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 350617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 351ac27a0ecSDave Kleikamp char nbuf[16]) 352ac27a0ecSDave Kleikamp { 353ac27a0ecSDave Kleikamp char *errstr = NULL; 354ac27a0ecSDave Kleikamp 355ac27a0ecSDave Kleikamp switch (errno) { 356ac27a0ecSDave Kleikamp case -EIO: 357ac27a0ecSDave Kleikamp errstr = "IO failure"; 358ac27a0ecSDave Kleikamp break; 359ac27a0ecSDave Kleikamp case -ENOMEM: 360ac27a0ecSDave Kleikamp errstr = "Out of memory"; 361ac27a0ecSDave Kleikamp break; 362ac27a0ecSDave Kleikamp case -EROFS: 36378f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 36478f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 365ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 366ac27a0ecSDave Kleikamp else 367ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 368ac27a0ecSDave Kleikamp break; 369ac27a0ecSDave Kleikamp default: 370ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 371ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 372ac27a0ecSDave Kleikamp * NULL. */ 373ac27a0ecSDave Kleikamp if (nbuf) { 374ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 375ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 376ac27a0ecSDave Kleikamp errstr = nbuf; 377ac27a0ecSDave Kleikamp } 378ac27a0ecSDave Kleikamp break; 379ac27a0ecSDave Kleikamp } 380ac27a0ecSDave Kleikamp 381ac27a0ecSDave Kleikamp return errstr; 382ac27a0ecSDave Kleikamp } 383ac27a0ecSDave Kleikamp 384617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 385ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 386ac27a0ecSDave Kleikamp 3872b2d6d01STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, int errno) 388ac27a0ecSDave Kleikamp { 389ac27a0ecSDave Kleikamp char nbuf[16]; 390ac27a0ecSDave Kleikamp const char *errstr; 391ac27a0ecSDave Kleikamp 392ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 393ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 394ac27a0ecSDave Kleikamp * an error. */ 395ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 396ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 397ac27a0ecSDave Kleikamp return; 398ac27a0ecSDave Kleikamp 399617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 400617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", 401ac27a0ecSDave Kleikamp sb->s_id, function, errstr); 402ac27a0ecSDave Kleikamp 403617ba13bSMingming Cao ext4_handle_error(sb); 404ac27a0ecSDave Kleikamp } 405ac27a0ecSDave Kleikamp 406ac27a0ecSDave Kleikamp /* 407617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 408ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 409ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 410ac27a0ecSDave Kleikamp * 411ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 412ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 413ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 414ac27a0ecSDave Kleikamp */ 415ac27a0ecSDave Kleikamp 416617ba13bSMingming Cao void ext4_abort(struct super_block *sb, const char *function, 417ac27a0ecSDave Kleikamp const char *fmt, ...) 418ac27a0ecSDave Kleikamp { 419ac27a0ecSDave Kleikamp va_list args; 420ac27a0ecSDave Kleikamp 421ac27a0ecSDave Kleikamp va_start(args, fmt); 422617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 423ac27a0ecSDave Kleikamp vprintk(fmt, args); 424ac27a0ecSDave Kleikamp printk("\n"); 425ac27a0ecSDave Kleikamp va_end(args); 426ac27a0ecSDave Kleikamp 427ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 428617ba13bSMingming Cao panic("EXT4-fs panic from previous error\n"); 429ac27a0ecSDave Kleikamp 430ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 431ac27a0ecSDave Kleikamp return; 432ac27a0ecSDave Kleikamp 433b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 434617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 435ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4364ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 437ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 438dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 439ac27a0ecSDave Kleikamp } 440ac27a0ecSDave Kleikamp 441b31e1552SEric Sandeen void ext4_msg (struct super_block * sb, const char *prefix, 442b31e1552SEric Sandeen const char *fmt, ...) 443b31e1552SEric Sandeen { 444b31e1552SEric Sandeen va_list args; 445b31e1552SEric Sandeen 446b31e1552SEric Sandeen va_start(args, fmt); 447b31e1552SEric Sandeen printk("%sEXT4-fs (%s): ", prefix, sb->s_id); 448b31e1552SEric Sandeen vprintk(fmt, args); 449b31e1552SEric Sandeen printk("\n"); 450b31e1552SEric Sandeen va_end(args); 451b31e1552SEric Sandeen } 452b31e1552SEric Sandeen 45312062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 454ac27a0ecSDave Kleikamp const char *fmt, ...) 455ac27a0ecSDave Kleikamp { 456ac27a0ecSDave Kleikamp va_list args; 457ac27a0ecSDave Kleikamp 458ac27a0ecSDave Kleikamp va_start(args, fmt); 459617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", 460ac27a0ecSDave Kleikamp sb->s_id, function); 461ac27a0ecSDave Kleikamp vprintk(fmt, args); 462ac27a0ecSDave Kleikamp printk("\n"); 463ac27a0ecSDave Kleikamp va_end(args); 464ac27a0ecSDave Kleikamp } 465ac27a0ecSDave Kleikamp 4665d1b1b3fSAneesh Kumar K.V void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, 4675d1b1b3fSAneesh Kumar K.V const char *function, const char *fmt, ...) 4685d1b1b3fSAneesh Kumar K.V __releases(bitlock) 4695d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 4705d1b1b3fSAneesh Kumar K.V { 4715d1b1b3fSAneesh Kumar K.V va_list args; 4725d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4735d1b1b3fSAneesh Kumar K.V 4745d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 4755d1b1b3fSAneesh Kumar K.V printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 4765d1b1b3fSAneesh Kumar K.V vprintk(fmt, args); 4775d1b1b3fSAneesh Kumar K.V printk("\n"); 4785d1b1b3fSAneesh Kumar K.V va_end(args); 4795d1b1b3fSAneesh Kumar K.V 4805d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 4815d1b1b3fSAneesh Kumar K.V EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4825d1b1b3fSAneesh Kumar K.V es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 483e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 4845d1b1b3fSAneesh Kumar K.V return; 4855d1b1b3fSAneesh Kumar K.V } 4865d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 4875d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 4885d1b1b3fSAneesh Kumar K.V /* 4895d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 4905d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 4915d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 4925d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 4935d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 4945d1b1b3fSAneesh Kumar K.V * ext4_grp_locked_error() to distinguish beween the 4955d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 4965d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 4975d1b1b3fSAneesh Kumar K.V * more appropriate error code. 4985d1b1b3fSAneesh Kumar K.V */ 4995d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 5005d1b1b3fSAneesh Kumar K.V return; 5015d1b1b3fSAneesh Kumar K.V } 5025d1b1b3fSAneesh Kumar K.V 503617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 504ac27a0ecSDave Kleikamp { 505617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 506ac27a0ecSDave Kleikamp 507617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 508ac27a0ecSDave Kleikamp return; 509ac27a0ecSDave Kleikamp 51012062dddSEric Sandeen ext4_warning(sb, 511ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 512ac27a0ecSDave Kleikamp "running e2fsck is recommended", 513617ba13bSMingming Cao EXT4_DYNAMIC_REV); 514ac27a0ecSDave Kleikamp 515617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 516617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 517617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 518ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 519ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 520ac27a0ecSDave Kleikamp 521ac27a0ecSDave Kleikamp /* 522ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 523ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 524ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 525ac27a0ecSDave Kleikamp */ 526ac27a0ecSDave Kleikamp } 527ac27a0ecSDave Kleikamp 528ac27a0ecSDave Kleikamp /* 529ac27a0ecSDave Kleikamp * Open the external journal device 530ac27a0ecSDave Kleikamp */ 531b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 532ac27a0ecSDave Kleikamp { 533ac27a0ecSDave Kleikamp struct block_device *bdev; 534ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 535ac27a0ecSDave Kleikamp 536ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 537ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 538ac27a0ecSDave Kleikamp goto fail; 539ac27a0ecSDave Kleikamp return bdev; 540ac27a0ecSDave Kleikamp 541ac27a0ecSDave Kleikamp fail: 542b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 543ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 544ac27a0ecSDave Kleikamp return NULL; 545ac27a0ecSDave Kleikamp } 546ac27a0ecSDave Kleikamp 547ac27a0ecSDave Kleikamp /* 548ac27a0ecSDave Kleikamp * Release the journal device 549ac27a0ecSDave Kleikamp */ 550617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 551ac27a0ecSDave Kleikamp { 552ac27a0ecSDave Kleikamp bd_release(bdev); 5539a1c3542SAl Viro return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 554ac27a0ecSDave Kleikamp } 555ac27a0ecSDave Kleikamp 556617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 557ac27a0ecSDave Kleikamp { 558ac27a0ecSDave Kleikamp struct block_device *bdev; 559ac27a0ecSDave Kleikamp int ret = -ENODEV; 560ac27a0ecSDave Kleikamp 561ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 562ac27a0ecSDave Kleikamp if (bdev) { 563617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 564ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 565ac27a0ecSDave Kleikamp } 566ac27a0ecSDave Kleikamp return ret; 567ac27a0ecSDave Kleikamp } 568ac27a0ecSDave Kleikamp 569ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 570ac27a0ecSDave Kleikamp { 571617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 572ac27a0ecSDave Kleikamp } 573ac27a0ecSDave Kleikamp 574617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 575ac27a0ecSDave Kleikamp { 576ac27a0ecSDave Kleikamp struct list_head *l; 577ac27a0ecSDave Kleikamp 578b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 579ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 580ac27a0ecSDave Kleikamp 581ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 582ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 583ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 584ac27a0ecSDave Kleikamp printk(KERN_ERR " " 585ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 586ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 587ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 588ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 589ac27a0ecSDave Kleikamp } 590ac27a0ecSDave Kleikamp } 591ac27a0ecSDave Kleikamp 592617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 593ac27a0ecSDave Kleikamp { 594617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 595617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 596ef2cabf7SHidehiro Kawai int i, err; 597ac27a0ecSDave Kleikamp 5984c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 5994c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 6004c0425ffSMingming Cao 601a9e220f8SAl Viro lock_super(sb); 6026cfd0148SChristoph Hellwig lock_kernel(); 6038c85e125SChristoph Hellwig if (sb->s_dirt) 604ebc1ac16SChristoph Hellwig ext4_commit_super(sb, 1); 6058c85e125SChristoph Hellwig 6060390131bSFrank Mayhar if (sbi->s_journal) { 607ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 60847b4a50bSJan Kara sbi->s_journal = NULL; 609ef2cabf7SHidehiro Kawai if (err < 0) 6100390131bSFrank Mayhar ext4_abort(sb, __func__, 6110390131bSFrank Mayhar "Couldn't clean up the journal"); 6120390131bSFrank Mayhar } 613d4edac31SJosef Bacik 614d4edac31SJosef Bacik ext4_release_system_zone(sb); 615d4edac31SJosef Bacik ext4_mb_release(sb); 616d4edac31SJosef Bacik ext4_ext_release(sb); 617d4edac31SJosef Bacik ext4_xattr_put_super(sb); 618d4edac31SJosef Bacik 619ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 620617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 621ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 622e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 623ac27a0ecSDave Kleikamp } 624240799cdSTheodore Ts'o if (sbi->s_proc) { 6259f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 626240799cdSTheodore Ts'o } 6273197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 628ac27a0ecSDave Kleikamp 629ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 630ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 631ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 632c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 633c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 634c5ca7c76STheodore Ts'o else 635772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 636ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 637ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 638ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 6396bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 640ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 641ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 642ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 643ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 644ac27a0ecSDave Kleikamp #endif 645ac27a0ecSDave Kleikamp 646ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 647ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 648ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 649ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 650ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 651ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 652ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 653ac27a0ecSDave Kleikamp 654f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 655ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 656ac27a0ecSDave Kleikamp /* 657ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 658ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 659ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 660ac27a0ecSDave Kleikamp */ 661ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 662f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 663617ba13bSMingming Cao ext4_blkdev_remove(sbi); 664ac27a0ecSDave Kleikamp } 665ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 6663197ebdbSTheodore Ts'o /* 6673197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 6683197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 6693197ebdbSTheodore Ts'o */ 6703197ebdbSTheodore Ts'o unlock_kernel(); 6713197ebdbSTheodore Ts'o unlock_super(sb); 6723197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 6733197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 674705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 675ac27a0ecSDave Kleikamp kfree(sbi); 676ac27a0ecSDave Kleikamp } 677ac27a0ecSDave Kleikamp 678e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 679ac27a0ecSDave Kleikamp 680ac27a0ecSDave Kleikamp /* 681ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 682ac27a0ecSDave Kleikamp */ 683617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 684ac27a0ecSDave Kleikamp { 685617ba13bSMingming Cao struct ext4_inode_info *ei; 686ac27a0ecSDave Kleikamp 687e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 688ac27a0ecSDave Kleikamp if (!ei) 689ac27a0ecSDave Kleikamp return NULL; 6900b8e58a1SAndreas Dilger 691ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 69291246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 693a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 694c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 695c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 6960390131bSFrank Mayhar /* 6970390131bSFrank Mayhar * Note: We can be called before EXT4_SB(sb)->s_journal is set, 6980390131bSFrank Mayhar * therefore it can be null here. Don't check it, just initialize 6990390131bSFrank Mayhar * jinode. 7000390131bSFrank Mayhar */ 701678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 702d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 703d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 704d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 7059d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 706d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 707d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 708a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 709a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 710a9e7f447SDmitry Monakhov #endif 711c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 712*744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 7138d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 714b436b9beSJan Kara ei->i_sync_tid = 0; 715b436b9beSJan Kara ei->i_datasync_tid = 0; 7160b8e58a1SAndreas Dilger 717ac27a0ecSDave Kleikamp return &ei->vfs_inode; 718ac27a0ecSDave Kleikamp } 719ac27a0ecSDave Kleikamp 720617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 721ac27a0ecSDave Kleikamp { 7229f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 723b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 724b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 725b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 7269f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 7279f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 7289f7dd93dSVasily Averin true); 7299f7dd93dSVasily Averin dump_stack(); 7309f7dd93dSVasily Averin } 731617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 732ac27a0ecSDave Kleikamp } 733ac27a0ecSDave Kleikamp 73451cc5068SAlexey Dobriyan static void init_once(void *foo) 735ac27a0ecSDave Kleikamp { 736617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 737ac27a0ecSDave Kleikamp 738ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 73903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 740ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 741ac27a0ecSDave Kleikamp #endif 7420e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 743ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 744ac27a0ecSDave Kleikamp } 745ac27a0ecSDave Kleikamp 746ac27a0ecSDave Kleikamp static int init_inodecache(void) 747ac27a0ecSDave Kleikamp { 748617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 749617ba13bSMingming Cao sizeof(struct ext4_inode_info), 750ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 751ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 75220c2df83SPaul Mundt init_once); 753617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 754ac27a0ecSDave Kleikamp return -ENOMEM; 755ac27a0ecSDave Kleikamp return 0; 756ac27a0ecSDave Kleikamp } 757ac27a0ecSDave Kleikamp 758ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 759ac27a0ecSDave Kleikamp { 760617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 761ac27a0ecSDave Kleikamp } 762ac27a0ecSDave Kleikamp 763617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 764ac27a0ecSDave Kleikamp { 765c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 7660390131bSFrank Mayhar if (EXT4_JOURNAL(inode)) 767678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 768678aaf48SJan Kara &EXT4_I(inode)->jinode); 769ac27a0ecSDave Kleikamp } 770ac27a0ecSDave Kleikamp 7712b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 7722b2d6d01STheodore Ts'o struct super_block *sb) 773ac27a0ecSDave Kleikamp { 774ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 775617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 776ac27a0ecSDave Kleikamp 7775a20bdfcSJan Kara if (sbi->s_jquota_fmt) { 7785a20bdfcSJan Kara char *fmtname = ""; 7795a20bdfcSJan Kara 7805a20bdfcSJan Kara switch (sbi->s_jquota_fmt) { 7815a20bdfcSJan Kara case QFMT_VFS_OLD: 7825a20bdfcSJan Kara fmtname = "vfsold"; 7835a20bdfcSJan Kara break; 7845a20bdfcSJan Kara case QFMT_VFS_V0: 7855a20bdfcSJan Kara fmtname = "vfsv0"; 7865a20bdfcSJan Kara break; 7875a20bdfcSJan Kara case QFMT_VFS_V1: 7885a20bdfcSJan Kara fmtname = "vfsv1"; 7895a20bdfcSJan Kara break; 7905a20bdfcSJan Kara } 7915a20bdfcSJan Kara seq_printf(seq, ",jqfmt=%s", fmtname); 7925a20bdfcSJan Kara } 793ac27a0ecSDave Kleikamp 794ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 795ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 796ac27a0ecSDave Kleikamp 797ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 798ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 799ac27a0ecSDave Kleikamp 800482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA)) 801ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 802ac27a0ecSDave Kleikamp 803482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA)) 804ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 805ac27a0ecSDave Kleikamp #endif 806ac27a0ecSDave Kleikamp } 807ac27a0ecSDave Kleikamp 808d9c9bef1SMiklos Szeredi /* 809d9c9bef1SMiklos Szeredi * Show an option if 810d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 811d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 812d9c9bef1SMiklos Szeredi */ 813617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 814ac27a0ecSDave Kleikamp { 815aa22df2cSAneesh Kumar K.V int def_errors; 816aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 817ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 818d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 819d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 820d9c9bef1SMiklos Szeredi 821d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 822aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 823d9c9bef1SMiklos Szeredi 824d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 825d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 826d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 827d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 828aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 829d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 830d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 831d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 832d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 833d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 834d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 835d9c9bef1SMiklos Szeredi } 836d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 837d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 838d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 839d9c9bef1SMiklos Szeredi } 840bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 841d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 842bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 843d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 844bb4f397aSAneesh Kumar K.V } 845bb4f397aSAneesh Kumar K.V } 846aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 847bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 848aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 849d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 850aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 851d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 852aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 853d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 854d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 855d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 85603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 857aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 858aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 859d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 860d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 861d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 862d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 863d9c9bef1SMiklos Szeredi } 864d9c9bef1SMiklos Szeredi #endif 86503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 866aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 867d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 868d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 869d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 870d9c9bef1SMiklos Szeredi #endif 87130773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 872d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 873d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 874d9c9bef1SMiklos Szeredi } 87530773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 87630773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 87730773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 87830773840STheodore Ts'o } 87930773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 88030773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 88130773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 88230773840STheodore Ts'o } 88330773840STheodore Ts'o 884571640caSEric Sandeen /* 885571640caSEric Sandeen * We're changing the default of barrier mount option, so 886571640caSEric Sandeen * let's always display its mount state so it's clear what its 887571640caSEric Sandeen * status is. 888571640caSEric Sandeen */ 889571640caSEric Sandeen seq_puts(seq, ",barrier="); 890571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 891cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 892cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 893d9c9bef1SMiklos Szeredi if (test_opt(sb, NOBH)) 894d9c9bef1SMiklos Szeredi seq_puts(seq, ",nobh"); 89525ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 89625ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 897dd919b98SAneesh Kumar K.V if (!test_opt(sb, DELALLOC)) 898dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 899dd919b98SAneesh Kumar K.V 900ac27a0ecSDave Kleikamp 901cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 902cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 903aa22df2cSAneesh Kumar K.V /* 904aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 905aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 906aa22df2cSAneesh Kumar K.V */ 907617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 908ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 909617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 910ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 911617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 912ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 913ac27a0ecSDave Kleikamp 914240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 915240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 916240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 917240799cdSTheodore Ts'o 9185bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 9195bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 9205bf5683aSHidehiro Kawai 921afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 92206705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 923afd4672dSTheodore Ts'o 9245328e635SEric Sandeen if (test_opt(sb, DISCARD)) 9255328e635SEric Sandeen seq_puts(seq, ",discard"); 9265328e635SEric Sandeen 927e3bb52aeSEric Sandeen if (test_opt(sb, NOLOAD)) 928e3bb52aeSEric Sandeen seq_puts(seq, ",norecovery"); 929e3bb52aeSEric Sandeen 930*744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) 931*744692dcSJiaying Zhang seq_puts(seq, ",dioread_nolock"); 932*744692dcSJiaying Zhang 933617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 9340b8e58a1SAndreas Dilger 935ac27a0ecSDave Kleikamp return 0; 936ac27a0ecSDave Kleikamp } 937ac27a0ecSDave Kleikamp 9381b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 9391b961ac0SChristoph Hellwig u64 ino, u32 generation) 940ac27a0ecSDave Kleikamp { 941ac27a0ecSDave Kleikamp struct inode *inode; 942ac27a0ecSDave Kleikamp 943617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 944ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 945617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 946ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 947ac27a0ecSDave Kleikamp 948ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 949ac27a0ecSDave Kleikamp * 950617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 951ac27a0ecSDave Kleikamp * deleted, so we should be safe. 952ac27a0ecSDave Kleikamp * 953ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 954ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 955ac27a0ecSDave Kleikamp */ 9561d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 9571d1fe1eeSDavid Howells if (IS_ERR(inode)) 9581d1fe1eeSDavid Howells return ERR_CAST(inode); 9591d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 960ac27a0ecSDave Kleikamp iput(inode); 961ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 962ac27a0ecSDave Kleikamp } 9631b961ac0SChristoph Hellwig 9641b961ac0SChristoph Hellwig return inode; 965ac27a0ecSDave Kleikamp } 9661b961ac0SChristoph Hellwig 9671b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 9681b961ac0SChristoph Hellwig int fh_len, int fh_type) 9691b961ac0SChristoph Hellwig { 9701b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 9711b961ac0SChristoph Hellwig ext4_nfs_get_inode); 9721b961ac0SChristoph Hellwig } 9731b961ac0SChristoph Hellwig 9741b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 9751b961ac0SChristoph Hellwig int fh_len, int fh_type) 9761b961ac0SChristoph Hellwig { 9771b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 9781b961ac0SChristoph Hellwig ext4_nfs_get_inode); 979ac27a0ecSDave Kleikamp } 980ac27a0ecSDave Kleikamp 981c39a7f84SToshiyuki Okajima /* 982c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 983c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 984c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 985c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 986c39a7f84SToshiyuki Okajima */ 9870b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 9880b8e58a1SAndreas Dilger gfp_t wait) 989c39a7f84SToshiyuki Okajima { 990c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 991c39a7f84SToshiyuki Okajima 992c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 993c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 994c39a7f84SToshiyuki Okajima return 0; 995c39a7f84SToshiyuki Okajima if (journal) 996c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 997c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 998c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 999c39a7f84SToshiyuki Okajima } 1000c39a7f84SToshiyuki Okajima 1001ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1002ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1003ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1004ac27a0ecSDave Kleikamp 1005617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1006617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1007617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1008617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1009617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 10106f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 10116f28e087SJan Kara char *path, int remount); 1012617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1013617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1014ac27a0ecSDave Kleikamp size_t len, loff_t off); 1015617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1016ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1017ac27a0ecSDave Kleikamp 101861e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 1019edf72453SJan Kara .initialize = dquot_initialize, 1020edf72453SJan Kara .drop = dquot_drop, 1021ac27a0ecSDave Kleikamp .alloc_space = dquot_alloc_space, 102260e58e0fSMingming Cao .reserve_space = dquot_reserve_space, 102360e58e0fSMingming Cao .claim_space = dquot_claim_space, 102460e58e0fSMingming Cao .release_rsv = dquot_release_reserved_space, 1025a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 102660e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1027a9e7f447SDmitry Monakhov #endif 1028ac27a0ecSDave Kleikamp .alloc_inode = dquot_alloc_inode, 1029ac27a0ecSDave Kleikamp .free_space = dquot_free_space, 1030ac27a0ecSDave Kleikamp .free_inode = dquot_free_inode, 1031ac27a0ecSDave Kleikamp .transfer = dquot_transfer, 1032617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1033617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1034617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1035617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1036a5b5ee32SJan Kara .write_info = ext4_write_info, 1037a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1038a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1039ac27a0ecSDave Kleikamp }; 1040ac27a0ecSDave Kleikamp 10410d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1042617ba13bSMingming Cao .quota_on = ext4_quota_on, 1043ac27a0ecSDave Kleikamp .quota_off = vfs_quota_off, 1044ac27a0ecSDave Kleikamp .quota_sync = vfs_quota_sync, 1045ac27a0ecSDave Kleikamp .get_info = vfs_get_dqinfo, 1046ac27a0ecSDave Kleikamp .set_info = vfs_set_dqinfo, 1047ac27a0ecSDave Kleikamp .get_dqblk = vfs_get_dqblk, 1048ac27a0ecSDave Kleikamp .set_dqblk = vfs_set_dqblk 1049ac27a0ecSDave Kleikamp }; 1050ac27a0ecSDave Kleikamp #endif 1051ac27a0ecSDave Kleikamp 1052ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1053617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1054617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1055617ba13bSMingming Cao .write_inode = ext4_write_inode, 1056617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 1057617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 1058617ba13bSMingming Cao .put_super = ext4_put_super, 1059617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1060c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1061c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1062617ba13bSMingming Cao .statfs = ext4_statfs, 1063617ba13bSMingming Cao .remount_fs = ext4_remount, 1064617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 1065617ba13bSMingming Cao .show_options = ext4_show_options, 1066ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1067617ba13bSMingming Cao .quota_read = ext4_quota_read, 1068617ba13bSMingming Cao .quota_write = ext4_quota_write, 1069ac27a0ecSDave Kleikamp #endif 1070c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1071ac27a0ecSDave Kleikamp }; 1072ac27a0ecSDave Kleikamp 10739ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 10749ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 10759ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 10769ca92389STheodore Ts'o .write_inode = ext4_write_inode, 10779ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 10789ca92389STheodore Ts'o .delete_inode = ext4_delete_inode, 10799ca92389STheodore Ts'o .write_super = ext4_write_super, 10809ca92389STheodore Ts'o .put_super = ext4_put_super, 10819ca92389STheodore Ts'o .statfs = ext4_statfs, 10829ca92389STheodore Ts'o .remount_fs = ext4_remount, 10839ca92389STheodore Ts'o .clear_inode = ext4_clear_inode, 10849ca92389STheodore Ts'o .show_options = ext4_show_options, 10859ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 10869ca92389STheodore Ts'o .quota_read = ext4_quota_read, 10879ca92389STheodore Ts'o .quota_write = ext4_quota_write, 10889ca92389STheodore Ts'o #endif 10899ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 10909ca92389STheodore Ts'o }; 10919ca92389STheodore Ts'o 109239655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 10931b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 10941b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1095617ba13bSMingming Cao .get_parent = ext4_get_parent, 1096ac27a0ecSDave Kleikamp }; 1097ac27a0ecSDave Kleikamp 1098ac27a0ecSDave Kleikamp enum { 1099ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1100ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 110101436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1102ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 110306705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 110430773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1105c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1106818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1107ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1108296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1109ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11105a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 11115a20bdfcSJan Kara Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, 11125a20bdfcSJan Kara Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, 111301436ef2STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, 11146fd058f7STheodore Ts'o Opt_block_validity, Opt_noblock_validity, 11155328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1116*744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 11175328e635SEric Sandeen Opt_discard, Opt_nodiscard, 1118ac27a0ecSDave Kleikamp }; 1119ac27a0ecSDave Kleikamp 1120a447c093SSteven Whitehouse static const match_table_t tokens = { 1121ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1122ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1123ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1124ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1125ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1126ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1127ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1128ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1129ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1130ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1131ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1132ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1133ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1134ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1135ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1136ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1137ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1138ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1139ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1140ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1141ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1142e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 1143ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1144ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1145ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 114630773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 114730773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1148ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1149ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1150818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1151818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1152ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1153ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1154ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1155ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 11565bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 11575bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1158ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1159ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1160ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1161ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1162ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1163ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 11645a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1165ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1166ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1167ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1168ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1169ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 117006705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 117106705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 117225ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1173c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1174ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 117564769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1176dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 11776fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 11786fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1179240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1180b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1181afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 118206705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 118306705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1184*744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1185*744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 11865328e635SEric Sandeen {Opt_discard, "discard"}, 11875328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1188f3f12faaSJosef Bacik {Opt_err, NULL}, 1189ac27a0ecSDave Kleikamp }; 1190ac27a0ecSDave Kleikamp 1191617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1192ac27a0ecSDave Kleikamp { 1193617ba13bSMingming Cao ext4_fsblk_t sb_block; 1194ac27a0ecSDave Kleikamp char *options = (char *) *data; 1195ac27a0ecSDave Kleikamp 1196ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1197ac27a0ecSDave Kleikamp return 1; /* Default location */ 11980b8e58a1SAndreas Dilger 1199ac27a0ecSDave Kleikamp options += 3; 12000b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1201ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1202ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12034776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1204ac27a0ecSDave Kleikamp (char *) *data); 1205ac27a0ecSDave Kleikamp return 1; 1206ac27a0ecSDave Kleikamp } 1207ac27a0ecSDave Kleikamp if (*options == ',') 1208ac27a0ecSDave Kleikamp options++; 1209ac27a0ecSDave Kleikamp *data = (void *) options; 12100b8e58a1SAndreas Dilger 1211ac27a0ecSDave Kleikamp return sb_block; 1212ac27a0ecSDave Kleikamp } 1213ac27a0ecSDave Kleikamp 1214b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1215437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1216437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1217b3881f74STheodore Ts'o 121856c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 121956c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 122056c50f11SDmitry Monakhov { 122156c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 122256c50f11SDmitry Monakhov char *qname; 122356c50f11SDmitry Monakhov 122456c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 122556c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 122656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 122756c50f11SDmitry Monakhov "Cannot change journaled " 122856c50f11SDmitry Monakhov "quota options when quota turned on"); 122956c50f11SDmitry Monakhov return 0; 123056c50f11SDmitry Monakhov } 123156c50f11SDmitry Monakhov qname = match_strdup(args); 123256c50f11SDmitry Monakhov if (!qname) { 123356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 123456c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 123556c50f11SDmitry Monakhov return 0; 123656c50f11SDmitry Monakhov } 123756c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 123856c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 123956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 124056c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 124156c50f11SDmitry Monakhov kfree(qname); 124256c50f11SDmitry Monakhov return 0; 124356c50f11SDmitry Monakhov } 124456c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 124556c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 124656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 124756c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 124856c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 124956c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 125056c50f11SDmitry Monakhov return 0; 125156c50f11SDmitry Monakhov } 125256c50f11SDmitry Monakhov set_opt(sbi->s_mount_opt, QUOTA); 125356c50f11SDmitry Monakhov return 1; 125456c50f11SDmitry Monakhov } 125556c50f11SDmitry Monakhov 125656c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 125756c50f11SDmitry Monakhov { 125856c50f11SDmitry Monakhov 125956c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 126056c50f11SDmitry Monakhov 126156c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 126256c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 126356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 126456c50f11SDmitry Monakhov " when quota turned on"); 126556c50f11SDmitry Monakhov return 0; 126656c50f11SDmitry Monakhov } 126756c50f11SDmitry Monakhov /* 126856c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 126956c50f11SDmitry Monakhov * to be correct 127056c50f11SDmitry Monakhov */ 127156c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 127256c50f11SDmitry Monakhov return 1; 127356c50f11SDmitry Monakhov } 127456c50f11SDmitry Monakhov #endif 127556c50f11SDmitry Monakhov 1276ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1277c3191067STheodore Ts'o unsigned long *journal_devnum, 1278b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1279617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1280ac27a0ecSDave Kleikamp { 1281617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1282ac27a0ecSDave Kleikamp char *p; 1283ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1284ac27a0ecSDave Kleikamp int data_opt = 0; 1285ac27a0ecSDave Kleikamp int option; 1286ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 128756c50f11SDmitry Monakhov int qfmt; 1288ac27a0ecSDave Kleikamp #endif 1289ac27a0ecSDave Kleikamp 1290ac27a0ecSDave Kleikamp if (!options) 1291ac27a0ecSDave Kleikamp return 1; 1292ac27a0ecSDave Kleikamp 1293ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1294ac27a0ecSDave Kleikamp int token; 1295ac27a0ecSDave Kleikamp if (!