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/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 379f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 417abc52c2SDan Magenheimer #include <linux/cleancache.h> 42ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 43ac27a0ecSDave Kleikamp 44bfff6873SLukas Czerner #include <linux/kthread.h> 45bfff6873SLukas Czerner #include <linux/freezer.h> 46bfff6873SLukas Czerner 473dcf5451SChristoph Hellwig #include "ext4.h" 483dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 49ac27a0ecSDave Kleikamp #include "xattr.h" 50ac27a0ecSDave Kleikamp #include "acl.h" 513661d286STheodore Ts'o #include "mballoc.h" 52ac27a0ecSDave Kleikamp 539bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 549bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 559bffad1eSTheodore Ts'o 561f109d5aSTheodore Ts'o static struct proc_dir_entry *ext4_proc_root; 573197ebdbSTheodore Ts'o static struct kset *ext4_kset; 580b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 590b75a840SLukas Czerner static struct mutex ext4_li_mtx; 600b75a840SLukas Czerner static struct ext4_features *ext4_feat; 619f6200bbSTheodore Ts'o 62617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 63ac27a0ecSDave Kleikamp unsigned long journal_devnum); 64e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 65617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 66617ba13bSMingming Cao struct ext4_super_block *es); 67617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 68617ba13bSMingming Cao struct ext4_super_block *es); 69617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 70617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 71ac27a0ecSDave Kleikamp char nbuf[16]); 72617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 73617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 74c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 75617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 76c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 77152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 78152a0836SAl Viro const char *dev_name, void *data); 792035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 802035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 81d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 82bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 83bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 848f1f7453SEric Sandeen static void ext4_clear_request_list(void); 85ac27a0ecSDave Kleikamp 862035e776STheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 872035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 882035e776STheodore Ts'o .owner = THIS_MODULE, 892035e776STheodore Ts'o .name = "ext2", 902035e776STheodore Ts'o .mount = ext4_mount, 912035e776STheodore Ts'o .kill_sb = kill_block_super, 922035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 932035e776STheodore Ts'o }; 942035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 952035e776STheodore Ts'o #else 962035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 972035e776STheodore Ts'o #endif 982035e776STheodore Ts'o 992035e776STheodore Ts'o 100ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 101ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 102ba69f9abSJan Kara .owner = THIS_MODULE, 103ba69f9abSJan Kara .name = "ext3", 104152a0836SAl Viro .mount = ext4_mount, 105ba69f9abSJan Kara .kill_sb = kill_block_super, 106ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 107ba69f9abSJan Kara }; 108ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 109ba69f9abSJan Kara #else 110ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 111ba69f9abSJan Kara #endif 112bd81d8eeSLaurent Vivier 1139933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1149933fc0aSTheodore Ts'o { 1159933fc0aSTheodore Ts'o void *ret; 1169933fc0aSTheodore Ts'o 1179933fc0aSTheodore Ts'o ret = kmalloc(size, flags); 1189933fc0aSTheodore Ts'o if (!ret) 1199933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1209933fc0aSTheodore Ts'o return ret; 1219933fc0aSTheodore Ts'o } 1229933fc0aSTheodore Ts'o 1239933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1249933fc0aSTheodore Ts'o { 1259933fc0aSTheodore Ts'o void *ret; 1269933fc0aSTheodore Ts'o 127db9481c0SMathias Krause ret = kzalloc(size, flags); 1289933fc0aSTheodore Ts'o if (!ret) 1299933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1309933fc0aSTheodore Ts'o return ret; 1319933fc0aSTheodore Ts'o } 1329933fc0aSTheodore Ts'o 1339933fc0aSTheodore Ts'o void ext4_kvfree(void *ptr) 1349933fc0aSTheodore Ts'o { 1359933fc0aSTheodore Ts'o if (is_vmalloc_addr(ptr)) 1369933fc0aSTheodore Ts'o vfree(ptr); 1379933fc0aSTheodore Ts'o else 1389933fc0aSTheodore Ts'o kfree(ptr); 1399933fc0aSTheodore Ts'o 1409933fc0aSTheodore Ts'o } 1419933fc0aSTheodore Ts'o 1428fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1438fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 144bd81d8eeSLaurent Vivier { 1453a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1468fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1478fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 148bd81d8eeSLaurent Vivier } 149bd81d8eeSLaurent Vivier 1508fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1518fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 152bd81d8eeSLaurent Vivier { 1535272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 1548fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1558fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 156bd81d8eeSLaurent Vivier } 157bd81d8eeSLaurent Vivier 1588fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 1598fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 160bd81d8eeSLaurent Vivier { 1615272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 1628fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1638fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 164bd81d8eeSLaurent Vivier } 165bd81d8eeSLaurent Vivier 166560671a0SAneesh Kumar K.V __u32 ext4_free_blks_count(struct super_block *sb, 167560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 168560671a0SAneesh Kumar K.V { 169560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 170560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 171560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 172560671a0SAneesh Kumar K.V } 173560671a0SAneesh Kumar K.V 174560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 175560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 176560671a0SAneesh Kumar K.V { 177560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 178560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 179560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 180560671a0SAneesh Kumar K.V } 181560671a0SAneesh Kumar K.V 182560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 183560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 184560671a0SAneesh Kumar K.V { 185560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 186560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 187560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 188560671a0SAneesh Kumar K.V } 189560671a0SAneesh Kumar K.V 190560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 191560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 192560671a0SAneesh Kumar K.V { 193560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 194560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 195560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 196560671a0SAneesh Kumar K.V } 197560671a0SAneesh Kumar K.V 1988fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 1998fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 200bd81d8eeSLaurent Vivier { 2013a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2028fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2038fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 204bd81d8eeSLaurent Vivier } 205bd81d8eeSLaurent Vivier 2068fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2078fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 208bd81d8eeSLaurent Vivier { 2095272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2108fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2118fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 212bd81d8eeSLaurent Vivier } 213bd81d8eeSLaurent Vivier 2148fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2158fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 216bd81d8eeSLaurent Vivier { 2175272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2188fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2198fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 220bd81d8eeSLaurent Vivier } 221bd81d8eeSLaurent Vivier 222560671a0SAneesh Kumar K.V void ext4_free_blks_set(struct super_block *sb, 223560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 224560671a0SAneesh Kumar K.V { 225560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 226560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 227560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 228560671a0SAneesh Kumar K.V } 229560671a0SAneesh Kumar K.V 230560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 231560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 232560671a0SAneesh Kumar K.V { 233560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 234560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 235560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 236560671a0SAneesh Kumar K.V } 237560671a0SAneesh Kumar K.V 238560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 239560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 240560671a0SAneesh Kumar K.V { 241560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 242560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 243560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 244560671a0SAneesh Kumar K.V } 245560671a0SAneesh Kumar K.V 246560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 247560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 248560671a0SAneesh Kumar K.V { 249560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 250560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 251560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 252560671a0SAneesh Kumar K.V } 253560671a0SAneesh Kumar K.V 254d3d1faf6SCurt Wohlgemuth 255d3d1faf6SCurt Wohlgemuth /* Just increment the non-pointer handle value */ 256d3d1faf6SCurt Wohlgemuth static handle_t *ext4_get_nojournal(void) 257d3d1faf6SCurt Wohlgemuth { 258d3d1faf6SCurt Wohlgemuth handle_t *handle = current->journal_info; 259d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 260d3d1faf6SCurt Wohlgemuth 261d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); 262d3d1faf6SCurt Wohlgemuth 263d3d1faf6SCurt Wohlgemuth ref_cnt++; 264d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 265d3d1faf6SCurt Wohlgemuth 266d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 267d3d1faf6SCurt Wohlgemuth return handle; 268d3d1faf6SCurt Wohlgemuth } 269d3d1faf6SCurt Wohlgemuth 270d3d1faf6SCurt Wohlgemuth 271d3d1faf6SCurt Wohlgemuth /* Decrement the non-pointer handle value */ 272d3d1faf6SCurt Wohlgemuth static void ext4_put_nojournal(handle_t *handle) 273d3d1faf6SCurt Wohlgemuth { 274d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 275d3d1faf6SCurt Wohlgemuth 276d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt == 0); 277d3d1faf6SCurt Wohlgemuth 278d3d1faf6SCurt Wohlgemuth ref_cnt--; 279d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 280d3d1faf6SCurt Wohlgemuth 281d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 282d3d1faf6SCurt Wohlgemuth } 283d3d1faf6SCurt Wohlgemuth 284ac27a0ecSDave Kleikamp /* 285dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 286ac27a0ecSDave Kleikamp * 287ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 288ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 289ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 290ac27a0ecSDave Kleikamp * appropriate. 291be4f27d3SYongqiang Yang * 292be4f27d3SYongqiang Yang * To avoid j_barrier hold in userspace when a user calls freeze(), 293be4f27d3SYongqiang Yang * ext4 prevents a new handle from being started by s_frozen, which 294be4f27d3SYongqiang Yang * is in an upper layer. 295ac27a0ecSDave Kleikamp */ 296617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 297ac27a0ecSDave Kleikamp { 298ac27a0ecSDave Kleikamp journal_t *journal; 299be4f27d3SYongqiang Yang handle_t *handle; 300ac27a0ecSDave Kleikamp 30112706394STheodore Ts'o trace_ext4_journal_start(sb, nblocks, _RET_IP_); 302ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 303ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 304ac27a0ecSDave Kleikamp 305617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 306be4f27d3SYongqiang Yang handle = ext4_journal_current_handle(); 307be4f27d3SYongqiang Yang 308be4f27d3SYongqiang Yang /* 309be4f27d3SYongqiang Yang * If a handle has been started, it should be allowed to 310be4f27d3SYongqiang Yang * finish, otherwise deadlock could happen between freeze 311be4f27d3SYongqiang Yang * and others(e.g. truncate) due to the restart of the 312be4f27d3SYongqiang Yang * journal handle if the filesystem is forzen and active 313be4f27d3SYongqiang Yang * handles are not stopped. 314be4f27d3SYongqiang Yang */ 315be4f27d3SYongqiang Yang if (!handle) 316be4f27d3SYongqiang Yang vfs_check_frozen(sb, SB_FREEZE_TRANS); 317be4f27d3SYongqiang Yang 318be4f27d3SYongqiang Yang if (!journal) 319be4f27d3SYongqiang Yang return ext4_get_nojournal(); 320be4f27d3SYongqiang Yang /* 321be4f27d3SYongqiang Yang * Special case here: if the journal has aborted behind our 322be4f27d3SYongqiang Yang * backs (eg. EIO in the commit thread), then we still need to 323be4f27d3SYongqiang Yang * take the FS itself readonly cleanly. 324be4f27d3SYongqiang Yang */ 325ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 326c67d859eSTheodore Ts'o ext4_abort(sb, "Detected aborted journal"); 327ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 328ac27a0ecSDave Kleikamp } 329dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 330ac27a0ecSDave Kleikamp } 331ac27a0ecSDave Kleikamp 332ac27a0ecSDave Kleikamp /* 333ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 334dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 335ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 336ac27a0ecSDave Kleikamp * appropriate. 337ac27a0ecSDave Kleikamp */ 338c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) 339ac27a0ecSDave Kleikamp { 340ac27a0ecSDave Kleikamp struct super_block *sb; 341ac27a0ecSDave Kleikamp int err; 342ac27a0ecSDave Kleikamp int rc; 343ac27a0ecSDave Kleikamp 3440390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 345d3d1faf6SCurt Wohlgemuth ext4_put_nojournal(handle); 3460390131bSFrank Mayhar return 0; 3470390131bSFrank Mayhar } 348ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 349ac27a0ecSDave Kleikamp err = handle->h_err; 350dab291afSMingming Cao rc = jbd2_journal_stop(handle); 351ac27a0ecSDave Kleikamp 352ac27a0ecSDave Kleikamp if (!err) 353ac27a0ecSDave Kleikamp err = rc; 354ac27a0ecSDave Kleikamp if (err) 355c398eda0STheodore Ts'o __ext4_std_error(sb, where, line, err); 356ac27a0ecSDave Kleikamp return err; 357ac27a0ecSDave Kleikamp } 358ac27a0ecSDave Kleikamp 35990c7201bSTheodore Ts'o void ext4_journal_abort_handle(const char *caller, unsigned int line, 36090c7201bSTheodore Ts'o const char *err_fn, struct buffer_head *bh, 36190c7201bSTheodore Ts'o handle_t *handle, int err) 362ac27a0ecSDave Kleikamp { 363ac27a0ecSDave Kleikamp char nbuf[16]; 364617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 365ac27a0ecSDave Kleikamp 3660390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 3670390131bSFrank Mayhar 368ac27a0ecSDave Kleikamp if (bh) 369ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 370ac27a0ecSDave Kleikamp 371ac27a0ecSDave Kleikamp if (!handle->h_err) 372ac27a0ecSDave Kleikamp handle->h_err = err; 373ac27a0ecSDave Kleikamp 374ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 375ac27a0ecSDave Kleikamp return; 376ac27a0ecSDave Kleikamp 37790c7201bSTheodore Ts'o printk(KERN_ERR "%s:%d: aborting transaction: %s in %s\n", 37890c7201bSTheodore Ts'o caller, line, errstr, err_fn); 379ac27a0ecSDave Kleikamp 380dab291afSMingming Cao jbd2_journal_abort_handle(handle); 381ac27a0ecSDave Kleikamp } 382ac27a0ecSDave Kleikamp 3831c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3841c13d5c0STheodore Ts'o unsigned int line) 3851c13d5c0STheodore Ts'o { 3861c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3871c13d5c0STheodore Ts'o 3881c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3891c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3901c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3911c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3921c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3931c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3941c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3951c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3961c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3971c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3981c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3991c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 4001c13d5c0STheodore Ts'o } 40166e61a9eSTheodore Ts'o /* 40266e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 40366e61a9eSTheodore Ts'o * started already 40466e61a9eSTheodore Ts'o */ 40566e61a9eSTheodore Ts'o if (!es->s_error_count) 40666e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 4071c13d5c0STheodore Ts'o es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); 4081c13d5c0STheodore Ts'o } 4091c13d5c0STheodore Ts'o 4101c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 4111c13d5c0STheodore Ts'o unsigned int line) 4121c13d5c0STheodore Ts'o { 4131c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 4141c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 4151c13d5c0STheodore Ts'o } 4161c13d5c0STheodore Ts'o 4171c13d5c0STheodore Ts'o 418ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 419ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 420ac27a0ecSDave Kleikamp * 421ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 422617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 423ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 424ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 425ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 426ac27a0ecSDave Kleikamp * write out the superblock safely. 427ac27a0ecSDave Kleikamp * 428dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 429d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 430ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 431ac27a0ecSDave Kleikamp */ 432ac27a0ecSDave Kleikamp 433617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 434ac27a0ecSDave Kleikamp { 435ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 436ac27a0ecSDave Kleikamp return; 437ac27a0ecSDave Kleikamp 438ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 439617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 440ac27a0ecSDave Kleikamp 4414ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 442ac27a0ecSDave Kleikamp if (journal) 443dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 444ac27a0ecSDave Kleikamp } 445ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 446b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 447ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 448ac27a0ecSDave Kleikamp } 449ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 450617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 451ac27a0ecSDave Kleikamp sb->s_id); 452ac27a0ecSDave Kleikamp } 453ac27a0ecSDave Kleikamp 45412062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 455c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 456ac27a0ecSDave Kleikamp { 4570ff2ea7dSJoe Perches struct va_format vaf; 458ac27a0ecSDave Kleikamp va_list args; 459ac27a0ecSDave Kleikamp 460ac27a0ecSDave Kleikamp va_start(args, fmt); 4610ff2ea7dSJoe Perches vaf.fmt = fmt; 4620ff2ea7dSJoe Perches vaf.va = &args; 4630ff2ea7dSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4640ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 465ac27a0ecSDave Kleikamp va_end(args); 466ac27a0ecSDave Kleikamp 467617ba13bSMingming Cao ext4_handle_error(sb); 468ac27a0ecSDave Kleikamp } 469ac27a0ecSDave Kleikamp 470c398eda0STheodore Ts'o void ext4_error_inode(struct inode *inode, const char *function, 471c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 472273df556SFrank Mayhar const char *fmt, ...) 473273df556SFrank Mayhar { 474273df556SFrank Mayhar va_list args; 475f7c21177STheodore Ts'o struct va_format vaf; 4761c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 477273df556SFrank Mayhar 4781c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4791c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 4801c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 481273df556SFrank Mayhar va_start(args, fmt); 482f7c21177STheodore Ts'o vaf.fmt = fmt; 483f7c21177STheodore Ts'o vaf.va = &args; 484c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 485c398eda0STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 486c398eda0STheodore Ts'o if (block) 487f7c21177STheodore Ts'o printk(KERN_CONT "block %llu: ", block); 488f7c21177STheodore Ts'o printk(KERN_CONT "comm %s: %pV\n", current->comm, &vaf); 489273df556SFrank Mayhar va_end(args); 490273df556SFrank Mayhar 491273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 492273df556SFrank Mayhar } 493273df556SFrank Mayhar 494c398eda0STheodore Ts'o void ext4_error_file(struct file *file, const char *function, 495f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 496f7c21177STheodore Ts'o const char *fmt, ...) 497273df556SFrank Mayhar { 498273df556SFrank Mayhar va_list args; 499f7c21177STheodore Ts'o struct va_format vaf; 5001c13d5c0STheodore Ts'o struct ext4_super_block *es; 501273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 502273df556SFrank Mayhar char pathname[80], *path; 503273df556SFrank Mayhar 5041c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 5051c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 5061c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 507273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 508f9a62d09SDan Carpenter if (IS_ERR(path)) 509273df556SFrank Mayhar path = "(unknown)"; 510273df556SFrank Mayhar printk(KERN_CRIT 511f7c21177STheodore Ts'o "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 512f7c21177STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 513f7c21177STheodore Ts'o if (block) 514f7c21177STheodore Ts'o printk(KERN_CONT "block %llu: ", block); 515f7c21177STheodore Ts'o va_start(args, fmt); 516f7c21177STheodore Ts'o vaf.fmt = fmt; 517f7c21177STheodore Ts'o vaf.va = &args; 518f7c21177STheodore Ts'o printk(KERN_CONT "comm %s: path %s: %pV\n", current->comm, path, &vaf); 519273df556SFrank Mayhar va_end(args); 520273df556SFrank Mayhar 521273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 522273df556SFrank Mayhar } 523273df556SFrank Mayhar 524617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 525ac27a0ecSDave Kleikamp char nbuf[16]) 526ac27a0ecSDave Kleikamp { 527ac27a0ecSDave Kleikamp char *errstr = NULL; 528ac27a0ecSDave Kleikamp 529ac27a0ecSDave Kleikamp switch (errno) { 530ac27a0ecSDave Kleikamp case -EIO: 531ac27a0ecSDave Kleikamp errstr = "IO failure"; 532ac27a0ecSDave Kleikamp break; 533ac27a0ecSDave Kleikamp case -ENOMEM: 534ac27a0ecSDave Kleikamp errstr = "Out of memory"; 535ac27a0ecSDave Kleikamp break; 536ac27a0ecSDave Kleikamp case -EROFS: 53778f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 53878f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 539ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 540ac27a0ecSDave Kleikamp else 541ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 542ac27a0ecSDave Kleikamp break; 543ac27a0ecSDave Kleikamp default: 544ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 545ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 546ac27a0ecSDave Kleikamp * NULL. */ 547ac27a0ecSDave Kleikamp if (nbuf) { 548ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 549ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 550ac27a0ecSDave Kleikamp errstr = nbuf; 551ac27a0ecSDave Kleikamp } 552ac27a0ecSDave Kleikamp break; 553ac27a0ecSDave Kleikamp } 554ac27a0ecSDave Kleikamp 555ac27a0ecSDave Kleikamp return errstr; 556ac27a0ecSDave Kleikamp } 557ac27a0ecSDave Kleikamp 558617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 559ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 560ac27a0ecSDave Kleikamp 561c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 562c398eda0STheodore Ts'o unsigned int line, int errno) 563ac27a0ecSDave Kleikamp { 564ac27a0ecSDave Kleikamp char nbuf[16]; 565ac27a0ecSDave Kleikamp const char *errstr; 566ac27a0ecSDave Kleikamp 567ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 568ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 569ac27a0ecSDave Kleikamp * an error. */ 570ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 571ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 572ac27a0ecSDave Kleikamp return; 573ac27a0ecSDave Kleikamp 574617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 575c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 576c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 5771c13d5c0STheodore Ts'o save_error_info(sb, function, line); 578ac27a0ecSDave Kleikamp 579617ba13bSMingming Cao ext4_handle_error(sb); 580ac27a0ecSDave Kleikamp } 581ac27a0ecSDave Kleikamp 582ac27a0ecSDave Kleikamp /* 583617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 584ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 585ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 586ac27a0ecSDave Kleikamp * 587ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 588ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 589ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 590ac27a0ecSDave Kleikamp */ 591ac27a0ecSDave Kleikamp 592c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 593c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 594ac27a0ecSDave Kleikamp { 595ac27a0ecSDave Kleikamp va_list args; 596ac27a0ecSDave Kleikamp 5971c13d5c0STheodore Ts'o save_error_info(sb, function, line); 598ac27a0ecSDave Kleikamp va_start(args, fmt); 599c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 600c398eda0STheodore Ts'o function, line); 601ac27a0ecSDave Kleikamp vprintk(fmt, args); 602ac27a0ecSDave Kleikamp printk("\n"); 603ac27a0ecSDave Kleikamp va_end(args); 604ac27a0ecSDave Kleikamp 6051c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 606b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 607ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 6084ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 609ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 610dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 6111c13d5c0STheodore Ts'o save_error_info(sb, function, line); 6121c13d5c0STheodore Ts'o } 6131c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 6141c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 615ac27a0ecSDave Kleikamp } 616ac27a0ecSDave Kleikamp 6170ff2ea7dSJoe Perches void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) 618b31e1552SEric Sandeen { 6190ff2ea7dSJoe Perches struct va_format vaf; 620b31e1552SEric Sandeen va_list args; 621b31e1552SEric Sandeen 622b31e1552SEric Sandeen va_start(args, fmt); 6230ff2ea7dSJoe Perches vaf.fmt = fmt; 6240ff2ea7dSJoe Perches vaf.va = &args; 6250ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 626b31e1552SEric Sandeen va_end(args); 627b31e1552SEric Sandeen } 628b31e1552SEric Sandeen 62912062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 630c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 631ac27a0ecSDave Kleikamp { 6320ff2ea7dSJoe Perches struct va_format vaf; 633ac27a0ecSDave Kleikamp va_list args; 634ac27a0ecSDave Kleikamp 635ac27a0ecSDave Kleikamp va_start(args, fmt); 6360ff2ea7dSJoe Perches vaf.fmt = fmt; 6370ff2ea7dSJoe Perches vaf.va = &args; 6380ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6390ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 640ac27a0ecSDave Kleikamp va_end(args); 641ac27a0ecSDave Kleikamp } 642ac27a0ecSDave Kleikamp 643e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 644e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 645e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 646e29136f8STheodore Ts'o const char *fmt, ...) 