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" 486f91bc5fSEric Gouriou #include "ext4_extents.h" 493dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 50ac27a0ecSDave Kleikamp #include "xattr.h" 51ac27a0ecSDave Kleikamp #include "acl.h" 523661d286STheodore Ts'o #include "mballoc.h" 53ac27a0ecSDave Kleikamp 549bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 559bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 569bffad1eSTheodore Ts'o 571f109d5aSTheodore Ts'o static struct proc_dir_entry *ext4_proc_root; 583197ebdbSTheodore Ts'o static struct kset *ext4_kset; 590b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 600b75a840SLukas Czerner static struct mutex ext4_li_mtx; 610b75a840SLukas Czerner static struct ext4_features *ext4_feat; 629f6200bbSTheodore Ts'o 63617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 64ac27a0ecSDave Kleikamp unsigned long journal_devnum); 65e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 66617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 67617ba13bSMingming Cao struct ext4_super_block *es); 68617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 69617ba13bSMingming Cao struct ext4_super_block *es); 70617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 71617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 72ac27a0ecSDave Kleikamp char nbuf[16]); 73617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 74617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 75c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 76617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 77c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 78152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 79152a0836SAl Viro const char *dev_name, void *data); 802035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 812035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 82d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 83bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 84bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 858f1f7453SEric Sandeen static void ext4_clear_request_list(void); 86ac27a0ecSDave Kleikamp 872035e776STheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 882035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 892035e776STheodore Ts'o .owner = THIS_MODULE, 902035e776STheodore Ts'o .name = "ext2", 912035e776STheodore Ts'o .mount = ext4_mount, 922035e776STheodore Ts'o .kill_sb = kill_block_super, 932035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 942035e776STheodore Ts'o }; 952035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 962035e776STheodore Ts'o #else 972035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 982035e776STheodore Ts'o #endif 992035e776STheodore Ts'o 1002035e776STheodore Ts'o 101ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 102ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 103ba69f9abSJan Kara .owner = THIS_MODULE, 104ba69f9abSJan Kara .name = "ext3", 105152a0836SAl Viro .mount = ext4_mount, 106ba69f9abSJan Kara .kill_sb = kill_block_super, 107ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 108ba69f9abSJan Kara }; 109ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 110ba69f9abSJan Kara #else 111ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 112ba69f9abSJan Kara #endif 113bd81d8eeSLaurent Vivier 1149933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1159933fc0aSTheodore Ts'o { 1169933fc0aSTheodore Ts'o void *ret; 1179933fc0aSTheodore Ts'o 1189933fc0aSTheodore Ts'o ret = kmalloc(size, flags); 1199933fc0aSTheodore Ts'o if (!ret) 1209933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1219933fc0aSTheodore Ts'o return ret; 1229933fc0aSTheodore Ts'o } 1239933fc0aSTheodore Ts'o 1249933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1259933fc0aSTheodore Ts'o { 1269933fc0aSTheodore Ts'o void *ret; 1279933fc0aSTheodore Ts'o 128db9481c0SMathias Krause ret = kzalloc(size, flags); 1299933fc0aSTheodore Ts'o if (!ret) 1309933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1319933fc0aSTheodore Ts'o return ret; 1329933fc0aSTheodore Ts'o } 1339933fc0aSTheodore Ts'o 1349933fc0aSTheodore Ts'o void ext4_kvfree(void *ptr) 1359933fc0aSTheodore Ts'o { 1369933fc0aSTheodore Ts'o if (is_vmalloc_addr(ptr)) 1379933fc0aSTheodore Ts'o vfree(ptr); 1389933fc0aSTheodore Ts'o else 1399933fc0aSTheodore Ts'o kfree(ptr); 1409933fc0aSTheodore Ts'o 1419933fc0aSTheodore Ts'o } 1429933fc0aSTheodore Ts'o 1438fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1448fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 145bd81d8eeSLaurent Vivier { 1463a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1478fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1488fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 149bd81d8eeSLaurent Vivier } 150bd81d8eeSLaurent Vivier 1518fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1528fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 153bd81d8eeSLaurent Vivier { 1545272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 1558fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1568fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 157bd81d8eeSLaurent Vivier } 158bd81d8eeSLaurent Vivier 1598fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 1608fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 161bd81d8eeSLaurent Vivier { 1625272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 1638fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1648fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 165bd81d8eeSLaurent Vivier } 166bd81d8eeSLaurent Vivier 167021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 168560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 169560671a0SAneesh Kumar K.V { 170560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 171560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 172560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 173560671a0SAneesh Kumar K.V } 174560671a0SAneesh Kumar K.V 175560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 176560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 177560671a0SAneesh Kumar K.V { 178560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 179560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 180560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 181560671a0SAneesh Kumar K.V } 182560671a0SAneesh Kumar K.V 183560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 184560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 185560671a0SAneesh Kumar K.V { 186560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 187560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 188560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 189560671a0SAneesh Kumar K.V } 190560671a0SAneesh Kumar K.V 191560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 192560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 193560671a0SAneesh Kumar K.V { 194560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 195560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 196560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 197560671a0SAneesh Kumar K.V } 198560671a0SAneesh Kumar K.V 1998fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2008fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 201bd81d8eeSLaurent Vivier { 2023a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2038fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2048fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 205bd81d8eeSLaurent Vivier } 206bd81d8eeSLaurent Vivier 2078fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2088fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 209bd81d8eeSLaurent Vivier { 2105272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2118fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2128fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 213bd81d8eeSLaurent Vivier } 214bd81d8eeSLaurent Vivier 2158fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2168fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 217bd81d8eeSLaurent Vivier { 2185272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2198fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2208fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 221bd81d8eeSLaurent Vivier } 222bd81d8eeSLaurent Vivier 223021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 224560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 225560671a0SAneesh Kumar K.V { 226560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 227560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 228560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 229560671a0SAneesh Kumar K.V } 230560671a0SAneesh Kumar K.V 231560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 232560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 233560671a0SAneesh Kumar K.V { 234560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 235560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 236560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 237560671a0SAneesh Kumar K.V } 238560671a0SAneesh Kumar K.V 239560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 240560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 241560671a0SAneesh Kumar K.V { 242560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 243560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 244560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 245560671a0SAneesh Kumar K.V } 246560671a0SAneesh Kumar K.V 247560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 248560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 249560671a0SAneesh Kumar K.V { 250560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 251560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 252560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 253560671a0SAneesh Kumar K.V } 254560671a0SAneesh Kumar K.V 255d3d1faf6SCurt Wohlgemuth 256d3d1faf6SCurt Wohlgemuth /* Just increment the non-pointer handle value */ 257d3d1faf6SCurt Wohlgemuth static handle_t *ext4_get_nojournal(void) 258d3d1faf6SCurt Wohlgemuth { 259d3d1faf6SCurt Wohlgemuth handle_t *handle = current->journal_info; 260d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 261d3d1faf6SCurt Wohlgemuth 262d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); 263d3d1faf6SCurt Wohlgemuth 264d3d1faf6SCurt Wohlgemuth ref_cnt++; 265d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 266d3d1faf6SCurt Wohlgemuth 267d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 268d3d1faf6SCurt Wohlgemuth return handle; 269d3d1faf6SCurt Wohlgemuth } 270d3d1faf6SCurt Wohlgemuth 271d3d1faf6SCurt Wohlgemuth 272d3d1faf6SCurt Wohlgemuth /* Decrement the non-pointer handle value */ 273d3d1faf6SCurt Wohlgemuth static void ext4_put_nojournal(handle_t *handle) 274d3d1faf6SCurt Wohlgemuth { 275d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 276d3d1faf6SCurt Wohlgemuth 277d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt == 0); 278d3d1faf6SCurt Wohlgemuth 279d3d1faf6SCurt Wohlgemuth ref_cnt--; 280d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 281d3d1faf6SCurt Wohlgemuth 282d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 283d3d1faf6SCurt Wohlgemuth } 284d3d1faf6SCurt Wohlgemuth 285ac27a0ecSDave Kleikamp /* 286dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 287ac27a0ecSDave Kleikamp * 288ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 289ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 290ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 291ac27a0ecSDave Kleikamp * appropriate. 292be4f27d3SYongqiang Yang * 293be4f27d3SYongqiang Yang * To avoid j_barrier hold in userspace when a user calls freeze(), 294be4f27d3SYongqiang Yang * ext4 prevents a new handle from being started by s_frozen, which 295be4f27d3SYongqiang Yang * is in an upper layer. 296ac27a0ecSDave Kleikamp */ 297617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 298ac27a0ecSDave Kleikamp { 299ac27a0ecSDave Kleikamp journal_t *journal; 300be4f27d3SYongqiang Yang handle_t *handle; 301ac27a0ecSDave Kleikamp 30212706394STheodore Ts'o trace_ext4_journal_start(sb, nblocks, _RET_IP_); 303ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 304ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 305ac27a0ecSDave Kleikamp 306617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 307be4f27d3SYongqiang Yang handle = ext4_journal_current_handle(); 308be4f27d3SYongqiang Yang 309be4f27d3SYongqiang Yang /* 310be4f27d3SYongqiang Yang * If a handle has been started, it should be allowed to 311be4f27d3SYongqiang Yang * finish, otherwise deadlock could happen between freeze 312be4f27d3SYongqiang Yang * and others(e.g. truncate) due to the restart of the 313be4f27d3SYongqiang Yang * journal handle if the filesystem is forzen and active 314be4f27d3SYongqiang Yang * handles are not stopped. 315be4f27d3SYongqiang Yang */ 316be4f27d3SYongqiang Yang if (!handle) 317be4f27d3SYongqiang Yang vfs_check_frozen(sb, SB_FREEZE_TRANS); 318be4f27d3SYongqiang Yang 319be4f27d3SYongqiang Yang if (!journal) 320be4f27d3SYongqiang Yang return ext4_get_nojournal(); 321be4f27d3SYongqiang Yang /* 322be4f27d3SYongqiang Yang * Special case here: if the journal has aborted behind our 323be4f27d3SYongqiang Yang * backs (eg. EIO in the commit thread), then we still need to 324be4f27d3SYongqiang Yang * take the FS itself readonly cleanly. 325be4f27d3SYongqiang Yang */ 326ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 327c67d859eSTheodore Ts'o ext4_abort(sb, "Detected aborted journal"); 328ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 329ac27a0ecSDave Kleikamp } 330dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 331ac27a0ecSDave Kleikamp } 332ac27a0ecSDave Kleikamp 333ac27a0ecSDave Kleikamp /* 334ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 335dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 336ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 337ac27a0ecSDave Kleikamp * appropriate. 338ac27a0ecSDave Kleikamp */ 339c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) 340ac27a0ecSDave Kleikamp { 341ac27a0ecSDave Kleikamp struct super_block *sb; 342ac27a0ecSDave Kleikamp int err; 343ac27a0ecSDave Kleikamp int rc; 344ac27a0ecSDave Kleikamp 3450390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 346d3d1faf6SCurt Wohlgemuth ext4_put_nojournal(handle); 3470390131bSFrank Mayhar return 0; 3480390131bSFrank Mayhar } 349ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 350ac27a0ecSDave Kleikamp err = handle->h_err; 351dab291afSMingming Cao rc = jbd2_journal_stop(handle); 352ac27a0ecSDave Kleikamp 353ac27a0ecSDave Kleikamp if (!err) 354ac27a0ecSDave Kleikamp err = rc; 355ac27a0ecSDave Kleikamp if (err) 356c398eda0STheodore Ts'o __ext4_std_error(sb, where, line, err); 357ac27a0ecSDave Kleikamp return err; 358ac27a0ecSDave Kleikamp } 359ac27a0ecSDave Kleikamp 36090c7201bSTheodore Ts'o void ext4_journal_abort_handle(const char *caller, unsigned int line, 36190c7201bSTheodore Ts'o const char *err_fn, struct buffer_head *bh, 36290c7201bSTheodore Ts'o handle_t *handle, int err) 363ac27a0ecSDave Kleikamp { 364ac27a0ecSDave Kleikamp char nbuf[16]; 365617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 366ac27a0ecSDave Kleikamp 3670390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 3680390131bSFrank Mayhar 369ac27a0ecSDave Kleikamp if (bh) 370ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 371ac27a0ecSDave Kleikamp 372ac27a0ecSDave Kleikamp if (!handle->h_err) 373ac27a0ecSDave Kleikamp handle->h_err = err; 374ac27a0ecSDave Kleikamp 375ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 376ac27a0ecSDave Kleikamp return; 377ac27a0ecSDave Kleikamp 37890c7201bSTheodore Ts'o printk(KERN_ERR "%s:%d: aborting transaction: %s in %s\n", 37990c7201bSTheodore Ts'o caller, line, errstr, err_fn); 380ac27a0ecSDave Kleikamp 381dab291afSMingming Cao jbd2_journal_abort_handle(handle); 382ac27a0ecSDave Kleikamp } 383ac27a0ecSDave Kleikamp 3841c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3851c13d5c0STheodore Ts'o unsigned int line) 3861c13d5c0STheodore Ts'o { 3871c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3881c13d5c0STheodore Ts'o 3891c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3901c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3911c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3921c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3931c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3941c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3951c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3961c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3971c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3981c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3991c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 4001c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 4011c13d5c0STheodore Ts'o } 40266e61a9eSTheodore Ts'o /* 40366e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 40466e61a9eSTheodore Ts'o * started already 40566e61a9eSTheodore Ts'o */ 40666e61a9eSTheodore Ts'o if (!es->s_error_count) 40766e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 4081c13d5c0STheodore Ts'o es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); 4091c13d5c0STheodore Ts'o } 4101c13d5c0STheodore Ts'o 4111c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 4121c13d5c0STheodore Ts'o unsigned int line) 4131c13d5c0STheodore Ts'o { 4141c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 4151c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 4161c13d5c0STheodore Ts'o } 4171c13d5c0STheodore Ts'o 4187c2e7087STheodore Ts'o /* 4197c2e7087STheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 4207c2e7087STheodore Ts'o * structures, including the bdi structure, without telling anyone 4217c2e7087STheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 4227c2e7087STheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 4237c2e7087STheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 4247c2e7087STheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 4257c2e7087STheodore Ts'o */ 4267c2e7087STheodore Ts'o static int block_device_ejected(struct super_block *sb) 4277c2e7087STheodore Ts'o { 4287c2e7087STheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 4297c2e7087STheodore Ts'o struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; 4307c2e7087STheodore Ts'o 4317c2e7087STheodore Ts'o return bdi->dev == NULL; 4327c2e7087STheodore Ts'o } 4337c2e7087STheodore Ts'o 434*18aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 435*18aadd47SBobi Jam { 436*18aadd47SBobi Jam struct super_block *sb = journal->j_private; 437*18aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 438*18aadd47SBobi Jam int error = is_journal_aborted(journal); 439*18aadd47SBobi Jam struct ext4_journal_cb_entry *jce, *tmp; 440*18aadd47SBobi Jam 441*18aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 442*18aadd47SBobi Jam list_for_each_entry_safe(jce, tmp, &txn->t_private_list, jce_list) { 443*18aadd47SBobi Jam list_del_init(&jce->jce_list); 444*18aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 445*18aadd47SBobi Jam jce->jce_func(sb, jce, error); 446*18aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 447*18aadd47SBobi Jam } 448*18aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 449*18aadd47SBobi Jam } 4501c13d5c0STheodore Ts'o 451ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 452ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 453ac27a0ecSDave Kleikamp * 454ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 455617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 456ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 457ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 458ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 459ac27a0ecSDave Kleikamp * write out the superblock safely. 460ac27a0ecSDave Kleikamp * 461dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 462d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 463ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 464ac27a0ecSDave Kleikamp */ 465ac27a0ecSDave Kleikamp 466617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 467ac27a0ecSDave Kleikamp { 468ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 469ac27a0ecSDave Kleikamp return; 470ac27a0ecSDave Kleikamp 471ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 472617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 473ac27a0ecSDave Kleikamp 4744ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 475ac27a0ecSDave Kleikamp if (journal) 476dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 477ac27a0ecSDave Kleikamp } 478ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 479b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 480ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 481ac27a0ecSDave Kleikamp } 482ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 483617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 484ac27a0ecSDave Kleikamp sb->s_id); 485ac27a0ecSDave Kleikamp } 486ac27a0ecSDave Kleikamp 48712062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 488c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 489ac27a0ecSDave Kleikamp { 4900ff2ea7dSJoe Perches struct va_format vaf; 491ac27a0ecSDave Kleikamp va_list args; 492ac27a0ecSDave Kleikamp 493ac27a0ecSDave Kleikamp va_start(args, fmt); 4940ff2ea7dSJoe Perches vaf.fmt = fmt; 4950ff2ea7dSJoe Perches vaf.va = &args; 4960ff2ea7dSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4970ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 498ac27a0ecSDave Kleikamp va_end(args); 499ac27a0ecSDave Kleikamp 500617ba13bSMingming Cao ext4_handle_error(sb); 501ac27a0ecSDave Kleikamp } 502ac27a0ecSDave Kleikamp 503c398eda0STheodore Ts'o void ext4_error_inode(struct inode *inode, const char *function, 504c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 505273df556SFrank Mayhar const char *fmt, ...) 506273df556SFrank Mayhar { 507273df556SFrank Mayhar va_list args; 508f7c21177STheodore Ts'o struct va_format vaf; 5091c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 510273df556SFrank Mayhar 5111c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 5121c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 5131c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 514273df556SFrank Mayhar va_start(args, fmt); 515f7c21177STheodore Ts'o vaf.fmt = fmt; 516f7c21177STheodore Ts'o vaf.va = &args; 517c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 518c398eda0STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 519c398eda0STheodore Ts'o if (block) 520f7c21177STheodore Ts'o printk(KERN_CONT "block %llu: ", block); 521f7c21177STheodore Ts'o printk(KERN_CONT "comm %s: %pV\n", current->comm, &vaf); 522273df556SFrank Mayhar va_end(args); 523273df556SFrank Mayhar 524273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 525273df556SFrank Mayhar } 526273df556SFrank Mayhar 527c398eda0STheodore Ts'o void ext4_error_file(struct file *file, const char *function, 528f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 529f7c21177STheodore Ts'o const char *fmt, ...) 530273df556SFrank Mayhar { 531273df556SFrank Mayhar va_list args; 532f7c21177STheodore Ts'o struct va_format vaf; 5331c13d5c0STheodore Ts'o struct ext4_super_block *es; 534273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 535273df556SFrank Mayhar char pathname[80], *path; 536273df556SFrank Mayhar 5371c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 5381c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 5391c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 540273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 541f9a62d09SDan Carpenter if (IS_ERR(path)) 542273df556SFrank Mayhar path = "(unknown)"; 543273df556SFrank Mayhar printk(KERN_CRIT 544f7c21177STheodore Ts'o "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 545f7c21177STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 546f7c21177STheodore Ts'o if (block) 547f7c21177STheodore Ts'o printk(KERN_CONT "block %llu: ", block); 548f7c21177STheodore Ts'o va_start(args, fmt); 549f7c21177STheodore Ts'o vaf.fmt = fmt; 550f7c21177STheodore Ts'o vaf.va = &args; 551f7c21177STheodore Ts'o printk(KERN_CONT "comm %s: path %s: %pV\n", current->comm, path, &vaf); 552273df556SFrank Mayhar va_end(args); 553273df556SFrank Mayhar 554273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 555273df556SFrank Mayhar } 556273df556SFrank Mayhar 557617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 558ac27a0ecSDave Kleikamp char nbuf[16]) 559ac27a0ecSDave Kleikamp { 560ac27a0ecSDave Kleikamp char *errstr = NULL; 561ac27a0ecSDave Kleikamp 562ac27a0ecSDave Kleikamp switch (errno) { 563ac27a0ecSDave Kleikamp case -EIO: 564ac27a0ecSDave Kleikamp errstr = "IO failure"; 565ac27a0ecSDave Kleikamp break; 566ac27a0ecSDave Kleikamp case -ENOMEM: 567ac27a0ecSDave Kleikamp errstr = "Out of memory"; 568ac27a0ecSDave Kleikamp break; 569ac27a0ecSDave Kleikamp case -EROFS: 57078f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 57178f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 572ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 573ac27a0ecSDave Kleikamp else 574ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 575ac27a0ecSDave Kleikamp break; 576ac27a0ecSDave Kleikamp default: 577ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 578ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 579ac27a0ecSDave Kleikamp * NULL. */ 580ac27a0ecSDave Kleikamp if (nbuf) { 581ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 582ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 583ac27a0ecSDave Kleikamp errstr = nbuf; 584ac27a0ecSDave Kleikamp } 585ac27a0ecSDave Kleikamp break; 586ac27a0ecSDave Kleikamp } 587ac27a0ecSDave Kleikamp 588ac27a0ecSDave Kleikamp return errstr; 589ac27a0ecSDave Kleikamp } 590ac27a0ecSDave Kleikamp 591617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 592ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 593ac27a0ecSDave Kleikamp 594c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 595c398eda0STheodore Ts'o unsigned int line, int errno) 596ac27a0ecSDave Kleikamp { 597ac27a0ecSDave Kleikamp char nbuf[16]; 598ac27a0ecSDave Kleikamp const char *errstr; 599ac27a0ecSDave Kleikamp 600ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 601ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 602ac27a0ecSDave Kleikamp * an error. */ 603ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 604ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 605ac27a0ecSDave Kleikamp return; 606ac27a0ecSDave Kleikamp 607617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 608c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 609c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 6101c13d5c0STheodore Ts'o save_error_info(sb, function, line); 611ac27a0ecSDave Kleikamp 612617ba13bSMingming Cao ext4_handle_error(sb); 613ac27a0ecSDave Kleikamp } 614ac27a0ecSDave Kleikamp 615ac27a0ecSDave Kleikamp /* 616617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 617ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 618ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 619ac27a0ecSDave Kleikamp * 620ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 621ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 622ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 623ac27a0ecSDave Kleikamp */ 624ac27a0ecSDave Kleikamp 625c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 626c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 627ac27a0ecSDave Kleikamp { 628ac27a0ecSDave Kleikamp va_list args; 629ac27a0ecSDave Kleikamp 6301c13d5c0STheodore Ts'o save_error_info(sb, function, line); 631ac27a0ecSDave Kleikamp va_start(args, fmt); 632c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 633c398eda0STheodore Ts'o function, line); 634ac27a0ecSDave Kleikamp vprintk(fmt, args); 635ac27a0ecSDave Kleikamp printk("\n"); 636ac27a0ecSDave Kleikamp va_end(args); 637ac27a0ecSDave Kleikamp 6381c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 639b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 640ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 6414ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 642ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 643dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 6441c13d5c0STheodore Ts'o save_error_info(sb, function, line); 6451c13d5c0STheodore Ts'o } 6461c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 6471c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 648ac27a0ecSDave Kleikamp } 649ac27a0ecSDave Kleikamp 6500ff2ea7dSJoe Perches void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) 651b31e1552SEric Sandeen { 6520ff2ea7dSJoe Perches struct va_format vaf; 653b31e1552SEric Sandeen va_list args; 654b31e1552SEric Sandeen 655b31e1552SEric Sandeen va_start(args, fmt); 6560ff2ea7dSJoe Perches vaf.fmt = fmt; 6570ff2ea7dSJoe Perches vaf.va = &args; 6580ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 659b31e1552SEric Sandeen va_end(args); 660b31e1552SEric Sandeen } 661b31e1552SEric Sandeen 66212062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 663c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 664ac27a0ecSDave Kleikamp { 6650ff2ea7dSJoe Perches struct va_format vaf; 666ac27a0ecSDave Kleikamp va_list args; 667ac27a0ecSDave Kleikamp 668ac27a0ecSDave Kleikamp va_start(args, fmt); 6690ff2ea7dSJoe Perches vaf.fmt = fmt; 6700ff2ea7dSJoe Perches vaf.va = &args; 6710ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6720ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 673ac27a0ecSDave Kleikamp va_end(args); 674ac27a0ecSDave Kleikamp } 675ac27a0ecSDave Kleikamp 676e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 677e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 678e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 679e29136f8STheodore Ts'o const char *fmt, ...) 