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 305*d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain 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 336617ba13bSMingming Cao 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 453617ba13bSMingming Cao 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 51046e665e9SHarvey Harrison ext4_warning(sb, __func__, 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 7118d5d02e6SMingming Cao INIT_LIST_HEAD(&ei->i_aio_dio_complete_list); 7128d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 713b436b9beSJan Kara ei->i_sync_tid = 0; 714b436b9beSJan Kara ei->i_datasync_tid = 0; 7150b8e58a1SAndreas Dilger 716ac27a0ecSDave Kleikamp return &ei->vfs_inode; 717ac27a0ecSDave Kleikamp } 718ac27a0ecSDave Kleikamp 719617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 720ac27a0ecSDave Kleikamp { 7219f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 722b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 723b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 724b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 7259f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 7269f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 7279f7dd93dSVasily Averin true); 7289f7dd93dSVasily Averin dump_stack(); 7299f7dd93dSVasily Averin } 730617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 731ac27a0ecSDave Kleikamp } 732ac27a0ecSDave Kleikamp 73351cc5068SAlexey Dobriyan static void init_once(void *foo) 734ac27a0ecSDave Kleikamp { 735617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 736ac27a0ecSDave Kleikamp 737ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 73803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 739ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 740ac27a0ecSDave Kleikamp #endif 7410e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 742ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 743ac27a0ecSDave Kleikamp } 744ac27a0ecSDave Kleikamp 745ac27a0ecSDave Kleikamp static int init_inodecache(void) 746ac27a0ecSDave Kleikamp { 747617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 748617ba13bSMingming Cao sizeof(struct ext4_inode_info), 749ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 750ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 75120c2df83SPaul Mundt init_once); 752617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 753ac27a0ecSDave Kleikamp return -ENOMEM; 754ac27a0ecSDave Kleikamp return 0; 755ac27a0ecSDave Kleikamp } 756ac27a0ecSDave Kleikamp 757ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 758ac27a0ecSDave Kleikamp { 759617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 760ac27a0ecSDave Kleikamp } 761ac27a0ecSDave Kleikamp 762617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 763ac27a0ecSDave Kleikamp { 764c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 7650390131bSFrank Mayhar if (EXT4_JOURNAL(inode)) 766678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 767678aaf48SJan Kara &EXT4_I(inode)->jinode); 768ac27a0ecSDave Kleikamp } 769ac27a0ecSDave Kleikamp 7702b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 7712b2d6d01STheodore Ts'o struct super_block *sb) 772ac27a0ecSDave Kleikamp { 773ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 774617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 775ac27a0ecSDave Kleikamp 7765a20bdfcSJan Kara if (sbi->s_jquota_fmt) { 7775a20bdfcSJan Kara char *fmtname = ""; 7785a20bdfcSJan Kara 7795a20bdfcSJan Kara switch (sbi->s_jquota_fmt) { 7805a20bdfcSJan Kara case QFMT_VFS_OLD: 7815a20bdfcSJan Kara fmtname = "vfsold"; 7825a20bdfcSJan Kara break; 7835a20bdfcSJan Kara case QFMT_VFS_V0: 7845a20bdfcSJan Kara fmtname = "vfsv0"; 7855a20bdfcSJan Kara break; 7865a20bdfcSJan Kara case QFMT_VFS_V1: 7875a20bdfcSJan Kara fmtname = "vfsv1"; 7885a20bdfcSJan Kara break; 7895a20bdfcSJan Kara } 7905a20bdfcSJan Kara seq_printf(seq, ",jqfmt=%s", fmtname); 7915a20bdfcSJan Kara } 792ac27a0ecSDave Kleikamp 793ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 794ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 795ac27a0ecSDave Kleikamp 796ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 797ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 798ac27a0ecSDave Kleikamp 799617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) 800ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 801ac27a0ecSDave Kleikamp 802617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) 803ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 804ac27a0ecSDave Kleikamp #endif 805ac27a0ecSDave Kleikamp } 806ac27a0ecSDave Kleikamp 807d9c9bef1SMiklos Szeredi /* 808d9c9bef1SMiklos Szeredi * Show an option if 809d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 810d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 811d9c9bef1SMiklos Szeredi */ 812617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 813ac27a0ecSDave Kleikamp { 814aa22df2cSAneesh Kumar K.V int def_errors; 815aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 816ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 817d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 818d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 819d9c9bef1SMiklos Szeredi 820d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 821aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 822d9c9bef1SMiklos Szeredi 823d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 824d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 825d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 826d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 827aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 828d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 829d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 830d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 831d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 832d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 833d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 834d9c9bef1SMiklos Szeredi } 835d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 836d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 837d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 838d9c9bef1SMiklos Szeredi } 839bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 840d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 841bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 842d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 843bb4f397aSAneesh Kumar K.V } 844bb4f397aSAneesh Kumar K.V } 845aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 846bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 847aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 848d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 849aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 850d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 851aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 852d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 853d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 854d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 85503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 856aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 857aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 858d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 859d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 860d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 861d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 862d9c9bef1SMiklos Szeredi } 863d9c9bef1SMiklos Szeredi #endif 86403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 865aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 866d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 867d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 868d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 869d9c9bef1SMiklos Szeredi #endif 87030773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 871d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 872d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 873d9c9bef1SMiklos Szeredi } 87430773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 87530773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 87630773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 87730773840STheodore Ts'o } 87830773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 87930773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 88030773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 88130773840STheodore Ts'o } 88230773840STheodore Ts'o 883571640caSEric Sandeen /* 884571640caSEric Sandeen * We're changing the default of barrier mount option, so 885571640caSEric Sandeen * let's always display its mount state so it's clear what its 886571640caSEric Sandeen * status is. 887571640caSEric Sandeen */ 888571640caSEric Sandeen seq_puts(seq, ",barrier="); 889571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 890cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 891cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 892d9c9bef1SMiklos Szeredi if (test_opt(sb, NOBH)) 893d9c9bef1SMiklos Szeredi seq_puts(seq, ",nobh"); 89425ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 89525ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 896dd919b98SAneesh Kumar K.V if (!test_opt(sb, DELALLOC)) 897dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 898dd919b98SAneesh Kumar K.V 899ac27a0ecSDave Kleikamp 900cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 901cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 902aa22df2cSAneesh Kumar K.V /* 903aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 904aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 905aa22df2cSAneesh Kumar K.V */ 906617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 907ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 908617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 909ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 910617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 911ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 912ac27a0ecSDave Kleikamp 913240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 914240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 915240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 916240799cdSTheodore Ts'o 9175bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 9185bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 9195bf5683aSHidehiro Kawai 920afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 92106705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 922afd4672dSTheodore Ts'o 9235328e635SEric Sandeen if (test_opt(sb, DISCARD)) 9245328e635SEric Sandeen seq_puts(seq, ",discard"); 9255328e635SEric Sandeen 926e3bb52aeSEric Sandeen if (test_opt(sb, NOLOAD)) 927e3bb52aeSEric Sandeen seq_puts(seq, ",norecovery"); 928e3bb52aeSEric Sandeen 929617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 9300b8e58a1SAndreas Dilger 931ac27a0ecSDave Kleikamp return 0; 932ac27a0ecSDave Kleikamp } 933ac27a0ecSDave Kleikamp 9341b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 9351b961ac0SChristoph Hellwig u64 ino, u32 generation) 936ac27a0ecSDave Kleikamp { 937ac27a0ecSDave Kleikamp struct inode *inode; 938ac27a0ecSDave Kleikamp 939617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 940ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 941617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 942ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 943ac27a0ecSDave Kleikamp 944ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 945ac27a0ecSDave Kleikamp * 946617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 947ac27a0ecSDave Kleikamp * deleted, so we should be safe. 948ac27a0ecSDave Kleikamp * 949ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 950ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 951ac27a0ecSDave Kleikamp */ 9521d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 9531d1fe1eeSDavid Howells if (IS_ERR(inode)) 9541d1fe1eeSDavid Howells return ERR_CAST(inode); 9551d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 956ac27a0ecSDave Kleikamp iput(inode); 957ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 958ac27a0ecSDave Kleikamp } 9591b961ac0SChristoph Hellwig 9601b961ac0SChristoph Hellwig return inode; 961ac27a0ecSDave Kleikamp } 9621b961ac0SChristoph Hellwig 9631b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 9641b961ac0SChristoph Hellwig int fh_len, int fh_type) 9651b961ac0SChristoph Hellwig { 9661b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 9671b961ac0SChristoph Hellwig ext4_nfs_get_inode); 9681b961ac0SChristoph Hellwig } 9691b961ac0SChristoph Hellwig 9701b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 9711b961ac0SChristoph Hellwig int fh_len, int fh_type) 9721b961ac0SChristoph Hellwig { 9731b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 9741b961ac0SChristoph Hellwig ext4_nfs_get_inode); 975ac27a0ecSDave Kleikamp } 976ac27a0ecSDave Kleikamp 977c39a7f84SToshiyuki Okajima /* 978c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 979c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 980c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 981c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 982c39a7f84SToshiyuki Okajima */ 9830b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 9840b8e58a1SAndreas Dilger gfp_t wait) 985c39a7f84SToshiyuki Okajima { 986c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 987c39a7f84SToshiyuki Okajima 988c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 989c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 990c39a7f84SToshiyuki Okajima return 0; 991c39a7f84SToshiyuki Okajima if (journal) 992c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 993c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 994c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 995c39a7f84SToshiyuki Okajima } 996c39a7f84SToshiyuki Okajima 997ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 998ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 999ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1000ac27a0ecSDave Kleikamp 1001617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1002617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1003617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1004617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1005617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 10066f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 10076f28e087SJan Kara char *path, int remount); 1008617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1009617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1010ac27a0ecSDave Kleikamp size_t len, loff_t off); 1011617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1012ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1013ac27a0ecSDave Kleikamp 101461e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 1015edf72453SJan Kara .initialize = dquot_initialize, 1016edf72453SJan Kara .drop = dquot_drop, 1017ac27a0ecSDave Kleikamp .alloc_space = dquot_alloc_space, 101860e58e0fSMingming Cao .reserve_space = dquot_reserve_space, 101960e58e0fSMingming Cao .claim_space = dquot_claim_space, 102060e58e0fSMingming Cao .release_rsv = dquot_release_reserved_space, 1021a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 102260e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1023a9e7f447SDmitry Monakhov #endif 1024ac27a0ecSDave Kleikamp .alloc_inode = dquot_alloc_inode, 1025ac27a0ecSDave Kleikamp .free_space = dquot_free_space, 1026ac27a0ecSDave Kleikamp .free_inode = dquot_free_inode, 1027ac27a0ecSDave Kleikamp .transfer = dquot_transfer, 1028617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1029617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1030617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1031617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1032a5b5ee32SJan Kara .write_info = ext4_write_info, 1033a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1034a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1035ac27a0ecSDave Kleikamp }; 1036ac27a0ecSDave Kleikamp 10370d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1038617ba13bSMingming Cao .quota_on = ext4_quota_on, 1039ac27a0ecSDave Kleikamp .quota_off = vfs_quota_off, 1040ac27a0ecSDave Kleikamp .quota_sync = vfs_quota_sync, 1041ac27a0ecSDave Kleikamp .get_info = vfs_get_dqinfo, 1042ac27a0ecSDave Kleikamp .set_info = vfs_set_dqinfo, 1043ac27a0ecSDave Kleikamp .get_dqblk = vfs_get_dqblk, 1044ac27a0ecSDave Kleikamp .set_dqblk = vfs_set_dqblk 1045ac27a0ecSDave Kleikamp }; 1046ac27a0ecSDave Kleikamp #endif 1047ac27a0ecSDave Kleikamp 1048ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1049617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1050617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1051617ba13bSMingming Cao .write_inode = ext4_write_inode, 1052617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 1053617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 1054617ba13bSMingming Cao .put_super = ext4_put_super, 1055617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1056c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1057c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1058617ba13bSMingming Cao .statfs = ext4_statfs, 1059617ba13bSMingming Cao .remount_fs = ext4_remount, 1060617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 1061617ba13bSMingming Cao .show_options = ext4_show_options, 1062ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1063617ba13bSMingming Cao .quota_read = ext4_quota_read, 1064617ba13bSMingming Cao .quota_write = ext4_quota_write, 1065ac27a0ecSDave Kleikamp #endif 1066c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1067ac27a0ecSDave Kleikamp }; 1068ac27a0ecSDave Kleikamp 10699ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 10709ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 10719ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 10729ca92389STheodore Ts'o .write_inode = ext4_write_inode, 10739ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 10749ca92389STheodore Ts'o .delete_inode = ext4_delete_inode, 10759ca92389STheodore Ts'o .write_super = ext4_write_super, 10769ca92389STheodore Ts'o .put_super = ext4_put_super, 10779ca92389STheodore Ts'o .statfs = ext4_statfs, 10789ca92389STheodore Ts'o .remount_fs = ext4_remount, 10799ca92389STheodore Ts'o .clear_inode = ext4_clear_inode, 10809ca92389STheodore Ts'o .show_options = ext4_show_options, 10819ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 10829ca92389STheodore Ts'o .quota_read = ext4_quota_read, 10839ca92389STheodore Ts'o .quota_write = ext4_quota_write, 10849ca92389STheodore Ts'o #endif 10859ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 10869ca92389STheodore Ts'o }; 10879ca92389STheodore Ts'o 108839655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 10891b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 10901b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1091617ba13bSMingming Cao .get_parent = ext4_get_parent, 1092ac27a0ecSDave Kleikamp }; 1093ac27a0ecSDave Kleikamp 1094ac27a0ecSDave Kleikamp enum { 1095ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1096ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 109701436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1098ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 109906705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 110030773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1101c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1102818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1103ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1104296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1105ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11065a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 11075a20bdfcSJan Kara Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, 11085a20bdfcSJan Kara Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, 110901436ef2STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, 11106fd058f7STheodore Ts'o Opt_block_validity, Opt_noblock_validity, 11115328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 11125328e635SEric Sandeen Opt_discard, Opt_nodiscard, 1113ac27a0ecSDave Kleikamp }; 1114ac27a0ecSDave Kleikamp 1115a447c093SSteven Whitehouse static const match_table_t tokens = { 