*p) 1296ac27a0ecSDave Kleikamp continue; 1297ac27a0ecSDave Kleikamp 129815121c18SEric Sandeen /* 129915121c18SEric Sandeen * Initialize args struct so we know whether arg was 130015121c18SEric Sandeen * found; some options take optional arguments. 130115121c18SEric Sandeen */ 130215121c18SEric Sandeen args[0].to = args[0].from = 0; 1303ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1304ac27a0ecSDave Kleikamp switch (token) { 1305ac27a0ecSDave Kleikamp case Opt_bsd_df: 1306437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1307ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, MINIX_DF); 1308ac27a0ecSDave Kleikamp break; 1309ac27a0ecSDave Kleikamp case Opt_minix_df: 1310437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1311ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, MINIX_DF); 1312437ca0fdSDmitry Monakhov 1313ac27a0ecSDave Kleikamp break; 1314ac27a0ecSDave Kleikamp case Opt_grpid: 1315437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1316ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1317437ca0fdSDmitry Monakhov 1318ac27a0ecSDave Kleikamp break; 1319ac27a0ecSDave Kleikamp case Opt_nogrpid: 1320437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1321ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPID); 1322437ca0fdSDmitry Monakhov 1323ac27a0ecSDave Kleikamp break; 1324ac27a0ecSDave Kleikamp case Opt_resuid: 1325ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1326ac27a0ecSDave Kleikamp return 0; 1327ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1328ac27a0ecSDave Kleikamp break; 1329ac27a0ecSDave Kleikamp case Opt_resgid: 1330ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1331ac27a0ecSDave Kleikamp return 0; 1332ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1333ac27a0ecSDave Kleikamp break; 1334ac27a0ecSDave Kleikamp case Opt_sb: 1335ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1336ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1337ac27a0ecSDave Kleikamp break; 1338ac27a0ecSDave Kleikamp case Opt_err_panic: 1339ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1340ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1341ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1342ac27a0ecSDave Kleikamp break; 1343ac27a0ecSDave Kleikamp case Opt_err_ro: 1344ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1345ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1346ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1347ac27a0ecSDave Kleikamp break; 1348ac27a0ecSDave Kleikamp case Opt_err_cont: 1349ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1350ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1351ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_CONT); 1352ac27a0ecSDave Kleikamp break; 1353ac27a0ecSDave Kleikamp case Opt_nouid32: 1354ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 1355ac27a0ecSDave Kleikamp break; 1356ac27a0ecSDave Kleikamp case Opt_debug: 1357ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1358ac27a0ecSDave Kleikamp break; 1359ac27a0ecSDave Kleikamp case Opt_oldalloc: 1360ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, OLDALLOC); 1361ac27a0ecSDave Kleikamp break; 1362ac27a0ecSDave Kleikamp case Opt_orlov: 1363ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, OLDALLOC); 1364ac27a0ecSDave Kleikamp break; 136503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1366ac27a0ecSDave Kleikamp case Opt_user_xattr: 1367ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 1368ac27a0ecSDave Kleikamp break; 1369ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1370ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, XATTR_USER); 1371ac27a0ecSDave Kleikamp break; 1372ac27a0ecSDave Kleikamp #else 1373ac27a0ecSDave Kleikamp case Opt_user_xattr: 1374ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1375b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1376ac27a0ecSDave Kleikamp break; 1377ac27a0ecSDave Kleikamp #endif 137803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1379ac27a0ecSDave Kleikamp case Opt_acl: 1380ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1381ac27a0ecSDave Kleikamp break; 1382ac27a0ecSDave Kleikamp case Opt_noacl: 1383ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1384ac27a0ecSDave Kleikamp break; 1385ac27a0ecSDave Kleikamp #else 1386ac27a0ecSDave Kleikamp case Opt_acl: 1387ac27a0ecSDave Kleikamp case Opt_noacl: 1388b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1389ac27a0ecSDave Kleikamp break; 1390ac27a0ecSDave Kleikamp #endif 1391ac27a0ecSDave Kleikamp case Opt_journal_update: 1392ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1393ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1394ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1395ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1396ac27a0ecSDave Kleikamp journal file. */ 1397ac27a0ecSDave Kleikamp if (is_remount) { 1398b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1399b31e1552SEric Sandeen "Cannot specify journal on remount"); 1400ac27a0ecSDave Kleikamp return 0; 1401ac27a0ecSDave Kleikamp } 1402ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); 1403ac27a0ecSDave Kleikamp break; 1404ac27a0ecSDave Kleikamp case Opt_journal_dev: 1405ac27a0ecSDave Kleikamp if (is_remount) { 1406b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1407b31e1552SEric Sandeen "Cannot specify journal on remount"); 1408ac27a0ecSDave Kleikamp return 0; 1409ac27a0ecSDave Kleikamp } 1410ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1411ac27a0ecSDave Kleikamp return 0; 1412ac27a0ecSDave Kleikamp *journal_devnum = option; 1413ac27a0ecSDave Kleikamp break; 1414818d276cSGirish Shilamkar case Opt_journal_checksum: 1415d4da6c9cSLinus Torvalds set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1416d4da6c9cSLinus Torvalds break; 1417818d276cSGirish Shilamkar case Opt_journal_async_commit: 1418818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1419d4da6c9cSLinus Torvalds set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1420818d276cSGirish Shilamkar break; 1421ac27a0ecSDave Kleikamp case Opt_noload: 1422ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOLOAD); 1423ac27a0ecSDave Kleikamp break; 1424ac27a0ecSDave Kleikamp case Opt_commit: 1425ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1426ac27a0ecSDave Kleikamp return 0; 1427ac27a0ecSDave Kleikamp if (option < 0) 1428ac27a0ecSDave Kleikamp return 0; 1429ac27a0ecSDave Kleikamp if (option == 0) 1430cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1431ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1432ac27a0ecSDave Kleikamp break; 143330773840STheodore Ts'o case Opt_max_batch_time: 143430773840STheodore Ts'o if (match_int(&args[0], &option)) 143530773840STheodore Ts'o return 0; 143630773840STheodore Ts'o if (option < 0) 143730773840STheodore Ts'o return 0; 143830773840STheodore Ts'o if (option == 0) 143930773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 144030773840STheodore Ts'o sbi->s_max_batch_time = option; 144130773840STheodore Ts'o break; 144230773840STheodore Ts'o case Opt_min_batch_time: 144330773840STheodore Ts'o if (match_int(&args[0], &option)) 144430773840STheodore Ts'o return 0; 144530773840STheodore Ts'o if (option < 0) 144630773840STheodore Ts'o return 0; 144730773840STheodore Ts'o sbi->s_min_batch_time = option; 144830773840STheodore Ts'o break; 1449ac27a0ecSDave Kleikamp case Opt_data_journal: 1450617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1451ac27a0ecSDave Kleikamp goto datacheck; 1452ac27a0ecSDave Kleikamp case Opt_data_ordered: 1453617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1454ac27a0ecSDave Kleikamp goto datacheck; 1455ac27a0ecSDave Kleikamp case Opt_data_writeback: 1456617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1457ac27a0ecSDave Kleikamp datacheck: 1458ac27a0ecSDave Kleikamp if (is_remount) { 1459482a7425SDmitry Monakhov if (test_opt(sb, DATA_FLAGS) != data_opt) { 1460b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1461b31e1552SEric Sandeen "Cannot change data mode on remount"); 1462ac27a0ecSDave Kleikamp return 0; 1463ac27a0ecSDave Kleikamp } 1464ac27a0ecSDave Kleikamp } else { 1465482a7425SDmitry Monakhov clear_opt(sbi->s_mount_opt, DATA_FLAGS); 1466ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1467ac27a0ecSDave Kleikamp } 1468ac27a0ecSDave Kleikamp break; 14695bf5683aSHidehiro Kawai case Opt_data_err_abort: 14705bf5683aSHidehiro Kawai set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 14715bf5683aSHidehiro Kawai break; 14725bf5683aSHidehiro Kawai case Opt_data_err_ignore: 14735bf5683aSHidehiro Kawai clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 14745bf5683aSHidehiro Kawai break; 1475ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1476ac27a0ecSDave Kleikamp case Opt_usrjquota: 147756c50f11SDmitry Monakhov if (!set_qf_name(sb, USRQUOTA, &args[0])) 147856c50f11SDmitry Monakhov return 0; 147956c50f11SDmitry Monakhov break; 1480ac27a0ecSDave Kleikamp case Opt_grpjquota: 148156c50f11SDmitry Monakhov if (!set_qf_name(sb, GRPQUOTA, &args[0])) 1482ac27a0ecSDave Kleikamp return 0; 1483ac27a0ecSDave Kleikamp break; 1484ac27a0ecSDave Kleikamp case Opt_offusrjquota: 148556c50f11SDmitry Monakhov if (!clear_qf_name(sb, USRQUOTA)) 1486ac27a0ecSDave Kleikamp return 0; 1487ac27a0ecSDave Kleikamp break; 148856c50f11SDmitry Monakhov case Opt_offgrpjquota: 148956c50f11SDmitry Monakhov if (!clear_qf_name(sb, GRPQUOTA)) 149056c50f11SDmitry Monakhov return 0; 149156c50f11SDmitry Monakhov break; 149256c50f11SDmitry Monakhov 1493ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1494dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1495dfc5d03fSJan Kara goto set_qf_format; 1496ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1497dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 14985a20bdfcSJan Kara goto set_qf_format; 14995a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 15005a20bdfcSJan Kara qfmt = QFMT_VFS_V1; 1501dfc5d03fSJan Kara set_qf_format: 150217bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1503dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1504b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1505dfc5d03fSJan Kara "journaled quota options when " 1506b31e1552SEric Sandeen "quota turned on"); 1507dfc5d03fSJan Kara return 0; 1508dfc5d03fSJan Kara } 1509dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1510ac27a0ecSDave Kleikamp break; 1511ac27a0ecSDave Kleikamp case Opt_quota: 1512ac27a0ecSDave Kleikamp case Opt_usrquota: 1513ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1514ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1515ac27a0ecSDave Kleikamp break; 1516ac27a0ecSDave Kleikamp case Opt_grpquota: 1517ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1518ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1519ac27a0ecSDave Kleikamp break; 1520ac27a0ecSDave Kleikamp case Opt_noquota: 152117bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1522b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1523b31e1552SEric Sandeen "options when quota turned on"); 1524ac27a0ecSDave Kleikamp return 0; 1525ac27a0ecSDave Kleikamp } 1526ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1527ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1528ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1529ac27a0ecSDave Kleikamp break; 1530ac27a0ecSDave Kleikamp #else 1531ac27a0ecSDave Kleikamp case Opt_quota: 1532ac27a0ecSDave Kleikamp case Opt_usrquota: 1533ac27a0ecSDave Kleikamp case Opt_grpquota: 1534b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1535b31e1552SEric Sandeen "quota options not supported"); 1536cd59e7b9SJan Kara break; 1537ac27a0ecSDave Kleikamp case Opt_usrjquota: 1538ac27a0ecSDave Kleikamp case Opt_grpjquota: 1539ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1540ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1541ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1542ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 15435a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 1544b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1545b31e1552SEric Sandeen "journaled quota options not supported"); 1546ac27a0ecSDave Kleikamp break; 1547ac27a0ecSDave Kleikamp case Opt_noquota: 1548ac27a0ecSDave Kleikamp break; 1549ac27a0ecSDave Kleikamp #endif 1550ac27a0ecSDave Kleikamp case Opt_abort: 15514ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1552ac27a0ecSDave Kleikamp break; 155306705bffSTheodore Ts'o case Opt_nobarrier: 155406705bffSTheodore Ts'o clear_opt(sbi->s_mount_opt, BARRIER); 155506705bffSTheodore Ts'o break; 1556ac27a0ecSDave Kleikamp case Opt_barrier: 155715121c18SEric Sandeen if (args[0].from) { 155815121c18SEric Sandeen if (match_int(&args[0], &option)) 155915121c18SEric Sandeen return 0; 156015121c18SEric Sandeen } else 156115121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1562ac27a0ecSDave Kleikamp if (option) 1563ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1564ac27a0ecSDave Kleikamp else 1565ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1566ac27a0ecSDave Kleikamp break; 1567ac27a0ecSDave Kleikamp case Opt_ignore: 1568ac27a0ecSDave Kleikamp break; 1569ac27a0ecSDave Kleikamp case Opt_resize: 1570ac27a0ecSDave Kleikamp if (!is_remount) { 1571b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1572b31e1552SEric Sandeen "resize option only available " 1573b31e1552SEric Sandeen "for remount"); 1574ac27a0ecSDave Kleikamp return 0; 1575ac27a0ecSDave Kleikamp } 1576ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1577ac27a0ecSDave Kleikamp return 0; 1578ac27a0ecSDave Kleikamp *n_blocks_count = option; 1579ac27a0ecSDave Kleikamp break; 1580ac27a0ecSDave Kleikamp case Opt_nobh: 1581ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1582ac27a0ecSDave Kleikamp break; 1583ac27a0ecSDave Kleikamp case Opt_bh: 1584ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1585ac27a0ecSDave Kleikamp break; 158625ec56b5SJean Noel Cordenner case Opt_i_version: 158725ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 158825ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 158925ec56b5SJean Noel Cordenner break; 1590dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1591dd919b98SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 1592dd919b98SAneesh Kumar K.V break; 1593c9de560dSAlex Tomas case Opt_stripe: 1594c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1595c9de560dSAlex Tomas return 0; 1596c9de560dSAlex Tomas if (option < 0) 1597c9de560dSAlex Tomas return 0; 1598c9de560dSAlex Tomas sbi->s_stripe = option; 1599c9de560dSAlex Tomas break; 160064769240SAlex Tomas case Opt_delalloc: 160164769240SAlex Tomas set_opt(sbi->s_mount_opt, DELALLOC); 160264769240SAlex Tomas break; 16036fd058f7STheodore Ts'o case Opt_block_validity: 16046fd058f7STheodore Ts'o set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 16056fd058f7STheodore Ts'o break; 16066fd058f7STheodore Ts'o case Opt_noblock_validity: 16076fd058f7STheodore Ts'o clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 16086fd058f7STheodore Ts'o break; 1609240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1610240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1611240799cdSTheodore Ts'o return 0; 1612240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1613240799cdSTheodore Ts'o return 0; 1614f7c43950STheodore Ts'o if (!is_power_of_2(option)) { 1615b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1616b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1617b31e1552SEric Sandeen " must be a power of 2"); 16183197ebdbSTheodore Ts'o return 0; 16193197ebdbSTheodore Ts'o } 1620240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1621240799cdSTheodore Ts'o break; 1622b3881f74STheodore Ts'o case Opt_journal_ioprio: 1623b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1624b3881f74STheodore Ts'o return 0; 1625b3881f74STheodore Ts'o if (option < 0 || option > 7) 1626b3881f74STheodore Ts'o break; 1627b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1628b3881f74STheodore Ts'o option); 1629b3881f74STheodore Ts'o break; 163006705bffSTheodore Ts'o case Opt_noauto_da_alloc: 163106705bffSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 163206705bffSTheodore Ts'o break; 1633afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 163415121c18SEric Sandeen if (args[0].from) { 163515121c18SEric Sandeen if (match_int(&args[0], &option)) 163615121c18SEric Sandeen return 0; 163715121c18SEric Sandeen } else 163815121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1639afd4672dSTheodore Ts'o if (option) 1640afd4672dSTheodore Ts'o clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); 1641afd4672dSTheodore Ts'o else 1642afd4672dSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 1643afd4672dSTheodore Ts'o break; 16445328e635SEric Sandeen case Opt_discard: 16455328e635SEric Sandeen set_opt(sbi->s_mount_opt, DISCARD); 16465328e635SEric Sandeen break; 16475328e635SEric Sandeen case Opt_nodiscard: 16485328e635SEric Sandeen clear_opt(sbi->s_mount_opt, DISCARD); 16495328e635SEric Sandeen break; 1650*744692dcSJiaying Zhang case Opt_dioread_nolock: 1651*744692dcSJiaying Zhang set_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 1652*744692dcSJiaying Zhang break; 1653*744692dcSJiaying Zhang case Opt_dioread_lock: 1654*744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 1655*744692dcSJiaying Zhang break; 1656ac27a0ecSDave Kleikamp default: 1657b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1658b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1659b31e1552SEric Sandeen "or missing value", p); 1660ac27a0ecSDave Kleikamp return 0; 1661ac27a0ecSDave Kleikamp } 1662ac27a0ecSDave Kleikamp } 1663ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1664ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1665482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1666ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1667ac27a0ecSDave Kleikamp 1668482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1669ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1670ac27a0ecSDave Kleikamp 167156c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1672b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1673b31e1552SEric Sandeen "format mixing"); 1674ac27a0ecSDave Kleikamp return 0; 1675ac27a0ecSDave Kleikamp } 1676ac27a0ecSDave Kleikamp 1677ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1678b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1679b31e1552SEric Sandeen "not specified"); 1680ac27a0ecSDave Kleikamp return 0; 1681ac27a0ecSDave Kleikamp } 1682ac27a0ecSDave Kleikamp } else { 1683ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1684b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 16852c8be6b2SJan Kara "specified with no journaling " 1686b31e1552SEric Sandeen "enabled"); 1687ac27a0ecSDave Kleikamp return 0; 1688ac27a0ecSDave Kleikamp } 1689ac27a0ecSDave Kleikamp } 1690ac27a0ecSDave Kleikamp #endif 1691ac27a0ecSDave Kleikamp return 1; 1692ac27a0ecSDave Kleikamp } 1693ac27a0ecSDave Kleikamp 1694617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1695ac27a0ecSDave Kleikamp int read_only) 1696ac27a0ecSDave Kleikamp { 1697617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1698ac27a0ecSDave Kleikamp int res = 0; 1699ac27a0ecSDave Kleikamp 1700617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1701b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1702b31e1552SEric Sandeen "forcing read-only mode"); 1703ac27a0ecSDave Kleikamp res = MS_RDONLY; 1704ac27a0ecSDave Kleikamp } 1705ac27a0ecSDave Kleikamp if (read_only) 1706ac27a0ecSDave Kleikamp return res; 1707617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1708b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1709b31e1552SEric Sandeen "running e2fsck is recommended"); 1710617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1711b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1712b31e1552SEric Sandeen "warning: mounting fs with errors, " 1713b31e1552SEric Sandeen "running e2fsck is recommended"); 1714ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1715ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1716ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1717b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1718b31e1552SEric Sandeen "warning: maximal mount count reached, " 1719b31e1552SEric Sandeen "running e2fsck is recommended"); 1720ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1721ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1722ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1723b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1724b31e1552SEric Sandeen "warning: checktime reached, " 1725b31e1552SEric Sandeen "running e2fsck is recommended"); 17260390131bSFrank Mayhar if (!sbi->s_journal) 1727216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1728ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1729617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1730e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1731ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1732617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 17330390131bSFrank Mayhar if (sbi->s_journal) 1734617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1735ac27a0ecSDave Kleikamp 1736e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1737ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1738a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 17397f4520ccSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x]\n", 1740ac27a0ecSDave Kleikamp sb->s_blocksize, 1741ac27a0ecSDave Kleikamp sbi->s_groups_count, 1742617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1743617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1744ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1745ac27a0ecSDave Kleikamp 1746ac27a0ecSDave Kleikamp return res; 1747ac27a0ecSDave Kleikamp } 1748ac27a0ecSDave Kleikamp 1749772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1750772cb7c8SJose R. Santos { 1751772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1752772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1753772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1754772cb7c8SJose R. Santos ext4_group_t flex_group; 1755772cb7c8SJose R. Santos int groups_per_flex = 0; 1756c5ca7c76STheodore Ts'o size_t size; 1757772cb7c8SJose R. Santos int i; 1758772cb7c8SJose R. Santos 1759503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1760503358aeSTheodore Ts'o groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1761503358aeSTheodore Ts'o 1762503358aeSTheodore Ts'o if (groups_per_flex < 2) { 1763772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1764772cb7c8SJose R. Santos return 1; 1765772cb7c8SJose R. Santos } 1766772cb7c8SJose R. Santos 1767c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1768c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1769d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1770d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1771c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 