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 244ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 245ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 246ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 247617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2480390131bSFrank Mayhar if (journal) { 249ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 2500b8e58a1SAndreas Dilger ext4_abort(sb, __func__, "Detected aborted journal"); 251ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 252ac27a0ecSDave Kleikamp } 253dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 254ac27a0ecSDave Kleikamp } 255d3d1faf6SCurt Wohlgemuth return ext4_get_nojournal(); 2560390131bSFrank Mayhar } 257ac27a0ecSDave Kleikamp 258ac27a0ecSDave Kleikamp /* 259ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 260dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 261ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 262ac27a0ecSDave Kleikamp * appropriate. 263ac27a0ecSDave Kleikamp */ 264617ba13bSMingming Cao int __ext4_journal_stop(const char *where, handle_t *handle) 265ac27a0ecSDave Kleikamp { 266ac27a0ecSDave Kleikamp struct super_block *sb; 267ac27a0ecSDave Kleikamp int err; 268ac27a0ecSDave Kleikamp int rc; 269ac27a0ecSDave Kleikamp 2700390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 271d3d1faf6SCurt Wohlgemuth ext4_put_nojournal(handle); 2720390131bSFrank Mayhar return 0; 2730390131bSFrank Mayhar } 274ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 275ac27a0ecSDave Kleikamp err = handle->h_err; 276dab291afSMingming Cao rc = jbd2_journal_stop(handle); 277ac27a0ecSDave Kleikamp 278ac27a0ecSDave Kleikamp if (!err) 279ac27a0ecSDave Kleikamp err = rc; 280ac27a0ecSDave Kleikamp if (err) 281617ba13bSMingming Cao __ext4_std_error(sb, where, err); 282ac27a0ecSDave Kleikamp return err; 283ac27a0ecSDave Kleikamp } 284ac27a0ecSDave Kleikamp 285617ba13bSMingming Cao void ext4_journal_abort_handle(const char *caller, const char *err_fn, 286ac27a0ecSDave Kleikamp struct buffer_head *bh, handle_t *handle, int err) 287ac27a0ecSDave Kleikamp { 288ac27a0ecSDave Kleikamp char nbuf[16]; 289617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 290ac27a0ecSDave Kleikamp 2910390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 2920390131bSFrank Mayhar 293ac27a0ecSDave Kleikamp if (bh) 294ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 295ac27a0ecSDave Kleikamp 296ac27a0ecSDave Kleikamp if (!handle->h_err) 297ac27a0ecSDave Kleikamp handle->h_err = err; 298ac27a0ecSDave Kleikamp 299ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 300ac27a0ecSDave Kleikamp return; 301ac27a0ecSDave Kleikamp 302ac27a0ecSDave Kleikamp printk(KERN_ERR "%s: aborting transaction: %s in %s\n", 303ac27a0ecSDave Kleikamp caller, errstr, err_fn); 304ac27a0ecSDave Kleikamp 305dab291afSMingming Cao jbd2_journal_abort_handle(handle); 306ac27a0ecSDave Kleikamp } 307ac27a0ecSDave Kleikamp 308ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 309ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 310ac27a0ecSDave Kleikamp * 311ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 312617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 313ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 314ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 315ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 316ac27a0ecSDave Kleikamp * write out the superblock safely. 317ac27a0ecSDave Kleikamp * 318dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 319d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 320ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 321ac27a0ecSDave Kleikamp */ 322ac27a0ecSDave Kleikamp 323617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 324ac27a0ecSDave Kleikamp { 325617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 326ac27a0ecSDave Kleikamp 327617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 328617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 329ac27a0ecSDave Kleikamp 330ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 331ac27a0ecSDave Kleikamp return; 332ac27a0ecSDave Kleikamp 333ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 334617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 335ac27a0ecSDave Kleikamp 3364ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 337ac27a0ecSDave Kleikamp if (journal) 338dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 339ac27a0ecSDave Kleikamp } 340ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 341b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 342ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 343ac27a0ecSDave Kleikamp } 344e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 345ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 346617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 347ac27a0ecSDave Kleikamp sb->s_id); 348ac27a0ecSDave Kleikamp } 349ac27a0ecSDave Kleikamp 35012062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 351ac27a0ecSDave Kleikamp const char *fmt, ...) 352ac27a0ecSDave Kleikamp { 353ac27a0ecSDave Kleikamp va_list args; 354ac27a0ecSDave Kleikamp 355ac27a0ecSDave Kleikamp va_start(args, fmt); 356617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 357ac27a0ecSDave Kleikamp vprintk(fmt, args); 358ac27a0ecSDave Kleikamp printk("\n"); 359ac27a0ecSDave Kleikamp va_end(args); 360ac27a0ecSDave Kleikamp 361617ba13bSMingming Cao ext4_handle_error(sb); 362ac27a0ecSDave Kleikamp } 363ac27a0ecSDave Kleikamp 364273df556SFrank Mayhar void ext4_error_inode(const char *function, struct inode *inode, 365273df556SFrank Mayhar const char *fmt, ...) 366273df556SFrank Mayhar { 367273df556SFrank Mayhar va_list args; 368273df556SFrank Mayhar 369273df556SFrank Mayhar va_start(args, fmt); 370273df556SFrank Mayhar printk(KERN_CRIT "EXT4-fs error (device %s): %s: inode #%lu: (comm %s) ", 371273df556SFrank Mayhar inode->i_sb->s_id, function, inode->i_ino, current->comm); 372273df556SFrank Mayhar vprintk(fmt, args); 373273df556SFrank Mayhar printk("\n"); 374273df556SFrank Mayhar va_end(args); 375273df556SFrank Mayhar 376273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 377273df556SFrank Mayhar } 378273df556SFrank Mayhar 379273df556SFrank Mayhar void ext4_error_file(const char *function, struct file *file, 380273df556SFrank Mayhar const char *fmt, ...) 381273df556SFrank Mayhar { 382273df556SFrank Mayhar va_list args; 383273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 384273df556SFrank Mayhar char pathname[80], *path; 385273df556SFrank Mayhar 386273df556SFrank Mayhar va_start(args, fmt); 387273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 388273df556SFrank Mayhar if (!path) 389273df556SFrank Mayhar path = "(unknown)"; 390273df556SFrank Mayhar printk(KERN_CRIT 391273df556SFrank Mayhar "EXT4-fs error (device %s): %s: inode #%lu (comm %s path %s): ", 392273df556SFrank Mayhar inode->i_sb->s_id, function, inode->i_ino, current->comm, path); 393273df556SFrank Mayhar vprintk(fmt, args); 394273df556SFrank Mayhar printk("\n"); 395273df556SFrank Mayhar va_end(args); 396273df556SFrank Mayhar 397273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 398273df556SFrank Mayhar } 399273df556SFrank Mayhar 400617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 401ac27a0ecSDave Kleikamp char nbuf[16]) 402ac27a0ecSDave Kleikamp { 403ac27a0ecSDave Kleikamp char *errstr = NULL; 404ac27a0ecSDave Kleikamp 405ac27a0ecSDave Kleikamp switch (errno) { 406ac27a0ecSDave Kleikamp case -EIO: 407ac27a0ecSDave Kleikamp errstr = "IO failure"; 408ac27a0ecSDave Kleikamp break; 409ac27a0ecSDave Kleikamp case -ENOMEM: 410ac27a0ecSDave Kleikamp errstr = "Out of memory"; 411ac27a0ecSDave Kleikamp break; 412ac27a0ecSDave Kleikamp case -EROFS: 41378f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 41478f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 415ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 416ac27a0ecSDave Kleikamp else 417ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 418ac27a0ecSDave Kleikamp break; 419ac27a0ecSDave Kleikamp default: 420ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 421ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 422ac27a0ecSDave Kleikamp * NULL. */ 423ac27a0ecSDave Kleikamp if (nbuf) { 424ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 425ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 426ac27a0ecSDave Kleikamp errstr = nbuf; 427ac27a0ecSDave Kleikamp } 428ac27a0ecSDave Kleikamp break; 429ac27a0ecSDave Kleikamp } 430ac27a0ecSDave Kleikamp 431ac27a0ecSDave Kleikamp return errstr; 432ac27a0ecSDave Kleikamp } 433ac27a0ecSDave Kleikamp 434617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 435ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 436ac27a0ecSDave Kleikamp 4372b2d6d01STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, int errno) 438ac27a0ecSDave Kleikamp { 439ac27a0ecSDave Kleikamp char nbuf[16]; 440ac27a0ecSDave Kleikamp const char *errstr; 441ac27a0ecSDave Kleikamp 442ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 443ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 444ac27a0ecSDave Kleikamp * an error. */ 445ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 446ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 447ac27a0ecSDave Kleikamp return; 448ac27a0ecSDave Kleikamp 449617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 450617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", 451ac27a0ecSDave Kleikamp sb->s_id, function, errstr); 452ac27a0ecSDave Kleikamp 453617ba13bSMingming Cao ext4_handle_error(sb); 454ac27a0ecSDave Kleikamp } 455ac27a0ecSDave Kleikamp 456ac27a0ecSDave Kleikamp /* 457617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 458ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 459ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 460ac27a0ecSDave Kleikamp * 461ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 462ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 463ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 464ac27a0ecSDave Kleikamp */ 465ac27a0ecSDave Kleikamp 466617ba13bSMingming Cao void ext4_abort(struct super_block *sb, const char *function, 467ac27a0ecSDave Kleikamp const char *fmt, ...) 468ac27a0ecSDave Kleikamp { 469ac27a0ecSDave Kleikamp va_list args; 470ac27a0ecSDave Kleikamp 471ac27a0ecSDave Kleikamp va_start(args, fmt); 472617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 473ac27a0ecSDave Kleikamp vprintk(fmt, args); 474ac27a0ecSDave Kleikamp printk("\n"); 475ac27a0ecSDave Kleikamp va_end(args); 476ac27a0ecSDave Kleikamp 477ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 478617ba13bSMingming Cao panic("EXT4-fs panic from previous error\n"); 479ac27a0ecSDave Kleikamp 480ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 481ac27a0ecSDave Kleikamp return; 482ac27a0ecSDave Kleikamp 483b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 484617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 485ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4864ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 487ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 488dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 489ac27a0ecSDave Kleikamp } 490ac27a0ecSDave Kleikamp 491b31e1552SEric Sandeen void ext4_msg (struct super_block * sb, const char *prefix, 492b31e1552SEric Sandeen const char *fmt, ...) 493b31e1552SEric Sandeen { 494b31e1552SEric Sandeen va_list args; 495b31e1552SEric Sandeen 496b31e1552SEric Sandeen va_start(args, fmt); 497b31e1552SEric Sandeen printk("%sEXT4-fs (%s): ", prefix, sb->s_id); 498b31e1552SEric Sandeen vprintk(fmt, args); 499b31e1552SEric Sandeen printk("\n"); 500b31e1552SEric Sandeen va_end(args); 501b31e1552SEric Sandeen } 502b31e1552SEric Sandeen 50312062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 504ac27a0ecSDave Kleikamp const char *fmt, ...) 505ac27a0ecSDave Kleikamp { 506ac27a0ecSDave Kleikamp va_list args; 507ac27a0ecSDave Kleikamp 508ac27a0ecSDave Kleikamp va_start(args, fmt); 509617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", 510ac27a0ecSDave Kleikamp sb->s_id, function); 511ac27a0ecSDave Kleikamp vprintk(fmt, args); 512ac27a0ecSDave Kleikamp printk("\n"); 513ac27a0ecSDave Kleikamp va_end(args); 514ac27a0ecSDave Kleikamp } 515ac27a0ecSDave Kleikamp 5165d1b1b3fSAneesh Kumar K.V void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, 5175d1b1b3fSAneesh Kumar K.V const char *function, const char *fmt, ...) 5185d1b1b3fSAneesh Kumar K.V __releases(bitlock) 5195d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 5205d1b1b3fSAneesh Kumar K.V { 5215d1b1b3fSAneesh Kumar K.V va_list args; 5225d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 5235d1b1b3fSAneesh Kumar K.V 5245d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 5255d1b1b3fSAneesh Kumar K.V printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 5265d1b1b3fSAneesh Kumar K.V vprintk(fmt, args); 5275d1b1b3fSAneesh Kumar K.V printk("\n"); 5285d1b1b3fSAneesh Kumar K.V va_end(args); 5295d1b1b3fSAneesh Kumar K.V 5305d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 5315d1b1b3fSAneesh Kumar K.V EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 5325d1b1b3fSAneesh Kumar K.V es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 533e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 5345d1b1b3fSAneesh Kumar K.V return; 5355d1b1b3fSAneesh Kumar K.V } 5365d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 5375d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 5385d1b1b3fSAneesh Kumar K.V /* 5395d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 5405d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 5415d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 5425d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 5435d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 5445d1b1b3fSAneesh Kumar K.V * ext4_grp_locked_error() to distinguish beween the 5455d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 5465d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 5475d1b1b3fSAneesh Kumar K.V * more appropriate error code. 5485d1b1b3fSAneesh Kumar K.V */ 5495d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 5505d1b1b3fSAneesh Kumar K.V return; 5515d1b1b3fSAneesh Kumar K.V } 5525d1b1b3fSAneesh Kumar K.V 553617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 554ac27a0ecSDave Kleikamp { 555617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 556ac27a0ecSDave Kleikamp 557617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 558ac27a0ecSDave Kleikamp return; 559ac27a0ecSDave Kleikamp 56012062dddSEric Sandeen ext4_warning(sb, 561ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 562ac27a0ecSDave Kleikamp "running e2fsck is recommended", 563617ba13bSMingming Cao EXT4_DYNAMIC_REV); 564ac27a0ecSDave Kleikamp 565617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 566617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 567617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 568ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 569ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 570ac27a0ecSDave Kleikamp 571ac27a0ecSDave Kleikamp /* 572ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 573ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 574ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 575ac27a0ecSDave Kleikamp */ 576ac27a0ecSDave Kleikamp } 577ac27a0ecSDave Kleikamp 578ac27a0ecSDave Kleikamp /* 579ac27a0ecSDave Kleikamp * Open the external journal device 580ac27a0ecSDave Kleikamp */ 581b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 582ac27a0ecSDave Kleikamp { 583ac27a0ecSDave Kleikamp struct block_device *bdev; 584ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 585ac27a0ecSDave Kleikamp 586ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 587ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 588ac27a0ecSDave Kleikamp goto fail; 589ac27a0ecSDave Kleikamp return bdev; 590ac27a0ecSDave Kleikamp 591ac27a0ecSDave Kleikamp fail: 592b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 593ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 594ac27a0ecSDave Kleikamp return NULL; 595ac27a0ecSDave Kleikamp } 596ac27a0ecSDave Kleikamp 597ac27a0ecSDave Kleikamp /* 598ac27a0ecSDave Kleikamp * Release the journal device 599ac27a0ecSDave Kleikamp */ 600617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 601ac27a0ecSDave Kleikamp { 602ac27a0ecSDave Kleikamp bd_release(bdev); 6039a1c3542SAl Viro return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 604ac27a0ecSDave Kleikamp } 605ac27a0ecSDave Kleikamp 606617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 607ac27a0ecSDave Kleikamp { 608ac27a0ecSDave Kleikamp struct block_device *bdev; 609ac27a0ecSDave Kleikamp int ret = -ENODEV; 610ac27a0ecSDave Kleikamp 611ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 612ac27a0ecSDave Kleikamp if (bdev) { 613617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 614ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 615ac27a0ecSDave Kleikamp } 616ac27a0ecSDave Kleikamp return ret; 617ac27a0ecSDave Kleikamp } 618ac27a0ecSDave Kleikamp 619ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 620ac27a0ecSDave Kleikamp { 621617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 622ac27a0ecSDave Kleikamp } 623ac27a0ecSDave Kleikamp 624617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 625ac27a0ecSDave Kleikamp { 626ac27a0ecSDave Kleikamp struct list_head *l; 627ac27a0ecSDave Kleikamp 628b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 629ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 630ac27a0ecSDave Kleikamp 631ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 632ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 633ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 634ac27a0ecSDave Kleikamp printk(KERN_ERR " " 635ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 636ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 637ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 638ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 639ac27a0ecSDave Kleikamp } 640ac27a0ecSDave Kleikamp } 641ac27a0ecSDave Kleikamp 642617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 643ac27a0ecSDave Kleikamp { 644617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 645617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 646ef2cabf7SHidehiro Kawai int i, err; 647ac27a0ecSDave Kleikamp 6484c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 6494c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 6504c0425ffSMingming Cao 651a9e220f8SAl Viro lock_super(sb); 6526cfd0148SChristoph Hellwig lock_kernel(); 6538c85e125SChristoph Hellwig if (sb->s_dirt) 654ebc1ac16SChristoph Hellwig ext4_commit_super(sb, 1); 6558c85e125SChristoph Hellwig 6560390131bSFrank Mayhar if (sbi->s_journal) { 657ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 65847b4a50bSJan Kara sbi->s_journal = NULL; 659ef2cabf7SHidehiro Kawai if (err < 0) 6600390131bSFrank Mayhar ext4_abort(sb, __func__, 6610390131bSFrank Mayhar "Couldn't clean up the journal"); 6620390131bSFrank Mayhar } 663d4edac31SJosef Bacik 664d4edac31SJosef Bacik ext4_release_system_zone(sb); 665d4edac31SJosef Bacik ext4_mb_release(sb); 666d4edac31SJosef Bacik ext4_ext_release(sb); 667d4edac31SJosef Bacik ext4_xattr_put_super(sb); 668d4edac31SJosef Bacik 669ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 670617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 671ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 672e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 673ac27a0ecSDave Kleikamp } 674240799cdSTheodore Ts'o if (sbi->s_proc) { 6759f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 676240799cdSTheodore Ts'o } 6773197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 678ac27a0ecSDave Kleikamp 679ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 680ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 681ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 682c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 683c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 684c5ca7c76STheodore Ts'o else 685772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 686ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 687ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 688ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 6896bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 690ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 691ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 692ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 693ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 694ac27a0ecSDave Kleikamp #endif 695ac27a0ecSDave Kleikamp 696ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 697ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 698ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 699ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 700ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 701ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 702ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 703ac27a0ecSDave Kleikamp 704f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 705ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 706ac27a0ecSDave Kleikamp /* 707ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 708ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 709ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 710ac27a0ecSDave Kleikamp */ 711ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 712f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 713617ba13bSMingming Cao ext4_blkdev_remove(sbi); 714ac27a0ecSDave Kleikamp } 715ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 7163197ebdbSTheodore Ts'o /* 7173197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 7183197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 7193197ebdbSTheodore Ts'o */ 7203197ebdbSTheodore Ts'o unlock_kernel(); 7213197ebdbSTheodore Ts'o unlock_super(sb); 7223197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 7233197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 724705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 725ac27a0ecSDave Kleikamp kfree(sbi); 726ac27a0ecSDave Kleikamp } 727ac27a0ecSDave Kleikamp 728e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 729ac27a0ecSDave Kleikamp 730ac27a0ecSDave Kleikamp /* 731ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 732ac27a0ecSDave Kleikamp */ 733617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 734ac27a0ecSDave Kleikamp { 735617ba13bSMingming Cao struct ext4_inode_info *ei; 736ac27a0ecSDave Kleikamp 737e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 738ac27a0ecSDave Kleikamp if (!ei) 739ac27a0ecSDave Kleikamp return NULL; 7400b8e58a1SAndreas Dilger 741ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 74291246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 743a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 744c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 745c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 7460390131bSFrank Mayhar /* 7470390131bSFrank Mayhar * Note: We can be called before EXT4_SB(sb)->s_journal is set, 7480390131bSFrank Mayhar * therefore it can be null here. Don't check it, just initialize 7490390131bSFrank Mayhar * jinode. 