1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 24dab291afSMingming Cao #include <linux/jbd2.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 28ac27a0ecSDave Kleikamp #include <linux/parser.h> 29ac27a0ecSDave Kleikamp #include <linux/smp_lock.h> 30ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 31a5694255SChristoph Hellwig #include <linux/exportfs.h> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 389f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 393197ebdbSTheodore Ts'o #include <linux/ctype.h> 401330593eSVignesh Babu #include <linux/log2.h> 41717d50e4SAndreas Dilger #include <linux/crc16.h> 42ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 43ac27a0ecSDave Kleikamp 443dcf5451SChristoph Hellwig #include "ext4.h" 453dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 46ac27a0ecSDave Kleikamp #include "xattr.h" 47ac27a0ecSDave Kleikamp #include "acl.h" 483661d286STheodore Ts'o #include "mballoc.h" 49ac27a0ecSDave Kleikamp 509bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 519bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 529bffad1eSTheodore Ts'o 539f6200bbSTheodore Ts'o struct proc_dir_entry *ext4_proc_root; 543197ebdbSTheodore Ts'o static struct kset *ext4_kset; 559f6200bbSTheodore Ts'o 56617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 57ac27a0ecSDave Kleikamp unsigned long journal_devnum); 58e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 59617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 60617ba13bSMingming Cao struct ext4_super_block *es); 61617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 62617ba13bSMingming Cao struct ext4_super_block *es); 63617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 64617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 65ac27a0ecSDave Kleikamp char nbuf[16]); 66617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 67617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 68c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 69617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 70c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 71ac27a0ecSDave Kleikamp 72bd81d8eeSLaurent Vivier 738fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 748fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 75bd81d8eeSLaurent Vivier { 763a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 778fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 788fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 79bd81d8eeSLaurent Vivier } 80bd81d8eeSLaurent Vivier 818fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 828fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 83bd81d8eeSLaurent Vivier { 845272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 858fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 868fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 87bd81d8eeSLaurent Vivier } 88bd81d8eeSLaurent Vivier 898fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 908fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 91bd81d8eeSLaurent Vivier { 925272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 938fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 948fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 95bd81d8eeSLaurent Vivier } 96bd81d8eeSLaurent Vivier 97560671a0SAneesh Kumar K.V __u32 ext4_free_blks_count(struct super_block *sb, 98560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 99560671a0SAneesh Kumar K.V { 100560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 101560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 102560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 103560671a0SAneesh Kumar K.V } 104560671a0SAneesh Kumar K.V 105560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 106560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 107560671a0SAneesh Kumar K.V { 108560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 109560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 110560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 111560671a0SAneesh Kumar K.V } 112560671a0SAneesh Kumar K.V 113560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 114560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 115560671a0SAneesh Kumar K.V { 116560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 117560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 118560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 119560671a0SAneesh Kumar K.V } 120560671a0SAneesh Kumar K.V 121560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 122560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 123560671a0SAneesh Kumar K.V { 124560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 125560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 126560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 127560671a0SAneesh Kumar K.V } 128560671a0SAneesh Kumar K.V 1298fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 1308fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 131bd81d8eeSLaurent Vivier { 1323a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 1338fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1348fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 135bd81d8eeSLaurent Vivier } 136bd81d8eeSLaurent Vivier 1378fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1388fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 139bd81d8eeSLaurent Vivier { 1405272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1418fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1428fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 143bd81d8eeSLaurent Vivier } 144bd81d8eeSLaurent Vivier 1458fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1468fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 147bd81d8eeSLaurent Vivier { 1485272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1498fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1508fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 151bd81d8eeSLaurent Vivier } 152bd81d8eeSLaurent Vivier 153560671a0SAneesh Kumar K.V void ext4_free_blks_set(struct super_block *sb, 154560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 155560671a0SAneesh Kumar K.V { 156560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 157560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 158560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 159560671a0SAneesh Kumar K.V } 160560671a0SAneesh Kumar K.V 161560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 162560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 163560671a0SAneesh Kumar K.V { 164560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 165560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 166560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 167560671a0SAneesh Kumar K.V } 168560671a0SAneesh Kumar K.V 169560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 170560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 171560671a0SAneesh Kumar K.V { 172560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 173560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 174560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 175560671a0SAneesh Kumar K.V } 176560671a0SAneesh Kumar K.V 177560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 178560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 179560671a0SAneesh Kumar K.V { 180560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 181560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 182560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 183560671a0SAneesh Kumar K.V } 184560671a0SAneesh Kumar K.V 185d3d1faf6SCurt Wohlgemuth 186d3d1faf6SCurt Wohlgemuth /* Just increment the non-pointer handle value */ 187d3d1faf6SCurt Wohlgemuth static handle_t *ext4_get_nojournal(void) 188d3d1faf6SCurt Wohlgemuth { 189d3d1faf6SCurt Wohlgemuth handle_t *handle = current->journal_info; 190d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 191d3d1faf6SCurt Wohlgemuth 192d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); 193d3d1faf6SCurt Wohlgemuth 194d3d1faf6SCurt Wohlgemuth ref_cnt++; 195d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 196d3d1faf6SCurt Wohlgemuth 197d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 198d3d1faf6SCurt Wohlgemuth return handle; 199d3d1faf6SCurt Wohlgemuth } 200d3d1faf6SCurt Wohlgemuth 201d3d1faf6SCurt Wohlgemuth 202d3d1faf6SCurt Wohlgemuth /* Decrement the non-pointer handle value */ 203d3d1faf6SCurt Wohlgemuth static void ext4_put_nojournal(handle_t *handle) 204d3d1faf6SCurt Wohlgemuth { 205d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 206d3d1faf6SCurt Wohlgemuth 207d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt == 0); 208d3d1faf6SCurt Wohlgemuth 209d3d1faf6SCurt Wohlgemuth ref_cnt--; 210d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 211d3d1faf6SCurt Wohlgemuth 212d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 213d3d1faf6SCurt Wohlgemuth } 214d3d1faf6SCurt Wohlgemuth 215ac27a0ecSDave Kleikamp /* 216dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 217ac27a0ecSDave Kleikamp * 218ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 219ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 220ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 221ac27a0ecSDave Kleikamp * appropriate. 222ac27a0ecSDave Kleikamp */ 223617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 224ac27a0ecSDave Kleikamp { 225ac27a0ecSDave Kleikamp journal_t *journal; 226ac27a0ecSDave Kleikamp 227ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 228ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 229ac27a0ecSDave Kleikamp 230ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 231ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 232ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 233617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2340390131bSFrank Mayhar if (journal) { 235ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 2360b8e58a1SAndreas Dilger ext4_abort(sb, __func__, "Detected aborted journal"); 237ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 238ac27a0ecSDave Kleikamp } 239dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 240ac27a0ecSDave Kleikamp } 241d3d1faf6SCurt Wohlgemuth return ext4_get_nojournal(); 2420390131bSFrank Mayhar } 243ac27a0ecSDave Kleikamp 244ac27a0ecSDave Kleikamp /* 245ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 246dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 247ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 248ac27a0ecSDave Kleikamp * appropriate. 249ac27a0ecSDave Kleikamp */ 250617ba13bSMingming Cao int __ext4_journal_stop(const char *where, handle_t *handle) 251ac27a0ecSDave Kleikamp { 252ac27a0ecSDave Kleikamp struct super_block *sb; 253ac27a0ecSDave Kleikamp int err; 254ac27a0ecSDave Kleikamp int rc; 255ac27a0ecSDave Kleikamp 2560390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 257d3d1faf6SCurt Wohlgemuth ext4_put_nojournal(handle); 2580390131bSFrank Mayhar return 0; 2590390131bSFrank Mayhar } 260ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 261ac27a0ecSDave Kleikamp err = handle->h_err; 262dab291afSMingming Cao rc = jbd2_journal_stop(handle); 263ac27a0ecSDave Kleikamp 264ac27a0ecSDave Kleikamp if (!err) 265ac27a0ecSDave Kleikamp err = rc; 266ac27a0ecSDave Kleikamp if (err) 267617ba13bSMingming Cao __ext4_std_error(sb, where, err); 268ac27a0ecSDave Kleikamp return err; 269ac27a0ecSDave Kleikamp } 270ac27a0ecSDave Kleikamp 271617ba13bSMingming Cao void ext4_journal_abort_handle(const char *caller, const char *err_fn, 272ac27a0ecSDave Kleikamp struct buffer_head *bh, handle_t *handle, int err) 273ac27a0ecSDave Kleikamp { 274ac27a0ecSDave Kleikamp char nbuf[16]; 275617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 276ac27a0ecSDave Kleikamp 2770390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 2780390131bSFrank Mayhar 279ac27a0ecSDave Kleikamp if (bh) 280ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 281ac27a0ecSDave Kleikamp 282ac27a0ecSDave Kleikamp if (!handle->h_err) 283ac27a0ecSDave Kleikamp handle->h_err = err; 284ac27a0ecSDave Kleikamp 285ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 286ac27a0ecSDave Kleikamp return; 287ac27a0ecSDave Kleikamp 288ac27a0ecSDave Kleikamp printk(KERN_ERR "%s: aborting transaction: %s in %s\n", 289ac27a0ecSDave Kleikamp caller, errstr, err_fn); 290ac27a0ecSDave Kleikamp 291dab291afSMingming Cao jbd2_journal_abort_handle(handle); 292ac27a0ecSDave Kleikamp } 293ac27a0ecSDave Kleikamp 294ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 295ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 296ac27a0ecSDave Kleikamp * 297ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 298617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 299ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 300ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 301ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 302ac27a0ecSDave Kleikamp * write out the superblock safely. 303ac27a0ecSDave Kleikamp * 304dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 305ac27a0ecSDave Kleikamp * the journal instead. On recovery, the journal will compain about 306ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 307ac27a0ecSDave Kleikamp */ 308ac27a0ecSDave Kleikamp 309617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 310ac27a0ecSDave Kleikamp { 311617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 312ac27a0ecSDave Kleikamp 313617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 314617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 315ac27a0ecSDave Kleikamp 316ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 317ac27a0ecSDave Kleikamp return; 318ac27a0ecSDave Kleikamp 319ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 320617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 321ac27a0ecSDave Kleikamp 3224ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 323ac27a0ecSDave Kleikamp if (journal) 324dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 325ac27a0ecSDave Kleikamp } 326ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 327b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 328ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 329ac27a0ecSDave Kleikamp } 330e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 331ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 332617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 333ac27a0ecSDave Kleikamp sb->s_id); 334ac27a0ecSDave Kleikamp } 335ac27a0ecSDave Kleikamp 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 6066fd058f7STheodore Ts'o ext4_release_system_zone(sb); 607c9de560dSAlex Tomas ext4_mb_release(sb); 608a86c6181SAlex Tomas ext4_ext_release(sb); 609617ba13bSMingming Cao ext4_xattr_put_super(sb); 6100390131bSFrank Mayhar if (sbi->s_journal) { 611ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 61247b4a50bSJan Kara sbi->s_journal = NULL; 613ef2cabf7SHidehiro Kawai if (err < 0) 6140390131bSFrank Mayhar ext4_abort(sb, __func__, 6150390131bSFrank Mayhar "Couldn't clean up the journal"); 6160390131bSFrank Mayhar } 617ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 618617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 619ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 620e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 621ac27a0ecSDave Kleikamp } 622240799cdSTheodore Ts'o if (sbi->s_proc) { 6239f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 624240799cdSTheodore Ts'o } 6253197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 626ac27a0ecSDave Kleikamp 627ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 628ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 629ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 630c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 631c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 632c5ca7c76STheodore Ts'o else 633772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 634ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 635ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 636ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 6376bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 638ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 639ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 640ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 641ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 642ac27a0ecSDave Kleikamp #endif 643ac27a0ecSDave Kleikamp 644ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 645ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 646ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 647ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 648ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 649ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 650ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 651ac27a0ecSDave Kleikamp 652f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 653ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 654ac27a0ecSDave Kleikamp /* 655ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 656ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 657ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 658ac27a0ecSDave Kleikamp */ 659ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 660f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 661617ba13bSMingming Cao ext4_blkdev_remove(sbi); 662ac27a0ecSDave Kleikamp } 663ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 6643197ebdbSTheodore Ts'o /* 6653197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 6663197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 6673197ebdbSTheodore Ts'o */ 6683197ebdbSTheodore Ts'o unlock_kernel(); 6693197ebdbSTheodore Ts'o unlock_super(sb); 6703197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 6713197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 672705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 673ac27a0ecSDave Kleikamp kfree(sbi); 674ac27a0ecSDave Kleikamp } 675ac27a0ecSDave Kleikamp 676e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 677ac27a0ecSDave Kleikamp 678ac27a0ecSDave Kleikamp /* 679ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 680ac27a0ecSDave Kleikamp */ 681617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 682ac27a0ecSDave Kleikamp { 683617ba13bSMingming Cao struct ext4_inode_info *ei; 684ac27a0ecSDave Kleikamp 685e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 686ac27a0ecSDave Kleikamp if (!ei) 687ac27a0ecSDave Kleikamp return NULL; 6880b8e58a1SAndreas Dilger 689ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 69091246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 691a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 692c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 693c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 6940390131bSFrank Mayhar /* 6950390131bSFrank Mayhar * Note: We can be called before EXT4_SB(sb)->s_journal is set, 6960390131bSFrank Mayhar * therefore it can be null here. Don't check it, just initialize 6970390131bSFrank Mayhar * jinode. 6980390131bSFrank Mayhar */ 699678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 700d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 701d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 702d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 703d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 704d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 7058d5d02e6SMingming Cao INIT_LIST_HEAD(&ei->i_aio_dio_complete_list); 7068d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 7070b8e58a1SAndreas Dilger 708ac27a0ecSDave Kleikamp return &ei->vfs_inode; 709ac27a0ecSDave Kleikamp } 710ac27a0ecSDave Kleikamp 711617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 712ac27a0ecSDave Kleikamp { 7139f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 714b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 715b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 716b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 7179f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 7189f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 7199f7dd93dSVasily Averin true); 7209f7dd93dSVasily Averin dump_stack(); 7219f7dd93dSVasily Averin } 722617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 723ac27a0ecSDave Kleikamp } 724ac27a0ecSDave Kleikamp 72551cc5068SAlexey Dobriyan static void init_once(void *foo) 726ac27a0ecSDave Kleikamp { 727617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 728ac27a0ecSDave Kleikamp 729ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 73003010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 731ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 732ac27a0ecSDave Kleikamp #endif 7330e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 734ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 735ac27a0ecSDave Kleikamp } 736ac27a0ecSDave Kleikamp 737ac27a0ecSDave Kleikamp static int init_inodecache(void) 738ac27a0ecSDave Kleikamp { 739617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 740617ba13bSMingming Cao sizeof(struct ext4_inode_info), 741ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 742ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 74320c2df83SPaul Mundt init_once); 744617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 745ac27a0ecSDave Kleikamp return -ENOMEM; 746ac27a0ecSDave Kleikamp return 0; 747ac27a0ecSDave Kleikamp } 748ac27a0ecSDave Kleikamp 749ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 750ac27a0ecSDave Kleikamp { 751617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 752ac27a0ecSDave Kleikamp } 753ac27a0ecSDave Kleikamp 754617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 755ac27a0ecSDave Kleikamp { 756c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 7570390131bSFrank Mayhar if (EXT4_JOURNAL(inode)) 758678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 759678aaf48SJan Kara &EXT4_I(inode)->jinode); 760ac27a0ecSDave Kleikamp } 761ac27a0ecSDave Kleikamp 7622b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 7632b2d6d01STheodore Ts'o struct super_block *sb) 764ac27a0ecSDave Kleikamp { 765ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 766617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 767ac27a0ecSDave Kleikamp 768ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) 769ac27a0ecSDave Kleikamp seq_printf(seq, ",jqfmt=%s", 770ac27a0ecSDave Kleikamp (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold" : "vfsv0"); 771ac27a0ecSDave Kleikamp 772ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 773ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 774ac27a0ecSDave Kleikamp 775ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 776ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 777ac27a0ecSDave Kleikamp 778617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) 779ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 780ac27a0ecSDave Kleikamp 781617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) 782ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 783ac27a0ecSDave Kleikamp #endif 784ac27a0ecSDave Kleikamp } 785ac27a0ecSDave Kleikamp 786d9c9bef1SMiklos Szeredi /* 787d9c9bef1SMiklos Szeredi * Show an option if 788d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 789d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 790d9c9bef1SMiklos Szeredi */ 791617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 792ac27a0ecSDave Kleikamp { 793aa22df2cSAneesh Kumar K.V int def_errors; 794aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 795ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 796d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 797d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 798d9c9bef1SMiklos Szeredi 799d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 800aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 801d9c9bef1SMiklos Szeredi 802d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 803d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 804d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 805d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 806aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 807d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 808d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 809d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 810d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 811d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 812d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 813d9c9bef1SMiklos Szeredi } 814d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 815d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 816d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 817d9c9bef1SMiklos Szeredi } 818bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 819d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 820bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 821d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 822bb4f397aSAneesh Kumar K.V } 823bb4f397aSAneesh Kumar K.V } 824aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 825bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 826aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 827d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 828aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 829d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 830aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 831d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 832d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 833d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 83403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 835aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 836aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 837d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 838d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 839d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 840d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 841d9c9bef1SMiklos Szeredi } 842d9c9bef1SMiklos Szeredi #endif 84303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 844aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 845d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 846d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 847d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 848d9c9bef1SMiklos Szeredi #endif 84930773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 850d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 851d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 852d9c9bef1SMiklos Szeredi } 85330773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 85430773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 85530773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 85630773840STheodore Ts'o } 85730773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 85830773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 85930773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 86030773840STheodore Ts'o } 86130773840STheodore Ts'o 862571640caSEric Sandeen /* 863571640caSEric Sandeen * We're changing the default of barrier mount option, so 864571640caSEric Sandeen * let's always display its mount state so it's clear what its 865571640caSEric Sandeen * status is. 866571640caSEric Sandeen */ 867571640caSEric Sandeen seq_puts(seq, ",barrier="); 868571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 869cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 870cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 871d9c9bef1SMiklos Szeredi if (test_opt(sb, NOBH)) 872d9c9bef1SMiklos Szeredi seq_puts(seq, ",nobh"); 87325ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 87425ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 875dd919b98SAneesh Kumar K.V if (!test_opt(sb, DELALLOC)) 876dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 877dd919b98SAneesh Kumar K.V 878ac27a0ecSDave Kleikamp 879cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 880cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 881aa22df2cSAneesh Kumar K.V /* 882aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 883aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 884aa22df2cSAneesh Kumar K.V */ 885617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 886ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 887617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 888ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 889617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 890ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 891ac27a0ecSDave Kleikamp 892240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 893240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 894240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 895240799cdSTheodore Ts'o 8965bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 8975bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 8985bf5683aSHidehiro Kawai 899afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 90006705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 901afd4672dSTheodore Ts'o 902617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 9030b8e58a1SAndreas Dilger 904ac27a0ecSDave Kleikamp return 0; 905ac27a0ecSDave Kleikamp } 906ac27a0ecSDave Kleikamp 9071b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 9081b961ac0SChristoph Hellwig u64 ino, u32 generation) 909ac27a0ecSDave Kleikamp { 910ac27a0ecSDave Kleikamp struct inode *inode; 911ac27a0ecSDave Kleikamp 912617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 913ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 914617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 915ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 916ac27a0ecSDave Kleikamp 917ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 918ac27a0ecSDave Kleikamp * 919617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 920ac27a0ecSDave Kleikamp * deleted, so we should be safe. 921ac27a0ecSDave Kleikamp * 922ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 923ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 924ac27a0ecSDave Kleikamp */ 9251d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 9261d1fe1eeSDavid Howells if (IS_ERR(inode)) 9271d1fe1eeSDavid Howells return ERR_CAST(inode); 9281d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 929ac27a0ecSDave Kleikamp iput(inode); 930ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 931ac27a0ecSDave Kleikamp } 9321b961ac0SChristoph Hellwig 9331b961ac0SChristoph Hellwig return inode; 934ac27a0ecSDave Kleikamp } 9351b961ac0SChristoph Hellwig 9361b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 9371b961ac0SChristoph Hellwig int fh_len, int fh_type) 9381b961ac0SChristoph Hellwig { 9391b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 9401b961ac0SChristoph Hellwig ext4_nfs_get_inode); 9411b961ac0SChristoph Hellwig } 9421b961ac0SChristoph Hellwig 9431b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 9441b961ac0SChristoph Hellwig int fh_len, int fh_type) 9451b961ac0SChristoph Hellwig { 9461b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 9471b961ac0SChristoph Hellwig ext4_nfs_get_inode); 948ac27a0ecSDave Kleikamp } 949ac27a0ecSDave Kleikamp 950c39a7f84SToshiyuki Okajima /* 951c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 952c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 953c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 954c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 955c39a7f84SToshiyuki Okajima */ 9560b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 9570b8e58a1SAndreas Dilger gfp_t wait) 958c39a7f84SToshiyuki Okajima { 959c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 960c39a7f84SToshiyuki Okajima 961c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 962c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 963c39a7f84SToshiyuki Okajima return 0; 964c39a7f84SToshiyuki Okajima if (journal) 965c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 966c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 967c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 968c39a7f84SToshiyuki Okajima } 969c39a7f84SToshiyuki Okajima 970ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 971ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 972ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 973ac27a0ecSDave Kleikamp 974617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 975617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 976617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 977617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 978617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 9796f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 9806f28e087SJan Kara char *path, int remount); 981617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 982617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 983ac27a0ecSDave Kleikamp size_t len, loff_t off); 984617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 985ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 986ac27a0ecSDave Kleikamp 98761e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 988edf72453SJan Kara .initialize = dquot_initialize, 989edf72453SJan Kara .drop = dquot_drop, 990ac27a0ecSDave Kleikamp .alloc_space = dquot_alloc_space, 99160e58e0fSMingming Cao .reserve_space = dquot_reserve_space, 99260e58e0fSMingming Cao .claim_space = dquot_claim_space, 99360e58e0fSMingming Cao .release_rsv = dquot_release_reserved_space, 99460e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 995ac27a0ecSDave Kleikamp .alloc_inode = dquot_alloc_inode, 996ac27a0ecSDave Kleikamp .free_space = dquot_free_space, 997ac27a0ecSDave Kleikamp .free_inode = dquot_free_inode, 998ac27a0ecSDave Kleikamp .transfer = dquot_transfer, 999617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1000617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1001617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1002617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1003a5b5ee32SJan Kara .write_info = ext4_write_info, 1004a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1005a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1006ac27a0ecSDave Kleikamp }; 1007ac27a0ecSDave Kleikamp 10080d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1009617ba13bSMingming Cao .quota_on = ext4_quota_on, 1010ac27a0ecSDave Kleikamp .quota_off = vfs_quota_off, 1011ac27a0ecSDave Kleikamp .quota_sync = vfs_quota_sync, 1012ac27a0ecSDave Kleikamp .get_info = vfs_get_dqinfo, 1013ac27a0ecSDave Kleikamp .set_info = vfs_set_dqinfo, 1014ac27a0ecSDave Kleikamp .get_dqblk = vfs_get_dqblk, 1015ac27a0ecSDave Kleikamp .set_dqblk = vfs_set_dqblk 1016ac27a0ecSDave Kleikamp }; 1017ac27a0ecSDave Kleikamp #endif 1018ac27a0ecSDave Kleikamp 1019ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1020617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1021617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1022617ba13bSMingming Cao .write_inode = ext4_write_inode, 1023617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 1024617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 1025617ba13bSMingming Cao .put_super = ext4_put_super, 1026617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1027c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1028c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1029617ba13bSMingming Cao .statfs = ext4_statfs, 1030617ba13bSMingming Cao .remount_fs = ext4_remount, 1031617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 1032617ba13bSMingming Cao .show_options = ext4_show_options, 1033ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1034617ba13bSMingming Cao .quota_read = ext4_quota_read, 1035617ba13bSMingming Cao .quota_write = ext4_quota_write, 1036ac27a0ecSDave Kleikamp #endif 1037c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1038ac27a0ecSDave Kleikamp }; 1039ac27a0ecSDave Kleikamp 10409ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 10419ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 10429ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 10439ca92389STheodore Ts'o .write_inode = ext4_write_inode, 10449ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 10459ca92389STheodore Ts'o .delete_inode = ext4_delete_inode, 10469ca92389STheodore Ts'o .write_super = ext4_write_super, 10479ca92389STheodore Ts'o .put_super = ext4_put_super, 10489ca92389STheodore Ts'o .statfs = ext4_statfs, 10499ca92389STheodore Ts'o .remount_fs = ext4_remount, 10509ca92389STheodore Ts'o .clear_inode = ext4_clear_inode, 10519ca92389STheodore Ts'o .show_options = ext4_show_options, 10529ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 10539ca92389STheodore Ts'o .quota_read = ext4_quota_read, 10549ca92389STheodore Ts'o .quota_write = ext4_quota_write, 10559ca92389STheodore Ts'o #endif 10569ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 10579ca92389STheodore Ts'o }; 10589ca92389STheodore Ts'o 105939655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 10601b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 10611b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1062617ba13bSMingming Cao .get_parent = ext4_get_parent, 1063ac27a0ecSDave Kleikamp }; 1064ac27a0ecSDave Kleikamp 1065ac27a0ecSDave Kleikamp enum { 1066ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1067ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 106801436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1069ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 107006705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 107130773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1072c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1073818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1074ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1075*296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1076ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 1077ac27a0ecSDave Kleikamp Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, 107806705bffSTheodore Ts'o Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, Opt_resize, 107906705bffSTheodore Ts'o Opt_usrquota, Opt_grpquota, Opt_i_version, 108001436ef2STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, 10816fd058f7STheodore Ts'o Opt_block_validity, Opt_noblock_validity, 1082b3881f74STheodore Ts'o Opt_inode_readahead_blks, Opt_journal_ioprio 1083ac27a0ecSDave Kleikamp }; 1084ac27a0ecSDave Kleikamp 1085a447c093SSteven Whitehouse static const match_table_t tokens = { 1086ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1087ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1088ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1089ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1090ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1091ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1092ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1093ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1094ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1095ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1096ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1097ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1098ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1099ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1100ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1101ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1102ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1103ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1104ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1105ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1106ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1107ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1108ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1109ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 111030773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 111130773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1112ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1113ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1114818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1115818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1116ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1117ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1118ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1119ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 11205bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 11215bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1122ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1123ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1124ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1125ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1126ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1127ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 1128ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1129ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1130ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1131ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1132ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 113306705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 113406705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 113525ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1136c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1137ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 113864769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1139dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 11406fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 11416fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1142240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1143b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1144afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 114506705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 114606705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1147f3f12faaSJosef Bacik {Opt_err, NULL}, 1148ac27a0ecSDave Kleikamp }; 1149ac27a0ecSDave Kleikamp 1150617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1151ac27a0ecSDave Kleikamp { 1152617ba13bSMingming Cao ext4_fsblk_t sb_block; 1153ac27a0ecSDave Kleikamp char *options = (char *) *data; 1154ac27a0ecSDave Kleikamp 1155ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1156ac27a0ecSDave Kleikamp return 1; /* Default location */ 11570b8e58a1SAndreas Dilger 1158ac27a0ecSDave Kleikamp options += 3; 11590b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1160ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1161ac27a0ecSDave Kleikamp if (*options && *options != ',') { 11624776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1163ac27a0ecSDave Kleikamp (char *) *data); 1164ac27a0ecSDave Kleikamp return 1; 1165ac27a0ecSDave Kleikamp } 1166ac27a0ecSDave Kleikamp if (*options == ',') 1167ac27a0ecSDave Kleikamp options++; 1168ac27a0ecSDave Kleikamp *data = (void *) options; 11690b8e58a1SAndreas Dilger 1170ac27a0ecSDave Kleikamp return sb_block; 1171ac27a0ecSDave Kleikamp } 1172ac27a0ecSDave Kleikamp 1173b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1174b3881f74STheodore Ts'o 1175ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1176c3191067STheodore Ts'o unsigned long *journal_devnum, 1177b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1178617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1179ac27a0ecSDave Kleikamp { 1180617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1181ac27a0ecSDave Kleikamp char *p; 1182ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1183ac27a0ecSDave Kleikamp int data_opt = 0; 1184ac27a0ecSDave Kleikamp int option; 1185ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1186dfc5d03fSJan Kara int qtype, qfmt; 1187ac27a0ecSDave Kleikamp char *qname; 1188ac27a0ecSDave Kleikamp #endif 1189ac27a0ecSDave Kleikamp 1190ac27a0ecSDave Kleikamp if (!options) 1191ac27a0ecSDave Kleikamp return 1; 1192ac27a0ecSDave Kleikamp 1193ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1194ac27a0ecSDave Kleikamp int token; 1195ac27a0ecSDave Kleikamp if (!