Kleikamp fail: 593b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 594ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 595ac27a0ecSDave Kleikamp return NULL; 596ac27a0ecSDave Kleikamp } 597ac27a0ecSDave Kleikamp 598ac27a0ecSDave Kleikamp /* 599ac27a0ecSDave Kleikamp * Release the journal device 600ac27a0ecSDave Kleikamp */ 601617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 602ac27a0ecSDave Kleikamp { 603ac27a0ecSDave Kleikamp bd_release(bdev); 6049a1c3542SAl Viro return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 605ac27a0ecSDave Kleikamp } 606ac27a0ecSDave Kleikamp 607617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 608ac27a0ecSDave Kleikamp { 609ac27a0ecSDave Kleikamp struct block_device *bdev; 610ac27a0ecSDave Kleikamp int ret = -ENODEV; 611ac27a0ecSDave Kleikamp 612ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 613ac27a0ecSDave Kleikamp if (bdev) { 614617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 615ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 616ac27a0ecSDave Kleikamp } 617ac27a0ecSDave Kleikamp return ret; 618ac27a0ecSDave Kleikamp } 619ac27a0ecSDave Kleikamp 620ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 621ac27a0ecSDave Kleikamp { 622617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 623ac27a0ecSDave Kleikamp } 624ac27a0ecSDave Kleikamp 625617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 626ac27a0ecSDave Kleikamp { 627ac27a0ecSDave Kleikamp struct list_head *l; 628ac27a0ecSDave Kleikamp 629b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 630ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 631ac27a0ecSDave Kleikamp 632ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 633ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 634ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 635ac27a0ecSDave Kleikamp printk(KERN_ERR " " 636ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 637ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 638ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 639ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 640ac27a0ecSDave Kleikamp } 641ac27a0ecSDave Kleikamp } 642ac27a0ecSDave Kleikamp 643617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 644ac27a0ecSDave Kleikamp { 645617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 646617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 647ef2cabf7SHidehiro Kawai int i, err; 648ac27a0ecSDave Kleikamp 649e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 650e0ccfd95SChristoph Hellwig 6514c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 6524c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 6534c0425ffSMingming Cao 654a9e220f8SAl Viro lock_super(sb); 6556cfd0148SChristoph Hellwig lock_kernel(); 6568c85e125SChristoph Hellwig if (sb->s_dirt) 657ebc1ac16SChristoph Hellwig ext4_commit_super(sb, 1); 6588c85e125SChristoph Hellwig 6590390131bSFrank Mayhar if (sbi->s_journal) { 660ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 66147b4a50bSJan Kara sbi->s_journal = NULL; 662ef2cabf7SHidehiro Kawai if (err < 0) 6630390131bSFrank Mayhar ext4_abort(sb, __func__, 6640390131bSFrank Mayhar "Couldn't clean up the journal"); 6650390131bSFrank Mayhar } 666d4edac31SJosef Bacik 667d4edac31SJosef Bacik ext4_release_system_zone(sb); 668d4edac31SJosef Bacik ext4_mb_release(sb); 669d4edac31SJosef Bacik ext4_ext_release(sb); 670d4edac31SJosef Bacik ext4_xattr_put_super(sb); 671d4edac31SJosef Bacik 672ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 673617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 674ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 675e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 676ac27a0ecSDave Kleikamp } 677240799cdSTheodore Ts'o if (sbi->s_proc) { 6789f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 679240799cdSTheodore Ts'o } 6803197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 681ac27a0ecSDave Kleikamp 682ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 683ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 684ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 685c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 686c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 687c5ca7c76STheodore Ts'o else 688772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 689ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 690ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 691ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 6926bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 693ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 694ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 695ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 696ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 697ac27a0ecSDave Kleikamp #endif 698ac27a0ecSDave Kleikamp 699ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 700ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 701ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 702ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 703ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 704ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 705ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 706ac27a0ecSDave Kleikamp 707f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 708ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 709ac27a0ecSDave Kleikamp /* 710ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 711ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 712ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 713ac27a0ecSDave Kleikamp */ 714ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 715f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 716617ba13bSMingming Cao ext4_blkdev_remove(sbi); 717ac27a0ecSDave Kleikamp } 718ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 7193197ebdbSTheodore Ts'o /* 7203197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 7213197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 7223197ebdbSTheodore Ts'o */ 7233197ebdbSTheodore Ts'o unlock_kernel(); 7243197ebdbSTheodore Ts'o unlock_super(sb); 7253197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 7263197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 727705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 728ac27a0ecSDave Kleikamp kfree(sbi); 729ac27a0ecSDave Kleikamp } 730ac27a0ecSDave Kleikamp 731e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 732ac27a0ecSDave Kleikamp 733ac27a0ecSDave Kleikamp /* 734ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 735ac27a0ecSDave Kleikamp */ 736617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 737ac27a0ecSDave Kleikamp { 738617ba13bSMingming Cao struct ext4_inode_info *ei; 739ac27a0ecSDave Kleikamp 740e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 741ac27a0ecSDave Kleikamp if (!ei) 742ac27a0ecSDave Kleikamp return NULL; 7430b8e58a1SAndreas Dilger 744ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 74591246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 746a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 747c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 748c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 7490390131bSFrank Mayhar /* 7500390131bSFrank Mayhar * Note: We can be called before EXT4_SB(sb)->s_journal is set, 7510390131bSFrank Mayhar * therefore it can be null here. Don't check it, just initialize 7520390131bSFrank Mayhar * jinode. 7530390131bSFrank Mayhar */ 754678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 755d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 756d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 757d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 7589d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 759d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 760d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 761a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 762a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 763a9e7f447SDmitry Monakhov #endif 764c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 765744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 7668d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 767b436b9beSJan Kara ei->i_sync_tid = 0; 768b436b9beSJan Kara ei->i_datasync_tid = 0; 7690b8e58a1SAndreas Dilger 770ac27a0ecSDave Kleikamp return &ei->vfs_inode; 771ac27a0ecSDave Kleikamp } 772ac27a0ecSDave Kleikamp 773617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 774ac27a0ecSDave Kleikamp { 7759f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 776b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 777b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 778b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 7799f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 7809f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 7819f7dd93dSVasily Averin true); 7829f7dd93dSVasily Averin dump_stack(); 7839f7dd93dSVasily Averin } 784617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 785ac27a0ecSDave Kleikamp } 786ac27a0ecSDave Kleikamp 78751cc5068SAlexey Dobriyan static void init_once(void *foo) 788ac27a0ecSDave Kleikamp { 789617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 790ac27a0ecSDave Kleikamp 791ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 79203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 793ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 794ac27a0ecSDave Kleikamp #endif 7950e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 796ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 797ac27a0ecSDave Kleikamp } 798ac27a0ecSDave Kleikamp 799ac27a0ecSDave Kleikamp static int init_inodecache(void) 800ac27a0ecSDave Kleikamp { 801617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 802617ba13bSMingming Cao sizeof(struct ext4_inode_info), 803ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 804ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 80520c2df83SPaul Mundt init_once); 806617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 807ac27a0ecSDave Kleikamp return -ENOMEM; 808ac27a0ecSDave Kleikamp return 0; 809ac27a0ecSDave Kleikamp } 810ac27a0ecSDave Kleikamp 811ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 812ac27a0ecSDave Kleikamp { 813617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 814ac27a0ecSDave Kleikamp } 815ac27a0ecSDave Kleikamp 816*0930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 817ac27a0ecSDave Kleikamp { 818*0930fcc1SAl Viro invalidate_inode_buffers(inode); 819*0930fcc1SAl Viro end_writeback(inode); 8209f754758SChristoph Hellwig dquot_drop(inode); 821c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 8220390131bSFrank Mayhar if (EXT4_JOURNAL(inode)) 823678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 824678aaf48SJan Kara &EXT4_I(inode)->jinode); 825ac27a0ecSDave Kleikamp } 826ac27a0ecSDave Kleikamp 8272b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 8282b2d6d01STheodore Ts'o struct super_block *sb) 829ac27a0ecSDave Kleikamp { 830ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 831617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 832ac27a0ecSDave Kleikamp 8335a20bdfcSJan Kara if (sbi->s_jquota_fmt) { 8345a20bdfcSJan Kara char *fmtname = ""; 8355a20bdfcSJan Kara 8365a20bdfcSJan Kara switch (sbi->s_jquota_fmt) { 8375a20bdfcSJan Kara case QFMT_VFS_OLD: 8385a20bdfcSJan Kara fmtname = "vfsold"; 8395a20bdfcSJan Kara break; 8405a20bdfcSJan Kara case QFMT_VFS_V0: 8415a20bdfcSJan Kara fmtname = "vfsv0"; 8425a20bdfcSJan Kara break; 8435a20bdfcSJan Kara case QFMT_VFS_V1: 8445a20bdfcSJan Kara fmtname = "vfsv1"; 8455a20bdfcSJan Kara break; 8465a20bdfcSJan Kara } 8475a20bdfcSJan Kara seq_printf(seq, ",jqfmt=%s", fmtname); 8485a20bdfcSJan Kara } 849ac27a0ecSDave Kleikamp 850ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 851ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 852ac27a0ecSDave Kleikamp 853ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 854ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 855ac27a0ecSDave Kleikamp 856482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA)) 857ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 858ac27a0ecSDave Kleikamp 859482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA)) 860ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 861ac27a0ecSDave Kleikamp #endif 862ac27a0ecSDave Kleikamp } 863ac27a0ecSDave Kleikamp 864d9c9bef1SMiklos Szeredi /* 865d9c9bef1SMiklos Szeredi * Show an option if 866d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 867d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 868d9c9bef1SMiklos Szeredi */ 869617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 870ac27a0ecSDave Kleikamp { 871aa22df2cSAneesh Kumar K.V int def_errors; 872aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 873ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 874d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 875d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 876d9c9bef1SMiklos Szeredi 877d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 878aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 879d9c9bef1SMiklos Szeredi 880d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 881d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 882d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 883d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 884aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 885d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 886d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 887d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 888d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 889d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 890d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 891d9c9bef1SMiklos Szeredi } 892d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 893d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 894d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 895d9c9bef1SMiklos Szeredi } 896bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 897d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 898bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 899d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 900bb4f397aSAneesh Kumar K.V } 901bb4f397aSAneesh Kumar K.V } 902aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 903bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 904aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 905d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 906aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 907d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 908aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 909d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 910d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 911d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 91203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 913aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 914aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 915d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 916d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 917d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 918d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 919d9c9bef1SMiklos Szeredi } 920d9c9bef1SMiklos Szeredi #endif 92103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 922aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 923d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 924d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 925d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 926d9c9bef1SMiklos Szeredi #endif 92730773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 928d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 929d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 930d9c9bef1SMiklos Szeredi } 93130773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 93230773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 93330773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 93430773840STheodore Ts'o } 93530773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 93630773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 93730773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 93830773840STheodore Ts'o } 93930773840STheodore Ts'o 940571640caSEric Sandeen /* 941571640caSEric Sandeen * We're changing the default of barrier mount option, so 942571640caSEric Sandeen * let's always display its mount state so it's clear what its 943571640caSEric Sandeen * status is. 944571640caSEric Sandeen */ 945571640caSEric Sandeen seq_puts(seq, ",barrier="); 946571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 947cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 948cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 94939a4badeSJan Kara else if (test_opt(sb, JOURNAL_CHECKSUM)) 95039a4badeSJan Kara seq_puts(seq, ",journal_checksum"); 951d9c9bef1SMiklos Szeredi if (test_opt(sb, NOBH)) 952d9c9bef1SMiklos Szeredi seq_puts(seq, ",nobh"); 95325ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 95425ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 955dd919b98SAneesh Kumar K.V if (!test_opt(sb, DELALLOC)) 956dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 957dd919b98SAneesh Kumar K.V 958ac27a0ecSDave Kleikamp 959cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 960cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 961aa22df2cSAneesh Kumar K.V /* 962aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 963aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 964aa22df2cSAneesh Kumar K.V */ 965617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 966ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 967617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 968ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 969617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 970ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 971ac27a0ecSDave Kleikamp 972240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 973240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 974240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 975240799cdSTheodore Ts'o 9765bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 9775bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 9785bf5683aSHidehiro Kawai 979afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 98006705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 981afd4672dSTheodore Ts'o 9825328e635SEric Sandeen if (test_opt(sb, DISCARD)) 9835328e635SEric Sandeen seq_puts(seq, ",discard"); 9845328e635SEric Sandeen 985e3bb52aeSEric Sandeen if (test_opt(sb, NOLOAD)) 986e3bb52aeSEric Sandeen seq_puts(seq, ",norecovery"); 987e3bb52aeSEric Sandeen 988744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) 989744692dcSJiaying Zhang seq_puts(seq, ",dioread_nolock"); 990744692dcSJiaying Zhang 991617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 9920b8e58a1SAndreas Dilger 993ac27a0ecSDave Kleikamp return 0; 994ac27a0ecSDave Kleikamp } 995ac27a0ecSDave Kleikamp 9961b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 9971b961ac0SChristoph Hellwig u64 ino, u32 generation) 998ac27a0ecSDave Kleikamp { 999ac27a0ecSDave Kleikamp struct inode *inode; 1000ac27a0ecSDave Kleikamp 1001617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1002ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1003617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1004ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1005ac27a0ecSDave Kleikamp 1006ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1007ac27a0ecSDave Kleikamp * 1008617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1009ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1010ac27a0ecSDave Kleikamp * 1011ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1012ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1013ac27a0ecSDave Kleikamp */ 10141d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 10151d1fe1eeSDavid Howells if (IS_ERR(inode)) 10161d1fe1eeSDavid Howells return ERR_CAST(inode); 10171d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1018ac27a0ecSDave Kleikamp iput(inode); 1019ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1020ac27a0ecSDave Kleikamp } 10211b961ac0SChristoph Hellwig 10221b961ac0SChristoph Hellwig return inode; 1023ac27a0ecSDave Kleikamp } 10241b961ac0SChristoph Hellwig 10251b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10261b961ac0SChristoph Hellwig int fh_len, int fh_type) 10271b961ac0SChristoph Hellwig { 10281b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10291b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10301b961ac0SChristoph Hellwig } 10311b961ac0SChristoph Hellwig 10321b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10331b961ac0SChristoph Hellwig int fh_len, int fh_type) 10341b961ac0SChristoph Hellwig { 10351b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10361b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1037ac27a0ecSDave Kleikamp } 1038ac27a0ecSDave Kleikamp 1039c39a7f84SToshiyuki Okajima /* 1040c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1041c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1042c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1043c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1044c39a7f84SToshiyuki Okajima */ 10450b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10460b8e58a1SAndreas Dilger gfp_t wait) 1047c39a7f84SToshiyuki Okajima { 1048c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1049c39a7f84SToshiyuki Okajima 1050c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1051c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1052c39a7f84SToshiyuki Okajima return 0; 1053c39a7f84SToshiyuki Okajima if (journal) 