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); 652adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 66e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 67617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 68617ba13bSMingming Cao struct ext4_super_block *es); 69617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 70617ba13bSMingming Cao struct ext4_super_block *es); 71617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 72617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 73ac27a0ecSDave Kleikamp char nbuf[16]); 74617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 75617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 76c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 77617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 78c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 79152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 80152a0836SAl Viro const char *dev_name, void *data); 812035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 822035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 83d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 84bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 85bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 868f1f7453SEric Sandeen static void ext4_clear_request_list(void); 87ac27a0ecSDave Kleikamp 882035e776STheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 892035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 902035e776STheodore Ts'o .owner = THIS_MODULE, 912035e776STheodore Ts'o .name = "ext2", 922035e776STheodore Ts'o .mount = ext4_mount, 932035e776STheodore Ts'o .kill_sb = kill_block_super, 942035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 952035e776STheodore Ts'o }; 962035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 972035e776STheodore Ts'o #else 982035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 992035e776STheodore Ts'o #endif 1002035e776STheodore Ts'o 1012035e776STheodore Ts'o 102ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 103ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 104ba69f9abSJan Kara .owner = THIS_MODULE, 105ba69f9abSJan Kara .name = "ext3", 106152a0836SAl Viro .mount = ext4_mount, 107ba69f9abSJan Kara .kill_sb = kill_block_super, 108ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 109ba69f9abSJan Kara }; 110ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 111ba69f9abSJan Kara #else 112ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 113ba69f9abSJan Kara #endif 114bd81d8eeSLaurent Vivier 115*d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 116*d25425f8SDarrick J. Wong struct ext4_super_block *es) 117*d25425f8SDarrick J. Wong { 118*d25425f8SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 119*d25425f8SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 120*d25425f8SDarrick J. Wong return 1; 121*d25425f8SDarrick J. Wong 122*d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 123*d25425f8SDarrick J. Wong } 124*d25425f8SDarrick J. Wong 1259933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1269933fc0aSTheodore Ts'o { 1279933fc0aSTheodore Ts'o void *ret; 1289933fc0aSTheodore Ts'o 1299933fc0aSTheodore Ts'o ret = kmalloc(size, flags); 1309933fc0aSTheodore Ts'o if (!ret) 1319933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1329933fc0aSTheodore Ts'o return ret; 1339933fc0aSTheodore Ts'o } 1349933fc0aSTheodore Ts'o 1359933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1369933fc0aSTheodore Ts'o { 1379933fc0aSTheodore Ts'o void *ret; 1389933fc0aSTheodore Ts'o 139db9481c0SMathias Krause ret = kzalloc(size, flags); 1409933fc0aSTheodore Ts'o if (!ret) 1419933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1429933fc0aSTheodore Ts'o return ret; 1439933fc0aSTheodore Ts'o } 1449933fc0aSTheodore Ts'o 1459933fc0aSTheodore Ts'o void ext4_kvfree(void *ptr) 1469933fc0aSTheodore Ts'o { 1479933fc0aSTheodore Ts'o if (is_vmalloc_addr(ptr)) 1489933fc0aSTheodore Ts'o vfree(ptr); 1499933fc0aSTheodore Ts'o else 1509933fc0aSTheodore Ts'o kfree(ptr); 1519933fc0aSTheodore Ts'o 1529933fc0aSTheodore Ts'o } 1539933fc0aSTheodore Ts'o 1548fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1558fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 156bd81d8eeSLaurent Vivier { 1573a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1588fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1598fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 160bd81d8eeSLaurent Vivier } 161bd81d8eeSLaurent Vivier 1628fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1638fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 164bd81d8eeSLaurent Vivier { 1655272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 1668fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1678fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 168bd81d8eeSLaurent Vivier } 169bd81d8eeSLaurent Vivier 1708fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 1718fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 172bd81d8eeSLaurent Vivier { 1735272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 1748fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1758fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 176bd81d8eeSLaurent Vivier } 177bd81d8eeSLaurent Vivier 178021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 179560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 180560671a0SAneesh Kumar K.V { 181560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 182560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 183560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 184560671a0SAneesh Kumar K.V } 185560671a0SAneesh Kumar K.V 186560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 187560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 188560671a0SAneesh Kumar K.V { 189560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 190560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 191560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 192560671a0SAneesh Kumar K.V } 193560671a0SAneesh Kumar K.V 194560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 195560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 196560671a0SAneesh Kumar K.V { 197560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 198560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 199560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 200560671a0SAneesh Kumar K.V } 201560671a0SAneesh Kumar K.V 202560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 203560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 204560671a0SAneesh Kumar K.V { 205560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 206560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 207560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 208560671a0SAneesh Kumar K.V } 209560671a0SAneesh Kumar K.V 2108fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2118fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 212bd81d8eeSLaurent Vivier { 2133a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2148fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2158fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 216bd81d8eeSLaurent Vivier } 217bd81d8eeSLaurent Vivier 2188fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2198fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 220bd81d8eeSLaurent Vivier { 2215272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2228fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2238fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 224bd81d8eeSLaurent Vivier } 225bd81d8eeSLaurent Vivier 2268fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2278fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 228bd81d8eeSLaurent Vivier { 2295272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2308fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2318fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 232bd81d8eeSLaurent Vivier } 233bd81d8eeSLaurent Vivier 234021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 235560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 236560671a0SAneesh Kumar K.V { 237560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 238560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 239560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 240560671a0SAneesh Kumar K.V } 241560671a0SAneesh Kumar K.V 242560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 243560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 244560671a0SAneesh Kumar K.V { 245560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 246560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 247560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 248560671a0SAneesh Kumar K.V } 249560671a0SAneesh Kumar K.V 250560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 251560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 252560671a0SAneesh Kumar K.V { 253560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 254560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 255560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 256560671a0SAneesh Kumar K.V } 257560671a0SAneesh Kumar K.V 258560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 259560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 260560671a0SAneesh Kumar K.V { 261560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 262560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 263560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 264560671a0SAneesh Kumar K.V } 265560671a0SAneesh Kumar K.V 266d3d1faf6SCurt Wohlgemuth 267d3d1faf6SCurt Wohlgemuth /* Just increment the non-pointer handle value */ 268d3d1faf6SCurt Wohlgemuth static handle_t *ext4_get_nojournal(void) 269d3d1faf6SCurt Wohlgemuth { 270d3d1faf6SCurt Wohlgemuth handle_t *handle = current->journal_info; 271d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 272d3d1faf6SCurt Wohlgemuth 273d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); 274d3d1faf6SCurt Wohlgemuth 275d3d1faf6SCurt Wohlgemuth ref_cnt++; 276d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 277d3d1faf6SCurt Wohlgemuth 278d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 279d3d1faf6SCurt Wohlgemuth return handle; 280d3d1faf6SCurt Wohlgemuth } 281d3d1faf6SCurt Wohlgemuth 282d3d1faf6SCurt Wohlgemuth 283d3d1faf6SCurt Wohlgemuth /* Decrement the non-pointer handle value */ 284d3d1faf6SCurt Wohlgemuth static void ext4_put_nojournal(handle_t *handle) 285d3d1faf6SCurt Wohlgemuth { 286d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 287d3d1faf6SCurt Wohlgemuth 288d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt == 0); 289d3d1faf6SCurt Wohlgemuth 290d3d1faf6SCurt Wohlgemuth ref_cnt--; 291d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 292d3d1faf6SCurt Wohlgemuth 293d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 294d3d1faf6SCurt Wohlgemuth } 295d3d1faf6SCurt Wohlgemuth 296ac27a0ecSDave Kleikamp /* 297dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 298ac27a0ecSDave Kleikamp * 299ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 300ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 301ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 302ac27a0ecSDave Kleikamp * appropriate. 303be4f27d3SYongqiang Yang * 304be4f27d3SYongqiang Yang * To avoid j_barrier hold in userspace when a user calls freeze(), 305be4f27d3SYongqiang Yang * ext4 prevents a new handle from being started by s_frozen, which 306be4f27d3SYongqiang Yang * is in an upper layer. 307ac27a0ecSDave Kleikamp */ 308617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 309ac27a0ecSDave Kleikamp { 310ac27a0ecSDave Kleikamp journal_t *journal; 311be4f27d3SYongqiang Yang handle_t *handle; 312ac27a0ecSDave Kleikamp 31312706394STheodore Ts'o trace_ext4_journal_start(sb, nblocks, _RET_IP_); 314ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 315ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 316ac27a0ecSDave Kleikamp 317617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 318be4f27d3SYongqiang Yang handle = ext4_journal_current_handle(); 319be4f27d3SYongqiang Yang 320be4f27d3SYongqiang Yang /* 321be4f27d3SYongqiang Yang * If a handle has been started, it should be allowed to 322be4f27d3SYongqiang Yang * finish, otherwise deadlock could happen between freeze 323be4f27d3SYongqiang Yang * and others(e.g. truncate) due to the restart of the 324be4f27d3SYongqiang Yang * journal handle if the filesystem is forzen and active 325be4f27d3SYongqiang Yang * handles are not stopped. 326be4f27d3SYongqiang Yang */ 327be4f27d3SYongqiang Yang if (!handle) 328be4f27d3SYongqiang Yang vfs_check_frozen(sb, SB_FREEZE_TRANS); 329be4f27d3SYongqiang Yang 330be4f27d3SYongqiang Yang if (!journal) 331be4f27d3SYongqiang Yang return ext4_get_nojournal(); 332be4f27d3SYongqiang Yang /* 333be4f27d3SYongqiang Yang * Special case here: if the journal has aborted behind our 334be4f27d3SYongqiang Yang * backs (eg. EIO in the commit thread), then we still need to 335be4f27d3SYongqiang Yang * take the FS itself readonly cleanly. 336be4f27d3SYongqiang Yang */ 337ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 338c67d859eSTheodore Ts'o ext4_abort(sb, "Detected aborted journal"); 339ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 340ac27a0ecSDave Kleikamp } 341dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 342ac27a0ecSDave Kleikamp } 343ac27a0ecSDave Kleikamp 344ac27a0ecSDave Kleikamp /* 345ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 346dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 347ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 348ac27a0ecSDave Kleikamp * appropriate. 349ac27a0ecSDave Kleikamp */ 350c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) 351ac27a0ecSDave Kleikamp { 352ac27a0ecSDave Kleikamp struct super_block *sb; 353ac27a0ecSDave Kleikamp int err; 354ac27a0ecSDave Kleikamp int rc; 355ac27a0ecSDave Kleikamp 3560390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 357d3d1faf6SCurt Wohlgemuth ext4_put_nojournal(handle); 3580390131bSFrank Mayhar return 0; 3590390131bSFrank Mayhar } 360ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 361ac27a0ecSDave Kleikamp err = handle->h_err; 362dab291afSMingming Cao rc = jbd2_journal_stop(handle); 363ac27a0ecSDave Kleikamp 364ac27a0ecSDave Kleikamp if (!err) 365ac27a0ecSDave Kleikamp err = rc; 366ac27a0ecSDave Kleikamp if (err) 367c398eda0STheodore Ts'o __ext4_std_error(sb, where, line, err); 368ac27a0ecSDave Kleikamp return err; 369ac27a0ecSDave Kleikamp } 370ac27a0ecSDave Kleikamp 37190c7201bSTheodore Ts'o void ext4_journal_abort_handle(const char *caller, unsigned int line, 37290c7201bSTheodore Ts'o const char *err_fn, struct buffer_head *bh, 37390c7201bSTheodore Ts'o handle_t *handle, int err) 374ac27a0ecSDave Kleikamp { 375ac27a0ecSDave Kleikamp char nbuf[16]; 376617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 377ac27a0ecSDave Kleikamp 3780390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 3790390131bSFrank Mayhar 380ac27a0ecSDave Kleikamp if (bh) 381ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 382ac27a0ecSDave Kleikamp 383ac27a0ecSDave Kleikamp if (!handle->h_err) 384ac27a0ecSDave Kleikamp handle->h_err = err; 385ac27a0ecSDave Kleikamp 386ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 387ac27a0ecSDave Kleikamp return; 388ac27a0ecSDave Kleikamp 38992b97816STheodore Ts'o printk(KERN_ERR "EXT4-fs: %s:%d: aborting transaction: %s in %s\n", 39090c7201bSTheodore Ts'o caller, line, errstr, err_fn); 391ac27a0ecSDave Kleikamp 392dab291afSMingming Cao jbd2_journal_abort_handle(handle); 393ac27a0ecSDave Kleikamp } 394ac27a0ecSDave Kleikamp 3951c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3961c13d5c0STheodore Ts'o unsigned int line) 3971c13d5c0STheodore Ts'o { 3981c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3991c13d5c0STheodore Ts'o 4001c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4011c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4021c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 4031c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 4041c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 4051c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 4061c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 4071c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 4081c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 4091c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 4101c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 4111c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 4121c13d5c0STheodore Ts'o } 41366e61a9eSTheodore Ts'o /* 41466e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 41566e61a9eSTheodore Ts'o * started already 41666e61a9eSTheodore Ts'o */ 41766e61a9eSTheodore Ts'o if (!es->s_error_count) 41866e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 4191c13d5c0STheodore Ts'o es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); 4201c13d5c0STheodore Ts'o } 4211c13d5c0STheodore Ts'o 4221c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 4231c13d5c0STheodore Ts'o unsigned int line) 4241c13d5c0STheodore Ts'o { 4251c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 4261c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 4271c13d5c0STheodore Ts'o } 4281c13d5c0STheodore Ts'o 4297c2e7087STheodore Ts'o /* 4307c2e7087STheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 4317c2e7087STheodore Ts'o * structures, including the bdi structure, without telling anyone 4327c2e7087STheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 4337c2e7087STheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 4347c2e7087STheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 4357c2e7087STheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 4367c2e7087STheodore Ts'o */ 4377c2e7087STheodore Ts'o static int block_device_ejected(struct super_block *sb) 4387c2e7087STheodore Ts'o { 4397c2e7087STheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 4407c2e7087STheodore Ts'o struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; 4417c2e7087STheodore Ts'o 4427c2e7087STheodore Ts'o return bdi->dev == NULL; 4437c2e7087STheodore Ts'o } 4447c2e7087STheodore Ts'o 44518aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 44618aadd47SBobi Jam { 44718aadd47SBobi Jam struct super_block *sb = journal->j_private; 44818aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 44918aadd47SBobi Jam int error = is_journal_aborted(journal); 45018aadd47SBobi Jam struct ext4_journal_cb_entry *jce, *tmp; 45118aadd47SBobi Jam 45218aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 45318aadd47SBobi Jam list_for_each_entry_safe(jce, tmp, &txn->t_private_list, jce_list) { 45418aadd47SBobi Jam list_del_init(&jce->jce_list); 45518aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 45618aadd47SBobi Jam jce->jce_func(sb, jce, error); 45718aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 45818aadd47SBobi Jam } 45918aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 46018aadd47SBobi Jam } 4611c13d5c0STheodore Ts'o 462ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 463ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 464ac27a0ecSDave Kleikamp * 465ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 466617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 467ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 468ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 469ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 470ac27a0ecSDave Kleikamp * write out the superblock safely. 471ac27a0ecSDave Kleikamp * 472dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 473d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 474ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 475ac27a0ecSDave Kleikamp */ 476ac27a0ecSDave Kleikamp 477617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 478ac27a0ecSDave Kleikamp { 479ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 480ac27a0ecSDave Kleikamp return; 481ac27a0ecSDave Kleikamp 482ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 483617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 484ac27a0ecSDave Kleikamp 4854ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 486ac27a0ecSDave Kleikamp if (journal) 487dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 488ac27a0ecSDave Kleikamp } 489ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 490b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 491ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 492ac27a0ecSDave Kleikamp } 493ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 494617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 495ac27a0ecSDave Kleikamp sb->s_id); 496ac27a0ecSDave Kleikamp } 497ac27a0ecSDave Kleikamp 49812062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 499c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 500ac27a0ecSDave Kleikamp { 5010ff2ea7dSJoe Perches struct va_format vaf; 502ac27a0ecSDave Kleikamp va_list args; 503ac27a0ecSDave Kleikamp 504ac27a0ecSDave Kleikamp va_start(args, fmt); 5050ff2ea7dSJoe Perches vaf.fmt = fmt; 5060ff2ea7dSJoe Perches vaf.va = &args; 5070ff2ea7dSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 5080ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 509ac27a0ecSDave Kleikamp va_end(args); 510ac27a0ecSDave Kleikamp 511617ba13bSMingming Cao ext4_handle_error(sb); 512ac27a0ecSDave Kleikamp } 513ac27a0ecSDave Kleikamp 514c398eda0STheodore Ts'o void ext4_error_inode(struct inode *inode, const char *function, 515c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 516273df556SFrank Mayhar const char *fmt, ...) 517273df556SFrank Mayhar { 518273df556SFrank Mayhar va_list args; 519f7c21177STheodore Ts'o struct va_format vaf; 5201c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 521273df556SFrank Mayhar 5221c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 5231c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 5241c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 525273df556SFrank Mayhar va_start(args, fmt); 526f7c21177STheodore Ts'o vaf.fmt = fmt; 527f7c21177STheodore Ts'o vaf.va = &args; 528c398eda0STheodore Ts'o if (block) 529d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 530d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 531d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 532d9ee81daSJoe Perches block, current->comm, &vaf); 533d9ee81daSJoe Perches else 534d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 535d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 536d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 537d9ee81daSJoe Perches current->comm, &vaf); 538273df556SFrank Mayhar va_end(args); 539273df556SFrank Mayhar 540273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 541273df556SFrank Mayhar } 542273df556SFrank Mayhar 543c398eda0STheodore Ts'o void ext4_error_file(struct file *file, const char *function, 544f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 545f7c21177STheodore Ts'o const char *fmt, ...) 546273df556SFrank Mayhar { 547273df556SFrank Mayhar va_list args; 548f7c21177STheodore Ts'o struct va_format vaf; 5491c13d5c0STheodore Ts'o struct ext4_super_block *es; 550273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 551273df556SFrank Mayhar char pathname[80], *path; 552273df556SFrank Mayhar 5531c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 5541c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 5551c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 556273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 557f9a62d09SDan Carpenter if (IS_ERR(path)) 558273df556SFrank Mayhar path = "(unknown)"; 559f7c21177STheodore Ts'o va_start(args, fmt); 560f7c21177STheodore Ts'o vaf.fmt = fmt; 561f7c21177STheodore Ts'o vaf.va = &args; 562d9ee81daSJoe Perches if (block) 563d9ee81daSJoe Perches printk(KERN_CRIT 564d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 565d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 566d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 567d9ee81daSJoe Perches block, current->comm, path, &vaf); 568d9ee81daSJoe Perches else 569d9ee81daSJoe Perches printk(KERN_CRIT 570d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 571d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 572d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 573d9ee81daSJoe Perches current->comm, path, &vaf); 574273df556SFrank Mayhar va_end(args); 575273df556SFrank Mayhar 576273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 577273df556SFrank Mayhar } 578273df556SFrank Mayhar 579617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 580ac27a0ecSDave Kleikamp char nbuf[16]) 581ac27a0ecSDave Kleikamp { 582ac27a0ecSDave Kleikamp char *errstr = NULL; 583ac27a0ecSDave Kleikamp 584ac27a0ecSDave Kleikamp switch (errno) { 585ac27a0ecSDave Kleikamp case -EIO: 586ac27a0ecSDave Kleikamp errstr = "IO failure"; 587ac27a0ecSDave Kleikamp break; 588ac27a0ecSDave Kleikamp case -ENOMEM: 589ac27a0ecSDave Kleikamp errstr = "Out of memory"; 590ac27a0ecSDave Kleikamp break; 591ac27a0ecSDave Kleikamp case -EROFS: 59278f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 59378f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 594ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 595ac27a0ecSDave Kleikamp else 596ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 597ac27a0ecSDave Kleikamp break; 598ac27a0ecSDave Kleikamp default: 599ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 600ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 601ac27a0ecSDave Kleikamp * NULL. */ 602ac27a0ecSDave Kleikamp if (nbuf) { 603ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 604ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 605ac27a0ecSDave Kleikamp errstr = nbuf; 606ac27a0ecSDave Kleikamp } 607ac27a0ecSDave Kleikamp break; 608ac27a0ecSDave Kleikamp } 609ac27a0ecSDave Kleikamp 610ac27a0ecSDave Kleikamp return errstr; 611ac27a0ecSDave Kleikamp } 612ac27a0ecSDave Kleikamp 613617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 614ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 615ac27a0ecSDave Kleikamp 616c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 617c398eda0STheodore Ts'o unsigned int line, int errno) 618ac27a0ecSDave Kleikamp { 619ac27a0ecSDave Kleikamp char nbuf[16]; 620ac27a0ecSDave Kleikamp const char *errstr; 621ac27a0ecSDave Kleikamp 622ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 623ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 624ac27a0ecSDave Kleikamp * an error. */ 625ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 626ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 627ac27a0ecSDave Kleikamp return; 628ac27a0ecSDave Kleikamp 629617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 630c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 631c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 6321c13d5c0STheodore Ts'o save_error_info(sb, function, line); 633ac27a0ecSDave Kleikamp 634617ba13bSMingming Cao ext4_handle_error(sb); 635ac27a0ecSDave Kleikamp } 636ac27a0ecSDave Kleikamp 637ac27a0ecSDave Kleikamp /* 638617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 639ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 640ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 641ac27a0ecSDave Kleikamp * 642ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 643ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 644ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 645ac27a0ecSDave Kleikamp */ 646ac27a0ecSDave Kleikamp 647c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 648c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 649ac27a0ecSDave Kleikamp { 650ac27a0ecSDave Kleikamp va_list args; 651ac27a0ecSDave Kleikamp 6521c13d5c0STheodore Ts'o save_error_info(sb, function, line); 653ac27a0ecSDave Kleikamp va_start(args, fmt); 654c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 655c398eda0STheodore Ts'o function, line); 656ac27a0ecSDave Kleikamp vprintk(fmt, args); 657ac27a0ecSDave Kleikamp printk("\n"); 658ac27a0ecSDave Kleikamp va_end(args); 659ac27a0ecSDave Kleikamp 6601c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 661b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 662ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 6634ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 664ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 665dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 6661c13d5c0STheodore Ts'o save_error_info(sb, function, line); 6671c13d5c0STheodore Ts'o } 6681c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 6691c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 670ac27a0ecSDave Kleikamp } 671ac27a0ecSDave Kleikamp 6720ff2ea7dSJoe Perches void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) 673b31e1552SEric Sandeen { 6740ff2ea7dSJoe Perches struct va_format vaf; 675b31e1552SEric Sandeen va_list args; 676b31e1552SEric Sandeen 677b31e1552SEric Sandeen va_start(args, fmt); 6780ff2ea7dSJoe Perches vaf.fmt = fmt; 6790ff2ea7dSJoe Perches vaf.va = &args; 6800ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 681b31e1552SEric Sandeen va_end(args); 682b31e1552SEric Sandeen } 683b31e1552SEric Sandeen 68412062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 685c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 686ac27a0ecSDave Kleikamp { 6870ff2ea7dSJoe Perches struct va_format vaf; 688ac27a0ecSDave Kleikamp va_list args; 689ac27a0ecSDave Kleikamp 690ac27a0ecSDave Kleikamp va_start(args, fmt); 6910ff2ea7dSJoe Perches vaf.fmt = fmt; 6920ff2ea7dSJoe Perches vaf.va = &args; 6930ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6940ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 695ac27a0ecSDave Kleikamp va_end(args); 696ac27a0ecSDave Kleikamp } 697ac27a0ecSDave Kleikamp 698e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 699e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 700e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 701e29136f8STheodore Ts'o const char *fmt, ...) 