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); 71ac27a0ecSDave Kleikamp 72bd81d8eeSLaurent Vivier 738fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 748fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 75bd81d8eeSLaurent Vivier { 763a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 778fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 788fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 79bd81d8eeSLaurent Vivier } 80bd81d8eeSLaurent Vivier 818fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 828fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 83bd81d8eeSLaurent Vivier { 845272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 858fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 868fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 87bd81d8eeSLaurent Vivier } 88bd81d8eeSLaurent Vivier 898fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 908fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 91bd81d8eeSLaurent Vivier { 925272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 938fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 948fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 95bd81d8eeSLaurent Vivier } 96bd81d8eeSLaurent Vivier 97560671a0SAneesh Kumar K.V __u32 ext4_free_blks_count(struct super_block *sb, 98560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 99560671a0SAneesh Kumar K.V { 100560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 101560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 102560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 103560671a0SAneesh Kumar K.V } 104560671a0SAneesh Kumar K.V 105560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 106560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 107560671a0SAneesh Kumar K.V { 108560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 109560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 110560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 111560671a0SAneesh Kumar K.V } 112560671a0SAneesh Kumar K.V 113560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 114560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 115560671a0SAneesh Kumar K.V { 116560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 117560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 118560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 119560671a0SAneesh Kumar K.V } 120560671a0SAneesh Kumar K.V 121560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 122560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 123560671a0SAneesh Kumar K.V { 124560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 125560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 126560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 127560671a0SAneesh Kumar K.V } 128560671a0SAneesh Kumar K.V 1298fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 1308fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 131bd81d8eeSLaurent Vivier { 1323a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 1338fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1348fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 135bd81d8eeSLaurent Vivier } 136bd81d8eeSLaurent Vivier 1378fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1388fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 139bd81d8eeSLaurent Vivier { 1405272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1418fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1428fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 143bd81d8eeSLaurent Vivier } 144bd81d8eeSLaurent Vivier 1458fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1468fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 147bd81d8eeSLaurent Vivier { 1485272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1498fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1508fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 151bd81d8eeSLaurent Vivier } 152bd81d8eeSLaurent Vivier 153560671a0SAneesh Kumar K.V void ext4_free_blks_set(struct super_block *sb, 154560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 155560671a0SAneesh Kumar K.V { 156560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 157560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 158560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 159560671a0SAneesh Kumar K.V } 160560671a0SAneesh Kumar K.V 161560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 162560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 163560671a0SAneesh Kumar K.V { 164560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 165560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 166560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 167560671a0SAneesh Kumar K.V } 168560671a0SAneesh Kumar K.V 169560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 170560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 171560671a0SAneesh Kumar K.V { 172560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 173560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 174560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 175560671a0SAneesh Kumar K.V } 176560671a0SAneesh Kumar K.V 177560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 178560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 179560671a0SAneesh Kumar K.V { 180560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 181560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 182560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 183560671a0SAneesh Kumar K.V } 184560671a0SAneesh Kumar K.V 185d3d1faf6SCurt Wohlgemuth 186d3d1faf6SCurt Wohlgemuth /* Just increment the non-pointer handle value */ 187d3d1faf6SCurt Wohlgemuth static handle_t *ext4_get_nojournal(void) 188d3d1faf6SCurt Wohlgemuth { 189d3d1faf6SCurt Wohlgemuth handle_t *handle = current->journal_info; 190d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 191d3d1faf6SCurt Wohlgemuth 192d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); 193d3d1faf6SCurt Wohlgemuth 194d3d1faf6SCurt Wohlgemuth ref_cnt++; 195d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 196d3d1faf6SCurt Wohlgemuth 197d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 198d3d1faf6SCurt Wohlgemuth return handle; 199d3d1faf6SCurt Wohlgemuth } 200d3d1faf6SCurt Wohlgemuth 201d3d1faf6SCurt Wohlgemuth 202d3d1faf6SCurt Wohlgemuth /* Decrement the non-pointer handle value */ 203d3d1faf6SCurt Wohlgemuth static void ext4_put_nojournal(handle_t *handle) 204d3d1faf6SCurt Wohlgemuth { 205d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 206d3d1faf6SCurt Wohlgemuth 207d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt == 0); 208d3d1faf6SCurt Wohlgemuth 209d3d1faf6SCurt Wohlgemuth ref_cnt--; 210d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 211d3d1faf6SCurt Wohlgemuth 212d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 213d3d1faf6SCurt Wohlgemuth } 214d3d1faf6SCurt Wohlgemuth 215ac27a0ecSDave Kleikamp /* 216dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 217ac27a0ecSDave Kleikamp * 218ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 219ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 220ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 221ac27a0ecSDave Kleikamp * appropriate. 222ac27a0ecSDave Kleikamp */ 223617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 224ac27a0ecSDave Kleikamp { 225ac27a0ecSDave Kleikamp journal_t *journal; 226ac27a0ecSDave Kleikamp 227ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 228ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 229ac27a0ecSDave Kleikamp 230ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 231ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 232ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 233617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2340390131bSFrank Mayhar if (journal) { 235ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 2360b8e58a1SAndreas Dilger ext4_abort(sb, __func__, "Detected aborted journal"); 237ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 238ac27a0ecSDave Kleikamp } 239dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 240ac27a0ecSDave Kleikamp } 241d3d1faf6SCurt Wohlgemuth return ext4_get_nojournal(); 2420390131bSFrank Mayhar } 243ac27a0ecSDave Kleikamp 244ac27a0ecSDave Kleikamp /* 245ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 246dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 247ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 248ac27a0ecSDave Kleikamp * appropriate. 249ac27a0ecSDave Kleikamp */ 250617ba13bSMingming Cao int __ext4_journal_stop(const char *where, handle_t *handle) 251ac27a0ecSDave Kleikamp { 252ac27a0ecSDave Kleikamp struct super_block *sb; 253ac27a0ecSDave Kleikamp int err; 254ac27a0ecSDave Kleikamp int rc; 255ac27a0ecSDave Kleikamp 2560390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 257d3d1faf6SCurt Wohlgemuth ext4_put_nojournal(handle); 2580390131bSFrank Mayhar return 0; 2590390131bSFrank Mayhar } 260ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 261ac27a0ecSDave Kleikamp err = handle->h_err; 262dab291afSMingming Cao rc = jbd2_journal_stop(handle); 263ac27a0ecSDave Kleikamp 264ac27a0ecSDave Kleikamp if (!err) 265ac27a0ecSDave Kleikamp err = rc; 266ac27a0ecSDave Kleikamp if (err) 267617ba13bSMingming Cao __ext4_std_error(sb, where, err); 268ac27a0ecSDave Kleikamp return err; 269ac27a0ecSDave Kleikamp } 270ac27a0ecSDave Kleikamp 271617ba13bSMingming Cao void ext4_journal_abort_handle(const char *caller, const char *err_fn, 272ac27a0ecSDave Kleikamp struct buffer_head *bh, handle_t *handle, int err) 273ac27a0ecSDave Kleikamp { 274ac27a0ecSDave Kleikamp char nbuf[16]; 275617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 276ac27a0ecSDave Kleikamp 2770390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 2780390131bSFrank Mayhar 279ac27a0ecSDave Kleikamp if (bh) 280ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 281ac27a0ecSDave Kleikamp 282ac27a0ecSDave Kleikamp if (!handle->h_err) 283ac27a0ecSDave Kleikamp handle->h_err = err; 284ac27a0ecSDave Kleikamp 285ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 286ac27a0ecSDave Kleikamp return; 287ac27a0ecSDave Kleikamp 288ac27a0ecSDave Kleikamp printk(KERN_ERR "%s: aborting transaction: %s in %s\n", 289ac27a0ecSDave Kleikamp caller, errstr, err_fn); 290ac27a0ecSDave Kleikamp 291dab291afSMingming Cao jbd2_journal_abort_handle(handle); 292ac27a0ecSDave Kleikamp } 293ac27a0ecSDave Kleikamp 294ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 295ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 296ac27a0ecSDave Kleikamp * 297ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 298617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 299ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 300ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 301ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 302ac27a0ecSDave Kleikamp * write out the superblock safely. 303ac27a0ecSDave Kleikamp * 304dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 305ac27a0ecSDave Kleikamp * the journal instead. On recovery, the journal will compain about 306ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 307ac27a0ecSDave Kleikamp */ 308ac27a0ecSDave Kleikamp 309617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 310ac27a0ecSDave Kleikamp { 311617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 312ac27a0ecSDave Kleikamp 313617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 314617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 315ac27a0ecSDave Kleikamp 316ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 317ac27a0ecSDave Kleikamp return; 318ac27a0ecSDave Kleikamp 319ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 320617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 321ac27a0ecSDave Kleikamp 3224ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 323ac27a0ecSDave Kleikamp if (journal) 324dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 325ac27a0ecSDave Kleikamp } 326ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 327b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 328ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 329ac27a0ecSDave Kleikamp } 330e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 331ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 332617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 333ac27a0ecSDave Kleikamp sb->s_id); 334ac27a0ecSDave Kleikamp } 335ac27a0ecSDave Kleikamp 33612062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 337ac27a0ecSDave Kleikamp const char *fmt, ...) 338ac27a0ecSDave Kleikamp { 339ac27a0ecSDave Kleikamp va_list args; 340ac27a0ecSDave Kleikamp 341ac27a0ecSDave Kleikamp va_start(args, fmt); 342617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 343ac27a0ecSDave Kleikamp vprintk(fmt, args); 344ac27a0ecSDave Kleikamp printk("\n"); 345ac27a0ecSDave Kleikamp va_end(args); 346ac27a0ecSDave Kleikamp 347617ba13bSMingming Cao ext4_handle_error(sb); 348ac27a0ecSDave Kleikamp } 349ac27a0ecSDave Kleikamp 350273df556SFrank Mayhar void ext4_error_inode(const char *function, struct inode *inode, 351273df556SFrank Mayhar const char *fmt, ...) 352273df556SFrank Mayhar { 353273df556SFrank Mayhar va_list args; 354273df556SFrank Mayhar 355273df556SFrank Mayhar va_start(args, fmt); 356273df556SFrank Mayhar printk(KERN_CRIT "EXT4-fs error (device %s): %s: inode #%lu: (comm %s) ", 357273df556SFrank Mayhar inode->i_sb->s_id, function, inode->i_ino, current->comm); 358273df556SFrank Mayhar vprintk(fmt, args); 359273df556SFrank Mayhar printk("\n"); 360273df556SFrank Mayhar va_end(args); 361273df556SFrank Mayhar 362273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 363273df556SFrank Mayhar } 364273df556SFrank Mayhar 365273df556SFrank Mayhar void ext4_error_file(const char *function, struct file *file, 366273df556SFrank Mayhar const char *fmt, ...) 367273df556SFrank Mayhar { 368273df556SFrank Mayhar va_list args; 369273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 370273df556SFrank Mayhar char pathname[80], *path; 371273df556SFrank Mayhar 372273df556SFrank Mayhar va_start(args, fmt); 373273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 374273df556SFrank Mayhar if (!path) 375273df556SFrank Mayhar path = "(unknown)"; 376273df556SFrank Mayhar printk(KERN_CRIT 377273df556SFrank Mayhar "EXT4-fs error (device %s): %s: inode #%lu (comm %s path %s): ", 378273df556SFrank Mayhar inode->i_sb->s_id, function, inode->i_ino, current->comm, path); 379273df556SFrank Mayhar vprintk(fmt, args); 380273df556SFrank Mayhar printk("\n"); 381273df556SFrank Mayhar va_end(args); 382273df556SFrank Mayhar 383273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 384273df556SFrank Mayhar } 385273df556SFrank Mayhar 386617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 387ac27a0ecSDave Kleikamp char nbuf[16]) 388ac27a0ecSDave Kleikamp { 389ac27a0ecSDave Kleikamp char *errstr = NULL; 390ac27a0ecSDave Kleikamp 391ac27a0ecSDave Kleikamp switch (errno) { 392ac27a0ecSDave Kleikamp case -EIO: 393ac27a0ecSDave Kleikamp errstr = "IO failure"; 394ac27a0ecSDave Kleikamp break; 395ac27a0ecSDave Kleikamp case -ENOMEM: 396ac27a0ecSDave Kleikamp errstr = "Out of memory"; 397ac27a0ecSDave Kleikamp break; 398ac27a0ecSDave Kleikamp case -EROFS: 39978f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 40078f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 401ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 402ac27a0ecSDave Kleikamp else 403ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 404ac27a0ecSDave Kleikamp break; 405ac27a0ecSDave Kleikamp default: 406ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 407ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 408ac27a0ecSDave Kleikamp * NULL. */ 409ac27a0ecSDave Kleikamp if (nbuf) { 410ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 411ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 412ac27a0ecSDave Kleikamp errstr = nbuf; 413ac27a0ecSDave Kleikamp } 414ac27a0ecSDave Kleikamp break; 415ac27a0ecSDave Kleikamp } 416ac27a0ecSDave Kleikamp 417ac27a0ecSDave Kleikamp return errstr; 418ac27a0ecSDave Kleikamp } 419ac27a0ecSDave Kleikamp 420617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 421ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 422ac27a0ecSDave Kleikamp 4232b2d6d01STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, int errno) 424ac27a0ecSDave Kleikamp { 425ac27a0ecSDave Kleikamp char nbuf[16]; 426ac27a0ecSDave Kleikamp const char *errstr; 427ac27a0ecSDave Kleikamp 428ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 429ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 430ac27a0ecSDave Kleikamp * an error. */ 431ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 432ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 433ac27a0ecSDave Kleikamp return; 434ac27a0ecSDave Kleikamp 435617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 436617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", 437ac27a0ecSDave Kleikamp sb->s_id, function, errstr); 438ac27a0ecSDave Kleikamp 439617ba13bSMingming Cao ext4_handle_error(sb); 440ac27a0ecSDave Kleikamp } 441ac27a0ecSDave Kleikamp 442ac27a0ecSDave Kleikamp /* 443617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 444ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 445ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 446ac27a0ecSDave Kleikamp * 447ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 448ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 449ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 450ac27a0ecSDave Kleikamp */ 451ac27a0ecSDave Kleikamp 452617ba13bSMingming Cao void ext4_abort(struct super_block *sb, const char *function, 453ac27a0ecSDave Kleikamp const char *fmt, ...) 454ac27a0ecSDave Kleikamp { 455ac27a0ecSDave Kleikamp va_list args; 456ac27a0ecSDave Kleikamp 457ac27a0ecSDave Kleikamp va_start(args, fmt); 458617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 459ac27a0ecSDave Kleikamp vprintk(fmt, args); 460ac27a0ecSDave Kleikamp printk("\n"); 461ac27a0ecSDave Kleikamp va_end(args); 462ac27a0ecSDave Kleikamp 463ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 464617ba13bSMingming Cao panic("EXT4-fs panic from previous error\n"); 465ac27a0ecSDave Kleikamp 466ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 467ac27a0ecSDave Kleikamp return; 468ac27a0ecSDave Kleikamp 469b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 470617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 471ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4724ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 473ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 474dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 475ac27a0ecSDave Kleikamp } 476ac27a0ecSDave Kleikamp 477b31e1552SEric Sandeen void ext4_msg (struct super_block * sb, const char *prefix, 478b31e1552SEric Sandeen const char *fmt, ...) 479b31e1552SEric Sandeen { 480b31e1552SEric Sandeen va_list args; 481b31e1552SEric Sandeen 482b31e1552SEric Sandeen va_start(args, fmt); 483b31e1552SEric Sandeen printk("%sEXT4-fs (%s): ", prefix, sb->s_id); 484b31e1552SEric Sandeen vprintk(fmt, args); 485b31e1552SEric Sandeen printk("\n"); 486b31e1552SEric Sandeen va_end(args); 487b31e1552SEric Sandeen } 488b31e1552SEric Sandeen 48912062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 490ac27a0ecSDave Kleikamp const char *fmt, ...) 491ac27a0ecSDave Kleikamp { 492ac27a0ecSDave Kleikamp va_list args; 493ac27a0ecSDave Kleikamp 494ac27a0ecSDave Kleikamp va_start(args, fmt); 495617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", 496ac27a0ecSDave Kleikamp sb->s_id, function); 497ac27a0ecSDave Kleikamp vprintk(fmt, args); 498ac27a0ecSDave Kleikamp printk("\n"); 499ac27a0ecSDave Kleikamp va_end(args); 500ac27a0ecSDave Kleikamp } 501ac27a0ecSDave Kleikamp 5025d1b1b3fSAneesh Kumar K.V void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, 5035d1b1b3fSAneesh Kumar K.V const char *function, const char *fmt, ...) 5045d1b1b3fSAneesh Kumar K.V __releases(bitlock) 5055d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 5065d1b1b3fSAneesh Kumar K.V { 5075d1b1b3fSAneesh Kumar K.V va_list args; 5085d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 5095d1b1b3fSAneesh Kumar K.V 5105d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 5115d1b1b3fSAneesh Kumar K.V printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 5125d1b1b3fSAneesh Kumar K.V vprintk(fmt, args); 5135d1b1b3fSAneesh Kumar K.V printk("\n"); 5145d1b1b3fSAneesh Kumar K.V va_end(args); 5155d1b1b3fSAneesh Kumar K.V 5165d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 5175d1b1b3fSAneesh Kumar K.V EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 5185d1b1b3fSAneesh Kumar K.V es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 519e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 5205d1b1b3fSAneesh Kumar K.V return; 5215d1b1b3fSAneesh Kumar K.V } 5225d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 5235d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 5245d1b1b3fSAneesh Kumar K.V /* 5255d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 5265d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 5275d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 5285d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 5295d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 5305d1b1b3fSAneesh Kumar K.V * ext4_grp_locked_error() to distinguish beween the 5315d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 5325d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 5335d1b1b3fSAneesh Kumar K.V * more appropriate error code. 5345d1b1b3fSAneesh Kumar K.V */ 5355d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 5365d1b1b3fSAneesh Kumar K.V return; 5375d1b1b3fSAneesh Kumar K.V } 5385d1b1b3fSAneesh Kumar K.V 539617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 540ac27a0ecSDave Kleikamp { 541617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 542ac27a0ecSDave Kleikamp 543617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 544ac27a0ecSDave Kleikamp return; 545ac27a0ecSDave Kleikamp 54612062dddSEric Sandeen ext4_warning(sb, 547ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 548ac27a0ecSDave Kleikamp "running e2fsck is recommended", 549617ba13bSMingming Cao EXT4_DYNAMIC_REV); 550ac27a0ecSDave Kleikamp 551617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 552617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 553617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 554ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 555ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 556ac27a0ecSDave Kleikamp 557ac27a0ecSDave Kleikamp /* 558ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 559ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 560ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 561ac27a0ecSDave Kleikamp */ 562ac27a0ecSDave Kleikamp } 563ac27a0ecSDave Kleikamp 564ac27a0ecSDave Kleikamp /* 565ac27a0ecSDave Kleikamp * Open the external journal device 566ac27a0ecSDave Kleikamp */ 567b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 568ac27a0ecSDave Kleikamp { 569ac27a0ecSDave Kleikamp struct block_device *bdev; 570ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 571ac27a0ecSDave Kleikamp 572ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 573ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 574ac27a0ecSDave Kleikamp goto fail; 575ac27a0ecSDave Kleikamp return bdev; 576ac27a0ecSDave Kleikamp 577ac27a0ecSDave Kleikamp fail: 578b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 579ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 580ac27a0ecSDave Kleikamp return NULL; 581ac27a0ecSDave Kleikamp } 582ac27a0ecSDave Kleikamp 583ac27a0ecSDave Kleikamp /* 584ac27a0ecSDave Kleikamp * Release the journal device 585ac27a0ecSDave Kleikamp */ 586617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 587ac27a0ecSDave Kleikamp { 588ac27a0ecSDave Kleikamp bd_release(bdev); 5899a1c3542SAl Viro return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 590ac27a0ecSDave Kleikamp } 591ac27a0ecSDave Kleikamp 592617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 593ac27a0ecSDave Kleikamp { 594ac27a0ecSDave Kleikamp struct block_device *bdev; 595ac27a0ecSDave Kleikamp int ret = -ENODEV; 596ac27a0ecSDave Kleikamp 597ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 598ac27a0ecSDave Kleikamp if (bdev) { 599617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 600ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 601ac27a0ecSDave Kleikamp } 602ac27a0ecSDave Kleikamp return ret; 603ac27a0ecSDave Kleikamp } 604ac27a0ecSDave Kleikamp 605ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 606ac27a0ecSDave Kleikamp { 607617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 608ac27a0ecSDave Kleikamp } 