1054c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1055c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1056c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1057c39a7f84SToshiyuki Okajima } 1058c39a7f84SToshiyuki Okajima 1059ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1060ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1061ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1062ac27a0ecSDave Kleikamp 1063617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1064617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1065617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1066617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1067617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 10686f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1069307ae18aSChristoph Hellwig char *path); 1070617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1071617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1072ac27a0ecSDave Kleikamp size_t len, loff_t off); 1073617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1074ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1075ac27a0ecSDave Kleikamp 107661e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 1077a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 107860e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1079a9e7f447SDmitry Monakhov #endif 1080617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1081617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1082617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1083617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1084a5b5ee32SJan Kara .write_info = ext4_write_info, 1085a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1086a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1087ac27a0ecSDave Kleikamp }; 1088ac27a0ecSDave Kleikamp 10890d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1090617ba13bSMingming Cao .quota_on = ext4_quota_on, 1091287a8095SChristoph Hellwig .quota_off = dquot_quota_off, 1092287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1093287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1094287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1095287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1096287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1097ac27a0ecSDave Kleikamp }; 1098ac27a0ecSDave Kleikamp #endif 1099ac27a0ecSDave Kleikamp 1100ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1101617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1102617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1103617ba13bSMingming Cao .write_inode = ext4_write_inode, 1104617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 1105*0930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1106617ba13bSMingming Cao .put_super = ext4_put_super, 1107617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1108c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1109c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1110617ba13bSMingming Cao .statfs = ext4_statfs, 1111617ba13bSMingming Cao .remount_fs = ext4_remount, 1112617ba13bSMingming Cao .show_options = ext4_show_options, 1113ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1114617ba13bSMingming Cao .quota_read = ext4_quota_read, 1115617ba13bSMingming Cao .quota_write = ext4_quota_write, 1116ac27a0ecSDave Kleikamp #endif 1117c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1118ac27a0ecSDave Kleikamp }; 1119ac27a0ecSDave Kleikamp 11209ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 11219ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 11229ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 11239ca92389STheodore Ts'o .write_inode = ext4_write_inode, 11249ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 1125*0930fcc1SAl Viro .evict_inode = ext4_evict_inode, 11269ca92389STheodore Ts'o .write_super = ext4_write_super, 11279ca92389STheodore Ts'o .put_super = ext4_put_super, 11289ca92389STheodore Ts'o .statfs = ext4_statfs, 11299ca92389STheodore Ts'o .remount_fs = ext4_remount, 11309ca92389STheodore Ts'o .show_options = ext4_show_options, 11319ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 11329ca92389STheodore Ts'o .quota_read = ext4_quota_read, 11339ca92389STheodore Ts'o .quota_write = ext4_quota_write, 11349ca92389STheodore Ts'o #endif 11359ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 11369ca92389STheodore Ts'o }; 11379ca92389STheodore Ts'o 113839655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11391b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11401b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1141617ba13bSMingming Cao .get_parent = ext4_get_parent, 1142ac27a0ecSDave Kleikamp }; 1143ac27a0ecSDave Kleikamp 1144ac27a0ecSDave Kleikamp enum { 1145ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1146ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 114701436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1148ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 114906705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 115030773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1151c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1152818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1153ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1154296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1155ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11565a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 11575a20bdfcSJan Kara Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, 11585a20bdfcSJan Kara Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, 115901436ef2STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, 11606fd058f7STheodore Ts'o Opt_block_validity, Opt_noblock_validity, 11615328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1162744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 11635328e635SEric Sandeen Opt_discard, Opt_nodiscard, 1164ac27a0ecSDave Kleikamp }; 1165ac27a0ecSDave Kleikamp 1166a447c093SSteven Whitehouse static const match_table_t tokens = { 1167ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1168ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1169ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1170ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1171ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1172ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1173ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1174ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1175ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1176ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1177ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1178ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1179ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1180ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1181ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1182ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1183ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1184ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1185ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1186ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1187ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1188e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 1189ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1190ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1191ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 119230773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 119330773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1194ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1195ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1196818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1197818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1198ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1199ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1200ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1201ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12025bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12035bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1204ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1205ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1206ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1207ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1208ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1209ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12105a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1211ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1212ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1213ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1214ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1215ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 121606705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 121706705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 121825ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1219c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1220ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 122164769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1222dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 12236fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12246fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1225240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1226b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1227afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 122806705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 122906705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1230744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1231744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12325328e635SEric Sandeen {Opt_discard, "discard"}, 12335328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1234f3f12faaSJosef Bacik {Opt_err, NULL}, 1235ac27a0ecSDave Kleikamp }; 1236ac27a0ecSDave Kleikamp 1237617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1238ac27a0ecSDave Kleikamp { 1239617ba13bSMingming Cao ext4_fsblk_t sb_block; 1240ac27a0ecSDave Kleikamp char *options = (char *) *data; 1241ac27a0ecSDave Kleikamp 1242ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1243ac27a0ecSDave Kleikamp return 1; /* Default location */ 12440b8e58a1SAndreas Dilger 1245ac27a0ecSDave Kleikamp options += 3; 12460b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1247ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1248ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12494776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1250ac27a0ecSDave Kleikamp (char *) *data); 1251ac27a0ecSDave Kleikamp return 1; 1252ac27a0ecSDave Kleikamp } 1253ac27a0ecSDave Kleikamp if (*options == ',') 1254ac27a0ecSDave Kleikamp options++; 1255ac27a0ecSDave Kleikamp *data = (void *) options; 12560b8e58a1SAndreas Dilger 1257ac27a0ecSDave Kleikamp return sb_block; 1258ac27a0ecSDave Kleikamp } 1259ac27a0ecSDave Kleikamp 1260b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1261437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1262437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1263b3881f74STheodore Ts'o 126456c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 126556c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 126656c50f11SDmitry Monakhov { 126756c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 126856c50f11SDmitry Monakhov char *qname; 126956c50f11SDmitry Monakhov 127056c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 127156c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 127256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 127356c50f11SDmitry Monakhov "Cannot change journaled " 127456c50f11SDmitry Monakhov "quota options when quota turned on"); 127556c50f11SDmitry Monakhov return 0; 127656c50f11SDmitry Monakhov } 127756c50f11SDmitry Monakhov qname = match_strdup(args); 127856c50f11SDmitry Monakhov if (!qname) { 127956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 128056c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 128156c50f11SDmitry Monakhov return 0; 128256c50f11SDmitry Monakhov } 128356c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 128456c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 128556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 128656c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 128756c50f11SDmitry Monakhov kfree(qname); 128856c50f11SDmitry Monakhov return 0; 128956c50f11SDmitry Monakhov } 129056c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 129156c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 129256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 129356c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 129456c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 129556c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 129656c50f11SDmitry Monakhov return 0; 129756c50f11SDmitry Monakhov } 129856c50f11SDmitry Monakhov set_opt(sbi->s_mount_opt, QUOTA); 129956c50f11SDmitry Monakhov return 1; 130056c50f11SDmitry Monakhov } 130156c50f11SDmitry Monakhov 130256c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 130356c50f11SDmitry Monakhov { 130456c50f11SDmitry Monakhov 130556c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 130656c50f11SDmitry Monakhov 130756c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 130856c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 130956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 131056c50f11SDmitry Monakhov " when quota turned on"); 131156c50f11SDmitry Monakhov return 0; 131256c50f11SDmitry Monakhov } 131356c50f11SDmitry Monakhov /* 131456c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 131556c50f11SDmitry Monakhov * to be correct 131656c50f11SDmitry Monakhov */ 131756c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 131856c50f11SDmitry Monakhov return 1; 131956c50f11SDmitry Monakhov } 132056c50f11SDmitry Monakhov #endif 132156c50f11SDmitry Monakhov 1322ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1323c3191067STheodore Ts'o unsigned long *journal_devnum, 1324b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1325617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1326ac27a0ecSDave Kleikamp { 1327617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1328ac27a0ecSDave Kleikamp char *p; 1329ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1330ac27a0ecSDave Kleikamp int data_opt = 0; 1331ac27a0ecSDave Kleikamp int option; 1332ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 133356c50f11SDmitry Monakhov int qfmt; 1334ac27a0ecSDave Kleikamp #endif 1335ac27a0ecSDave Kleikamp 1336ac27a0ecSDave Kleikamp if (!options) 1337ac27a0ecSDave Kleikamp return 1; 1338ac27a0ecSDave Kleikamp 1339ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1340ac27a0ecSDave Kleikamp int token; 1341ac27a0ecSDave Kleikamp if (!*p) 1342ac27a0ecSDave Kleikamp continue; 1343ac27a0ecSDave Kleikamp 134415121c18SEric Sandeen /* 134515121c18SEric Sandeen * Initialize args struct so we know whether arg was 134615121c18SEric Sandeen * found; some options take optional arguments. 134715121c18SEric Sandeen */ 134815121c18SEric Sandeen args[0].to = args[0].from = 0; 1349ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1350ac27a0ecSDave Kleikamp switch (token) { 1351ac27a0ecSDave Kleikamp case Opt_bsd_df: 1352437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1353ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, MINIX_DF); 1354ac27a0ecSDave Kleikamp break; 1355ac27a0ecSDave Kleikamp case Opt_minix_df: 1356437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1357ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, MINIX_DF); 1358437ca0fdSDmitry Monakhov 1359ac27a0ecSDave Kleikamp break; 1360ac27a0ecSDave Kleikamp case Opt_grpid: 1361437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1362ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1363437ca0fdSDmitry Monakhov 1364ac27a0ecSDave Kleikamp break; 1365ac27a0ecSDave Kleikamp case Opt_nogrpid: 1366437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1367ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPID); 1368437ca0fdSDmitry Monakhov 1369ac27a0ecSDave Kleikamp break; 1370ac27a0ecSDave Kleikamp case Opt_resuid: 1371ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1372ac27a0ecSDave Kleikamp return 0; 1373ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1374ac27a0ecSDave Kleikamp break; 1375ac27a0ecSDave Kleikamp case Opt_resgid: 1376ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1377ac27a0ecSDave Kleikamp return 0; 1378ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1379ac27a0ecSDave Kleikamp break; 1380ac27a0ecSDave Kleikamp case Opt_sb: 1381ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1382ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1383ac27a0ecSDave Kleikamp break; 1384ac27a0ecSDave Kleikamp case Opt_err_panic: 1385ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1386ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1387ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1388ac27a0ecSDave Kleikamp break; 1389ac27a0ecSDave Kleikamp case Opt_err_ro: 1390ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1391ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1392ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1393ac27a0ecSDave Kleikamp break; 1394ac27a0ecSDave Kleikamp case Opt_err_cont: 1395ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1396ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1397ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_CONT); 1398ac27a0ecSDave Kleikamp break; 1399ac27a0ecSDave Kleikamp case Opt_nouid32: 1400ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 1401ac27a0ecSDave Kleikamp break; 1402ac27a0ecSDave Kleikamp case Opt_debug: 1403ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1404ac27a0ecSDave Kleikamp break; 1405ac27a0ecSDave Kleikamp case Opt_oldalloc: 1406ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, OLDALLOC); 1407ac27a0ecSDave Kleikamp break; 1408ac27a0ecSDave Kleikamp case Opt_orlov: 1409ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, OLDALLOC); 1410ac27a0ecSDave Kleikamp break; 141103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1412ac27a0ecSDave Kleikamp case Opt_user_xattr: 1413ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 1414ac27a0ecSDave Kleikamp break; 1415ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1416ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, XATTR_USER); 1417ac27a0ecSDave Kleikamp break; 1418ac27a0ecSDave Kleikamp #else 1419ac27a0ecSDave Kleikamp case Opt_user_xattr: 1420ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1421b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1422ac27a0ecSDave Kleikamp break; 1423ac27a0ecSDave Kleikamp #endif 142403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1425ac27a0ecSDave Kleikamp case Opt_acl: 1426ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1427ac27a0ecSDave Kleikamp break; 1428ac27a0ecSDave Kleikamp case Opt_noacl: 1429ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1430ac27a0ecSDave Kleikamp break; 1431ac27a0ecSDave Kleikamp #else 1432ac27a0ecSDave Kleikamp case Opt_acl: 1433ac27a0ecSDave Kleikamp case Opt_noacl: 1434b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1435ac27a0ecSDave Kleikamp break; 1436ac27a0ecSDave Kleikamp #endif 1437ac27a0ecSDave Kleikamp case Opt_journal_update: 1438ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1439ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1440ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1441ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1442ac27a0ecSDave Kleikamp journal file. */ 1443ac27a0ecSDave Kleikamp if (is_remount) { 1444b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1445b31e1552SEric Sandeen "Cannot specify journal on remount"); 1446ac27a0ecSDave Kleikamp return 0; 1447ac27a0ecSDave Kleikamp } 1448ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); 1449ac27a0ecSDave Kleikamp break; 1450ac27a0ecSDave Kleikamp case Opt_journal_dev: 1451ac27a0ecSDave Kleikamp if (is_remount) { 1452b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1453b31e1552SEric Sandeen "Cannot specify journal on remount"); 1454ac27a0ecSDave Kleikamp return 0; 1455ac27a0ecSDave Kleikamp } 1456ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1457ac27a0ecSDave Kleikamp return 0; 1458ac27a0ecSDave Kleikamp *journal_devnum = option; 1459ac27a0ecSDave Kleikamp break; 1460818d276cSGirish Shilamkar case Opt_journal_checksum: 1461d4da6c9cSLinus Torvalds set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1462d4da6c9cSLinus Torvalds break; 1463818d276cSGirish Shilamkar case Opt_journal_async_commit: 1464818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1465d4da6c9cSLinus Torvalds set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1466818d276cSGirish Shilamkar break; 1467ac27a0ecSDave Kleikamp case Opt_noload: 1468ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOLOAD); 1469ac27a0ecSDave Kleikamp break; 1470ac27a0ecSDave Kleikamp case Opt_commit: 1471ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1472ac27a0ecSDave Kleikamp return 0; 1473ac27a0ecSDave Kleikamp if (option < 0) 1474ac27a0ecSDave Kleikamp return 0; 1475ac27a0ecSDave Kleikamp if (option == 0) 1476cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1477ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1478ac27a0ecSDave Kleikamp break; 147930773840STheodore Ts'o case Opt_max_batch_time: 148030773840STheodore Ts'o if (match_int(&args[0], &option)) 148130773840STheodore Ts'o return 0; 148230773840STheodore Ts'o if (option < 0) 148330773840STheodore Ts'o return 0; 148430773840STheodore Ts'o if (option == 0) 148530773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 