1772c5ca7c76STheodore Ts'o sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); 1773c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 1774c5ca7c76STheodore Ts'o sbi->s_flex_groups = vmalloc(size); 1775c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) 1776c5ca7c76STheodore Ts'o memset(sbi->s_flex_groups, 0, size); 1777c5ca7c76STheodore Ts'o } 1778772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1779b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory for " 1780b31e1552SEric Sandeen "%u flex groups", flex_group_count); 1781772cb7c8SJose R. Santos goto failed; 1782772cb7c8SJose R. Santos } 1783772cb7c8SJose R. Santos 1784772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 178588b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1786772cb7c8SJose R. Santos 1787772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 17887ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 17897ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 17907ad9bb65STheodore Ts'o atomic_add(ext4_free_blks_count(sb, gdp), 17917ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_blocks); 17927ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 17937ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1794772cb7c8SJose R. Santos } 1795772cb7c8SJose R. Santos 1796772cb7c8SJose R. Santos return 1; 1797772cb7c8SJose R. Santos failed: 1798772cb7c8SJose R. Santos return 0; 1799772cb7c8SJose R. Santos } 1800772cb7c8SJose R. Santos 1801717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1802717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1803717d50e4SAndreas Dilger { 1804717d50e4SAndreas Dilger __u16 crc = 0; 1805717d50e4SAndreas Dilger 1806717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1807717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1808717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1809717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1810717d50e4SAndreas Dilger 1811717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1812717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1813717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1814717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1815717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1816717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1817717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1818717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1819717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1820717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1821717d50e4SAndreas Dilger offset); 1822717d50e4SAndreas Dilger } 1823717d50e4SAndreas Dilger 1824717d50e4SAndreas Dilger return cpu_to_le16(crc); 1825717d50e4SAndreas Dilger } 1826717d50e4SAndreas Dilger 1827717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1828717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1829717d50e4SAndreas Dilger { 1830717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1831717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1832717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1833717d50e4SAndreas Dilger return 0; 1834717d50e4SAndreas Dilger 1835717d50e4SAndreas Dilger return 1; 1836717d50e4SAndreas Dilger } 1837717d50e4SAndreas Dilger 1838ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1839617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1840ac27a0ecSDave Kleikamp { 1841617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1842617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1843617ba13bSMingming Cao ext4_fsblk_t last_block; 1844bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1845bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1846bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1847ce421581SJose R. Santos int flexbg_flag = 0; 1848fd2d4291SAvantika Mathur ext4_group_t i; 1849ac27a0ecSDave Kleikamp 1850ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1851ce421581SJose R. Santos flexbg_flag = 1; 1852ce421581SJose R. Santos 1853617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 1854ac27a0ecSDave Kleikamp 1855197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1856197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1857197cd65aSAkinobu Mita 1858ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1859bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1860ac27a0ecSDave Kleikamp else 1861ac27a0ecSDave Kleikamp last_block = first_block + 1862617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1863ac27a0ecSDave Kleikamp 18648fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 18652b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 1866b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1867a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 1868b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 1869ac27a0ecSDave Kleikamp return 0; 1870ac27a0ecSDave Kleikamp } 18718fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 18722b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 1873b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1874a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 1875b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 1876ac27a0ecSDave Kleikamp return 0; 1877ac27a0ecSDave Kleikamp } 18788fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1879bd81d8eeSLaurent Vivier if (inode_table < first_block || 18802b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 1881b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1882a9df9a49STheodore Ts'o "Inode table for group %u not in group " 1883b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 1884ac27a0ecSDave Kleikamp return 0; 1885ac27a0ecSDave Kleikamp } 1886955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 1887717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1888b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1889b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 1890fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1891fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 18927ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 1893955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1894717d50e4SAndreas Dilger return 0; 1895717d50e4SAndreas Dilger } 18967ee1ec4cSLi Zefan } 1897955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1898ce421581SJose R. Santos if (!flexbg_flag) 1899617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 1900ac27a0ecSDave Kleikamp } 1901ac27a0ecSDave Kleikamp 1902bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1903617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 1904ac27a0ecSDave Kleikamp return 1; 1905ac27a0ecSDave Kleikamp } 1906ac27a0ecSDave Kleikamp 1907617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1908ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1909ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1910ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1911ac27a0ecSDave Kleikamp * 1912ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1913ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1914ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1915ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1916ac27a0ecSDave Kleikamp * 1917ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1918ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1919ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1920617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1921ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1922ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1923ac27a0ecSDave Kleikamp */ 1924617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 1925617ba13bSMingming Cao struct ext4_super_block *es) 1926ac27a0ecSDave Kleikamp { 1927ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1928ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1929ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1930ac27a0ecSDave Kleikamp int i; 1931ac27a0ecSDave Kleikamp #endif 1932ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1933ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1934ac27a0ecSDave Kleikamp return; 1935ac27a0ecSDave Kleikamp } 1936ac27a0ecSDave Kleikamp 1937a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1938b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 1939b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 1940a8f48a95SEric Sandeen return; 1941a8f48a95SEric Sandeen } 1942a8f48a95SEric Sandeen 1943617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1944ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1945ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1946ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1947ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1948ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1949ac27a0ecSDave Kleikamp return; 1950ac27a0ecSDave Kleikamp } 1951ac27a0ecSDave Kleikamp 1952ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1953b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 1954ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 1955ac27a0ecSDave Kleikamp } 1956ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1957ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 1958ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 1959ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 1960ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1961617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 1962617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 1963ac27a0ecSDave Kleikamp if (ret < 0) 1964b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1965b31e1552SEric Sandeen "Cannot turn on journaled " 1966b31e1552SEric Sandeen "quota: error %d", ret); 1967ac27a0ecSDave Kleikamp } 1968ac27a0ecSDave Kleikamp } 1969ac27a0ecSDave Kleikamp #endif 1970ac27a0ecSDave Kleikamp 1971ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 1972ac27a0ecSDave Kleikamp struct inode *inode; 1973ac27a0ecSDave Kleikamp 197497bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 197597bd42b9SJosef Bacik if (IS_ERR(inode)) { 1976ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1977ac27a0ecSDave Kleikamp break; 1978ac27a0ecSDave Kleikamp } 1979ac27a0ecSDave Kleikamp 1980617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 1981a269eb18SJan Kara vfs_dq_init(inode); 1982ac27a0ecSDave Kleikamp if (inode->i_nlink) { 1983b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 1984b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 198546e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 1986e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 1987ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 1988617ba13bSMingming Cao ext4_truncate(inode); 1989ac27a0ecSDave Kleikamp nr_truncates++; 1990ac27a0ecSDave Kleikamp } else { 1991b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 1992b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 199346e665e9SHarvey Harrison __func__, inode->i_ino); 1994ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 1995ac27a0ecSDave Kleikamp inode->i_ino); 1996ac27a0ecSDave Kleikamp nr_orphans++; 1997ac27a0ecSDave Kleikamp } 1998ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 1999ac27a0ecSDave Kleikamp } 2000ac27a0ecSDave Kleikamp 2001ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2002ac27a0ecSDave Kleikamp 2003ac27a0ecSDave Kleikamp if (nr_orphans) 2004b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2005b31e1552SEric Sandeen PLURAL(nr_orphans)); 2006ac27a0ecSDave Kleikamp if (nr_truncates) 2007b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2008b31e1552SEric Sandeen PLURAL(nr_truncates)); 2009ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2010ac27a0ecSDave Kleikamp /* Turn quotas off */ 2011ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2012ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 20136f28e087SJan Kara vfs_quota_off(sb, i, 0); 2014ac27a0ecSDave Kleikamp } 2015ac27a0ecSDave Kleikamp #endif 2016ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2017ac27a0ecSDave Kleikamp } 20180b8e58a1SAndreas Dilger 2019cd2291a4SEric Sandeen /* 2020cd2291a4SEric Sandeen * Maximal extent format file size. 2021cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2022cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2023cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2024cd2291a4SEric Sandeen * so that won't be a limiting factor. 2025cd2291a4SEric Sandeen * 2026cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2027cd2291a4SEric Sandeen */ 2028f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2029cd2291a4SEric Sandeen { 2030cd2291a4SEric Sandeen loff_t res; 2031cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2032cd2291a4SEric Sandeen 2033cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2034f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2035cd2291a4SEric Sandeen /* 203690c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2037cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2038cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2039cd2291a4SEric Sandeen */ 2040cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2041cd2291a4SEric Sandeen 2042cd2291a4SEric Sandeen /* total blocks in file system block size */ 2043cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2044cd2291a4SEric Sandeen upper_limit <<= blkbits; 2045cd2291a4SEric Sandeen } 2046cd2291a4SEric Sandeen 2047cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 2048cd2291a4SEric Sandeen res = 1LL << 32; 2049cd2291a4SEric Sandeen res <<= blkbits; 2050cd2291a4SEric Sandeen res -= 1; 2051cd2291a4SEric Sandeen 2052cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2053cd2291a4SEric Sandeen if (res > upper_limit) 2054cd2291a4SEric Sandeen res = upper_limit; 2055cd2291a4SEric Sandeen 2056cd2291a4SEric Sandeen return res; 2057cd2291a4SEric Sandeen } 2058ac27a0ecSDave Kleikamp 2059ac27a0ecSDave Kleikamp /* 2060cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 20610fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 20620fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2063ac27a0ecSDave Kleikamp */ 2064f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2065ac27a0ecSDave Kleikamp { 2066617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 20670fc1b451SAneesh Kumar K.V int meta_blocks; 20680fc1b451SAneesh Kumar K.V loff_t upper_limit; 20690b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 20700b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 20710b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 20720b8e58a1SAndreas Dilger * 20730b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 20740b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 20750fc1b451SAneesh Kumar K.V */ 20760fc1b451SAneesh Kumar K.V 2077f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 20780fc1b451SAneesh Kumar K.V /* 207990c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 20800b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 20810b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 20820fc1b451SAneesh Kumar K.V */ 20830fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 20840fc1b451SAneesh Kumar K.V 20850fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 20860fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 20870fc1b451SAneesh Kumar K.V 20880fc1b451SAneesh Kumar K.V } else { 20898180a562SAneesh Kumar K.V /* 20908180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 20918180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 20928180a562SAneesh Kumar K.V * represent total number of blocks in 20938180a562SAneesh Kumar K.V * file system block size 20948180a562SAneesh Kumar K.V */ 20950fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 20960fc1b451SAneesh Kumar K.V 20970fc1b451SAneesh Kumar K.V } 20980fc1b451SAneesh Kumar K.V 20990fc1b451SAneesh Kumar K.V /* indirect blocks */ 21000fc1b451SAneesh Kumar K.V meta_blocks = 1; 21010fc1b451SAneesh Kumar K.V /* double indirect blocks */ 21020fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 21030fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 21040fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 21050fc1b451SAneesh Kumar K.V 21060fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 21070fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2108ac27a0ecSDave Kleikamp 2109ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2110ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2111ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2112ac27a0ecSDave Kleikamp res <<= bits; 2113ac27a0ecSDave Kleikamp if (res > upper_limit) 2114ac27a0ecSDave Kleikamp res = upper_limit; 21150fc1b451SAneesh Kumar K.V 21160fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 21170fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 21180fc1b451SAneesh Kumar K.V 2119ac27a0ecSDave Kleikamp return res; 2120ac27a0ecSDave Kleikamp } 2121ac27a0ecSDave Kleikamp 2122617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 212370bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2124ac27a0ecSDave Kleikamp { 2125617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2126fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2127ac27a0ecSDave Kleikamp int has_super = 0; 2128ac27a0ecSDave Kleikamp 2129ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2130ac27a0ecSDave Kleikamp 2131617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2132ac27a0ecSDave Kleikamp nr < first_meta_bg) 213370bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2134ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2135617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2136ac27a0ecSDave Kleikamp has_super = 1; 21370b8e58a1SAndreas Dilger 2138617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2139ac27a0ecSDave Kleikamp } 2140ac27a0ecSDave Kleikamp 2141c9de560dSAlex Tomas /** 2142c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2143c9de560dSAlex Tomas * @sbi: In memory super block info 2144c9de560dSAlex Tomas * 2145c9de560dSAlex Tomas * If we have specified it via mount option, then 2146c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2147c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2148c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2149c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2150c9de560dSAlex Tomas * 2151c9de560dSAlex Tomas */ 2152c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2153c9de560dSAlex Tomas { 2154c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2155c9de560dSAlex Tomas unsigned long stripe_width = 2156c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 2157c9de560dSAlex Tomas 2158c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 2159c9de560dSAlex Tomas return sbi->s_stripe; 2160c9de560dSAlex Tomas 2161c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 2162c9de560dSAlex Tomas return stripe_width; 2163c9de560dSAlex Tomas 2164c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 2165c9de560dSAlex Tomas return stride; 2166c9de560dSAlex Tomas 2167c9de560dSAlex Tomas return 0; 2168c9de560dSAlex Tomas } 2169ac27a0ecSDave Kleikamp 21703197ebdbSTheodore Ts'o /* sysfs supprt */ 21713197ebdbSTheodore Ts'o 21723197ebdbSTheodore Ts'o struct ext4_attr { 21733197ebdbSTheodore Ts'o struct attribute attr; 21743197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 21753197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 21763197ebdbSTheodore Ts'o const char *, size_t); 21773197ebdbSTheodore Ts'o int offset; 21783197ebdbSTheodore Ts'o }; 21793197ebdbSTheodore Ts'o 21803197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 21813197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 21823197ebdbSTheodore Ts'o { 21833197ebdbSTheodore Ts'o char *endp; 21843197ebdbSTheodore Ts'o 2185e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2186e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 21873197ebdbSTheodore Ts'o if (*endp || *value > max) 21883197ebdbSTheodore Ts'o return -EINVAL; 21893197ebdbSTheodore Ts'o 21903197ebdbSTheodore Ts'o return 0; 21913197ebdbSTheodore Ts'o } 21923197ebdbSTheodore Ts'o 21933197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 21943197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 21953197ebdbSTheodore Ts'o char *buf) 21963197ebdbSTheodore Ts'o { 21973197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 21983197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 21993197ebdbSTheodore Ts'o } 22003197ebdbSTheodore Ts'o 22013197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 22023197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 22033197ebdbSTheodore Ts'o { 22043197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 22053197ebdbSTheodore Ts'o 22063197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 22073197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 22083197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 22093197ebdbSTheodore Ts'o } 22103197ebdbSTheodore Ts'o 22113197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 22123197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 22133197ebdbSTheodore Ts'o { 22143197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 22153197ebdbSTheodore Ts'o 22163197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2217a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 22183197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2219a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 22203197ebdbSTheodore Ts'o } 22213197ebdbSTheodore Ts'o 22223197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 22233197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 22243197ebdbSTheodore Ts'o const char *buf, size_t count) 22253197ebdbSTheodore Ts'o { 22263197ebdbSTheodore Ts'o unsigned long t; 22273197ebdbSTheodore Ts'o 22283197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 22293197ebdbSTheodore Ts'o return -EINVAL; 22303197ebdbSTheodore Ts'o 2231f7c43950STheodore Ts'o if (!is_power_of_2(t)) 22323197ebdbSTheodore Ts'o return -EINVAL; 22333197ebdbSTheodore Ts'o 22343197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 22353197ebdbSTheodore Ts'o return count; 22363197ebdbSTheodore Ts'o } 22373197ebdbSTheodore Ts'o 22383197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 22393197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 22403197ebdbSTheodore Ts'o { 22413197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 22423197ebdbSTheodore Ts'o 22433197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 22443197ebdbSTheodore Ts'o } 22453197ebdbSTheodore Ts'o 22463197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 22473197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 22483197ebdbSTheodore Ts'o const char *buf, size_t count) 22493197ebdbSTheodore Ts'o { 22503197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 22513197ebdbSTheodore Ts'o unsigned long t; 22523197ebdbSTheodore Ts'o 22533197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 22543197ebdbSTheodore Ts'o return -EINVAL; 22553197ebdbSTheodore Ts'o *ui = t; 22563197ebdbSTheodore Ts'o return count; 