609ac27a0ecSDave Kleikamp 610617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 611ac27a0ecSDave Kleikamp { 612ac27a0ecSDave Kleikamp struct list_head *l; 613ac27a0ecSDave Kleikamp 614b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 615ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 616ac27a0ecSDave Kleikamp 617ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 618ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 619ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 620ac27a0ecSDave Kleikamp printk(KERN_ERR " " 621ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 622ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 623ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 624ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 625ac27a0ecSDave Kleikamp } 626ac27a0ecSDave Kleikamp } 627ac27a0ecSDave Kleikamp 628617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 629ac27a0ecSDave Kleikamp { 630617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 631617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 632ef2cabf7SHidehiro Kawai int i, err; 633ac27a0ecSDave Kleikamp 6344c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 6354c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 6364c0425ffSMingming Cao 637a9e220f8SAl Viro lock_super(sb); 6386cfd0148SChristoph Hellwig lock_kernel(); 6398c85e125SChristoph Hellwig if (sb->s_dirt) 640ebc1ac16SChristoph Hellwig ext4_commit_super(sb, 1); 6418c85e125SChristoph Hellwig 6420390131bSFrank Mayhar if (sbi->s_journal) { 643ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 64447b4a50bSJan Kara sbi->s_journal = NULL; 645ef2cabf7SHidehiro Kawai if (err < 0) 6460390131bSFrank Mayhar ext4_abort(sb, __func__, 6470390131bSFrank Mayhar "Couldn't clean up the journal"); 6480390131bSFrank Mayhar } 649d4edac31SJosef Bacik 650d4edac31SJosef Bacik ext4_release_system_zone(sb); 651d4edac31SJosef Bacik ext4_mb_release(sb); 652d4edac31SJosef Bacik ext4_ext_release(sb); 653d4edac31SJosef Bacik ext4_xattr_put_super(sb); 654d4edac31SJosef Bacik 655ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 656617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 657ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 658e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 659ac27a0ecSDave Kleikamp } 660240799cdSTheodore Ts'o if (sbi->s_proc) { 6619f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 662240799cdSTheodore Ts'o } 6633197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 664ac27a0ecSDave Kleikamp 665ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 666ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 667ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 668c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 669c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 670c5ca7c76STheodore Ts'o else 671772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 672ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 673ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 674ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 6756bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 676ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 677ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 678ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 679ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 680ac27a0ecSDave Kleikamp #endif 681ac27a0ecSDave Kleikamp 682ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 683ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 684ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 685ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 686ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 687ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 688ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 689ac27a0ecSDave Kleikamp 690f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 691ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 692ac27a0ecSDave Kleikamp /* 693ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 694ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 695ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 696ac27a0ecSDave Kleikamp */ 697ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 698f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 699617ba13bSMingming Cao ext4_blkdev_remove(sbi); 700ac27a0ecSDave Kleikamp } 701ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 7023197ebdbSTheodore Ts'o /* 7033197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 7043197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 7053197ebdbSTheodore Ts'o */ 7063197ebdbSTheodore Ts'o unlock_kernel(); 7073197ebdbSTheodore Ts'o unlock_super(sb); 7083197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 7093197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 710705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 711ac27a0ecSDave Kleikamp kfree(sbi); 712ac27a0ecSDave Kleikamp } 713ac27a0ecSDave Kleikamp 714e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 715ac27a0ecSDave Kleikamp 716ac27a0ecSDave Kleikamp /* 717ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 718ac27a0ecSDave Kleikamp */ 719617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 720ac27a0ecSDave Kleikamp { 721617ba13bSMingming Cao struct ext4_inode_info *ei; 722ac27a0ecSDave Kleikamp 723e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 724ac27a0ecSDave Kleikamp if (!ei) 725ac27a0ecSDave Kleikamp return NULL; 7260b8e58a1SAndreas Dilger 727ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 72891246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 729a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 730c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 731c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 7320390131bSFrank Mayhar /* 7330390131bSFrank Mayhar * Note: We can be called before EXT4_SB(sb)->s_journal is set, 7340390131bSFrank Mayhar * therefore it can be null here. Don't check it, just initialize 7350390131bSFrank Mayhar * jinode. 7360390131bSFrank Mayhar */ 737678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 738d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 739d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 740d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 7419d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 742d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 743d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 744a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 745a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 746a9e7f447SDmitry Monakhov #endif 747c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 748744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 7498d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 750b436b9beSJan Kara ei->i_sync_tid = 0; 751b436b9beSJan Kara ei->i_datasync_tid = 0; 7520b8e58a1SAndreas Dilger 753ac27a0ecSDave Kleikamp return &ei->vfs_inode; 754ac27a0ecSDave Kleikamp } 755ac27a0ecSDave Kleikamp 756617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 757ac27a0ecSDave Kleikamp { 7589f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 759b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 760b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 761b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 7629f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 7639f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 7649f7dd93dSVasily Averin true); 7659f7dd93dSVasily Averin dump_stack(); 7669f7dd93dSVasily Averin } 767617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 768ac27a0ecSDave Kleikamp } 769ac27a0ecSDave Kleikamp 77051cc5068SAlexey Dobriyan static void init_once(void *foo) 771ac27a0ecSDave Kleikamp { 772617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 773ac27a0ecSDave Kleikamp 774ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 77503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 776ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 777ac27a0ecSDave Kleikamp #endif 7780e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 779ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 780ac27a0ecSDave Kleikamp } 781ac27a0ecSDave Kleikamp 782ac27a0ecSDave Kleikamp static int init_inodecache(void) 783ac27a0ecSDave Kleikamp { 784617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 785617ba13bSMingming Cao sizeof(struct ext4_inode_info), 786ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 787ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 78820c2df83SPaul Mundt init_once); 789617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 790ac27a0ecSDave Kleikamp return -ENOMEM; 791ac27a0ecSDave Kleikamp return 0; 792ac27a0ecSDave Kleikamp } 793ac27a0ecSDave Kleikamp 794ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 795ac27a0ecSDave Kleikamp { 796617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 797ac27a0ecSDave Kleikamp } 798ac27a0ecSDave Kleikamp 799617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 800ac27a0ecSDave Kleikamp { 801c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 8020390131bSFrank Mayhar if (EXT4_JOURNAL(inode)) 803678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 804678aaf48SJan Kara &EXT4_I(inode)->jinode); 805ac27a0ecSDave Kleikamp } 806ac27a0ecSDave Kleikamp 8072b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 8082b2d6d01STheodore Ts'o struct super_block *sb) 809ac27a0ecSDave Kleikamp { 810ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 811617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 812ac27a0ecSDave Kleikamp 8135a20bdfcSJan Kara if (sbi->s_jquota_fmt) { 8145a20bdfcSJan Kara char *fmtname = ""; 8155a20bdfcSJan Kara 8165a20bdfcSJan Kara switch (sbi->s_jquota_fmt) { 8175a20bdfcSJan Kara case QFMT_VFS_OLD: 8185a20bdfcSJan Kara fmtname = "vfsold"; 8195a20bdfcSJan Kara break; 8205a20bdfcSJan Kara case QFMT_VFS_V0: 8215a20bdfcSJan Kara fmtname = "vfsv0"; 8225a20bdfcSJan Kara break; 8235a20bdfcSJan Kara case QFMT_VFS_V1: 8245a20bdfcSJan Kara fmtname = "vfsv1"; 8255a20bdfcSJan Kara break; 8265a20bdfcSJan Kara } 8275a20bdfcSJan Kara seq_printf(seq, ",jqfmt=%s", fmtname); 8285a20bdfcSJan Kara } 829ac27a0ecSDave Kleikamp 830ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 831ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 832ac27a0ecSDave Kleikamp 833ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 834ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 835ac27a0ecSDave Kleikamp 836482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA)) 837ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 838ac27a0ecSDave Kleikamp 839482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA)) 840ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 841ac27a0ecSDave Kleikamp #endif 842ac27a0ecSDave Kleikamp } 843ac27a0ecSDave Kleikamp 844d9c9bef1SMiklos Szeredi /* 845d9c9bef1SMiklos Szeredi * Show an option if 846d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 847d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 848d9c9bef1SMiklos Szeredi */ 849617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 850ac27a0ecSDave Kleikamp { 851aa22df2cSAneesh Kumar K.V int def_errors; 852aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 853ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 854d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 855d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 856d9c9bef1SMiklos Szeredi 857d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 858aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 859d9c9bef1SMiklos Szeredi 860d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 861d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 862d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 863d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 864aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 865d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 866d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 867d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 868d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 869d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 870d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 871d9c9bef1SMiklos Szeredi } 872d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 873d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 874d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 875d9c9bef1SMiklos Szeredi } 876bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 877d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 878bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 879d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 880bb4f397aSAneesh Kumar K.V } 881bb4f397aSAneesh Kumar K.V } 882aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 883bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 884aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 885d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 886aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 887d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 888aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 889d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 890d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 891d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 89203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 893aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 894aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 895d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 896d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 897d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 898d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 899d9c9bef1SMiklos Szeredi } 900d9c9bef1SMiklos Szeredi #endif 90103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 902aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 903d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 904d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 905d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 906d9c9bef1SMiklos Szeredi #endif 90730773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 908d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 909d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 910d9c9bef1SMiklos Szeredi } 91130773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 91230773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 91330773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 91430773840STheodore Ts'o } 91530773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 91630773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 91730773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 91830773840STheodore Ts'o } 91930773840STheodore Ts'o 920571640caSEric Sandeen /* 921571640caSEric Sandeen * We're changing the default of barrier mount option, so 922571640caSEric Sandeen * let's always display its mount state so it's clear what its 923571640caSEric Sandeen * status is. 924571640caSEric Sandeen */ 925571640caSEric Sandeen seq_puts(seq, ",barrier="); 926571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 927cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 928cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 929d9c9bef1SMiklos Szeredi if (test_opt(sb, NOBH)) 930d9c9bef1SMiklos Szeredi seq_puts(seq, ",nobh"); 93125ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 93225ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 933dd919b98SAneesh Kumar K.V if (!test_opt(sb, DELALLOC)) 934dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 935dd919b98SAneesh Kumar K.V 936ac27a0ecSDave Kleikamp 937cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 938cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 939aa22df2cSAneesh Kumar K.V /* 940aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 941aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 942aa22df2cSAneesh Kumar K.V */ 943617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 944ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 945617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 946ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 947617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 948ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 949ac27a0ecSDave Kleikamp 950240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 951240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 952240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 953240799cdSTheodore Ts'o 9545bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 9555bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 9565bf5683aSHidehiro Kawai 957afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 95806705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 959afd4672dSTheodore Ts'o 9605328e635SEric Sandeen if (test_opt(sb, DISCARD)) 9615328e635SEric Sandeen seq_puts(seq, ",discard"); 9625328e635SEric Sandeen 963e3bb52aeSEric Sandeen if (test_opt(sb, NOLOAD)) 964e3bb52aeSEric Sandeen seq_puts(seq, ",norecovery"); 965e3bb52aeSEric Sandeen 966744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) 967744692dcSJiaying Zhang seq_puts(seq, ",dioread_nolock"); 968744692dcSJiaying Zhang 969617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 9700b8e58a1SAndreas Dilger 971ac27a0ecSDave Kleikamp return 0; 972ac27a0ecSDave Kleikamp } 973ac27a0ecSDave Kleikamp 9741b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 9751b961ac0SChristoph Hellwig u64 ino, u32 generation) 976ac27a0ecSDave Kleikamp { 977ac27a0ecSDave Kleikamp struct inode *inode; 978ac27a0ecSDave Kleikamp 979617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 980ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 981617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 982ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 983ac27a0ecSDave Kleikamp 984ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 985ac27a0ecSDave Kleikamp * 986617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 987ac27a0ecSDave Kleikamp * deleted, so we should be safe. 988ac27a0ecSDave Kleikamp * 989ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 990ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 991ac27a0ecSDave Kleikamp */ 9921d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 9931d1fe1eeSDavid Howells if (IS_ERR(inode)) 9941d1fe1eeSDavid Howells return ERR_CAST(inode); 9951d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 996ac27a0ecSDave Kleikamp iput(inode); 997ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 998ac27a0ecSDave Kleikamp } 9991b961ac0SChristoph Hellwig 10001b961ac0SChristoph Hellwig return inode; 1001ac27a0ecSDave Kleikamp } 10021b961ac0SChristoph Hellwig 10031b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10041b961ac0SChristoph Hellwig int fh_len, int fh_type) 10051b961ac0SChristoph Hellwig { 10061b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10071b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10081b961ac0SChristoph Hellwig } 10091b961ac0SChristoph Hellwig 10101b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10111b961ac0SChristoph Hellwig int fh_len, int fh_type) 10121b961ac0SChristoph Hellwig { 10131b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10141b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1015ac27a0ecSDave Kleikamp } 1016ac27a0ecSDave Kleikamp 1017c39a7f84SToshiyuki Okajima /* 1018c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1019c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1020c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1021c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1022c39a7f84SToshiyuki Okajima */ 10230b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10240b8e58a1SAndreas Dilger gfp_t wait) 1025c39a7f84SToshiyuki Okajima { 1026c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1027c39a7f84SToshiyuki Okajima 1028c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1029c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1030c39a7f84SToshiyuki Okajima return 0; 1031c39a7f84SToshiyuki Okajima if (journal) 1032c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1033c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1034c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1035c39a7f84SToshiyuki Okajima } 1036c39a7f84SToshiyuki Okajima 1037ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1038ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1039ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1040ac27a0ecSDave Kleikamp 1041617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1042617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1043617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1044617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1045617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 10466f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 10476f28e087SJan Kara char *path, int remount); 1048617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1049617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1050ac27a0ecSDave Kleikamp size_t len, loff_t off); 1051617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1052ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1053ac27a0ecSDave Kleikamp 105461e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 1055edf72453SJan Kara .initialize = dquot_initialize, 1056edf72453SJan Kara .drop = dquot_drop, 1057ac27a0ecSDave Kleikamp .alloc_space = dquot_alloc_space, 105860e58e0fSMingming Cao .reserve_space = dquot_reserve_space, 105960e58e0fSMingming Cao .claim_space = dquot_claim_space, 106060e58e0fSMingming Cao .release_rsv = dquot_release_reserved_space, 1061a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 106260e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1063a9e7f447SDmitry Monakhov #endif 1064ac27a0ecSDave Kleikamp .alloc_inode = dquot_alloc_inode, 1065ac27a0ecSDave Kleikamp .free_space = dquot_free_space, 1066ac27a0ecSDave Kleikamp .free_inode = dquot_free_inode, 1067ac27a0ecSDave Kleikamp .transfer = dquot_transfer, 1068617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1069617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1070617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1071617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1072a5b5ee32SJan Kara .write_info = ext4_write_info, 1073a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1074a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1075ac27a0ecSDave Kleikamp }; 1076ac27a0ecSDave Kleikamp 10770d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1078617ba13bSMingming Cao .quota_on = ext4_quota_on, 1079ac27a0ecSDave Kleikamp .quota_off = vfs_quota_off, 1080ac27a0ecSDave Kleikamp .quota_sync = vfs_quota_sync, 1081ac27a0ecSDave Kleikamp .get_info = vfs_get_dqinfo, 1082ac27a0ecSDave Kleikamp .set_info = vfs_set_dqinfo, 1083ac27a0ecSDave Kleikamp .get_dqblk = vfs_get_dqblk, 1084ac27a0ecSDave Kleikamp .set_dqblk = vfs_set_dqblk 1085ac27a0ecSDave Kleikamp }; 1086ac27a0ecSDave Kleikamp #endif 1087ac27a0ecSDave Kleikamp 1088ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1089617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1090617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1091617ba13bSMingming Cao .write_inode = ext4_write_inode, 1092617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 1093617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 1094617ba13bSMingming Cao .put_super = ext4_put_super, 1095617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1096c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1097c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1098617ba13bSMingming Cao .statfs = ext4_statfs, 1099617ba13bSMingming Cao .remount_fs = ext4_remount, 1100617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 1101617ba13bSMingming Cao .show_options = ext4_show_options, 1102ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1103617ba13bSMingming Cao .quota_read = ext4_quota_read, 1104617ba13bSMingming Cao .quota_write = ext4_quota_write, 1105ac27a0ecSDave Kleikamp #endif 1106c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1107ac27a0ecSDave Kleikamp }; 1108ac27a0ecSDave Kleikamp 11099ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 11109ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 11119ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 11129ca92389STheodore Ts'o .write_inode = ext4_write_inode, 11139ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 11149ca92389STheodore Ts'o .delete_inode = ext4_delete_inode, 11159ca92389STheodore Ts'o .write_super = ext4_write_super, 11169ca92389STheodore Ts'o .put_super = ext4_put_super, 11179ca92389STheodore Ts'o .statfs = ext4_statfs, 11189ca92389STheodore Ts'o .remount_fs = ext4_remount, 