148630773840STheodore Ts'o sbi->s_max_batch_time = option; 148730773840STheodore Ts'o break; 148830773840STheodore Ts'o case Opt_min_batch_time: 148930773840STheodore Ts'o if (match_int(&args[0], &option)) 149030773840STheodore Ts'o return 0; 149130773840STheodore Ts'o if (option < 0) 149230773840STheodore Ts'o return 0; 149330773840STheodore Ts'o sbi->s_min_batch_time = option; 149430773840STheodore Ts'o break; 1495ac27a0ecSDave Kleikamp case Opt_data_journal: 1496617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1497ac27a0ecSDave Kleikamp goto datacheck; 1498ac27a0ecSDave Kleikamp case Opt_data_ordered: 1499617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1500ac27a0ecSDave Kleikamp goto datacheck; 1501ac27a0ecSDave Kleikamp case Opt_data_writeback: 1502617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1503ac27a0ecSDave Kleikamp datacheck: 1504ac27a0ecSDave Kleikamp if (is_remount) { 1505482a7425SDmitry Monakhov if (test_opt(sb, DATA_FLAGS) != data_opt) { 1506b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1507b31e1552SEric Sandeen "Cannot change data mode on remount"); 1508ac27a0ecSDave Kleikamp return 0; 1509ac27a0ecSDave Kleikamp } 1510ac27a0ecSDave Kleikamp } else { 1511482a7425SDmitry Monakhov clear_opt(sbi->s_mount_opt, DATA_FLAGS); 1512ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1513ac27a0ecSDave Kleikamp } 1514ac27a0ecSDave Kleikamp break; 15155bf5683aSHidehiro Kawai case Opt_data_err_abort: 15165bf5683aSHidehiro Kawai set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 15175bf5683aSHidehiro Kawai break; 15185bf5683aSHidehiro Kawai case Opt_data_err_ignore: 15195bf5683aSHidehiro Kawai clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 15205bf5683aSHidehiro Kawai break; 1521ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1522ac27a0ecSDave Kleikamp case Opt_usrjquota: 152356c50f11SDmitry Monakhov if (!set_qf_name(sb, USRQUOTA, &args[0])) 152456c50f11SDmitry Monakhov return 0; 152556c50f11SDmitry Monakhov break; 1526ac27a0ecSDave Kleikamp case Opt_grpjquota: 152756c50f11SDmitry Monakhov if (!set_qf_name(sb, GRPQUOTA, &args[0])) 1528ac27a0ecSDave Kleikamp return 0; 1529ac27a0ecSDave Kleikamp break; 1530ac27a0ecSDave Kleikamp case Opt_offusrjquota: 153156c50f11SDmitry Monakhov if (!clear_qf_name(sb, USRQUOTA)) 1532ac27a0ecSDave Kleikamp return 0; 1533ac27a0ecSDave Kleikamp break; 153456c50f11SDmitry Monakhov case Opt_offgrpjquota: 153556c50f11SDmitry Monakhov if (!clear_qf_name(sb, GRPQUOTA)) 153656c50f11SDmitry Monakhov return 0; 153756c50f11SDmitry Monakhov break; 153856c50f11SDmitry Monakhov 1539ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1540dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1541dfc5d03fSJan Kara goto set_qf_format; 1542ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1543dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 15445a20bdfcSJan Kara goto set_qf_format; 15455a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 15465a20bdfcSJan Kara qfmt = QFMT_VFS_V1; 1547dfc5d03fSJan Kara set_qf_format: 154817bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1549dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1550b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1551dfc5d03fSJan Kara "journaled quota options when " 1552b31e1552SEric Sandeen "quota turned on"); 1553dfc5d03fSJan Kara return 0; 1554dfc5d03fSJan Kara } 1555dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1556ac27a0ecSDave Kleikamp break; 1557ac27a0ecSDave Kleikamp case Opt_quota: 1558ac27a0ecSDave Kleikamp case Opt_usrquota: 1559ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1560ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1561ac27a0ecSDave Kleikamp break; 1562ac27a0ecSDave Kleikamp case Opt_grpquota: 1563ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1564ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1565ac27a0ecSDave Kleikamp break; 1566ac27a0ecSDave Kleikamp case Opt_noquota: 156717bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1568b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1569b31e1552SEric Sandeen "options when quota turned on"); 1570ac27a0ecSDave Kleikamp return 0; 1571ac27a0ecSDave Kleikamp } 1572ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1573ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1574ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1575ac27a0ecSDave Kleikamp break; 1576ac27a0ecSDave Kleikamp #else 1577ac27a0ecSDave Kleikamp case Opt_quota: 1578ac27a0ecSDave Kleikamp case Opt_usrquota: 1579ac27a0ecSDave Kleikamp case Opt_grpquota: 1580b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1581b31e1552SEric Sandeen "quota options not supported"); 1582cd59e7b9SJan Kara break; 1583ac27a0ecSDave Kleikamp case Opt_usrjquota: 1584ac27a0ecSDave Kleikamp case Opt_grpjquota: 1585ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1586ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1587ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1588ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 15895a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 1590b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1591b31e1552SEric Sandeen "journaled quota options not supported"); 1592ac27a0ecSDave Kleikamp break; 1593ac27a0ecSDave Kleikamp case Opt_noquota: 1594ac27a0ecSDave Kleikamp break; 1595ac27a0ecSDave Kleikamp #endif 1596ac27a0ecSDave Kleikamp case Opt_abort: 15974ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1598ac27a0ecSDave Kleikamp break; 159906705bffSTheodore Ts'o case Opt_nobarrier: 160006705bffSTheodore Ts'o clear_opt(sbi->s_mount_opt, BARRIER); 160106705bffSTheodore Ts'o break; 1602ac27a0ecSDave Kleikamp case Opt_barrier: 160315121c18SEric Sandeen if (args[0].from) { 160415121c18SEric Sandeen if (match_int(&args[0], &option)) 160515121c18SEric Sandeen return 0; 160615121c18SEric Sandeen } else 160715121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1608ac27a0ecSDave Kleikamp if (option) 1609ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1610ac27a0ecSDave Kleikamp else 1611ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1612ac27a0ecSDave Kleikamp break; 1613ac27a0ecSDave Kleikamp case Opt_ignore: 1614ac27a0ecSDave Kleikamp break; 1615ac27a0ecSDave Kleikamp case Opt_resize: 1616ac27a0ecSDave Kleikamp if (!is_remount) { 1617b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1618b31e1552SEric Sandeen "resize option only available " 1619b31e1552SEric Sandeen "for remount"); 1620ac27a0ecSDave Kleikamp return 0; 1621ac27a0ecSDave Kleikamp } 1622ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1623ac27a0ecSDave Kleikamp return 0; 1624ac27a0ecSDave Kleikamp *n_blocks_count = option; 1625ac27a0ecSDave Kleikamp break; 1626ac27a0ecSDave Kleikamp case Opt_nobh: 1627ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1628ac27a0ecSDave Kleikamp break; 1629ac27a0ecSDave Kleikamp case Opt_bh: 1630ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1631ac27a0ecSDave Kleikamp break; 163225ec56b5SJean Noel Cordenner case Opt_i_version: 163325ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 163425ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 163525ec56b5SJean Noel Cordenner break; 1636dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1637dd919b98SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 1638dd919b98SAneesh Kumar K.V break; 1639c9de560dSAlex Tomas case Opt_stripe: 1640c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1641c9de560dSAlex Tomas return 0; 1642c9de560dSAlex Tomas if (option < 0) 1643c9de560dSAlex Tomas return 0; 1644c9de560dSAlex Tomas sbi->s_stripe = option; 1645c9de560dSAlex Tomas break; 164664769240SAlex Tomas case Opt_delalloc: 164764769240SAlex Tomas set_opt(sbi->s_mount_opt, DELALLOC); 164864769240SAlex Tomas break; 16496fd058f7STheodore Ts'o case Opt_block_validity: 16506fd058f7STheodore Ts'o set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 16516fd058f7STheodore Ts'o break; 16526fd058f7STheodore Ts'o case Opt_noblock_validity: 16536fd058f7STheodore Ts'o clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 16546fd058f7STheodore Ts'o break; 1655240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1656240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1657240799cdSTheodore Ts'o return 0; 1658240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1659240799cdSTheodore Ts'o return 0; 1660f7c43950STheodore Ts'o if (!is_power_of_2(option)) { 1661b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1662b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1663b31e1552SEric Sandeen " must be a power of 2"); 16643197ebdbSTheodore Ts'o return 0; 16653197ebdbSTheodore Ts'o } 1666240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1667240799cdSTheodore Ts'o break; 1668b3881f74STheodore Ts'o case Opt_journal_ioprio: 1669b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1670b3881f74STheodore Ts'o return 0; 1671b3881f74STheodore Ts'o if (option < 0 || option > 7) 1672b3881f74STheodore Ts'o break; 1673b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1674b3881f74STheodore Ts'o option); 1675b3881f74STheodore Ts'o break; 167606705bffSTheodore Ts'o case Opt_noauto_da_alloc: 167706705bffSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 167806705bffSTheodore Ts'o break; 1679afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 168015121c18SEric Sandeen if (args[0].from) { 168115121c18SEric Sandeen if (match_int(&args[0], &option)) 168215121c18SEric Sandeen return 0; 168315121c18SEric Sandeen } else 168415121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1685afd4672dSTheodore Ts'o if (option) 1686afd4672dSTheodore Ts'o clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); 1687afd4672dSTheodore Ts'o else 1688afd4672dSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 1689afd4672dSTheodore Ts'o break; 16905328e635SEric Sandeen case Opt_discard: 16915328e635SEric Sandeen set_opt(sbi->s_mount_opt, DISCARD); 16925328e635SEric Sandeen break; 16935328e635SEric Sandeen case Opt_nodiscard: 16945328e635SEric Sandeen clear_opt(sbi->s_mount_opt, DISCARD); 16955328e635SEric Sandeen break; 1696744692dcSJiaying Zhang case Opt_dioread_nolock: 1697744692dcSJiaying Zhang set_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 1698744692dcSJiaying Zhang break; 1699744692dcSJiaying Zhang case Opt_dioread_lock: 1700744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 1701744692dcSJiaying Zhang break; 1702ac27a0ecSDave Kleikamp default: 1703b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1704b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1705b31e1552SEric Sandeen "or missing value", p); 1706ac27a0ecSDave Kleikamp return 0; 1707ac27a0ecSDave Kleikamp } 1708ac27a0ecSDave Kleikamp } 1709ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1710ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1711482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1712ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1713ac27a0ecSDave Kleikamp 1714482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1715ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1716ac27a0ecSDave Kleikamp 171756c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1718b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1719b31e1552SEric Sandeen "format mixing"); 1720ac27a0ecSDave Kleikamp return 0; 1721ac27a0ecSDave Kleikamp } 1722ac27a0ecSDave Kleikamp 1723ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1724b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1725b31e1552SEric Sandeen "not specified"); 1726ac27a0ecSDave Kleikamp return 0; 1727ac27a0ecSDave Kleikamp } 1728ac27a0ecSDave Kleikamp } else { 1729ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1730b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 17312c8be6b2SJan Kara "specified with no journaling " 1732b31e1552SEric Sandeen "enabled"); 1733ac27a0ecSDave Kleikamp return 0; 1734ac27a0ecSDave Kleikamp } 1735ac27a0ecSDave Kleikamp } 1736ac27a0ecSDave Kleikamp #endif 1737ac27a0ecSDave Kleikamp return 1; 1738ac27a0ecSDave Kleikamp } 1739ac27a0ecSDave Kleikamp 1740617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1741ac27a0ecSDave Kleikamp int read_only) 1742ac27a0ecSDave Kleikamp { 1743617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1744ac27a0ecSDave Kleikamp int res = 0; 1745ac27a0ecSDave Kleikamp 1746617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1747b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1748b31e1552SEric Sandeen "forcing read-only mode"); 1749ac27a0ecSDave Kleikamp res = MS_RDONLY; 1750ac27a0ecSDave Kleikamp } 1751ac27a0ecSDave Kleikamp if (read_only) 1752ac27a0ecSDave Kleikamp return res; 1753617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1754b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1755b31e1552SEric Sandeen "running e2fsck is recommended"); 1756617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1757b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1758b31e1552SEric Sandeen "warning: mounting fs with errors, " 1759b31e1552SEric Sandeen "running e2fsck is recommended"); 1760ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1761ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1762ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1763b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1764b31e1552SEric Sandeen "warning: maximal mount count reached, " 1765b31e1552SEric Sandeen "running e2fsck is recommended"); 1766ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1767ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1768ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1769b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1770b31e1552SEric Sandeen "warning: checktime reached, " 1771b31e1552SEric Sandeen "running e2fsck is recommended"); 17720390131bSFrank Mayhar if (!sbi->s_journal) 1773216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1774ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1775617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1776e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1777ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1778617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 17790390131bSFrank Mayhar if (sbi->s_journal) 1780617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1781ac27a0ecSDave Kleikamp 1782e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1783ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1784a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 17857f4520ccSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x]\n", 1786ac27a0ecSDave Kleikamp sb->s_blocksize, 1787ac27a0ecSDave Kleikamp sbi->s_groups_count, 1788617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1789617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1790ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1791ac27a0ecSDave Kleikamp 1792ac27a0ecSDave Kleikamp return res; 1793ac27a0ecSDave Kleikamp } 1794ac27a0ecSDave Kleikamp 1795772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1796772cb7c8SJose R. Santos { 1797772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1798772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1799772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1800772cb7c8SJose R. Santos ext4_group_t flex_group; 1801772cb7c8SJose R. Santos int groups_per_flex = 0; 1802c5ca7c76STheodore Ts'o size_t size; 1803772cb7c8SJose R. Santos int i; 1804772cb7c8SJose R. Santos 1805503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1806503358aeSTheodore Ts'o groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1807503358aeSTheodore Ts'o 1808503358aeSTheodore Ts'o if (groups_per_flex < 2) { 1809772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1810772cb7c8SJose R. Santos return 1; 1811772cb7c8SJose R. Santos } 1812772cb7c8SJose R. Santos 1813c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1814c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1815d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1816d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1817c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 1818c5ca7c76STheodore Ts'o sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); 1819c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 1820c5ca7c76STheodore Ts'o sbi->s_flex_groups = vmalloc(size); 1821c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) 1822c5ca7c76STheodore Ts'o memset(sbi->s_flex_groups, 0, size); 1823c5ca7c76STheodore Ts'o } 1824772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1825b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory for " 1826b31e1552SEric Sandeen "%u flex groups", flex_group_count); 1827772cb7c8SJose R. Santos goto failed; 1828772cb7c8SJose R. Santos } 1829772cb7c8SJose R. Santos 1830772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 183188b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1832772cb7c8SJose R. Santos 1833772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 18347ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 18357ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 18367ad9bb65STheodore Ts'o atomic_add(ext4_free_blks_count(sb, gdp), 18377ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_blocks); 18387ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 18397ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1840772cb7c8SJose R. Santos } 1841772cb7c8SJose R. Santos 1842772cb7c8SJose R. Santos return 1; 1843772cb7c8SJose R. Santos failed: 1844772cb7c8SJose R. Santos return 0; 1845772cb7c8SJose R. Santos } 1846772cb7c8SJose R. Santos 1847717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1848717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1849717d50e4SAndreas Dilger { 1850717d50e4SAndreas Dilger __u16 crc = 0; 1851717d50e4SAndreas Dilger 1852717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1853717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1854717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1855717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1856717d50e4SAndreas Dilger 1857717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1858717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1859717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1860717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1861717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1862717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1863717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1864717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1865717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1866717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1867717d50e4SAndreas Dilger offset); 1868717d50e4SAndreas Dilger } 1869717d50e4SAndreas Dilger 1870717d50e4SAndreas Dilger return cpu_to_le16(crc); 1871717d50e4SAndreas Dilger } 1872717d50e4SAndreas Dilger 1873717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1874717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1875717d50e4SAndreas Dilger { 1876717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1877717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1878717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1879717d50e4SAndreas Dilger return 0; 1880717d50e4SAndreas Dilger 1881717d50e4SAndreas Dilger return 1; 1882717d50e4SAndreas Dilger } 1883717d50e4SAndreas Dilger 1884ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1885617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1886ac27a0ecSDave Kleikamp { 1887617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1888617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1889617ba13bSMingming Cao ext4_fsblk_t last_block; 1890bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1891bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1892bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1893ce421581SJose R. Santos int flexbg_flag = 0; 1894fd2d4291SAvantika Mathur ext4_group_t i; 1895ac27a0ecSDave Kleikamp 1896ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1897ce421581SJose R. Santos flexbg_flag = 1; 1898ce421581SJose R. Santos 1899617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 1900ac27a0ecSDave Kleikamp 1901197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1902197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1903197cd65aSAkinobu Mita 1904ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1905bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1906ac27a0ecSDave Kleikamp else 1907ac27a0ecSDave Kleikamp last_block = first_block + 1908617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1909ac27a0ecSDave Kleikamp 19108fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 19112b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 1912b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1913a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 1914b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 1915ac27a0ecSDave Kleikamp return 0; 1916ac27a0ecSDave Kleikamp } 19178fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 19182b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 1919b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1920a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 1921b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 1922ac27a0ecSDave Kleikamp return 0; 1923ac27a0ecSDave Kleikamp } 19248fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1925bd81d8eeSLaurent Vivier if (inode_table < first_block || 19262b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 1927b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1928a9df9a49STheodore Ts'o "Inode table for group %u not in group " 1929b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 1930ac27a0ecSDave Kleikamp return 0; 1931ac27a0ecSDave Kleikamp } 1932955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 