6475d1b1b3fSAneesh Kumar K.V __releases(bitlock) 6485d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 6495d1b1b3fSAneesh Kumar K.V { 6500ff2ea7dSJoe Perches struct va_format vaf; 6515d1b1b3fSAneesh Kumar K.V va_list args; 6525d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 6535d1b1b3fSAneesh Kumar K.V 6541c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 6551c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 6561c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 6570ff2ea7dSJoe Perches 6585d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 6590ff2ea7dSJoe Perches 6600ff2ea7dSJoe Perches vaf.fmt = fmt; 6610ff2ea7dSJoe Perches vaf.va = &args; 66221149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 663e29136f8STheodore Ts'o sb->s_id, function, line, grp); 664e29136f8STheodore Ts'o if (ino) 6650ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 666e29136f8STheodore Ts'o if (block) 6670ff2ea7dSJoe Perches printk(KERN_CONT "block %llu:", (unsigned long long) block); 6680ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 6695d1b1b3fSAneesh Kumar K.V va_end(args); 6705d1b1b3fSAneesh Kumar K.V 6715d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 672e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 6735d1b1b3fSAneesh Kumar K.V return; 6745d1b1b3fSAneesh Kumar K.V } 6751c13d5c0STheodore Ts'o 6765d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6775d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6785d1b1b3fSAneesh Kumar K.V /* 6795d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6805d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6815d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6825d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6835d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 68425985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 6855d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 6865d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 6875d1b1b3fSAneesh Kumar K.V * more appropriate error code. 6885d1b1b3fSAneesh Kumar K.V */ 6895d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 6905d1b1b3fSAneesh Kumar K.V return; 6915d1b1b3fSAneesh Kumar K.V } 6925d1b1b3fSAneesh Kumar K.V 693617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 694ac27a0ecSDave Kleikamp { 695617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 696ac27a0ecSDave Kleikamp 697617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 698ac27a0ecSDave Kleikamp return; 699ac27a0ecSDave Kleikamp 70012062dddSEric Sandeen ext4_warning(sb, 701ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 702ac27a0ecSDave Kleikamp "running e2fsck is recommended", 703617ba13bSMingming Cao EXT4_DYNAMIC_REV); 704ac27a0ecSDave Kleikamp 705617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 706617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 707617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 708ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 709ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 710ac27a0ecSDave Kleikamp 711ac27a0ecSDave Kleikamp /* 712ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 713ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 714ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 715ac27a0ecSDave Kleikamp */ 716ac27a0ecSDave Kleikamp } 717ac27a0ecSDave Kleikamp 718ac27a0ecSDave Kleikamp /* 719ac27a0ecSDave Kleikamp * Open the external journal device 720ac27a0ecSDave Kleikamp */ 721b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 722ac27a0ecSDave Kleikamp { 723ac27a0ecSDave Kleikamp struct block_device *bdev; 724ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 725ac27a0ecSDave Kleikamp 726d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 727ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 728ac27a0ecSDave Kleikamp goto fail; 729ac27a0ecSDave Kleikamp return bdev; 730ac27a0ecSDave Kleikamp 731ac27a0ecSDave Kleikamp fail: 732b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 733ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 734ac27a0ecSDave Kleikamp return NULL; 735ac27a0ecSDave Kleikamp } 736ac27a0ecSDave Kleikamp 737ac27a0ecSDave Kleikamp /* 738ac27a0ecSDave Kleikamp * Release the journal device 739ac27a0ecSDave Kleikamp */ 740617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 741ac27a0ecSDave Kleikamp { 742e525fd89STejun Heo return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 743ac27a0ecSDave Kleikamp } 744ac27a0ecSDave Kleikamp 745617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 746ac27a0ecSDave Kleikamp { 747ac27a0ecSDave Kleikamp struct block_device *bdev; 748ac27a0ecSDave Kleikamp int ret = -ENODEV; 749ac27a0ecSDave Kleikamp 750ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 751ac27a0ecSDave Kleikamp if (bdev) { 752617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 753ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 754ac27a0ecSDave Kleikamp } 755ac27a0ecSDave Kleikamp return ret; 756ac27a0ecSDave Kleikamp } 757ac27a0ecSDave Kleikamp 758ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 759ac27a0ecSDave Kleikamp { 760617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 761ac27a0ecSDave Kleikamp } 762ac27a0ecSDave Kleikamp 763617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 764ac27a0ecSDave Kleikamp { 765ac27a0ecSDave Kleikamp struct list_head *l; 766ac27a0ecSDave Kleikamp 767b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 768ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 769ac27a0ecSDave Kleikamp 770ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 771ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 772ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 773ac27a0ecSDave Kleikamp printk(KERN_ERR " " 774ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 775ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 776ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 777ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 778ac27a0ecSDave Kleikamp } 779ac27a0ecSDave Kleikamp } 780ac27a0ecSDave Kleikamp 781617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 782ac27a0ecSDave Kleikamp { 783617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 784617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 785ef2cabf7SHidehiro Kawai int i, err; 786ac27a0ecSDave Kleikamp 787857ac889SLukas Czerner ext4_unregister_li_request(sb); 788e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 789e0ccfd95SChristoph Hellwig 7904c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 7914c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 7924c0425ffSMingming Cao 793a9e220f8SAl Viro lock_super(sb); 7948c85e125SChristoph Hellwig if (sb->s_dirt) 795ebc1ac16SChristoph Hellwig ext4_commit_super(sb, 1); 7968c85e125SChristoph Hellwig 7970390131bSFrank Mayhar if (sbi->s_journal) { 798ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 79947b4a50bSJan Kara sbi->s_journal = NULL; 800ef2cabf7SHidehiro Kawai if (err < 0) 801c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 8020390131bSFrank Mayhar } 803d4edac31SJosef Bacik 804a1c6c569SSergey Senozhatsky del_timer(&sbi->s_err_report); 805d4edac31SJosef Bacik ext4_release_system_zone(sb); 806d4edac31SJosef Bacik ext4_mb_release(sb); 807d4edac31SJosef Bacik ext4_ext_release(sb); 808d4edac31SJosef Bacik ext4_xattr_put_super(sb); 809d4edac31SJosef Bacik 810ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 811617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 812ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 813e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 814ac27a0ecSDave Kleikamp } 815240799cdSTheodore Ts'o if (sbi->s_proc) { 8169f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 817240799cdSTheodore Ts'o } 8183197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 819ac27a0ecSDave Kleikamp 820ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 821ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 822f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 8239933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 824ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 825ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 826ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 8276bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 828ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 829ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 830ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 831ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 832ac27a0ecSDave Kleikamp #endif 833ac27a0ecSDave Kleikamp 834ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 835ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 836ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 837ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 838ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 839ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 840ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 841ac27a0ecSDave Kleikamp 842f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 843ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 844ac27a0ecSDave Kleikamp /* 845ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 846ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 847ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 848ac27a0ecSDave Kleikamp */ 849ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 850f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 851617ba13bSMingming Cao ext4_blkdev_remove(sbi); 852ac27a0ecSDave Kleikamp } 853c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 854c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 855ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8563197ebdbSTheodore Ts'o /* 8573197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8583197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 8593197ebdbSTheodore Ts'o */ 8603197ebdbSTheodore Ts'o unlock_super(sb); 8613197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 8623197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 863705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 864ac27a0ecSDave Kleikamp kfree(sbi); 865ac27a0ecSDave Kleikamp } 866ac27a0ecSDave Kleikamp 867e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 868ac27a0ecSDave Kleikamp 869ac27a0ecSDave Kleikamp /* 870ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 871ac27a0ecSDave Kleikamp */ 872617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 873ac27a0ecSDave Kleikamp { 874617ba13bSMingming Cao struct ext4_inode_info *ei; 875ac27a0ecSDave Kleikamp 876e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 877ac27a0ecSDave Kleikamp if (!ei) 878ac27a0ecSDave Kleikamp return NULL; 8790b8e58a1SAndreas Dilger 880ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 88191246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 882a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 883c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 884c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 885d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 886d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 887d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8889d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 889d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 890a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 891a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 892a9e7f447SDmitry Monakhov #endif 8938aefcd55STheodore Ts'o ei->jinode = NULL; 894c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 895744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 8968d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 897b436b9beSJan Kara ei->i_sync_tid = 0; 898b436b9beSJan Kara ei->i_datasync_tid = 0; 899f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 900e9e3bcecSEric Sandeen atomic_set(&ei->i_aiodio_unwritten, 0); 9010b8e58a1SAndreas Dilger 902ac27a0ecSDave Kleikamp return &ei->vfs_inode; 903ac27a0ecSDave Kleikamp } 904ac27a0ecSDave Kleikamp 9057ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9067ff9c073STheodore Ts'o { 9077ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9087ff9c073STheodore Ts'o 9097ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9107ff9c073STheodore Ts'o return drop; 9117ff9c073STheodore Ts'o } 9127ff9c073STheodore Ts'o 913fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 914fa0d7e3dSNick Piggin { 915fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 916fa0d7e3dSNick Piggin INIT_LIST_HEAD(&inode->i_dentry); 917fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 918fa0d7e3dSNick Piggin } 919fa0d7e3dSNick Piggin 920617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 921ac27a0ecSDave Kleikamp { 9229f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 923b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 924b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 925b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9269f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9279f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9289f7dd93dSVasily Averin true); 9299f7dd93dSVasily Averin dump_stack(); 9309f7dd93dSVasily Averin } 931fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 932ac27a0ecSDave Kleikamp } 933ac27a0ecSDave Kleikamp 93451cc5068SAlexey Dobriyan static void init_once(void *foo) 935ac27a0ecSDave Kleikamp { 936617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 937ac27a0ecSDave Kleikamp 938ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 93903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 940ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 941ac27a0ecSDave Kleikamp #endif 9420e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 943ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 944ac27a0ecSDave Kleikamp } 945ac27a0ecSDave Kleikamp 946ac27a0ecSDave Kleikamp static int init_inodecache(void) 947ac27a0ecSDave Kleikamp { 948617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 949617ba13bSMingming Cao sizeof(struct ext4_inode_info), 950ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 951ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 95220c2df83SPaul Mundt init_once); 953617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 954ac27a0ecSDave Kleikamp return -ENOMEM; 955ac27a0ecSDave Kleikamp return 0; 956ac27a0ecSDave Kleikamp } 957ac27a0ecSDave Kleikamp 958ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 959ac27a0ecSDave Kleikamp { 960617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 961ac27a0ecSDave Kleikamp } 962ac27a0ecSDave Kleikamp 9630930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 964ac27a0ecSDave Kleikamp { 9650930fcc1SAl Viro invalidate_inode_buffers(inode); 9660930fcc1SAl Viro end_writeback(inode); 9679f754758SChristoph Hellwig dquot_drop(inode); 968c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 9698aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 9708aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 9718aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 9728aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 9738aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 9748aefcd55STheodore Ts'o } 975ac27a0ecSDave Kleikamp } 976ac27a0ecSDave Kleikamp 9772b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 9782b2d6d01STheodore Ts'o struct super_block *sb) 979ac27a0ecSDave Kleikamp { 980ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 981617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 982ac27a0ecSDave Kleikamp 9835a20bdfcSJan Kara if (sbi->s_jquota_fmt) { 9845a20bdfcSJan Kara char *fmtname = ""; 9855a20bdfcSJan Kara 9865a20bdfcSJan Kara switch (sbi->s_jquota_fmt) { 9875a20bdfcSJan Kara case QFMT_VFS_OLD: 9885a20bdfcSJan Kara fmtname = "vfsold"; 9895a20bdfcSJan Kara break; 9905a20bdfcSJan Kara case QFMT_VFS_V0: 9915a20bdfcSJan Kara fmtname = "vfsv0"; 9925a20bdfcSJan Kara break; 9935a20bdfcSJan Kara case QFMT_VFS_V1: 9945a20bdfcSJan Kara fmtname = "vfsv1"; 9955a20bdfcSJan Kara break; 9965a20bdfcSJan Kara } 9975a20bdfcSJan Kara seq_printf(seq, ",jqfmt=%s", fmtname); 9985a20bdfcSJan Kara } 999ac27a0ecSDave Kleikamp 1000ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 1001ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 1002ac27a0ecSDave Kleikamp 1003ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 1004ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 1005ac27a0ecSDave Kleikamp 1006482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA)) 1007ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 1008ac27a0ecSDave Kleikamp 1009482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA)) 1010ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 1011ac27a0ecSDave Kleikamp #endif 1012ac27a0ecSDave Kleikamp } 1013ac27a0ecSDave Kleikamp 1014d9c9bef1SMiklos Szeredi /* 1015d9c9bef1SMiklos Szeredi * Show an option if 1016d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 1017d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 1018d9c9bef1SMiklos Szeredi */ 1019617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 1020ac27a0ecSDave Kleikamp { 1021aa22df2cSAneesh Kumar K.V int def_errors; 1022aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 1023ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 1024d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 1025d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 1026d9c9bef1SMiklos Szeredi 1027d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 1028aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 1029d9c9bef1SMiklos Szeredi 1030d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 1031d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 1032d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 1033d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 1034aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 1035d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 1036d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 1037d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 1038d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 1039d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 1040d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 1041d9c9bef1SMiklos Szeredi } 1042d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 1043d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 1044d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 1045d9c9bef1SMiklos Szeredi } 1046bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 1047d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 1048bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 1049d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 1050bb4f397aSAneesh Kumar K.V } 1051bb4f397aSAneesh Kumar K.V } 1052aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 1053bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 1054aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 1055d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 1056aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 1057d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 1058aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 1059d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 1060d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 1061d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 106203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1063ea663336SEric Sandeen if (test_opt(sb, XATTR_USER)) 1064d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 1065ea663336SEric Sandeen if (!test_opt(sb, XATTR_USER)) 1066d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 1067d9c9bef1SMiklos Szeredi #endif 106803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1069aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 1070d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 1071d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 1072d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 1073d9c9bef1SMiklos Szeredi #endif 107430773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 1075d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 1076d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 1077d9c9bef1SMiklos Szeredi } 107830773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 107930773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 108030773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 108130773840STheodore Ts'o } 108230773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 108330773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 108430773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 108530773840STheodore Ts'o } 108630773840STheodore Ts'o 1087571640caSEric Sandeen /* 1088571640caSEric Sandeen * We're changing the default of barrier mount option, so 1089571640caSEric Sandeen * let's always display its mount state so it's clear what its 1090571640caSEric Sandeen * status is. 1091571640caSEric Sandeen */ 1092571640caSEric Sandeen seq_puts(seq, ",barrier="); 1093571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 1094cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 1095cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 109639a4badeSJan Kara else if (test_opt(sb, JOURNAL_CHECKSUM)) 109739a4badeSJan Kara seq_puts(seq, ",journal_checksum"); 109825ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 109925ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 11008b67f04aSTheodore Ts'o if (!test_opt(sb, DELALLOC) && 11018b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_NODELALLOC)) 1102dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 1103dd919b98SAneesh Kumar K.V 11046fd7a467STheodore Ts'o if (!test_opt(sb, MBLK_IO_SUBMIT)) 11056fd7a467STheodore Ts'o seq_puts(seq, ",nomblk_io_submit"); 1106cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 1107cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 1108aa22df2cSAneesh Kumar K.V /* 1109aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 1110aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 1111aa22df2cSAneesh Kumar K.V */ 1112617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 1113ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 1114617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 1115ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 1116617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 1117ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 1118ac27a0ecSDave Kleikamp 1119240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 1120240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 1121240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 1122240799cdSTheodore Ts'o 11235bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 11245bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 11255bf5683aSHidehiro Kawai 1126afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 112706705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 1128afd4672dSTheodore Ts'o 11298b67f04aSTheodore Ts'o if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) 11305328e635SEric Sandeen seq_puts(seq, ",discard"); 11315328e635SEric Sandeen 1132e3bb52aeSEric Sandeen if (test_opt(sb, NOLOAD)) 1133e3bb52aeSEric Sandeen seq_puts(seq, ",norecovery"); 1134e3bb52aeSEric Sandeen 1135744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) 1136744692dcSJiaying Zhang seq_puts(seq, ",dioread_nolock"); 1137744692dcSJiaying Zhang 11388b67f04aSTheodore Ts'o if (test_opt(sb, BLOCK_VALIDITY) && 11398b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) 11408b67f04aSTheodore Ts'o seq_puts(seq, ",block_validity"); 11418b67f04aSTheodore Ts'o 1142bfff6873SLukas Czerner if (!test_opt(sb, INIT_INODE_TABLE)) 1143bfff6873SLukas Czerner seq_puts(seq, ",noinit_inode_table"); 114451ce6511SLukas Czerner else if (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT) 1145bfff6873SLukas Czerner seq_printf(seq, ",init_inode_table=%u", 1146bfff6873SLukas Czerner (unsigned) sbi->s_li_wait_mult); 1147bfff6873SLukas Czerner 1148617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 11490b8e58a1SAndreas Dilger 1150ac27a0ecSDave Kleikamp return 0; 1151ac27a0ecSDave Kleikamp } 1152ac27a0ecSDave Kleikamp 11531b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 11541b961ac0SChristoph Hellwig u64 ino, u32 generation) 1155ac27a0ecSDave Kleikamp { 1156ac27a0ecSDave Kleikamp struct inode *inode; 1157ac27a0ecSDave Kleikamp 1158617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1159ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1160617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1161ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1162ac27a0ecSDave Kleikamp 1163ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1164ac27a0ecSDave Kleikamp * 1165617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1166ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1167ac27a0ecSDave Kleikamp * 1168ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1169ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1170ac27a0ecSDave Kleikamp */ 11711d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 11721d1fe1eeSDavid Howells if (IS_ERR(inode)) 11731d1fe1eeSDavid Howells return ERR_CAST(inode); 11741d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1175ac27a0ecSDave Kleikamp iput(inode); 1176ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1177ac27a0ecSDave Kleikamp } 11781b961ac0SChristoph Hellwig 11791b961ac0SChristoph Hellwig return inode; 1180ac27a0ecSDave Kleikamp } 11811b961ac0SChristoph Hellwig 11821b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 11831b961ac0SChristoph Hellwig int fh_len, int fh_type) 11841b961ac0SChristoph Hellwig { 11851b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 11861b961ac0SChristoph Hellwig ext4_nfs_get_inode); 11871b961ac0SChristoph Hellwig } 11881b961ac0SChristoph Hellwig 11891b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 11901b961ac0SChristoph Hellwig int fh_len, int fh_type) 11911b961ac0SChristoph Hellwig { 11921b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 11931b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1194ac27a0ecSDave Kleikamp } 1195ac27a0ecSDave Kleikamp 1196c39a7f84SToshiyuki Okajima /* 1197c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1198c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1199c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1200c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1201c39a7f84SToshiyuki Okajima */ 12020b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 12030b8e58a1SAndreas Dilger gfp_t wait) 1204c39a7f84SToshiyuki Okajima { 1205c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1206c39a7f84SToshiyuki Okajima 1207c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1208c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1209c39a7f84SToshiyuki Okajima return 0; 1210c39a7f84SToshiyuki Okajima if (journal) 1211c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1212c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1213c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1214c39a7f84SToshiyuki Okajima } 1215c39a7f84SToshiyuki Okajima 1216ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1217ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1218ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1219ac27a0ecSDave Kleikamp 1220617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1221617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1222617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1223617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1224617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 12256f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1226f00c9e44SJan Kara struct path *path); 1227ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1228617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1229617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1230ac27a0ecSDave Kleikamp size_t len, loff_t off); 1231617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1232ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1233ac27a0ecSDave Kleikamp 123461e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 123560e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1236617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1237617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1238617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1239617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1240a5b5ee32SJan Kara .write_info = ext4_write_info, 1241a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1242a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1243ac27a0ecSDave Kleikamp }; 1244ac27a0ecSDave Kleikamp 12450d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1246617ba13bSMingming Cao .quota_on = ext4_quota_on, 1247ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1248287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1249287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1250287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1251287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1252287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1253ac27a0ecSDave Kleikamp }; 1254ac27a0ecSDave Kleikamp #endif 1255ac27a0ecSDave Kleikamp 1256ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1257617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1258617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1259617ba13bSMingming Cao .write_inode = ext4_write_inode, 1260617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 12617ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 12620930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1263617ba13bSMingming Cao .put_super = ext4_put_super, 1264617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1265c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1266c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1267617ba13bSMingming Cao .statfs = ext4_statfs, 1268617ba13bSMingming Cao .remount_fs = ext4_remount, 1269617ba13bSMingming Cao .show_options = ext4_show_options, 1270ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1271617ba13bSMingming Cao .quota_read = ext4_quota_read, 1272617ba13bSMingming Cao .quota_write = ext4_quota_write, 1273ac27a0ecSDave Kleikamp #endif 1274c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1275ac27a0ecSDave Kleikamp }; 1276ac27a0ecSDave Kleikamp 12779ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 12789ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 12799ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 12809ca92389STheodore Ts'o .write_inode = ext4_write_inode, 12819ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 12827ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 12830930fcc1SAl Viro .evict_inode = ext4_evict_inode, 12849ca92389STheodore Ts'o .write_super = ext4_write_super, 12859ca92389STheodore Ts'o .put_super = ext4_put_super, 12869ca92389STheodore Ts'o .statfs = ext4_statfs, 12879ca92389STheodore Ts'o .remount_fs = ext4_remount, 12889ca92389STheodore Ts'o .show_options = ext4_show_options, 12899ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 12909ca92389STheodore Ts'o .quota_read = ext4_quota_read, 12919ca92389STheodore Ts'o .quota_write = ext4_quota_write, 12929ca92389STheodore Ts'o #endif 12939ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 12949ca92389STheodore