1116ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1117ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1118ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1119ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1120ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1121ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1122ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1123ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1124ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1125ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1126ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1127ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1128ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1129ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1130ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1131ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1132ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1133ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1134ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1135ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1136ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1137e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 1138ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1139ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1140ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 114130773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 114230773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1143ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1144ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1145818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1146818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1147ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1148ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1149ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1150ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 11515bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 11525bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1153ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1154ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1155ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1156ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1157ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1158ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 11595a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1160ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1161ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1162ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1163ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1164ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 116506705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 116606705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 116725ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1168c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1169ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 117064769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1171dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 11726fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 11736fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1174240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1175b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1176afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 117706705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 117806705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 11795328e635SEric Sandeen {Opt_discard, "discard"}, 11805328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1181f3f12faaSJosef Bacik {Opt_err, NULL}, 1182ac27a0ecSDave Kleikamp }; 1183ac27a0ecSDave Kleikamp 1184617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1185ac27a0ecSDave Kleikamp { 1186617ba13bSMingming Cao ext4_fsblk_t sb_block; 1187ac27a0ecSDave Kleikamp char *options = (char *) *data; 1188ac27a0ecSDave Kleikamp 1189ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1190ac27a0ecSDave Kleikamp return 1; /* Default location */ 11910b8e58a1SAndreas Dilger 1192ac27a0ecSDave Kleikamp options += 3; 11930b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1194ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1195ac27a0ecSDave Kleikamp if (*options && *options != ',') { 11964776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1197ac27a0ecSDave Kleikamp (char *) *data); 1198ac27a0ecSDave Kleikamp return 1; 1199ac27a0ecSDave Kleikamp } 1200ac27a0ecSDave Kleikamp if (*options == ',') 1201ac27a0ecSDave Kleikamp options++; 1202ac27a0ecSDave Kleikamp *data = (void *) options; 12030b8e58a1SAndreas Dilger 1204ac27a0ecSDave Kleikamp return sb_block; 1205ac27a0ecSDave Kleikamp } 1206ac27a0ecSDave Kleikamp 1207b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1208b3881f74STheodore Ts'o 1209ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1210c3191067STheodore Ts'o unsigned long *journal_devnum, 1211b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1212617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1213ac27a0ecSDave Kleikamp { 1214617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1215ac27a0ecSDave Kleikamp char *p; 1216ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1217ac27a0ecSDave Kleikamp int data_opt = 0; 1218ac27a0ecSDave Kleikamp int option; 1219ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1220dfc5d03fSJan Kara int qtype, qfmt; 1221ac27a0ecSDave Kleikamp char *qname; 1222ac27a0ecSDave Kleikamp #endif 1223ac27a0ecSDave Kleikamp 1224ac27a0ecSDave Kleikamp if (!options) 1225ac27a0ecSDave Kleikamp return 1; 1226ac27a0ecSDave Kleikamp 1227ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1228ac27a0ecSDave Kleikamp int token; 1229ac27a0ecSDave Kleikamp if (!*p) 1230ac27a0ecSDave Kleikamp continue; 1231ac27a0ecSDave Kleikamp 1232ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1233ac27a0ecSDave Kleikamp switch (token) { 1234ac27a0ecSDave Kleikamp case Opt_bsd_df: 1235ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, MINIX_DF); 1236ac27a0ecSDave Kleikamp break; 1237ac27a0ecSDave Kleikamp case Opt_minix_df: 1238ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, MINIX_DF); 1239ac27a0ecSDave Kleikamp break; 1240ac27a0ecSDave Kleikamp case Opt_grpid: 1241ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1242ac27a0ecSDave Kleikamp break; 1243ac27a0ecSDave Kleikamp case Opt_nogrpid: 1244ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPID); 1245ac27a0ecSDave Kleikamp break; 1246ac27a0ecSDave Kleikamp case Opt_resuid: 1247ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1248ac27a0ecSDave Kleikamp return 0; 1249ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1250ac27a0ecSDave Kleikamp break; 1251ac27a0ecSDave Kleikamp case Opt_resgid: 1252ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1253ac27a0ecSDave Kleikamp return 0; 1254ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1255ac27a0ecSDave Kleikamp break; 1256ac27a0ecSDave Kleikamp case Opt_sb: 1257ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1258ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1259ac27a0ecSDave Kleikamp break; 1260ac27a0ecSDave Kleikamp case Opt_err_panic: 1261ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1262ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1263ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1264ac27a0ecSDave Kleikamp break; 1265ac27a0ecSDave Kleikamp case Opt_err_ro: 1266ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1267ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1268ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1269ac27a0ecSDave Kleikamp break; 1270ac27a0ecSDave Kleikamp case Opt_err_cont: 1271ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1272ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1273ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_CONT); 1274ac27a0ecSDave Kleikamp break; 1275ac27a0ecSDave Kleikamp case Opt_nouid32: 1276ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 1277ac27a0ecSDave Kleikamp break; 1278ac27a0ecSDave Kleikamp case Opt_debug: 1279ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1280ac27a0ecSDave Kleikamp break; 1281ac27a0ecSDave Kleikamp case Opt_oldalloc: 1282ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, OLDALLOC); 1283ac27a0ecSDave Kleikamp break; 1284ac27a0ecSDave Kleikamp case Opt_orlov: 1285ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, OLDALLOC); 1286ac27a0ecSDave Kleikamp break; 128703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1288ac27a0ecSDave Kleikamp case Opt_user_xattr: 1289ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 1290ac27a0ecSDave Kleikamp break; 1291ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1292ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, XATTR_USER); 1293ac27a0ecSDave Kleikamp break; 1294ac27a0ecSDave Kleikamp #else 1295ac27a0ecSDave Kleikamp case Opt_user_xattr: 1296ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1297b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1298ac27a0ecSDave Kleikamp break; 1299ac27a0ecSDave Kleikamp #endif 130003010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1301ac27a0ecSDave Kleikamp case Opt_acl: 1302ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1303ac27a0ecSDave Kleikamp break; 1304ac27a0ecSDave Kleikamp case Opt_noacl: 1305ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1306ac27a0ecSDave Kleikamp break; 1307ac27a0ecSDave Kleikamp #else 1308ac27a0ecSDave Kleikamp case Opt_acl: 1309ac27a0ecSDave Kleikamp case Opt_noacl: 1310b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1311ac27a0ecSDave Kleikamp break; 1312ac27a0ecSDave Kleikamp #endif 1313ac27a0ecSDave Kleikamp case Opt_journal_update: 1314ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1315ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1316ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1317ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1318ac27a0ecSDave Kleikamp journal file. */ 1319ac27a0ecSDave Kleikamp if (is_remount) { 1320b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1321b31e1552SEric Sandeen "Cannot specify journal on remount"); 1322ac27a0ecSDave Kleikamp return 0; 1323ac27a0ecSDave Kleikamp } 1324ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); 1325ac27a0ecSDave Kleikamp break; 1326ac27a0ecSDave Kleikamp case Opt_journal_dev: 1327ac27a0ecSDave Kleikamp if (is_remount) { 1328b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1329b31e1552SEric Sandeen "Cannot specify journal on remount"); 1330ac27a0ecSDave Kleikamp return 0; 1331ac27a0ecSDave Kleikamp } 1332ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1333ac27a0ecSDave Kleikamp return 0; 1334ac27a0ecSDave Kleikamp *journal_devnum = option; 1335ac27a0ecSDave Kleikamp break; 1336818d276cSGirish Shilamkar case Opt_journal_checksum: 1337d4da6c9cSLinus Torvalds set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1338d4da6c9cSLinus Torvalds break; 1339818d276cSGirish Shilamkar case Opt_journal_async_commit: 1340818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1341d4da6c9cSLinus Torvalds set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1342818d276cSGirish Shilamkar break; 1343ac27a0ecSDave Kleikamp case Opt_noload: 1344ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOLOAD); 1345ac27a0ecSDave Kleikamp break; 1346ac27a0ecSDave Kleikamp case Opt_commit: 1347ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1348ac27a0ecSDave Kleikamp return 0; 1349ac27a0ecSDave Kleikamp if (option < 0) 1350ac27a0ecSDave Kleikamp return 0; 1351ac27a0ecSDave Kleikamp if (option == 0) 1352cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1353ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1354ac27a0ecSDave Kleikamp break; 135530773840STheodore Ts'o case Opt_max_batch_time: 135630773840STheodore Ts'o if (match_int(&args[0], &option)) 135730773840STheodore Ts'o return 0; 135830773840STheodore Ts'o if (option < 0) 135930773840STheodore Ts'o return 0; 136030773840STheodore Ts'o if (option == 0) 136130773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 136230773840STheodore Ts'o sbi->s_max_batch_time = option; 136330773840STheodore Ts'o break; 136430773840STheodore Ts'o case Opt_min_batch_time: 136530773840STheodore Ts'o if (match_int(&args[0], &option)) 136630773840STheodore Ts'o return 0; 136730773840STheodore Ts'o if (option < 0) 136830773840STheodore Ts'o return 0; 136930773840STheodore Ts'o sbi->s_min_batch_time = option; 137030773840STheodore Ts'o break; 1371ac27a0ecSDave Kleikamp case Opt_data_journal: 1372617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1373ac27a0ecSDave Kleikamp goto datacheck; 1374ac27a0ecSDave Kleikamp case Opt_data_ordered: 1375617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1376ac27a0ecSDave Kleikamp goto datacheck; 1377ac27a0ecSDave Kleikamp case Opt_data_writeback: 1378617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1379ac27a0ecSDave Kleikamp datacheck: 1380ac27a0ecSDave Kleikamp if (is_remount) { 1381617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) 1382ac27a0ecSDave Kleikamp != data_opt) { 1383b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1384b31e1552SEric Sandeen "Cannot change data mode on remount"); 1385ac27a0ecSDave Kleikamp return 0; 1386ac27a0ecSDave Kleikamp } 1387ac27a0ecSDave Kleikamp } else { 1388617ba13bSMingming Cao sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; 1389ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1390ac27a0ecSDave Kleikamp } 1391ac27a0ecSDave Kleikamp break; 13925bf5683aSHidehiro Kawai case Opt_data_err_abort: 13935bf5683aSHidehiro Kawai set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 13945bf5683aSHidehiro Kawai break; 13955bf5683aSHidehiro Kawai case Opt_data_err_ignore: 13965bf5683aSHidehiro Kawai clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 13975bf5683aSHidehiro Kawai break; 1398ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1399ac27a0ecSDave Kleikamp case Opt_usrjquota: 1400ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1401ac27a0ecSDave Kleikamp goto set_qf_name; 1402ac27a0ecSDave Kleikamp case Opt_grpjquota: 1403ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1404ac27a0ecSDave Kleikamp set_qf_name: 140517bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1406dfc5d03fSJan Kara !sbi->s_qf_names[qtype]) { 1407b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1408b31e1552SEric Sandeen "Cannot change journaled " 1409b31e1552SEric Sandeen "quota options when quota turned on"); 1410ac27a0ecSDave Kleikamp return 0; 1411ac27a0ecSDave Kleikamp } 1412ac27a0ecSDave Kleikamp qname = match_strdup(&args[0]); 1413ac27a0ecSDave Kleikamp if (!qname) { 1414b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1415b31e1552SEric Sandeen "Not enough memory for " 1416b31e1552SEric Sandeen "storing quotafile name"); 1417ac27a0ecSDave Kleikamp return 0; 1418ac27a0ecSDave Kleikamp } 1419ac27a0ecSDave Kleikamp if (sbi->s_qf_names[qtype] && 1420ac27a0ecSDave Kleikamp strcmp(sbi->s_qf_names[qtype], qname)) { 1421b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1422b31e1552SEric Sandeen "%s quota file already " 1423b31e1552SEric Sandeen "specified", QTYPE2NAME(qtype)); 1424ac27a0ecSDave Kleikamp kfree(qname); 1425ac27a0ecSDave Kleikamp return 0; 1426ac27a0ecSDave Kleikamp } 1427ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = qname; 1428ac27a0ecSDave Kleikamp if (strchr(sbi->s_qf_names[qtype], '/')) { 1429b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1430b31e1552SEric Sandeen "quotafile must be on " 1431b31e1552SEric Sandeen "filesystem root"); 1432ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[qtype]); 1433ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1434ac27a0ecSDave Kleikamp return 0; 1435ac27a0ecSDave Kleikamp } 1436ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1437ac27a0ecSDave Kleikamp break; 1438ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1439ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1440ac27a0ecSDave Kleikamp goto clear_qf_name; 1441ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1442ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1443ac27a0ecSDave Kleikamp clear_qf_name: 144417bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1445dfc5d03fSJan Kara sbi->s_qf_names[qtype]) { 1446b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 14472c8be6b2SJan Kara "journaled quota options when " 1448b31e1552SEric Sandeen "quota turned on"); 1449ac27a0ecSDave Kleikamp return 0; 1450ac27a0ecSDave Kleikamp } 1451ac27a0ecSDave Kleikamp /* 1452ac27a0ecSDave Kleikamp * The space will be released later when all options 1453ac27a0ecSDave Kleikamp * are confirmed to be correct 1454ac27a0ecSDave Kleikamp */ 1455ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1456ac27a0ecSDave Kleikamp break; 1457ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1458dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1459dfc5d03fSJan Kara goto set_qf_format; 1460ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1461dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 14625a20bdfcSJan Kara goto set_qf_format; 14635a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 14645a20bdfcSJan Kara qfmt = QFMT_VFS_V1; 1465dfc5d03fSJan Kara set_qf_format: 146617bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1467dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1468b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1469dfc5d03fSJan Kara "journaled quota options when " 1470b31e1552SEric Sandeen "quota turned on"); 1471dfc5d03fSJan Kara return 0; 1472dfc5d03fSJan Kara } 1473dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1474ac27a0ecSDave Kleikamp break; 1475ac27a0ecSDave Kleikamp case Opt_quota: 1476ac27a0ecSDave Kleikamp case Opt_usrquota: 1477ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1478ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1479ac27a0ecSDave Kleikamp break; 1480ac27a0ecSDave Kleikamp case Opt_grpquota: 1481ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1482ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1483ac27a0ecSDave Kleikamp break; 1484ac27a0ecSDave Kleikamp case Opt_noquota: 148517bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1486b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1487b31e1552SEric Sandeen "options when quota turned on"); 1488ac27a0ecSDave Kleikamp return 0; 1489ac27a0ecSDave Kleikamp } 1490ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1491ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1492ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1493ac27a0ecSDave Kleikamp break; 1494ac27a0ecSDave Kleikamp #else 1495ac27a0ecSDave Kleikamp case Opt_quota: 1496ac27a0ecSDave Kleikamp case Opt_usrquota: 1497ac27a0ecSDave Kleikamp case Opt_grpquota: 1498b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1499b31e1552SEric Sandeen "quota options not supported"); 1500cd59e7b9SJan Kara break; 1501ac27a0ecSDave Kleikamp case Opt_usrjquota: 1502ac27a0ecSDave Kleikamp case Opt_grpjquota: 1503ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1504ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1505ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1506ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 15075a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 1508b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1509b31e1552SEric Sandeen "journaled quota options not supported"); 1510ac27a0ecSDave Kleikamp break; 1511ac27a0ecSDave Kleikamp case Opt_noquota: 1512ac27a0ecSDave Kleikamp break; 1513ac27a0ecSDave Kleikamp #endif 1514ac27a0ecSDave Kleikamp case Opt_abort: 15154ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1516ac27a0ecSDave Kleikamp break; 151706705bffSTheodore Ts'o case Opt_nobarrier: 151806705bffSTheodore Ts'o clear_opt(sbi->s_mount_opt, BARRIER); 151906705bffSTheodore Ts'o break; 1520ac27a0ecSDave Kleikamp case Opt_barrier: 152106705bffSTheodore Ts'o if (match_int(&args[0], &option)) { 152206705bffSTheodore Ts'o set_opt(sbi->s_mount_opt, BARRIER); 152306705bffSTheodore Ts'o break; 152406705bffSTheodore Ts'o } 1525ac27a0ecSDave Kleikamp if (option) 1526ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1527ac27a0ecSDave Kleikamp else 1528ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1529ac27a0ecSDave Kleikamp break; 1530ac27a0ecSDave Kleikamp case Opt_ignore: 1531ac27a0ecSDave Kleikamp break; 1532ac27a0ecSDave Kleikamp case Opt_resize: 1533ac27a0ecSDave Kleikamp if (!is_remount) { 1534b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1535b31e1552SEric Sandeen "resize option