6805d1b1b3fSAneesh Kumar K.V __releases(bitlock) 6815d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 6825d1b1b3fSAneesh Kumar K.V { 6830ff2ea7dSJoe Perches struct va_format vaf; 6845d1b1b3fSAneesh Kumar K.V va_list args; 6855d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 6865d1b1b3fSAneesh Kumar K.V 6871c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 6881c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 6891c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 6900ff2ea7dSJoe Perches 6915d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 6920ff2ea7dSJoe Perches 6930ff2ea7dSJoe Perches vaf.fmt = fmt; 6940ff2ea7dSJoe Perches vaf.va = &args; 69521149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 696e29136f8STheodore Ts'o sb->s_id, function, line, grp); 697e29136f8STheodore Ts'o if (ino) 6980ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 699e29136f8STheodore Ts'o if (block) 7000ff2ea7dSJoe Perches printk(KERN_CONT "block %llu:", (unsigned long long) block); 7010ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 7025d1b1b3fSAneesh Kumar K.V va_end(args); 7035d1b1b3fSAneesh Kumar K.V 7045d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 705e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 7065d1b1b3fSAneesh Kumar K.V return; 7075d1b1b3fSAneesh Kumar K.V } 7081c13d5c0STheodore Ts'o 7095d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 7105d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 7115d1b1b3fSAneesh Kumar K.V /* 7125d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 7135d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 7145d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 7155d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 7165d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 71725985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 7185d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 7195d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 7205d1b1b3fSAneesh Kumar K.V * more appropriate error code. 7215d1b1b3fSAneesh Kumar K.V */ 7225d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 7235d1b1b3fSAneesh Kumar K.V return; 7245d1b1b3fSAneesh Kumar K.V } 7255d1b1b3fSAneesh Kumar K.V 726617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 727ac27a0ecSDave Kleikamp { 728617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 729ac27a0ecSDave Kleikamp 730617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 731ac27a0ecSDave Kleikamp return; 732ac27a0ecSDave Kleikamp 73312062dddSEric Sandeen ext4_warning(sb, 734ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 735ac27a0ecSDave Kleikamp "running e2fsck is recommended", 736617ba13bSMingming Cao EXT4_DYNAMIC_REV); 737ac27a0ecSDave Kleikamp 738617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 739617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 740617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 741ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 742ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 743ac27a0ecSDave Kleikamp 744ac27a0ecSDave Kleikamp /* 745ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 746ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 747ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 748ac27a0ecSDave Kleikamp */ 749ac27a0ecSDave Kleikamp } 750ac27a0ecSDave Kleikamp 751ac27a0ecSDave Kleikamp /* 752ac27a0ecSDave Kleikamp * Open the external journal device 753ac27a0ecSDave Kleikamp */ 754b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 755ac27a0ecSDave Kleikamp { 756ac27a0ecSDave Kleikamp struct block_device *bdev; 757ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 758ac27a0ecSDave Kleikamp 759d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 760ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 761ac27a0ecSDave Kleikamp goto fail; 762ac27a0ecSDave Kleikamp return bdev; 763ac27a0ecSDave Kleikamp 764ac27a0ecSDave Kleikamp fail: 765b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 766ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 767ac27a0ecSDave Kleikamp return NULL; 768ac27a0ecSDave Kleikamp } 769ac27a0ecSDave Kleikamp 770ac27a0ecSDave Kleikamp /* 771ac27a0ecSDave Kleikamp * Release the journal device 772ac27a0ecSDave Kleikamp */ 773617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 774ac27a0ecSDave Kleikamp { 775e525fd89STejun Heo return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 776ac27a0ecSDave Kleikamp } 777ac27a0ecSDave Kleikamp 778617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 779ac27a0ecSDave Kleikamp { 780ac27a0ecSDave Kleikamp struct block_device *bdev; 781ac27a0ecSDave Kleikamp int ret = -ENODEV; 782ac27a0ecSDave Kleikamp 783ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 784ac27a0ecSDave Kleikamp if (bdev) { 785617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 786ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 787ac27a0ecSDave Kleikamp } 788ac27a0ecSDave Kleikamp return ret; 789ac27a0ecSDave Kleikamp } 790ac27a0ecSDave Kleikamp 791ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 792ac27a0ecSDave Kleikamp { 793617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 794ac27a0ecSDave Kleikamp } 795ac27a0ecSDave Kleikamp 796617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 797ac27a0ecSDave Kleikamp { 798ac27a0ecSDave Kleikamp struct list_head *l; 799ac27a0ecSDave Kleikamp 800b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 801ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 802ac27a0ecSDave Kleikamp 803ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 804ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 805ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 806ac27a0ecSDave Kleikamp printk(KERN_ERR " " 807ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 808ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 809ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 810ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 811ac27a0ecSDave Kleikamp } 812ac27a0ecSDave Kleikamp } 813ac27a0ecSDave Kleikamp 814617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 815ac27a0ecSDave Kleikamp { 816617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 817617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 818ef2cabf7SHidehiro Kawai int i, err; 819ac27a0ecSDave Kleikamp 820857ac889SLukas Czerner ext4_unregister_li_request(sb); 821e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 822e0ccfd95SChristoph Hellwig 8234c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 8244c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 8254c0425ffSMingming Cao 826a9e220f8SAl Viro lock_super(sb); 8278c85e125SChristoph Hellwig if (sb->s_dirt) 828ebc1ac16SChristoph Hellwig ext4_commit_super(sb, 1); 8298c85e125SChristoph Hellwig 8300390131bSFrank Mayhar if (sbi->s_journal) { 831ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 83247b4a50bSJan Kara sbi->s_journal = NULL; 833ef2cabf7SHidehiro Kawai if (err < 0) 834c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 8350390131bSFrank Mayhar } 836d4edac31SJosef Bacik 837a1c6c569SSergey Senozhatsky del_timer(&sbi->s_err_report); 838d4edac31SJosef Bacik ext4_release_system_zone(sb); 839d4edac31SJosef Bacik ext4_mb_release(sb); 840d4edac31SJosef Bacik ext4_ext_release(sb); 841d4edac31SJosef Bacik ext4_xattr_put_super(sb); 842d4edac31SJosef Bacik 843ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 844617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 845ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 846e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 847ac27a0ecSDave Kleikamp } 848240799cdSTheodore Ts'o if (sbi->s_proc) { 8499f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 850240799cdSTheodore Ts'o } 8513197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 852ac27a0ecSDave Kleikamp 853ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 854ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 855f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 8569933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 85757042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 858ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 859ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 86057042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 861ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 862ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 863ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 864ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 865ac27a0ecSDave Kleikamp #endif 866ac27a0ecSDave Kleikamp 867ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 868ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 869ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 870ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 871ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 872ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 873ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 874ac27a0ecSDave Kleikamp 875f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 876ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 877ac27a0ecSDave Kleikamp /* 878ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 879ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 880ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 881ac27a0ecSDave Kleikamp */ 882ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 883f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 884617ba13bSMingming Cao ext4_blkdev_remove(sbi); 885ac27a0ecSDave Kleikamp } 886c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 887c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 888ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8893197ebdbSTheodore Ts'o /* 8903197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8913197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 8923197ebdbSTheodore Ts'o */ 8933197ebdbSTheodore Ts'o unlock_super(sb); 8943197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 8953197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 896705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 897ac27a0ecSDave Kleikamp kfree(sbi); 898ac27a0ecSDave Kleikamp } 899ac27a0ecSDave Kleikamp 900e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 901ac27a0ecSDave Kleikamp 902ac27a0ecSDave Kleikamp /* 903ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 904ac27a0ecSDave Kleikamp */ 905617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 906ac27a0ecSDave Kleikamp { 907617ba13bSMingming Cao struct ext4_inode_info *ei; 908ac27a0ecSDave Kleikamp 909e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 910ac27a0ecSDave Kleikamp if (!ei) 911ac27a0ecSDave Kleikamp return NULL; 9120b8e58a1SAndreas Dilger 913ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 91491246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 915a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 916c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 917c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 918d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 919d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 920d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 9219d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 922d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 923a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 924a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 925a9e7f447SDmitry Monakhov #endif 9268aefcd55STheodore Ts'o ei->jinode = NULL; 927c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 928744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 9298d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 930b436b9beSJan Kara ei->i_sync_tid = 0; 931b436b9beSJan Kara ei->i_datasync_tid = 0; 932f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 933e9e3bcecSEric Sandeen atomic_set(&ei->i_aiodio_unwritten, 0); 9340b8e58a1SAndreas Dilger 935ac27a0ecSDave Kleikamp return &ei->vfs_inode; 936ac27a0ecSDave Kleikamp } 937ac27a0ecSDave Kleikamp 9387ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9397ff9c073STheodore Ts'o { 9407ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9417ff9c073STheodore Ts'o 9427ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9437ff9c073STheodore Ts'o return drop; 9447ff9c073STheodore Ts'o } 9457ff9c073STheodore Ts'o 946fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 947fa0d7e3dSNick Piggin { 948fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 949fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 950fa0d7e3dSNick Piggin } 951fa0d7e3dSNick Piggin 952617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 953ac27a0ecSDave Kleikamp { 9549f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 955b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 956b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 957b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9589f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9599f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9609f7dd93dSVasily Averin true); 9619f7dd93dSVasily Averin dump_stack(); 9629f7dd93dSVasily Averin } 963fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 964ac27a0ecSDave Kleikamp } 965ac27a0ecSDave Kleikamp 96651cc5068SAlexey Dobriyan static void init_once(void *foo) 967ac27a0ecSDave Kleikamp { 968617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 969ac27a0ecSDave Kleikamp 970ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 97103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 972ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 973ac27a0ecSDave Kleikamp #endif 9740e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 975ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 976ac27a0ecSDave Kleikamp } 977ac27a0ecSDave Kleikamp 978ac27a0ecSDave Kleikamp static int init_inodecache(void) 979ac27a0ecSDave Kleikamp { 980617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 981617ba13bSMingming Cao sizeof(struct ext4_inode_info), 982ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 983ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 98420c2df83SPaul Mundt init_once); 985617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 986ac27a0ecSDave Kleikamp return -ENOMEM; 987ac27a0ecSDave Kleikamp return 0; 988ac27a0ecSDave Kleikamp } 989ac27a0ecSDave Kleikamp 990ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 991ac27a0ecSDave Kleikamp { 992617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 993ac27a0ecSDave Kleikamp } 994ac27a0ecSDave Kleikamp 9950930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 996ac27a0ecSDave Kleikamp { 9970930fcc1SAl Viro invalidate_inode_buffers(inode); 9980930fcc1SAl Viro end_writeback(inode); 9999f754758SChristoph Hellwig dquot_drop(inode); 1000c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 10018aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 10028aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 10038aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 10048aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 10058aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 10068aefcd55STheodore Ts'o } 1007ac27a0ecSDave Kleikamp } 1008ac27a0ecSDave Kleikamp 10092b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 10102b2d6d01STheodore Ts'o struct super_block *sb) 1011ac27a0ecSDave Kleikamp { 1012ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 1013617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1014ac27a0ecSDave Kleikamp 10155a20bdfcSJan Kara if (sbi->s_jquota_fmt) { 10165a20bdfcSJan Kara char *fmtname = ""; 10175a20bdfcSJan Kara 10185a20bdfcSJan Kara switch (sbi->s_jquota_fmt) { 10195a20bdfcSJan Kara case QFMT_VFS_OLD: 10205a20bdfcSJan Kara fmtname = "vfsold"; 10215a20bdfcSJan Kara break; 10225a20bdfcSJan Kara case QFMT_VFS_V0: 10235a20bdfcSJan Kara fmtname = "vfsv0"; 10245a20bdfcSJan Kara break; 10255a20bdfcSJan Kara case QFMT_VFS_V1: 10265a20bdfcSJan Kara fmtname = "vfsv1"; 10275a20bdfcSJan Kara break; 10285a20bdfcSJan Kara } 10295a20bdfcSJan Kara seq_printf(seq, ",jqfmt=%s", fmtname); 10305a20bdfcSJan Kara } 1031ac27a0ecSDave Kleikamp 1032ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 1033ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 1034ac27a0ecSDave Kleikamp 1035ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 1036ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 1037ac27a0ecSDave Kleikamp 1038482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA)) 1039ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 1040ac27a0ecSDave Kleikamp 1041482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA)) 1042ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 1043ac27a0ecSDave Kleikamp #endif 1044ac27a0ecSDave Kleikamp } 1045ac27a0ecSDave Kleikamp 1046d9c9bef1SMiklos Szeredi /* 1047d9c9bef1SMiklos Szeredi * Show an option if 1048d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 1049d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 1050d9c9bef1SMiklos Szeredi */ 105134c80b1dSAl Viro static int ext4_show_options(struct seq_file *seq, struct dentry *root) 1052ac27a0ecSDave Kleikamp { 1053aa22df2cSAneesh Kumar K.V int def_errors; 1054aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 105534c80b1dSAl Viro struct super_block *sb = root->d_sb; 1056d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 1057d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 1058d9c9bef1SMiklos Szeredi 1059d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 1060aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 1061d9c9bef1SMiklos Szeredi 1062d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 1063d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 1064d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 1065d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 1066aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 1067d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 1068d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 1069d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 1070d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 1071d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 1072d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 1073d9c9bef1SMiklos Szeredi } 1074d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 1075d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 1076d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 1077d9c9bef1SMiklos Szeredi } 1078bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 1079d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 1080bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 1081d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 1082bb4f397aSAneesh Kumar K.V } 1083bb4f397aSAneesh Kumar K.V } 1084aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 1085bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 1086aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 1087d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 1088aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 1089d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 1090aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 1091d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 109203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1093ea663336SEric Sandeen if (test_opt(sb, XATTR_USER)) 1094d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 1095ea663336SEric Sandeen if (!test_opt(sb, XATTR_USER)) 1096d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 1097d9c9bef1SMiklos Szeredi #endif 109803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1099aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 1100d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 1101d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 1102d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 1103d9c9bef1SMiklos Szeredi #endif 110430773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 1105d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 1106d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 1107d9c9bef1SMiklos Szeredi } 110830773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 110930773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 111030773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 111130773840STheodore Ts'o } 111230773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 111330773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 11141d526fc9SBen Hutchings (unsigned) sbi->s_max_batch_time); 111530773840STheodore Ts'o } 111630773840STheodore Ts'o 1117571640caSEric Sandeen /* 1118571640caSEric Sandeen * We're changing the default of barrier mount option, so 1119571640caSEric Sandeen * let's always display its mount state so it's clear what its 1120571640caSEric Sandeen * status is. 1121571640caSEric Sandeen */ 1122571640caSEric Sandeen seq_puts(seq, ",barrier="); 1123571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 1124cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 1125cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 112639a4badeSJan Kara else if (test_opt(sb, JOURNAL_CHECKSUM)) 112739a4badeSJan Kara seq_puts(seq, ",journal_checksum"); 112825ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 112925ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 11308b67f04aSTheodore Ts'o if (!test_opt(sb, DELALLOC) && 11318b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_NODELALLOC)) 1132dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 1133dd919b98SAneesh Kumar K.V 11346fd7a467STheodore Ts'o if (!test_opt(sb, MBLK_IO_SUBMIT)) 11356fd7a467STheodore Ts'o seq_puts(seq, ",nomblk_io_submit"); 1136cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 1137cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 1138aa22df2cSAneesh Kumar K.V /* 1139aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 1140aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 1141aa22df2cSAneesh Kumar K.V */ 1142617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 1143ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 1144617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 1145ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 1146617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 1147ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 1148ac27a0ecSDave Kleikamp 1149240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 1150240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 1151240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 1152240799cdSTheodore Ts'o 11535bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 11545bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 11555bf5683aSHidehiro Kawai 1156afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 115706705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 1158afd4672dSTheodore Ts'o 11598b67f04aSTheodore Ts'o if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) 11605328e635SEric Sandeen seq_puts(seq, ",discard"); 11615328e635SEric Sandeen 1162e3bb52aeSEric Sandeen if (test_opt(sb, NOLOAD)) 1163e3bb52aeSEric Sandeen seq_puts(seq, ",norecovery"); 1164e3bb52aeSEric Sandeen 1165744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) 1166744692dcSJiaying Zhang seq_puts(seq, ",dioread_nolock"); 1167744692dcSJiaying Zhang 11688b67f04aSTheodore Ts'o if (test_opt(sb, BLOCK_VALIDITY) && 11698b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) 11708b67f04aSTheodore Ts'o seq_puts(seq, ",block_validity"); 11718b67f04aSTheodore Ts'o 1172bfff6873SLukas Czerner if (!test_opt(sb, INIT_INODE_TABLE)) 1173fc6cb1cdSTheodore Ts'o seq_puts(seq, ",noinit_itable"); 117451ce6511SLukas Czerner else if (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT) 1175fc6cb1cdSTheodore Ts'o seq_printf(seq, ",init_itable=%u", 1176bfff6873SLukas Czerner (unsigned) sbi->s_li_wait_mult); 1177bfff6873SLukas Czerner 1178617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 11790b8e58a1SAndreas Dilger 1180ac27a0ecSDave Kleikamp return 0; 1181ac27a0ecSDave Kleikamp } 1182ac27a0ecSDave Kleikamp 11831b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 11841b961ac0SChristoph Hellwig u64 ino, u32 generation) 1185ac27a0ecSDave Kleikamp { 1186ac27a0ecSDave Kleikamp struct inode *inode; 1187ac27a0ecSDave Kleikamp 1188617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1189ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1190617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1191ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1192ac27a0ecSDave Kleikamp 1193ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1194ac27a0ecSDave Kleikamp * 1195617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1196ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1197ac27a0ecSDave Kleikamp * 1198ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1199ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1200ac27a0ecSDave Kleikamp */ 12011d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 12021d1fe1eeSDavid Howells if (IS_ERR(inode)) 12031d1fe1eeSDavid Howells return ERR_CAST(inode); 12041d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1205ac27a0ecSDave Kleikamp iput(inode); 1206ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1207ac27a0ecSDave Kleikamp } 12081b961ac0SChristoph Hellwig 12091b961ac0SChristoph Hellwig return inode; 1210ac27a0ecSDave Kleikamp } 12111b961ac0SChristoph Hellwig 12121b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 12131b961ac0SChristoph Hellwig int fh_len, int fh_type) 12141b961ac0SChristoph Hellwig { 12151b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 12161b961ac0SChristoph Hellwig ext4_nfs_get_inode); 12171b961ac0SChristoph Hellwig } 12181b961ac0SChristoph Hellwig 12191b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 12201b961ac0SChristoph Hellwig int fh_len, int fh_type) 12211b961ac0SChristoph Hellwig { 12221b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 12231b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1224ac27a0ecSDave Kleikamp } 1225ac27a0ecSDave Kleikamp 1226c39a7f84SToshiyuki Okajima /* 1227c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1228c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1229c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1230c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1231c39a7f84SToshiyuki Okajima */ 12320b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 12330b8e58a1SAndreas Dilger gfp_t wait) 1234c39a7f84SToshiyuki Okajima { 1235c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1236c39a7f84SToshiyuki Okajima 1237c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1238c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1239c39a7f84SToshiyuki Okajima return 0; 1240c39a7f84SToshiyuki Okajima if (journal) 1241c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1242c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1243c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1244c39a7f84SToshiyuki Okajima } 1245c39a7f84SToshiyuki Okajima 1246ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1247ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1248ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1249ac27a0ecSDave Kleikamp 1250617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1251617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1252617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1253617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1254617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 12556f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1256f00c9e44SJan Kara struct path *path); 1257ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1258617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1259617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1260ac27a0ecSDave Kleikamp size_t len, loff_t off); 1261617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1262ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1263ac27a0ecSDave Kleikamp 126461e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 126560e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1266617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1267617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1268617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1269617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1270a5b5ee32SJan Kara .write_info = ext4_write_info, 1271a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1272a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1273ac27a0ecSDave Kleikamp }; 1274ac27a0ecSDave Kleikamp 12750d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1276617ba13bSMingming Cao .quota_on = ext4_quota_on, 1277ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1278287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1279287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1280287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1281287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1282287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1283ac27a0ecSDave Kleikamp }; 1284ac27a0ecSDave Kleikamp #endif 1285ac27a0ecSDave Kleikamp 1286ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1287617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1288617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1289617ba13bSMingming Cao .write_inode = ext4_write_inode, 1290617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 12917ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 12920930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1293617ba13bSMingming Cao .put_super = ext4_put_super, 1294617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1295c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1296c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1297617ba13bSMingming Cao .statfs = ext4_statfs, 1298617ba13bSMingming Cao .remount_fs = ext4_remount, 1299617ba13bSMingming Cao .show_options = ext4_show_options, 1300ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1301617ba13bSMingming Cao .quota_read = ext4_quota_read, 1302617ba13bSMingming Cao .quota_write = ext4_quota_write, 1303ac27a0ecSDave Kleikamp #endif 1304c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1305ac27a0ecSDave Kleikamp }; 1306ac27a0ecSDave Kleikamp 13079ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 13089ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 13099ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 13109ca92389STheodore Ts'o .write_inode = ext4_write_inode, 13119ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 13127ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 13130930fcc1SAl Viro .evict_inode = ext4_evict_inode, 13149ca92389STheodore Ts'o .write_super = ext4_write_super, 13159ca92389STheodore Ts'o .put_super = ext4_put_super, 13169ca92389STheodore Ts'o .statfs = ext4_statfs, 13179ca92389STheodore Ts'o .remount_fs = ext4_remount, 13189ca92389STheodore Ts'o .show_options = ext4_show_options, 13199ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 13209ca92389STheodore Ts'o .quota_read = ext4_quota_read, 13219ca92389STheodore Ts'o .quota_write = ext4_quota_write, 13229ca92389STheodore Ts'o #endif 13239ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 13249ca92389STheodore Ts'o }; 