diff --git a/fs/buffer.c b/fs/buffer.c index 5234b15377c2..233e2983c5db 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -3031,11 +3031,11 @@ EXPORT_SYMBOL(block_write_full_page); sector_t generic_block_bmap(struct address_space *mapping, sector_t block, get_block_t *get_block) { - struct buffer_head tmp; struct inode *inode = mapping->host; - tmp.b_state = 0; - tmp.b_blocknr = 0; - tmp.b_size = i_blocksize(inode); + struct buffer_head tmp = { + .b_size = i_blocksize(inode), + }; + get_block(inode, block, &tmp, 0); return tmp.b_blocknr; } diff --git a/fs/crypto/policy.c b/fs/crypto/policy.c index 9914d51dff86..ce07a86200f3 100644 --- a/fs/crypto/policy.c +++ b/fs/crypto/policy.c @@ -256,6 +256,7 @@ int fscrypt_inherit_context(struct inode *parent, struct inode *child, memcpy(ctx.master_key_descriptor, ci->ci_master_key, FS_KEY_DESCRIPTOR_SIZE); get_random_bytes(ctx.nonce, FS_KEY_DERIVATION_NONCE_SIZE); + BUILD_BUG_ON(sizeof(ctx) != FSCRYPT_SET_CONTEXT_MAX_SIZE); res = parent->i_sb->s_cop->set_context(child, &ctx, sizeof(ctx), fs_data); if (res) diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h index 03f5ce1d3dbe..23ebb92484c6 100644 --- a/fs/ext2/ext2.h +++ b/fs/ext2/ext2.h @@ -113,7 +113,7 @@ struct ext2_sb_info { * of the mount options. */ spinlock_t s_lock; - struct mb_cache *s_mb_cache; + struct mb_cache *s_ea_block_cache; }; static inline spinlock_t * diff --git a/fs/ext2/super.c b/fs/ext2/super.c index 9c2028b50e5c..7b1bc9059863 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -147,9 +147,9 @@ static void ext2_put_super (struct super_block * sb) ext2_quota_off_umount(sb); - if (sbi->s_mb_cache) { - ext2_xattr_destroy_cache(sbi->s_mb_cache); - sbi->s_mb_cache = NULL; + if (sbi->s_ea_block_cache) { + ext2_xattr_destroy_cache(sbi->s_ea_block_cache); + sbi->s_ea_block_cache = NULL; } if (!(sb->s_flags & MS_RDONLY)) { struct ext2_super_block *es = sbi->s_es; @@ -1131,9 +1131,9 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) } #ifdef CONFIG_EXT2_FS_XATTR - sbi->s_mb_cache = ext2_xattr_create_cache(); - if (!sbi->s_mb_cache) { - ext2_msg(sb, KERN_ERR, "Failed to create an mb_cache"); + sbi->s_ea_block_cache = ext2_xattr_create_cache(); + if (!sbi->s_ea_block_cache) { + ext2_msg(sb, KERN_ERR, "Failed to create ea_block_cache"); goto failed_mount3; } #endif @@ -1182,8 +1182,8 @@ cantfind_ext2: sb->s_id); goto failed_mount; failed_mount3: - if (sbi->s_mb_cache) - ext2_xattr_destroy_cache(sbi->s_mb_cache); + if (sbi->s_ea_block_cache) + ext2_xattr_destroy_cache(sbi->s_ea_block_cache); percpu_counter_destroy(&sbi->s_freeblocks_counter); percpu_counter_destroy(&sbi->s_freeinodes_counter); percpu_counter_destroy(&sbi->s_dirs_counter); diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c index fbdb8f171893..1b9b1268d418 100644 --- a/fs/ext2/xattr.c +++ b/fs/ext2/xattr.c @@ -121,6 +121,8 @@ const struct xattr_handler *ext2_xattr_handlers[] = { NULL }; +#define EA_BLOCK_CACHE(inode) (EXT2_SB(inode->i_sb)->s_ea_block_cache) + static inline const struct xattr_handler * ext2_xattr_handler(int name_index) { @@ -150,7 +152,7 @@ ext2_xattr_get(struct inode *inode, int name_index, const char *name, size_t name_len, size; char *end; int error; - struct mb_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache; + struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode); ea_idebug(inode, "name=%d.