22573197ebdbSTheodore Ts'o } 22583197ebdbSTheodore Ts'o 22593197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 22603197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 22613197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 22623197ebdbSTheodore Ts'o .show = _show, \ 22633197ebdbSTheodore Ts'o .store = _store, \ 22643197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 22653197ebdbSTheodore Ts'o } 22663197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 22673197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 22683197ebdbSTheodore Ts'o 22693197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 22703197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 22713197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 22723197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 22733197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 22743197ebdbSTheodore Ts'o 22753197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 22763197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 22773197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 22783197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 22793197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 228011013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 22813197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 22823197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 22833197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 22843197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 22853197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 22863197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 228755138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 22883197ebdbSTheodore Ts'o 22893197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 22903197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 22913197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 22923197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 22933197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 229411013911SAndreas Dilger ATTR_LIST(inode_goal), 22953197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 22963197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 22973197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 22983197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 22993197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 23003197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 230155138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 23023197ebdbSTheodore Ts'o NULL, 23033197ebdbSTheodore Ts'o }; 23043197ebdbSTheodore Ts'o 23053197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 23063197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 23073197ebdbSTheodore Ts'o { 23083197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 23093197ebdbSTheodore Ts'o s_kobj); 23103197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 23113197ebdbSTheodore Ts'o 23123197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 23133197ebdbSTheodore Ts'o } 23143197ebdbSTheodore Ts'o 23153197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 23163197ebdbSTheodore Ts'o struct attribute *attr, 23173197ebdbSTheodore Ts'o const char *buf, size_t len) 23183197ebdbSTheodore Ts'o { 23193197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 23203197ebdbSTheodore Ts'o s_kobj); 23213197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 23223197ebdbSTheodore Ts'o 23233197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 23243197ebdbSTheodore Ts'o } 23253197ebdbSTheodore Ts'o 23263197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 23273197ebdbSTheodore Ts'o { 23283197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 23293197ebdbSTheodore Ts'o s_kobj); 23303197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 23313197ebdbSTheodore Ts'o } 23323197ebdbSTheodore Ts'o 23333197ebdbSTheodore Ts'o 23343197ebdbSTheodore Ts'o static struct sysfs_ops ext4_attr_ops = { 23353197ebdbSTheodore Ts'o .show = ext4_attr_show, 23363197ebdbSTheodore Ts'o .store = ext4_attr_store, 23373197ebdbSTheodore Ts'o }; 23383197ebdbSTheodore Ts'o 23393197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 23403197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 23413197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 23423197ebdbSTheodore Ts'o .release = ext4_sb_release, 23433197ebdbSTheodore Ts'o }; 23443197ebdbSTheodore Ts'o 2345a13fb1a4SEric Sandeen /* 2346a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2347a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2348a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2349a13fb1a4SEric Sandeen * 0 if it cannot be. 2350a13fb1a4SEric Sandeen */ 2351a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2352a13fb1a4SEric Sandeen { 2353a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2354a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2355a13fb1a4SEric Sandeen "Couldn't mount because of " 2356a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2357a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2358a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2359a13fb1a4SEric Sandeen return 0; 2360a13fb1a4SEric Sandeen } 2361a13fb1a4SEric Sandeen 2362a13fb1a4SEric Sandeen if (readonly) 2363a13fb1a4SEric Sandeen return 1; 2364a13fb1a4SEric Sandeen 2365a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2366a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2367a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2368a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2369a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2370a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2371a13fb1a4SEric Sandeen return 0; 2372a13fb1a4SEric Sandeen } 2373a13fb1a4SEric Sandeen /* 2374a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2375a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2376a13fb1a4SEric Sandeen */ 2377a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2378a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2379a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2380a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2381a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2382a13fb1a4SEric Sandeen return 0; 2383a13fb1a4SEric Sandeen } 2384a13fb1a4SEric Sandeen } 2385a13fb1a4SEric Sandeen return 1; 2386a13fb1a4SEric Sandeen } 2387a13fb1a4SEric Sandeen 2388617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 23897477827fSAneesh Kumar K.V __releases(kernel_lock) 23907477827fSAneesh Kumar K.V __acquires(kernel_lock) 2391ac27a0ecSDave Kleikamp { 2392ac27a0ecSDave Kleikamp struct buffer_head *bh; 2393617ba13bSMingming Cao struct ext4_super_block *es = NULL; 2394617ba13bSMingming Cao struct ext4_sb_info *sbi; 2395617ba13bSMingming Cao ext4_fsblk_t block; 2396617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 239770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 2398ac27a0ecSDave Kleikamp unsigned long offset = 0; 2399ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 2400ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 2401ac27a0ecSDave Kleikamp struct inode *root; 24029f6200bbSTheodore Ts'o char *cp; 24030390131bSFrank Mayhar const char *descr; 24041d1fe1eeSDavid Howells int ret = -EINVAL; 2405ac27a0ecSDave Kleikamp int blocksize; 24064ec11028STheodore Ts'o unsigned int db_count; 24074ec11028STheodore Ts'o unsigned int i; 2408f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 2409bd81d8eeSLaurent Vivier __u64 blocks_count; 2410833f4077SPeter Zijlstra int err; 2411b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 2412ac27a0ecSDave Kleikamp 2413ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 2414ac27a0ecSDave Kleikamp if (!sbi) 2415ac27a0ecSDave Kleikamp return -ENOMEM; 2416705895b6SPekka Enberg 2417705895b6SPekka Enberg sbi->s_blockgroup_lock = 2418705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 2419705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 2420705895b6SPekka Enberg kfree(sbi); 2421705895b6SPekka Enberg return -ENOMEM; 2422705895b6SPekka Enberg } 2423ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 2424ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 2425617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 2426617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 2427240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 2428d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 2429afc32f7eSTheodore Ts'o sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, 2430afc32f7eSTheodore Ts'o sectors[1]); 2431ac27a0ecSDave Kleikamp 2432ac27a0ecSDave Kleikamp unlock_kernel(); 2433ac27a0ecSDave Kleikamp 24349f6200bbSTheodore Ts'o /* Cleanup superblock name */ 24359f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 24369f6200bbSTheodore Ts'o *cp = '!'; 24379f6200bbSTheodore Ts'o 2438617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 2439ac27a0ecSDave Kleikamp if (!blocksize) { 2440b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 2441ac27a0ecSDave Kleikamp goto out_fail; 2442ac27a0ecSDave Kleikamp } 2443ac27a0ecSDave Kleikamp 2444ac27a0ecSDave Kleikamp /* 2445617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 2446ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 2447ac27a0ecSDave Kleikamp */ 2448617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 244970bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 245070bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 2451ac27a0ecSDave Kleikamp } else { 245270bbb3e0SAndrew Morton logical_sb_block = sb_block; 2453ac27a0ecSDave Kleikamp } 2454ac27a0ecSDave Kleikamp 245570bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 2456b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 2457ac27a0ecSDave Kleikamp goto out_fail; 2458ac27a0ecSDave Kleikamp } 2459ac27a0ecSDave Kleikamp /* 2460ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 2461617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 2462ac27a0ecSDave Kleikamp */ 2463617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2464ac27a0ecSDave Kleikamp sbi->s_es = es; 2465ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 2466617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 2467617ba13bSMingming Cao goto cantfind_ext4; 2468afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 2469ac27a0ecSDave Kleikamp 2470ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 2471ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 2472617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 2473ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 2474437ca0fdSDmitry Monakhov if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { 2475437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", 2476437ca0fdSDmitry Monakhov "2.6.38"); 2477ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 2478437ca0fdSDmitry Monakhov } 2479617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 2480ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 248103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 2482617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 2483ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 24842e7842b8SHugh Dickins #endif 248503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 2486617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 2487ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 24882e7842b8SHugh Dickins #endif 2489617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 2490482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2491617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 2492482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, ORDERED_DATA); 2493617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 2494482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 2495ac27a0ecSDave Kleikamp 2496617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 2497ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 2498bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 2499ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 2500bb4f397aSAneesh Kumar K.V else 2501bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 2502ac27a0ecSDave Kleikamp 2503ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 2504ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 250530773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 250630773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 250730773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 2508ac27a0ecSDave Kleikamp 2509571640caSEric Sandeen set_opt(sbi->s_mount_opt, BARRIER); 2510ac27a0ecSDave Kleikamp 25111e2462f9SMingming Cao /* 2512dd919b98SAneesh Kumar K.V * enable delayed allocation by default 2513dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 2514dd919b98SAneesh Kumar K.V */ 2515dd919b98SAneesh Kumar K.V set_opt(sbi->s_mount_opt, DELALLOC); 2516dd919b98SAneesh Kumar K.V 2517b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 2518b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 2519ac27a0ecSDave Kleikamp goto failed_mount; 2520ac27a0ecSDave Kleikamp 2521ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2522482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 2523ac27a0ecSDave Kleikamp 2524617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 2525617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 2526617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 2527617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 2528b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2529b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 2530b31e1552SEric Sandeen "running e2fsck is recommended"); 2531469108ffSTheodore Tso 2532469108ffSTheodore Tso /* 2533ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 2534ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 2535ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 2536ac27a0ecSDave Kleikamp */ 2537a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 2538ac27a0ecSDave Kleikamp goto failed_mount; 2539a13fb1a4SEric Sandeen 2540ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 2541ac27a0ecSDave Kleikamp 2542617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 2543617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 2544b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2545b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 2546ac27a0ecSDave Kleikamp goto failed_mount; 2547ac27a0ecSDave Kleikamp } 2548ac27a0ecSDave Kleikamp 2549ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 2550ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 2551ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 2552b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 2553ce40733cSAneesh Kumar K.V blocksize); 2554ac27a0ecSDave Kleikamp goto failed_mount; 2555ac27a0ecSDave Kleikamp } 2556ac27a0ecSDave Kleikamp 2557ac27a0ecSDave Kleikamp brelse(bh); 255870bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 255970bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 256070bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 2561ac27a0ecSDave Kleikamp if (!bh) { 2562b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2563b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 2564ac27a0ecSDave Kleikamp goto failed_mount; 2565ac27a0ecSDave Kleikamp } 2566617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 2567ac27a0ecSDave Kleikamp sbi->s_es = es; 2568617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 2569b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2570b31e1552SEric Sandeen "Magic mismatch, very weird!"); 2571ac27a0ecSDave Kleikamp goto failed_mount; 2572ac27a0ecSDave Kleikamp } 2573ac27a0ecSDave Kleikamp } 2574ac27a0ecSDave Kleikamp 2575a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2576a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 2577f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 2578f287a1a5STheodore Ts'o has_huge_files); 2579f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 2580ac27a0ecSDave Kleikamp 2581617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 2582617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 2583617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 2584ac27a0ecSDave Kleikamp } else { 2585ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2586ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2587617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 25881330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2589ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2590b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2591b31e1552SEric Sandeen "unsupported inode size: %d", 2592ac27a0ecSDave Kleikamp sbi->s_inode_size); 2593ac27a0ecSDave Kleikamp goto failed_mount; 2594ac27a0ecSDave Kleikamp } 2595ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2596ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2597ac27a0ecSDave Kleikamp } 25980b8e58a1SAndreas Dilger 25990d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 26000d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 26018fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 26020d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2603d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 2604b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2605b31e1552SEric Sandeen "unsupported descriptor size %lu", 26060d1ee42fSAlexandre Ratchov sbi->s_desc_size); 26070d1ee42fSAlexandre Ratchov goto failed_mount; 26080d1ee42fSAlexandre Ratchov } 26090d1ee42fSAlexandre Ratchov } else 26100d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 26110b8e58a1SAndreas Dilger 2612ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2613ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2614b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2615617ba13bSMingming Cao goto cantfind_ext4; 26160b8e58a1SAndreas Dilger 2617617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2618ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2619617ba13bSMingming Cao goto cantfind_ext4; 2620ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2621ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 26220d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2623ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2624ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2625e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2626e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 26270b8e58a1SAndreas Dilger 2628ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 2629ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2630ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2631f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 2632f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 2633f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2634f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 2635f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 2636f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 2637f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2638f99b2589STheodore Ts'o #else 2639f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 2640f99b2589STheodore Ts'o #endif 2641f99b2589STheodore Ts'o sb->s_dirt = 1; 2642f99b2589STheodore Ts'o } 2643ac27a0ecSDave Kleikamp 2644ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2645b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2646b31e1552SEric Sandeen "#blocks per group too big: %lu", 2647ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2648ac27a0ecSDave Kleikamp goto failed_mount; 2649ac27a0ecSDave Kleikamp } 2650ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2651b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2652b31e1552SEric Sandeen "#inodes per group too big: %lu", 2653ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2654ac27a0ecSDave Kleikamp goto failed_mount; 2655ac27a0ecSDave Kleikamp } 2656ac27a0ecSDave Kleikamp 2657bf43d84bSEric Sandeen /* 2658bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 2659bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 2660bf43d84bSEric Sandeen */ 2661bf43d84bSEric Sandeen if ((ext4_blocks_count(es) > 2662bf43d84bSEric Sandeen (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) || 2663bf43d84bSEric Sandeen (ext4_blocks_count(es) > 2664bf43d84bSEric Sandeen (pgoff_t)(~0ULL) >> (PAGE_CACHE_SHIFT - sb->s_blocksize_bits))) { 2665b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 2666bf43d84bSEric Sandeen " too large to mount safely on this system"); 2667ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 266890c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 2669bf43d84bSEric Sandeen ret = -EFBIG; 2670ac27a0ecSDave Kleikamp goto failed_mount; 2671ac27a0ecSDave Kleikamp } 2672ac27a0ecSDave Kleikamp 2673617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2674617ba13bSMingming Cao goto cantfind_ext4; 2675e7c95593SEric Sandeen 26760f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 26770f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 26780f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 2679b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 2680b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 26810f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 26820f2ddca6SFrom: Thiemo Nagel goto failed_mount; 26830f2ddca6SFrom: Thiemo Nagel } 26840f2ddca6SFrom: Thiemo Nagel 26854ec11028STheodore Ts'o /* 26864ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 26874ec11028STheodore Ts'o * of the filesystem. 