7500390131bSFrank Mayhar */ 751678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 752d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 753d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 754d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 7559d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 756d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 757d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 758a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 759a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 760a9e7f447SDmitry Monakhov #endif 761c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 762744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 7638d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 764b436b9beSJan Kara ei->i_sync_tid = 0; 765b436b9beSJan Kara ei->i_datasync_tid = 0; 7660b8e58a1SAndreas Dilger 767ac27a0ecSDave Kleikamp return &ei->vfs_inode; 768ac27a0ecSDave Kleikamp } 769ac27a0ecSDave Kleikamp 770617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 771ac27a0ecSDave Kleikamp { 7729f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 773b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 774b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 775b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 7769f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 7779f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 7789f7dd93dSVasily Averin true); 7799f7dd93dSVasily Averin dump_stack(); 7809f7dd93dSVasily Averin } 781617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 782ac27a0ecSDave Kleikamp } 783ac27a0ecSDave Kleikamp 78451cc5068SAlexey Dobriyan static void init_once(void *foo) 785ac27a0ecSDave Kleikamp { 786617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 787ac27a0ecSDave Kleikamp 788ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 78903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 790ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 791ac27a0ecSDave Kleikamp #endif 7920e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 793ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 794ac27a0ecSDave Kleikamp } 795ac27a0ecSDave Kleikamp 796ac27a0ecSDave Kleikamp static int init_inodecache(void) 797ac27a0ecSDave Kleikamp { 798617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 799617ba13bSMingming Cao sizeof(struct ext4_inode_info), 800ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 801ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 80220c2df83SPaul Mundt init_once); 803617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 804ac27a0ecSDave Kleikamp return -ENOMEM; 805ac27a0ecSDave Kleikamp return 0; 806ac27a0ecSDave Kleikamp } 807ac27a0ecSDave Kleikamp 808ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 809ac27a0ecSDave Kleikamp { 810617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 811ac27a0ecSDave Kleikamp } 812ac27a0ecSDave Kleikamp 813617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 814ac27a0ecSDave Kleikamp { 8159f754758SChristoph Hellwig dquot_drop(inode); 816c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 8170390131bSFrank Mayhar if (EXT4_JOURNAL(inode)) 818678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 819678aaf48SJan Kara &EXT4_I(inode)->jinode); 820ac27a0ecSDave Kleikamp } 821ac27a0ecSDave Kleikamp 8222b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 8232b2d6d01STheodore Ts'o struct super_block *sb) 824ac27a0ecSDave Kleikamp { 825ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 826617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 827ac27a0ecSDave Kleikamp 8285a20bdfcSJan Kara if (sbi->s_jquota_fmt) { 8295a20bdfcSJan Kara char *fmtname = ""; 8305a20bdfcSJan Kara 8315a20bdfcSJan Kara switch (sbi->s_jquota_fmt) { 8325a20bdfcSJan Kara case QFMT_VFS_OLD: 8335a20bdfcSJan Kara fmtname = "vfsold"; 8345a20bdfcSJan Kara break; 8355a20bdfcSJan Kara case QFMT_VFS_V0: 8365a20bdfcSJan Kara fmtname = "vfsv0"; 8375a20bdfcSJan Kara break; 8385a20bdfcSJan Kara case QFMT_VFS_V1: 8395a20bdfcSJan Kara fmtname = "vfsv1"; 8405a20bdfcSJan Kara break; 8415a20bdfcSJan Kara } 8425a20bdfcSJan Kara seq_printf(seq, ",jqfmt=%s", fmtname); 8435a20bdfcSJan Kara } 844ac27a0ecSDave Kleikamp 845ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 846ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 847ac27a0ecSDave Kleikamp 848ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 849ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 850ac27a0ecSDave Kleikamp 851482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA)) 852ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 853ac27a0ecSDave Kleikamp 854482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA)) 855ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 856ac27a0ecSDave Kleikamp #endif 857ac27a0ecSDave Kleikamp } 858ac27a0ecSDave Kleikamp 859d9c9bef1SMiklos Szeredi /* 860d9c9bef1SMiklos Szeredi * Show an option if 861d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 862d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 863d9c9bef1SMiklos Szeredi */ 864617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 865ac27a0ecSDave Kleikamp { 866aa22df2cSAneesh Kumar K.V int def_errors; 867aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 868ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 869d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 870d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 871d9c9bef1SMiklos Szeredi 872d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 873aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 874d9c9bef1SMiklos Szeredi 875d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 876d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 877d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 878d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 879aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 880d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 881d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 882d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 883d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 884d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 885d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 886d9c9bef1SMiklos Szeredi } 887d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 888d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 889d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 890d9c9bef1SMiklos Szeredi } 891bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 892d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 893bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 894d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 895bb4f397aSAneesh Kumar K.V } 896bb4f397aSAneesh Kumar K.V } 897aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 898bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 899aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 900d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 901aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 902d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 903aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 904d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 905d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 906d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 90703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 908aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 909aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 910d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 911d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 912d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 913d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 914d9c9bef1SMiklos Szeredi } 915d9c9bef1SMiklos Szeredi #endif 91603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 917aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 918d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 919d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 920d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 921d9c9bef1SMiklos Szeredi #endif 92230773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 923d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 924d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 925d9c9bef1SMiklos Szeredi } 92630773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 92730773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 92830773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 92930773840STheodore Ts'o } 93030773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 93130773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 93230773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 93330773840STheodore Ts'o } 93430773840STheodore Ts'o 935571640caSEric Sandeen /* 936571640caSEric Sandeen * We're changing the default of barrier mount option, so 937571640caSEric Sandeen * let's always display its mount state so it's clear what its 938571640caSEric Sandeen * status is. 939571640caSEric Sandeen */ 940571640caSEric Sandeen seq_puts(seq, ",barrier="); 941571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 942cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 943cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 944d9c9bef1SMiklos Szeredi if (test_opt(sb, NOBH)) 945d9c9bef1SMiklos Szeredi seq_puts(seq, ",nobh"); 94625ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 94725ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 948dd919b98SAneesh Kumar K.V if (!test_opt(sb, DELALLOC)) 949dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 950dd919b98SAneesh Kumar K.V 951ac27a0ecSDave Kleikamp 952cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 953cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 954aa22df2cSAneesh Kumar K.V /* 955aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 956aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 957aa22df2cSAneesh Kumar K.V */ 958617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 959ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 960617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 961ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 962617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 963ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 964ac27a0ecSDave Kleikamp 965240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 966240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 967240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 968240799cdSTheodore Ts'o 9695bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 9705bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 9715bf5683aSHidehiro Kawai 972afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 97306705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 974afd4672dSTheodore Ts'o 9755328e635SEric Sandeen if (test_opt(sb, DISCARD)) 9765328e635SEric Sandeen seq_puts(seq, ",discard"); 9775328e635SEric Sandeen 978e3bb52aeSEric Sandeen if (test_opt(sb, NOLOAD)) 979e3bb52aeSEric Sandeen seq_puts(seq, ",norecovery"); 980e3bb52aeSEric Sandeen 981744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) 982744692dcSJiaying Zhang seq_puts(seq, ",dioread_nolock"); 983744692dcSJiaying Zhang 984617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 9850b8e58a1SAndreas Dilger 986ac27a0ecSDave Kleikamp return 0; 987ac27a0ecSDave Kleikamp } 988ac27a0ecSDave Kleikamp 9891b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 9901b961ac0SChristoph Hellwig u64 ino, u32 generation) 991ac27a0ecSDave Kleikamp { 992ac27a0ecSDave Kleikamp struct inode *inode; 993ac27a0ecSDave Kleikamp 994617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 995ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 996617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 997ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 998ac27a0ecSDave Kleikamp 999ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1000ac27a0ecSDave Kleikamp * 1001617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1002ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1003ac27a0ecSDave Kleikamp * 1004ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1005ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1006ac27a0ecSDave Kleikamp */ 10071d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 10081d1fe1eeSDavid Howells if (IS_ERR(inode)) 10091d1fe1eeSDavid Howells return ERR_CAST(inode); 10101d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1011ac27a0ecSDave Kleikamp iput(inode); 1012ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1013ac27a0ecSDave Kleikamp } 10141b961ac0SChristoph Hellwig 10151b961ac0SChristoph Hellwig return inode; 1016ac27a0ecSDave Kleikamp } 10171b961ac0SChristoph Hellwig 10181b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10191b961ac0SChristoph Hellwig int fh_len, int fh_type) 10201b961ac0SChristoph Hellwig { 10211b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10221b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10231b961ac0SChristoph Hellwig } 10241b961ac0SChristoph Hellwig 10251b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10261b961ac0SChristoph Hellwig int fh_len, int fh_type) 10271b961ac0SChristoph Hellwig { 10281b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10291b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1030ac27a0ecSDave Kleikamp } 1031ac27a0ecSDave Kleikamp 1032c39a7f84SToshiyuki Okajima /* 1033c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1034c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1035c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1036c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1037c39a7f84SToshiyuki Okajima */ 10380b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10390b8e58a1SAndreas Dilger gfp_t wait) 1040c39a7f84SToshiyuki Okajima { 1041c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1042c39a7f84SToshiyuki Okajima 1043c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1044c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1045c39a7f84SToshiyuki Okajima return 0; 1046c39a7f84SToshiyuki Okajima if (journal) 1047c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1048c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1049c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1050c39a7f84SToshiyuki Okajima } 1051c39a7f84SToshiyuki Okajima 1052ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1053ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1054ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1055ac27a0ecSDave Kleikamp 1056617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1057617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1058617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1059617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1060617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 10616f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 10626f28e087SJan Kara char *path, int remount); 1063617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1064617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1065ac27a0ecSDave Kleikamp size_t len, loff_t off); 1066617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1067ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1068ac27a0ecSDave Kleikamp 106961e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 1070a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 107160e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1072a9e7f447SDmitry Monakhov #endif 1073617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1074617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1075617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1076617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1077a5b5ee32SJan Kara .write_info = ext4_write_info, 1078a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1079a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1080ac27a0ecSDave Kleikamp }; 1081ac27a0ecSDave Kleikamp 10820d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1083617ba13bSMingming Cao .quota_on = ext4_quota_on, 1084ac27a0ecSDave Kleikamp .quota_off = vfs_quota_off, 1085ac27a0ecSDave Kleikamp .quota_sync = vfs_quota_sync, 1086ac27a0ecSDave Kleikamp .get_info = vfs_get_dqinfo, 1087ac27a0ecSDave Kleikamp .set_info = vfs_set_dqinfo, 1088ac27a0ecSDave Kleikamp .get_dqblk = vfs_get_dqblk, 1089ac27a0ecSDave Kleikamp .set_dqblk = vfs_set_dqblk 1090ac27a0ecSDave Kleikamp }; 1091ac27a0ecSDave Kleikamp #endif 1092ac27a0ecSDave Kleikamp 1093ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1094617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1095617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1096617ba13bSMingming Cao .write_inode = ext4_write_inode, 1097617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 1098617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 1099617ba13bSMingming Cao .put_super = ext4_put_super, 1100617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1101c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1102c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1103617ba13bSMingming Cao .statfs = ext4_statfs, 1104617ba13bSMingming Cao .remount_fs = ext4_remount, 1105617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 1106617ba13bSMingming Cao .show_options = ext4_show_options, 1107ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1108617ba13bSMingming Cao .quota_read = ext4_quota_read, 1109617ba13bSMingming Cao .quota_write = ext4_quota_write, 1110ac27a0ecSDave Kleikamp #endif 1111c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1112ac27a0ecSDave Kleikamp }; 1113ac27a0ecSDave Kleikamp 11149ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 11159ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 11169ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 11179ca92389STheodore Ts'o .write_inode = ext4_write_inode, 11189ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 11199ca92389STheodore Ts'o .delete_inode = ext4_delete_inode, 11209ca92389STheodore Ts'o .write_super = ext4_write_super, 11219ca92389STheodore Ts'o .put_super = ext4_put_super, 11229ca92389STheodore Ts'o .statfs = ext4_statfs, 11239ca92389STheodore Ts'o .remount_fs = ext4_remount, 11249ca92389STheodore Ts'o .clear_inode = ext4_clear_inode, 11259ca92389STheodore Ts'o .show_options = ext4_show_options, 11269ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 11279ca92389STheodore Ts'o .quota_read = ext4_quota_read, 11289ca92389STheodore Ts'o .quota_write = ext4_quota_write, 11299ca92389STheodore Ts'o #endif 11309ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 11319ca92389STheodore Ts'o }; 11329ca92389STheodore Ts'o 113339655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11341b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11351b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1136617ba13bSMingming Cao .get_parent = ext4_get_parent, 1137ac27a0ecSDave Kleikamp }; 1138ac27a0ecSDave Kleikamp 1139ac27a0ecSDave Kleikamp enum { 1140ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1141ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 114201436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1143ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 114406705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 114530773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1146c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1147818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1148ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1149296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1150ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11515a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 11525a20bdfcSJan Kara Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, 11535a20bdfcSJan Kara Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, 115401436ef2STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, 11556fd058f7STheodore Ts'o Opt_block_validity, Opt_noblock_validity, 11565328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1157744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 11585328e635SEric Sandeen Opt_discard, Opt_nodiscard, 1159ac27a0ecSDave Kleikamp }; 1160ac27a0ecSDave Kleikamp 1161a447c093SSteven Whitehouse static const match_table_t tokens = { 1162ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1163ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1164ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1165ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1166ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1167ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1168ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1169ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1170ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1171ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1172ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1173ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1174ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1175ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1176ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1177ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1178ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1179ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1180ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1181ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1182ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1183e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 1184ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1185ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1186ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 118730773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 118830773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1189ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1190ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1191818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1192818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1193ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1194ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1195ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1196ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 11975bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 11985bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1199ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1200ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1201ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1202ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1203ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1204ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12055a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1206ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1207ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1208ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1209ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1210ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 121106705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 121206705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 121325ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1214c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1215ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 121664769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1217dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 12186fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12196fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1220240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1221b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1222afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 122306705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 122406705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1225744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1226744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12275328e635SEric Sandeen {Opt_discard, "discard"}, 12285328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1229f3f12faaSJosef Bacik {Opt_err, NULL}, 