%s, buffer=%p, buffer_size=%ld", name_index, name, buffer, (long)buffer_size); @@ -195,7 +197,7 @@ bad_block: ext2_error(inode->i_sb, "ext2_xattr_get", goto found; entry = next; } - if (ext2_xattr_cache_insert(ext2_mb_cache, bh)) + if (ext2_xattr_cache_insert(ea_block_cache, bh)) ea_idebug(inode, "cache insert failed"); error = -ENODATA; goto cleanup; @@ -208,7 +210,7 @@ found: le16_to_cpu(entry->e_value_offs) + size > inode->i_sb->s_blocksize) goto bad_block; - if (ext2_xattr_cache_insert(ext2_mb_cache, bh)) + if (ext2_xattr_cache_insert(ea_block_cache, bh)) ea_idebug(inode, "cache insert failed"); if (buffer) { error = -ERANGE; @@ -246,7 +248,7 @@ ext2_xattr_list(struct dentry *dentry, char *buffer, size_t buffer_size) char *end; size_t rest = buffer_size; int error; - struct mb_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache; + struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode); ea_idebug(inode, "buffer=%p, buffer_size=%ld", buffer, (long)buffer_size); @@ -281,7 +283,7 @@ bad_block: ext2_error(inode->i_sb, "ext2_xattr_list", goto bad_block; entry = next; } - if (ext2_xattr_cache_insert(ext2_mb_cache, bh)) + if (ext2_xattr_cache_insert(ea_block_cache, bh)) ea_idebug(inode, "cache insert failed"); /* list the attribute names */ @@ -493,8 +495,8 @@ bad_block: ext2_error(sb, "ext2_xattr_set", * This must happen under buffer lock for * ext2_xattr_set2() to reliably detect modified block */ - mb_cache_entry_delete_block(EXT2_SB(sb)->s_mb_cache, - hash, bh->b_blocknr); + mb_cache_entry_delete(EA_BLOCK_CACHE(inode), hash, + bh->b_blocknr); /* keep the buffer locked while modifying it. */ } else { @@ -627,7 +629,7 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh, struct super_block *sb = inode->i_sb; struct buffer_head *new_bh = NULL; int error; - struct mb_cache *ext2_mb_cache = EXT2_SB(sb)->s_mb_cache; + struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode); if (header) { new_bh = ext2_xattr_cache_find(inode, header); @@ -655,7 +657,7 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh, don't need to change the reference count. */ new_bh = old_bh; get_bh(new_bh); - ext2_xattr_cache_insert(ext2_mb_cache, new_bh); + ext2_xattr_cache_insert(ea_block_cache, new_bh); } else { /* We need to allocate a new block */ ext2_fsblk_t goal = ext2_group_first_block_no(sb, @@ -676,7 +678,7 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh, memcpy(new_bh->b_data, header, new_bh->b_size); set_buffer_uptodate(new_bh); unlock_buffer(new_bh); - ext2_xattr_cache_insert(ext2_mb_cache, new_bh); + ext2_xattr_cache_insert(ea_block_cache, new_bh); ext2_xattr_update_super_block(sb); } @@ -721,8 +723,8 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh, * This must happen under buffer lock for * ext2_xattr_set2() to reliably detect freed block */ - mb_cache_entry_delete_block(ext2_mb_cache, - hash, old_bh->b_blocknr); + mb_cache_entry_delete(ea_block_cache, hash, + old_bh->b_blocknr); /* Free the old block. */ ea_bdebug(old_bh, "freeing"); ext2_free_blocks(inode, old_bh->b_blocknr, 1); @@ -795,8 +797,8 @@ ext2_xattr_delete_inode(struct inode *inode) * This must happen under buffer lock for ext2_xattr_set2() to * reliably detect freed block */ - mb_cache_entry_delete_block(EXT2_SB(inode->i_sb)->s_mb_cache, - hash, bh->b_blocknr); + mb_cache_entry_delete(EA_BLOCK_CACHE(inode), hash, + bh->b_blocknr); ext2_free_blocks(inode, EXT2_I(inode)->i_file_acl, 1); get_bh(bh); bforget(bh); @@ -897,21 +899,21 @@ ext2_xattr_cache_find(struct inode *inode, struct ext2_xattr_header *header) { __u32 hash = le32_to_cpu(header->h_hash); struct mb_cache_entry *ce; - struct mb_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache; + struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode); if (!header->h_hash) return NULL; /* never share */ ea_idebug(inode, "looking for cached blocks [%x]", (int)hash); again: - ce = mb_cache_entry_find_first(ext2_mb_cache, hash); + ce = mb_cache_entry_find_first(ea_block_cache, hash); while (ce) { struct buffer_head *bh; - bh = sb_bread(inode->i_sb, ce->e_block); + bh = sb_bread(inode->i_sb, ce->e_value); if (!bh) { ext2_error(inode->i_sb, "ext2_xattr_cache_find", "inode %ld: block %ld read error", - inode->i_ino, (unsigned long) ce->e_block); + inode->i_ino, (unsigned long) ce->e_value); } else { lock_buffer(bh); /* @@ -924,27 +926,27 @@ again: * entry is still hashed is reliable. */ if (hlist_bl_unhashed(&ce->e_hash_list)) { - mb_cache_entry_put(ext2_mb_cache, ce); + mb_cache_entry_put(ea_block_cache, ce); unlock_buffer(bh); brelse(bh); goto again; } else if (le32_to_cpu(HDR(bh)->h_refcount) > EXT2_XATTR_REFCOUNT_MAX) { ea_idebug(inode, "block %ld refcount %d>%d", - (unsigned long) ce->e_block, + (unsigned long) ce->e_value, le32_to_cpu(HDR(bh)->h_refcount), EXT2_XATTR_REFCOUNT_MAX); } else if (!ext2_xattr_cmp(header, HDR(bh))) { ea_bdebug(bh, "b_count=%d", atomic_read(&(bh->b_count))); - mb_cache_entry_touch(ext2_mb_cache, ce); - mb_cache_entry_put(ext2_mb_cache, ce); + mb_cache_entry_touch(ea_block_cache, ce); + mb_cache_entry_put(ea_block_cache, ce); return bh; } unlock_buffer(bh); brelse(bh); } - ce = mb_cache_entry_find_next(ext2_mb_cache, ce); + ce = mb_cache_entry_find_next(ea_block_cache, ce); } return NULL; } diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c index 3ec0e46de95f..09441ae07a5b 100644 --- a/fs/ext4/acl.c +++ b/fs/ext4/acl.c @@ -183,7 +183,7 @@ ext4_get_acl(struct inode *inode, int type) */ static int __ext4_set_acl(handle_t *handle, struct inode *inode, int type, - struct posix_acl *acl) + struct posix_acl *acl, int xattr_flags) { int name_index; void *value = NULL; @@ -218,7 +218,7 @@ __ext4_set_acl(handle_t *handle, struct inode *inode, int type, } error = ext4_xattr_set_handle(handle, inode, name_index, "", - value, size, 0); + value, size, xattr_flags); kfree(value); if (!error) @@ -231,18 +231,23 @@ int ext4_set_acl(struct inode *inode, struct posix_acl *acl, int type) { handle_t *handle; - int error, retries = 0; + int error, credits, retries = 0; + size_t acl_size = acl ? ext4_acl_size(acl->a_count) : 0; error = dquot_initialize(inode); if (error) return error; retry: - handle = ext4_journal_start(inode, EXT4_HT_XATTR, - ext4_jbd2_credits_xattr(inode)); + error = ext4_xattr_set_credits(inode, acl_size, false /* is_create */, + &credits); + if (error) + return error; + + handle = ext4_journal_start(inode, EXT4_HT_XATTR, credits); if (IS_ERR(handle)) return PTR_ERR(handle); - error = __ext4_set_acl(handle, inode, type, acl); + error = __ext4_set_acl(handle, inode, type, acl, 0 /* xattr_flags */); ext4_journal_stop(handle); if (error == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) goto retry; @@ -267,13 +272,13 @@ ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir) if (default_acl) { error = __ext4_set_acl(handle, inode, ACL_TYPE_DEFAULT, - default_acl); + default_acl, XATTR_CREATE); posix_acl_release(default_acl); } if (acl) { if (!error) error = __ext4_set_acl(handle, inode, ACL_TYPE_ACCESS, - acl); + acl, XATTR_CREATE); posix_acl_release(acl); } return error; diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 32191548abed..9ebde0cd632e 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1114,6 +1114,7 @@ struct