7025d1b1b3fSAneesh Kumar K.V __releases(bitlock) 7035d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 7045d1b1b3fSAneesh Kumar K.V { 7050ff2ea7dSJoe Perches struct va_format vaf; 7065d1b1b3fSAneesh Kumar K.V va_list args; 7075d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 7085d1b1b3fSAneesh Kumar K.V 7091c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 7101c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 7111c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 7120ff2ea7dSJoe Perches 7135d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 7140ff2ea7dSJoe Perches 7150ff2ea7dSJoe Perches vaf.fmt = fmt; 7160ff2ea7dSJoe Perches vaf.va = &args; 71721149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 718e29136f8STheodore Ts'o sb->s_id, function, line, grp); 719e29136f8STheodore Ts'o if (ino) 7200ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 721e29136f8STheodore Ts'o if (block) 7220ff2ea7dSJoe Perches printk(KERN_CONT "block %llu:", (unsigned long long) block); 7230ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 7245d1b1b3fSAneesh Kumar K.V va_end(args); 7255d1b1b3fSAneesh Kumar K.V 7265d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 727e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 7285d1b1b3fSAneesh Kumar K.V return; 7295d1b1b3fSAneesh Kumar K.V } 7301c13d5c0STheodore Ts'o 7315d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 7325d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 7335d1b1b3fSAneesh Kumar K.V /* 7345d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 7355d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 7365d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 7375d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 7385d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 73925985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 7405d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 7415d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 7425d1b1b3fSAneesh Kumar K.V * more appropriate error code. 7435d1b1b3fSAneesh Kumar K.V */ 7445d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 7455d1b1b3fSAneesh Kumar K.V return; 7465d1b1b3fSAneesh Kumar K.V } 7475d1b1b3fSAneesh Kumar K.V 748617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 749ac27a0ecSDave Kleikamp { 750617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 751ac27a0ecSDave Kleikamp 752617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 753ac27a0ecSDave Kleikamp return; 754ac27a0ecSDave Kleikamp 75512062dddSEric Sandeen ext4_warning(sb, 756ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 757ac27a0ecSDave Kleikamp "running e2fsck is recommended", 758617ba13bSMingming Cao EXT4_DYNAMIC_REV); 759ac27a0ecSDave Kleikamp 760617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 761617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 762617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 763ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 764ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 765ac27a0ecSDave Kleikamp 766ac27a0ecSDave Kleikamp /* 767ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 768ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 769ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 770ac27a0ecSDave Kleikamp */ 771ac27a0ecSDave Kleikamp } 772ac27a0ecSDave Kleikamp 773ac27a0ecSDave Kleikamp /* 774ac27a0ecSDave Kleikamp * Open the external journal device 775ac27a0ecSDave Kleikamp */ 776b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 777ac27a0ecSDave Kleikamp { 778ac27a0ecSDave Kleikamp struct block_device *bdev; 779ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 780ac27a0ecSDave Kleikamp 781d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 782ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 783ac27a0ecSDave Kleikamp goto fail; 784ac27a0ecSDave Kleikamp return bdev; 785ac27a0ecSDave Kleikamp 786ac27a0ecSDave Kleikamp fail: 787b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 788ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 789ac27a0ecSDave Kleikamp return NULL; 790ac27a0ecSDave Kleikamp } 791ac27a0ecSDave Kleikamp 792ac27a0ecSDave Kleikamp /* 793ac27a0ecSDave Kleikamp * Release the journal device 794ac27a0ecSDave Kleikamp */ 795617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 796ac27a0ecSDave Kleikamp { 797e525fd89STejun Heo return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 798ac27a0ecSDave Kleikamp } 799ac27a0ecSDave Kleikamp 800617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 801ac27a0ecSDave Kleikamp { 802ac27a0ecSDave Kleikamp struct block_device *bdev; 803ac27a0ecSDave Kleikamp int ret = -ENODEV; 804ac27a0ecSDave Kleikamp 805ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 806ac27a0ecSDave Kleikamp if (bdev) { 807617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 808ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 809ac27a0ecSDave Kleikamp } 810ac27a0ecSDave Kleikamp return ret; 811ac27a0ecSDave Kleikamp } 812ac27a0ecSDave Kleikamp 813ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 814ac27a0ecSDave Kleikamp { 815617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 816ac27a0ecSDave Kleikamp } 817ac27a0ecSDave Kleikamp 818617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 819ac27a0ecSDave Kleikamp { 820ac27a0ecSDave Kleikamp struct list_head *l; 821ac27a0ecSDave Kleikamp 822b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 823ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 824ac27a0ecSDave Kleikamp 825ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 826ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 827ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 828ac27a0ecSDave Kleikamp printk(KERN_ERR " " 829ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 830ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 831ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 832ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 833ac27a0ecSDave Kleikamp } 834ac27a0ecSDave Kleikamp } 835ac27a0ecSDave Kleikamp 836617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 837ac27a0ecSDave Kleikamp { 838617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 839617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 840ef2cabf7SHidehiro Kawai int i, err; 841ac27a0ecSDave Kleikamp 842857ac889SLukas Czerner ext4_unregister_li_request(sb); 843e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 844e0ccfd95SChristoph Hellwig 8454c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 8464c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 8474c0425ffSMingming Cao 848a9e220f8SAl Viro lock_super(sb); 8490390131bSFrank Mayhar if (sbi->s_journal) { 850ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 85147b4a50bSJan Kara sbi->s_journal = NULL; 852ef2cabf7SHidehiro Kawai if (err < 0) 853c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 8540390131bSFrank Mayhar } 855d4edac31SJosef Bacik 856a1c6c569SSergey Senozhatsky del_timer(&sbi->s_err_report); 857d4edac31SJosef Bacik ext4_release_system_zone(sb); 858d4edac31SJosef Bacik ext4_mb_release(sb); 859d4edac31SJosef Bacik ext4_ext_release(sb); 860d4edac31SJosef Bacik ext4_xattr_put_super(sb); 861d4edac31SJosef Bacik 862ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 863617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 864ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 865ac27a0ecSDave Kleikamp } 866a8e25a83SArtem Bityutskiy if (sb->s_dirt || !(sb->s_flags & MS_RDONLY)) 867a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 868a8e25a83SArtem Bityutskiy 869240799cdSTheodore Ts'o if (sbi->s_proc) { 87066acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 8719f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 872240799cdSTheodore Ts'o } 8733197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 874ac27a0ecSDave Kleikamp 875ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 876ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 877f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 8789933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 87957042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 880ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 881ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 88257042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 883ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 884ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 885ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 886ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 887ac27a0ecSDave Kleikamp #endif 888ac27a0ecSDave Kleikamp 889ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 890ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 891ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 892ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 893ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 894ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 895ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 896ac27a0ecSDave Kleikamp 897f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 898ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 899ac27a0ecSDave Kleikamp /* 900ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 901ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 902ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 903ac27a0ecSDave Kleikamp */ 904ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 905f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 906617ba13bSMingming Cao ext4_blkdev_remove(sbi); 907ac27a0ecSDave Kleikamp } 908c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 909c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 910ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 9113197ebdbSTheodore Ts'o /* 9123197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 9133197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 9143197ebdbSTheodore Ts'o */ 9153197ebdbSTheodore Ts'o unlock_super(sb); 9163197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 9173197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 918705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 919ac27a0ecSDave Kleikamp kfree(sbi); 920ac27a0ecSDave Kleikamp } 921ac27a0ecSDave Kleikamp 922e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 923ac27a0ecSDave Kleikamp 924ac27a0ecSDave Kleikamp /* 925ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 926ac27a0ecSDave Kleikamp */ 927617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 928ac27a0ecSDave Kleikamp { 929617ba13bSMingming Cao struct ext4_inode_info *ei; 930ac27a0ecSDave Kleikamp 931e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 932ac27a0ecSDave Kleikamp if (!ei) 933ac27a0ecSDave Kleikamp return NULL; 9340b8e58a1SAndreas Dilger 935ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 93691246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 937a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 938c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 939c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 940d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 941d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 942d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 9439d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 944d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 945a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 946a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 947a9e7f447SDmitry Monakhov #endif 9488aefcd55STheodore Ts'o ei->jinode = NULL; 949c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 950744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 9518d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 952b436b9beSJan Kara ei->i_sync_tid = 0; 953b436b9beSJan Kara ei->i_datasync_tid = 0; 954f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 955e9e3bcecSEric Sandeen atomic_set(&ei->i_aiodio_unwritten, 0); 9560b8e58a1SAndreas Dilger 957ac27a0ecSDave Kleikamp return &ei->vfs_inode; 958ac27a0ecSDave Kleikamp } 959ac27a0ecSDave Kleikamp 9607ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9617ff9c073STheodore Ts'o { 9627ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9637ff9c073STheodore Ts'o 9647ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9657ff9c073STheodore Ts'o return drop; 9667ff9c073STheodore Ts'o } 9677ff9c073STheodore Ts'o 968fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 969fa0d7e3dSNick Piggin { 970fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 971fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 972fa0d7e3dSNick Piggin } 973fa0d7e3dSNick Piggin 974617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 975ac27a0ecSDave Kleikamp { 9769f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 977b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 978b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 979b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9809f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9819f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9829f7dd93dSVasily Averin true); 9839f7dd93dSVasily Averin dump_stack(); 9849f7dd93dSVasily Averin } 985fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 986ac27a0ecSDave Kleikamp } 987ac27a0ecSDave Kleikamp 98851cc5068SAlexey Dobriyan static void init_once(void *foo) 989ac27a0ecSDave Kleikamp { 990617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 991ac27a0ecSDave Kleikamp 992ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 99303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 994ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 995ac27a0ecSDave Kleikamp #endif 9960e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 997ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 998ac27a0ecSDave Kleikamp } 999ac27a0ecSDave Kleikamp 1000ac27a0ecSDave Kleikamp static int init_inodecache(void) 1001ac27a0ecSDave Kleikamp { 1002617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 1003617ba13bSMingming Cao sizeof(struct ext4_inode_info), 1004ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 1005ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 100620c2df83SPaul Mundt init_once); 1007617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1008ac27a0ecSDave Kleikamp return -ENOMEM; 1009ac27a0ecSDave Kleikamp return 0; 1010ac27a0ecSDave Kleikamp } 1011ac27a0ecSDave Kleikamp 1012ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1013ac27a0ecSDave Kleikamp { 1014617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1015ac27a0ecSDave Kleikamp } 1016ac27a0ecSDave Kleikamp 10170930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1018ac27a0ecSDave Kleikamp { 10190930fcc1SAl Viro invalidate_inode_buffers(inode); 10200930fcc1SAl Viro end_writeback(inode); 10219f754758SChristoph Hellwig dquot_drop(inode); 1022c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 10238aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 10248aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 10258aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 10268aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 10278aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 10288aefcd55STheodore Ts'o } 1029ac27a0ecSDave Kleikamp } 1030ac27a0ecSDave Kleikamp 10311b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10321b961ac0SChristoph Hellwig u64 ino, u32 generation) 1033ac27a0ecSDave Kleikamp { 1034ac27a0ecSDave Kleikamp struct inode *inode; 1035ac27a0ecSDave Kleikamp 1036617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1037ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1038617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1039ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1040ac27a0ecSDave Kleikamp 1041ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1042ac27a0ecSDave Kleikamp * 1043617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1044ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1045ac27a0ecSDave Kleikamp * 1046ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1047ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1048ac27a0ecSDave Kleikamp */ 10491d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 10501d1fe1eeSDavid Howells if (IS_ERR(inode)) 10511d1fe1eeSDavid Howells return ERR_CAST(inode); 10521d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1053ac27a0ecSDave Kleikamp iput(inode); 1054ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1055ac27a0ecSDave Kleikamp } 10561b961ac0SChristoph Hellwig 10571b961ac0SChristoph Hellwig return inode; 1058ac27a0ecSDave Kleikamp } 10591b961ac0SChristoph Hellwig 10601b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10611b961ac0SChristoph Hellwig int fh_len, int fh_type) 10621b961ac0SChristoph Hellwig { 10631b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10641b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10651b961ac0SChristoph Hellwig } 10661b961ac0SChristoph Hellwig 10671b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10681b961ac0SChristoph Hellwig int fh_len, int fh_type) 10691b961ac0SChristoph Hellwig { 10701b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10711b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1072ac27a0ecSDave Kleikamp } 1073ac27a0ecSDave Kleikamp 1074c39a7f84SToshiyuki Okajima /* 1075c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1076c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1077c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1078c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1079c39a7f84SToshiyuki Okajima */ 10800b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10810b8e58a1SAndreas Dilger gfp_t wait) 1082c39a7f84SToshiyuki Okajima { 1083c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1084c39a7f84SToshiyuki Okajima 1085c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1086c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1087c39a7f84SToshiyuki Okajima return 0; 1088c39a7f84SToshiyuki Okajima if (journal) 1089c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1090c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1091c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1092c39a7f84SToshiyuki Okajima } 1093c39a7f84SToshiyuki Okajima 1094ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1095ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1096ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1097ac27a0ecSDave Kleikamp 1098617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1099617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1100617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1101617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1102617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 11036f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1104f00c9e44SJan Kara struct path *path); 1105ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1106617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1107617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1108ac27a0ecSDave Kleikamp size_t len, loff_t off); 1109617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1110ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1111ac27a0ecSDave Kleikamp 111261e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 111360e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1114617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1115617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1116617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1117617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1118a5b5ee32SJan Kara .write_info = ext4_write_info, 1119a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1120a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1121ac27a0ecSDave Kleikamp }; 1122ac27a0ecSDave Kleikamp 11230d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1124617ba13bSMingming Cao .quota_on = ext4_quota_on, 1125ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1126287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1127287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1128287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1129287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1130287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1131ac27a0ecSDave Kleikamp }; 1132ac27a0ecSDave Kleikamp #endif 1133ac27a0ecSDave Kleikamp 1134ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1135617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1136617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1137617ba13bSMingming Cao .write_inode = ext4_write_inode, 1138617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 11397ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11400930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1141617ba13bSMingming Cao .put_super = ext4_put_super, 1142617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1143c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1144c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1145617ba13bSMingming Cao .statfs = ext4_statfs, 1146617ba13bSMingming Cao .remount_fs = ext4_remount, 1147617ba13bSMingming Cao .show_options = ext4_show_options, 1148ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1149617ba13bSMingming Cao .quota_read = ext4_quota_read, 1150617ba13bSMingming Cao .quota_write = ext4_quota_write, 1151ac27a0ecSDave Kleikamp #endif 1152c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1153ac27a0ecSDave Kleikamp }; 1154ac27a0ecSDave Kleikamp 11559ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 11569ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 11579ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 11589ca92389STheodore Ts'o .write_inode = ext4_write_inode, 11599ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 11607ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11610930fcc1SAl Viro .evict_inode = ext4_evict_inode, 11629ca92389STheodore Ts'o .write_super = ext4_write_super, 11639ca92389STheodore Ts'o .put_super = ext4_put_super, 11649ca92389STheodore Ts'o .statfs = ext4_statfs, 11659ca92389STheodore Ts'o .remount_fs = ext4_remount, 11669ca92389STheodore Ts'o .show_options = ext4_show_options, 11679ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 11689ca92389STheodore Ts'o .quota_read = ext4_quota_read, 11699ca92389STheodore Ts'o .quota_write = ext4_quota_write, 11709ca92389STheodore Ts'o #endif 11719ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 11729ca92389STheodore Ts'o }; 11739ca92389STheodore Ts'o 117439655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11751b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11761b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1177617ba13bSMingming Cao .get_parent = ext4_get_parent, 1178ac27a0ecSDave Kleikamp }; 1179ac27a0ecSDave Kleikamp 1180ac27a0ecSDave Kleikamp enum { 1181ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1182ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 118372578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1184ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 118572578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 118630773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 118743e625d8SEric Sandeen Opt_journal_dev, Opt_journal_checksum, Opt_journal_async_commit, 1188ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1189296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1190ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11915a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1192ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1193661aa520SEric Sandeen Opt_usrquota, Opt_grpquota, Opt_i_version, 11941449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 11951449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 11965328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1197744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1198fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1199ac27a0ecSDave Kleikamp }; 1200ac27a0ecSDave Kleikamp 1201a447c093SSteven Whitehouse static const match_table_t tokens = { 1202ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1203ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1204ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1205ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1206ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1207ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1208ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1209ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1210ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1211ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1212ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1213ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1214ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1215ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 121672578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 121772578c33STheodore Ts'o {Opt_removed, "orlov"}, 1218ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1219ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1220ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1221ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1222e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 12235a916be1STheodore Ts'o {Opt_noload, "noload"}, 122472578c33STheodore Ts'o {Opt_removed, "nobh"}, 122572578c33STheodore Ts'o {Opt_removed, "bh"}, 1226ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 122730773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 122830773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1229ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1230818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1231818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1232ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1233ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1234ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1235ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12365bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12375bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1238ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1239ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1240ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1241ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1242ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1243ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12445a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1245ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1246ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1247ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1248ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1249ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 125006705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 125106705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 125225ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1253c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 125464769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1255dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 12561449032bSTheodore Ts'o {Opt_mblk_io_submit, "mblk_io_submit"}, 12571449032bSTheodore Ts'o {Opt_nomblk_io_submit, "nomblk_io_submit"}, 12586fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12596fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1260240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1261b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1262afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 126306705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 126406705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1265744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1266744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12675328e635SEric Sandeen {Opt_discard, "discard"}, 12685328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1269fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1270fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1271fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1272c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1273c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1274c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1275c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1276c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1277f3f12faaSJosef Bacik {Opt_err, NULL}, 1278ac27a0ecSDave Kleikamp }; 1279ac27a0ecSDave Kleikamp 1280617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1281ac27a0ecSDave Kleikamp { 1282617ba13bSMingming Cao ext4_fsblk_t sb_block; 1283ac27a0ecSDave Kleikamp char *options = (char *) *data; 1284ac27a0ecSDave Kleikamp 1285ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1286ac27a0ecSDave Kleikamp return 1; /* Default location */ 12870b8e58a1SAndreas Dilger 1288ac27a0ecSDave Kleikamp options += 3; 12890b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1290ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1291ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12924776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1293ac27a0ecSDave Kleikamp (char *) *data); 1294ac27a0ecSDave Kleikamp return 1; 1295ac27a0ecSDave Kleikamp } 1296ac27a0ecSDave Kleikamp if (*options == ',') 1297ac27a0ecSDave