1230ac27a0ecSDave Kleikamp }; 1231ac27a0ecSDave Kleikamp 1232617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1233ac27a0ecSDave Kleikamp { 1234617ba13bSMingming Cao ext4_fsblk_t sb_block; 1235ac27a0ecSDave Kleikamp char *options = (char *) *data; 1236ac27a0ecSDave Kleikamp 1237ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1238ac27a0ecSDave Kleikamp return 1; /* Default location */ 12390b8e58a1SAndreas Dilger 1240ac27a0ecSDave Kleikamp options += 3; 12410b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1242ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1243ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12444776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1245ac27a0ecSDave Kleikamp (char *) *data); 1246ac27a0ecSDave Kleikamp return 1; 1247ac27a0ecSDave Kleikamp } 1248ac27a0ecSDave Kleikamp if (*options == ',') 1249ac27a0ecSDave Kleikamp options++; 1250ac27a0ecSDave Kleikamp *data = (void *) options; 12510b8e58a1SAndreas Dilger 1252ac27a0ecSDave Kleikamp return sb_block; 1253ac27a0ecSDave Kleikamp } 1254ac27a0ecSDave Kleikamp 1255b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1256437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1257437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1258b3881f74STheodore Ts'o 125956c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 126056c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 126156c50f11SDmitry Monakhov { 126256c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 126356c50f11SDmitry Monakhov char *qname; 126456c50f11SDmitry Monakhov 126556c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 126656c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 126756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 126856c50f11SDmitry Monakhov "Cannot change journaled " 126956c50f11SDmitry Monakhov "quota options when quota turned on"); 127056c50f11SDmitry Monakhov return 0; 127156c50f11SDmitry Monakhov } 127256c50f11SDmitry Monakhov qname = match_strdup(args); 127356c50f11SDmitry Monakhov if (!qname) { 127456c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 127556c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 127656c50f11SDmitry Monakhov return 0; 127756c50f11SDmitry Monakhov } 127856c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 127956c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 128056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 128156c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 128256c50f11SDmitry Monakhov kfree(qname); 128356c50f11SDmitry Monakhov return 0; 128456c50f11SDmitry Monakhov } 128556c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 128656c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 128756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 128856c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 128956c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 129056c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 129156c50f11SDmitry Monakhov return 0; 129256c50f11SDmitry Monakhov } 129356c50f11SDmitry Monakhov set_opt(sbi->s_mount_opt, QUOTA); 129456c50f11SDmitry Monakhov return 1; 129556c50f11SDmitry Monakhov } 129656c50f11SDmitry Monakhov 129756c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 129856c50f11SDmitry Monakhov { 129956c50f11SDmitry Monakhov 130056c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 130156c50f11SDmitry Monakhov 130256c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 130356c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 130456c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 130556c50f11SDmitry Monakhov " when quota turned on"); 130656c50f11SDmitry Monakhov return 0; 130756c50f11SDmitry Monakhov } 130856c50f11SDmitry Monakhov /* 130956c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 131056c50f11SDmitry Monakhov * to be correct 131156c50f11SDmitry Monakhov */ 131256c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 131356c50f11SDmitry Monakhov return 1; 131456c50f11SDmitry Monakhov } 131556c50f11SDmitry Monakhov #endif 131656c50f11SDmitry Monakhov 1317ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1318c3191067STheodore Ts'o unsigned long *journal_devnum, 1319b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1320617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1321ac27a0ecSDave Kleikamp { 1322617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1323ac27a0ecSDave Kleikamp char *p; 1324ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1325ac27a0ecSDave Kleikamp int data_opt = 0; 1326ac27a0ecSDave Kleikamp int option; 1327ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 132856c50f11SDmitry Monakhov int qfmt; 1329ac27a0ecSDave Kleikamp #endif 1330ac27a0ecSDave Kleikamp 1331ac27a0ecSDave Kleikamp if (!options) 1332ac27a0ecSDave Kleikamp return 1; 1333ac27a0ecSDave Kleikamp 1334ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1335ac27a0ecSDave Kleikamp int token; 1336ac27a0ecSDave Kleikamp if (!*p) 1337ac27a0ecSDave Kleikamp continue; 1338ac27a0ecSDave Kleikamp 133915121c18SEric Sandeen /* 134015121c18SEric Sandeen * Initialize args struct so we know whether arg was 134115121c18SEric Sandeen * found; some options take optional arguments. 134215121c18SEric Sandeen */ 134315121c18SEric Sandeen args[0].to = args[0].from = 0; 1344ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1345ac27a0ecSDave Kleikamp switch (token) { 1346ac27a0ecSDave Kleikamp case Opt_bsd_df: 1347437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1348ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, MINIX_DF); 1349ac27a0ecSDave Kleikamp break; 1350ac27a0ecSDave Kleikamp case Opt_minix_df: 1351437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1352ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, MINIX_DF); 1353437ca0fdSDmitry Monakhov 1354ac27a0ecSDave Kleikamp break; 1355ac27a0ecSDave Kleikamp case Opt_grpid: 1356437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1357ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1358437ca0fdSDmitry Monakhov 1359ac27a0ecSDave Kleikamp break; 1360ac27a0ecSDave Kleikamp case Opt_nogrpid: 1361437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1362ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPID); 1363437ca0fdSDmitry Monakhov 1364ac27a0ecSDave Kleikamp break; 1365ac27a0ecSDave Kleikamp case Opt_resuid: 1366ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1367ac27a0ecSDave Kleikamp return 0; 1368ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1369ac27a0ecSDave Kleikamp break; 1370ac27a0ecSDave Kleikamp case Opt_resgid: 1371ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1372ac27a0ecSDave Kleikamp return 0; 1373ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1374ac27a0ecSDave Kleikamp break; 1375ac27a0ecSDave Kleikamp case Opt_sb: 1376ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1377ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1378ac27a0ecSDave Kleikamp break; 1379ac27a0ecSDave Kleikamp case Opt_err_panic: 1380ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1381ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1382ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1383ac27a0ecSDave Kleikamp break; 1384ac27a0ecSDave Kleikamp case Opt_err_ro: 1385ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1386ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1387ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1388ac27a0ecSDave Kleikamp break; 1389ac27a0ecSDave Kleikamp case Opt_err_cont: 1390ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1391ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1392ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_CONT); 1393ac27a0ecSDave Kleikamp break; 1394ac27a0ecSDave Kleikamp case Opt_nouid32: 1395ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 1396ac27a0ecSDave Kleikamp break; 1397ac27a0ecSDave Kleikamp case Opt_debug: 1398ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1399ac27a0ecSDave Kleikamp break; 1400ac27a0ecSDave Kleikamp case Opt_oldalloc: 1401ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, OLDALLOC); 1402ac27a0ecSDave Kleikamp break; 1403ac27a0ecSDave Kleikamp case Opt_orlov: 1404ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, OLDALLOC); 1405ac27a0ecSDave Kleikamp break; 140603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1407ac27a0ecSDave Kleikamp case Opt_user_xattr: 1408ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 1409ac27a0ecSDave Kleikamp break; 1410ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1411ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, XATTR_USER); 1412ac27a0ecSDave Kleikamp break; 1413ac27a0ecSDave Kleikamp #else 1414ac27a0ecSDave Kleikamp case Opt_user_xattr: 1415ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1416b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1417ac27a0ecSDave Kleikamp break; 1418ac27a0ecSDave Kleikamp #endif 141903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1420ac27a0ecSDave Kleikamp case Opt_acl: 1421ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1422ac27a0ecSDave Kleikamp break; 1423ac27a0ecSDave Kleikamp case Opt_noacl: 1424ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1425ac27a0ecSDave Kleikamp break; 1426ac27a0ecSDave Kleikamp #else 1427ac27a0ecSDave Kleikamp case Opt_acl: 1428ac27a0ecSDave Kleikamp case Opt_noacl: 1429b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1430ac27a0ecSDave Kleikamp break; 1431ac27a0ecSDave Kleikamp #endif 1432ac27a0ecSDave Kleikamp case Opt_journal_update: 1433ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1434ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1435ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1436ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1437ac27a0ecSDave Kleikamp journal file. */ 1438ac27a0ecSDave Kleikamp if (is_remount) { 1439b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1440b31e1552SEric Sandeen "Cannot specify journal on remount"); 1441ac27a0ecSDave Kleikamp return 0; 1442ac27a0ecSDave Kleikamp } 1443ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); 1444ac27a0ecSDave Kleikamp break; 1445ac27a0ecSDave Kleikamp case Opt_journal_dev: 1446ac27a0ecSDave Kleikamp if (is_remount) { 1447b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1448b31e1552SEric Sandeen "Cannot specify journal on remount"); 1449ac27a0ecSDave Kleikamp return 0; 1450ac27a0ecSDave Kleikamp } 1451ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1452ac27a0ecSDave Kleikamp return 0; 1453ac27a0ecSDave Kleikamp *journal_devnum = option; 1454ac27a0ecSDave Kleikamp break; 1455818d276cSGirish Shilamkar case Opt_journal_checksum: 1456d4da6c9cSLinus Torvalds set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1457d4da6c9cSLinus Torvalds break; 1458818d276cSGirish Shilamkar case Opt_journal_async_commit: 1459818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1460d4da6c9cSLinus Torvalds set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1461818d276cSGirish Shilamkar break; 1462ac27a0ecSDave Kleikamp case Opt_noload: 1463ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOLOAD); 1464ac27a0ecSDave Kleikamp break; 1465ac27a0ecSDave Kleikamp case Opt_commit: 1466ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1467ac27a0ecSDave Kleikamp return 0; 1468ac27a0ecSDave Kleikamp if (option < 0) 1469ac27a0ecSDave Kleikamp return 0; 1470ac27a0ecSDave Kleikamp if (option == 0) 1471cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1472ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1473ac27a0ecSDave Kleikamp break; 147430773840STheodore Ts'o case Opt_max_batch_time: 147530773840STheodore Ts'o if (match_int(&args[0], &option)) 147630773840STheodore Ts'o return 0; 147730773840STheodore Ts'o if (option < 0) 147830773840STheodore Ts'o return 0; 147930773840STheodore Ts'o if (option == 0) 148030773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 148130773840STheodore Ts'o sbi->s_max_batch_time = option; 148230773840STheodore Ts'o break; 148330773840STheodore Ts'o case Opt_min_batch_time: 148430773840STheodore Ts'o if (match_int(&args[0], &option)) 148530773840STheodore Ts'o return 0; 148630773840STheodore Ts'o if (option < 0) 148730773840STheodore Ts'o return 0; 148830773840STheodore Ts'o sbi->s_min_batch_time = option; 148930773840STheodore Ts'o break; 1490ac27a0ecSDave Kleikamp case Opt_data_journal: 1491617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1492ac27a0ecSDave Kleikamp goto datacheck; 1493ac27a0ecSDave Kleikamp case Opt_data_ordered: 1494617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1495ac27a0ecSDave Kleikamp goto datacheck; 1496ac27a0ecSDave Kleikamp case Opt_data_writeback: 1497617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1498ac27a0ecSDave Kleikamp datacheck: 1499ac27a0ecSDave Kleikamp if (is_remount) { 1500482a7425SDmitry Monakhov if (test_opt(sb, DATA_FLAGS) != data_opt) { 1501b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1502b31e1552SEric Sandeen "Cannot change data mode on remount"); 1503ac27a0ecSDave Kleikamp return 0; 1504ac27a0ecSDave Kleikamp } 1505ac27a0ecSDave Kleikamp } else { 1506482a7425SDmitry Monakhov clear_opt(sbi->s_mount_opt, DATA_FLAGS); 1507ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1508ac27a0ecSDave Kleikamp } 1509ac27a0ecSDave Kleikamp break; 15105bf5683aSHidehiro Kawai case Opt_data_err_abort: 15115bf5683aSHidehiro Kawai set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 15125bf5683aSHidehiro Kawai break; 15135bf5683aSHidehiro Kawai case Opt_data_err_ignore: 15145bf5683aSHidehiro Kawai clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 15155bf5683aSHidehiro Kawai break; 1516ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1517ac27a0ecSDave Kleikamp case Opt_usrjquota: 151856c50f11SDmitry Monakhov if (!set_qf_name(sb, USRQUOTA, &args[0])) 151956c50f11SDmitry Monakhov return 0; 152056c50f11SDmitry Monakhov break; 1521ac27a0ecSDave Kleikamp case Opt_grpjquota: 152256c50f11SDmitry Monakhov if (!set_qf_name(sb, GRPQUOTA, &args[0])) 1523ac27a0ecSDave Kleikamp return 0; 1524ac27a0ecSDave Kleikamp break; 1525ac27a0ecSDave Kleikamp case Opt_offusrjquota: 152656c50f11SDmitry Monakhov if (!clear_qf_name(sb, USRQUOTA)) 1527ac27a0ecSDave Kleikamp return 0; 1528ac27a0ecSDave Kleikamp break; 152956c50f11SDmitry Monakhov case Opt_offgrpjquota: 153056c50f11SDmitry Monakhov if (!clear_qf_name(sb, GRPQUOTA)) 153156c50f11SDmitry Monakhov return 0; 153256c50f11SDmitry Monakhov break; 153356c50f11SDmitry Monakhov 1534ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1535dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1536dfc5d03fSJan Kara goto set_qf_format; 1537ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1538dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 15395a20bdfcSJan Kara goto set_qf_format; 15405a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 15415a20bdfcSJan Kara qfmt = QFMT_VFS_V1; 1542dfc5d03fSJan Kara set_qf_format: 154317bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1544dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1545b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1546dfc5d03fSJan Kara "journaled quota options when " 1547b31e1552SEric Sandeen "quota turned on"); 1548dfc5d03fSJan Kara return 0; 1549dfc5d03fSJan Kara } 1550dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1551ac27a0ecSDave Kleikamp break; 1552ac27a0ecSDave Kleikamp case Opt_quota: 1553ac27a0ecSDave Kleikamp case Opt_usrquota: 1554ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1555ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1556ac27a0ecSDave Kleikamp break; 1557ac27a0ecSDave Kleikamp case Opt_grpquota: 1558ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1559ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1560ac27a0ecSDave Kleikamp break; 1561ac27a0ecSDave Kleikamp case Opt_noquota: 156217bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1563b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1564b31e1552SEric Sandeen "options when quota turned on"); 1565ac27a0ecSDave Kleikamp return 0; 1566ac27a0ecSDave Kleikamp } 1567ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1568ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1569ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1570ac27a0ecSDave Kleikamp break; 1571ac27a0ecSDave Kleikamp #else 1572ac27a0ecSDave Kleikamp case Opt_quota: 1573ac27a0ecSDave Kleikamp case Opt_usrquota: 1574ac27a0ecSDave Kleikamp case Opt_grpquota: 1575b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1576b31e1552SEric Sandeen "quota options not supported"); 1577cd59e7b9SJan Kara break; 1578ac27a0ecSDave Kleikamp case Opt_usrjquota: 1579ac27a0ecSDave Kleikamp case Opt_grpjquota: 1580ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1581ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1582ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1583ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 15845a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 1585b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1586b31e1552SEric Sandeen "journaled quota options not supported"); 1587ac27a0ecSDave Kleikamp break; 1588ac27a0ecSDave Kleikamp case Opt_noquota: 1589ac27a0ecSDave Kleikamp break; 1590ac27a0ecSDave Kleikamp #endif 1591ac27a0ecSDave Kleikamp case Opt_abort: 15924ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1593ac27a0ecSDave Kleikamp break; 159406705bffSTheodore Ts'o case Opt_nobarrier: 159506705bffSTheodore Ts'o clear_opt(sbi->s_mount_opt, BARRIER); 159606705bffSTheodore Ts'o break; 1597ac27a0ecSDave Kleikamp case Opt_barrier: 159815121c18SEric Sandeen if (args[0].from) { 159915121c18SEric Sandeen if (match_int(&args[0], &option)) 160015121c18SEric Sandeen return 0; 160115121c18SEric Sandeen } else 160215121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1603ac27a0ecSDave Kleikamp if (option) 1604ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1605ac27a0ecSDave Kleikamp else 1606ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1607ac27a0ecSDave Kleikamp break; 1608ac27a0ecSDave Kleikamp case Opt_ignore: 1609ac27a0ecSDave Kleikamp break; 1610ac27a0ecSDave Kleikamp case Opt_resize: 1611ac27a0ecSDave Kleikamp if (!is_remount) { 1612b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1613b31e1552SEric Sandeen "resize option only available " 1614b31e1552SEric Sandeen "for remount"); 1615ac27a0ecSDave Kleikamp return 0; 1616ac27a0ecSDave Kleikamp } 1617ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1618ac27a0ecSDave Kleikamp return 0; 1619ac27a0ecSDave Kleikamp *n_blocks_count = option; 1620ac27a0ecSDave Kleikamp break; 1621ac27a0ecSDave Kleikamp case Opt_nobh: 1622ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1623ac27a0ecSDave Kleikamp break; 1624ac27a0ecSDave Kleikamp case Opt_bh: 1625ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1626ac27a0ecSDave Kleikamp break; 162725ec56b5SJean Noel Cordenner case Opt_i_version: 162825ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 162925ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 163025ec56b5SJean Noel Cordenner break; 1631dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1632dd919b98SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 1633dd919b98SAneesh Kumar K.V break; 1634c9de560dSAlex Tomas case Opt_stripe: 1635c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1636c9de560dSAlex Tomas return 0; 1637c9de560dSAlex Tomas if (option < 0) 1638c9de560dSAlex Tomas return 0; 1639c9de560dSAlex Tomas sbi->s_stripe = option; 1640c9de560dSAlex Tomas break; 164164769240SAlex Tomas case Opt_delalloc: 164264769240SAlex Tomas set_opt(sbi->s_mount_opt, DELALLOC); 164364769240SAlex Tomas break; 16446fd058f7STheodore Ts'o case Opt_block_validity: 16456fd058f7STheodore Ts'o set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 16466fd058f7STheodore Ts'o break; 16476fd058f7STheodore Ts'o case Opt_noblock_validity: 16486fd058f7STheodore Ts'o clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 16496fd058f7STheodore Ts'o break; 1650240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1651240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1652240799cdSTheodore Ts'o return 0; 1653240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1654240799cdSTheodore Ts'o return 0; 1655f7c43950STheodore Ts'o if (!is_power_of_2(option)) { 1656b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1657b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1658b31e1552SEric Sandeen " must be a power of 2"); 16593197ebdbSTheodore Ts'o return 0; 16603197ebdbSTheodore Ts'o } 1661240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1662240799cdSTheodore Ts'o break; 1663b3881f74STheodore Ts'o case Opt_journal_ioprio: 1664b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1665b3881f74STheodore Ts'o return 0; 1666b3881f74STheodore Ts'o if (option < 0 || option > 7) 1667b3881f74STheodore Ts'o break; 1668b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1669b3881f74STheodore Ts'o option); 1670b3881f74STheodore Ts'o break; 167106705bffSTheodore Ts'o case Opt_noauto_da_alloc: 167206705bffSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 167306705bffSTheodore Ts'o break; 1674afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 167515121c18SEric Sandeen if (args[0].from) { 167615121c18SEric Sandeen if (match_int(&args[0], &option)) 167715121c18SEric Sandeen return 0; 167815121c18SEric Sandeen } else 167915121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1680afd4672dSTheodore Ts'o if (option) 1681afd4672dSTheodore Ts'o clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); 1682afd4672dSTheodore Ts'o else 1683afd4672dSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 1684afd4672dSTheodore Ts'o break; 16855328e635SEric Sandeen case Opt_discard: 16865328e635SEric Sandeen set_opt(sbi->s_mount_opt, DISCARD); 16875328e635SEric Sandeen break; 16885328e635SEric Sandeen case Opt_nodiscard: 16895328e635SEric Sandeen clear_opt(sbi->s_mount_opt, DISCARD); 16905328e635SEric Sandeen break; 1691744692dcSJiaying Zhang case Opt_dioread_nolock: 1692744692dcSJiaying Zhang set_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 1693744692dcSJiaying Zhang break; 1694744692dcSJiaying Zhang case Opt_dioread_lock: 1695744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 1696744692dcSJiaying Zhang break; 1697ac27a0ecSDave Kleikamp default: 1698b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1699b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1700b31e1552SEric Sandeen "or missing value", p); 1701ac27a0ecSDave Kleikamp return 0; 1702ac27a0ecSDave Kleikamp } 1703ac27a0ecSDave Kleikamp } 1704ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1705ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1706482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1707ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1708ac27a0ecSDave Kleikamp 1709482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1710ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1711ac27a0ecSDave Kleikamp 171256c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1713b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1714b31e1552SEric Sandeen "format mixing"); 1715ac27a0ecSDave Kleikamp return 0; 1716ac27a0ecSDave Kleikamp } 1717ac27a0ecSDave Kleikamp 1718ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1719b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1720b31e1552SEric Sandeen "not specified"); 1721ac27a0ecSDave Kleikamp return 0; 1722ac27a0ecSDave Kleikamp } 1723ac27a0ecSDave Kleikamp } else { 1724ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1725b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 17262c8be6b2SJan Kara "specified with no journaling " 1727b31e1552SEric Sandeen "enabled"); 1728ac27a0ecSDave Kleikamp return 0; 1729ac27a0ecSDave Kleikamp } 