ext4_inode_info { /* * Mount flags set via mount options or defaults */ +#define EXT4_MOUNT_NO_MBCACHE 0x00001 /* Do not use mbcache */ #define EXT4_MOUNT_GRPID 0x00004 /* Create files with directory's group */ #define EXT4_MOUNT_DEBUG 0x00008 /* Some debugging messages */ #define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ @@ -1444,6 +1445,8 @@ struct ext4_sb_info { unsigned int *s_mb_maxs; unsigned int s_group_info_size; unsigned int s_mb_free_pending; + struct list_head s_freed_data_list; /* List of blocks to be freed + after commit completed */ /* tunables */ unsigned long s_stripe; @@ -1516,7 +1519,8 @@ struct ext4_sb_info { struct list_head s_es_list; /* List of inodes with reclaimable extents */ long s_es_nr_inode; struct ext4_es_stats s_es_stats; - struct mb_cache *s_mb_cache; + struct mb_cache *s_ea_block_cache; + struct mb_cache *s_ea_inode_cache; spinlock_t s_es_lock ____cacheline_aligned_in_smp; /* Ratelimit ext4 messages. */ @@ -1797,10 +1801,12 @@ EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, ENCRYPT) EXT4_FEATURE_INCOMPAT_EXTENTS| \ EXT4_FEATURE_INCOMPAT_64BIT| \ EXT4_FEATURE_INCOMPAT_FLEX_BG| \ + EXT4_FEATURE_INCOMPAT_EA_INODE| \ EXT4_FEATURE_INCOMPAT_MMP | \ EXT4_FEATURE_INCOMPAT_INLINE_DATA | \ EXT4_FEATURE_INCOMPAT_ENCRYPT | \ - EXT4_FEATURE_INCOMPAT_CSUM_SEED) + EXT4_FEATURE_INCOMPAT_CSUM_SEED | \ + EXT4_FEATURE_INCOMPAT_LARGEDIR) #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ @@ -2098,6 +2104,12 @@ static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset); } +static inline bool ext4_is_quota_file(struct inode *inode) +{ + return IS_NOQUOTA(inode) && + !(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL); +} + /* * This structure is stuffed into the struct file's private_data field * for directories. It is where we put information so that we can do @@ -2126,6 +2138,16 @@ ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no) */ #define ERR_BAD_DX_DIR (-(MAX_ERRNO - 1)) +/* htree levels for ext4 */ +#define EXT4_HTREE_LEVEL_COMPAT 2 +#define EXT4_HTREE_LEVEL 3 + +static inline int ext4_dir_htree_level(struct super_block *sb) +{ + return ext4_has_feature_largedir(sb) ? + EXT4_HTREE_LEVEL : EXT4_HTREE_LEVEL_COMPAT; +} + /* * Timeout and state flag for lazy initialization inode thread. */ @@ -2389,16 +2411,17 @@ extern int ext4fs_dirhash(const char *name, int len, struct /* ialloc.c */ extern struct inode *__ext4_new_inode(handle_t *, struct inode *, umode_t, const struct qstr *qstr, __u32 goal, - uid_t *owner, int handle_type, - unsigned int line_no, int nblocks); + uid_t *owner, __u32 i_flags, + int handle_type, unsigned int line_no, + int nblocks); -#define ext4_new_inode(handle, dir, mode, qstr, goal, owner) \ +#define ext4_new_inode(handle, dir, mode, qstr, goal, owner, i_flags) \ __ext4_new_inode((handle), (dir), (mode), (qstr), (goal), (owner), \ - 0, 0, 0) + i_flags, 0, 0, 0) #define ext4_new_inode_start_handle(dir, mode, qstr, goal, owner, \ type, nblocks) \ __ext4_new_inode(NULL, (dir), (mode), (qstr), (goal), (owner), \ - (type), __LINE__, (nblocks)) + 0, (type), __LINE__, (nblocks)) extern void ext4_free_inode(handle_t *, struct inode *); @@ -2433,6 +2456,7 @@ extern int ext4_mb_add_groupinfo(struct super_block *sb, extern int ext4_group_add_blocks(handle_t *handle, struct super_block *sb, ext4_fsblk_t block, unsigned long count); extern int ext4_trim_fs(struct super_block *, struct fstrim_range *); +extern void ext4_process_freed_data(struct super_block *sb, tid_t commit_tid); /* inode.c */ int