Kleikamp options++; 1298ac27a0ecSDave Kleikamp *data = (void *) options; 12990b8e58a1SAndreas Dilger 1300ac27a0ecSDave Kleikamp return sb_block; 1301ac27a0ecSDave Kleikamp } 1302ac27a0ecSDave Kleikamp 1303b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1304437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1305437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1306b3881f74STheodore Ts'o 130756c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 130856c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 130956c50f11SDmitry Monakhov { 131056c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 131156c50f11SDmitry Monakhov char *qname; 131256c50f11SDmitry Monakhov 131356c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 131456c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 131556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 131656c50f11SDmitry Monakhov "Cannot change journaled " 131756c50f11SDmitry Monakhov "quota options when quota turned on"); 131857f73c2cSTheodore Ts'o return -1; 131956c50f11SDmitry Monakhov } 132056c50f11SDmitry Monakhov qname = match_strdup(args); 132156c50f11SDmitry Monakhov if (!qname) { 132256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 132356c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 132457f73c2cSTheodore Ts'o return -1; 132556c50f11SDmitry Monakhov } 132656c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 132756c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 132856c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 132956c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 133056c50f11SDmitry Monakhov kfree(qname); 133157f73c2cSTheodore Ts'o return -1; 133256c50f11SDmitry Monakhov } 133356c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 133456c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 133556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 133656c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 133756c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 133856c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 133957f73c2cSTheodore Ts'o return -1; 134056c50f11SDmitry Monakhov } 1341fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 134256c50f11SDmitry Monakhov return 1; 134356c50f11SDmitry Monakhov } 134456c50f11SDmitry Monakhov 134556c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 134656c50f11SDmitry Monakhov { 134756c50f11SDmitry Monakhov 134856c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 134956c50f11SDmitry Monakhov 135056c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 135156c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 135256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 135356c50f11SDmitry Monakhov " when quota turned on"); 135457f73c2cSTheodore Ts'o return -1; 135556c50f11SDmitry Monakhov } 135656c50f11SDmitry Monakhov /* 135756c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 135856c50f11SDmitry Monakhov * to be correct 135956c50f11SDmitry Monakhov */ 136056c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 136156c50f11SDmitry Monakhov return 1; 136256c50f11SDmitry Monakhov } 136356c50f11SDmitry Monakhov #endif 136456c50f11SDmitry Monakhov 136526092bf5STheodore Ts'o #define MOPT_SET 0x0001 136626092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 136726092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 136826092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 136926092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 137026092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 137126092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 137226092bf5STheodore Ts'o #define MOPT_Q 0 137326092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 137426092bf5STheodore Ts'o #else 137526092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 137626092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 137726092bf5STheodore Ts'o #endif 137826092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 137926092bf5STheodore Ts'o 138026092bf5STheodore Ts'o static const struct mount_opts { 138126092bf5STheodore Ts'o int token; 138226092bf5STheodore Ts'o int mount_opt; 138326092bf5STheodore Ts'o int flags; 138426092bf5STheodore Ts'o } ext4_mount_opts[] = { 138526092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 138626092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 138726092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 138826092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 138926092bf5STheodore Ts'o {Opt_mblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_SET}, 139026092bf5STheodore Ts'o {Opt_nomblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_CLEAR}, 139126092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 139226092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 139326092bf5STheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_SET}, 139426092bf5STheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_CLEAR}, 139526092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 139626092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 139726092bf5STheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, MOPT_SET | MOPT_EXPLICIT}, 139826092bf5STheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, MOPT_CLEAR | MOPT_EXPLICIT}, 139926092bf5STheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, MOPT_SET}, 140026092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 140126092bf5STheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), MOPT_SET}, 140226092bf5STheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_SET}, 140326092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 140426092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 140526092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 140626092bf5STheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_SET}, 140726092bf5STheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_CLEAR}, 140826092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 140926092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 141026092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 141126092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 141226092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 141326092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 141426092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 141526092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 141626092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 141726092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 141826092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 141926092bf5STheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_DATAJ}, 142026092bf5STheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_DATAJ}, 142126092bf5STheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, MOPT_DATAJ}, 142226092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 142326092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 142426092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 142526092bf5STheodore Ts'o #else 142626092bf5STheodore Ts'o {Opt_user_xattr, 0, MOPT_NOSUPPORT}, 142726092bf5STheodore Ts'o {Opt_nouser_xattr, 0, MOPT_NOSUPPORT}, 142826092bf5STheodore Ts'o #endif 142926092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 143026092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 143126092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 143226092bf5STheodore Ts'o #else 143326092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 143426092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 143526092bf5STheodore Ts'o #endif 143626092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 143726092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 143826092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 143926092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 144026092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 144126092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 144226092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 144326092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 144426092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 144526092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 144626092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 144726092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 144826092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 144926092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 145026092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 145126092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 145226092bf5STheodore Ts'o {Opt_err, 0, 0} 145326092bf5STheodore Ts'o }; 145426092bf5STheodore Ts'o 145526092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 145626092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 145726092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 145826092bf5STheodore Ts'o { 145926092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 146026092bf5STheodore Ts'o const struct mount_opts *m; 146126092bf5STheodore Ts'o int arg = 0; 146226092bf5STheodore Ts'o 146357f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 146457f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 146557f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 146657f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 146757f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 146857f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 146957f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 147057f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 147157f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 147257f73c2cSTheodore Ts'o #endif 147326092bf5STheodore Ts'o if (args->from && match_int(args, &arg)) 147426092bf5STheodore Ts'o return -1; 147526092bf5STheodore Ts'o switch (token) { 1476f7048605STheodore Ts'o case Opt_noacl: 1477f7048605STheodore Ts'o case Opt_nouser_xattr: 1478f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1479f7048605STheodore Ts'o break; 148026092bf5STheodore Ts'o case Opt_sb: 148126092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 148226092bf5STheodore Ts'o case Opt_removed: 148326092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 148426092bf5STheodore Ts'o "Ignoring removed %s option", opt); 148526092bf5STheodore Ts'o return 1; 148626092bf5STheodore Ts'o case Opt_resuid: 148726092bf5STheodore Ts'o sbi->s_resuid = arg; 148826092bf5STheodore Ts'o return 1; 148926092bf5STheodore Ts'o case Opt_resgid: 149026092bf5STheodore Ts'o sbi->s_resgid = arg; 149126092bf5STheodore Ts'o return 1; 149226092bf5STheodore Ts'o case Opt_abort: 149326092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 149426092bf5STheodore Ts'o return 1; 149526092bf5STheodore Ts'o case Opt_i_version: 149626092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 149726092bf5STheodore Ts'o return 1; 149826092bf5STheodore Ts'o case Opt_journal_dev: 149926092bf5STheodore Ts'o if (is_remount) { 150026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 150126092bf5STheodore Ts'o "Cannot specify journal on remount"); 150226092bf5STheodore Ts'o return -1; 150326092bf5STheodore Ts'o } 150426092bf5STheodore Ts'o *journal_devnum = arg; 150526092bf5STheodore Ts'o return 1; 150626092bf5STheodore Ts'o case Opt_journal_ioprio: 150726092bf5STheodore Ts'o if (arg < 0 || arg > 7) 150826092bf5STheodore Ts'o return -1; 150926092bf5STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 151026092bf5STheodore Ts'o return 1; 151126092bf5STheodore Ts'o } 151226092bf5STheodore Ts'o 151326092bf5STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 151426092bf5STheodore Ts'o if (token != m->token) 151526092bf5STheodore Ts'o continue; 151626092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 151726092bf5STheodore Ts'o return -1; 151826092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 151926092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 152026092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 152126092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 152226092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 152326092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 152426092bf5STheodore Ts'o "options when quota turned on"); 152526092bf5STheodore Ts'o return -1; 152626092bf5STheodore Ts'o } 152726092bf5STheodore Ts'o 152826092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 152926092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 153026092bf5STheodore Ts'o } else if (token == Opt_commit) { 153126092bf5STheodore Ts'o if (arg == 0) 153226092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 153326092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 153426092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 153526092bf5STheodore Ts'o if (arg == 0) 153626092bf5STheodore Ts'o arg = EXT4_DEF_MAX_BATCH_TIME; 153726092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 153826092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 153926092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 154026092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 154126092bf5STheodore Ts'o if (arg > (1 << 30)) 154226092bf5STheodore Ts'o return -1; 154326092bf5STheodore Ts'o if (arg && !is_power_of_2(arg)) { 154426092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 154526092bf5STheodore Ts'o "EXT4-fs: inode_readahead_blks" 154626092bf5STheodore Ts'o " must be a power of 2"); 154726092bf5STheodore Ts'o return -1; 154826092bf5STheodore Ts'o } 154926092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 155026092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 155126092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 155226092bf5STheodore Ts'o if (!args->from) 155326092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 155426092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 155526092bf5STheodore Ts'o } else if (token == Opt_stripe) { 155626092bf5STheodore Ts'o sbi->s_stripe = arg; 155726092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 155826092bf5STheodore Ts'o if (is_remount) { 155926092bf5STheodore Ts'o if (!sbi->s_journal) 156026092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 156126092bf5STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) != 156226092bf5STheodore Ts'o m->mount_opt) { 156326092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 156426092bf5STheodore Ts'o "Cannot change data mode on remount"); 156526092bf5STheodore Ts'o return -1; 156626092bf5STheodore Ts'o } 156726092bf5STheodore Ts'o } else { 156826092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 156926092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 157026092bf5STheodore Ts'o } 157126092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 157226092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 157326092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 157426092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 157526092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot " 157626092bf5STheodore Ts'o "change journaled quota options " 157726092bf5STheodore Ts'o "when quota turned on"); 157826092bf5STheodore Ts'o return -1; 157926092bf5STheodore Ts'o } 158026092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 158126092bf5STheodore Ts'o #endif 158226092bf5STheodore Ts'o } else { 158326092bf5STheodore Ts'o if (!args->from) 158426092bf5STheodore Ts'o arg = 1; 158526092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 158626092bf5STheodore Ts'o arg = !arg; 158726092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 158826092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 158926092bf5STheodore Ts'o "buggy handling of option %s", opt); 159026092bf5STheodore Ts'o WARN_ON(1); 159126092bf5STheodore Ts'o return -1; 159226092bf5STheodore Ts'o } 159326092bf5STheodore Ts'o if (arg != 0) 159426092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 159526092bf5STheodore Ts'o else 159626092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 159726092bf5STheodore Ts'o } 159826092bf5STheodore Ts'o return 1; 159926092bf5STheodore Ts'o } 160026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 160126092bf5STheodore Ts'o "or missing value", opt); 160226092bf5STheodore Ts'o return -1; 160326092bf5STheodore Ts'o } 160426092bf5STheodore Ts'o 1605ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1606c3191067STheodore Ts'o unsigned long *journal_devnum, 1607b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1608661aa520SEric Sandeen int is_remount) 1609ac27a0ecSDave Kleikamp { 1610db7e5c66SEldad Zack #ifdef CONFIG_QUOTA 1611617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1612db7e5c66SEldad Zack #endif 1613ac27a0ecSDave Kleikamp char *p; 1614ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 161526092bf5STheodore Ts'o int token; 1616ac27a0ecSDave Kleikamp 1617ac27a0ecSDave Kleikamp if (!options) 1618ac27a0ecSDave Kleikamp return 1; 1619ac27a0ecSDave Kleikamp 1620ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1621ac27a0ecSDave Kleikamp if (!*p) 1622ac27a0ecSDave Kleikamp continue; 162315121c18SEric Sandeen /* 162415121c18SEric Sandeen * Initialize args struct so we know whether arg was 162515121c18SEric Sandeen * found; some options take optional arguments. 162615121c18SEric Sandeen */ 162726092bf5STheodore Ts'o args[0].to = args[0].from = 0; 1628ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 162926092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 163026092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1631ac27a0ecSDave Kleikamp return 0; 1632ac27a0ecSDave Kleikamp } 1633ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1634ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1635482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1636fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1637ac27a0ecSDave Kleikamp 1638482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1639fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1640ac27a0ecSDave Kleikamp 164156c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1642b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1643b31e1552SEric Sandeen "format mixing"); 1644ac27a0ecSDave Kleikamp return 0; 1645ac27a0ecSDave Kleikamp } 1646ac27a0ecSDave Kleikamp 1647ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1648b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1649b31e1552SEric Sandeen "not specified"); 1650ac27a0ecSDave Kleikamp return 0; 1651ac27a0ecSDave Kleikamp } 1652ac27a0ecSDave Kleikamp } else { 1653ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1654b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 16552c8be6b2SJan Kara "specified with no journaling " 1656b31e1552SEric Sandeen "enabled"); 1657ac27a0ecSDave Kleikamp return 0; 1658ac27a0ecSDave Kleikamp } 1659ac27a0ecSDave Kleikamp } 1660ac27a0ecSDave Kleikamp #endif 1661ac27a0ecSDave Kleikamp return 1; 1662ac27a0ecSDave Kleikamp } 1663ac27a0ecSDave Kleikamp 16642adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 16652adf6da8STheodore Ts'o struct super_block *sb) 16662adf6da8STheodore Ts'o { 16672adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 16682adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 16692adf6da8STheodore Ts'o 16702adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 16712adf6da8STheodore Ts'o char *fmtname = ""; 16722adf6da8STheodore Ts'o 16732adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 16742adf6da8STheodore Ts'o case QFMT_VFS_OLD: 16752adf6da8STheodore Ts'o fmtname = "vfsold"; 16762adf6da8STheodore Ts'o break; 16772adf6da8STheodore Ts'o case QFMT_VFS_V0: 16782adf6da8STheodore Ts'o fmtname = "vfsv0"; 16792adf6da8STheodore Ts'o break; 16802adf6da8STheodore Ts'o case QFMT_VFS_V1: 16812adf6da8STheodore Ts'o fmtname = "vfsv1"; 16822adf6da8STheodore Ts'o break; 16832adf6da8STheodore Ts'o } 16842adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 16852adf6da8STheodore Ts'o } 16862adf6da8STheodore Ts'o 16872adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 16882adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 16892adf6da8STheodore Ts'o 16902adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 16912adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 16922adf6da8STheodore Ts'o 16932adf6da8STheodore Ts'o if (test_opt(sb, USRQUOTA)) 16942adf6da8STheodore Ts'o seq_puts(seq, ",usrquota"); 16952adf6da8STheodore Ts'o 16962adf6da8STheodore Ts'o if (test_opt(sb, GRPQUOTA)) 16972adf6da8STheodore Ts'o seq_puts(seq, ",grpquota"); 16982adf6da8STheodore Ts'o #endif 16992adf6da8STheodore Ts'o } 17002adf6da8STheodore Ts'o 17015a916be1STheodore Ts'o static const char *token2str(int token) 17025a916be1STheodore Ts'o { 17035a916be1STheodore Ts'o static const struct match_token *t; 17045a916be1STheodore Ts'o 17055a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17065a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17075a916be1STheodore Ts'o break; 17085a916be1STheodore Ts'o return t->pattern; 17095a916be1STheodore Ts'o } 17105a916be1STheodore Ts'o 17112adf6da8STheodore Ts'o /* 17122adf6da8STheodore Ts'o * Show an option if 17132adf6da8STheodore Ts'o * - it's set to a non-default value OR 17142adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17152adf6da8STheodore Ts'o */ 171666acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 171766acdcf4STheodore Ts'o int nodefs) 17182adf6da8STheodore Ts'o { 17192adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17202adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 172166acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17225a916be1STheodore Ts'o const struct mount_opts *m; 172366acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17242adf6da8STheodore Ts'o 172566acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 172666acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17272adf6da8STheodore Ts'o 17282adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17295a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17305a916be1STheodore Ts'o 17315a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17325a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 17335a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 17345a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 17355a916be1STheodore Ts'o continue; 173666acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 17375a916be1STheodore Ts'o continue; /* skip if same as the default */ 17385a916be1STheodore Ts'o if ((want_set && 17395a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 17405a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 17415a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 17425a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 17435a916be1STheodore Ts'o } 17445a916be1STheodore Ts'o 174566acdcf4STheodore Ts'o if (nodefs || sbi->s_resuid != EXT4_DEF_RESUID || 17465a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 17475a916be1STheodore Ts'o SEQ_OPTS_PRINT("resuid=%u", sbi->s_resuid); 174866acdcf4STheodore Ts'o if (nodefs || sbi->s_resgid != EXT4_DEF_RESGID || 17495a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 17505a916be1STheodore Ts'o SEQ_OPTS_PRINT("resgid=%u", sbi->s_resgid); 175166acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 17525a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 17535a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 17542adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 17555a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 17562adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 17575a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 175866acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 17595a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 176066acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 17615a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 176266acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 17635a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 17642adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 17655a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 176666acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 17675a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 176866acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 17692adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 17705a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 17712adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 17725a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 17732adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 17745a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 17755a916be1STheodore Ts'o } 177666acdcf4STheodore Ts'o if (nodefs || 177766acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 17785a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 17792adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 17802adf6da8STheodore Ts'o 178166acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 178266acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 17835a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 17842adf6da8STheodore Ts'o 17852adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 17862adf6da8STheodore Ts'o return 0; 17872adf6da8STheodore Ts'o } 17882adf6da8STheodore Ts'o 178966acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 179066acdcf4STheodore Ts'o { 179166acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 179266acdcf4STheodore Ts'o } 179366acdcf4STheodore Ts'o 179466acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 179566acdcf4STheodore Ts'o { 179666acdcf4STheodore Ts'o struct super_block *sb = seq->private; 179766acdcf4STheodore Ts'o int rc; 179866acdcf4STheodore Ts'o 179966acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 180066acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 180166acdcf4STheodore Ts'o seq_puts(seq, "\n"); 180266acdcf4STheodore Ts'o return rc; 180366acdcf4STheodore Ts'o } 180466acdcf4STheodore Ts'o 180566acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 180666acdcf4STheodore Ts'o { 180766acdcf4STheodore Ts'o return single_open(file, options_seq_show, PDE(inode)->data); 180866acdcf4STheodore Ts'o } 180966acdcf4STheodore Ts'o 181066acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 181166acdcf4STheodore Ts'o .owner = THIS_MODULE, 181266acdcf4STheodore Ts'o .open = options_open_fs, 181366acdcf4STheodore Ts'o .read = seq_read, 181466acdcf4STheodore Ts'o .llseek = seq_lseek, 181566acdcf4STheodore Ts'o .release = single_release, 181666acdcf4STheodore Ts'o }; 181766acdcf4STheodore Ts'o 1818617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1819ac27a0ecSDave Kleikamp int read_only) 1820ac27a0ecSDave Kleikamp { 1821617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1822ac27a0ecSDave Kleikamp int res = 0; 1823ac27a0ecSDave Kleikamp 1824617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1825b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1826b31e1552SEric Sandeen "forcing read-only mode"); 1827ac27a0ecSDave Kleikamp res = MS_RDONLY; 1828ac27a0ecSDave Kleikamp } 1829ac27a0ecSDave Kleikamp if (read_only) 1830281b5995STheodore Ts'o goto done; 1831617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1832b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1833b31e1552SEric Sandeen "running e2fsck is recommended"); 1834617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1835b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1836b31e1552SEric Sandeen "warning: mounting fs with errors, " 1837b31e1552SEric Sandeen "running e2fsck is recommended"); 1838ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1839ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1840ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1841b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1842b31e1552SEric Sandeen "warning: maximal mount count reached, " 1843b31e1552SEric Sandeen "running e2fsck is recommended"); 1844ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1845ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1846ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1847b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1848b31e1552SEric Sandeen "warning: checktime reached, " 1849b31e1552SEric Sandeen "running e2fsck is recommended"); 18500390131bSFrank Mayhar if (!sbi->s_journal) 1851216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1852ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1853617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1854e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1855ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1856617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 18570390131bSFrank Mayhar if (sbi->s_journal) 1858617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1859ac27a0ecSDave Kleikamp 1860e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1861281b5995STheodore Ts'o done: 1862ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1863a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1864a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1865ac27a0ecSDave Kleikamp sb->s_blocksize, 1866ac27a0ecSDave Kleikamp sbi->s_groups_count, 1867617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1868617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1869a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1870ac27a0ecSDave Kleikamp 18717abc52c2SDan Magenheimer cleancache_init_fs(sb); 1872ac27a0ecSDave Kleikamp return res; 1873ac27a0ecSDave Kleikamp } 1874ac27a0ecSDave Kleikamp 1875772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1876772cb7c8SJose R. Santos { 