1730ac27a0ecSDave Kleikamp } 1731ac27a0ecSDave Kleikamp #endif 1732ac27a0ecSDave Kleikamp return 1; 1733ac27a0ecSDave Kleikamp } 1734ac27a0ecSDave Kleikamp 1735617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1736ac27a0ecSDave Kleikamp int read_only) 1737ac27a0ecSDave Kleikamp { 1738617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1739ac27a0ecSDave Kleikamp int res = 0; 1740ac27a0ecSDave Kleikamp 1741617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1742b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1743b31e1552SEric Sandeen "forcing read-only mode"); 1744ac27a0ecSDave Kleikamp res = MS_RDONLY; 1745ac27a0ecSDave Kleikamp } 1746ac27a0ecSDave Kleikamp if (read_only) 1747ac27a0ecSDave Kleikamp return res; 1748617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1749b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1750b31e1552SEric Sandeen "running e2fsck is recommended"); 1751617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1752b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1753b31e1552SEric Sandeen "warning: mounting fs with errors, " 1754b31e1552SEric Sandeen "running e2fsck is recommended"); 1755ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1756ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1757ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1758b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1759b31e1552SEric Sandeen "warning: maximal mount count reached, " 1760b31e1552SEric Sandeen "running e2fsck is recommended"); 1761ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1762ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1763ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1764b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1765b31e1552SEric Sandeen "warning: checktime reached, " 1766b31e1552SEric Sandeen "running e2fsck is recommended"); 17670390131bSFrank Mayhar if (!sbi->s_journal) 1768216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1769ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1770617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1771e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1772ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1773617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 17740390131bSFrank Mayhar if (sbi->s_journal) 1775617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1776ac27a0ecSDave Kleikamp 1777e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1778ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1779a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 17807f4520ccSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x]\n", 1781ac27a0ecSDave Kleikamp sb->s_blocksize, 1782ac27a0ecSDave Kleikamp sbi->s_groups_count, 1783617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1784617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1785ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1786ac27a0ecSDave Kleikamp 1787ac27a0ecSDave Kleikamp return res; 1788ac27a0ecSDave Kleikamp } 1789ac27a0ecSDave Kleikamp 1790772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1791772cb7c8SJose R. Santos { 1792772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1793772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1794772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1795772cb7c8SJose R. Santos ext4_group_t flex_group; 1796772cb7c8SJose R. Santos int groups_per_flex = 0; 1797c5ca7c76STheodore Ts'o size_t size; 1798772cb7c8SJose R. Santos int i; 1799772cb7c8SJose R. Santos 1800503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1801503358aeSTheodore Ts'o groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1802503358aeSTheodore Ts'o 1803503358aeSTheodore Ts'o if (groups_per_flex < 2) { 1804772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1805772cb7c8SJose R. Santos return 1; 1806772cb7c8SJose R. Santos } 1807772cb7c8SJose R. Santos 1808c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1809c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1810d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1811d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1812c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 1813c5ca7c76STheodore Ts'o sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); 1814c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 1815c5ca7c76STheodore Ts'o sbi->s_flex_groups = vmalloc(size); 1816c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) 1817c5ca7c76STheodore Ts'o memset(sbi->s_flex_groups, 0, size); 1818c5ca7c76STheodore Ts'o } 1819772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1820b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory for " 1821b31e1552SEric Sandeen "%u flex groups", flex_group_count); 1822772cb7c8SJose R. Santos goto failed; 1823772cb7c8SJose R. Santos } 1824772cb7c8SJose R. Santos 1825772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 182688b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1827772cb7c8SJose R. Santos 1828772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 18297ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 18307ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 18317ad9bb65STheodore Ts'o atomic_add(ext4_free_blks_count(sb, gdp), 18327ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_blocks); 18337ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 18347ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1835772cb7c8SJose R. Santos } 1836772cb7c8SJose R. Santos 1837772cb7c8SJose R. Santos return 1; 1838772cb7c8SJose R. Santos failed: 1839772cb7c8SJose R. Santos return 0; 1840772cb7c8SJose R. Santos } 1841772cb7c8SJose R. Santos 1842717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1843717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1844717d50e4SAndreas Dilger { 1845717d50e4SAndreas Dilger __u16 crc = 0; 1846717d50e4SAndreas Dilger 1847717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1848717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1849717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1850717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1851717d50e4SAndreas Dilger 1852717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1853717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1854717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1855717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1856717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1857717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1858717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1859717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1860717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1861717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1862717d50e4SAndreas Dilger offset); 1863717d50e4SAndreas Dilger } 1864717d50e4SAndreas Dilger 1865717d50e4SAndreas Dilger return cpu_to_le16(crc); 1866717d50e4SAndreas Dilger } 1867717d50e4SAndreas Dilger 1868717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1869717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1870717d50e4SAndreas Dilger { 1871717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1872717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1873717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1874717d50e4SAndreas Dilger return 0; 1875717d50e4SAndreas Dilger 1876717d50e4SAndreas Dilger return 1; 1877717d50e4SAndreas Dilger } 1878717d50e4SAndreas Dilger 1879ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1880617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1881ac27a0ecSDave Kleikamp { 1882617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1883617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1884617ba13bSMingming Cao ext4_fsblk_t last_block; 1885bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1886bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1887bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1888ce421581SJose R. Santos int flexbg_flag = 0; 1889fd2d4291SAvantika Mathur ext4_group_t i; 1890ac27a0ecSDave Kleikamp 1891ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1892ce421581SJose R. Santos flexbg_flag = 1; 1893ce421581SJose R. Santos 1894617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 1895ac27a0ecSDave Kleikamp 1896197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1897197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1898197cd65aSAkinobu Mita 1899ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1900bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1901ac27a0ecSDave Kleikamp else 1902ac27a0ecSDave Kleikamp last_block = first_block + 1903617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1904ac27a0ecSDave Kleikamp 19058fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 19062b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 1907b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1908a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 1909b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 1910ac27a0ecSDave Kleikamp return 0; 1911ac27a0ecSDave Kleikamp } 19128fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 19132b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 1914b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1915a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 1916b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 1917ac27a0ecSDave Kleikamp return 0; 1918ac27a0ecSDave Kleikamp } 19198fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1920bd81d8eeSLaurent Vivier if (inode_table < first_block || 19212b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 1922b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1923a9df9a49STheodore Ts'o "Inode table for group %u not in group " 1924b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 1925ac27a0ecSDave Kleikamp return 0; 1926ac27a0ecSDave Kleikamp } 1927955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 1928717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1929b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1930b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 1931fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1932fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 19337ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 1934955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1935717d50e4SAndreas Dilger return 0; 1936717d50e4SAndreas Dilger } 19377ee1ec4cSLi Zefan } 1938955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1939ce421581SJose R. Santos if (!flexbg_flag) 1940617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 1941ac27a0ecSDave Kleikamp } 1942ac27a0ecSDave Kleikamp 1943bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1944617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 1945ac27a0ecSDave Kleikamp return 1; 1946ac27a0ecSDave Kleikamp } 1947ac27a0ecSDave Kleikamp 1948617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1949ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1950ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1951ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1952ac27a0ecSDave Kleikamp * 1953ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1954ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1955ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1956ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1957ac27a0ecSDave Kleikamp * 1958ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1959ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1960ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1961617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1962ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1963ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1964ac27a0ecSDave Kleikamp */ 1965617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 1966617ba13bSMingming Cao struct ext4_super_block *es) 1967ac27a0ecSDave Kleikamp { 1968ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1969ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1970ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1971ac27a0ecSDave Kleikamp int i; 1972ac27a0ecSDave Kleikamp #endif 1973ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1974ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1975ac27a0ecSDave Kleikamp return; 1976ac27a0ecSDave Kleikamp } 1977ac27a0ecSDave Kleikamp 1978a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1979b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 1980b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 1981a8f48a95SEric Sandeen return; 1982a8f48a95SEric Sandeen } 1983a8f48a95SEric Sandeen 1984617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1985ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1986ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1987ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1988ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1989ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1990ac27a0ecSDave Kleikamp return; 1991ac27a0ecSDave Kleikamp } 1992ac27a0ecSDave Kleikamp 1993ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1994b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 1995ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 1996ac27a0ecSDave Kleikamp } 1997ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1998ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 1999ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2000ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2001ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2002617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2003617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2004ac27a0ecSDave Kleikamp if (ret < 0) 2005b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2006b31e1552SEric Sandeen "Cannot turn on journaled " 2007b31e1552SEric Sandeen "quota: error %d", ret); 2008ac27a0ecSDave Kleikamp } 2009ac27a0ecSDave Kleikamp } 2010ac27a0ecSDave Kleikamp #endif 2011ac27a0ecSDave Kleikamp 2012ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2013ac27a0ecSDave Kleikamp struct inode *inode; 2014ac27a0ecSDave Kleikamp 201597bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 201697bd42b9SJosef Bacik if (IS_ERR(inode)) { 2017ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2018ac27a0ecSDave Kleikamp break; 2019ac27a0ecSDave Kleikamp } 2020ac27a0ecSDave Kleikamp 2021617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2022871a2931SChristoph Hellwig dquot_initialize(inode); 2023ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2024b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2025b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 202646e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2027e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2028ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2029617ba13bSMingming Cao ext4_truncate(inode); 2030ac27a0ecSDave Kleikamp nr_truncates++; 2031ac27a0ecSDave Kleikamp } else { 2032b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2033b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 203446e665e9SHarvey Harrison __func__, inode->i_ino); 2035ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2036ac27a0ecSDave Kleikamp inode->i_ino); 2037ac27a0ecSDave Kleikamp nr_orphans++; 2038ac27a0ecSDave Kleikamp } 2039ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2040ac27a0ecSDave Kleikamp } 2041ac27a0ecSDave Kleikamp 2042ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2043ac27a0ecSDave Kleikamp 2044ac27a0ecSDave Kleikamp if (nr_orphans) 2045b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2046b31e1552SEric Sandeen PLURAL(nr_orphans)); 2047ac27a0ecSDave Kleikamp if (nr_truncates) 2048b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2049b31e1552SEric Sandeen PLURAL(nr_truncates)); 2050ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2051ac27a0ecSDave Kleikamp /* Turn quotas off */ 2052ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2053ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 20546f28e087SJan Kara vfs_quota_off(sb, i, 0); 2055ac27a0ecSDave Kleikamp } 2056ac27a0ecSDave Kleikamp #endif 2057ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2058ac27a0ecSDave Kleikamp } 20590b8e58a1SAndreas Dilger 2060cd2291a4SEric Sandeen /* 2061cd2291a4SEric Sandeen * Maximal extent format file size. 2062cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2063cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2064cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2065cd2291a4SEric Sandeen * so that won't be a limiting factor. 2066cd2291a4SEric Sandeen * 2067cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2068cd2291a4SEric Sandeen */ 2069f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2070cd2291a4SEric Sandeen { 2071cd2291a4SEric Sandeen loff_t res; 2072cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2073cd2291a4SEric Sandeen 2074cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2075f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2076cd2291a4SEric Sandeen /* 207790c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2078cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2079cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2080cd2291a4SEric Sandeen */ 2081cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2082cd2291a4SEric Sandeen 2083cd2291a4SEric Sandeen /* total blocks in file system block size */ 2084cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2085cd2291a4SEric Sandeen upper_limit <<= blkbits; 2086cd2291a4SEric Sandeen } 2087cd2291a4SEric Sandeen 2088cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 2089cd2291a4SEric Sandeen res = 1LL << 32; 2090cd2291a4SEric Sandeen res <<= blkbits; 2091cd2291a4SEric Sandeen res -= 1; 2092cd2291a4SEric Sandeen 2093cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2094cd2291a4SEric Sandeen if (res > upper_limit) 2095cd2291a4SEric Sandeen res = upper_limit; 2096cd2291a4SEric Sandeen 2097cd2291a4SEric Sandeen return res; 2098cd2291a4SEric Sandeen } 2099ac27a0ecSDave Kleikamp 2100ac27a0ecSDave Kleikamp /* 2101cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 21020fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 21030fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2104ac27a0ecSDave Kleikamp */ 2105f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2106ac27a0ecSDave Kleikamp { 2107617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 21080fc1b451SAneesh Kumar K.V int meta_blocks; 21090fc1b451SAneesh Kumar K.V loff_t upper_limit; 21100b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 21110b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 21120b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 21130b8e58a1SAndreas Dilger * 21140b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 21150b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 21160fc1b451SAneesh Kumar K.V */ 21170fc1b451SAneesh Kumar K.V 2118f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 21190fc1b451SAneesh Kumar K.V /* 212090c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 21210b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 21220b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 21230fc1b451SAneesh Kumar K.V */ 21240fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 21250fc1b451SAneesh Kumar K.V 21260fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 21270fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 21280fc1b451SAneesh Kumar K.V 21290fc1b451SAneesh Kumar K.V } else { 21308180a562SAneesh Kumar K.V /* 21318180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 21328180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 21338180a562SAneesh Kumar K.V * represent total number of blocks in 21348180a562SAneesh Kumar K.V * file system block size 21358180a562SAneesh Kumar K.V */ 21360fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 21370fc1b451SAneesh Kumar K.V 21380fc1b451SAneesh Kumar K.V } 21390fc1b451SAneesh Kumar K.V 21400fc1b451SAneesh Kumar K.V /* indirect blocks */ 21410fc1b451SAneesh Kumar K.V meta_blocks = 1; 21420fc1b451SAneesh Kumar K.V /* double indirect blocks */ 21430fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 21440fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 21450fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 21460fc1b451SAneesh Kumar K.V 21470fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 21480fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2149ac27a0ecSDave Kleikamp 2150ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2151ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2152ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2153ac27a0ecSDave Kleikamp res <<= bits; 2154ac27a0ecSDave Kleikamp if (res > upper_limit) 2155ac27a0ecSDave Kleikamp res = upper_limit; 21560fc1b451SAneesh Kumar K.V 21570fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 21580fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 21590fc1b451SAneesh Kumar K.V 2160ac27a0ecSDave Kleikamp return res; 2161ac27a0ecSDave Kleikamp } 2162ac27a0ecSDave Kleikamp 2163617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 216470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2165ac27a0ecSDave Kleikamp { 2166617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2167fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2168ac27a0ecSDave Kleikamp int has_super = 0; 2169ac27a0ecSDave Kleikamp 2170ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2171ac27a0ecSDave Kleikamp 2172617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2173ac27a0ecSDave Kleikamp nr < first_meta_bg) 217470bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2175ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2176617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2177ac27a0ecSDave Kleikamp has_super = 1; 21780b8e58a1SAndreas Dilger 2179617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2180ac27a0ecSDave Kleikamp } 2181ac27a0ecSDave Kleikamp 2182c9de560dSAlex Tomas /** 2183c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2184c9de560dSAlex Tomas * @sbi: In memory super block info 2185c9de560dSAlex Tomas * 2186c9de560dSAlex Tomas * If we have specified it via mount option, then 2187c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2188c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2189c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2190c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2191c9de560dSAlex Tomas * 2192c9de560dSAlex Tomas */ 2193c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2194c9de560dSAlex Tomas { 2195c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2196c9de560dSAlex Tomas unsigned long stripe_width = 2197c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 2198c9de560dSAlex Tomas 2199c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 2200c9de560dSAlex Tomas return sbi->s_stripe; 2201c9de560dSAlex Tomas 2202c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 2203c9de560dSAlex Tomas return stripe_width; 2204c9de560dSAlex Tomas 2205c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 2206c9de560dSAlex Tomas return stride; 2207c9de560dSAlex Tomas 2208c9de560dSAlex Tomas return 0; 2209c9de560dSAlex Tomas } 2210ac27a0ecSDave Kleikamp 22113197ebdbSTheodore Ts'o /* sysfs supprt */ 22123197ebdbSTheodore Ts'o 22133197ebdbSTheodore Ts'o struct ext4_attr { 22143197ebdbSTheodore Ts'o struct attribute attr; 22153197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 22163197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 22173197ebdbSTheodore Ts'o const char *, size_t); 22183197ebdbSTheodore Ts'o int offset; 22193197ebdbSTheodore Ts'o }; 22203197ebdbSTheodore Ts'o 22213197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 22223197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 22233197ebdbSTheodore Ts'o { 