26884ec11028STheodore Ts'o */ 26894ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 2690b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 2691b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 2692e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 26934ec11028STheodore Ts'o ext4_blocks_count(es)); 2694e7c95593SEric Sandeen goto failed_mount; 2695e7c95593SEric Sandeen } 2696bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2697bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2698bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2699bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 27004ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 2701b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 27024ec11028STheodore Ts'o "(block count %llu, first data block %u, " 2703b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 27044ec11028STheodore Ts'o ext4_blocks_count(es), 27054ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 27064ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 27074ec11028STheodore Ts'o goto failed_mount; 27084ec11028STheodore Ts'o } 2709bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2710fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 2711fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 2712617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2713617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2714ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 2715ac27a0ecSDave Kleikamp GFP_KERNEL); 2716ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2717b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 2718ac27a0ecSDave Kleikamp goto failed_mount; 2719ac27a0ecSDave Kleikamp } 2720ac27a0ecSDave Kleikamp 27213244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 27229f6200bbSTheodore Ts'o if (ext4_proc_root) 27239f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 27243244fcb1SAlexander Beregalov #endif 2725240799cdSTheodore Ts'o 2726705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 2727ac27a0ecSDave Kleikamp 2728ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 272970bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2730ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2731ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2732b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2733b31e1552SEric Sandeen "can't read group descriptor %d", i); 2734ac27a0ecSDave Kleikamp db_count = i; 2735ac27a0ecSDave Kleikamp goto failed_mount2; 2736ac27a0ecSDave Kleikamp } 2737ac27a0ecSDave Kleikamp } 2738617ba13bSMingming Cao if (!ext4_check_descriptors(sb)) { 2739b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 2740ac27a0ecSDave Kleikamp goto failed_mount2; 2741ac27a0ecSDave Kleikamp } 2742772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2743772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 2744b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2745b31e1552SEric Sandeen "unable to initialize " 2746b31e1552SEric Sandeen "flex_bg meta info!"); 2747772cb7c8SJose R. Santos goto failed_mount2; 2748772cb7c8SJose R. Santos } 2749772cb7c8SJose R. Santos 2750ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2751ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2752ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2753ac27a0ecSDave Kleikamp 2754833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeblocks_counter, 2755617ba13bSMingming Cao ext4_count_free_blocks(sb)); 2756833f4077SPeter Zijlstra if (!err) { 2757833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeinodes_counter, 2758617ba13bSMingming Cao ext4_count_free_inodes(sb)); 2759833f4077SPeter Zijlstra } 2760833f4077SPeter Zijlstra if (!err) { 2761833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_dirs_counter, 2762617ba13bSMingming Cao ext4_count_dirs(sb)); 2763833f4077SPeter Zijlstra } 27646bc6e63fSAneesh Kumar K.V if (!err) { 27656bc6e63fSAneesh Kumar K.V err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 27666bc6e63fSAneesh Kumar K.V } 2767833f4077SPeter Zijlstra if (err) { 2768b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "insufficient memory"); 2769833f4077SPeter Zijlstra goto failed_mount3; 2770833f4077SPeter Zijlstra } 2771ac27a0ecSDave Kleikamp 2772c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 277355138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 2774c9de560dSAlex Tomas 2775ac27a0ecSDave Kleikamp /* 2776ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2777ac27a0ecSDave Kleikamp */ 27789ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 27799ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 2780617ba13bSMingming Cao sb->s_op = &ext4_sops; 27819ca92389STheodore Ts'o else 27829ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 2783617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2784617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2785ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2786617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2787617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2788ac27a0ecSDave Kleikamp #endif 2789ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 27903b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 279132ed5058STheodore Ts'o mutex_init(&sbi->s_resize_lock); 2792ac27a0ecSDave Kleikamp 2793ac27a0ecSDave Kleikamp sb->s_root = NULL; 2794ac27a0ecSDave Kleikamp 2795ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2796617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2797617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2798ac27a0ecSDave Kleikamp 2799ac27a0ecSDave Kleikamp /* 2800ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2801ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2802ac27a0ecSDave Kleikamp */ 2803ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2804617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2805617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2806ac27a0ecSDave Kleikamp goto failed_mount3; 28070390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 28080390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2809b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 2810b31e1552SEric Sandeen "suppressed and not mounted read-only"); 2811*744692dcSJiaying Zhang goto failed_mount_wq; 2812ac27a0ecSDave Kleikamp } else { 28130390131bSFrank Mayhar clear_opt(sbi->s_mount_opt, DATA_FLAGS); 28140390131bSFrank Mayhar set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 28150390131bSFrank Mayhar sbi->s_journal = NULL; 28160390131bSFrank Mayhar needs_recovery = 0; 28170390131bSFrank Mayhar goto no_journal; 2818ac27a0ecSDave Kleikamp } 2819ac27a0ecSDave Kleikamp 2820eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2821eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2822eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2823b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 2824*744692dcSJiaying Zhang goto failed_mount_wq; 2825eb40a09cSJose R. Santos } 2826eb40a09cSJose R. Santos 2827d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 2828d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 2829d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2830d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2831d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 2832818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2833818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2834818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2835818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2836d4da6c9cSLinus Torvalds } else { 2837d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 2838d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2839d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2840d4da6c9cSLinus Torvalds } 2841818d276cSGirish Shilamkar 2842ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2843ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2844ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 2845ac27a0ecSDave Kleikamp case 0: 2846ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 284763f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 284863f57933SAndrew Morton * cope, else JOURNAL_DATA 284963f57933SAndrew Morton */ 2850dab291afSMingming Cao if (jbd2_journal_check_available_features 2851dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 2852ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 2853ac27a0ecSDave Kleikamp else 2854ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2855ac27a0ecSDave Kleikamp break; 2856ac27a0ecSDave Kleikamp 2857617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 2858617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 2859dab291afSMingming Cao if (!jbd2_journal_check_available_features 2860dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 2861b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 2862b31e1552SEric Sandeen "requested data journaling mode"); 2863*744692dcSJiaying Zhang goto failed_mount_wq; 2864ac27a0ecSDave Kleikamp } 2865ac27a0ecSDave Kleikamp default: 2866ac27a0ecSDave Kleikamp break; 2867ac27a0ecSDave Kleikamp } 2868b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 2869ac27a0ecSDave Kleikamp 28700390131bSFrank Mayhar no_journal: 2871ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 2872617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 2873b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring nobh option - " 2874b31e1552SEric Sandeen "its supported only with writeback mode"); 2875ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 2876ac27a0ecSDave Kleikamp } 2877*744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) { 2878*744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "dioread_nolock option is " 2879*744692dcSJiaying Zhang "not supported with nobh mode"); 2880*744692dcSJiaying Zhang goto failed_mount_wq; 2881*744692dcSJiaying Zhang } 2882ac27a0ecSDave Kleikamp } 28834c0425ffSMingming Cao EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); 28844c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 28854c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 28864c0425ffSMingming Cao goto failed_mount_wq; 28874c0425ffSMingming Cao } 28884c0425ffSMingming Cao 2889ac27a0ecSDave Kleikamp /* 2890dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 2891ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 2892ac27a0ecSDave Kleikamp */ 2893ac27a0ecSDave Kleikamp 28941d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 28951d1fe1eeSDavid Howells if (IS_ERR(root)) { 2896b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 28971d1fe1eeSDavid Howells ret = PTR_ERR(root); 2898ac27a0ecSDave Kleikamp goto failed_mount4; 2899ac27a0ecSDave Kleikamp } 2900ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 29011d1fe1eeSDavid Howells iput(root); 2902b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 2903ac27a0ecSDave Kleikamp goto failed_mount4; 2904ac27a0ecSDave Kleikamp } 29051d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 29061d1fe1eeSDavid Howells if (!sb->s_root) { 2907b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 29081d1fe1eeSDavid Howells iput(root); 29091d1fe1eeSDavid Howells ret = -ENOMEM; 29101d1fe1eeSDavid Howells goto failed_mount4; 29111d1fe1eeSDavid Howells } 2912ac27a0ecSDave Kleikamp 2913617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 2914ef7f3835SKalpak Shah 2915ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 2916ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 2917ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2918ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2919ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 2920ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 2921ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2922ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 2923ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2924ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 2925ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2926ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 2927ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2928ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 2929ef7f3835SKalpak Shah } 2930ef7f3835SKalpak Shah } 2931ef7f3835SKalpak Shah /* Check if enough inode space is available */ 2932ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 2933ef7f3835SKalpak Shah sbi->s_inode_size) { 2934ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2935ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2936b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 2937b31e1552SEric Sandeen "available"); 2938ef7f3835SKalpak Shah } 2939ef7f3835SKalpak Shah 294090576c0bSTheodore Ts'o if (test_opt(sb, DELALLOC) && 294190576c0bSTheodore Ts'o (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 2942b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " 2943b31e1552SEric Sandeen "requested data journaling mode"); 2944c2774d84SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 294590576c0bSTheodore Ts'o } 2946*744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) { 2947*744692dcSJiaying Zhang if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 2948*744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 2949*744692dcSJiaying Zhang "option - requested data journaling mode"); 2950*744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 2951*744692dcSJiaying Zhang } 2952*744692dcSJiaying Zhang if (sb->s_blocksize < PAGE_SIZE) { 2953*744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 2954*744692dcSJiaying Zhang "option - block size is too small"); 2955*744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 2956*744692dcSJiaying Zhang } 2957*744692dcSJiaying Zhang } 2958c2774d84SAneesh Kumar K.V 29596fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 29606fd058f7STheodore Ts'o if (err) { 2961b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 29626fd058f7STheodore Ts'o "zone (%d)\n", err); 29636fd058f7STheodore Ts'o goto failed_mount4; 29646fd058f7STheodore Ts'o } 29656fd058f7STheodore Ts'o 2966c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 2967c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 2968c2774d84SAneesh Kumar K.V if (err) { 2969b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initalize mballoc (%d)", 2970c2774d84SAneesh Kumar K.V err); 2971c2774d84SAneesh Kumar K.V goto failed_mount4; 2972c2774d84SAneesh Kumar K.V } 2973c2774d84SAneesh Kumar K.V 29743197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 29753197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 29763197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 29773197ebdbSTheodore Ts'o "%s", sb->s_id); 29783197ebdbSTheodore Ts'o if (err) { 29793197ebdbSTheodore Ts'o ext4_mb_release(sb); 29803197ebdbSTheodore Ts'o ext4_ext_release(sb); 29813197ebdbSTheodore Ts'o goto failed_mount4; 29823197ebdbSTheodore Ts'o }; 29833197ebdbSTheodore Ts'o 2984617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 2985617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 2986617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 29870390131bSFrank Mayhar if (needs_recovery) { 2988b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 2989617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 29900390131bSFrank Mayhar } 29910390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 29920390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 29930390131bSFrank Mayhar descr = " journalled data mode"; 29940390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 29950390131bSFrank Mayhar descr = " ordered data mode"; 29960390131bSFrank Mayhar else 29970390131bSFrank Mayhar descr = " writeback data mode"; 29980390131bSFrank Mayhar } else 29990390131bSFrank Mayhar descr = "out journal"; 30000390131bSFrank Mayhar 3001b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "mounted filesystem with%s", descr); 3002ac27a0ecSDave Kleikamp 3003ac27a0ecSDave Kleikamp lock_kernel(); 3004ac27a0ecSDave Kleikamp return 0; 3005ac27a0ecSDave Kleikamp 3006617ba13bSMingming Cao cantfind_ext4: 3007ac27a0ecSDave Kleikamp if (!silent) 3008b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3009ac27a0ecSDave Kleikamp goto failed_mount; 3010ac27a0ecSDave Kleikamp 3011ac27a0ecSDave Kleikamp failed_mount4: 3012b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 30134c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 30144c0425ffSMingming Cao failed_mount_wq: 30156fd058f7STheodore Ts'o ext4_release_system_zone(sb); 30160390131bSFrank Mayhar if (sbi->s_journal) { 3017dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 301847b4a50bSJan Kara sbi->s_journal = NULL; 30190390131bSFrank Mayhar } 3020ac27a0ecSDave Kleikamp failed_mount3: 3021c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) { 3022c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 3023c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 3024c5ca7c76STheodore Ts'o else 3025c5ca7c76STheodore Ts'o kfree(sbi->s_flex_groups); 3026c5ca7c76STheodore Ts'o } 3027ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 3028ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 3029ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 30306bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 3031ac27a0ecSDave Kleikamp failed_mount2: 3032ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 3033ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 3034ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 3035ac27a0ecSDave Kleikamp failed_mount: 3036240799cdSTheodore Ts'o if (sbi->s_proc) { 30379f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 3038240799cdSTheodore Ts'o } 3039ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3040ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3041ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3042ac27a0ecSDave Kleikamp #endif 3043617ba13bSMingming Cao ext4_blkdev_remove(sbi); 3044ac27a0ecSDave Kleikamp brelse(bh); 3045ac27a0ecSDave Kleikamp out_fail: 3046ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 3047f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 3048ac27a0ecSDave Kleikamp kfree(sbi); 3049ac27a0ecSDave Kleikamp lock_kernel(); 30501d1fe1eeSDavid Howells return ret; 3051ac27a0ecSDave Kleikamp } 3052ac27a0ecSDave Kleikamp 3053ac27a0ecSDave Kleikamp /* 3054ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 3055ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 3056ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 3057ac27a0ecSDave Kleikamp */ 3058617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3059ac27a0ecSDave Kleikamp { 3060617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3061ac27a0ecSDave Kleikamp 3062ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 306330773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 306430773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3065ac27a0ecSDave Kleikamp 3066ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 3067ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3068dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3069ac27a0ecSDave Kleikamp else 3070dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 30715bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 30725bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 30735bf5683aSHidehiro Kawai else 30745bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3075ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 3076ac27a0ecSDave Kleikamp } 3077ac27a0ecSDave Kleikamp 3078617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3079ac27a0ecSDave Kleikamp unsigned int journal_inum) 3080ac27a0ecSDave Kleikamp { 3081ac27a0ecSDave Kleikamp struct inode *journal_inode; 3082ac27a0ecSDave Kleikamp journal_t *journal; 3083ac27a0ecSDave Kleikamp 30840390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 30850390131bSFrank Mayhar 3086ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3087ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3088ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3089ac27a0ecSDave Kleikamp 30901d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 30911d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3092b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3093ac27a0ecSDave Kleikamp return NULL; 3094ac27a0ecSDave Kleikamp } 3095ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3096ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3097ac27a0ecSDave Kleikamp iput(journal_inode); 3098b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3099ac27a0ecSDave Kleikamp return NULL; 3100ac27a0ecSDave Kleikamp } 3101ac27a0ecSDave Kleikamp 3102e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3103ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 31041d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3105b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3106ac27a0ecSDave Kleikamp iput(journal_inode); 3107ac27a0ecSDave Kleikamp return NULL; 3108ac27a0ecSDave Kleikamp } 3109ac27a0ecSDave Kleikamp 3110dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3111ac27a0ecSDave Kleikamp if (!journal) { 3112b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3113ac27a0ecSDave Kleikamp iput(journal_inode); 3114ac27a0ecSDave Kleikamp return NULL; 3115ac27a0ecSDave Kleikamp } 3116ac27a0ecSDave Kleikamp journal->j_private = sb; 3117617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3118ac27a0ecSDave Kleikamp return journal; 3119ac27a0ecSDave Kleikamp } 3120ac27a0ecSDave Kleikamp 3121617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3122ac27a0ecSDave Kleikamp dev_t j_dev) 3123ac27a0ecSDave Kleikamp { 3124ac27a0ecSDave Kleikamp struct buffer_head *bh; 3125ac27a0ecSDave Kleikamp journal_t *journal; 3126617ba13bSMingming Cao ext4_fsblk_t start; 3127617ba13bSMingming Cao ext4_fsblk_t len; 3128ac27a0ecSDave Kleikamp int hblock, blocksize; 3129617ba13bSMingming Cao ext4_fsblk_t sb_block; 3130ac27a0ecSDave Kleikamp unsigned long offset; 3131617ba13bSMingming Cao struct ext4_super_block *es; 3132ac27a0ecSDave Kleikamp struct block_device *bdev; 3133ac27a0ecSDave Kleikamp 31340390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 31350390131bSFrank Mayhar 3136b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3137ac27a0ecSDave Kleikamp if (bdev == NULL) 3138ac27a0ecSDave Kleikamp return NULL; 3139ac27a0ecSDave Kleikamp 3140ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 3141b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3142b31e1552SEric Sandeen "failed to claim external journal device"); 31439a1c3542SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 3144ac27a0ecSDave Kleikamp return NULL; 3145ac27a0ecSDave Kleikamp } 3146ac27a0ecSDave Kleikamp 3147ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3148e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3149ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3150b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3151b31e1552SEric Sandeen "blocksize too small for journal device"); 3152ac27a0ecSDave Kleikamp goto out_bdev; 3153ac27a0ecSDave Kleikamp } 3154ac27a0ecSDave Kleikamp 3155617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3156617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3157ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3158ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3159b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3160b31e1552SEric Sandeen "external journal"); 3161ac27a0ecSDave Kleikamp goto out_bdev; 3162ac27a0ecSDave Kleikamp } 3163ac27a0ecSDave Kleikamp 3164617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3165617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3166ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3167617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3168b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3169b31e1552SEric Sandeen "bad superblock"); 3170ac27a0ecSDave Kleikamp brelse(bh); 3171ac27a0ecSDave Kleikamp goto out_bdev; 3172ac27a0ecSDave Kleikamp } 3173ac27a0ecSDave Kleikamp 3174617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3175b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3176ac27a0ecSDave Kleikamp brelse(bh); 3177ac27a0ecSDave Kleikamp goto out_bdev; 3178ac27a0ecSDave Kleikamp } 3179ac27a0ecSDave Kleikamp 3180bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3181ac27a0ecSDave Kleikamp start = sb_block + 1; 3182ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3183ac27a0ecSDave Kleikamp 3184dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3185ac27a0ecSDave Kleikamp start, len, blocksize); 3186ac27a0ecSDave Kleikamp if (!journal) { 3187b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3188ac27a0ecSDave Kleikamp goto out_bdev; 3189ac27a0ecSDave Kleikamp } 3190ac27a0ecSDave Kleikamp journal->j_private = sb; 3191ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3192ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3193ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3194b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3195ac27a0ecSDave Kleikamp goto out_journal; 3196ac27a0ecSDave Kleikamp } 3197ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3198b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3199b31e1552SEric Sandeen "user (unsupported) - %d", 3200ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3201ac27a0ecSDave Kleikamp goto out_journal; 3202ac27a0ecSDave Kleikamp } 3203617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3204617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3205ac27a0ecSDave Kleikamp return journal; 32060b8e58a1SAndreas Dilger 3207ac27a0ecSDave Kleikamp out_journal: 3208dab291afSMingming Cao jbd2_journal_destroy(journal); 3209ac27a0ecSDave Kleikamp out_bdev: 3210617ba13bSMingming Cao ext4_blkdev_put(bdev); 3211ac27a0ecSDave Kleikamp return NULL; 3212ac27a0ecSDave Kleikamp } 3213ac27a0ecSDave Kleikamp 3214617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3215617ba13bSMingming Cao struct ext4_super_block *es, 3216ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3217ac27a0ecSDave Kleikamp { 3218ac27a0ecSDave Kleikamp journal_t *journal; 3219ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3220ac27a0ecSDave Kleikamp dev_t journal_dev; 3221ac27a0ecSDave Kleikamp int err = 0; 3222ac27a0ecSDave Kleikamp int really_read_only; 3223ac27a0ecSDave Kleikamp 32240390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 32250390131bSFrank Mayhar 3226ac27a0ecSDave Kleikamp if (journal_devnum && 3227ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3228b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3229b31e1552SEric Sandeen "numbers have changed"); 3230ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3231ac27a0ecSDave Kleikamp } else 3232ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3233ac27a0ecSDave Kleikamp 3234ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3235ac27a0ecSDave Kleikamp 3236ac27a0ecSDave Kleikamp /* 3237ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3238ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3239ac27a0ecSDave Kleikamp * can get read-write access to the device. 