1933717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1934b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1935b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 1936fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1937fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 19387ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 1939955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1940717d50e4SAndreas Dilger return 0; 1941717d50e4SAndreas Dilger } 19427ee1ec4cSLi Zefan } 1943955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1944ce421581SJose R. Santos if (!flexbg_flag) 1945617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 1946ac27a0ecSDave Kleikamp } 1947ac27a0ecSDave Kleikamp 1948bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1949617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 1950ac27a0ecSDave Kleikamp return 1; 1951ac27a0ecSDave Kleikamp } 1952ac27a0ecSDave Kleikamp 1953617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1954ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1955ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1956ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1957ac27a0ecSDave Kleikamp * 1958ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1959ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1960ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1961ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1962ac27a0ecSDave Kleikamp * 1963ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1964ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1965ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1966617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1967ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1968ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1969ac27a0ecSDave Kleikamp */ 1970617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 1971617ba13bSMingming Cao struct ext4_super_block *es) 1972ac27a0ecSDave Kleikamp { 1973ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1974ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1975ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1976ac27a0ecSDave Kleikamp int i; 1977ac27a0ecSDave Kleikamp #endif 1978ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1979ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1980ac27a0ecSDave Kleikamp return; 1981ac27a0ecSDave Kleikamp } 1982ac27a0ecSDave Kleikamp 1983a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1984b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 1985b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 1986a8f48a95SEric Sandeen return; 1987a8f48a95SEric Sandeen } 1988a8f48a95SEric Sandeen 1989617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1990ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1991ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1992ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1993ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1994ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1995ac27a0ecSDave Kleikamp return; 1996ac27a0ecSDave Kleikamp } 1997ac27a0ecSDave Kleikamp 1998ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1999b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2000ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2001ac27a0ecSDave Kleikamp } 2002ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2003ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2004ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2005ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2006ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2007617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2008617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2009ac27a0ecSDave Kleikamp if (ret < 0) 2010b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2011b31e1552SEric Sandeen "Cannot turn on journaled " 2012b31e1552SEric Sandeen "quota: error %d", ret); 2013ac27a0ecSDave Kleikamp } 2014ac27a0ecSDave Kleikamp } 2015ac27a0ecSDave Kleikamp #endif 2016ac27a0ecSDave Kleikamp 2017ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2018ac27a0ecSDave Kleikamp struct inode *inode; 2019ac27a0ecSDave Kleikamp 202097bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 202197bd42b9SJosef Bacik if (IS_ERR(inode)) { 2022ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2023ac27a0ecSDave Kleikamp break; 2024ac27a0ecSDave Kleikamp } 2025ac27a0ecSDave Kleikamp 2026617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2027871a2931SChristoph Hellwig dquot_initialize(inode); 2028ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2029b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2030b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 203146e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2032e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2033ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2034617ba13bSMingming Cao ext4_truncate(inode); 2035ac27a0ecSDave Kleikamp nr_truncates++; 2036ac27a0ecSDave Kleikamp } else { 2037b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2038b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 203946e665e9SHarvey Harrison __func__, inode->i_ino); 2040ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2041ac27a0ecSDave Kleikamp inode->i_ino); 2042ac27a0ecSDave Kleikamp nr_orphans++; 2043ac27a0ecSDave Kleikamp } 2044ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2045ac27a0ecSDave Kleikamp } 2046ac27a0ecSDave Kleikamp 2047ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2048ac27a0ecSDave Kleikamp 2049ac27a0ecSDave Kleikamp if (nr_orphans) 2050b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2051b31e1552SEric Sandeen PLURAL(nr_orphans)); 2052ac27a0ecSDave Kleikamp if (nr_truncates) 2053b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2054b31e1552SEric Sandeen PLURAL(nr_truncates)); 2055ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2056ac27a0ecSDave Kleikamp /* Turn quotas off */ 2057ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2058ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2059287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2060ac27a0ecSDave Kleikamp } 2061ac27a0ecSDave Kleikamp #endif 2062ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2063ac27a0ecSDave Kleikamp } 20640b8e58a1SAndreas Dilger 2065cd2291a4SEric Sandeen /* 2066cd2291a4SEric Sandeen * Maximal extent format file size. 2067cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2068cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2069cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2070cd2291a4SEric Sandeen * so that won't be a limiting factor. 2071cd2291a4SEric Sandeen * 2072cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2073cd2291a4SEric Sandeen */ 2074f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2075cd2291a4SEric Sandeen { 2076cd2291a4SEric Sandeen loff_t res; 2077cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2078cd2291a4SEric Sandeen 2079cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2080f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2081cd2291a4SEric Sandeen /* 208290c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2083cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2084cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2085cd2291a4SEric Sandeen */ 2086cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2087cd2291a4SEric Sandeen 2088cd2291a4SEric Sandeen /* total blocks in file system block size */ 2089cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2090cd2291a4SEric Sandeen upper_limit <<= blkbits; 2091cd2291a4SEric Sandeen } 2092cd2291a4SEric Sandeen 2093cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 2094cd2291a4SEric Sandeen res = 1LL << 32; 2095cd2291a4SEric Sandeen res <<= blkbits; 2096cd2291a4SEric Sandeen res -= 1; 2097cd2291a4SEric Sandeen 2098cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2099cd2291a4SEric Sandeen if (res > upper_limit) 2100cd2291a4SEric Sandeen res = upper_limit; 2101cd2291a4SEric Sandeen 2102cd2291a4SEric Sandeen return res; 2103cd2291a4SEric Sandeen } 2104ac27a0ecSDave Kleikamp 2105ac27a0ecSDave Kleikamp /* 2106cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 21070fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 21080fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2109ac27a0ecSDave Kleikamp */ 2110f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2111ac27a0ecSDave Kleikamp { 2112617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 21130fc1b451SAneesh Kumar K.V int meta_blocks; 21140fc1b451SAneesh Kumar K.V loff_t upper_limit; 21150b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 21160b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 21170b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 21180b8e58a1SAndreas Dilger * 21190b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 21200b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 21210fc1b451SAneesh Kumar K.V */ 21220fc1b451SAneesh Kumar K.V 2123f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 21240fc1b451SAneesh Kumar K.V /* 212590c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 21260b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 21270b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 21280fc1b451SAneesh Kumar K.V */ 21290fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 21300fc1b451SAneesh Kumar K.V 21310fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 21320fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 21330fc1b451SAneesh Kumar K.V 21340fc1b451SAneesh Kumar K.V } else { 21358180a562SAneesh Kumar K.V /* 21368180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 21378180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 21388180a562SAneesh Kumar K.V * represent total number of blocks in 21398180a562SAneesh Kumar K.V * file system block size 21408180a562SAneesh Kumar K.V */ 21410fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 21420fc1b451SAneesh Kumar K.V 21430fc1b451SAneesh Kumar K.V } 21440fc1b451SAneesh Kumar K.V 21450fc1b451SAneesh Kumar K.V /* indirect blocks */ 21460fc1b451SAneesh Kumar K.V meta_blocks = 1; 21470fc1b451SAneesh Kumar K.V /* double indirect blocks */ 21480fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 21490fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 21500fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 21510fc1b451SAneesh Kumar K.V 21520fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 21530fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2154ac27a0ecSDave Kleikamp 2155ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2156ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2157ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2158ac27a0ecSDave Kleikamp res <<= bits; 2159ac27a0ecSDave Kleikamp if (res > upper_limit) 2160ac27a0ecSDave Kleikamp res = upper_limit; 21610fc1b451SAneesh Kumar K.V 21620fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 21630fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 21640fc1b451SAneesh Kumar K.V 2165ac27a0ecSDave Kleikamp return res; 2166ac27a0ecSDave Kleikamp } 2167ac27a0ecSDave Kleikamp 2168617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 216970bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2170ac27a0ecSDave Kleikamp { 2171617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2172fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2173ac27a0ecSDave Kleikamp int has_super = 0; 2174ac27a0ecSDave Kleikamp 2175ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2176ac27a0ecSDave Kleikamp 2177617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2178ac27a0ecSDave Kleikamp nr < first_meta_bg) 217970bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2180ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2181617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2182ac27a0ecSDave Kleikamp has_super = 1; 21830b8e58a1SAndreas Dilger 2184617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2185ac27a0ecSDave Kleikamp } 2186ac27a0ecSDave Kleikamp 2187c9de560dSAlex Tomas /** 2188c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2189c9de560dSAlex Tomas * @sbi: In memory super block info 2190c9de560dSAlex Tomas * 2191c9de560dSAlex Tomas * If we have specified it via mount option, then 2192c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2193c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2194c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2195c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2196c9de560dSAlex Tomas * 2197c9de560dSAlex Tomas */ 2198c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2199c9de560dSAlex Tomas { 2200c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2201c9de560dSAlex Tomas unsigned long stripe_width = 2202c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 2203c9de560dSAlex Tomas 2204c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 2205c9de560dSAlex Tomas return sbi->s_stripe; 2206c9de560dSAlex Tomas 2207c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 2208c9de560dSAlex Tomas return stripe_width; 2209c9de560dSAlex Tomas 2210c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 2211c9de560dSAlex Tomas return stride; 2212c9de560dSAlex Tomas 2213c9de560dSAlex Tomas return 0; 2214c9de560dSAlex Tomas } 2215ac27a0ecSDave Kleikamp 22163197ebdbSTheodore Ts'o /* sysfs supprt */ 22173197ebdbSTheodore Ts'o 22183197ebdbSTheodore Ts'o struct ext4_attr { 22193197ebdbSTheodore Ts'o struct attribute attr; 22203197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 22213197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 22223197ebdbSTheodore Ts'o const char *, size_t); 22233197ebdbSTheodore Ts'o int offset; 22243197ebdbSTheodore Ts'o }; 22253197ebdbSTheodore Ts'o 22263197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 22273197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 22283197ebdbSTheodore Ts'o { 22293197ebdbSTheodore Ts'o char *endp; 22303197ebdbSTheodore Ts'o 2231e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2232e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 22333197ebdbSTheodore Ts'o if (*endp || *value > max) 22343197ebdbSTheodore Ts'o return -EINVAL; 22353197ebdbSTheodore Ts'o 22363197ebdbSTheodore Ts'o return 0; 22373197ebdbSTheodore Ts'o } 22383197ebdbSTheodore Ts'o 22393197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 22403197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 22413197ebdbSTheodore Ts'o char *buf) 22423197ebdbSTheodore Ts'o { 22433197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 22443197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 22453197ebdbSTheodore Ts'o } 22463197ebdbSTheodore Ts'o 22473197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 22483197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 22493197ebdbSTheodore Ts'o { 22503197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 22513197ebdbSTheodore Ts'o 22523197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 22533197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 22543197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 22553197ebdbSTheodore Ts'o } 22563197ebdbSTheodore Ts'o 22573197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 22583197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 22593197ebdbSTheodore Ts'o { 22603197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 22613197ebdbSTheodore Ts'o 22623197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2263a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 22643197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2265a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 22663197ebdbSTheodore Ts'o } 22673197ebdbSTheodore Ts'o 22683197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 22693197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 22703197ebdbSTheodore Ts'o const char *buf, size_t count) 22713197ebdbSTheodore Ts'o { 22723197ebdbSTheodore Ts'o unsigned long t; 22733197ebdbSTheodore Ts'o 22743197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 22753197ebdbSTheodore Ts'o return -EINVAL; 22763197ebdbSTheodore Ts'o 2277f7c43950STheodore Ts'o if (!is_power_of_2(t)) 22783197ebdbSTheodore Ts'o return -EINVAL; 22793197ebdbSTheodore Ts'o 22803197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 22813197ebdbSTheodore Ts'o return count; 22823197ebdbSTheodore Ts'o } 22833197ebdbSTheodore Ts'o 22843197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 22853197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 22863197ebdbSTheodore Ts'o { 22873197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 22883197ebdbSTheodore Ts'o 22893197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 22903197ebdbSTheodore Ts'o } 22913197ebdbSTheodore Ts'o 22923197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 22933197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 22943197ebdbSTheodore Ts'o const char *buf, size_t count) 22953197ebdbSTheodore Ts'o { 22963197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 22973197ebdbSTheodore Ts'o unsigned long t; 22983197ebdbSTheodore Ts'o 22993197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 23003197ebdbSTheodore Ts'o return -EINVAL; 23013197ebdbSTheodore Ts'o *ui = t; 23023197ebdbSTheodore Ts'o return count; 23033197ebdbSTheodore Ts'o } 23043197ebdbSTheodore Ts'o 23053197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 23063197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 23073197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 23083197ebdbSTheodore Ts'o .show = _show, \ 23093197ebdbSTheodore Ts'o .store = _store, \ 23103197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 23113197ebdbSTheodore Ts'o } 23123197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 23133197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 23143197ebdbSTheodore Ts'o 23153197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 23163197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 23173197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 23183197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 23193197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 23203197ebdbSTheodore Ts'o 23213197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 23223197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 23233197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 23243197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 23253197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 232611013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 23273197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 23283197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 23293197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 23303197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 23313197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 23323197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 233355138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 23343197ebdbSTheodore Ts'o 23353197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 23363197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 23373197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 23383197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 23393197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 234011013911SAndreas Dilger ATTR_LIST(inode_goal), 23413197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 23423197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 23433197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 23443197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 23453197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 23463197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 234755138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 23483197ebdbSTheodore Ts'o NULL, 23493197ebdbSTheodore Ts'o }; 23503197ebdbSTheodore Ts'o 23513197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 23523197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 23533197ebdbSTheodore Ts'o { 23543197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 23553197ebdbSTheodore Ts'o s_kobj); 23563197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 23573197ebdbSTheodore Ts'o 23583197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 23593197ebdbSTheodore Ts'o } 23603197ebdbSTheodore Ts'o 23613197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 23623197ebdbSTheodore Ts'o struct attribute *attr, 23633197ebdbSTheodore Ts'o const char *buf, size_t len) 23643197ebdbSTheodore Ts'o { 23653197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 23663197ebdbSTheodore Ts'o s_kobj); 23673197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 23683197ebdbSTheodore Ts'o 23693197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 23703197ebdbSTheodore Ts'o } 23713197ebdbSTheodore Ts'o 23723197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 23733197ebdbSTheodore Ts'o { 23743197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 23753197ebdbSTheodore Ts'o s_kobj); 23763197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 23773197ebdbSTheodore Ts'o } 23783197ebdbSTheodore Ts'o 23793197ebdbSTheodore Ts'o 238052cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 23813197ebdbSTheodore Ts'o .show = ext4_attr_show, 23823197ebdbSTheodore Ts'o .store = ext4_attr_store, 23833197ebdbSTheodore Ts'o }; 23843197ebdbSTheodore Ts'o 23853197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 23863197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 23873197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 23883197ebdbSTheodore Ts'o .release = ext4_sb_release, 23893197ebdbSTheodore Ts'o }; 23903197ebdbSTheodore Ts'o 2391a13fb1a4SEric Sandeen /* 2392a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2393a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2394a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2395a13fb1a4SEric