22243197ebdbSTheodore Ts'o char *endp; 22253197ebdbSTheodore Ts'o 2226e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2227e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 22283197ebdbSTheodore Ts'o if (*endp || *value > max) 22293197ebdbSTheodore Ts'o return -EINVAL; 22303197ebdbSTheodore Ts'o 22313197ebdbSTheodore Ts'o return 0; 22323197ebdbSTheodore Ts'o } 22333197ebdbSTheodore Ts'o 22343197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 22353197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 22363197ebdbSTheodore Ts'o char *buf) 22373197ebdbSTheodore Ts'o { 22383197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 22393197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 22403197ebdbSTheodore Ts'o } 22413197ebdbSTheodore Ts'o 22423197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 22433197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 22443197ebdbSTheodore Ts'o { 22453197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 22463197ebdbSTheodore Ts'o 22473197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 22483197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 22493197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 22503197ebdbSTheodore Ts'o } 22513197ebdbSTheodore Ts'o 22523197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 22533197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 22543197ebdbSTheodore Ts'o { 22553197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 22563197ebdbSTheodore Ts'o 22573197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2258a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 22593197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2260a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 22613197ebdbSTheodore Ts'o } 22623197ebdbSTheodore Ts'o 22633197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 22643197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 22653197ebdbSTheodore Ts'o const char *buf, size_t count) 22663197ebdbSTheodore Ts'o { 22673197ebdbSTheodore Ts'o unsigned long t; 22683197ebdbSTheodore Ts'o 22693197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 22703197ebdbSTheodore Ts'o return -EINVAL; 22713197ebdbSTheodore Ts'o 2272f7c43950STheodore Ts'o if (!is_power_of_2(t)) 22733197ebdbSTheodore Ts'o return -EINVAL; 22743197ebdbSTheodore Ts'o 22753197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 22763197ebdbSTheodore Ts'o return count; 22773197ebdbSTheodore Ts'o } 22783197ebdbSTheodore Ts'o 22793197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 22803197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 22813197ebdbSTheodore Ts'o { 22823197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 22833197ebdbSTheodore Ts'o 22843197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 22853197ebdbSTheodore Ts'o } 22863197ebdbSTheodore Ts'o 22873197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 22883197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 22893197ebdbSTheodore Ts'o const char *buf, size_t count) 22903197ebdbSTheodore Ts'o { 22913197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 22923197ebdbSTheodore Ts'o unsigned long t; 22933197ebdbSTheodore Ts'o 22943197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 22953197ebdbSTheodore Ts'o return -EINVAL; 22963197ebdbSTheodore Ts'o *ui = t; 22973197ebdbSTheodore Ts'o return count; 22983197ebdbSTheodore Ts'o } 22993197ebdbSTheodore Ts'o 23003197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 23013197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 23023197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 23033197ebdbSTheodore Ts'o .show = _show, \ 23043197ebdbSTheodore Ts'o .store = _store, \ 23053197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 23063197ebdbSTheodore Ts'o } 23073197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 23083197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 23093197ebdbSTheodore Ts'o 23103197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 23113197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 23123197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 23133197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 23143197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 23153197ebdbSTheodore Ts'o 23163197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 23173197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 23183197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 23193197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 23203197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 232111013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 23223197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 23233197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 23243197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 23253197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 23263197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 23273197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 232855138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 23293197ebdbSTheodore Ts'o 23303197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 23313197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 23323197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 23333197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 23343197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 233511013911SAndreas Dilger ATTR_LIST(inode_goal), 23363197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 23373197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 23383197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 23393197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 23403197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 23413197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 234255138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 23433197ebdbSTheodore Ts'o NULL, 23443197ebdbSTheodore Ts'o }; 23453197ebdbSTheodore Ts'o 23463197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 23473197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 23483197ebdbSTheodore Ts'o { 23493197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 23503197ebdbSTheodore Ts'o s_kobj); 23513197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 23523197ebdbSTheodore Ts'o 23533197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 23543197ebdbSTheodore Ts'o } 23553197ebdbSTheodore Ts'o 23563197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 23573197ebdbSTheodore Ts'o struct attribute *attr, 23583197ebdbSTheodore Ts'o const char *buf, size_t len) 23593197ebdbSTheodore Ts'o { 23603197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 23613197ebdbSTheodore Ts'o s_kobj); 23623197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 23633197ebdbSTheodore Ts'o 23643197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 23653197ebdbSTheodore Ts'o } 23663197ebdbSTheodore Ts'o 23673197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 23683197ebdbSTheodore Ts'o { 23693197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 23703197ebdbSTheodore Ts'o s_kobj); 23713197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 23723197ebdbSTheodore Ts'o } 23733197ebdbSTheodore Ts'o 23743197ebdbSTheodore Ts'o 237552cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 23763197ebdbSTheodore Ts'o .show = ext4_attr_show, 23773197ebdbSTheodore Ts'o .store = ext4_attr_store, 23783197ebdbSTheodore Ts'o }; 23793197ebdbSTheodore Ts'o 23803197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 23813197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 23823197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 23833197ebdbSTheodore Ts'o .release = ext4_sb_release, 23843197ebdbSTheodore Ts'o }; 23853197ebdbSTheodore Ts'o 2386a13fb1a4SEric Sandeen /* 2387a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2388a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2389a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2390a13fb1a4SEric Sandeen * 0 if it cannot be. 2391a13fb1a4SEric Sandeen */ 2392a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2393a13fb1a4SEric Sandeen { 2394a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2395a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2396a13fb1a4SEric Sandeen "Couldn't mount because of " 2397a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2398a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2399a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2400a13fb1a4SEric Sandeen return 0; 2401a13fb1a4SEric Sandeen } 2402a13fb1a4SEric Sandeen 2403a13fb1a4SEric Sandeen if (readonly) 2404a13fb1a4SEric Sandeen return 1; 2405a13fb1a4SEric Sandeen 2406a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2407a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2408a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2409a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2410a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2411a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2412a13fb1a4SEric Sandeen return 0; 2413a13fb1a4SEric Sandeen } 2414a13fb1a4SEric Sandeen /* 2415a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2416a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2417a13fb1a4SEric Sandeen */ 2418a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2419a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2420a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2421a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2422a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2423a13fb1a4SEric Sandeen return 0; 2424a13fb1a4SEric Sandeen } 2425a13fb1a4SEric Sandeen } 2426a13fb1a4SEric Sandeen return 1; 2427a13fb1a4SEric Sandeen } 2428a13fb1a4SEric Sandeen 2429617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 24307477827fSAneesh Kumar K.V __releases(kernel_lock) 24317477827fSAneesh Kumar K.V __acquires(kernel_lock) 2432ac27a0ecSDave Kleikamp { 2433ac27a0ecSDave Kleikamp struct buffer_head *bh; 2434617ba13bSMingming Cao struct ext4_super_block *es = NULL; 2435617ba13bSMingming Cao struct ext4_sb_info *sbi; 2436617ba13bSMingming Cao ext4_fsblk_t block; 2437617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 243870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 2439ac27a0ecSDave Kleikamp unsigned long offset = 0; 2440ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 2441ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 2442ac27a0ecSDave Kleikamp struct inode *root; 24439f6200bbSTheodore Ts'o char *cp; 24440390131bSFrank Mayhar const char *descr; 24451d1fe1eeSDavid Howells int ret = -EINVAL; 2446ac27a0ecSDave Kleikamp int blocksize; 24474ec11028STheodore Ts'o unsigned int db_count; 24484ec11028STheodore Ts'o unsigned int i; 2449f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 2450bd81d8eeSLaurent Vivier __u64 blocks_count; 2451833f4077SPeter Zijlstra int err; 2452b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 2453ac27a0ecSDave Kleikamp 2454ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 2455ac27a0ecSDave Kleikamp if (!sbi) 2456ac27a0ecSDave Kleikamp return -ENOMEM; 2457705895b6SPekka Enberg 2458705895b6SPekka Enberg sbi->s_blockgroup_lock = 2459705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 2460705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 2461705895b6SPekka Enberg kfree(sbi); 2462705895b6SPekka Enberg return -ENOMEM; 2463705895b6SPekka Enberg } 2464ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 2465ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 2466617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 2467617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 2468240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 2469d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 2470afc32f7eSTheodore Ts'o sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, 2471afc32f7eSTheodore Ts'o sectors[1]); 2472ac27a0ecSDave Kleikamp 2473ac27a0ecSDave Kleikamp unlock_kernel(); 2474ac27a0ecSDave Kleikamp 24759f6200bbSTheodore Ts'o /* Cleanup superblock name */ 24769f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 24779f6200bbSTheodore Ts'o *cp = '!'; 24789f6200bbSTheodore Ts'o 2479617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 2480ac27a0ecSDave Kleikamp if (!blocksize) { 2481b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 2482ac27a0ecSDave Kleikamp goto out_fail; 2483ac27a0ecSDave Kleikamp } 2484ac27a0ecSDave Kleikamp 2485ac27a0ecSDave Kleikamp /* 2486617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 2487ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 2488ac27a0ecSDave Kleikamp */ 2489617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 249070bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 249170bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 2492ac27a0ecSDave Kleikamp } else { 249370bbb3e0SAndrew Morton logical_sb_block = sb_block; 2494ac27a0ecSDave Kleikamp } 2495ac27a0ecSDave Kleikamp 249670bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 2497b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 2498ac27a0ecSDave Kleikamp goto out_fail; 2499ac27a0ecSDave Kleikamp } 2500ac27a0ecSDave Kleikamp /* 2501ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 2502617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 2503ac27a0ecSDave Kleikamp */ 2504617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2505ac27a0ecSDave Kleikamp sbi->s_es = es; 2506ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 2507617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 2508617ba13bSMingming Cao goto cantfind_ext4; 2509afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 2510ac27a0ecSDave Kleikamp 2511ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 2512ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 2513617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 2514ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 2515437ca0fdSDmitry Monakhov if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { 2516437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", 2517437ca0fdSDmitry Monakhov "2.6.38"); 2518ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 2519437ca0fdSDmitry Monakhov } 2520617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 2521ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 252203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 2523617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 2524ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 25252e7842b8SHugh Dickins #endif 252603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 2527617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 2528ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 25292e7842b8SHugh Dickins #endif 2530617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 2531482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2532617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 2533482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, ORDERED_DATA); 2534617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 2535482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 2536ac27a0ecSDave Kleikamp 2537617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 2538ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 2539bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 2540ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 2541bb4f397aSAneesh Kumar K.V else 2542bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 2543ac27a0ecSDave Kleikamp 2544ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 2545ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 254630773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 254730773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 254830773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 2549ac27a0ecSDave Kleikamp 2550571640caSEric Sandeen set_opt(sbi->s_mount_opt, BARRIER); 2551ac27a0ecSDave Kleikamp 25521e2462f9SMingming Cao /* 2553dd919b98SAneesh Kumar K.V * enable delayed allocation by default 2554dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 2555dd919b98SAneesh Kumar K.V */ 2556ba69f9abSJan Kara if (!IS_EXT3_SB(sb)) 2557dd919b98SAneesh Kumar K.V set_opt(sbi->s_mount_opt, DELALLOC); 2558dd919b98SAneesh Kumar K.V 2559b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 2560b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 2561ac27a0ecSDave Kleikamp goto failed_mount; 2562ac27a0ecSDave Kleikamp 2563ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2564482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 2565ac27a0ecSDave Kleikamp 2566617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 2567617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 2568617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 2569617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 2570b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2571b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 2572b31e1552SEric Sandeen "running e2fsck is recommended"); 2573469108ffSTheodore Tso 2574469108ffSTheodore Tso /* 2575ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 2576ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 2577ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 2578ac27a0ecSDave Kleikamp */ 2579a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 2580ac27a0ecSDave Kleikamp goto failed_mount; 2581a13fb1a4SEric Sandeen 2582ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 2583ac27a0ecSDave Kleikamp 2584617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 2585617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 2586b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2587b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 2588ac27a0ecSDave Kleikamp goto failed_mount; 2589ac27a0ecSDave Kleikamp } 2590ac27a0ecSDave Kleikamp 2591ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 2592ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 2593ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 2594b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 2595ce40733cSAneesh Kumar K.V blocksize); 2596ac27a0ecSDave Kleikamp goto failed_mount; 2597ac27a0ecSDave Kleikamp } 2598ac27a0ecSDave Kleikamp 2599ac27a0ecSDave Kleikamp brelse(bh); 260070bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 260170bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 260270bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 2603ac27a0ecSDave Kleikamp if (!bh) { 2604b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2605b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 2606ac27a0ecSDave Kleikamp goto failed_mount; 2607ac27a0ecSDave Kleikamp } 2608617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 2609ac27a0ecSDave Kleikamp sbi->s_es = es; 2610617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 2611b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2612b31e1552SEric Sandeen "Magic mismatch, very weird!"); 2613ac27a0ecSDave Kleikamp goto failed_mount; 2614ac27a0ecSDave Kleikamp } 2615ac27a0ecSDave Kleikamp } 2616ac27a0ecSDave Kleikamp 2617a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2618a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 2619f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 2620f287a1a5STheodore Ts'o has_huge_files); 2621f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 2622ac27a0ecSDave Kleikamp 2623617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 2624617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 2625617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 2626ac27a0ecSDave Kleikamp } else { 2627ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2628ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2629617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 26301330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2631ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2632b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2633b31e1552SEric Sandeen "unsupported inode size: %d", 2634ac27a0ecSDave Kleikamp sbi->s_inode_size); 2635ac27a0ecSDave Kleikamp goto failed_mount; 2636ac27a0ecSDave Kleikamp } 2637ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2638ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2639ac27a0ecSDave Kleikamp } 26400b8e58a1SAndreas Dilger 26410d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 26420d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 26438fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 26440d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2645d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 2646b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2647b31e1552SEric Sandeen "unsupported descriptor size %lu", 26480d1ee42fSAlexandre Ratchov sbi->s_desc_size); 26490d1ee42fSAlexandre Ratchov goto failed_mount; 26500d1ee42fSAlexandre Ratchov } 26510d1ee42fSAlexandre Ratchov } else 26520d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 26530b8e58a1SAndreas Dilger 2654ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2655ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2656b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2657617ba13bSMingming Cao goto cantfind_ext4; 26580b8e58a1SAndreas Dilger 2659617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2660ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2661617ba13bSMingming Cao goto cantfind_ext4; 2662ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2663ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 26640d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2665ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2666ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2667e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2668e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 26690b8e58a1SAndreas Dilger 2670ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 2671ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2672ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2673f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 2674f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 2675f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2676f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 2677f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 2678f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 2679f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2680f99b2589STheodore Ts'o #else 2681f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 2682f99b2589STheodore Ts'o #endif 2683f99b2589STheodore Ts'o sb->s_dirt = 1; 2684f99b2589STheodore Ts'o } 2685ac27a0ecSDave Kleikamp 2686ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2687b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2688b31e1552SEric Sandeen "#blocks per group too big: %lu", 2689ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2690ac27a0ecSDave Kleikamp goto failed_mount; 2691ac27a0ecSDave Kleikamp } 2692ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2693b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2694b31e1552SEric Sandeen "#inodes per group too big: %lu", 2695ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2696ac27a0ecSDave Kleikamp goto failed_mount; 2697ac27a0ecSDave Kleikamp } 2698ac27a0ecSDave Kleikamp 2699bf43d84bSEric Sandeen /* 2700bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 2701bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 2702bf43d84bSEric Sandeen */ 2703bf43d84bSEric Sandeen if ((ext4_blocks_count(es) > 2704bf43d84bSEric Sandeen (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) || 2705bf43d84bSEric Sandeen (ext4_blocks_count(es) > 2706bf43d84bSEric Sandeen (pgoff_t)(~0ULL) >> (PAGE_CACHE_SHIFT - sb->s_blocksize_bits))) { 2707b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 2708bf43d84bSEric Sandeen " too large to mount safely on this system"); 2709ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 271090c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 2711bf43d84bSEric Sandeen ret = -EFBIG; 2712ac27a0ecSDave Kleikamp goto failed_mount; 2713ac27a0ecSDave Kleikamp } 2714ac27a0ecSDave Kleikamp 2715617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2716617ba13bSMingming Cao goto cantfind_ext4; 2717e7c95593SEric Sandeen 27180f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 27190f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 27200f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 2721b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 2722b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 27230f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 27240f2ddca6SFrom: Thiemo Nagel goto failed_mount; 27250f2ddca6SFrom: Thiemo Nagel } 27260f2ddca6SFrom: Thiemo Nagel 27274ec11028STheodore Ts'o /* 27284ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 27294ec11028STheodore Ts'o * of the filesystem. 