11199ca92389STheodore Ts'o .clear_inode = ext4_clear_inode, 11209ca92389STheodore Ts'o .show_options = ext4_show_options, 11219ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 11229ca92389STheodore Ts'o .quota_read = ext4_quota_read, 11239ca92389STheodore Ts'o .quota_write = ext4_quota_write, 11249ca92389STheodore Ts'o #endif 11259ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 11269ca92389STheodore Ts'o }; 11279ca92389STheodore Ts'o 112839655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11291b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11301b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1131617ba13bSMingming Cao .get_parent = ext4_get_parent, 1132ac27a0ecSDave Kleikamp }; 1133ac27a0ecSDave Kleikamp 1134ac27a0ecSDave Kleikamp enum { 1135ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1136ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 113701436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1138ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 113906705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 114030773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1141c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1142818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1143ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1144296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1145ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11465a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 11475a20bdfcSJan Kara Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, 11485a20bdfcSJan Kara Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, 114901436ef2STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, 11506fd058f7STheodore Ts'o Opt_block_validity, Opt_noblock_validity, 11515328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1152744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 11535328e635SEric Sandeen Opt_discard, Opt_nodiscard, 1154ac27a0ecSDave Kleikamp }; 1155ac27a0ecSDave Kleikamp 1156a447c093SSteven Whitehouse static const match_table_t tokens = { 1157ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1158ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1159ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1160ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1161ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1162ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1163ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1164ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1165ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1166ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1167ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1168ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1169ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1170ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1171ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1172ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1173ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1174ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1175ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1176ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1177ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1178e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 1179ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1180ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1181ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 118230773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 118330773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1184ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1185ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1186818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1187818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1188ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1189ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1190ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1191ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 11925bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 11935bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1194ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1195ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1196ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1197ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1198ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1199ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12005a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1201ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1202ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1203ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1204ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1205ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 120606705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 120706705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 120825ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1209c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1210ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 121164769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1212dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 12136fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12146fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1215240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1216b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1217afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 121806705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 121906705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1220744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1221744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12225328e635SEric Sandeen {Opt_discard, "discard"}, 12235328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1224f3f12faaSJosef Bacik {Opt_err, NULL}, 1225ac27a0ecSDave Kleikamp }; 1226ac27a0ecSDave Kleikamp 1227617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1228ac27a0ecSDave Kleikamp { 1229617ba13bSMingming Cao ext4_fsblk_t sb_block; 1230ac27a0ecSDave Kleikamp char *options = (char *) *data; 1231ac27a0ecSDave Kleikamp 1232ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1233ac27a0ecSDave Kleikamp return 1; /* Default location */ 12340b8e58a1SAndreas Dilger 1235ac27a0ecSDave Kleikamp options += 3; 12360b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1237ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1238ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12394776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1240ac27a0ecSDave Kleikamp (char *) *data); 1241ac27a0ecSDave Kleikamp return 1; 1242ac27a0ecSDave Kleikamp } 1243ac27a0ecSDave Kleikamp if (*options == ',') 1244ac27a0ecSDave Kleikamp options++; 1245ac27a0ecSDave Kleikamp *data = (void *) options; 12460b8e58a1SAndreas Dilger 1247ac27a0ecSDave Kleikamp return sb_block; 1248ac27a0ecSDave Kleikamp } 1249ac27a0ecSDave Kleikamp 1250b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1251437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1252437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1253b3881f74STheodore Ts'o 125456c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 125556c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 125656c50f11SDmitry Monakhov { 125756c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 125856c50f11SDmitry Monakhov char *qname; 125956c50f11SDmitry Monakhov 126056c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 126156c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 126256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 126356c50f11SDmitry Monakhov "Cannot change journaled " 126456c50f11SDmitry Monakhov "quota options when quota turned on"); 126556c50f11SDmitry Monakhov return 0; 126656c50f11SDmitry Monakhov } 126756c50f11SDmitry Monakhov qname = match_strdup(args); 126856c50f11SDmitry Monakhov if (!qname) { 126956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 127056c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 127156c50f11SDmitry Monakhov return 0; 127256c50f11SDmitry Monakhov } 127356c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 127456c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 127556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 127656c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 127756c50f11SDmitry Monakhov kfree(qname); 127856c50f11SDmitry Monakhov return 0; 127956c50f11SDmitry Monakhov } 128056c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 128156c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 128256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 128356c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 128456c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 128556c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 128656c50f11SDmitry Monakhov return 0; 128756c50f11SDmitry Monakhov } 128856c50f11SDmitry Monakhov set_opt(sbi->s_mount_opt, QUOTA); 128956c50f11SDmitry Monakhov return 1; 129056c50f11SDmitry Monakhov } 129156c50f11SDmitry Monakhov 129256c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 129356c50f11SDmitry Monakhov { 129456c50f11SDmitry Monakhov 129556c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 129656c50f11SDmitry Monakhov 129756c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 129856c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 129956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 130056c50f11SDmitry Monakhov " when quota turned on"); 130156c50f11SDmitry Monakhov return 0; 130256c50f11SDmitry Monakhov } 130356c50f11SDmitry Monakhov /* 130456c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 130556c50f11SDmitry Monakhov * to be correct 130656c50f11SDmitry Monakhov */ 130756c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 130856c50f11SDmitry Monakhov return 1; 130956c50f11SDmitry Monakhov } 131056c50f11SDmitry Monakhov #endif 131156c50f11SDmitry Monakhov 1312ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1313c3191067STheodore Ts'o unsigned long *journal_devnum, 1314b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1315617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1316ac27a0ecSDave Kleikamp { 1317617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1318ac27a0ecSDave Kleikamp char *p; 1319ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1320ac27a0ecSDave Kleikamp int data_opt = 0; 1321ac27a0ecSDave Kleikamp int option; 1322ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 132356c50f11SDmitry Monakhov int qfmt; 1324ac27a0ecSDave Kleikamp #endif 1325ac27a0ecSDave Kleikamp 1326ac27a0ecSDave Kleikamp if (!options) 1327ac27a0ecSDave Kleikamp return 1; 1328ac27a0ecSDave Kleikamp 1329ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1330ac27a0ecSDave Kleikamp int token; 1331ac27a0ecSDave Kleikamp if (!*p) 1332ac27a0ecSDave Kleikamp continue; 1333ac27a0ecSDave Kleikamp 133415121c18SEric Sandeen /* 133515121c18SEric Sandeen * Initialize args struct so we know whether arg was 133615121c18SEric Sandeen * found; some options take optional arguments. 133715121c18SEric Sandeen */ 133815121c18SEric Sandeen args[0].to = args[0].from = 0; 1339ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1340ac27a0ecSDave Kleikamp switch (token) { 1341ac27a0ecSDave Kleikamp case Opt_bsd_df: 1342437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1343ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, MINIX_DF); 1344ac27a0ecSDave Kleikamp break; 1345ac27a0ecSDave Kleikamp case Opt_minix_df: 1346437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1347ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, MINIX_DF); 1348437ca0fdSDmitry Monakhov 1349ac27a0ecSDave Kleikamp break; 1350ac27a0ecSDave Kleikamp case Opt_grpid: 1351437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1352ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1353437ca0fdSDmitry Monakhov 1354ac27a0ecSDave Kleikamp break; 1355ac27a0ecSDave Kleikamp case Opt_nogrpid: 1356437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1357ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPID); 1358437ca0fdSDmitry Monakhov 1359ac27a0ecSDave Kleikamp break; 1360ac27a0ecSDave Kleikamp case Opt_resuid: 1361ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1362ac27a0ecSDave Kleikamp return 0; 1363ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1364ac27a0ecSDave Kleikamp break; 1365ac27a0ecSDave Kleikamp case Opt_resgid: 1366ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1367ac27a0ecSDave Kleikamp return 0; 1368ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1369ac27a0ecSDave Kleikamp break; 1370ac27a0ecSDave Kleikamp case Opt_sb: 1371ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1372ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1373ac27a0ecSDave Kleikamp break; 1374ac27a0ecSDave Kleikamp case Opt_err_panic: 1375ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1376ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1377ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1378ac27a0ecSDave Kleikamp break; 1379ac27a0ecSDave Kleikamp case Opt_err_ro: 1380ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1381ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1382ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1383ac27a0ecSDave Kleikamp break; 1384ac27a0ecSDave Kleikamp case Opt_err_cont: 1385ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1386ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1387ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_CONT); 1388ac27a0ecSDave Kleikamp break; 1389ac27a0ecSDave Kleikamp case Opt_nouid32: 1390ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 1391ac27a0ecSDave Kleikamp break; 1392ac27a0ecSDave Kleikamp case Opt_debug: 1393ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1394ac27a0ecSDave Kleikamp break; 1395ac27a0ecSDave Kleikamp case Opt_oldalloc: 1396ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, OLDALLOC); 1397ac27a0ecSDave Kleikamp break; 1398ac27a0ecSDave Kleikamp case Opt_orlov: 1399ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, OLDALLOC); 1400ac27a0ecSDave Kleikamp break; 140103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1402ac27a0ecSDave Kleikamp case Opt_user_xattr: 1403ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 1404ac27a0ecSDave Kleikamp break; 1405ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1406ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, XATTR_USER); 1407ac27a0ecSDave Kleikamp break; 1408ac27a0ecSDave Kleikamp #else 1409ac27a0ecSDave Kleikamp case Opt_user_xattr: 1410ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1411b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1412ac27a0ecSDave Kleikamp break; 1413ac27a0ecSDave Kleikamp #endif 141403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1415ac27a0ecSDave Kleikamp case Opt_acl: 1416ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1417ac27a0ecSDave Kleikamp break; 1418ac27a0ecSDave Kleikamp case Opt_noacl: 1419ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1420ac27a0ecSDave Kleikamp break; 1421ac27a0ecSDave Kleikamp #else 1422ac27a0ecSDave Kleikamp case Opt_acl: 1423ac27a0ecSDave Kleikamp case Opt_noacl: 1424b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1425ac27a0ecSDave Kleikamp break; 1426ac27a0ecSDave Kleikamp #endif 1427ac27a0ecSDave Kleikamp case Opt_journal_update: 1428ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1429ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1430ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1431ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1432ac27a0ecSDave Kleikamp journal file. */ 1433ac27a0ecSDave Kleikamp if (is_remount) { 1434b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1435b31e1552SEric Sandeen "Cannot specify journal on remount"); 1436ac27a0ecSDave Kleikamp return 0; 1437ac27a0ecSDave Kleikamp } 1438ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); 1439ac27a0ecSDave Kleikamp break; 1440ac27a0ecSDave Kleikamp case Opt_journal_dev: 1441ac27a0ecSDave Kleikamp if (is_remount) { 1442b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1443b31e1552SEric Sandeen "Cannot specify journal on remount"); 1444ac27a0ecSDave Kleikamp return 0; 1445ac27a0ecSDave Kleikamp } 1446ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1447ac27a0ecSDave Kleikamp return 0; 1448ac27a0ecSDave Kleikamp *journal_devnum = option; 1449ac27a0ecSDave Kleikamp break; 1450818d276cSGirish Shilamkar case Opt_journal_checksum: 1451d4da6c9cSLinus Torvalds set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1452d4da6c9cSLinus Torvalds break; 1453818d276cSGirish Shilamkar case Opt_journal_async_commit: 1454818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1455d4da6c9cSLinus Torvalds set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1456818d276cSGirish Shilamkar break; 1457ac27a0ecSDave Kleikamp case Opt_noload: 1458ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOLOAD); 1459ac27a0ecSDave Kleikamp break; 1460ac27a0ecSDave Kleikamp case Opt_commit: 1461ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1462ac27a0ecSDave Kleikamp return 0; 1463ac27a0ecSDave Kleikamp if (option < 0) 1464ac27a0ecSDave Kleikamp return 0; 1465ac27a0ecSDave Kleikamp if (option == 0) 1466cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1467ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1468ac27a0ecSDave Kleikamp break; 146930773840STheodore Ts'o case Opt_max_batch_time: 147030773840STheodore Ts'o if (match_int(&args[0], &option)) 147130773840STheodore Ts'o return 0; 147230773840STheodore Ts'o if (option < 0) 147330773840STheodore Ts'o return 0; 147430773840STheodore Ts'o if (option == 0) 147530773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 147630773840STheodore Ts'o sbi->s_max_batch_time = option; 147730773840STheodore Ts'o break; 147830773840STheodore Ts'o case Opt_min_batch_time: 147930773840STheodore Ts'o if (match_int(&args[0], &option)) 148030773840STheodore Ts'o return 0; 148130773840STheodore Ts'o if (option < 0) 148230773840STheodore Ts'o return 0; 148330773840STheodore Ts'o sbi->s_min_batch_time = option; 148430773840STheodore Ts'o break; 1485ac27a0ecSDave Kleikamp case Opt_data_journal: 1486617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1487ac27a0ecSDave Kleikamp goto datacheck; 1488ac27a0ecSDave Kleikamp case Opt_data_ordered: 1489617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1490ac27a0ecSDave Kleikamp goto datacheck; 1491ac27a0ecSDave Kleikamp case Opt_data_writeback: 1492617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1493ac27a0ecSDave Kleikamp datacheck: 1494ac27a0ecSDave Kleikamp if (is_remount) { 1495482a7425SDmitry Monakhov if (test_opt(sb, DATA_FLAGS) != data_opt) { 1496b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1497b31e1552SEric Sandeen "Cannot change data mode on remount"); 1498ac27a0ecSDave Kleikamp return 0; 1499ac27a0ecSDave Kleikamp } 1500ac27a0ecSDave Kleikamp } else { 1501482a7425SDmitry Monakhov clear_opt(sbi->s_mount_opt, DATA_FLAGS); 1502ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1503ac27a0ecSDave Kleikamp } 1504ac27a0ecSDave Kleikamp break; 15055bf5683aSHidehiro Kawai case Opt_data_err_abort: 15065bf5683aSHidehiro Kawai set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 15075bf5683aSHidehiro Kawai break; 15085bf5683aSHidehiro Kawai case Opt_data_err_ignore: 15095bf5683aSHidehiro Kawai clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 15105bf5683aSHidehiro Kawai break; 1511ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1512ac27a0ecSDave Kleikamp case Opt_usrjquota: 151356c50f11SDmitry Monakhov if (!set_qf_name(sb, USRQUOTA, &args[0])) 151456c50f11SDmitry Monakhov return 0; 151556c50f11SDmitry Monakhov break; 1516ac27a0ecSDave Kleikamp case Opt_grpjquota: 151756c50f11SDmitry Monakhov if (!set_qf_name(sb, GRPQUOTA, &args[0])) 1518ac27a0ecSDave Kleikamp return 0; 1519ac27a0ecSDave Kleikamp break; 1520ac27a0ecSDave Kleikamp case Opt_offusrjquota: 152156c50f11SDmitry Monakhov if (!clear_qf_name(sb, USRQUOTA)) 1522ac27a0ecSDave Kleikamp return 0; 1523ac27a0ecSDave Kleikamp break; 152456c50f11SDmitry Monakhov case Opt_offgrpjquota: 152556c50f11SDmitry Monakhov if (!clear_qf_name(sb, GRPQUOTA)) 152656c50f11SDmitry Monakhov return 0; 152756c50f11SDmitry Monakhov break; 152856c50f11SDmitry Monakhov 1529ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1530dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1531dfc5d03fSJan Kara goto set_qf_format; 1532ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1533dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 15345a20bdfcSJan Kara goto set_qf_format; 15355a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 15365a20bdfcSJan Kara qfmt = QFMT_VFS_V1; 1537dfc5d03fSJan Kara set_qf_format: 153817bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1539dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1540b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1541dfc5d03fSJan Kara "journaled quota options when " 1542b31e1552SEric Sandeen "quota turned on"); 1543dfc5d03fSJan Kara return 0; 1544dfc5d03fSJan Kara } 1545dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1546ac27a0ecSDave Kleikamp break; 1547ac27a0ecSDave Kleikamp case Opt_quota: 1548ac27a0ecSDave Kleikamp case Opt_usrquota: 1549ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1550ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1551ac27a0ecSDave Kleikamp break; 1552ac27a0ecSDave Kleikamp case Opt_grpquota: 1553ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1554ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1555ac27a0ecSDave Kleikamp break; 1556ac27a0ecSDave Kleikamp case Opt_noquota: 155717bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1558b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1559b31e1552SEric Sandeen "options when quota turned on"); 1560ac27a0ecSDave Kleikamp return 0; 1561ac27a0ecSDave Kleikamp } 1562ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1563ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1564ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1565ac27a0ecSDave Kleikamp break; 1566ac27a0ecSDave Kleikamp #else 1567ac27a0ecSDave Kleikamp case Opt_quota: 1568ac27a0ecSDave Kleikamp case Opt_usrquota: 1569ac27a0ecSDave Kleikamp case Opt_grpquota: 1570b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1571b31e1552SEric Sandeen "quota options not supported"); 1572cd59e7b9SJan Kara break; 1573ac27a0ecSDave Kleikamp case Opt_usrjquota: 1574ac27a0ecSDave Kleikamp case Opt_grpjquota: 1575ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1576ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1577ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1578ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 15795a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 1580b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1581b31e1552SEric Sandeen "journaled quota options not supported"); 1582ac27a0ecSDave Kleikamp break; 1583ac27a0ecSDave Kleikamp case Opt_noquota: 1584ac27a0ecSDave Kleikamp break; 1585ac27a0ecSDave Kleikamp #endif 1586ac27a0ecSDave Kleikamp case Opt_abort: 15874ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1588ac27a0ecSDave Kleikamp break; 158906705bffSTheodore Ts'o case Opt_nobarrier: 159006705bffSTheodore Ts'o clear_opt(sbi->s_mount_opt, BARRIER); 159106705bffSTheodore Ts'o break; 1592ac27a0ecSDave Kleikamp case Opt_barrier: 159315121c18SEric Sandeen if (args[0].from) { 159415121c18SEric Sandeen if (match_int(&args[0], &option)) 159515121c18SEric Sandeen return 0; 159615121c18SEric Sandeen } else 159715121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1598ac27a0ecSDave Kleikamp if (option) 1599ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1600ac27a0ecSDave Kleikamp else 1601ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1602ac27a0ecSDave Kleikamp break; 1603ac27a0ecSDave Kleikamp case Opt_ignore: 1604ac27a0ecSDave Kleikamp break; 1605ac27a0ecSDave Kleikamp case Opt_resize: 1606ac27a0ecSDave Kleikamp if (!is_remount) { 1607b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1608b31e1552SEric Sandeen "resize option only available " 1609b31e1552SEric Sandeen "for remount"); 1610ac27a0ecSDave Kleikamp return 0; 1611ac27a0ecSDave Kleikamp } 1612ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1613ac27a0ecSDave Kleikamp return 0; 1614ac27a0ecSDave Kleikamp *n_blocks_count = option; 1615ac27a0ecSDave Kleikamp break; 1616ac27a0ecSDave Kleikamp case Opt_nobh: 1617ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1618ac27a0ecSDave Kleikamp break; 1619ac27a0ecSDave Kleikamp case Opt_bh: 