1877772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1878772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1879772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1880772cb7c8SJose R. Santos ext4_group_t flex_group; 1881d50f2ab6SXi Wang unsigned int groups_per_flex = 0; 1882c5ca7c76STheodore Ts'o size_t size; 1883772cb7c8SJose R. Santos int i; 1884772cb7c8SJose R. Santos 1885503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1886d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1887772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1888772cb7c8SJose R. Santos return 1; 1889772cb7c8SJose R. Santos } 1890d50f2ab6SXi Wang groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1891772cb7c8SJose R. Santos 1892c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1893c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1894d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1895d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1896c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 18979933fc0aSTheodore Ts'o sbi->s_flex_groups = ext4_kvzalloc(size, GFP_KERNEL); 1898c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 18999933fc0aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %u flex groups", 190094de56abSJoe Perches flex_group_count); 1901772cb7c8SJose R. Santos goto failed; 1902772cb7c8SJose R. Santos } 1903772cb7c8SJose R. Santos 1904772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 190588b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1906772cb7c8SJose R. Santos 1907772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19087ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19097ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 1910021b65bbSTheodore Ts'o atomic_add(ext4_free_group_clusters(sb, gdp), 191124aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 19127ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19137ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1914772cb7c8SJose R. Santos } 1915772cb7c8SJose R. Santos 1916772cb7c8SJose R. Santos return 1; 1917772cb7c8SJose R. Santos failed: 1918772cb7c8SJose R. Santos return 0; 1919772cb7c8SJose R. Santos } 1920772cb7c8SJose R. Santos 1921717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1922717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1923717d50e4SAndreas Dilger { 1924717d50e4SAndreas Dilger __u16 crc = 0; 1925717d50e4SAndreas Dilger 1926717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1927717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1928717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1929717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1930717d50e4SAndreas Dilger 1931717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1932717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1933717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1934717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1935717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1936717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1937717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1938717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1939717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1940717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1941717d50e4SAndreas Dilger offset); 1942717d50e4SAndreas Dilger } 1943717d50e4SAndreas Dilger 1944717d50e4SAndreas Dilger return cpu_to_le16(crc); 1945717d50e4SAndreas Dilger } 1946717d50e4SAndreas Dilger 1947717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1948717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1949717d50e4SAndreas Dilger { 1950717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1951717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1952717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1953717d50e4SAndreas Dilger return 0; 1954717d50e4SAndreas Dilger 1955717d50e4SAndreas Dilger return 1; 1956717d50e4SAndreas Dilger } 1957717d50e4SAndreas Dilger 1958ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1959bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 1960bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 1961ac27a0ecSDave Kleikamp { 1962617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1963617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1964617ba13bSMingming Cao ext4_fsblk_t last_block; 1965bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1966bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1967bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1968ce421581SJose R. Santos int flexbg_flag = 0; 1969bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 1970ac27a0ecSDave Kleikamp 1971ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1972ce421581SJose R. Santos flexbg_flag = 1; 1973ce421581SJose R. Santos 1974617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 1975ac27a0ecSDave Kleikamp 1976197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1977197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1978197cd65aSAkinobu Mita 1979ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1980bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1981ac27a0ecSDave Kleikamp else 1982ac27a0ecSDave Kleikamp last_block = first_block + 1983617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1984ac27a0ecSDave Kleikamp 1985bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 1986bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 1987bfff6873SLukas Czerner grp = i; 1988bfff6873SLukas Czerner 19898fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 19902b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 1991b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1992a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 1993b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 1994ac27a0ecSDave Kleikamp return 0; 1995ac27a0ecSDave Kleikamp } 19968fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 19972b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 1998b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1999a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2000b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2001ac27a0ecSDave Kleikamp return 0; 2002ac27a0ecSDave Kleikamp } 20038fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2004bd81d8eeSLaurent Vivier if (inode_table < first_block || 20052b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2006b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2007a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2008b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2009ac27a0ecSDave Kleikamp return 0; 2010ac27a0ecSDave Kleikamp } 2011955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2012717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 2013b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2014b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2015fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2016fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 20177ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2018955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2019717d50e4SAndreas Dilger return 0; 2020717d50e4SAndreas Dilger } 20217ee1ec4cSLi Zefan } 2022955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2023ce421581SJose R. Santos if (!flexbg_flag) 2024617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2025ac27a0ecSDave Kleikamp } 2026bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2027bfff6873SLukas Czerner *first_not_zeroed = grp; 2028ac27a0ecSDave Kleikamp 20295dee5437STheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 20305dee5437STheodore Ts'o EXT4_C2B(sbi, ext4_count_free_clusters(sb))); 2031617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2032ac27a0ecSDave Kleikamp return 1; 2033ac27a0ecSDave Kleikamp } 2034ac27a0ecSDave Kleikamp 2035617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2036ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2037ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2038ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2039ac27a0ecSDave Kleikamp * 2040ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2041ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2042ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2043ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2044ac27a0ecSDave Kleikamp * 2045ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2046ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2047ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2048617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2049ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2050ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2051ac27a0ecSDave Kleikamp */ 2052617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2053617ba13bSMingming Cao struct ext4_super_block *es) 2054ac27a0ecSDave Kleikamp { 2055ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2056ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2057ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2058ac27a0ecSDave Kleikamp int i; 2059ac27a0ecSDave Kleikamp #endif 2060ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2061ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2062ac27a0ecSDave Kleikamp return; 2063ac27a0ecSDave Kleikamp } 2064ac27a0ecSDave Kleikamp 2065a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2066b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2067b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2068a8f48a95SEric Sandeen return; 2069a8f48a95SEric Sandeen } 2070a8f48a95SEric Sandeen 2071d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2072d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2073d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2074d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2075d39195c3SAmir Goldstein return; 2076d39195c3SAmir Goldstein } 2077d39195c3SAmir Goldstein 2078617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2079ac27a0ecSDave Kleikamp if (es->s_last_orphan) 2080ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2081ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2082ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2083ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2084ac27a0ecSDave Kleikamp return; 2085ac27a0ecSDave Kleikamp } 2086ac27a0ecSDave Kleikamp 2087ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2088b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2089ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2090ac27a0ecSDave Kleikamp } 2091ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2092ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2093ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2094ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2095ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2096617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2097617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2098ac27a0ecSDave Kleikamp if (ret < 0) 2099b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2100b31e1552SEric Sandeen "Cannot turn on journaled " 2101b31e1552SEric Sandeen "quota: error %d", ret); 2102ac27a0ecSDave Kleikamp } 2103ac27a0ecSDave Kleikamp } 2104ac27a0ecSDave Kleikamp #endif 2105ac27a0ecSDave Kleikamp 2106ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2107ac27a0ecSDave Kleikamp struct inode *inode; 2108ac27a0ecSDave Kleikamp 210997bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 211097bd42b9SJosef Bacik if (IS_ERR(inode)) { 2111ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2112ac27a0ecSDave Kleikamp break; 2113ac27a0ecSDave Kleikamp } 2114ac27a0ecSDave Kleikamp 2115617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2116871a2931SChristoph Hellwig dquot_initialize(inode); 2117ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2118b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2119b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 212046e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2121e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2122ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2123617ba13bSMingming Cao ext4_truncate(inode); 2124ac27a0ecSDave Kleikamp nr_truncates++; 2125ac27a0ecSDave Kleikamp } else { 2126b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2127b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 212846e665e9SHarvey Harrison __func__, inode->i_ino); 2129ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2130ac27a0ecSDave Kleikamp inode->i_ino); 2131ac27a0ecSDave Kleikamp nr_orphans++; 2132ac27a0ecSDave Kleikamp } 2133ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2134ac27a0ecSDave Kleikamp } 2135ac27a0ecSDave Kleikamp 2136ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2137ac27a0ecSDave Kleikamp 2138ac27a0ecSDave Kleikamp if (nr_orphans) 2139b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2140b31e1552SEric Sandeen PLURAL(nr_orphans)); 2141ac27a0ecSDave Kleikamp if (nr_truncates) 2142b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2143b31e1552SEric Sandeen PLURAL(nr_truncates)); 2144ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2145ac27a0ecSDave Kleikamp /* Turn quotas off */ 2146ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2147ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2148287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2149ac27a0ecSDave Kleikamp } 2150ac27a0ecSDave Kleikamp #endif 2151ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2152ac27a0ecSDave Kleikamp } 21530b8e58a1SAndreas Dilger 2154cd2291a4SEric Sandeen /* 2155cd2291a4SEric Sandeen * Maximal extent format file size. 2156cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2157cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2158cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2159cd2291a4SEric Sandeen * so that won't be a limiting factor. 2160cd2291a4SEric Sandeen * 2161f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2162f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2163f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2164f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2165f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2166f17722f9SLukas Czerner * 2167cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2168cd2291a4SEric Sandeen */ 2169f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2170cd2291a4SEric Sandeen { 2171cd2291a4SEric Sandeen loff_t res; 2172cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2173cd2291a4SEric Sandeen 2174cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2175f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2176cd2291a4SEric Sandeen /* 217790c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2178cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2179cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2180cd2291a4SEric Sandeen */ 2181cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2182cd2291a4SEric Sandeen 2183cd2291a4SEric Sandeen /* total blocks in file system block size */ 2184cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2185cd2291a4SEric Sandeen upper_limit <<= blkbits; 2186cd2291a4SEric Sandeen } 2187cd2291a4SEric Sandeen 2188f17722f9SLukas Czerner /* 2189f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2190f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2191f17722f9SLukas Czerner * size 2192f17722f9SLukas Czerner */ 2193f17722f9SLukas Czerner res = (1LL << 32) - 1; 2194cd2291a4SEric Sandeen res <<= blkbits; 2195cd2291a4SEric Sandeen 2196cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2197cd2291a4SEric Sandeen if (res > upper_limit) 2198cd2291a4SEric Sandeen res = upper_limit; 2199cd2291a4SEric Sandeen 2200cd2291a4SEric Sandeen return res; 2201cd2291a4SEric Sandeen } 2202ac27a0ecSDave Kleikamp 2203ac27a0ecSDave Kleikamp /* 2204cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22050fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 22060fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2207ac27a0ecSDave Kleikamp */ 2208f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2209ac27a0ecSDave Kleikamp { 2210617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 22110fc1b451SAneesh Kumar K.V int meta_blocks; 22120fc1b451SAneesh Kumar K.V loff_t upper_limit; 22130b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 22140b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 22150b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 22160b8e58a1SAndreas Dilger * 22170b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 22180b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 22190fc1b451SAneesh Kumar K.V */ 22200fc1b451SAneesh Kumar K.V 2221f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 22220fc1b451SAneesh Kumar K.V /* 222390c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 22240b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 22250b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 22260fc1b451SAneesh Kumar K.V */ 22270fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 22280fc1b451SAneesh Kumar K.V 22290fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 22300fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 22310fc1b451SAneesh Kumar K.V 22320fc1b451SAneesh Kumar K.V } else { 22338180a562SAneesh Kumar K.V /* 22348180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 22358180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 22368180a562SAneesh Kumar K.V * represent total number of blocks in 22378180a562SAneesh Kumar K.V * file system block size 22388180a562SAneesh Kumar K.V */ 22390fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 22400fc1b451SAneesh Kumar K.V 22410fc1b451SAneesh Kumar K.V } 22420fc1b451SAneesh Kumar K.V 22430fc1b451SAneesh Kumar K.V /* indirect blocks */ 22440fc1b451SAneesh Kumar K.V meta_blocks = 1; 22450fc1b451SAneesh Kumar K.V /* double indirect blocks */ 22460fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 22470fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 22480fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 22490fc1b451SAneesh Kumar K.V 22500fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 22510fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2252ac27a0ecSDave Kleikamp 2253ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2254ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2255ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2256ac27a0ecSDave Kleikamp res <<= bits; 2257ac27a0ecSDave Kleikamp if (res > upper_limit) 2258ac27a0ecSDave Kleikamp res = upper_limit; 22590fc1b451SAneesh Kumar K.V 22600fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 22610fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 22620fc1b451SAneesh Kumar K.V 2263ac27a0ecSDave Kleikamp return res; 2264ac27a0ecSDave Kleikamp } 2265ac27a0ecSDave Kleikamp 2266617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 226770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2268ac27a0ecSDave Kleikamp { 2269617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2270fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2271ac27a0ecSDave Kleikamp int has_super = 0; 2272ac27a0ecSDave Kleikamp 2273ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2274ac27a0ecSDave Kleikamp 2275617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2276ac27a0ecSDave Kleikamp nr < first_meta_bg) 227770bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2278ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2279617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2280ac27a0ecSDave Kleikamp has_super = 1; 22810b8e58a1SAndreas Dilger 2282617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2283ac27a0ecSDave Kleikamp } 2284ac27a0ecSDave Kleikamp 2285c9de560dSAlex Tomas /** 2286c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2287c9de560dSAlex Tomas * @sbi: In memory super block info 2288c9de560dSAlex Tomas * 2289c9de560dSAlex Tomas * If we have specified it via mount option, then 2290c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2291c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2292c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2293c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2294c9de560dSAlex Tomas * 2295c9de560dSAlex Tomas */ 2296c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2297c9de560dSAlex Tomas { 2298c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2299c9de560dSAlex Tomas unsigned long stripe_width = 2300c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 23013eb08658SDan Ehrenberg int ret; 2302c9de560dSAlex Tomas 2303c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 23043eb08658SDan Ehrenberg ret = sbi->s_stripe; 23053eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 23063eb08658SDan Ehrenberg ret = stripe_width; 23073eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 23083eb08658SDan Ehrenberg ret = stride; 23093eb08658SDan Ehrenberg else 23103eb08658SDan Ehrenberg ret = 0; 2311c9de560dSAlex Tomas 23123eb08658SDan Ehrenberg /* 23133eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 23143eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 23153eb08658SDan Ehrenberg */ 23163eb08658SDan Ehrenberg if (ret <= 1) 23173eb08658SDan Ehrenberg ret = 0; 2318c9de560dSAlex Tomas 23193eb08658SDan Ehrenberg return ret; 2320c9de560dSAlex Tomas } 2321ac27a0ecSDave Kleikamp 23223197ebdbSTheodore Ts'o /* sysfs supprt */ 23233197ebdbSTheodore Ts'o 23243197ebdbSTheodore Ts'o struct ext4_attr { 23253197ebdbSTheodore Ts'o struct attribute attr; 23263197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 23273197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 23283197ebdbSTheodore Ts'o const char *, size_t); 23293197ebdbSTheodore Ts'o int offset; 23303197ebdbSTheodore Ts'o }; 23313197ebdbSTheodore Ts'o 23323197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 23333197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 23343197ebdbSTheodore Ts'o { 23353197ebdbSTheodore Ts'o char *endp; 23363197ebdbSTheodore Ts'o 2337e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2338e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 23393197ebdbSTheodore Ts'o if (*endp || *value > max) 23403197ebdbSTheodore Ts'o return -EINVAL; 23413197ebdbSTheodore Ts'o 23423197ebdbSTheodore Ts'o return 0; 23433197ebdbSTheodore Ts'o } 23443197ebdbSTheodore Ts'o 23453197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 23463197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 23473197ebdbSTheodore Ts'o char *buf) 23483197ebdbSTheodore Ts'o { 23493197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 23507b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 23517b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 23523197ebdbSTheodore Ts'o } 23533197ebdbSTheodore Ts'o 23543197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 23553197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 23563197ebdbSTheodore Ts'o { 23573197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 23583197ebdbSTheodore Ts'o 2359f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2360f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 23613197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 23623197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 23633197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 23643197ebdbSTheodore Ts'o } 23653197ebdbSTheodore Ts'o 23663197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 23673197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 23683197ebdbSTheodore Ts'o { 23693197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 23703197ebdbSTheodore Ts'o 2371f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2372f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 23733197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2374a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 23753197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2376a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 23773197ebdbSTheodore Ts'o } 23783197ebdbSTheodore Ts'o 23793197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 23803197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 23813197ebdbSTheodore Ts'o const char *buf, size_t count) 23823197ebdbSTheodore Ts'o { 23833197ebdbSTheodore Ts'o unsigned long t; 23843197ebdbSTheodore Ts'o 23853197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 23863197ebdbSTheodore Ts'o return -EINVAL; 23873197ebdbSTheodore Ts'o 23885dbd571dSAlexander V. Lukyanov if (t && !is_power_of_2(t)) 23893197ebdbSTheodore Ts'o return -EINVAL; 23903197ebdbSTheodore Ts'o 23913197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 23923197ebdbSTheodore Ts'o return count; 23933197ebdbSTheodore Ts'o } 23943197ebdbSTheodore Ts'o 23953197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 23963197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 23973197ebdbSTheodore Ts'o { 23983197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 23993197ebdbSTheodore Ts'o 24003197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 24013197ebdbSTheodore Ts'o } 24023197ebdbSTheodore Ts'o 24033197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 24043197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24053197ebdbSTheodore Ts'o const char *buf, size_t count) 24063197ebdbSTheodore Ts'o { 24073197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24083197ebdbSTheodore Ts'o unsigned long t; 24093197ebdbSTheodore Ts'o 24103197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 24113197ebdbSTheodore Ts'o return -EINVAL; 24123197ebdbSTheodore Ts'o *ui = t; 24133197ebdbSTheodore Ts'o return count; 24143197ebdbSTheodore Ts'o } 24153197ebdbSTheodore Ts'o 24163197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 24173197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 24183197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 24193197ebdbSTheodore Ts'o .show = _show, \ 24203197ebdbSTheodore Ts'o .store = _store, \ 24213197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 24223197ebdbSTheodore Ts'o } 24233197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 24243197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 24253197ebdbSTheodore Ts'o 2426857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 24273197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 24283197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 24293197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 24303197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 24313197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 24323197ebdbSTheodore Ts'o 24333197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 24343197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 24353197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 24363197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 24373197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 243811013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 24393197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 24403197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 24413197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 24423197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 24433197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 24443197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 244555138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 24463197ebdbSTheodore Ts'o 24473197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 24483197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 24493197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 24503197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 24513197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 245211013911SAndreas Dilger ATTR_LIST(inode_goal), 24533197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 24543197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 24553197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 24563197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 24573197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 24583197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 245955138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 24603197ebdbSTheodore Ts'o NULL, 24613197ebdbSTheodore Ts'o }; 24623197ebdbSTheodore Ts'o 2463857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2464857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 246527ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 2466857ac889SLukas Czerner 2467857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2468857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 246927ee40dfSLukas Czerner ATTR_LIST(batched_discard), 2470857ac889SLukas Czerner NULL, 2471857ac889SLukas Czerner }; 2472857ac889SLukas Czerner 24733197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 24743197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 24753197ebdbSTheodore Ts'o { 24763197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 24773197ebdbSTheodore Ts'o s_kobj); 24783197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 24793197ebdbSTheodore Ts'o 24803197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 24813197ebdbSTheodore Ts'o } 24823197ebdbSTheodore Ts'o 24833197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 24843197ebdbSTheodore Ts'o struct attribute *attr, 24853197ebdbSTheodore Ts'o const char *buf, size_t len) 24863197ebdbSTheodore Ts'o { 24873197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 24883197ebdbSTheodore Ts'o s_kobj); 24893197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 24903197ebdbSTheodore Ts'o 24913197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 24923197ebdbSTheodore Ts'o } 24933197ebdbSTheodore