ext4_inode_is_fast_symlink(struct inode *inode); @@ -2704,19 +2728,20 @@ extern void ext4_group_desc_csum_set(struct super_block *sb, __u32 group, extern int ext4_register_li_request(struct super_block *sb, ext4_group_t first_not_zeroed); -static inline int ext4_has_group_desc_csum(struct super_block *sb) -{ - return ext4_has_feature_gdt_csum(sb) || - EXT4_SB(sb)->s_chksum_driver != NULL; -} - static inline int ext4_has_metadata_csum(struct super_block *sb) { WARN_ON_ONCE(ext4_has_feature_metadata_csum(sb) && !EXT4_SB(sb)->s_chksum_driver); - return (EXT4_SB(sb)->s_chksum_driver != NULL); + return ext4_has_feature_metadata_csum(sb) && + (EXT4_SB(sb)->s_chksum_driver != NULL); } + +static inline int ext4_has_group_desc_csum(struct super_block *sb) +{ + return ext4_has_feature_gdt_csum(sb) || ext4_has_metadata_csum(sb); +} + static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es) { return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) | @@ -2756,13 +2781,15 @@ static inline void ext4_r_blocks_count_set(struct ext4_super_block *es, es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32); } -static inline loff_t ext4_isize(struct ext4_inode *raw_inode) +static inline loff_t ext4_isize(struct super_block *sb, + struct ext4_inode *raw_inode) { - if (S_ISREG(le16_to_cpu(raw_inode->i_mode))) + if (ext4_has_feature_largedir(sb) || + S_ISREG(le16_to_cpu(raw_inode->i_mode))) return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) | le32_to_cpu(raw_inode->i_size_lo); - else - return (loff_t) le32_to_cpu(raw_inode->i_size_lo); + + return (loff_t) le32_to_cpu(raw_inode->i_size_lo); } static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size) diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h index f97611171023..dabad1bc8617 100644 --- a/fs/ext4/ext4_jbd2.h +++ b/fs/ext4/ext4_jbd2.h @@ -77,7 +77,14 @@ #define EXT4_RESERVE_TRANS_BLOCKS 12U -#define EXT4_INDEX_EXTRA_TRANS_BLOCKS 8 +/* + * Number of credits needed if we need to insert an entry into a + * directory. For each new index block, we need 4 blocks (old index + * block, new index block, bitmap block, bg summary). For normal + * htree directories there are 2 levels; if the largedir feature + * enabled it's 3 levels. + */ +#define EXT4_INDEX_EXTRA_TRANS_BLOCKS 12U #ifdef CONFIG_QUOTA /* Amount of blocks needed for quota update - we know that the structure was @@ -104,20 +111,6 @@ #define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb)) #define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (EXT4_MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb)) -static inline int ext4_jbd2_credits_xattr(struct inode *inode) -{ - int credits = EXT4_DATA_TRANS_BLOCKS(inode->i_sb); - - /* - * In case of inline data, we may push out the data to a block, - * so we need to reserve credits for this eventuality - */ - if (ext4_has_inline_data(inode)) - credits += ext4_writepage_trans_blocks(inode) + 1; - return credits; -} - - /* * Ext4 handle operation types -- for logging purposes */ diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 3e36508610b7..e0a8425ff74d 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -2488,7 +2488,8 @@ int ext4_ext_index_trans_blocks(struct inode *inode, int extents) static inline int get_default_free_blocks_flags(struct inode *inode) { - if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) + if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode) || + ext4_test_inode_flag(inode, EXT4_INODE_EA_INODE)) return EXT4_FREE_BLOCKS_METADATA | EXT4_FREE_BLOCKS_FORGET; else if (ext4_should_journal_data(inode)) return EXT4_FREE_BLOCKS_FORGET; diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 58e2eeaa0bc4..58294c9a7e1d 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -364,13 +364,6 @@ static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma) if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) return -EIO; - if (ext4_encrypted_inode(inode)) { - int err = fscrypt_get_encryption_info(inode); - if (err) - return 0; - if (!fscrypt_has_encryption_key(inode)) - return -ENOKEY; - } file_accessed(file); if (IS_DAX(file_inode(file))) { vma->vm_ops = &ext4_dax_vm_ops; diff --git a/fs/ext4/fsmap.c b/fs/ext4/fsmap.c index b19436098837..7ec340898598 100644 --- a/fs/ext4/fsmap.c +++ b/fs/ext4/fsmap.c @@ -480,6 +480,7 @@ static int ext4_getfsmap_datadev(struct super_block *sb, struct ext4_sb_info *sbi = EXT4_SB(sb); ext4_fsblk_t start_fsb; ext4_fsblk_t end_fsb; + ext4_fsblk_t bofs; ext4_fsblk_t eofs; ext4_group_t start_ag; ext4_group_t end_ag; @@ -487,9 +488,12 @@ static int ext4_getfsmap_datadev(struct super_block *sb, ext4_grpblk_t last_cluster; int error = 0; + bofs = le32_to_cpu(sbi->s_es->s_first_data_block); eofs = ext4_blocks_count(sbi->s_es); if (keys[0].fmr_physical >= eofs) return 0; + else if (keys[0].fmr_physical < bofs) + keys[0].fmr_physical = bofs; if (keys[1].fmr_physical >= eofs) keys[1].fmr_physical = eofs - 1; start_fsb = keys[0].fmr_physical; diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index 98ac2f1f23b3..507bfb3344d4 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -294,7 +294,6 @@ void ext4_free_inode(handle_t *handle, struct inode *inode) * as writing the quota to disk may need the lock as well. */ dquot_initialize(inode); - ext4_xattr_delete_inode(handle, inode); dquot_free_inode(inode); dquot_drop(inode); @@ -743,8 +742,9 @@ out: */ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir, umode_t mode, const struct qstr *qstr, - __u32 goal, uid_t *owner, int handle_type, - unsigned int line_no, int nblocks) + __u32 goal, uid_t *owner, __u32 i_flags, + int handle_type, unsigned int line_no, + int nblocks) { struct super_block *sb; struct buffer_head *inode_bitmap_bh = NULL; @@ -766,30 +766,69 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir, if (!dir || !dir->i_nlink) return ERR_PTR(-EPERM); - if (unlikely(ext4_forced_shutdown(EXT4_SB(dir->i_sb)))) + sb = dir->i_sb; + sbi = EXT4_SB(sb); + + if (unlikely(ext4_forced_shutdown(sbi))) return ERR_PTR(-EIO); - if ((ext4_encrypted_inode(dir) || - DUMMY_ENCRYPTION_ENABLED(EXT4_SB(dir->i_sb))) && - (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))) { + if ((ext4_encrypted_inode(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) && + (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) && + !(i_flags & EXT4_EA_INODE_FL)) { err = fscrypt_get_encryption_info(dir); if (err) return ERR_PTR(err); if (!fscrypt_has_encryption_key(dir)) return ERR_PTR(-ENOKEY); - if (!handle) - nblocks += EXT4_DATA_TRANS_BLOCKS(dir->i_sb); encrypt = 1; } - sb = dir->i_sb; + if (!handle && sbi->s_journal && !(i_flags & EXT4_EA_INODE_FL)) { +#ifdef CONFIG_EXT4_FS_POSIX_ACL + struct posix_acl *p = get_acl(dir, ACL_TYPE_DEFAULT); + + if (p) { + int acl_size = p->a_count * sizeof(ext4_acl_entry); + + nblocks += (S_ISDIR(mode) ? 