*p) 1196ac27a0ecSDave Kleikamp continue; 1197ac27a0ecSDave Kleikamp 1198ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1199ac27a0ecSDave Kleikamp switch (token) { 1200ac27a0ecSDave Kleikamp case Opt_bsd_df: 1201ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, MINIX_DF); 1202ac27a0ecSDave Kleikamp break; 1203ac27a0ecSDave Kleikamp case Opt_minix_df: 1204ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, MINIX_DF); 1205ac27a0ecSDave Kleikamp break; 1206ac27a0ecSDave Kleikamp case Opt_grpid: 1207ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1208ac27a0ecSDave Kleikamp break; 1209ac27a0ecSDave Kleikamp case Opt_nogrpid: 1210ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPID); 1211ac27a0ecSDave Kleikamp break; 1212ac27a0ecSDave Kleikamp case Opt_resuid: 1213ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1214ac27a0ecSDave Kleikamp return 0; 1215ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1216ac27a0ecSDave Kleikamp break; 1217ac27a0ecSDave Kleikamp case Opt_resgid: 1218ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1219ac27a0ecSDave Kleikamp return 0; 1220ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1221ac27a0ecSDave Kleikamp break; 1222ac27a0ecSDave Kleikamp case Opt_sb: 1223ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1224ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1225ac27a0ecSDave Kleikamp break; 1226ac27a0ecSDave Kleikamp case Opt_err_panic: 1227ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1228ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1229ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1230ac27a0ecSDave Kleikamp break; 1231ac27a0ecSDave Kleikamp case Opt_err_ro: 1232ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1233ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1234ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1235ac27a0ecSDave Kleikamp break; 1236ac27a0ecSDave Kleikamp case Opt_err_cont: 1237ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1238ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1239ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_CONT); 1240ac27a0ecSDave Kleikamp break; 1241ac27a0ecSDave Kleikamp case Opt_nouid32: 1242ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 1243ac27a0ecSDave Kleikamp break; 1244ac27a0ecSDave Kleikamp case Opt_debug: 1245ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1246ac27a0ecSDave Kleikamp break; 1247ac27a0ecSDave Kleikamp case Opt_oldalloc: 1248ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, OLDALLOC); 1249ac27a0ecSDave Kleikamp break; 1250ac27a0ecSDave Kleikamp case Opt_orlov: 1251ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, OLDALLOC); 1252ac27a0ecSDave Kleikamp break; 125303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1254ac27a0ecSDave Kleikamp case Opt_user_xattr: 1255ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 1256ac27a0ecSDave Kleikamp break; 1257ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1258ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, XATTR_USER); 1259ac27a0ecSDave Kleikamp break; 1260ac27a0ecSDave Kleikamp #else 1261ac27a0ecSDave Kleikamp case Opt_user_xattr: 1262ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1263b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1264ac27a0ecSDave Kleikamp break; 1265ac27a0ecSDave Kleikamp #endif 126603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1267ac27a0ecSDave Kleikamp case Opt_acl: 1268ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1269ac27a0ecSDave Kleikamp break; 1270ac27a0ecSDave Kleikamp case Opt_noacl: 1271ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1272ac27a0ecSDave Kleikamp break; 1273ac27a0ecSDave Kleikamp #else 1274ac27a0ecSDave Kleikamp case Opt_acl: 1275ac27a0ecSDave Kleikamp case Opt_noacl: 1276b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1277ac27a0ecSDave Kleikamp break; 1278ac27a0ecSDave Kleikamp #endif 1279ac27a0ecSDave Kleikamp case Opt_journal_update: 1280ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1281ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1282ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1283ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1284ac27a0ecSDave Kleikamp journal file. */ 1285ac27a0ecSDave Kleikamp if (is_remount) { 1286b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1287b31e1552SEric Sandeen "Cannot specify journal on remount"); 1288ac27a0ecSDave Kleikamp return 0; 1289ac27a0ecSDave Kleikamp } 1290ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); 1291ac27a0ecSDave Kleikamp break; 1292ac27a0ecSDave Kleikamp case Opt_journal_dev: 1293ac27a0ecSDave Kleikamp if (is_remount) { 1294b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1295b31e1552SEric Sandeen "Cannot specify journal on remount"); 1296ac27a0ecSDave Kleikamp return 0; 1297ac27a0ecSDave Kleikamp } 1298ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1299ac27a0ecSDave Kleikamp return 0; 1300ac27a0ecSDave Kleikamp *journal_devnum = option; 1301ac27a0ecSDave Kleikamp break; 1302818d276cSGirish Shilamkar case Opt_journal_checksum: 1303d0646f7bSTheodore Ts'o break; /* Kept for backwards compatibility */ 1304818d276cSGirish Shilamkar case Opt_journal_async_commit: 1305818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1306818d276cSGirish Shilamkar break; 1307ac27a0ecSDave Kleikamp case Opt_noload: 1308ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOLOAD); 1309ac27a0ecSDave Kleikamp break; 1310ac27a0ecSDave Kleikamp case Opt_commit: 1311ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1312ac27a0ecSDave Kleikamp return 0; 1313ac27a0ecSDave Kleikamp if (option < 0) 1314ac27a0ecSDave Kleikamp return 0; 1315ac27a0ecSDave Kleikamp if (option == 0) 1316cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1317ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1318ac27a0ecSDave Kleikamp break; 131930773840STheodore Ts'o case Opt_max_batch_time: 132030773840STheodore Ts'o if (match_int(&args[0], &option)) 132130773840STheodore Ts'o return 0; 132230773840STheodore Ts'o if (option < 0) 132330773840STheodore Ts'o return 0; 132430773840STheodore Ts'o if (option == 0) 132530773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 132630773840STheodore Ts'o sbi->s_max_batch_time = option; 132730773840STheodore Ts'o break; 132830773840STheodore Ts'o case Opt_min_batch_time: 132930773840STheodore Ts'o if (match_int(&args[0], &option)) 133030773840STheodore Ts'o return 0; 133130773840STheodore Ts'o if (option < 0) 133230773840STheodore Ts'o return 0; 133330773840STheodore Ts'o sbi->s_min_batch_time = option; 133430773840STheodore Ts'o break; 1335ac27a0ecSDave Kleikamp case Opt_data_journal: 1336617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1337ac27a0ecSDave Kleikamp goto datacheck; 1338ac27a0ecSDave Kleikamp case Opt_data_ordered: 1339617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1340ac27a0ecSDave Kleikamp goto datacheck; 1341ac27a0ecSDave Kleikamp case Opt_data_writeback: 1342617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1343ac27a0ecSDave Kleikamp datacheck: 1344ac27a0ecSDave Kleikamp if (is_remount) { 1345617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) 1346ac27a0ecSDave Kleikamp != data_opt) { 1347b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1348b31e1552SEric Sandeen "Cannot change data mode on remount"); 1349ac27a0ecSDave Kleikamp return 0; 1350ac27a0ecSDave Kleikamp } 1351ac27a0ecSDave Kleikamp } else { 1352617ba13bSMingming Cao sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; 1353ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1354ac27a0ecSDave Kleikamp } 1355ac27a0ecSDave Kleikamp break; 13565bf5683aSHidehiro Kawai case Opt_data_err_abort: 13575bf5683aSHidehiro Kawai set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 13585bf5683aSHidehiro Kawai break; 13595bf5683aSHidehiro Kawai case Opt_data_err_ignore: 13605bf5683aSHidehiro Kawai clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 13615bf5683aSHidehiro Kawai break; 1362ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1363ac27a0ecSDave Kleikamp case Opt_usrjquota: 1364ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1365ac27a0ecSDave Kleikamp goto set_qf_name; 1366ac27a0ecSDave Kleikamp case Opt_grpjquota: 1367ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1368ac27a0ecSDave Kleikamp set_qf_name: 136917bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1370dfc5d03fSJan Kara !sbi->s_qf_names[qtype]) { 1371b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1372b31e1552SEric Sandeen "Cannot change journaled " 1373b31e1552SEric Sandeen "quota options when quota turned on"); 1374ac27a0ecSDave Kleikamp return 0; 1375ac27a0ecSDave Kleikamp } 1376ac27a0ecSDave Kleikamp qname = match_strdup(&args[0]); 1377ac27a0ecSDave Kleikamp if (!qname) { 1378b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1379b31e1552SEric Sandeen "Not enough memory for " 1380b31e1552SEric Sandeen "storing quotafile name"); 1381ac27a0ecSDave Kleikamp return 0; 1382ac27a0ecSDave Kleikamp } 1383ac27a0ecSDave Kleikamp if (sbi->s_qf_names[qtype] && 1384ac27a0ecSDave Kleikamp strcmp(sbi->s_qf_names[qtype], qname)) { 1385b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1386b31e1552SEric Sandeen "%s quota file already " 1387b31e1552SEric Sandeen "specified", QTYPE2NAME(qtype)); 1388ac27a0ecSDave Kleikamp kfree(qname); 1389ac27a0ecSDave Kleikamp return 0; 1390ac27a0ecSDave Kleikamp } 1391ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = qname; 1392ac27a0ecSDave Kleikamp if (strchr(sbi->s_qf_names[qtype], '/')) { 1393b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1394b31e1552SEric Sandeen "quotafile must be on " 1395b31e1552SEric Sandeen "filesystem root"); 1396ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[qtype]); 1397ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1398ac27a0ecSDave Kleikamp return 0; 1399ac27a0ecSDave Kleikamp } 1400ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1401ac27a0ecSDave Kleikamp break; 1402ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1403ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1404ac27a0ecSDave Kleikamp goto clear_qf_name; 1405ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1406ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1407ac27a0ecSDave Kleikamp clear_qf_name: 140817bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1409dfc5d03fSJan Kara sbi->s_qf_names[qtype]) { 1410b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 14112c8be6b2SJan Kara "journaled quota options when " 1412b31e1552SEric Sandeen "quota turned on"); 1413ac27a0ecSDave Kleikamp return 0; 1414ac27a0ecSDave Kleikamp } 1415ac27a0ecSDave Kleikamp /* 1416ac27a0ecSDave Kleikamp * The space will be released later when all options 1417ac27a0ecSDave Kleikamp * are confirmed to be correct 1418ac27a0ecSDave Kleikamp */ 1419ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1420ac27a0ecSDave Kleikamp break; 1421ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1422dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1423dfc5d03fSJan Kara goto set_qf_format; 1424ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1425dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 1426dfc5d03fSJan Kara set_qf_format: 142717bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1428dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1429b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1430dfc5d03fSJan Kara "journaled quota options when " 1431b31e1552SEric Sandeen "quota turned on"); 1432dfc5d03fSJan Kara return 0; 1433dfc5d03fSJan Kara } 1434dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1435ac27a0ecSDave Kleikamp break; 1436ac27a0ecSDave Kleikamp case Opt_quota: 1437ac27a0ecSDave Kleikamp case Opt_usrquota: 1438ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1439ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1440ac27a0ecSDave Kleikamp break; 1441ac27a0ecSDave Kleikamp case Opt_grpquota: 1442ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1443ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1444ac27a0ecSDave Kleikamp break; 1445ac27a0ecSDave Kleikamp case Opt_noquota: 144617bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1447b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1448b31e1552SEric Sandeen "options when quota turned on"); 1449ac27a0ecSDave Kleikamp return 0; 1450ac27a0ecSDave Kleikamp } 1451ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1452ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1453ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1454ac27a0ecSDave Kleikamp break; 1455ac27a0ecSDave Kleikamp #else 1456ac27a0ecSDave Kleikamp case Opt_quota: 1457ac27a0ecSDave Kleikamp case Opt_usrquota: 1458ac27a0ecSDave Kleikamp case Opt_grpquota: 1459b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1460b31e1552SEric Sandeen "quota options not supported"); 1461cd59e7b9SJan Kara break; 1462ac27a0ecSDave Kleikamp case Opt_usrjquota: 1463ac27a0ecSDave Kleikamp case Opt_grpjquota: 1464ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1465ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1466ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1467ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1468b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1469b31e1552SEric Sandeen "journaled quota options not supported"); 1470ac27a0ecSDave Kleikamp break; 1471ac27a0ecSDave Kleikamp case Opt_noquota: 1472ac27a0ecSDave Kleikamp break; 1473ac27a0ecSDave Kleikamp #endif 1474ac27a0ecSDave Kleikamp case Opt_abort: 14754ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1476ac27a0ecSDave Kleikamp break; 147706705bffSTheodore Ts'o case Opt_nobarrier: 147806705bffSTheodore Ts'o clear_opt(sbi->s_mount_opt, BARRIER); 147906705bffSTheodore Ts'o break; 1480ac27a0ecSDave Kleikamp case Opt_barrier: 148106705bffSTheodore Ts'o if (match_int(&args[0], &option)) { 148206705bffSTheodore Ts'o set_opt(sbi->s_mount_opt, BARRIER); 148306705bffSTheodore Ts'o break; 148406705bffSTheodore Ts'o } 1485ac27a0ecSDave Kleikamp if (option) 1486ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1487ac27a0ecSDave Kleikamp else 1488ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1489ac27a0ecSDave Kleikamp break; 1490ac27a0ecSDave Kleikamp case Opt_ignore: 1491ac27a0ecSDave Kleikamp break; 1492ac27a0ecSDave Kleikamp case Opt_resize: 1493ac27a0ecSDave Kleikamp if (!is_remount) { 1494b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1495b31e1552SEric Sandeen "resize option only available " 1496b31e1552SEric Sandeen "for remount"); 1497ac27a0ecSDave Kleikamp return 0; 1498ac27a0ecSDave Kleikamp } 1499ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1500ac27a0ecSDave Kleikamp return 0; 1501ac27a0ecSDave Kleikamp *n_blocks_count = option; 1502ac27a0ecSDave Kleikamp break; 1503ac27a0ecSDave Kleikamp case Opt_nobh: 1504ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1505ac27a0ecSDave Kleikamp break; 1506ac27a0ecSDave Kleikamp case Opt_bh: 1507ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1508ac27a0ecSDave Kleikamp break; 150925ec56b5SJean Noel Cordenner case Opt_i_version: 151025ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 151125ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 151225ec56b5SJean Noel Cordenner break; 1513dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1514dd919b98SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 1515dd919b98SAneesh Kumar K.V break; 1516c9de560dSAlex Tomas case Opt_stripe: 1517c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1518c9de560dSAlex Tomas return 0; 1519c9de560dSAlex Tomas if (option < 0) 1520c9de560dSAlex Tomas return 0; 1521c9de560dSAlex Tomas sbi->s_stripe = option; 1522c9de560dSAlex Tomas break; 152364769240SAlex Tomas case Opt_delalloc: 152464769240SAlex Tomas set_opt(sbi->s_mount_opt, DELALLOC); 152564769240SAlex Tomas break; 15266fd058f7STheodore Ts'o case Opt_block_validity: 15276fd058f7STheodore Ts'o set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 15286fd058f7STheodore Ts'o break; 15296fd058f7STheodore Ts'o case Opt_noblock_validity: 15306fd058f7STheodore Ts'o clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 15316fd058f7STheodore Ts'o break; 1532240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1533240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1534240799cdSTheodore Ts'o return 0; 1535240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1536240799cdSTheodore Ts'o return 0; 1537f7c43950STheodore Ts'o if (!is_power_of_2(option)) { 1538b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1539b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1540b31e1552SEric Sandeen " must be a power of 2"); 15413197ebdbSTheodore Ts'o return 0; 15423197ebdbSTheodore Ts'o } 1543240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1544240799cdSTheodore Ts'o break; 1545b3881f74STheodore Ts'o case Opt_journal_ioprio: 1546b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1547b3881f74STheodore Ts'o return 0; 1548b3881f74STheodore Ts'o if (option < 0 || option > 7) 1549b3881f74STheodore Ts'o break; 1550b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1551b3881f74STheodore Ts'o option); 1552b3881f74STheodore Ts'o break; 155306705bffSTheodore Ts'o case Opt_noauto_da_alloc: 155406705bffSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 155506705bffSTheodore Ts'o break; 1556afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 155706705bffSTheodore Ts'o if (match_int(&args[0], &option)) { 155806705bffSTheodore Ts'o clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); 155906705bffSTheodore Ts'o break; 156006705bffSTheodore Ts'o } 1561afd4672dSTheodore Ts'o if (option) 1562afd4672dSTheodore Ts'o clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); 1563afd4672dSTheodore Ts'o else 1564afd4672dSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 1565afd4672dSTheodore Ts'o break; 1566ac27a0ecSDave Kleikamp default: 1567b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1568b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1569b31e1552SEric Sandeen "or missing value", p); 1570ac27a0ecSDave Kleikamp return 0; 1571ac27a0ecSDave Kleikamp } 1572ac27a0ecSDave Kleikamp } 1573ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1574ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1575617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && 1576ac27a0ecSDave Kleikamp sbi->s_qf_names[USRQUOTA]) 1577ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1578ac27a0ecSDave Kleikamp 1579617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && 1580ac27a0ecSDave Kleikamp sbi->s_qf_names[GRPQUOTA]) 1581ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1582ac27a0ecSDave Kleikamp 1583ac27a0ecSDave Kleikamp if ((sbi->s_qf_names[USRQUOTA] && 1584617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || 1585ac27a0ecSDave Kleikamp (sbi->s_qf_names[GRPQUOTA] && 1586617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { 1587b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1588b31e1552SEric Sandeen "format mixing"); 1589ac27a0ecSDave Kleikamp return 0; 1590ac27a0ecSDave Kleikamp } 1591ac27a0ecSDave Kleikamp 1592ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1593b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1594b31e1552SEric Sandeen "not specified"); 1595ac27a0ecSDave Kleikamp return 0; 1596ac27a0ecSDave Kleikamp } 1597ac27a0ecSDave Kleikamp } else { 1598ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1599b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 16002c8be6b2SJan Kara "specified with no journaling " 1601b31e1552SEric Sandeen "enabled"); 1602ac27a0ecSDave Kleikamp return 0; 1603ac27a0ecSDave Kleikamp } 1604ac27a0ecSDave Kleikamp } 1605ac27a0ecSDave Kleikamp #endif 1606ac27a0ecSDave Kleikamp return 1; 1607ac27a0ecSDave Kleikamp } 1608ac27a0ecSDave Kleikamp 1609617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1610ac27a0ecSDave Kleikamp int read_only) 1611ac27a0ecSDave Kleikamp { 1612617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1613ac27a0ecSDave Kleikamp int res = 0; 1614ac27a0ecSDave Kleikamp 1615617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1616b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1617b31e1552SEric Sandeen "forcing read-only mode"); 1618ac27a0ecSDave Kleikamp res = MS_RDONLY; 1619ac27a0ecSDave Kleikamp } 1620ac27a0ecSDave Kleikamp if (read_only) 1621ac27a0ecSDave Kleikamp return res; 1622617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1623b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1624b31e1552SEric Sandeen "running e2fsck is recommended"); 1625617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1626b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1627b31e1552SEric Sandeen "warning: mounting fs with errors, " 1628b31e1552SEric Sandeen "running e2fsck is recommended"); 1629ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1630ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1631ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1632b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1633b31e1552SEric Sandeen "warning: maximal mount count reached, " 1634b31e1552SEric Sandeen "running e2fsck is recommended"); 1635ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1636ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1637ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1638b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1639b31e1552SEric Sandeen "warning: checktime reached, " 1640b31e1552SEric Sandeen "running e2fsck is recommended"); 16410390131bSFrank Mayhar if (!sbi->s_journal) 1642216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1643ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1644617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1645e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1646ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1647617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 16480390131bSFrank Mayhar if (sbi->s_journal) 1649617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1650ac27a0ecSDave Kleikamp 1651e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1652ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1653a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 16547f4520ccSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x]\n", 1655ac27a0ecSDave Kleikamp sb->s_blocksize, 1656ac27a0ecSDave Kleikamp sbi->s_groups_count, 1657617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1658617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1659ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1660ac27a0ecSDave Kleikamp 1661ac27a0ecSDave Kleikamp return res; 1662ac27a0ecSDave Kleikamp } 1663ac27a0ecSDave Kleikamp 1664772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1665772cb7c8SJose R. Santos { 1666772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1667772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1668772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1669772cb7c8SJose R. Santos ext4_group_t flex_group; 1670772cb7c8SJose R. Santos int groups_per_flex = 0; 1671c5ca7c76STheodore Ts'o size_t size; 1672772cb7c8SJose R. Santos int i; 1673772cb7c8SJose R. Santos 1674772cb7c8SJose R. Santos if (!sbi->s_es->s_log_groups_per_flex) { 1675772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1676772cb7c8SJose R. Santos return 1; 1677772cb7c8SJose R. Santos } 1678772cb7c8SJose R. Santos 1679772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1680772cb7c8SJose R. Santos groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1681772cb7c8SJose R. Santos 1682c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1683c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1684d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1685d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1686c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 1687c5ca7c76STheodore Ts'o sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); 