Sandeen * 0 if it cannot be. 2396a13fb1a4SEric Sandeen */ 2397a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2398a13fb1a4SEric Sandeen { 2399a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2400a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2401a13fb1a4SEric Sandeen "Couldn't mount because of " 2402a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2403a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2404a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2405a13fb1a4SEric Sandeen return 0; 2406a13fb1a4SEric Sandeen } 2407a13fb1a4SEric Sandeen 2408a13fb1a4SEric Sandeen if (readonly) 2409a13fb1a4SEric Sandeen return 1; 2410a13fb1a4SEric Sandeen 2411a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2412a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2413a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2414a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2415a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2416a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2417a13fb1a4SEric Sandeen return 0; 2418a13fb1a4SEric Sandeen } 2419a13fb1a4SEric Sandeen /* 2420a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2421a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2422a13fb1a4SEric Sandeen */ 2423a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2424a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2425a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2426a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2427a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2428a13fb1a4SEric Sandeen return 0; 2429a13fb1a4SEric Sandeen } 2430a13fb1a4SEric Sandeen } 2431a13fb1a4SEric Sandeen return 1; 2432a13fb1a4SEric Sandeen } 2433a13fb1a4SEric Sandeen 2434617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 24357477827fSAneesh Kumar K.V __releases(kernel_lock) 24367477827fSAneesh Kumar K.V __acquires(kernel_lock) 2437ac27a0ecSDave Kleikamp { 2438d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 2439ac27a0ecSDave Kleikamp struct buffer_head *bh; 2440617ba13bSMingming Cao struct ext4_super_block *es = NULL; 2441617ba13bSMingming Cao struct ext4_sb_info *sbi; 2442617ba13bSMingming Cao ext4_fsblk_t block; 2443617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 244470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 2445ac27a0ecSDave Kleikamp unsigned long offset = 0; 2446ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 2447ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 2448ac27a0ecSDave Kleikamp struct inode *root; 24499f6200bbSTheodore Ts'o char *cp; 24500390131bSFrank Mayhar const char *descr; 24511d1fe1eeSDavid Howells int ret = -EINVAL; 2452ac27a0ecSDave Kleikamp int blocksize; 24534ec11028STheodore Ts'o unsigned int db_count; 24544ec11028STheodore Ts'o unsigned int i; 2455f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 2456bd81d8eeSLaurent Vivier __u64 blocks_count; 2457833f4077SPeter Zijlstra int err; 2458b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 2459ac27a0ecSDave Kleikamp 2460ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 2461ac27a0ecSDave Kleikamp if (!sbi) 2462ac27a0ecSDave Kleikamp return -ENOMEM; 2463705895b6SPekka Enberg 2464705895b6SPekka Enberg sbi->s_blockgroup_lock = 2465705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 2466705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 2467705895b6SPekka Enberg kfree(sbi); 2468705895b6SPekka Enberg return -ENOMEM; 2469705895b6SPekka Enberg } 2470ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 2471ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 2472617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 2473617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 2474240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 2475d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 2476afc32f7eSTheodore Ts'o sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, 2477afc32f7eSTheodore Ts'o sectors[1]); 2478ac27a0ecSDave Kleikamp 2479ac27a0ecSDave Kleikamp unlock_kernel(); 2480ac27a0ecSDave Kleikamp 24819f6200bbSTheodore Ts'o /* Cleanup superblock name */ 24829f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 24839f6200bbSTheodore Ts'o *cp = '!'; 24849f6200bbSTheodore Ts'o 2485617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 2486ac27a0ecSDave Kleikamp if (!blocksize) { 2487b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 2488ac27a0ecSDave Kleikamp goto out_fail; 2489ac27a0ecSDave Kleikamp } 2490ac27a0ecSDave Kleikamp 2491ac27a0ecSDave Kleikamp /* 2492617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 2493ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 2494ac27a0ecSDave Kleikamp */ 2495617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 249670bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 249770bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 2498ac27a0ecSDave Kleikamp } else { 249970bbb3e0SAndrew Morton logical_sb_block = sb_block; 2500ac27a0ecSDave Kleikamp } 2501ac27a0ecSDave Kleikamp 250270bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 2503b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 2504ac27a0ecSDave Kleikamp goto out_fail; 2505ac27a0ecSDave Kleikamp } 2506ac27a0ecSDave Kleikamp /* 2507ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 2508617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 2509ac27a0ecSDave Kleikamp */ 2510617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2511ac27a0ecSDave Kleikamp sbi->s_es = es; 2512ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 2513617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 2514617ba13bSMingming Cao goto cantfind_ext4; 2515afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 2516ac27a0ecSDave Kleikamp 2517ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 2518ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 2519617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 2520ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 2521437ca0fdSDmitry Monakhov if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { 2522437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", 2523437ca0fdSDmitry Monakhov "2.6.38"); 2524ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 2525437ca0fdSDmitry Monakhov } 2526617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 2527ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 252803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 2529617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 2530ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 25312e7842b8SHugh Dickins #endif 253203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 2533617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 2534ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 25352e7842b8SHugh Dickins #endif 2536617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 2537482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2538617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 2539482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, ORDERED_DATA); 2540617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 2541482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 2542ac27a0ecSDave Kleikamp 2543617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 2544ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 2545bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 2546ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 2547bb4f397aSAneesh Kumar K.V else 2548bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 2549ac27a0ecSDave Kleikamp 2550ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 2551ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 255230773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 255330773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 255430773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 2555ac27a0ecSDave Kleikamp 2556571640caSEric Sandeen set_opt(sbi->s_mount_opt, BARRIER); 2557ac27a0ecSDave Kleikamp 25581e2462f9SMingming Cao /* 2559dd919b98SAneesh Kumar K.V * enable delayed allocation by default 2560dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 2561dd919b98SAneesh Kumar K.V */ 2562ba69f9abSJan Kara if (!IS_EXT3_SB(sb)) 2563dd919b98SAneesh Kumar K.V set_opt(sbi->s_mount_opt, DELALLOC); 2564dd919b98SAneesh Kumar K.V 2565b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 2566b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 2567ac27a0ecSDave Kleikamp goto failed_mount; 2568ac27a0ecSDave Kleikamp 2569ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2570482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 2571ac27a0ecSDave Kleikamp 2572617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 2573617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 2574617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 2575617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 2576b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2577b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 2578b31e1552SEric Sandeen "running e2fsck is recommended"); 2579469108ffSTheodore Tso 2580469108ffSTheodore Tso /* 2581ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 2582ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 2583ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 2584ac27a0ecSDave Kleikamp */ 2585a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 2586ac27a0ecSDave Kleikamp goto failed_mount; 2587a13fb1a4SEric Sandeen 2588ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 2589ac27a0ecSDave Kleikamp 2590617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 2591617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 2592b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2593b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 2594ac27a0ecSDave Kleikamp goto failed_mount; 2595ac27a0ecSDave Kleikamp } 2596ac27a0ecSDave Kleikamp 2597ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 2598ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 2599ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 2600b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 2601ce40733cSAneesh Kumar K.V blocksize); 2602ac27a0ecSDave Kleikamp goto failed_mount; 2603ac27a0ecSDave Kleikamp } 2604ac27a0ecSDave Kleikamp 2605ac27a0ecSDave Kleikamp brelse(bh); 260670bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 260770bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 260870bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 2609ac27a0ecSDave Kleikamp if (!bh) { 2610b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2611b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 2612ac27a0ecSDave Kleikamp goto failed_mount; 2613ac27a0ecSDave Kleikamp } 2614617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 2615ac27a0ecSDave Kleikamp sbi->s_es = es; 2616617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 2617b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2618b31e1552SEric Sandeen "Magic mismatch, very weird!"); 2619ac27a0ecSDave Kleikamp goto failed_mount; 2620ac27a0ecSDave Kleikamp } 2621ac27a0ecSDave Kleikamp } 2622ac27a0ecSDave Kleikamp 2623a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2624a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 2625f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 2626f287a1a5STheodore Ts'o has_huge_files); 2627f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 2628ac27a0ecSDave Kleikamp 2629617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 2630617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 2631617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 2632ac27a0ecSDave Kleikamp } else { 2633ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2634ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2635617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 26361330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2637ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2638b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2639b31e1552SEric Sandeen "unsupported inode size: %d", 2640ac27a0ecSDave Kleikamp sbi->s_inode_size); 2641ac27a0ecSDave Kleikamp goto failed_mount; 2642ac27a0ecSDave Kleikamp } 2643ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2644ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2645ac27a0ecSDave Kleikamp } 26460b8e58a1SAndreas Dilger 26470d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 26480d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 26498fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 26500d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2651d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 2652b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2653b31e1552SEric Sandeen "unsupported descriptor size %lu", 26540d1ee42fSAlexandre Ratchov sbi->s_desc_size); 26550d1ee42fSAlexandre Ratchov goto failed_mount; 26560d1ee42fSAlexandre Ratchov } 26570d1ee42fSAlexandre Ratchov } else 26580d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 26590b8e58a1SAndreas Dilger 2660ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2661ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2662b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2663617ba13bSMingming Cao goto cantfind_ext4; 26640b8e58a1SAndreas Dilger 2665617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2666ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2667617ba13bSMingming Cao goto cantfind_ext4; 2668ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2669ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 26700d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2671ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2672ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2673e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2674e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 26750b8e58a1SAndreas Dilger 2676ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 2677ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2678ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2679f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 2680f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 2681f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2682f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 2683f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 2684f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 2685f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2686f99b2589STheodore Ts'o #else 2687f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 2688f99b2589STheodore Ts'o #endif 2689f99b2589STheodore Ts'o sb->s_dirt = 1; 2690f99b2589STheodore Ts'o } 2691ac27a0ecSDave Kleikamp 2692ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2693b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2694b31e1552SEric Sandeen "#blocks per group too big: %lu", 2695ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2696ac27a0ecSDave Kleikamp goto failed_mount; 2697ac27a0ecSDave Kleikamp } 2698ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2699b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2700b31e1552SEric Sandeen "#inodes per group too big: %lu", 2701ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2702ac27a0ecSDave Kleikamp goto failed_mount; 2703ac27a0ecSDave Kleikamp } 2704ac27a0ecSDave Kleikamp 2705bf43d84bSEric Sandeen /* 2706bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 2707bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 2708bf43d84bSEric Sandeen */ 2709bf43d84bSEric Sandeen if ((ext4_blocks_count(es) > 2710bf43d84bSEric Sandeen (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) || 2711bf43d84bSEric Sandeen (ext4_blocks_count(es) > 2712bf43d84bSEric Sandeen (pgoff_t)(~0ULL) >> (PAGE_CACHE_SHIFT - sb->s_blocksize_bits))) { 2713b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 2714bf43d84bSEric Sandeen " too large to mount safely on this system"); 2715ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 271690c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 2717bf43d84bSEric Sandeen ret = -EFBIG; 2718ac27a0ecSDave Kleikamp goto failed_mount; 2719ac27a0ecSDave Kleikamp } 2720ac27a0ecSDave Kleikamp 2721617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2722617ba13bSMingming Cao goto cantfind_ext4; 2723e7c95593SEric Sandeen 27240f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 27250f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 27260f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 2727b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 2728b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 27290f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 27300f2ddca6SFrom: Thiemo Nagel goto failed_mount; 27310f2ddca6SFrom: Thiemo Nagel } 27320f2ddca6SFrom: Thiemo Nagel 27334ec11028STheodore Ts'o /* 27344ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 27354ec11028STheodore Ts'o * of the filesystem. 27364ec11028STheodore Ts'o */ 27374ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 2738b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 2739b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 2740e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 27414ec11028STheodore Ts'o ext4_blocks_count(es)); 2742e7c95593SEric Sandeen goto failed_mount; 2743e7c95593SEric Sandeen } 2744bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2745bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2746bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2747bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 27484ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 2749b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 27504ec11028STheodore Ts'o "(block count %llu, first data block %u, " 2751b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 27524ec11028STheodore Ts'o ext4_blocks_count(es), 27534ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 27544ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 27554ec11028STheodore Ts'o goto failed_mount; 27564ec11028STheodore Ts'o } 2757bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2758fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 2759fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 2760617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2761617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2762ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 2763ac27a0ecSDave Kleikamp GFP_KERNEL); 2764ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2765b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 2766ac27a0ecSDave Kleikamp goto failed_mount; 2767ac27a0ecSDave Kleikamp } 2768ac27a0ecSDave Kleikamp 27693244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 27709f6200bbSTheodore Ts'o if (ext4_proc_root) 27719f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 27723244fcb1SAlexander Beregalov #endif 2773240799cdSTheodore Ts'o 2774705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 2775ac27a0ecSDave Kleikamp 2776ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 277770bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2778ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2779ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2780b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2781b31e1552SEric Sandeen "can't read group descriptor %d", i); 2782ac27a0ecSDave Kleikamp db_count = i; 2783ac27a0ecSDave Kleikamp goto failed_mount2; 2784ac27a0ecSDave Kleikamp } 2785ac27a0ecSDave Kleikamp } 2786617ba13bSMingming Cao if (!ext4_check_descriptors(sb)) { 2787b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 2788ac27a0ecSDave Kleikamp goto failed_mount2; 2789ac27a0ecSDave Kleikamp } 2790772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2791772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 2792b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2793b31e1552SEric Sandeen "unable to initialize " 2794b31e1552SEric Sandeen "flex_bg meta info!"); 2795772cb7c8SJose R. Santos goto failed_mount2; 2796772cb7c8SJose R. Santos } 2797772cb7c8SJose R. Santos 2798ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2799ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2800ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2801ac27a0ecSDave Kleikamp 2802c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 280355138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 2804c9de560dSAlex Tomas 2805ac27a0ecSDave Kleikamp /* 2806ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2807ac27a0ecSDave Kleikamp */ 28089ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 28099ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 2810617ba13bSMingming Cao sb->s_op = &ext4_sops; 28119ca92389STheodore Ts'o else 28129ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 2813617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2814617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2815ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2816617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2817617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2818ac27a0ecSDave Kleikamp #endif 2819ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 28203b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 282132ed5058STheodore Ts'o mutex_init(&sbi->s_resize_lock); 2822ac27a0ecSDave Kleikamp 2823ac27a0ecSDave Kleikamp sb->s_root = NULL; 2824ac27a0ecSDave Kleikamp 2825ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2826617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2827617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2828ac27a0ecSDave Kleikamp 2829ac27a0ecSDave Kleikamp /* 2830ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2831ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2832ac27a0ecSDave Kleikamp */ 