13259ca92389STheodore Ts'o 132639655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 13271b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 13281b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1329617ba13bSMingming Cao .get_parent = ext4_get_parent, 1330ac27a0ecSDave Kleikamp }; 1331ac27a0ecSDave Kleikamp 1332ac27a0ecSDave Kleikamp enum { 1333ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1334ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 133501436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1336ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 133706705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 133830773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1339c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1340818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1341ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1342296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1343ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 13445a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 13455a20bdfcSJan Kara Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, 13465a20bdfcSJan Kara Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, 13471449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 13481449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 13495328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1350744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1351fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1352ac27a0ecSDave Kleikamp }; 1353ac27a0ecSDave Kleikamp 1354a447c093SSteven Whitehouse static const match_table_t tokens = { 1355ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1356ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1357ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1358ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1359ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1360ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1361ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1362ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1363ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1364ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1365ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1366ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1367ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1368ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1369ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1370ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1371ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1372ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1373ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1374ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1375ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1376e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 1377ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1378ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1379ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 138030773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 138130773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1382ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1383ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1384818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1385818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1386ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1387ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1388ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1389ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 13905bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 13915bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1392ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1393ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1394ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1395ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1396ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1397ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 13985a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1399ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1400ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1401ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1402ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1403ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 140406705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 140506705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 140625ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1407c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1408ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 140964769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1410dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 14111449032bSTheodore Ts'o {Opt_mblk_io_submit, "mblk_io_submit"}, 14121449032bSTheodore Ts'o {Opt_nomblk_io_submit, "nomblk_io_submit"}, 14136fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 14146fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1415240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1416b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1417afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 141806705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 141906705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1420744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1421744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 14225328e635SEric Sandeen {Opt_discard, "discard"}, 14235328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1424fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1425fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1426fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1427f3f12faaSJosef Bacik {Opt_err, NULL}, 1428ac27a0ecSDave Kleikamp }; 1429ac27a0ecSDave Kleikamp 1430617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1431ac27a0ecSDave Kleikamp { 1432617ba13bSMingming Cao ext4_fsblk_t sb_block; 1433ac27a0ecSDave Kleikamp char *options = (char *) *data; 1434ac27a0ecSDave Kleikamp 1435ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1436ac27a0ecSDave Kleikamp return 1; /* Default location */ 14370b8e58a1SAndreas Dilger 1438ac27a0ecSDave Kleikamp options += 3; 14390b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1440ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1441ac27a0ecSDave Kleikamp if (*options && *options != ',') { 14424776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1443ac27a0ecSDave Kleikamp (char *) *data); 1444ac27a0ecSDave Kleikamp return 1; 1445ac27a0ecSDave Kleikamp } 1446ac27a0ecSDave Kleikamp if (*options == ',') 1447ac27a0ecSDave Kleikamp options++; 1448ac27a0ecSDave Kleikamp *data = (void *) options; 14490b8e58a1SAndreas Dilger 1450ac27a0ecSDave Kleikamp return sb_block; 1451ac27a0ecSDave Kleikamp } 1452ac27a0ecSDave Kleikamp 1453b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1454437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1455437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1456b3881f74STheodore Ts'o 145756c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 145856c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 145956c50f11SDmitry Monakhov { 146056c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 146156c50f11SDmitry Monakhov char *qname; 146256c50f11SDmitry Monakhov 146356c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 146456c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 146556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 146656c50f11SDmitry Monakhov "Cannot change journaled " 146756c50f11SDmitry Monakhov "quota options when quota turned on"); 146856c50f11SDmitry Monakhov return 0; 146956c50f11SDmitry Monakhov } 147056c50f11SDmitry Monakhov qname = match_strdup(args); 147156c50f11SDmitry Monakhov if (!qname) { 147256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 147356c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 147456c50f11SDmitry Monakhov return 0; 147556c50f11SDmitry Monakhov } 147656c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 147756c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 147856c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 147956c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 148056c50f11SDmitry Monakhov kfree(qname); 148156c50f11SDmitry Monakhov return 0; 148256c50f11SDmitry Monakhov } 148356c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 148456c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 148556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 148656c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 148756c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 148856c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 148956c50f11SDmitry Monakhov return 0; 149056c50f11SDmitry Monakhov } 1491fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 149256c50f11SDmitry Monakhov return 1; 149356c50f11SDmitry Monakhov } 149456c50f11SDmitry Monakhov 149556c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 149656c50f11SDmitry Monakhov { 149756c50f11SDmitry Monakhov 149856c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 149956c50f11SDmitry Monakhov 150056c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 150156c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 150256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 150356c50f11SDmitry Monakhov " when quota turned on"); 150456c50f11SDmitry Monakhov return 0; 150556c50f11SDmitry Monakhov } 150656c50f11SDmitry Monakhov /* 150756c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 150856c50f11SDmitry Monakhov * to be correct 150956c50f11SDmitry Monakhov */ 151056c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 151156c50f11SDmitry Monakhov return 1; 151256c50f11SDmitry Monakhov } 151356c50f11SDmitry Monakhov #endif 151456c50f11SDmitry Monakhov 1515ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1516c3191067STheodore Ts'o unsigned long *journal_devnum, 1517b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1518617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1519ac27a0ecSDave Kleikamp { 1520617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1521ac27a0ecSDave Kleikamp char *p; 1522ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1523ac27a0ecSDave Kleikamp int data_opt = 0; 1524ac27a0ecSDave Kleikamp int option; 1525ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 152656c50f11SDmitry Monakhov int qfmt; 1527ac27a0ecSDave Kleikamp #endif 1528ac27a0ecSDave Kleikamp 1529ac27a0ecSDave Kleikamp if (!options) 1530ac27a0ecSDave Kleikamp return 1; 1531ac27a0ecSDave Kleikamp 1532ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1533ac27a0ecSDave Kleikamp int token; 1534ac27a0ecSDave Kleikamp if (!*p) 1535ac27a0ecSDave Kleikamp continue; 1536ac27a0ecSDave Kleikamp 153715121c18SEric Sandeen /* 153815121c18SEric Sandeen * Initialize args struct so we know whether arg was 153915121c18SEric Sandeen * found; some options take optional arguments. 154015121c18SEric Sandeen */ 15417dc57615SPeter Huewe args[0].to = args[0].from = NULL; 1542ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1543ac27a0ecSDave Kleikamp switch (token) { 1544ac27a0ecSDave Kleikamp case Opt_bsd_df: 1545437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1546fd8c37ecSTheodore Ts'o clear_opt(sb, MINIX_DF); 1547ac27a0ecSDave Kleikamp break; 1548ac27a0ecSDave Kleikamp case Opt_minix_df: 1549437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1550fd8c37ecSTheodore Ts'o set_opt(sb, MINIX_DF); 1551437ca0fdSDmitry Monakhov 1552ac27a0ecSDave Kleikamp break; 1553ac27a0ecSDave Kleikamp case Opt_grpid: 1554437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1555fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 1556437ca0fdSDmitry Monakhov 1557ac27a0ecSDave Kleikamp break; 1558ac27a0ecSDave Kleikamp case Opt_nogrpid: 1559437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1560fd8c37ecSTheodore Ts'o clear_opt(sb, GRPID); 1561437ca0fdSDmitry Monakhov 1562ac27a0ecSDave Kleikamp break; 1563ac27a0ecSDave Kleikamp case Opt_resuid: 1564ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1565ac27a0ecSDave Kleikamp return 0; 1566ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1567ac27a0ecSDave Kleikamp break; 1568ac27a0ecSDave Kleikamp case Opt_resgid: 1569ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1570ac27a0ecSDave Kleikamp return 0; 1571ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1572ac27a0ecSDave Kleikamp break; 1573ac27a0ecSDave Kleikamp case Opt_sb: 1574ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1575ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1576ac27a0ecSDave Kleikamp break; 1577ac27a0ecSDave Kleikamp case Opt_err_panic: 1578fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_CONT); 1579fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_RO); 1580fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 1581ac27a0ecSDave Kleikamp break; 1582ac27a0ecSDave Kleikamp case Opt_err_ro: 1583fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_CONT); 1584fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_PANIC); 1585fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 1586ac27a0ecSDave Kleikamp break; 1587ac27a0ecSDave Kleikamp case Opt_err_cont: 1588fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_RO); 1589fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_PANIC); 1590fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 1591ac27a0ecSDave Kleikamp break; 1592ac27a0ecSDave Kleikamp case Opt_nouid32: 1593fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 1594ac27a0ecSDave Kleikamp break; 1595ac27a0ecSDave Kleikamp case Opt_debug: 1596fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 1597ac27a0ecSDave Kleikamp break; 1598ac27a0ecSDave Kleikamp case Opt_oldalloc: 15994113c4caSLukas Czerner ext4_msg(sb, KERN_WARNING, 16004113c4caSLukas Czerner "Ignoring deprecated oldalloc option"); 1601ac27a0ecSDave Kleikamp break; 1602ac27a0ecSDave Kleikamp case Opt_orlov: 16034113c4caSLukas Czerner ext4_msg(sb, KERN_WARNING, 16044113c4caSLukas Czerner "Ignoring deprecated orlov option"); 1605ac27a0ecSDave Kleikamp break; 160603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1607ac27a0ecSDave Kleikamp case Opt_user_xattr: 1608fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 1609ac27a0ecSDave Kleikamp break; 1610ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1611fd8c37ecSTheodore Ts'o clear_opt(sb, XATTR_USER); 1612ac27a0ecSDave Kleikamp break; 1613ac27a0ecSDave Kleikamp #else 1614ac27a0ecSDave Kleikamp case Opt_user_xattr: 1615ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1616b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1617ac27a0ecSDave Kleikamp break; 1618ac27a0ecSDave Kleikamp #endif 161903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1620ac27a0ecSDave Kleikamp case Opt_acl: 1621fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 1622ac27a0ecSDave Kleikamp break; 1623ac27a0ecSDave Kleikamp case Opt_noacl: 1624fd8c37ecSTheodore Ts'o clear_opt(sb, POSIX_ACL); 1625ac27a0ecSDave Kleikamp break; 1626ac27a0ecSDave Kleikamp #else 1627ac27a0ecSDave Kleikamp case Opt_acl: 1628ac27a0ecSDave Kleikamp case Opt_noacl: 1629b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1630ac27a0ecSDave Kleikamp break; 1631ac27a0ecSDave Kleikamp #endif 1632ac27a0ecSDave Kleikamp case Opt_journal_update: 1633ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1634ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1635ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1636ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1637ac27a0ecSDave Kleikamp journal file. */ 1638ac27a0ecSDave Kleikamp if (is_remount) { 1639b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1640b31e1552SEric Sandeen "Cannot specify journal on remount"); 1641ac27a0ecSDave Kleikamp return 0; 1642ac27a0ecSDave Kleikamp } 1643fd8c37ecSTheodore Ts'o set_opt(sb, UPDATE_JOURNAL); 1644ac27a0ecSDave Kleikamp break; 1645ac27a0ecSDave Kleikamp case Opt_journal_dev: 1646ac27a0ecSDave Kleikamp if (is_remount) { 1647b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1648b31e1552SEric Sandeen "Cannot specify journal on remount"); 1649ac27a0ecSDave Kleikamp return 0; 1650ac27a0ecSDave Kleikamp } 1651ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1652ac27a0ecSDave Kleikamp return 0; 1653ac27a0ecSDave Kleikamp *journal_devnum = option; 1654ac27a0ecSDave Kleikamp break; 1655818d276cSGirish Shilamkar case Opt_journal_checksum: 1656fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_CHECKSUM); 1657d4da6c9cSLinus Torvalds break; 1658818d276cSGirish Shilamkar case Opt_journal_async_commit: 1659fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_ASYNC_COMMIT); 1660fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_CHECKSUM); 1661818d276cSGirish Shilamkar break; 1662ac27a0ecSDave Kleikamp case Opt_noload: 1663fd8c37ecSTheodore Ts'o set_opt(sb, NOLOAD); 1664ac27a0ecSDave Kleikamp break; 1665ac27a0ecSDave Kleikamp case Opt_commit: 1666ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1667ac27a0ecSDave Kleikamp return 0; 1668ac27a0ecSDave Kleikamp if (option < 0) 1669ac27a0ecSDave Kleikamp return 0; 1670ac27a0ecSDave Kleikamp if (option == 0) 1671cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1672ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1673ac27a0ecSDave Kleikamp break; 167430773840STheodore Ts'o case Opt_max_batch_time: 167530773840STheodore Ts'o if (match_int(&args[0], &option)) 167630773840STheodore Ts'o return 0; 167730773840STheodore Ts'o if (option < 0) 167830773840STheodore Ts'o return 0; 167930773840STheodore Ts'o if (option == 0) 168030773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 168130773840STheodore Ts'o sbi->s_max_batch_time = option; 168230773840STheodore Ts'o break; 168330773840STheodore Ts'o case Opt_min_batch_time: 168430773840STheodore Ts'o if (match_int(&args[0], &option)) 168530773840STheodore Ts'o return 0; 168630773840STheodore Ts'o if (option < 0) 168730773840STheodore Ts'o return 0; 168830773840STheodore Ts'o sbi->s_min_batch_time = option; 168930773840STheodore Ts'o break; 1690ac27a0ecSDave Kleikamp case Opt_data_journal: 1691617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1692ac27a0ecSDave Kleikamp goto datacheck; 1693ac27a0ecSDave Kleikamp case Opt_data_ordered: 1694617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1695ac27a0ecSDave Kleikamp goto datacheck; 1696ac27a0ecSDave Kleikamp case Opt_data_writeback: 1697617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1698ac27a0ecSDave Kleikamp datacheck: 1699ac27a0ecSDave Kleikamp if (is_remount) { 1700eb513689STheodore Ts'o if (!sbi->s_journal) 1701eb513689STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 1702eb513689STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) != data_opt) { 1703b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1704b31e1552SEric Sandeen "Cannot change data mode on remount"); 1705ac27a0ecSDave Kleikamp return 0; 1706ac27a0ecSDave Kleikamp } 1707ac27a0ecSDave Kleikamp } else { 1708fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 1709ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1710ac27a0ecSDave Kleikamp } 1711ac27a0ecSDave Kleikamp break; 17125bf5683aSHidehiro Kawai case Opt_data_err_abort: 1713fd8c37ecSTheodore Ts'o set_opt(sb, DATA_ERR_ABORT); 17145bf5683aSHidehiro Kawai break; 17155bf5683aSHidehiro Kawai case Opt_data_err_ignore: 1716fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_ERR_ABORT); 17175bf5683aSHidehiro Kawai break; 1718ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1719ac27a0ecSDave Kleikamp case Opt_usrjquota: 172056c50f11SDmitry Monakhov if (!set_qf_name(sb, USRQUOTA, &args[0])) 172156c50f11SDmitry Monakhov return 0; 172256c50f11SDmitry Monakhov break; 1723ac27a0ecSDave Kleikamp case Opt_grpjquota: 172456c50f11SDmitry Monakhov if (!set_qf_name(sb, GRPQUOTA, &args[0])) 1725ac27a0ecSDave Kleikamp return 0; 1726ac27a0ecSDave Kleikamp break; 1727ac27a0ecSDave Kleikamp case Opt_offusrjquota: 172856c50f11SDmitry Monakhov if (!clear_qf_name(sb, USRQUOTA)) 1729ac27a0ecSDave Kleikamp return 0; 1730ac27a0ecSDave Kleikamp break; 173156c50f11SDmitry Monakhov case Opt_offgrpjquota: 173256c50f11SDmitry Monakhov if (!clear_qf_name(sb, GRPQUOTA)) 173356c50f11SDmitry Monakhov return 0; 173456c50f11SDmitry Monakhov break; 173556c50f11SDmitry Monakhov 1736ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1737dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1738dfc5d03fSJan Kara goto set_qf_format; 1739ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1740dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 17415a20bdfcSJan Kara goto set_qf_format; 17425a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 17435a20bdfcSJan Kara qfmt = QFMT_VFS_V1; 1744dfc5d03fSJan Kara set_qf_format: 174517bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1746dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1747b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1748dfc5d03fSJan Kara "journaled quota options when " 1749b31e1552SEric Sandeen "quota turned on"); 1750dfc5d03fSJan Kara return 0; 1751dfc5d03fSJan Kara } 1752dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1753ac27a0ecSDave Kleikamp break; 1754ac27a0ecSDave Kleikamp case Opt_quota: 1755ac27a0ecSDave Kleikamp case Opt_usrquota: 1756fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 1757fd8c37ecSTheodore Ts'o set_opt(sb, USRQUOTA); 1758ac27a0ecSDave Kleikamp break; 1759ac27a0ecSDave Kleikamp case Opt_grpquota: 1760fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 1761fd8c37ecSTheodore Ts'o set_opt(sb, GRPQUOTA); 1762ac27a0ecSDave Kleikamp break; 1763ac27a0ecSDave Kleikamp case Opt_noquota: 176417bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1765b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1766b31e1552SEric Sandeen "options when quota turned on"); 1767ac27a0ecSDave Kleikamp return 0; 1768ac27a0ecSDave Kleikamp } 1769fd8c37ecSTheodore Ts'o clear_opt(sb, QUOTA); 1770fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1771fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1772ac27a0ecSDave Kleikamp break; 1773ac27a0ecSDave Kleikamp #else 1774ac27a0ecSDave Kleikamp case Opt_quota: 1775ac27a0ecSDave Kleikamp case Opt_usrquota: 1776ac27a0ecSDave Kleikamp case Opt_grpquota: 1777b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1778b31e1552SEric Sandeen "quota options not supported"); 1779cd59e7b9SJan Kara break; 1780ac27a0ecSDave Kleikamp case Opt_usrjquota: 1781ac27a0ecSDave Kleikamp case Opt_grpjquota: 1782ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1783ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1784ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1785ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 17865a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 1787b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1788b31e1552SEric Sandeen "journaled quota options not supported"); 1789ac27a0ecSDave Kleikamp break; 1790ac27a0ecSDave Kleikamp case Opt_noquota: 1791ac27a0ecSDave Kleikamp break; 1792ac27a0ecSDave Kleikamp #endif 1793ac27a0ecSDave Kleikamp case Opt_abort: 17944ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1795ac27a0ecSDave Kleikamp break; 179606705bffSTheodore Ts'o case Opt_nobarrier: 1797fd8c37ecSTheodore Ts'o clear_opt(sb, BARRIER); 179806705bffSTheodore Ts'o break; 1799ac27a0ecSDave Kleikamp case Opt_barrier: 180015121c18SEric Sandeen if (args[0].from) { 180115121c18SEric Sandeen if (match_int(&args[0], &option)) 180215121c18SEric Sandeen return 0; 180315121c18SEric Sandeen } else 180415121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1805ac27a0ecSDave Kleikamp if (option) 1806fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 1807ac27a0ecSDave Kleikamp else 1808fd8c37ecSTheodore Ts'o clear_opt(sb, BARRIER); 1809ac27a0ecSDave Kleikamp break; 1810ac27a0ecSDave Kleikamp case Opt_ignore: 1811ac27a0ecSDave Kleikamp break; 1812ac27a0ecSDave Kleikamp case Opt_resize: 1813ac27a0ecSDave Kleikamp if (!is_remount) { 1814b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1815b31e1552SEric Sandeen "resize option only available " 1816b31e1552SEric Sandeen "for remount"); 1817ac27a0ecSDave Kleikamp return 0; 1818ac27a0ecSDave Kleikamp } 1819ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1820ac27a0ecSDave Kleikamp return 0; 1821ac27a0ecSDave Kleikamp *n_blocks_count = option; 1822ac27a0ecSDave Kleikamp break; 1823ac27a0ecSDave Kleikamp case Opt_nobh: 1824206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1825206f7ab4SChristoph Hellwig "Ignoring deprecated nobh option"); 1826ac27a0ecSDave Kleikamp break; 1827ac27a0ecSDave Kleikamp case Opt_bh: 1828206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1829206f7ab4SChristoph Hellwig "Ignoring deprecated bh option"); 1830ac27a0ecSDave Kleikamp break; 183125ec56b5SJean Noel Cordenner case Opt_i_version: 1832fd8c37ecSTheodore Ts'o set_opt(sb, I_VERSION); 183325ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 183425ec56b5SJean Noel Cordenner break; 1835dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1836fd8c37ecSTheodore Ts'o clear_opt(sb, DELALLOC); 183756889787STheodore Ts'o clear_opt2(sb, EXPLICIT_DELALLOC); 1838dd919b98SAneesh Kumar K.V break; 18391449032bSTheodore Ts'o case Opt_mblk_io_submit: 1840fd8c37ecSTheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 18411449032bSTheodore Ts'o break; 18421449032bSTheodore Ts'o case Opt_nomblk_io_submit: 1843fd8c37ecSTheodore Ts'o clear_opt(sb, MBLK_IO_SUBMIT); 18441449032bSTheodore Ts'o break; 1845c9de560dSAlex Tomas case Opt_stripe: 1846c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1847c9de560dSAlex Tomas return 0; 1848c9de560dSAlex Tomas if (option < 0) 1849c9de560dSAlex Tomas return 0; 1850c9de560dSAlex Tomas sbi->s_stripe = option; 1851c9de560dSAlex Tomas break; 185264769240SAlex Tomas case Opt_delalloc: 1853fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 185456889787STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 185564769240SAlex Tomas break; 18566fd058f7STheodore Ts'o case Opt_block_validity: 1857fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 18586fd058f7STheodore Ts'o break; 18596fd058f7STheodore Ts'o case Opt_noblock_validity: 1860fd8c37ecSTheodore Ts'o clear_opt(sb, BLOCK_VALIDITY); 18616fd058f7STheodore Ts'o break; 1862240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1863240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1864240799cdSTheodore Ts'o return 0; 1865240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1866240799cdSTheodore Ts'o return 0; 18675dbd571dSAlexander V. Lukyanov if (option && !is_power_of_2(option)) { 1868b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1869b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1870b31e1552SEric Sandeen " must be a power of 2"); 18713197ebdbSTheodore Ts'o return 0; 18723197ebdbSTheodore Ts'o } 1873240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1874240799cdSTheodore Ts'o break; 1875b3881f74STheodore Ts'o case Opt_journal_ioprio: 1876b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1877b3881f74STheodore Ts'o return 0; 1878b3881f74STheodore Ts'o if (option < 0 || option > 7) 1879b3881f74STheodore Ts'o break; 1880b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1881b3881f74STheodore Ts'o option); 1882b3881f74STheodore Ts'o break; 188306705bffSTheodore Ts'o case Opt_noauto_da_alloc: 1884fd8c37ecSTheodore Ts'o set_opt(sb, NO_AUTO_DA_ALLOC); 188506705bffSTheodore Ts'o break; 1886afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 188715121c18SEric Sandeen if (args[0].from) { 188815121c18SEric Sandeen if (match_int(&args[0], &option)) 188915121c18SEric Sandeen return 0; 189015121c18SEric Sandeen } else 189115121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1892afd4672dSTheodore Ts'o if (option) 1893fd8c37ecSTheodore Ts'o clear_opt(sb, NO_AUTO_DA_ALLOC); 1894afd4672dSTheodore Ts'o else 1895fd8c37ecSTheodore Ts'o set_opt(sb,NO_AUTO_DA_ALLOC); 1896afd4672dSTheodore Ts'o break; 18975328e635SEric Sandeen case Opt_discard: 1898fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 18995328e635SEric Sandeen break; 19005328e635SEric Sandeen case Opt_nodiscard: 1901fd8c37ecSTheodore Ts'o clear_opt(sb, DISCARD); 19025328e635SEric Sandeen break; 1903744692dcSJiaying Zhang case Opt_dioread_nolock: 1904fd8c37ecSTheodore Ts'o set_opt(sb, DIOREAD_NOLOCK); 1905744692dcSJiaying Zhang break; 1906744692dcSJiaying Zhang case Opt_dioread_lock: 1907fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 1908744692dcSJiaying Zhang break; 1909fc6cb1cdSTheodore Ts'o case Opt_init_itable: 1910fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 1911bfff6873SLukas Czerner if (args[0].from) { 1912bfff6873SLukas Czerner if (match_int(&args[0], &option)) 1913bfff6873SLukas Czerner return 0; 1914bfff6873SLukas Czerner } else 1915bfff6873SLukas Czerner option = EXT4_DEF_LI_WAIT_MULT; 1916bfff6873SLukas Czerner if (option < 0) 1917bfff6873SLukas Czerner return 0; 1918bfff6873SLukas Czerner sbi->s_li_wait_mult = option; 1919bfff6873SLukas Czerner break; 1920fc6cb1cdSTheodore Ts'o case Opt_noinit_itable: 1921fd8c37ecSTheodore Ts'o clear_opt(sb, INIT_INODE_TABLE); 1922bfff6873SLukas Czerner break; 1923ac27a0ecSDave Kleikamp default: 1924b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1925b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1926b31e1552SEric Sandeen "or missing value", p); 1927ac27a0ecSDave Kleikamp return 0; 1928ac27a0ecSDave Kleikamp } 1929ac27a0ecSDave Kleikamp } 1930ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1931ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1932482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1933fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1934ac27a0ecSDave Kleikamp 1935482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1936fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1937ac27a0ecSDave Kleikamp 193856c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1939b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1940b31e1552SEric Sandeen "format mixing"); 1941ac27a0ecSDave Kleikamp return 0; 1942ac27a0ecSDave Kleikamp } 1943ac27a0ecSDave Kleikamp 1944ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1945b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1946b31e1552SEric Sandeen "not specified"); 1947ac27a0ecSDave Kleikamp return 0; 1948ac27a0ecSDave Kleikamp } 