3240ac27a0ecSDave Kleikamp */ 3241617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3242ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3243b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3244b31e1552SEric Sandeen "required on readonly filesystem"); 3245ac27a0ecSDave Kleikamp if (really_read_only) { 3246b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3247b31e1552SEric Sandeen "unavailable, cannot proceed"); 3248ac27a0ecSDave Kleikamp return -EROFS; 3249ac27a0ecSDave Kleikamp } 3250b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 3251b31e1552SEric Sandeen "be enabled during recovery"); 3252ac27a0ecSDave Kleikamp } 3253ac27a0ecSDave Kleikamp } 3254ac27a0ecSDave Kleikamp 3255ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3256b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 3257b31e1552SEric Sandeen "and inode journals!"); 3258ac27a0ecSDave Kleikamp return -EINVAL; 3259ac27a0ecSDave Kleikamp } 3260ac27a0ecSDave Kleikamp 3261ac27a0ecSDave Kleikamp if (journal_inum) { 3262617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3263ac27a0ecSDave Kleikamp return -EINVAL; 3264ac27a0ecSDave Kleikamp } else { 3265617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3266ac27a0ecSDave Kleikamp return -EINVAL; 3267ac27a0ecSDave Kleikamp } 3268ac27a0ecSDave Kleikamp 326990576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 3270b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 32714776004fSTheodore Ts'o 3272ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 3273dab291afSMingming Cao err = jbd2_journal_update_format(journal); 3274ac27a0ecSDave Kleikamp if (err) { 3275b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 3276dab291afSMingming Cao jbd2_journal_destroy(journal); 3277ac27a0ecSDave Kleikamp return err; 3278ac27a0ecSDave Kleikamp } 3279ac27a0ecSDave Kleikamp } 3280ac27a0ecSDave Kleikamp 3281617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3282dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 3283ac27a0ecSDave Kleikamp if (!err) 3284dab291afSMingming Cao err = jbd2_journal_load(journal); 3285ac27a0ecSDave Kleikamp 3286ac27a0ecSDave Kleikamp if (err) { 3287b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 3288dab291afSMingming Cao jbd2_journal_destroy(journal); 3289ac27a0ecSDave Kleikamp return err; 3290ac27a0ecSDave Kleikamp } 3291ac27a0ecSDave Kleikamp 3292617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 3293617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3294ac27a0ecSDave Kleikamp 3295ac27a0ecSDave Kleikamp if (journal_devnum && 3296ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3297ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 3298ac27a0ecSDave Kleikamp 3299ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 3300e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3301ac27a0ecSDave Kleikamp } 3302ac27a0ecSDave Kleikamp 3303ac27a0ecSDave Kleikamp return 0; 3304ac27a0ecSDave Kleikamp } 3305ac27a0ecSDave Kleikamp 3306e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 3307ac27a0ecSDave Kleikamp { 3308e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3309617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 3310c4be0c1dSTakashi Sato int error = 0; 3311ac27a0ecSDave Kleikamp 3312ac27a0ecSDave Kleikamp if (!sbh) 3313c4be0c1dSTakashi Sato return error; 3314914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 3315914258bfSTheodore Ts'o /* 3316914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 3317914258bfSTheodore Ts'o * superblock failed. This could happen because the 3318914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 3319914258bfSTheodore Ts'o * be a transient write error and maybe the block will 3320914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 3321914258bfSTheodore Ts'o * write and hope for the best. 3322914258bfSTheodore Ts'o */ 3323b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 3324b31e1552SEric Sandeen "superblock detected"); 3325914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3326914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3327914258bfSTheodore Ts'o } 332871290b36STheodore Ts'o /* 332971290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 333071290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 333171290b36STheodore Ts'o * write time when we are mounting the root file system 333271290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 333371290b36STheodore Ts'o * for people who are east of GMT and who make their clock 333471290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 333571290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 333671290b36STheodore Ts'o * to complain and force a full file system check. 333771290b36STheodore Ts'o */ 333871290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 3339ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 3340afc32f7eSTheodore Ts'o es->s_kbytes_written = 3341afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 3342afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 3343afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 33445d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 33455d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 33465d1b1b3fSAneesh Kumar K.V es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( 33475d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 33487234ab2aSTheodore Ts'o sb->s_dirt = 0; 3349ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 3350ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 3351914258bfSTheodore Ts'o if (sync) { 3352c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 3353c4be0c1dSTakashi Sato if (error) 3354c4be0c1dSTakashi Sato return error; 3355c4be0c1dSTakashi Sato 3356c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 3357c4be0c1dSTakashi Sato if (error) { 3358b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 3359b31e1552SEric Sandeen "superblock"); 3360914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3361914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3362914258bfSTheodore Ts'o } 3363914258bfSTheodore Ts'o } 3364c4be0c1dSTakashi Sato return error; 3365ac27a0ecSDave Kleikamp } 3366ac27a0ecSDave Kleikamp 3367ac27a0ecSDave Kleikamp /* 3368ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 3369ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 3370ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 3371ac27a0ecSDave Kleikamp */ 3372617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 3373617ba13bSMingming Cao struct ext4_super_block *es) 3374ac27a0ecSDave Kleikamp { 3375617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 3376ac27a0ecSDave Kleikamp 33770390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 33780390131bSFrank Mayhar BUG_ON(journal != NULL); 33790390131bSFrank Mayhar return; 33800390131bSFrank Mayhar } 3381dab291afSMingming Cao jbd2_journal_lock_updates(journal); 33827ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 33837ffe1ea8SHidehiro Kawai goto out; 33847ffe1ea8SHidehiro Kawai 3385617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 3386ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 3387617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3388e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3389ac27a0ecSDave Kleikamp } 33907ffe1ea8SHidehiro Kawai 33917ffe1ea8SHidehiro Kawai out: 3392dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 3393ac27a0ecSDave Kleikamp } 3394ac27a0ecSDave Kleikamp 3395ac27a0ecSDave Kleikamp /* 3396ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 3397ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 3398ac27a0ecSDave Kleikamp * main filesystem now. 3399ac27a0ecSDave Kleikamp */ 3400617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 3401617ba13bSMingming Cao struct ext4_super_block *es) 3402ac27a0ecSDave Kleikamp { 3403ac27a0ecSDave Kleikamp journal_t *journal; 3404ac27a0ecSDave Kleikamp int j_errno; 3405ac27a0ecSDave Kleikamp const char *errstr; 3406ac27a0ecSDave Kleikamp 34070390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 34080390131bSFrank Mayhar 3409617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 3410ac27a0ecSDave Kleikamp 3411ac27a0ecSDave Kleikamp /* 3412ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 3413617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 3414ac27a0ecSDave Kleikamp */ 3415ac27a0ecSDave Kleikamp 3416dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 3417ac27a0ecSDave Kleikamp if (j_errno) { 3418ac27a0ecSDave Kleikamp char nbuf[16]; 3419ac27a0ecSDave Kleikamp 3420617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 342112062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 3422ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 342312062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 3424ac27a0ecSDave Kleikamp 3425617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3426617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3427e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3428ac27a0ecSDave Kleikamp 3429dab291afSMingming Cao jbd2_journal_clear_err(journal); 3430ac27a0ecSDave Kleikamp } 3431ac27a0ecSDave Kleikamp } 3432ac27a0ecSDave Kleikamp 3433ac27a0ecSDave Kleikamp /* 3434ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 3435ac27a0ecSDave Kleikamp * and wait on the commit. 3436ac27a0ecSDave Kleikamp */ 3437617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 3438ac27a0ecSDave Kleikamp { 3439ac27a0ecSDave Kleikamp journal_t *journal; 34400390131bSFrank Mayhar int ret = 0; 3441ac27a0ecSDave Kleikamp 3442ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 3443ac27a0ecSDave Kleikamp return 0; 3444ac27a0ecSDave Kleikamp 3445617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 34467234ab2aSTheodore Ts'o if (journal) 3447617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 34480390131bSFrank Mayhar 3449ac27a0ecSDave Kleikamp return ret; 3450ac27a0ecSDave Kleikamp } 3451ac27a0ecSDave Kleikamp 3452617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 3453ac27a0ecSDave Kleikamp { 3454ebc1ac16SChristoph Hellwig lock_super(sb); 3455e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3456ebc1ac16SChristoph Hellwig unlock_super(sb); 34570390131bSFrank Mayhar } 3458ac27a0ecSDave Kleikamp 3459617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 3460ac27a0ecSDave Kleikamp { 346114ce0cb4STheodore Ts'o int ret = 0; 34629eddacf9SJan Kara tid_t target; 34638d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3464ac27a0ecSDave Kleikamp 34659bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 34668d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 34678d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 3468ac27a0ecSDave Kleikamp if (wait) 34698d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 34700390131bSFrank Mayhar } 347114ce0cb4STheodore Ts'o return ret; 3472ac27a0ecSDave Kleikamp } 3473ac27a0ecSDave Kleikamp 3474ac27a0ecSDave Kleikamp /* 3475ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 3476ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 3477ac27a0ecSDave Kleikamp */ 3478c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 3479ac27a0ecSDave Kleikamp { 3480c4be0c1dSTakashi Sato int error = 0; 3481c4be0c1dSTakashi Sato journal_t *journal; 3482ac27a0ecSDave Kleikamp 34839ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 34849ca92389STheodore Ts'o return 0; 34859ca92389STheodore Ts'o 3486c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 3487ac27a0ecSDave Kleikamp 3488ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 3489dab291afSMingming Cao jbd2_journal_lock_updates(journal); 34907ffe1ea8SHidehiro Kawai 34917ffe1ea8SHidehiro Kawai /* 34929ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 34939ca92389STheodore Ts'o * the journal. 34947ffe1ea8SHidehiro Kawai */ 3495c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 34969ca92389STheodore Ts'o if (error < 0) { 34979ca92389STheodore Ts'o out: 34989ca92389STheodore Ts'o jbd2_journal_unlock_updates(journal); 34999ca92389STheodore Ts'o return error; 35000390131bSFrank Mayhar } 3501ac27a0ecSDave Kleikamp 3502ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 3503617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3504e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 3505c4be0c1dSTakashi Sato if (error) 3506c4be0c1dSTakashi Sato goto out; 3507c4be0c1dSTakashi Sato return 0; 3508ac27a0ecSDave Kleikamp } 3509ac27a0ecSDave Kleikamp 3510ac27a0ecSDave Kleikamp /* 3511ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 3512ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 3513ac27a0ecSDave Kleikamp */ 3514c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 3515ac27a0ecSDave Kleikamp { 35169ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 35179ca92389STheodore Ts'o return 0; 35189ca92389STheodore Ts'o 3519ac27a0ecSDave Kleikamp lock_super(sb); 35209ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 3521617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3522e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3523ac27a0ecSDave Kleikamp unlock_super(sb); 3524dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 3525c4be0c1dSTakashi Sato return 0; 3526ac27a0ecSDave Kleikamp } 3527ac27a0ecSDave Kleikamp 3528617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 3529ac27a0ecSDave Kleikamp { 3530617ba13bSMingming Cao struct ext4_super_block *es; 3531617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3532617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 3533ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 3534617ba13bSMingming Cao struct ext4_mount_options old_opts; 35358a266467STheodore Ts'o ext4_group_t g; 3536b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3537ac27a0ecSDave Kleikamp int err; 3538ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3539ac27a0ecSDave Kleikamp int i; 3540ac27a0ecSDave Kleikamp #endif 3541ac27a0ecSDave Kleikamp 3542337eb00aSAlessio Igor Bogani lock_kernel(); 3543337eb00aSAlessio Igor Bogani 3544ac27a0ecSDave Kleikamp /* Store the original options */ 3545bbd6851aSAl Viro lock_super(sb); 3546ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 3547ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 3548ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 3549ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 3550ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 355130773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 355230773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 3553ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3554ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 3555ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3556ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 3557ac27a0ecSDave Kleikamp #endif 3558b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 3559b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 3560ac27a0ecSDave Kleikamp 3561ac27a0ecSDave Kleikamp /* 3562ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 3563ac27a0ecSDave Kleikamp */ 3564b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 3565b3881f74STheodore Ts'o &n_blocks_count, 1)) { 3566ac27a0ecSDave Kleikamp err = -EINVAL; 3567ac27a0ecSDave Kleikamp goto restore_opts; 3568ac27a0ecSDave Kleikamp } 3569ac27a0ecSDave Kleikamp 35704ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 357146e665e9SHarvey Harrison ext4_abort(sb, __func__, "Abort forced by user"); 3572ac27a0ecSDave Kleikamp 3573ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3574482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3575ac27a0ecSDave Kleikamp 3576ac27a0ecSDave Kleikamp es = sbi->s_es; 3577ac27a0ecSDave Kleikamp 3578b3881f74STheodore Ts'o if (sbi->s_journal) { 3579617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 3580b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3581b3881f74STheodore Ts'o } 3582ac27a0ecSDave Kleikamp 3583ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 3584bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 35854ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 3586ac27a0ecSDave Kleikamp err = -EROFS; 3587ac27a0ecSDave Kleikamp goto restore_opts; 3588ac27a0ecSDave Kleikamp } 3589ac27a0ecSDave Kleikamp 3590ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 3591ac27a0ecSDave Kleikamp /* 3592ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 3593ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 3594ac27a0ecSDave Kleikamp */ 3595ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 3596ac27a0ecSDave Kleikamp 3597ac27a0ecSDave Kleikamp /* 3598ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 3599ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 3600ac27a0ecSDave Kleikamp * mark the partition as valid again. 3601ac27a0ecSDave Kleikamp */ 3602617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 3603617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 3604ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 3605ac27a0ecSDave Kleikamp 3606a63c9eb2STheodore Ts'o if (sbi->s_journal) 3607617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 3608ac27a0ecSDave Kleikamp } else { 3609a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 3610a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 3611ac27a0ecSDave Kleikamp err = -EROFS; 3612ac27a0ecSDave Kleikamp goto restore_opts; 3613ac27a0ecSDave Kleikamp } 3614ead6596bSEric Sandeen /* 36158a266467STheodore Ts'o * Make sure the group descriptor checksums 36160b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 36178a266467STheodore Ts'o */ 36188a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 36198a266467STheodore Ts'o struct ext4_group_desc *gdp = 36208a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 36218a266467STheodore Ts'o 36228a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 3623b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3624b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 36258a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 36268a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 36278a266467STheodore Ts'o err = -EINVAL; 36288a266467STheodore Ts'o goto restore_opts; 36298a266467STheodore Ts'o } 36308a266467STheodore Ts'o } 36318a266467STheodore Ts'o 36328a266467STheodore Ts'o /* 3633ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 3634ead6596bSEric Sandeen * around from a previously readonly bdev mount, 3635ead6596bSEric Sandeen * require a full umount/remount for now. 3636ead6596bSEric Sandeen */ 3637ead6596bSEric Sandeen if (es->s_last_orphan) { 3638b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 3639ead6596bSEric Sandeen "remount RDWR because of unprocessed " 3640ead6596bSEric Sandeen "orphan inode list. Please " 3641b31e1552SEric Sandeen "umount/remount instead"); 3642ead6596bSEric Sandeen err = -EINVAL; 3643ead6596bSEric Sandeen goto restore_opts; 3644ead6596bSEric Sandeen } 3645ead6596bSEric Sandeen 3646ac27a0ecSDave Kleikamp /* 3647ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 3648ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 3649ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 3650ac27a0ecSDave Kleikamp * the partition.) 