Ts'o }; 12959ca92389STheodore Ts'o 129639655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 12971b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 12981b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1299617ba13bSMingming Cao .get_parent = ext4_get_parent, 1300ac27a0ecSDave Kleikamp }; 1301ac27a0ecSDave Kleikamp 1302ac27a0ecSDave Kleikamp enum { 1303ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1304ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 130501436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1306ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 130706705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 130830773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1309c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1310818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1311ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1312296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1313ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 13145a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 13155a20bdfcSJan Kara Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, 13165a20bdfcSJan Kara Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, 13171449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 13181449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 13195328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1320744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 13215328e635SEric Sandeen Opt_discard, Opt_nodiscard, 1322bfff6873SLukas Czerner Opt_init_inode_table, Opt_noinit_inode_table, 1323ac27a0ecSDave Kleikamp }; 1324ac27a0ecSDave Kleikamp 1325a447c093SSteven Whitehouse static const match_table_t tokens = { 1326ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1327ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1328ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1329ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1330ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1331ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1332ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1333ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1334ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1335ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1336ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1337ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1338ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1339ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1340ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1341ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1342ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1343ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1344ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1345ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1346ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1347e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 1348ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1349ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1350ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 135130773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 135230773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1353ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1354ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1355818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1356818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1357ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1358ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1359ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1360ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 13615bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 13625bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1363ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1364ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1365ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1366ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1367ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1368ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 13695a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1370ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1371ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1372ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1373ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1374ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 137506705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 137606705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 137725ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1378c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1379ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 138064769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1381dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 13821449032bSTheodore Ts'o {Opt_mblk_io_submit, "mblk_io_submit"}, 13831449032bSTheodore Ts'o {Opt_nomblk_io_submit, "nomblk_io_submit"}, 13846fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 13856fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1386240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1387b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1388afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 138906705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 139006705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1391744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1392744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 13935328e635SEric Sandeen {Opt_discard, "discard"}, 13945328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1395bfff6873SLukas Czerner {Opt_init_inode_table, "init_itable=%u"}, 1396bfff6873SLukas Czerner {Opt_init_inode_table, "init_itable"}, 1397bfff6873SLukas Czerner {Opt_noinit_inode_table, "noinit_itable"}, 1398f3f12faaSJosef Bacik {Opt_err, NULL}, 1399ac27a0ecSDave Kleikamp }; 1400ac27a0ecSDave Kleikamp 1401617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1402ac27a0ecSDave Kleikamp { 1403617ba13bSMingming Cao ext4_fsblk_t sb_block; 1404ac27a0ecSDave Kleikamp char *options = (char *) *data; 1405ac27a0ecSDave Kleikamp 1406ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1407ac27a0ecSDave Kleikamp return 1; /* Default location */ 14080b8e58a1SAndreas Dilger 1409ac27a0ecSDave Kleikamp options += 3; 14100b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1411ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1412ac27a0ecSDave Kleikamp if (*options && *options != ',') { 14134776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1414ac27a0ecSDave Kleikamp (char *) *data); 1415ac27a0ecSDave Kleikamp return 1; 1416ac27a0ecSDave Kleikamp } 1417ac27a0ecSDave Kleikamp if (*options == ',') 1418ac27a0ecSDave Kleikamp options++; 1419ac27a0ecSDave Kleikamp *data = (void *) options; 14200b8e58a1SAndreas Dilger 1421ac27a0ecSDave Kleikamp return sb_block; 1422ac27a0ecSDave Kleikamp } 1423ac27a0ecSDave Kleikamp 1424b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1425437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1426437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1427b3881f74STheodore Ts'o 142856c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 142956c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 143056c50f11SDmitry Monakhov { 143156c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 143256c50f11SDmitry Monakhov char *qname; 143356c50f11SDmitry Monakhov 143456c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 143556c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 143656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 143756c50f11SDmitry Monakhov "Cannot change journaled " 143856c50f11SDmitry Monakhov "quota options when quota turned on"); 143956c50f11SDmitry Monakhov return 0; 144056c50f11SDmitry Monakhov } 144156c50f11SDmitry Monakhov qname = match_strdup(args); 144256c50f11SDmitry Monakhov if (!qname) { 144356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 144456c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 144556c50f11SDmitry Monakhov return 0; 144656c50f11SDmitry Monakhov } 144756c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 144856c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 144956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 145056c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 145156c50f11SDmitry Monakhov kfree(qname); 145256c50f11SDmitry Monakhov return 0; 145356c50f11SDmitry Monakhov } 145456c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 145556c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 145656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 145756c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 145856c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 145956c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 146056c50f11SDmitry Monakhov return 0; 146156c50f11SDmitry Monakhov } 1462fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 146356c50f11SDmitry Monakhov return 1; 146456c50f11SDmitry Monakhov } 146556c50f11SDmitry Monakhov 146656c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 146756c50f11SDmitry Monakhov { 146856c50f11SDmitry Monakhov 146956c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 147056c50f11SDmitry Monakhov 147156c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 147256c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 147356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 147456c50f11SDmitry Monakhov " when quota turned on"); 147556c50f11SDmitry Monakhov return 0; 147656c50f11SDmitry Monakhov } 147756c50f11SDmitry Monakhov /* 147856c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 147956c50f11SDmitry Monakhov * to be correct 148056c50f11SDmitry Monakhov */ 148156c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 148256c50f11SDmitry Monakhov return 1; 148356c50f11SDmitry Monakhov } 148456c50f11SDmitry Monakhov #endif 148556c50f11SDmitry Monakhov 1486ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1487c3191067STheodore Ts'o unsigned long *journal_devnum, 1488b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1489617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1490ac27a0ecSDave Kleikamp { 1491617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1492ac27a0ecSDave Kleikamp char *p; 1493ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1494ac27a0ecSDave Kleikamp int data_opt = 0; 1495ac27a0ecSDave Kleikamp int option; 1496ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 149756c50f11SDmitry Monakhov int qfmt; 1498ac27a0ecSDave Kleikamp #endif 1499ac27a0ecSDave Kleikamp 1500ac27a0ecSDave Kleikamp if (!options) 1501ac27a0ecSDave Kleikamp return 1; 1502ac27a0ecSDave Kleikamp 1503ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1504ac27a0ecSDave Kleikamp int token; 1505ac27a0ecSDave Kleikamp if (!*p) 1506ac27a0ecSDave Kleikamp continue; 1507ac27a0ecSDave Kleikamp 150815121c18SEric Sandeen /* 150915121c18SEric Sandeen * Initialize args struct so we know whether arg was 151015121c18SEric Sandeen * found; some options take optional arguments. 151115121c18SEric Sandeen */ 15127dc57615SPeter Huewe args[0].to = args[0].from = NULL; 1513ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1514ac27a0ecSDave Kleikamp switch (token) { 1515ac27a0ecSDave Kleikamp case Opt_bsd_df: 1516437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1517fd8c37ecSTheodore Ts'o clear_opt(sb, MINIX_DF); 1518ac27a0ecSDave Kleikamp break; 1519ac27a0ecSDave Kleikamp case Opt_minix_df: 1520437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1521fd8c37ecSTheodore Ts'o set_opt(sb, MINIX_DF); 1522437ca0fdSDmitry Monakhov 1523ac27a0ecSDave Kleikamp break; 1524ac27a0ecSDave Kleikamp case Opt_grpid: 1525437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1526fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 1527437ca0fdSDmitry Monakhov 1528ac27a0ecSDave Kleikamp break; 1529ac27a0ecSDave Kleikamp case Opt_nogrpid: 1530437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1531fd8c37ecSTheodore Ts'o clear_opt(sb, GRPID); 1532437ca0fdSDmitry Monakhov 1533ac27a0ecSDave Kleikamp break; 1534ac27a0ecSDave Kleikamp case Opt_resuid: 1535ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1536ac27a0ecSDave Kleikamp return 0; 1537ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1538ac27a0ecSDave Kleikamp break; 1539ac27a0ecSDave Kleikamp case Opt_resgid: 1540ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1541ac27a0ecSDave Kleikamp return 0; 1542ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1543ac27a0ecSDave Kleikamp break; 1544ac27a0ecSDave Kleikamp case Opt_sb: 1545ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1546ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1547ac27a0ecSDave Kleikamp break; 1548ac27a0ecSDave Kleikamp case Opt_err_panic: 1549fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_CONT); 1550fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_RO); 1551fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 1552ac27a0ecSDave Kleikamp break; 1553ac27a0ecSDave Kleikamp case Opt_err_ro: 1554fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_CONT); 1555fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_PANIC); 1556fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 1557ac27a0ecSDave Kleikamp break; 1558ac27a0ecSDave Kleikamp case Opt_err_cont: 1559fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_RO); 1560fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_PANIC); 1561fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 1562ac27a0ecSDave Kleikamp break; 1563ac27a0ecSDave Kleikamp case Opt_nouid32: 1564fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 1565ac27a0ecSDave Kleikamp break; 1566ac27a0ecSDave Kleikamp case Opt_debug: 1567fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 1568ac27a0ecSDave Kleikamp break; 1569ac27a0ecSDave Kleikamp case Opt_oldalloc: 1570fd8c37ecSTheodore Ts'o set_opt(sb, OLDALLOC); 1571ac27a0ecSDave Kleikamp break; 1572ac27a0ecSDave Kleikamp case Opt_orlov: 1573fd8c37ecSTheodore Ts'o clear_opt(sb, OLDALLOC); 1574ac27a0ecSDave Kleikamp break; 157503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1576ac27a0ecSDave Kleikamp case Opt_user_xattr: 1577fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 1578ac27a0ecSDave Kleikamp break; 1579ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1580fd8c37ecSTheodore Ts'o clear_opt(sb, XATTR_USER); 1581ac27a0ecSDave Kleikamp break; 1582ac27a0ecSDave Kleikamp #else 1583ac27a0ecSDave Kleikamp case Opt_user_xattr: 1584ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1585b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1586ac27a0ecSDave Kleikamp break; 1587ac27a0ecSDave Kleikamp #endif 158803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1589ac27a0ecSDave Kleikamp case Opt_acl: 1590fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 1591ac27a0ecSDave Kleikamp break; 1592ac27a0ecSDave Kleikamp case Opt_noacl: 1593fd8c37ecSTheodore Ts'o clear_opt(sb, POSIX_ACL); 1594ac27a0ecSDave Kleikamp break; 1595ac27a0ecSDave Kleikamp #else 1596ac27a0ecSDave Kleikamp case Opt_acl: 1597ac27a0ecSDave Kleikamp case Opt_noacl: 1598b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1599ac27a0ecSDave Kleikamp break; 1600ac27a0ecSDave Kleikamp #endif 1601ac27a0ecSDave Kleikamp case Opt_journal_update: 1602ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1603ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1604ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1605ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1606ac27a0ecSDave Kleikamp journal file. */ 1607ac27a0ecSDave Kleikamp if (is_remount) { 1608b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1609b31e1552SEric Sandeen "Cannot specify journal on remount"); 1610ac27a0ecSDave Kleikamp return 0; 1611ac27a0ecSDave Kleikamp } 1612fd8c37ecSTheodore Ts'o set_opt(sb, UPDATE_JOURNAL); 1613ac27a0ecSDave Kleikamp break; 1614ac27a0ecSDave Kleikamp case Opt_journal_dev: 1615ac27a0ecSDave Kleikamp if (is_remount) { 1616b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1617b31e1552SEric Sandeen "Cannot specify journal on remount"); 1618ac27a0ecSDave Kleikamp return 0; 1619ac27a0ecSDave Kleikamp } 1620ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1621ac27a0ecSDave Kleikamp return 0; 1622ac27a0ecSDave Kleikamp *journal_devnum = option; 1623ac27a0ecSDave Kleikamp break; 1624818d276cSGirish Shilamkar case Opt_journal_checksum: 1625fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_CHECKSUM); 1626d4da6c9cSLinus Torvalds break; 1627818d276cSGirish Shilamkar case Opt_journal_async_commit: 1628fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_ASYNC_COMMIT); 1629fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_CHECKSUM); 1630818d276cSGirish Shilamkar break; 1631ac27a0ecSDave Kleikamp case Opt_noload: 1632fd8c37ecSTheodore Ts'o set_opt(sb, NOLOAD); 1633ac27a0ecSDave Kleikamp break; 1634ac27a0ecSDave Kleikamp case Opt_commit: 1635ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1636ac27a0ecSDave Kleikamp return 0; 1637ac27a0ecSDave Kleikamp if (option < 0) 1638ac27a0ecSDave Kleikamp return 0; 1639ac27a0ecSDave Kleikamp if (option == 0) 1640cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1641ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1642ac27a0ecSDave Kleikamp break; 164330773840STheodore Ts'o case Opt_max_batch_time: 164430773840STheodore Ts'o if (match_int(&args[0], &option)) 164530773840STheodore Ts'o return 0; 164630773840STheodore Ts'o if (option < 0) 164730773840STheodore Ts'o return 0; 164830773840STheodore Ts'o if (option == 0) 164930773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 165030773840STheodore Ts'o sbi->s_max_batch_time = option; 165130773840STheodore Ts'o break; 165230773840STheodore Ts'o case Opt_min_batch_time: 165330773840STheodore Ts'o if (match_int(&args[0], &option)) 165430773840STheodore Ts'o return 0; 165530773840STheodore Ts'o if (option < 0) 165630773840STheodore Ts'o return 0; 165730773840STheodore Ts'o sbi->s_min_batch_time = option; 165830773840STheodore Ts'o break; 1659ac27a0ecSDave Kleikamp case Opt_data_journal: 1660617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1661ac27a0ecSDave Kleikamp goto datacheck; 1662ac27a0ecSDave Kleikamp case Opt_data_ordered: 1663617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1664ac27a0ecSDave Kleikamp goto datacheck; 1665ac27a0ecSDave Kleikamp case Opt_data_writeback: 1666617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1667ac27a0ecSDave Kleikamp datacheck: 1668ac27a0ecSDave Kleikamp if (is_remount) { 1669482a7425SDmitry Monakhov if (test_opt(sb, DATA_FLAGS) != data_opt) { 1670b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1671b31e1552SEric Sandeen "Cannot change data mode on remount"); 1672ac27a0ecSDave Kleikamp return 0; 1673ac27a0ecSDave Kleikamp } 1674ac27a0ecSDave Kleikamp } else { 1675fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 1676ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1677ac27a0ecSDave Kleikamp } 1678ac27a0ecSDave Kleikamp break; 16795bf5683aSHidehiro Kawai case Opt_data_err_abort: 1680fd8c37ecSTheodore Ts'o set_opt(sb, DATA_ERR_ABORT); 16815bf5683aSHidehiro Kawai break; 16825bf5683aSHidehiro Kawai case Opt_data_err_ignore: 1683fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_ERR_ABORT); 16845bf5683aSHidehiro Kawai break; 1685ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1686ac27a0ecSDave Kleikamp case Opt_usrjquota: 168756c50f11SDmitry Monakhov if (!set_qf_name(sb, USRQUOTA, &args[0])) 168856c50f11SDmitry Monakhov return 0; 168956c50f11SDmitry Monakhov break; 1690ac27a0ecSDave Kleikamp case Opt_grpjquota: 169156c50f11SDmitry Monakhov if (!set_qf_name(sb, GRPQUOTA, &args[0])) 1692ac27a0ecSDave Kleikamp return 0; 1693ac27a0ecSDave Kleikamp break; 1694ac27a0ecSDave Kleikamp case Opt_offusrjquota: 169556c50f11SDmitry Monakhov if (!clear_qf_name(sb, USRQUOTA)) 1696ac27a0ecSDave Kleikamp return 0; 1697ac27a0ecSDave Kleikamp break; 169856c50f11SDmitry Monakhov case Opt_offgrpjquota: 169956c50f11SDmitry Monakhov if (!clear_qf_name(sb, GRPQUOTA)) 170056c50f11SDmitry Monakhov return 0; 170156c50f11SDmitry Monakhov break; 170256c50f11SDmitry Monakhov 1703ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1704dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1705dfc5d03fSJan Kara goto set_qf_format; 1706ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1707dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 17085a20bdfcSJan Kara goto set_qf_format; 17095a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 17105a20bdfcSJan Kara qfmt = QFMT_VFS_V1; 1711dfc5d03fSJan Kara set_qf_format: 171217bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1713dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1714b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1715dfc5d03fSJan Kara "journaled quota options when " 1716b31e1552SEric Sandeen "quota turned on"); 1717dfc5d03fSJan Kara return 0; 1718dfc5d03fSJan Kara } 1719dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1720ac27a0ecSDave Kleikamp break; 1721ac27a0ecSDave Kleikamp case Opt_quota: 1722ac27a0ecSDave Kleikamp case Opt_usrquota: 1723fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 1724fd8c37ecSTheodore Ts'o set_opt(sb, USRQUOTA); 1725ac27a0ecSDave Kleikamp break; 1726ac27a0ecSDave Kleikamp case Opt_grpquota: 1727fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 1728fd8c37ecSTheodore Ts'o set_opt(sb, GRPQUOTA); 1729ac27a0ecSDave Kleikamp break; 1730ac27a0ecSDave Kleikamp case Opt_noquota: 173117bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1732b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1733b31e1552SEric Sandeen "options when quota turned on"); 1734ac27a0ecSDave Kleikamp return 0; 1735ac27a0ecSDave Kleikamp } 1736fd8c37ecSTheodore Ts'o clear_opt(sb, QUOTA); 1737fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1738fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1739ac27a0ecSDave Kleikamp break; 1740ac27a0ecSDave Kleikamp #else 1741ac27a0ecSDave Kleikamp case Opt_quota: 1742ac27a0ecSDave Kleikamp case Opt_usrquota: 1743ac27a0ecSDave Kleikamp case Opt_grpquota: 1744b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1745b31e1552SEric Sandeen "quota options not supported"); 1746cd59e7b9SJan Kara break; 1747ac27a0ecSDave Kleikamp case Opt_usrjquota: 1748ac27a0ecSDave Kleikamp case Opt_grpjquota: 1749ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1750ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1751ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1752ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 17535a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 1754b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1755b31e1552SEric Sandeen "journaled quota options not supported"); 1756ac27a0ecSDave Kleikamp break; 1757ac27a0ecSDave Kleikamp case Opt_noquota: 1758ac27a0ecSDave Kleikamp break; 1759ac27a0ecSDave Kleikamp #endif 1760ac27a0ecSDave Kleikamp case Opt_abort: 17614ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1762ac27a0ecSDave Kleikamp break; 176306705bffSTheodore Ts'o case Opt_nobarrier: 1764fd8c37ecSTheodore Ts'o clear_opt(sb, BARRIER); 176506705bffSTheodore Ts'o break; 1766ac27a0ecSDave Kleikamp case Opt_barrier: 176715121c18SEric Sandeen if (args[0].from) { 176815121c18SEric Sandeen if (match_int(&args[0], &option)) 176915121c18SEric Sandeen return 0; 177015121c18SEric Sandeen } else 177115121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1772ac27a0ecSDave Kleikamp if (option) 1773fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 1774ac27a0ecSDave Kleikamp else 1775fd8c37ecSTheodore Ts'o clear_opt(sb, BARRIER); 1776ac27a0ecSDave Kleikamp break; 1777ac27a0ecSDave Kleikamp case Opt_ignore: 1778ac27a0ecSDave Kleikamp break; 1779ac27a0ecSDave Kleikamp case Opt_resize: 1780ac27a0ecSDave Kleikamp if (!is_remount) { 1781b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1782b31e1552SEric Sandeen "resize option only available " 1783b31e1552SEric Sandeen "for remount"); 1784ac27a0ecSDave Kleikamp return 0; 1785ac27a0ecSDave Kleikamp } 1786ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1787ac27a0ecSDave Kleikamp return 0; 1788ac27a0ecSDave Kleikamp *n_blocks_count = option; 1789ac27a0ecSDave Kleikamp break; 1790ac27a0ecSDave Kleikamp case Opt_nobh: 1791206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1792206f7ab4SChristoph Hellwig "Ignoring deprecated nobh option"); 1793ac27a0ecSDave Kleikamp break; 1794ac27a0ecSDave Kleikamp case Opt_bh: 1795206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1796206f7ab4SChristoph Hellwig "Ignoring deprecated bh option"); 1797ac27a0ecSDave Kleikamp break; 179825ec56b5SJean Noel Cordenner case Opt_i_version: 1799fd8c37ecSTheodore Ts'o set_opt(sb, I_VERSION); 180025ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 180125ec56b5SJean Noel Cordenner break; 1802dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1803fd8c37ecSTheodore Ts'o clear_opt(sb, DELALLOC); 1804*56889787STheodore Ts'o clear_opt2(sb, EXPLICIT_DELALLOC); 1805dd919b98SAneesh Kumar K.V break; 18061449032bSTheodore Ts'o case Opt_mblk_io_submit: 1807fd8c37ecSTheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 18081449032bSTheodore Ts'o break; 18091449032bSTheodore Ts'o case Opt_nomblk_io_submit: 1810fd8c37ecSTheodore Ts'o clear_opt(sb, MBLK_IO_SUBMIT); 18111449032bSTheodore Ts'o break; 1812c9de560dSAlex Tomas case Opt_stripe: 1813c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1814c9de560dSAlex Tomas return 0; 1815c9de560dSAlex Tomas if (option < 0) 1816c9de560dSAlex Tomas return 0; 1817c9de560dSAlex Tomas sbi->s_stripe = option; 1818c9de560dSAlex Tomas break; 181964769240SAlex Tomas case Opt_delalloc: 1820fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 1821*56889787STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 182264769240SAlex Tomas break; 18236fd058f7STheodore Ts'o case Opt_block_validity: 1824fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 18256fd058f7STheodore Ts'o break; 18266fd058f7STheodore Ts'o case Opt_noblock_validity: 1827fd8c37ecSTheodore Ts'o clear_opt(sb, BLOCK_VALIDITY); 18286fd058f7STheodore Ts'o break; 1829240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1830240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1831240799cdSTheodore Ts'o return 0; 1832240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1833240799cdSTheodore Ts'o return 0; 18345dbd571dSAlexander V. Lukyanov if (option && !is_power_of_2(option)) { 1835b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1836b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1837b31e1552SEric Sandeen " must be a power of 2"); 18383197ebdbSTheodore Ts'o return 0; 18393197ebdbSTheodore Ts'o } 1840240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1841240799cdSTheodore Ts'o break; 1842b3881f74STheodore Ts'o case Opt_journal_ioprio: 1843b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1844b3881f74STheodore Ts'o return 0; 1845b3881f74STheodore Ts'o if (option < 0 || option > 7) 1846b3881f74STheodore Ts'o break; 1847b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1848b3881f74STheodore Ts'o option); 1849b3881f74STheodore Ts'o break; 185006705bffSTheodore Ts'o case Opt_noauto_da_alloc: 1851fd8c37ecSTheodore Ts'o set_opt(sb, NO_AUTO_DA_ALLOC); 185206705bffSTheodore Ts'o break; 1853afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 185415121c18SEric Sandeen if (args[0].from) { 185515121c18SEric Sandeen if (match_int(&args[0], &option)) 185615121c18SEric Sandeen return 0; 185715121c18SEric Sandeen } else 185815121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1859afd4672dSTheodore Ts'o if (option) 1860fd8c37ecSTheodore Ts'o clear_opt(sb, NO_AUTO_DA_ALLOC); 1861afd4672dSTheodore Ts'o else 1862fd8c37ecSTheodore Ts'o set_opt(sb,NO_AUTO_DA_ALLOC); 1863afd4672dSTheodore Ts'o break; 18645328e635SEric Sandeen case Opt_discard: 1865fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 18665328e635SEric Sandeen break; 18675328e635SEric Sandeen case Opt_nodiscard: 1868fd8c37ecSTheodore Ts'o clear_opt(sb, DISCARD); 18695328e635SEric Sandeen break; 1870744692dcSJiaying Zhang case Opt_dioread_nolock: 1871fd8c37ecSTheodore Ts'o set_opt(sb, DIOREAD_NOLOCK); 1872744692dcSJiaying Zhang break; 1873744692dcSJiaying Zhang case Opt_dioread_lock: 1874fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 1875744692dcSJiaying Zhang break; 1876bfff6873SLukas Czerner case Opt_init_inode_table: 1877fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 1878bfff6873SLukas Czerner if (args[0].from) { 1879bfff6873SLukas Czerner if (match_int(&args[0], &option)) 1880bfff6873SLukas Czerner return 0; 1881bfff6873SLukas Czerner } else 1882bfff6873SLukas Czerner option = EXT4_DEF_LI_WAIT_MULT; 1883bfff6873SLukas Czerner if (option < 0) 1884bfff6873SLukas Czerner return 0; 1885bfff6873SLukas Czerner sbi->s_li_wait_mult = option; 1886bfff6873SLukas Czerner break; 1887bfff6873SLukas Czerner case Opt_noinit_inode_table: 1888fd8c37ecSTheodore Ts'o clear_opt(sb, INIT_INODE_TABLE); 1889bfff6873SLukas Czerner break; 1890ac27a0ecSDave Kleikamp default: 1891b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1892b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1893b31e1552SEric Sandeen "or missing value", p); 1894ac27a0ecSDave Kleikamp return 0; 1895ac27a0ecSDave Kleikamp } 1896ac27a0ecSDave Kleikamp } 1897ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1898ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1899482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1900fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1901ac27a0ecSDave Kleikamp 1902482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1903fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1904ac27a0ecSDave Kleikamp 