1620ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1621ac27a0ecSDave Kleikamp break; 162225ec56b5SJean Noel Cordenner case Opt_i_version: 162325ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 162425ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 162525ec56b5SJean Noel Cordenner break; 1626dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1627dd919b98SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 1628dd919b98SAneesh Kumar K.V break; 1629c9de560dSAlex Tomas case Opt_stripe: 1630c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1631c9de560dSAlex Tomas return 0; 1632c9de560dSAlex Tomas if (option < 0) 1633c9de560dSAlex Tomas return 0; 1634c9de560dSAlex Tomas sbi->s_stripe = option; 1635c9de560dSAlex Tomas break; 163664769240SAlex Tomas case Opt_delalloc: 163764769240SAlex Tomas set_opt(sbi->s_mount_opt, DELALLOC); 163864769240SAlex Tomas break; 16396fd058f7STheodore Ts'o case Opt_block_validity: 16406fd058f7STheodore Ts'o set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 16416fd058f7STheodore Ts'o break; 16426fd058f7STheodore Ts'o case Opt_noblock_validity: 16436fd058f7STheodore Ts'o clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 16446fd058f7STheodore Ts'o break; 1645240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1646240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1647240799cdSTheodore Ts'o return 0; 1648240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1649240799cdSTheodore Ts'o return 0; 1650f7c43950STheodore Ts'o if (!is_power_of_2(option)) { 1651b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1652b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1653b31e1552SEric Sandeen " must be a power of 2"); 16543197ebdbSTheodore Ts'o return 0; 16553197ebdbSTheodore Ts'o } 1656240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1657240799cdSTheodore Ts'o break; 1658b3881f74STheodore Ts'o case Opt_journal_ioprio: 1659b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1660b3881f74STheodore Ts'o return 0; 1661b3881f74STheodore Ts'o if (option < 0 || option > 7) 1662b3881f74STheodore Ts'o break; 1663b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1664b3881f74STheodore Ts'o option); 1665b3881f74STheodore Ts'o break; 166606705bffSTheodore Ts'o case Opt_noauto_da_alloc: 166706705bffSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 166806705bffSTheodore Ts'o break; 1669afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 167015121c18SEric Sandeen if (args[0].from) { 167115121c18SEric Sandeen if (match_int(&args[0], &option)) 167215121c18SEric Sandeen return 0; 167315121c18SEric Sandeen } else 167415121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1675afd4672dSTheodore Ts'o if (option) 1676afd4672dSTheodore Ts'o clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); 1677afd4672dSTheodore Ts'o else 1678afd4672dSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 1679afd4672dSTheodore Ts'o break; 16805328e635SEric Sandeen case Opt_discard: 16815328e635SEric Sandeen set_opt(sbi->s_mount_opt, DISCARD); 16825328e635SEric Sandeen break; 16835328e635SEric Sandeen case Opt_nodiscard: 16845328e635SEric Sandeen clear_opt(sbi->s_mount_opt, DISCARD); 16855328e635SEric Sandeen break; 1686744692dcSJiaying Zhang case Opt_dioread_nolock: 1687744692dcSJiaying Zhang set_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 1688744692dcSJiaying Zhang break; 1689744692dcSJiaying Zhang case Opt_dioread_lock: 1690744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 1691744692dcSJiaying Zhang break; 1692ac27a0ecSDave Kleikamp default: 1693b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1694b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1695b31e1552SEric Sandeen "or missing value", p); 1696ac27a0ecSDave Kleikamp return 0; 1697ac27a0ecSDave Kleikamp } 1698ac27a0ecSDave Kleikamp } 1699ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1700ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1701482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1702ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1703ac27a0ecSDave Kleikamp 1704482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1705ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1706ac27a0ecSDave Kleikamp 170756c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1708b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1709b31e1552SEric Sandeen "format mixing"); 1710ac27a0ecSDave Kleikamp return 0; 1711ac27a0ecSDave Kleikamp } 1712ac27a0ecSDave Kleikamp 1713ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1714b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1715b31e1552SEric Sandeen "not specified"); 1716ac27a0ecSDave Kleikamp return 0; 1717ac27a0ecSDave Kleikamp } 1718ac27a0ecSDave Kleikamp } else { 1719ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1720b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 17212c8be6b2SJan Kara "specified with no journaling " 1722b31e1552SEric Sandeen "enabled"); 1723ac27a0ecSDave Kleikamp return 0; 1724ac27a0ecSDave Kleikamp } 1725ac27a0ecSDave Kleikamp } 1726ac27a0ecSDave Kleikamp #endif 1727ac27a0ecSDave Kleikamp return 1; 1728ac27a0ecSDave Kleikamp } 1729ac27a0ecSDave Kleikamp 1730617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1731ac27a0ecSDave Kleikamp int read_only) 1732ac27a0ecSDave Kleikamp { 1733617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1734ac27a0ecSDave Kleikamp int res = 0; 1735ac27a0ecSDave Kleikamp 1736617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1737b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1738b31e1552SEric Sandeen "forcing read-only mode"); 1739ac27a0ecSDave Kleikamp res = MS_RDONLY; 1740ac27a0ecSDave Kleikamp } 1741ac27a0ecSDave Kleikamp if (read_only) 1742ac27a0ecSDave Kleikamp return res; 1743617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1744b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1745b31e1552SEric Sandeen "running e2fsck is recommended"); 1746617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1747b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1748b31e1552SEric Sandeen "warning: mounting fs with errors, " 1749b31e1552SEric Sandeen "running e2fsck is recommended"); 1750ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1751ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1752ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1753b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1754b31e1552SEric Sandeen "warning: maximal mount count reached, " 1755b31e1552SEric Sandeen "running e2fsck is recommended"); 1756ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1757ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1758ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1759b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1760b31e1552SEric Sandeen "warning: checktime reached, " 1761b31e1552SEric Sandeen "running e2fsck is recommended"); 17620390131bSFrank Mayhar if (!sbi->s_journal) 1763216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1764ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1765617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1766e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1767ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1768617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 17690390131bSFrank Mayhar if (sbi->s_journal) 1770617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1771ac27a0ecSDave Kleikamp 1772e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1773ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1774a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 17757f4520ccSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x]\n", 1776ac27a0ecSDave Kleikamp sb->s_blocksize, 1777ac27a0ecSDave Kleikamp sbi->s_groups_count, 1778617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1779617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1780ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1781ac27a0ecSDave Kleikamp 1782ac27a0ecSDave Kleikamp return res; 1783ac27a0ecSDave Kleikamp } 1784ac27a0ecSDave Kleikamp 1785772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1786772cb7c8SJose R. Santos { 1787772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1788772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1789772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1790772cb7c8SJose R. Santos ext4_group_t flex_group; 1791772cb7c8SJose R. Santos int groups_per_flex = 0; 1792c5ca7c76STheodore Ts'o size_t size; 1793772cb7c8SJose R. Santos int i; 1794772cb7c8SJose R. Santos 1795503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1796503358aeSTheodore Ts'o groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1797503358aeSTheodore Ts'o 1798503358aeSTheodore Ts'o if (groups_per_flex < 2) { 1799772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1800772cb7c8SJose R. Santos return 1; 1801772cb7c8SJose R. Santos } 1802772cb7c8SJose R. Santos 1803c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1804c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1805d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1806d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1807c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 1808c5ca7c76STheodore Ts'o sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); 1809c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 1810c5ca7c76STheodore Ts'o sbi->s_flex_groups = vmalloc(size); 1811c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) 1812c5ca7c76STheodore Ts'o memset(sbi->s_flex_groups, 0, size); 1813c5ca7c76STheodore Ts'o } 1814772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1815b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory for " 1816b31e1552SEric Sandeen "%u flex groups", flex_group_count); 1817772cb7c8SJose R. Santos goto failed; 1818772cb7c8SJose R. Santos } 1819772cb7c8SJose R. Santos 1820772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 182188b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1822772cb7c8SJose R. Santos 1823772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 18247ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 18257ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 18267ad9bb65STheodore Ts'o atomic_add(ext4_free_blks_count(sb, gdp), 18277ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_blocks); 18287ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 18297ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1830772cb7c8SJose R. Santos } 1831772cb7c8SJose R. Santos 1832772cb7c8SJose R. Santos return 1; 1833772cb7c8SJose R. Santos failed: 1834772cb7c8SJose R. Santos return 0; 1835772cb7c8SJose R. Santos } 1836772cb7c8SJose R. Santos 1837717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1838717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1839717d50e4SAndreas Dilger { 1840717d50e4SAndreas Dilger __u16 crc = 0; 1841717d50e4SAndreas Dilger 1842717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1843717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1844717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1845717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1846717d50e4SAndreas Dilger 1847717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1848717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1849717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1850717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1851717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1852717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1853717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1854717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1855717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1856717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1857717d50e4SAndreas Dilger offset); 1858717d50e4SAndreas Dilger } 1859717d50e4SAndreas Dilger 1860717d50e4SAndreas Dilger return cpu_to_le16(crc); 1861717d50e4SAndreas Dilger } 1862717d50e4SAndreas Dilger 1863717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1864717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1865717d50e4SAndreas Dilger { 1866717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1867717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1868717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1869717d50e4SAndreas Dilger return 0; 1870717d50e4SAndreas Dilger 1871717d50e4SAndreas Dilger return 1; 1872717d50e4SAndreas Dilger } 1873717d50e4SAndreas Dilger 1874ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1875617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1876ac27a0ecSDave Kleikamp { 1877617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1878617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1879617ba13bSMingming Cao ext4_fsblk_t last_block; 1880bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1881bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1882bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1883ce421581SJose R. Santos int flexbg_flag = 0; 1884fd2d4291SAvantika Mathur ext4_group_t i; 1885ac27a0ecSDave Kleikamp 1886ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1887ce421581SJose R. Santos flexbg_flag = 1; 1888ce421581SJose R. Santos 1889617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 1890ac27a0ecSDave Kleikamp 1891197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1892197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1893197cd65aSAkinobu Mita 1894ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1895bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1896ac27a0ecSDave Kleikamp else 1897ac27a0ecSDave Kleikamp last_block = first_block + 1898617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1899ac27a0ecSDave Kleikamp 19008fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 19012b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 1902b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1903a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 1904b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 1905ac27a0ecSDave Kleikamp return 0; 1906ac27a0ecSDave Kleikamp } 19078fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 19082b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 1909b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1910a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 1911b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 1912ac27a0ecSDave Kleikamp return 0; 1913ac27a0ecSDave Kleikamp } 19148fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1915bd81d8eeSLaurent Vivier if (inode_table < first_block || 19162b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 1917b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1918a9df9a49STheodore Ts'o "Inode table for group %u not in group " 1919b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 1920ac27a0ecSDave Kleikamp return 0; 1921ac27a0ecSDave Kleikamp } 1922955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 1923717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1924b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1925b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 1926fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1927fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 19287ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 1929955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1930717d50e4SAndreas Dilger return 0; 1931717d50e4SAndreas Dilger } 19327ee1ec4cSLi Zefan } 1933955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1934ce421581SJose R. Santos if (!flexbg_flag) 1935617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 1936ac27a0ecSDave Kleikamp } 1937ac27a0ecSDave Kleikamp 1938bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1939617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 1940ac27a0ecSDave Kleikamp return 1; 1941ac27a0ecSDave Kleikamp } 1942ac27a0ecSDave Kleikamp 1943617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1944ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1945ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1946ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1947ac27a0ecSDave Kleikamp * 1948ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1949ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1950ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1951ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1952ac27a0ecSDave Kleikamp * 1953ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1954ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1955ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1956617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1957ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1958ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1959ac27a0ecSDave Kleikamp */ 1960617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 1961617ba13bSMingming Cao struct ext4_super_block *es) 1962ac27a0ecSDave Kleikamp { 1963ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1964ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1965ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1966ac27a0ecSDave Kleikamp int i; 1967ac27a0ecSDave Kleikamp #endif 1968ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1969ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1970ac27a0ecSDave Kleikamp return; 1971ac27a0ecSDave Kleikamp } 1972ac27a0ecSDave Kleikamp 1973a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1974b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 1975b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 1976a8f48a95SEric Sandeen return; 1977a8f48a95SEric Sandeen } 1978a8f48a95SEric Sandeen 1979617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1980ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1981ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1982ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1983ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1984ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1985ac27a0ecSDave Kleikamp return; 1986ac27a0ecSDave Kleikamp } 1987ac27a0ecSDave Kleikamp 1988ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1989b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 1990ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 1991ac27a0ecSDave Kleikamp } 1992ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1993ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 1994ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 1995ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 1996ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1997617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 1998617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 1999ac27a0ecSDave Kleikamp if (ret < 0) 2000b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2001b31e1552SEric Sandeen "Cannot turn on journaled " 2002b31e1552SEric Sandeen "quota: error %d", ret); 2003ac27a0ecSDave Kleikamp } 2004ac27a0ecSDave Kleikamp } 2005ac27a0ecSDave Kleikamp #endif 2006ac27a0ecSDave Kleikamp 2007ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2008ac27a0ecSDave Kleikamp struct inode *inode; 2009ac27a0ecSDave Kleikamp 201097bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 201197bd42b9SJosef Bacik if (IS_ERR(inode)) { 2012ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2013ac27a0ecSDave Kleikamp break; 2014ac27a0ecSDave Kleikamp } 2015ac27a0ecSDave Kleikamp 2016617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2017a269eb18SJan Kara vfs_dq_init(inode); 2018ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2019b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2020b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 202146e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2022e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2023ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2024617ba13bSMingming Cao ext4_truncate(inode); 2025ac27a0ecSDave Kleikamp nr_truncates++; 2026ac27a0ecSDave Kleikamp } else { 2027b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2028b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 202946e665e9SHarvey Harrison __func__, inode->i_ino); 2030ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2031ac27a0ecSDave Kleikamp inode->i_ino); 2032ac27a0ecSDave Kleikamp nr_orphans++; 2033ac27a0ecSDave Kleikamp } 2034ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2035ac27a0ecSDave Kleikamp } 2036ac27a0ecSDave Kleikamp 2037ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2038ac27a0ecSDave Kleikamp 2039ac27a0ecSDave Kleikamp if (nr_orphans) 2040b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2041b31e1552SEric Sandeen PLURAL(nr_orphans)); 2042ac27a0ecSDave Kleikamp if (nr_truncates) 2043b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2044b31e1552SEric Sandeen PLURAL(nr_truncates)); 2045ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2046ac27a0ecSDave Kleikamp /* Turn quotas off */ 2047ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2048ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 20496f28e087SJan Kara vfs_quota_off(sb, i, 0); 2050ac27a0ecSDave Kleikamp } 2051ac27a0ecSDave Kleikamp #endif 2052ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2053ac27a0ecSDave Kleikamp } 20540b8e58a1SAndreas Dilger 2055cd2291a4SEric Sandeen /* 2056cd2291a4SEric Sandeen * Maximal extent format file size. 2057cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2058cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2059cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2060cd2291a4SEric Sandeen * so that won't be a limiting factor. 