only available " 1536b31e1552SEric Sandeen "for remount"); 1537ac27a0ecSDave Kleikamp return 0; 1538ac27a0ecSDave Kleikamp } 1539ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1540ac27a0ecSDave Kleikamp return 0; 1541ac27a0ecSDave Kleikamp *n_blocks_count = option; 1542ac27a0ecSDave Kleikamp break; 1543ac27a0ecSDave Kleikamp case Opt_nobh: 1544ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1545ac27a0ecSDave Kleikamp break; 1546ac27a0ecSDave Kleikamp case Opt_bh: 1547ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1548ac27a0ecSDave Kleikamp break; 154925ec56b5SJean Noel Cordenner case Opt_i_version: 155025ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 155125ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 155225ec56b5SJean Noel Cordenner break; 1553dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1554dd919b98SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 1555dd919b98SAneesh Kumar K.V break; 1556c9de560dSAlex Tomas case Opt_stripe: 1557c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1558c9de560dSAlex Tomas return 0; 1559c9de560dSAlex Tomas if (option < 0) 1560c9de560dSAlex Tomas return 0; 1561c9de560dSAlex Tomas sbi->s_stripe = option; 1562c9de560dSAlex Tomas break; 156364769240SAlex Tomas case Opt_delalloc: 156464769240SAlex Tomas set_opt(sbi->s_mount_opt, DELALLOC); 156564769240SAlex Tomas break; 15666fd058f7STheodore Ts'o case Opt_block_validity: 15676fd058f7STheodore Ts'o set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 15686fd058f7STheodore Ts'o break; 15696fd058f7STheodore Ts'o case Opt_noblock_validity: 15706fd058f7STheodore Ts'o clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 15716fd058f7STheodore Ts'o break; 1572240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1573240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1574240799cdSTheodore Ts'o return 0; 1575240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1576240799cdSTheodore Ts'o return 0; 1577f7c43950STheodore Ts'o if (!is_power_of_2(option)) { 1578b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1579b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1580b31e1552SEric Sandeen " must be a power of 2"); 15813197ebdbSTheodore Ts'o return 0; 15823197ebdbSTheodore Ts'o } 1583240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1584240799cdSTheodore Ts'o break; 1585b3881f74STheodore Ts'o case Opt_journal_ioprio: 1586b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1587b3881f74STheodore Ts'o return 0; 1588b3881f74STheodore Ts'o if (option < 0 || option > 7) 1589b3881f74STheodore Ts'o break; 1590b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1591b3881f74STheodore Ts'o option); 1592b3881f74STheodore Ts'o break; 159306705bffSTheodore Ts'o case Opt_noauto_da_alloc: 159406705bffSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 159506705bffSTheodore Ts'o break; 1596afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 159706705bffSTheodore Ts'o if (match_int(&args[0], &option)) { 159806705bffSTheodore Ts'o clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); 159906705bffSTheodore Ts'o break; 160006705bffSTheodore Ts'o } 1601afd4672dSTheodore Ts'o if (option) 1602afd4672dSTheodore Ts'o clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); 1603afd4672dSTheodore Ts'o else 1604afd4672dSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 1605afd4672dSTheodore Ts'o break; 16065328e635SEric Sandeen case Opt_discard: 16075328e635SEric Sandeen set_opt(sbi->s_mount_opt, DISCARD); 16085328e635SEric Sandeen break; 16095328e635SEric Sandeen case Opt_nodiscard: 16105328e635SEric Sandeen clear_opt(sbi->s_mount_opt, DISCARD); 16115328e635SEric Sandeen break; 1612ac27a0ecSDave Kleikamp default: 1613b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1614b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1615b31e1552SEric Sandeen "or missing value", p); 1616ac27a0ecSDave Kleikamp return 0; 1617ac27a0ecSDave Kleikamp } 1618ac27a0ecSDave Kleikamp } 1619ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1620ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1621617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && 1622ac27a0ecSDave Kleikamp sbi->s_qf_names[USRQUOTA]) 1623ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1624ac27a0ecSDave Kleikamp 1625617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && 1626ac27a0ecSDave Kleikamp sbi->s_qf_names[GRPQUOTA]) 1627ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1628ac27a0ecSDave Kleikamp 1629ac27a0ecSDave Kleikamp if ((sbi->s_qf_names[USRQUOTA] && 1630617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || 1631ac27a0ecSDave Kleikamp (sbi->s_qf_names[GRPQUOTA] && 1632617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { 1633b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1634b31e1552SEric Sandeen "format mixing"); 1635ac27a0ecSDave Kleikamp return 0; 1636ac27a0ecSDave Kleikamp } 1637ac27a0ecSDave Kleikamp 1638ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1639b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1640b31e1552SEric Sandeen "not specified"); 1641ac27a0ecSDave Kleikamp return 0; 1642ac27a0ecSDave Kleikamp } 1643ac27a0ecSDave Kleikamp } else { 1644ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1645b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 16462c8be6b2SJan Kara "specified with no journaling " 1647b31e1552SEric Sandeen "enabled"); 1648ac27a0ecSDave Kleikamp return 0; 1649ac27a0ecSDave Kleikamp } 1650ac27a0ecSDave Kleikamp } 1651ac27a0ecSDave Kleikamp #endif 1652ac27a0ecSDave Kleikamp return 1; 1653ac27a0ecSDave Kleikamp } 1654ac27a0ecSDave Kleikamp 1655617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1656ac27a0ecSDave Kleikamp int read_only) 1657ac27a0ecSDave Kleikamp { 1658617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1659ac27a0ecSDave Kleikamp int res = 0; 1660ac27a0ecSDave Kleikamp 1661617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1662b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1663b31e1552SEric Sandeen "forcing read-only mode"); 1664ac27a0ecSDave Kleikamp res = MS_RDONLY; 1665ac27a0ecSDave Kleikamp } 1666ac27a0ecSDave Kleikamp if (read_only) 1667ac27a0ecSDave Kleikamp return res; 1668617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1669b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1670b31e1552SEric Sandeen "running e2fsck is recommended"); 1671617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1672b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1673b31e1552SEric Sandeen "warning: mounting fs with errors, " 1674b31e1552SEric Sandeen "running e2fsck is recommended"); 1675ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1676ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1677ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1678b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1679b31e1552SEric Sandeen "warning: maximal mount count reached, " 1680b31e1552SEric Sandeen "running e2fsck is recommended"); 1681ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1682ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1683ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1684b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1685b31e1552SEric Sandeen "warning: checktime reached, " 1686b31e1552SEric Sandeen "running e2fsck is recommended"); 16870390131bSFrank Mayhar if (!sbi->s_journal) 1688216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1689ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1690617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1691e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1692ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1693617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 16940390131bSFrank Mayhar if (sbi->s_journal) 1695617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1696ac27a0ecSDave Kleikamp 1697e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1698ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1699a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 17007f4520ccSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x]\n", 1701ac27a0ecSDave Kleikamp sb->s_blocksize, 1702ac27a0ecSDave Kleikamp sbi->s_groups_count, 1703617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1704617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1705ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1706ac27a0ecSDave Kleikamp 1707ac27a0ecSDave Kleikamp return res; 1708ac27a0ecSDave Kleikamp } 1709ac27a0ecSDave Kleikamp 1710772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1711772cb7c8SJose R. Santos { 1712772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1713772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1714772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1715772cb7c8SJose R. Santos ext4_group_t flex_group; 1716772cb7c8SJose R. Santos int groups_per_flex = 0; 1717c5ca7c76STheodore Ts'o size_t size; 1718772cb7c8SJose R. Santos int i; 1719772cb7c8SJose R. Santos 1720503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1721503358aeSTheodore Ts'o groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1722503358aeSTheodore Ts'o 1723503358aeSTheodore Ts'o if (groups_per_flex < 2) { 1724772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1725772cb7c8SJose R. Santos return 1; 1726772cb7c8SJose R. Santos } 1727772cb7c8SJose R. Santos 1728c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1729c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1730d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1731d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1732c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 1733c5ca7c76STheodore Ts'o sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); 1734c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 1735c5ca7c76STheodore Ts'o sbi->s_flex_groups = vmalloc(size); 1736c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) 1737c5ca7c76STheodore Ts'o memset(sbi->s_flex_groups, 0, size); 1738c5ca7c76STheodore Ts'o } 1739772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1740b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory for " 1741b31e1552SEric Sandeen "%u flex groups", flex_group_count); 1742772cb7c8SJose R. Santos goto failed; 1743772cb7c8SJose R. Santos } 1744772cb7c8SJose R. Santos 1745772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 174688b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1747772cb7c8SJose R. Santos 1748772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 17497ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 17507ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 17517ad9bb65STheodore Ts'o atomic_add(ext4_free_blks_count(sb, gdp), 17527ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_blocks); 17537ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 17547ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1755772cb7c8SJose R. Santos } 1756772cb7c8SJose R. Santos 1757772cb7c8SJose R. Santos return 1; 1758772cb7c8SJose R. Santos failed: 1759772cb7c8SJose R. Santos return 0; 1760772cb7c8SJose R. Santos } 1761772cb7c8SJose R. Santos 1762717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1763717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1764717d50e4SAndreas Dilger { 1765717d50e4SAndreas Dilger __u16 crc = 0; 1766717d50e4SAndreas Dilger 1767717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1768717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1769717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1770717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1771717d50e4SAndreas Dilger 1772717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1773717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1774717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1775717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1776717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1777717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1778717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1779717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1780717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1781717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1782717d50e4SAndreas Dilger offset); 1783717d50e4SAndreas Dilger } 1784717d50e4SAndreas Dilger 1785717d50e4SAndreas Dilger return cpu_to_le16(crc); 1786717d50e4SAndreas Dilger } 1787717d50e4SAndreas Dilger 1788717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1789717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1790717d50e4SAndreas Dilger { 1791717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1792717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1793717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1794717d50e4SAndreas Dilger return 0; 1795717d50e4SAndreas Dilger 1796717d50e4SAndreas Dilger return 1; 1797717d50e4SAndreas Dilger } 1798717d50e4SAndreas Dilger 1799ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1800617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1801ac27a0ecSDave Kleikamp { 1802617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1803617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1804617ba13bSMingming Cao ext4_fsblk_t last_block; 1805bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1806bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1807bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1808ce421581SJose R. Santos int flexbg_flag = 0; 1809fd2d4291SAvantika Mathur ext4_group_t i; 1810ac27a0ecSDave Kleikamp 1811ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1812ce421581SJose R. Santos flexbg_flag = 1; 1813ce421581SJose R. Santos 1814617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 1815ac27a0ecSDave Kleikamp 1816197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1817197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1818197cd65aSAkinobu Mita 1819ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1820bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1821ac27a0ecSDave Kleikamp else 1822ac27a0ecSDave Kleikamp last_block = first_block + 1823617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1824ac27a0ecSDave Kleikamp 18258fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 18262b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 1827b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1828a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 1829b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 1830ac27a0ecSDave Kleikamp return 0; 1831ac27a0ecSDave Kleikamp } 18328fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 18332b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 1834b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1835a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 1836b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 1837ac27a0ecSDave Kleikamp return 0; 1838ac27a0ecSDave Kleikamp } 18398fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1840bd81d8eeSLaurent Vivier if (inode_table < first_block || 18412b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 1842b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1843a9df9a49STheodore Ts'o "Inode table for group %u not in group " 1844b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 1845ac27a0ecSDave Kleikamp return 0; 1846ac27a0ecSDave Kleikamp } 1847955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 1848717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1849b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1850b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 1851fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1852fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 18537ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 1854955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1855717d50e4SAndreas Dilger return 0; 1856717d50e4SAndreas Dilger } 18577ee1ec4cSLi Zefan } 1858955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1859ce421581SJose R. Santos if (!flexbg_flag) 1860617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 1861ac27a0ecSDave Kleikamp } 1862ac27a0ecSDave Kleikamp 1863bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1864617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 1865ac27a0ecSDave Kleikamp return 1; 1866ac27a0ecSDave Kleikamp } 1867ac27a0ecSDave Kleikamp 1868617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1869ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1870ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1871ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1872ac27a0ecSDave Kleikamp * 1873ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1874ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1875ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1876ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1877ac27a0ecSDave Kleikamp * 1878ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1879ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1880ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1881617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1882ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1883ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1884ac27a0ecSDave Kleikamp */ 1885617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 1886617ba13bSMingming Cao struct ext4_super_block *es) 1887ac27a0ecSDave Kleikamp { 1888ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1889ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1890ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1891ac27a0ecSDave Kleikamp int i; 1892ac27a0ecSDave Kleikamp #endif 1893ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1894ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1895ac27a0ecSDave Kleikamp return; 1896ac27a0ecSDave Kleikamp } 1897ac27a0ecSDave Kleikamp 1898a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1899b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 1900b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 1901a8f48a95SEric Sandeen return; 1902a8f48a95SEric Sandeen } 1903a8f48a95SEric Sandeen 1904617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1905ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1906ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1907ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1908ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1909ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1910ac27a0ecSDave Kleikamp return; 1911ac27a0ecSDave Kleikamp } 1912ac27a0ecSDave Kleikamp 1913ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1914b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 1915ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 1916ac27a0ecSDave Kleikamp } 1917ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1918ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 1919ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 1920ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 1921ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1922617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 1923617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 1924ac27a0ecSDave Kleikamp if (ret < 0) 1925b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1926b31e1552SEric Sandeen "Cannot turn on journaled " 1927b31e1552SEric Sandeen "quota: error %d", ret); 1928ac27a0ecSDave Kleikamp } 1929ac27a0ecSDave Kleikamp } 1930ac27a0ecSDave Kleikamp #endif 1931ac27a0ecSDave Kleikamp 1932ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 1933ac27a0ecSDave Kleikamp struct inode *inode; 1934ac27a0ecSDave Kleikamp 193597bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 193697bd42b9SJosef Bacik if (IS_ERR(inode)) { 1937ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1938ac27a0ecSDave Kleikamp break; 1939ac27a0ecSDave Kleikamp } 1940ac27a0ecSDave Kleikamp 1941617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 1942a269eb18SJan Kara vfs_dq_init(inode); 1943ac27a0ecSDave Kleikamp if (inode->i_nlink) { 1944b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 1945b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 194646e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 1947e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 1948ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 1949617ba13bSMingming Cao ext4_truncate(inode); 1950ac27a0ecSDave Kleikamp nr_truncates++; 1951ac27a0ecSDave Kleikamp } else { 1952b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 1953b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 195446e665e9SHarvey Harrison __func__, inode->i_ino); 1955ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 1956ac27a0ecSDave Kleikamp inode->i_ino); 1957ac27a0ecSDave Kleikamp nr_orphans++; 1958ac27a0ecSDave Kleikamp } 1959ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 1960ac27a0ecSDave Kleikamp } 1961ac27a0ecSDave Kleikamp 1962ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 1963ac27a0ecSDave Kleikamp 1964ac27a0ecSDave Kleikamp if (nr_orphans) 1965b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 1966b31e1552SEric Sandeen PLURAL(nr_orphans)); 1967ac27a0ecSDave Kleikamp if (nr_truncates) 1968b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 1969b31e1552SEric Sandeen PLURAL(nr_truncates)); 1970ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1971ac27a0ecSDave Kleikamp /* Turn quotas off */ 1972ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1973ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 19746f28e087SJan Kara vfs_quota_off(sb, i, 0); 1975ac27a0ecSDave Kleikamp } 1976ac27a0ecSDave Kleikamp #endif 1977ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 1978ac27a0ecSDave Kleikamp } 19790b8e58a1SAndreas Dilger 1980cd2291a4SEric Sandeen /* 1981cd2291a4SEric Sandeen * Maximal extent format file size. 1982cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 1983cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 1984cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 1985cd2291a4SEric Sandeen * so that won't be a limiting factor. 