190556c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1906b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1907b31e1552SEric Sandeen "format mixing"); 1908ac27a0ecSDave Kleikamp return 0; 1909ac27a0ecSDave Kleikamp } 1910ac27a0ecSDave Kleikamp 1911ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1912b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1913b31e1552SEric Sandeen "not specified"); 1914ac27a0ecSDave Kleikamp return 0; 1915ac27a0ecSDave Kleikamp } 1916ac27a0ecSDave Kleikamp } else { 1917ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1918b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 19192c8be6b2SJan Kara "specified with no journaling " 1920b31e1552SEric Sandeen "enabled"); 1921ac27a0ecSDave Kleikamp return 0; 1922ac27a0ecSDave Kleikamp } 1923ac27a0ecSDave Kleikamp } 1924ac27a0ecSDave Kleikamp #endif 1925ac27a0ecSDave Kleikamp return 1; 1926ac27a0ecSDave Kleikamp } 1927ac27a0ecSDave Kleikamp 1928617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1929ac27a0ecSDave Kleikamp int read_only) 1930ac27a0ecSDave Kleikamp { 1931617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1932ac27a0ecSDave Kleikamp int res = 0; 1933ac27a0ecSDave Kleikamp 1934617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1935b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1936b31e1552SEric Sandeen "forcing read-only mode"); 1937ac27a0ecSDave Kleikamp res = MS_RDONLY; 1938ac27a0ecSDave Kleikamp } 1939ac27a0ecSDave Kleikamp if (read_only) 1940ac27a0ecSDave Kleikamp return res; 1941617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1942b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1943b31e1552SEric Sandeen "running e2fsck is recommended"); 1944617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1945b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1946b31e1552SEric Sandeen "warning: mounting fs with errors, " 1947b31e1552SEric Sandeen "running e2fsck is recommended"); 1948ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1949ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1950ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1951b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1952b31e1552SEric Sandeen "warning: maximal mount count reached, " 1953b31e1552SEric Sandeen "running e2fsck is recommended"); 1954ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1955ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1956ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1957b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1958b31e1552SEric Sandeen "warning: checktime reached, " 1959b31e1552SEric Sandeen "running e2fsck is recommended"); 19600390131bSFrank Mayhar if (!sbi->s_journal) 1961216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1962ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1963617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1964e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1965ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1966617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19670390131bSFrank Mayhar if (sbi->s_journal) 1968617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1969ac27a0ecSDave Kleikamp 1970e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1971ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1972a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1973a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1974ac27a0ecSDave Kleikamp sb->s_blocksize, 1975ac27a0ecSDave Kleikamp sbi->s_groups_count, 1976617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1977617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1978a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1979ac27a0ecSDave Kleikamp 19807abc52c2SDan Magenheimer cleancache_init_fs(sb); 1981ac27a0ecSDave Kleikamp return res; 1982ac27a0ecSDave Kleikamp } 1983ac27a0ecSDave Kleikamp 1984772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1985772cb7c8SJose R. Santos { 1986772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1987772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1988772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1989772cb7c8SJose R. Santos ext4_group_t flex_group; 1990772cb7c8SJose R. Santos int groups_per_flex = 0; 1991c5ca7c76STheodore Ts'o size_t size; 1992772cb7c8SJose R. Santos int i; 1993772cb7c8SJose R. Santos 1994503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1995503358aeSTheodore Ts'o groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1996503358aeSTheodore Ts'o 1997503358aeSTheodore Ts'o if (groups_per_flex < 2) { 1998772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1999772cb7c8SJose R. Santos return 1; 2000772cb7c8SJose R. Santos } 2001772cb7c8SJose R. Santos 2002c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 2003c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 2004d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 2005d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 2006c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 20079933fc0aSTheodore Ts'o sbi->s_flex_groups = ext4_kvzalloc(size, GFP_KERNEL); 2008c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 20099933fc0aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %u flex groups", 201094de56abSJoe Perches flex_group_count); 2011772cb7c8SJose R. Santos goto failed; 2012772cb7c8SJose R. Santos } 2013772cb7c8SJose R. Santos 2014772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 201588b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2016772cb7c8SJose R. Santos 2017772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 20187ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 20197ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 20207ad9bb65STheodore Ts'o atomic_add(ext4_free_blks_count(sb, gdp), 20217ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_blocks); 20227ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 20237ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2024772cb7c8SJose R. Santos } 2025772cb7c8SJose R. Santos 2026772cb7c8SJose R. Santos return 1; 2027772cb7c8SJose R. Santos failed: 2028772cb7c8SJose R. Santos return 0; 2029772cb7c8SJose R. Santos } 2030772cb7c8SJose R. Santos 2031717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 2032717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2033717d50e4SAndreas Dilger { 2034717d50e4SAndreas Dilger __u16 crc = 0; 2035717d50e4SAndreas Dilger 2036717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 2037717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 2038717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 2039717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2040717d50e4SAndreas Dilger 2041717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2042717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2043717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2044717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2045717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2046717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2047717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2048717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2049717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2050717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2051717d50e4SAndreas Dilger offset); 2052717d50e4SAndreas Dilger } 2053717d50e4SAndreas Dilger 2054717d50e4SAndreas Dilger return cpu_to_le16(crc); 2055717d50e4SAndreas Dilger } 2056717d50e4SAndreas Dilger 2057717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 2058717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2059717d50e4SAndreas Dilger { 2060717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 2061717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 2062717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 2063717d50e4SAndreas Dilger return 0; 2064717d50e4SAndreas Dilger 2065717d50e4SAndreas Dilger return 1; 2066717d50e4SAndreas Dilger } 2067717d50e4SAndreas Dilger 2068ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2069bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2070bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2071ac27a0ecSDave Kleikamp { 2072617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2073617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2074617ba13bSMingming Cao ext4_fsblk_t last_block; 2075bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2076bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2077bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2078ce421581SJose R. Santos int flexbg_flag = 0; 2079bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2080ac27a0ecSDave Kleikamp 2081ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2082ce421581SJose R. Santos flexbg_flag = 1; 2083ce421581SJose R. Santos 2084617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2085ac27a0ecSDave Kleikamp 2086197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2087197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2088197cd65aSAkinobu Mita 2089ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2090bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2091ac27a0ecSDave Kleikamp else 2092ac27a0ecSDave Kleikamp last_block = first_block + 2093617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2094ac27a0ecSDave Kleikamp 2095bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2096bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2097bfff6873SLukas Czerner grp = i; 2098bfff6873SLukas Czerner 20998fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 21002b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2101b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2102a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2103b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2104ac27a0ecSDave Kleikamp return 0; 2105ac27a0ecSDave Kleikamp } 21068fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 21072b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2108b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2109a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2110b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2111ac27a0ecSDave Kleikamp return 0; 2112ac27a0ecSDave Kleikamp } 21138fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2114bd81d8eeSLaurent Vivier if (inode_table < first_block || 21152b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2116b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2117a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2118b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2119ac27a0ecSDave Kleikamp return 0; 2120ac27a0ecSDave Kleikamp } 2121955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2122717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 2123b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2124b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2125fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2126fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21277ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2128955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2129717d50e4SAndreas Dilger return 0; 2130717d50e4SAndreas Dilger } 21317ee1ec4cSLi Zefan } 2132955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2133ce421581SJose R. Santos if (!flexbg_flag) 2134617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2135ac27a0ecSDave Kleikamp } 2136bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2137bfff6873SLukas Czerner *first_not_zeroed = grp; 2138ac27a0ecSDave Kleikamp 2139bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 2140617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2141ac27a0ecSDave Kleikamp return 1; 2142ac27a0ecSDave Kleikamp } 2143ac27a0ecSDave Kleikamp 2144617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2145ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2146ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2147ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2148ac27a0ecSDave Kleikamp * 2149ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2150ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2151ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2152ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2153ac27a0ecSDave Kleikamp * 2154ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2155ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2156ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2157617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2158ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2159ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2160ac27a0ecSDave Kleikamp */ 2161617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2162617ba13bSMingming Cao struct ext4_super_block *es) 2163ac27a0ecSDave Kleikamp { 2164ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2165ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2166ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2167ac27a0ecSDave Kleikamp int i; 2168ac27a0ecSDave Kleikamp #endif 2169ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2170ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2171ac27a0ecSDave Kleikamp return; 2172ac27a0ecSDave Kleikamp } 2173ac27a0ecSDave Kleikamp 2174a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2175b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2176b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2177a8f48a95SEric Sandeen return; 2178a8f48a95SEric Sandeen } 2179a8f48a95SEric Sandeen 2180d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2181d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2182d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2183d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2184d39195c3SAmir Goldstein return; 2185d39195c3SAmir Goldstein } 2186d39195c3SAmir Goldstein 2187617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2188ac27a0ecSDave Kleikamp if (es->s_last_orphan) 2189ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2190ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2191ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2192ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2193ac27a0ecSDave Kleikamp return; 2194ac27a0ecSDave Kleikamp } 2195ac27a0ecSDave Kleikamp 2196ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2197b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2198ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2199ac27a0ecSDave Kleikamp } 2200ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2201ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2202ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2203ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2204ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2205617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2206617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2207ac27a0ecSDave Kleikamp if (ret < 0) 2208b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2209b31e1552SEric Sandeen "Cannot turn on journaled " 2210b31e1552SEric Sandeen "quota: error %d", ret); 2211ac27a0ecSDave Kleikamp } 2212ac27a0ecSDave Kleikamp } 2213ac27a0ecSDave Kleikamp #endif 2214ac27a0ecSDave Kleikamp 2215ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2216ac27a0ecSDave Kleikamp struct inode *inode; 2217ac27a0ecSDave Kleikamp 221897bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 221997bd42b9SJosef Bacik if (IS_ERR(inode)) { 2220ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2221ac27a0ecSDave Kleikamp break; 2222ac27a0ecSDave Kleikamp } 2223ac27a0ecSDave Kleikamp 2224617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2225871a2931SChristoph Hellwig dquot_initialize(inode); 2226ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2227b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2228b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 222946e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2230e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2231ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2232617ba13bSMingming Cao ext4_truncate(inode); 2233ac27a0ecSDave Kleikamp nr_truncates++; 2234ac27a0ecSDave Kleikamp } else { 2235b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2236b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 223746e665e9SHarvey Harrison __func__, inode->i_ino); 2238ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2239ac27a0ecSDave Kleikamp inode->i_ino); 2240ac27a0ecSDave Kleikamp nr_orphans++; 2241ac27a0ecSDave Kleikamp } 2242ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2243ac27a0ecSDave Kleikamp } 2244ac27a0ecSDave Kleikamp 2245ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2246ac27a0ecSDave Kleikamp 2247ac27a0ecSDave Kleikamp if (nr_orphans) 2248b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2249b31e1552SEric Sandeen PLURAL(nr_orphans)); 2250ac27a0ecSDave Kleikamp if (nr_truncates) 2251b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2252b31e1552SEric Sandeen PLURAL(nr_truncates)); 2253ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2254ac27a0ecSDave Kleikamp /* Turn quotas off */ 2255ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2256ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2257287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2258ac27a0ecSDave Kleikamp } 2259ac27a0ecSDave Kleikamp #endif 2260ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2261ac27a0ecSDave Kleikamp } 22620b8e58a1SAndreas Dilger 2263cd2291a4SEric Sandeen /* 2264cd2291a4SEric Sandeen * Maximal extent format file size. 2265cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2266cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2267cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2268cd2291a4SEric Sandeen * so that won't be a limiting factor. 2269cd2291a4SEric Sandeen * 2270f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2271f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2272f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2273f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2274f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2275f17722f9SLukas Czerner * 2276cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2277cd2291a4SEric Sandeen */ 2278f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2279cd2291a4SEric Sandeen { 2280cd2291a4SEric Sandeen loff_t res; 2281cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2282cd2291a4SEric Sandeen 2283cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2284f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2285cd2291a4SEric Sandeen /* 228690c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2287cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2288cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2289cd2291a4SEric Sandeen */ 2290cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2291cd2291a4SEric Sandeen 2292cd2291a4SEric Sandeen /* total blocks in file system block size */ 2293cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2294cd2291a4SEric Sandeen upper_limit <<= blkbits; 2295cd2291a4SEric Sandeen } 2296cd2291a4SEric Sandeen 2297f17722f9SLukas Czerner /* 2298f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2299f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2300f17722f9SLukas Czerner * size 2301f17722f9SLukas Czerner */ 2302f17722f9SLukas Czerner res = (1LL << 32) - 1; 2303cd2291a4SEric Sandeen res <<= blkbits; 2304cd2291a4SEric Sandeen 2305cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2306cd2291a4SEric Sandeen if (res > upper_limit) 2307cd2291a4SEric Sandeen res = upper_limit; 2308cd2291a4SEric Sandeen 2309cd2291a4SEric Sandeen return res; 2310cd2291a4SEric Sandeen } 2311ac27a0ecSDave Kleikamp 2312ac27a0ecSDave Kleikamp /* 2313cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 23140fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 23150fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2316ac27a0ecSDave Kleikamp */ 2317f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2318ac27a0ecSDave Kleikamp { 2319617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 23200fc1b451SAneesh Kumar K.V int meta_blocks; 23210fc1b451SAneesh Kumar K.V loff_t upper_limit; 23220b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 23230b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23240b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23250b8e58a1SAndreas Dilger * 23260b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23270b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23280fc1b451SAneesh Kumar K.V */ 23290fc1b451SAneesh Kumar K.V 2330f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23310fc1b451SAneesh Kumar K.V /* 233290c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23330b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23340b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23350fc1b451SAneesh Kumar K.V */ 23360fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23370fc1b451SAneesh Kumar K.V 23380fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23390fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23400fc1b451SAneesh Kumar K.V 23410fc1b451SAneesh Kumar K.V } else { 23428180a562SAneesh Kumar K.V /* 23438180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23448180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23458180a562SAneesh Kumar K.V * represent total number of blocks in 23468180a562SAneesh Kumar K.V * file system block size 23478180a562SAneesh Kumar K.V */ 23480fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23490fc1b451SAneesh Kumar K.V 23500fc1b451SAneesh Kumar K.V } 23510fc1b451SAneesh Kumar K.V 23520fc1b451SAneesh Kumar K.V /* indirect blocks */ 23530fc1b451SAneesh Kumar K.V meta_blocks = 1; 23540fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23550fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23560fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23570fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23580fc1b451SAneesh Kumar K.V 23590fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23600fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2361ac27a0ecSDave Kleikamp 2362ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2363ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2364ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2365ac27a0ecSDave Kleikamp res <<= bits; 2366ac27a0ecSDave Kleikamp if (res > upper_limit) 2367ac27a0ecSDave Kleikamp res = upper_limit; 23680fc1b451SAneesh Kumar K.V 23690fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23700fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23710fc1b451SAneesh Kumar K.V 2372ac27a0ecSDave Kleikamp return res; 2373ac27a0ecSDave Kleikamp } 2374ac27a0ecSDave Kleikamp 2375617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 237670bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2377ac27a0ecSDave Kleikamp { 2378617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2379fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2380ac27a0ecSDave Kleikamp int has_super = 0; 2381ac27a0ecSDave Kleikamp 2382ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2383ac27a0ecSDave Kleikamp 2384617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2385ac27a0ecSDave Kleikamp nr < first_meta_bg) 238670bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2387ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2388617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2389ac27a0ecSDave Kleikamp has_super = 1; 23900b8e58a1SAndreas Dilger 2391617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2392ac27a0ecSDave Kleikamp } 2393ac27a0ecSDave Kleikamp 2394c9de560dSAlex Tomas /** 2395c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2396c9de560dSAlex Tomas * @sbi: In memory super block info 2397c9de560dSAlex Tomas * 2398c9de560dSAlex Tomas * If we have specified it via mount option, then 2399c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2400c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2401c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2402c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2403c9de560dSAlex Tomas * 2404c9de560dSAlex Tomas */ 2405c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2406c9de560dSAlex Tomas { 2407c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2408c9de560dSAlex Tomas unsigned long stripe_width = 2409c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 24103eb08658SDan Ehrenberg int ret; 2411c9de560dSAlex Tomas 2412c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 24133eb08658SDan Ehrenberg ret = sbi->s_stripe; 24143eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24153eb08658SDan Ehrenberg ret = stripe_width; 24163eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24173eb08658SDan Ehrenberg ret = stride; 24183eb08658SDan Ehrenberg else 24193eb08658SDan Ehrenberg ret = 0; 2420c9de560dSAlex Tomas 24213eb08658SDan Ehrenberg /* 24223eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24233eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24243eb08658SDan Ehrenberg */ 24253eb08658SDan Ehrenberg if (ret <= 1) 24263eb08658SDan Ehrenberg ret = 0; 2427c9de560dSAlex Tomas 24283eb08658SDan Ehrenberg return ret; 2429c9de560dSAlex Tomas } 2430ac27a0ecSDave Kleikamp 24313197ebdbSTheodore Ts'o /* sysfs supprt */ 24323197ebdbSTheodore Ts'o 24333197ebdbSTheodore Ts'o struct ext4_attr { 24343197ebdbSTheodore Ts'o struct attribute attr; 24353197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24363197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24373197ebdbSTheodore Ts'o const char *, size_t); 24383197ebdbSTheodore Ts'o int offset; 24393197ebdbSTheodore Ts'o }; 24403197ebdbSTheodore Ts'o 24413197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 24423197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 24433197ebdbSTheodore Ts'o { 24443197ebdbSTheodore Ts'o char *endp; 24453197ebdbSTheodore Ts'o 2446e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2447e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 24483197ebdbSTheodore Ts'o if (*endp || *value > max) 24493197ebdbSTheodore Ts'o return -EINVAL; 24503197ebdbSTheodore Ts'o 24513197ebdbSTheodore Ts'o return 0; 24523197ebdbSTheodore Ts'o } 24533197ebdbSTheodore Ts'o 24543197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24553197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24563197ebdbSTheodore Ts'o char *buf) 24573197ebdbSTheodore Ts'o { 24583197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24593197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 24603197ebdbSTheodore Ts'o } 24613197ebdbSTheodore Ts'o 24623197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24633197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24643197ebdbSTheodore Ts'o { 24653197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24663197ebdbSTheodore Ts'o 2467f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2468f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24693197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24703197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24713197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24723197ebdbSTheodore Ts'o } 24733197ebdbSTheodore Ts'o 24743197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24753197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24763197ebdbSTheodore Ts'o { 24773197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24783197ebdbSTheodore Ts'o 2479f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2480f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24813197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2482a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24833197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2484a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24853197ebdbSTheodore Ts'o } 24863197ebdbSTheodore Ts'o 248777f4135fSVivek Haldar static ssize_t extent_cache_hits_show(struct ext4_attr *a, 248877f4135fSVivek Haldar struct ext4_sb_info *sbi, char *buf) 248977f4135fSVivek Haldar { 249077f4135fSVivek Haldar return snprintf(buf, PAGE_SIZE, "%lu\n", sbi->extent_cache_hits); 249177f4135fSVivek Haldar } 249277f4135fSVivek Haldar 249377f4135fSVivek Haldar static ssize_t extent_cache_misses_show(struct ext4_attr *a, 249477f4135fSVivek Haldar struct ext4_sb_info *sbi, char *buf) 249577f4135fSVivek Haldar { 249677f4135fSVivek Haldar return snprintf(buf, PAGE_SIZE, "%lu\n", sbi->extent_cache_misses); 249777f4135fSVivek Haldar } 249877f4135fSVivek Haldar 24993197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 25003197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25013197ebdbSTheodore Ts'o const char *buf, size_t count) 25023197ebdbSTheodore Ts'o { 25033197ebdbSTheodore Ts'o unsigned long t; 25043197ebdbSTheodore Ts'o 25053197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 25063197ebdbSTheodore Ts'o return -EINVAL; 25073197ebdbSTheodore Ts'o 25085dbd571dSAlexander V. Lukyanov if (t && !is_power_of_2(t)) 25093197ebdbSTheodore Ts'o return -EINVAL; 25103197ebdbSTheodore Ts'o 25113197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 25123197ebdbSTheodore Ts'o return count; 25133197ebdbSTheodore Ts'o } 25143197ebdbSTheodore Ts'o 25153197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 25163197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 25173197ebdbSTheodore Ts'o { 25183197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 25193197ebdbSTheodore Ts'o 25203197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 25213197ebdbSTheodore Ts'o } 25223197ebdbSTheodore Ts'o 25233197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 25243197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25253197ebdbSTheodore Ts'o const char *buf, size_t count) 25263197ebdbSTheodore Ts'o { 25273197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 25283197ebdbSTheodore Ts'o unsigned long t; 25293197ebdbSTheodore Ts'o 25303197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 25313197ebdbSTheodore Ts'o return -EINVAL; 25323197ebdbSTheodore