27304ec11028STheodore Ts'o */ 27314ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 2732b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 2733b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 2734e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 27354ec11028STheodore Ts'o ext4_blocks_count(es)); 2736e7c95593SEric Sandeen goto failed_mount; 2737e7c95593SEric Sandeen } 2738bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2739bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2740bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2741bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 27424ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 2743b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 27444ec11028STheodore Ts'o "(block count %llu, first data block %u, " 2745b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 27464ec11028STheodore Ts'o ext4_blocks_count(es), 27474ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 27484ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 27494ec11028STheodore Ts'o goto failed_mount; 27504ec11028STheodore Ts'o } 2751bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2752fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 2753fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 2754617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2755617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2756ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 2757ac27a0ecSDave Kleikamp GFP_KERNEL); 2758ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2759b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 2760ac27a0ecSDave Kleikamp goto failed_mount; 2761ac27a0ecSDave Kleikamp } 2762ac27a0ecSDave Kleikamp 27633244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 27649f6200bbSTheodore Ts'o if (ext4_proc_root) 27659f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 27663244fcb1SAlexander Beregalov #endif 2767240799cdSTheodore Ts'o 2768705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 2769ac27a0ecSDave Kleikamp 2770ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 277170bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2772ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2773ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2774b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2775b31e1552SEric Sandeen "can't read group descriptor %d", i); 2776ac27a0ecSDave Kleikamp db_count = i; 2777ac27a0ecSDave Kleikamp goto failed_mount2; 2778ac27a0ecSDave Kleikamp } 2779ac27a0ecSDave Kleikamp } 2780617ba13bSMingming Cao if (!ext4_check_descriptors(sb)) { 2781b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 2782ac27a0ecSDave Kleikamp goto failed_mount2; 2783ac27a0ecSDave Kleikamp } 2784772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2785772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 2786b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2787b31e1552SEric Sandeen "unable to initialize " 2788b31e1552SEric Sandeen "flex_bg meta info!"); 2789772cb7c8SJose R. Santos goto failed_mount2; 2790772cb7c8SJose R. Santos } 2791772cb7c8SJose R. Santos 2792ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2793ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2794ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2795ac27a0ecSDave Kleikamp 2796833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeblocks_counter, 2797617ba13bSMingming Cao ext4_count_free_blocks(sb)); 2798833f4077SPeter Zijlstra if (!err) { 2799833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeinodes_counter, 2800617ba13bSMingming Cao ext4_count_free_inodes(sb)); 2801833f4077SPeter Zijlstra } 2802833f4077SPeter Zijlstra if (!err) { 2803833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_dirs_counter, 2804617ba13bSMingming Cao ext4_count_dirs(sb)); 2805833f4077SPeter Zijlstra } 28066bc6e63fSAneesh Kumar K.V if (!err) { 28076bc6e63fSAneesh Kumar K.V err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 28086bc6e63fSAneesh Kumar K.V } 2809833f4077SPeter Zijlstra if (err) { 2810b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "insufficient memory"); 2811833f4077SPeter Zijlstra goto failed_mount3; 2812833f4077SPeter Zijlstra } 2813ac27a0ecSDave Kleikamp 2814c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 281555138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 2816c9de560dSAlex Tomas 2817ac27a0ecSDave Kleikamp /* 2818ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2819ac27a0ecSDave Kleikamp */ 28209ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 28219ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 2822617ba13bSMingming Cao sb->s_op = &ext4_sops; 28239ca92389STheodore Ts'o else 28249ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 2825617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2826617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2827ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2828617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2829617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2830ac27a0ecSDave Kleikamp #endif 2831ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 28323b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 283332ed5058STheodore Ts'o mutex_init(&sbi->s_resize_lock); 2834ac27a0ecSDave Kleikamp 2835ac27a0ecSDave Kleikamp sb->s_root = NULL; 2836ac27a0ecSDave Kleikamp 2837ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2838617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2839617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2840ac27a0ecSDave Kleikamp 2841ac27a0ecSDave Kleikamp /* 2842ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2843ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2844ac27a0ecSDave Kleikamp */ 2845ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2846617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2847617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2848ac27a0ecSDave Kleikamp goto failed_mount3; 28490390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 28500390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2851b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 2852b31e1552SEric Sandeen "suppressed and not mounted read-only"); 2853744692dcSJiaying Zhang goto failed_mount_wq; 2854ac27a0ecSDave Kleikamp } else { 28550390131bSFrank Mayhar clear_opt(sbi->s_mount_opt, DATA_FLAGS); 28560390131bSFrank Mayhar set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 28570390131bSFrank Mayhar sbi->s_journal = NULL; 28580390131bSFrank Mayhar needs_recovery = 0; 28590390131bSFrank Mayhar goto no_journal; 2860ac27a0ecSDave Kleikamp } 2861ac27a0ecSDave Kleikamp 2862eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2863eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2864eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2865b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 2866744692dcSJiaying Zhang goto failed_mount_wq; 2867eb40a09cSJose R. Santos } 2868eb40a09cSJose R. Santos 2869d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 2870d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 2871d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2872d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2873d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 2874818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2875818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2876818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2877818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2878d4da6c9cSLinus Torvalds } else { 2879d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 2880d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2881d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2882d4da6c9cSLinus Torvalds } 2883818d276cSGirish Shilamkar 2884ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2885ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2886ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 2887ac27a0ecSDave Kleikamp case 0: 2888ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 288963f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 289063f57933SAndrew Morton * cope, else JOURNAL_DATA 289163f57933SAndrew Morton */ 2892dab291afSMingming Cao if (jbd2_journal_check_available_features 2893dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 2894ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 2895ac27a0ecSDave Kleikamp else 2896ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2897ac27a0ecSDave Kleikamp break; 2898ac27a0ecSDave Kleikamp 2899617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 2900617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 2901dab291afSMingming Cao if (!jbd2_journal_check_available_features 2902dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 2903b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 2904b31e1552SEric Sandeen "requested data journaling mode"); 2905744692dcSJiaying Zhang goto failed_mount_wq; 2906ac27a0ecSDave Kleikamp } 2907ac27a0ecSDave Kleikamp default: 2908ac27a0ecSDave Kleikamp break; 2909ac27a0ecSDave Kleikamp } 2910b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 2911ac27a0ecSDave Kleikamp 29120390131bSFrank Mayhar no_journal: 2913ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 2914617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 2915b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring nobh option - " 2916b31e1552SEric Sandeen "its supported only with writeback mode"); 2917ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 2918ac27a0ecSDave Kleikamp } 2919744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) { 2920744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "dioread_nolock option is " 2921744692dcSJiaying Zhang "not supported with nobh mode"); 2922744692dcSJiaying Zhang goto failed_mount_wq; 2923744692dcSJiaying Zhang } 2924ac27a0ecSDave Kleikamp } 29254c0425ffSMingming Cao EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); 29264c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 29274c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 29284c0425ffSMingming Cao goto failed_mount_wq; 29294c0425ffSMingming Cao } 29304c0425ffSMingming Cao 2931ac27a0ecSDave Kleikamp /* 2932dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 2933ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 2934ac27a0ecSDave Kleikamp */ 2935ac27a0ecSDave Kleikamp 29361d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 29371d1fe1eeSDavid Howells if (IS_ERR(root)) { 2938b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 29391d1fe1eeSDavid Howells ret = PTR_ERR(root); 2940ac27a0ecSDave Kleikamp goto failed_mount4; 2941ac27a0ecSDave Kleikamp } 2942ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 29431d1fe1eeSDavid Howells iput(root); 2944b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 2945ac27a0ecSDave Kleikamp goto failed_mount4; 2946ac27a0ecSDave Kleikamp } 29471d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 29481d1fe1eeSDavid Howells if (!sb->s_root) { 2949b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 29501d1fe1eeSDavid Howells iput(root); 29511d1fe1eeSDavid Howells ret = -ENOMEM; 29521d1fe1eeSDavid Howells goto failed_mount4; 29531d1fe1eeSDavid Howells } 2954ac27a0ecSDave Kleikamp 2955617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 2956ef7f3835SKalpak Shah 2957ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 2958ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 2959ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2960ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2961ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 2962ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 2963ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2964ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 2965ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2966ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 2967ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2968ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 2969ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2970ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 2971ef7f3835SKalpak Shah } 2972ef7f3835SKalpak Shah } 2973ef7f3835SKalpak Shah /* Check if enough inode space is available */ 2974ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 2975ef7f3835SKalpak Shah sbi->s_inode_size) { 2976ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2977ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2978b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 2979b31e1552SEric Sandeen "available"); 2980ef7f3835SKalpak Shah } 2981ef7f3835SKalpak Shah 298290576c0bSTheodore Ts'o if (test_opt(sb, DELALLOC) && 298390576c0bSTheodore Ts'o (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 2984b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " 2985b31e1552SEric Sandeen "requested data journaling mode"); 2986c2774d84SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 298790576c0bSTheodore Ts'o } 2988744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) { 2989744692dcSJiaying Zhang if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 2990744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 2991744692dcSJiaying Zhang "option - requested data journaling mode"); 2992744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 2993744692dcSJiaying Zhang } 2994744692dcSJiaying Zhang if (sb->s_blocksize < PAGE_SIZE) { 2995744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 2996744692dcSJiaying Zhang "option - block size is too small"); 2997744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 2998744692dcSJiaying Zhang } 2999744692dcSJiaying Zhang } 3000c2774d84SAneesh Kumar K.V 30016fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 30026fd058f7STheodore Ts'o if (err) { 3003b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 30046fd058f7STheodore Ts'o "zone (%d)\n", err); 30056fd058f7STheodore Ts'o goto failed_mount4; 30066fd058f7STheodore Ts'o } 30076fd058f7STheodore Ts'o 3008c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 3009c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 3010c2774d84SAneesh Kumar K.V if (err) { 3011b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initalize mballoc (%d)", 3012c2774d84SAneesh Kumar K.V err); 3013c2774d84SAneesh Kumar K.V goto failed_mount4; 3014c2774d84SAneesh Kumar K.V } 3015c2774d84SAneesh Kumar K.V 30163197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 30173197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 30183197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 30193197ebdbSTheodore Ts'o "%s", sb->s_id); 30203197ebdbSTheodore Ts'o if (err) { 30213197ebdbSTheodore Ts'o ext4_mb_release(sb); 30223197ebdbSTheodore Ts'o ext4_ext_release(sb); 30233197ebdbSTheodore Ts'o goto failed_mount4; 30243197ebdbSTheodore Ts'o }; 30253197ebdbSTheodore Ts'o 3026617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3027617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3028617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 30290390131bSFrank Mayhar if (needs_recovery) { 3030b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3031617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 30320390131bSFrank Mayhar } 30330390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 30340390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 30350390131bSFrank Mayhar descr = " journalled data mode"; 30360390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 30370390131bSFrank Mayhar descr = " ordered data mode"; 30380390131bSFrank Mayhar else 30390390131bSFrank Mayhar descr = " writeback data mode"; 30400390131bSFrank Mayhar } else 30410390131bSFrank Mayhar descr = "out journal"; 30420390131bSFrank Mayhar 3043b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "mounted filesystem with%s", descr); 3044ac27a0ecSDave Kleikamp 3045ac27a0ecSDave Kleikamp lock_kernel(); 3046ac27a0ecSDave Kleikamp return 0; 3047ac27a0ecSDave Kleikamp 3048617ba13bSMingming Cao cantfind_ext4: 3049ac27a0ecSDave Kleikamp if (!silent) 3050b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3051ac27a0ecSDave Kleikamp goto failed_mount; 3052ac27a0ecSDave Kleikamp 3053ac27a0ecSDave Kleikamp failed_mount4: 3054b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 30554c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 30564c0425ffSMingming Cao failed_mount_wq: 30576fd058f7STheodore Ts'o ext4_release_system_zone(sb); 30580390131bSFrank Mayhar if (sbi->s_journal) { 3059dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 306047b4a50bSJan Kara sbi->s_journal = NULL; 30610390131bSFrank Mayhar } 3062ac27a0ecSDave Kleikamp failed_mount3: 3063c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) { 3064c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 3065c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 3066c5ca7c76STheodore Ts'o else 3067c5ca7c76STheodore Ts'o kfree(sbi->s_flex_groups); 3068c5ca7c76STheodore Ts'o } 3069ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 3070ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 3071ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 30726bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 3073ac27a0ecSDave Kleikamp failed_mount2: 3074ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 3075ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 3076ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 3077ac27a0ecSDave Kleikamp failed_mount: 3078240799cdSTheodore Ts'o if (sbi->s_proc) { 30799f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 3080240799cdSTheodore Ts'o } 3081ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3082ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3083ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3084ac27a0ecSDave Kleikamp #endif 3085617ba13bSMingming Cao ext4_blkdev_remove(sbi); 3086ac27a0ecSDave Kleikamp brelse(bh); 3087ac27a0ecSDave Kleikamp out_fail: 3088ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 3089f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 3090ac27a0ecSDave Kleikamp kfree(sbi); 3091ac27a0ecSDave Kleikamp lock_kernel(); 30921d1fe1eeSDavid Howells return ret; 3093ac27a0ecSDave Kleikamp } 3094ac27a0ecSDave Kleikamp 3095ac27a0ecSDave Kleikamp /* 3096ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 3097ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 3098ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 3099ac27a0ecSDave Kleikamp */ 3100617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3101ac27a0ecSDave Kleikamp { 3102617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3103ac27a0ecSDave Kleikamp 3104ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 310530773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 310630773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3107ac27a0ecSDave Kleikamp 3108ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 3109ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3110dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3111ac27a0ecSDave Kleikamp else 3112dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 31135bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 31145bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 31155bf5683aSHidehiro Kawai else 31165bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3117ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 3118ac27a0ecSDave Kleikamp } 3119ac27a0ecSDave Kleikamp 3120617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3121ac27a0ecSDave Kleikamp unsigned int journal_inum) 3122ac27a0ecSDave Kleikamp { 3123ac27a0ecSDave Kleikamp struct inode *journal_inode; 3124ac27a0ecSDave Kleikamp journal_t *journal; 3125ac27a0ecSDave Kleikamp 31260390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 31270390131bSFrank Mayhar 3128ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3129ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3130ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3131ac27a0ecSDave Kleikamp 31321d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 31331d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3134b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3135ac27a0ecSDave Kleikamp return NULL; 3136ac27a0ecSDave Kleikamp } 3137ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3138ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3139ac27a0ecSDave Kleikamp iput(journal_inode); 3140b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3141ac27a0ecSDave Kleikamp return NULL; 3142ac27a0ecSDave Kleikamp } 3143ac27a0ecSDave Kleikamp 3144e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3145ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 31461d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3147b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3148ac27a0ecSDave Kleikamp iput(journal_inode); 3149ac27a0ecSDave Kleikamp return NULL; 3150ac27a0ecSDave Kleikamp } 3151ac27a0ecSDave Kleikamp 3152dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3153ac27a0ecSDave Kleikamp if (!journal) { 3154b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3155ac27a0ecSDave Kleikamp iput(journal_inode); 3156ac27a0ecSDave Kleikamp return NULL; 3157ac27a0ecSDave Kleikamp } 3158ac27a0ecSDave Kleikamp journal->j_private = sb; 3159617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3160ac27a0ecSDave Kleikamp return journal; 3161ac27a0ecSDave Kleikamp } 3162ac27a0ecSDave Kleikamp 3163617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3164ac27a0ecSDave Kleikamp dev_t j_dev) 3165ac27a0ecSDave Kleikamp { 3166ac27a0ecSDave Kleikamp struct buffer_head *bh; 3167ac27a0ecSDave Kleikamp journal_t *journal; 3168617ba13bSMingming Cao ext4_fsblk_t start; 3169617ba13bSMingming Cao ext4_fsblk_t len; 3170ac27a0ecSDave Kleikamp int hblock, blocksize; 3171617ba13bSMingming Cao ext4_fsblk_t sb_block; 3172ac27a0ecSDave Kleikamp unsigned long offset; 3173617ba13bSMingming Cao struct ext4_super_block *es; 3174ac27a0ecSDave Kleikamp struct block_device *bdev; 3175ac27a0ecSDave Kleikamp 31760390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 31770390131bSFrank Mayhar 3178b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3179ac27a0ecSDave Kleikamp if (bdev == NULL) 3180ac27a0ecSDave Kleikamp return NULL; 3181ac27a0ecSDave Kleikamp 3182ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 3183b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3184b31e1552SEric Sandeen "failed to claim external journal device"); 31859a1c3542SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 3186ac27a0ecSDave Kleikamp return NULL; 3187ac27a0ecSDave Kleikamp } 3188ac27a0ecSDave Kleikamp 