2833ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2834617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2835617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2836ac27a0ecSDave Kleikamp goto failed_mount3; 28370390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 28380390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2839b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 2840b31e1552SEric Sandeen "suppressed and not mounted read-only"); 2841744692dcSJiaying Zhang goto failed_mount_wq; 2842ac27a0ecSDave Kleikamp } else { 28430390131bSFrank Mayhar clear_opt(sbi->s_mount_opt, DATA_FLAGS); 28440390131bSFrank Mayhar set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 28450390131bSFrank Mayhar sbi->s_journal = NULL; 28460390131bSFrank Mayhar needs_recovery = 0; 28470390131bSFrank Mayhar goto no_journal; 2848ac27a0ecSDave Kleikamp } 2849ac27a0ecSDave Kleikamp 2850eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2851eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2852eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2853b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 2854744692dcSJiaying Zhang goto failed_mount_wq; 2855eb40a09cSJose R. Santos } 2856eb40a09cSJose R. Santos 2857d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 2858d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 2859d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2860d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2861d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 2862818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2863818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2864818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2865818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2866d4da6c9cSLinus Torvalds } else { 2867d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 2868d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2869d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2870d4da6c9cSLinus Torvalds } 2871818d276cSGirish Shilamkar 2872ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2873ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2874ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 2875ac27a0ecSDave Kleikamp case 0: 2876ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 287763f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 287863f57933SAndrew Morton * cope, else JOURNAL_DATA 287963f57933SAndrew Morton */ 2880dab291afSMingming Cao if (jbd2_journal_check_available_features 2881dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 2882ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 2883ac27a0ecSDave Kleikamp else 2884ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2885ac27a0ecSDave Kleikamp break; 2886ac27a0ecSDave Kleikamp 2887617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 2888617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 2889dab291afSMingming Cao if (!jbd2_journal_check_available_features 2890dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 2891b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 2892b31e1552SEric Sandeen "requested data journaling mode"); 2893744692dcSJiaying Zhang goto failed_mount_wq; 2894ac27a0ecSDave Kleikamp } 2895ac27a0ecSDave Kleikamp default: 2896ac27a0ecSDave Kleikamp break; 2897ac27a0ecSDave Kleikamp } 2898b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 2899ac27a0ecSDave Kleikamp 29000390131bSFrank Mayhar no_journal: 290184061e07SDmitry Monakhov err = percpu_counter_init(&sbi->s_freeblocks_counter, 290284061e07SDmitry Monakhov ext4_count_free_blocks(sb)); 290384061e07SDmitry Monakhov if (!err) 290484061e07SDmitry Monakhov err = percpu_counter_init(&sbi->s_freeinodes_counter, 290584061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 290684061e07SDmitry Monakhov if (!err) 290784061e07SDmitry Monakhov err = percpu_counter_init(&sbi->s_dirs_counter, 290884061e07SDmitry Monakhov ext4_count_dirs(sb)); 290984061e07SDmitry Monakhov if (!err) 291084061e07SDmitry Monakhov err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 291184061e07SDmitry Monakhov if (err) { 291284061e07SDmitry Monakhov ext4_msg(sb, KERN_ERR, "insufficient memory"); 291384061e07SDmitry Monakhov goto failed_mount_wq; 291484061e07SDmitry Monakhov } 2915ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 2916617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 2917b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring nobh option - " 2918b31e1552SEric Sandeen "its supported only with writeback mode"); 2919ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 2920ac27a0ecSDave Kleikamp } 2921744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) { 2922744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "dioread_nolock option is " 2923744692dcSJiaying Zhang "not supported with nobh mode"); 2924744692dcSJiaying Zhang goto failed_mount_wq; 2925744692dcSJiaying Zhang } 2926ac27a0ecSDave Kleikamp } 29274c0425ffSMingming Cao EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); 29284c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 29294c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 29304c0425ffSMingming Cao goto failed_mount_wq; 29314c0425ffSMingming Cao } 29324c0425ffSMingming Cao 2933ac27a0ecSDave Kleikamp /* 2934dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 2935ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 2936ac27a0ecSDave Kleikamp */ 2937ac27a0ecSDave Kleikamp 29381d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 29391d1fe1eeSDavid Howells if (IS_ERR(root)) { 2940b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 29411d1fe1eeSDavid Howells ret = PTR_ERR(root); 2942ac27a0ecSDave Kleikamp goto failed_mount4; 2943ac27a0ecSDave Kleikamp } 2944ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 29451d1fe1eeSDavid Howells iput(root); 2946b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 2947ac27a0ecSDave Kleikamp goto failed_mount4; 2948ac27a0ecSDave Kleikamp } 29491d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 29501d1fe1eeSDavid Howells if (!sb->s_root) { 2951b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 29521d1fe1eeSDavid Howells iput(root); 29531d1fe1eeSDavid Howells ret = -ENOMEM; 29541d1fe1eeSDavid Howells goto failed_mount4; 29551d1fe1eeSDavid Howells } 2956ac27a0ecSDave Kleikamp 2957617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 2958ef7f3835SKalpak Shah 2959ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 2960ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 2961ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2962ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2963ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 2964ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 2965ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2966ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 2967ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2968ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 2969ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2970ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 2971ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2972ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 2973ef7f3835SKalpak Shah } 2974ef7f3835SKalpak Shah } 2975ef7f3835SKalpak Shah /* Check if enough inode space is available */ 2976ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 2977ef7f3835SKalpak Shah sbi->s_inode_size) { 2978ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2979ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2980b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 2981b31e1552SEric Sandeen "available"); 2982ef7f3835SKalpak Shah } 2983ef7f3835SKalpak Shah 298490576c0bSTheodore Ts'o if (test_opt(sb, DELALLOC) && 298590576c0bSTheodore Ts'o (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 2986b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " 2987b31e1552SEric Sandeen "requested data journaling mode"); 2988c2774d84SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 298990576c0bSTheodore Ts'o } 2990744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) { 2991744692dcSJiaying Zhang if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 2992744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 2993744692dcSJiaying Zhang "option - requested data journaling mode"); 2994744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 2995744692dcSJiaying Zhang } 2996744692dcSJiaying Zhang if (sb->s_blocksize < PAGE_SIZE) { 2997744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 2998744692dcSJiaying Zhang "option - block size is too small"); 2999744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 3000744692dcSJiaying Zhang } 3001744692dcSJiaying Zhang } 3002c2774d84SAneesh Kumar K.V 30036fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 30046fd058f7STheodore Ts'o if (err) { 3005b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3006fbe845ddSCurt Wohlgemuth "zone (%d)", err); 30076fd058f7STheodore Ts'o goto failed_mount4; 30086fd058f7STheodore Ts'o } 30096fd058f7STheodore Ts'o 3010c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 3011c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 3012c2774d84SAneesh Kumar K.V if (err) { 3013b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initalize mballoc (%d)", 3014c2774d84SAneesh Kumar K.V err); 3015c2774d84SAneesh Kumar K.V goto failed_mount4; 3016c2774d84SAneesh Kumar K.V } 3017c2774d84SAneesh Kumar K.V 30183197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 30193197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 30203197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 30213197ebdbSTheodore Ts'o "%s", sb->s_id); 30223197ebdbSTheodore Ts'o if (err) { 30233197ebdbSTheodore Ts'o ext4_mb_release(sb); 30243197ebdbSTheodore Ts'o ext4_ext_release(sb); 30253197ebdbSTheodore Ts'o goto failed_mount4; 30263197ebdbSTheodore Ts'o }; 30273197ebdbSTheodore Ts'o 3028617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3029617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3030617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 30310390131bSFrank Mayhar if (needs_recovery) { 3032b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3033617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 30340390131bSFrank Mayhar } 30350390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 30360390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 30370390131bSFrank Mayhar descr = " journalled data mode"; 30380390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 30390390131bSFrank Mayhar descr = " ordered data mode"; 30400390131bSFrank Mayhar else 30410390131bSFrank Mayhar descr = " writeback data mode"; 30420390131bSFrank Mayhar } else 30430390131bSFrank Mayhar descr = "out journal"; 30440390131bSFrank Mayhar 3045d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 3046d4c402d9SCurt Wohlgemuth "Opts: %s", descr, orig_data); 3047ac27a0ecSDave Kleikamp 3048ac27a0ecSDave Kleikamp lock_kernel(); 3049d4c402d9SCurt Wohlgemuth kfree(orig_data); 3050ac27a0ecSDave Kleikamp return 0; 3051ac27a0ecSDave Kleikamp 3052617ba13bSMingming Cao cantfind_ext4: 3053ac27a0ecSDave Kleikamp if (!silent) 3054b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3055ac27a0ecSDave Kleikamp goto failed_mount; 3056ac27a0ecSDave Kleikamp 3057ac27a0ecSDave Kleikamp failed_mount4: 3058b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 30594c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 30604c0425ffSMingming Cao failed_mount_wq: 30616fd058f7STheodore Ts'o ext4_release_system_zone(sb); 30620390131bSFrank Mayhar if (sbi->s_journal) { 3063dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 306447b4a50bSJan Kara sbi->s_journal = NULL; 30650390131bSFrank Mayhar } 306684061e07SDmitry Monakhov percpu_counter_destroy(&sbi->s_freeblocks_counter); 306784061e07SDmitry Monakhov percpu_counter_destroy(&sbi->s_freeinodes_counter); 306884061e07SDmitry Monakhov percpu_counter_destroy(&sbi->s_dirs_counter); 306984061e07SDmitry Monakhov percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 3070ac27a0ecSDave Kleikamp failed_mount3: 3071c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) { 3072c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 3073c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 3074c5ca7c76STheodore Ts'o else 3075c5ca7c76STheodore Ts'o kfree(sbi->s_flex_groups); 3076c5ca7c76STheodore Ts'o } 3077ac27a0ecSDave Kleikamp failed_mount2: 3078ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 3079ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 3080ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 3081ac27a0ecSDave Kleikamp failed_mount: 3082240799cdSTheodore Ts'o if (sbi->s_proc) { 30839f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 3084240799cdSTheodore Ts'o } 3085ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3086ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3087ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3088ac27a0ecSDave Kleikamp #endif 3089617ba13bSMingming Cao ext4_blkdev_remove(sbi); 3090ac27a0ecSDave Kleikamp brelse(bh); 3091ac27a0ecSDave Kleikamp out_fail: 3092ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 3093f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 3094ac27a0ecSDave Kleikamp kfree(sbi); 3095ac27a0ecSDave Kleikamp lock_kernel(); 3096d4c402d9SCurt Wohlgemuth kfree(orig_data); 30971d1fe1eeSDavid Howells return ret; 3098ac27a0ecSDave Kleikamp } 3099ac27a0ecSDave Kleikamp 3100ac27a0ecSDave Kleikamp /* 3101ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 3102ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 3103ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 3104ac27a0ecSDave Kleikamp */ 3105617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3106ac27a0ecSDave Kleikamp { 3107617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3108ac27a0ecSDave Kleikamp 3109ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 311030773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 311130773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3112ac27a0ecSDave Kleikamp 3113ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 3114ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3115dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3116ac27a0ecSDave Kleikamp else 3117dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 31185bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 31195bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 31205bf5683aSHidehiro Kawai else 31215bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3122ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 3123ac27a0ecSDave Kleikamp } 3124ac27a0ecSDave Kleikamp 3125617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3126ac27a0ecSDave Kleikamp unsigned int journal_inum) 3127ac27a0ecSDave Kleikamp { 3128ac27a0ecSDave Kleikamp struct inode *journal_inode; 3129ac27a0ecSDave Kleikamp journal_t *journal; 3130ac27a0ecSDave Kleikamp 31310390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 31320390131bSFrank Mayhar 3133ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3134ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3135ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3136ac27a0ecSDave Kleikamp 31371d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 31381d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3139b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3140ac27a0ecSDave Kleikamp return NULL; 3141ac27a0ecSDave Kleikamp } 3142ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3143ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3144ac27a0ecSDave Kleikamp iput(journal_inode); 3145b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3146ac27a0ecSDave Kleikamp return NULL; 3147ac27a0ecSDave Kleikamp } 3148ac27a0ecSDave Kleikamp 3149e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3150ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 31511d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3152b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3153ac27a0ecSDave Kleikamp iput(journal_inode); 3154ac27a0ecSDave Kleikamp return NULL; 3155ac27a0ecSDave Kleikamp } 3156ac27a0ecSDave Kleikamp 3157dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3158ac27a0ecSDave Kleikamp if (!journal) { 3159b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3160ac27a0ecSDave Kleikamp iput(journal_inode); 3161ac27a0ecSDave Kleikamp return NULL; 3162ac27a0ecSDave Kleikamp } 3163ac27a0ecSDave Kleikamp journal->j_private = sb; 3164617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3165ac27a0ecSDave Kleikamp return journal; 3166ac27a0ecSDave Kleikamp } 3167ac27a0ecSDave Kleikamp 3168617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3169ac27a0ecSDave Kleikamp dev_t j_dev) 3170ac27a0ecSDave Kleikamp { 3171ac27a0ecSDave Kleikamp struct buffer_head *bh; 3172ac27a0ecSDave Kleikamp journal_t *journal; 3173617ba13bSMingming Cao ext4_fsblk_t start; 3174617ba13bSMingming Cao ext4_fsblk_t len; 3175ac27a0ecSDave Kleikamp int hblock, blocksize; 3176617ba13bSMingming Cao ext4_fsblk_t sb_block; 3177ac27a0ecSDave Kleikamp unsigned long offset; 3178617ba13bSMingming Cao struct ext4_super_block *es; 3179ac27a0ecSDave Kleikamp struct block_device *bdev; 3180ac27a0ecSDave Kleikamp 31810390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 31820390131bSFrank Mayhar 3183b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3184ac27a0ecSDave Kleikamp if (bdev == NULL) 3185ac27a0ecSDave Kleikamp return NULL; 3186ac27a0ecSDave Kleikamp 3187ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 3188b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3189b31e1552SEric Sandeen "failed to claim external journal device"); 31909a1c3542SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 3191ac27a0ecSDave Kleikamp return NULL; 3192ac27a0ecSDave Kleikamp } 3193ac27a0ecSDave Kleikamp 3194ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3195e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3196ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3197b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3198b31e1552SEric Sandeen "blocksize too small for journal device"); 3199ac27a0ecSDave Kleikamp goto out_bdev; 3200ac27a0ecSDave Kleikamp } 3201ac27a0ecSDave Kleikamp 3202617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3203617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3204ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3205ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3206b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3207b31e1552SEric Sandeen "external journal"); 3208ac27a0ecSDave Kleikamp goto out_bdev; 3209ac27a0ecSDave Kleikamp } 3210ac27a0ecSDave Kleikamp 3211617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3212617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3213ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3214617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3215b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3216b31e1552SEric Sandeen "bad superblock"); 3217ac27a0ecSDave Kleikamp brelse(bh); 3218ac27a0ecSDave Kleikamp goto out_bdev; 3219ac27a0ecSDave Kleikamp } 3220ac27a0ecSDave Kleikamp 3221617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3222b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3223ac27a0ecSDave Kleikamp brelse(bh); 3224ac27a0ecSDave Kleikamp goto out_bdev; 3225ac27a0ecSDave Kleikamp } 3226ac27a0ecSDave Kleikamp 3227bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3228ac27a0ecSDave Kleikamp start = sb_block + 1; 3229ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3230ac27a0ecSDave Kleikamp 3231dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3232ac27a0ecSDave Kleikamp start, len, blocksize); 3233ac27a0ecSDave Kleikamp if (!journal) { 3234b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3235ac27a0ecSDave Kleikamp goto out_bdev; 3236ac27a0ecSDave Kleikamp } 3237ac27a0ecSDave Kleikamp journal->j_private = sb; 3238ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3239ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3240ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3241b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3242ac27a0ecSDave Kleikamp goto out_journal; 3243ac27a0ecSDave Kleikamp } 3244ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3245b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3246b31e1552SEric Sandeen "user (unsupported) - %d", 3247ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3248ac27a0ecSDave Kleikamp goto out_journal; 3249ac27a0ecSDave Kleikamp } 3250617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3251617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3252ac27a0ecSDave Kleikamp return journal; 32530b8e58a1SAndreas Dilger 3254ac27a0ecSDave Kleikamp out_journal: 3255dab291afSMingming Cao jbd2_journal_destroy(journal); 3256ac27a0ecSDave Kleikamp out_bdev: 3257617ba13bSMingming Cao ext4_blkdev_put(bdev); 3258ac27a0ecSDave Kleikamp return NULL; 3259ac27a0ecSDave Kleikamp } 3260ac27a0ecSDave Kleikamp 3261617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3262617ba13bSMingming Cao struct ext4_super_block *es, 3263ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3264ac27a0ecSDave Kleikamp { 3265ac27a0ecSDave Kleikamp journal_t *journal; 3266ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3267ac27a0ecSDave Kleikamp dev_t journal_dev; 3268ac27a0ecSDave Kleikamp int err = 0; 3269ac27a0ecSDave Kleikamp int really_read_only; 3270ac27a0ecSDave Kleikamp 32710390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 32720390131bSFrank Mayhar 3273ac27a0ecSDave Kleikamp if (journal_devnum && 3274ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3275b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3276b31e1552SEric Sandeen "numbers have changed"); 3277ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3278ac27a0ecSDave Kleikamp } else 3279ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3280ac27a0ecSDave Kleikamp 3281ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3282ac27a0ecSDave Kleikamp 3283ac27a0ecSDave Kleikamp /* 3284ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3285ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3286ac27a0ecSDave Kleikamp * can get read-write access to the device. 