Ts'o 24943197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 24953197ebdbSTheodore Ts'o { 24963197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 24973197ebdbSTheodore Ts'o s_kobj); 24983197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 24993197ebdbSTheodore Ts'o } 25003197ebdbSTheodore Ts'o 250152cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 25023197ebdbSTheodore Ts'o .show = ext4_attr_show, 25033197ebdbSTheodore Ts'o .store = ext4_attr_store, 25043197ebdbSTheodore Ts'o }; 25053197ebdbSTheodore Ts'o 25063197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 25073197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 25083197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 25093197ebdbSTheodore Ts'o .release = ext4_sb_release, 25103197ebdbSTheodore Ts'o }; 25113197ebdbSTheodore Ts'o 2512857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2513857ac889SLukas Czerner { 2514857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2515857ac889SLukas Czerner } 2516857ac889SLukas Czerner 2517857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2518857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2519857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2520857ac889SLukas Czerner .release = ext4_feat_release, 2521857ac889SLukas Czerner }; 2522857ac889SLukas Czerner 2523a13fb1a4SEric Sandeen /* 2524a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2525a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2526a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2527a13fb1a4SEric Sandeen * 0 if it cannot be. 2528a13fb1a4SEric Sandeen */ 2529a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2530a13fb1a4SEric Sandeen { 2531a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2532a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2533a13fb1a4SEric Sandeen "Couldn't mount because of " 2534a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2535a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2536a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2537a13fb1a4SEric Sandeen return 0; 2538a13fb1a4SEric Sandeen } 2539a13fb1a4SEric Sandeen 2540a13fb1a4SEric Sandeen if (readonly) 2541a13fb1a4SEric Sandeen return 1; 2542a13fb1a4SEric Sandeen 2543a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2544a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2545a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2546a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2547a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2548a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2549a13fb1a4SEric Sandeen return 0; 2550a13fb1a4SEric Sandeen } 2551a13fb1a4SEric Sandeen /* 2552a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2553a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2554a13fb1a4SEric Sandeen */ 2555a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2556a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2557a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2558a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2559a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2560a13fb1a4SEric Sandeen return 0; 2561a13fb1a4SEric Sandeen } 2562a13fb1a4SEric Sandeen } 2563bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2564bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2565bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2566bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2567bab08ab9STheodore Ts'o "extents feature\n"); 2568bab08ab9STheodore Ts'o return 0; 2569bab08ab9STheodore Ts'o } 2570a13fb1a4SEric Sandeen return 1; 2571a13fb1a4SEric Sandeen } 2572a13fb1a4SEric Sandeen 257366e61a9eSTheodore Ts'o /* 257466e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 257566e61a9eSTheodore Ts'o * on the file system 257666e61a9eSTheodore Ts'o */ 257766e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 257866e61a9eSTheodore Ts'o { 257966e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 258066e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 258166e61a9eSTheodore Ts'o struct ext4_super_block *es; 258266e61a9eSTheodore Ts'o 258366e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 258466e61a9eSTheodore Ts'o es = sbi->s_es; 258566e61a9eSTheodore Ts'o 258666e61a9eSTheodore Ts'o if (es->s_error_count) 258766e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 258866e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 258966e61a9eSTheodore Ts'o if (es->s_first_error_time) { 259066e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 259166e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 259266e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 259366e61a9eSTheodore Ts'o es->s_first_error_func, 259466e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 259566e61a9eSTheodore Ts'o if (es->s_first_error_ino) 259666e61a9eSTheodore Ts'o printk(": inode %u", 259766e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 259866e61a9eSTheodore Ts'o if (es->s_first_error_block) 259966e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 260066e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 260166e61a9eSTheodore Ts'o printk("\n"); 260266e61a9eSTheodore Ts'o } 260366e61a9eSTheodore Ts'o if (es->s_last_error_time) { 260466e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 260566e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 260666e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 260766e61a9eSTheodore Ts'o es->s_last_error_func, 260866e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 260966e61a9eSTheodore Ts'o if (es->s_last_error_ino) 261066e61a9eSTheodore Ts'o printk(": inode %u", 261166e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 261266e61a9eSTheodore Ts'o if (es->s_last_error_block) 261366e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 261466e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 261566e61a9eSTheodore Ts'o printk("\n"); 261666e61a9eSTheodore Ts'o } 261766e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 261866e61a9eSTheodore Ts'o } 261966e61a9eSTheodore Ts'o 2620bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2621bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2622bfff6873SLukas Czerner { 2623bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2624bfff6873SLukas Czerner ext4_group_t group, ngroups; 2625bfff6873SLukas Czerner struct super_block *sb; 2626bfff6873SLukas Czerner unsigned long timeout = 0; 2627bfff6873SLukas Czerner int ret = 0; 2628bfff6873SLukas Czerner 2629bfff6873SLukas Czerner sb = elr->lr_super; 2630bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2631bfff6873SLukas Czerner 2632bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2633bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2634bfff6873SLukas Czerner if (!gdp) { 2635bfff6873SLukas Czerner ret = 1; 2636bfff6873SLukas Czerner break; 2637bfff6873SLukas Czerner } 2638bfff6873SLukas Czerner 2639bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2640bfff6873SLukas Czerner break; 2641bfff6873SLukas Czerner } 2642bfff6873SLukas Czerner 2643bfff6873SLukas Czerner if (group == ngroups) 2644bfff6873SLukas Czerner ret = 1; 2645bfff6873SLukas Czerner 2646bfff6873SLukas Czerner if (!ret) { 2647bfff6873SLukas Czerner timeout = jiffies; 2648bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2649bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2650bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 265151ce6511SLukas Czerner timeout = (jiffies - timeout) * 265251ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2653bfff6873SLukas Czerner elr->lr_timeout = timeout; 2654bfff6873SLukas Czerner } 2655bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2656bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2657bfff6873SLukas Czerner } 2658bfff6873SLukas Czerner 2659bfff6873SLukas Czerner return ret; 2660bfff6873SLukas Czerner } 2661bfff6873SLukas Czerner 2662bfff6873SLukas Czerner /* 2663bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 26644ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2665bfff6873SLukas Czerner */ 2666bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2667bfff6873SLukas Czerner { 2668bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2669bfff6873SLukas Czerner 2670bfff6873SLukas Czerner if (!elr) 2671bfff6873SLukas Czerner return; 2672bfff6873SLukas Czerner 2673bfff6873SLukas Czerner sbi = elr->lr_sbi; 2674bfff6873SLukas Czerner 2675bfff6873SLukas Czerner list_del(&elr->lr_request); 2676bfff6873SLukas Czerner sbi->s_li_request = NULL; 2677bfff6873SLukas Czerner kfree(elr); 2678bfff6873SLukas Czerner } 2679bfff6873SLukas Czerner 2680bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2681bfff6873SLukas Czerner { 26821bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 26831bb933fbSLukas Czerner if (!ext4_li_info) { 26841bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2685bfff6873SLukas Czerner return; 26861bb933fbSLukas Czerner } 2687bfff6873SLukas Czerner 2688bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 26891bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2690bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 26911bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2692bfff6873SLukas Czerner } 2693bfff6873SLukas Czerner 26948f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 26958f1f7453SEric Sandeen 2696bfff6873SLukas Czerner /* 2697bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2698bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2699bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2700bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2701bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2702bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2703bfff6873SLukas Czerner * next waking time and put itself into sleep. 2704bfff6873SLukas Czerner */ 2705bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2706bfff6873SLukas Czerner { 2707bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2708bfff6873SLukas Czerner struct list_head *pos, *n; 2709bfff6873SLukas Czerner struct ext4_li_request *elr; 27104ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2711bfff6873SLukas Czerner 2712bfff6873SLukas Czerner BUG_ON(NULL == eli); 2713bfff6873SLukas Czerner 2714bfff6873SLukas Czerner cont_thread: 2715bfff6873SLukas Czerner while (true) { 2716bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2717bfff6873SLukas Czerner 2718bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2719bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2720bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2721bfff6873SLukas Czerner goto exit_thread; 2722bfff6873SLukas Czerner } 2723bfff6873SLukas Czerner 2724bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2725bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2726bfff6873SLukas Czerner lr_request); 2727bfff6873SLukas Czerner 2728b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2729b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2730b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2731bfff6873SLukas Czerner ext4_remove_li_request(elr); 2732bfff6873SLukas Czerner continue; 2733bfff6873SLukas Czerner } 2734b2c78cd0STheodore Ts'o } 2735bfff6873SLukas Czerner 2736bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2737bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2738bfff6873SLukas Czerner } 2739bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2740bfff6873SLukas Czerner 2741a0acae0eSTejun Heo try_to_freeze(); 2742bfff6873SLukas Czerner 27434ed5c033SLukas Czerner cur = jiffies; 27444ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2745f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2746bfff6873SLukas Czerner cond_resched(); 2747bfff6873SLukas Czerner continue; 2748bfff6873SLukas Czerner } 2749bfff6873SLukas Czerner 27504ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 27514ed5c033SLukas Czerner 27528f1f7453SEric Sandeen if (kthread_should_stop()) { 27538f1f7453SEric Sandeen ext4_clear_request_list(); 27548f1f7453SEric Sandeen goto exit_thread; 27558f1f7453SEric Sandeen } 2756bfff6873SLukas Czerner } 2757bfff6873SLukas Czerner 2758bfff6873SLukas Czerner exit_thread: 2759bfff6873SLukas Czerner /* 2760bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2761bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2762bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2763bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2764bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2765bfff6873SLukas Czerner * new one. 2766bfff6873SLukas Czerner */ 2767bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2768bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2769bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2770bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2771bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2772bfff6873SLukas Czerner goto cont_thread; 2773bfff6873SLukas Czerner } 2774bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2775bfff6873SLukas Czerner kfree(ext4_li_info); 2776bfff6873SLukas Czerner ext4_li_info = NULL; 2777bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2778bfff6873SLukas Czerner 2779bfff6873SLukas Czerner return 0; 2780bfff6873SLukas Czerner } 2781bfff6873SLukas Czerner 2782bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2783bfff6873SLukas Czerner { 2784bfff6873SLukas Czerner struct list_head *pos, *n; 2785bfff6873SLukas Czerner struct ext4_li_request *elr; 2786bfff6873SLukas Czerner 2787bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2788bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2789bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2790bfff6873SLukas Czerner lr_request); 2791bfff6873SLukas Czerner ext4_remove_li_request(elr); 2792bfff6873SLukas Czerner } 2793bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2794bfff6873SLukas Czerner } 2795bfff6873SLukas Czerner 2796bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2797bfff6873SLukas Czerner { 27988f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 27998f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 28008f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 28018f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2802bfff6873SLukas Czerner ext4_clear_request_list(); 2803bfff6873SLukas Czerner kfree(ext4_li_info); 2804bfff6873SLukas Czerner ext4_li_info = NULL; 280592b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 2806bfff6873SLukas Czerner "initialization thread\n", 2807bfff6873SLukas Czerner err); 2808bfff6873SLukas Czerner return err; 2809bfff6873SLukas Czerner } 2810bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2811bfff6873SLukas Czerner return 0; 2812bfff6873SLukas Czerner } 2813bfff6873SLukas Czerner 2814bfff6873SLukas Czerner /* 2815bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2816bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2817bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2818bfff6873SLukas Czerner * groups and return total number of groups. 2819bfff6873SLukas Czerner */ 2820bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2821bfff6873SLukas Czerner { 2822bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2823bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2824bfff6873SLukas Czerner 2825bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2826bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2827bfff6873SLukas Czerner if (!gdp) 2828bfff6873SLukas Czerner continue; 2829bfff6873SLukas Czerner 2830bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2831bfff6873SLukas Czerner break; 2832bfff6873SLukas Czerner } 2833bfff6873SLukas Czerner 2834bfff6873SLukas Czerner return group; 2835bfff6873SLukas Czerner } 2836bfff6873SLukas Czerner 2837bfff6873SLukas Czerner static int ext4_li_info_new(void) 2838bfff6873SLukas Czerner { 2839bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2840bfff6873SLukas Czerner 2841bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2842bfff6873SLukas Czerner if (!eli) 2843bfff6873SLukas Czerner return -ENOMEM; 2844bfff6873SLukas Czerner 2845bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2846bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2847bfff6873SLukas Czerner 2848bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2849bfff6873SLukas Czerner 2850bfff6873SLukas Czerner ext4_li_info = eli; 2851bfff6873SLukas Czerner 2852bfff6873SLukas Czerner return 0; 2853bfff6873SLukas Czerner } 2854bfff6873SLukas Czerner 2855bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2856bfff6873SLukas Czerner ext4_group_t start) 2857bfff6873SLukas Czerner { 2858bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2859bfff6873SLukas Czerner struct ext4_li_request *elr; 2860bfff6873SLukas Czerner unsigned long rnd; 2861bfff6873SLukas Czerner 2862bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2863bfff6873SLukas Czerner if (!elr) 2864bfff6873SLukas Czerner return NULL; 2865bfff6873SLukas Czerner 2866bfff6873SLukas Czerner elr->lr_super = sb; 2867bfff6873SLukas Czerner elr->lr_sbi = sbi; 2868bfff6873SLukas Czerner elr->lr_next_group = start; 2869bfff6873SLukas Czerner 2870bfff6873SLukas Czerner /* 2871bfff6873SLukas Czerner * Randomize first schedule time of the request to 2872bfff6873SLukas Czerner * spread the inode table initialization requests 2873bfff6873SLukas Czerner * better. 2874bfff6873SLukas Czerner */ 2875bfff6873SLukas Czerner get_random_bytes(&rnd, sizeof(rnd)); 2876bfff6873SLukas Czerner elr->lr_next_sched = jiffies + (unsigned long)rnd % 2877bfff6873SLukas Czerner (EXT4_DEF_LI_MAX_START_DELAY * HZ); 2878bfff6873SLukas Czerner 2879bfff6873SLukas Czerner return elr; 2880bfff6873SLukas Czerner } 2881bfff6873SLukas Czerner 2882bfff6873SLukas Czerner static int ext4_register_li_request(struct super_block *sb, 2883bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 2884bfff6873SLukas Czerner { 2885bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2886bfff6873SLukas Czerner struct ext4_li_request *elr; 2887bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 28886c5a6cb9SAndrew Morton int ret = 0; 2889bfff6873SLukas Czerner 289051ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 289151ce6511SLukas Czerner /* 289251ce6511SLukas Czerner * Reset timeout so it can be computed again, because 289351ce6511SLukas Czerner * s_li_wait_mult might have changed. 289451ce6511SLukas Czerner */ 289551ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 2896beed5ecbSNicolas Kaiser return 0; 289751ce6511SLukas Czerner } 2898bfff6873SLukas Czerner 2899bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 2900bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 290155ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 2902beed5ecbSNicolas Kaiser return 0; 2903bfff6873SLukas Czerner 2904bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 2905beed5ecbSNicolas Kaiser if (!elr) 2906beed5ecbSNicolas Kaiser return -ENOMEM; 2907bfff6873SLukas Czerner 2908bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2909bfff6873SLukas Czerner 2910bfff6873SLukas Czerner if (NULL == ext4_li_info) { 2911bfff6873SLukas Czerner ret = ext4_li_info_new(); 2912bfff6873SLukas Czerner if (ret) 2913bfff6873SLukas Czerner goto out; 2914bfff6873SLukas Czerner } 2915bfff6873SLukas Czerner 2916bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2917bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 2918bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2919bfff6873SLukas Czerner 2920bfff6873SLukas Czerner sbi->s_li_request = elr; 292146e4690bSTao Ma /* 292246e4690bSTao Ma * set elr to NULL here since it has been inserted to 292346e4690bSTao Ma * the request_list and the removal and free of it is 292446e4690bSTao Ma * handled by ext4_clear_request_list from now on. 292546e4690bSTao Ma */ 292646e4690bSTao Ma elr = NULL; 2927bfff6873SLukas Czerner 2928bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 2929bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 2930bfff6873SLukas Czerner if (ret) 2931bfff6873SLukas Czerner goto out; 2932bfff6873SLukas Czerner } 2933bfff6873SLukas Czerner out: 2934bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2935beed5ecbSNicolas Kaiser if (ret) 2936bfff6873SLukas Czerner kfree(elr); 2937bfff6873SLukas Czerner return ret; 2938bfff6873SLukas Czerner } 2939bfff6873SLukas Czerner 2940bfff6873SLukas Czerner /* 2941bfff6873SLukas Czerner * We do not need to lock anything since this is called on 2942bfff6873SLukas Czerner * module unload. 2943bfff6873SLukas Czerner */ 2944bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 2945bfff6873SLukas Czerner { 2946bfff6873SLukas Czerner /* 2947bfff6873SLukas Czerner * If thread exited earlier 2948bfff6873SLukas Czerner * there's nothing to be done. 2949bfff6873SLukas Czerner */ 29508f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 2951bfff6873SLukas Czerner return; 2952bfff6873SLukas Czerner 29538f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 2954bfff6873SLukas Czerner } 2955bfff6873SLukas Czerner 2956617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 2957ac27a0ecSDave Kleikamp { 2958d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 2959ac27a0ecSDave Kleikamp struct buffer_head *bh; 2960617ba13bSMingming Cao struct ext4_super_block *es = NULL; 2961617ba13bSMingming Cao struct ext4_sb_info *sbi; 2962617ba13bSMingming Cao ext4_fsblk_t block; 2963617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 296470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 2965ac27a0ecSDave Kleikamp unsigned long offset = 0; 2966ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 2967ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 2968ac27a0ecSDave Kleikamp struct inode *root; 29699f6200bbSTheodore Ts'o char *cp; 29700390131bSFrank Mayhar const char *descr; 2971dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 2972281b5995STheodore Ts'o int blocksize, clustersize; 29734ec11028STheodore Ts'o unsigned int db_count; 29744ec11028STheodore Ts'o unsigned int i; 2975281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 2976bd81d8eeSLaurent Vivier __u64 blocks_count; 2977833f4077SPeter Zijlstra int err; 2978b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 2979bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 2980ac27a0ecSDave Kleikamp 2981ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 2982ac27a0ecSDave Kleikamp if (!sbi) 2983dcc7dae3SCyrill Gorcunov goto out_free_orig; 2984705895b6SPekka Enberg 2985705895b6SPekka Enberg sbi->s_blockgroup_lock = 2986705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 2987705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 2988705895b6SPekka Enberg kfree(sbi); 2989dcc7dae3SCyrill Gorcunov goto out_free_orig; 2990705895b6SPekka Enberg } 2991ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 2992ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 2993617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 2994617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 2995240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 2996d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 2997f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 2998f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 2999f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3000ac27a0ecSDave Kleikamp 30019f6200bbSTheodore Ts'o /* Cleanup superblock name */ 30029f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 30039f6200bbSTheodore Ts'o *cp = '!'; 30049f6200bbSTheodore Ts'o 3005dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3006617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3007ac27a0ecSDave Kleikamp if (!blocksize) { 3008b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3009ac27a0ecSDave Kleikamp goto out_fail; 3010ac27a0ecSDave Kleikamp } 3011ac27a0ecSDave Kleikamp 3012ac27a0ecSDave Kleikamp /* 3013617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3014ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3015ac27a0ecSDave Kleikamp */ 3016617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 301770bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 301870bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3019ac27a0ecSDave Kleikamp } else { 302070bbb3e0SAndrew Morton logical_sb_block = sb_block; 3021ac27a0ecSDave Kleikamp } 3022ac27a0ecSDave Kleikamp 302370bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3024b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3025ac27a0ecSDave Kleikamp goto out_fail; 3026ac27a0ecSDave Kleikamp } 3027ac27a0ecSDave Kleikamp /* 3028ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3029617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3030ac27a0ecSDave Kleikamp */ 3031617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3032ac27a0ecSDave Kleikamp sbi->s_es = es; 3033ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3034617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3035617ba13bSMingming Cao goto cantfind_ext4; 3036afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3037ac27a0ecSDave Kleikamp 3038*d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3039*d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3040*d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3041*d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3042*d25425f8SDarrick J. Wong silent = 1; 3043*d25425f8SDarrick J. Wong goto cantfind_ext4; 3044*d25425f8SDarrick J. Wong } 3045*d25425f8SDarrick J. Wong 3046ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3047ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3048fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3049617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3050fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 305187f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3052fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3053617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3054fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3055ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 305603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 3057fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 30582e7842b8SHugh Dickins #endif 305903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3060fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 30612e7842b8SHugh Dickins #endif 30626fd7a467STheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 3063617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3064fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3065617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3066fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3067617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3068fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3069ac27a0ecSDave Kleikamp 3070617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3071fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3072bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3073fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3074bb4f397aSAneesh Kumar K.V else 3075fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 30768b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3077fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 30788b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3079fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3080ac27a0ecSDave Kleikamp 3081ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 3082ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 308330773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 308430773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 308530773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3086ac27a0ecSDave Kleikamp 30878b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3088fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3089ac27a0ecSDave Kleikamp 30901e2462f9SMingming Cao /* 3091dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3092dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3093dd919b98SAneesh Kumar K.V */ 30948b67f04aSTheodore Ts'o if (!IS_EXT3_SB(sb) && 30958b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3096fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3097dd919b98SAneesh Kumar K.V 309851ce6511SLukas Czerner /* 309951ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 310051ce6511SLukas Czerner * no mount option specified. 