3189ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3190e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3191ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3192b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3193b31e1552SEric Sandeen "blocksize too small for journal device"); 3194ac27a0ecSDave Kleikamp goto out_bdev; 3195ac27a0ecSDave Kleikamp } 3196ac27a0ecSDave Kleikamp 3197617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3198617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3199ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3200ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3201b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3202b31e1552SEric Sandeen "external journal"); 3203ac27a0ecSDave Kleikamp goto out_bdev; 3204ac27a0ecSDave Kleikamp } 3205ac27a0ecSDave Kleikamp 3206617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3207617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3208ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3209617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3210b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3211b31e1552SEric Sandeen "bad superblock"); 3212ac27a0ecSDave Kleikamp brelse(bh); 3213ac27a0ecSDave Kleikamp goto out_bdev; 3214ac27a0ecSDave Kleikamp } 3215ac27a0ecSDave Kleikamp 3216617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3217b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3218ac27a0ecSDave Kleikamp brelse(bh); 3219ac27a0ecSDave Kleikamp goto out_bdev; 3220ac27a0ecSDave Kleikamp } 3221ac27a0ecSDave Kleikamp 3222bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3223ac27a0ecSDave Kleikamp start = sb_block + 1; 3224ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3225ac27a0ecSDave Kleikamp 3226dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3227ac27a0ecSDave Kleikamp start, len, blocksize); 3228ac27a0ecSDave Kleikamp if (!journal) { 3229b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3230ac27a0ecSDave Kleikamp goto out_bdev; 3231ac27a0ecSDave Kleikamp } 3232ac27a0ecSDave Kleikamp journal->j_private = sb; 3233ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3234ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3235ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3236b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3237ac27a0ecSDave Kleikamp goto out_journal; 3238ac27a0ecSDave Kleikamp } 3239ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3240b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3241b31e1552SEric Sandeen "user (unsupported) - %d", 3242ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3243ac27a0ecSDave Kleikamp goto out_journal; 3244ac27a0ecSDave Kleikamp } 3245617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3246617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3247ac27a0ecSDave Kleikamp return journal; 32480b8e58a1SAndreas Dilger 3249ac27a0ecSDave Kleikamp out_journal: 3250dab291afSMingming Cao jbd2_journal_destroy(journal); 3251ac27a0ecSDave Kleikamp out_bdev: 3252617ba13bSMingming Cao ext4_blkdev_put(bdev); 3253ac27a0ecSDave Kleikamp return NULL; 3254ac27a0ecSDave Kleikamp } 3255ac27a0ecSDave Kleikamp 3256617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3257617ba13bSMingming Cao struct ext4_super_block *es, 3258ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3259ac27a0ecSDave Kleikamp { 3260ac27a0ecSDave Kleikamp journal_t *journal; 3261ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3262ac27a0ecSDave Kleikamp dev_t journal_dev; 3263ac27a0ecSDave Kleikamp int err = 0; 3264ac27a0ecSDave Kleikamp int really_read_only; 3265ac27a0ecSDave Kleikamp 32660390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 32670390131bSFrank Mayhar 3268ac27a0ecSDave Kleikamp if (journal_devnum && 3269ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3270b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3271b31e1552SEric Sandeen "numbers have changed"); 3272ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3273ac27a0ecSDave Kleikamp } else 3274ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3275ac27a0ecSDave Kleikamp 3276ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3277ac27a0ecSDave Kleikamp 3278ac27a0ecSDave Kleikamp /* 3279ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3280ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3281ac27a0ecSDave Kleikamp * can get read-write access to the device. 3282ac27a0ecSDave Kleikamp */ 3283617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3284ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3285b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3286b31e1552SEric Sandeen "required on readonly filesystem"); 3287ac27a0ecSDave Kleikamp if (really_read_only) { 3288b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3289b31e1552SEric Sandeen "unavailable, cannot proceed"); 3290ac27a0ecSDave Kleikamp return -EROFS; 3291ac27a0ecSDave Kleikamp } 3292b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 3293b31e1552SEric Sandeen "be enabled during recovery"); 3294ac27a0ecSDave Kleikamp } 3295ac27a0ecSDave Kleikamp } 3296ac27a0ecSDave Kleikamp 3297ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3298b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 3299b31e1552SEric Sandeen "and inode journals!"); 3300ac27a0ecSDave Kleikamp return -EINVAL; 3301ac27a0ecSDave Kleikamp } 3302ac27a0ecSDave Kleikamp 3303ac27a0ecSDave Kleikamp if (journal_inum) { 3304617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3305ac27a0ecSDave Kleikamp return -EINVAL; 3306ac27a0ecSDave Kleikamp } else { 3307617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3308ac27a0ecSDave Kleikamp return -EINVAL; 3309ac27a0ecSDave Kleikamp } 3310ac27a0ecSDave Kleikamp 331190576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 3312b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 33134776004fSTheodore Ts'o 3314ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 3315dab291afSMingming Cao err = jbd2_journal_update_format(journal); 3316ac27a0ecSDave Kleikamp if (err) { 3317b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 3318dab291afSMingming Cao jbd2_journal_destroy(journal); 3319ac27a0ecSDave Kleikamp return err; 3320ac27a0ecSDave Kleikamp } 3321ac27a0ecSDave Kleikamp } 3322ac27a0ecSDave Kleikamp 3323617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3324dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 3325ac27a0ecSDave Kleikamp if (!err) 3326dab291afSMingming Cao err = jbd2_journal_load(journal); 3327ac27a0ecSDave Kleikamp 3328ac27a0ecSDave Kleikamp if (err) { 3329b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 3330dab291afSMingming Cao jbd2_journal_destroy(journal); 3331ac27a0ecSDave Kleikamp return err; 3332ac27a0ecSDave Kleikamp } 3333ac27a0ecSDave Kleikamp 3334617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 3335617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3336ac27a0ecSDave Kleikamp 3337ac27a0ecSDave Kleikamp if (journal_devnum && 3338ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3339ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 3340ac27a0ecSDave Kleikamp 3341ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 3342e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3343ac27a0ecSDave Kleikamp } 3344ac27a0ecSDave Kleikamp 3345ac27a0ecSDave Kleikamp return 0; 3346ac27a0ecSDave Kleikamp } 3347ac27a0ecSDave Kleikamp 3348e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 3349ac27a0ecSDave Kleikamp { 3350e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3351617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 3352c4be0c1dSTakashi Sato int error = 0; 3353ac27a0ecSDave Kleikamp 3354ac27a0ecSDave Kleikamp if (!sbh) 3355c4be0c1dSTakashi Sato return error; 3356914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 3357914258bfSTheodore Ts'o /* 3358914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 3359914258bfSTheodore Ts'o * superblock failed. This could happen because the 3360914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 3361914258bfSTheodore Ts'o * be a transient write error and maybe the block will 3362914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 3363914258bfSTheodore Ts'o * write and hope for the best. 3364914258bfSTheodore Ts'o */ 3365b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 3366b31e1552SEric Sandeen "superblock detected"); 3367914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3368914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3369914258bfSTheodore Ts'o } 337071290b36STheodore Ts'o /* 337171290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 337271290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 337371290b36STheodore Ts'o * write time when we are mounting the root file system 337471290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 337571290b36STheodore Ts'o * for people who are east of GMT and who make their clock 337671290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 337771290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 337871290b36STheodore Ts'o * to complain and force a full file system check. 337971290b36STheodore Ts'o */ 338071290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 3381ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 3382afc32f7eSTheodore Ts'o es->s_kbytes_written = 3383afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 3384afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 3385afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 33865d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 33875d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 33885d1b1b3fSAneesh Kumar K.V es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( 33895d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 33907234ab2aSTheodore Ts'o sb->s_dirt = 0; 3391ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 3392ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 3393914258bfSTheodore Ts'o if (sync) { 3394c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 3395c4be0c1dSTakashi Sato if (error) 3396c4be0c1dSTakashi Sato return error; 3397c4be0c1dSTakashi Sato 3398c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 3399c4be0c1dSTakashi Sato if (error) { 3400b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 3401b31e1552SEric Sandeen "superblock"); 3402914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3403914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3404914258bfSTheodore Ts'o } 3405914258bfSTheodore Ts'o } 3406c4be0c1dSTakashi Sato return error; 3407ac27a0ecSDave Kleikamp } 3408ac27a0ecSDave Kleikamp 3409ac27a0ecSDave Kleikamp /* 3410ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 3411ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 3412ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 3413ac27a0ecSDave Kleikamp */ 3414617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 3415617ba13bSMingming Cao struct ext4_super_block *es) 3416ac27a0ecSDave Kleikamp { 3417617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 3418ac27a0ecSDave Kleikamp 34190390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 34200390131bSFrank Mayhar BUG_ON(journal != NULL); 34210390131bSFrank Mayhar return; 34220390131bSFrank Mayhar } 3423dab291afSMingming Cao jbd2_journal_lock_updates(journal); 34247ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 34257ffe1ea8SHidehiro Kawai goto out; 34267ffe1ea8SHidehiro Kawai 3427617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 3428ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 3429617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3430e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3431ac27a0ecSDave Kleikamp } 34327ffe1ea8SHidehiro Kawai 34337ffe1ea8SHidehiro Kawai out: 3434dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 3435ac27a0ecSDave Kleikamp } 3436ac27a0ecSDave Kleikamp 3437ac27a0ecSDave Kleikamp /* 3438ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 3439ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 3440ac27a0ecSDave Kleikamp * main filesystem now. 3441ac27a0ecSDave Kleikamp */ 3442617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 3443617ba13bSMingming Cao struct ext4_super_block *es) 3444ac27a0ecSDave Kleikamp { 3445ac27a0ecSDave Kleikamp journal_t *journal; 3446ac27a0ecSDave Kleikamp int j_errno; 3447ac27a0ecSDave Kleikamp const char *errstr; 3448ac27a0ecSDave Kleikamp 34490390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 34500390131bSFrank Mayhar 3451617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 3452ac27a0ecSDave Kleikamp 3453ac27a0ecSDave Kleikamp /* 3454ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 3455617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 3456ac27a0ecSDave Kleikamp */ 3457ac27a0ecSDave Kleikamp 3458dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 3459ac27a0ecSDave Kleikamp if (j_errno) { 3460ac27a0ecSDave Kleikamp char nbuf[16]; 3461ac27a0ecSDave Kleikamp 3462617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 346312062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 3464ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 346512062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 3466ac27a0ecSDave Kleikamp 3467617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3468617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3469e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3470ac27a0ecSDave Kleikamp 3471dab291afSMingming Cao jbd2_journal_clear_err(journal); 3472ac27a0ecSDave Kleikamp } 3473ac27a0ecSDave Kleikamp } 3474ac27a0ecSDave Kleikamp 3475ac27a0ecSDave Kleikamp /* 3476ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 3477ac27a0ecSDave Kleikamp * and wait on the commit. 3478ac27a0ecSDave Kleikamp */ 3479617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 3480ac27a0ecSDave Kleikamp { 3481ac27a0ecSDave Kleikamp journal_t *journal; 34820390131bSFrank Mayhar int ret = 0; 3483ac27a0ecSDave Kleikamp 3484ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 3485ac27a0ecSDave Kleikamp return 0; 3486ac27a0ecSDave Kleikamp 3487617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 34887234ab2aSTheodore Ts'o if (journal) 3489617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 34900390131bSFrank Mayhar 3491ac27a0ecSDave Kleikamp return ret; 3492ac27a0ecSDave Kleikamp } 3493ac27a0ecSDave Kleikamp 3494617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 3495ac27a0ecSDave Kleikamp { 3496ebc1ac16SChristoph Hellwig lock_super(sb); 3497e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3498ebc1ac16SChristoph Hellwig unlock_super(sb); 34990390131bSFrank Mayhar } 3500ac27a0ecSDave Kleikamp 3501617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 3502ac27a0ecSDave Kleikamp { 350314ce0cb4STheodore Ts'o int ret = 0; 35049eddacf9SJan Kara tid_t target; 35058d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3506ac27a0ecSDave Kleikamp 35079bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 35088d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 35098d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 3510ac27a0ecSDave Kleikamp if (wait) 35118d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 35120390131bSFrank Mayhar } 351314ce0cb4STheodore Ts'o return ret; 3514ac27a0ecSDave Kleikamp } 3515ac27a0ecSDave Kleikamp 3516ac27a0ecSDave Kleikamp /* 3517ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 3518ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 3519ac27a0ecSDave Kleikamp */ 3520c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 3521ac27a0ecSDave Kleikamp { 3522c4be0c1dSTakashi Sato int error = 0; 3523c4be0c1dSTakashi Sato journal_t *journal; 3524ac27a0ecSDave Kleikamp 35259ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 35269ca92389STheodore Ts'o return 0; 35279ca92389STheodore Ts'o 3528c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 3529ac27a0ecSDave Kleikamp 3530ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 3531dab291afSMingming Cao jbd2_journal_lock_updates(journal); 35327ffe1ea8SHidehiro Kawai 35337ffe1ea8SHidehiro Kawai /* 35349ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 35359ca92389STheodore Ts'o * the journal. 35367ffe1ea8SHidehiro Kawai */ 3537c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 35389ca92389STheodore Ts'o if (error < 0) { 35399ca92389STheodore Ts'o out: 35409ca92389STheodore Ts'o jbd2_journal_unlock_updates(journal); 35419ca92389STheodore Ts'o return error; 35420390131bSFrank Mayhar } 3543ac27a0ecSDave Kleikamp 3544ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 3545617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3546e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 3547c4be0c1dSTakashi Sato if (error) 3548c4be0c1dSTakashi Sato goto out; 3549c4be0c1dSTakashi Sato return 0; 3550ac27a0ecSDave Kleikamp } 3551ac27a0ecSDave Kleikamp 3552ac27a0ecSDave Kleikamp /* 3553ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 3554ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 3555ac27a0ecSDave Kleikamp */ 3556c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 3557ac27a0ecSDave Kleikamp { 35589ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 35599ca92389STheodore Ts'o return 0; 35609ca92389STheodore Ts'o 3561ac27a0ecSDave Kleikamp lock_super(sb); 35629ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 3563617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3564e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3565ac27a0ecSDave Kleikamp unlock_super(sb); 3566dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 3567c4be0c1dSTakashi Sato return 0; 3568ac27a0ecSDave Kleikamp } 3569ac27a0ecSDave Kleikamp 3570617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 3571ac27a0ecSDave Kleikamp { 3572617ba13bSMingming Cao struct ext4_super_block *es; 3573617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3574617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 3575ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 3576617ba13bSMingming Cao struct ext4_mount_options old_opts; 3577c79d967dSChristoph Hellwig int enable_quota = 0; 35788a266467STheodore Ts'o ext4_group_t g; 3579b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3580ac27a0ecSDave Kleikamp int err; 3581ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3582ac27a0ecSDave Kleikamp int i; 3583ac27a0ecSDave Kleikamp #endif 3584ac27a0ecSDave Kleikamp 3585337eb00aSAlessio Igor Bogani lock_kernel(); 3586337eb00aSAlessio Igor Bogani 3587ac27a0ecSDave Kleikamp /* Store the original options */ 3588bbd6851aSAl Viro lock_super(sb); 3589ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 3590ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 3591ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 3592ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 3593ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 359430773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 359530773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 3596ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3597ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 3598ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3599ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 3600ac27a0ecSDave Kleikamp #endif 3601b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 3602b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 3603ac27a0ecSDave Kleikamp 3604ac27a0ecSDave Kleikamp /* 3605ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 3606ac27a0ecSDave Kleikamp */ 3607b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 3608b3881f74STheodore Ts'o &n_blocks_count, 1)) { 3609ac27a0ecSDave Kleikamp err = -EINVAL; 3610ac27a0ecSDave Kleikamp goto restore_opts; 3611ac27a0ecSDave Kleikamp } 3612ac27a0ecSDave Kleikamp 36134ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 361446e665e9SHarvey Harrison ext4_abort(sb, __func__, "Abort forced by user"); 3615ac27a0ecSDave Kleikamp 3616ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3617482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3618ac27a0ecSDave Kleikamp 3619ac27a0ecSDave Kleikamp es = sbi->s_es; 3620ac27a0ecSDave Kleikamp 3621b3881f74STheodore Ts'o if (sbi->s_journal) { 3622617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 3623b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3624b3881f74STheodore Ts'o } 3625ac27a0ecSDave Kleikamp 3626ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 3627bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 36284ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 3629ac27a0ecSDave Kleikamp err = -EROFS; 3630ac27a0ecSDave Kleikamp goto restore_opts; 3631ac27a0ecSDave Kleikamp } 3632ac27a0ecSDave Kleikamp 3633ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 3634*0f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 3635*0f0dd62fSChristoph Hellwig if (err < 0) 3636c79d967dSChristoph Hellwig goto restore_opts; 3637c79d967dSChristoph Hellwig 3638ac27a0ecSDave Kleikamp /* 3639ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 3640ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 3641ac27a0ecSDave Kleikamp */ 3642ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 3643ac27a0ecSDave Kleikamp 3644ac27a0ecSDave Kleikamp /* 3645ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 3646ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 3647ac27a0ecSDave Kleikamp * mark the partition as valid again. 3648ac27a0ecSDave Kleikamp */ 3649617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 3650617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 3651ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 3652ac27a0ecSDave Kleikamp 3653a63c9eb2STheodore Ts'o if (sbi->s_journal) 3654617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 3655ac27a0ecSDave Kleikamp } else { 3656a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 3657a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 3658ac27a0ecSDave Kleikamp err = -EROFS; 3659ac27a0ecSDave Kleikamp goto restore_opts; 3660ac27a0ecSDave Kleikamp } 3661ead6596bSEric Sandeen /* 36628a266467STheodore Ts'o * Make sure the group descriptor checksums 36630b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 36648a266467STheodore Ts'o */ 36658a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 36668a266467STheodore Ts'o struct ext4_group_desc *gdp = 36678a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 36688a266467STheodore Ts'o 36698a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 3670b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3671b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 36728a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 36738a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 36748a266467STheodore Ts'o err = -EINVAL; 36758a266467STheodore Ts'o goto restore_opts; 36768a266467STheodore Ts'o } 36778a266467STheodore Ts'o } 36788a266467STheodore Ts'o 36798a266467STheodore Ts'o /* 3680ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 3681ead6596bSEric Sandeen * around from a previously readonly bdev mount, 3682ead6596bSEric Sandeen * require a full umount/remount for now. 3683ead6596bSEric Sandeen */ 3684ead6596bSEric Sandeen if (es->s_last_orphan) { 3685b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 3686ead6596bSEric Sandeen "remount RDWR because of unprocessed " 3687ead6596bSEric Sandeen "orphan inode list. Please " 3688b31e1552SEric Sandeen "umount/remount instead"); 3689ead6596bSEric Sandeen err = -EINVAL; 3690ead6596bSEric Sandeen goto restore_opts; 3691ead6596bSEric Sandeen } 3692ead6596bSEric Sandeen 3693ac27a0ecSDave Kleikamp /* 3694ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 3695ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 3696ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 3697ac27a0ecSDave Kleikamp * the partition.) 