1949ac27a0ecSDave Kleikamp } else { 1950ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1951b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 19522c8be6b2SJan Kara "specified with no journaling " 1953b31e1552SEric Sandeen "enabled"); 1954ac27a0ecSDave Kleikamp return 0; 1955ac27a0ecSDave Kleikamp } 1956ac27a0ecSDave Kleikamp } 1957ac27a0ecSDave Kleikamp #endif 1958ac27a0ecSDave Kleikamp return 1; 1959ac27a0ecSDave Kleikamp } 1960ac27a0ecSDave Kleikamp 1961617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1962ac27a0ecSDave Kleikamp int read_only) 1963ac27a0ecSDave Kleikamp { 1964617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1965ac27a0ecSDave Kleikamp int res = 0; 1966ac27a0ecSDave Kleikamp 1967617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1968b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1969b31e1552SEric Sandeen "forcing read-only mode"); 1970ac27a0ecSDave Kleikamp res = MS_RDONLY; 1971ac27a0ecSDave Kleikamp } 1972ac27a0ecSDave Kleikamp if (read_only) 1973281b5995STheodore Ts'o goto done; 1974617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1975b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1976b31e1552SEric Sandeen "running e2fsck is recommended"); 1977617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1978b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1979b31e1552SEric Sandeen "warning: mounting fs with errors, " 1980b31e1552SEric Sandeen "running e2fsck is recommended"); 1981ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1982ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1983ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1984b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1985b31e1552SEric Sandeen "warning: maximal mount count reached, " 1986b31e1552SEric Sandeen "running e2fsck is recommended"); 1987ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1988ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1989ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1990b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1991b31e1552SEric Sandeen "warning: checktime reached, " 1992b31e1552SEric Sandeen "running e2fsck is recommended"); 19930390131bSFrank Mayhar if (!sbi->s_journal) 1994216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1995ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1996617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1997e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1998ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1999617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 20000390131bSFrank Mayhar if (sbi->s_journal) 2001617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2002ac27a0ecSDave Kleikamp 2003e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 2004281b5995STheodore Ts'o done: 2005ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2006a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2007a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2008ac27a0ecSDave Kleikamp sb->s_blocksize, 2009ac27a0ecSDave Kleikamp sbi->s_groups_count, 2010617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2011617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2012a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2013ac27a0ecSDave Kleikamp 20147abc52c2SDan Magenheimer cleancache_init_fs(sb); 2015ac27a0ecSDave Kleikamp return res; 2016ac27a0ecSDave Kleikamp } 2017ac27a0ecSDave Kleikamp 2018772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2019772cb7c8SJose R. Santos { 2020772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2021772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 2022772cb7c8SJose R. Santos ext4_group_t flex_group_count; 2023772cb7c8SJose R. Santos ext4_group_t flex_group; 2024d50f2ab6SXi Wang unsigned int groups_per_flex = 0; 2025c5ca7c76STheodore Ts'o size_t size; 2026772cb7c8SJose R. Santos int i; 2027772cb7c8SJose R. Santos 2028503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2029d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2030772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2031772cb7c8SJose R. Santos return 1; 2032772cb7c8SJose R. Santos } 2033d50f2ab6SXi Wang groups_per_flex = 1 << sbi->s_log_groups_per_flex; 2034772cb7c8SJose R. Santos 2035c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 2036c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 2037d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 2038d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 2039c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 20409933fc0aSTheodore Ts'o sbi->s_flex_groups = ext4_kvzalloc(size, GFP_KERNEL); 2041c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 20429933fc0aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %u flex groups", 204394de56abSJoe Perches flex_group_count); 2044772cb7c8SJose R. Santos goto failed; 2045772cb7c8SJose R. Santos } 2046772cb7c8SJose R. Santos 2047772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 204888b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2049772cb7c8SJose R. Santos 2050772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 20517ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 20527ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 2053021b65bbSTheodore Ts'o atomic_add(ext4_free_group_clusters(sb, gdp), 205424aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 20557ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 20567ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2057772cb7c8SJose R. Santos } 2058772cb7c8SJose R. Santos 2059772cb7c8SJose R. Santos return 1; 2060772cb7c8SJose R. Santos failed: 2061772cb7c8SJose R. Santos return 0; 2062772cb7c8SJose R. Santos } 2063772cb7c8SJose R. Santos 2064717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 2065717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2066717d50e4SAndreas Dilger { 2067717d50e4SAndreas Dilger __u16 crc = 0; 2068717d50e4SAndreas Dilger 2069717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 2070717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 2071717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 2072717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2073717d50e4SAndreas Dilger 2074717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2075717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2076717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2077717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2078717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2079717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2080717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2081717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2082717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2083717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2084717d50e4SAndreas Dilger offset); 2085717d50e4SAndreas Dilger } 2086717d50e4SAndreas Dilger 2087717d50e4SAndreas Dilger return cpu_to_le16(crc); 2088717d50e4SAndreas Dilger } 2089717d50e4SAndreas Dilger 2090717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 2091717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2092717d50e4SAndreas Dilger { 2093717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 2094717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 2095717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 2096717d50e4SAndreas Dilger return 0; 2097717d50e4SAndreas Dilger 2098717d50e4SAndreas Dilger return 1; 2099717d50e4SAndreas Dilger } 2100717d50e4SAndreas Dilger 2101ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2102bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2103bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2104ac27a0ecSDave Kleikamp { 2105617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2106617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2107617ba13bSMingming Cao ext4_fsblk_t last_block; 2108bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2109bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2110bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2111ce421581SJose R. Santos int flexbg_flag = 0; 2112bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2113ac27a0ecSDave Kleikamp 2114ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2115ce421581SJose R. Santos flexbg_flag = 1; 2116ce421581SJose R. Santos 2117617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2118ac27a0ecSDave Kleikamp 2119197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2120197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2121197cd65aSAkinobu Mita 2122ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2123bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2124ac27a0ecSDave Kleikamp else 2125ac27a0ecSDave Kleikamp last_block = first_block + 2126617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2127ac27a0ecSDave Kleikamp 2128bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2129bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2130bfff6873SLukas Czerner grp = i; 2131bfff6873SLukas Czerner 21328fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 21332b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2134b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2135a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2136b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2137ac27a0ecSDave Kleikamp return 0; 2138ac27a0ecSDave Kleikamp } 21398fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 21402b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2141b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2142a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2143b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2144ac27a0ecSDave Kleikamp return 0; 2145ac27a0ecSDave Kleikamp } 21468fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2147bd81d8eeSLaurent Vivier if (inode_table < first_block || 21482b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2149b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2150a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2151b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2152ac27a0ecSDave Kleikamp return 0; 2153ac27a0ecSDave Kleikamp } 2154955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2155717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 2156b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2157b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2158fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2159fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21607ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2161955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2162717d50e4SAndreas Dilger return 0; 2163717d50e4SAndreas Dilger } 21647ee1ec4cSLi Zefan } 2165955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2166ce421581SJose R. Santos if (!flexbg_flag) 2167617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2168ac27a0ecSDave Kleikamp } 2169bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2170bfff6873SLukas Czerner *first_not_zeroed = grp; 2171ac27a0ecSDave Kleikamp 21725dee5437STheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 21735dee5437STheodore Ts'o EXT4_C2B(sbi, ext4_count_free_clusters(sb))); 2174617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2175ac27a0ecSDave Kleikamp return 1; 2176ac27a0ecSDave Kleikamp } 2177ac27a0ecSDave Kleikamp 2178617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2179ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2180ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2181ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2182ac27a0ecSDave Kleikamp * 2183ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2184ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2185ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2186ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2187ac27a0ecSDave Kleikamp * 2188ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2189ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2190ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2191617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2192ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2193ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2194ac27a0ecSDave Kleikamp */ 2195617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2196617ba13bSMingming Cao struct ext4_super_block *es) 2197ac27a0ecSDave Kleikamp { 2198ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2199ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2200ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2201ac27a0ecSDave Kleikamp int i; 2202ac27a0ecSDave Kleikamp #endif 2203ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2204ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2205ac27a0ecSDave Kleikamp return; 2206ac27a0ecSDave Kleikamp } 2207ac27a0ecSDave Kleikamp 2208a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2209b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2210b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2211a8f48a95SEric Sandeen return; 2212a8f48a95SEric Sandeen } 2213a8f48a95SEric Sandeen 2214d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2215d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2216d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2217d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2218d39195c3SAmir Goldstein return; 2219d39195c3SAmir Goldstein } 2220d39195c3SAmir Goldstein 2221617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2222ac27a0ecSDave Kleikamp if (es->s_last_orphan) 2223ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2224ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2225ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2226ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2227ac27a0ecSDave Kleikamp return; 2228ac27a0ecSDave Kleikamp } 2229ac27a0ecSDave Kleikamp 2230ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2231b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2232ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2233ac27a0ecSDave Kleikamp } 2234ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2235ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2236ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2237ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2238ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2239617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2240617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2241ac27a0ecSDave Kleikamp if (ret < 0) 2242b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2243b31e1552SEric Sandeen "Cannot turn on journaled " 2244b31e1552SEric Sandeen "quota: error %d", ret); 2245ac27a0ecSDave Kleikamp } 2246ac27a0ecSDave Kleikamp } 2247ac27a0ecSDave Kleikamp #endif 2248ac27a0ecSDave Kleikamp 2249ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2250ac27a0ecSDave Kleikamp struct inode *inode; 2251ac27a0ecSDave Kleikamp 225297bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 225397bd42b9SJosef Bacik if (IS_ERR(inode)) { 2254ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2255ac27a0ecSDave Kleikamp break; 2256ac27a0ecSDave Kleikamp } 2257ac27a0ecSDave Kleikamp 2258617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2259871a2931SChristoph Hellwig dquot_initialize(inode); 2260ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2261b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2262b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 226346e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2264e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2265ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2266617ba13bSMingming Cao ext4_truncate(inode); 2267ac27a0ecSDave Kleikamp nr_truncates++; 2268ac27a0ecSDave Kleikamp } else { 2269b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2270b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 227146e665e9SHarvey Harrison __func__, inode->i_ino); 2272ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2273ac27a0ecSDave Kleikamp inode->i_ino); 2274ac27a0ecSDave Kleikamp nr_orphans++; 2275ac27a0ecSDave Kleikamp } 2276ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2277ac27a0ecSDave Kleikamp } 2278ac27a0ecSDave Kleikamp 2279ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2280ac27a0ecSDave Kleikamp 2281ac27a0ecSDave Kleikamp if (nr_orphans) 2282b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2283b31e1552SEric Sandeen PLURAL(nr_orphans)); 2284ac27a0ecSDave Kleikamp if (nr_truncates) 2285b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2286b31e1552SEric Sandeen PLURAL(nr_truncates)); 2287ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2288ac27a0ecSDave Kleikamp /* Turn quotas off */ 2289ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2290ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2291287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2292ac27a0ecSDave Kleikamp } 2293ac27a0ecSDave Kleikamp #endif 2294ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2295ac27a0ecSDave Kleikamp } 22960b8e58a1SAndreas Dilger 2297cd2291a4SEric Sandeen /* 2298cd2291a4SEric Sandeen * Maximal extent format file size. 2299cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2300cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2301cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2302cd2291a4SEric Sandeen * so that won't be a limiting factor. 2303cd2291a4SEric Sandeen * 2304f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2305f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2306f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2307f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2308f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2309f17722f9SLukas Czerner * 2310cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2311cd2291a4SEric Sandeen */ 2312f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2313cd2291a4SEric Sandeen { 2314cd2291a4SEric Sandeen loff_t res; 2315cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2316cd2291a4SEric Sandeen 2317cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2318f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2319cd2291a4SEric Sandeen /* 232090c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2321cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2322cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2323cd2291a4SEric Sandeen */ 2324cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2325cd2291a4SEric Sandeen 2326cd2291a4SEric Sandeen /* total blocks in file system block size */ 2327cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2328cd2291a4SEric Sandeen upper_limit <<= blkbits; 2329cd2291a4SEric Sandeen } 2330cd2291a4SEric Sandeen 2331f17722f9SLukas Czerner /* 2332f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2333f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2334f17722f9SLukas Czerner * size 2335f17722f9SLukas Czerner */ 2336f17722f9SLukas Czerner res = (1LL << 32) - 1; 2337cd2291a4SEric Sandeen res <<= blkbits; 2338cd2291a4SEric Sandeen 2339cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2340cd2291a4SEric Sandeen if (res > upper_limit) 2341cd2291a4SEric Sandeen res = upper_limit; 2342cd2291a4SEric Sandeen 2343cd2291a4SEric Sandeen return res; 2344cd2291a4SEric Sandeen } 2345ac27a0ecSDave Kleikamp 2346ac27a0ecSDave Kleikamp /* 2347cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 23480fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 23490fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2350ac27a0ecSDave Kleikamp */ 2351f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2352ac27a0ecSDave Kleikamp { 2353617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 23540fc1b451SAneesh Kumar K.V int meta_blocks; 23550fc1b451SAneesh Kumar K.V loff_t upper_limit; 23560b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 23570b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23580b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23590b8e58a1SAndreas Dilger * 23600b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23610b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23620fc1b451SAneesh Kumar K.V */ 23630fc1b451SAneesh Kumar K.V 2364f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23650fc1b451SAneesh Kumar K.V /* 236690c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23670b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23680b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23690fc1b451SAneesh Kumar K.V */ 23700fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23710fc1b451SAneesh Kumar K.V 23720fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23730fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23740fc1b451SAneesh Kumar K.V 23750fc1b451SAneesh Kumar K.V } else { 23768180a562SAneesh Kumar K.V /* 23778180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23788180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23798180a562SAneesh Kumar K.V * represent total number of blocks in 23808180a562SAneesh Kumar K.V * file system block size 23818180a562SAneesh Kumar K.V */ 23820fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23830fc1b451SAneesh Kumar K.V 23840fc1b451SAneesh Kumar K.V } 23850fc1b451SAneesh Kumar K.V 23860fc1b451SAneesh Kumar K.V /* indirect blocks */ 23870fc1b451SAneesh Kumar K.V meta_blocks = 1; 23880fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23890fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23900fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23910fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23920fc1b451SAneesh Kumar K.V 23930fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23940fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2395ac27a0ecSDave Kleikamp 2396ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2397ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2398ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2399ac27a0ecSDave Kleikamp res <<= bits; 2400ac27a0ecSDave Kleikamp if (res > upper_limit) 2401ac27a0ecSDave Kleikamp res = upper_limit; 24020fc1b451SAneesh Kumar K.V 24030fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 24040fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 24050fc1b451SAneesh Kumar K.V 2406ac27a0ecSDave Kleikamp return res; 2407ac27a0ecSDave Kleikamp } 2408ac27a0ecSDave Kleikamp 2409617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 241070bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2411ac27a0ecSDave Kleikamp { 2412617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2413fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2414ac27a0ecSDave Kleikamp int has_super = 0; 2415ac27a0ecSDave Kleikamp 2416ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2417ac27a0ecSDave Kleikamp 2418617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2419ac27a0ecSDave Kleikamp nr < first_meta_bg) 242070bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2421ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2422617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2423ac27a0ecSDave Kleikamp has_super = 1; 24240b8e58a1SAndreas Dilger 2425617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2426ac27a0ecSDave Kleikamp } 2427ac27a0ecSDave Kleikamp 2428c9de560dSAlex Tomas /** 2429c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2430c9de560dSAlex Tomas * @sbi: In memory super block info 2431c9de560dSAlex Tomas * 2432c9de560dSAlex Tomas * If we have specified it via mount option, then 2433c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2434c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2435c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2436c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2437c9de560dSAlex Tomas * 2438c9de560dSAlex Tomas */ 2439c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2440c9de560dSAlex Tomas { 2441c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2442c9de560dSAlex Tomas unsigned long stripe_width = 2443c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 24443eb08658SDan Ehrenberg int ret; 2445c9de560dSAlex Tomas 2446c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 24473eb08658SDan Ehrenberg ret = sbi->s_stripe; 24483eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24493eb08658SDan Ehrenberg ret = stripe_width; 24503eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24513eb08658SDan Ehrenberg ret = stride; 24523eb08658SDan Ehrenberg else 24533eb08658SDan Ehrenberg ret = 0; 2454c9de560dSAlex Tomas 24553eb08658SDan Ehrenberg /* 24563eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24573eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24583eb08658SDan Ehrenberg */ 24593eb08658SDan Ehrenberg if (ret <= 1) 24603eb08658SDan Ehrenberg ret = 0; 2461c9de560dSAlex Tomas 24623eb08658SDan Ehrenberg return ret; 2463c9de560dSAlex Tomas } 2464ac27a0ecSDave Kleikamp 24653197ebdbSTheodore Ts'o /* sysfs supprt */ 24663197ebdbSTheodore Ts'o 24673197ebdbSTheodore Ts'o struct ext4_attr { 24683197ebdbSTheodore Ts'o struct attribute attr; 24693197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24703197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24713197ebdbSTheodore Ts'o const char *, size_t); 24723197ebdbSTheodore Ts'o int offset; 24733197ebdbSTheodore Ts'o }; 24743197ebdbSTheodore Ts'o 24753197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 24763197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 24773197ebdbSTheodore Ts'o { 24783197ebdbSTheodore Ts'o char *endp; 24793197ebdbSTheodore Ts'o 2480e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2481e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 24823197ebdbSTheodore Ts'o if (*endp || *value > max) 24833197ebdbSTheodore Ts'o return -EINVAL; 24843197ebdbSTheodore Ts'o 24853197ebdbSTheodore Ts'o return 0; 24863197ebdbSTheodore Ts'o } 24873197ebdbSTheodore Ts'o 24883197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24893197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24903197ebdbSTheodore Ts'o char *buf) 24913197ebdbSTheodore Ts'o { 24923197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24937b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24947b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24953197ebdbSTheodore Ts'o } 24963197ebdbSTheodore Ts'o 24973197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24983197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24993197ebdbSTheodore Ts'o { 25003197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 25013197ebdbSTheodore Ts'o 2502f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2503f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 25043197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 25053197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 25063197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 25073197ebdbSTheodore Ts'o } 25083197ebdbSTheodore Ts'o 25093197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 25103197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 25113197ebdbSTheodore Ts'o { 25123197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 25133197ebdbSTheodore Ts'o 2514f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2515f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 25163197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2517a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 25183197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2519a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 25203197ebdbSTheodore Ts'o } 25213197ebdbSTheodore Ts'o 252277f4135fSVivek Haldar static ssize_t extent_cache_hits_show(struct ext4_attr *a, 252377f4135fSVivek Haldar struct ext4_sb_info *sbi, char *buf) 252477f4135fSVivek Haldar { 252577f4135fSVivek Haldar return snprintf(buf, PAGE_SIZE, "%lu\n", sbi->extent_cache_hits); 252677f4135fSVivek Haldar } 252777f4135fSVivek Haldar 252877f4135fSVivek Haldar static ssize_t extent_cache_misses_show(struct ext4_attr *a, 252977f4135fSVivek Haldar struct ext4_sb_info *sbi, char *buf) 253077f4135fSVivek Haldar { 253177f4135fSVivek Haldar return snprintf(buf, PAGE_SIZE, "%lu\n", sbi->extent_cache_misses); 253277f4135fSVivek Haldar } 253377f4135fSVivek Haldar 25343197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 25353197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25363197ebdbSTheodore Ts'o const char *buf, size_t count) 25373197ebdbSTheodore Ts'o { 25383197ebdbSTheodore Ts'o unsigned long t; 25393197ebdbSTheodore Ts'o 25403197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 25413197ebdbSTheodore Ts'o return -EINVAL; 25423197ebdbSTheodore Ts'o 25435dbd571dSAlexander V. Lukyanov if (t && !is_power_of_2(t)) 25443197ebdbSTheodore Ts'o return -EINVAL; 25453197ebdbSTheodore Ts'o 25463197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 25473197ebdbSTheodore Ts'o return count; 25483197ebdbSTheodore Ts'o } 25493197ebdbSTheodore Ts'o 25503197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 25513197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 25523197ebdbSTheodore Ts'o { 25533197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 25543197ebdbSTheodore Ts'o 25553197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 25563197ebdbSTheodore Ts'o } 25573197ebdbSTheodore Ts'o 25583197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 25593197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25603197ebdbSTheodore Ts'o const char *buf, size_t count) 25613197ebdbSTheodore Ts'o { 25623197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 25633197ebdbSTheodore Ts'o unsigned long t; 25643197ebdbSTheodore Ts'o 25653197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 25663197ebdbSTheodore Ts'o return -EINVAL; 25673197ebdbSTheodore Ts'o *ui = t; 25683197ebdbSTheodore Ts'o return count; 25693197ebdbSTheodore Ts'o } 25703197ebdbSTheodore Ts'o 25713197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 25723197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 25733197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 25743197ebdbSTheodore Ts'o .show = _show, \ 25753197ebdbSTheodore Ts'o .store = _store, \ 25763197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 25773197ebdbSTheodore Ts'o } 25783197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 25793197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 25803197ebdbSTheodore Ts'o 2581857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 25823197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 25833197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 25843197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 25853197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 