2 : 1) * + __ext4_xattr_set_credits(sb, NULL /* inode */, + NULL /* block_bh */, acl_size, + true /* is_create */); + posix_acl_release(p); + } +#endif + +#ifdef CONFIG_SECURITY + { + int num_security_xattrs = 1; + +#ifdef CONFIG_INTEGRITY + num_security_xattrs++; +#endif + /* + * We assume that security xattrs are never + * more than 1k. In practice they are under + * 128 bytes. + */ + nblocks += num_security_xattrs * + __ext4_xattr_set_credits(sb, NULL /* inode */, + NULL /* block_bh */, 1024, + true /* is_create */); + } +#endif + if (encrypt) + nblocks += __ext4_xattr_set_credits(sb, + NULL /* inode */, NULL /* block_bh */, + FSCRYPT_SET_CONTEXT_MAX_SIZE, + true /* is_create */); + } + ngroups = ext4_get_groups_count(sb); trace_ext4_request_inode(dir, mode); inode = new_inode(sb); if (!inode) return ERR_PTR(-ENOMEM); ei = EXT4_I(inode); - sbi = EXT4_SB(sb); /* * Initialize owners and quota early so that we don't have to account @@ -1053,6 +1092,7 @@ got: /* Don't inherit extent flag from directory, amongst others. */ ei->i_flags = ext4_mask_flags(mode, EXT4_I(dir)->i_flags & EXT4_FL_INHERITED); + ei->i_flags |= i_flags; ei->i_file_acl = 0; ei->i_dtime = 0; ei->i_block_group = group; @@ -1109,13 +1149,15 @@ got: goto fail_free_drop; } - err = ext4_init_acl(handle, inode, dir); - if (err) - goto fail_free_drop; + if (!(ei->i_flags & EXT4_EA_INODE_FL)) { + err = ext4_init_acl(handle, inode, dir); + if (err) + goto fail_free_drop; - err = ext4_init_security(handle, inode, dir, qstr); - if (err) - goto fail_free_drop; + err = ext4_init_security(handle, inode, dir, qstr); + if (err) + goto fail_free_drop; + } if (ext4_has_feature_extents(sb)) { /* set extent flag only for directory, file and normal symlink*/ diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c index bc15c2c17633..7ffa290cbb8e 100644 --- a/fs/ext4/indirect.c +++ b/fs/ext4/indirect.c @@ -829,7 +829,8 @@ static int ext4_clear_blocks(handle_t *handle, struct inode *inode, int flags = EXT4_FREE_BLOCKS_VALIDATED; int err; - if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) + if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode) || + ext4_test_inode_flag(inode, EXT4_INODE_EA_INODE)) flags |= EXT4_FREE_BLOCKS_FORGET | EXT4_FREE_BLOCKS_METADATA; else if (ext4_should_journal_data(inode)) flags |= EXT4_FREE_BLOCKS_FORGET; diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c index 8d141c0c8ff9..28c5c3abddb3 100644 --- a/fs/ext4/inline.c +++ b/fs/ext4/inline.c @@ -61,7 +61,7 @@ static int get_max_inline_xattr_value_size(struct inode *inode, /* Compute min_offs. */ for (; !IS_LAST_ENTRY(entry); entry = EXT4_XATTR_NEXT(entry)) { - if (!entry->e_value_block && entry->e_value_size) { + if (!entry->e_value_inum && entry->e_value_size) { size_t offs = le16_to_cpu(entry->e_value_offs); if (offs < min_offs) min_offs = offs; diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 5cf82d03968c..3c600f02673f 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -144,16 +144,12 @@ static int ext4_meta_trans_blocks(struct inode *inode, int lblocks, /* * Test whether an inode is a fast symlink. + * A fast symlink has its symlink data stored in ext4_inode_info->i_data. */ int ext4_inode_is_fast_symlink(struct inode *inode) { - int ea_blocks = EXT4_I(inode)->i_file_acl ? - EXT4_CLUSTER_SIZE(inode->i_sb) >> 9 : 0; - - if (ext4_has_inline_data(inode)) - return 0; - - return (S_ISLNK(inode->i_mode) && inode->i_blocks - ea_blocks == 0); + return S_ISLNK(inode->i_mode) && inode->i_size && + (inode->i_size < EXT4_N_BLOCKS * 4); } /* @@ -189,6 +185,8 @@ void ext4_evict_inode(struct inode *inode) { handle_t *handle; int err; + int extra_credits = 3; + struct ext4_xattr_inode_array *ea_inode_array = NULL; trace_ext4_evict_inode(inode); @@ -213,7 +211,8 @@ void