Ts'o *ui = t; 25333197ebdbSTheodore Ts'o return count; 25343197ebdbSTheodore Ts'o } 25353197ebdbSTheodore Ts'o 25363197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 25373197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 25383197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 25393197ebdbSTheodore Ts'o .show = _show, \ 25403197ebdbSTheodore Ts'o .store = _store, \ 25413197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 25423197ebdbSTheodore Ts'o } 25433197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 25443197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 25453197ebdbSTheodore Ts'o 2546857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 25473197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 25483197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 25493197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 25503197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 25513197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 25523197ebdbSTheodore Ts'o 25533197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 25543197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 25553197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 255677f4135fSVivek Haldar EXT4_RO_ATTR(extent_cache_hits); 255777f4135fSVivek Haldar EXT4_RO_ATTR(extent_cache_misses); 25583197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 25593197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 256011013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 25613197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 25623197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 25633197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 25643197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 25653197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 25663197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 256755138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 25683197ebdbSTheodore Ts'o 25693197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 25703197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 25713197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 25723197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 257377f4135fSVivek Haldar ATTR_LIST(extent_cache_hits), 257477f4135fSVivek Haldar ATTR_LIST(extent_cache_misses), 25753197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 257611013911SAndreas Dilger ATTR_LIST(inode_goal), 25773197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 25783197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 25793197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 25803197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 25813197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 25823197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 258355138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 25843197ebdbSTheodore Ts'o NULL, 25853197ebdbSTheodore Ts'o }; 25863197ebdbSTheodore Ts'o 2587857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2588857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 258927ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 2590857ac889SLukas Czerner 2591857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2592857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 259327ee40dfSLukas Czerner ATTR_LIST(batched_discard), 2594857ac889SLukas Czerner NULL, 2595857ac889SLukas Czerner }; 2596857ac889SLukas Czerner 25973197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 25983197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 25993197ebdbSTheodore Ts'o { 26003197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26013197ebdbSTheodore Ts'o s_kobj); 26023197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26033197ebdbSTheodore Ts'o 26043197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 26053197ebdbSTheodore Ts'o } 26063197ebdbSTheodore Ts'o 26073197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 26083197ebdbSTheodore Ts'o struct attribute *attr, 26093197ebdbSTheodore Ts'o const char *buf, size_t len) 26103197ebdbSTheodore Ts'o { 26113197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26123197ebdbSTheodore Ts'o s_kobj); 26133197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26143197ebdbSTheodore Ts'o 26153197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 26163197ebdbSTheodore Ts'o } 26173197ebdbSTheodore Ts'o 26183197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 26193197ebdbSTheodore Ts'o { 26203197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26213197ebdbSTheodore Ts'o s_kobj); 26223197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 26233197ebdbSTheodore Ts'o } 26243197ebdbSTheodore Ts'o 262552cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 26263197ebdbSTheodore Ts'o .show = ext4_attr_show, 26273197ebdbSTheodore Ts'o .store = ext4_attr_store, 26283197ebdbSTheodore Ts'o }; 26293197ebdbSTheodore Ts'o 26303197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 26313197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 26323197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 26333197ebdbSTheodore Ts'o .release = ext4_sb_release, 26343197ebdbSTheodore Ts'o }; 26353197ebdbSTheodore Ts'o 2636857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2637857ac889SLukas Czerner { 2638857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2639857ac889SLukas Czerner } 2640857ac889SLukas Czerner 2641857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2642857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2643857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2644857ac889SLukas Czerner .release = ext4_feat_release, 2645857ac889SLukas Czerner }; 2646857ac889SLukas Czerner 2647a13fb1a4SEric Sandeen /* 2648a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2649a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2650a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2651a13fb1a4SEric Sandeen * 0 if it cannot be. 2652a13fb1a4SEric Sandeen */ 2653a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2654a13fb1a4SEric Sandeen { 2655a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2656a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2657a13fb1a4SEric Sandeen "Couldn't mount because of " 2658a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2659a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2660a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2661a13fb1a4SEric Sandeen return 0; 2662a13fb1a4SEric Sandeen } 2663a13fb1a4SEric Sandeen 2664a13fb1a4SEric Sandeen if (readonly) 2665a13fb1a4SEric Sandeen return 1; 2666a13fb1a4SEric Sandeen 2667a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2668a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2669a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2670a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2671a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2672a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2673a13fb1a4SEric Sandeen return 0; 2674a13fb1a4SEric Sandeen } 2675a13fb1a4SEric Sandeen /* 2676a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2677a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2678a13fb1a4SEric Sandeen */ 2679a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2680a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2681a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2682a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2683a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2684a13fb1a4SEric Sandeen return 0; 2685a13fb1a4SEric Sandeen } 2686a13fb1a4SEric Sandeen } 2687a13fb1a4SEric Sandeen return 1; 2688a13fb1a4SEric Sandeen } 2689a13fb1a4SEric Sandeen 269066e61a9eSTheodore Ts'o /* 269166e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 269266e61a9eSTheodore Ts'o * on the file system 269366e61a9eSTheodore Ts'o */ 269466e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 269566e61a9eSTheodore Ts'o { 269666e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 269766e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 269866e61a9eSTheodore Ts'o struct ext4_super_block *es; 269966e61a9eSTheodore Ts'o 270066e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 270166e61a9eSTheodore Ts'o es = sbi->s_es; 270266e61a9eSTheodore Ts'o 270366e61a9eSTheodore Ts'o if (es->s_error_count) 270466e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 270566e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 270666e61a9eSTheodore Ts'o if (es->s_first_error_time) { 270766e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 270866e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 270966e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 271066e61a9eSTheodore Ts'o es->s_first_error_func, 271166e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 271266e61a9eSTheodore Ts'o if (es->s_first_error_ino) 271366e61a9eSTheodore Ts'o printk(": inode %u", 271466e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 271566e61a9eSTheodore Ts'o if (es->s_first_error_block) 271666e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 271766e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 271866e61a9eSTheodore Ts'o printk("\n"); 271966e61a9eSTheodore Ts'o } 272066e61a9eSTheodore Ts'o if (es->s_last_error_time) { 272166e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 272266e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 272366e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 272466e61a9eSTheodore Ts'o es->s_last_error_func, 272566e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 272666e61a9eSTheodore Ts'o if (es->s_last_error_ino) 272766e61a9eSTheodore Ts'o printk(": inode %u", 272866e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 272966e61a9eSTheodore Ts'o if (es->s_last_error_block) 273066e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 273166e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 273266e61a9eSTheodore Ts'o printk("\n"); 273366e61a9eSTheodore Ts'o } 273466e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 273566e61a9eSTheodore Ts'o } 273666e61a9eSTheodore Ts'o 2737bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2738bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2739bfff6873SLukas Czerner { 2740bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2741bfff6873SLukas Czerner ext4_group_t group, ngroups; 2742bfff6873SLukas Czerner struct super_block *sb; 2743bfff6873SLukas Czerner unsigned long timeout = 0; 2744bfff6873SLukas Czerner int ret = 0; 2745bfff6873SLukas Czerner 2746bfff6873SLukas Czerner sb = elr->lr_super; 2747bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2748bfff6873SLukas Czerner 2749bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2750bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2751bfff6873SLukas Czerner if (!gdp) { 2752bfff6873SLukas Czerner ret = 1; 2753bfff6873SLukas Czerner break; 2754bfff6873SLukas Czerner } 2755bfff6873SLukas Czerner 2756bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2757bfff6873SLukas Czerner break; 2758bfff6873SLukas Czerner } 2759bfff6873SLukas Czerner 2760bfff6873SLukas Czerner if (group == ngroups) 2761bfff6873SLukas Czerner ret = 1; 2762bfff6873SLukas Czerner 2763bfff6873SLukas Czerner if (!ret) { 2764bfff6873SLukas Czerner timeout = jiffies; 2765bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2766bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2767bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 276851ce6511SLukas Czerner timeout = (jiffies - timeout) * 276951ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2770bfff6873SLukas Czerner elr->lr_timeout = timeout; 2771bfff6873SLukas Czerner } 2772bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2773bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2774bfff6873SLukas Czerner } 2775bfff6873SLukas Czerner 2776bfff6873SLukas Czerner return ret; 2777bfff6873SLukas Czerner } 2778bfff6873SLukas Czerner 2779bfff6873SLukas Czerner /* 2780bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 27814ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2782bfff6873SLukas Czerner */ 2783bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2784bfff6873SLukas Czerner { 2785bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2786bfff6873SLukas Czerner 2787bfff6873SLukas Czerner if (!elr) 2788bfff6873SLukas Czerner return; 2789bfff6873SLukas Czerner 2790bfff6873SLukas Czerner sbi = elr->lr_sbi; 2791bfff6873SLukas Czerner 2792bfff6873SLukas Czerner list_del(&elr->lr_request); 2793bfff6873SLukas Czerner sbi->s_li_request = NULL; 2794bfff6873SLukas Czerner kfree(elr); 2795bfff6873SLukas Czerner } 2796bfff6873SLukas Czerner 2797bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2798bfff6873SLukas Czerner { 27991bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 28001bb933fbSLukas Czerner if (!ext4_li_info) { 28011bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2802bfff6873SLukas Czerner return; 28031bb933fbSLukas Czerner } 2804bfff6873SLukas Czerner 2805bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 28061bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2807bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 28081bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2809bfff6873SLukas Czerner } 2810bfff6873SLukas Czerner 28118f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 28128f1f7453SEric Sandeen 2813bfff6873SLukas Czerner /* 2814bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2815bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2816bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2817bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2818bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2819bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2820bfff6873SLukas Czerner * next waking time and put itself into sleep. 2821bfff6873SLukas Czerner */ 2822bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2823bfff6873SLukas Czerner { 2824bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2825bfff6873SLukas Czerner struct list_head *pos, *n; 2826bfff6873SLukas Czerner struct ext4_li_request *elr; 28274ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2828bfff6873SLukas Czerner 2829bfff6873SLukas Czerner BUG_ON(NULL == eli); 2830bfff6873SLukas Czerner 2831bfff6873SLukas Czerner cont_thread: 2832bfff6873SLukas Czerner while (true) { 2833bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2834bfff6873SLukas Czerner 2835bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2836bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2837bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2838bfff6873SLukas Czerner goto exit_thread; 2839bfff6873SLukas Czerner } 2840bfff6873SLukas Czerner 2841bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2842bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2843bfff6873SLukas Czerner lr_request); 2844bfff6873SLukas Czerner 2845b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2846b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2847b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2848bfff6873SLukas Czerner ext4_remove_li_request(elr); 2849bfff6873SLukas Czerner continue; 2850bfff6873SLukas Czerner } 2851b2c78cd0STheodore Ts'o } 2852bfff6873SLukas Czerner 2853bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2854bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2855bfff6873SLukas Czerner } 2856bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2857bfff6873SLukas Czerner 2858bfff6873SLukas Czerner if (freezing(current)) 2859bfff6873SLukas Czerner refrigerator(); 2860bfff6873SLukas Czerner 28614ed5c033SLukas Czerner cur = jiffies; 28624ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2863f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2864bfff6873SLukas Czerner cond_resched(); 2865bfff6873SLukas Czerner continue; 2866bfff6873SLukas Czerner } 2867bfff6873SLukas Czerner 28684ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 28694ed5c033SLukas Czerner 28708f1f7453SEric Sandeen if (kthread_should_stop()) { 28718f1f7453SEric Sandeen ext4_clear_request_list(); 28728f1f7453SEric Sandeen goto exit_thread; 28738f1f7453SEric Sandeen } 2874bfff6873SLukas Czerner } 2875bfff6873SLukas Czerner 2876bfff6873SLukas Czerner exit_thread: 2877bfff6873SLukas Czerner /* 2878bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2879bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2880bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2881bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2882bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2883bfff6873SLukas Czerner * new one. 2884bfff6873SLukas Czerner */ 2885bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2886bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2887bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2888bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2889bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2890bfff6873SLukas Czerner goto cont_thread; 2891bfff6873SLukas Czerner } 2892bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2893bfff6873SLukas Czerner kfree(ext4_li_info); 2894bfff6873SLukas Czerner ext4_li_info = NULL; 2895bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2896bfff6873SLukas Czerner 2897bfff6873SLukas Czerner return 0; 2898bfff6873SLukas Czerner } 2899bfff6873SLukas Czerner 2900bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2901bfff6873SLukas Czerner { 2902bfff6873SLukas Czerner struct list_head *pos, *n; 2903bfff6873SLukas Czerner struct ext4_li_request *elr; 2904bfff6873SLukas Czerner 2905bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2906bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2907bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2908bfff6873SLukas Czerner lr_request); 2909bfff6873SLukas Czerner ext4_remove_li_request(elr); 2910bfff6873SLukas Czerner } 2911bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2912bfff6873SLukas Czerner } 2913bfff6873SLukas Czerner 2914bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2915bfff6873SLukas Czerner { 29168f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 29178f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 29188f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 29198f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2920bfff6873SLukas Czerner ext4_clear_request_list(); 2921bfff6873SLukas Czerner kfree(ext4_li_info); 2922bfff6873SLukas Czerner ext4_li_info = NULL; 2923bfff6873SLukas Czerner printk(KERN_CRIT "EXT4: error %d creating inode table " 2924bfff6873SLukas Czerner "initialization thread\n", 2925bfff6873SLukas Czerner err); 2926bfff6873SLukas Czerner return err; 2927bfff6873SLukas Czerner } 2928bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2929bfff6873SLukas Czerner return 0; 2930bfff6873SLukas Czerner } 2931bfff6873SLukas Czerner 2932bfff6873SLukas Czerner /* 2933bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2934bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2935bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2936bfff6873SLukas Czerner * groups and return total number of groups. 2937bfff6873SLukas Czerner */ 2938bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2939bfff6873SLukas Czerner { 2940bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2941bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2942bfff6873SLukas Czerner 2943bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2944bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2945bfff6873SLukas Czerner if (!gdp) 2946bfff6873SLukas Czerner continue; 2947bfff6873SLukas Czerner 2948bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2949bfff6873SLukas Czerner break; 2950bfff6873SLukas Czerner } 2951bfff6873SLukas Czerner 2952bfff6873SLukas Czerner return group; 2953bfff6873SLukas Czerner } 2954bfff6873SLukas Czerner 2955bfff6873SLukas Czerner static int ext4_li_info_new(void) 2956bfff6873SLukas Czerner { 2957bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2958bfff6873SLukas Czerner 2959bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2960bfff6873SLukas Czerner if (!eli) 2961bfff6873SLukas Czerner return -ENOMEM; 2962bfff6873SLukas Czerner 2963bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2964bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2965bfff6873SLukas Czerner 2966bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2967bfff6873SLukas Czerner 2968bfff6873SLukas Czerner ext4_li_info = eli; 2969bfff6873SLukas Czerner 2970bfff6873SLukas Czerner return 0; 2971bfff6873SLukas Czerner } 2972bfff6873SLukas Czerner 2973bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2974bfff6873SLukas Czerner ext4_group_t start) 2975bfff6873SLukas Czerner { 2976bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2977bfff6873SLukas Czerner struct ext4_li_request *elr; 2978bfff6873SLukas Czerner unsigned long rnd; 2979bfff6873SLukas Czerner 2980bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2981bfff6873SLukas Czerner if (!elr) 2982bfff6873SLukas Czerner return NULL; 2983bfff6873SLukas Czerner 2984bfff6873SLukas Czerner elr->lr_super = sb; 2985bfff6873SLukas Czerner elr->lr_sbi = sbi; 2986bfff6873SLukas Czerner elr->lr_next_group = start; 2987bfff6873SLukas Czerner 2988bfff6873SLukas Czerner /* 2989bfff6873SLukas Czerner * Randomize first schedule time of the request to 2990bfff6873SLukas Czerner * spread the inode table initialization requests 2991bfff6873SLukas Czerner * better. 2992bfff6873SLukas Czerner */ 2993bfff6873SLukas Czerner get_random_bytes(&rnd, sizeof(rnd)); 2994bfff6873SLukas Czerner elr->lr_next_sched = jiffies + (unsigned long)rnd % 2995bfff6873SLukas Czerner (EXT4_DEF_LI_MAX_START_DELAY * HZ); 2996bfff6873SLukas Czerner 2997bfff6873SLukas Czerner return elr; 2998bfff6873SLukas Czerner } 2999bfff6873SLukas Czerner 3000bfff6873SLukas Czerner static int ext4_register_li_request(struct super_block *sb, 3001bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3002bfff6873SLukas Czerner { 3003bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3004bfff6873SLukas Czerner struct ext4_li_request *elr; 3005bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 30066c5a6cb9SAndrew Morton int ret = 0; 3007bfff6873SLukas Czerner 300851ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 300951ce6511SLukas Czerner /* 301051ce6511SLukas Czerner * Reset timeout so it can be computed again, because 301151ce6511SLukas Czerner * s_li_wait_mult might have changed. 301251ce6511SLukas Czerner */ 301351ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 3014beed5ecbSNicolas Kaiser return 0; 301551ce6511SLukas Czerner } 3016bfff6873SLukas Czerner 3017bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3018bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 301955ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 3020beed5ecbSNicolas Kaiser return 0; 3021bfff6873SLukas Czerner 3022bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 3023beed5ecbSNicolas Kaiser if (!elr) 3024beed5ecbSNicolas Kaiser return -ENOMEM; 3025bfff6873SLukas Czerner 3026bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3027bfff6873SLukas Czerner 3028bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3029bfff6873SLukas Czerner ret = ext4_li_info_new(); 3030bfff6873SLukas Czerner if (ret) 3031bfff6873SLukas Czerner goto out; 3032bfff6873SLukas Czerner } 3033bfff6873SLukas Czerner 3034bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3035bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3036bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3037bfff6873SLukas Czerner 3038bfff6873SLukas Czerner sbi->s_li_request = elr; 303946e4690bSTao Ma /* 304046e4690bSTao Ma * set elr to NULL here since it has been inserted to 304146e4690bSTao Ma * the request_list and the removal and free of it is 304246e4690bSTao Ma * handled by ext4_clear_request_list from now on. 304346e4690bSTao Ma */ 304446e4690bSTao Ma elr = NULL; 3045bfff6873SLukas Czerner 3046bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3047bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3048bfff6873SLukas Czerner if (ret) 3049bfff6873SLukas Czerner goto out; 3050bfff6873SLukas Czerner } 3051bfff6873SLukas Czerner out: 3052bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3053beed5ecbSNicolas Kaiser if (ret) 3054bfff6873SLukas Czerner kfree(elr); 3055bfff6873SLukas Czerner return ret; 3056bfff6873SLukas Czerner } 3057bfff6873SLukas Czerner 3058bfff6873SLukas Czerner /* 3059bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3060bfff6873SLukas Czerner * module unload. 3061bfff6873SLukas Czerner */ 3062bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3063bfff6873SLukas Czerner { 3064bfff6873SLukas Czerner /* 3065bfff6873SLukas Czerner * If thread exited earlier 3066bfff6873SLukas Czerner * there's nothing to be done. 3067bfff6873SLukas Czerner */ 30688f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3069bfff6873SLukas Czerner return; 3070bfff6873SLukas Czerner 30718f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3072bfff6873SLukas Czerner } 3073bfff6873SLukas Czerner 3074617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 30757477827fSAneesh Kumar K.V __releases(kernel_lock) 30767477827fSAneesh Kumar K.V __acquires(kernel_lock) 3077ac27a0ecSDave Kleikamp { 3078d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3079ac27a0ecSDave Kleikamp struct buffer_head *bh; 3080617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3081617ba13bSMingming Cao struct ext4_sb_info *sbi; 3082617ba13bSMingming Cao ext4_fsblk_t block; 3083617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 308470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3085ac27a0ecSDave Kleikamp unsigned long offset = 0; 3086ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3087ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3088ac27a0ecSDave Kleikamp struct inode *root; 30899f6200bbSTheodore Ts'o char *cp; 30900390131bSFrank Mayhar const char *descr; 3091dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3092ac27a0ecSDave Kleikamp int blocksize; 30934ec11028STheodore Ts'o unsigned int db_count; 30944ec11028STheodore Ts'o unsigned int i; 3095f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 3096bd81d8eeSLaurent Vivier __u64 blocks_count; 3097833f4077SPeter Zijlstra int err; 3098b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3099bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3100ac27a0ecSDave Kleikamp 3101ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3102ac27a0ecSDave Kleikamp if (!sbi) 3103dcc7dae3SCyrill Gorcunov goto out_free_orig; 3104705895b6SPekka Enberg 3105705895b6SPekka Enberg sbi->s_blockgroup_lock = 3106705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3107705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3108705895b6SPekka Enberg kfree(sbi); 3109dcc7dae3SCyrill Gorcunov goto out_free_orig; 3110705895b6SPekka Enberg } 3111ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 3112ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 3113617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 3114617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 3115240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3116d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3117f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3118f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3119f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3120ac27a0ecSDave Kleikamp 31219f6200bbSTheodore Ts'o /* Cleanup superblock name */ 31229f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 31239f6200bbSTheodore Ts'o *cp = '!'; 31249f6200bbSTheodore Ts'o 3125dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3126617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3127ac27a0ecSDave Kleikamp if (!blocksize) { 3128b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3129ac27a0ecSDave Kleikamp goto out_fail; 3130ac27a0ecSDave Kleikamp } 3131ac27a0ecSDave Kleikamp 3132ac27a0ecSDave Kleikamp /* 3133617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3134ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3135ac27a0ecSDave Kleikamp */ 3136617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 313770bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 313870bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3139ac27a0ecSDave Kleikamp } else { 314070bbb3e0SAndrew Morton logical_sb_block = sb_block; 3141ac27a0ecSDave Kleikamp } 3142ac27a0ecSDave Kleikamp 314370bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3144b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3145ac27a0ecSDave Kleikamp goto out_fail; 3146ac27a0ecSDave Kleikamp } 3147ac27a0ecSDave Kleikamp /* 3148ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3149617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3150ac27a0ecSDave Kleikamp */ 3151617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3152ac27a0ecSDave Kleikamp sbi->s_es = es; 3153ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3154617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3155617ba13bSMingming Cao goto cantfind_ext4; 3156afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3157ac27a0ecSDave Kleikamp 3158ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3159ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3160fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3161617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3162fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 3163437ca0fdSDmitry Monakhov if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { 3164437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", 3165437ca0fdSDmitry Monakhov "2.6.38"); 3166fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3167437ca0fdSDmitry Monakhov } 3168617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3169fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3170ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 317103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 3172fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 31732e7842b8SHugh Dickins #endif 317403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3175fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 31762e7842b8SHugh Dickins #endif 31776fd7a467STheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 3178617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3179fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3180617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3181fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3182617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3183fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3184ac27a0ecSDave Kleikamp 3185617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3186fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3187bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3188fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3189bb4f397aSAneesh Kumar K.V else 3190fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 31918b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3192fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 31938b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3194fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3195ac27a0ecSDave Kleikamp 3196ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 3197ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 319830773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 319930773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 320030773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3201ac27a0ecSDave Kleikamp 32028b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3203fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3204ac27a0ecSDave Kleikamp 32051e2462f9SMingming Cao /* 3206dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3207dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3208dd919b98SAneesh Kumar K.V */ 32098b67f04aSTheodore Ts'o if (!IS_EXT3_SB(sb) && 32108b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3211fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3212dd919b98SAneesh Kumar K.V 321351ce6511SLukas Czerner /* 321451ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 321551ce6511SLukas Czerner * no mount option specified. 