25863197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 25873197ebdbSTheodore Ts'o 25883197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 25893197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 25903197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 259177f4135fSVivek Haldar EXT4_RO_ATTR(extent_cache_hits); 259277f4135fSVivek Haldar EXT4_RO_ATTR(extent_cache_misses); 25933197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 25943197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 259511013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 25963197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 25973197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 25983197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 25993197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 26003197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 26013197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 260255138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 26033197ebdbSTheodore Ts'o 26043197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 26053197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 26063197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 26073197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 260877f4135fSVivek Haldar ATTR_LIST(extent_cache_hits), 260977f4135fSVivek Haldar ATTR_LIST(extent_cache_misses), 26103197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 261111013911SAndreas Dilger ATTR_LIST(inode_goal), 26123197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 26133197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 26143197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 26153197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 26163197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 26173197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 261855138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 26193197ebdbSTheodore Ts'o NULL, 26203197ebdbSTheodore Ts'o }; 26213197ebdbSTheodore Ts'o 2622857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2623857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 262427ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 2625857ac889SLukas Czerner 2626857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2627857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 262827ee40dfSLukas Czerner ATTR_LIST(batched_discard), 2629857ac889SLukas Czerner NULL, 2630857ac889SLukas Czerner }; 2631857ac889SLukas Czerner 26323197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 26333197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 26343197ebdbSTheodore Ts'o { 26353197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26363197ebdbSTheodore Ts'o s_kobj); 26373197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26383197ebdbSTheodore Ts'o 26393197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 26403197ebdbSTheodore Ts'o } 26413197ebdbSTheodore Ts'o 26423197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 26433197ebdbSTheodore Ts'o struct attribute *attr, 26443197ebdbSTheodore Ts'o const char *buf, size_t len) 26453197ebdbSTheodore Ts'o { 26463197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26473197ebdbSTheodore Ts'o s_kobj); 26483197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26493197ebdbSTheodore Ts'o 26503197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 26513197ebdbSTheodore Ts'o } 26523197ebdbSTheodore Ts'o 26533197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 26543197ebdbSTheodore Ts'o { 26553197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26563197ebdbSTheodore Ts'o s_kobj); 26573197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 26583197ebdbSTheodore Ts'o } 26593197ebdbSTheodore Ts'o 266052cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 26613197ebdbSTheodore Ts'o .show = ext4_attr_show, 26623197ebdbSTheodore Ts'o .store = ext4_attr_store, 26633197ebdbSTheodore Ts'o }; 26643197ebdbSTheodore Ts'o 26653197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 26663197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 26673197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 26683197ebdbSTheodore Ts'o .release = ext4_sb_release, 26693197ebdbSTheodore Ts'o }; 26703197ebdbSTheodore Ts'o 2671857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2672857ac889SLukas Czerner { 2673857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2674857ac889SLukas Czerner } 2675857ac889SLukas Czerner 2676857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2677857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2678857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2679857ac889SLukas Czerner .release = ext4_feat_release, 2680857ac889SLukas Czerner }; 2681857ac889SLukas Czerner 2682a13fb1a4SEric Sandeen /* 2683a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2684a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2685a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2686a13fb1a4SEric Sandeen * 0 if it cannot be. 2687a13fb1a4SEric Sandeen */ 2688a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2689a13fb1a4SEric Sandeen { 2690a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2691a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2692a13fb1a4SEric Sandeen "Couldn't mount because of " 2693a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2694a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2695a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2696a13fb1a4SEric Sandeen return 0; 2697a13fb1a4SEric Sandeen } 2698a13fb1a4SEric Sandeen 2699a13fb1a4SEric Sandeen if (readonly) 2700a13fb1a4SEric Sandeen return 1; 2701a13fb1a4SEric Sandeen 2702a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2703a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2704a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2705a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2706a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2707a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2708a13fb1a4SEric Sandeen return 0; 2709a13fb1a4SEric Sandeen } 2710a13fb1a4SEric Sandeen /* 2711a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2712a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2713a13fb1a4SEric Sandeen */ 2714a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2715a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2716a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2717a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2718a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2719a13fb1a4SEric Sandeen return 0; 2720a13fb1a4SEric Sandeen } 2721a13fb1a4SEric Sandeen } 2722bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2723bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2724bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2725bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2726bab08ab9STheodore Ts'o "extents feature\n"); 2727bab08ab9STheodore Ts'o return 0; 2728bab08ab9STheodore Ts'o } 2729a13fb1a4SEric Sandeen return 1; 2730a13fb1a4SEric Sandeen } 2731a13fb1a4SEric Sandeen 273266e61a9eSTheodore Ts'o /* 273366e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 273466e61a9eSTheodore Ts'o * on the file system 273566e61a9eSTheodore Ts'o */ 273666e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 273766e61a9eSTheodore Ts'o { 273866e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 273966e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 274066e61a9eSTheodore Ts'o struct ext4_super_block *es; 274166e61a9eSTheodore Ts'o 274266e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 274366e61a9eSTheodore Ts'o es = sbi->s_es; 274466e61a9eSTheodore Ts'o 274566e61a9eSTheodore Ts'o if (es->s_error_count) 274666e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 274766e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 274866e61a9eSTheodore Ts'o if (es->s_first_error_time) { 274966e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 275066e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 275166e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 275266e61a9eSTheodore Ts'o es->s_first_error_func, 275366e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 275466e61a9eSTheodore Ts'o if (es->s_first_error_ino) 275566e61a9eSTheodore Ts'o printk(": inode %u", 275666e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 275766e61a9eSTheodore Ts'o if (es->s_first_error_block) 275866e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 275966e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 276066e61a9eSTheodore Ts'o printk("\n"); 276166e61a9eSTheodore Ts'o } 276266e61a9eSTheodore Ts'o if (es->s_last_error_time) { 276366e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 276466e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 276566e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 276666e61a9eSTheodore Ts'o es->s_last_error_func, 276766e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 276866e61a9eSTheodore Ts'o if (es->s_last_error_ino) 276966e61a9eSTheodore Ts'o printk(": inode %u", 277066e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 277166e61a9eSTheodore Ts'o if (es->s_last_error_block) 277266e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 277366e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 277466e61a9eSTheodore Ts'o printk("\n"); 277566e61a9eSTheodore Ts'o } 277666e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 277766e61a9eSTheodore Ts'o } 277866e61a9eSTheodore Ts'o 2779bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2780bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2781bfff6873SLukas Czerner { 2782bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2783bfff6873SLukas Czerner ext4_group_t group, ngroups; 2784bfff6873SLukas Czerner struct super_block *sb; 2785bfff6873SLukas Czerner unsigned long timeout = 0; 2786bfff6873SLukas Czerner int ret = 0; 2787bfff6873SLukas Czerner 2788bfff6873SLukas Czerner sb = elr->lr_super; 2789bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2790bfff6873SLukas Czerner 2791bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2792bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2793bfff6873SLukas Czerner if (!gdp) { 2794bfff6873SLukas Czerner ret = 1; 2795bfff6873SLukas Czerner break; 2796bfff6873SLukas Czerner } 2797bfff6873SLukas Czerner 2798bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2799bfff6873SLukas Czerner break; 2800bfff6873SLukas Czerner } 2801bfff6873SLukas Czerner 2802bfff6873SLukas Czerner if (group == ngroups) 2803bfff6873SLukas Czerner ret = 1; 2804bfff6873SLukas Czerner 2805bfff6873SLukas Czerner if (!ret) { 2806bfff6873SLukas Czerner timeout = jiffies; 2807bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2808bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2809bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 281051ce6511SLukas Czerner timeout = (jiffies - timeout) * 281151ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2812bfff6873SLukas Czerner elr->lr_timeout = timeout; 2813bfff6873SLukas Czerner } 2814bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2815bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2816bfff6873SLukas Czerner } 2817bfff6873SLukas Czerner 2818bfff6873SLukas Czerner return ret; 2819bfff6873SLukas Czerner } 2820bfff6873SLukas Czerner 2821bfff6873SLukas Czerner /* 2822bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 28234ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2824bfff6873SLukas Czerner */ 2825bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2826bfff6873SLukas Czerner { 2827bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2828bfff6873SLukas Czerner 2829bfff6873SLukas Czerner if (!elr) 2830bfff6873SLukas Czerner return; 2831bfff6873SLukas Czerner 2832bfff6873SLukas Czerner sbi = elr->lr_sbi; 2833bfff6873SLukas Czerner 2834bfff6873SLukas Czerner list_del(&elr->lr_request); 2835bfff6873SLukas Czerner sbi->s_li_request = NULL; 2836bfff6873SLukas Czerner kfree(elr); 2837bfff6873SLukas Czerner } 2838bfff6873SLukas Czerner 2839bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2840bfff6873SLukas Czerner { 28411bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 28421bb933fbSLukas Czerner if (!ext4_li_info) { 28431bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2844bfff6873SLukas Czerner return; 28451bb933fbSLukas Czerner } 2846bfff6873SLukas Czerner 2847bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 28481bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2849bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 28501bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2851bfff6873SLukas Czerner } 2852bfff6873SLukas Czerner 28538f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 28548f1f7453SEric Sandeen 2855bfff6873SLukas Czerner /* 2856bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2857bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2858bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2859bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2860bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2861bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2862bfff6873SLukas Czerner * next waking time and put itself into sleep. 2863bfff6873SLukas Czerner */ 2864bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2865bfff6873SLukas Czerner { 2866bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2867bfff6873SLukas Czerner struct list_head *pos, *n; 2868bfff6873SLukas Czerner struct ext4_li_request *elr; 28694ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2870bfff6873SLukas Czerner 2871bfff6873SLukas Czerner BUG_ON(NULL == eli); 2872bfff6873SLukas Czerner 2873bfff6873SLukas Czerner cont_thread: 2874bfff6873SLukas Czerner while (true) { 2875bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2876bfff6873SLukas Czerner 2877bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2878bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2879bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2880bfff6873SLukas Czerner goto exit_thread; 2881bfff6873SLukas Czerner } 2882bfff6873SLukas Czerner 2883bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2884bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2885bfff6873SLukas Czerner lr_request); 2886bfff6873SLukas Czerner 2887b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2888b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2889b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2890bfff6873SLukas Czerner ext4_remove_li_request(elr); 2891bfff6873SLukas Czerner continue; 2892bfff6873SLukas Czerner } 2893b2c78cd0STheodore Ts'o } 2894bfff6873SLukas Czerner 2895bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2896bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2897bfff6873SLukas Czerner } 2898bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2899bfff6873SLukas Czerner 2900a0acae0eSTejun Heo try_to_freeze(); 2901bfff6873SLukas Czerner 29024ed5c033SLukas Czerner cur = jiffies; 29034ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2904f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2905bfff6873SLukas Czerner cond_resched(); 2906bfff6873SLukas Czerner continue; 2907bfff6873SLukas Czerner } 2908bfff6873SLukas Czerner 29094ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 29104ed5c033SLukas Czerner 29118f1f7453SEric Sandeen if (kthread_should_stop()) { 29128f1f7453SEric Sandeen ext4_clear_request_list(); 29138f1f7453SEric Sandeen goto exit_thread; 29148f1f7453SEric Sandeen } 2915bfff6873SLukas Czerner } 2916bfff6873SLukas Czerner 2917bfff6873SLukas Czerner exit_thread: 2918bfff6873SLukas Czerner /* 2919bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2920bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2921bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2922bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2923bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2924bfff6873SLukas Czerner * new one. 2925bfff6873SLukas Czerner */ 2926bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2927bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2928bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2929bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2930bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2931bfff6873SLukas Czerner goto cont_thread; 2932bfff6873SLukas Czerner } 2933bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2934bfff6873SLukas Czerner kfree(ext4_li_info); 2935bfff6873SLukas Czerner ext4_li_info = NULL; 2936bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2937bfff6873SLukas Czerner 2938bfff6873SLukas Czerner return 0; 2939bfff6873SLukas Czerner } 2940bfff6873SLukas Czerner 2941bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2942bfff6873SLukas Czerner { 2943bfff6873SLukas Czerner struct list_head *pos, *n; 2944bfff6873SLukas Czerner struct ext4_li_request *elr; 2945bfff6873SLukas Czerner 2946bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2947bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2948bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2949bfff6873SLukas Czerner lr_request); 2950bfff6873SLukas Czerner ext4_remove_li_request(elr); 2951bfff6873SLukas Czerner } 2952bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2953bfff6873SLukas Czerner } 2954bfff6873SLukas Czerner 2955bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2956bfff6873SLukas Czerner { 29578f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 29588f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 29598f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 29608f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2961bfff6873SLukas Czerner ext4_clear_request_list(); 2962bfff6873SLukas Czerner kfree(ext4_li_info); 2963bfff6873SLukas Czerner ext4_li_info = NULL; 2964bfff6873SLukas Czerner printk(KERN_CRIT "EXT4: error %d creating inode table " 2965bfff6873SLukas Czerner "initialization thread\n", 2966bfff6873SLukas Czerner err); 2967bfff6873SLukas Czerner return err; 2968bfff6873SLukas Czerner } 2969bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2970bfff6873SLukas Czerner return 0; 2971bfff6873SLukas Czerner } 2972bfff6873SLukas Czerner 2973bfff6873SLukas Czerner /* 2974bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2975bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2976bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2977bfff6873SLukas Czerner * groups and return total number of groups. 2978bfff6873SLukas Czerner */ 2979bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2980bfff6873SLukas Czerner { 2981bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2982bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2983bfff6873SLukas Czerner 2984bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2985bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2986bfff6873SLukas Czerner if (!gdp) 2987bfff6873SLukas Czerner continue; 2988bfff6873SLukas Czerner 2989bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2990bfff6873SLukas Czerner break; 2991bfff6873SLukas Czerner } 2992bfff6873SLukas Czerner 2993bfff6873SLukas Czerner return group; 2994bfff6873SLukas Czerner } 2995bfff6873SLukas Czerner 2996bfff6873SLukas Czerner static int ext4_li_info_new(void) 2997bfff6873SLukas Czerner { 2998bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2999bfff6873SLukas Czerner 3000bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3001bfff6873SLukas Czerner if (!eli) 3002bfff6873SLukas Czerner return -ENOMEM; 3003bfff6873SLukas Czerner 3004bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3005bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3006bfff6873SLukas Czerner 3007bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3008bfff6873SLukas Czerner 3009bfff6873SLukas Czerner ext4_li_info = eli; 3010bfff6873SLukas Czerner 3011bfff6873SLukas Czerner return 0; 3012bfff6873SLukas Czerner } 3013bfff6873SLukas Czerner 3014bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3015bfff6873SLukas Czerner ext4_group_t start) 3016bfff6873SLukas Czerner { 3017bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3018bfff6873SLukas Czerner struct ext4_li_request *elr; 3019bfff6873SLukas Czerner unsigned long rnd; 3020bfff6873SLukas Czerner 3021bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3022bfff6873SLukas Czerner if (!elr) 3023bfff6873SLukas Czerner return NULL; 3024bfff6873SLukas Czerner 3025bfff6873SLukas Czerner elr->lr_super = sb; 3026bfff6873SLukas Czerner elr->lr_sbi = sbi; 3027bfff6873SLukas Czerner elr->lr_next_group = start; 3028bfff6873SLukas Czerner 3029bfff6873SLukas Czerner /* 3030bfff6873SLukas Czerner * Randomize first schedule time of the request to 3031bfff6873SLukas Czerner * spread the inode table initialization requests 3032bfff6873SLukas Czerner * better. 3033bfff6873SLukas Czerner */ 3034bfff6873SLukas Czerner get_random_bytes(&rnd, sizeof(rnd)); 3035bfff6873SLukas Czerner elr->lr_next_sched = jiffies + (unsigned long)rnd % 3036bfff6873SLukas Czerner (EXT4_DEF_LI_MAX_START_DELAY * HZ); 3037bfff6873SLukas Czerner 3038bfff6873SLukas Czerner return elr; 3039bfff6873SLukas Czerner } 3040bfff6873SLukas Czerner 3041bfff6873SLukas Czerner static int ext4_register_li_request(struct super_block *sb, 3042bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3043bfff6873SLukas Czerner { 3044bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3045bfff6873SLukas Czerner struct ext4_li_request *elr; 3046bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 30476c5a6cb9SAndrew Morton int ret = 0; 3048bfff6873SLukas Czerner 304951ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 305051ce6511SLukas Czerner /* 305151ce6511SLukas Czerner * Reset timeout so it can be computed again, because 305251ce6511SLukas Czerner * s_li_wait_mult might have changed. 305351ce6511SLukas Czerner */ 305451ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 3055beed5ecbSNicolas Kaiser return 0; 305651ce6511SLukas Czerner } 3057bfff6873SLukas Czerner 3058bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3059bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 306055ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 3061beed5ecbSNicolas Kaiser return 0; 3062bfff6873SLukas Czerner 3063bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 3064beed5ecbSNicolas Kaiser if (!elr) 3065beed5ecbSNicolas Kaiser return -ENOMEM; 3066bfff6873SLukas Czerner 3067bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3068bfff6873SLukas Czerner 3069bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3070bfff6873SLukas Czerner ret = ext4_li_info_new(); 3071bfff6873SLukas Czerner if (ret) 3072bfff6873SLukas Czerner goto out; 3073bfff6873SLukas Czerner } 3074bfff6873SLukas Czerner 3075bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3076bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3077bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3078bfff6873SLukas Czerner 3079bfff6873SLukas Czerner sbi->s_li_request = elr; 308046e4690bSTao Ma /* 308146e4690bSTao Ma * set elr to NULL here since it has been inserted to 308246e4690bSTao Ma * the request_list and the removal and free of it is 308346e4690bSTao Ma * handled by ext4_clear_request_list from now on. 308446e4690bSTao Ma */ 308546e4690bSTao Ma elr = NULL; 3086bfff6873SLukas Czerner 3087bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3088bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3089bfff6873SLukas Czerner if (ret) 3090bfff6873SLukas Czerner goto out; 3091bfff6873SLukas Czerner } 3092bfff6873SLukas Czerner out: 3093bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3094beed5ecbSNicolas Kaiser if (ret) 3095bfff6873SLukas Czerner kfree(elr); 3096bfff6873SLukas Czerner return ret; 3097bfff6873SLukas Czerner } 3098bfff6873SLukas Czerner 3099bfff6873SLukas Czerner /* 3100bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3101bfff6873SLukas Czerner * module unload. 3102bfff6873SLukas Czerner */ 3103bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3104bfff6873SLukas Czerner { 3105bfff6873SLukas Czerner /* 3106bfff6873SLukas Czerner * If thread exited earlier 3107bfff6873SLukas Czerner * there's nothing to be done. 3108bfff6873SLukas Czerner */ 31098f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3110bfff6873SLukas Czerner return; 3111bfff6873SLukas Czerner 31128f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3113bfff6873SLukas Czerner } 3114bfff6873SLukas Czerner 3115617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3116ac27a0ecSDave Kleikamp { 3117d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3118ac27a0ecSDave Kleikamp struct buffer_head *bh; 3119617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3120617ba13bSMingming Cao struct ext4_sb_info *sbi; 3121617ba13bSMingming Cao ext4_fsblk_t block; 3122617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 312370bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3124ac27a0ecSDave Kleikamp unsigned long offset = 0; 3125ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3126ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3127ac27a0ecSDave Kleikamp struct inode *root; 31289f6200bbSTheodore Ts'o char *cp; 31290390131bSFrank Mayhar const char *descr; 3130dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3131281b5995STheodore Ts'o int blocksize, clustersize; 31324ec11028STheodore Ts'o unsigned int db_count; 31334ec11028STheodore Ts'o unsigned int i; 3134281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3135bd81d8eeSLaurent Vivier __u64 blocks_count; 3136833f4077SPeter Zijlstra int err; 3137b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3138bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3139ac27a0ecSDave Kleikamp 3140ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3141ac27a0ecSDave Kleikamp if (!sbi) 3142dcc7dae3SCyrill Gorcunov goto out_free_orig; 3143705895b6SPekka Enberg 3144705895b6SPekka Enberg sbi->s_blockgroup_lock = 3145705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3146705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3147705895b6SPekka Enberg kfree(sbi); 3148dcc7dae3SCyrill Gorcunov goto out_free_orig; 3149705895b6SPekka Enberg } 3150ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 3151ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 3152617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 3153617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 3154240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3155d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3156f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3157f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3158f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3159ac27a0ecSDave Kleikamp 31609f6200bbSTheodore Ts'o /* Cleanup superblock name */ 31619f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 31629f6200bbSTheodore Ts'o *cp = '!'; 31639f6200bbSTheodore Ts'o 3164dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3165617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3166ac27a0ecSDave Kleikamp if (!blocksize) { 3167b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3168ac27a0ecSDave Kleikamp goto out_fail; 3169ac27a0ecSDave Kleikamp } 3170ac27a0ecSDave Kleikamp 3171ac27a0ecSDave Kleikamp /* 3172617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3173ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3174ac27a0ecSDave Kleikamp */ 3175617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 317670bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 317770bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3178ac27a0ecSDave Kleikamp } else { 317970bbb3e0SAndrew Morton logical_sb_block = sb_block; 3180ac27a0ecSDave Kleikamp } 3181ac27a0ecSDave Kleikamp 318270bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3183b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3184ac27a0ecSDave Kleikamp goto out_fail; 3185ac27a0ecSDave Kleikamp } 3186ac27a0ecSDave Kleikamp /* 3187ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3188617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3189ac27a0ecSDave Kleikamp */ 3190617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3191ac27a0ecSDave Kleikamp sbi->s_es = es; 3192ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3193617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3194617ba13bSMingming Cao goto cantfind_ext4; 3195afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3196ac27a0ecSDave Kleikamp 3197ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3198ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3199fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3200617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3201fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 3202437ca0fdSDmitry Monakhov if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { 3203437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", 3204437ca0fdSDmitry Monakhov "2.6.38"); 3205fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3206437ca0fdSDmitry Monakhov } 3207617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3208fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3209ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 321003010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 3211fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 32122e7842b8SHugh Dickins #endif 321303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3214fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 32152e7842b8SHugh Dickins #endif 32166fd7a467STheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 3217617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3218fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3219617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3220fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3221617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3222fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3223ac27a0ecSDave Kleikamp 3224617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3225fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3226bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3227fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3228bb4f397aSAneesh Kumar K.V else 3229fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 32308b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3231fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 32328b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3233fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3234ac27a0ecSDave Kleikamp 3235ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 3236ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 323730773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 323830773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 323930773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3240ac27a0ecSDave Kleikamp 32418b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3242fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3243ac27a0ecSDave Kleikamp 32441e2462f9SMingming Cao /* 3245dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3246dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3247dd919b98SAneesh Kumar K.V */ 32488b67f04aSTheodore Ts'o if (!IS_EXT3_SB(sb) && 32498b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3250fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3251dd919b98SAneesh Kumar K.V 325251ce6511SLukas Czerner /* 325351ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 325451ce6511SLukas Czerner * no mount option specified. 