3287ac27a0ecSDave Kleikamp */ 3288617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3289ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3290b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3291b31e1552SEric Sandeen "required on readonly filesystem"); 3292ac27a0ecSDave Kleikamp if (really_read_only) { 3293b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3294b31e1552SEric Sandeen "unavailable, cannot proceed"); 3295ac27a0ecSDave Kleikamp return -EROFS; 3296ac27a0ecSDave Kleikamp } 3297b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 3298b31e1552SEric Sandeen "be enabled during recovery"); 3299ac27a0ecSDave Kleikamp } 3300ac27a0ecSDave Kleikamp } 3301ac27a0ecSDave Kleikamp 3302ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3303b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 3304b31e1552SEric Sandeen "and inode journals!"); 3305ac27a0ecSDave Kleikamp return -EINVAL; 3306ac27a0ecSDave Kleikamp } 3307ac27a0ecSDave Kleikamp 3308ac27a0ecSDave Kleikamp if (journal_inum) { 3309617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3310ac27a0ecSDave Kleikamp return -EINVAL; 3311ac27a0ecSDave Kleikamp } else { 3312617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3313ac27a0ecSDave Kleikamp return -EINVAL; 3314ac27a0ecSDave Kleikamp } 3315ac27a0ecSDave Kleikamp 331690576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 3317b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 33184776004fSTheodore Ts'o 3319ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 3320dab291afSMingming Cao err = jbd2_journal_update_format(journal); 3321ac27a0ecSDave Kleikamp if (err) { 3322b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 3323dab291afSMingming Cao jbd2_journal_destroy(journal); 3324ac27a0ecSDave Kleikamp return err; 3325ac27a0ecSDave Kleikamp } 3326ac27a0ecSDave Kleikamp } 3327ac27a0ecSDave Kleikamp 3328617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3329dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 3330ac27a0ecSDave Kleikamp if (!err) 3331dab291afSMingming Cao err = jbd2_journal_load(journal); 3332ac27a0ecSDave Kleikamp 3333ac27a0ecSDave Kleikamp if (err) { 3334b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 3335dab291afSMingming Cao jbd2_journal_destroy(journal); 3336ac27a0ecSDave Kleikamp return err; 3337ac27a0ecSDave Kleikamp } 3338ac27a0ecSDave Kleikamp 3339617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 3340617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3341ac27a0ecSDave Kleikamp 3342ac27a0ecSDave Kleikamp if (journal_devnum && 3343ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3344ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 3345ac27a0ecSDave Kleikamp 3346ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 3347e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3348ac27a0ecSDave Kleikamp } 3349ac27a0ecSDave Kleikamp 3350ac27a0ecSDave Kleikamp return 0; 3351ac27a0ecSDave Kleikamp } 3352ac27a0ecSDave Kleikamp 3353e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 3354ac27a0ecSDave Kleikamp { 3355e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3356617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 3357c4be0c1dSTakashi Sato int error = 0; 3358ac27a0ecSDave Kleikamp 3359ac27a0ecSDave Kleikamp if (!sbh) 3360c4be0c1dSTakashi Sato return error; 3361914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 3362914258bfSTheodore Ts'o /* 3363914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 3364914258bfSTheodore Ts'o * superblock failed. This could happen because the 3365914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 3366914258bfSTheodore Ts'o * be a transient write error and maybe the block will 3367914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 3368914258bfSTheodore Ts'o * write and hope for the best. 3369914258bfSTheodore Ts'o */ 3370b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 3371b31e1552SEric Sandeen "superblock detected"); 3372914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3373914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3374914258bfSTheodore Ts'o } 337571290b36STheodore Ts'o /* 337671290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 337771290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 337871290b36STheodore Ts'o * write time when we are mounting the root file system 337971290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 338071290b36STheodore Ts'o * for people who are east of GMT and who make their clock 338171290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 338271290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 338371290b36STheodore Ts'o * to complain and force a full file system check. 338471290b36STheodore Ts'o */ 338571290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 3386ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 3387afc32f7eSTheodore Ts'o es->s_kbytes_written = 3388afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 3389afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 3390afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 33915d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 33925d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 33935d1b1b3fSAneesh Kumar K.V es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( 33945d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 33957234ab2aSTheodore Ts'o sb->s_dirt = 0; 3396ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 3397ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 3398914258bfSTheodore Ts'o if (sync) { 3399c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 3400c4be0c1dSTakashi Sato if (error) 3401c4be0c1dSTakashi Sato return error; 3402c4be0c1dSTakashi Sato 3403c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 3404c4be0c1dSTakashi Sato if (error) { 3405b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 3406b31e1552SEric Sandeen "superblock"); 3407914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3408914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3409914258bfSTheodore Ts'o } 3410914258bfSTheodore Ts'o } 3411c4be0c1dSTakashi Sato return error; 3412ac27a0ecSDave Kleikamp } 3413ac27a0ecSDave Kleikamp 3414ac27a0ecSDave Kleikamp /* 3415ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 3416ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 3417ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 3418ac27a0ecSDave Kleikamp */ 3419617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 3420617ba13bSMingming Cao struct ext4_super_block *es) 3421ac27a0ecSDave Kleikamp { 3422617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 3423ac27a0ecSDave Kleikamp 34240390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 34250390131bSFrank Mayhar BUG_ON(journal != NULL); 34260390131bSFrank Mayhar return; 34270390131bSFrank Mayhar } 3428dab291afSMingming Cao jbd2_journal_lock_updates(journal); 34297ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 34307ffe1ea8SHidehiro Kawai goto out; 34317ffe1ea8SHidehiro Kawai 3432617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 3433ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 3434617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3435e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3436ac27a0ecSDave Kleikamp } 34377ffe1ea8SHidehiro Kawai 34387ffe1ea8SHidehiro Kawai out: 3439dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 3440ac27a0ecSDave Kleikamp } 3441ac27a0ecSDave Kleikamp 3442ac27a0ecSDave Kleikamp /* 3443ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 3444ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 3445ac27a0ecSDave Kleikamp * main filesystem now. 3446ac27a0ecSDave Kleikamp */ 3447617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 3448617ba13bSMingming Cao struct ext4_super_block *es) 3449ac27a0ecSDave Kleikamp { 3450ac27a0ecSDave Kleikamp journal_t *journal; 3451ac27a0ecSDave Kleikamp int j_errno; 3452ac27a0ecSDave Kleikamp const char *errstr; 3453ac27a0ecSDave Kleikamp 34540390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 34550390131bSFrank Mayhar 3456617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 3457ac27a0ecSDave Kleikamp 3458ac27a0ecSDave Kleikamp /* 3459ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 3460617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 3461ac27a0ecSDave Kleikamp */ 3462ac27a0ecSDave Kleikamp 3463dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 3464ac27a0ecSDave Kleikamp if (j_errno) { 3465ac27a0ecSDave Kleikamp char nbuf[16]; 3466ac27a0ecSDave Kleikamp 3467617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 346812062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 3469ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 347012062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 3471ac27a0ecSDave Kleikamp 3472617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3473617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3474e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3475ac27a0ecSDave Kleikamp 3476dab291afSMingming Cao jbd2_journal_clear_err(journal); 3477ac27a0ecSDave Kleikamp } 3478ac27a0ecSDave Kleikamp } 3479ac27a0ecSDave Kleikamp 3480ac27a0ecSDave Kleikamp /* 3481ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 3482ac27a0ecSDave Kleikamp * and wait on the commit. 3483ac27a0ecSDave Kleikamp */ 3484617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 3485ac27a0ecSDave Kleikamp { 3486ac27a0ecSDave Kleikamp journal_t *journal; 34870390131bSFrank Mayhar int ret = 0; 3488ac27a0ecSDave Kleikamp 3489ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 3490ac27a0ecSDave Kleikamp return 0; 3491ac27a0ecSDave Kleikamp 3492617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 34936b0310fbSEric Sandeen if (journal) { 34946b0310fbSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_WRITE); 3495617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 34966b0310fbSEric Sandeen } 34970390131bSFrank Mayhar 3498ac27a0ecSDave Kleikamp return ret; 3499ac27a0ecSDave Kleikamp } 3500ac27a0ecSDave Kleikamp 3501617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 3502ac27a0ecSDave Kleikamp { 3503ebc1ac16SChristoph Hellwig lock_super(sb); 3504e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3505ebc1ac16SChristoph Hellwig unlock_super(sb); 35060390131bSFrank Mayhar } 3507ac27a0ecSDave Kleikamp 3508617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 3509ac27a0ecSDave Kleikamp { 351014ce0cb4STheodore Ts'o int ret = 0; 35119eddacf9SJan Kara tid_t target; 35128d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3513ac27a0ecSDave Kleikamp 35149bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 35158d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 35168d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 3517ac27a0ecSDave Kleikamp if (wait) 35188d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 35190390131bSFrank Mayhar } 352014ce0cb4STheodore Ts'o return ret; 3521ac27a0ecSDave Kleikamp } 3522ac27a0ecSDave Kleikamp 3523ac27a0ecSDave Kleikamp /* 3524ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 3525ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 3526ac27a0ecSDave Kleikamp */ 3527c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 3528ac27a0ecSDave Kleikamp { 3529c4be0c1dSTakashi Sato int error = 0; 3530c4be0c1dSTakashi Sato journal_t *journal; 3531ac27a0ecSDave Kleikamp 35329ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 35339ca92389STheodore Ts'o return 0; 35349ca92389STheodore Ts'o 3535c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 3536ac27a0ecSDave Kleikamp 3537ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 3538dab291afSMingming Cao jbd2_journal_lock_updates(journal); 35397ffe1ea8SHidehiro Kawai 35407ffe1ea8SHidehiro Kawai /* 35419ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 35429ca92389STheodore Ts'o * the journal. 35437ffe1ea8SHidehiro Kawai */ 3544c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 35456b0310fbSEric Sandeen if (error < 0) 35466b0310fbSEric Sandeen goto out; 3547ac27a0ecSDave Kleikamp 3548ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 3549617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3550e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 35516b0310fbSEric Sandeen out: 35526b0310fbSEric Sandeen /* we rely on s_frozen to stop further updates */ 35536b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 35546b0310fbSEric Sandeen return error; 3555ac27a0ecSDave Kleikamp } 3556ac27a0ecSDave Kleikamp 3557ac27a0ecSDave Kleikamp /* 3558ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 3559ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 3560ac27a0ecSDave Kleikamp */ 3561c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 3562ac27a0ecSDave Kleikamp { 35639ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 35649ca92389STheodore Ts'o return 0; 35659ca92389STheodore Ts'o 3566ac27a0ecSDave Kleikamp lock_super(sb); 35679ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 3568617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3569e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3570ac27a0ecSDave Kleikamp unlock_super(sb); 3571c4be0c1dSTakashi Sato return 0; 3572ac27a0ecSDave Kleikamp } 3573ac27a0ecSDave Kleikamp 3574617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 3575ac27a0ecSDave Kleikamp { 3576617ba13bSMingming Cao struct ext4_super_block *es; 3577617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3578617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 3579ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 3580617ba13bSMingming Cao struct ext4_mount_options old_opts; 3581c79d967dSChristoph Hellwig int enable_quota = 0; 35828a266467STheodore Ts'o ext4_group_t g; 3583b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3584ac27a0ecSDave Kleikamp int err; 3585ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3586ac27a0ecSDave Kleikamp int i; 3587ac27a0ecSDave Kleikamp #endif 3588d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3589ac27a0ecSDave Kleikamp 3590337eb00aSAlessio Igor Bogani lock_kernel(); 3591337eb00aSAlessio Igor Bogani 3592ac27a0ecSDave Kleikamp /* Store the original options */ 3593bbd6851aSAl Viro lock_super(sb); 3594ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 3595ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 3596ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 3597ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 3598ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 359930773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 360030773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 3601ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3602ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 3603ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3604ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 3605ac27a0ecSDave Kleikamp #endif 3606b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 3607b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 3608ac27a0ecSDave Kleikamp 3609ac27a0ecSDave Kleikamp /* 3610ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 3611ac27a0ecSDave Kleikamp */ 3612b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 3613b3881f74STheodore Ts'o &n_blocks_count, 1)) { 3614ac27a0ecSDave Kleikamp err = -EINVAL; 3615ac27a0ecSDave Kleikamp goto restore_opts; 3616ac27a0ecSDave Kleikamp } 3617ac27a0ecSDave Kleikamp 36184ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 361946e665e9SHarvey Harrison ext4_abort(sb, __func__, "Abort forced by user"); 3620ac27a0ecSDave Kleikamp 3621ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3622482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3623ac27a0ecSDave Kleikamp 3624ac27a0ecSDave Kleikamp es = sbi->s_es; 3625ac27a0ecSDave Kleikamp 3626b3881f74STheodore Ts'o if (sbi->s_journal) { 3627617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 3628b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3629b3881f74STheodore Ts'o } 3630ac27a0ecSDave Kleikamp 3631ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 3632bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 36334ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 3634ac27a0ecSDave Kleikamp err = -EROFS; 3635ac27a0ecSDave Kleikamp goto restore_opts; 3636ac27a0ecSDave Kleikamp } 3637ac27a0ecSDave Kleikamp 3638ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 36390f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 36400f0dd62fSChristoph Hellwig if (err < 0) 3641c79d967dSChristoph Hellwig goto restore_opts; 3642c79d967dSChristoph Hellwig 3643ac27a0ecSDave Kleikamp /* 3644ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 3645ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 3646ac27a0ecSDave Kleikamp */ 3647ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 3648ac27a0ecSDave Kleikamp 3649ac27a0ecSDave Kleikamp /* 3650ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 3651ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 3652ac27a0ecSDave Kleikamp * mark the partition as valid again. 3653ac27a0ecSDave Kleikamp */ 3654617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 3655617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 3656ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 3657ac27a0ecSDave Kleikamp 3658a63c9eb2STheodore Ts'o if (sbi->s_journal) 3659617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 3660ac27a0ecSDave Kleikamp } else { 3661a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 3662a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 3663ac27a0ecSDave Kleikamp err = -EROFS; 3664ac27a0ecSDave Kleikamp goto restore_opts; 3665ac27a0ecSDave Kleikamp } 3666ead6596bSEric Sandeen /* 36678a266467STheodore Ts'o * Make sure the group descriptor checksums 36680b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 36698a266467STheodore Ts'o */ 36708a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 36718a266467STheodore Ts'o struct ext4_group_desc *gdp = 36728a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 36738a266467STheodore Ts'o 36748a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 3675b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3676b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 36778a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 36788a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 36798a266467STheodore Ts'o err = -EINVAL; 36808a266467STheodore Ts'o goto restore_opts; 36818a266467STheodore Ts'o } 36828a266467STheodore Ts'o } 36838a266467STheodore Ts'o 36848a266467STheodore Ts'o /* 3685ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 3686ead6596bSEric Sandeen * around from a previously readonly bdev mount, 3687ead6596bSEric Sandeen * require a full umount/remount for now. 3688ead6596bSEric Sandeen */ 3689ead6596bSEric Sandeen if (es->s_last_orphan) { 3690b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 3691ead6596bSEric Sandeen "remount RDWR because of unprocessed " 3692ead6596bSEric Sandeen "orphan inode list. Please " 3693b31e1552SEric Sandeen "umount/remount instead"); 3694ead6596bSEric Sandeen err = -EINVAL; 3695ead6596bSEric Sandeen goto restore_opts; 3696ead6596bSEric Sandeen } 3697ead6596bSEric Sandeen 3698ac27a0ecSDave Kleikamp /* 3699ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 3700ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 3701ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 3702ac27a0ecSDave Kleikamp * the partition.) 