3698ac27a0ecSDave Kleikamp */ 36990390131bSFrank Mayhar if (sbi->s_journal) 3700617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3701ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3702617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 3703ac27a0ecSDave Kleikamp goto restore_opts; 3704617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 3705ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 3706c79d967dSChristoph Hellwig enable_quota = 1; 3707ac27a0ecSDave Kleikamp } 3708ac27a0ecSDave Kleikamp } 37096fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 37100390131bSFrank Mayhar if (sbi->s_journal == NULL) 3711e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 37120390131bSFrank Mayhar 3713ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3714ac27a0ecSDave Kleikamp /* Release old quota file names */ 3715ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3716ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 3717ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3718ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 3719ac27a0ecSDave Kleikamp #endif 3720bbd6851aSAl Viro unlock_super(sb); 3721337eb00aSAlessio Igor Bogani unlock_kernel(); 3722c79d967dSChristoph Hellwig if (enable_quota) 3723*0f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 3724ac27a0ecSDave Kleikamp return 0; 37250b8e58a1SAndreas Dilger 3726ac27a0ecSDave Kleikamp restore_opts: 3727ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 3728ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 3729ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 3730ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 3731ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 373230773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 373330773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 3734ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3735ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 3736ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 3737ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 3738ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3739ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3740ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 3741ac27a0ecSDave Kleikamp } 3742ac27a0ecSDave Kleikamp #endif 3743bbd6851aSAl Viro unlock_super(sb); 3744337eb00aSAlessio Igor Bogani unlock_kernel(); 3745ac27a0ecSDave Kleikamp return err; 3746ac27a0ecSDave Kleikamp } 3747ac27a0ecSDave Kleikamp 3748617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 3749ac27a0ecSDave Kleikamp { 3750ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 3751617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3752617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 3753960cc398SPekka Enberg u64 fsid; 3754ac27a0ecSDave Kleikamp 37555e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 37565e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 37576bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 37588df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 37595e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 3760ac27a0ecSDave Kleikamp 3761ac27a0ecSDave Kleikamp /* 37625e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 37635e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 37645e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 3765ac27a0ecSDave Kleikamp */ 3766ac27a0ecSDave Kleikamp 3767ac27a0ecSDave Kleikamp /* 3768ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 3769ac27a0ecSDave Kleikamp * overhead 3770ac27a0ecSDave Kleikamp */ 3771ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 3772ac27a0ecSDave Kleikamp 3773ac27a0ecSDave Kleikamp /* 3774ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 3775ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 3776ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 3777ac27a0ecSDave Kleikamp */ 3778ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 3779617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 3780617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 3781ac27a0ecSDave Kleikamp cond_resched(); 3782ac27a0ecSDave Kleikamp } 3783ac27a0ecSDave Kleikamp 3784ac27a0ecSDave Kleikamp /* 3785ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 3786ac27a0ecSDave Kleikamp * bitmap, and an inode table. 3787ac27a0ecSDave Kleikamp */ 37885e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 37895e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 37905e70030dSBadari Pulavarty smp_wmb(); 37916bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 3792ac27a0ecSDave Kleikamp } 3793ac27a0ecSDave Kleikamp 3794617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 3795ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 37965e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 37976bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 37986bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 3799bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 3800bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 3801ac27a0ecSDave Kleikamp buf->f_bavail = 0; 3802ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 380352d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 3804617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 3805960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 3806960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 3807960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 3808960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 38090b8e58a1SAndreas Dilger 3810ac27a0ecSDave Kleikamp return 0; 3811ac27a0ecSDave Kleikamp } 3812ac27a0ecSDave Kleikamp 38130b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 38140b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 3815ac27a0ecSDave Kleikamp * Process 1 Process 2 3816617ba13bSMingming Cao * ext4_create() quota_sync() 3817dab291afSMingming Cao * jbd2_journal_start() write_dquot() 3818871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 3819dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 3820ac27a0ecSDave Kleikamp * 3821ac27a0ecSDave Kleikamp */ 3822ac27a0ecSDave Kleikamp 3823ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3824ac27a0ecSDave Kleikamp 3825ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3826ac27a0ecSDave Kleikamp { 3827ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3828ac27a0ecSDave Kleikamp } 3829ac27a0ecSDave Kleikamp 3830617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3831ac27a0ecSDave Kleikamp { 3832ac27a0ecSDave Kleikamp int ret, err; 3833ac27a0ecSDave Kleikamp handle_t *handle; 3834ac27a0ecSDave Kleikamp struct inode *inode; 3835ac27a0ecSDave Kleikamp 3836ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3837617ba13bSMingming Cao handle = ext4_journal_start(inode, 3838617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3839ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3840ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3841ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3842617ba13bSMingming Cao err = ext4_journal_stop(handle); 3843ac27a0ecSDave Kleikamp if (!ret) 3844ac27a0ecSDave Kleikamp ret = err; 3845ac27a0ecSDave Kleikamp return ret; 3846ac27a0ecSDave Kleikamp } 3847ac27a0ecSDave Kleikamp 3848617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3849ac27a0ecSDave Kleikamp { 3850ac27a0ecSDave Kleikamp int ret, err; 3851ac27a0ecSDave Kleikamp handle_t *handle; 3852ac27a0ecSDave Kleikamp 3853617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3854617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3855ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3856ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3857ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 3858617ba13bSMingming Cao err = ext4_journal_stop(handle); 3859ac27a0ecSDave Kleikamp if (!ret) 3860ac27a0ecSDave Kleikamp ret = err; 3861ac27a0ecSDave Kleikamp return ret; 3862ac27a0ecSDave Kleikamp } 3863ac27a0ecSDave Kleikamp 3864617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 3865ac27a0ecSDave Kleikamp { 3866ac27a0ecSDave Kleikamp int ret, err; 3867ac27a0ecSDave Kleikamp handle_t *handle; 3868ac27a0ecSDave Kleikamp 3869617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3870617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 38719c3013e9SJan Kara if (IS_ERR(handle)) { 38729c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 38739c3013e9SJan Kara dquot_release(dquot); 3874ac27a0ecSDave Kleikamp return PTR_ERR(handle); 38759c3013e9SJan Kara } 3876ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 3877617ba13bSMingming Cao err = ext4_journal_stop(handle); 3878ac27a0ecSDave Kleikamp if (!ret) 3879ac27a0ecSDave Kleikamp ret = err; 3880ac27a0ecSDave Kleikamp return ret; 3881ac27a0ecSDave Kleikamp } 3882ac27a0ecSDave Kleikamp 3883617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 3884ac27a0ecSDave Kleikamp { 38852c8be6b2SJan Kara /* Are we journaling quotas? */ 3886617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 3887617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 3888ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 3889617ba13bSMingming Cao return ext4_write_dquot(dquot); 3890ac27a0ecSDave Kleikamp } else { 3891ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 3892ac27a0ecSDave Kleikamp } 3893ac27a0ecSDave Kleikamp } 3894ac27a0ecSDave Kleikamp 3895617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 3896ac27a0ecSDave Kleikamp { 3897ac27a0ecSDave Kleikamp int ret, err; 3898ac27a0ecSDave Kleikamp handle_t *handle; 3899ac27a0ecSDave Kleikamp 3900ac27a0ecSDave Kleikamp /* Data block + inode block */ 3901617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 3902ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3903ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3904ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 3905617ba13bSMingming Cao err = ext4_journal_stop(handle); 3906ac27a0ecSDave Kleikamp if (!ret) 3907ac27a0ecSDave Kleikamp ret = err; 3908ac27a0ecSDave Kleikamp return ret; 3909ac27a0ecSDave Kleikamp } 3910ac27a0ecSDave Kleikamp 3911ac27a0ecSDave Kleikamp /* 3912ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 3913ac27a0ecSDave Kleikamp * the quota file and such... 3914ac27a0ecSDave Kleikamp */ 3915617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 3916ac27a0ecSDave Kleikamp { 3917617ba13bSMingming Cao return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 3918617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 3919ac27a0ecSDave Kleikamp } 3920ac27a0ecSDave Kleikamp 3921ac27a0ecSDave Kleikamp /* 3922ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 3923ac27a0ecSDave Kleikamp */ 3924617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 39258264613dSAl Viro char *name, int remount) 3926ac27a0ecSDave Kleikamp { 3927ac27a0ecSDave Kleikamp int err; 39288264613dSAl Viro struct path path; 3929ac27a0ecSDave Kleikamp 3930ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 3931ac27a0ecSDave Kleikamp return -EINVAL; 39328264613dSAl Viro /* When remounting, no checks are needed and in fact, name is NULL */ 39330623543bSJan Kara if (remount) 39348264613dSAl Viro return vfs_quota_on(sb, type, format_id, name, remount); 39350623543bSJan Kara 39368264613dSAl Viro err = kern_path(name, LOOKUP_FOLLOW, &path); 3937ac27a0ecSDave Kleikamp if (err) 3938ac27a0ecSDave Kleikamp return err; 39390623543bSJan Kara 3940ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 39418264613dSAl Viro if (path.mnt->mnt_sb != sb) { 39428264613dSAl Viro path_put(&path); 3943ac27a0ecSDave Kleikamp return -EXDEV; 3944ac27a0ecSDave Kleikamp } 39450623543bSJan Kara /* Journaling quota? */ 39460623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 39472b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 39488264613dSAl Viro if (path.dentry->d_parent != sb->s_root) 3949b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3950b31e1552SEric Sandeen "Quota file not on filesystem root. " 3951b31e1552SEric Sandeen "Journaled quota will not work"); 39520623543bSJan Kara } 39530623543bSJan Kara 39540623543bSJan Kara /* 39550623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 39560623543bSJan Kara * all updates to the file when we bypass pagecache... 39570623543bSJan Kara */ 39580390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 39590390131bSFrank Mayhar ext4_should_journal_data(path.dentry->d_inode)) { 39600623543bSJan Kara /* 39610623543bSJan Kara * We don't need to lock updates but journal_flush() could 39620623543bSJan Kara * otherwise be livelocked... 39630623543bSJan Kara */ 39640623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 39657ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 39660623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 39677ffe1ea8SHidehiro Kawai if (err) { 39688264613dSAl Viro path_put(&path); 39697ffe1ea8SHidehiro Kawai return err; 39707ffe1ea8SHidehiro Kawai } 39710623543bSJan Kara } 39720623543bSJan Kara 39738264613dSAl Viro err = vfs_quota_on_path(sb, type, format_id, &path); 39748264613dSAl Viro path_put(&path); 397577e69dacSAl Viro return err; 3976ac27a0ecSDave Kleikamp } 3977ac27a0ecSDave Kleikamp 3978ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 3979ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 3980ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 3981ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 3982617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 3983ac27a0ecSDave Kleikamp size_t len, loff_t off) 3984ac27a0ecSDave Kleikamp { 3985ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3986725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3987ac27a0ecSDave Kleikamp int err = 0; 3988ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3989ac27a0ecSDave Kleikamp int tocopy; 3990ac27a0ecSDave Kleikamp size_t toread; 3991ac27a0ecSDave Kleikamp struct buffer_head *bh; 3992ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 3993ac27a0ecSDave Kleikamp 3994ac27a0ecSDave Kleikamp if (off > i_size) 3995ac27a0ecSDave Kleikamp return 0; 3996ac27a0ecSDave Kleikamp if (off+len > i_size) 3997ac27a0ecSDave Kleikamp len = i_size-off; 3998ac27a0ecSDave Kleikamp toread = len; 3999ac27a0ecSDave Kleikamp while (toread > 0) { 4000ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 4001ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 4002617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 4003ac27a0ecSDave Kleikamp if (err) 4004ac27a0ecSDave Kleikamp return err; 4005ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 4006ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 4007ac27a0ecSDave Kleikamp else 4008ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 4009ac27a0ecSDave Kleikamp brelse(bh); 4010ac27a0ecSDave Kleikamp offset = 0; 4011ac27a0ecSDave Kleikamp toread -= tocopy; 4012ac27a0ecSDave Kleikamp data += tocopy; 4013ac27a0ecSDave Kleikamp blk++; 4014ac27a0ecSDave Kleikamp } 4015ac27a0ecSDave Kleikamp return len; 4016ac27a0ecSDave Kleikamp } 4017ac27a0ecSDave Kleikamp 4018ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 4019ac27a0ecSDave Kleikamp * enough credits) */ 4020617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 4021ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 4022ac27a0ecSDave Kleikamp { 4023ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4024725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4025ac27a0ecSDave Kleikamp int err = 0; 4026ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4027617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 4028ac27a0ecSDave Kleikamp struct buffer_head *bh; 4029ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 4030ac27a0ecSDave Kleikamp 40310390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 4032b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4033b31e1552SEric Sandeen " cancelled because transaction is not started", 40349c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 40359c3013e9SJan Kara return -EIO; 40369c3013e9SJan Kara } 403767eeb568SDmitry Monakhov /* 403867eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 403967eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 404067eeb568SDmitry Monakhov */ 404167eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 404267eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 404367eeb568SDmitry Monakhov " cancelled because not block aligned", 404467eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 404567eeb568SDmitry Monakhov return -EIO; 404667eeb568SDmitry Monakhov } 404767eeb568SDmitry Monakhov 4048ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 4049617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 4050ac27a0ecSDave Kleikamp if (!bh) 4051ac27a0ecSDave Kleikamp goto out; 4052ac27a0ecSDave Kleikamp if (journal_quota) { 4053617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 4054ac27a0ecSDave Kleikamp if (err) { 4055ac27a0ecSDave Kleikamp brelse(bh); 4056ac27a0ecSDave Kleikamp goto out; 4057ac27a0ecSDave Kleikamp } 4058ac27a0ecSDave Kleikamp } 4059ac27a0ecSDave Kleikamp lock_buffer(bh); 406067eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 4061ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 4062ac27a0ecSDave Kleikamp unlock_buffer(bh); 4063ac27a0ecSDave Kleikamp if (journal_quota) 40640390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 4065ac27a0ecSDave Kleikamp else { 4066ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 4067678aaf48SJan Kara err = ext4_jbd2_file_inode(handle, inode); 4068ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 4069ac27a0ecSDave Kleikamp } 4070ac27a0ecSDave Kleikamp brelse(bh); 4071ac27a0ecSDave Kleikamp out: 407267eeb568SDmitry Monakhov if (err) { 40734d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 4074ac27a0ecSDave Kleikamp return err; 40754d04e4fbSJan Kara } 407667eeb568SDmitry Monakhov if (inode->i_size < off + len) { 407767eeb568SDmitry Monakhov i_size_write(inode, off + len); 4078617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 4079ac27a0ecSDave Kleikamp } 4080ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 4081617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 4082ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 408367eeb568SDmitry Monakhov return len; 4084ac27a0ecSDave Kleikamp } 4085ac27a0ecSDave Kleikamp 4086ac27a0ecSDave Kleikamp #endif 4087ac27a0ecSDave Kleikamp 40880b8e58a1SAndreas Dilger static int ext4_get_sb(struct file_system_type *fs_type, int flags, 40890b8e58a1SAndreas Dilger const char *dev_name, void *data, struct vfsmount *mnt) 4090ac27a0ecSDave Kleikamp { 4091617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); 4092ac27a0ecSDave Kleikamp } 4093ac27a0ecSDave Kleikamp 409437f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 409524b58424STheodore Ts'o static struct file_system_type ext2_fs_type = { 409624b58424STheodore Ts'o .owner = THIS_MODULE, 409724b58424STheodore Ts'o .name = "ext2", 409824b58424STheodore Ts'o .get_sb = ext4_get_sb, 409924b58424STheodore Ts'o .kill_sb = kill_block_super, 410024b58424STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 410124b58424STheodore Ts'o }; 410224b58424STheodore Ts'o 410324b58424STheodore Ts'o static inline void register_as_ext2(void) 410424b58424STheodore Ts'o { 410524b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 410624b58424STheodore Ts'o if (err) 410724b58424STheodore Ts'o printk(KERN_WARNING 410824b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 410924b58424STheodore Ts'o } 411024b58424STheodore Ts'o 411124b58424STheodore Ts'o static inline void unregister_as_ext2(void) 411224b58424STheodore Ts'o { 411324b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 411424b58424STheodore Ts'o } 411551b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 411624b58424STheodore Ts'o #else 411724b58424STheodore Ts'o static inline void register_as_ext2(void) { } 411824b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 411924b58424STheodore Ts'o #endif 412024b58424STheodore Ts'o 412137f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 412224b58424STheodore Ts'o static inline void register_as_ext3(void) 412324b58424STheodore Ts'o { 412424b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 412524b58424STheodore Ts'o if (err) 412624b58424STheodore Ts'o printk(KERN_WARNING 412724b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 412824b58424STheodore Ts'o } 412924b58424STheodore Ts'o 413024b58424STheodore Ts'o static inline void unregister_as_ext3(void) 413124b58424STheodore Ts'o { 413224b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 413324b58424STheodore Ts'o } 413451b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 413524b58424STheodore Ts'o #else 413624b58424STheodore Ts'o static inline void register_as_ext3(void) { } 413724b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 413824b58424STheodore Ts'o #endif 413924b58424STheodore Ts'o 414003010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 4141ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 414203010a33STheodore Ts'o .name = "ext4", 4143617ba13bSMingming Cao .get_sb = ext4_get_sb, 4144ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 4145ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 4146ac27a0ecSDave Kleikamp }; 4147ac27a0ecSDave Kleikamp 4148617ba13bSMingming Cao static int __init init_ext4_fs(void) 4149ac27a0ecSDave Kleikamp { 4150c9de560dSAlex Tomas int err; 4151c9de560dSAlex Tomas 41526fd058f7STheodore Ts'o err = init_ext4_system_zone(); 41536fd058f7STheodore Ts'o if (err) 41546fd058f7STheodore Ts'o return err; 41553197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 41563197ebdbSTheodore Ts'o if (!ext4_kset) 41576fd058f7STheodore Ts'o goto out4; 41589f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 4159c9de560dSAlex Tomas err = init_ext4_mballoc(); 4160ac27a0ecSDave Kleikamp if (err) 41616fd058f7STheodore Ts'o goto out3; 4162c9de560dSAlex Tomas 4163c9de560dSAlex Tomas err = init_ext4_xattr(); 4164c9de560dSAlex Tomas if (err) 4165c9de560dSAlex Tomas goto out2; 4166ac27a0ecSDave Kleikamp err = init_inodecache(); 4167ac27a0ecSDave Kleikamp if (err) 4168ac27a0ecSDave Kleikamp goto out1; 416924b58424STheodore Ts'o register_as_ext2(); 417024b58424STheodore Ts'o register_as_ext3(); 417103010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 4172ac27a0ecSDave Kleikamp if (err) 4173ac27a0ecSDave Kleikamp goto out; 4174ac27a0ecSDave Kleikamp return 0; 4175ac27a0ecSDave Kleikamp out: 417624b58424STheodore Ts'o unregister_as_ext2(); 417724b58424STheodore Ts'o unregister_as_ext3(); 4178ac27a0ecSDave Kleikamp destroy_inodecache(); 4179ac27a0ecSDave Kleikamp out1: 4180617ba13bSMingming Cao exit_ext4_xattr(); 4181c9de560dSAlex Tomas out2: 4182c9de560dSAlex Tomas exit_ext4_mballoc(); 41836fd058f7STheodore Ts'o out3: 41846fd058f7STheodore Ts'o remove_proc_entry("fs/ext4", NULL); 41856fd058f7STheodore Ts'o kset_unregister(ext4_kset); 41866fd058f7STheodore Ts'o out4: 41876fd058f7STheodore Ts'o exit_ext4_system_zone(); 4188ac27a0ecSDave Kleikamp return err; 4189ac27a0ecSDave Kleikamp } 4190ac27a0ecSDave Kleikamp 4191617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 4192ac27a0ecSDave Kleikamp { 419324b58424STheodore Ts'o unregister_as_ext2(); 419424b58424STheodore Ts'o unregister_as_ext3(); 419503010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 4196ac27a0ecSDave Kleikamp destroy_inodecache(); 4197617ba13bSMingming Cao exit_ext4_xattr(); 4198c9de560dSAlex Tomas exit_ext4_mballoc(); 41999f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 42003197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 42016fd058f7STheodore Ts'o exit_ext4_system_zone(); 4202ac27a0ecSDave Kleikamp } 4203ac27a0ecSDave Kleikamp 4204ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 420583982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 4206ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 4207617ba13bSMingming Cao module_init(init_ext4_fs) 4208617ba13bSMingming Cao module_exit(exit_ext4_fs) 4209