325551ce6511SLukas Czerner */ 325651ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 325751ce6511SLukas Czerner 32588b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 32598b67f04aSTheodore Ts'o &journal_devnum, &journal_ioprio, NULL, 0)) { 32608b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 32618b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 32628b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 32638b67f04aSTheodore Ts'o } 3264b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3265b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 3266ac27a0ecSDave Kleikamp goto failed_mount; 3267ac27a0ecSDave Kleikamp 326856889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 326956889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 327056889787STheodore Ts'o "with data=journal disables delayed " 327156889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 327256889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 327356889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 327456889787STheodore Ts'o "both data=journal and delalloc"); 327556889787STheodore Ts'o goto failed_mount; 327656889787STheodore Ts'o } 327756889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 327856889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 327956889787STheodore Ts'o "both data=journal and delalloc"); 328056889787STheodore Ts'o goto failed_mount; 328156889787STheodore Ts'o } 328256889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 328356889787STheodore Ts'o clear_opt(sb, DELALLOC); 328456889787STheodore Ts'o } 328556889787STheodore Ts'o 328656889787STheodore Ts'o blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 328756889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 328856889787STheodore Ts'o if (blocksize < PAGE_SIZE) { 328956889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 329056889787STheodore Ts'o "dioread_nolock if block size != PAGE_SIZE"); 329156889787STheodore Ts'o goto failed_mount; 329256889787STheodore Ts'o } 329356889787STheodore Ts'o } 329456889787STheodore Ts'o 3295ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3296482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3297ac27a0ecSDave Kleikamp 3298617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3299617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3300617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3301617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3302b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3303b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3304b31e1552SEric Sandeen "running e2fsck is recommended"); 3305469108ffSTheodore Tso 33062035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 33072035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 33082035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 33092035e776STheodore Ts'o "using the ext4 subsystem"); 33102035e776STheodore Ts'o else { 33112035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 33122035e776STheodore Ts'o "to feature incompatibilities"); 33132035e776STheodore Ts'o goto failed_mount; 33142035e776STheodore Ts'o } 33152035e776STheodore Ts'o } 33162035e776STheodore Ts'o 33172035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 33182035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 33192035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 33202035e776STheodore Ts'o "using the ext4 subsystem"); 33212035e776STheodore Ts'o else { 33222035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 33232035e776STheodore Ts'o "to feature incompatibilities"); 33242035e776STheodore Ts'o goto failed_mount; 33252035e776STheodore Ts'o } 33262035e776STheodore Ts'o } 33272035e776STheodore Ts'o 3328469108ffSTheodore Tso /* 3329ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3330ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3331ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3332ac27a0ecSDave Kleikamp */ 3333a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3334ac27a0ecSDave Kleikamp goto failed_mount; 3335a13fb1a4SEric Sandeen 3336617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3337617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3338b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3339b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3340ac27a0ecSDave Kleikamp goto failed_mount; 3341ac27a0ecSDave Kleikamp } 3342ac27a0ecSDave Kleikamp 3343ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3344ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3345ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3346b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3347ce40733cSAneesh Kumar K.V blocksize); 3348ac27a0ecSDave Kleikamp goto failed_mount; 3349ac27a0ecSDave Kleikamp } 3350ac27a0ecSDave Kleikamp 3351ac27a0ecSDave Kleikamp brelse(bh); 335270bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 335370bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 335470bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3355ac27a0ecSDave Kleikamp if (!bh) { 3356b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3357b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3358ac27a0ecSDave Kleikamp goto failed_mount; 3359ac27a0ecSDave Kleikamp } 3360617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 3361ac27a0ecSDave Kleikamp sbi->s_es = es; 3362617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3363b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3364b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3365ac27a0ecSDave Kleikamp goto failed_mount; 3366ac27a0ecSDave Kleikamp } 3367ac27a0ecSDave Kleikamp } 3368ac27a0ecSDave Kleikamp 3369a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3370a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3371f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3372f287a1a5STheodore Ts'o has_huge_files); 3373f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3374ac27a0ecSDave Kleikamp 3375617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3376617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3377617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3378ac27a0ecSDave Kleikamp } else { 3379ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3380ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3381617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 33821330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3383ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3384b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3385b31e1552SEric Sandeen "unsupported inode size: %d", 3386ac27a0ecSDave Kleikamp sbi->s_inode_size); 3387ac27a0ecSDave Kleikamp goto failed_mount; 3388ac27a0ecSDave Kleikamp } 3389ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3390ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3391ac27a0ecSDave Kleikamp } 33920b8e58a1SAndreas Dilger 33930d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 33940d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 33958fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 33960d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3397d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3398b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3399b31e1552SEric Sandeen "unsupported descriptor size %lu", 34000d1ee42fSAlexandre Ratchov sbi->s_desc_size); 34010d1ee42fSAlexandre Ratchov goto failed_mount; 34020d1ee42fSAlexandre Ratchov } 34030d1ee42fSAlexandre Ratchov } else 34040d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 34050b8e58a1SAndreas Dilger 3406ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3407ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3408b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3409617ba13bSMingming Cao goto cantfind_ext4; 34100b8e58a1SAndreas Dilger 3411617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3412ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3413617ba13bSMingming Cao goto cantfind_ext4; 3414ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3415ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 34160d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3417ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3418ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3419e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3420e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 34210b8e58a1SAndreas Dilger 3422ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3423ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3424ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3425f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3426f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3427f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3428f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3429f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3430f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3431f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3432f99b2589STheodore Ts'o #else 3433f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3434f99b2589STheodore Ts'o #endif 3435f99b2589STheodore Ts'o sb->s_dirt = 1; 3436f99b2589STheodore Ts'o } 3437ac27a0ecSDave Kleikamp 3438281b5995STheodore Ts'o /* Handle clustersize */ 3439281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3440281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3441281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3442281b5995STheodore Ts'o if (has_bigalloc) { 3443281b5995STheodore Ts'o if (clustersize < blocksize) { 3444281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3445281b5995STheodore Ts'o "cluster size (%d) smaller than " 3446281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3447281b5995STheodore Ts'o goto failed_mount; 3448281b5995STheodore Ts'o } 3449281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3450281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3451281b5995STheodore Ts'o sbi->s_clusters_per_group = 3452281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3453281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3454281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3455281b5995STheodore Ts'o "#clusters per group too big: %lu", 3456281b5995STheodore Ts'o sbi->s_clusters_per_group); 3457281b5995STheodore Ts'o goto failed_mount; 3458281b5995STheodore Ts'o } 3459281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3460281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3461281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3462281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3463281b5995STheodore Ts'o sbi->s_blocks_per_group, 3464281b5995STheodore Ts'o sbi->s_clusters_per_group); 3465281b5995STheodore Ts'o goto failed_mount; 3466281b5995STheodore Ts'o } 3467281b5995STheodore Ts'o } else { 3468281b5995STheodore Ts'o if (clustersize != blocksize) { 3469281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3470281b5995STheodore Ts'o "block size (%d)", clustersize, 3471281b5995STheodore Ts'o blocksize); 3472281b5995STheodore Ts'o clustersize = blocksize; 3473281b5995STheodore Ts'o } 3474ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3475b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3476b31e1552SEric Sandeen "#blocks per group too big: %lu", 3477ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3478ac27a0ecSDave Kleikamp goto failed_mount; 3479ac27a0ecSDave Kleikamp } 3480281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3481281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3482281b5995STheodore Ts'o } 3483281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3484281b5995STheodore Ts'o 3485ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3486b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3487b31e1552SEric Sandeen "#inodes per group too big: %lu", 3488ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3489ac27a0ecSDave Kleikamp goto failed_mount; 3490ac27a0ecSDave Kleikamp } 3491ac27a0ecSDave Kleikamp 3492bf43d84bSEric Sandeen /* 3493bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3494bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3495bf43d84bSEric Sandeen */ 34965a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 349730ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 34985a9ae68aSDarrick J. Wong if (err) { 3499b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3500bf43d84bSEric Sandeen " too large to mount safely on this system"); 3501ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 350290c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 35035a9ae68aSDarrick J. Wong ret = err; 3504ac27a0ecSDave Kleikamp goto failed_mount; 3505ac27a0ecSDave Kleikamp } 3506ac27a0ecSDave Kleikamp 3507617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3508617ba13bSMingming Cao goto cantfind_ext4; 3509e7c95593SEric Sandeen 35100f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 35110f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 35120f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3513b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3514b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 35150f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 35160f2ddca6SFrom: Thiemo Nagel goto failed_mount; 35170f2ddca6SFrom: Thiemo Nagel } 35180f2ddca6SFrom: Thiemo Nagel 35194ec11028STheodore Ts'o /* 35204ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 35214ec11028STheodore Ts'o * of the filesystem. 35224ec11028STheodore Ts'o */ 35234ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3524b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3525b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3526e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 35274ec11028STheodore Ts'o ext4_blocks_count(es)); 3528e7c95593SEric Sandeen goto failed_mount; 3529e7c95593SEric Sandeen } 3530bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3531bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3532bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3533bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 35344ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3535b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 35364ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3537b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 35384ec11028STheodore Ts'o ext4_blocks_count(es), 35394ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 35404ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 35414ec11028STheodore Ts'o goto failed_mount; 35424ec11028STheodore Ts'o } 3543bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3544fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3545fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3546617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3547617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3548f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3549f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3550ac27a0ecSDave Kleikamp GFP_KERNEL); 3551ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3552b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 3553ac27a0ecSDave Kleikamp goto failed_mount; 3554ac27a0ecSDave Kleikamp } 3555ac27a0ecSDave Kleikamp 35569f6200bbSTheodore Ts'o if (ext4_proc_root) 35579f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3558240799cdSTheodore Ts'o 3559705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3560ac27a0ecSDave Kleikamp 3561ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 356270bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3563ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3564ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3565b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3566b31e1552SEric Sandeen "can't read group descriptor %d", i); 3567ac27a0ecSDave Kleikamp db_count = i; 3568ac27a0ecSDave Kleikamp goto failed_mount2; 3569ac27a0ecSDave Kleikamp } 3570ac27a0ecSDave Kleikamp } 3571bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3572b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3573ac27a0ecSDave Kleikamp goto failed_mount2; 3574ac27a0ecSDave Kleikamp } 3575772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3576772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3577b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3578b31e1552SEric Sandeen "unable to initialize " 3579b31e1552SEric Sandeen "flex_bg meta info!"); 3580772cb7c8SJose R. Santos goto failed_mount2; 3581772cb7c8SJose R. Santos } 3582772cb7c8SJose R. Santos 3583ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3584ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3585ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3586ac27a0ecSDave Kleikamp 358704496411STao Ma init_timer(&sbi->s_err_report); 358804496411STao Ma sbi->s_err_report.function = print_daily_error_info; 358904496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 359004496411STao Ma 359157042651STheodore Ts'o err = percpu_counter_init(&sbi->s_freeclusters_counter, 35925dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3593ce7e010aSTheodore Ts'o if (!err) { 3594ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3595ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3596ce7e010aSTheodore Ts'o } 3597ce7e010aSTheodore Ts'o if (!err) { 3598ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3599ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3600ce7e010aSTheodore Ts'o } 3601ce7e010aSTheodore Ts'o if (!err) { 360257042651STheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); 3603ce7e010aSTheodore Ts'o } 3604ce7e010aSTheodore Ts'o if (err) { 3605ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 3606ce7e010aSTheodore Ts'o goto failed_mount3; 3607ce7e010aSTheodore Ts'o } 3608ce7e010aSTheodore Ts'o 3609c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 361055138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 3611c9de560dSAlex Tomas 3612ac27a0ecSDave Kleikamp /* 3613ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3614ac27a0ecSDave Kleikamp */ 36159ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 36169ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3617617ba13bSMingming Cao sb->s_op = &ext4_sops; 36189ca92389STheodore Ts'o else 36199ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3620617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3621617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3622ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3623617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 3624617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3625ac27a0ecSDave Kleikamp #endif 3626f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3627f2fa2ffcSAneesh Kumar K.V 3628ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 36293b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 36308f82f840SYongqiang Yang sbi->s_resize_flags = 0; 3631ac27a0ecSDave Kleikamp 3632ac27a0ecSDave Kleikamp sb->s_root = NULL; 3633ac27a0ecSDave Kleikamp 3634ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3635617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3636617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3637ac27a0ecSDave Kleikamp 3638c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3639c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3640c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 3641c5e06d10SJohann Lombardi goto failed_mount3; 3642c5e06d10SJohann Lombardi 3643ac27a0ecSDave Kleikamp /* 3644ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3645ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3646ac27a0ecSDave Kleikamp */ 3647ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3648617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3649617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3650ac27a0ecSDave Kleikamp goto failed_mount3; 36510390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 36520390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3653b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3654b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3655744692dcSJiaying Zhang goto failed_mount_wq; 3656ac27a0ecSDave Kleikamp } else { 3657fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 36580390131bSFrank Mayhar sbi->s_journal = NULL; 36590390131bSFrank Mayhar needs_recovery = 0; 36600390131bSFrank Mayhar goto no_journal; 3661ac27a0ecSDave Kleikamp } 3662ac27a0ecSDave Kleikamp 3663eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 3664eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3665eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3666b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3667744692dcSJiaying Zhang goto failed_mount_wq; 3668eb40a09cSJose R. Santos } 3669eb40a09cSJose R. Santos 3670d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 3671d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 3672d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3673d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3674d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 3675818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 3676818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 3677818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3678818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3679d4da6c9cSLinus Torvalds } else { 3680d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 3681d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3682d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3683d4da6c9cSLinus Torvalds } 3684818d276cSGirish Shilamkar 3685ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3686ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3687ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3688ac27a0ecSDave Kleikamp case 0: 3689ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 369063f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 369163f57933SAndrew Morton * cope, else JOURNAL_DATA 369263f57933SAndrew Morton */ 3693dab291afSMingming Cao if (jbd2_journal_check_available_features 3694dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3695fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3696ac27a0ecSDave Kleikamp else 3697fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3698ac27a0ecSDave Kleikamp break; 3699ac27a0ecSDave Kleikamp 3700617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3701617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3702dab291afSMingming Cao if (!jbd2_journal_check_available_features 3703dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3704b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3705b31e1552SEric Sandeen "requested data journaling mode"); 3706744692dcSJiaying Zhang goto failed_mount_wq; 3707ac27a0ecSDave Kleikamp } 3708ac27a0ecSDave Kleikamp default: 3709ac27a0ecSDave Kleikamp break; 3710ac27a0ecSDave Kleikamp } 3711b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3712ac27a0ecSDave Kleikamp 3713*18aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 3714*18aadd47SBobi Jam 3715ce7e010aSTheodore Ts'o /* 3716ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 3717ce7e010aSTheodore Ts'o * need to update the global counters. 3718ce7e010aSTheodore Ts'o */ 371957042651STheodore Ts'o percpu_counter_set(&sbi->s_freeclusters_counter, 37205dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3721ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 372284061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 3723ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 372484061e07SDmitry Monakhov ext4_count_dirs(sb)); 372557042651STheodore Ts'o percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); 3726206f7ab4SChristoph Hellwig 3727ce7e010aSTheodore Ts'o no_journal: 3728fd89d5f2STejun Heo /* 3729fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 3730fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 3731fd89d5f2STejun Heo */ 3732fd89d5f2STejun Heo EXT4_SB(sb)->dio_unwritten_wq = 3733ae005cbeSLinus Torvalds alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 37344c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 37354c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 37364c0425ffSMingming Cao goto failed_mount_wq; 37374c0425ffSMingming Cao } 37384c0425ffSMingming Cao 3739ac27a0ecSDave Kleikamp /* 3740dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3741ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3742ac27a0ecSDave Kleikamp */ 3743ac27a0ecSDave Kleikamp 37441d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 37451d1fe1eeSDavid Howells if (IS_ERR(root)) { 3746b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 37471d1fe1eeSDavid Howells ret = PTR_ERR(root); 374832a9bb57SManish Katiyar root = NULL; 3749ac27a0ecSDave Kleikamp goto failed_mount4; 3750ac27a0ecSDave Kleikamp } 3751ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3752b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 375394bf608aSAl Viro iput(root); 3754ac27a0ecSDave Kleikamp goto failed_mount4; 3755ac27a0ecSDave Kleikamp } 37561d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 37571d1fe1eeSDavid Howells if (!sb->s_root) { 375894bf608aSAl Viro iput(root); 3759b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 37601d1fe1eeSDavid Howells ret = -ENOMEM; 37611d1fe1eeSDavid Howells goto failed_mount4; 37621d1fe1eeSDavid Howells } 3763ac27a0ecSDave Kleikamp 3764617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 3765ef7f3835SKalpak Shah 3766ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3767ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3768ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3769ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3770ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3771ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3772ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3773ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3774ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3775ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3776ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3777ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3778ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3779ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3780ef7f3835SKalpak Shah } 3781ef7f3835SKalpak Shah } 3782ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3783ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3784ef7f3835SKalpak Shah sbi->s_inode_size) { 3785ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3786ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3787b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3788b31e1552SEric Sandeen "available"); 3789ef7f3835SKalpak Shah } 3790ef7f3835SKalpak Shah 37916fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 37926fd058f7STheodore Ts'o if (err) { 3793b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3794fbe845ddSCurt Wohlgemuth "zone (%d)", err); 379594bf608aSAl Viro goto failed_mount4a; 37966fd058f7STheodore Ts'o } 37976fd058f7STheodore Ts'o 3798c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 3799c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 3800c2774d84SAneesh Kumar K.V if (err) { 3801421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3802c2774d84SAneesh Kumar K.V err); 3803dcf2d804STao Ma goto failed_mount5; 3804c2774d84SAneesh Kumar K.V } 3805c2774d84SAneesh Kumar K.V 3806bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3807bfff6873SLukas Czerner if (err) 3808dcf2d804STao Ma goto failed_mount6; 3809bfff6873SLukas Czerner 38103197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 38113197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 38123197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 38133197ebdbSTheodore Ts'o "%s", sb->s_id); 3814dcf2d804STao Ma if (err) 3815dcf2d804STao Ma goto failed_mount7; 38163197ebdbSTheodore Ts'o 3817617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3818617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3819617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 38200390131bSFrank Mayhar if (needs_recovery) { 3821b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3822617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 38230390131bSFrank Mayhar } 38240390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 38250390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 38260390131bSFrank Mayhar descr = " journalled data mode"; 38270390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 38280390131bSFrank Mayhar descr = " ordered data mode"; 38290390131bSFrank Mayhar else 38300390131bSFrank Mayhar descr = " writeback data mode"; 38310390131bSFrank Mayhar } else 38320390131bSFrank Mayhar descr = "out journal"; 38330390131bSFrank Mayhar 3834d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 38358b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 38368b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 3837ac27a0ecSDave Kleikamp 383866e61a9eSTheodore Ts'o if (es->s_error_count) 383966e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 3840ac27a0ecSDave Kleikamp 3841d4c402d9SCurt Wohlgemuth kfree(orig_data); 3842ac27a0ecSDave Kleikamp return 0; 3843ac27a0ecSDave Kleikamp 3844617ba13bSMingming Cao cantfind_ext4: 3845ac27a0ecSDave Kleikamp if (!silent) 3846b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3847ac27a0ecSDave Kleikamp goto failed_mount; 3848ac27a0ecSDave Kleikamp 3849dcf2d804STao Ma failed_mount7: 3850dcf2d804STao Ma ext4_unregister_li_request(sb); 3851dcf2d804STao Ma failed_mount6: 3852dcf2d804STao Ma ext4_mb_release(sb); 385394bf608aSAl Viro failed_mount5: 385494bf608aSAl Viro ext4_ext_release(sb); 3855dcf2d804STao Ma