1986cd2291a4SEric Sandeen * 1987cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 1988cd2291a4SEric Sandeen */ 1989f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 1990cd2291a4SEric Sandeen { 1991cd2291a4SEric Sandeen loff_t res; 1992cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 1993cd2291a4SEric Sandeen 1994cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 1995f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 1996cd2291a4SEric Sandeen /* 199790c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 1998cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 1999cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2000cd2291a4SEric Sandeen */ 2001cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2002cd2291a4SEric Sandeen 2003cd2291a4SEric Sandeen /* total blocks in file system block size */ 2004cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2005cd2291a4SEric Sandeen upper_limit <<= blkbits; 2006cd2291a4SEric Sandeen } 2007cd2291a4SEric Sandeen 2008cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 2009cd2291a4SEric Sandeen res = 1LL << 32; 2010cd2291a4SEric Sandeen res <<= blkbits; 2011cd2291a4SEric Sandeen res -= 1; 2012cd2291a4SEric Sandeen 2013cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2014cd2291a4SEric Sandeen if (res > upper_limit) 2015cd2291a4SEric Sandeen res = upper_limit; 2016cd2291a4SEric Sandeen 2017cd2291a4SEric Sandeen return res; 2018cd2291a4SEric Sandeen } 2019ac27a0ecSDave Kleikamp 2020ac27a0ecSDave Kleikamp /* 2021cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 20220fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 20230fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2024ac27a0ecSDave Kleikamp */ 2025f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2026ac27a0ecSDave Kleikamp { 2027617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 20280fc1b451SAneesh Kumar K.V int meta_blocks; 20290fc1b451SAneesh Kumar K.V loff_t upper_limit; 20300b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 20310b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 20320b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 20330b8e58a1SAndreas Dilger * 20340b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 20350b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 20360fc1b451SAneesh Kumar K.V */ 20370fc1b451SAneesh Kumar K.V 2038f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 20390fc1b451SAneesh Kumar K.V /* 204090c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 20410b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 20420b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 20430fc1b451SAneesh Kumar K.V */ 20440fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 20450fc1b451SAneesh Kumar K.V 20460fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 20470fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 20480fc1b451SAneesh Kumar K.V 20490fc1b451SAneesh Kumar K.V } else { 20508180a562SAneesh Kumar K.V /* 20518180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 20528180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 20538180a562SAneesh Kumar K.V * represent total number of blocks in 20548180a562SAneesh Kumar K.V * file system block size 20558180a562SAneesh Kumar K.V */ 20560fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 20570fc1b451SAneesh Kumar K.V 20580fc1b451SAneesh Kumar K.V } 20590fc1b451SAneesh Kumar K.V 20600fc1b451SAneesh Kumar K.V /* indirect blocks */ 20610fc1b451SAneesh Kumar K.V meta_blocks = 1; 20620fc1b451SAneesh Kumar K.V /* double indirect blocks */ 20630fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 20640fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 20650fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 20660fc1b451SAneesh Kumar K.V 20670fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 20680fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2069ac27a0ecSDave Kleikamp 2070ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2071ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2072ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2073ac27a0ecSDave Kleikamp res <<= bits; 2074ac27a0ecSDave Kleikamp if (res > upper_limit) 2075ac27a0ecSDave Kleikamp res = upper_limit; 20760fc1b451SAneesh Kumar K.V 20770fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 20780fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 20790fc1b451SAneesh Kumar K.V 2080ac27a0ecSDave Kleikamp return res; 2081ac27a0ecSDave Kleikamp } 2082ac27a0ecSDave Kleikamp 2083617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 208470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2085ac27a0ecSDave Kleikamp { 2086617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2087fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2088ac27a0ecSDave Kleikamp int has_super = 0; 2089ac27a0ecSDave Kleikamp 2090ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2091ac27a0ecSDave Kleikamp 2092617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2093ac27a0ecSDave Kleikamp nr < first_meta_bg) 209470bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2095ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2096617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2097ac27a0ecSDave Kleikamp has_super = 1; 20980b8e58a1SAndreas Dilger 2099617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2100ac27a0ecSDave Kleikamp } 2101ac27a0ecSDave Kleikamp 2102c9de560dSAlex Tomas /** 2103c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2104c9de560dSAlex Tomas * @sbi: In memory super block info 2105c9de560dSAlex Tomas * 2106c9de560dSAlex Tomas * If we have specified it via mount option, then 2107c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2108c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2109c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2110c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2111c9de560dSAlex Tomas * 2112c9de560dSAlex Tomas */ 2113c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2114c9de560dSAlex Tomas { 2115c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2116c9de560dSAlex Tomas unsigned long stripe_width = 2117c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 2118c9de560dSAlex Tomas 2119c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 2120c9de560dSAlex Tomas return sbi->s_stripe; 2121c9de560dSAlex Tomas 2122c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 2123c9de560dSAlex Tomas return stripe_width; 2124c9de560dSAlex Tomas 2125c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 2126c9de560dSAlex Tomas return stride; 2127c9de560dSAlex Tomas 2128c9de560dSAlex Tomas return 0; 2129c9de560dSAlex Tomas } 2130ac27a0ecSDave Kleikamp 21313197ebdbSTheodore Ts'o /* sysfs supprt */ 21323197ebdbSTheodore Ts'o 21333197ebdbSTheodore Ts'o struct ext4_attr { 21343197ebdbSTheodore Ts'o struct attribute attr; 21353197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 21363197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 21373197ebdbSTheodore Ts'o const char *, size_t); 21383197ebdbSTheodore Ts'o int offset; 21393197ebdbSTheodore Ts'o }; 21403197ebdbSTheodore Ts'o 21413197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 21423197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 21433197ebdbSTheodore Ts'o { 21443197ebdbSTheodore Ts'o char *endp; 21453197ebdbSTheodore Ts'o 2146e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2147e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 21483197ebdbSTheodore Ts'o if (*endp || *value > max) 21493197ebdbSTheodore Ts'o return -EINVAL; 21503197ebdbSTheodore Ts'o 21513197ebdbSTheodore Ts'o return 0; 21523197ebdbSTheodore Ts'o } 21533197ebdbSTheodore Ts'o 21543197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 21553197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 21563197ebdbSTheodore Ts'o char *buf) 21573197ebdbSTheodore Ts'o { 21583197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 21593197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 21603197ebdbSTheodore Ts'o } 21613197ebdbSTheodore Ts'o 21623197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 21633197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 21643197ebdbSTheodore Ts'o { 21653197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 21663197ebdbSTheodore Ts'o 21673197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 21683197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 21693197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 21703197ebdbSTheodore Ts'o } 21713197ebdbSTheodore Ts'o 21723197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 21733197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 21743197ebdbSTheodore Ts'o { 21753197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 21763197ebdbSTheodore Ts'o 21773197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2178a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 21793197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2180a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 21813197ebdbSTheodore Ts'o } 21823197ebdbSTheodore Ts'o 21833197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 21843197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 21853197ebdbSTheodore Ts'o const char *buf, size_t count) 21863197ebdbSTheodore Ts'o { 21873197ebdbSTheodore Ts'o unsigned long t; 21883197ebdbSTheodore Ts'o 21893197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 21903197ebdbSTheodore Ts'o return -EINVAL; 21913197ebdbSTheodore Ts'o 2192f7c43950STheodore Ts'o if (!is_power_of_2(t)) 21933197ebdbSTheodore Ts'o return -EINVAL; 21943197ebdbSTheodore Ts'o 21953197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 21963197ebdbSTheodore Ts'o return count; 21973197ebdbSTheodore Ts'o } 21983197ebdbSTheodore Ts'o 21993197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 22003197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 22013197ebdbSTheodore Ts'o { 22023197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 22033197ebdbSTheodore Ts'o 22043197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 22053197ebdbSTheodore Ts'o } 22063197ebdbSTheodore Ts'o 22073197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 22083197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 22093197ebdbSTheodore Ts'o const char *buf, size_t count) 22103197ebdbSTheodore Ts'o { 22113197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 22123197ebdbSTheodore Ts'o unsigned long t; 22133197ebdbSTheodore Ts'o 22143197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 22153197ebdbSTheodore Ts'o return -EINVAL; 22163197ebdbSTheodore Ts'o *ui = t; 22173197ebdbSTheodore Ts'o return count; 22183197ebdbSTheodore Ts'o } 22193197ebdbSTheodore Ts'o 22203197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 22213197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 22223197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 22233197ebdbSTheodore Ts'o .show = _show, \ 22243197ebdbSTheodore Ts'o .store = _store, \ 22253197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 22263197ebdbSTheodore Ts'o } 22273197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 22283197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 22293197ebdbSTheodore Ts'o 22303197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 22313197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 22323197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 22333197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 22343197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 22353197ebdbSTheodore Ts'o 22363197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 22373197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 22383197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 22393197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 22403197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 224111013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 22423197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 22433197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 22443197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 22453197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 22463197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 22473197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 224855138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 22493197ebdbSTheodore Ts'o 22503197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 22513197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 22523197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 22533197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 22543197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 225511013911SAndreas Dilger ATTR_LIST(inode_goal), 22563197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 22573197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 22583197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 22593197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 22603197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 22613197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 226255138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 22633197ebdbSTheodore Ts'o NULL, 22643197ebdbSTheodore Ts'o }; 22653197ebdbSTheodore Ts'o 22663197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 22673197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 22683197ebdbSTheodore Ts'o { 22693197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 22703197ebdbSTheodore Ts'o s_kobj); 22713197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 22723197ebdbSTheodore Ts'o 22733197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 22743197ebdbSTheodore Ts'o } 22753197ebdbSTheodore Ts'o 22763197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 22773197ebdbSTheodore Ts'o struct attribute *attr, 22783197ebdbSTheodore Ts'o const char *buf, size_t len) 22793197ebdbSTheodore Ts'o { 22803197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 22813197ebdbSTheodore Ts'o s_kobj); 22823197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 22833197ebdbSTheodore Ts'o 22843197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 22853197ebdbSTheodore Ts'o } 22863197ebdbSTheodore Ts'o 22873197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 22883197ebdbSTheodore Ts'o { 22893197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 22903197ebdbSTheodore Ts'o s_kobj); 22913197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 22923197ebdbSTheodore Ts'o } 22933197ebdbSTheodore Ts'o 22943197ebdbSTheodore Ts'o 22953197ebdbSTheodore Ts'o static struct sysfs_ops ext4_attr_ops = { 22963197ebdbSTheodore Ts'o .show = ext4_attr_show, 22973197ebdbSTheodore Ts'o .store = ext4_attr_store, 22983197ebdbSTheodore Ts'o }; 22993197ebdbSTheodore Ts'o 23003197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 23013197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 23023197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 23033197ebdbSTheodore Ts'o .release = ext4_sb_release, 23043197ebdbSTheodore Ts'o }; 23053197ebdbSTheodore Ts'o 2306a13fb1a4SEric Sandeen /* 2307a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2308a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2309a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2310a13fb1a4SEric Sandeen * 0 if it cannot be. 2311a13fb1a4SEric Sandeen */ 2312a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2313a13fb1a4SEric Sandeen { 2314a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2315a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2316a13fb1a4SEric Sandeen "Couldn't mount because of " 2317a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2318a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2319a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2320a13fb1a4SEric Sandeen return 0; 2321a13fb1a4SEric Sandeen } 2322a13fb1a4SEric Sandeen 2323a13fb1a4SEric Sandeen if (readonly) 2324a13fb1a4SEric Sandeen return 1; 2325a13fb1a4SEric Sandeen 2326a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2327a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2328a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2329a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2330a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2331a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2332a13fb1a4SEric Sandeen return 0; 2333a13fb1a4SEric Sandeen } 2334a13fb1a4SEric Sandeen /* 2335a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2336a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2337a13fb1a4SEric Sandeen */ 2338a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2339a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2340a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2341a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2342a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2343a13fb1a4SEric Sandeen return 0; 2344a13fb1a4SEric Sandeen } 2345a13fb1a4SEric Sandeen } 2346a13fb1a4SEric Sandeen return 1; 2347a13fb1a4SEric Sandeen } 2348a13fb1a4SEric Sandeen 2349617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 23507477827fSAneesh Kumar K.V __releases(kernel_lock) 23517477827fSAneesh Kumar K.V __acquires(kernel_lock) 2352ac27a0ecSDave Kleikamp { 2353ac27a0ecSDave Kleikamp struct buffer_head *bh; 2354617ba13bSMingming Cao struct ext4_super_block *es = NULL; 2355617ba13bSMingming Cao struct ext4_sb_info *sbi; 2356617ba13bSMingming Cao ext4_fsblk_t block; 2357617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 235870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 2359ac27a0ecSDave Kleikamp unsigned long offset = 0; 2360ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 2361ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 2362ac27a0ecSDave Kleikamp struct inode *root; 23639f6200bbSTheodore Ts'o char *cp; 23640390131bSFrank Mayhar const char *descr; 23651d1fe1eeSDavid Howells int ret = -EINVAL; 2366ac27a0ecSDave Kleikamp int blocksize; 23674ec11028STheodore Ts'o unsigned int db_count; 23684ec11028STheodore Ts'o unsigned int i; 2369f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 2370bd81d8eeSLaurent Vivier __u64 blocks_count; 2371833f4077SPeter Zijlstra int err; 2372b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 2373ac27a0ecSDave Kleikamp 2374ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 2375ac27a0ecSDave Kleikamp if (!sbi) 2376ac27a0ecSDave Kleikamp return -ENOMEM; 2377705895b6SPekka Enberg 2378705895b6SPekka Enberg sbi->s_blockgroup_lock = 2379705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 2380705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 2381705895b6SPekka Enberg kfree(sbi); 2382705895b6SPekka Enberg return -ENOMEM; 2383705895b6SPekka Enberg } 2384ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 2385ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 2386617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 2387617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 2388240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 2389d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 2390afc32f7eSTheodore Ts'o sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, 