310151ce6511SLukas Czerner */ 310251ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 310351ce6511SLukas Czerner 31048b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3105661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 31068b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 31078b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 31088b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 31098b67f04aSTheodore Ts'o } 31105a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3111b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3112661aa520SEric Sandeen &journal_ioprio, 0)) 3113ac27a0ecSDave Kleikamp goto failed_mount; 3114ac27a0ecSDave Kleikamp 311556889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 311656889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 311756889787STheodore Ts'o "with data=journal disables delayed " 311856889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 311956889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 312056889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 312156889787STheodore Ts'o "both data=journal and delalloc"); 312256889787STheodore Ts'o goto failed_mount; 312356889787STheodore Ts'o } 312456889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 312556889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 312656889787STheodore Ts'o "both data=journal and delalloc"); 312756889787STheodore Ts'o goto failed_mount; 312856889787STheodore Ts'o } 312956889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 313056889787STheodore Ts'o clear_opt(sb, DELALLOC); 313156889787STheodore Ts'o } 313256889787STheodore Ts'o 313356889787STheodore Ts'o blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 313456889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 313556889787STheodore Ts'o if (blocksize < PAGE_SIZE) { 313656889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 313756889787STheodore Ts'o "dioread_nolock if block size != PAGE_SIZE"); 313856889787STheodore Ts'o goto failed_mount; 313956889787STheodore Ts'o } 314056889787STheodore Ts'o } 314156889787STheodore Ts'o 3142ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3143482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3144ac27a0ecSDave Kleikamp 3145617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3146617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3147617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3148617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3149b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3150b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3151b31e1552SEric Sandeen "running e2fsck is recommended"); 3152469108ffSTheodore Tso 31532035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 31542035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 31552035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 31562035e776STheodore Ts'o "using the ext4 subsystem"); 31572035e776STheodore Ts'o else { 31582035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 31592035e776STheodore Ts'o "to feature incompatibilities"); 31602035e776STheodore Ts'o goto failed_mount; 31612035e776STheodore Ts'o } 31622035e776STheodore Ts'o } 31632035e776STheodore Ts'o 31642035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 31652035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 31662035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 31672035e776STheodore Ts'o "using the ext4 subsystem"); 31682035e776STheodore Ts'o else { 31692035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 31702035e776STheodore Ts'o "to feature incompatibilities"); 31712035e776STheodore Ts'o goto failed_mount; 31722035e776STheodore Ts'o } 31732035e776STheodore Ts'o } 31742035e776STheodore Ts'o 3175469108ffSTheodore Tso /* 3176ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3177ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3178ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3179ac27a0ecSDave Kleikamp */ 3180a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3181ac27a0ecSDave Kleikamp goto failed_mount; 3182a13fb1a4SEric Sandeen 3183617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3184617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3185b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3186b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3187ac27a0ecSDave Kleikamp goto failed_mount; 3188ac27a0ecSDave Kleikamp } 3189ac27a0ecSDave Kleikamp 3190ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3191ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3192ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3193b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3194ce40733cSAneesh Kumar K.V blocksize); 3195ac27a0ecSDave Kleikamp goto failed_mount; 3196ac27a0ecSDave Kleikamp } 3197ac27a0ecSDave Kleikamp 3198ac27a0ecSDave Kleikamp brelse(bh); 319970bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 320070bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 320170bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3202ac27a0ecSDave Kleikamp if (!bh) { 3203b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3204b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3205ac27a0ecSDave Kleikamp goto failed_mount; 3206ac27a0ecSDave Kleikamp } 3207617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 3208ac27a0ecSDave Kleikamp sbi->s_es = es; 3209617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3210b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3211b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3212ac27a0ecSDave Kleikamp goto failed_mount; 3213ac27a0ecSDave Kleikamp } 3214ac27a0ecSDave Kleikamp } 3215ac27a0ecSDave Kleikamp 3216a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3217a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3218f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3219f287a1a5STheodore Ts'o has_huge_files); 3220f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3221ac27a0ecSDave Kleikamp 3222617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3223617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3224617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3225ac27a0ecSDave Kleikamp } else { 3226ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3227ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3228617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 32291330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3230ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3231b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3232b31e1552SEric Sandeen "unsupported inode size: %d", 3233ac27a0ecSDave Kleikamp sbi->s_inode_size); 3234ac27a0ecSDave Kleikamp goto failed_mount; 3235ac27a0ecSDave Kleikamp } 3236ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3237ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3238ac27a0ecSDave Kleikamp } 32390b8e58a1SAndreas Dilger 32400d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 32410d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 32428fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 32430d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3244d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3245b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3246b31e1552SEric Sandeen "unsupported descriptor size %lu", 32470d1ee42fSAlexandre Ratchov sbi->s_desc_size); 32480d1ee42fSAlexandre Ratchov goto failed_mount; 32490d1ee42fSAlexandre Ratchov } 32500d1ee42fSAlexandre Ratchov } else 32510d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 32520b8e58a1SAndreas Dilger 3253ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3254ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3255b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3256617ba13bSMingming Cao goto cantfind_ext4; 32570b8e58a1SAndreas Dilger 3258617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3259ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3260617ba13bSMingming Cao goto cantfind_ext4; 3261ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3262ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 32630d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3264ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3265ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3266e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3267e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 32680b8e58a1SAndreas Dilger 3269ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3270ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3271ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3272f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3273f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3274f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3275f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3276f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3277f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3278f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3279f99b2589STheodore Ts'o #else 3280f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3281f99b2589STheodore Ts'o #endif 3282f99b2589STheodore Ts'o } 3283ac27a0ecSDave Kleikamp 3284281b5995STheodore Ts'o /* Handle clustersize */ 3285281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3286281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3287281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3288281b5995STheodore Ts'o if (has_bigalloc) { 3289281b5995STheodore Ts'o if (clustersize < blocksize) { 3290281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3291281b5995STheodore Ts'o "cluster size (%d) smaller than " 3292281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3293281b5995STheodore Ts'o goto failed_mount; 3294281b5995STheodore Ts'o } 3295281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3296281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3297281b5995STheodore Ts'o sbi->s_clusters_per_group = 3298281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3299281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3300281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3301281b5995STheodore Ts'o "#clusters per group too big: %lu", 3302281b5995STheodore Ts'o sbi->s_clusters_per_group); 3303281b5995STheodore Ts'o goto failed_mount; 3304281b5995STheodore Ts'o } 3305281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3306281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3307281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3308281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3309281b5995STheodore Ts'o sbi->s_blocks_per_group, 3310281b5995STheodore Ts'o sbi->s_clusters_per_group); 3311281b5995STheodore Ts'o goto failed_mount; 3312281b5995STheodore Ts'o } 3313281b5995STheodore Ts'o } else { 3314281b5995STheodore Ts'o if (clustersize != blocksize) { 3315281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3316281b5995STheodore Ts'o "block size (%d)", clustersize, 3317281b5995STheodore Ts'o blocksize); 3318281b5995STheodore Ts'o clustersize = blocksize; 3319281b5995STheodore Ts'o } 3320ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3321b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3322b31e1552SEric Sandeen "#blocks per group too big: %lu", 3323ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3324ac27a0ecSDave Kleikamp goto failed_mount; 3325ac27a0ecSDave Kleikamp } 3326281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3327281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3328281b5995STheodore Ts'o } 3329281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3330281b5995STheodore Ts'o 3331ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3332b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3333b31e1552SEric Sandeen "#inodes per group too big: %lu", 3334ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3335ac27a0ecSDave Kleikamp goto failed_mount; 3336ac27a0ecSDave Kleikamp } 3337ac27a0ecSDave Kleikamp 3338bf43d84bSEric Sandeen /* 3339bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3340bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3341bf43d84bSEric Sandeen */ 33425a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 334330ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 33445a9ae68aSDarrick J. Wong if (err) { 3345b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3346bf43d84bSEric Sandeen " too large to mount safely on this system"); 3347ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 334890c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 33495a9ae68aSDarrick J. Wong ret = err; 3350ac27a0ecSDave Kleikamp goto failed_mount; 3351ac27a0ecSDave Kleikamp } 3352ac27a0ecSDave Kleikamp 3353617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3354617ba13bSMingming Cao goto cantfind_ext4; 3355e7c95593SEric Sandeen 33560f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 33570f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 33580f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3359b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3360b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 33610f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 33620f2ddca6SFrom: Thiemo Nagel goto failed_mount; 33630f2ddca6SFrom: Thiemo Nagel } 33640f2ddca6SFrom: Thiemo Nagel 33654ec11028STheodore Ts'o /* 33664ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 33674ec11028STheodore Ts'o * of the filesystem. 33684ec11028STheodore Ts'o */ 33694ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3370b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3371b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3372e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 33734ec11028STheodore Ts'o ext4_blocks_count(es)); 3374e7c95593SEric Sandeen goto failed_mount; 3375e7c95593SEric Sandeen } 3376bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3377bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3378bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3379bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 33804ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3381b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 33824ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3383b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 33844ec11028STheodore Ts'o ext4_blocks_count(es), 33854ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 33864ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 33874ec11028STheodore Ts'o goto failed_mount; 33884ec11028STheodore Ts'o } 3389bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3390fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3391fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3392617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3393617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3394f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3395f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3396ac27a0ecSDave Kleikamp GFP_KERNEL); 3397ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3398b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 3399ac27a0ecSDave Kleikamp goto failed_mount; 3400ac27a0ecSDave Kleikamp } 3401ac27a0ecSDave Kleikamp 34029f6200bbSTheodore Ts'o if (ext4_proc_root) 34039f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3404240799cdSTheodore Ts'o 340566acdcf4STheodore Ts'o if (sbi->s_proc) 340666acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 340766acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 340866acdcf4STheodore Ts'o 3409705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3410ac27a0ecSDave Kleikamp 3411ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 341270bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3413ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3414ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3415b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3416b31e1552SEric Sandeen "can't read group descriptor %d", i); 3417ac27a0ecSDave Kleikamp db_count = i; 3418ac27a0ecSDave Kleikamp goto failed_mount2; 3419ac27a0ecSDave Kleikamp } 3420ac27a0ecSDave Kleikamp } 3421bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3422b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3423ac27a0ecSDave Kleikamp goto failed_mount2; 3424ac27a0ecSDave Kleikamp } 3425772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3426772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3427b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3428b31e1552SEric Sandeen "unable to initialize " 3429b31e1552SEric Sandeen "flex_bg meta info!"); 3430772cb7c8SJose R. Santos goto failed_mount2; 3431772cb7c8SJose R. Santos } 3432772cb7c8SJose R. Santos 3433ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3434ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3435ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3436ac27a0ecSDave Kleikamp 343704496411STao Ma init_timer(&sbi->s_err_report); 343804496411STao Ma sbi->s_err_report.function = print_daily_error_info; 343904496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 344004496411STao Ma 344157042651STheodore Ts'o err = percpu_counter_init(&sbi->s_freeclusters_counter, 34425dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3443ce7e010aSTheodore Ts'o if (!err) { 3444ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3445ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3446ce7e010aSTheodore Ts'o } 3447ce7e010aSTheodore Ts'o if (!err) { 3448ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3449ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3450ce7e010aSTheodore Ts'o } 3451ce7e010aSTheodore Ts'o if (!err) { 345257042651STheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); 3453ce7e010aSTheodore Ts'o } 3454ce7e010aSTheodore Ts'o if (err) { 3455ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 3456ce7e010aSTheodore Ts'o goto failed_mount3; 3457ce7e010aSTheodore Ts'o } 3458ce7e010aSTheodore Ts'o 3459c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 346055138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 3461c9de560dSAlex Tomas 3462ac27a0ecSDave Kleikamp /* 3463ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3464ac27a0ecSDave Kleikamp */ 34659ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 34669ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3467617ba13bSMingming Cao sb->s_op = &ext4_sops; 34689ca92389STheodore Ts'o else 34699ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3470617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3471617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3472ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3473617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 3474617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3475ac27a0ecSDave Kleikamp #endif 3476f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3477f2fa2ffcSAneesh Kumar K.V 3478ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 34793b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 34808f82f840SYongqiang Yang sbi->s_resize_flags = 0; 3481ac27a0ecSDave Kleikamp 3482ac27a0ecSDave Kleikamp sb->s_root = NULL; 3483ac27a0ecSDave Kleikamp 3484ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3485617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3486617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3487ac27a0ecSDave Kleikamp 3488c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3489c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3490c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 3491c5e06d10SJohann Lombardi goto failed_mount3; 3492c5e06d10SJohann Lombardi 3493ac27a0ecSDave Kleikamp /* 3494ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3495ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3496ac27a0ecSDave Kleikamp */ 3497ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3498617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3499617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3500ac27a0ecSDave Kleikamp goto failed_mount3; 35010390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 35020390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3503b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3504b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3505744692dcSJiaying Zhang goto failed_mount_wq; 3506ac27a0ecSDave Kleikamp } else { 3507fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 35080390131bSFrank Mayhar sbi->s_journal = NULL; 35090390131bSFrank Mayhar needs_recovery = 0; 35100390131bSFrank Mayhar goto no_journal; 3511ac27a0ecSDave Kleikamp } 3512ac27a0ecSDave Kleikamp 3513eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 3514eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3515eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3516b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3517744692dcSJiaying Zhang goto failed_mount_wq; 3518eb40a09cSJose R. Santos } 3519eb40a09cSJose R. Santos 3520d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 3521d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 3522d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3523d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3524d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 3525818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 3526818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 3527818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3528818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3529d4da6c9cSLinus Torvalds } else { 3530d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 3531d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3532d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3533d4da6c9cSLinus Torvalds } 3534818d276cSGirish Shilamkar 3535ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3536ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3537ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3538ac27a0ecSDave Kleikamp case 0: 3539ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 354063f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 354163f57933SAndrew Morton * cope, else JOURNAL_DATA 354263f57933SAndrew Morton */ 3543dab291afSMingming Cao if (jbd2_journal_check_available_features 3544dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3545fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3546ac27a0ecSDave Kleikamp else 3547fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3548ac27a0ecSDave Kleikamp break; 3549ac27a0ecSDave Kleikamp 3550617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3551617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3552dab291afSMingming Cao if (!jbd2_journal_check_available_features 3553dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3554b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3555b31e1552SEric Sandeen "requested data journaling mode"); 3556744692dcSJiaying Zhang goto failed_mount_wq; 3557ac27a0ecSDave Kleikamp } 3558ac27a0ecSDave Kleikamp default: 3559ac27a0ecSDave Kleikamp break; 3560ac27a0ecSDave Kleikamp } 3561b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3562ac27a0ecSDave Kleikamp 356318aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 356418aadd47SBobi Jam 3565ce7e010aSTheodore Ts'o /* 3566ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 3567ce7e010aSTheodore Ts'o * need to update the global counters. 3568ce7e010aSTheodore Ts'o */ 356957042651STheodore Ts'o percpu_counter_set(&sbi->s_freeclusters_counter, 35705dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3571ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 357284061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 3573ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 357484061e07SDmitry Monakhov ext4_count_dirs(sb)); 357557042651STheodore Ts'o percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); 3576206f7ab4SChristoph Hellwig 3577ce7e010aSTheodore Ts'o no_journal: 3578fd89d5f2STejun Heo /* 3579fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 3580fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 3581fd89d5f2STejun Heo */ 3582fd89d5f2STejun Heo EXT4_SB(sb)->dio_unwritten_wq = 3583ae005cbeSLinus Torvalds alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 35844c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 35854c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 35864c0425ffSMingming Cao goto failed_mount_wq; 35874c0425ffSMingming Cao } 35884c0425ffSMingming Cao 3589ac27a0ecSDave Kleikamp /* 3590dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3591ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3592ac27a0ecSDave Kleikamp */ 3593ac27a0ecSDave Kleikamp 35941d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 35951d1fe1eeSDavid Howells if (IS_ERR(root)) { 3596b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 35971d1fe1eeSDavid Howells ret = PTR_ERR(root); 359832a9bb57SManish Katiyar root = NULL; 3599ac27a0ecSDave Kleikamp goto failed_mount4; 3600ac27a0ecSDave Kleikamp } 3601ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3602b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 360394bf608aSAl Viro iput(root); 3604ac27a0ecSDave Kleikamp goto failed_mount4; 3605ac27a0ecSDave Kleikamp } 360648fde701SAl Viro sb->s_root = d_make_root(root); 36071d1fe1eeSDavid Howells if (!sb->s_root) { 3608b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 36091d1fe1eeSDavid Howells ret = -ENOMEM; 36101d1fe1eeSDavid Howells goto failed_mount4; 36111d1fe1eeSDavid Howells } 3612ac27a0ecSDave Kleikamp 3613617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 3614ef7f3835SKalpak Shah 3615ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3616ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3617ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3618ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3619ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3620ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3621ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3622ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3623ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3624ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3625ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3626ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3627ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3628ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3629ef7f3835SKalpak Shah } 3630ef7f3835SKalpak Shah } 3631ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3632ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3633ef7f3835SKalpak Shah sbi->s_inode_size) { 3634ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3635ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3636b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3637b31e1552SEric Sandeen "available"); 3638ef7f3835SKalpak Shah } 3639ef7f3835SKalpak Shah 36406fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 36416fd058f7STheodore Ts'o if (err) { 3642b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3643fbe845ddSCurt Wohlgemuth "zone (%d)", err); 364494bf608aSAl Viro goto failed_mount4a; 36456fd058f7STheodore Ts'o } 36466fd058f7STheodore Ts'o 3647c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 3648c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 3649c2774d84SAneesh Kumar K.V if (err) { 3650421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3651c2774d84SAneesh Kumar K.V err); 3652dcf2d804STao Ma goto failed_mount5; 3653c2774d84SAneesh Kumar K.V } 3654c2774d84SAneesh Kumar K.V 3655bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3656bfff6873SLukas Czerner if (err) 3657dcf2d804STao Ma goto failed_mount6; 3658bfff6873SLukas Czerner 36593197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 36603197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 36613197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 36623197ebdbSTheodore Ts'o "%s", sb->s_id); 3663dcf2d804STao Ma if (err) 3664dcf2d804STao Ma goto failed_mount7; 36653197ebdbSTheodore Ts'o 3666617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3667617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3668617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 36690390131bSFrank Mayhar if (needs_recovery) { 3670b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3671617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 36720390131bSFrank Mayhar } 36730390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 36740390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 36750390131bSFrank Mayhar descr = " journalled data mode"; 36760390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 36770390131bSFrank Mayhar descr = " ordered data mode"; 36780390131bSFrank Mayhar else 36790390131bSFrank Mayhar descr = " writeback data mode"; 36800390131bSFrank Mayhar } else 36810390131bSFrank Mayhar descr = "out journal"; 36820390131bSFrank Mayhar 3683d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 36848b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 36858b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 3686ac27a0ecSDave Kleikamp 368766e61a9eSTheodore Ts'o if (es->s_error_count) 368866e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 3689ac27a0ecSDave Kleikamp 3690d4c402d9SCurt Wohlgemuth kfree(orig_data); 3691ac27a0ecSDave Kleikamp return 0; 3692ac27a0ecSDave Kleikamp 3693617ba13bSMingming Cao cantfind_ext4: 3694ac27a0ecSDave Kleikamp if (!silent) 3695b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3696ac27a0ecSDave Kleikamp goto failed_mount; 3697ac27a0ecSDave Kleikamp 3698dcf2d804STao Ma failed_mount7: 3699dcf2d804STao Ma ext4_unregister_li_request(sb); 3700dcf2d804STao Ma failed_mount6: 3701dcf2d804STao Ma ext4_mb_release(sb); 370294bf608aSAl Viro failed_mount5: 370394bf608aSAl Viro ext4_ext_release(sb); 3704dcf2d804STao Ma ext4_release_system_zone(sb); 370594bf608aSAl Viro failed_mount4a: 370694bf608aSAl Viro dput(sb->s_root); 370732a9bb57SManish Katiyar sb->s_root = NULL; 370894bf608aSAl Viro failed_mount4: 3709b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 37104c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 37114c0425ffSMingming Cao failed_mount_wq: 37120390131bSFrank Mayhar if (sbi->s_journal) { 3713dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 371447b4a50bSJan Kara sbi->s_journal = NULL; 37150390131bSFrank Mayhar } 3716ac27a0ecSDave Kleikamp failed_mount3: 371704496411STao Ma del_timer(&sbi->s_err_report); 37189933fc0aSTheodore Ts'o if (sbi->s_flex_groups) 37199933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 372057042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 3721ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 3722ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 372357042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 3724c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 3725c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 3726ac27a0ecSDave Kleikamp failed_mount2: 3727ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 3728ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 