321651ce6511SLukas Czerner */ 321751ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 321851ce6511SLukas Czerner 32198b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 32208b67f04aSTheodore Ts'o &journal_devnum, &journal_ioprio, NULL, 0)) { 32218b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 32228b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 32238b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 32248b67f04aSTheodore Ts'o } 3225b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3226b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 3227ac27a0ecSDave Kleikamp goto failed_mount; 3228ac27a0ecSDave Kleikamp 3229*56889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 3230*56889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 3231*56889787STheodore Ts'o "with data=journal disables delayed " 3232*56889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 3233*56889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 3234*56889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 3235*56889787STheodore Ts'o "both data=journal and delalloc"); 3236*56889787STheodore Ts'o goto failed_mount; 3237*56889787STheodore Ts'o } 3238*56889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 3239*56889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 3240*56889787STheodore Ts'o "both data=journal and delalloc"); 3241*56889787STheodore Ts'o goto failed_mount; 3242*56889787STheodore Ts'o } 3243*56889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 3244*56889787STheodore Ts'o clear_opt(sb, DELALLOC); 3245*56889787STheodore Ts'o } 3246*56889787STheodore Ts'o 3247*56889787STheodore Ts'o blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3248*56889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 3249*56889787STheodore Ts'o if (blocksize < PAGE_SIZE) { 3250*56889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 3251*56889787STheodore Ts'o "dioread_nolock if block size != PAGE_SIZE"); 3252*56889787STheodore Ts'o goto failed_mount; 3253*56889787STheodore Ts'o } 3254*56889787STheodore Ts'o } 3255*56889787STheodore Ts'o 3256ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3257482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3258ac27a0ecSDave Kleikamp 3259617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3260617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3261617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3262617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3263b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3264b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3265b31e1552SEric Sandeen "running e2fsck is recommended"); 3266469108ffSTheodore Tso 32672035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 32682035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 32692035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 32702035e776STheodore Ts'o "using the ext4 subsystem"); 32712035e776STheodore Ts'o else { 32722035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 32732035e776STheodore Ts'o "to feature incompatibilities"); 32742035e776STheodore Ts'o goto failed_mount; 32752035e776STheodore Ts'o } 32762035e776STheodore Ts'o } 32772035e776STheodore Ts'o 32782035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 32792035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 32802035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 32812035e776STheodore Ts'o "using the ext4 subsystem"); 32822035e776STheodore Ts'o else { 32832035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 32842035e776STheodore Ts'o "to feature incompatibilities"); 32852035e776STheodore Ts'o goto failed_mount; 32862035e776STheodore Ts'o } 32872035e776STheodore Ts'o } 32882035e776STheodore Ts'o 3289469108ffSTheodore Tso /* 3290ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3291ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3292ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3293ac27a0ecSDave Kleikamp */ 3294a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3295ac27a0ecSDave Kleikamp goto failed_mount; 3296a13fb1a4SEric Sandeen 3297617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3298617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3299b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3300b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3301ac27a0ecSDave Kleikamp goto failed_mount; 3302ac27a0ecSDave Kleikamp } 3303ac27a0ecSDave Kleikamp 3304ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3305ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3306ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3307b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3308ce40733cSAneesh Kumar K.V blocksize); 3309ac27a0ecSDave Kleikamp goto failed_mount; 3310ac27a0ecSDave Kleikamp } 3311ac27a0ecSDave Kleikamp 3312ac27a0ecSDave Kleikamp brelse(bh); 331370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 331470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 331570bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3316ac27a0ecSDave Kleikamp if (!bh) { 3317b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3318b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3319ac27a0ecSDave Kleikamp goto failed_mount; 3320ac27a0ecSDave Kleikamp } 3321617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 3322ac27a0ecSDave Kleikamp sbi->s_es = es; 3323617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3324b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3325b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3326ac27a0ecSDave Kleikamp goto failed_mount; 3327ac27a0ecSDave Kleikamp } 3328ac27a0ecSDave Kleikamp } 3329ac27a0ecSDave Kleikamp 3330a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3331a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3332f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3333f287a1a5STheodore Ts'o has_huge_files); 3334f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3335ac27a0ecSDave Kleikamp 3336617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3337617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3338617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3339ac27a0ecSDave Kleikamp } else { 3340ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3341ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3342617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 33431330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3344ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3345b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3346b31e1552SEric Sandeen "unsupported inode size: %d", 3347ac27a0ecSDave Kleikamp sbi->s_inode_size); 3348ac27a0ecSDave Kleikamp goto failed_mount; 3349ac27a0ecSDave Kleikamp } 3350ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3351ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3352ac27a0ecSDave Kleikamp } 33530b8e58a1SAndreas Dilger 33540d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 33550d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 33568fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 33570d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3358d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3359b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3360b31e1552SEric Sandeen "unsupported descriptor size %lu", 33610d1ee42fSAlexandre Ratchov sbi->s_desc_size); 33620d1ee42fSAlexandre Ratchov goto failed_mount; 33630d1ee42fSAlexandre Ratchov } 33640d1ee42fSAlexandre Ratchov } else 33650d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 33660b8e58a1SAndreas Dilger 3367ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3368ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3369b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3370617ba13bSMingming Cao goto cantfind_ext4; 33710b8e58a1SAndreas Dilger 3372617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3373ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3374617ba13bSMingming Cao goto cantfind_ext4; 3375ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3376ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 33770d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3378ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3379ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3380e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3381e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 33820b8e58a1SAndreas Dilger 3383ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3384ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3385ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3386f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3387f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3388f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3389f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3390f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3391f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3392f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3393f99b2589STheodore Ts'o #else 3394f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3395f99b2589STheodore Ts'o #endif 3396f99b2589STheodore Ts'o sb->s_dirt = 1; 3397f99b2589STheodore Ts'o } 3398ac27a0ecSDave Kleikamp 3399ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3400b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3401b31e1552SEric Sandeen "#blocks per group too big: %lu", 3402ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3403ac27a0ecSDave Kleikamp goto failed_mount; 3404ac27a0ecSDave Kleikamp } 3405ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3406b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3407b31e1552SEric Sandeen "#inodes per group too big: %lu", 3408ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3409ac27a0ecSDave Kleikamp goto failed_mount; 3410ac27a0ecSDave Kleikamp } 3411ac27a0ecSDave Kleikamp 3412bf43d84bSEric Sandeen /* 3413bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3414bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3415bf43d84bSEric Sandeen */ 34165a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 341730ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 34185a9ae68aSDarrick J. Wong if (err) { 3419b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3420bf43d84bSEric Sandeen " too large to mount safely on this system"); 3421ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 342290c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 34235a9ae68aSDarrick J. Wong ret = err; 3424ac27a0ecSDave Kleikamp goto failed_mount; 3425ac27a0ecSDave Kleikamp } 3426ac27a0ecSDave Kleikamp 3427617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3428617ba13bSMingming Cao goto cantfind_ext4; 3429e7c95593SEric Sandeen 34300f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 34310f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 34320f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3433b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3434b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 34350f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 34360f2ddca6SFrom: Thiemo Nagel goto failed_mount; 34370f2ddca6SFrom: Thiemo Nagel } 34380f2ddca6SFrom: Thiemo Nagel 34394ec11028STheodore Ts'o /* 34404ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 34414ec11028STheodore Ts'o * of the filesystem. 34424ec11028STheodore Ts'o */ 34434ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3444b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 3445b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3446e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 34474ec11028STheodore Ts'o ext4_blocks_count(es)); 3448e7c95593SEric Sandeen goto failed_mount; 3449e7c95593SEric Sandeen } 3450bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3451bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3452bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3453bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 34544ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3455b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 34564ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3457b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 34584ec11028STheodore Ts'o ext4_blocks_count(es), 34594ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 34604ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 34614ec11028STheodore Ts'o goto failed_mount; 34624ec11028STheodore Ts'o } 3463bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3464fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3465fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3466617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3467617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3468f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3469f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3470ac27a0ecSDave Kleikamp GFP_KERNEL); 3471ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3472b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 3473ac27a0ecSDave Kleikamp goto failed_mount; 3474ac27a0ecSDave Kleikamp } 3475ac27a0ecSDave Kleikamp 34763244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 34779f6200bbSTheodore Ts'o if (ext4_proc_root) 34789f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 34793244fcb1SAlexander Beregalov #endif 3480240799cdSTheodore Ts'o 3481705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3482ac27a0ecSDave Kleikamp 3483ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 348470bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3485ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3486ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3487b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3488b31e1552SEric Sandeen "can't read group descriptor %d", i); 3489ac27a0ecSDave Kleikamp db_count = i; 3490ac27a0ecSDave Kleikamp goto failed_mount2; 3491ac27a0ecSDave Kleikamp } 3492ac27a0ecSDave Kleikamp } 3493bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3494b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3495ac27a0ecSDave Kleikamp goto failed_mount2; 3496ac27a0ecSDave Kleikamp } 3497772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3498772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3499b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3500b31e1552SEric Sandeen "unable to initialize " 3501b31e1552SEric Sandeen "flex_bg meta info!"); 3502772cb7c8SJose R. Santos goto failed_mount2; 3503772cb7c8SJose R. Santos } 3504772cb7c8SJose R. Santos 3505ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3506ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3507ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3508ac27a0ecSDave Kleikamp 350904496411STao Ma init_timer(&sbi->s_err_report); 351004496411STao Ma sbi->s_err_report.function = print_daily_error_info; 351104496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 351204496411STao Ma 3513ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeblocks_counter, 3514ce7e010aSTheodore Ts'o ext4_count_free_blocks(sb)); 3515ce7e010aSTheodore Ts'o if (!err) { 3516ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3517ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3518ce7e010aSTheodore Ts'o } 3519ce7e010aSTheodore Ts'o if (!err) { 3520ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3521ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3522ce7e010aSTheodore Ts'o } 3523ce7e010aSTheodore Ts'o if (!err) { 3524ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 3525ce7e010aSTheodore Ts'o } 3526ce7e010aSTheodore Ts'o if (err) { 3527ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 3528ce7e010aSTheodore Ts'o goto failed_mount3; 3529ce7e010aSTheodore Ts'o } 3530ce7e010aSTheodore Ts'o 3531c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 353255138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 3533c9de560dSAlex Tomas 3534ac27a0ecSDave Kleikamp /* 3535ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3536ac27a0ecSDave Kleikamp */ 35379ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 35389ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3539617ba13bSMingming Cao sb->s_op = &ext4_sops; 35409ca92389STheodore Ts'o else 35419ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3542617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3543617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3544ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3545617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 3546617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3547ac27a0ecSDave Kleikamp #endif 3548f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3549f2fa2ffcSAneesh Kumar K.V 3550ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 35513b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 35528f82f840SYongqiang Yang sbi->s_resize_flags = 0; 3553ac27a0ecSDave Kleikamp 3554ac27a0ecSDave Kleikamp sb->s_root = NULL; 3555ac27a0ecSDave Kleikamp 3556ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3557617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3558617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3559ac27a0ecSDave Kleikamp 3560c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3561c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3562c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 3563c5e06d10SJohann Lombardi goto failed_mount3; 3564c5e06d10SJohann Lombardi 3565ac27a0ecSDave Kleikamp /* 3566ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3567ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3568ac27a0ecSDave Kleikamp */ 3569ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3570617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3571617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3572ac27a0ecSDave Kleikamp goto failed_mount3; 35730390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 35740390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3575b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3576b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3577744692dcSJiaying Zhang goto failed_mount_wq; 3578ac27a0ecSDave Kleikamp } else { 3579fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 35800390131bSFrank Mayhar sbi->s_journal = NULL; 35810390131bSFrank Mayhar needs_recovery = 0; 35820390131bSFrank Mayhar goto no_journal; 3583ac27a0ecSDave Kleikamp } 3584ac27a0ecSDave Kleikamp 3585eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 3586eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3587eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3588b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3589744692dcSJiaying Zhang goto failed_mount_wq; 3590eb40a09cSJose R. Santos } 3591eb40a09cSJose R. Santos 3592d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 3593d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 3594d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3595d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3596d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 3597818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 3598818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 3599818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3600818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3601d4da6c9cSLinus Torvalds } else { 3602d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 3603d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3604d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3605d4da6c9cSLinus Torvalds } 3606818d276cSGirish Shilamkar 3607ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3608ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3609ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3610ac27a0ecSDave Kleikamp case 0: 3611ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 361263f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 361363f57933SAndrew Morton * cope, else JOURNAL_DATA 361463f57933SAndrew Morton */ 3615dab291afSMingming Cao if (jbd2_journal_check_available_features 3616dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3617fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3618ac27a0ecSDave Kleikamp else 3619fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3620ac27a0ecSDave Kleikamp break; 3621ac27a0ecSDave Kleikamp 3622617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3623617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3624dab291afSMingming Cao if (!jbd2_journal_check_available_features 3625dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3626b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3627b31e1552SEric Sandeen "requested data journaling mode"); 3628744692dcSJiaying Zhang goto failed_mount_wq; 3629ac27a0ecSDave Kleikamp } 3630ac27a0ecSDave Kleikamp default: 3631ac27a0ecSDave Kleikamp break; 3632ac27a0ecSDave Kleikamp } 3633b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3634ac27a0ecSDave Kleikamp 3635ce7e010aSTheodore Ts'o /* 3636ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 3637ce7e010aSTheodore Ts'o * need to update the global counters. 3638ce7e010aSTheodore Ts'o */ 3639ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeblocks_counter, 364084061e07SDmitry Monakhov ext4_count_free_blocks(sb)); 3641ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 364284061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 3643ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 364484061e07SDmitry Monakhov ext4_count_dirs(sb)); 3645ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirtyblocks_counter, 0); 3646206f7ab4SChristoph Hellwig 3647ce7e010aSTheodore Ts'o no_journal: 3648fd89d5f2STejun Heo /* 3649fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 3650fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 3651fd89d5f2STejun Heo */ 3652fd89d5f2STejun Heo EXT4_SB(sb)->dio_unwritten_wq = 3653ae005cbeSLinus Torvalds alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 36544c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 36554c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 36564c0425ffSMingming Cao goto failed_mount_wq; 36574c0425ffSMingming Cao } 36584c0425ffSMingming Cao 3659ac27a0ecSDave Kleikamp /* 3660dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3661ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3662ac27a0ecSDave Kleikamp */ 3663ac27a0ecSDave Kleikamp 36641d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 36651d1fe1eeSDavid Howells if (IS_ERR(root)) { 3666b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 36671d1fe1eeSDavid Howells ret = PTR_ERR(root); 366832a9bb57SManish Katiyar root = NULL; 3669ac27a0ecSDave Kleikamp goto failed_mount4; 3670ac27a0ecSDave Kleikamp } 3671ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3672b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 3673ac27a0ecSDave Kleikamp goto failed_mount4; 3674ac27a0ecSDave Kleikamp } 36751d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 36761d1fe1eeSDavid Howells if (!sb->s_root) { 3677b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 36781d1fe1eeSDavid Howells ret = -ENOMEM; 36791d1fe1eeSDavid Howells goto failed_mount4; 36801d1fe1eeSDavid Howells } 3681ac27a0ecSDave Kleikamp 3682617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 3683ef7f3835SKalpak Shah 3684ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3685ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3686ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3687ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3688ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3689ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3690ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3691ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3692ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3693ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3694ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3695ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3696ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3697ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3698ef7f3835SKalpak Shah } 3699ef7f3835SKalpak Shah } 3700ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3701ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3702ef7f3835SKalpak Shah sbi->s_inode_size) { 3703ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3704ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3705b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3706b31e1552SEric Sandeen "available"); 3707ef7f3835SKalpak Shah } 3708ef7f3835SKalpak Shah 37096fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 37106fd058f7STheodore Ts'o if (err) { 3711b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3712fbe845ddSCurt Wohlgemuth "zone (%d)", err); 37136fd058f7STheodore Ts'o goto failed_mount4; 37146fd058f7STheodore Ts'o } 37156fd058f7STheodore Ts'o 3716c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 3717c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 3718c2774d84SAneesh Kumar K.V if (err) { 3719421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3720c2774d84SAneesh Kumar K.V err); 3721c2774d84SAneesh Kumar K.V goto failed_mount4; 3722c2774d84SAneesh Kumar K.V } 3723c2774d84SAneesh Kumar K.V 3724bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3725bfff6873SLukas Czerner if (err) 3726bfff6873SLukas Czerner goto failed_mount4; 3727bfff6873SLukas Czerner 37283197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 37293197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 37303197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 37313197ebdbSTheodore Ts'o "%s", sb->s_id); 37323197ebdbSTheodore Ts'o if (err) { 37333197ebdbSTheodore Ts'o ext4_mb_release(sb); 37343197ebdbSTheodore Ts'o ext4_ext_release(sb); 37353197ebdbSTheodore Ts'o goto failed_mount4; 37363197ebdbSTheodore Ts'o }; 37373197ebdbSTheodore Ts'o 3738617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3739617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3740617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 37410390131bSFrank Mayhar if (needs_recovery) { 3742b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3743617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 37440390131bSFrank Mayhar } 37450390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 37460390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 37470390131bSFrank Mayhar descr = " journalled data mode"; 37480390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 37490390131bSFrank Mayhar descr = " ordered data mode"; 37500390131bSFrank Mayhar else 37510390131bSFrank Mayhar descr = " writeback data mode"; 37520390131bSFrank Mayhar } else 37530390131bSFrank Mayhar descr = "out journal"; 37540390131bSFrank Mayhar 3755d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 37568b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 37578b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 3758ac27a0ecSDave Kleikamp 375966e61a9eSTheodore Ts'o if (es->s_error_count) 376066e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 3761ac27a0ecSDave Kleikamp 3762d4c402d9SCurt Wohlgemuth kfree(orig_data); 3763ac27a0ecSDave Kleikamp return 0; 3764ac27a0ecSDave Kleikamp 3765617ba13bSMingming Cao cantfind_ext4: 3766ac27a0ecSDave Kleikamp if (!silent) 3767b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3768ac27a0ecSDave Kleikamp goto failed_mount; 3769ac27a0ecSDave Kleikamp 3770ac27a0ecSDave Kleikamp failed_mount4: 377132a9bb57SManish Katiyar iput(root); 377232a9bb57SManish Katiyar sb->s_root = NULL; 3773b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 37744c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 37754c0425ffSMingming Cao failed_mount_wq: 37766fd058f7STheodore Ts'o