2061cd2291a4SEric Sandeen * 2062cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2063cd2291a4SEric Sandeen */ 2064f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2065cd2291a4SEric Sandeen { 2066cd2291a4SEric Sandeen loff_t res; 2067cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2068cd2291a4SEric Sandeen 2069cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2070f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2071cd2291a4SEric Sandeen /* 207290c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2073cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2074cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2075cd2291a4SEric Sandeen */ 2076cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2077cd2291a4SEric Sandeen 2078cd2291a4SEric Sandeen /* total blocks in file system block size */ 2079cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2080cd2291a4SEric Sandeen upper_limit <<= blkbits; 2081cd2291a4SEric Sandeen } 2082cd2291a4SEric Sandeen 2083cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 2084cd2291a4SEric Sandeen res = 1LL << 32; 2085cd2291a4SEric Sandeen res <<= blkbits; 2086cd2291a4SEric Sandeen res -= 1; 2087cd2291a4SEric Sandeen 2088cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2089cd2291a4SEric Sandeen if (res > upper_limit) 2090cd2291a4SEric Sandeen res = upper_limit; 2091cd2291a4SEric Sandeen 2092cd2291a4SEric Sandeen return res; 2093cd2291a4SEric Sandeen } 2094ac27a0ecSDave Kleikamp 2095ac27a0ecSDave Kleikamp /* 2096cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 20970fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 20980fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2099ac27a0ecSDave Kleikamp */ 2100f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2101ac27a0ecSDave Kleikamp { 2102617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 21030fc1b451SAneesh Kumar K.V int meta_blocks; 21040fc1b451SAneesh Kumar K.V loff_t upper_limit; 21050b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 21060b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 21070b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 21080b8e58a1SAndreas Dilger * 21090b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 21100b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 21110fc1b451SAneesh Kumar K.V */ 21120fc1b451SAneesh Kumar K.V 2113f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 21140fc1b451SAneesh Kumar K.V /* 211590c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 21160b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 21170b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 21180fc1b451SAneesh Kumar K.V */ 21190fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 21200fc1b451SAneesh Kumar K.V 21210fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 21220fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 21230fc1b451SAneesh Kumar K.V 21240fc1b451SAneesh Kumar K.V } else { 21258180a562SAneesh Kumar K.V /* 21268180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 21278180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 21288180a562SAneesh Kumar K.V * represent total number of blocks in 21298180a562SAneesh Kumar K.V * file system block size 21308180a562SAneesh Kumar K.V */ 21310fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 21320fc1b451SAneesh Kumar K.V 21330fc1b451SAneesh Kumar K.V } 21340fc1b451SAneesh Kumar K.V 21350fc1b451SAneesh Kumar K.V /* indirect blocks */ 21360fc1b451SAneesh Kumar K.V meta_blocks = 1; 21370fc1b451SAneesh Kumar K.V /* double indirect blocks */ 21380fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 21390fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 21400fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 21410fc1b451SAneesh Kumar K.V 21420fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 21430fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2144ac27a0ecSDave Kleikamp 2145ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2146ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2147ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2148ac27a0ecSDave Kleikamp res <<= bits; 2149ac27a0ecSDave Kleikamp if (res > upper_limit) 2150ac27a0ecSDave Kleikamp res = upper_limit; 21510fc1b451SAneesh Kumar K.V 21520fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 21530fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 21540fc1b451SAneesh Kumar K.V 2155ac27a0ecSDave Kleikamp return res; 2156ac27a0ecSDave Kleikamp } 2157ac27a0ecSDave Kleikamp 2158617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 215970bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2160ac27a0ecSDave Kleikamp { 2161617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2162fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2163ac27a0ecSDave Kleikamp int has_super = 0; 2164ac27a0ecSDave Kleikamp 2165ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2166ac27a0ecSDave Kleikamp 2167617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2168ac27a0ecSDave Kleikamp nr < first_meta_bg) 216970bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2170ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2171617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2172ac27a0ecSDave Kleikamp has_super = 1; 21730b8e58a1SAndreas Dilger 2174617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2175ac27a0ecSDave Kleikamp } 2176ac27a0ecSDave Kleikamp 2177c9de560dSAlex Tomas /** 2178c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2179c9de560dSAlex Tomas * @sbi: In memory super block info 2180c9de560dSAlex Tomas * 2181c9de560dSAlex Tomas * If we have specified it via mount option, then 2182c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2183c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2184c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2185c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2186c9de560dSAlex Tomas * 2187c9de560dSAlex Tomas */ 2188c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2189c9de560dSAlex Tomas { 2190c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2191c9de560dSAlex Tomas unsigned long stripe_width = 2192c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 2193c9de560dSAlex Tomas 2194c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 2195c9de560dSAlex Tomas return sbi->s_stripe; 2196c9de560dSAlex Tomas 2197c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 2198c9de560dSAlex Tomas return stripe_width; 2199c9de560dSAlex Tomas 2200c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 2201c9de560dSAlex Tomas return stride; 2202c9de560dSAlex Tomas 2203c9de560dSAlex Tomas return 0; 2204c9de560dSAlex Tomas } 2205ac27a0ecSDave Kleikamp 22063197ebdbSTheodore Ts'o /* sysfs supprt */ 22073197ebdbSTheodore Ts'o 22083197ebdbSTheodore Ts'o struct ext4_attr { 22093197ebdbSTheodore Ts'o struct attribute attr; 22103197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 22113197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 22123197ebdbSTheodore Ts'o const char *, size_t); 22133197ebdbSTheodore Ts'o int offset; 22143197ebdbSTheodore Ts'o }; 22153197ebdbSTheodore Ts'o 22163197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 22173197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 22183197ebdbSTheodore Ts'o { 22193197ebdbSTheodore Ts'o char *endp; 22203197ebdbSTheodore Ts'o 2221e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2222e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 22233197ebdbSTheodore Ts'o if (*endp || *value > max) 22243197ebdbSTheodore Ts'o return -EINVAL; 22253197ebdbSTheodore Ts'o 22263197ebdbSTheodore Ts'o return 0; 22273197ebdbSTheodore Ts'o } 22283197ebdbSTheodore Ts'o 22293197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 22303197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 22313197ebdbSTheodore Ts'o char *buf) 22323197ebdbSTheodore Ts'o { 22333197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 22343197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 22353197ebdbSTheodore Ts'o } 22363197ebdbSTheodore Ts'o 22373197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 22383197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 22393197ebdbSTheodore Ts'o { 22403197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 22413197ebdbSTheodore Ts'o 22423197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 22433197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 22443197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 22453197ebdbSTheodore Ts'o } 22463197ebdbSTheodore Ts'o 22473197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 22483197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 22493197ebdbSTheodore Ts'o { 22503197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 22513197ebdbSTheodore Ts'o 22523197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2253a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 22543197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2255a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 22563197ebdbSTheodore Ts'o } 22573197ebdbSTheodore Ts'o 22583197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 22593197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 22603197ebdbSTheodore Ts'o const char *buf, size_t count) 22613197ebdbSTheodore Ts'o { 22623197ebdbSTheodore Ts'o unsigned long t; 22633197ebdbSTheodore Ts'o 22643197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 22653197ebdbSTheodore Ts'o return -EINVAL; 22663197ebdbSTheodore Ts'o 2267f7c43950STheodore Ts'o if (!is_power_of_2(t)) 22683197ebdbSTheodore Ts'o return -EINVAL; 22693197ebdbSTheodore Ts'o 22703197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 22713197ebdbSTheodore Ts'o return count; 22723197ebdbSTheodore Ts'o } 22733197ebdbSTheodore Ts'o 22743197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 22753197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 22763197ebdbSTheodore Ts'o { 22773197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 22783197ebdbSTheodore Ts'o 22793197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 22803197ebdbSTheodore Ts'o } 22813197ebdbSTheodore Ts'o 22823197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 22833197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 22843197ebdbSTheodore Ts'o const char *buf, size_t count) 22853197ebdbSTheodore Ts'o { 22863197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 22873197ebdbSTheodore Ts'o unsigned long t; 22883197ebdbSTheodore Ts'o 22893197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 22903197ebdbSTheodore Ts'o return -EINVAL; 22913197ebdbSTheodore Ts'o *ui = t; 22923197ebdbSTheodore Ts'o return count; 22933197ebdbSTheodore Ts'o } 22943197ebdbSTheodore Ts'o 22953197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 22963197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 22973197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 22983197ebdbSTheodore Ts'o .show = _show, \ 22993197ebdbSTheodore Ts'o .store = _store, \ 23003197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 23013197ebdbSTheodore Ts'o } 23023197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 23033197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 23043197ebdbSTheodore Ts'o 23053197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 23063197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 23073197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 23083197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 23093197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 23103197ebdbSTheodore Ts'o 23113197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 23123197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 23133197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 23143197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 23153197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 231611013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 23173197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 23183197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 23193197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 23203197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 23213197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 23223197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 232355138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 23243197ebdbSTheodore Ts'o 23253197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 23263197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 23273197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 23283197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 23293197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 233011013911SAndreas Dilger ATTR_LIST(inode_goal), 23313197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 23323197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 23333197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 23343197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 23353197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 23363197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 233755138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 23383197ebdbSTheodore Ts'o NULL, 23393197ebdbSTheodore Ts'o }; 23403197ebdbSTheodore Ts'o 23413197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 23423197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 23433197ebdbSTheodore Ts'o { 23443197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 23453197ebdbSTheodore Ts'o s_kobj); 23463197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 23473197ebdbSTheodore Ts'o 23483197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 23493197ebdbSTheodore Ts'o } 23503197ebdbSTheodore Ts'o 23513197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 23523197ebdbSTheodore Ts'o struct attribute *attr, 23533197ebdbSTheodore Ts'o const char *buf, size_t len) 23543197ebdbSTheodore Ts'o { 23553197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 23563197ebdbSTheodore Ts'o s_kobj); 23573197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 23583197ebdbSTheodore Ts'o 23593197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 23603197ebdbSTheodore Ts'o } 23613197ebdbSTheodore Ts'o 23623197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 23633197ebdbSTheodore Ts'o { 23643197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 23653197ebdbSTheodore Ts'o s_kobj); 23663197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 23673197ebdbSTheodore Ts'o } 23683197ebdbSTheodore Ts'o 23693197ebdbSTheodore Ts'o 23703197ebdbSTheodore Ts'o static struct sysfs_ops ext4_attr_ops = { 23713197ebdbSTheodore Ts'o .show = ext4_attr_show, 23723197ebdbSTheodore Ts'o .store = ext4_attr_store, 23733197ebdbSTheodore Ts'o }; 23743197ebdbSTheodore Ts'o 23753197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 23763197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 23773197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 23783197ebdbSTheodore Ts'o .release = ext4_sb_release, 23793197ebdbSTheodore Ts'o }; 23803197ebdbSTheodore Ts'o 2381a13fb1a4SEric Sandeen /* 2382a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2383a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2384a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2385a13fb1a4SEric Sandeen * 0 if it cannot be. 2386a13fb1a4SEric Sandeen */ 2387a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2388a13fb1a4SEric Sandeen { 2389a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2390a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2391a13fb1a4SEric Sandeen "Couldn't mount because of " 2392a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2393a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2394a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2395a13fb1a4SEric Sandeen return 0; 2396a13fb1a4SEric Sandeen } 2397a13fb1a4SEric Sandeen 2398a13fb1a4SEric Sandeen if (readonly) 2399a13fb1a4SEric Sandeen return 1; 2400a13fb1a4SEric Sandeen 2401a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2402a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2403a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2404a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2405a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2406a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2407a13fb1a4SEric Sandeen return 0; 2408a13fb1a4SEric Sandeen } 2409a13fb1a4SEric Sandeen /* 2410a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2411a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2412a13fb1a4SEric Sandeen */ 2413a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2414a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2415a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2416a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2417a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2418a13fb1a4SEric Sandeen return 0; 2419a13fb1a4SEric Sandeen } 2420a13fb1a4SEric Sandeen } 2421a13fb1a4SEric Sandeen return 1; 2422a13fb1a4SEric Sandeen } 2423a13fb1a4SEric Sandeen 2424617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 24257477827fSAneesh Kumar K.V __releases(kernel_lock) 24267477827fSAneesh Kumar K.V __acquires(kernel_lock) 2427ac27a0ecSDave Kleikamp { 2428ac27a0ecSDave Kleikamp struct buffer_head *bh; 2429617ba13bSMingming Cao struct ext4_super_block *es = NULL; 2430617ba13bSMingming Cao struct ext4_sb_info *sbi; 2431617ba13bSMingming Cao ext4_fsblk_t block; 2432617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 243370bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 2434ac27a0ecSDave Kleikamp unsigned long offset = 0; 2435ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 2436ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 2437ac27a0ecSDave Kleikamp struct inode *root; 24389f6200bbSTheodore Ts'o char *cp; 24390390131bSFrank Mayhar const char *descr; 24401d1fe1eeSDavid Howells int ret = -EINVAL; 2441ac27a0ecSDave Kleikamp int blocksize; 24424ec11028STheodore Ts'o unsigned int db_count; 24434ec11028STheodore Ts'o unsigned int i; 2444f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 2445bd81d8eeSLaurent Vivier __u64 blocks_count; 2446833f4077SPeter Zijlstra int err; 2447b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 2448ac27a0ecSDave Kleikamp 2449ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 2450ac27a0ecSDave Kleikamp if (!sbi) 2451ac27a0ecSDave Kleikamp return -ENOMEM; 2452705895b6SPekka Enberg 2453705895b6SPekka Enberg sbi->s_blockgroup_lock = 2454705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 2455705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 2456705895b6SPekka Enberg kfree(sbi); 2457705895b6SPekka Enberg return -ENOMEM; 2458705895b6SPekka Enberg } 2459ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 2460ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 2461617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 2462617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 2463240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 2464d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 2465afc32f7eSTheodore Ts'o sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, 2466afc32f7eSTheodore Ts'o sectors[1]); 2467ac27a0ecSDave Kleikamp 2468ac27a0ecSDave Kleikamp unlock_kernel(); 2469ac27a0ecSDave Kleikamp 24709f6200bbSTheodore Ts'o /* Cleanup superblock name */ 24719f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 24729f6200bbSTheodore Ts'o *cp = '!'; 24739f6200bbSTheodore Ts'o 2474617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 2475ac27a0ecSDave Kleikamp if (!blocksize) { 2476b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 2477ac27a0ecSDave Kleikamp goto out_fail; 2478ac27a0ecSDave Kleikamp } 2479ac27a0ecSDave Kleikamp 2480ac27a0ecSDave Kleikamp /* 2481617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 2482ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 2483ac27a0ecSDave Kleikamp */ 2484617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 248570bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 248670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 2487ac27a0ecSDave Kleikamp } else { 248870bbb3e0SAndrew Morton logical_sb_block = sb_block; 2489ac27a0ecSDave Kleikamp } 2490ac27a0ecSDave Kleikamp 249170bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 2492b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 2493ac27a0ecSDave Kleikamp goto out_fail; 2494ac27a0ecSDave Kleikamp } 2495ac27a0ecSDave Kleikamp /* 2496ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 2497617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 2498ac27a0ecSDave Kleikamp */ 2499617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2500ac27a0ecSDave Kleikamp sbi->s_es = es; 2501ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 2502617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 2503617ba13bSMingming Cao goto cantfind_ext4; 2504afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 2505ac27a0ecSDave Kleikamp 2506ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 2507ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 2508617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 2509ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 2510437ca0fdSDmitry Monakhov if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { 2511437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", 2512437ca0fdSDmitry Monakhov "2.6.38"); 2513ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 2514437ca0fdSDmitry Monakhov } 2515617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 2516ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 251703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 2518617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 2519ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 25202e7842b8SHugh Dickins #endif 252103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 2522617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 2523ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 25242e7842b8SHugh Dickins #endif 2525617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 2526482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2527617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 2528482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, ORDERED_DATA); 2529617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 2530482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 2531ac27a0ecSDave Kleikamp 2532617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 2533ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 2534bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 2535ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 2536bb4f397aSAneesh Kumar K.V else 2537bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 2538ac27a0ecSDave Kleikamp 2539ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 2540ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 254130773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 254230773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 254330773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 2544ac27a0ecSDave Kleikamp 2545571640caSEric Sandeen set_opt(sbi->s_mount_opt, BARRIER); 2546ac27a0ecSDave Kleikamp 25471e2462f9SMingming Cao /* 2548dd919b98SAneesh Kumar K.V * enable delayed allocation by default 2549dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 2550dd919b98SAneesh Kumar K.V */ 2551dd919b98SAneesh Kumar K.V set_opt(sbi->s_mount_opt, DELALLOC); 2552dd919b98SAneesh Kumar K.V 2553b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 2554b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 2555ac27a0ecSDave Kleikamp goto failed_mount; 2556ac27a0ecSDave Kleikamp 2557ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2558482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 2559ac27a0ecSDave Kleikamp 2560617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 2561617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 2562617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 2563617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 2564b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2565b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 2566b31e1552SEric Sandeen "running e2fsck is recommended"); 2567469108ffSTheodore Tso 2568469108ffSTheodore Tso /* 2569ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 2570ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 2571ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 2572ac27a0ecSDave Kleikamp */ 2573a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 2574ac27a0ecSDave Kleikamp goto failed_mount; 2575a13fb1a4SEric Sandeen 2576ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 2577ac27a0ecSDave Kleikamp 2578617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 2579617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 2580b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2581b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 2582ac27a0ecSDave Kleikamp goto failed_mount; 2583ac27a0ecSDave Kleikamp } 2584ac27a0ecSDave Kleikamp 2585ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 2586ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 2587ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 2588b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 2589ce40733cSAneesh Kumar K.V blocksize); 2590ac27a0ecSDave Kleikamp goto failed_mount; 2591ac27a0ecSDave Kleikamp } 2592ac27a0ecSDave Kleikamp 2593ac27a0ecSDave Kleikamp brelse(bh); 259470bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 259570bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 259670bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 2597ac27a0ecSDave Kleikamp if (!bh) { 2598b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2599b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 2600ac27a0ecSDave Kleikamp goto failed_mount; 2601ac27a0ecSDave Kleikamp } 2602617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 2603ac27a0ecSDave Kleikamp sbi->s_es = es; 2604617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 2605b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2606b31e1552SEric Sandeen "Magic mismatch, very weird!"); 2607ac27a0ecSDave Kleikamp goto failed_mount; 2608ac27a0ecSDave Kleikamp } 2609ac27a0ecSDave Kleikamp } 2610ac27a0ecSDave Kleikamp 2611a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2612a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 2613f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 2614f287a1a5STheodore Ts'o has_huge_files); 2615f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 2616ac27a0ecSDave Kleikamp 2617617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 2618617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 2619617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 2620ac27a0ecSDave Kleikamp } else { 2621ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2622ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2623617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 26241330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2625ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2626b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2627b31e1552SEric Sandeen "unsupported inode size: %d", 2628ac27a0ecSDave Kleikamp sbi->s_inode_size); 2629ac27a0ecSDave Kleikamp goto failed_mount; 2630ac27a0ecSDave Kleikamp } 2631ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2632ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2633ac27a0ecSDave Kleikamp } 26340b8e58a1SAndreas Dilger 26350d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 26360d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 26378fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 26380d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2639d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 2640b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2641b31e1552SEric Sandeen "unsupported descriptor size %lu", 26420d1ee42fSAlexandre Ratchov sbi->s_desc_size); 26430d1ee42fSAlexandre Ratchov goto failed_mount; 26440d1ee42fSAlexandre