1688c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 1689c5ca7c76STheodore Ts'o sbi->s_flex_groups = vmalloc(size); 1690c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) 1691c5ca7c76STheodore Ts'o memset(sbi->s_flex_groups, 0, size); 1692c5ca7c76STheodore Ts'o } 1693772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1694b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory for " 1695b31e1552SEric Sandeen "%u flex groups", flex_group_count); 1696772cb7c8SJose R. Santos goto failed; 1697772cb7c8SJose R. Santos } 1698772cb7c8SJose R. Santos 1699772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 170088b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1701772cb7c8SJose R. Santos 1702772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 17037ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 17047ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 17057ad9bb65STheodore Ts'o atomic_add(ext4_free_blks_count(sb, gdp), 17067ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_blocks); 17077ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 17087ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1709772cb7c8SJose R. Santos } 1710772cb7c8SJose R. Santos 1711772cb7c8SJose R. Santos return 1; 1712772cb7c8SJose R. Santos failed: 1713772cb7c8SJose R. Santos return 0; 1714772cb7c8SJose R. Santos } 1715772cb7c8SJose R. Santos 1716717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1717717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1718717d50e4SAndreas Dilger { 1719717d50e4SAndreas Dilger __u16 crc = 0; 1720717d50e4SAndreas Dilger 1721717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1722717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1723717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1724717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1725717d50e4SAndreas Dilger 1726717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1727717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1728717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1729717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1730717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1731717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1732717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1733717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1734717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1735717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1736717d50e4SAndreas Dilger offset); 1737717d50e4SAndreas Dilger } 1738717d50e4SAndreas Dilger 1739717d50e4SAndreas Dilger return cpu_to_le16(crc); 1740717d50e4SAndreas Dilger } 1741717d50e4SAndreas Dilger 1742717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1743717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1744717d50e4SAndreas Dilger { 1745717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1746717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1747717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1748717d50e4SAndreas Dilger return 0; 1749717d50e4SAndreas Dilger 1750717d50e4SAndreas Dilger return 1; 1751717d50e4SAndreas Dilger } 1752717d50e4SAndreas Dilger 1753ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1754617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1755ac27a0ecSDave Kleikamp { 1756617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1757617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1758617ba13bSMingming Cao ext4_fsblk_t last_block; 1759bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1760bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1761bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1762ce421581SJose R. Santos int flexbg_flag = 0; 1763fd2d4291SAvantika Mathur ext4_group_t i; 1764ac27a0ecSDave Kleikamp 1765ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1766ce421581SJose R. Santos flexbg_flag = 1; 1767ce421581SJose R. Santos 1768617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 1769ac27a0ecSDave Kleikamp 1770197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1771197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1772197cd65aSAkinobu Mita 1773ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1774bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1775ac27a0ecSDave Kleikamp else 1776ac27a0ecSDave Kleikamp last_block = first_block + 1777617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1778ac27a0ecSDave Kleikamp 17798fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 17802b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 1781b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1782a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 1783b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 1784ac27a0ecSDave Kleikamp return 0; 1785ac27a0ecSDave Kleikamp } 17868fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 17872b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 1788b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1789a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 1790b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 1791ac27a0ecSDave Kleikamp return 0; 1792ac27a0ecSDave Kleikamp } 17938fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1794bd81d8eeSLaurent Vivier if (inode_table < first_block || 17952b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 1796b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1797a9df9a49STheodore Ts'o "Inode table for group %u not in group " 1798b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 1799ac27a0ecSDave Kleikamp return 0; 1800ac27a0ecSDave Kleikamp } 1801955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 1802717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1803b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1804b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 1805fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1806fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 18077ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 1808955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1809717d50e4SAndreas Dilger return 0; 1810717d50e4SAndreas Dilger } 18117ee1ec4cSLi Zefan } 1812955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1813ce421581SJose R. Santos if (!flexbg_flag) 1814617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 1815ac27a0ecSDave Kleikamp } 1816ac27a0ecSDave Kleikamp 1817bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1818617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 1819ac27a0ecSDave Kleikamp return 1; 1820ac27a0ecSDave Kleikamp } 1821ac27a0ecSDave Kleikamp 1822617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1823ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1824ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1825ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1826ac27a0ecSDave Kleikamp * 1827ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1828ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1829ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1830ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1831ac27a0ecSDave Kleikamp * 1832ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1833ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1834ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1835617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1836ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1837ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1838ac27a0ecSDave Kleikamp */ 1839617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 1840617ba13bSMingming Cao struct ext4_super_block *es) 1841ac27a0ecSDave Kleikamp { 1842ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1843ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1844ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1845ac27a0ecSDave Kleikamp int i; 1846ac27a0ecSDave Kleikamp #endif 1847ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1848ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1849ac27a0ecSDave Kleikamp return; 1850ac27a0ecSDave Kleikamp } 1851ac27a0ecSDave Kleikamp 1852a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1853b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 1854b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 1855a8f48a95SEric Sandeen return; 1856a8f48a95SEric Sandeen } 1857a8f48a95SEric Sandeen 1858617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1859ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1860ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1861ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1862ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1863ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1864ac27a0ecSDave Kleikamp return; 1865ac27a0ecSDave Kleikamp } 1866ac27a0ecSDave Kleikamp 1867ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1868b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 1869ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 1870ac27a0ecSDave Kleikamp } 1871ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1872ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 1873ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 1874ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 1875ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1876617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 1877617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 1878ac27a0ecSDave Kleikamp if (ret < 0) 1879b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1880b31e1552SEric Sandeen "Cannot turn on journaled " 1881b31e1552SEric Sandeen "quota: error %d", ret); 1882ac27a0ecSDave Kleikamp } 1883ac27a0ecSDave Kleikamp } 1884ac27a0ecSDave Kleikamp #endif 1885ac27a0ecSDave Kleikamp 1886ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 1887ac27a0ecSDave Kleikamp struct inode *inode; 1888ac27a0ecSDave Kleikamp 188997bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 189097bd42b9SJosef Bacik if (IS_ERR(inode)) { 1891ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1892ac27a0ecSDave Kleikamp break; 1893ac27a0ecSDave Kleikamp } 1894ac27a0ecSDave Kleikamp 1895617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 1896a269eb18SJan Kara vfs_dq_init(inode); 1897ac27a0ecSDave Kleikamp if (inode->i_nlink) { 1898b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 1899b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 190046e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 1901e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 1902ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 1903617ba13bSMingming Cao ext4_truncate(inode); 1904ac27a0ecSDave Kleikamp nr_truncates++; 1905ac27a0ecSDave Kleikamp } else { 1906b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 1907b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 190846e665e9SHarvey Harrison __func__, inode->i_ino); 1909ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 1910ac27a0ecSDave Kleikamp inode->i_ino); 1911ac27a0ecSDave Kleikamp nr_orphans++; 1912ac27a0ecSDave Kleikamp } 1913ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 1914ac27a0ecSDave Kleikamp } 1915ac27a0ecSDave Kleikamp 1916ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 1917ac27a0ecSDave Kleikamp 1918ac27a0ecSDave Kleikamp if (nr_orphans) 1919b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 1920b31e1552SEric Sandeen PLURAL(nr_orphans)); 1921ac27a0ecSDave Kleikamp if (nr_truncates) 1922b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 1923b31e1552SEric Sandeen PLURAL(nr_truncates)); 1924ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1925ac27a0ecSDave Kleikamp /* Turn quotas off */ 1926ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1927ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 19286f28e087SJan Kara vfs_quota_off(sb, i, 0); 1929ac27a0ecSDave Kleikamp } 1930ac27a0ecSDave Kleikamp #endif 1931ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 1932ac27a0ecSDave Kleikamp } 19330b8e58a1SAndreas Dilger 1934cd2291a4SEric Sandeen /* 1935cd2291a4SEric Sandeen * Maximal extent format file size. 1936cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 1937cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 1938cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 1939cd2291a4SEric Sandeen * so that won't be a limiting factor. 1940cd2291a4SEric Sandeen * 1941cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 1942cd2291a4SEric Sandeen */ 1943f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 1944cd2291a4SEric Sandeen { 1945cd2291a4SEric Sandeen loff_t res; 1946cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 1947cd2291a4SEric Sandeen 1948cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 1949f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 1950cd2291a4SEric Sandeen /* 195190c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 1952cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 1953cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 1954cd2291a4SEric Sandeen */ 1955cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 1956cd2291a4SEric Sandeen 1957cd2291a4SEric Sandeen /* total blocks in file system block size */ 1958cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 1959cd2291a4SEric Sandeen upper_limit <<= blkbits; 1960cd2291a4SEric Sandeen } 1961cd2291a4SEric Sandeen 1962cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 1963cd2291a4SEric Sandeen res = 1LL << 32; 1964cd2291a4SEric Sandeen res <<= blkbits; 1965cd2291a4SEric Sandeen res -= 1; 1966cd2291a4SEric Sandeen 1967cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 1968cd2291a4SEric Sandeen if (res > upper_limit) 1969cd2291a4SEric Sandeen res = upper_limit; 1970cd2291a4SEric Sandeen 1971cd2291a4SEric Sandeen return res; 1972cd2291a4SEric Sandeen } 1973ac27a0ecSDave Kleikamp 1974ac27a0ecSDave Kleikamp /* 1975cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 19760fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 19770fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 1978ac27a0ecSDave Kleikamp */ 1979f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 1980ac27a0ecSDave Kleikamp { 1981617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 19820fc1b451SAneesh Kumar K.V int meta_blocks; 19830fc1b451SAneesh Kumar K.V loff_t upper_limit; 19840b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 19850b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 19860b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 19870b8e58a1SAndreas Dilger * 19880b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 19890b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 19900fc1b451SAneesh Kumar K.V */ 19910fc1b451SAneesh Kumar K.V 1992f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 19930fc1b451SAneesh Kumar K.V /* 199490c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 19950b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 19960b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 19970fc1b451SAneesh Kumar K.V */ 19980fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 19990fc1b451SAneesh Kumar K.V 20000fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 20010fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 20020fc1b451SAneesh Kumar K.V 20030fc1b451SAneesh Kumar K.V } else { 20048180a562SAneesh Kumar K.V /* 20058180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 20068180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 20078180a562SAneesh Kumar K.V * represent total number of blocks in 20088180a562SAneesh Kumar K.V * file system block size 20098180a562SAneesh Kumar K.V */ 20100fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 20110fc1b451SAneesh Kumar K.V 20120fc1b451SAneesh Kumar K.V } 20130fc1b451SAneesh Kumar K.V 20140fc1b451SAneesh Kumar K.V /* indirect blocks */ 20150fc1b451SAneesh Kumar K.V meta_blocks = 1; 20160fc1b451SAneesh Kumar K.V /* double indirect blocks */ 20170fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 20180fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 20190fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 20200fc1b451SAneesh Kumar K.V 20210fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 20220fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2023ac27a0ecSDave Kleikamp 2024ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2025ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2026ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2027ac27a0ecSDave Kleikamp res <<= bits; 2028ac27a0ecSDave Kleikamp if (res > upper_limit) 2029ac27a0ecSDave Kleikamp res = upper_limit; 20300fc1b451SAneesh Kumar K.V 20310fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 20320fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 20330fc1b451SAneesh Kumar K.V 2034ac27a0ecSDave Kleikamp return res; 2035ac27a0ecSDave Kleikamp } 2036ac27a0ecSDave Kleikamp 2037617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 203870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2039ac27a0ecSDave Kleikamp { 2040617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2041fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2042ac27a0ecSDave Kleikamp int has_super = 0; 2043ac27a0ecSDave Kleikamp 2044ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2045ac27a0ecSDave Kleikamp 2046617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2047ac27a0ecSDave Kleikamp nr < first_meta_bg) 204870bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2049ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2050617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2051ac27a0ecSDave Kleikamp has_super = 1; 20520b8e58a1SAndreas Dilger 2053617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2054ac27a0ecSDave Kleikamp } 2055ac27a0ecSDave Kleikamp 2056c9de560dSAlex Tomas /** 2057c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2058c9de560dSAlex Tomas * @sbi: In memory super block info 2059c9de560dSAlex Tomas * 2060c9de560dSAlex Tomas * If we have specified it via mount option, then 2061c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2062c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2063c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2064c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2065c9de560dSAlex Tomas * 2066c9de560dSAlex Tomas */ 2067c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2068c9de560dSAlex Tomas { 2069c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2070c9de560dSAlex Tomas unsigned long stripe_width = 2071c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 2072c9de560dSAlex Tomas 2073c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 2074c9de560dSAlex Tomas return sbi->s_stripe; 2075c9de560dSAlex Tomas 2076c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 2077c9de560dSAlex Tomas return stripe_width; 2078c9de560dSAlex Tomas 2079c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 2080c9de560dSAlex Tomas return stride; 2081c9de560dSAlex Tomas 2082c9de560dSAlex Tomas return 0; 2083c9de560dSAlex Tomas } 2084ac27a0ecSDave Kleikamp 20853197ebdbSTheodore Ts'o /* sysfs supprt */ 20863197ebdbSTheodore Ts'o 20873197ebdbSTheodore Ts'o struct ext4_attr { 20883197ebdbSTheodore Ts'o struct attribute attr; 20893197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 20903197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 20913197ebdbSTheodore Ts'o const char *, size_t); 20923197ebdbSTheodore Ts'o int offset; 20933197ebdbSTheodore Ts'o }; 20943197ebdbSTheodore Ts'o 20953197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 20963197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 20973197ebdbSTheodore Ts'o { 20983197ebdbSTheodore Ts'o char *endp; 20993197ebdbSTheodore Ts'o 21003197ebdbSTheodore Ts'o while (*buf && isspace(*buf)) 21013197ebdbSTheodore Ts'o buf++; 21023197ebdbSTheodore Ts'o *value = simple_strtoul(buf, &endp, 0); 21033197ebdbSTheodore Ts'o while (*endp && isspace(*endp)) 21043197ebdbSTheodore Ts'o endp++; 21053197ebdbSTheodore Ts'o if (*endp || *value > max) 21063197ebdbSTheodore Ts'o return -EINVAL; 21073197ebdbSTheodore Ts'o 21083197ebdbSTheodore Ts'o return 0; 21093197ebdbSTheodore Ts'o } 21103197ebdbSTheodore Ts'o 21113197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 21123197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 21133197ebdbSTheodore Ts'o char *buf) 21143197ebdbSTheodore Ts'o { 21153197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 21163197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 21173197ebdbSTheodore Ts'o } 21183197ebdbSTheodore Ts'o 21193197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 21203197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 21213197ebdbSTheodore Ts'o { 21223197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 21233197ebdbSTheodore Ts'o 21243197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 21253197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 21263197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 21273197ebdbSTheodore Ts'o } 21283197ebdbSTheodore Ts'o 21293197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 21303197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 21313197ebdbSTheodore Ts'o { 21323197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 21333197ebdbSTheodore Ts'o 21343197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 21353197ebdbSTheodore Ts'o sbi->s_kbytes_written + 21363197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 21373197ebdbSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 21383197ebdbSTheodore Ts'o } 21393197ebdbSTheodore Ts'o 21403197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 21413197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 21423197ebdbSTheodore Ts'o const char *buf, size_t count) 21433197ebdbSTheodore Ts'o { 21443197ebdbSTheodore Ts'o unsigned long t; 21453197ebdbSTheodore Ts'o 21463197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 21473197ebdbSTheodore Ts'o return -EINVAL; 21483197ebdbSTheodore Ts'o 2149f7c43950STheodore Ts'o if (!is_power_of_2(t)) 21503197ebdbSTheodore Ts'o return -EINVAL; 21513197ebdbSTheodore Ts'o 21523197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 21533197ebdbSTheodore Ts'o return count; 21543197ebdbSTheodore Ts'o } 21553197ebdbSTheodore Ts'o 21563197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 21573197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 21583197ebdbSTheodore Ts'o { 21593197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 21603197ebdbSTheodore Ts'o 21613197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 21623197ebdbSTheodore Ts'o } 21633197ebdbSTheodore Ts'o 21643197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 21653197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 21663197ebdbSTheodore Ts'o const char *buf, size_t count) 21673197ebdbSTheodore Ts'o { 