ext4_release_system_zone(sb); 37770390131bSFrank Mayhar if (sbi->s_journal) { 3778dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 377947b4a50bSJan Kara sbi->s_journal = NULL; 37800390131bSFrank Mayhar } 3781ac27a0ecSDave Kleikamp failed_mount3: 378204496411STao Ma del_timer(&sbi->s_err_report); 37839933fc0aSTheodore Ts'o if (sbi->s_flex_groups) 37849933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 3785ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeblocks_counter); 3786ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 3787ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 3788ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 3789c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 3790c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 3791ac27a0ecSDave Kleikamp failed_mount2: 3792ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 3793ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 3794f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 3795ac27a0ecSDave Kleikamp failed_mount: 3796240799cdSTheodore Ts'o if (sbi->s_proc) { 37979f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 3798240799cdSTheodore Ts'o } 3799ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3800ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3801ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3802ac27a0ecSDave Kleikamp #endif 3803617ba13bSMingming Cao ext4_blkdev_remove(sbi); 3804ac27a0ecSDave Kleikamp brelse(bh); 3805ac27a0ecSDave Kleikamp out_fail: 3806ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 3807f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 3808ac27a0ecSDave Kleikamp kfree(sbi); 3809dcc7dae3SCyrill Gorcunov out_free_orig: 3810d4c402d9SCurt Wohlgemuth kfree(orig_data); 38111d1fe1eeSDavid Howells return ret; 3812ac27a0ecSDave Kleikamp } 3813ac27a0ecSDave Kleikamp 3814ac27a0ecSDave Kleikamp /* 3815ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 3816ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 3817ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 3818ac27a0ecSDave Kleikamp */ 3819617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3820ac27a0ecSDave Kleikamp { 3821617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3822ac27a0ecSDave Kleikamp 3823ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 382430773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 382530773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3826ac27a0ecSDave Kleikamp 3827a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 3828ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3829dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3830ac27a0ecSDave Kleikamp else 3831dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 38325bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 38335bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 38345bf5683aSHidehiro Kawai else 38355bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3836a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 3837ac27a0ecSDave Kleikamp } 3838ac27a0ecSDave Kleikamp 3839617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3840ac27a0ecSDave Kleikamp unsigned int journal_inum) 3841ac27a0ecSDave Kleikamp { 3842ac27a0ecSDave Kleikamp struct inode *journal_inode; 3843ac27a0ecSDave Kleikamp journal_t *journal; 3844ac27a0ecSDave Kleikamp 38450390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 38460390131bSFrank Mayhar 3847ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3848ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3849ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3850ac27a0ecSDave Kleikamp 38511d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 38521d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3853b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3854ac27a0ecSDave Kleikamp return NULL; 3855ac27a0ecSDave Kleikamp } 3856ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3857ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3858ac27a0ecSDave Kleikamp iput(journal_inode); 3859b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3860ac27a0ecSDave Kleikamp return NULL; 3861ac27a0ecSDave Kleikamp } 3862ac27a0ecSDave Kleikamp 3863e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3864ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 38651d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3866b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3867ac27a0ecSDave Kleikamp iput(journal_inode); 3868ac27a0ecSDave Kleikamp return NULL; 3869ac27a0ecSDave Kleikamp } 3870ac27a0ecSDave Kleikamp 3871dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3872ac27a0ecSDave Kleikamp if (!journal) { 3873b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3874ac27a0ecSDave Kleikamp iput(journal_inode); 3875ac27a0ecSDave Kleikamp return NULL; 3876ac27a0ecSDave Kleikamp } 3877ac27a0ecSDave Kleikamp journal->j_private = sb; 3878617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3879ac27a0ecSDave Kleikamp return journal; 3880ac27a0ecSDave Kleikamp } 3881ac27a0ecSDave Kleikamp 3882617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3883ac27a0ecSDave Kleikamp dev_t j_dev) 3884ac27a0ecSDave Kleikamp { 3885ac27a0ecSDave Kleikamp struct buffer_head *bh; 3886ac27a0ecSDave Kleikamp journal_t *journal; 3887617ba13bSMingming Cao ext4_fsblk_t start; 3888617ba13bSMingming Cao ext4_fsblk_t len; 3889ac27a0ecSDave Kleikamp int hblock, blocksize; 3890617ba13bSMingming Cao ext4_fsblk_t sb_block; 3891ac27a0ecSDave Kleikamp unsigned long offset; 3892617ba13bSMingming Cao struct ext4_super_block *es; 3893ac27a0ecSDave Kleikamp struct block_device *bdev; 3894ac27a0ecSDave Kleikamp 38950390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 38960390131bSFrank Mayhar 3897b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3898ac27a0ecSDave Kleikamp if (bdev == NULL) 3899ac27a0ecSDave Kleikamp return NULL; 3900ac27a0ecSDave Kleikamp 3901ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3902e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3903ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3904b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3905b31e1552SEric Sandeen "blocksize too small for journal device"); 3906ac27a0ecSDave Kleikamp goto out_bdev; 3907ac27a0ecSDave Kleikamp } 3908ac27a0ecSDave Kleikamp 3909617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3910617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3911ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3912ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3913b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3914b31e1552SEric Sandeen "external journal"); 3915ac27a0ecSDave Kleikamp goto out_bdev; 3916ac27a0ecSDave Kleikamp } 3917ac27a0ecSDave Kleikamp 3918617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3919617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3920ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3921617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3922b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3923b31e1552SEric Sandeen "bad superblock"); 3924ac27a0ecSDave Kleikamp brelse(bh); 3925ac27a0ecSDave Kleikamp goto out_bdev; 3926ac27a0ecSDave Kleikamp } 3927ac27a0ecSDave Kleikamp 3928617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3929b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3930ac27a0ecSDave Kleikamp brelse(bh); 3931ac27a0ecSDave Kleikamp goto out_bdev; 3932ac27a0ecSDave Kleikamp } 3933ac27a0ecSDave Kleikamp 3934bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3935ac27a0ecSDave Kleikamp start = sb_block + 1; 3936ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3937ac27a0ecSDave Kleikamp 3938dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3939ac27a0ecSDave Kleikamp start, len, blocksize); 3940ac27a0ecSDave Kleikamp if (!journal) { 3941b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3942ac27a0ecSDave Kleikamp goto out_bdev; 3943ac27a0ecSDave Kleikamp } 3944ac27a0ecSDave Kleikamp journal->j_private = sb; 3945ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3946ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3947ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3948b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3949ac27a0ecSDave Kleikamp goto out_journal; 3950ac27a0ecSDave Kleikamp } 3951ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3952b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3953b31e1552SEric Sandeen "user (unsupported) - %d", 3954ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3955ac27a0ecSDave Kleikamp goto out_journal; 3956ac27a0ecSDave Kleikamp } 3957617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3958617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3959ac27a0ecSDave Kleikamp return journal; 39600b8e58a1SAndreas Dilger 3961ac27a0ecSDave Kleikamp out_journal: 3962dab291afSMingming Cao jbd2_journal_destroy(journal); 3963ac27a0ecSDave Kleikamp out_bdev: 3964617ba13bSMingming Cao ext4_blkdev_put(bdev); 3965ac27a0ecSDave Kleikamp return NULL; 3966ac27a0ecSDave Kleikamp } 3967ac27a0ecSDave Kleikamp 3968617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3969617ba13bSMingming Cao struct ext4_super_block *es, 3970ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3971ac27a0ecSDave Kleikamp { 3972ac27a0ecSDave Kleikamp journal_t *journal; 3973ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3974ac27a0ecSDave Kleikamp dev_t journal_dev; 3975ac27a0ecSDave Kleikamp int err = 0; 3976ac27a0ecSDave Kleikamp int really_read_only; 3977ac27a0ecSDave Kleikamp 39780390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 39790390131bSFrank Mayhar 3980ac27a0ecSDave Kleikamp if (journal_devnum && 3981ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3982b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3983b31e1552SEric Sandeen "numbers have changed"); 3984ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3985ac27a0ecSDave Kleikamp } else 3986ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3987ac27a0ecSDave Kleikamp 3988ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3989ac27a0ecSDave Kleikamp 3990ac27a0ecSDave Kleikamp /* 3991ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3992ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3993ac27a0ecSDave Kleikamp * can get read-write access to the device. 3994ac27a0ecSDave Kleikamp */ 3995617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3996ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3997b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3998b31e1552SEric Sandeen "required on readonly filesystem"); 3999ac27a0ecSDave Kleikamp if (really_read_only) { 4000b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4001b31e1552SEric Sandeen "unavailable, cannot proceed"); 4002ac27a0ecSDave Kleikamp return -EROFS; 4003ac27a0ecSDave Kleikamp } 4004b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4005b31e1552SEric Sandeen "be enabled during recovery"); 4006ac27a0ecSDave Kleikamp } 4007ac27a0ecSDave Kleikamp } 4008ac27a0ecSDave Kleikamp 4009ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4010b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4011b31e1552SEric Sandeen "and inode journals!"); 4012ac27a0ecSDave Kleikamp return -EINVAL; 4013ac27a0ecSDave Kleikamp } 4014ac27a0ecSDave Kleikamp 4015ac27a0ecSDave Kleikamp if (journal_inum) { 4016617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4017ac27a0ecSDave Kleikamp return -EINVAL; 4018ac27a0ecSDave Kleikamp } else { 4019617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4020ac27a0ecSDave Kleikamp return -EINVAL; 4021ac27a0ecSDave Kleikamp } 4022ac27a0ecSDave Kleikamp 402390576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4024b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 40254776004fSTheodore Ts'o 4026ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 4027dab291afSMingming Cao err = jbd2_journal_update_format(journal); 4028ac27a0ecSDave Kleikamp if (err) { 4029b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 4030dab291afSMingming Cao jbd2_journal_destroy(journal); 4031ac27a0ecSDave Kleikamp return err; 4032ac27a0ecSDave Kleikamp } 4033ac27a0ecSDave Kleikamp } 4034ac27a0ecSDave Kleikamp 4035617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4036dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 40371c13d5c0STheodore Ts'o if (!err) { 40381c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 40391c13d5c0STheodore Ts'o if (save) 40401c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 40411c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4042dab291afSMingming Cao err = jbd2_journal_load(journal); 40431c13d5c0STheodore Ts'o if (save) 40441c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 40451c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 40461c13d5c0STheodore Ts'o kfree(save); 40471c13d5c0STheodore Ts'o } 4048ac27a0ecSDave Kleikamp 4049ac27a0ecSDave Kleikamp if (err) { 4050b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4051dab291afSMingming Cao jbd2_journal_destroy(journal); 4052ac27a0ecSDave Kleikamp return err; 4053ac27a0ecSDave Kleikamp } 4054ac27a0ecSDave Kleikamp 4055617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4056617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4057ac27a0ecSDave Kleikamp 4058c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4059ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4060ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4061ac27a0ecSDave Kleikamp 4062ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4063e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4064ac27a0ecSDave Kleikamp } 4065ac27a0ecSDave Kleikamp 4066ac27a0ecSDave Kleikamp return 0; 4067ac27a0ecSDave Kleikamp } 4068ac27a0ecSDave Kleikamp 4069e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4070ac27a0ecSDave Kleikamp { 4071e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4072617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4073c4be0c1dSTakashi Sato int error = 0; 4074ac27a0ecSDave Kleikamp 4075ac27a0ecSDave Kleikamp if (!sbh) 4076c4be0c1dSTakashi Sato return error; 4077914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4078914258bfSTheodore Ts'o /* 4079914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4080914258bfSTheodore Ts'o * superblock failed. This could happen because the 4081914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4082914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4083914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4084914258bfSTheodore Ts'o * write and hope for the best. 4085914258bfSTheodore Ts'o */ 4086b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4087b31e1552SEric Sandeen "superblock detected"); 4088914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4089914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4090914258bfSTheodore Ts'o } 409171290b36STheodore Ts'o /* 409271290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 409371290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 409471290b36STheodore Ts'o * write time when we are mounting the root file system 409571290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 409671290b36STheodore Ts'o * for people who are east of GMT and who make their clock 409771290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 409871290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 409971290b36STheodore Ts'o * to complain and force a full file system check. 410071290b36STheodore Ts'o */ 410171290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4102ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4103f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4104afc32f7eSTheodore Ts'o es->s_kbytes_written = 4105afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4106afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4107afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4108f613dfcbSTheodore Ts'o else 4109f613dfcbSTheodore Ts'o es->s_kbytes_written = 4110f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 41115d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 41125d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 41137f93cff9STheodore Ts'o es->s_free_inodes_count = 41147f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 41155d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 41167234ab2aSTheodore Ts'o sb->s_dirt = 0; 4117ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 4118ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4119914258bfSTheodore Ts'o if (sync) { 4120c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4121c4be0c1dSTakashi Sato if (error) 4122c4be0c1dSTakashi Sato return error; 4123c4be0c1dSTakashi Sato 4124c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4125c4be0c1dSTakashi Sato if (error) { 4126b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4127b31e1552SEric Sandeen "superblock"); 4128914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4129914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4130914258bfSTheodore Ts'o } 4131914258bfSTheodore Ts'o } 4132c4be0c1dSTakashi Sato return error; 4133ac27a0ecSDave Kleikamp } 4134ac27a0ecSDave Kleikamp 4135ac27a0ecSDave Kleikamp /* 4136ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4137ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4138ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4139ac27a0ecSDave Kleikamp */ 4140617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4141617ba13bSMingming Cao struct ext4_super_block *es) 4142ac27a0ecSDave Kleikamp { 4143617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4144ac27a0ecSDave Kleikamp 41450390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 41460390131bSFrank Mayhar BUG_ON(journal != NULL); 41470390131bSFrank Mayhar return; 41480390131bSFrank Mayhar } 4149dab291afSMingming Cao jbd2_journal_lock_updates(journal); 41507ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 41517ffe1ea8SHidehiro Kawai goto out; 41527ffe1ea8SHidehiro Kawai 4153617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4154ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4155617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4156e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4157ac27a0ecSDave Kleikamp } 41587ffe1ea8SHidehiro Kawai 41597ffe1ea8SHidehiro Kawai out: 4160dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4161ac27a0ecSDave Kleikamp } 4162ac27a0ecSDave Kleikamp 4163ac27a0ecSDave Kleikamp /* 4164ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4165ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4166ac27a0ecSDave Kleikamp * main filesystem now. 4167ac27a0ecSDave Kleikamp */ 4168617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4169617ba13bSMingming Cao struct ext4_super_block *es) 4170ac27a0ecSDave Kleikamp { 4171ac27a0ecSDave Kleikamp journal_t *journal; 4172ac27a0ecSDave Kleikamp int j_errno; 4173ac27a0ecSDave Kleikamp const char *errstr; 4174ac27a0ecSDave Kleikamp 41750390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 41760390131bSFrank Mayhar 4177617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4178ac27a0ecSDave Kleikamp 4179ac27a0ecSDave Kleikamp /* 4180ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4181617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4182ac27a0ecSDave Kleikamp */ 4183ac27a0ecSDave Kleikamp 4184dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4185ac27a0ecSDave Kleikamp if (j_errno) { 4186ac27a0ecSDave Kleikamp char nbuf[16]; 4187ac27a0ecSDave Kleikamp 4188617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 418912062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4190ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 419112062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4192ac27a0ecSDave Kleikamp 4193617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4194617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4195e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4196ac27a0ecSDave Kleikamp 4197dab291afSMingming Cao jbd2_journal_clear_err(journal); 4198ac27a0ecSDave Kleikamp } 4199ac27a0ecSDave Kleikamp } 4200ac27a0ecSDave Kleikamp 4201ac27a0ecSDave Kleikamp /* 4202ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4203ac27a0ecSDave Kleikamp * and wait on the commit. 4204ac27a0ecSDave Kleikamp */ 4205617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4206ac27a0ecSDave Kleikamp { 4207ac27a0ecSDave Kleikamp journal_t *journal; 42080390131bSFrank Mayhar int ret = 0; 4209ac27a0ecSDave Kleikamp 4210ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4211ac27a0ecSDave Kleikamp return 0; 4212ac27a0ecSDave Kleikamp 4213617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 42146b0310fbSEric Sandeen if (journal) { 4215437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 4216617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 42176b0310fbSEric Sandeen } 42180390131bSFrank Mayhar 4219ac27a0ecSDave Kleikamp return ret; 4220ac27a0ecSDave Kleikamp } 4221ac27a0ecSDave Kleikamp 4222617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 4223ac27a0ecSDave Kleikamp { 4224ebc1ac16SChristoph Hellwig lock_super(sb); 4225e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4226ebc1ac16SChristoph Hellwig unlock_super(sb); 42270390131bSFrank Mayhar } 4228ac27a0ecSDave Kleikamp 4229617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4230ac27a0ecSDave Kleikamp { 423114ce0cb4STheodore Ts'o int ret = 0; 42329eddacf9SJan Kara tid_t target; 42338d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4234ac27a0ecSDave Kleikamp 42359bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 42368d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 42378d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4238ac27a0ecSDave Kleikamp if (wait) 42398d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 42400390131bSFrank Mayhar } 424114ce0cb4STheodore Ts'o return ret; 4242ac27a0ecSDave Kleikamp } 4243ac27a0ecSDave Kleikamp 4244ac27a0ecSDave Kleikamp /* 4245ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4246ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4247be4f27d3SYongqiang Yang * 4248be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 4249be4f27d3SYongqiang Yang * state independently, because ext4 prevents a new handle from being started 4250be4f27d3SYongqiang Yang * by @sb->s_frozen, which stays in an upper layer. It thus needs help from 4251be4f27d3SYongqiang Yang * the upper layer. 4252ac27a0ecSDave Kleikamp */ 4253c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4254ac27a0ecSDave Kleikamp { 4255c4be0c1dSTakashi Sato int error = 0; 4256c4be0c1dSTakashi Sato journal_t *journal; 4257ac27a0ecSDave Kleikamp 42589ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 42599ca92389STheodore Ts'o return 0; 42609ca92389STheodore Ts'o 4261c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4262ac27a0ecSDave Kleikamp 4263ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4264dab291afSMingming Cao jbd2_journal_lock_updates(journal); 42657ffe1ea8SHidehiro Kawai 42667ffe1ea8SHidehiro Kawai /* 42679ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 42689ca92389STheodore Ts'o * the journal. 42697ffe1ea8SHidehiro Kawai */ 4270c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 42716b0310fbSEric Sandeen if (error < 0) 42726b0310fbSEric Sandeen goto out; 4273ac27a0ecSDave Kleikamp 4274ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4275617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4276e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 42776b0310fbSEric Sandeen out: 42786b0310fbSEric Sandeen /* we rely on s_frozen to stop further updates */ 42796b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 42806b0310fbSEric Sandeen return error; 4281ac27a0ecSDave Kleikamp } 4282ac27a0ecSDave Kleikamp 4283ac27a0ecSDave Kleikamp /* 4284ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4285ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4286ac27a0ecSDave Kleikamp */ 4287c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4288ac27a0ecSDave Kleikamp { 42899ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 42909ca92389STheodore Ts'o return 0; 42919ca92389STheodore Ts'o 4292ac27a0ecSDave Kleikamp lock_super(sb); 42939ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4294617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4295e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4296ac27a0ecSDave Kleikamp unlock_super(sb); 4297c4be0c1dSTakashi Sato return 0; 4298ac27a0ecSDave Kleikamp } 4299ac27a0ecSDave Kleikamp 4300673c6100STheodore Ts'o /* 4301673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4302673c6100STheodore Ts'o */ 4303673c6100STheodore Ts'o struct ext4_mount_options { 4304673c6100STheodore Ts'o unsigned long s_mount_opt; 4305a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 4306673c6100STheodore Ts'o uid_t s_resuid; 4307673c6100STheodore Ts'o gid_t s_resgid; 4308673c6100STheodore Ts'o unsigned long s_commit_interval; 4309673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4310673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4311673c6100STheodore Ts'o int s_jquota_fmt; 4312673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4313673c6100STheodore Ts'o #endif 4314673c6100STheodore Ts'o }; 4315673c6100STheodore Ts'o 4316617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4317ac27a0ecSDave Kleikamp { 4318617ba13bSMingming Cao struct ext4_super_block *es; 4319617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4320617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 4321ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4322617ba13bSMingming Cao struct ext4_mount_options old_opts; 4323c79d967dSChristoph Hellwig int enable_quota = 0; 43248a266467STheodore Ts'o ext4_group_t g; 4325b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4326c5e06d10SJohann Lombardi int err = 0; 4327ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4328ac27a0ecSDave Kleikamp int i; 4329ac27a0ecSDave Kleikamp #endif 4330d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4331ac27a0ecSDave Kleikamp 4332ac27a0ecSDave Kleikamp /* Store the original options */ 4333bbd6851aSAl Viro lock_super(sb); 4334ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4335ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4336a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4337ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4338ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4339ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 434030773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 434130773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4342ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4343ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4344ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4345ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 4346ac27a0ecSDave Kleikamp #endif 4347b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4348b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4349ac27a0ecSDave Kleikamp 4350ac27a0ecSDave Kleikamp /* 4351ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4352ac27a0ecSDave Kleikamp */ 4353b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 4354b3881f74STheodore Ts'o &n_blocks_count, 1)) { 4355ac27a0ecSDave Kleikamp err = -EINVAL; 4356ac27a0ecSDave Kleikamp goto restore_opts; 4357ac27a0ecSDave Kleikamp } 4358ac27a0ecSDave Kleikamp 43594ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4360c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4361ac27a0ecSDave Kleikamp 4362ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4363482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4364ac27a0ecSDave Kleikamp 4365ac27a0ecSDave Kleikamp es = sbi->s_es; 4366ac27a0ecSDave Kleikamp 4367b3881f74STheodore Ts'o if (sbi->s_journal) { 4368617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4369b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4370b3881f74STheodore Ts'o } 4371ac27a0ecSDave Kleikamp 4372ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 4373bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 43744ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4375ac27a0ecSDave Kleikamp err = -EROFS; 4376ac27a0ecSDave Kleikamp goto restore_opts; 4377ac27a0ecSDave Kleikamp } 4378ac27a0ecSDave Kleikamp 4379ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 43800f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 43810f0dd62fSChristoph Hellwig if (err < 0) 4382c79d967dSChristoph Hellwig goto restore_opts; 4383c79d967dSChristoph Hellwig 4384ac27a0ecSDave Kleikamp /* 4385ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4386ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4387ac27a0ecSDave Kleikamp */ 4388ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4389ac27a0ecSDave Kleikamp 4390ac27a0ecSDave Kleikamp /* 4391ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4392ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4393ac27a0ecSDave Kleikamp * mark the partition as valid again. 