Ratchov } 26450d1ee42fSAlexandre Ratchov } else 26460d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 26470b8e58a1SAndreas Dilger 2648ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2649ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2650b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2651617ba13bSMingming Cao goto cantfind_ext4; 26520b8e58a1SAndreas Dilger 2653617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2654ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2655617ba13bSMingming Cao goto cantfind_ext4; 2656ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2657ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 26580d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2659ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2660ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2661e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2662e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 26630b8e58a1SAndreas Dilger 2664ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 2665ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2666ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2667f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 2668f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 2669f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2670f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 2671f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 2672f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 2673f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2674f99b2589STheodore Ts'o #else 2675f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 2676f99b2589STheodore Ts'o #endif 2677f99b2589STheodore Ts'o sb->s_dirt = 1; 2678f99b2589STheodore Ts'o } 2679ac27a0ecSDave Kleikamp 2680ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2681b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2682b31e1552SEric Sandeen "#blocks per group too big: %lu", 2683ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2684ac27a0ecSDave Kleikamp goto failed_mount; 2685ac27a0ecSDave Kleikamp } 2686ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2687b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2688b31e1552SEric Sandeen "#inodes per group too big: %lu", 2689ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2690ac27a0ecSDave Kleikamp goto failed_mount; 2691ac27a0ecSDave Kleikamp } 2692ac27a0ecSDave Kleikamp 2693bf43d84bSEric Sandeen /* 2694bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 2695bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 2696bf43d84bSEric Sandeen */ 2697bf43d84bSEric Sandeen if ((ext4_blocks_count(es) > 2698bf43d84bSEric Sandeen (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) || 2699bf43d84bSEric Sandeen (ext4_blocks_count(es) > 2700bf43d84bSEric Sandeen (pgoff_t)(~0ULL) >> (PAGE_CACHE_SHIFT - sb->s_blocksize_bits))) { 2701b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 2702bf43d84bSEric Sandeen " too large to mount safely on this system"); 2703ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 270490c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 2705bf43d84bSEric Sandeen ret = -EFBIG; 2706ac27a0ecSDave Kleikamp goto failed_mount; 2707ac27a0ecSDave Kleikamp } 2708ac27a0ecSDave Kleikamp 2709617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2710617ba13bSMingming Cao goto cantfind_ext4; 2711e7c95593SEric Sandeen 27120f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 27130f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 27140f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 2715b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 2716b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 27170f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 27180f2ddca6SFrom: Thiemo Nagel goto failed_mount; 27190f2ddca6SFrom: Thiemo Nagel } 27200f2ddca6SFrom: Thiemo Nagel 27214ec11028STheodore Ts'o /* 27224ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 27234ec11028STheodore Ts'o * of the filesystem. 27244ec11028STheodore Ts'o */ 27254ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 2726b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 2727b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 2728e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 27294ec11028STheodore Ts'o ext4_blocks_count(es)); 2730e7c95593SEric Sandeen goto failed_mount; 2731e7c95593SEric Sandeen } 2732bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2733bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2734bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2735bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 27364ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 2737b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 27384ec11028STheodore Ts'o "(block count %llu, first data block %u, " 2739b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 27404ec11028STheodore Ts'o ext4_blocks_count(es), 27414ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 27424ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 27434ec11028STheodore Ts'o goto failed_mount; 27444ec11028STheodore Ts'o } 2745bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2746fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 2747fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 2748617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2749617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2750ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 2751ac27a0ecSDave Kleikamp GFP_KERNEL); 2752ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2753b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 2754ac27a0ecSDave Kleikamp goto failed_mount; 2755ac27a0ecSDave Kleikamp } 2756ac27a0ecSDave Kleikamp 27573244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 27589f6200bbSTheodore Ts'o if (ext4_proc_root) 27599f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 27603244fcb1SAlexander Beregalov #endif 2761240799cdSTheodore Ts'o 2762705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 2763ac27a0ecSDave Kleikamp 2764ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 276570bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2766ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2767ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2768b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2769b31e1552SEric Sandeen "can't read group descriptor %d", i); 2770ac27a0ecSDave Kleikamp db_count = i; 2771ac27a0ecSDave Kleikamp goto failed_mount2; 2772ac27a0ecSDave Kleikamp } 2773ac27a0ecSDave Kleikamp } 2774617ba13bSMingming Cao if (!ext4_check_descriptors(sb)) { 2775b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 2776ac27a0ecSDave Kleikamp goto failed_mount2; 2777ac27a0ecSDave Kleikamp } 2778772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2779772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 2780b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2781b31e1552SEric Sandeen "unable to initialize " 2782b31e1552SEric Sandeen "flex_bg meta info!"); 2783772cb7c8SJose R. Santos goto failed_mount2; 2784772cb7c8SJose R. Santos } 2785772cb7c8SJose R. Santos 2786ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2787ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2788ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2789ac27a0ecSDave Kleikamp 2790833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeblocks_counter, 2791617ba13bSMingming Cao ext4_count_free_blocks(sb)); 2792833f4077SPeter Zijlstra if (!err) { 2793833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeinodes_counter, 2794617ba13bSMingming Cao ext4_count_free_inodes(sb)); 2795833f4077SPeter Zijlstra } 2796833f4077SPeter Zijlstra if (!err) { 2797833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_dirs_counter, 2798617ba13bSMingming Cao ext4_count_dirs(sb)); 2799833f4077SPeter Zijlstra } 28006bc6e63fSAneesh Kumar K.V if (!err) { 28016bc6e63fSAneesh Kumar K.V err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 28026bc6e63fSAneesh Kumar K.V } 2803833f4077SPeter Zijlstra if (err) { 2804b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "insufficient memory"); 2805833f4077SPeter Zijlstra goto failed_mount3; 2806833f4077SPeter Zijlstra } 2807ac27a0ecSDave Kleikamp 2808c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 280955138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 2810c9de560dSAlex Tomas 2811ac27a0ecSDave Kleikamp /* 2812ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2813ac27a0ecSDave Kleikamp */ 28149ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 28159ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 2816617ba13bSMingming Cao sb->s_op = &ext4_sops; 28179ca92389STheodore Ts'o else 28189ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 2819617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2820617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2821ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2822617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2823617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2824ac27a0ecSDave Kleikamp #endif 2825ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 28263b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 282732ed5058STheodore Ts'o mutex_init(&sbi->s_resize_lock); 2828ac27a0ecSDave Kleikamp 2829ac27a0ecSDave Kleikamp sb->s_root = NULL; 2830ac27a0ecSDave Kleikamp 2831ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2832617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2833617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2834ac27a0ecSDave Kleikamp 2835ac27a0ecSDave Kleikamp /* 2836ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2837ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2838ac27a0ecSDave Kleikamp */ 2839ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2840617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2841617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2842ac27a0ecSDave Kleikamp goto failed_mount3; 28430390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 28440390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2845b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 2846b31e1552SEric Sandeen "suppressed and not mounted read-only"); 2847744692dcSJiaying Zhang goto failed_mount_wq; 2848ac27a0ecSDave Kleikamp } else { 28490390131bSFrank Mayhar clear_opt(sbi->s_mount_opt, DATA_FLAGS); 28500390131bSFrank Mayhar set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 28510390131bSFrank Mayhar sbi->s_journal = NULL; 28520390131bSFrank Mayhar needs_recovery = 0; 28530390131bSFrank Mayhar goto no_journal; 2854ac27a0ecSDave Kleikamp } 2855ac27a0ecSDave Kleikamp 2856eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2857eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2858eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2859b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 2860744692dcSJiaying Zhang goto failed_mount_wq; 2861eb40a09cSJose R. Santos } 2862eb40a09cSJose R. Santos 2863d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 2864d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 2865d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2866d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2867d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 2868818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2869818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2870818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2871818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2872d4da6c9cSLinus Torvalds } else { 2873d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 2874d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2875d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2876d4da6c9cSLinus Torvalds } 2877818d276cSGirish Shilamkar 2878ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2879ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2880ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 2881ac27a0ecSDave Kleikamp case 0: 2882ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 288363f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 288463f57933SAndrew Morton * cope, else JOURNAL_DATA 288563f57933SAndrew Morton */ 2886dab291afSMingming Cao if (jbd2_journal_check_available_features 2887dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 2888ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 2889ac27a0ecSDave Kleikamp else 2890ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2891ac27a0ecSDave Kleikamp break; 2892ac27a0ecSDave Kleikamp 2893617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 2894617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 2895dab291afSMingming Cao if (!jbd2_journal_check_available_features 2896dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 2897b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 2898b31e1552SEric Sandeen "requested data journaling mode"); 2899744692dcSJiaying Zhang goto failed_mount_wq; 2900ac27a0ecSDave Kleikamp } 2901ac27a0ecSDave Kleikamp default: 2902ac27a0ecSDave Kleikamp break; 2903ac27a0ecSDave Kleikamp } 2904b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 2905ac27a0ecSDave Kleikamp 29060390131bSFrank Mayhar no_journal: 2907ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 2908617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 2909b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring nobh option - " 2910b31e1552SEric Sandeen "its supported only with writeback mode"); 2911ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 2912ac27a0ecSDave Kleikamp } 2913744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) { 2914744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "dioread_nolock option is " 2915744692dcSJiaying Zhang "not supported with nobh mode"); 2916744692dcSJiaying Zhang goto failed_mount_wq; 2917744692dcSJiaying Zhang } 2918ac27a0ecSDave Kleikamp } 29194c0425ffSMingming Cao EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); 29204c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 29214c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 29224c0425ffSMingming Cao goto failed_mount_wq; 29234c0425ffSMingming Cao } 29244c0425ffSMingming Cao 2925ac27a0ecSDave Kleikamp /* 2926dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 2927ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 2928ac27a0ecSDave Kleikamp */ 2929ac27a0ecSDave Kleikamp 29301d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 29311d1fe1eeSDavid Howells if (IS_ERR(root)) { 2932b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 29331d1fe1eeSDavid Howells ret = PTR_ERR(root); 2934ac27a0ecSDave Kleikamp goto failed_mount4; 2935ac27a0ecSDave Kleikamp } 2936ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 29371d1fe1eeSDavid Howells iput(root); 2938b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 2939ac27a0ecSDave Kleikamp goto failed_mount4; 2940ac27a0ecSDave Kleikamp } 29411d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 29421d1fe1eeSDavid Howells if (!sb->s_root) { 2943b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 29441d1fe1eeSDavid Howells iput(root); 29451d1fe1eeSDavid Howells ret = -ENOMEM; 29461d1fe1eeSDavid Howells goto failed_mount4; 29471d1fe1eeSDavid Howells } 2948ac27a0ecSDave Kleikamp 2949617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 2950ef7f3835SKalpak Shah 2951ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 2952ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 2953ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2954ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2955ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 2956ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 2957ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2958ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 2959ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2960ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 2961ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2962ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 2963ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2964ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 2965ef7f3835SKalpak Shah } 2966ef7f3835SKalpak Shah } 2967ef7f3835SKalpak Shah /* Check if enough inode space is available */ 2968ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 2969ef7f3835SKalpak Shah sbi->s_inode_size) { 2970ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2971ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2972b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 2973b31e1552SEric Sandeen "available"); 2974ef7f3835SKalpak Shah } 2975ef7f3835SKalpak Shah 297690576c0bSTheodore Ts'o if (test_opt(sb, DELALLOC) && 297790576c0bSTheodore Ts'o (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 2978b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " 2979b31e1552SEric Sandeen "requested data journaling mode"); 2980c2774d84SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 298190576c0bSTheodore Ts'o } 2982744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) { 2983744692dcSJiaying Zhang if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 2984744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 2985744692dcSJiaying Zhang "option - requested data journaling mode"); 2986744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 2987744692dcSJiaying Zhang } 2988744692dcSJiaying Zhang if (sb->s_blocksize < PAGE_SIZE) { 2989744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 2990744692dcSJiaying Zhang "option - block size is too small"); 2991744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 2992744692dcSJiaying Zhang } 2993744692dcSJiaying Zhang } 2994c2774d84SAneesh Kumar K.V 29956fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 29966fd058f7STheodore Ts'o if (err) { 2997b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 29986fd058f7STheodore Ts'o "zone (%d)\n", err); 29996fd058f7STheodore Ts'o goto failed_mount4; 30006fd058f7STheodore Ts'o } 30016fd058f7STheodore Ts'o 3002c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 3003c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 3004c2774d84SAneesh Kumar K.V if (err) { 3005b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initalize mballoc (%d)", 3006c2774d84SAneesh Kumar K.V err); 3007c2774d84SAneesh Kumar K.V goto failed_mount4; 3008c2774d84SAneesh Kumar K.V } 3009c2774d84SAneesh Kumar K.V 30103197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 30113197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 30123197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 30133197ebdbSTheodore Ts'o "%s", sb->s_id); 30143197ebdbSTheodore Ts'o if (err) { 30153197ebdbSTheodore Ts'o ext4_mb_release(sb); 30163197ebdbSTheodore Ts'o ext4_ext_release(sb); 30173197ebdbSTheodore Ts'o goto failed_mount4; 30183197ebdbSTheodore Ts'o }; 30193197ebdbSTheodore Ts'o 3020617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3021617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3022617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 30230390131bSFrank Mayhar if (needs_recovery) { 3024b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3025617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 30260390131bSFrank Mayhar } 30270390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 30280390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 30290390131bSFrank Mayhar descr = " journalled data mode"; 30300390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 30310390131bSFrank Mayhar descr = " ordered data mode"; 30320390131bSFrank Mayhar else 30330390131bSFrank Mayhar descr = " writeback data mode"; 30340390131bSFrank Mayhar } else 30350390131bSFrank Mayhar descr = "out journal"; 30360390131bSFrank Mayhar 3037b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "mounted filesystem with%s", descr); 3038ac27a0ecSDave Kleikamp 3039ac27a0ecSDave Kleikamp lock_kernel(); 3040ac27a0ecSDave Kleikamp return 0; 3041ac27a0ecSDave Kleikamp 3042617ba13bSMingming Cao cantfind_ext4: 3043ac27a0ecSDave Kleikamp if (!silent) 3044b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3045ac27a0ecSDave Kleikamp goto failed_mount; 3046ac27a0ecSDave Kleikamp 3047ac27a0ecSDave Kleikamp failed_mount4: 3048b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 30494c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 30504c0425ffSMingming Cao failed_mount_wq: 30516fd058f7STheodore Ts'o ext4_release_system_zone(sb); 30520390131bSFrank Mayhar if (sbi->s_journal) { 3053dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 305447b4a50bSJan Kara sbi->s_journal = NULL; 30550390131bSFrank Mayhar } 3056ac27a0ecSDave Kleikamp failed_mount3: 3057c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) { 3058c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 3059c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 3060c5ca7c76STheodore Ts'o else 3061c5ca7c76STheodore Ts'o kfree(sbi->s_flex_groups); 3062c5ca7c76STheodore Ts'o } 3063ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 3064ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 3065ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 30666bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 3067ac27a0ecSDave Kleikamp failed_mount2: 3068ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 3069ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 3070ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 3071ac27a0ecSDave Kleikamp failed_mount: 3072240799cdSTheodore Ts'o if (sbi->s_proc) { 30739f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 3074240799cdSTheodore Ts'o } 3075ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3076ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3077ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3078ac27a0ecSDave Kleikamp #endif 3079617ba13bSMingming Cao ext4_blkdev_remove(sbi); 3080ac27a0ecSDave Kleikamp brelse(bh); 3081ac27a0ecSDave Kleikamp out_fail: 3082ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 3083f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 3084ac27a0ecSDave Kleikamp kfree(sbi); 3085ac27a0ecSDave Kleikamp lock_kernel(); 30861d1fe1eeSDavid Howells return ret; 3087ac27a0ecSDave Kleikamp } 3088ac27a0ecSDave Kleikamp 3089ac27a0ecSDave Kleikamp /* 3090ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 3091ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 3092ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 3093ac27a0ecSDave Kleikamp */ 3094617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3095ac27a0ecSDave Kleikamp { 3096617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3097ac27a0ecSDave Kleikamp 3098ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 309930773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 310030773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3101ac27a0ecSDave Kleikamp 3102ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 3103ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3104dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3105ac27a0ecSDave Kleikamp else 3106dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 31075bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 31085bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 31095bf5683aSHidehiro Kawai else 31105bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3111ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 3112ac27a0ecSDave Kleikamp } 3113ac27a0ecSDave Kleikamp 3114617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3115ac27a0ecSDave Kleikamp unsigned int journal_inum) 3116ac27a0ecSDave Kleikamp { 3117ac27a0ecSDave Kleikamp struct inode *journal_inode; 3118ac27a0ecSDave Kleikamp journal_t *journal; 3119ac27a0ecSDave Kleikamp 31200390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 31210390131bSFrank Mayhar 3122ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3123ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3124ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3125ac27a0ecSDave Kleikamp 31261d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 31271d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3128b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3129ac27a0ecSDave Kleikamp return NULL; 3130ac27a0ecSDave Kleikamp } 3131ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3132ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3133ac27a0ecSDave Kleikamp iput(journal_inode); 3134b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3135ac27a0ecSDave Kleikamp return NULL; 3136ac27a0ecSDave Kleikamp } 3137ac27a0ecSDave Kleikamp 3138e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3139ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 31401d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3141b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3142ac27a0ecSDave