21683197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 21693197ebdbSTheodore Ts'o unsigned long t; 21703197ebdbSTheodore Ts'o 21713197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 21723197ebdbSTheodore Ts'o return -EINVAL; 21733197ebdbSTheodore Ts'o *ui = t; 21743197ebdbSTheodore Ts'o return count; 21753197ebdbSTheodore Ts'o } 21763197ebdbSTheodore Ts'o 21773197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 21783197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 21793197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 21803197ebdbSTheodore Ts'o .show = _show, \ 21813197ebdbSTheodore Ts'o .store = _store, \ 21823197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 21833197ebdbSTheodore Ts'o } 21843197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 21853197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 21863197ebdbSTheodore Ts'o 21873197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 21883197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 21893197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 21903197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 21913197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 21923197ebdbSTheodore Ts'o 21933197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 21943197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 21953197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 21963197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 21973197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 219811013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 21993197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 22003197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 22013197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 22023197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 22033197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 22043197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 220555138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 22063197ebdbSTheodore Ts'o 22073197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 22083197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 22093197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 22103197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 22113197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 221211013911SAndreas Dilger ATTR_LIST(inode_goal), 22133197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 22143197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 22153197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 22163197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 22173197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 22183197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 221955138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 22203197ebdbSTheodore Ts'o NULL, 22213197ebdbSTheodore Ts'o }; 22223197ebdbSTheodore Ts'o 22233197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 22243197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 22253197ebdbSTheodore Ts'o { 22263197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 22273197ebdbSTheodore Ts'o s_kobj); 22283197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 22293197ebdbSTheodore Ts'o 22303197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 22313197ebdbSTheodore Ts'o } 22323197ebdbSTheodore Ts'o 22333197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 22343197ebdbSTheodore Ts'o struct attribute *attr, 22353197ebdbSTheodore Ts'o const char *buf, size_t len) 22363197ebdbSTheodore Ts'o { 22373197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 22383197ebdbSTheodore Ts'o s_kobj); 22393197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 22403197ebdbSTheodore Ts'o 22413197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 22423197ebdbSTheodore Ts'o } 22433197ebdbSTheodore Ts'o 22443197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 22453197ebdbSTheodore Ts'o { 22463197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 22473197ebdbSTheodore Ts'o s_kobj); 22483197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 22493197ebdbSTheodore Ts'o } 22503197ebdbSTheodore Ts'o 22513197ebdbSTheodore Ts'o 22523197ebdbSTheodore Ts'o static struct sysfs_ops ext4_attr_ops = { 22533197ebdbSTheodore Ts'o .show = ext4_attr_show, 22543197ebdbSTheodore Ts'o .store = ext4_attr_store, 22553197ebdbSTheodore Ts'o }; 22563197ebdbSTheodore Ts'o 22573197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 22583197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 22593197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 22603197ebdbSTheodore Ts'o .release = ext4_sb_release, 22613197ebdbSTheodore Ts'o }; 22623197ebdbSTheodore Ts'o 2263a13fb1a4SEric Sandeen /* 2264a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2265a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2266a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2267a13fb1a4SEric Sandeen * 0 if it cannot be. 2268a13fb1a4SEric Sandeen */ 2269a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2270a13fb1a4SEric Sandeen { 2271a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2272a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2273a13fb1a4SEric Sandeen "Couldn't mount because of " 2274a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2275a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2276a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2277a13fb1a4SEric Sandeen return 0; 2278a13fb1a4SEric Sandeen } 2279a13fb1a4SEric Sandeen 2280a13fb1a4SEric Sandeen if (readonly) 2281a13fb1a4SEric Sandeen return 1; 2282a13fb1a4SEric Sandeen 2283a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2284a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2285a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2286a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2287a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2288a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2289a13fb1a4SEric Sandeen return 0; 2290a13fb1a4SEric Sandeen } 2291a13fb1a4SEric Sandeen /* 2292a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2293a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2294a13fb1a4SEric Sandeen */ 2295a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2296a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2297a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2298a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2299a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2300a13fb1a4SEric Sandeen return 0; 2301a13fb1a4SEric Sandeen } 2302a13fb1a4SEric Sandeen } 2303a13fb1a4SEric Sandeen return 1; 2304a13fb1a4SEric Sandeen } 2305a13fb1a4SEric Sandeen 2306617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 23077477827fSAneesh Kumar K.V __releases(kernel_lock) 23087477827fSAneesh Kumar K.V __acquires(kernel_lock) 2309ac27a0ecSDave Kleikamp { 2310ac27a0ecSDave Kleikamp struct buffer_head *bh; 2311617ba13bSMingming Cao struct ext4_super_block *es = NULL; 2312617ba13bSMingming Cao struct ext4_sb_info *sbi; 2313617ba13bSMingming Cao ext4_fsblk_t block; 2314617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 231570bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 2316ac27a0ecSDave Kleikamp unsigned long offset = 0; 2317ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 2318ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 2319ac27a0ecSDave Kleikamp struct inode *root; 23209f6200bbSTheodore Ts'o char *cp; 23210390131bSFrank Mayhar const char *descr; 23221d1fe1eeSDavid Howells int ret = -EINVAL; 2323ac27a0ecSDave Kleikamp int blocksize; 23244ec11028STheodore Ts'o unsigned int db_count; 23254ec11028STheodore Ts'o unsigned int i; 2326f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 2327bd81d8eeSLaurent Vivier __u64 blocks_count; 2328833f4077SPeter Zijlstra int err; 2329b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 2330ac27a0ecSDave Kleikamp 2331ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 2332ac27a0ecSDave Kleikamp if (!sbi) 2333ac27a0ecSDave Kleikamp return -ENOMEM; 2334705895b6SPekka Enberg 2335705895b6SPekka Enberg sbi->s_blockgroup_lock = 2336705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 2337705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 2338705895b6SPekka Enberg kfree(sbi); 2339705895b6SPekka Enberg return -ENOMEM; 2340705895b6SPekka Enberg } 2341ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 2342ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 2343617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 2344617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 2345240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 2346d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 2347afc32f7eSTheodore Ts'o sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, 2348afc32f7eSTheodore Ts'o sectors[1]); 2349ac27a0ecSDave Kleikamp 2350ac27a0ecSDave Kleikamp unlock_kernel(); 2351ac27a0ecSDave Kleikamp 23529f6200bbSTheodore Ts'o /* Cleanup superblock name */ 23539f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 23549f6200bbSTheodore Ts'o *cp = '!'; 23559f6200bbSTheodore Ts'o 2356617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 2357ac27a0ecSDave Kleikamp if (!blocksize) { 2358b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 2359ac27a0ecSDave Kleikamp goto out_fail; 2360ac27a0ecSDave Kleikamp } 2361ac27a0ecSDave Kleikamp 2362ac27a0ecSDave Kleikamp /* 2363617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 2364ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 2365ac27a0ecSDave Kleikamp */ 2366617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 236770bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 236870bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 2369ac27a0ecSDave Kleikamp } else { 237070bbb3e0SAndrew Morton logical_sb_block = sb_block; 2371ac27a0ecSDave Kleikamp } 2372ac27a0ecSDave Kleikamp 237370bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 2374b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 2375ac27a0ecSDave Kleikamp goto out_fail; 2376ac27a0ecSDave Kleikamp } 2377ac27a0ecSDave Kleikamp /* 2378ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 2379617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 2380ac27a0ecSDave Kleikamp */ 2381617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2382ac27a0ecSDave Kleikamp sbi->s_es = es; 2383ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 2384617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 2385617ba13bSMingming Cao goto cantfind_ext4; 2386afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 2387ac27a0ecSDave Kleikamp 2388ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 2389ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 2390617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 2391ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 2392617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 2393ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 2394617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 2395ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 239603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 2397617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 2398ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 23992e7842b8SHugh Dickins #endif 240003010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 2401617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 2402ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 24032e7842b8SHugh Dickins #endif 2404617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 2405617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 2406617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 2407617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 2408617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 2409617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; 2410ac27a0ecSDave Kleikamp 2411617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 2412ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 2413bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 2414ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 2415bb4f397aSAneesh Kumar K.V else 2416bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 2417ac27a0ecSDave Kleikamp 2418ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 2419ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 242030773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 242130773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 242230773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 2423ac27a0ecSDave Kleikamp 2424571640caSEric Sandeen set_opt(sbi->s_mount_opt, BARRIER); 2425ac27a0ecSDave Kleikamp 24261e2462f9SMingming Cao /* 2427dd919b98SAneesh Kumar K.V * enable delayed allocation by default 2428dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 2429dd919b98SAneesh Kumar K.V */ 2430dd919b98SAneesh Kumar K.V set_opt(sbi->s_mount_opt, DELALLOC); 2431dd919b98SAneesh Kumar K.V 2432b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 2433b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 2434ac27a0ecSDave Kleikamp goto failed_mount; 2435ac27a0ecSDave Kleikamp 2436ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2437617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 2438ac27a0ecSDave Kleikamp 2439617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 2440617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 2441617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 2442617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 2443b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2444b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 2445b31e1552SEric Sandeen "running e2fsck is recommended"); 2446469108ffSTheodore Tso 2447469108ffSTheodore Tso /* 2448ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 2449ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 2450ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 2451ac27a0ecSDave Kleikamp */ 2452a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 2453ac27a0ecSDave Kleikamp goto failed_mount; 2454a13fb1a4SEric Sandeen 2455ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 2456ac27a0ecSDave Kleikamp 2457617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 2458617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 2459b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2460b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 2461ac27a0ecSDave Kleikamp goto failed_mount; 2462ac27a0ecSDave Kleikamp } 2463ac27a0ecSDave Kleikamp 2464ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 2465ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 2466ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 2467b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 2468ce40733cSAneesh Kumar K.V blocksize); 2469ac27a0ecSDave Kleikamp goto failed_mount; 2470ac27a0ecSDave Kleikamp } 2471ac27a0ecSDave Kleikamp 2472ac27a0ecSDave Kleikamp brelse(bh); 247370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 247470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 247570bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 2476ac27a0ecSDave Kleikamp if (!bh) { 2477b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2478b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 2479ac27a0ecSDave Kleikamp goto failed_mount; 2480ac27a0ecSDave Kleikamp } 2481617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 2482ac27a0ecSDave Kleikamp sbi->s_es = es; 2483617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 2484b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2485b31e1552SEric Sandeen "Magic mismatch, very weird!"); 2486ac27a0ecSDave Kleikamp goto failed_mount; 2487ac27a0ecSDave Kleikamp } 2488ac27a0ecSDave Kleikamp } 2489ac27a0ecSDave Kleikamp 2490a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2491a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 2492f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 2493f287a1a5STheodore Ts'o has_huge_files); 2494f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 2495ac27a0ecSDave Kleikamp 2496617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 2497617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 2498617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 2499ac27a0ecSDave Kleikamp } else { 2500ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2501ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2502617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 25031330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2504ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2505b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2506b31e1552SEric Sandeen "unsupported inode size: %d", 2507ac27a0ecSDave Kleikamp sbi->s_inode_size); 2508ac27a0ecSDave Kleikamp goto failed_mount; 2509ac27a0ecSDave Kleikamp } 2510ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2511ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2512ac27a0ecSDave Kleikamp } 25130b8e58a1SAndreas Dilger 25140d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 25150d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 25168fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 25170d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2518d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 2519b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2520b31e1552SEric Sandeen "unsupported descriptor size %lu", 25210d1ee42fSAlexandre Ratchov sbi->s_desc_size); 25220d1ee42fSAlexandre Ratchov goto failed_mount; 25230d1ee42fSAlexandre Ratchov } 25240d1ee42fSAlexandre Ratchov } else 25250d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 25260b8e58a1SAndreas Dilger 2527ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2528ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2529b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2530617ba13bSMingming Cao goto cantfind_ext4; 25310b8e58a1SAndreas Dilger 2532617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2533ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2534617ba13bSMingming Cao goto cantfind_ext4; 2535ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2536ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 25370d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2538ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2539ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2540e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2541e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 25420b8e58a1SAndreas Dilger 2543ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 2544ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2545ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2546f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 2547f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 2548f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2549f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 2550f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 2551f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 2552f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2553f99b2589STheodore Ts'o #else 2554f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 2555f99b2589STheodore Ts'o #endif 2556f99b2589STheodore Ts'o sb->s_dirt = 1; 2557f99b2589STheodore Ts'o } 2558ac27a0ecSDave Kleikamp 2559ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2560b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2561b31e1552SEric Sandeen "#blocks per group too big: %lu", 2562ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2563ac27a0ecSDave Kleikamp goto failed_mount; 2564ac27a0ecSDave Kleikamp } 2565ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2566b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2567b31e1552SEric Sandeen "#inodes per group too big: %lu", 2568ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2569ac27a0ecSDave Kleikamp goto failed_mount; 2570ac27a0ecSDave Kleikamp } 2571ac27a0ecSDave Kleikamp 2572bf43d84bSEric Sandeen /* 2573bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 2574bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 2575bf43d84bSEric Sandeen */ 2576bf43d84bSEric Sandeen if ((ext4_blocks_count(es) > 2577bf43d84bSEric Sandeen (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) || 2578bf43d84bSEric Sandeen (ext4_blocks_count(es) > 2579bf43d84bSEric Sandeen (pgoff_t)(~0ULL) >> (PAGE_CACHE_SHIFT - sb->s_blocksize_bits))) { 2580b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 2581bf43d84bSEric Sandeen " too large to mount safely on this system"); 2582ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 258390c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 2584bf43d84bSEric Sandeen ret = -EFBIG; 2585ac27a0ecSDave Kleikamp goto failed_mount; 2586ac27a0ecSDave Kleikamp } 2587ac27a0ecSDave Kleikamp 2588617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2589617ba13bSMingming Cao goto cantfind_ext4; 2590e7c95593SEric Sandeen 25910f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 25920f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 25930f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 2594b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 2595b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 25960f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 25970f2ddca6SFrom: Thiemo Nagel goto failed_mount; 25980f2ddca6SFrom: Thiemo Nagel } 25990f2ddca6SFrom: Thiemo Nagel 26004ec11028STheodore Ts'o /* 26014ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 26024ec11028STheodore Ts'o * of the filesystem. 