3729f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 3730ac27a0ecSDave Kleikamp failed_mount: 3731240799cdSTheodore Ts'o if (sbi->s_proc) { 373266acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 37339f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 3734240799cdSTheodore Ts'o } 3735ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3736ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3737ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3738ac27a0ecSDave Kleikamp #endif 3739617ba13bSMingming Cao ext4_blkdev_remove(sbi); 3740ac27a0ecSDave Kleikamp brelse(bh); 3741ac27a0ecSDave Kleikamp out_fail: 3742ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 3743f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 3744ac27a0ecSDave Kleikamp kfree(sbi); 3745dcc7dae3SCyrill Gorcunov out_free_orig: 3746d4c402d9SCurt Wohlgemuth kfree(orig_data); 37471d1fe1eeSDavid Howells return ret; 3748ac27a0ecSDave Kleikamp } 3749ac27a0ecSDave Kleikamp 3750ac27a0ecSDave Kleikamp /* 3751ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 3752ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 3753ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 3754ac27a0ecSDave Kleikamp */ 3755617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3756ac27a0ecSDave Kleikamp { 3757617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3758ac27a0ecSDave Kleikamp 3759ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 376030773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 376130773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3762ac27a0ecSDave Kleikamp 3763a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 3764ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3765dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3766ac27a0ecSDave Kleikamp else 3767dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 37685bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 37695bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 37705bf5683aSHidehiro Kawai else 37715bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3772a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 3773ac27a0ecSDave Kleikamp } 3774ac27a0ecSDave Kleikamp 3775617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3776ac27a0ecSDave Kleikamp unsigned int journal_inum) 3777ac27a0ecSDave Kleikamp { 3778ac27a0ecSDave Kleikamp struct inode *journal_inode; 3779ac27a0ecSDave Kleikamp journal_t *journal; 3780ac27a0ecSDave Kleikamp 37810390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 37820390131bSFrank Mayhar 3783ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3784ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3785ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3786ac27a0ecSDave Kleikamp 37871d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 37881d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3789b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3790ac27a0ecSDave Kleikamp return NULL; 3791ac27a0ecSDave Kleikamp } 3792ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3793ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3794ac27a0ecSDave Kleikamp iput(journal_inode); 3795b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3796ac27a0ecSDave Kleikamp return NULL; 3797ac27a0ecSDave Kleikamp } 3798ac27a0ecSDave Kleikamp 3799e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3800ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 38011d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3802b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3803ac27a0ecSDave Kleikamp iput(journal_inode); 3804ac27a0ecSDave Kleikamp return NULL; 3805ac27a0ecSDave Kleikamp } 3806ac27a0ecSDave Kleikamp 3807dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3808ac27a0ecSDave Kleikamp if (!journal) { 3809b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3810ac27a0ecSDave Kleikamp iput(journal_inode); 3811ac27a0ecSDave Kleikamp return NULL; 3812ac27a0ecSDave Kleikamp } 3813ac27a0ecSDave Kleikamp journal->j_private = sb; 3814617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3815ac27a0ecSDave Kleikamp return journal; 3816ac27a0ecSDave Kleikamp } 3817ac27a0ecSDave Kleikamp 3818617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3819ac27a0ecSDave Kleikamp dev_t j_dev) 3820ac27a0ecSDave Kleikamp { 3821ac27a0ecSDave Kleikamp struct buffer_head *bh; 3822ac27a0ecSDave Kleikamp journal_t *journal; 3823617ba13bSMingming Cao ext4_fsblk_t start; 3824617ba13bSMingming Cao ext4_fsblk_t len; 3825ac27a0ecSDave Kleikamp int hblock, blocksize; 3826617ba13bSMingming Cao ext4_fsblk_t sb_block; 3827ac27a0ecSDave Kleikamp unsigned long offset; 3828617ba13bSMingming Cao struct ext4_super_block *es; 3829ac27a0ecSDave Kleikamp struct block_device *bdev; 3830ac27a0ecSDave Kleikamp 38310390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 38320390131bSFrank Mayhar 3833b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3834ac27a0ecSDave Kleikamp if (bdev == NULL) 3835ac27a0ecSDave Kleikamp return NULL; 3836ac27a0ecSDave Kleikamp 3837ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3838e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3839ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3840b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3841b31e1552SEric Sandeen "blocksize too small for journal device"); 3842ac27a0ecSDave Kleikamp goto out_bdev; 3843ac27a0ecSDave Kleikamp } 3844ac27a0ecSDave Kleikamp 3845617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3846617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3847ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3848ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3849b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3850b31e1552SEric Sandeen "external journal"); 3851ac27a0ecSDave Kleikamp goto out_bdev; 3852ac27a0ecSDave Kleikamp } 3853ac27a0ecSDave Kleikamp 3854617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3855617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3856ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3857617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3858b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3859b31e1552SEric Sandeen "bad superblock"); 3860ac27a0ecSDave Kleikamp brelse(bh); 3861ac27a0ecSDave Kleikamp goto out_bdev; 3862ac27a0ecSDave Kleikamp } 3863ac27a0ecSDave Kleikamp 3864617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3865b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3866ac27a0ecSDave Kleikamp brelse(bh); 3867ac27a0ecSDave Kleikamp goto out_bdev; 3868ac27a0ecSDave Kleikamp } 3869ac27a0ecSDave Kleikamp 3870bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3871ac27a0ecSDave Kleikamp start = sb_block + 1; 3872ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3873ac27a0ecSDave Kleikamp 3874dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3875ac27a0ecSDave Kleikamp start, len, blocksize); 3876ac27a0ecSDave Kleikamp if (!journal) { 3877b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3878ac27a0ecSDave Kleikamp goto out_bdev; 3879ac27a0ecSDave Kleikamp } 3880ac27a0ecSDave Kleikamp journal->j_private = sb; 3881ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3882ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3883ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3884b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3885ac27a0ecSDave Kleikamp goto out_journal; 3886ac27a0ecSDave Kleikamp } 3887ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3888b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3889b31e1552SEric Sandeen "user (unsupported) - %d", 3890ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3891ac27a0ecSDave Kleikamp goto out_journal; 3892ac27a0ecSDave Kleikamp } 3893617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3894617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3895ac27a0ecSDave Kleikamp return journal; 38960b8e58a1SAndreas Dilger 3897ac27a0ecSDave Kleikamp out_journal: 3898dab291afSMingming Cao jbd2_journal_destroy(journal); 3899ac27a0ecSDave Kleikamp out_bdev: 3900617ba13bSMingming Cao ext4_blkdev_put(bdev); 3901ac27a0ecSDave Kleikamp return NULL; 3902ac27a0ecSDave Kleikamp } 3903ac27a0ecSDave Kleikamp 3904617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3905617ba13bSMingming Cao struct ext4_super_block *es, 3906ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3907ac27a0ecSDave Kleikamp { 3908ac27a0ecSDave Kleikamp journal_t *journal; 3909ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3910ac27a0ecSDave Kleikamp dev_t journal_dev; 3911ac27a0ecSDave Kleikamp int err = 0; 3912ac27a0ecSDave Kleikamp int really_read_only; 3913ac27a0ecSDave Kleikamp 39140390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 39150390131bSFrank Mayhar 3916ac27a0ecSDave Kleikamp if (journal_devnum && 3917ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3918b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3919b31e1552SEric Sandeen "numbers have changed"); 3920ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3921ac27a0ecSDave Kleikamp } else 3922ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3923ac27a0ecSDave Kleikamp 3924ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3925ac27a0ecSDave Kleikamp 3926ac27a0ecSDave Kleikamp /* 3927ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3928ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3929ac27a0ecSDave Kleikamp * can get read-write access to the device. 3930ac27a0ecSDave Kleikamp */ 3931617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3932ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3933b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3934b31e1552SEric Sandeen "required on readonly filesystem"); 3935ac27a0ecSDave Kleikamp if (really_read_only) { 3936b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3937b31e1552SEric Sandeen "unavailable, cannot proceed"); 3938ac27a0ecSDave Kleikamp return -EROFS; 3939ac27a0ecSDave Kleikamp } 3940b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 3941b31e1552SEric Sandeen "be enabled during recovery"); 3942ac27a0ecSDave Kleikamp } 3943ac27a0ecSDave Kleikamp } 3944ac27a0ecSDave Kleikamp 3945ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3946b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 3947b31e1552SEric Sandeen "and inode journals!"); 3948ac27a0ecSDave Kleikamp return -EINVAL; 3949ac27a0ecSDave Kleikamp } 3950ac27a0ecSDave Kleikamp 3951ac27a0ecSDave Kleikamp if (journal_inum) { 3952617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3953ac27a0ecSDave Kleikamp return -EINVAL; 3954ac27a0ecSDave Kleikamp } else { 3955617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3956ac27a0ecSDave Kleikamp return -EINVAL; 3957ac27a0ecSDave Kleikamp } 3958ac27a0ecSDave Kleikamp 395990576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 3960b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 39614776004fSTheodore Ts'o 3962617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3963dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 39641c13d5c0STheodore Ts'o if (!err) { 39651c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 39661c13d5c0STheodore Ts'o if (save) 39671c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 39681c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 3969dab291afSMingming Cao err = jbd2_journal_load(journal); 39701c13d5c0STheodore Ts'o if (save) 39711c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 39721c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 39731c13d5c0STheodore Ts'o kfree(save); 39741c13d5c0STheodore Ts'o } 3975ac27a0ecSDave Kleikamp 3976ac27a0ecSDave Kleikamp if (err) { 3977b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 3978dab291afSMingming Cao jbd2_journal_destroy(journal); 3979ac27a0ecSDave Kleikamp return err; 3980ac27a0ecSDave Kleikamp } 3981ac27a0ecSDave Kleikamp 3982617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 3983617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3984ac27a0ecSDave Kleikamp 3985c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 3986ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3987ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 3988ac27a0ecSDave Kleikamp 3989ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 3990e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3991ac27a0ecSDave Kleikamp } 3992ac27a0ecSDave Kleikamp 3993ac27a0ecSDave Kleikamp return 0; 3994ac27a0ecSDave Kleikamp } 3995ac27a0ecSDave Kleikamp 3996e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 3997ac27a0ecSDave Kleikamp { 3998e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3999617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4000c4be0c1dSTakashi Sato int error = 0; 4001ac27a0ecSDave Kleikamp 40027c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4003c4be0c1dSTakashi Sato return error; 4004914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4005914258bfSTheodore Ts'o /* 4006914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4007914258bfSTheodore Ts'o * superblock failed. This could happen because the 4008914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4009914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4010914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4011914258bfSTheodore Ts'o * write and hope for the best. 4012914258bfSTheodore Ts'o */ 4013b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4014b31e1552SEric Sandeen "superblock detected"); 4015914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4016914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4017914258bfSTheodore Ts'o } 401871290b36STheodore Ts'o /* 401971290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 402071290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 402171290b36STheodore Ts'o * write time when we are mounting the root file system 402271290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 402371290b36STheodore Ts'o * for people who are east of GMT and who make their clock 402471290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 402571290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 402671290b36STheodore Ts'o * to complain and force a full file system check. 402771290b36STheodore Ts'o */ 402871290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4029ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4030f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4031afc32f7eSTheodore Ts'o es->s_kbytes_written = 4032afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4033afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4034afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4035f613dfcbSTheodore Ts'o else 4036f613dfcbSTheodore Ts'o es->s_kbytes_written = 4037f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 403857042651STheodore Ts'o ext4_free_blocks_count_set(es, 403957042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 404057042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 40417f93cff9STheodore Ts'o es->s_free_inodes_count = 40427f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 40435d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 40447234ab2aSTheodore Ts'o sb->s_dirt = 0; 4045ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 4046ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4047914258bfSTheodore Ts'o if (sync) { 4048c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4049c4be0c1dSTakashi Sato if (error) 4050c4be0c1dSTakashi Sato return error; 4051c4be0c1dSTakashi Sato 4052c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4053c4be0c1dSTakashi Sato if (error) { 4054b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4055b31e1552SEric Sandeen "superblock"); 4056914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4057914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4058914258bfSTheodore Ts'o } 4059914258bfSTheodore Ts'o } 4060c4be0c1dSTakashi Sato return error; 4061ac27a0ecSDave Kleikamp } 4062ac27a0ecSDave Kleikamp 4063ac27a0ecSDave Kleikamp /* 4064ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4065ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4066ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4067ac27a0ecSDave Kleikamp */ 4068617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4069617ba13bSMingming Cao struct ext4_super_block *es) 4070ac27a0ecSDave Kleikamp { 4071617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4072ac27a0ecSDave Kleikamp 40730390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 40740390131bSFrank Mayhar BUG_ON(journal != NULL); 40750390131bSFrank Mayhar return; 40760390131bSFrank Mayhar } 4077dab291afSMingming Cao jbd2_journal_lock_updates(journal); 40787ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 40797ffe1ea8SHidehiro Kawai goto out; 40807ffe1ea8SHidehiro Kawai 4081617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4082ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4083617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4084e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4085ac27a0ecSDave Kleikamp } 40867ffe1ea8SHidehiro Kawai 40877ffe1ea8SHidehiro Kawai out: 4088dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4089ac27a0ecSDave Kleikamp } 4090ac27a0ecSDave Kleikamp 4091ac27a0ecSDave Kleikamp /* 4092ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4093ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4094ac27a0ecSDave Kleikamp * main filesystem now. 4095ac27a0ecSDave Kleikamp */ 4096617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4097617ba13bSMingming Cao struct ext4_super_block *es) 4098ac27a0ecSDave Kleikamp { 4099ac27a0ecSDave Kleikamp journal_t *journal; 4100ac27a0ecSDave Kleikamp int j_errno; 4101ac27a0ecSDave Kleikamp const char *errstr; 4102ac27a0ecSDave Kleikamp 41030390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 41040390131bSFrank Mayhar 4105617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4106ac27a0ecSDave Kleikamp 4107ac27a0ecSDave Kleikamp /* 4108ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4109617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4110ac27a0ecSDave Kleikamp */ 4111ac27a0ecSDave Kleikamp 4112dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4113ac27a0ecSDave Kleikamp if (j_errno) { 4114ac27a0ecSDave Kleikamp char nbuf[16]; 4115ac27a0ecSDave Kleikamp 4116617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 411712062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4118ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 411912062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4120ac27a0ecSDave Kleikamp 4121617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4122617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4123e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4124ac27a0ecSDave Kleikamp 4125dab291afSMingming Cao jbd2_journal_clear_err(journal); 4126ac27a0ecSDave Kleikamp } 4127ac27a0ecSDave Kleikamp } 4128ac27a0ecSDave Kleikamp 4129ac27a0ecSDave Kleikamp /* 4130ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4131ac27a0ecSDave Kleikamp * and wait on the commit. 4132ac27a0ecSDave Kleikamp */ 4133617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4134ac27a0ecSDave Kleikamp { 4135ac27a0ecSDave Kleikamp journal_t *journal; 41360390131bSFrank Mayhar int ret = 0; 4137ac27a0ecSDave Kleikamp 4138ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4139ac27a0ecSDave Kleikamp return 0; 4140ac27a0ecSDave Kleikamp 4141617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 41426b0310fbSEric Sandeen if (journal) { 4143437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 4144617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 41456b0310fbSEric Sandeen } 41460390131bSFrank Mayhar 4147ac27a0ecSDave Kleikamp return ret; 4148ac27a0ecSDave Kleikamp } 4149ac27a0ecSDave Kleikamp 4150617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 4151ac27a0ecSDave Kleikamp { 4152ebc1ac16SChristoph Hellwig lock_super(sb); 4153e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4154ebc1ac16SChristoph Hellwig unlock_super(sb); 41550390131bSFrank Mayhar } 4156ac27a0ecSDave Kleikamp 4157617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4158ac27a0ecSDave Kleikamp { 415914ce0cb4STheodore Ts'o int ret = 0; 41609eddacf9SJan Kara tid_t target; 41618d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4162ac27a0ecSDave Kleikamp 41639bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 41648d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 41658d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4166ac27a0ecSDave Kleikamp if (wait) 41678d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 41680390131bSFrank Mayhar } 416914ce0cb4STheodore Ts'o return ret; 4170ac27a0ecSDave Kleikamp } 4171ac27a0ecSDave Kleikamp 4172ac27a0ecSDave Kleikamp /* 4173ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4174ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4175be4f27d3SYongqiang Yang * 4176be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 4177be4f27d3SYongqiang Yang * state independently, because ext4 prevents a new handle from being started 4178be4f27d3SYongqiang Yang * by @sb->s_frozen, which stays in an upper layer. It thus needs help from 4179be4f27d3SYongqiang Yang * the upper layer. 4180ac27a0ecSDave Kleikamp */ 4181c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4182ac27a0ecSDave Kleikamp { 4183c4be0c1dSTakashi Sato int error = 0; 4184c4be0c1dSTakashi Sato journal_t *journal; 4185ac27a0ecSDave Kleikamp 41869ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 41879ca92389STheodore Ts'o return 0; 41889ca92389STheodore Ts'o 4189c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4190ac27a0ecSDave Kleikamp 4191ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4192dab291afSMingming Cao jbd2_journal_lock_updates(journal); 41937ffe1ea8SHidehiro Kawai 41947ffe1ea8SHidehiro Kawai /* 41959ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 41969ca92389STheodore Ts'o * the journal. 41977ffe1ea8SHidehiro Kawai */ 4198c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 41996b0310fbSEric Sandeen if (error < 0) 42006b0310fbSEric Sandeen goto out; 4201ac27a0ecSDave Kleikamp 4202ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4203617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4204e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 42056b0310fbSEric Sandeen out: 42066b0310fbSEric Sandeen /* we rely on s_frozen to stop further updates */ 42076b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 42086b0310fbSEric Sandeen return error; 4209ac27a0ecSDave Kleikamp } 4210ac27a0ecSDave Kleikamp 4211ac27a0ecSDave Kleikamp /* 4212ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4213ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4214ac27a0ecSDave Kleikamp */ 4215c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4216ac27a0ecSDave Kleikamp { 42179ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 42189ca92389STheodore Ts'o return 0; 42199ca92389STheodore Ts'o 4220ac27a0ecSDave Kleikamp lock_super(sb); 42219ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4222617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4223e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4224ac27a0ecSDave Kleikamp unlock_super(sb); 4225c4be0c1dSTakashi Sato return 0; 4226ac27a0ecSDave Kleikamp } 4227ac27a0ecSDave Kleikamp 4228673c6100STheodore Ts'o /* 4229673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4230673c6100STheodore Ts'o */ 4231673c6100STheodore Ts'o struct ext4_mount_options { 4232673c6100STheodore Ts'o unsigned long s_mount_opt; 4233a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 4234673c6100STheodore Ts'o uid_t s_resuid; 4235673c6100STheodore Ts'o gid_t s_resgid; 4236673c6100STheodore Ts'o unsigned long s_commit_interval; 4237673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4238673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4239673c6100STheodore Ts'o int s_jquota_fmt; 4240673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4241673c6100STheodore Ts'o #endif 4242673c6100STheodore Ts'o }; 4243673c6100STheodore Ts'o 4244617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4245ac27a0ecSDave Kleikamp { 4246617ba13bSMingming Cao struct ext4_super_block *es; 4247617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4248ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4249617ba13bSMingming Cao struct ext4_mount_options old_opts; 4250c79d967dSChristoph Hellwig int enable_quota = 0; 42518a266467STheodore Ts'o ext4_group_t g; 4252b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4253c5e06d10SJohann Lombardi int err = 0; 4254ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4255ac27a0ecSDave Kleikamp int i; 4256ac27a0ecSDave Kleikamp #endif 4257d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4258ac27a0ecSDave Kleikamp 4259ac27a0ecSDave Kleikamp /* Store the original options */ 4260bbd6851aSAl Viro lock_super(sb); 4261ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4262ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4263a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4264ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4265ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4266ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 426730773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 426830773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4269ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4270ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4271ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4272ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 4273ac27a0ecSDave Kleikamp #endif 4274b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4275b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4276ac27a0ecSDave Kleikamp 4277ac27a0ecSDave Kleikamp /* 4278ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4279ac27a0ecSDave Kleikamp */ 4280661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4281ac27a0ecSDave Kleikamp err = -EINVAL; 4282ac27a0ecSDave Kleikamp goto restore_opts; 4283ac27a0ecSDave Kleikamp } 4284ac27a0ecSDave Kleikamp 42854ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4286c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4287ac27a0ecSDave Kleikamp 4288ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4289482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4290ac27a0ecSDave Kleikamp 4291ac27a0ecSDave Kleikamp es = sbi->s_es; 4292ac27a0ecSDave Kleikamp 4293b3881f74STheodore Ts'o if (sbi->s_journal) { 4294617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4295b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4296b3881f74STheodore Ts'o } 4297ac27a0ecSDave Kleikamp 4298661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 42994ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4300ac27a0ecSDave Kleikamp err = -EROFS; 4301ac27a0ecSDave Kleikamp goto restore_opts; 4302ac27a0ecSDave Kleikamp } 4303ac27a0ecSDave Kleikamp 4304ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 43050f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 43060f0dd62fSChristoph Hellwig if (err < 0) 4307c79d967dSChristoph Hellwig goto restore_opts; 4308c79d967dSChristoph Hellwig 4309ac27a0ecSDave Kleikamp /* 4310ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4311ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4312ac27a0ecSDave Kleikamp */ 4313ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4314ac27a0ecSDave Kleikamp 4315ac27a0ecSDave Kleikamp /* 4316ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4317ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4318ac27a0ecSDave Kleikamp * mark the partition as valid again. 4319ac27a0ecSDave Kleikamp */ 4320617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4321617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4322ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4323ac27a0ecSDave Kleikamp 4324a63c9eb2STheodore Ts'o if (sbi->s_journal) 4325617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4326ac27a0ecSDave Kleikamp } else { 4327a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4328a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4329ac27a0ecSDave Kleikamp err = -EROFS; 4330ac27a0ecSDave Kleikamp goto restore_opts; 4331ac27a0ecSDave Kleikamp } 4332ead6596bSEric Sandeen /* 43338a266467STheodore Ts'o * Make sure the group descriptor checksums 43340b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 43358a266467STheodore Ts'o */ 43368a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 43378a266467STheodore Ts'o struct ext4_group_desc *gdp = 43388a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 43398a266467STheodore Ts'o 43408a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 4341b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4342b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 43438a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 43448a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 43458a266467STheodore Ts'o err = -EINVAL; 43468a266467STheodore Ts'o goto restore_opts; 43478a266467STheodore Ts'o } 43488a266467STheodore Ts'o } 43498a266467STheodore Ts'o 43508a266467STheodore Ts'o /* 4351ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4352ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4353ead6596bSEric Sandeen * require a full umount/remount for now. 4354ead6596bSEric Sandeen */ 4355ead6596bSEric Sandeen if (es->s_last_orphan) { 4356b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4357ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4358ead6596bSEric Sandeen "orphan inode list. Please " 4359b31e1552SEric Sandeen "umount/remount instead"); 4360ead6596bSEric Sandeen err = -EINVAL; 4361ead6596bSEric Sandeen goto restore_opts; 4362ead6596bSEric Sandeen } 4363ead6596bSEric Sandeen 4364ac27a0ecSDave Kleikamp /* 4365ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4366ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4367ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4368ac27a0ecSDave Kleikamp * the partition.) 