4394ac27a0ecSDave Kleikamp */ 4395617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4396617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4397ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4398ac27a0ecSDave Kleikamp 4399a63c9eb2STheodore Ts'o if (sbi->s_journal) 4400617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4401ac27a0ecSDave Kleikamp } else { 4402a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4403a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4404ac27a0ecSDave Kleikamp err = -EROFS; 4405ac27a0ecSDave Kleikamp goto restore_opts; 4406ac27a0ecSDave Kleikamp } 4407ead6596bSEric Sandeen /* 44088a266467STheodore Ts'o * Make sure the group descriptor checksums 44090b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 44108a266467STheodore Ts'o */ 44118a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 44128a266467STheodore Ts'o struct ext4_group_desc *gdp = 44138a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 44148a266467STheodore Ts'o 44158a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 4416b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4417b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 44188a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 44198a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 44208a266467STheodore Ts'o err = -EINVAL; 44218a266467STheodore Ts'o goto restore_opts; 44228a266467STheodore Ts'o } 44238a266467STheodore Ts'o } 44248a266467STheodore Ts'o 44258a266467STheodore Ts'o /* 4426ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4427ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4428ead6596bSEric Sandeen * require a full umount/remount for now. 4429ead6596bSEric Sandeen */ 4430ead6596bSEric Sandeen if (es->s_last_orphan) { 4431b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4432ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4433ead6596bSEric Sandeen "orphan inode list. Please " 4434b31e1552SEric Sandeen "umount/remount instead"); 4435ead6596bSEric Sandeen err = -EINVAL; 4436ead6596bSEric Sandeen goto restore_opts; 4437ead6596bSEric Sandeen } 4438ead6596bSEric Sandeen 4439ac27a0ecSDave Kleikamp /* 4440ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4441ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4442ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4443ac27a0ecSDave Kleikamp * the partition.) 4444ac27a0ecSDave Kleikamp */ 44450390131bSFrank Mayhar if (sbi->s_journal) 4446617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4447ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4448617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 4449ac27a0ecSDave Kleikamp goto restore_opts; 4450617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4451ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4452c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4453c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4454c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4455c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4456c5e06d10SJohann Lombardi err = -EROFS; 4457c5e06d10SJohann Lombardi goto restore_opts; 4458c5e06d10SJohann Lombardi } 4459c79d967dSChristoph Hellwig enable_quota = 1; 4460ac27a0ecSDave Kleikamp } 4461ac27a0ecSDave Kleikamp } 4462bfff6873SLukas Czerner 4463bfff6873SLukas Czerner /* 4464bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4465bfff6873SLukas Czerner * current settings 4466bfff6873SLukas Czerner */ 4467bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4468bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4469bfff6873SLukas Czerner else { 4470bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4471bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4472bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4473bfff6873SLukas Czerner } 4474bfff6873SLukas Czerner 44756fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 44760390131bSFrank Mayhar if (sbi->s_journal == NULL) 4477e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 44780390131bSFrank Mayhar 4479ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4480ac27a0ecSDave Kleikamp /* Release old quota file names */ 4481ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4482ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 4483ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4484ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 4485ac27a0ecSDave Kleikamp #endif 4486bbd6851aSAl Viro unlock_super(sb); 4487c79d967dSChristoph Hellwig if (enable_quota) 44880f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 4489d4c402d9SCurt Wohlgemuth 4490d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4491d4c402d9SCurt Wohlgemuth kfree(orig_data); 4492ac27a0ecSDave Kleikamp return 0; 44930b8e58a1SAndreas Dilger 4494ac27a0ecSDave Kleikamp restore_opts: 4495ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4496ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4497a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4498ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4499ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4500ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 450130773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 450230773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4503ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4504ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4505ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4506ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 4507ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4508ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4509ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4510ac27a0ecSDave Kleikamp } 4511ac27a0ecSDave Kleikamp #endif 4512bbd6851aSAl Viro unlock_super(sb); 4513d4c402d9SCurt Wohlgemuth kfree(orig_data); 4514ac27a0ecSDave Kleikamp return err; 4515ac27a0ecSDave Kleikamp } 4516ac27a0ecSDave Kleikamp 4517617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4518ac27a0ecSDave Kleikamp { 4519ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4520617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4521617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 4522960cc398SPekka Enberg u64 fsid; 4523d02a9391SKazuya Mio s64 bfree; 4524ac27a0ecSDave Kleikamp 45255e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 45265e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 45276bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 45288df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 45295e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 4530ac27a0ecSDave Kleikamp 4531ac27a0ecSDave Kleikamp /* 45325e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 45335e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 45345e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 4535ac27a0ecSDave Kleikamp */ 4536ac27a0ecSDave Kleikamp 4537ac27a0ecSDave Kleikamp /* 4538ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 4539ac27a0ecSDave Kleikamp * overhead 4540ac27a0ecSDave Kleikamp */ 4541ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 4542ac27a0ecSDave Kleikamp 4543ac27a0ecSDave Kleikamp /* 4544ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 4545ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 4546ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 4547ac27a0ecSDave Kleikamp */ 4548ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 4549617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 4550617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 4551ac27a0ecSDave Kleikamp cond_resched(); 4552ac27a0ecSDave Kleikamp } 4553ac27a0ecSDave Kleikamp 4554ac27a0ecSDave Kleikamp /* 4555ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 4556ac27a0ecSDave Kleikamp * bitmap, and an inode table. 4557ac27a0ecSDave Kleikamp */ 45585e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 45595e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 45605e70030dSBadari Pulavarty smp_wmb(); 45616bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 4562ac27a0ecSDave Kleikamp } 4563ac27a0ecSDave Kleikamp 4564617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4565ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 45665e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 4567d02a9391SKazuya Mio bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 45686bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 4569d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 4570d02a9391SKazuya Mio buf->f_bfree = max_t(s64, bfree, 0); 4571bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 4572bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 4573ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4574ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 457552d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4576617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4577960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4578960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4579960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4580960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 45810b8e58a1SAndreas Dilger 4582ac27a0ecSDave Kleikamp return 0; 4583ac27a0ecSDave Kleikamp } 4584ac27a0ecSDave Kleikamp 45850b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 45860b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4587ac27a0ecSDave Kleikamp * Process 1 Process 2 4588617ba13bSMingming Cao * ext4_create() quota_sync() 4589dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4590871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4591dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4592ac27a0ecSDave Kleikamp * 4593ac27a0ecSDave Kleikamp */ 4594ac27a0ecSDave Kleikamp 4595ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4596ac27a0ecSDave Kleikamp 4597ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4598ac27a0ecSDave Kleikamp { 4599ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 4600ac27a0ecSDave Kleikamp } 4601ac27a0ecSDave Kleikamp 4602617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4603ac27a0ecSDave Kleikamp { 4604ac27a0ecSDave Kleikamp int ret, err; 4605ac27a0ecSDave Kleikamp handle_t *handle; 4606ac27a0ecSDave Kleikamp struct inode *inode; 4607ac27a0ecSDave Kleikamp 4608ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 4609617ba13bSMingming Cao handle = ext4_journal_start(inode, 4610617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4611ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4612ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4613ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4614617ba13bSMingming Cao err = ext4_journal_stop(handle); 4615ac27a0ecSDave Kleikamp if (!ret) 4616ac27a0ecSDave Kleikamp ret = err; 4617ac27a0ecSDave Kleikamp return ret; 4618ac27a0ecSDave Kleikamp } 4619ac27a0ecSDave Kleikamp 4620617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4621ac27a0ecSDave Kleikamp { 4622ac27a0ecSDave Kleikamp int ret, err; 4623ac27a0ecSDave Kleikamp handle_t *handle; 4624ac27a0ecSDave Kleikamp 4625617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4626617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4627ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4628ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4629ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4630617ba13bSMingming Cao err = ext4_journal_stop(handle); 4631ac27a0ecSDave Kleikamp if (!ret) 4632ac27a0ecSDave Kleikamp ret = err; 4633ac27a0ecSDave Kleikamp return ret; 4634ac27a0ecSDave Kleikamp } 4635ac27a0ecSDave Kleikamp 4636617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4637ac27a0ecSDave Kleikamp { 4638ac27a0ecSDave Kleikamp int ret, err; 4639ac27a0ecSDave Kleikamp handle_t *handle; 4640ac27a0ecSDave Kleikamp 4641617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4642617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 46439c3013e9SJan Kara if (IS_ERR(handle)) { 46449c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 46459c3013e9SJan Kara dquot_release(dquot); 4646ac27a0ecSDave Kleikamp return PTR_ERR(handle); 46479c3013e9SJan Kara } 4648ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4649617ba13bSMingming Cao err = ext4_journal_stop(handle); 4650ac27a0ecSDave Kleikamp if (!ret) 4651ac27a0ecSDave Kleikamp ret = err; 4652ac27a0ecSDave Kleikamp return ret; 4653ac27a0ecSDave Kleikamp } 4654ac27a0ecSDave Kleikamp 4655617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4656ac27a0ecSDave Kleikamp { 46572c8be6b2SJan Kara /* Are we journaling quotas? */ 4658617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 4659617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 4660ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4661617ba13bSMingming Cao return ext4_write_dquot(dquot); 4662ac27a0ecSDave Kleikamp } else { 4663ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4664ac27a0ecSDave Kleikamp } 4665ac27a0ecSDave Kleikamp } 4666ac27a0ecSDave Kleikamp 4667617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4668ac27a0ecSDave Kleikamp { 4669ac27a0ecSDave Kleikamp int ret, err; 4670ac27a0ecSDave Kleikamp handle_t *handle; 4671ac27a0ecSDave Kleikamp 4672ac27a0ecSDave Kleikamp /* Data block + inode block */ 4673617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 4674ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4675ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4676ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4677617ba13bSMingming Cao err = ext4_journal_stop(handle); 4678ac27a0ecSDave Kleikamp if (!ret) 4679ac27a0ecSDave Kleikamp ret = err; 4680ac27a0ecSDave Kleikamp return ret; 4681ac27a0ecSDave Kleikamp } 4682ac27a0ecSDave Kleikamp 4683ac27a0ecSDave Kleikamp /* 4684ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4685ac27a0ecSDave Kleikamp * the quota file and such... 4686ac27a0ecSDave Kleikamp */ 4687617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4688ac27a0ecSDave Kleikamp { 4689287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4690617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4691ac27a0ecSDave Kleikamp } 4692ac27a0ecSDave Kleikamp 4693ac27a0ecSDave Kleikamp /* 4694ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4695ac27a0ecSDave Kleikamp */ 4696617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4697f00c9e44SJan Kara struct path *path) 4698ac27a0ecSDave Kleikamp { 4699ac27a0ecSDave Kleikamp int err; 4700ac27a0ecSDave Kleikamp 4701ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4702ac27a0ecSDave Kleikamp return -EINVAL; 47030623543bSJan Kara 4704ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 4705f00c9e44SJan Kara if (path->mnt->mnt_sb != sb) 4706ac27a0ecSDave Kleikamp return -EXDEV; 47070623543bSJan Kara /* Journaling quota? */ 47080623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 47092b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 4710f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 4711b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4712b31e1552SEric Sandeen "Quota file not on filesystem root. " 4713b31e1552SEric Sandeen "Journaled quota will not work"); 47140623543bSJan Kara } 47150623543bSJan Kara 47160623543bSJan Kara /* 47170623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 47180623543bSJan Kara * all updates to the file when we bypass pagecache... 47190623543bSJan Kara */ 47200390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 4721f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 47220623543bSJan Kara /* 47230623543bSJan Kara * We don't need to lock updates but journal_flush() could 47240623543bSJan Kara * otherwise be livelocked... 47250623543bSJan Kara */ 47260623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 47277ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 47280623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 4729f00c9e44SJan Kara if (err) 47307ffe1ea8SHidehiro Kawai return err; 47317ffe1ea8SHidehiro Kawai } 47320623543bSJan Kara 4733f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 4734ac27a0ecSDave Kleikamp } 4735ac27a0ecSDave Kleikamp 4736ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 4737ca0e05e4SDmitry Monakhov { 473821f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 473921f97697SJan Kara handle_t *handle; 474021f97697SJan Kara 474187009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 474287009d86SDmitry Monakhov * Caller already holds s_umount sem */ 474387009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 4744ca0e05e4SDmitry Monakhov sync_filesystem(sb); 4745ca0e05e4SDmitry Monakhov 47460b268590SAmir Goldstein if (!inode) 47470b268590SAmir Goldstein goto out; 47480b268590SAmir Goldstein 474921f97697SJan Kara /* Update modification times of quota files when userspace can 475021f97697SJan Kara * start looking at them */ 475121f97697SJan Kara handle = ext4_journal_start(inode, 1); 475221f97697SJan Kara if (IS_ERR(handle)) 475321f97697SJan Kara goto out; 475421f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 475521f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 475621f97697SJan Kara ext4_journal_stop(handle); 475721f97697SJan Kara 475821f97697SJan Kara out: 4759ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 4760ca0e05e4SDmitry Monakhov } 4761ca0e05e4SDmitry Monakhov 4762ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 4763ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 4764ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 4765ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 4766617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 4767ac27a0ecSDave Kleikamp size_t len, loff_t off) 4768ac27a0ecSDave Kleikamp { 4769ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4770725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4771ac27a0ecSDave Kleikamp int err = 0; 4772ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4773ac27a0ecSDave Kleikamp int tocopy; 4774ac27a0ecSDave Kleikamp size_t toread; 4775ac27a0ecSDave Kleikamp struct buffer_head *bh; 4776ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 4777ac27a0ecSDave Kleikamp 4778ac27a0ecSDave Kleikamp if (off > i_size) 4779ac27a0ecSDave Kleikamp return 0; 4780ac27a0ecSDave Kleikamp if (off+len > i_size) 4781ac27a0ecSDave Kleikamp len = i_size-off; 4782ac27a0ecSDave Kleikamp toread = len; 4783ac27a0ecSDave Kleikamp while (toread > 0) { 4784ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 4785ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 4786617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 4787ac27a0ecSDave Kleikamp if (err) 4788ac27a0ecSDave Kleikamp return err; 4789ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 4790ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 4791ac27a0ecSDave Kleikamp else 4792ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 4793ac27a0ecSDave Kleikamp brelse(bh); 4794ac27a0ecSDave Kleikamp offset = 0; 4795ac27a0ecSDave Kleikamp toread -= tocopy; 4796ac27a0ecSDave Kleikamp data += tocopy; 4797ac27a0ecSDave Kleikamp blk++; 4798ac27a0ecSDave Kleikamp } 4799ac27a0ecSDave Kleikamp return len; 4800ac27a0ecSDave Kleikamp } 4801ac27a0ecSDave Kleikamp 4802ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 4803ac27a0ecSDave Kleikamp * enough credits) */ 4804617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 4805ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 4806ac27a0ecSDave Kleikamp { 4807ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4808725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4809ac27a0ecSDave Kleikamp int err = 0; 4810ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4811ac27a0ecSDave Kleikamp struct buffer_head *bh; 4812ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 4813ac27a0ecSDave Kleikamp 48140390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 4815b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4816b31e1552SEric Sandeen " cancelled because transaction is not started", 48179c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 48189c3013e9SJan Kara return -EIO; 48199c3013e9SJan Kara } 482067eeb568SDmitry Monakhov /* 482167eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 482267eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 482367eeb568SDmitry Monakhov */ 482467eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 482567eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 482667eeb568SDmitry Monakhov " cancelled because not block aligned", 482767eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 482867eeb568SDmitry Monakhov return -EIO; 482967eeb568SDmitry Monakhov } 483067eeb568SDmitry Monakhov 4831ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 4832617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 4833ac27a0ecSDave Kleikamp if (!bh) 4834ac27a0ecSDave Kleikamp goto out; 4835617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 4836ac27a0ecSDave Kleikamp if (err) { 4837ac27a0ecSDave Kleikamp brelse(bh); 4838ac27a0ecSDave Kleikamp goto out; 4839ac27a0ecSDave Kleikamp } 4840ac27a0ecSDave Kleikamp lock_buffer(bh); 484167eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 4842ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 4843ac27a0ecSDave Kleikamp unlock_buffer(bh); 48440390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 4845ac27a0ecSDave Kleikamp brelse(bh); 4846ac27a0ecSDave Kleikamp out: 484767eeb568SDmitry Monakhov if (err) { 48484d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 4849ac27a0ecSDave Kleikamp return err; 48504d04e4fbSJan Kara } 485167eeb568SDmitry Monakhov if (inode->i_size < off + len) { 485267eeb568SDmitry Monakhov i_size_write(inode, off + len); 4853617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 4854617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 485521f97697SJan Kara } 4856ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 485767eeb568SDmitry Monakhov return len; 4858ac27a0ecSDave Kleikamp } 4859ac27a0ecSDave Kleikamp 4860ac27a0ecSDave Kleikamp #endif 4861ac27a0ecSDave Kleikamp 4862152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 4863152a0836SAl Viro const char *dev_name, void *data) 4864ac27a0ecSDave Kleikamp { 4865152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 4866ac27a0ecSDave Kleikamp } 4867ac27a0ecSDave Kleikamp 486837f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 486924b58424STheodore Ts'o static inline void register_as_ext2(void) 487024b58424STheodore Ts'o { 487124b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 487224b58424STheodore Ts'o if (err) 487324b58424STheodore Ts'o printk(KERN_WARNING 487424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 487524b58424STheodore Ts'o } 487624b58424STheodore Ts'o 487724b58424STheodore Ts'o static inline void unregister_as_ext2(void) 487824b58424STheodore Ts'o { 487924b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 488024b58424STheodore Ts'o } 48812035e776STheodore Ts'o 48822035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 48832035e776STheodore Ts'o { 48842035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 48852035e776STheodore Ts'o return 0; 48862035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 48872035e776STheodore Ts'o return 1; 48882035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 48892035e776STheodore Ts'o return 0; 48902035e776STheodore Ts'o return 1; 48912035e776STheodore Ts'o } 489251b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 489324b58424STheodore Ts'o #else 489424b58424STheodore Ts'o static inline void register_as_ext2(void) { } 489524b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 48962035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 489724b58424STheodore Ts'o #endif 489824b58424STheodore Ts'o 489937f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 490024b58424STheodore Ts'o static inline void register_as_ext3(void) 490124b58424STheodore Ts'o { 490224b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 490324b58424STheodore Ts'o if (err) 490424b58424STheodore Ts'o printk(KERN_WARNING 490524b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 490624b58424STheodore Ts'o } 490724b58424STheodore Ts'o 490824b58424STheodore Ts'o static inline void unregister_as_ext3(void) 490924b58424STheodore Ts'o { 491024b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 491124b58424STheodore Ts'o } 49122035e776STheodore Ts'o 49132035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 49142035e776STheodore Ts'o { 49152035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 49162035e776STheodore Ts'o return 0; 49172035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 49182035e776STheodore Ts'o return 0; 49192035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 49202035e776STheodore Ts'o return 1; 49212035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 49222035e776STheodore Ts'o return 0; 49232035e776STheodore Ts'o return 1; 49242035e776STheodore Ts'o } 492551b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 492624b58424STheodore Ts'o #else 492724b58424STheodore Ts'o static inline void register_as_ext3(void) { } 492824b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 49292035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 493024b58424STheodore Ts'o #endif 493124b58424STheodore Ts'o 493203010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 4933ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 493403010a33STheodore Ts'o .name = "ext4", 4935152a0836SAl Viro .mount = ext4_mount, 4936ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 4937ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 4938ac27a0ecSDave Kleikamp }; 4939ac27a0ecSDave Kleikamp 49408f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 4941857ac889SLukas Czerner { 4942857ac889SLukas Czerner struct ext4_features *ef; 4943857ac889SLukas Czerner int ret = -ENOMEM; 4944857ac889SLukas Czerner 4945857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 4946857ac889SLukas Czerner if (!ef) 4947857ac889SLukas Czerner goto out; 4948857ac889SLukas Czerner 4949857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 4950857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 4951857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 4952857ac889SLukas Czerner "features"); 4953857ac889SLukas Czerner if (ret) { 4954857ac889SLukas Czerner kfree(ef); 4955857ac889SLukas Czerner goto out; 4956857ac889SLukas Czerner } 4957857ac889SLukas Czerner 4958857ac889SLukas Czerner ext4_feat = ef; 4959857ac889SLukas Czerner ret = 0; 4960857ac889SLukas Czerner out: 4961857ac889SLukas Czerner return ret; 4962857ac889SLukas Czerner } 4963857ac889SLukas Czerner 49648f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 49658f021222SLukas Czerner { 49668f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 49678f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 49688f021222SLukas Czerner kfree(ext4_feat); 49698f021222SLukas Czerner } 49708f021222SLukas Czerner 4971e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 4972e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 4973e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 4974e9e3bcecSEric Sandeen 49755dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 4976ac27a0ecSDave Kleikamp { 4977e9e3bcecSEric Sandeen int i, err; 4978c9de560dSAlex Tomas 497912e9b892SDmitry Monakhov ext4_check_flag_values(); 4980e9e3bcecSEric Sandeen 4981e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 4982e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 4983e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 4984e9e3bcecSEric Sandeen } 4985e9e3bcecSEric Sandeen 49865dabfc78STheodore Ts'o err = ext4_init_pageio(); 49876fd058f7STheodore Ts'o if (err) 49886fd058f7STheodore Ts'o return err; 49895dabfc78STheodore Ts'o err = ext4_init_system_zone(); 4990bd2d0210STheodore Ts'o if (err) 4991dd68314cSTheodore Ts'o goto out7; 49923197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 49933197ebdbSTheodore Ts'o if (!ext4_kset) 4994dd68314cSTheodore Ts'o goto out6; 49959f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 4996dd68314cSTheodore Ts'o if (!ext4_proc_root) 4997dd68314cSTheodore Ts'o goto out5; 4998857ac889SLukas Czerner 4999857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5000dd68314cSTheodore Ts'o if (err) 5001dd68314cSTheodore Ts'o goto out4; 5002857ac889SLukas Czerner 50035dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5004ac27a0ecSDave Kleikamp if (err) 50056fd058f7STheodore Ts'o goto out3; 5006c9de560dSAlex Tomas 50075dabfc78STheodore Ts'o err = ext4_init_xattr(); 5008c9de560dSAlex Tomas if (err) 5009c9de560dSAlex Tomas goto out2; 5010ac27a0ecSDave Kleikamp err = init_inodecache(); 5011ac27a0ecSDave Kleikamp if (err) 5012ac27a0ecSDave Kleikamp goto out1; 501324b58424STheodore Ts'o register_as_ext3(); 50142035e776STheodore Ts'o register_as_ext2(); 501503010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5016ac27a0ecSDave Kleikamp if (err) 5017ac27a0ecSDave Kleikamp goto out; 5018bfff6873SLukas Czerner 5019bfff6873SLukas Czerner ext4_li_info = NULL; 5020bfff6873SLukas Czerner mutex_init(&ext4_li_mtx); 5021ac27a0ecSDave Kleikamp return 0; 5022ac27a0ecSDave Kleikamp out: 502324b58424STheodore Ts'o unregister_as_ext2(); 502424b58424STheodore Ts'o unregister_as_ext3(); 5025ac27a0ecSDave Kleikamp destroy_inodecache(); 5026ac27a0ecSDave Kleikamp out1: 50275dabfc78STheodore Ts'o ext4_exit_xattr(); 5028c9de560dSAlex Tomas out2: 50295dabfc78STheodore Ts'o ext4_exit_mballoc(); 50306fd058f7STheodore Ts'o out3: 50318f021222SLukas Czerner ext4_exit_feat_adverts(); 50326fd058f7STheodore Ts'o out4: 5033dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5034bd2d0210STheodore Ts'o out5: 5035dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5036dd68314cSTheodore Ts'o out6: 5037dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5038dd68314cSTheodore Ts'o out7: 50395dabfc78STheodore Ts'o ext4_exit_pageio(); 5040ac27a0ecSDave Kleikamp return err; 5041ac27a0ecSDave Kleikamp } 5042ac27a0ecSDave Kleikamp 50435dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5044ac27a0ecSDave Kleikamp { 5045bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 504624b58424STheodore Ts'o unregister_as_ext2(); 504724b58424STheodore Ts'o unregister_as_ext3(); 504803010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5049ac27a0ecSDave Kleikamp destroy_inodecache(); 50505dabfc78STheodore Ts'o ext4_exit_xattr(); 50515dabfc78STheodore Ts'o ext4_exit_mballoc(); 50528f021222SLukas Czerner ext4_exit_feat_adverts(); 50539f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 50543197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 50555dabfc78STheodore Ts'o ext4_exit_system_zone(); 50565dabfc78STheodore Ts'o ext4_exit_pageio(); 5057ac27a0ecSDave Kleikamp } 5058ac27a0ecSDave Kleikamp 5059ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 506083982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5061ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 50625dabfc78STheodore Ts'o module_init(ext4_init_fs) 50635dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5064