26034ec11028STheodore Ts'o */ 26044ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 2605b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 2606b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 2607e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 26084ec11028STheodore Ts'o ext4_blocks_count(es)); 2609e7c95593SEric Sandeen goto failed_mount; 2610e7c95593SEric Sandeen } 2611bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2612bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2613bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2614bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 26154ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 2616b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 26174ec11028STheodore Ts'o "(block count %llu, first data block %u, " 2618b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 26194ec11028STheodore Ts'o ext4_blocks_count(es), 26204ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 26214ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 26224ec11028STheodore Ts'o goto failed_mount; 26234ec11028STheodore Ts'o } 2624bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2625fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 2626fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 2627617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2628617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2629ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 2630ac27a0ecSDave Kleikamp GFP_KERNEL); 2631ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2632b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 2633ac27a0ecSDave Kleikamp goto failed_mount; 2634ac27a0ecSDave Kleikamp } 2635ac27a0ecSDave Kleikamp 26363244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 26379f6200bbSTheodore Ts'o if (ext4_proc_root) 26389f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 26393244fcb1SAlexander Beregalov #endif 2640240799cdSTheodore Ts'o 2641705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 2642ac27a0ecSDave Kleikamp 2643ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 264470bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2645ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2646ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2647b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2648b31e1552SEric Sandeen "can't read group descriptor %d", i); 2649ac27a0ecSDave Kleikamp db_count = i; 2650ac27a0ecSDave Kleikamp goto failed_mount2; 2651ac27a0ecSDave Kleikamp } 2652ac27a0ecSDave Kleikamp } 2653617ba13bSMingming Cao if (!ext4_check_descriptors(sb)) { 2654b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 2655ac27a0ecSDave Kleikamp goto failed_mount2; 2656ac27a0ecSDave Kleikamp } 2657772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2658772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 2659b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2660b31e1552SEric Sandeen "unable to initialize " 2661b31e1552SEric Sandeen "flex_bg meta info!"); 2662772cb7c8SJose R. Santos goto failed_mount2; 2663772cb7c8SJose R. Santos } 2664772cb7c8SJose R. Santos 2665ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2666ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2667ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2668ac27a0ecSDave Kleikamp 2669833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeblocks_counter, 2670617ba13bSMingming Cao ext4_count_free_blocks(sb)); 2671833f4077SPeter Zijlstra if (!err) { 2672833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeinodes_counter, 2673617ba13bSMingming Cao ext4_count_free_inodes(sb)); 2674833f4077SPeter Zijlstra } 2675833f4077SPeter Zijlstra if (!err) { 2676833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_dirs_counter, 2677617ba13bSMingming Cao ext4_count_dirs(sb)); 2678833f4077SPeter Zijlstra } 26796bc6e63fSAneesh Kumar K.V if (!err) { 26806bc6e63fSAneesh Kumar K.V err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 26816bc6e63fSAneesh Kumar K.V } 2682833f4077SPeter Zijlstra if (err) { 2683b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "insufficient memory"); 2684833f4077SPeter Zijlstra goto failed_mount3; 2685833f4077SPeter Zijlstra } 2686ac27a0ecSDave Kleikamp 2687c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 268855138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 2689c9de560dSAlex Tomas 2690ac27a0ecSDave Kleikamp /* 2691ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2692ac27a0ecSDave Kleikamp */ 26939ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 26949ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 2695617ba13bSMingming Cao sb->s_op = &ext4_sops; 26969ca92389STheodore Ts'o else 26979ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 2698617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2699617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2700ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2701617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2702617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2703ac27a0ecSDave Kleikamp #endif 2704ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 27053b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 270632ed5058STheodore Ts'o mutex_init(&sbi->s_resize_lock); 2707ac27a0ecSDave Kleikamp 2708ac27a0ecSDave Kleikamp sb->s_root = NULL; 2709ac27a0ecSDave Kleikamp 2710ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2711617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2712617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2713ac27a0ecSDave Kleikamp 2714ac27a0ecSDave Kleikamp /* 2715ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2716ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2717ac27a0ecSDave Kleikamp */ 2718ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2719617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2720617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2721ac27a0ecSDave Kleikamp goto failed_mount3; 2722624080edSTheodore Ts'o if (!(sb->s_flags & MS_RDONLY) && 2723624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit) { 2724b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "error: " 2725624080edSTheodore Ts'o "ext4_fill_super: Journal transaction " 2726b31e1552SEric Sandeen "%u is corrupt", 2727624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit); 2728624080edSTheodore Ts'o if (test_opt(sb, ERRORS_RO)) { 2729b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, 2730b31e1552SEric Sandeen "Mounting filesystem read-only"); 2731624080edSTheodore Ts'o sb->s_flags |= MS_RDONLY; 2732624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2733624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2734624080edSTheodore Ts'o } 2735624080edSTheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) { 2736624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2737624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2738e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 2739624080edSTheodore Ts'o goto failed_mount4; 2740624080edSTheodore Ts'o } 2741624080edSTheodore Ts'o } 27420390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 27430390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2744b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 2745b31e1552SEric Sandeen "suppressed and not mounted read-only"); 27460390131bSFrank Mayhar goto failed_mount4; 2747ac27a0ecSDave Kleikamp } else { 27480390131bSFrank Mayhar clear_opt(sbi->s_mount_opt, DATA_FLAGS); 27490390131bSFrank Mayhar set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 27500390131bSFrank Mayhar sbi->s_journal = NULL; 27510390131bSFrank Mayhar needs_recovery = 0; 27520390131bSFrank Mayhar goto no_journal; 2753ac27a0ecSDave Kleikamp } 2754ac27a0ecSDave Kleikamp 2755eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2756eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2757eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2758b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 2759eb40a09cSJose R. Santos goto failed_mount4; 2760eb40a09cSJose R. Santos } 2761eb40a09cSJose R. Santos 2762818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2763818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2764d0646f7bSTheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 2765d0646f7bSTheodore Ts'o jbd2_journal_set_features(sbi->s_journal, 0, 0, 2766d0646f7bSTheodore Ts'o JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2767d0646f7bSTheodore Ts'o else 2768818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2769818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2770818d276cSGirish Shilamkar 2771ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2772ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2773ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 2774ac27a0ecSDave Kleikamp case 0: 2775ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 277663f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 277763f57933SAndrew Morton * cope, else JOURNAL_DATA 277863f57933SAndrew Morton */ 2779dab291afSMingming Cao if (jbd2_journal_check_available_features 2780dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 2781ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 2782ac27a0ecSDave Kleikamp else 2783ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2784ac27a0ecSDave Kleikamp break; 2785ac27a0ecSDave Kleikamp 2786617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 2787617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 2788dab291afSMingming Cao if (!jbd2_journal_check_available_features 2789dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 2790b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 2791b31e1552SEric Sandeen "requested data journaling mode"); 2792ac27a0ecSDave Kleikamp goto failed_mount4; 2793ac27a0ecSDave Kleikamp } 2794ac27a0ecSDave Kleikamp default: 2795ac27a0ecSDave Kleikamp break; 2796ac27a0ecSDave Kleikamp } 2797b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 2798ac27a0ecSDave Kleikamp 27990390131bSFrank Mayhar no_journal: 2800ac27a0ecSDave Kleikamp 2801ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 2802617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 2803b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring nobh option - " 2804b31e1552SEric Sandeen "its supported only with writeback mode"); 2805ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 2806ac27a0ecSDave Kleikamp } 2807ac27a0ecSDave Kleikamp } 28084c0425ffSMingming Cao EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); 28094c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 28104c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 28114c0425ffSMingming Cao goto failed_mount_wq; 28124c0425ffSMingming Cao } 28134c0425ffSMingming Cao 2814ac27a0ecSDave Kleikamp /* 2815dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 2816ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 2817ac27a0ecSDave Kleikamp */ 2818ac27a0ecSDave Kleikamp 28191d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 28201d1fe1eeSDavid Howells if (IS_ERR(root)) { 2821b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 28221d1fe1eeSDavid Howells ret = PTR_ERR(root); 2823ac27a0ecSDave Kleikamp goto failed_mount4; 2824ac27a0ecSDave Kleikamp } 2825ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 28261d1fe1eeSDavid Howells iput(root); 2827b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 2828ac27a0ecSDave Kleikamp goto failed_mount4; 2829ac27a0ecSDave Kleikamp } 28301d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 28311d1fe1eeSDavid Howells if (!sb->s_root) { 2832b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 28331d1fe1eeSDavid Howells iput(root); 28341d1fe1eeSDavid Howells ret = -ENOMEM; 28351d1fe1eeSDavid Howells goto failed_mount4; 28361d1fe1eeSDavid Howells } 2837ac27a0ecSDave Kleikamp 2838617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 2839ef7f3835SKalpak Shah 2840ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 2841ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 2842ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2843ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2844ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 2845ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 2846ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2847ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 2848ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2849ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 2850ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2851ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 2852ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2853ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 2854ef7f3835SKalpak Shah } 2855ef7f3835SKalpak Shah } 2856ef7f3835SKalpak Shah /* Check if enough inode space is available */ 2857ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 2858ef7f3835SKalpak Shah sbi->s_inode_size) { 2859ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2860ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2861b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 2862b31e1552SEric Sandeen "available"); 2863ef7f3835SKalpak Shah } 2864ef7f3835SKalpak Shah 286590576c0bSTheodore Ts'o if (test_opt(sb, DELALLOC) && 286690576c0bSTheodore Ts'o (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 2867b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " 2868b31e1552SEric Sandeen "requested data journaling mode"); 2869c2774d84SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 287090576c0bSTheodore Ts'o } 2871c2774d84SAneesh Kumar K.V 28726fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 28736fd058f7STheodore Ts'o if (err) { 2874b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 28756fd058f7STheodore Ts'o "zone (%d)\n", err); 28766fd058f7STheodore Ts'o goto failed_mount4; 28776fd058f7STheodore Ts'o } 28786fd058f7STheodore Ts'o 2879c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 2880c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 2881c2774d84SAneesh Kumar K.V if (err) { 2882b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initalize mballoc (%d)", 2883c2774d84SAneesh Kumar K.V err); 2884c2774d84SAneesh Kumar K.V goto failed_mount4; 2885c2774d84SAneesh Kumar K.V } 2886c2774d84SAneesh Kumar K.V 28873197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 28883197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 28893197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 28903197ebdbSTheodore Ts'o "%s", sb->s_id); 28913197ebdbSTheodore Ts'o if (err) { 28923197ebdbSTheodore Ts'o ext4_mb_release(sb); 28933197ebdbSTheodore Ts'o ext4_ext_release(sb); 28943197ebdbSTheodore Ts'o goto failed_mount4; 28953197ebdbSTheodore Ts'o }; 28963197ebdbSTheodore Ts'o 2897617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 2898617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 2899617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 29000390131bSFrank Mayhar if (needs_recovery) { 2901b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 2902617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 29030390131bSFrank Mayhar } 29040390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 29050390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 29060390131bSFrank Mayhar descr = " journalled data mode"; 29070390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 29080390131bSFrank Mayhar descr = " ordered data mode"; 29090390131bSFrank Mayhar else 29100390131bSFrank Mayhar descr = " writeback data mode"; 29110390131bSFrank Mayhar } else 29120390131bSFrank Mayhar descr = "out journal"; 29130390131bSFrank Mayhar 2914b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "mounted filesystem with%s", descr); 2915ac27a0ecSDave Kleikamp 2916ac27a0ecSDave Kleikamp lock_kernel(); 2917ac27a0ecSDave Kleikamp return 0; 2918ac27a0ecSDave Kleikamp 2919617ba13bSMingming Cao cantfind_ext4: 2920ac27a0ecSDave Kleikamp if (!silent) 2921b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 2922ac27a0ecSDave Kleikamp goto failed_mount; 2923ac27a0ecSDave Kleikamp 2924ac27a0ecSDave Kleikamp failed_mount4: 2925b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 29264c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 29274c0425ffSMingming Cao failed_mount_wq: 29286fd058f7STheodore Ts'o ext4_release_system_zone(sb); 29290390131bSFrank Mayhar if (sbi->s_journal) { 2930dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 293147b4a50bSJan Kara sbi->s_journal = NULL; 29320390131bSFrank Mayhar } 2933ac27a0ecSDave Kleikamp failed_mount3: 2934c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) { 2935c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 2936c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 2937c5ca7c76STheodore Ts'o else 2938c5ca7c76STheodore Ts'o kfree(sbi->s_flex_groups); 2939c5ca7c76STheodore Ts'o } 2940ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 2941ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 2942ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 29436bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 2944ac27a0ecSDave Kleikamp failed_mount2: 2945ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 2946ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 2947ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 2948ac27a0ecSDave Kleikamp failed_mount: 2949240799cdSTheodore Ts'o if (sbi->s_proc) { 29509f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 2951240799cdSTheodore Ts'o } 2952ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2953ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2954ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 2955ac27a0ecSDave Kleikamp #endif 2956617ba13bSMingming Cao ext4_blkdev_remove(sbi); 2957ac27a0ecSDave Kleikamp brelse(bh); 2958ac27a0ecSDave Kleikamp out_fail: 2959ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 2960f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 2961ac27a0ecSDave Kleikamp kfree(sbi); 2962ac27a0ecSDave Kleikamp lock_kernel(); 29631d1fe1eeSDavid Howells return ret; 2964ac27a0ecSDave Kleikamp } 2965ac27a0ecSDave Kleikamp 2966ac27a0ecSDave Kleikamp /* 2967ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 2968ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 2969ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 2970ac27a0ecSDave Kleikamp */ 2971617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 2972ac27a0ecSDave Kleikamp { 2973617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2974ac27a0ecSDave Kleikamp 2975ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 297630773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 297730773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 2978ac27a0ecSDave Kleikamp 2979ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 2980ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 2981dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 2982ac27a0ecSDave Kleikamp else 2983dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 29845bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 29855bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 29865bf5683aSHidehiro Kawai else 29875bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 2988ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 2989ac27a0ecSDave Kleikamp } 2990ac27a0ecSDave Kleikamp 2991617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 2992ac27a0ecSDave Kleikamp unsigned int journal_inum) 2993ac27a0ecSDave Kleikamp { 2994ac27a0ecSDave Kleikamp struct inode *journal_inode; 2995ac27a0ecSDave Kleikamp journal_t *journal; 2996ac27a0ecSDave Kleikamp 29970390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 29980390131bSFrank Mayhar 2999ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3000ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3001ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3002ac27a0ecSDave Kleikamp 30031d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 30041d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3005b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3006ac27a0ecSDave Kleikamp return NULL; 3007ac27a0ecSDave Kleikamp } 3008ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3009ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3010ac27a0ecSDave Kleikamp iput(journal_inode); 3011b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3012ac27a0ecSDave Kleikamp return NULL; 3013ac27a0ecSDave Kleikamp } 3014ac27a0ecSDave Kleikamp 3015e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3016ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 30171d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3018b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3019ac27a0ecSDave Kleikamp iput(journal_inode); 3020ac27a0ecSDave Kleikamp return NULL; 3021ac27a0ecSDave Kleikamp } 3022ac27a0ecSDave Kleikamp 3023dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3024ac27a0ecSDave Kleikamp if (!journal) { 3025b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3026ac27a0ecSDave Kleikamp iput(journal_inode); 3027ac27a0ecSDave Kleikamp return NULL; 3028ac27a0ecSDave Kleikamp } 3029ac27a0ecSDave Kleikamp journal->j_private = sb; 3030617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3031ac27a0ecSDave Kleikamp return journal; 3032ac27a0ecSDave Kleikamp } 3033ac27a0ecSDave Kleikamp 3034617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3035ac27a0ecSDave Kleikamp dev_t j_dev) 3036ac27a0ecSDave Kleikamp { 3037ac27a0ecSDave Kleikamp struct buffer_head *bh; 3038ac27a0ecSDave Kleikamp journal_t *journal; 3039617ba13bSMingming Cao ext4_fsblk_t start; 3040617ba13bSMingming Cao ext4_fsblk_t len; 3041ac27a0ecSDave Kleikamp int hblock, blocksize; 3042617ba13bSMingming Cao ext4_fsblk_t sb_block; 3043ac27a0ecSDave Kleikamp unsigned long offset; 3044617ba13bSMingming Cao struct ext4_super_block *es; 3045ac27a0ecSDave Kleikamp struct block_device *bdev; 3046ac27a0ecSDave Kleikamp 30470390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 30480390131bSFrank Mayhar 3049b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3050ac27a0ecSDave Kleikamp if (bdev == NULL) 3051ac27a0ecSDave Kleikamp return NULL; 3052ac27a0ecSDave Kleikamp 3053ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 3054b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3055b31e1552SEric Sandeen "failed to claim external journal device"); 30569a1c3542SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 3057ac27a0ecSDave Kleikamp return NULL; 3058ac27a0ecSDave Kleikamp } 3059ac27a0ecSDave Kleikamp 3060ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3061e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3062ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3063b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3064b31e1552SEric Sandeen "blocksize too small for journal device"); 3065ac27a0ecSDave Kleikamp goto out_bdev; 3066ac27a0ecSDave Kleikamp } 3067ac27a0ecSDave Kleikamp 3068617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3069617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3070ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3071ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3072b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3073b31e1552SEric Sandeen "external journal"); 3074ac27a0ecSDave Kleikamp goto out_bdev; 3075ac27a0ecSDave Kleikamp } 3076ac27a0ecSDave Kleikamp 3077617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3078617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3079ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3080617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3081b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3082b31e1552SEric Sandeen "bad superblock"); 3083ac27a0ecSDave Kleikamp brelse(bh); 3084ac27a0ecSDave Kleikamp goto out_bdev; 3085ac27a0ecSDave Kleikamp } 3086ac27a0ecSDave Kleikamp 3087617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3088b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3089ac27a0ecSDave Kleikamp brelse(bh); 3090ac27a0ecSDave Kleikamp goto out_bdev; 3091ac27a0ecSDave Kleikamp } 3092ac27a0ecSDave Kleikamp 3093bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3094ac27a0ecSDave Kleikamp start = sb_block + 1; 3095ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3096ac27a0ecSDave Kleikamp 3097dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3098ac27a0ecSDave Kleikamp start, len, blocksize); 3099ac27a0ecSDave Kleikamp if (!journal) { 3100b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3101ac27a0ecSDave Kleikamp goto out_bdev; 3102ac27a0ecSDave Kleikamp } 3103ac27a0ecSDave Kleikamp journal->j_private = sb; 3104ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3105ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3106ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3107b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3108ac27a0ecSDave Kleikamp goto out_journal; 3109ac27a0ecSDave Kleikamp } 3110ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3111b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3112b31e1552SEric Sandeen "user (unsupported) - %d", 3113ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3114ac27a0ecSDave Kleikamp goto out_journal; 3115ac27a0ecSDave Kleikamp } 3116617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3117617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3118ac27a0ecSDave Kleikamp return journal; 31190b8e58a1SAndreas Dilger 3120ac27a0ecSDave Kleikamp out_journal: 3121dab291afSMingming Cao jbd2_journal_destroy(journal); 3122ac27a0ecSDave Kleikamp out_bdev: 3123617ba13bSMingming Cao ext4_blkdev_put(bdev); 3124ac27a0ecSDave Kleikamp return NULL; 3125ac27a0ecSDave Kleikamp } 3126ac27a0ecSDave Kleikamp 3127617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3128617ba13bSMingming Cao struct ext4_super_block *es, 3129ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3130ac27a0ecSDave Kleikamp { 3131ac27a0ecSDave Kleikamp journal_t *journal; 3132ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3133ac27a0ecSDave Kleikamp dev_t journal_dev; 3134ac27a0ecSDave Kleikamp int err = 0; 3135ac27a0ecSDave Kleikamp int really_read_only; 3136ac27a0ecSDave Kleikamp 31370390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 31380390131bSFrank Mayhar 3139ac27a0ecSDave Kleikamp if (journal_devnum && 3140ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3141b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3142b31e1552SEric Sandeen "numbers have changed"); 3143ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3144ac27a0ecSDave Kleikamp } else 3145ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3146ac27a0ecSDave Kleikamp 3147ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3148ac27a0ecSDave Kleikamp 3149ac27a0ecSDave Kleikamp /* 3150ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3151ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3152ac27a0ecSDave Kleikamp * can get read-write access to the device. 