4369ac27a0ecSDave Kleikamp */ 43700390131bSFrank Mayhar if (sbi->s_journal) 4371617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4372ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4373617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4374ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4375c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4376c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4377c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4378c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4379c5e06d10SJohann Lombardi err = -EROFS; 4380c5e06d10SJohann Lombardi goto restore_opts; 4381c5e06d10SJohann Lombardi } 4382c79d967dSChristoph Hellwig enable_quota = 1; 4383ac27a0ecSDave Kleikamp } 4384ac27a0ecSDave Kleikamp } 4385bfff6873SLukas Czerner 4386bfff6873SLukas Czerner /* 4387bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4388bfff6873SLukas Czerner * current settings 4389bfff6873SLukas Czerner */ 4390bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4391bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4392bfff6873SLukas Czerner else { 4393bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4394bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4395bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4396bfff6873SLukas Czerner } 4397bfff6873SLukas Czerner 43986fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 43990390131bSFrank Mayhar if (sbi->s_journal == NULL) 4400e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 44010390131bSFrank Mayhar 4402ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4403ac27a0ecSDave Kleikamp /* Release old quota file names */ 4404ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4405ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 4406ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4407ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 4408ac27a0ecSDave Kleikamp #endif 4409bbd6851aSAl Viro unlock_super(sb); 4410c79d967dSChristoph Hellwig if (enable_quota) 44110f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 4412d4c402d9SCurt Wohlgemuth 4413d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4414d4c402d9SCurt Wohlgemuth kfree(orig_data); 4415ac27a0ecSDave Kleikamp return 0; 44160b8e58a1SAndreas Dilger 4417ac27a0ecSDave Kleikamp restore_opts: 4418ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4419ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4420a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4421ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4422ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4423ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 442430773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 442530773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4426ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4427ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4428ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4429ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 4430ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4431ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4432ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4433ac27a0ecSDave Kleikamp } 4434ac27a0ecSDave Kleikamp #endif 4435bbd6851aSAl Viro unlock_super(sb); 4436d4c402d9SCurt Wohlgemuth kfree(orig_data); 4437ac27a0ecSDave Kleikamp return err; 4438ac27a0ecSDave Kleikamp } 4439ac27a0ecSDave Kleikamp 4440f975d6bcSTheodore Ts'o /* 4441f975d6bcSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 4442f975d6bcSTheodore Ts'o * historical BSD practice is quite difficult in the face of 4443f975d6bcSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 4444f975d6bcSTheodore Ts'o * different block group can end up in the same allocation cluster. 4445f975d6bcSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 4446f975d6bcSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 4447f975d6bcSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 4448f975d6bcSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 4449f975d6bcSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 4450f975d6bcSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 4451f975d6bcSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 4452f975d6bcSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 4453f975d6bcSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 4454f975d6bcSTheodore Ts'o */ 4455617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4456ac27a0ecSDave Kleikamp { 4457ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4458617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4459617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 4460f975d6bcSTheodore Ts'o struct ext4_group_desc *gdp; 4461960cc398SPekka Enberg u64 fsid; 4462d02a9391SKazuya Mio s64 bfree; 4463ac27a0ecSDave Kleikamp 44645e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 44655e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 4466f975d6bcSTheodore Ts'o } else if (es->s_overhead_clusters) { 4467f975d6bcSTheodore Ts'o sbi->s_overhead_last = le32_to_cpu(es->s_overhead_clusters); 44686bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 44698df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 44705e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 4471ac27a0ecSDave Kleikamp 4472ac27a0ecSDave Kleikamp /* 44735e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 44745e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 44755e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 4476ac27a0ecSDave Kleikamp */ 4477ac27a0ecSDave Kleikamp 4478ac27a0ecSDave Kleikamp /* 4479ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 4480ac27a0ecSDave Kleikamp * overhead 4481ac27a0ecSDave Kleikamp */ 4482f975d6bcSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4483ac27a0ecSDave Kleikamp 4484ac27a0ecSDave Kleikamp /* 4485f975d6bcSTheodore Ts'o * Add the overhead found in each block group 4486ac27a0ecSDave Kleikamp */ 4487ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 4488f975d6bcSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 4489f975d6bcSTheodore Ts'o overhead += ext4_num_overhead_clusters(sb, i, gdp); 4490ac27a0ecSDave Kleikamp cond_resched(); 4491ac27a0ecSDave Kleikamp } 44925e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 44935e70030dSBadari Pulavarty smp_wmb(); 44946bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 4495ac27a0ecSDave Kleikamp } 4496ac27a0ecSDave Kleikamp 4497617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4498ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 4499f975d6bcSTheodore Ts'o buf->f_blocks = (ext4_blocks_count(es) - 4500f975d6bcSTheodore Ts'o EXT4_C2B(sbi, sbi->s_overhead_last)); 450157042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 450257042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 4503d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 450457042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 4505bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 4506bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 4507ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4508ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 450952d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4510617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4511960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4512960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4513960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4514960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 45150b8e58a1SAndreas Dilger 4516ac27a0ecSDave Kleikamp return 0; 4517ac27a0ecSDave Kleikamp } 4518ac27a0ecSDave Kleikamp 45190b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 45200b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4521ac27a0ecSDave Kleikamp * Process 1 Process 2 4522617ba13bSMingming Cao * ext4_create() quota_sync() 4523dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4524871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4525dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4526ac27a0ecSDave Kleikamp * 4527ac27a0ecSDave Kleikamp */ 4528ac27a0ecSDave Kleikamp 4529ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4530ac27a0ecSDave Kleikamp 4531ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4532ac27a0ecSDave Kleikamp { 4533ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 4534ac27a0ecSDave Kleikamp } 4535ac27a0ecSDave Kleikamp 4536617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4537ac27a0ecSDave Kleikamp { 4538ac27a0ecSDave Kleikamp int ret, err; 4539ac27a0ecSDave Kleikamp handle_t *handle; 4540ac27a0ecSDave Kleikamp struct inode *inode; 4541ac27a0ecSDave Kleikamp 4542ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 4543617ba13bSMingming Cao handle = ext4_journal_start(inode, 4544617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4545ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4546ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4547ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4548617ba13bSMingming Cao err = ext4_journal_stop(handle); 4549ac27a0ecSDave Kleikamp if (!ret) 4550ac27a0ecSDave Kleikamp ret = err; 4551ac27a0ecSDave Kleikamp return ret; 4552ac27a0ecSDave Kleikamp } 4553ac27a0ecSDave Kleikamp 4554617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4555ac27a0ecSDave Kleikamp { 4556ac27a0ecSDave Kleikamp int ret, err; 4557ac27a0ecSDave Kleikamp handle_t *handle; 4558ac27a0ecSDave Kleikamp 4559617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4560617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4561ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4562ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4563ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4564617ba13bSMingming Cao err = ext4_journal_stop(handle); 4565ac27a0ecSDave Kleikamp if (!ret) 4566ac27a0ecSDave Kleikamp ret = err; 4567ac27a0ecSDave Kleikamp return ret; 4568ac27a0ecSDave Kleikamp } 4569ac27a0ecSDave Kleikamp 4570617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4571ac27a0ecSDave Kleikamp { 4572ac27a0ecSDave Kleikamp int ret, err; 4573ac27a0ecSDave Kleikamp handle_t *handle; 4574ac27a0ecSDave Kleikamp 4575617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4576617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 45779c3013e9SJan Kara if (IS_ERR(handle)) { 45789c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 45799c3013e9SJan Kara dquot_release(dquot); 4580ac27a0ecSDave Kleikamp return PTR_ERR(handle); 45819c3013e9SJan Kara } 4582ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4583617ba13bSMingming Cao err = ext4_journal_stop(handle); 4584ac27a0ecSDave Kleikamp if (!ret) 4585ac27a0ecSDave Kleikamp ret = err; 4586ac27a0ecSDave Kleikamp return ret; 4587ac27a0ecSDave Kleikamp } 4588ac27a0ecSDave Kleikamp 4589617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4590ac27a0ecSDave Kleikamp { 45912c8be6b2SJan Kara /* Are we journaling quotas? */ 4592617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 4593617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 4594ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4595617ba13bSMingming Cao return ext4_write_dquot(dquot); 4596ac27a0ecSDave Kleikamp } else { 4597ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4598ac27a0ecSDave Kleikamp } 4599ac27a0ecSDave Kleikamp } 4600ac27a0ecSDave Kleikamp 4601617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4602ac27a0ecSDave Kleikamp { 4603ac27a0ecSDave Kleikamp int ret, err; 4604ac27a0ecSDave Kleikamp handle_t *handle; 4605ac27a0ecSDave Kleikamp 4606ac27a0ecSDave Kleikamp /* Data block + inode block */ 4607617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 4608ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4609ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4610ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4611617ba13bSMingming Cao err = ext4_journal_stop(handle); 4612ac27a0ecSDave Kleikamp if (!ret) 4613ac27a0ecSDave Kleikamp ret = err; 4614ac27a0ecSDave Kleikamp return ret; 4615ac27a0ecSDave Kleikamp } 4616ac27a0ecSDave Kleikamp 4617ac27a0ecSDave Kleikamp /* 4618ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4619ac27a0ecSDave Kleikamp * the quota file and such... 4620ac27a0ecSDave Kleikamp */ 4621617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4622ac27a0ecSDave Kleikamp { 4623287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4624617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4625ac27a0ecSDave Kleikamp } 4626ac27a0ecSDave Kleikamp 4627ac27a0ecSDave Kleikamp /* 4628ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4629ac27a0ecSDave Kleikamp */ 4630617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4631f00c9e44SJan Kara struct path *path) 4632ac27a0ecSDave Kleikamp { 4633ac27a0ecSDave Kleikamp int err; 4634ac27a0ecSDave Kleikamp 4635ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4636ac27a0ecSDave Kleikamp return -EINVAL; 46370623543bSJan Kara 4638ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 4639d8c9584eSAl Viro if (path->dentry->d_sb != sb) 4640ac27a0ecSDave Kleikamp return -EXDEV; 46410623543bSJan Kara /* Journaling quota? */ 46420623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 46432b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 4644f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 4645b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4646b31e1552SEric Sandeen "Quota file not on filesystem root. " 4647b31e1552SEric Sandeen "Journaled quota will not work"); 46480623543bSJan Kara } 46490623543bSJan Kara 46500623543bSJan Kara /* 46510623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 46520623543bSJan Kara * all updates to the file when we bypass pagecache... 46530623543bSJan Kara */ 46540390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 4655f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 46560623543bSJan Kara /* 46570623543bSJan Kara * We don't need to lock updates but journal_flush() could 46580623543bSJan Kara * otherwise be livelocked... 46590623543bSJan Kara */ 46600623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 46617ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 46620623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 4663f00c9e44SJan Kara if (err) 46647ffe1ea8SHidehiro Kawai return err; 46657ffe1ea8SHidehiro Kawai } 46660623543bSJan Kara 4667f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 4668ac27a0ecSDave Kleikamp } 4669ac27a0ecSDave Kleikamp 4670ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 4671ca0e05e4SDmitry Monakhov { 467221f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 467321f97697SJan Kara handle_t *handle; 467421f97697SJan Kara 467587009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 467687009d86SDmitry Monakhov * Caller already holds s_umount sem */ 467787009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 4678ca0e05e4SDmitry Monakhov sync_filesystem(sb); 4679ca0e05e4SDmitry Monakhov 46800b268590SAmir Goldstein if (!inode) 46810b268590SAmir Goldstein goto out; 46820b268590SAmir Goldstein 468321f97697SJan Kara /* Update modification times of quota files when userspace can 468421f97697SJan Kara * start looking at them */ 468521f97697SJan Kara handle = ext4_journal_start(inode, 1); 468621f97697SJan Kara if (IS_ERR(handle)) 468721f97697SJan Kara goto out; 468821f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 468921f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 469021f97697SJan Kara ext4_journal_stop(handle); 469121f97697SJan Kara 469221f97697SJan Kara out: 4693ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 4694ca0e05e4SDmitry Monakhov } 4695ca0e05e4SDmitry Monakhov 4696ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 4697ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 4698ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 4699ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 4700617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 4701ac27a0ecSDave Kleikamp size_t len, loff_t off) 4702ac27a0ecSDave Kleikamp { 4703ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4704725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4705ac27a0ecSDave Kleikamp int err = 0; 4706ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4707ac27a0ecSDave Kleikamp int tocopy; 4708ac27a0ecSDave Kleikamp size_t toread; 4709ac27a0ecSDave Kleikamp struct buffer_head *bh; 4710ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 4711ac27a0ecSDave Kleikamp 4712ac27a0ecSDave Kleikamp if (off > i_size) 4713ac27a0ecSDave Kleikamp return 0; 4714ac27a0ecSDave Kleikamp if (off+len > i_size) 4715ac27a0ecSDave Kleikamp len = i_size-off; 4716ac27a0ecSDave Kleikamp toread = len; 4717ac27a0ecSDave Kleikamp while (toread > 0) { 4718ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 4719ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 4720617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 4721ac27a0ecSDave Kleikamp if (err) 4722ac27a0ecSDave Kleikamp return err; 4723ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 4724ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 4725ac27a0ecSDave Kleikamp else 4726ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 4727ac27a0ecSDave Kleikamp brelse(bh); 4728ac27a0ecSDave Kleikamp offset = 0; 4729ac27a0ecSDave Kleikamp toread -= tocopy; 4730ac27a0ecSDave Kleikamp data += tocopy; 4731ac27a0ecSDave Kleikamp blk++; 4732ac27a0ecSDave Kleikamp } 4733ac27a0ecSDave Kleikamp return len; 4734ac27a0ecSDave Kleikamp } 4735ac27a0ecSDave Kleikamp 4736ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 4737ac27a0ecSDave Kleikamp * enough credits) */ 4738617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 4739ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 4740ac27a0ecSDave Kleikamp { 4741ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4742725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4743ac27a0ecSDave Kleikamp int err = 0; 4744ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4745ac27a0ecSDave Kleikamp struct buffer_head *bh; 4746ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 4747ac27a0ecSDave Kleikamp 47480390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 4749b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4750b31e1552SEric Sandeen " cancelled because transaction is not started", 47519c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 47529c3013e9SJan Kara return -EIO; 47539c3013e9SJan Kara } 475467eeb568SDmitry Monakhov /* 475567eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 475667eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 475767eeb568SDmitry Monakhov */ 475867eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 475967eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 476067eeb568SDmitry Monakhov " cancelled because not block aligned", 476167eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 476267eeb568SDmitry Monakhov return -EIO; 476367eeb568SDmitry Monakhov } 476467eeb568SDmitry Monakhov 4765ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 4766617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 4767ac27a0ecSDave Kleikamp if (!bh) 4768ac27a0ecSDave Kleikamp goto out; 4769617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 4770ac27a0ecSDave Kleikamp if (err) { 4771ac27a0ecSDave Kleikamp brelse(bh); 4772ac27a0ecSDave Kleikamp goto out; 4773ac27a0ecSDave Kleikamp } 4774ac27a0ecSDave Kleikamp lock_buffer(bh); 477567eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 4776ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 4777ac27a0ecSDave Kleikamp unlock_buffer(bh); 47780390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 4779ac27a0ecSDave Kleikamp brelse(bh); 4780ac27a0ecSDave Kleikamp out: 478167eeb568SDmitry Monakhov if (err) { 47824d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 4783ac27a0ecSDave Kleikamp return err; 47844d04e4fbSJan Kara } 478567eeb568SDmitry Monakhov if (inode->i_size < off + len) { 478667eeb568SDmitry Monakhov i_size_write(inode, off + len); 4787617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 4788617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 478921f97697SJan Kara } 4790ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 479167eeb568SDmitry Monakhov return len; 4792ac27a0ecSDave Kleikamp } 4793ac27a0ecSDave Kleikamp 4794ac27a0ecSDave Kleikamp #endif 4795ac27a0ecSDave Kleikamp 4796152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 4797152a0836SAl Viro const char *dev_name, void *data) 4798ac27a0ecSDave Kleikamp { 4799152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 4800ac27a0ecSDave Kleikamp } 4801ac27a0ecSDave Kleikamp 480237f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 480324b58424STheodore Ts'o static inline void register_as_ext2(void) 480424b58424STheodore Ts'o { 480524b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 480624b58424STheodore Ts'o if (err) 480724b58424STheodore Ts'o printk(KERN_WARNING 480824b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 480924b58424STheodore Ts'o } 481024b58424STheodore Ts'o 481124b58424STheodore Ts'o static inline void unregister_as_ext2(void) 481224b58424STheodore Ts'o { 481324b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 481424b58424STheodore Ts'o } 48152035e776STheodore Ts'o 48162035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 48172035e776STheodore Ts'o { 48182035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 48192035e776STheodore Ts'o return 0; 48202035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 48212035e776STheodore Ts'o return 1; 48222035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 48232035e776STheodore Ts'o return 0; 48242035e776STheodore Ts'o return 1; 48252035e776STheodore Ts'o } 482651b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 482724b58424STheodore Ts'o #else 482824b58424STheodore Ts'o static inline void register_as_ext2(void) { } 482924b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 48302035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 483124b58424STheodore Ts'o #endif 483224b58424STheodore Ts'o 483337f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 483424b58424STheodore Ts'o static inline void register_as_ext3(void) 483524b58424STheodore Ts'o { 483624b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 483724b58424STheodore Ts'o if (err) 483824b58424STheodore Ts'o printk(KERN_WARNING 483924b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 484024b58424STheodore Ts'o } 484124b58424STheodore Ts'o 484224b58424STheodore Ts'o static inline void unregister_as_ext3(void) 484324b58424STheodore Ts'o { 484424b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 484524b58424STheodore Ts'o } 48462035e776STheodore Ts'o 48472035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 48482035e776STheodore Ts'o { 48492035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 48502035e776STheodore Ts'o return 0; 48512035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 48522035e776STheodore Ts'o return 0; 48532035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 48542035e776STheodore Ts'o return 1; 48552035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 48562035e776STheodore Ts'o return 0; 48572035e776STheodore Ts'o return 1; 48582035e776STheodore Ts'o } 485951b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 486024b58424STheodore Ts'o #else 486124b58424STheodore Ts'o static inline void register_as_ext3(void) { } 486224b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 48632035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 486424b58424STheodore Ts'o #endif 486524b58424STheodore Ts'o 486603010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 4867ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 486803010a33STheodore Ts'o .name = "ext4", 4869152a0836SAl Viro .mount = ext4_mount, 4870ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 4871ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 4872ac27a0ecSDave Kleikamp }; 4873ac27a0ecSDave Kleikamp 48748f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 4875857ac889SLukas Czerner { 4876857ac889SLukas Czerner struct ext4_features *ef; 4877857ac889SLukas Czerner int ret = -ENOMEM; 4878857ac889SLukas Czerner 4879857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 4880857ac889SLukas Czerner if (!ef) 4881857ac889SLukas Czerner goto out; 4882857ac889SLukas Czerner 4883857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 4884857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 4885857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 4886857ac889SLukas Czerner "features"); 4887857ac889SLukas Czerner if (ret) { 4888857ac889SLukas Czerner kfree(ef); 4889857ac889SLukas Czerner goto out; 4890857ac889SLukas Czerner } 4891857ac889SLukas Czerner 4892857ac889SLukas Czerner ext4_feat = ef; 4893857ac889SLukas Czerner ret = 0; 4894857ac889SLukas Czerner out: 4895857ac889SLukas Czerner return ret; 4896857ac889SLukas Czerner } 4897857ac889SLukas Czerner 48988f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 48998f021222SLukas Czerner { 49008f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 49018f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 49028f021222SLukas Czerner kfree(ext4_feat); 49038f021222SLukas Czerner } 49048f021222SLukas Czerner 4905e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 4906e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 4907e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 4908e9e3bcecSEric Sandeen 49095dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 4910ac27a0ecSDave Kleikamp { 4911e9e3bcecSEric Sandeen int i, err; 4912c9de560dSAlex Tomas 491307c0c5d8SAl Viro ext4_li_info = NULL; 491407c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 491507c0c5d8SAl Viro 491612e9b892SDmitry Monakhov ext4_check_flag_values(); 4917e9e3bcecSEric Sandeen 4918e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 4919e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 4920e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 4921e9e3bcecSEric Sandeen } 4922e9e3bcecSEric Sandeen 49235dabfc78STheodore Ts'o err = ext4_init_pageio(); 49246fd058f7STheodore Ts'o if (err) 49256fd058f7STheodore Ts'o return err; 49265dabfc78STheodore Ts'o err = ext4_init_system_zone(); 4927bd2d0210STheodore Ts'o if (err) 4928d44651d0SFabrice Jouhaud goto out6; 49293197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 49303197ebdbSTheodore Ts'o if (!ext4_kset) 4931dd68314cSTheodore Ts'o goto out5; 4932d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 4933857ac889SLukas Czerner 4934857ac889SLukas Czerner err = ext4_init_feat_adverts(); 4935dd68314cSTheodore Ts'o if (err) 4936dd68314cSTheodore Ts'o goto out4; 4937857ac889SLukas Czerner 49385dabfc78STheodore Ts'o err = ext4_init_mballoc(); 4939ac27a0ecSDave Kleikamp if (err) 49406fd058f7STheodore Ts'o goto out3; 4941c9de560dSAlex Tomas 49425dabfc78STheodore Ts'o err = ext4_init_xattr(); 4943c9de560dSAlex Tomas if (err) 4944c9de560dSAlex Tomas goto out2; 4945ac27a0ecSDave Kleikamp err = init_inodecache(); 4946ac27a0ecSDave Kleikamp if (err) 4947ac27a0ecSDave Kleikamp goto out1; 494824b58424STheodore Ts'o register_as_ext3(); 49492035e776STheodore Ts'o register_as_ext2(); 495003010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 4951ac27a0ecSDave Kleikamp if (err) 4952ac27a0ecSDave Kleikamp goto out; 4953bfff6873SLukas Czerner 4954ac27a0ecSDave Kleikamp return 0; 4955ac27a0ecSDave Kleikamp out: 495624b58424STheodore Ts'o unregister_as_ext2(); 495724b58424STheodore Ts'o unregister_as_ext3(); 4958ac27a0ecSDave Kleikamp destroy_inodecache(); 4959ac27a0ecSDave Kleikamp out1: 49605dabfc78STheodore Ts'o ext4_exit_xattr(); 4961c9de560dSAlex Tomas out2: 49625dabfc78STheodore Ts'o ext4_exit_mballoc(); 49636fd058f7STheodore Ts'o out3: 49648f021222SLukas Czerner ext4_exit_feat_adverts(); 49656fd058f7STheodore Ts'o out4: 4966d44651d0SFabrice Jouhaud if (ext4_proc_root) 4967dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 4968dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 4969d44651d0SFabrice Jouhaud out5: 4970dd68314cSTheodore Ts'o ext4_exit_system_zone(); 4971d44651d0SFabrice Jouhaud out6: 49725dabfc78STheodore Ts'o ext4_exit_pageio(); 4973ac27a0ecSDave Kleikamp return err; 4974ac27a0ecSDave Kleikamp } 4975ac27a0ecSDave Kleikamp 49765dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 4977ac27a0ecSDave Kleikamp { 4978bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 497924b58424STheodore Ts'o unregister_as_ext2(); 498024b58424STheodore Ts'o unregister_as_ext3(); 498103010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 4982ac27a0ecSDave Kleikamp destroy_inodecache(); 49835dabfc78STheodore Ts'o ext4_exit_xattr(); 49845dabfc78STheodore Ts'o ext4_exit_mballoc(); 49858f021222SLukas Czerner ext4_exit_feat_adverts(); 49869f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 49873197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 49885dabfc78STheodore Ts'o ext4_exit_system_zone(); 49895dabfc78STheodore Ts'o ext4_exit_pageio(); 4990ac27a0ecSDave Kleikamp } 4991ac27a0ecSDave Kleikamp 4992ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 499383982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 4994ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 49955dabfc78STheodore Ts'o module_init(ext4_init_fs) 49965dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 4997