Kleikamp iput(journal_inode); 3143ac27a0ecSDave Kleikamp return NULL; 3144ac27a0ecSDave Kleikamp } 3145ac27a0ecSDave Kleikamp 3146dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3147ac27a0ecSDave Kleikamp if (!journal) { 3148b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3149ac27a0ecSDave Kleikamp iput(journal_inode); 3150ac27a0ecSDave Kleikamp return NULL; 3151ac27a0ecSDave Kleikamp } 3152ac27a0ecSDave Kleikamp journal->j_private = sb; 3153617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3154ac27a0ecSDave Kleikamp return journal; 3155ac27a0ecSDave Kleikamp } 3156ac27a0ecSDave Kleikamp 3157617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3158ac27a0ecSDave Kleikamp dev_t j_dev) 3159ac27a0ecSDave Kleikamp { 3160ac27a0ecSDave Kleikamp struct buffer_head *bh; 3161ac27a0ecSDave Kleikamp journal_t *journal; 3162617ba13bSMingming Cao ext4_fsblk_t start; 3163617ba13bSMingming Cao ext4_fsblk_t len; 3164ac27a0ecSDave Kleikamp int hblock, blocksize; 3165617ba13bSMingming Cao ext4_fsblk_t sb_block; 3166ac27a0ecSDave Kleikamp unsigned long offset; 3167617ba13bSMingming Cao struct ext4_super_block *es; 3168ac27a0ecSDave Kleikamp struct block_device *bdev; 3169ac27a0ecSDave Kleikamp 31700390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 31710390131bSFrank Mayhar 3172b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3173ac27a0ecSDave Kleikamp if (bdev == NULL) 3174ac27a0ecSDave Kleikamp return NULL; 3175ac27a0ecSDave Kleikamp 3176ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 3177b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3178b31e1552SEric Sandeen "failed to claim external journal device"); 31799a1c3542SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 3180ac27a0ecSDave Kleikamp return NULL; 3181ac27a0ecSDave Kleikamp } 3182ac27a0ecSDave Kleikamp 3183ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3184e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3185ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3186b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3187b31e1552SEric Sandeen "blocksize too small for journal device"); 3188ac27a0ecSDave Kleikamp goto out_bdev; 3189ac27a0ecSDave Kleikamp } 3190ac27a0ecSDave Kleikamp 3191617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3192617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3193ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3194ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3195b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3196b31e1552SEric Sandeen "external journal"); 3197ac27a0ecSDave Kleikamp goto out_bdev; 3198ac27a0ecSDave Kleikamp } 3199ac27a0ecSDave Kleikamp 3200617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3201617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3202ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3203617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3204b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3205b31e1552SEric Sandeen "bad superblock"); 3206ac27a0ecSDave Kleikamp brelse(bh); 3207ac27a0ecSDave Kleikamp goto out_bdev; 3208ac27a0ecSDave Kleikamp } 3209ac27a0ecSDave Kleikamp 3210617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3211b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3212ac27a0ecSDave Kleikamp brelse(bh); 3213ac27a0ecSDave Kleikamp goto out_bdev; 3214ac27a0ecSDave Kleikamp } 3215ac27a0ecSDave Kleikamp 3216bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3217ac27a0ecSDave Kleikamp start = sb_block + 1; 3218ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3219ac27a0ecSDave Kleikamp 3220dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3221ac27a0ecSDave Kleikamp start, len, blocksize); 3222ac27a0ecSDave Kleikamp if (!journal) { 3223b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3224ac27a0ecSDave Kleikamp goto out_bdev; 3225ac27a0ecSDave Kleikamp } 3226ac27a0ecSDave Kleikamp journal->j_private = sb; 3227ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3228ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3229ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3230b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3231ac27a0ecSDave Kleikamp goto out_journal; 3232ac27a0ecSDave Kleikamp } 3233ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3234b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3235b31e1552SEric Sandeen "user (unsupported) - %d", 3236ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3237ac27a0ecSDave Kleikamp goto out_journal; 3238ac27a0ecSDave Kleikamp } 3239617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3240617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3241ac27a0ecSDave Kleikamp return journal; 32420b8e58a1SAndreas Dilger 3243ac27a0ecSDave Kleikamp out_journal: 3244dab291afSMingming Cao jbd2_journal_destroy(journal); 3245ac27a0ecSDave Kleikamp out_bdev: 3246617ba13bSMingming Cao ext4_blkdev_put(bdev); 3247ac27a0ecSDave Kleikamp return NULL; 3248ac27a0ecSDave Kleikamp } 3249ac27a0ecSDave Kleikamp 3250617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3251617ba13bSMingming Cao struct ext4_super_block *es, 3252ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3253ac27a0ecSDave Kleikamp { 3254ac27a0ecSDave Kleikamp journal_t *journal; 3255ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3256ac27a0ecSDave Kleikamp dev_t journal_dev; 3257ac27a0ecSDave Kleikamp int err = 0; 3258ac27a0ecSDave Kleikamp int really_read_only; 3259ac27a0ecSDave Kleikamp 32600390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 32610390131bSFrank Mayhar 3262ac27a0ecSDave Kleikamp if (journal_devnum && 3263ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3264b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3265b31e1552SEric Sandeen "numbers have changed"); 3266ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3267ac27a0ecSDave Kleikamp } else 3268ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3269ac27a0ecSDave Kleikamp 3270ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3271ac27a0ecSDave Kleikamp 3272ac27a0ecSDave Kleikamp /* 3273ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3274ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3275ac27a0ecSDave Kleikamp * can get read-write access to the device. 3276ac27a0ecSDave Kleikamp */ 3277617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3278ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3279b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3280b31e1552SEric Sandeen "required on readonly filesystem"); 3281ac27a0ecSDave Kleikamp if (really_read_only) { 3282b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3283b31e1552SEric Sandeen "unavailable, cannot proceed"); 3284ac27a0ecSDave Kleikamp return -EROFS; 3285ac27a0ecSDave Kleikamp } 3286b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 3287b31e1552SEric Sandeen "be enabled during recovery"); 3288ac27a0ecSDave Kleikamp } 3289ac27a0ecSDave Kleikamp } 3290ac27a0ecSDave Kleikamp 3291ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3292b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 3293b31e1552SEric Sandeen "and inode journals!"); 3294ac27a0ecSDave Kleikamp return -EINVAL; 3295ac27a0ecSDave Kleikamp } 3296ac27a0ecSDave Kleikamp 3297ac27a0ecSDave Kleikamp if (journal_inum) { 3298617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3299ac27a0ecSDave Kleikamp return -EINVAL; 3300ac27a0ecSDave Kleikamp } else { 3301617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3302ac27a0ecSDave Kleikamp return -EINVAL; 3303ac27a0ecSDave Kleikamp } 3304ac27a0ecSDave Kleikamp 330590576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 3306b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 33074776004fSTheodore Ts'o 3308ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 3309dab291afSMingming Cao err = jbd2_journal_update_format(journal); 3310ac27a0ecSDave Kleikamp if (err) { 3311b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 3312dab291afSMingming Cao jbd2_journal_destroy(journal); 3313ac27a0ecSDave Kleikamp return err; 3314ac27a0ecSDave Kleikamp } 3315ac27a0ecSDave Kleikamp } 3316ac27a0ecSDave Kleikamp 3317617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3318dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 3319ac27a0ecSDave Kleikamp if (!err) 3320dab291afSMingming Cao err = jbd2_journal_load(journal); 3321ac27a0ecSDave Kleikamp 3322ac27a0ecSDave Kleikamp if (err) { 3323b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 3324dab291afSMingming Cao jbd2_journal_destroy(journal); 3325ac27a0ecSDave Kleikamp return err; 3326ac27a0ecSDave Kleikamp } 3327ac27a0ecSDave Kleikamp 3328617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 3329617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3330ac27a0ecSDave Kleikamp 3331ac27a0ecSDave Kleikamp if (journal_devnum && 3332ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3333ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 3334ac27a0ecSDave Kleikamp 3335ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 3336e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3337ac27a0ecSDave Kleikamp } 3338ac27a0ecSDave Kleikamp 3339ac27a0ecSDave Kleikamp return 0; 3340ac27a0ecSDave Kleikamp } 3341ac27a0ecSDave Kleikamp 3342e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 3343ac27a0ecSDave Kleikamp { 3344e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3345617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 3346c4be0c1dSTakashi Sato int error = 0; 3347ac27a0ecSDave Kleikamp 3348ac27a0ecSDave Kleikamp if (!sbh) 3349c4be0c1dSTakashi Sato return error; 3350914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 3351914258bfSTheodore Ts'o /* 3352914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 3353914258bfSTheodore Ts'o * superblock failed. This could happen because the 3354914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 3355914258bfSTheodore Ts'o * be a transient write error and maybe the block will 3356914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 3357914258bfSTheodore Ts'o * write and hope for the best. 3358914258bfSTheodore Ts'o */ 3359b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 3360b31e1552SEric Sandeen "superblock detected"); 3361914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3362914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3363914258bfSTheodore Ts'o } 336471290b36STheodore Ts'o /* 336571290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 336671290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 336771290b36STheodore Ts'o * write time when we are mounting the root file system 336871290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 336971290b36STheodore Ts'o * for people who are east of GMT and who make their clock 337071290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 337171290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 337271290b36STheodore Ts'o * to complain and force a full file system check. 337371290b36STheodore Ts'o */ 337471290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 3375ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 3376afc32f7eSTheodore Ts'o es->s_kbytes_written = 3377afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 3378afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 3379afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 33805d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 33815d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 33825d1b1b3fSAneesh Kumar K.V es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( 33835d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 33847234ab2aSTheodore Ts'o sb->s_dirt = 0; 3385ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 3386ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 3387914258bfSTheodore Ts'o if (sync) { 3388c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 3389c4be0c1dSTakashi Sato if (error) 3390c4be0c1dSTakashi Sato return error; 3391c4be0c1dSTakashi Sato 3392c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 3393c4be0c1dSTakashi Sato if (error) { 3394b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 3395b31e1552SEric Sandeen "superblock"); 3396914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3397914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3398914258bfSTheodore Ts'o } 3399914258bfSTheodore Ts'o } 3400c4be0c1dSTakashi Sato return error; 3401ac27a0ecSDave Kleikamp } 3402ac27a0ecSDave Kleikamp 3403ac27a0ecSDave Kleikamp /* 3404ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 3405ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 3406ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 3407ac27a0ecSDave Kleikamp */ 3408617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 3409617ba13bSMingming Cao struct ext4_super_block *es) 3410ac27a0ecSDave Kleikamp { 3411617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 3412ac27a0ecSDave Kleikamp 34130390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 34140390131bSFrank Mayhar BUG_ON(journal != NULL); 34150390131bSFrank Mayhar return; 34160390131bSFrank Mayhar } 3417dab291afSMingming Cao jbd2_journal_lock_updates(journal); 34187ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 34197ffe1ea8SHidehiro Kawai goto out; 34207ffe1ea8SHidehiro Kawai 3421617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 3422ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 3423617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3424e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3425ac27a0ecSDave Kleikamp } 34267ffe1ea8SHidehiro Kawai 34277ffe1ea8SHidehiro Kawai out: 3428dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 3429ac27a0ecSDave Kleikamp } 3430ac27a0ecSDave Kleikamp 3431ac27a0ecSDave Kleikamp /* 3432ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 3433ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 3434ac27a0ecSDave Kleikamp * main filesystem now. 3435ac27a0ecSDave Kleikamp */ 3436617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 3437617ba13bSMingming Cao struct ext4_super_block *es) 3438ac27a0ecSDave Kleikamp { 3439ac27a0ecSDave Kleikamp journal_t *journal; 3440ac27a0ecSDave Kleikamp int j_errno; 3441ac27a0ecSDave Kleikamp const char *errstr; 3442ac27a0ecSDave Kleikamp 34430390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 34440390131bSFrank Mayhar 3445617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 3446ac27a0ecSDave Kleikamp 3447ac27a0ecSDave Kleikamp /* 3448ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 3449617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 3450ac27a0ecSDave Kleikamp */ 3451ac27a0ecSDave Kleikamp 3452dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 3453ac27a0ecSDave Kleikamp if (j_errno) { 3454ac27a0ecSDave Kleikamp char nbuf[16]; 3455ac27a0ecSDave Kleikamp 3456617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 345712062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 3458ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 345912062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 3460ac27a0ecSDave Kleikamp 3461617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3462617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3463e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3464ac27a0ecSDave Kleikamp 3465dab291afSMingming Cao jbd2_journal_clear_err(journal); 3466ac27a0ecSDave Kleikamp } 3467ac27a0ecSDave Kleikamp } 3468ac27a0ecSDave Kleikamp 3469ac27a0ecSDave Kleikamp /* 3470ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 3471ac27a0ecSDave Kleikamp * and wait on the commit. 3472ac27a0ecSDave Kleikamp */ 3473617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 3474ac27a0ecSDave Kleikamp { 3475ac27a0ecSDave Kleikamp journal_t *journal; 34760390131bSFrank Mayhar int ret = 0; 3477ac27a0ecSDave Kleikamp 3478ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 3479ac27a0ecSDave Kleikamp return 0; 3480ac27a0ecSDave Kleikamp 3481617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 34827234ab2aSTheodore Ts'o if (journal) 3483617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 34840390131bSFrank Mayhar 3485ac27a0ecSDave Kleikamp return ret; 3486ac27a0ecSDave Kleikamp } 3487ac27a0ecSDave Kleikamp 3488617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 3489ac27a0ecSDave Kleikamp { 3490ebc1ac16SChristoph Hellwig lock_super(sb); 3491e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3492ebc1ac16SChristoph Hellwig unlock_super(sb); 34930390131bSFrank Mayhar } 3494ac27a0ecSDave Kleikamp 3495617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 3496ac27a0ecSDave Kleikamp { 349714ce0cb4STheodore Ts'o int ret = 0; 34989eddacf9SJan Kara tid_t target; 34998d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3500ac27a0ecSDave Kleikamp 35019bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 35028d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 35038d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 3504ac27a0ecSDave Kleikamp if (wait) 35058d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 35060390131bSFrank Mayhar } 350714ce0cb4STheodore Ts'o return ret; 3508ac27a0ecSDave Kleikamp } 3509ac27a0ecSDave Kleikamp 3510ac27a0ecSDave Kleikamp /* 3511ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 3512ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 3513ac27a0ecSDave Kleikamp */ 3514c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 3515ac27a0ecSDave Kleikamp { 3516c4be0c1dSTakashi Sato int error = 0; 3517c4be0c1dSTakashi Sato journal_t *journal; 3518ac27a0ecSDave Kleikamp 35199ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 35209ca92389STheodore Ts'o return 0; 35219ca92389STheodore Ts'o 3522c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 3523ac27a0ecSDave Kleikamp 3524ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 3525dab291afSMingming Cao jbd2_journal_lock_updates(journal); 35267ffe1ea8SHidehiro Kawai 35277ffe1ea8SHidehiro Kawai /* 35289ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 35299ca92389STheodore Ts'o * the journal. 35307ffe1ea8SHidehiro Kawai */ 3531c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 35329ca92389STheodore Ts'o if (error < 0) { 35339ca92389STheodore Ts'o out: 35349ca92389STheodore Ts'o jbd2_journal_unlock_updates(journal); 35359ca92389STheodore Ts'o return error; 35360390131bSFrank Mayhar } 3537ac27a0ecSDave Kleikamp 3538ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 3539617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3540e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 3541c4be0c1dSTakashi Sato if (error) 3542c4be0c1dSTakashi Sato goto out; 3543c4be0c1dSTakashi Sato return 0; 3544ac27a0ecSDave Kleikamp } 3545ac27a0ecSDave Kleikamp 3546ac27a0ecSDave Kleikamp /* 3547ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 3548ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 3549ac27a0ecSDave Kleikamp */ 3550c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 3551ac27a0ecSDave Kleikamp { 35529ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 35539ca92389STheodore Ts'o return 0; 35549ca92389STheodore Ts'o 3555ac27a0ecSDave Kleikamp lock_super(sb); 35569ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 3557617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3558e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3559ac27a0ecSDave Kleikamp unlock_super(sb); 3560dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 3561c4be0c1dSTakashi Sato return 0; 3562ac27a0ecSDave Kleikamp } 3563ac27a0ecSDave Kleikamp 3564617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 3565ac27a0ecSDave Kleikamp { 3566617ba13bSMingming Cao struct ext4_super_block *es; 3567617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3568617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 3569ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 3570617ba13bSMingming Cao struct ext4_mount_options old_opts; 35718a266467STheodore Ts'o ext4_group_t g; 3572b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3573ac27a0ecSDave Kleikamp int err; 3574ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3575ac27a0ecSDave Kleikamp int i; 3576ac27a0ecSDave Kleikamp #endif 3577ac27a0ecSDave Kleikamp 3578337eb00aSAlessio Igor Bogani lock_kernel(); 3579337eb00aSAlessio Igor Bogani 3580ac27a0ecSDave Kleikamp /* Store the original options */ 3581bbd6851aSAl Viro lock_super(sb); 3582ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 3583ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 3584ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 3585ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 3586ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 358730773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 358830773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 3589ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3590ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 3591ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3592ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 3593ac27a0ecSDave Kleikamp #endif 3594b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 3595b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 3596ac27a0ecSDave Kleikamp 3597ac27a0ecSDave Kleikamp /* 3598ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 3599ac27a0ecSDave Kleikamp */ 3600b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 3601b3881f74STheodore Ts'o &n_blocks_count, 1)) { 3602ac27a0ecSDave Kleikamp err = -EINVAL; 3603ac27a0ecSDave Kleikamp goto restore_opts; 3604ac27a0ecSDave Kleikamp } 3605ac27a0ecSDave Kleikamp 36064ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 360746e665e9SHarvey Harrison ext4_abort(sb, __func__, "Abort forced by user"); 3608ac27a0ecSDave Kleikamp 3609ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3610482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3611ac27a0ecSDave Kleikamp 3612ac27a0ecSDave Kleikamp es = sbi->s_es; 3613ac27a0ecSDave Kleikamp 3614b3881f74STheodore Ts'o if (sbi->s_journal) { 3615617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 3616b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3617b3881f74STheodore Ts'o } 3618ac27a0ecSDave Kleikamp 3619ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 3620bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 36214ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 3622ac27a0ecSDave Kleikamp err = -EROFS; 3623ac27a0ecSDave Kleikamp goto restore_opts; 3624ac27a0ecSDave Kleikamp } 3625ac27a0ecSDave Kleikamp 3626ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 3627ac27a0ecSDave Kleikamp /* 3628ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 3629ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 3630ac27a0ecSDave Kleikamp */ 3631ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 3632ac27a0ecSDave Kleikamp 3633ac27a0ecSDave Kleikamp /* 3634ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 3635ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 3636ac27a0ecSDave Kleikamp * mark the partition as valid again. 3637ac27a0ecSDave Kleikamp */ 3638617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 3639617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 3640ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 3641ac27a0ecSDave Kleikamp 3642a63c9eb2STheodore Ts'o if (sbi->s_journal) 3643617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 3644ac27a0ecSDave Kleikamp } else { 3645a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 3646a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 3647ac27a0ecSDave Kleikamp err = -EROFS; 3648ac27a0ecSDave Kleikamp goto restore_opts; 3649ac27a0ecSDave Kleikamp } 3650ead6596bSEric Sandeen /* 36518a266467STheodore Ts'o * Make sure the group descriptor checksums 36520b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 36538a266467STheodore Ts'o */ 36548a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 36558a266467STheodore Ts'o struct ext4_group_desc *gdp = 36568a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 36578a266467STheodore Ts'o 36588a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 3659b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3660b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 36618a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 36628a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 36638a266467STheodore Ts'o err = -EINVAL; 36648a266467STheodore Ts'o goto restore_opts; 36658a266467STheodore Ts'o } 36668a266467STheodore Ts'o } 36678a266467STheodore Ts'o 36688a266467STheodore Ts'o /* 3669ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 3670ead6596bSEric Sandeen * around from a previously readonly bdev mount, 3671ead6596bSEric Sandeen * require a full umount/remount for now. 3672ead6596bSEric Sandeen */ 3673ead6596bSEric Sandeen if (es->s_last_orphan) { 3674b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 3675ead6596bSEric Sandeen "remount RDWR because of unprocessed " 3676ead6596bSEric Sandeen "orphan inode list. Please " 3677b31e1552SEric Sandeen "umount/remount instead"); 3678ead6596bSEric Sandeen err = -EINVAL; 3679ead6596bSEric Sandeen goto restore_opts; 3680ead6596bSEric Sandeen } 3681ead6596bSEric Sandeen 3682ac27a0ecSDave Kleikamp /* 3683ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 3684ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 3685ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 3686ac27a0ecSDave Kleikamp * the partition.) 