ext4_release_system_zone(sb); 385694bf608aSAl Viro failed_mount4a: 385794bf608aSAl Viro dput(sb->s_root); 385832a9bb57SManish Katiyar sb->s_root = NULL; 385994bf608aSAl Viro failed_mount4: 3860b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 38614c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 38624c0425ffSMingming Cao failed_mount_wq: 38630390131bSFrank Mayhar if (sbi->s_journal) { 3864dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 386547b4a50bSJan Kara sbi->s_journal = NULL; 38660390131bSFrank Mayhar } 3867ac27a0ecSDave Kleikamp failed_mount3: 386804496411STao Ma del_timer(&sbi->s_err_report); 38699933fc0aSTheodore Ts'o if (sbi->s_flex_groups) 38709933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 387157042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 3872ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 3873ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 387457042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 3875c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 3876c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 3877ac27a0ecSDave Kleikamp failed_mount2: 3878ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 3879ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 3880f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 3881ac27a0ecSDave Kleikamp failed_mount: 3882240799cdSTheodore Ts'o if (sbi->s_proc) { 38839f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 3884240799cdSTheodore Ts'o } 3885ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3886ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3887ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3888ac27a0ecSDave Kleikamp #endif 3889617ba13bSMingming Cao ext4_blkdev_remove(sbi); 3890ac27a0ecSDave Kleikamp brelse(bh); 3891ac27a0ecSDave Kleikamp out_fail: 3892ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 3893f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 3894ac27a0ecSDave Kleikamp kfree(sbi); 3895dcc7dae3SCyrill Gorcunov out_free_orig: 3896d4c402d9SCurt Wohlgemuth kfree(orig_data); 38971d1fe1eeSDavid Howells return ret; 3898ac27a0ecSDave Kleikamp } 3899ac27a0ecSDave Kleikamp 3900ac27a0ecSDave Kleikamp /* 3901ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 3902ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 3903ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 3904ac27a0ecSDave Kleikamp */ 3905617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3906ac27a0ecSDave Kleikamp { 3907617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3908ac27a0ecSDave Kleikamp 3909ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 391030773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 391130773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3912ac27a0ecSDave Kleikamp 3913a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 3914ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3915dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3916ac27a0ecSDave Kleikamp else 3917dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 39185bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 39195bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 39205bf5683aSHidehiro Kawai else 39215bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3922a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 3923ac27a0ecSDave Kleikamp } 3924ac27a0ecSDave Kleikamp 3925617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3926ac27a0ecSDave Kleikamp unsigned int journal_inum) 3927ac27a0ecSDave Kleikamp { 3928ac27a0ecSDave Kleikamp struct inode *journal_inode; 3929ac27a0ecSDave Kleikamp journal_t *journal; 3930ac27a0ecSDave Kleikamp 39310390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 39320390131bSFrank Mayhar 3933ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3934ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3935ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3936ac27a0ecSDave Kleikamp 39371d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 39381d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3939b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3940ac27a0ecSDave Kleikamp return NULL; 3941ac27a0ecSDave Kleikamp } 3942ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3943ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3944ac27a0ecSDave Kleikamp iput(journal_inode); 3945b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3946ac27a0ecSDave Kleikamp return NULL; 3947ac27a0ecSDave Kleikamp } 3948ac27a0ecSDave Kleikamp 3949e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3950ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 39511d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3952b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3953ac27a0ecSDave Kleikamp iput(journal_inode); 3954ac27a0ecSDave Kleikamp return NULL; 3955ac27a0ecSDave Kleikamp } 3956ac27a0ecSDave Kleikamp 3957dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3958ac27a0ecSDave Kleikamp if (!journal) { 3959b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3960ac27a0ecSDave Kleikamp iput(journal_inode); 3961ac27a0ecSDave Kleikamp return NULL; 3962ac27a0ecSDave Kleikamp } 3963ac27a0ecSDave Kleikamp journal->j_private = sb; 3964617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3965ac27a0ecSDave Kleikamp return journal; 3966ac27a0ecSDave Kleikamp } 3967ac27a0ecSDave Kleikamp 3968617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3969ac27a0ecSDave Kleikamp dev_t j_dev) 3970ac27a0ecSDave Kleikamp { 3971ac27a0ecSDave Kleikamp struct buffer_head *bh; 3972ac27a0ecSDave Kleikamp journal_t *journal; 3973617ba13bSMingming Cao ext4_fsblk_t start; 3974617ba13bSMingming Cao ext4_fsblk_t len; 3975ac27a0ecSDave Kleikamp int hblock, blocksize; 3976617ba13bSMingming Cao ext4_fsblk_t sb_block; 3977ac27a0ecSDave Kleikamp unsigned long offset; 3978617ba13bSMingming Cao struct ext4_super_block *es; 3979ac27a0ecSDave Kleikamp struct block_device *bdev; 3980ac27a0ecSDave Kleikamp 39810390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 39820390131bSFrank Mayhar 3983b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3984ac27a0ecSDave Kleikamp if (bdev == NULL) 3985ac27a0ecSDave Kleikamp return NULL; 3986ac27a0ecSDave Kleikamp 3987ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3988e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3989ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3990b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3991b31e1552SEric Sandeen "blocksize too small for journal device"); 3992ac27a0ecSDave Kleikamp goto out_bdev; 3993ac27a0ecSDave Kleikamp } 3994ac27a0ecSDave Kleikamp 3995617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3996617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3997ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3998ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3999b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4000b31e1552SEric Sandeen "external journal"); 4001ac27a0ecSDave Kleikamp goto out_bdev; 4002ac27a0ecSDave Kleikamp } 4003ac27a0ecSDave Kleikamp 4004617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 4005617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4006ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4007617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4008b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4009b31e1552SEric Sandeen "bad superblock"); 4010ac27a0ecSDave Kleikamp brelse(bh); 4011ac27a0ecSDave Kleikamp goto out_bdev; 4012ac27a0ecSDave Kleikamp } 4013ac27a0ecSDave Kleikamp 4014617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4015b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4016ac27a0ecSDave Kleikamp brelse(bh); 4017ac27a0ecSDave Kleikamp goto out_bdev; 4018ac27a0ecSDave Kleikamp } 4019ac27a0ecSDave Kleikamp 4020bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4021ac27a0ecSDave Kleikamp start = sb_block + 1; 4022ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4023ac27a0ecSDave Kleikamp 4024dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4025ac27a0ecSDave Kleikamp start, len, blocksize); 4026ac27a0ecSDave Kleikamp if (!journal) { 4027b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4028ac27a0ecSDave Kleikamp goto out_bdev; 4029ac27a0ecSDave Kleikamp } 4030ac27a0ecSDave Kleikamp journal->j_private = sb; 4031ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 4032ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4033ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4034b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4035ac27a0ecSDave Kleikamp goto out_journal; 4036ac27a0ecSDave Kleikamp } 4037ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4038b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4039b31e1552SEric Sandeen "user (unsupported) - %d", 4040ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4041ac27a0ecSDave Kleikamp goto out_journal; 4042ac27a0ecSDave Kleikamp } 4043617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4044617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4045ac27a0ecSDave Kleikamp return journal; 40460b8e58a1SAndreas Dilger 4047ac27a0ecSDave Kleikamp out_journal: 4048dab291afSMingming Cao jbd2_journal_destroy(journal); 4049ac27a0ecSDave Kleikamp out_bdev: 4050617ba13bSMingming Cao ext4_blkdev_put(bdev); 4051ac27a0ecSDave Kleikamp return NULL; 4052ac27a0ecSDave Kleikamp } 4053ac27a0ecSDave Kleikamp 4054617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4055617ba13bSMingming Cao struct ext4_super_block *es, 4056ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4057ac27a0ecSDave Kleikamp { 4058ac27a0ecSDave Kleikamp journal_t *journal; 4059ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4060ac27a0ecSDave Kleikamp dev_t journal_dev; 4061ac27a0ecSDave Kleikamp int err = 0; 4062ac27a0ecSDave Kleikamp int really_read_only; 4063ac27a0ecSDave Kleikamp 40640390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 40650390131bSFrank Mayhar 4066ac27a0ecSDave Kleikamp if (journal_devnum && 4067ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4068b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4069b31e1552SEric Sandeen "numbers have changed"); 4070ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4071ac27a0ecSDave Kleikamp } else 4072ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4073ac27a0ecSDave Kleikamp 4074ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4075ac27a0ecSDave Kleikamp 4076ac27a0ecSDave Kleikamp /* 4077ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4078ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4079ac27a0ecSDave Kleikamp * can get read-write access to the device. 4080ac27a0ecSDave Kleikamp */ 4081617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4082ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4083b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4084b31e1552SEric Sandeen "required on readonly filesystem"); 4085ac27a0ecSDave Kleikamp if (really_read_only) { 4086b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4087b31e1552SEric Sandeen "unavailable, cannot proceed"); 4088ac27a0ecSDave Kleikamp return -EROFS; 4089ac27a0ecSDave Kleikamp } 4090b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4091b31e1552SEric Sandeen "be enabled during recovery"); 4092ac27a0ecSDave Kleikamp } 4093ac27a0ecSDave Kleikamp } 4094ac27a0ecSDave Kleikamp 4095ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4096b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4097b31e1552SEric Sandeen "and inode journals!"); 4098ac27a0ecSDave Kleikamp return -EINVAL; 4099ac27a0ecSDave Kleikamp } 4100ac27a0ecSDave Kleikamp 4101ac27a0ecSDave Kleikamp if (journal_inum) { 4102617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4103ac27a0ecSDave Kleikamp return -EINVAL; 4104ac27a0ecSDave Kleikamp } else { 4105617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4106ac27a0ecSDave Kleikamp return -EINVAL; 4107ac27a0ecSDave Kleikamp } 4108ac27a0ecSDave Kleikamp 410990576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4110b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 41114776004fSTheodore Ts'o 4112ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 4113dab291afSMingming Cao err = jbd2_journal_update_format(journal); 4114ac27a0ecSDave Kleikamp if (err) { 4115b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 4116dab291afSMingming Cao jbd2_journal_destroy(journal); 4117ac27a0ecSDave Kleikamp return err; 4118ac27a0ecSDave Kleikamp } 4119ac27a0ecSDave Kleikamp } 4120ac27a0ecSDave Kleikamp 4121617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4122dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 41231c13d5c0STheodore Ts'o if (!err) { 41241c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 41251c13d5c0STheodore Ts'o if (save) 41261c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 41271c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4128dab291afSMingming Cao err = jbd2_journal_load(journal); 41291c13d5c0STheodore Ts'o if (save) 41301c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 41311c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 41321c13d5c0STheodore Ts'o kfree(save); 41331c13d5c0STheodore Ts'o } 4134ac27a0ecSDave Kleikamp 4135ac27a0ecSDave Kleikamp if (err) { 4136b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4137dab291afSMingming Cao jbd2_journal_destroy(journal); 4138ac27a0ecSDave Kleikamp return err; 4139ac27a0ecSDave Kleikamp } 4140ac27a0ecSDave Kleikamp 4141617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4142617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4143ac27a0ecSDave Kleikamp 4144c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4145ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4146ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4147ac27a0ecSDave Kleikamp 4148ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4149e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4150ac27a0ecSDave Kleikamp } 4151ac27a0ecSDave Kleikamp 4152ac27a0ecSDave Kleikamp return 0; 4153ac27a0ecSDave Kleikamp } 4154ac27a0ecSDave Kleikamp 4155e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4156ac27a0ecSDave Kleikamp { 4157e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4158617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4159c4be0c1dSTakashi Sato int error = 0; 4160ac27a0ecSDave Kleikamp 41617c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4162c4be0c1dSTakashi Sato return error; 4163914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4164914258bfSTheodore Ts'o /* 4165914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4166914258bfSTheodore Ts'o * superblock failed. This could happen because the 4167914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4168914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4169914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4170914258bfSTheodore Ts'o * write and hope for the best. 4171914258bfSTheodore Ts'o */ 4172b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4173b31e1552SEric Sandeen "superblock detected"); 4174914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4175914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4176914258bfSTheodore Ts'o } 417771290b36STheodore Ts'o /* 417871290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 417971290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 418071290b36STheodore Ts'o * write time when we are mounting the root file system 418171290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 418271290b36STheodore Ts'o * for people who are east of GMT and who make their clock 418371290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 418471290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 418571290b36STheodore Ts'o * to complain and force a full file system check. 418671290b36STheodore Ts'o */ 418771290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4188ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4189f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4190afc32f7eSTheodore Ts'o es->s_kbytes_written = 4191afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4192afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4193afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4194f613dfcbSTheodore Ts'o else 4195f613dfcbSTheodore Ts'o es->s_kbytes_written = 4196f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 419757042651STheodore Ts'o ext4_free_blocks_count_set(es, 419857042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 419957042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 42007f93cff9STheodore Ts'o es->s_free_inodes_count = 42017f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 42025d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 42037234ab2aSTheodore Ts'o sb->s_dirt = 0; 4204ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 4205ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4206914258bfSTheodore Ts'o if (sync) { 4207c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4208c4be0c1dSTakashi Sato if (error) 4209c4be0c1dSTakashi Sato return error; 4210c4be0c1dSTakashi Sato 4211c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4212c4be0c1dSTakashi Sato if (error) { 4213b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4214b31e1552SEric Sandeen "superblock"); 4215914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4216914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4217914258bfSTheodore Ts'o } 4218914258bfSTheodore Ts'o } 4219c4be0c1dSTakashi Sato return error; 4220ac27a0ecSDave Kleikamp } 4221ac27a0ecSDave Kleikamp 4222ac27a0ecSDave Kleikamp /* 4223ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4224ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4225ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4226ac27a0ecSDave Kleikamp */ 4227617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4228617ba13bSMingming Cao struct ext4_super_block *es) 4229ac27a0ecSDave Kleikamp { 4230617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4231ac27a0ecSDave Kleikamp 42320390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 42330390131bSFrank Mayhar BUG_ON(journal != NULL); 42340390131bSFrank Mayhar return; 42350390131bSFrank Mayhar } 4236dab291afSMingming Cao jbd2_journal_lock_updates(journal); 42377ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 42387ffe1ea8SHidehiro Kawai goto out; 42397ffe1ea8SHidehiro Kawai 4240617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4241ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4242617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4243e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4244ac27a0ecSDave Kleikamp } 42457ffe1ea8SHidehiro Kawai 42467ffe1ea8SHidehiro Kawai out: 4247dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4248ac27a0ecSDave Kleikamp } 4249ac27a0ecSDave Kleikamp 4250ac27a0ecSDave Kleikamp /* 4251ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4252ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4253ac27a0ecSDave Kleikamp * main filesystem now. 4254ac27a0ecSDave Kleikamp */ 4255617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4256617ba13bSMingming Cao struct ext4_super_block *es) 4257ac27a0ecSDave Kleikamp { 4258ac27a0ecSDave Kleikamp journal_t *journal; 4259ac27a0ecSDave Kleikamp int j_errno; 4260ac27a0ecSDave Kleikamp const char *errstr; 4261ac27a0ecSDave Kleikamp 42620390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 42630390131bSFrank Mayhar 4264617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4265ac27a0ecSDave Kleikamp 4266ac27a0ecSDave Kleikamp /* 4267ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4268617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4269ac27a0ecSDave Kleikamp */ 4270ac27a0ecSDave Kleikamp 4271dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4272ac27a0ecSDave Kleikamp if (j_errno) { 4273ac27a0ecSDave Kleikamp char nbuf[16]; 4274ac27a0ecSDave Kleikamp 4275617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 427612062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4277ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 427812062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4279ac27a0ecSDave Kleikamp 4280617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4281617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4282e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4283ac27a0ecSDave Kleikamp 4284dab291afSMingming Cao jbd2_journal_clear_err(journal); 4285ac27a0ecSDave Kleikamp } 4286ac27a0ecSDave Kleikamp } 4287ac27a0ecSDave Kleikamp 4288ac27a0ecSDave Kleikamp /* 4289ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4290ac27a0ecSDave Kleikamp * and wait on the commit. 4291ac27a0ecSDave Kleikamp */ 4292617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4293ac27a0ecSDave Kleikamp { 4294ac27a0ecSDave Kleikamp journal_t *journal; 42950390131bSFrank Mayhar int ret = 0; 4296ac27a0ecSDave Kleikamp 4297ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4298ac27a0ecSDave Kleikamp return 0; 4299ac27a0ecSDave Kleikamp 4300617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 43016b0310fbSEric Sandeen if (journal) { 4302437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 4303617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 43046b0310fbSEric Sandeen } 43050390131bSFrank Mayhar 4306ac27a0ecSDave Kleikamp return ret; 4307ac27a0ecSDave Kleikamp } 4308ac27a0ecSDave Kleikamp 4309617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 4310ac27a0ecSDave Kleikamp { 4311ebc1ac16SChristoph Hellwig lock_super(sb); 4312e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4313ebc1ac16SChristoph Hellwig unlock_super(sb); 43140390131bSFrank Mayhar } 4315ac27a0ecSDave Kleikamp 4316617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4317ac27a0ecSDave Kleikamp { 431814ce0cb4STheodore Ts'o int ret = 0; 43199eddacf9SJan Kara tid_t target; 43208d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4321ac27a0ecSDave Kleikamp 43229bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 43238d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 43248d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4325ac27a0ecSDave Kleikamp if (wait) 43268d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 43270390131bSFrank Mayhar } 432814ce0cb4STheodore Ts'o return ret; 4329ac27a0ecSDave Kleikamp } 4330ac27a0ecSDave Kleikamp 4331ac27a0ecSDave Kleikamp /* 4332ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4333ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4334be4f27d3SYongqiang Yang * 4335be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 4336be4f27d3SYongqiang Yang * state independently, because ext4 prevents a new handle from being started 4337be4f27d3SYongqiang Yang * by @sb->s_frozen, which stays in an upper layer. It thus needs help from 4338be4f27d3SYongqiang Yang * the upper layer. 4339ac27a0ecSDave Kleikamp */ 4340c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4341ac27a0ecSDave Kleikamp { 4342c4be0c1dSTakashi Sato int error = 0; 4343c4be0c1dSTakashi Sato journal_t *journal; 4344ac27a0ecSDave Kleikamp 43459ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 43469ca92389STheodore Ts'o return 0; 43479ca92389STheodore Ts'o 4348c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4349ac27a0ecSDave Kleikamp 4350ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4351dab291afSMingming Cao jbd2_journal_lock_updates(journal); 43527ffe1ea8SHidehiro Kawai 43537ffe1ea8SHidehiro Kawai /* 43549ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 43559ca92389STheodore Ts'o * the journal. 43567ffe1ea8SHidehiro Kawai */ 4357c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 43586b0310fbSEric Sandeen if (error < 0) 43596b0310fbSEric Sandeen goto out; 4360ac27a0ecSDave Kleikamp 4361ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4362617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4363e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 43646b0310fbSEric Sandeen out: 43656b0310fbSEric Sandeen /* we rely on s_frozen to stop further updates */ 43666b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 43676b0310fbSEric Sandeen return error; 4368ac27a0ecSDave Kleikamp } 4369ac27a0ecSDave Kleikamp 4370ac27a0ecSDave Kleikamp /* 4371ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4372ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4373ac27a0ecSDave Kleikamp */ 4374c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4375ac27a0ecSDave Kleikamp { 43769ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 43779ca92389STheodore Ts'o return 0; 43789ca92389STheodore Ts'o 4379ac27a0ecSDave Kleikamp lock_super(sb); 43809ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4381617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4382e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4383ac27a0ecSDave Kleikamp unlock_super(sb); 4384c4be0c1dSTakashi Sato return 0; 4385ac27a0ecSDave Kleikamp } 4386ac27a0ecSDave Kleikamp 4387673c6100STheodore Ts'o /* 4388673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4389673c6100STheodore Ts'o */ 4390673c6100STheodore Ts'o struct ext4_mount_options { 4391673c6100STheodore Ts'o unsigned long s_mount_opt; 4392a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 4393673c6100STheodore Ts'o uid_t s_resuid; 4394673c6100STheodore Ts'o gid_t s_resgid; 4395673c6100STheodore Ts'o unsigned long s_commit_interval; 4396673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4397673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4398673c6100STheodore Ts'o int s_jquota_fmt; 4399673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4400673c6100STheodore Ts'o #endif 4401673c6100STheodore Ts'o }; 4402673c6100STheodore Ts'o 4403617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4404ac27a0ecSDave Kleikamp { 4405617ba13bSMingming Cao struct ext4_super_block *es; 4406617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4407617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 4408ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4409617ba13bSMingming Cao struct ext4_mount_options old_opts; 4410c79d967dSChristoph Hellwig int enable_quota = 0; 44118a266467STheodore Ts'o ext4_group_t g; 4412b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4413c5e06d10SJohann Lombardi int err = 0; 4414ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4415ac27a0ecSDave Kleikamp int i; 4416ac27a0ecSDave Kleikamp #endif 4417d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4418ac27a0ecSDave Kleikamp 4419ac27a0ecSDave Kleikamp /* Store the original options */ 4420bbd6851aSAl Viro lock_super(sb); 4421ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4422ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4423a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4424ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4425ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4426ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 442730773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 442830773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4429ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4430ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4431ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4432ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 4433ac27a0ecSDave Kleikamp #endif 4434b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4435b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4436ac27a0ecSDave Kleikamp 4437ac27a0ecSDave Kleikamp /* 4438ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4439ac27a0ecSDave Kleikamp */ 4440b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 4441b3881f74STheodore Ts'o &n_blocks_count, 1)) { 4442ac27a0ecSDave Kleikamp err = -EINVAL; 4443ac27a0ecSDave Kleikamp goto restore_opts; 4444ac27a0ecSDave Kleikamp } 4445ac27a0ecSDave Kleikamp 44464ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4447c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4448ac27a0ecSDave Kleikamp 4449ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4450482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4451ac27a0ecSDave Kleikamp 4452ac27a0ecSDave Kleikamp es = sbi->s_es; 4453ac27a0ecSDave Kleikamp 4454b3881f74STheodore Ts'o if (sbi->s_journal) { 4455617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4456b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4457b3881f74STheodore Ts'o } 4458ac27a0ecSDave Kleikamp 4459ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 4460bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 44614ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4462ac27a0ecSDave Kleikamp err = -EROFS; 4463ac27a0ecSDave Kleikamp goto restore_opts; 4464ac27a0ecSDave Kleikamp } 4465ac27a0ecSDave Kleikamp 4466ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 44670f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 44680f0dd62fSChristoph Hellwig if (err < 0) 4469c79d967dSChristoph Hellwig goto restore_opts; 4470c79d967dSChristoph Hellwig 4471ac27a0ecSDave Kleikamp /* 4472ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4473ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4474ac27a0ecSDave Kleikamp */ 4475ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4476ac27a0ecSDave Kleikamp 4477ac27a0ecSDave Kleikamp /* 4478ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4479ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4480ac27a0ecSDave Kleikamp * mark the partition as valid again. 4481ac27a0ecSDave Kleikamp */ 4482617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4483617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4484ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4485ac27a0ecSDave Kleikamp 4486a63c9eb2STheodore Ts'o if (sbi->s_journal) 4487617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4488ac27a0ecSDave Kleikamp } else { 4489a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4490a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4491ac27a0ecSDave Kleikamp err = -EROFS; 4492ac27a0ecSDave Kleikamp goto restore_opts; 4493ac27a0ecSDave Kleikamp } 4494ead6596bSEric Sandeen /* 44958a266467STheodore Ts'o * Make sure the group descriptor checksums 44960b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 44978a266467STheodore Ts'o */ 44988a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 44998a266467STheodore Ts'o struct ext4_group_desc *gdp = 45008a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 45018a266467STheodore Ts'o 45028a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 4503b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4504b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 45058a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 45068a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 45078a266467STheodore Ts'o err = -EINVAL; 45088a266467STheodore Ts'o goto restore_opts; 45098a266467STheodore Ts'o } 45108a266467STheodore Ts'o } 45118a266467STheodore Ts'o 45128a266467STheodore Ts'o /* 4513ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4514ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4515ead6596bSEric Sandeen * require a full umount/remount for now. 4516ead6596bSEric Sandeen */ 4517ead6596bSEric Sandeen if (es->s_last_orphan) { 4518b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4519ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4520ead6596bSEric Sandeen "orphan inode list. Please " 4521b31e1552SEric Sandeen "umount/remount instead"); 4522ead6596bSEric Sandeen err = -EINVAL; 4523ead6596bSEric Sandeen goto restore_opts; 4524ead6596bSEric Sandeen } 4525ead6596bSEric Sandeen 4526ac27a0ecSDave Kleikamp /* 4527ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4528ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4529ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4530ac27a0ecSDave Kleikamp * the partition.) 