3153ac27a0ecSDave Kleikamp */ 3154617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3155ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3156b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3157b31e1552SEric Sandeen "required on readonly filesystem"); 3158ac27a0ecSDave Kleikamp if (really_read_only) { 3159b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3160b31e1552SEric Sandeen "unavailable, cannot proceed"); 3161ac27a0ecSDave Kleikamp return -EROFS; 3162ac27a0ecSDave Kleikamp } 3163b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 3164b31e1552SEric Sandeen "be enabled during recovery"); 3165ac27a0ecSDave Kleikamp } 3166ac27a0ecSDave Kleikamp } 3167ac27a0ecSDave Kleikamp 3168ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3169b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 3170b31e1552SEric Sandeen "and inode journals!"); 3171ac27a0ecSDave Kleikamp return -EINVAL; 3172ac27a0ecSDave Kleikamp } 3173ac27a0ecSDave Kleikamp 3174ac27a0ecSDave Kleikamp if (journal_inum) { 3175617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3176ac27a0ecSDave Kleikamp return -EINVAL; 3177ac27a0ecSDave Kleikamp } else { 3178617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3179ac27a0ecSDave Kleikamp return -EINVAL; 3180ac27a0ecSDave Kleikamp } 3181ac27a0ecSDave Kleikamp 318290576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 3183b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 31844776004fSTheodore Ts'o 3185ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 3186dab291afSMingming Cao err = jbd2_journal_update_format(journal); 3187ac27a0ecSDave Kleikamp if (err) { 3188b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 3189dab291afSMingming Cao jbd2_journal_destroy(journal); 3190ac27a0ecSDave Kleikamp return err; 3191ac27a0ecSDave Kleikamp } 3192ac27a0ecSDave Kleikamp } 3193ac27a0ecSDave Kleikamp 3194617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3195dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 3196ac27a0ecSDave Kleikamp if (!err) 3197dab291afSMingming Cao err = jbd2_journal_load(journal); 3198ac27a0ecSDave Kleikamp 3199ac27a0ecSDave Kleikamp if (err) { 3200b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 3201dab291afSMingming Cao jbd2_journal_destroy(journal); 3202ac27a0ecSDave Kleikamp return err; 3203ac27a0ecSDave Kleikamp } 3204ac27a0ecSDave Kleikamp 3205617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 3206617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3207ac27a0ecSDave Kleikamp 3208ac27a0ecSDave Kleikamp if (journal_devnum && 3209ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3210ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 3211ac27a0ecSDave Kleikamp 3212ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 3213e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3214ac27a0ecSDave Kleikamp } 3215ac27a0ecSDave Kleikamp 3216ac27a0ecSDave Kleikamp return 0; 3217ac27a0ecSDave Kleikamp } 3218ac27a0ecSDave Kleikamp 3219e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 3220ac27a0ecSDave Kleikamp { 3221e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3222617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 3223c4be0c1dSTakashi Sato int error = 0; 3224ac27a0ecSDave Kleikamp 3225ac27a0ecSDave Kleikamp if (!sbh) 3226c4be0c1dSTakashi Sato return error; 3227914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 3228914258bfSTheodore Ts'o /* 3229914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 3230914258bfSTheodore Ts'o * superblock failed. This could happen because the 3231914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 3232914258bfSTheodore Ts'o * be a transient write error and maybe the block will 3233914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 3234914258bfSTheodore Ts'o * write and hope for the best. 3235914258bfSTheodore Ts'o */ 3236b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 3237b31e1552SEric Sandeen "superblock detected"); 3238914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3239914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3240914258bfSTheodore Ts'o } 324171290b36STheodore Ts'o /* 324271290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 324371290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 324471290b36STheodore Ts'o * write time when we are mounting the root file system 324571290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 324671290b36STheodore Ts'o * for people who are east of GMT and who make their clock 324771290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 324871290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 324971290b36STheodore Ts'o * to complain and force a full file system check. 325071290b36STheodore Ts'o */ 325171290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 3252ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 3253afc32f7eSTheodore Ts'o es->s_kbytes_written = 3254afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 3255afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 3256afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 32575d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 32585d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 32595d1b1b3fSAneesh Kumar K.V es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( 32605d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 32617234ab2aSTheodore Ts'o sb->s_dirt = 0; 3262ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 3263ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 3264914258bfSTheodore Ts'o if (sync) { 3265c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 3266c4be0c1dSTakashi Sato if (error) 3267c4be0c1dSTakashi Sato return error; 3268c4be0c1dSTakashi Sato 3269c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 3270c4be0c1dSTakashi Sato if (error) { 3271b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 3272b31e1552SEric Sandeen "superblock"); 3273914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3274914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3275914258bfSTheodore Ts'o } 3276914258bfSTheodore Ts'o } 3277c4be0c1dSTakashi Sato return error; 3278ac27a0ecSDave Kleikamp } 3279ac27a0ecSDave Kleikamp 3280ac27a0ecSDave Kleikamp /* 3281ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 3282ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 3283ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 3284ac27a0ecSDave Kleikamp */ 3285617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 3286617ba13bSMingming Cao struct ext4_super_block *es) 3287ac27a0ecSDave Kleikamp { 3288617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 3289ac27a0ecSDave Kleikamp 32900390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 32910390131bSFrank Mayhar BUG_ON(journal != NULL); 32920390131bSFrank Mayhar return; 32930390131bSFrank Mayhar } 3294dab291afSMingming Cao jbd2_journal_lock_updates(journal); 32957ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 32967ffe1ea8SHidehiro Kawai goto out; 32977ffe1ea8SHidehiro Kawai 3298617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 3299ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 3300617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3301e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3302ac27a0ecSDave Kleikamp } 33037ffe1ea8SHidehiro Kawai 33047ffe1ea8SHidehiro Kawai out: 3305dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 3306ac27a0ecSDave Kleikamp } 3307ac27a0ecSDave Kleikamp 3308ac27a0ecSDave Kleikamp /* 3309ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 3310ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 3311ac27a0ecSDave Kleikamp * main filesystem now. 3312ac27a0ecSDave Kleikamp */ 3313617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 3314617ba13bSMingming Cao struct ext4_super_block *es) 3315ac27a0ecSDave Kleikamp { 3316ac27a0ecSDave Kleikamp journal_t *journal; 3317ac27a0ecSDave Kleikamp int j_errno; 3318ac27a0ecSDave Kleikamp const char *errstr; 3319ac27a0ecSDave Kleikamp 33200390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 33210390131bSFrank Mayhar 3322617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 3323ac27a0ecSDave Kleikamp 3324ac27a0ecSDave Kleikamp /* 3325ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 3326617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 3327ac27a0ecSDave Kleikamp */ 3328ac27a0ecSDave Kleikamp 3329dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 3330ac27a0ecSDave Kleikamp if (j_errno) { 3331ac27a0ecSDave Kleikamp char nbuf[16]; 3332ac27a0ecSDave Kleikamp 3333617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 333446e665e9SHarvey Harrison ext4_warning(sb, __func__, "Filesystem error recorded " 3335ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 333646e665e9SHarvey Harrison ext4_warning(sb, __func__, "Marking fs in need of " 3337ac27a0ecSDave Kleikamp "filesystem check."); 3338ac27a0ecSDave Kleikamp 3339617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3340617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3341e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3342ac27a0ecSDave Kleikamp 3343dab291afSMingming Cao jbd2_journal_clear_err(journal); 3344ac27a0ecSDave Kleikamp } 3345ac27a0ecSDave Kleikamp } 3346ac27a0ecSDave Kleikamp 3347ac27a0ecSDave Kleikamp /* 3348ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 3349ac27a0ecSDave Kleikamp * and wait on the commit. 3350ac27a0ecSDave Kleikamp */ 3351617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 3352ac27a0ecSDave Kleikamp { 3353ac27a0ecSDave Kleikamp journal_t *journal; 33540390131bSFrank Mayhar int ret = 0; 3355ac27a0ecSDave Kleikamp 3356ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 3357ac27a0ecSDave Kleikamp return 0; 3358ac27a0ecSDave Kleikamp 3359617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 33607234ab2aSTheodore Ts'o if (journal) 3361617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 33620390131bSFrank Mayhar 3363ac27a0ecSDave Kleikamp return ret; 3364ac27a0ecSDave Kleikamp } 3365ac27a0ecSDave Kleikamp 3366617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 3367ac27a0ecSDave Kleikamp { 3368ebc1ac16SChristoph Hellwig lock_super(sb); 3369e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3370ebc1ac16SChristoph Hellwig unlock_super(sb); 33710390131bSFrank Mayhar } 3372ac27a0ecSDave Kleikamp 3373617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 3374ac27a0ecSDave Kleikamp { 337514ce0cb4STheodore Ts'o int ret = 0; 33769eddacf9SJan Kara tid_t target; 33778d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3378ac27a0ecSDave Kleikamp 33799bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 33808d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 33818d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 3382ac27a0ecSDave Kleikamp if (wait) 33838d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 33840390131bSFrank Mayhar } 338514ce0cb4STheodore Ts'o return ret; 3386ac27a0ecSDave Kleikamp } 3387ac27a0ecSDave Kleikamp 3388ac27a0ecSDave Kleikamp /* 3389ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 3390ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 3391ac27a0ecSDave Kleikamp */ 3392c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 3393ac27a0ecSDave Kleikamp { 3394c4be0c1dSTakashi Sato int error = 0; 3395c4be0c1dSTakashi Sato journal_t *journal; 3396ac27a0ecSDave Kleikamp 33979ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 33989ca92389STheodore Ts'o return 0; 33999ca92389STheodore Ts'o 3400c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 3401ac27a0ecSDave Kleikamp 3402ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 3403dab291afSMingming Cao jbd2_journal_lock_updates(journal); 34047ffe1ea8SHidehiro Kawai 34057ffe1ea8SHidehiro Kawai /* 34069ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 34079ca92389STheodore Ts'o * the journal. 34087ffe1ea8SHidehiro Kawai */ 3409c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 34109ca92389STheodore Ts'o if (error < 0) { 34119ca92389STheodore Ts'o out: 34129ca92389STheodore Ts'o jbd2_journal_unlock_updates(journal); 34139ca92389STheodore Ts'o return error; 34140390131bSFrank Mayhar } 3415ac27a0ecSDave Kleikamp 3416ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 3417617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3418e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 3419c4be0c1dSTakashi Sato if (error) 3420c4be0c1dSTakashi Sato goto out; 3421c4be0c1dSTakashi Sato return 0; 3422ac27a0ecSDave Kleikamp } 3423ac27a0ecSDave Kleikamp 3424ac27a0ecSDave Kleikamp /* 3425ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 3426ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 3427ac27a0ecSDave Kleikamp */ 3428c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 3429ac27a0ecSDave Kleikamp { 34309ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 34319ca92389STheodore Ts'o return 0; 34329ca92389STheodore Ts'o 3433ac27a0ecSDave Kleikamp lock_super(sb); 34349ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 3435617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3436e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3437ac27a0ecSDave Kleikamp unlock_super(sb); 3438dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 3439c4be0c1dSTakashi Sato return 0; 3440ac27a0ecSDave Kleikamp } 3441ac27a0ecSDave Kleikamp 3442617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 3443ac27a0ecSDave Kleikamp { 3444617ba13bSMingming Cao struct ext4_super_block *es; 3445617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3446617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 3447ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 3448617ba13bSMingming Cao struct ext4_mount_options old_opts; 34498a266467STheodore Ts'o ext4_group_t g; 3450b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3451ac27a0ecSDave Kleikamp int err; 3452ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3453ac27a0ecSDave Kleikamp int i; 3454ac27a0ecSDave Kleikamp #endif 3455ac27a0ecSDave Kleikamp 3456337eb00aSAlessio Igor Bogani lock_kernel(); 3457337eb00aSAlessio Igor Bogani 3458ac27a0ecSDave Kleikamp /* Store the original options */ 3459bbd6851aSAl Viro lock_super(sb); 3460ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 3461ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 3462ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 3463ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 3464ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 346530773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 346630773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 3467ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3468ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 3469ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3470ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 3471ac27a0ecSDave Kleikamp #endif 3472b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 3473b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 3474ac27a0ecSDave Kleikamp 3475ac27a0ecSDave Kleikamp /* 3476ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 3477ac27a0ecSDave Kleikamp */ 3478b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 3479b3881f74STheodore Ts'o &n_blocks_count, 1)) { 3480ac27a0ecSDave Kleikamp err = -EINVAL; 3481ac27a0ecSDave Kleikamp goto restore_opts; 3482ac27a0ecSDave Kleikamp } 3483ac27a0ecSDave Kleikamp 34844ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 348546e665e9SHarvey Harrison ext4_abort(sb, __func__, "Abort forced by user"); 3486ac27a0ecSDave Kleikamp 3487ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3488617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 3489ac27a0ecSDave Kleikamp 3490ac27a0ecSDave Kleikamp es = sbi->s_es; 3491ac27a0ecSDave Kleikamp 3492b3881f74STheodore Ts'o if (sbi->s_journal) { 3493617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 3494b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3495b3881f74STheodore Ts'o } 3496ac27a0ecSDave Kleikamp 3497ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 3498bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 34994ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 3500ac27a0ecSDave Kleikamp err = -EROFS; 3501ac27a0ecSDave Kleikamp goto restore_opts; 3502ac27a0ecSDave Kleikamp } 3503ac27a0ecSDave Kleikamp 3504ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 3505ac27a0ecSDave Kleikamp /* 3506ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 3507ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 3508ac27a0ecSDave Kleikamp */ 3509ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 3510ac27a0ecSDave Kleikamp 3511ac27a0ecSDave Kleikamp /* 3512ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 3513ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 3514ac27a0ecSDave Kleikamp * mark the partition as valid again. 3515ac27a0ecSDave Kleikamp */ 3516617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 3517617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 3518ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 3519ac27a0ecSDave Kleikamp 3520a63c9eb2STheodore Ts'o if (sbi->s_journal) 3521617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 3522ac27a0ecSDave Kleikamp } else { 3523a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 3524a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 3525ac27a0ecSDave Kleikamp err = -EROFS; 3526ac27a0ecSDave Kleikamp goto restore_opts; 3527ac27a0ecSDave Kleikamp } 3528ead6596bSEric Sandeen /* 35298a266467STheodore Ts'o * Make sure the group descriptor checksums 35300b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 35318a266467STheodore Ts'o */ 35328a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 35338a266467STheodore Ts'o struct ext4_group_desc *gdp = 35348a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 35358a266467STheodore Ts'o 35368a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 3537b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3538b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 35398a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 35408a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 35418a266467STheodore Ts'o err = -EINVAL; 35428a266467STheodore Ts'o goto restore_opts; 35438a266467STheodore Ts'o } 35448a266467STheodore Ts'o } 35458a266467STheodore Ts'o 35468a266467STheodore Ts'o /* 3547ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 3548ead6596bSEric Sandeen * around from a previously readonly bdev mount, 3549ead6596bSEric Sandeen * require a full umount/remount for now. 3550ead6596bSEric Sandeen */ 3551ead6596bSEric Sandeen if (es->s_last_orphan) { 3552b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 3553ead6596bSEric Sandeen "remount RDWR because of unprocessed " 3554ead6596bSEric Sandeen "orphan inode list. Please " 3555b31e1552SEric Sandeen "umount/remount instead"); 3556ead6596bSEric Sandeen err = -EINVAL; 3557ead6596bSEric Sandeen goto restore_opts; 3558ead6596bSEric Sandeen } 3559ead6596bSEric Sandeen 3560ac27a0ecSDave Kleikamp /* 3561ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 3562ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 3563ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 3564ac27a0ecSDave Kleikamp * the partition.) 