3687ac27a0ecSDave Kleikamp */ 36880390131bSFrank Mayhar if (sbi->s_journal) 3689617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3690ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3691617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 3692ac27a0ecSDave Kleikamp goto restore_opts; 3693617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 3694ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 3695ac27a0ecSDave Kleikamp } 3696ac27a0ecSDave Kleikamp } 36976fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 36980390131bSFrank Mayhar if (sbi->s_journal == NULL) 3699e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 37000390131bSFrank Mayhar 3701ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3702ac27a0ecSDave Kleikamp /* Release old quota file names */ 3703ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3704ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 3705ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3706ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 3707ac27a0ecSDave Kleikamp #endif 3708bbd6851aSAl Viro unlock_super(sb); 3709337eb00aSAlessio Igor Bogani unlock_kernel(); 3710ac27a0ecSDave Kleikamp return 0; 37110b8e58a1SAndreas Dilger 3712ac27a0ecSDave Kleikamp restore_opts: 3713ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 3714ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 3715ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 3716ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 3717ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 371830773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 371930773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 3720ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3721ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 3722ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 3723ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 3724ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3725ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3726ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 3727ac27a0ecSDave Kleikamp } 3728ac27a0ecSDave Kleikamp #endif 3729bbd6851aSAl Viro unlock_super(sb); 3730337eb00aSAlessio Igor Bogani unlock_kernel(); 3731ac27a0ecSDave Kleikamp return err; 3732ac27a0ecSDave Kleikamp } 3733ac27a0ecSDave Kleikamp 3734617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 3735ac27a0ecSDave Kleikamp { 3736ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 3737617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3738617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 3739960cc398SPekka Enberg u64 fsid; 3740ac27a0ecSDave Kleikamp 37415e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 37425e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 37436bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 37448df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 37455e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 3746ac27a0ecSDave Kleikamp 3747ac27a0ecSDave Kleikamp /* 37485e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 37495e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 37505e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 3751ac27a0ecSDave Kleikamp */ 3752ac27a0ecSDave Kleikamp 3753ac27a0ecSDave Kleikamp /* 3754ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 3755ac27a0ecSDave Kleikamp * overhead 3756ac27a0ecSDave Kleikamp */ 3757ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 3758ac27a0ecSDave Kleikamp 3759ac27a0ecSDave Kleikamp /* 3760ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 3761ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 3762ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 3763ac27a0ecSDave Kleikamp */ 3764ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 3765617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 3766617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 3767ac27a0ecSDave Kleikamp cond_resched(); 3768ac27a0ecSDave Kleikamp } 3769ac27a0ecSDave Kleikamp 3770ac27a0ecSDave Kleikamp /* 3771ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 3772ac27a0ecSDave Kleikamp * bitmap, and an inode table. 3773ac27a0ecSDave Kleikamp */ 37745e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 37755e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 37765e70030dSBadari Pulavarty smp_wmb(); 37776bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 3778ac27a0ecSDave Kleikamp } 3779ac27a0ecSDave Kleikamp 3780617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 3781ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 37825e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 37836bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 37846bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 3785bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 3786bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 3787ac27a0ecSDave Kleikamp buf->f_bavail = 0; 3788ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 378952d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 3790617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 3791960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 3792960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 3793960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 3794960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 37950b8e58a1SAndreas Dilger 3796ac27a0ecSDave Kleikamp return 0; 3797ac27a0ecSDave Kleikamp } 3798ac27a0ecSDave Kleikamp 37990b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 38000b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 3801ac27a0ecSDave Kleikamp * Process 1 Process 2 3802617ba13bSMingming Cao * ext4_create() quota_sync() 3803dab291afSMingming Cao * jbd2_journal_start() write_dquot() 3804a269eb18SJan Kara * vfs_dq_init() down(dqio_mutex) 3805dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 3806ac27a0ecSDave Kleikamp * 3807ac27a0ecSDave Kleikamp */ 3808ac27a0ecSDave Kleikamp 3809ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3810ac27a0ecSDave Kleikamp 3811ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3812ac27a0ecSDave Kleikamp { 3813ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3814ac27a0ecSDave Kleikamp } 3815ac27a0ecSDave Kleikamp 3816617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3817ac27a0ecSDave Kleikamp { 3818ac27a0ecSDave Kleikamp int ret, err; 3819ac27a0ecSDave Kleikamp handle_t *handle; 3820ac27a0ecSDave Kleikamp struct inode *inode; 3821ac27a0ecSDave Kleikamp 3822ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3823617ba13bSMingming Cao handle = ext4_journal_start(inode, 3824617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3825ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3826ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3827ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3828617ba13bSMingming Cao err = ext4_journal_stop(handle); 3829ac27a0ecSDave Kleikamp if (!ret) 3830ac27a0ecSDave Kleikamp ret = err; 3831ac27a0ecSDave Kleikamp return ret; 3832ac27a0ecSDave Kleikamp } 3833ac27a0ecSDave Kleikamp 3834617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3835ac27a0ecSDave Kleikamp { 3836ac27a0ecSDave Kleikamp int ret, err; 3837ac27a0ecSDave Kleikamp handle_t *handle; 3838ac27a0ecSDave Kleikamp 3839617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3840617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3841ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3842ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3843ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 3844617ba13bSMingming Cao err = ext4_journal_stop(handle); 3845ac27a0ecSDave Kleikamp if (!ret) 3846ac27a0ecSDave Kleikamp ret = err; 3847ac27a0ecSDave Kleikamp return ret; 3848ac27a0ecSDave Kleikamp } 3849ac27a0ecSDave Kleikamp 3850617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 3851ac27a0ecSDave Kleikamp { 3852ac27a0ecSDave Kleikamp int ret, err; 3853ac27a0ecSDave Kleikamp handle_t *handle; 3854ac27a0ecSDave Kleikamp 3855617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3856617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 38579c3013e9SJan Kara if (IS_ERR(handle)) { 38589c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 38599c3013e9SJan Kara dquot_release(dquot); 3860ac27a0ecSDave Kleikamp return PTR_ERR(handle); 38619c3013e9SJan Kara } 3862ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 3863617ba13bSMingming Cao err = ext4_journal_stop(handle); 3864ac27a0ecSDave Kleikamp if (!ret) 3865ac27a0ecSDave Kleikamp ret = err; 3866ac27a0ecSDave Kleikamp return ret; 3867ac27a0ecSDave Kleikamp } 3868ac27a0ecSDave Kleikamp 3869617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 3870ac27a0ecSDave Kleikamp { 38712c8be6b2SJan Kara /* Are we journaling quotas? */ 3872617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 3873617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 3874ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 3875617ba13bSMingming Cao return ext4_write_dquot(dquot); 3876ac27a0ecSDave Kleikamp } else { 3877ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 3878ac27a0ecSDave Kleikamp } 3879ac27a0ecSDave Kleikamp } 3880ac27a0ecSDave Kleikamp 3881617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 3882ac27a0ecSDave Kleikamp { 3883ac27a0ecSDave Kleikamp int ret, err; 3884ac27a0ecSDave Kleikamp handle_t *handle; 3885ac27a0ecSDave Kleikamp 3886ac27a0ecSDave Kleikamp /* Data block + inode block */ 3887617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 3888ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3889ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3890ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 3891617ba13bSMingming Cao err = ext4_journal_stop(handle); 3892ac27a0ecSDave Kleikamp if (!ret) 3893ac27a0ecSDave Kleikamp ret = err; 3894ac27a0ecSDave Kleikamp return ret; 3895ac27a0ecSDave Kleikamp } 3896ac27a0ecSDave Kleikamp 3897ac27a0ecSDave Kleikamp /* 3898ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 3899ac27a0ecSDave Kleikamp * the quota file and such... 3900ac27a0ecSDave Kleikamp */ 3901617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 3902ac27a0ecSDave Kleikamp { 3903617ba13bSMingming Cao return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 3904617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 3905ac27a0ecSDave Kleikamp } 3906ac27a0ecSDave Kleikamp 3907ac27a0ecSDave Kleikamp /* 3908ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 3909ac27a0ecSDave Kleikamp */ 3910617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 39118264613dSAl Viro char *name, int remount) 3912ac27a0ecSDave Kleikamp { 3913ac27a0ecSDave Kleikamp int err; 39148264613dSAl Viro struct path path; 3915ac27a0ecSDave Kleikamp 3916ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 3917ac27a0ecSDave Kleikamp return -EINVAL; 39188264613dSAl Viro /* When remounting, no checks are needed and in fact, name is NULL */ 39190623543bSJan Kara if (remount) 39208264613dSAl Viro return vfs_quota_on(sb, type, format_id, name, remount); 39210623543bSJan Kara 39228264613dSAl Viro err = kern_path(name, LOOKUP_FOLLOW, &path); 3923ac27a0ecSDave Kleikamp if (err) 3924ac27a0ecSDave Kleikamp return err; 39250623543bSJan Kara 3926ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 39278264613dSAl Viro if (path.mnt->mnt_sb != sb) { 39288264613dSAl Viro path_put(&path); 3929ac27a0ecSDave Kleikamp return -EXDEV; 3930ac27a0ecSDave Kleikamp } 39310623543bSJan Kara /* Journaling quota? */ 39320623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 39332b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 39348264613dSAl Viro if (path.dentry->d_parent != sb->s_root) 3935b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3936b31e1552SEric Sandeen "Quota file not on filesystem root. " 3937b31e1552SEric Sandeen "Journaled quota will not work"); 39380623543bSJan Kara } 39390623543bSJan Kara 39400623543bSJan Kara /* 39410623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 39420623543bSJan Kara * all updates to the file when we bypass pagecache... 39430623543bSJan Kara */ 39440390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 39450390131bSFrank Mayhar ext4_should_journal_data(path.dentry->d_inode)) { 39460623543bSJan Kara /* 39470623543bSJan Kara * We don't need to lock updates but journal_flush() could 39480623543bSJan Kara * otherwise be livelocked... 39490623543bSJan Kara */ 39500623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 39517ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 39520623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 39537ffe1ea8SHidehiro Kawai if (err) { 39548264613dSAl Viro path_put(&path); 39557ffe1ea8SHidehiro Kawai return err; 39567ffe1ea8SHidehiro Kawai } 39570623543bSJan Kara } 39580623543bSJan Kara 39598264613dSAl Viro err = vfs_quota_on_path(sb, type, format_id, &path); 39608264613dSAl Viro path_put(&path); 396177e69dacSAl Viro return err; 3962ac27a0ecSDave Kleikamp } 3963ac27a0ecSDave Kleikamp 3964ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 3965ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 3966ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 3967ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 3968617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 3969ac27a0ecSDave Kleikamp size_t len, loff_t off) 3970ac27a0ecSDave Kleikamp { 3971ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3972725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3973ac27a0ecSDave Kleikamp int err = 0; 3974ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3975ac27a0ecSDave Kleikamp int tocopy; 3976ac27a0ecSDave Kleikamp size_t toread; 3977ac27a0ecSDave Kleikamp struct buffer_head *bh; 3978ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 3979ac27a0ecSDave Kleikamp 3980ac27a0ecSDave Kleikamp if (off > i_size) 3981ac27a0ecSDave Kleikamp return 0; 3982ac27a0ecSDave Kleikamp if (off+len > i_size) 3983ac27a0ecSDave Kleikamp len = i_size-off; 3984ac27a0ecSDave Kleikamp toread = len; 3985ac27a0ecSDave Kleikamp while (toread > 0) { 3986ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 3987ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 3988617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 3989ac27a0ecSDave Kleikamp if (err) 3990ac27a0ecSDave Kleikamp return err; 3991ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 3992ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 3993ac27a0ecSDave Kleikamp else 3994ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 3995ac27a0ecSDave Kleikamp brelse(bh); 3996ac27a0ecSDave Kleikamp offset = 0; 3997ac27a0ecSDave Kleikamp toread -= tocopy; 3998ac27a0ecSDave Kleikamp data += tocopy; 3999ac27a0ecSDave Kleikamp blk++; 4000ac27a0ecSDave Kleikamp } 4001ac27a0ecSDave Kleikamp return len; 4002ac27a0ecSDave Kleikamp } 4003ac27a0ecSDave Kleikamp 4004ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 4005ac27a0ecSDave Kleikamp * enough credits) */ 4006617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 4007ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 4008ac27a0ecSDave Kleikamp { 4009ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4010725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4011ac27a0ecSDave Kleikamp int err = 0; 4012ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4013617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 4014ac27a0ecSDave Kleikamp struct buffer_head *bh; 4015ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 4016ac27a0ecSDave Kleikamp 40170390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 4018b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4019b31e1552SEric Sandeen " cancelled because transaction is not started", 40209c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 40219c3013e9SJan Kara return -EIO; 40229c3013e9SJan Kara } 4023*67eeb568SDmitry Monakhov /* 4024*67eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 4025*67eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 4026*67eeb568SDmitry Monakhov */ 4027*67eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 4028*67eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4029*67eeb568SDmitry Monakhov " cancelled because not block aligned", 4030*67eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 4031*67eeb568SDmitry Monakhov return -EIO; 4032*67eeb568SDmitry Monakhov } 4033*67eeb568SDmitry Monakhov 4034ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 4035617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 4036ac27a0ecSDave Kleikamp if (!bh) 4037ac27a0ecSDave Kleikamp goto out; 4038ac27a0ecSDave Kleikamp if (journal_quota) { 4039617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 4040ac27a0ecSDave Kleikamp if (err) { 4041ac27a0ecSDave Kleikamp brelse(bh); 4042ac27a0ecSDave Kleikamp goto out; 4043ac27a0ecSDave Kleikamp } 4044ac27a0ecSDave Kleikamp } 4045ac27a0ecSDave Kleikamp lock_buffer(bh); 4046*67eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 4047ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 4048ac27a0ecSDave Kleikamp unlock_buffer(bh); 4049ac27a0ecSDave Kleikamp if (journal_quota) 40500390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 4051ac27a0ecSDave Kleikamp else { 4052ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 4053678aaf48SJan Kara err = ext4_jbd2_file_inode(handle, inode); 4054ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 4055ac27a0ecSDave Kleikamp } 4056ac27a0ecSDave Kleikamp brelse(bh); 4057ac27a0ecSDave Kleikamp out: 4058*67eeb568SDmitry Monakhov if (err) { 40594d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 4060ac27a0ecSDave Kleikamp return err; 40614d04e4fbSJan Kara } 4062*67eeb568SDmitry Monakhov if (inode->i_size < off + len) { 4063*67eeb568SDmitry Monakhov i_size_write(inode, off + len); 4064617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 4065ac27a0ecSDave Kleikamp } 4066ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 4067617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 4068ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 4069*67eeb568SDmitry Monakhov return len; 4070ac27a0ecSDave Kleikamp } 4071ac27a0ecSDave Kleikamp 4072ac27a0ecSDave Kleikamp #endif 4073ac27a0ecSDave Kleikamp 40740b8e58a1SAndreas Dilger static int ext4_get_sb(struct file_system_type *fs_type, int flags, 40750b8e58a1SAndreas Dilger const char *dev_name, void *data, struct vfsmount *mnt) 4076ac27a0ecSDave Kleikamp { 4077617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); 4078ac27a0ecSDave Kleikamp } 4079ac27a0ecSDave Kleikamp 4080a214238dSTheodore Ts'o #if !defined(CONTIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 408124b58424STheodore Ts'o static struct file_system_type ext2_fs_type = { 408224b58424STheodore Ts'o .owner = THIS_MODULE, 408324b58424STheodore Ts'o .name = "ext2", 408424b58424STheodore Ts'o .get_sb = ext4_get_sb, 408524b58424STheodore Ts'o .kill_sb = kill_block_super, 408624b58424STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 408724b58424STheodore Ts'o }; 408824b58424STheodore Ts'o 408924b58424STheodore Ts'o static inline void register_as_ext2(void) 409024b58424STheodore Ts'o { 409124b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 409224b58424STheodore Ts'o if (err) 409324b58424STheodore Ts'o printk(KERN_WARNING 409424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 409524b58424STheodore Ts'o } 409624b58424STheodore Ts'o 409724b58424STheodore Ts'o static inline void unregister_as_ext2(void) 409824b58424STheodore Ts'o { 409924b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 410024b58424STheodore Ts'o } 410151b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 410224b58424STheodore Ts'o #else 410324b58424STheodore Ts'o static inline void register_as_ext2(void) { } 410424b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 410524b58424STheodore Ts'o #endif 410624b58424STheodore Ts'o 4107a214238dSTheodore Ts'o #if !defined(CONTIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 410824b58424STheodore Ts'o static struct file_system_type ext3_fs_type = { 410924b58424STheodore Ts'o .owner = THIS_MODULE, 411024b58424STheodore Ts'o .name = "ext3", 411124b58424STheodore Ts'o .get_sb = ext4_get_sb, 411224b58424STheodore Ts'o .kill_sb = kill_block_super, 411324b58424STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 411424b58424STheodore Ts'o }; 411524b58424STheodore Ts'o 411624b58424STheodore Ts'o static inline void register_as_ext3(void) 411724b58424STheodore Ts'o { 411824b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 411924b58424STheodore Ts'o if (err) 412024b58424STheodore Ts'o printk(KERN_WARNING 412124b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 412224b58424STheodore Ts'o } 412324b58424STheodore Ts'o 412424b58424STheodore Ts'o static inline void unregister_as_ext3(void) 412524b58424STheodore Ts'o { 412624b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 412724b58424STheodore Ts'o } 412851b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 412924b58424STheodore Ts'o #else 413024b58424STheodore Ts'o static inline void register_as_ext3(void) { } 413124b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 413224b58424STheodore Ts'o #endif 413324b58424STheodore Ts'o 413403010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 4135ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 413603010a33STheodore Ts'o .name = "ext4", 4137617ba13bSMingming Cao .get_sb = ext4_get_sb, 4138ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 4139ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 4140ac27a0ecSDave Kleikamp }; 4141ac27a0ecSDave Kleikamp 4142617ba13bSMingming Cao static int __init init_ext4_fs(void) 4143ac27a0ecSDave Kleikamp { 4144c9de560dSAlex Tomas int err; 4145c9de560dSAlex Tomas 41466fd058f7STheodore Ts'o err = init_ext4_system_zone(); 41476fd058f7STheodore Ts'o if (err) 41486fd058f7STheodore Ts'o return err; 41493197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 41503197ebdbSTheodore Ts'o if (!ext4_kset) 41516fd058f7STheodore Ts'o goto out4; 41529f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 4153c9de560dSAlex Tomas err = init_ext4_mballoc(); 4154ac27a0ecSDave Kleikamp if (err) 41556fd058f7STheodore Ts'o goto out3; 4156c9de560dSAlex Tomas 4157c9de560dSAlex Tomas err = init_ext4_xattr(); 4158c9de560dSAlex Tomas if (err) 4159c9de560dSAlex Tomas goto out2; 4160ac27a0ecSDave Kleikamp err = init_inodecache(); 4161ac27a0ecSDave Kleikamp if (err) 4162ac27a0ecSDave Kleikamp goto out1; 416324b58424STheodore Ts'o register_as_ext2(); 416424b58424STheodore Ts'o register_as_ext3(); 416503010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 4166ac27a0ecSDave Kleikamp if (err) 4167ac27a0ecSDave Kleikamp goto out; 4168ac27a0ecSDave Kleikamp return 0; 4169ac27a0ecSDave Kleikamp out: 417024b58424STheodore Ts'o unregister_as_ext2(); 417124b58424STheodore Ts'o unregister_as_ext3(); 4172ac27a0ecSDave Kleikamp destroy_inodecache(); 4173ac27a0ecSDave Kleikamp out1: 4174617ba13bSMingming Cao exit_ext4_xattr(); 4175c9de560dSAlex Tomas out2: 4176c9de560dSAlex Tomas exit_ext4_mballoc(); 41776fd058f7STheodore Ts'o out3: 41786fd058f7STheodore Ts'o remove_proc_entry("fs/ext4", NULL); 41796fd058f7STheodore Ts'o kset_unregister(ext4_kset); 41806fd058f7STheodore Ts'o out4: 41816fd058f7STheodore Ts'o exit_ext4_system_zone(); 4182ac27a0ecSDave Kleikamp return err; 4183ac27a0ecSDave Kleikamp } 4184ac27a0ecSDave Kleikamp 4185617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 4186ac27a0ecSDave Kleikamp { 418724b58424STheodore Ts'o unregister_as_ext2(); 418824b58424STheodore Ts'o unregister_as_ext3(); 418903010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 4190ac27a0ecSDave Kleikamp destroy_inodecache(); 4191617ba13bSMingming Cao exit_ext4_xattr(); 4192c9de560dSAlex Tomas exit_ext4_mballoc(); 41939f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 41943197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 41956fd058f7STheodore Ts'o exit_ext4_system_zone(); 4196ac27a0ecSDave Kleikamp } 4197ac27a0ecSDave Kleikamp 4198ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 419983982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 4200ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 4201617ba13bSMingming Cao module_init(init_ext4_fs) 4202617ba13bSMingming Cao module_exit(exit_ext4_fs) 4203