2391afc32f7eSTheodore Ts'o sectors[1]); 2392ac27a0ecSDave Kleikamp 2393ac27a0ecSDave Kleikamp unlock_kernel(); 2394ac27a0ecSDave Kleikamp 23959f6200bbSTheodore Ts'o /* Cleanup superblock name */ 23969f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 23979f6200bbSTheodore Ts'o *cp = '!'; 23989f6200bbSTheodore Ts'o 2399617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 2400ac27a0ecSDave Kleikamp if (!blocksize) { 2401b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 2402ac27a0ecSDave Kleikamp goto out_fail; 2403ac27a0ecSDave Kleikamp } 2404ac27a0ecSDave Kleikamp 2405ac27a0ecSDave Kleikamp /* 2406617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 2407ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 2408ac27a0ecSDave Kleikamp */ 2409617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 241070bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 241170bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 2412ac27a0ecSDave Kleikamp } else { 241370bbb3e0SAndrew Morton logical_sb_block = sb_block; 2414ac27a0ecSDave Kleikamp } 2415ac27a0ecSDave Kleikamp 241670bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 2417b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 2418ac27a0ecSDave Kleikamp goto out_fail; 2419ac27a0ecSDave Kleikamp } 2420ac27a0ecSDave Kleikamp /* 2421ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 2422617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 2423ac27a0ecSDave Kleikamp */ 2424617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2425ac27a0ecSDave Kleikamp sbi->s_es = es; 2426ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 2427617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 2428617ba13bSMingming Cao goto cantfind_ext4; 2429afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 2430ac27a0ecSDave Kleikamp 2431ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 2432ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 2433617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 2434ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 2435617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 2436ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 2437617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 2438ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 243903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 2440617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 2441ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 24422e7842b8SHugh Dickins #endif 244303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 2444617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 2445ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 24462e7842b8SHugh Dickins #endif 2447617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 2448617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 2449617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 2450617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 2451617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 2452617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; 2453ac27a0ecSDave Kleikamp 2454617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 2455ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 2456bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 2457ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 2458bb4f397aSAneesh Kumar K.V else 2459bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 2460ac27a0ecSDave Kleikamp 2461ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 2462ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 246330773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 246430773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 246530773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 2466ac27a0ecSDave Kleikamp 2467571640caSEric Sandeen set_opt(sbi->s_mount_opt, BARRIER); 2468ac27a0ecSDave Kleikamp 24691e2462f9SMingming Cao /* 2470dd919b98SAneesh Kumar K.V * enable delayed allocation by default 2471dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 2472dd919b98SAneesh Kumar K.V */ 2473dd919b98SAneesh Kumar K.V set_opt(sbi->s_mount_opt, DELALLOC); 2474dd919b98SAneesh Kumar K.V 2475b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 2476b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 2477ac27a0ecSDave Kleikamp goto failed_mount; 2478ac27a0ecSDave Kleikamp 2479ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2480617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 2481ac27a0ecSDave Kleikamp 2482617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 2483617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 2484617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 2485617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 2486b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2487b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 2488b31e1552SEric Sandeen "running e2fsck is recommended"); 2489469108ffSTheodore Tso 2490469108ffSTheodore Tso /* 2491ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 2492ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 2493ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 2494ac27a0ecSDave Kleikamp */ 2495a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 2496ac27a0ecSDave Kleikamp goto failed_mount; 2497a13fb1a4SEric Sandeen 2498ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 2499ac27a0ecSDave Kleikamp 2500617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 2501617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 2502b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2503b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 2504ac27a0ecSDave Kleikamp goto failed_mount; 2505ac27a0ecSDave Kleikamp } 2506ac27a0ecSDave Kleikamp 2507ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 2508ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 2509ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 2510b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 2511ce40733cSAneesh Kumar K.V blocksize); 2512ac27a0ecSDave Kleikamp goto failed_mount; 2513ac27a0ecSDave Kleikamp } 2514ac27a0ecSDave Kleikamp 2515ac27a0ecSDave Kleikamp brelse(bh); 251670bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 251770bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 251870bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 2519ac27a0ecSDave Kleikamp if (!bh) { 2520b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2521b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 2522ac27a0ecSDave Kleikamp goto failed_mount; 2523ac27a0ecSDave Kleikamp } 2524617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 2525ac27a0ecSDave Kleikamp sbi->s_es = es; 2526617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 2527b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2528b31e1552SEric Sandeen "Magic mismatch, very weird!"); 2529ac27a0ecSDave Kleikamp goto failed_mount; 2530ac27a0ecSDave Kleikamp } 2531ac27a0ecSDave Kleikamp } 2532ac27a0ecSDave Kleikamp 2533a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2534a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 2535f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 2536f287a1a5STheodore Ts'o has_huge_files); 2537f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 2538ac27a0ecSDave Kleikamp 2539617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 2540617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 2541617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 2542ac27a0ecSDave Kleikamp } else { 2543ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2544ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2545617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 25461330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2547ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2548b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2549b31e1552SEric Sandeen "unsupported inode size: %d", 2550ac27a0ecSDave Kleikamp sbi->s_inode_size); 2551ac27a0ecSDave Kleikamp goto failed_mount; 2552ac27a0ecSDave Kleikamp } 2553ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2554ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2555ac27a0ecSDave Kleikamp } 25560b8e58a1SAndreas Dilger 25570d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 25580d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 25598fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 25600d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2561d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 2562b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2563b31e1552SEric Sandeen "unsupported descriptor size %lu", 25640d1ee42fSAlexandre Ratchov sbi->s_desc_size); 25650d1ee42fSAlexandre Ratchov goto failed_mount; 25660d1ee42fSAlexandre Ratchov } 25670d1ee42fSAlexandre Ratchov } else 25680d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 25690b8e58a1SAndreas Dilger 2570ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2571ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2572b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2573617ba13bSMingming Cao goto cantfind_ext4; 25740b8e58a1SAndreas Dilger 2575617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2576ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2577617ba13bSMingming Cao goto cantfind_ext4; 2578ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2579ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 25800d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2581ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2582ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2583e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2584e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 25850b8e58a1SAndreas Dilger 2586ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 2587ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2588ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2589f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 2590f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 2591f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2592f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 2593f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 2594f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 2595f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2596f99b2589STheodore Ts'o #else 2597f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 2598f99b2589STheodore Ts'o #endif 2599f99b2589STheodore Ts'o sb->s_dirt = 1; 2600f99b2589STheodore Ts'o } 2601ac27a0ecSDave Kleikamp 2602ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2603b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2604b31e1552SEric Sandeen "#blocks per group too big: %lu", 2605ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2606ac27a0ecSDave Kleikamp goto failed_mount; 2607ac27a0ecSDave Kleikamp } 2608ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2609b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2610b31e1552SEric Sandeen "#inodes per group too big: %lu", 2611ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2612ac27a0ecSDave Kleikamp goto failed_mount; 2613ac27a0ecSDave Kleikamp } 2614ac27a0ecSDave Kleikamp 2615bf43d84bSEric Sandeen /* 2616bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 2617bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 2618bf43d84bSEric Sandeen */ 2619bf43d84bSEric Sandeen if ((ext4_blocks_count(es) > 2620bf43d84bSEric Sandeen (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) || 2621bf43d84bSEric Sandeen (ext4_blocks_count(es) > 2622bf43d84bSEric Sandeen (pgoff_t)(~0ULL) >> (PAGE_CACHE_SHIFT - sb->s_blocksize_bits))) { 2623b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 2624bf43d84bSEric Sandeen " too large to mount safely on this system"); 2625ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 262690c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 2627bf43d84bSEric Sandeen ret = -EFBIG; 2628ac27a0ecSDave Kleikamp goto failed_mount; 2629ac27a0ecSDave Kleikamp } 2630ac27a0ecSDave Kleikamp 2631617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2632617ba13bSMingming Cao goto cantfind_ext4; 2633e7c95593SEric Sandeen 26340f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 26350f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 26360f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 2637b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 2638b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 26390f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 26400f2ddca6SFrom: Thiemo Nagel goto failed_mount; 26410f2ddca6SFrom: Thiemo Nagel } 26420f2ddca6SFrom: Thiemo Nagel 26434ec11028STheodore Ts'o /* 26444ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 26454ec11028STheodore Ts'o * of the filesystem. 26464ec11028STheodore Ts'o */ 26474ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 2648b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 2649b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 2650e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 26514ec11028STheodore Ts'o ext4_blocks_count(es)); 2652e7c95593SEric Sandeen goto failed_mount; 2653e7c95593SEric Sandeen } 2654bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2655bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2656bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2657bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 26584ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 2659b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 26604ec11028STheodore Ts'o "(block count %llu, first data block %u, " 2661b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 26624ec11028STheodore Ts'o ext4_blocks_count(es), 26634ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 26644ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 26654ec11028STheodore Ts'o goto failed_mount; 26664ec11028STheodore Ts'o } 2667bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2668fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 2669fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 2670617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2671617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2672ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 2673ac27a0ecSDave Kleikamp GFP_KERNEL); 2674ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2675b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 2676ac27a0ecSDave Kleikamp goto failed_mount; 2677ac27a0ecSDave Kleikamp } 2678ac27a0ecSDave Kleikamp 26793244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 26809f6200bbSTheodore Ts'o if (ext4_proc_root) 26819f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 26823244fcb1SAlexander Beregalov #endif 2683240799cdSTheodore Ts'o 2684705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 2685ac27a0ecSDave Kleikamp 2686ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 268770bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2688ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2689ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2690b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2691b31e1552SEric Sandeen "can't read group descriptor %d", i); 2692ac27a0ecSDave Kleikamp db_count = i; 2693ac27a0ecSDave Kleikamp goto failed_mount2; 2694ac27a0ecSDave Kleikamp } 2695ac27a0ecSDave Kleikamp } 2696617ba13bSMingming Cao if (!ext4_check_descriptors(sb)) { 2697b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 2698ac27a0ecSDave Kleikamp goto failed_mount2; 2699ac27a0ecSDave Kleikamp } 2700772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2701772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 2702b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2703b31e1552SEric Sandeen "unable to initialize " 2704b31e1552SEric Sandeen "flex_bg meta info!"); 2705772cb7c8SJose R. Santos goto failed_mount2; 2706772cb7c8SJose R. Santos } 2707772cb7c8SJose R. Santos 2708ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2709ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2710ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2711ac27a0ecSDave Kleikamp 2712833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeblocks_counter, 2713617ba13bSMingming Cao ext4_count_free_blocks(sb)); 2714833f4077SPeter Zijlstra if (!err) { 2715833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeinodes_counter, 2716617ba13bSMingming Cao ext4_count_free_inodes(sb)); 2717833f4077SPeter Zijlstra } 2718833f4077SPeter Zijlstra if (!err) { 2719833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_dirs_counter, 2720617ba13bSMingming Cao ext4_count_dirs(sb)); 2721833f4077SPeter Zijlstra } 27226bc6e63fSAneesh Kumar K.V if (!err) { 27236bc6e63fSAneesh Kumar K.V err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 27246bc6e63fSAneesh Kumar K.V } 2725833f4077SPeter Zijlstra if (err) { 2726b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "insufficient memory"); 2727833f4077SPeter Zijlstra goto failed_mount3; 2728833f4077SPeter Zijlstra } 2729ac27a0ecSDave Kleikamp 2730c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 273155138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 2732c9de560dSAlex Tomas 2733ac27a0ecSDave Kleikamp /* 2734ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2735ac27a0ecSDave Kleikamp */ 27369ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 27379ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 2738617ba13bSMingming Cao sb->s_op = &ext4_sops; 27399ca92389STheodore Ts'o else 27409ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 2741617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2742617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2743ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2744617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2745617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2746ac27a0ecSDave Kleikamp #endif 2747ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 27483b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 274932ed5058STheodore Ts'o mutex_init(&sbi->s_resize_lock); 2750ac27a0ecSDave Kleikamp 2751ac27a0ecSDave Kleikamp sb->s_root = NULL; 2752ac27a0ecSDave Kleikamp 2753ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2754617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2755617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2756ac27a0ecSDave Kleikamp 2757ac27a0ecSDave Kleikamp /* 2758ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2759ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2760ac27a0ecSDave Kleikamp */ 2761ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2762617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2763617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2764ac27a0ecSDave Kleikamp goto failed_mount3; 27650390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 27660390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2767b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 2768b31e1552SEric Sandeen "suppressed and not mounted read-only"); 27690390131bSFrank Mayhar goto failed_mount4; 2770ac27a0ecSDave Kleikamp } else { 27710390131bSFrank Mayhar clear_opt(sbi->s_mount_opt, DATA_FLAGS); 27720390131bSFrank Mayhar set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 27730390131bSFrank Mayhar sbi->s_journal = NULL; 27740390131bSFrank Mayhar needs_recovery = 0; 27750390131bSFrank Mayhar goto no_journal; 2776ac27a0ecSDave Kleikamp } 2777ac27a0ecSDave Kleikamp 2778eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2779eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2780eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2781b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 2782eb40a09cSJose R. Santos goto failed_mount4; 2783eb40a09cSJose R. Santos } 2784eb40a09cSJose R. Santos 2785d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 2786d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 2787d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2788d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2789d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 2790818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2791818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2792818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2793818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2794d4da6c9cSLinus Torvalds } else { 2795d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 2796d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2797d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2798d4da6c9cSLinus Torvalds } 2799818d276cSGirish Shilamkar 