3565ac27a0ecSDave Kleikamp */ 35660390131bSFrank Mayhar if (sbi->s_journal) 3567617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3568ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3569617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 3570ac27a0ecSDave Kleikamp goto restore_opts; 3571617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 3572ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 3573ac27a0ecSDave Kleikamp } 3574ac27a0ecSDave Kleikamp } 35756fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 35760390131bSFrank Mayhar if (sbi->s_journal == NULL) 3577e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 35780390131bSFrank Mayhar 3579ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3580ac27a0ecSDave Kleikamp /* Release old quota file names */ 3581ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3582ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 3583ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3584ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 3585ac27a0ecSDave Kleikamp #endif 3586bbd6851aSAl Viro unlock_super(sb); 3587337eb00aSAlessio Igor Bogani unlock_kernel(); 3588ac27a0ecSDave Kleikamp return 0; 35890b8e58a1SAndreas Dilger 3590ac27a0ecSDave Kleikamp restore_opts: 3591ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 3592ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 3593ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 3594ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 3595ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 359630773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 359730773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 3598ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3599ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 3600ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 3601ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 3602ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3603ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3604ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 3605ac27a0ecSDave Kleikamp } 3606ac27a0ecSDave Kleikamp #endif 3607bbd6851aSAl Viro unlock_super(sb); 3608337eb00aSAlessio Igor Bogani unlock_kernel(); 3609ac27a0ecSDave Kleikamp return err; 3610ac27a0ecSDave Kleikamp } 3611ac27a0ecSDave Kleikamp 3612617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 3613ac27a0ecSDave Kleikamp { 3614ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 3615617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3616617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 3617960cc398SPekka Enberg u64 fsid; 3618ac27a0ecSDave Kleikamp 36195e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 36205e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 36216bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 36228df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 36235e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 3624ac27a0ecSDave Kleikamp 3625ac27a0ecSDave Kleikamp /* 36265e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 36275e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 36285e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 3629ac27a0ecSDave Kleikamp */ 3630ac27a0ecSDave Kleikamp 3631ac27a0ecSDave Kleikamp /* 3632ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 3633ac27a0ecSDave Kleikamp * overhead 3634ac27a0ecSDave Kleikamp */ 3635ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 3636ac27a0ecSDave Kleikamp 3637ac27a0ecSDave Kleikamp /* 3638ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 3639ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 3640ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 3641ac27a0ecSDave Kleikamp */ 3642ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 3643617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 3644617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 3645ac27a0ecSDave Kleikamp cond_resched(); 3646ac27a0ecSDave Kleikamp } 3647ac27a0ecSDave Kleikamp 3648ac27a0ecSDave Kleikamp /* 3649ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 3650ac27a0ecSDave Kleikamp * bitmap, and an inode table. 3651ac27a0ecSDave Kleikamp */ 36525e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 36535e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 36545e70030dSBadari Pulavarty smp_wmb(); 36556bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 3656ac27a0ecSDave Kleikamp } 3657ac27a0ecSDave Kleikamp 3658617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 3659ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 36605e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 36616bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 36626bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 3663308ba3ecSAneesh Kumar K.V ext4_free_blocks_count_set(es, buf->f_bfree); 3664bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 3665bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 3666ac27a0ecSDave Kleikamp buf->f_bavail = 0; 3667ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 366852d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 36695e70030dSBadari Pulavarty es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); 3670617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 3671960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 3672960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 3673960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 3674960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 36750b8e58a1SAndreas Dilger 3676ac27a0ecSDave Kleikamp return 0; 3677ac27a0ecSDave Kleikamp } 3678ac27a0ecSDave Kleikamp 36790b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 36800b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 3681ac27a0ecSDave Kleikamp * Process 1 Process 2 3682617ba13bSMingming Cao * ext4_create() quota_sync() 3683dab291afSMingming Cao * jbd2_journal_start() write_dquot() 3684a269eb18SJan Kara * vfs_dq_init() down(dqio_mutex) 3685dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 3686ac27a0ecSDave Kleikamp * 3687ac27a0ecSDave Kleikamp */ 3688ac27a0ecSDave Kleikamp 3689ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3690ac27a0ecSDave Kleikamp 3691ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3692ac27a0ecSDave Kleikamp { 3693ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3694ac27a0ecSDave Kleikamp } 3695ac27a0ecSDave Kleikamp 3696617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3697ac27a0ecSDave Kleikamp { 3698ac27a0ecSDave Kleikamp int ret, err; 3699ac27a0ecSDave Kleikamp handle_t *handle; 3700ac27a0ecSDave Kleikamp struct inode *inode; 3701ac27a0ecSDave Kleikamp 3702ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3703617ba13bSMingming Cao handle = ext4_journal_start(inode, 3704617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3705ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3706ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3707ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3708617ba13bSMingming Cao err = ext4_journal_stop(handle); 3709ac27a0ecSDave Kleikamp if (!ret) 3710ac27a0ecSDave Kleikamp ret = err; 3711ac27a0ecSDave Kleikamp return ret; 3712ac27a0ecSDave Kleikamp } 3713ac27a0ecSDave Kleikamp 3714617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3715ac27a0ecSDave Kleikamp { 3716ac27a0ecSDave Kleikamp int ret, err; 3717ac27a0ecSDave Kleikamp handle_t *handle; 3718ac27a0ecSDave Kleikamp 3719617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3720617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3721ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3722ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3723ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 3724617ba13bSMingming Cao err = ext4_journal_stop(handle); 3725ac27a0ecSDave Kleikamp if (!ret) 3726ac27a0ecSDave Kleikamp ret = err; 3727ac27a0ecSDave Kleikamp return ret; 3728ac27a0ecSDave Kleikamp } 3729ac27a0ecSDave Kleikamp 3730617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 3731ac27a0ecSDave Kleikamp { 3732ac27a0ecSDave Kleikamp int ret, err; 3733ac27a0ecSDave Kleikamp handle_t *handle; 3734ac27a0ecSDave Kleikamp 3735617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3736617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 37379c3013e9SJan Kara if (IS_ERR(handle)) { 37389c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 37399c3013e9SJan Kara dquot_release(dquot); 3740ac27a0ecSDave Kleikamp return PTR_ERR(handle); 37419c3013e9SJan Kara } 3742ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 3743617ba13bSMingming Cao err = ext4_journal_stop(handle); 3744ac27a0ecSDave Kleikamp if (!ret) 3745ac27a0ecSDave Kleikamp ret = err; 3746ac27a0ecSDave Kleikamp return ret; 3747ac27a0ecSDave Kleikamp } 3748ac27a0ecSDave Kleikamp 3749617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 3750ac27a0ecSDave Kleikamp { 37512c8be6b2SJan Kara /* Are we journaling quotas? */ 3752617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 3753617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 3754ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 3755617ba13bSMingming Cao return ext4_write_dquot(dquot); 3756ac27a0ecSDave Kleikamp } else { 3757ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 3758ac27a0ecSDave Kleikamp } 3759ac27a0ecSDave Kleikamp } 3760ac27a0ecSDave Kleikamp 3761617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 3762ac27a0ecSDave Kleikamp { 3763ac27a0ecSDave Kleikamp int ret, err; 3764ac27a0ecSDave Kleikamp handle_t *handle; 3765ac27a0ecSDave Kleikamp 3766ac27a0ecSDave Kleikamp /* Data block + inode block */ 3767617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 3768ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3769ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3770ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 3771617ba13bSMingming Cao err = ext4_journal_stop(handle); 3772ac27a0ecSDave Kleikamp if (!ret) 3773ac27a0ecSDave Kleikamp ret = err; 3774ac27a0ecSDave Kleikamp return ret; 3775ac27a0ecSDave Kleikamp } 3776ac27a0ecSDave Kleikamp 3777ac27a0ecSDave Kleikamp /* 3778ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 3779ac27a0ecSDave Kleikamp * the quota file and such... 3780ac27a0ecSDave Kleikamp */ 3781617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 3782ac27a0ecSDave Kleikamp { 3783617ba13bSMingming Cao return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 3784617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 3785ac27a0ecSDave Kleikamp } 3786ac27a0ecSDave Kleikamp 3787ac27a0ecSDave Kleikamp /* 3788ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 3789ac27a0ecSDave Kleikamp */ 3790617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 37918264613dSAl Viro char *name, int remount) 3792ac27a0ecSDave Kleikamp { 3793ac27a0ecSDave Kleikamp int err; 37948264613dSAl Viro struct path path; 3795ac27a0ecSDave Kleikamp 3796ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 3797ac27a0ecSDave Kleikamp return -EINVAL; 37988264613dSAl Viro /* When remounting, no checks are needed and in fact, name is NULL */ 37990623543bSJan Kara if (remount) 38008264613dSAl Viro return vfs_quota_on(sb, type, format_id, name, remount); 38010623543bSJan Kara 38028264613dSAl Viro err = kern_path(name, LOOKUP_FOLLOW, &path); 3803ac27a0ecSDave Kleikamp if (err) 3804ac27a0ecSDave Kleikamp return err; 38050623543bSJan Kara 3806ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 38078264613dSAl Viro if (path.mnt->mnt_sb != sb) { 38088264613dSAl Viro path_put(&path); 3809ac27a0ecSDave Kleikamp return -EXDEV; 3810ac27a0ecSDave Kleikamp } 38110623543bSJan Kara /* Journaling quota? */ 38120623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 38132b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 38148264613dSAl Viro if (path.dentry->d_parent != sb->s_root) 3815b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3816b31e1552SEric Sandeen "Quota file not on filesystem root. " 3817b31e1552SEric Sandeen "Journaled quota will not work"); 38180623543bSJan Kara } 38190623543bSJan Kara 38200623543bSJan Kara /* 38210623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 38220623543bSJan Kara * all updates to the file when we bypass pagecache... 38230623543bSJan Kara */ 38240390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 38250390131bSFrank Mayhar ext4_should_journal_data(path.dentry->d_inode)) { 38260623543bSJan Kara /* 38270623543bSJan Kara * We don't need to lock updates but journal_flush() could 38280623543bSJan Kara * otherwise be livelocked... 38290623543bSJan Kara */ 38300623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 38317ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 38320623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 38337ffe1ea8SHidehiro Kawai if (err) { 38348264613dSAl Viro path_put(&path); 38357ffe1ea8SHidehiro Kawai return err; 38367ffe1ea8SHidehiro Kawai } 38370623543bSJan Kara } 38380623543bSJan Kara 38398264613dSAl Viro err = vfs_quota_on_path(sb, type, format_id, &path); 38408264613dSAl Viro path_put(&path); 384177e69dacSAl Viro return err; 3842ac27a0ecSDave Kleikamp } 3843ac27a0ecSDave Kleikamp 3844ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 3845ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 3846ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 3847ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 3848617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 3849ac27a0ecSDave Kleikamp size_t len, loff_t off) 3850ac27a0ecSDave Kleikamp { 3851ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3852725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3853ac27a0ecSDave Kleikamp int err = 0; 3854ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3855ac27a0ecSDave Kleikamp int tocopy; 3856ac27a0ecSDave Kleikamp size_t toread; 3857ac27a0ecSDave Kleikamp struct buffer_head *bh; 3858ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 3859ac27a0ecSDave Kleikamp 3860ac27a0ecSDave Kleikamp if (off > i_size) 3861ac27a0ecSDave Kleikamp return 0; 3862ac27a0ecSDave Kleikamp if (off+len > i_size) 3863ac27a0ecSDave Kleikamp len = i_size-off; 3864ac27a0ecSDave Kleikamp toread = len; 3865ac27a0ecSDave Kleikamp while (toread > 0) { 3866ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 3867ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 3868617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 3869ac27a0ecSDave Kleikamp if (err) 3870ac27a0ecSDave Kleikamp return err; 3871ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 3872ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 3873ac27a0ecSDave Kleikamp else 3874ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 3875ac27a0ecSDave Kleikamp brelse(bh); 3876ac27a0ecSDave Kleikamp offset = 0; 3877ac27a0ecSDave Kleikamp toread -= tocopy; 3878ac27a0ecSDave Kleikamp data += tocopy; 3879ac27a0ecSDave Kleikamp blk++; 3880ac27a0ecSDave Kleikamp } 3881ac27a0ecSDave Kleikamp return len; 3882ac27a0ecSDave Kleikamp } 3883ac27a0ecSDave Kleikamp 3884ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 3885ac27a0ecSDave Kleikamp * enough credits) */ 3886617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 3887ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 3888ac27a0ecSDave Kleikamp { 3889ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3890725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3891ac27a0ecSDave Kleikamp int err = 0; 3892ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3893ac27a0ecSDave Kleikamp int tocopy; 3894617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 3895ac27a0ecSDave Kleikamp size_t towrite = len; 3896ac27a0ecSDave Kleikamp struct buffer_head *bh; 3897ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 3898ac27a0ecSDave Kleikamp 38990390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 3900b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 3901b31e1552SEric Sandeen " cancelled because transaction is not started", 39029c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 39039c3013e9SJan Kara return -EIO; 39049c3013e9SJan Kara } 3905ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 3906ac27a0ecSDave Kleikamp while (towrite > 0) { 3907ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < towrite ? 3908ac27a0ecSDave Kleikamp sb->s_blocksize - offset : towrite; 3909617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 3910ac27a0ecSDave Kleikamp if (!bh) 3911ac27a0ecSDave Kleikamp goto out; 3912ac27a0ecSDave Kleikamp if (journal_quota) { 3913617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 3914ac27a0ecSDave Kleikamp if (err) { 3915ac27a0ecSDave Kleikamp brelse(bh); 3916ac27a0ecSDave Kleikamp goto out; 3917ac27a0ecSDave Kleikamp } 3918ac27a0ecSDave Kleikamp } 3919ac27a0ecSDave Kleikamp lock_buffer(bh); 3920ac27a0ecSDave Kleikamp memcpy(bh->b_data+offset, data, tocopy); 3921ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 3922ac27a0ecSDave Kleikamp unlock_buffer(bh); 3923ac27a0ecSDave Kleikamp if (journal_quota) 39240390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 3925ac27a0ecSDave Kleikamp else { 3926ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 3927678aaf48SJan Kara err = ext4_jbd2_file_inode(handle, inode); 3928ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 3929ac27a0ecSDave Kleikamp } 3930ac27a0ecSDave Kleikamp brelse(bh); 3931ac27a0ecSDave Kleikamp if (err) 3932ac27a0ecSDave Kleikamp goto out; 3933ac27a0ecSDave Kleikamp offset = 0; 3934ac27a0ecSDave Kleikamp towrite -= tocopy; 3935ac27a0ecSDave Kleikamp data += tocopy; 3936ac27a0ecSDave Kleikamp blk++; 3937ac27a0ecSDave Kleikamp } 3938ac27a0ecSDave Kleikamp out: 39394d04e4fbSJan Kara if (len == towrite) { 39404d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 3941ac27a0ecSDave Kleikamp return err; 39424d04e4fbSJan Kara } 3943ac27a0ecSDave Kleikamp if (inode->i_size < off+len-towrite) { 3944ac27a0ecSDave Kleikamp i_size_write(inode, off+len-towrite); 3945617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 3946ac27a0ecSDave Kleikamp } 3947ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 3948617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 3949ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 3950ac27a0ecSDave Kleikamp return len - towrite; 3951ac27a0ecSDave Kleikamp } 3952ac27a0ecSDave Kleikamp 3953ac27a0ecSDave Kleikamp #endif 3954ac27a0ecSDave Kleikamp 39550b8e58a1SAndreas Dilger static int ext4_get_sb(struct file_system_type *fs_type, int flags, 39560b8e58a1SAndreas Dilger const char *dev_name, void *data, struct vfsmount *mnt) 3957ac27a0ecSDave Kleikamp { 3958617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); 3959ac27a0ecSDave Kleikamp } 3960ac27a0ecSDave Kleikamp 396103010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 3962ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 396303010a33STheodore Ts'o .name = "ext4", 3964617ba13bSMingming Cao .get_sb = ext4_get_sb, 3965ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 3966ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 3967ac27a0ecSDave Kleikamp }; 3968ac27a0ecSDave Kleikamp 396903010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 39700b8e58a1SAndreas Dilger static int ext4dev_get_sb(struct file_system_type *fs_type, int flags, 39710b8e58a1SAndreas Dilger const char *dev_name, void *data,struct vfsmount *mnt) 397203010a33STheodore Ts'o { 3973b31e1552SEric Sandeen printk(KERN_WARNING "EXT4-fs (%s): Update your userspace programs " 3974b31e1552SEric Sandeen "to mount using ext4\n", dev_name); 3975b31e1552SEric Sandeen printk(KERN_WARNING "EXT4-fs (%s): ext4dev backwards compatibility " 3976b31e1552SEric Sandeen "will go away by 2.6.31\n", dev_name); 397703010a33STheodore Ts'o return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); 397803010a33STheodore Ts'o } 397903010a33STheodore Ts'o 398003010a33STheodore Ts'o static struct file_system_type ext4dev_fs_type = { 398103010a33STheodore Ts'o .owner = THIS_MODULE, 398203010a33STheodore Ts'o .name = "ext4dev", 398303010a33STheodore Ts'o .get_sb = ext4dev_get_sb, 398403010a33STheodore Ts'o .kill_sb = kill_block_super, 398503010a33STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 398603010a33STheodore Ts'o }; 398703010a33STheodore Ts'o MODULE_ALIAS("ext4dev"); 398803010a33STheodore Ts'o #endif 398903010a33STheodore Ts'o 3990617ba13bSMingming Cao static int __init init_ext4_fs(void) 3991ac27a0ecSDave Kleikamp { 3992c9de560dSAlex Tomas int err; 3993c9de560dSAlex Tomas 39946fd058f7STheodore Ts'o err = init_ext4_system_zone(); 39956fd058f7STheodore Ts'o if (err) 39966fd058f7STheodore Ts'o return err; 39973197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 39983197ebdbSTheodore Ts'o if (!ext4_kset) 39996fd058f7STheodore Ts'o goto out4; 40009f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 4001c9de560dSAlex Tomas err = init_ext4_mballoc(); 4002ac27a0ecSDave Kleikamp if (err) 40036fd058f7STheodore Ts'o goto out3; 4004c9de560dSAlex Tomas 4005c9de560dSAlex Tomas err = init_ext4_xattr(); 4006c9de560dSAlex Tomas if (err) 4007c9de560dSAlex Tomas goto out2; 4008ac27a0ecSDave Kleikamp err = init_inodecache(); 4009ac27a0ecSDave Kleikamp if (err) 4010ac27a0ecSDave Kleikamp goto out1; 401103010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 4012ac27a0ecSDave Kleikamp if (err) 4013ac27a0ecSDave Kleikamp goto out; 401403010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 401503010a33STheodore Ts'o err = register_filesystem(&ext4dev_fs_type); 401603010a33STheodore Ts'o if (err) { 401703010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 401803010a33STheodore Ts'o goto out; 401903010a33STheodore Ts'o } 402003010a33STheodore Ts'o #endif 4021ac27a0ecSDave Kleikamp return 0; 4022ac27a0ecSDave Kleikamp out: 4023ac27a0ecSDave Kleikamp destroy_inodecache(); 4024ac27a0ecSDave Kleikamp out1: 4025617ba13bSMingming Cao exit_ext4_xattr(); 4026c9de560dSAlex Tomas out2: 4027c9de560dSAlex Tomas exit_ext4_mballoc(); 40286fd058f7STheodore Ts'o out3: 40296fd058f7STheodore Ts'o remove_proc_entry("fs/ext4", NULL); 40306fd058f7STheodore Ts'o kset_unregister(ext4_kset); 40316fd058f7STheodore Ts'o out4: 40326fd058f7STheodore Ts'o exit_ext4_system_zone(); 4033ac27a0ecSDave Kleikamp return err; 4034ac27a0ecSDave Kleikamp } 4035ac27a0ecSDave Kleikamp 4036617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 4037ac27a0ecSDave Kleikamp { 403803010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 403903010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 4040617ba13bSMingming Cao unregister_filesystem(&ext4dev_fs_type); 404103010a33STheodore Ts'o #endif 4042ac27a0ecSDave Kleikamp destroy_inodecache(); 4043617ba13bSMingming Cao exit_ext4_xattr(); 4044c9de560dSAlex Tomas exit_ext4_mballoc(); 40459f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 40463197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 40476fd058f7STheodore Ts'o exit_ext4_system_zone(); 4048ac27a0ecSDave Kleikamp } 4049ac27a0ecSDave Kleikamp 4050ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 405183982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 4052ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 4053617ba13bSMingming Cao module_init(init_ext4_fs) 4054617ba13bSMingming Cao module_exit(exit_ext4_fs) 4055