3651ac27a0ecSDave Kleikamp */ 36520390131bSFrank Mayhar if (sbi->s_journal) 3653617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3654ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3655617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 3656ac27a0ecSDave Kleikamp goto restore_opts; 3657617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 3658ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 3659ac27a0ecSDave Kleikamp } 3660ac27a0ecSDave Kleikamp } 36616fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 36620390131bSFrank Mayhar if (sbi->s_journal == NULL) 3663e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 36640390131bSFrank Mayhar 3665ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3666ac27a0ecSDave Kleikamp /* Release old quota file names */ 3667ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3668ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 3669ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3670ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 3671ac27a0ecSDave Kleikamp #endif 3672bbd6851aSAl Viro unlock_super(sb); 3673337eb00aSAlessio Igor Bogani unlock_kernel(); 3674ac27a0ecSDave Kleikamp return 0; 36750b8e58a1SAndreas Dilger 3676ac27a0ecSDave Kleikamp restore_opts: 3677ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 3678ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 3679ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 3680ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 3681ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 368230773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 368330773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 3684ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3685ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 3686ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 3687ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 3688ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3689ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3690ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 3691ac27a0ecSDave Kleikamp } 3692ac27a0ecSDave Kleikamp #endif 3693bbd6851aSAl Viro unlock_super(sb); 3694337eb00aSAlessio Igor Bogani unlock_kernel(); 3695ac27a0ecSDave Kleikamp return err; 3696ac27a0ecSDave Kleikamp } 3697ac27a0ecSDave Kleikamp 3698617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 3699ac27a0ecSDave Kleikamp { 3700ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 3701617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3702617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 3703960cc398SPekka Enberg u64 fsid; 3704ac27a0ecSDave Kleikamp 37055e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 37065e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 37076bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 37088df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 37095e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 3710ac27a0ecSDave Kleikamp 3711ac27a0ecSDave Kleikamp /* 37125e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 37135e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 37145e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 3715ac27a0ecSDave Kleikamp */ 3716ac27a0ecSDave Kleikamp 3717ac27a0ecSDave Kleikamp /* 3718ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 3719ac27a0ecSDave Kleikamp * overhead 3720ac27a0ecSDave Kleikamp */ 3721ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 3722ac27a0ecSDave Kleikamp 3723ac27a0ecSDave Kleikamp /* 3724ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 3725ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 3726ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 3727ac27a0ecSDave Kleikamp */ 3728ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 3729617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 3730617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 3731ac27a0ecSDave Kleikamp cond_resched(); 3732ac27a0ecSDave Kleikamp } 3733ac27a0ecSDave Kleikamp 3734ac27a0ecSDave Kleikamp /* 3735ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 3736ac27a0ecSDave Kleikamp * bitmap, and an inode table. 3737ac27a0ecSDave Kleikamp */ 37385e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 37395e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 37405e70030dSBadari Pulavarty smp_wmb(); 37416bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 3742ac27a0ecSDave Kleikamp } 3743ac27a0ecSDave Kleikamp 3744617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 3745ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 37465e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 37476bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 37486bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 3749bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 3750bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 3751ac27a0ecSDave Kleikamp buf->f_bavail = 0; 3752ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 375352d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 3754617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 3755960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 3756960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 3757960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 3758960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 37590b8e58a1SAndreas Dilger 3760ac27a0ecSDave Kleikamp return 0; 3761ac27a0ecSDave Kleikamp } 3762ac27a0ecSDave Kleikamp 37630b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 37640b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 3765ac27a0ecSDave Kleikamp * Process 1 Process 2 3766617ba13bSMingming Cao * ext4_create() quota_sync() 3767dab291afSMingming Cao * jbd2_journal_start() write_dquot() 3768a269eb18SJan Kara * vfs_dq_init() down(dqio_mutex) 3769dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 3770ac27a0ecSDave Kleikamp * 3771ac27a0ecSDave Kleikamp */ 3772ac27a0ecSDave Kleikamp 3773ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3774ac27a0ecSDave Kleikamp 3775ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3776ac27a0ecSDave Kleikamp { 3777ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3778ac27a0ecSDave Kleikamp } 3779ac27a0ecSDave Kleikamp 3780617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3781ac27a0ecSDave Kleikamp { 3782ac27a0ecSDave Kleikamp int ret, err; 3783ac27a0ecSDave Kleikamp handle_t *handle; 3784ac27a0ecSDave Kleikamp struct inode *inode; 3785ac27a0ecSDave Kleikamp 3786ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3787617ba13bSMingming Cao handle = ext4_journal_start(inode, 3788617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3789ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3790ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3791ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3792617ba13bSMingming Cao err = ext4_journal_stop(handle); 3793ac27a0ecSDave Kleikamp if (!ret) 3794ac27a0ecSDave Kleikamp ret = err; 3795ac27a0ecSDave Kleikamp return ret; 3796ac27a0ecSDave Kleikamp } 3797ac27a0ecSDave Kleikamp 3798617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3799ac27a0ecSDave Kleikamp { 3800ac27a0ecSDave Kleikamp int ret, err; 3801ac27a0ecSDave Kleikamp handle_t *handle; 3802ac27a0ecSDave Kleikamp 3803617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3804617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3805ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3806ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3807ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 3808617ba13bSMingming Cao err = ext4_journal_stop(handle); 3809ac27a0ecSDave Kleikamp if (!ret) 3810ac27a0ecSDave Kleikamp ret = err; 3811ac27a0ecSDave Kleikamp return ret; 3812ac27a0ecSDave Kleikamp } 3813ac27a0ecSDave Kleikamp 3814617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 3815ac27a0ecSDave Kleikamp { 3816ac27a0ecSDave Kleikamp int ret, err; 3817ac27a0ecSDave Kleikamp handle_t *handle; 3818ac27a0ecSDave Kleikamp 3819617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3820617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 38219c3013e9SJan Kara if (IS_ERR(handle)) { 38229c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 38239c3013e9SJan Kara dquot_release(dquot); 3824ac27a0ecSDave Kleikamp return PTR_ERR(handle); 38259c3013e9SJan Kara } 3826ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 3827617ba13bSMingming Cao err = ext4_journal_stop(handle); 3828ac27a0ecSDave Kleikamp if (!ret) 3829ac27a0ecSDave Kleikamp ret = err; 3830ac27a0ecSDave Kleikamp return ret; 3831ac27a0ecSDave Kleikamp } 3832ac27a0ecSDave Kleikamp 3833617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 3834ac27a0ecSDave Kleikamp { 38352c8be6b2SJan Kara /* Are we journaling quotas? */ 3836617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 3837617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 3838ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 3839617ba13bSMingming Cao return ext4_write_dquot(dquot); 3840ac27a0ecSDave Kleikamp } else { 3841ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 3842ac27a0ecSDave Kleikamp } 3843ac27a0ecSDave Kleikamp } 3844ac27a0ecSDave Kleikamp 3845617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 3846ac27a0ecSDave Kleikamp { 3847ac27a0ecSDave Kleikamp int ret, err; 3848ac27a0ecSDave Kleikamp handle_t *handle; 3849ac27a0ecSDave Kleikamp 3850ac27a0ecSDave Kleikamp /* Data block + inode block */ 3851617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 3852ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3853ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3854ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 3855617ba13bSMingming Cao err = ext4_journal_stop(handle); 3856ac27a0ecSDave Kleikamp if (!ret) 3857ac27a0ecSDave Kleikamp ret = err; 3858ac27a0ecSDave Kleikamp return ret; 3859ac27a0ecSDave Kleikamp } 3860ac27a0ecSDave Kleikamp 3861ac27a0ecSDave Kleikamp /* 3862ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 3863ac27a0ecSDave Kleikamp * the quota file and such... 3864ac27a0ecSDave Kleikamp */ 3865617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 3866ac27a0ecSDave Kleikamp { 3867617ba13bSMingming Cao return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 3868617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 3869ac27a0ecSDave Kleikamp } 3870ac27a0ecSDave Kleikamp 3871ac27a0ecSDave Kleikamp /* 3872ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 3873ac27a0ecSDave Kleikamp */ 3874617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 38758264613dSAl Viro char *name, int remount) 3876ac27a0ecSDave Kleikamp { 3877ac27a0ecSDave Kleikamp int err; 38788264613dSAl Viro struct path path; 3879ac27a0ecSDave Kleikamp 3880ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 3881ac27a0ecSDave Kleikamp return -EINVAL; 38828264613dSAl Viro /* When remounting, no checks are needed and in fact, name is NULL */ 38830623543bSJan Kara if (remount) 38848264613dSAl Viro return vfs_quota_on(sb, type, format_id, name, remount); 38850623543bSJan Kara 38868264613dSAl Viro err = kern_path(name, LOOKUP_FOLLOW, &path); 3887ac27a0ecSDave Kleikamp if (err) 3888ac27a0ecSDave Kleikamp return err; 38890623543bSJan Kara 3890ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 38918264613dSAl Viro if (path.mnt->mnt_sb != sb) { 38928264613dSAl Viro path_put(&path); 3893ac27a0ecSDave Kleikamp return -EXDEV; 3894ac27a0ecSDave Kleikamp } 38950623543bSJan Kara /* Journaling quota? */ 38960623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 38972b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 38988264613dSAl Viro if (path.dentry->d_parent != sb->s_root) 3899b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3900b31e1552SEric Sandeen "Quota file not on filesystem root. " 3901b31e1552SEric Sandeen "Journaled quota will not work"); 39020623543bSJan Kara } 39030623543bSJan Kara 39040623543bSJan Kara /* 39050623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 39060623543bSJan Kara * all updates to the file when we bypass pagecache... 39070623543bSJan Kara */ 39080390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 39090390131bSFrank Mayhar ext4_should_journal_data(path.dentry->d_inode)) { 39100623543bSJan Kara /* 39110623543bSJan Kara * We don't need to lock updates but journal_flush() could 39120623543bSJan Kara * otherwise be livelocked... 39130623543bSJan Kara */ 39140623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 39157ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 39160623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 39177ffe1ea8SHidehiro Kawai if (err) { 39188264613dSAl Viro path_put(&path); 39197ffe1ea8SHidehiro Kawai return err; 39207ffe1ea8SHidehiro Kawai } 39210623543bSJan Kara } 39220623543bSJan Kara 39238264613dSAl Viro err = vfs_quota_on_path(sb, type, format_id, &path); 39248264613dSAl Viro path_put(&path); 392577e69dacSAl Viro return err; 3926ac27a0ecSDave Kleikamp } 3927ac27a0ecSDave Kleikamp 3928ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 3929ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 3930ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 3931ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 3932617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 3933ac27a0ecSDave Kleikamp size_t len, loff_t off) 3934ac27a0ecSDave Kleikamp { 3935ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3936725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3937ac27a0ecSDave Kleikamp int err = 0; 3938ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3939ac27a0ecSDave Kleikamp int tocopy; 3940ac27a0ecSDave Kleikamp size_t toread; 3941ac27a0ecSDave Kleikamp struct buffer_head *bh; 3942ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 3943ac27a0ecSDave Kleikamp 3944ac27a0ecSDave Kleikamp if (off > i_size) 3945ac27a0ecSDave Kleikamp return 0; 3946ac27a0ecSDave Kleikamp if (off+len > i_size) 3947ac27a0ecSDave Kleikamp len = i_size-off; 3948ac27a0ecSDave Kleikamp toread = len; 3949ac27a0ecSDave Kleikamp while (toread > 0) { 3950ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 3951ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 3952617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 3953ac27a0ecSDave Kleikamp if (err) 3954ac27a0ecSDave Kleikamp return err; 3955ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 3956ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 3957ac27a0ecSDave Kleikamp else 3958ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 3959ac27a0ecSDave Kleikamp brelse(bh); 3960ac27a0ecSDave Kleikamp offset = 0; 3961ac27a0ecSDave Kleikamp toread -= tocopy; 3962ac27a0ecSDave Kleikamp data += tocopy; 3963ac27a0ecSDave Kleikamp blk++; 3964ac27a0ecSDave Kleikamp } 3965ac27a0ecSDave Kleikamp return len; 3966ac27a0ecSDave Kleikamp } 3967ac27a0ecSDave Kleikamp 3968ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 3969ac27a0ecSDave Kleikamp * enough credits) */ 3970617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 3971ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 3972ac27a0ecSDave Kleikamp { 3973ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3974725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3975ac27a0ecSDave Kleikamp int err = 0; 3976ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3977ac27a0ecSDave Kleikamp int tocopy; 3978617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 3979ac27a0ecSDave Kleikamp size_t towrite = len; 3980ac27a0ecSDave Kleikamp struct buffer_head *bh; 3981ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 3982ac27a0ecSDave Kleikamp 39830390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 3984b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 3985b31e1552SEric Sandeen " cancelled because transaction is not started", 39869c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 39879c3013e9SJan Kara return -EIO; 39889c3013e9SJan Kara } 3989ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 3990ac27a0ecSDave Kleikamp while (towrite > 0) { 3991ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < towrite ? 3992ac27a0ecSDave Kleikamp sb->s_blocksize - offset : towrite; 3993617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 3994ac27a0ecSDave Kleikamp if (!bh) 3995ac27a0ecSDave Kleikamp goto out; 3996ac27a0ecSDave Kleikamp if (journal_quota) { 3997617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 3998ac27a0ecSDave Kleikamp if (err) { 3999ac27a0ecSDave Kleikamp brelse(bh); 4000ac27a0ecSDave Kleikamp goto out; 4001ac27a0ecSDave Kleikamp } 4002ac27a0ecSDave Kleikamp } 4003ac27a0ecSDave Kleikamp lock_buffer(bh); 4004ac27a0ecSDave Kleikamp memcpy(bh->b_data+offset, data, tocopy); 4005ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 4006ac27a0ecSDave Kleikamp unlock_buffer(bh); 4007ac27a0ecSDave Kleikamp if (journal_quota) 40080390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 4009ac27a0ecSDave Kleikamp else { 4010ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 4011678aaf48SJan Kara err = ext4_jbd2_file_inode(handle, inode); 4012ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 4013ac27a0ecSDave Kleikamp } 4014ac27a0ecSDave Kleikamp brelse(bh); 4015ac27a0ecSDave Kleikamp if (err) 4016ac27a0ecSDave Kleikamp goto out; 4017ac27a0ecSDave Kleikamp offset = 0; 4018ac27a0ecSDave Kleikamp towrite -= tocopy; 4019ac27a0ecSDave Kleikamp data += tocopy; 4020ac27a0ecSDave Kleikamp blk++; 4021ac27a0ecSDave Kleikamp } 4022ac27a0ecSDave Kleikamp out: 40234d04e4fbSJan Kara if (len == towrite) { 40244d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 4025ac27a0ecSDave Kleikamp return err; 40264d04e4fbSJan Kara } 4027ac27a0ecSDave Kleikamp if (inode->i_size < off+len-towrite) { 4028ac27a0ecSDave Kleikamp i_size_write(inode, off+len-towrite); 4029617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 4030ac27a0ecSDave Kleikamp } 4031ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 4032617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 4033ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 4034ac27a0ecSDave Kleikamp return len - towrite; 4035ac27a0ecSDave Kleikamp } 4036ac27a0ecSDave Kleikamp 4037ac27a0ecSDave Kleikamp #endif 4038ac27a0ecSDave Kleikamp 40390b8e58a1SAndreas Dilger static int ext4_get_sb(struct file_system_type *fs_type, int flags, 40400b8e58a1SAndreas Dilger const char *dev_name, void *data, struct vfsmount *mnt) 4041ac27a0ecSDave Kleikamp { 4042617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); 4043ac27a0ecSDave Kleikamp } 4044ac27a0ecSDave Kleikamp 4045a214238dSTheodore Ts'o #if !defined(CONTIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 404624b58424STheodore Ts'o static struct file_system_type ext2_fs_type = { 404724b58424STheodore Ts'o .owner = THIS_MODULE, 404824b58424STheodore Ts'o .name = "ext2", 404924b58424STheodore Ts'o .get_sb = ext4_get_sb, 405024b58424STheodore Ts'o .kill_sb = kill_block_super, 405124b58424STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 405224b58424STheodore Ts'o }; 405324b58424STheodore Ts'o 405424b58424STheodore Ts'o static inline void register_as_ext2(void) 405524b58424STheodore Ts'o { 405624b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 405724b58424STheodore Ts'o if (err) 405824b58424STheodore Ts'o printk(KERN_WARNING 405924b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 406024b58424STheodore Ts'o } 406124b58424STheodore Ts'o 406224b58424STheodore Ts'o static inline void unregister_as_ext2(void) 406324b58424STheodore Ts'o { 406424b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 406524b58424STheodore Ts'o } 406651b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 406724b58424STheodore Ts'o #else 406824b58424STheodore Ts'o static inline void register_as_ext2(void) { } 406924b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 407024b58424STheodore Ts'o #endif 407124b58424STheodore Ts'o 4072a214238dSTheodore Ts'o #if !defined(CONTIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 407324b58424STheodore Ts'o static struct file_system_type ext3_fs_type = { 407424b58424STheodore Ts'o .owner = THIS_MODULE, 407524b58424STheodore Ts'o .name = "ext3", 407624b58424STheodore Ts'o .get_sb = ext4_get_sb, 407724b58424STheodore Ts'o .kill_sb = kill_block_super, 407824b58424STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 407924b58424STheodore Ts'o }; 408024b58424STheodore Ts'o 408124b58424STheodore Ts'o static inline void register_as_ext3(void) 408224b58424STheodore Ts'o { 408324b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 408424b58424STheodore Ts'o if (err) 408524b58424STheodore Ts'o printk(KERN_WARNING 408624b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 408724b58424STheodore Ts'o } 408824b58424STheodore Ts'o 408924b58424STheodore Ts'o static inline void unregister_as_ext3(void) 409024b58424STheodore Ts'o { 409124b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 409224b58424STheodore Ts'o } 409351b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 409424b58424STheodore Ts'o #else 409524b58424STheodore Ts'o static inline void register_as_ext3(void) { } 409624b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 409724b58424STheodore Ts'o #endif 409824b58424STheodore Ts'o 409903010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 4100ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 410103010a33STheodore Ts'o .name = "ext4", 4102617ba13bSMingming Cao .get_sb = ext4_get_sb, 4103ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 4104ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 4105ac27a0ecSDave Kleikamp }; 4106ac27a0ecSDave Kleikamp 4107617ba13bSMingming Cao static int __init init_ext4_fs(void) 4108ac27a0ecSDave Kleikamp { 4109c9de560dSAlex Tomas int err; 4110c9de560dSAlex Tomas 41116fd058f7STheodore Ts'o err = init_ext4_system_zone(); 41126fd058f7STheodore Ts'o if (err) 41136fd058f7STheodore Ts'o return err; 41143197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 41153197ebdbSTheodore Ts'o if (!ext4_kset) 41166fd058f7STheodore Ts'o goto out4; 41179f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 4118c9de560dSAlex Tomas err = init_ext4_mballoc(); 4119ac27a0ecSDave Kleikamp if (err) 41206fd058f7STheodore Ts'o goto out3; 4121c9de560dSAlex Tomas 4122c9de560dSAlex Tomas err = init_ext4_xattr(); 4123c9de560dSAlex Tomas if (err) 4124c9de560dSAlex Tomas goto out2; 4125ac27a0ecSDave Kleikamp err = init_inodecache(); 4126ac27a0ecSDave Kleikamp if (err) 4127ac27a0ecSDave Kleikamp goto out1; 412824b58424STheodore Ts'o register_as_ext2(); 412924b58424STheodore Ts'o register_as_ext3(); 413003010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 4131ac27a0ecSDave Kleikamp if (err) 4132ac27a0ecSDave Kleikamp goto out; 4133ac27a0ecSDave Kleikamp return 0; 4134ac27a0ecSDave Kleikamp out: 413524b58424STheodore Ts'o unregister_as_ext2(); 413624b58424STheodore Ts'o unregister_as_ext3(); 4137ac27a0ecSDave Kleikamp destroy_inodecache(); 4138ac27a0ecSDave Kleikamp out1: 4139617ba13bSMingming Cao exit_ext4_xattr(); 4140c9de560dSAlex Tomas out2: 4141c9de560dSAlex Tomas exit_ext4_mballoc(); 41426fd058f7STheodore Ts'o out3: 41436fd058f7STheodore Ts'o remove_proc_entry("fs/ext4", NULL); 41446fd058f7STheodore Ts'o kset_unregister(ext4_kset); 41456fd058f7STheodore Ts'o out4: 41466fd058f7STheodore Ts'o exit_ext4_system_zone(); 4147ac27a0ecSDave Kleikamp return err; 4148ac27a0ecSDave Kleikamp } 4149ac27a0ecSDave Kleikamp 4150617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 4151ac27a0ecSDave Kleikamp { 415224b58424STheodore Ts'o unregister_as_ext2(); 415324b58424STheodore Ts'o unregister_as_ext3(); 415403010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 4155ac27a0ecSDave Kleikamp destroy_inodecache(); 4156617ba13bSMingming Cao exit_ext4_xattr(); 4157c9de560dSAlex Tomas exit_ext4_mballoc(); 41589f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 41593197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 41606fd058f7STheodore Ts'o exit_ext4_system_zone(); 4161ac27a0ecSDave Kleikamp } 4162ac27a0ecSDave Kleikamp 4163ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 416483982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 4165ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 4166617ba13bSMingming Cao module_init(init_ext4_fs) 4167617ba13bSMingming Cao module_exit(exit_ext4_fs) 4168