4531ac27a0ecSDave Kleikamp */ 45320390131bSFrank Mayhar if (sbi->s_journal) 4533617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4534ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4535617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 4536ac27a0ecSDave Kleikamp goto restore_opts; 4537617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4538ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4539c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4540c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4541c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4542c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4543c5e06d10SJohann Lombardi err = -EROFS; 4544c5e06d10SJohann Lombardi goto restore_opts; 4545c5e06d10SJohann Lombardi } 4546c79d967dSChristoph Hellwig enable_quota = 1; 4547ac27a0ecSDave Kleikamp } 4548ac27a0ecSDave Kleikamp } 4549bfff6873SLukas Czerner 4550bfff6873SLukas Czerner /* 4551bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4552bfff6873SLukas Czerner * current settings 4553bfff6873SLukas Czerner */ 4554bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4555bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4556bfff6873SLukas Czerner else { 4557bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4558bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4559bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4560bfff6873SLukas Czerner } 4561bfff6873SLukas Czerner 45626fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 45630390131bSFrank Mayhar if (sbi->s_journal == NULL) 4564e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 45650390131bSFrank Mayhar 4566ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4567ac27a0ecSDave Kleikamp /* Release old quota file names */ 4568ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4569ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 4570ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4571ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 4572ac27a0ecSDave Kleikamp #endif 4573bbd6851aSAl Viro unlock_super(sb); 4574c79d967dSChristoph Hellwig if (enable_quota) 45750f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 4576d4c402d9SCurt Wohlgemuth 4577d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4578d4c402d9SCurt Wohlgemuth kfree(orig_data); 4579ac27a0ecSDave Kleikamp return 0; 45800b8e58a1SAndreas Dilger 4581ac27a0ecSDave Kleikamp restore_opts: 4582ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4583ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4584a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4585ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4586ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4587ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 458830773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 458930773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4590ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4591ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4592ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4593ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 4594ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4595ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4596ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4597ac27a0ecSDave Kleikamp } 4598ac27a0ecSDave Kleikamp #endif 4599bbd6851aSAl Viro unlock_super(sb); 4600d4c402d9SCurt Wohlgemuth kfree(orig_data); 4601ac27a0ecSDave Kleikamp return err; 4602ac27a0ecSDave Kleikamp } 4603ac27a0ecSDave Kleikamp 4604f975d6bcSTheodore Ts'o /* 4605f975d6bcSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 4606f975d6bcSTheodore Ts'o * historical BSD practice is quite difficult in the face of 4607f975d6bcSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 4608f975d6bcSTheodore Ts'o * different block group can end up in the same allocation cluster. 4609f975d6bcSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 4610f975d6bcSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 4611f975d6bcSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 4612f975d6bcSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 4613f975d6bcSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 4614f975d6bcSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 4615f975d6bcSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 4616f975d6bcSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 4617f975d6bcSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 4618f975d6bcSTheodore Ts'o */ 4619617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4620ac27a0ecSDave Kleikamp { 4621ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4622617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4623617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 4624f975d6bcSTheodore Ts'o struct ext4_group_desc *gdp; 4625960cc398SPekka Enberg u64 fsid; 4626d02a9391SKazuya Mio s64 bfree; 4627ac27a0ecSDave Kleikamp 46285e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 46295e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 4630f975d6bcSTheodore Ts'o } else if (es->s_overhead_clusters) { 4631f975d6bcSTheodore Ts'o sbi->s_overhead_last = le32_to_cpu(es->s_overhead_clusters); 46326bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 46338df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 46345e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 4635ac27a0ecSDave Kleikamp 4636ac27a0ecSDave Kleikamp /* 46375e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 46385e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 46395e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 4640ac27a0ecSDave Kleikamp */ 4641ac27a0ecSDave Kleikamp 4642ac27a0ecSDave Kleikamp /* 4643ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 4644ac27a0ecSDave Kleikamp * overhead 4645ac27a0ecSDave Kleikamp */ 4646f975d6bcSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4647ac27a0ecSDave Kleikamp 4648ac27a0ecSDave Kleikamp /* 4649f975d6bcSTheodore Ts'o * Add the overhead found in each block group 4650ac27a0ecSDave Kleikamp */ 4651ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 4652f975d6bcSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 4653f975d6bcSTheodore Ts'o overhead += ext4_num_overhead_clusters(sb, i, gdp); 4654ac27a0ecSDave Kleikamp cond_resched(); 4655ac27a0ecSDave Kleikamp } 46565e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 46575e70030dSBadari Pulavarty smp_wmb(); 46586bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 4659ac27a0ecSDave Kleikamp } 4660ac27a0ecSDave Kleikamp 4661617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4662ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 4663f975d6bcSTheodore Ts'o buf->f_blocks = (ext4_blocks_count(es) - 4664f975d6bcSTheodore Ts'o EXT4_C2B(sbi, sbi->s_overhead_last)); 466557042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 466657042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 4667d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 466857042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 4669bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 4670bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 4671ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4672ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 467352d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4674617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4675960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4676960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4677960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4678960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 46790b8e58a1SAndreas Dilger 4680ac27a0ecSDave Kleikamp return 0; 4681ac27a0ecSDave Kleikamp } 4682ac27a0ecSDave Kleikamp 46830b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 46840b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4685ac27a0ecSDave Kleikamp * Process 1 Process 2 4686617ba13bSMingming Cao * ext4_create() quota_sync() 4687dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4688871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4689dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4690ac27a0ecSDave Kleikamp * 4691ac27a0ecSDave Kleikamp */ 4692ac27a0ecSDave Kleikamp 4693ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4694ac27a0ecSDave Kleikamp 4695ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4696ac27a0ecSDave Kleikamp { 4697ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 4698ac27a0ecSDave Kleikamp } 4699ac27a0ecSDave Kleikamp 4700617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4701ac27a0ecSDave Kleikamp { 4702ac27a0ecSDave Kleikamp int ret, err; 4703ac27a0ecSDave Kleikamp handle_t *handle; 4704ac27a0ecSDave Kleikamp struct inode *inode; 4705ac27a0ecSDave Kleikamp 4706ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 4707617ba13bSMingming Cao handle = ext4_journal_start(inode, 4708617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4709ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4710ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4711ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4712617ba13bSMingming Cao err = ext4_journal_stop(handle); 4713ac27a0ecSDave Kleikamp if (!ret) 4714ac27a0ecSDave Kleikamp ret = err; 4715ac27a0ecSDave Kleikamp return ret; 4716ac27a0ecSDave Kleikamp } 4717ac27a0ecSDave Kleikamp 4718617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4719ac27a0ecSDave Kleikamp { 4720ac27a0ecSDave Kleikamp int ret, err; 4721ac27a0ecSDave Kleikamp handle_t *handle; 4722ac27a0ecSDave Kleikamp 4723617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4724617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4725ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4726ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4727ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4728617ba13bSMingming Cao err = ext4_journal_stop(handle); 4729ac27a0ecSDave Kleikamp if (!ret) 4730ac27a0ecSDave Kleikamp ret = err; 4731ac27a0ecSDave Kleikamp return ret; 4732ac27a0ecSDave Kleikamp } 4733ac27a0ecSDave Kleikamp 4734617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4735ac27a0ecSDave Kleikamp { 4736ac27a0ecSDave Kleikamp int ret, err; 4737ac27a0ecSDave Kleikamp handle_t *handle; 4738ac27a0ecSDave Kleikamp 4739617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4740617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 47419c3013e9SJan Kara if (IS_ERR(handle)) { 47429c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 47439c3013e9SJan Kara dquot_release(dquot); 4744ac27a0ecSDave Kleikamp return PTR_ERR(handle); 47459c3013e9SJan Kara } 4746ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4747617ba13bSMingming Cao err = ext4_journal_stop(handle); 4748ac27a0ecSDave Kleikamp if (!ret) 4749ac27a0ecSDave Kleikamp ret = err; 4750ac27a0ecSDave Kleikamp return ret; 4751ac27a0ecSDave Kleikamp } 4752ac27a0ecSDave Kleikamp 4753617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4754ac27a0ecSDave Kleikamp { 47552c8be6b2SJan Kara /* Are we journaling quotas? */ 4756617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 4757617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 4758ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4759617ba13bSMingming Cao return ext4_write_dquot(dquot); 4760ac27a0ecSDave Kleikamp } else { 4761ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4762ac27a0ecSDave Kleikamp } 4763ac27a0ecSDave Kleikamp } 4764ac27a0ecSDave Kleikamp 4765617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4766ac27a0ecSDave Kleikamp { 4767ac27a0ecSDave Kleikamp int ret, err; 4768ac27a0ecSDave Kleikamp handle_t *handle; 4769ac27a0ecSDave Kleikamp 4770ac27a0ecSDave Kleikamp /* Data block + inode block */ 4771617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 4772ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4773ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4774ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4775617ba13bSMingming Cao err = ext4_journal_stop(handle); 4776ac27a0ecSDave Kleikamp if (!ret) 4777ac27a0ecSDave Kleikamp ret = err; 4778ac27a0ecSDave Kleikamp return ret; 4779ac27a0ecSDave Kleikamp } 4780ac27a0ecSDave Kleikamp 4781ac27a0ecSDave Kleikamp /* 4782ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4783ac27a0ecSDave Kleikamp * the quota file and such... 4784ac27a0ecSDave Kleikamp */ 4785617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4786ac27a0ecSDave Kleikamp { 4787287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4788617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4789ac27a0ecSDave Kleikamp } 4790ac27a0ecSDave Kleikamp 4791ac27a0ecSDave Kleikamp /* 4792ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4793ac27a0ecSDave Kleikamp */ 4794617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4795f00c9e44SJan Kara struct path *path) 4796ac27a0ecSDave Kleikamp { 4797ac27a0ecSDave Kleikamp int err; 4798ac27a0ecSDave Kleikamp 4799ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4800ac27a0ecSDave Kleikamp return -EINVAL; 48010623543bSJan Kara 4802ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 4803d8c9584eSAl Viro if (path->dentry->d_sb != sb) 4804ac27a0ecSDave Kleikamp return -EXDEV; 48050623543bSJan Kara /* Journaling quota? */ 48060623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 48072b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 4808f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 4809b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4810b31e1552SEric Sandeen "Quota file not on filesystem root. " 4811b31e1552SEric Sandeen "Journaled quota will not work"); 48120623543bSJan Kara } 48130623543bSJan Kara 48140623543bSJan Kara /* 48150623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 48160623543bSJan Kara * all updates to the file when we bypass pagecache... 48170623543bSJan Kara */ 48180390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 4819f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 48200623543bSJan Kara /* 48210623543bSJan Kara * We don't need to lock updates but journal_flush() could 48220623543bSJan Kara * otherwise be livelocked... 48230623543bSJan Kara */ 48240623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 48257ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 48260623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 4827f00c9e44SJan Kara if (err) 48287ffe1ea8SHidehiro Kawai return err; 48297ffe1ea8SHidehiro Kawai } 48300623543bSJan Kara 4831f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 4832ac27a0ecSDave Kleikamp } 4833ac27a0ecSDave Kleikamp 4834ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 4835ca0e05e4SDmitry Monakhov { 483621f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 483721f97697SJan Kara handle_t *handle; 483821f97697SJan Kara 483987009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 484087009d86SDmitry Monakhov * Caller already holds s_umount sem */ 484187009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 4842ca0e05e4SDmitry Monakhov sync_filesystem(sb); 4843ca0e05e4SDmitry Monakhov 48440b268590SAmir Goldstein if (!inode) 48450b268590SAmir Goldstein goto out; 48460b268590SAmir Goldstein 484721f97697SJan Kara /* Update modification times of quota files when userspace can 484821f97697SJan Kara * start looking at them */ 484921f97697SJan Kara handle = ext4_journal_start(inode, 1); 485021f97697SJan Kara if (IS_ERR(handle)) 485121f97697SJan Kara goto out; 485221f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 485321f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 485421f97697SJan Kara ext4_journal_stop(handle); 485521f97697SJan Kara 485621f97697SJan Kara out: 4857ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 4858ca0e05e4SDmitry Monakhov } 4859ca0e05e4SDmitry Monakhov 4860ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 4861ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 4862ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 4863ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 4864617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 4865ac27a0ecSDave Kleikamp size_t len, loff_t off) 4866ac27a0ecSDave Kleikamp { 4867ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4868725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4869ac27a0ecSDave Kleikamp int err = 0; 4870ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4871ac27a0ecSDave Kleikamp int tocopy; 4872ac27a0ecSDave Kleikamp size_t toread; 4873ac27a0ecSDave Kleikamp struct buffer_head *bh; 4874ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 4875ac27a0ecSDave Kleikamp 4876ac27a0ecSDave Kleikamp if (off > i_size) 4877ac27a0ecSDave Kleikamp return 0; 4878ac27a0ecSDave Kleikamp if (off+len > i_size) 4879ac27a0ecSDave Kleikamp len = i_size-off; 4880ac27a0ecSDave Kleikamp toread = len; 4881ac27a0ecSDave Kleikamp while (toread > 0) { 4882ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 4883ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 4884617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 4885ac27a0ecSDave Kleikamp if (err) 4886ac27a0ecSDave Kleikamp return err; 4887ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 4888ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 4889ac27a0ecSDave Kleikamp else 4890ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 4891ac27a0ecSDave Kleikamp brelse(bh); 4892ac27a0ecSDave Kleikamp offset = 0; 4893ac27a0ecSDave Kleikamp toread -= tocopy; 4894ac27a0ecSDave Kleikamp data += tocopy; 4895ac27a0ecSDave Kleikamp blk++; 4896ac27a0ecSDave Kleikamp } 4897ac27a0ecSDave Kleikamp return len; 4898ac27a0ecSDave Kleikamp } 4899ac27a0ecSDave Kleikamp 4900ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 4901ac27a0ecSDave Kleikamp * enough credits) */ 4902617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 4903ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 4904ac27a0ecSDave Kleikamp { 4905ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4906725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4907ac27a0ecSDave Kleikamp int err = 0; 4908ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4909ac27a0ecSDave Kleikamp struct buffer_head *bh; 4910ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 4911ac27a0ecSDave Kleikamp 49120390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 4913b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4914b31e1552SEric Sandeen " cancelled because transaction is not started", 49159c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 49169c3013e9SJan Kara return -EIO; 49179c3013e9SJan Kara } 491867eeb568SDmitry Monakhov /* 491967eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 492067eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 492167eeb568SDmitry Monakhov */ 492267eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 492367eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 492467eeb568SDmitry Monakhov " cancelled because not block aligned", 492567eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 492667eeb568SDmitry Monakhov return -EIO; 492767eeb568SDmitry Monakhov } 492867eeb568SDmitry Monakhov 4929ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 4930617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 4931ac27a0ecSDave Kleikamp if (!bh) 4932ac27a0ecSDave Kleikamp goto out; 4933617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 4934ac27a0ecSDave Kleikamp if (err) { 4935ac27a0ecSDave Kleikamp brelse(bh); 4936ac27a0ecSDave Kleikamp goto out; 4937ac27a0ecSDave Kleikamp } 4938ac27a0ecSDave Kleikamp lock_buffer(bh); 493967eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 4940ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 4941ac27a0ecSDave Kleikamp unlock_buffer(bh); 49420390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 4943ac27a0ecSDave Kleikamp brelse(bh); 4944ac27a0ecSDave Kleikamp out: 494567eeb568SDmitry Monakhov if (err) { 49464d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 4947ac27a0ecSDave Kleikamp return err; 49484d04e4fbSJan Kara } 494967eeb568SDmitry Monakhov if (inode->i_size < off + len) { 495067eeb568SDmitry Monakhov i_size_write(inode, off + len); 4951617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 4952617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 495321f97697SJan Kara } 4954ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 495567eeb568SDmitry Monakhov return len; 4956ac27a0ecSDave Kleikamp } 4957ac27a0ecSDave Kleikamp 4958ac27a0ecSDave Kleikamp #endif 4959ac27a0ecSDave Kleikamp 4960152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 4961152a0836SAl Viro const char *dev_name, void *data) 4962ac27a0ecSDave Kleikamp { 4963152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 4964ac27a0ecSDave Kleikamp } 4965ac27a0ecSDave Kleikamp 496637f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 496724b58424STheodore Ts'o static inline void register_as_ext2(void) 496824b58424STheodore Ts'o { 496924b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 497024b58424STheodore Ts'o if (err) 497124b58424STheodore Ts'o printk(KERN_WARNING 497224b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 497324b58424STheodore Ts'o } 497424b58424STheodore Ts'o 497524b58424STheodore Ts'o static inline void unregister_as_ext2(void) 497624b58424STheodore Ts'o { 497724b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 497824b58424STheodore Ts'o } 49792035e776STheodore Ts'o 49802035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 49812035e776STheodore Ts'o { 49822035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 49832035e776STheodore Ts'o return 0; 49842035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 49852035e776STheodore Ts'o return 1; 49862035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 49872035e776STheodore Ts'o return 0; 49882035e776STheodore Ts'o return 1; 49892035e776STheodore Ts'o } 499051b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 499124b58424STheodore Ts'o #else 499224b58424STheodore Ts'o static inline void register_as_ext2(void) { } 499324b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 49942035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 499524b58424STheodore Ts'o #endif 499624b58424STheodore Ts'o 499737f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 499824b58424STheodore Ts'o static inline void register_as_ext3(void) 499924b58424STheodore Ts'o { 500024b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 500124b58424STheodore Ts'o if (err) 500224b58424STheodore Ts'o printk(KERN_WARNING 500324b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 500424b58424STheodore Ts'o } 500524b58424STheodore Ts'o 500624b58424STheodore Ts'o static inline void unregister_as_ext3(void) 500724b58424STheodore Ts'o { 500824b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 500924b58424STheodore Ts'o } 50102035e776STheodore Ts'o 50112035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 50122035e776STheodore Ts'o { 50132035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 50142035e776STheodore Ts'o return 0; 50152035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 50162035e776STheodore Ts'o return 0; 50172035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 50182035e776STheodore Ts'o return 1; 50192035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 50202035e776STheodore Ts'o return 0; 50212035e776STheodore Ts'o return 1; 50222035e776STheodore Ts'o } 502351b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 502424b58424STheodore Ts'o #else 502524b58424STheodore Ts'o static inline void register_as_ext3(void) { } 502624b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 50272035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 502824b58424STheodore Ts'o #endif 502924b58424STheodore Ts'o 503003010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5031ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 503203010a33STheodore Ts'o .name = "ext4", 5033152a0836SAl Viro .mount = ext4_mount, 5034ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5035ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5036ac27a0ecSDave Kleikamp }; 5037ac27a0ecSDave Kleikamp 50388f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5039857ac889SLukas Czerner { 5040857ac889SLukas Czerner struct ext4_features *ef; 5041857ac889SLukas Czerner int ret = -ENOMEM; 5042857ac889SLukas Czerner 5043857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5044857ac889SLukas Czerner if (!ef) 5045857ac889SLukas Czerner goto out; 5046857ac889SLukas Czerner 5047857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5048857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5049857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5050857ac889SLukas Czerner "features"); 5051857ac889SLukas Czerner if (ret) { 5052857ac889SLukas Czerner kfree(ef); 5053857ac889SLukas Czerner goto out; 5054857ac889SLukas Czerner } 5055857ac889SLukas Czerner 5056857ac889SLukas Czerner ext4_feat = ef; 5057857ac889SLukas Czerner ret = 0; 5058857ac889SLukas Czerner out: 5059857ac889SLukas Czerner return ret; 5060857ac889SLukas Czerner } 5061857ac889SLukas Czerner 50628f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 50638f021222SLukas Czerner { 50648f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 50658f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 50668f021222SLukas Czerner kfree(ext4_feat); 50678f021222SLukas Czerner } 50688f021222SLukas Czerner 5069e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5070e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5071e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5072e9e3bcecSEric Sandeen 50735dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5074ac27a0ecSDave Kleikamp { 5075e9e3bcecSEric Sandeen int i, err; 5076c9de560dSAlex Tomas 507712e9b892SDmitry Monakhov ext4_check_flag_values(); 5078e9e3bcecSEric Sandeen 5079e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5080e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5081e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5082e9e3bcecSEric Sandeen } 5083e9e3bcecSEric Sandeen 50845dabfc78STheodore Ts'o err = ext4_init_pageio(); 50856fd058f7STheodore Ts'o if (err) 50866fd058f7STheodore Ts'o return err; 50875dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5088bd2d0210STheodore Ts'o if (err) 5089d44651d0SFabrice Jouhaud goto out6; 50903197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 50913197ebdbSTheodore Ts'o if (!ext4_kset) 5092dd68314cSTheodore Ts'o goto out5; 5093d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5094857ac889SLukas Czerner 5095857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5096dd68314cSTheodore Ts'o if (err) 5097dd68314cSTheodore Ts'o goto out4; 5098857ac889SLukas Czerner 50995dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5100ac27a0ecSDave Kleikamp if (err) 51016fd058f7STheodore Ts'o goto out3; 5102c9de560dSAlex Tomas 51035dabfc78STheodore Ts'o err = ext4_init_xattr(); 5104c9de560dSAlex Tomas if (err) 5105c9de560dSAlex Tomas goto out2; 5106ac27a0ecSDave Kleikamp err = init_inodecache(); 5107ac27a0ecSDave Kleikamp if (err) 5108ac27a0ecSDave Kleikamp goto out1; 510924b58424STheodore Ts'o register_as_ext3(); 51102035e776STheodore Ts'o register_as_ext2(); 511103010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5112ac27a0ecSDave Kleikamp if (err) 5113ac27a0ecSDave Kleikamp goto out; 5114bfff6873SLukas Czerner 5115bfff6873SLukas Czerner ext4_li_info = NULL; 5116bfff6873SLukas Czerner mutex_init(&ext4_li_mtx); 5117ac27a0ecSDave Kleikamp return 0; 5118ac27a0ecSDave Kleikamp out: 511924b58424STheodore Ts'o unregister_as_ext2(); 512024b58424STheodore Ts'o unregister_as_ext3(); 5121ac27a0ecSDave Kleikamp destroy_inodecache(); 5122ac27a0ecSDave Kleikamp out1: 51235dabfc78STheodore Ts'o ext4_exit_xattr(); 5124c9de560dSAlex Tomas out2: 51255dabfc78STheodore Ts'o ext4_exit_mballoc(); 51266fd058f7STheodore Ts'o out3: 51278f021222SLukas Czerner ext4_exit_feat_adverts(); 51286fd058f7STheodore Ts'o out4: 5129d44651d0SFabrice Jouhaud if (ext4_proc_root) 5130dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5131dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5132d44651d0SFabrice Jouhaud out5: 5133dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5134d44651d0SFabrice Jouhaud out6: 51355dabfc78STheodore Ts'o ext4_exit_pageio(); 5136ac27a0ecSDave Kleikamp return err; 5137ac27a0ecSDave Kleikamp } 5138ac27a0ecSDave Kleikamp 51395dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5140ac27a0ecSDave Kleikamp { 5141bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 514224b58424STheodore Ts'o unregister_as_ext2(); 514324b58424STheodore Ts'o unregister_as_ext3(); 514403010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5145ac27a0ecSDave Kleikamp destroy_inodecache(); 51465dabfc78STheodore Ts'o ext4_exit_xattr(); 51475dabfc78STheodore Ts'o ext4_exit_mballoc(); 51488f021222SLukas Czerner ext4_exit_feat_adverts(); 51499f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 51503197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 51515dabfc78STheodore Ts'o ext4_exit_system_zone(); 51525dabfc78STheodore Ts'o ext4_exit_pageio(); 5153ac27a0ecSDave Kleikamp } 5154ac27a0ecSDave Kleikamp 5155ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 515683982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5157ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 51585dabfc78STheodore Ts'o module_init(ext4_init_fs) 51595dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5160