2800ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2801ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2802ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 2803ac27a0ecSDave Kleikamp case 0: 2804ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 280563f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 280663f57933SAndrew Morton * cope, else JOURNAL_DATA 280763f57933SAndrew Morton */ 2808dab291afSMingming Cao if (jbd2_journal_check_available_features 2809dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 2810ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 2811ac27a0ecSDave Kleikamp else 2812ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2813ac27a0ecSDave Kleikamp break; 2814ac27a0ecSDave Kleikamp 2815617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 2816617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 2817dab291afSMingming Cao if (!jbd2_journal_check_available_features 2818dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 2819b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 2820b31e1552SEric Sandeen "requested data journaling mode"); 2821ac27a0ecSDave Kleikamp goto failed_mount4; 2822ac27a0ecSDave Kleikamp } 2823ac27a0ecSDave Kleikamp default: 2824ac27a0ecSDave Kleikamp break; 2825ac27a0ecSDave Kleikamp } 2826b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 2827ac27a0ecSDave Kleikamp 28280390131bSFrank Mayhar no_journal: 2829ac27a0ecSDave Kleikamp 2830ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 2831617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 2832b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring nobh option - " 2833b31e1552SEric Sandeen "its supported only with writeback mode"); 2834ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 2835ac27a0ecSDave Kleikamp } 2836ac27a0ecSDave Kleikamp } 28374c0425ffSMingming Cao EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); 28384c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 28394c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 28404c0425ffSMingming Cao goto failed_mount_wq; 28414c0425ffSMingming Cao } 28424c0425ffSMingming Cao 2843ac27a0ecSDave Kleikamp /* 2844dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 2845ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 2846ac27a0ecSDave Kleikamp */ 2847ac27a0ecSDave Kleikamp 28481d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 28491d1fe1eeSDavid Howells if (IS_ERR(root)) { 2850b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 28511d1fe1eeSDavid Howells ret = PTR_ERR(root); 2852ac27a0ecSDave Kleikamp goto failed_mount4; 2853ac27a0ecSDave Kleikamp } 2854ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 28551d1fe1eeSDavid Howells iput(root); 2856b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 2857ac27a0ecSDave Kleikamp goto failed_mount4; 2858ac27a0ecSDave Kleikamp } 28591d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 28601d1fe1eeSDavid Howells if (!sb->s_root) { 2861b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 28621d1fe1eeSDavid Howells iput(root); 28631d1fe1eeSDavid Howells ret = -ENOMEM; 28641d1fe1eeSDavid Howells goto failed_mount4; 28651d1fe1eeSDavid Howells } 2866ac27a0ecSDave Kleikamp 2867617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 2868ef7f3835SKalpak Shah 2869ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 2870ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 2871ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2872ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2873ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 2874ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 2875ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2876ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 2877ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2878ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 2879ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2880ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 2881ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2882ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 2883ef7f3835SKalpak Shah } 2884ef7f3835SKalpak Shah } 2885ef7f3835SKalpak Shah /* Check if enough inode space is available */ 2886ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 2887ef7f3835SKalpak Shah sbi->s_inode_size) { 2888ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2889ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2890b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 2891b31e1552SEric Sandeen "available"); 2892ef7f3835SKalpak Shah } 2893ef7f3835SKalpak Shah 289490576c0bSTheodore Ts'o if (test_opt(sb, DELALLOC) && 289590576c0bSTheodore Ts'o (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 2896b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " 2897b31e1552SEric Sandeen "requested data journaling mode"); 2898c2774d84SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 289990576c0bSTheodore Ts'o } 2900c2774d84SAneesh Kumar K.V 29016fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 29026fd058f7STheodore Ts'o if (err) { 2903b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 29046fd058f7STheodore Ts'o "zone (%d)\n", err); 29056fd058f7STheodore Ts'o goto failed_mount4; 29066fd058f7STheodore Ts'o } 29076fd058f7STheodore Ts'o 2908c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 2909c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 2910c2774d84SAneesh Kumar K.V if (err) { 2911b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initalize mballoc (%d)", 2912c2774d84SAneesh Kumar K.V err); 2913c2774d84SAneesh Kumar K.V goto failed_mount4; 2914c2774d84SAneesh Kumar K.V } 2915c2774d84SAneesh Kumar K.V 29163197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 29173197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 29183197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 29193197ebdbSTheodore Ts'o "%s", sb->s_id); 29203197ebdbSTheodore Ts'o if (err) { 29213197ebdbSTheodore Ts'o ext4_mb_release(sb); 29223197ebdbSTheodore Ts'o ext4_ext_release(sb); 29233197ebdbSTheodore Ts'o goto failed_mount4; 29243197ebdbSTheodore Ts'o }; 29253197ebdbSTheodore Ts'o 2926617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 2927617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 2928617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 29290390131bSFrank Mayhar if (needs_recovery) { 2930b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 2931617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 29320390131bSFrank Mayhar } 29330390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 29340390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 29350390131bSFrank Mayhar descr = " journalled data mode"; 29360390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 29370390131bSFrank Mayhar descr = " ordered data mode"; 29380390131bSFrank Mayhar else 29390390131bSFrank Mayhar descr = " writeback data mode"; 29400390131bSFrank Mayhar } else 29410390131bSFrank Mayhar descr = "out journal"; 29420390131bSFrank Mayhar 2943b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "mounted filesystem with%s", descr); 2944ac27a0ecSDave Kleikamp 2945ac27a0ecSDave Kleikamp lock_kernel(); 2946ac27a0ecSDave Kleikamp return 0; 2947ac27a0ecSDave Kleikamp 2948617ba13bSMingming Cao cantfind_ext4: 2949ac27a0ecSDave Kleikamp if (!silent) 2950b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 2951ac27a0ecSDave Kleikamp goto failed_mount; 2952ac27a0ecSDave Kleikamp 2953ac27a0ecSDave Kleikamp failed_mount4: 2954b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 29554c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 29564c0425ffSMingming Cao failed_mount_wq: 29576fd058f7STheodore Ts'o ext4_release_system_zone(sb); 29580390131bSFrank Mayhar if (sbi->s_journal) { 2959dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 296047b4a50bSJan Kara sbi->s_journal = NULL; 29610390131bSFrank Mayhar } 2962ac27a0ecSDave Kleikamp failed_mount3: 2963c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) { 2964c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 2965c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 2966c5ca7c76STheodore Ts'o else 2967c5ca7c76STheodore Ts'o kfree(sbi->s_flex_groups); 2968c5ca7c76STheodore Ts'o } 2969ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 2970ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 2971ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 29726bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 2973ac27a0ecSDave Kleikamp failed_mount2: 2974ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 2975ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 2976ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 2977ac27a0ecSDave Kleikamp failed_mount: 2978240799cdSTheodore Ts'o if (sbi->s_proc) { 29799f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 2980240799cdSTheodore Ts'o } 2981ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2982ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2983ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 2984ac27a0ecSDave Kleikamp #endif 2985617ba13bSMingming Cao ext4_blkdev_remove(sbi); 2986ac27a0ecSDave Kleikamp brelse(bh); 2987ac27a0ecSDave Kleikamp out_fail: 2988ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 2989f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 2990ac27a0ecSDave Kleikamp kfree(sbi); 2991ac27a0ecSDave Kleikamp lock_kernel(); 29921d1fe1eeSDavid Howells return ret; 2993ac27a0ecSDave Kleikamp } 2994ac27a0ecSDave Kleikamp 2995ac27a0ecSDave Kleikamp /* 2996ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 2997ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 2998ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 2999ac27a0ecSDave Kleikamp */ 3000617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3001ac27a0ecSDave Kleikamp { 3002617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3003ac27a0ecSDave Kleikamp 3004ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 300530773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 300630773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3007ac27a0ecSDave Kleikamp 3008ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 3009ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3010dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3011ac27a0ecSDave Kleikamp else 3012dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 30135bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 30145bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 30155bf5683aSHidehiro Kawai else 30165bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3017ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 3018ac27a0ecSDave Kleikamp } 3019ac27a0ecSDave Kleikamp 3020617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3021ac27a0ecSDave Kleikamp unsigned int journal_inum) 3022ac27a0ecSDave Kleikamp { 3023ac27a0ecSDave Kleikamp struct inode *journal_inode; 3024ac27a0ecSDave Kleikamp journal_t *journal; 3025ac27a0ecSDave Kleikamp 30260390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 30270390131bSFrank Mayhar 3028ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3029ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3030ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3031ac27a0ecSDave Kleikamp 30321d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 30331d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3034b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3035ac27a0ecSDave Kleikamp return NULL; 3036ac27a0ecSDave Kleikamp } 3037ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3038ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3039ac27a0ecSDave Kleikamp iput(journal_inode); 3040b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3041ac27a0ecSDave Kleikamp return NULL; 3042ac27a0ecSDave Kleikamp } 3043ac27a0ecSDave Kleikamp 3044e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3045ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 30461d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3047b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3048ac27a0ecSDave Kleikamp iput(journal_inode); 3049ac27a0ecSDave Kleikamp return NULL; 3050ac27a0ecSDave Kleikamp } 3051ac27a0ecSDave Kleikamp 3052dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3053ac27a0ecSDave Kleikamp if (!journal) { 3054b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3055ac27a0ecSDave Kleikamp iput(journal_inode); 3056ac27a0ecSDave Kleikamp return NULL; 3057ac27a0ecSDave Kleikamp } 3058ac27a0ecSDave Kleikamp journal->j_private = sb; 3059617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3060ac27a0ecSDave Kleikamp return journal; 3061ac27a0ecSDave Kleikamp } 3062ac27a0ecSDave Kleikamp 3063617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3064ac27a0ecSDave Kleikamp dev_t j_dev) 3065ac27a0ecSDave Kleikamp { 3066ac27a0ecSDave Kleikamp struct buffer_head *bh; 3067ac27a0ecSDave Kleikamp journal_t *journal; 3068617ba13bSMingming Cao ext4_fsblk_t start; 3069617ba13bSMingming Cao ext4_fsblk_t len; 3070ac27a0ecSDave Kleikamp int hblock, blocksize; 3071617ba13bSMingming Cao ext4_fsblk_t sb_block; 3072ac27a0ecSDave Kleikamp unsigned long offset; 3073617ba13bSMingming Cao struct ext4_super_block *es; 3074ac27a0ecSDave Kleikamp struct block_device *bdev; 3075ac27a0ecSDave Kleikamp 30760390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 30770390131bSFrank Mayhar 3078b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3079ac27a0ecSDave Kleikamp if (bdev == NULL) 3080ac27a0ecSDave Kleikamp return NULL; 3081ac27a0ecSDave Kleikamp 3082ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 3083b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3084b31e1552SEric Sandeen "failed to claim external journal device"); 30859a1c3542SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 3086ac27a0ecSDave Kleikamp return NULL; 3087ac27a0ecSDave Kleikamp } 3088ac27a0ecSDave Kleikamp 3089ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3090e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3091ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3092b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3093b31e1552SEric Sandeen "blocksize too small for journal device"); 3094ac27a0ecSDave Kleikamp goto out_bdev; 3095ac27a0ecSDave Kleikamp } 3096ac27a0ecSDave Kleikamp 3097617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3098617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3099ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3100ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3101b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3102b31e1552SEric Sandeen "external journal"); 3103ac27a0ecSDave Kleikamp goto out_bdev; 3104ac27a0ecSDave Kleikamp } 3105ac27a0ecSDave Kleikamp 3106617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3107617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3108ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3109617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3110b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3111b31e1552SEric Sandeen "bad superblock"); 3112ac27a0ecSDave Kleikamp brelse(bh); 3113ac27a0ecSDave Kleikamp goto out_bdev; 3114ac27a0ecSDave Kleikamp } 3115ac27a0ecSDave Kleikamp 3116617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3117b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3118ac27a0ecSDave Kleikamp brelse(bh); 3119ac27a0ecSDave Kleikamp goto out_bdev; 3120ac27a0ecSDave Kleikamp } 3121ac27a0ecSDave Kleikamp 3122bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3123ac27a0ecSDave Kleikamp start = sb_block + 1; 3124ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3125ac27a0ecSDave Kleikamp 3126dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3127ac27a0ecSDave Kleikamp start, len, blocksize); 3128ac27a0ecSDave Kleikamp if (!journal) { 3129b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3130ac27a0ecSDave Kleikamp goto out_bdev; 3131ac27a0ecSDave Kleikamp } 3132ac27a0ecSDave Kleikamp journal->j_private = sb; 3133ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3134ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3135ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3136b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3137ac27a0ecSDave Kleikamp goto out_journal; 3138ac27a0ecSDave Kleikamp } 3139ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3140b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3141b31e1552SEric Sandeen "user (unsupported) - %d", 3142ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3143ac27a0ecSDave Kleikamp goto out_journal; 3144ac27a0ecSDave Kleikamp } 3145617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3146617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3147ac27a0ecSDave Kleikamp return journal; 31480b8e58a1SAndreas Dilger 3149ac27a0ecSDave Kleikamp out_journal: 3150dab291afSMingming Cao jbd2_journal_destroy(journal); 3151ac27a0ecSDave Kleikamp out_bdev: 3152617ba13bSMingming Cao ext4_blkdev_put(bdev); 3153ac27a0ecSDave Kleikamp return NULL; 3154ac27a0ecSDave Kleikamp } 3155ac27a0ecSDave Kleikamp 3156617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3157617ba13bSMingming Cao struct ext4_super_block *es, 3158ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3159ac27a0ecSDave Kleikamp { 3160ac27a0ecSDave Kleikamp journal_t *journal; 3161ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3162ac27a0ecSDave Kleikamp dev_t journal_dev; 3163ac27a0ecSDave Kleikamp int err = 0; 3164ac27a0ecSDave Kleikamp int really_read_only; 3165ac27a0ecSDave Kleikamp 31660390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 31670390131bSFrank Mayhar 3168ac27a0ecSDave Kleikamp if (journal_devnum && 3169ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3170b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3171b31e1552SEric Sandeen "numbers have changed"); 3172ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3173ac27a0ecSDave Kleikamp } else 3174ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3175ac27a0ecSDave Kleikamp 3176ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3177ac27a0ecSDave Kleikamp 3178ac27a0ecSDave Kleikamp /* 3179ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3180ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3181ac27a0ecSDave Kleikamp * can get read-write access to the device. 