3703ac27a0ecSDave Kleikamp */ 37040390131bSFrank Mayhar if (sbi->s_journal) 3705617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3706ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3707617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 3708ac27a0ecSDave Kleikamp goto restore_opts; 3709617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 3710ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 3711c79d967dSChristoph Hellwig enable_quota = 1; 3712ac27a0ecSDave Kleikamp } 3713ac27a0ecSDave Kleikamp } 37146fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 37150390131bSFrank Mayhar if (sbi->s_journal == NULL) 3716e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 37170390131bSFrank Mayhar 3718ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3719ac27a0ecSDave Kleikamp /* Release old quota file names */ 3720ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3721ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 3722ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3723ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 3724ac27a0ecSDave Kleikamp #endif 3725bbd6851aSAl Viro unlock_super(sb); 3726337eb00aSAlessio Igor Bogani unlock_kernel(); 3727c79d967dSChristoph Hellwig if (enable_quota) 37280f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 3729d4c402d9SCurt Wohlgemuth 3730d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 3731d4c402d9SCurt Wohlgemuth kfree(orig_data); 3732ac27a0ecSDave Kleikamp return 0; 37330b8e58a1SAndreas Dilger 3734ac27a0ecSDave Kleikamp restore_opts: 3735ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 3736ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 3737ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 3738ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 3739ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 374030773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 374130773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 3742ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3743ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 3744ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 3745ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 3746ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3747ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3748ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 3749ac27a0ecSDave Kleikamp } 3750ac27a0ecSDave Kleikamp #endif 3751bbd6851aSAl Viro unlock_super(sb); 3752337eb00aSAlessio Igor Bogani unlock_kernel(); 3753d4c402d9SCurt Wohlgemuth kfree(orig_data); 3754ac27a0ecSDave Kleikamp return err; 3755ac27a0ecSDave Kleikamp } 3756ac27a0ecSDave Kleikamp 3757617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 3758ac27a0ecSDave Kleikamp { 3759ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 3760617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3761617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 3762960cc398SPekka Enberg u64 fsid; 3763ac27a0ecSDave Kleikamp 37645e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 37655e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 37666bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 37678df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 37685e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 3769ac27a0ecSDave Kleikamp 3770ac27a0ecSDave Kleikamp /* 37715e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 37725e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 37735e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 3774ac27a0ecSDave Kleikamp */ 3775ac27a0ecSDave Kleikamp 3776ac27a0ecSDave Kleikamp /* 3777ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 3778ac27a0ecSDave Kleikamp * overhead 3779ac27a0ecSDave Kleikamp */ 3780ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 3781ac27a0ecSDave Kleikamp 3782ac27a0ecSDave Kleikamp /* 3783ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 3784ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 3785ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 3786ac27a0ecSDave Kleikamp */ 3787ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 3788617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 3789617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 3790ac27a0ecSDave Kleikamp cond_resched(); 3791ac27a0ecSDave Kleikamp } 3792ac27a0ecSDave Kleikamp 3793ac27a0ecSDave Kleikamp /* 3794ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 3795ac27a0ecSDave Kleikamp * bitmap, and an inode table. 3796ac27a0ecSDave Kleikamp */ 37975e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 37985e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 37995e70030dSBadari Pulavarty smp_wmb(); 38006bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 3801ac27a0ecSDave Kleikamp } 3802ac27a0ecSDave Kleikamp 3803617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 3804ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 38055e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 38066bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 38076bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 3808bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 3809bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 3810ac27a0ecSDave Kleikamp buf->f_bavail = 0; 3811ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 381252d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 3813617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 3814960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 3815960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 3816960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 3817960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 38180b8e58a1SAndreas Dilger 3819ac27a0ecSDave Kleikamp return 0; 3820ac27a0ecSDave Kleikamp } 3821ac27a0ecSDave Kleikamp 38220b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 38230b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 3824ac27a0ecSDave Kleikamp * Process 1 Process 2 3825617ba13bSMingming Cao * ext4_create() quota_sync() 3826dab291afSMingming Cao * jbd2_journal_start() write_dquot() 3827871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 3828dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 3829ac27a0ecSDave Kleikamp * 3830ac27a0ecSDave Kleikamp */ 3831ac27a0ecSDave Kleikamp 3832ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3833ac27a0ecSDave Kleikamp 3834ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3835ac27a0ecSDave Kleikamp { 3836ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3837ac27a0ecSDave Kleikamp } 3838ac27a0ecSDave Kleikamp 3839617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3840ac27a0ecSDave Kleikamp { 3841ac27a0ecSDave Kleikamp int ret, err; 3842ac27a0ecSDave Kleikamp handle_t *handle; 3843ac27a0ecSDave Kleikamp struct inode *inode; 3844ac27a0ecSDave Kleikamp 3845ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3846617ba13bSMingming Cao handle = ext4_journal_start(inode, 3847617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3848ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3849ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3850ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3851617ba13bSMingming Cao err = ext4_journal_stop(handle); 3852ac27a0ecSDave Kleikamp if (!ret) 3853ac27a0ecSDave Kleikamp ret = err; 3854ac27a0ecSDave Kleikamp return ret; 3855ac27a0ecSDave Kleikamp } 3856ac27a0ecSDave Kleikamp 3857617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3858ac27a0ecSDave Kleikamp { 3859ac27a0ecSDave Kleikamp int ret, err; 3860ac27a0ecSDave Kleikamp handle_t *handle; 3861ac27a0ecSDave Kleikamp 3862617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3863617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3864ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3865ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3866ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 3867617ba13bSMingming Cao err = ext4_journal_stop(handle); 3868ac27a0ecSDave Kleikamp if (!ret) 3869ac27a0ecSDave Kleikamp ret = err; 3870ac27a0ecSDave Kleikamp return ret; 3871ac27a0ecSDave Kleikamp } 3872ac27a0ecSDave Kleikamp 3873617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 3874ac27a0ecSDave Kleikamp { 3875ac27a0ecSDave Kleikamp int ret, err; 3876ac27a0ecSDave Kleikamp handle_t *handle; 3877ac27a0ecSDave Kleikamp 3878617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3879617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 38809c3013e9SJan Kara if (IS_ERR(handle)) { 38819c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 38829c3013e9SJan Kara dquot_release(dquot); 3883ac27a0ecSDave Kleikamp return PTR_ERR(handle); 38849c3013e9SJan Kara } 3885ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 3886617ba13bSMingming Cao err = ext4_journal_stop(handle); 3887ac27a0ecSDave Kleikamp if (!ret) 3888ac27a0ecSDave Kleikamp ret = err; 3889ac27a0ecSDave Kleikamp return ret; 3890ac27a0ecSDave Kleikamp } 3891ac27a0ecSDave Kleikamp 3892617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 3893ac27a0ecSDave Kleikamp { 38942c8be6b2SJan Kara /* Are we journaling quotas? */ 3895617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 3896617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 3897ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 3898617ba13bSMingming Cao return ext4_write_dquot(dquot); 3899ac27a0ecSDave Kleikamp } else { 3900ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 3901ac27a0ecSDave Kleikamp } 3902ac27a0ecSDave Kleikamp } 3903ac27a0ecSDave Kleikamp 3904617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 3905ac27a0ecSDave Kleikamp { 3906ac27a0ecSDave Kleikamp int ret, err; 3907ac27a0ecSDave Kleikamp handle_t *handle; 3908ac27a0ecSDave Kleikamp 3909ac27a0ecSDave Kleikamp /* Data block + inode block */ 3910617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 3911ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3912ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3913ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 3914617ba13bSMingming Cao err = ext4_journal_stop(handle); 3915ac27a0ecSDave Kleikamp if (!ret) 3916ac27a0ecSDave Kleikamp ret = err; 3917ac27a0ecSDave Kleikamp return ret; 3918ac27a0ecSDave Kleikamp } 3919ac27a0ecSDave Kleikamp 3920ac27a0ecSDave Kleikamp /* 3921ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 3922ac27a0ecSDave Kleikamp * the quota file and such... 3923ac27a0ecSDave Kleikamp */ 3924617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 3925ac27a0ecSDave Kleikamp { 3926287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 3927617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 3928ac27a0ecSDave Kleikamp } 3929ac27a0ecSDave Kleikamp 3930ac27a0ecSDave Kleikamp /* 3931ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 3932ac27a0ecSDave Kleikamp */ 3933617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 3934307ae18aSChristoph Hellwig char *name) 3935ac27a0ecSDave Kleikamp { 3936ac27a0ecSDave Kleikamp int err; 39378264613dSAl Viro struct path path; 3938ac27a0ecSDave Kleikamp 3939ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 3940ac27a0ecSDave Kleikamp return -EINVAL; 39410623543bSJan Kara 39428264613dSAl Viro err = kern_path(name, LOOKUP_FOLLOW, &path); 3943ac27a0ecSDave Kleikamp if (err) 3944ac27a0ecSDave Kleikamp return err; 39450623543bSJan Kara 3946ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 39478264613dSAl Viro if (path.mnt->mnt_sb != sb) { 39488264613dSAl Viro path_put(&path); 3949ac27a0ecSDave Kleikamp return -EXDEV; 3950ac27a0ecSDave Kleikamp } 39510623543bSJan Kara /* Journaling quota? */ 39520623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 39532b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 39548264613dSAl Viro if (path.dentry->d_parent != sb->s_root) 3955b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3956b31e1552SEric Sandeen "Quota file not on filesystem root. " 3957b31e1552SEric Sandeen "Journaled quota will not work"); 39580623543bSJan Kara } 39590623543bSJan Kara 39600623543bSJan Kara /* 39610623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 39620623543bSJan Kara * all updates to the file when we bypass pagecache... 39630623543bSJan Kara */ 39640390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 39650390131bSFrank Mayhar ext4_should_journal_data(path.dentry->d_inode)) { 39660623543bSJan Kara /* 39670623543bSJan Kara * We don't need to lock updates but journal_flush() could 39680623543bSJan Kara * otherwise be livelocked... 39690623543bSJan Kara */ 39700623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 39717ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 39720623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 39737ffe1ea8SHidehiro Kawai if (err) { 39748264613dSAl Viro path_put(&path); 39757ffe1ea8SHidehiro Kawai return err; 39767ffe1ea8SHidehiro Kawai } 39770623543bSJan Kara } 39780623543bSJan Kara 3979287a8095SChristoph Hellwig err = dquot_quota_on_path(sb, type, format_id, &path); 39808264613dSAl Viro path_put(&path); 398177e69dacSAl Viro return err; 3982ac27a0ecSDave Kleikamp } 3983ac27a0ecSDave Kleikamp 3984ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 3985ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 3986ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 3987ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 3988617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 3989ac27a0ecSDave Kleikamp size_t len, loff_t off) 3990ac27a0ecSDave Kleikamp { 3991ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3992725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3993ac27a0ecSDave Kleikamp int err = 0; 3994ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3995ac27a0ecSDave Kleikamp int tocopy; 3996ac27a0ecSDave Kleikamp size_t toread; 3997ac27a0ecSDave Kleikamp struct buffer_head *bh; 3998ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 3999ac27a0ecSDave Kleikamp 4000ac27a0ecSDave Kleikamp if (off > i_size) 4001ac27a0ecSDave Kleikamp return 0; 4002ac27a0ecSDave Kleikamp if (off+len > i_size) 4003ac27a0ecSDave Kleikamp len = i_size-off; 4004ac27a0ecSDave Kleikamp toread = len; 4005ac27a0ecSDave Kleikamp while (toread > 0) { 4006ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 4007ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 4008617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 4009ac27a0ecSDave Kleikamp if (err) 4010ac27a0ecSDave Kleikamp return err; 4011ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 4012ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 4013ac27a0ecSDave Kleikamp else 4014ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 4015ac27a0ecSDave Kleikamp brelse(bh); 4016ac27a0ecSDave Kleikamp offset = 0; 4017ac27a0ecSDave Kleikamp toread -= tocopy; 4018ac27a0ecSDave Kleikamp data += tocopy; 4019ac27a0ecSDave Kleikamp blk++; 4020ac27a0ecSDave Kleikamp } 4021ac27a0ecSDave Kleikamp return len; 4022ac27a0ecSDave Kleikamp } 4023ac27a0ecSDave Kleikamp 4024ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 4025ac27a0ecSDave Kleikamp * enough credits) */ 4026617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 4027ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 4028ac27a0ecSDave Kleikamp { 4029ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4030725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4031ac27a0ecSDave Kleikamp int err = 0; 4032ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4033617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 4034ac27a0ecSDave Kleikamp struct buffer_head *bh; 4035ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 4036ac27a0ecSDave Kleikamp 40370390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 4038b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4039b31e1552SEric Sandeen " cancelled because transaction is not started", 40409c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 40419c3013e9SJan Kara return -EIO; 40429c3013e9SJan Kara } 404367eeb568SDmitry Monakhov /* 404467eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 404567eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 404667eeb568SDmitry Monakhov */ 404767eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 404867eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 404967eeb568SDmitry Monakhov " cancelled because not block aligned", 405067eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 405167eeb568SDmitry Monakhov return -EIO; 405267eeb568SDmitry Monakhov } 405367eeb568SDmitry Monakhov 4054ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 4055617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 4056ac27a0ecSDave Kleikamp if (!bh) 4057ac27a0ecSDave Kleikamp goto out; 4058ac27a0ecSDave Kleikamp if (journal_quota) { 4059617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 4060ac27a0ecSDave Kleikamp if (err) { 4061ac27a0ecSDave Kleikamp brelse(bh); 4062ac27a0ecSDave Kleikamp goto out; 4063ac27a0ecSDave Kleikamp } 4064ac27a0ecSDave Kleikamp } 4065ac27a0ecSDave Kleikamp lock_buffer(bh); 406667eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 4067ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 4068ac27a0ecSDave Kleikamp unlock_buffer(bh); 4069ac27a0ecSDave Kleikamp if (journal_quota) 40700390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 4071ac27a0ecSDave Kleikamp else { 4072ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 4073678aaf48SJan Kara err = ext4_jbd2_file_inode(handle, inode); 4074ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 4075ac27a0ecSDave Kleikamp } 4076ac27a0ecSDave Kleikamp brelse(bh); 4077ac27a0ecSDave Kleikamp out: 407867eeb568SDmitry Monakhov if (err) { 40794d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 4080ac27a0ecSDave Kleikamp return err; 40814d04e4fbSJan Kara } 408267eeb568SDmitry Monakhov if (inode->i_size < off + len) { 408367eeb568SDmitry Monakhov i_size_write(inode, off + len); 4084617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 4085ac27a0ecSDave Kleikamp } 4086ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 4087617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 4088ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 408967eeb568SDmitry Monakhov return len; 4090ac27a0ecSDave Kleikamp } 4091ac27a0ecSDave Kleikamp 4092ac27a0ecSDave Kleikamp #endif 4093ac27a0ecSDave Kleikamp 40940b8e58a1SAndreas Dilger static int ext4_get_sb(struct file_system_type *fs_type, int flags, 40950b8e58a1SAndreas Dilger const char *dev_name, void *data, struct vfsmount *mnt) 4096ac27a0ecSDave Kleikamp { 4097617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); 4098ac27a0ecSDave Kleikamp } 4099ac27a0ecSDave Kleikamp 410037f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 410124b58424STheodore Ts'o static struct file_system_type ext2_fs_type = { 410224b58424STheodore Ts'o .owner = THIS_MODULE, 410324b58424STheodore Ts'o .name = "ext2", 410424b58424STheodore Ts'o .get_sb = ext4_get_sb, 410524b58424STheodore Ts'o .kill_sb = kill_block_super, 410624b58424STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 410724b58424STheodore Ts'o }; 410824b58424STheodore Ts'o 410924b58424STheodore Ts'o static inline void register_as_ext2(void) 411024b58424STheodore Ts'o { 411124b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 411224b58424STheodore Ts'o if (err) 411324b58424STheodore Ts'o printk(KERN_WARNING 411424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 411524b58424STheodore Ts'o } 411624b58424STheodore Ts'o 411724b58424STheodore Ts'o static inline void unregister_as_ext2(void) 411824b58424STheodore Ts'o { 411924b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 412024b58424STheodore Ts'o } 412151b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 412224b58424STheodore Ts'o #else 412324b58424STheodore Ts'o static inline void register_as_ext2(void) { } 412424b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 412524b58424STheodore Ts'o #endif 412624b58424STheodore Ts'o 412737f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 412824b58424STheodore Ts'o static inline void register_as_ext3(void) 412924b58424STheodore Ts'o { 413024b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 413124b58424STheodore Ts'o if (err) 413224b58424STheodore Ts'o printk(KERN_WARNING 413324b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 413424b58424STheodore Ts'o } 413524b58424STheodore Ts'o 413624b58424STheodore Ts'o static inline void unregister_as_ext3(void) 413724b58424STheodore Ts'o { 413824b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 413924b58424STheodore Ts'o } 414051b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 414124b58424STheodore Ts'o #else 414224b58424STheodore Ts'o static inline void register_as_ext3(void) { } 414324b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 414424b58424STheodore Ts'o #endif 414524b58424STheodore Ts'o 414603010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 4147ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 414803010a33STheodore Ts'o .name = "ext4", 4149617ba13bSMingming Cao .get_sb = ext4_get_sb, 4150ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 4151ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 4152ac27a0ecSDave Kleikamp }; 4153ac27a0ecSDave Kleikamp 4154617ba13bSMingming Cao static int __init init_ext4_fs(void) 4155ac27a0ecSDave Kleikamp { 4156c9de560dSAlex Tomas int err; 4157c9de560dSAlex Tomas 415812e9b892SDmitry Monakhov ext4_check_flag_values(); 41596fd058f7STheodore Ts'o err = init_ext4_system_zone(); 41606fd058f7STheodore Ts'o if (err) 41616fd058f7STheodore Ts'o return err; 41623197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 41633197ebdbSTheodore Ts'o if (!ext4_kset) 41646fd058f7STheodore Ts'o goto out4; 41659f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 4166c9de560dSAlex Tomas err = init_ext4_mballoc(); 4167ac27a0ecSDave Kleikamp if (err) 41686fd058f7STheodore Ts'o goto out3; 4169c9de560dSAlex Tomas 4170c9de560dSAlex Tomas err = init_ext4_xattr(); 4171c9de560dSAlex Tomas if (err) 4172c9de560dSAlex Tomas goto out2; 4173ac27a0ecSDave Kleikamp err = init_inodecache(); 4174ac27a0ecSDave Kleikamp if (err) 4175ac27a0ecSDave Kleikamp goto out1; 417624b58424STheodore Ts'o register_as_ext2(); 417724b58424STheodore Ts'o register_as_ext3(); 417803010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 4179ac27a0ecSDave Kleikamp if (err) 4180ac27a0ecSDave Kleikamp goto out; 4181ac27a0ecSDave Kleikamp return 0; 4182ac27a0ecSDave Kleikamp out: 418324b58424STheodore Ts'o unregister_as_ext2(); 418424b58424STheodore Ts'o unregister_as_ext3(); 4185ac27a0ecSDave Kleikamp destroy_inodecache(); 4186ac27a0ecSDave Kleikamp out1: 4187617ba13bSMingming Cao exit_ext4_xattr(); 4188c9de560dSAlex Tomas out2: 4189c9de560dSAlex Tomas exit_ext4_mballoc(); 41906fd058f7STheodore Ts'o out3: 41916fd058f7STheodore Ts'o remove_proc_entry("fs/ext4", NULL); 41926fd058f7STheodore Ts'o kset_unregister(ext4_kset); 41936fd058f7STheodore Ts'o out4: 41946fd058f7STheodore Ts'o exit_ext4_system_zone(); 4195ac27a0ecSDave Kleikamp return err; 4196ac27a0ecSDave Kleikamp } 4197ac27a0ecSDave Kleikamp 4198617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 4199ac27a0ecSDave Kleikamp { 420024b58424STheodore Ts'o unregister_as_ext2(); 420124b58424STheodore Ts'o unregister_as_ext3(); 420203010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 4203ac27a0ecSDave Kleikamp destroy_inodecache(); 4204617ba13bSMingming Cao exit_ext4_xattr(); 4205c9de560dSAlex Tomas exit_ext4_mballoc(); 42069f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 42073197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 42086fd058f7STheodore Ts'o exit_ext4_system_zone(); 4209ac27a0ecSDave Kleikamp } 4210ac27a0ecSDave Kleikamp 4211ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 421283982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 4213ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 4214617ba13bSMingming Cao module_init(init_ext4_fs) 4215617ba13bSMingming Cao module_exit(exit_ext4_fs) 4216