3182ac27a0ecSDave Kleikamp */ 3183617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3184ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3185b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3186b31e1552SEric Sandeen "required on readonly filesystem"); 3187ac27a0ecSDave Kleikamp if (really_read_only) { 3188b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3189b31e1552SEric Sandeen "unavailable, cannot proceed"); 3190ac27a0ecSDave Kleikamp return -EROFS; 3191ac27a0ecSDave Kleikamp } 3192b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 3193b31e1552SEric Sandeen "be enabled during recovery"); 3194ac27a0ecSDave Kleikamp } 3195ac27a0ecSDave Kleikamp } 3196ac27a0ecSDave Kleikamp 3197ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3198b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 3199b31e1552SEric Sandeen "and inode journals!"); 3200ac27a0ecSDave Kleikamp return -EINVAL; 3201ac27a0ecSDave Kleikamp } 3202ac27a0ecSDave Kleikamp 3203ac27a0ecSDave Kleikamp if (journal_inum) { 3204617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3205ac27a0ecSDave Kleikamp return -EINVAL; 3206ac27a0ecSDave Kleikamp } else { 3207617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3208ac27a0ecSDave Kleikamp return -EINVAL; 3209ac27a0ecSDave Kleikamp } 3210ac27a0ecSDave Kleikamp 321190576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 3212b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 32134776004fSTheodore Ts'o 3214ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 3215dab291afSMingming Cao err = jbd2_journal_update_format(journal); 3216ac27a0ecSDave Kleikamp if (err) { 3217b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 3218dab291afSMingming Cao jbd2_journal_destroy(journal); 3219ac27a0ecSDave Kleikamp return err; 3220ac27a0ecSDave Kleikamp } 3221ac27a0ecSDave Kleikamp } 3222ac27a0ecSDave Kleikamp 3223617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3224dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 3225ac27a0ecSDave Kleikamp if (!err) 3226dab291afSMingming Cao err = jbd2_journal_load(journal); 3227ac27a0ecSDave Kleikamp 3228ac27a0ecSDave Kleikamp if (err) { 3229b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 3230dab291afSMingming Cao jbd2_journal_destroy(journal); 3231ac27a0ecSDave Kleikamp return err; 3232ac27a0ecSDave Kleikamp } 3233ac27a0ecSDave Kleikamp 3234617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 3235617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3236ac27a0ecSDave Kleikamp 3237ac27a0ecSDave Kleikamp if (journal_devnum && 3238ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3239ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 3240ac27a0ecSDave Kleikamp 3241ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 3242e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3243ac27a0ecSDave Kleikamp } 3244ac27a0ecSDave Kleikamp 3245ac27a0ecSDave Kleikamp return 0; 3246ac27a0ecSDave Kleikamp } 3247ac27a0ecSDave Kleikamp 3248e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 3249ac27a0ecSDave Kleikamp { 3250e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3251617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 3252c4be0c1dSTakashi Sato int error = 0; 3253ac27a0ecSDave Kleikamp 3254ac27a0ecSDave Kleikamp if (!sbh) 3255c4be0c1dSTakashi Sato return error; 3256914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 3257914258bfSTheodore Ts'o /* 3258914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 3259914258bfSTheodore Ts'o * superblock failed. This could happen because the 3260914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 3261914258bfSTheodore Ts'o * be a transient write error and maybe the block will 3262914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 3263914258bfSTheodore Ts'o * write and hope for the best. 3264914258bfSTheodore Ts'o */ 3265b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 3266b31e1552SEric Sandeen "superblock detected"); 3267914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3268914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3269914258bfSTheodore Ts'o } 327071290b36STheodore Ts'o /* 327171290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 327271290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 327371290b36STheodore Ts'o * write time when we are mounting the root file system 327471290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 327571290b36STheodore Ts'o * for people who are east of GMT and who make their clock 327671290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 327771290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 327871290b36STheodore Ts'o * to complain and force a full file system check. 327971290b36STheodore Ts'o */ 328071290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 3281ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 3282afc32f7eSTheodore Ts'o es->s_kbytes_written = 3283afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 3284afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 3285afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 32865d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 32875d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 32885d1b1b3fSAneesh Kumar K.V es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( 32895d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 32907234ab2aSTheodore Ts'o sb->s_dirt = 0; 3291ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 3292ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 3293914258bfSTheodore Ts'o if (sync) { 3294c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 3295c4be0c1dSTakashi Sato if (error) 3296c4be0c1dSTakashi Sato return error; 3297c4be0c1dSTakashi Sato 3298c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 3299c4be0c1dSTakashi Sato if (error) { 3300b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 3301b31e1552SEric Sandeen "superblock"); 3302914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3303914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3304914258bfSTheodore Ts'o } 3305914258bfSTheodore Ts'o } 3306c4be0c1dSTakashi Sato return error; 3307ac27a0ecSDave Kleikamp } 3308ac27a0ecSDave Kleikamp 3309ac27a0ecSDave Kleikamp /* 3310ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 3311ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 3312ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 3313ac27a0ecSDave Kleikamp */ 3314617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 3315617ba13bSMingming Cao struct ext4_super_block *es) 3316ac27a0ecSDave Kleikamp { 3317617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 3318ac27a0ecSDave Kleikamp 33190390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 33200390131bSFrank Mayhar BUG_ON(journal != NULL); 33210390131bSFrank Mayhar return; 33220390131bSFrank Mayhar } 3323dab291afSMingming Cao jbd2_journal_lock_updates(journal); 33247ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 33257ffe1ea8SHidehiro Kawai goto out; 33267ffe1ea8SHidehiro Kawai 3327617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 3328ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 3329617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3330e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3331ac27a0ecSDave Kleikamp } 33327ffe1ea8SHidehiro Kawai 33337ffe1ea8SHidehiro Kawai out: 3334dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 3335ac27a0ecSDave Kleikamp } 3336ac27a0ecSDave Kleikamp 3337ac27a0ecSDave Kleikamp /* 3338ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 3339ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 3340ac27a0ecSDave Kleikamp * main filesystem now. 3341ac27a0ecSDave Kleikamp */ 3342617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 3343617ba13bSMingming Cao struct ext4_super_block *es) 3344ac27a0ecSDave Kleikamp { 3345ac27a0ecSDave Kleikamp journal_t *journal; 3346ac27a0ecSDave Kleikamp int j_errno; 3347ac27a0ecSDave Kleikamp const char *errstr; 3348ac27a0ecSDave Kleikamp 33490390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 33500390131bSFrank Mayhar 3351617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 3352ac27a0ecSDave Kleikamp 3353ac27a0ecSDave Kleikamp /* 3354ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 3355617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 3356ac27a0ecSDave Kleikamp */ 3357ac27a0ecSDave Kleikamp 3358dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 3359ac27a0ecSDave Kleikamp if (j_errno) { 3360ac27a0ecSDave Kleikamp char nbuf[16]; 3361ac27a0ecSDave Kleikamp 3362617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 336346e665e9SHarvey Harrison ext4_warning(sb, __func__, "Filesystem error recorded " 3364ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 336546e665e9SHarvey Harrison ext4_warning(sb, __func__, "Marking fs in need of " 3366ac27a0ecSDave Kleikamp "filesystem check."); 3367ac27a0ecSDave Kleikamp 3368617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3369617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3370e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3371ac27a0ecSDave Kleikamp 3372dab291afSMingming Cao jbd2_journal_clear_err(journal); 3373ac27a0ecSDave Kleikamp } 3374ac27a0ecSDave Kleikamp } 3375ac27a0ecSDave Kleikamp 3376ac27a0ecSDave Kleikamp /* 3377ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 3378ac27a0ecSDave Kleikamp * and wait on the commit. 3379ac27a0ecSDave Kleikamp */ 3380617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 3381ac27a0ecSDave Kleikamp { 3382ac27a0ecSDave Kleikamp journal_t *journal; 33830390131bSFrank Mayhar int ret = 0; 3384ac27a0ecSDave Kleikamp 3385ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 3386ac27a0ecSDave Kleikamp return 0; 3387ac27a0ecSDave Kleikamp 3388617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 33897234ab2aSTheodore Ts'o if (journal) 3390617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 33910390131bSFrank Mayhar 3392ac27a0ecSDave Kleikamp return ret; 3393ac27a0ecSDave Kleikamp } 3394ac27a0ecSDave Kleikamp 3395617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 3396ac27a0ecSDave Kleikamp { 3397ebc1ac16SChristoph Hellwig lock_super(sb); 3398e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3399ebc1ac16SChristoph Hellwig unlock_super(sb); 34000390131bSFrank Mayhar } 3401ac27a0ecSDave Kleikamp 3402617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 3403ac27a0ecSDave Kleikamp { 340414ce0cb4STheodore Ts'o int ret = 0; 34059eddacf9SJan Kara tid_t target; 34068d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3407ac27a0ecSDave Kleikamp 34089bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 34098d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 34108d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 3411ac27a0ecSDave Kleikamp if (wait) 34128d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 34130390131bSFrank Mayhar } 341414ce0cb4STheodore Ts'o return ret; 3415ac27a0ecSDave Kleikamp } 3416ac27a0ecSDave Kleikamp 3417ac27a0ecSDave Kleikamp /* 3418ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 3419ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 3420ac27a0ecSDave Kleikamp */ 3421c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 3422ac27a0ecSDave Kleikamp { 3423c4be0c1dSTakashi Sato int error = 0; 3424c4be0c1dSTakashi Sato journal_t *journal; 3425ac27a0ecSDave Kleikamp 34269ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 34279ca92389STheodore Ts'o return 0; 34289ca92389STheodore Ts'o 3429c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 3430ac27a0ecSDave Kleikamp 3431ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 3432dab291afSMingming Cao jbd2_journal_lock_updates(journal); 34337ffe1ea8SHidehiro Kawai 34347ffe1ea8SHidehiro Kawai /* 34359ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 34369ca92389STheodore Ts'o * the journal. 34377ffe1ea8SHidehiro Kawai */ 3438c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 34399ca92389STheodore Ts'o if (error < 0) { 34409ca92389STheodore Ts'o out: 34419ca92389STheodore Ts'o jbd2_journal_unlock_updates(journal); 34429ca92389STheodore Ts'o return error; 34430390131bSFrank Mayhar } 3444ac27a0ecSDave Kleikamp 3445ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 3446617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3447e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 3448c4be0c1dSTakashi Sato if (error) 3449c4be0c1dSTakashi Sato goto out; 3450c4be0c1dSTakashi Sato return 0; 3451ac27a0ecSDave Kleikamp } 3452ac27a0ecSDave Kleikamp 3453ac27a0ecSDave Kleikamp /* 3454ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 3455ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 3456ac27a0ecSDave Kleikamp */ 3457c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 3458ac27a0ecSDave Kleikamp { 34599ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 34609ca92389STheodore Ts'o return 0; 34619ca92389STheodore Ts'o 3462ac27a0ecSDave Kleikamp lock_super(sb); 34639ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 3464617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3465e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3466ac27a0ecSDave Kleikamp unlock_super(sb); 3467dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 3468c4be0c1dSTakashi Sato return 0; 3469ac27a0ecSDave Kleikamp } 3470ac27a0ecSDave Kleikamp 3471617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 3472ac27a0ecSDave Kleikamp { 3473617ba13bSMingming Cao struct ext4_super_block *es; 3474617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3475617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 3476ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 3477617ba13bSMingming Cao struct ext4_mount_options old_opts; 34788a266467STheodore Ts'o ext4_group_t g; 3479b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3480ac27a0ecSDave Kleikamp int err; 3481ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3482ac27a0ecSDave Kleikamp int i; 3483ac27a0ecSDave Kleikamp #endif 3484ac27a0ecSDave Kleikamp 3485337eb00aSAlessio Igor Bogani lock_kernel(); 3486337eb00aSAlessio Igor Bogani 3487ac27a0ecSDave Kleikamp /* Store the original options */ 3488bbd6851aSAl Viro lock_super(sb); 3489ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 3490ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 3491ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 3492ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 3493ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 349430773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 349530773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 3496ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3497ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 3498ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3499ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 3500ac27a0ecSDave Kleikamp #endif 3501b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 3502b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 3503ac27a0ecSDave Kleikamp 3504ac27a0ecSDave Kleikamp /* 3505ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 3506ac27a0ecSDave Kleikamp */ 3507b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 3508b3881f74STheodore Ts'o &n_blocks_count, 1)) { 3509ac27a0ecSDave Kleikamp err = -EINVAL; 3510ac27a0ecSDave Kleikamp goto restore_opts; 3511ac27a0ecSDave Kleikamp } 3512ac27a0ecSDave Kleikamp 35134ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 351446e665e9SHarvey Harrison ext4_abort(sb, __func__, "Abort forced by user"); 3515ac27a0ecSDave Kleikamp 3516ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3517617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 3518ac27a0ecSDave Kleikamp 3519ac27a0ecSDave Kleikamp es = sbi->s_es; 3520ac27a0ecSDave Kleikamp 3521b3881f74STheodore Ts'o if (sbi->s_journal) { 3522617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 3523b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3524b3881f74STheodore Ts'o } 3525ac27a0ecSDave Kleikamp 3526ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 3527bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 35284ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 3529ac27a0ecSDave Kleikamp err = -EROFS; 3530ac27a0ecSDave Kleikamp goto restore_opts; 3531ac27a0ecSDave Kleikamp } 3532ac27a0ecSDave Kleikamp 3533ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 3534ac27a0ecSDave Kleikamp /* 3535ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 3536ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 3537ac27a0ecSDave Kleikamp */ 3538ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 3539ac27a0ecSDave Kleikamp 3540ac27a0ecSDave Kleikamp /* 3541ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 3542ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 3543ac27a0ecSDave Kleikamp * mark the partition as valid again. 3544ac27a0ecSDave Kleikamp */ 3545617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 3546617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 3547ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 3548ac27a0ecSDave Kleikamp 3549a63c9eb2STheodore Ts'o if (sbi->s_journal) 3550617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 3551ac27a0ecSDave Kleikamp } else { 3552a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 3553a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 3554ac27a0ecSDave Kleikamp err = -EROFS; 3555ac27a0ecSDave Kleikamp goto restore_opts; 3556ac27a0ecSDave Kleikamp } 3557ead6596bSEric Sandeen /* 35588a266467STheodore Ts'o * Make sure the group descriptor checksums 35590b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 35608a266467STheodore Ts'o */ 35618a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 35628a266467STheodore Ts'o struct ext4_group_desc *gdp = 35638a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 35648a266467STheodore Ts'o 35658a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 3566b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3567b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 35688a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 35698a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 35708a266467STheodore Ts'o err = -EINVAL; 35718a266467STheodore Ts'o goto restore_opts; 35728a266467STheodore Ts'o } 35738a266467STheodore Ts'o } 35748a266467STheodore Ts'o 35758a266467STheodore Ts'o /* 3576ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 3577ead6596bSEric Sandeen * around from a previously readonly bdev mount, 3578ead6596bSEric Sandeen * require a full umount/remount for now. 3579ead6596bSEric Sandeen */ 3580ead6596bSEric Sandeen if (es->s_last_orphan) { 3581b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 3582ead6596bSEric Sandeen "remount RDWR because of unprocessed " 3583ead6596bSEric Sandeen "orphan inode list. Please " 3584b31e1552SEric Sandeen "umount/remount instead"); 3585ead6596bSEric Sandeen err = -EINVAL; 3586ead6596bSEric Sandeen goto restore_opts; 3587ead6596bSEric Sandeen } 3588ead6596bSEric Sandeen 3589ac27a0ecSDave Kleikamp /* 3590ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 3591ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 3592ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 3593ac27a0ecSDave Kleikamp * the partition.) 3594ac27a0ecSDave Kleikamp */ 35950390131bSFrank Mayhar if (sbi->s_journal) 3596617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3597ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3598617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 3599ac27a0ecSDave Kleikamp goto restore_opts; 3600617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 3601ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 3602ac27a0ecSDave Kleikamp } 3603ac27a0ecSDave Kleikamp } 36046fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 36050390131bSFrank Mayhar if (sbi->s_journal == NULL) 3606e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 36070390131bSFrank Mayhar 3608ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3609ac27a0ecSDave Kleikamp /* Release old quota file names */ 3610ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3611ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 3612ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3613ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 3614ac27a0ecSDave Kleikamp #endif 3615bbd6851aSAl Viro unlock_super(sb); 3616337eb00aSAlessio Igor Bogani unlock_kernel(); 3617ac27a0ecSDave Kleikamp return 0; 36180b8e58a1SAndreas Dilger 3619ac27a0ecSDave Kleikamp restore_opts: 3620ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 3621ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 3622ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 3623ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 3624ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 362530773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 362630773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 3627ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3628ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 3629ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 3630ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 3631ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3632ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3633ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 3634ac27a0ecSDave Kleikamp } 3635ac27a0ecSDave Kleikamp #endif 3636bbd6851aSAl Viro unlock_super(sb); 3637337eb00aSAlessio Igor Bogani unlock_kernel(); 3638ac27a0ecSDave Kleikamp return err; 3639ac27a0ecSDave Kleikamp } 3640ac27a0ecSDave Kleikamp 3641617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 3642ac27a0ecSDave Kleikamp { 3643ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 3644617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3645617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 3646960cc398SPekka Enberg u64 fsid; 3647ac27a0ecSDave Kleikamp 36485e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 36495e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 36506bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 36518df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 36525e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 3653ac27a0ecSDave Kleikamp 3654ac27a0ecSDave Kleikamp /* 36555e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 36565e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 36575e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 3658ac27a0ecSDave Kleikamp */ 3659ac27a0ecSDave Kleikamp 3660ac27a0ecSDave Kleikamp /* 3661ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 3662ac27a0ecSDave Kleikamp * overhead 3663ac27a0ecSDave Kleikamp */ 3664ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 3665ac27a0ecSDave Kleikamp 3666ac27a0ecSDave Kleikamp /* 3667ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 3668ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 3669ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 3670ac27a0ecSDave Kleikamp */ 3671ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 3672617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 3673617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 3674ac27a0ecSDave Kleikamp cond_resched(); 3675ac27a0ecSDave Kleikamp } 3676ac27a0ecSDave Kleikamp 3677ac27a0ecSDave Kleikamp /* 3678ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 3679ac27a0ecSDave Kleikamp * bitmap, and an inode table. 3680ac27a0ecSDave Kleikamp */ 36815e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 36825e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 36835e70030dSBadari Pulavarty smp_wmb(); 36846bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 3685ac27a0ecSDave Kleikamp } 3686ac27a0ecSDave Kleikamp 3687617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 3688ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 36895e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 36906bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 36916bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 3692bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 3693bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 3694ac27a0ecSDave Kleikamp buf->f_bavail = 0; 3695ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 369652d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 3697617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 3698960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 3699960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 3700960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 3701960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 37020b8e58a1SAndreas Dilger 3703ac27a0ecSDave Kleikamp return 0; 3704ac27a0ecSDave Kleikamp } 3705ac27a0ecSDave Kleikamp 37060b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 37070b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 3708ac27a0ecSDave Kleikamp * Process 1 Process 2 3709617ba13bSMingming Cao * ext4_create() quota_sync() 3710dab291afSMingming Cao * jbd2_journal_start() write_dquot() 3711a269eb18SJan Kara * vfs_dq_init() down(dqio_mutex) 3712dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 3713ac27a0ecSDave Kleikamp * 3714ac27a0ecSDave Kleikamp */ 3715ac27a0ecSDave Kleikamp 3716ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3717ac27a0ecSDave Kleikamp 3718ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3719ac27a0ecSDave Kleikamp { 3720ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3721ac27a0ecSDave Kleikamp } 3722ac27a0ecSDave Kleikamp 3723617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3724ac27a0ecSDave Kleikamp { 3725ac27a0ecSDave Kleikamp int ret, err; 3726ac27a0ecSDave Kleikamp handle_t *handle; 3727ac27a0ecSDave Kleikamp struct inode *inode; 3728ac27a0ecSDave Kleikamp 3729ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3730617ba13bSMingming Cao handle = ext4_journal_start(inode, 3731617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3732ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3733ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3734ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3735617ba13bSMingming Cao err = ext4_journal_stop(handle); 3736ac27a0ecSDave Kleikamp if (!ret) 3737ac27a0ecSDave Kleikamp ret = err; 3738ac27a0ecSDave Kleikamp return ret; 3739ac27a0ecSDave Kleikamp } 3740ac27a0ecSDave Kleikamp 3741617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3742ac27a0ecSDave Kleikamp { 3743ac27a0ecSDave Kleikamp int ret, err; 3744ac27a0ecSDave Kleikamp handle_t *handle; 3745ac27a0ecSDave Kleikamp 3746617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3747617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3748ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3749ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3750ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 3751617ba13bSMingming Cao err = ext4_journal_stop(handle); 3752ac27a0ecSDave Kleikamp if (!ret) 3753ac27a0ecSDave Kleikamp ret = err; 3754ac27a0ecSDave Kleikamp return ret; 3755ac27a0ecSDave Kleikamp } 3756ac27a0ecSDave Kleikamp 3757617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 3758ac27a0ecSDave Kleikamp { 3759ac27a0ecSDave Kleikamp int ret, err; 3760ac27a0ecSDave Kleikamp handle_t *handle; 3761ac27a0ecSDave Kleikamp 3762617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3763617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 37649c3013e9SJan Kara if (IS_ERR(handle)) { 37659c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 37669c3013e9SJan Kara dquot_release(dquot); 3767ac27a0ecSDave Kleikamp return PTR_ERR(handle); 37689c3013e9SJan Kara } 3769ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 3770617ba13bSMingming Cao err = ext4_journal_stop(handle); 3771ac27a0ecSDave Kleikamp if (!ret) 3772ac27a0ecSDave Kleikamp ret = err; 3773ac27a0ecSDave Kleikamp return ret; 3774ac27a0ecSDave Kleikamp } 3775ac27a0ecSDave Kleikamp 3776617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 3777ac27a0ecSDave Kleikamp { 37782c8be6b2SJan Kara /* Are we journaling quotas? */ 3779617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 3780617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 3781ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 3782617ba13bSMingming Cao return ext4_write_dquot(dquot); 3783ac27a0ecSDave Kleikamp } else { 3784ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 3785ac27a0ecSDave Kleikamp } 3786ac27a0ecSDave Kleikamp } 3787ac27a0ecSDave Kleikamp 3788617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 3789ac27a0ecSDave Kleikamp { 3790ac27a0ecSDave Kleikamp int ret, err; 3791ac27a0ecSDave Kleikamp handle_t *handle; 3792ac27a0ecSDave Kleikamp 3793ac27a0ecSDave Kleikamp /* Data block + inode block */ 3794617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 3795ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3796ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3797ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 3798617ba13bSMingming Cao err = ext4_journal_stop(handle); 3799ac27a0ecSDave Kleikamp if (!ret) 3800ac27a0ecSDave Kleikamp ret = err; 3801ac27a0ecSDave Kleikamp return ret; 3802ac27a0ecSDave Kleikamp } 3803ac27a0ecSDave Kleikamp 3804ac27a0ecSDave Kleikamp /* 3805ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 3806ac27a0ecSDave Kleikamp * the quota file and such... 3807ac27a0ecSDave Kleikamp */ 3808617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 3809ac27a0ecSDave Kleikamp { 3810617ba13bSMingming Cao return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 3811617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 3812ac27a0ecSDave Kleikamp } 3813ac27a0ecSDave Kleikamp 3814ac27a0ecSDave Kleikamp /* 3815ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 3816ac27a0ecSDave Kleikamp */ 3817617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 38188264613dSAl Viro char *name, int remount) 3819ac27a0ecSDave Kleikamp { 3820ac27a0ecSDave Kleikamp int err; 38218264613dSAl Viro struct path path; 3822ac27a0ecSDave Kleikamp 3823ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 3824ac27a0ecSDave Kleikamp return -EINVAL; 38258264613dSAl Viro /* When remounting, no checks are needed and in fact, name is NULL */ 38260623543bSJan Kara if (remount) 38278264613dSAl Viro return vfs_quota_on(sb, type, format_id, name, remount); 38280623543bSJan Kara 38298264613dSAl Viro err = kern_path(name, LOOKUP_FOLLOW, &path); 3830ac27a0ecSDave Kleikamp if (err) 3831ac27a0ecSDave Kleikamp return err; 38320623543bSJan Kara 3833ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 38348264613dSAl Viro if (path.mnt->mnt_sb != sb) { 38358264613dSAl Viro path_put(&path); 3836ac27a0ecSDave Kleikamp return -EXDEV; 3837ac27a0ecSDave Kleikamp } 38380623543bSJan Kara /* Journaling quota? */ 38390623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 38402b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 38418264613dSAl Viro if (path.dentry->d_parent != sb->s_root) 3842b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3843b31e1552SEric Sandeen "Quota file not on filesystem root. " 3844b31e1552SEric Sandeen "Journaled quota will not work"); 38450623543bSJan Kara } 38460623543bSJan Kara 38470623543bSJan Kara /* 38480623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 38490623543bSJan Kara * all updates to the file when we bypass pagecache... 38500623543bSJan Kara */ 38510390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 38520390131bSFrank Mayhar ext4_should_journal_data(path.dentry->d_inode)) { 38530623543bSJan Kara /* 38540623543bSJan Kara * We don't need to lock updates but journal_flush() could 38550623543bSJan Kara * otherwise be livelocked... 38560623543bSJan Kara */ 38570623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 38587ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 38590623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 38607ffe1ea8SHidehiro Kawai if (err) { 38618264613dSAl Viro path_put(&path); 38627ffe1ea8SHidehiro Kawai return err; 38637ffe1ea8SHidehiro Kawai } 38640623543bSJan Kara } 38650623543bSJan Kara 38668264613dSAl Viro err = vfs_quota_on_path(sb, type, format_id, &path); 38678264613dSAl Viro path_put(&path); 386877e69dacSAl Viro return err; 3869ac27a0ecSDave Kleikamp } 3870ac27a0ecSDave Kleikamp 3871ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 3872ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 3873ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 3874ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 3875617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 3876ac27a0ecSDave Kleikamp size_t len, loff_t off) 3877ac27a0ecSDave Kleikamp { 3878ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3879725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3880ac27a0ecSDave Kleikamp int err = 0; 3881ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3882ac27a0ecSDave Kleikamp int tocopy; 3883ac27a0ecSDave Kleikamp size_t toread; 3884ac27a0ecSDave Kleikamp struct buffer_head *bh; 3885ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 3886ac27a0ecSDave Kleikamp 3887ac27a0ecSDave Kleikamp if (off > i_size) 3888ac27a0ecSDave Kleikamp return 0; 3889ac27a0ecSDave Kleikamp if (off+len > i_size) 3890ac27a0ecSDave Kleikamp len = i_size-off; 3891ac27a0ecSDave Kleikamp toread = len; 3892ac27a0ecSDave Kleikamp while (toread > 0) { 3893ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 3894ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 3895617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 3896ac27a0ecSDave Kleikamp if (err) 3897ac27a0ecSDave Kleikamp return err; 3898ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 3899ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 3900ac27a0ecSDave Kleikamp else 3901ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 3902ac27a0ecSDave Kleikamp brelse(bh); 3903ac27a0ecSDave Kleikamp offset = 0; 3904ac27a0ecSDave Kleikamp toread -= tocopy; 3905ac27a0ecSDave Kleikamp data += tocopy; 3906ac27a0ecSDave Kleikamp blk++; 3907ac27a0ecSDave Kleikamp } 3908ac27a0ecSDave Kleikamp return len; 3909ac27a0ecSDave Kleikamp } 3910ac27a0ecSDave Kleikamp 3911ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 3912ac27a0ecSDave Kleikamp * enough credits) */ 3913617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 3914ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 3915ac27a0ecSDave Kleikamp { 3916ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3917725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3918ac27a0ecSDave Kleikamp int err = 0; 3919ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3920ac27a0ecSDave Kleikamp int tocopy; 3921617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 3922ac27a0ecSDave Kleikamp size_t towrite = len; 3923ac27a0ecSDave Kleikamp struct buffer_head *bh; 3924ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 3925ac27a0ecSDave Kleikamp 39260390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 3927b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 3928b31e1552SEric Sandeen " cancelled because transaction is not started", 39299c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 39309c3013e9SJan Kara return -EIO; 39319c3013e9SJan Kara } 3932ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 3933ac27a0ecSDave Kleikamp while (towrite > 0) { 3934ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < towrite ? 3935ac27a0ecSDave Kleikamp sb->s_blocksize - offset : towrite; 3936617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 3937ac27a0ecSDave Kleikamp if (!bh) 3938ac27a0ecSDave Kleikamp goto out; 3939ac27a0ecSDave Kleikamp if (journal_quota) { 3940617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 3941ac27a0ecSDave Kleikamp if (err) { 3942ac27a0ecSDave Kleikamp brelse(bh); 3943ac27a0ecSDave Kleikamp goto out; 3944ac27a0ecSDave Kleikamp } 3945ac27a0ecSDave Kleikamp } 3946ac27a0ecSDave Kleikamp lock_buffer(bh); 3947ac27a0ecSDave Kleikamp memcpy(bh->b_data+offset, data, tocopy); 3948ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 3949ac27a0ecSDave Kleikamp unlock_buffer(bh); 3950ac27a0ecSDave Kleikamp if (journal_quota) 39510390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 3952ac27a0ecSDave Kleikamp else { 3953ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 3954678aaf48SJan Kara err = ext4_jbd2_file_inode(handle, inode); 3955ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 3956ac27a0ecSDave Kleikamp } 3957ac27a0ecSDave Kleikamp brelse(bh); 3958ac27a0ecSDave Kleikamp if (err) 3959ac27a0ecSDave Kleikamp goto out; 3960ac27a0ecSDave Kleikamp offset = 0; 3961ac27a0ecSDave Kleikamp towrite -= tocopy; 3962ac27a0ecSDave Kleikamp data += tocopy; 3963ac27a0ecSDave Kleikamp blk++; 3964ac27a0ecSDave Kleikamp } 3965ac27a0ecSDave Kleikamp out: 39664d04e4fbSJan Kara if (len == towrite) { 39674d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 3968ac27a0ecSDave Kleikamp return err; 39694d04e4fbSJan Kara } 3970ac27a0ecSDave Kleikamp if (inode->i_size < off+len-towrite) { 3971ac27a0ecSDave Kleikamp i_size_write(inode, off+len-towrite); 3972617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 3973ac27a0ecSDave Kleikamp } 3974ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 3975617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 3976ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 3977ac27a0ecSDave Kleikamp return len - towrite; 3978ac27a0ecSDave Kleikamp } 3979ac27a0ecSDave Kleikamp 3980ac27a0ecSDave Kleikamp #endif 3981ac27a0ecSDave Kleikamp 39820b8e58a1SAndreas Dilger static int ext4_get_sb(struct file_system_type *fs_type, int flags, 39830b8e58a1SAndreas Dilger const char *dev_name, void *data, struct vfsmount *mnt) 3984ac27a0ecSDave Kleikamp { 3985617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); 3986ac27a0ecSDave Kleikamp } 3987ac27a0ecSDave Kleikamp 3988a214238dSTheodore Ts'o #if !defined(CONTIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 398924b58424STheodore Ts'o static struct file_system_type ext2_fs_type = { 399024b58424STheodore Ts'o .owner = THIS_MODULE, 399124b58424STheodore Ts'o .name = "ext2", 399224b58424STheodore Ts'o .get_sb = ext4_get_sb, 399324b58424STheodore Ts'o .kill_sb = kill_block_super, 399424b58424STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 399524b58424STheodore Ts'o }; 399624b58424STheodore Ts'o 399724b58424STheodore Ts'o static inline void register_as_ext2(void) 399824b58424STheodore Ts'o { 399924b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 400024b58424STheodore Ts'o if (err) 400124b58424STheodore Ts'o printk(KERN_WARNING 400224b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 400324b58424STheodore Ts'o } 400424b58424STheodore Ts'o 400524b58424STheodore Ts'o static inline void unregister_as_ext2(void) 400624b58424STheodore Ts'o { 400724b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 400824b58424STheodore Ts'o } 400951b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 401024b58424STheodore Ts'o #else 401124b58424STheodore Ts'o static inline void register_as_ext2(void) { } 401224b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 401324b58424STheodore Ts'o #endif 401424b58424STheodore Ts'o 4015a214238dSTheodore Ts'o #if !defined(CONTIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 401624b58424STheodore Ts'o static struct file_system_type ext3_fs_type = { 401724b58424STheodore Ts'o .owner = THIS_MODULE, 401824b58424STheodore Ts'o .name = "ext3", 401924b58424STheodore Ts'o .get_sb = ext4_get_sb, 402024b58424STheodore Ts'o .kill_sb = kill_block_super, 402124b58424STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 402224b58424STheodore Ts'o }; 402324b58424STheodore Ts'o 402424b58424STheodore Ts'o static inline void register_as_ext3(void) 402524b58424STheodore Ts'o { 402624b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 402724b58424STheodore Ts'o if (err) 402824b58424STheodore Ts'o printk(KERN_WARNING 402924b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 403024b58424STheodore Ts'o } 403124b58424STheodore Ts'o 403224b58424STheodore Ts'o static inline void unregister_as_ext3(void) 403324b58424STheodore Ts'o { 403424b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 403524b58424STheodore Ts'o } 403651b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 403724b58424STheodore Ts'o #else 403824b58424STheodore Ts'o static inline void register_as_ext3(void) { } 403924b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 404024b58424STheodore Ts'o #endif 404124b58424STheodore Ts'o 404203010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 4043ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 404403010a33STheodore Ts'o .name = "ext4", 4045617ba13bSMingming Cao .get_sb = ext4_get_sb, 4046ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 4047ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 4048ac27a0ecSDave Kleikamp }; 4049ac27a0ecSDave Kleikamp 4050617ba13bSMingming Cao static int __init init_ext4_fs(void) 4051ac27a0ecSDave Kleikamp { 4052c9de560dSAlex Tomas int err; 4053c9de560dSAlex Tomas 40546fd058f7STheodore Ts'o err = init_ext4_system_zone(); 40556fd058f7STheodore Ts'o if (err) 40566fd058f7STheodore Ts'o return err; 40573197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 40583197ebdbSTheodore Ts'o if (!ext4_kset) 40596fd058f7STheodore Ts'o goto out4; 40609f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 4061c9de560dSAlex Tomas err = init_ext4_mballoc(); 4062ac27a0ecSDave Kleikamp if (err) 40636fd058f7STheodore Ts'o goto out3; 4064c9de560dSAlex Tomas 4065c9de560dSAlex Tomas err = init_ext4_xattr(); 4066c9de560dSAlex Tomas if (err) 4067c9de560dSAlex Tomas goto out2; 4068ac27a0ecSDave Kleikamp err = init_inodecache(); 4069ac27a0ecSDave Kleikamp if (err) 4070ac27a0ecSDave Kleikamp goto out1; 407124b58424STheodore Ts'o register_as_ext2(); 407224b58424STheodore Ts'o register_as_ext3(); 407303010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 4074ac27a0ecSDave Kleikamp if (err) 4075ac27a0ecSDave Kleikamp goto out; 4076ac27a0ecSDave Kleikamp return 0; 4077ac27a0ecSDave Kleikamp out: 407824b58424STheodore Ts'o unregister_as_ext2(); 407924b58424STheodore Ts'o unregister_as_ext3(); 4080ac27a0ecSDave Kleikamp destroy_inodecache(); 4081ac27a0ecSDave Kleikamp out1: 4082617ba13bSMingming Cao exit_ext4_xattr(); 4083c9de560dSAlex Tomas out2: 4084c9de560dSAlex Tomas exit_ext4_mballoc(); 40856fd058f7STheodore Ts'o out3: 40866fd058f7STheodore Ts'o remove_proc_entry("fs/ext4", NULL); 40876fd058f7STheodore Ts'o kset_unregister(ext4_kset); 40886fd058f7STheodore Ts'o out4: 40896fd058f7STheodore Ts'o exit_ext4_system_zone(); 4090ac27a0ecSDave Kleikamp return err; 4091ac27a0ecSDave Kleikamp } 4092ac27a0ecSDave Kleikamp 4093617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 4094ac27a0ecSDave Kleikamp { 409524b58424STheodore Ts'o unregister_as_ext2(); 409624b58424STheodore Ts'o unregister_as_ext3(); 409703010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 4098ac27a0ecSDave Kleikamp destroy_inodecache(); 4099617ba13bSMingming Cao exit_ext4_xattr(); 4100c9de560dSAlex Tomas exit_ext4_mballoc(); 41019f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 41023197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 41036fd058f7STheodore Ts'o exit_ext4_system_zone(); 4104ac27a0ecSDave Kleikamp } 4105ac27a0ecSDave Kleikamp 4106ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 410783982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 4108ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 4109617ba13bSMingming Cao module_init(init_ext4_fs) 4110617ba13bSMingming Cao module_exit(exit_ext4_fs) 4111