ext4_evict_inode(struct inode *inode) */ if (inode->i_ino != EXT4_JOURNAL_INO && ext4_should_journal_data(inode) && - (S_ISLNK(inode->i_mode) || S_ISREG(inode->i_mode))) { + (S_ISLNK(inode->i_mode) || S_ISREG(inode->i_mode)) && + inode->i_data.nrpages) { journal_t *journal = EXT4_SB(inode->i_sb)->s_journal; tid_t commit_tid = EXT4_I(inode)->i_datasync_tid; @@ -238,8 +237,12 @@ void ext4_evict_inode(struct inode *inode) * protection against it */ sb_start_intwrite(inode->i_sb); + + if (!IS_NOQUOTA(inode)) + extra_credits += EXT4_MAXQUOTAS_DEL_BLOCKS(inode->i_sb); + handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE, - ext4_blocks_for_truncate(inode)+3); + ext4_blocks_for_truncate(inode)+extra_credits); if (IS_ERR(handle)) { ext4_std_error(inode->i_sb, PTR_ERR(handle)); /* @@ -254,6 +257,16 @@ void ext4_evict_inode(struct inode *inode) if (IS_SYNC(inode)) ext4_handle_sync(handle); + + /* + * Set inode->i_size to 0 before calling ext4_truncate(). We need + * special handling of symlinks here because i_size is used to + * determine whether ext4_inode_info->i_data contains symlink data or + * block mappings. Setting i_size to 0 will remove its fast symlink + * status. Erase i_data so that it becomes a valid empty block map. + */ + if (ext4_inode_is_fast_symlink(inode)) + memset(EXT4_I(inode)->i_data, 0, sizeof(EXT4_I(inode)->i_data)); inode->i_size = 0; err = ext4_mark_inode_dirty(handle, inode); if (err) { @@ -271,25 +284,17 @@ void ext4_evict_inode(struct inode *inode) } } - /* - * ext4_ext_truncate() doesn't reserve any slop when it - * restarts journal transactions; therefore there may not be - * enough credits left in the handle to remove the inode from - * the orphan list and set the dtime field. - */ - if (!ext4_handle_has_enough_credits(handle, 3)) { - err = ext4_journal_extend(handle, 3); - if (err > 0) - err = ext4_journal_restart(handle, 3); - if (err != 0) { - ext4_warning(inode->i_sb, - "couldn't extend journal (err %d)", err); - stop_handle: - ext4_journal_stop(handle); - ext4_orphan_del(NULL, inode); - sb_end_intwrite(inode->i_sb); - goto no_delete; - } + /* Remove xattr references. */ + err = ext4_xattr_delete_inode(handle, inode, &ea_inode_array, + extra_credits); + if (err) { + ext4_warning(inode->i_sb, "xattr delete (err %d)", err); +stop_handle: + ext4_journal_stop(handle); + ext4_orphan_del(NULL, inode); + sb_end_intwrite(inode->i_sb); + ext4_xattr_inode_array_free(ea_inode_array); + goto no_delete; } /* @@ -317,6 +322,7 @@ void ext4_evict_inode(struct inode *inode) ext4_free_inode(handle, inode); ext4_journal_stop(handle); sb_end_intwrite(inode->i_sb); + ext4_xattr_inode_array_free(ea_inode_array); return; no_delete: ext4_clear_inode(inode); /* We must guarantee clearing of inode... */ @@ -710,7 +716,7 @@ out_sem: if (map->m_flags & EXT4_MAP_NEW && !(map->m_flags & EXT4_MAP_UNWRITTEN) && !(flags & EXT4_GET_BLOCKS_ZERO) && - !IS_NOQUOTA(inode) && + !ext4_is_quota_file(inode) && ext4_should_order_data(inode)) { if (flags & EXT4_GET_BLOCKS_IO_SUBMIT) ret = ext4_jbd2_inode_add_wait(handle, inode); @@ -4712,7 +4718,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino) if (ext4_has_feature_64bit(sb)) ei->i_file_acl |= ((__u64)le16_to_cpu(raw_inode->i_file_acl_high)) << 32; - inode->i_size = ext4_isize(raw_inode); + inode->i_size = ext4_isize(sb, raw_inode); if ((size = i_size_read(inode)) < 0) { EXT4_ERROR_INODE(inode, "bad i_size value: %lld", size); ret = -EFSCORRUPTED; @@ -4846,6 +4852,15 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino) } brelse(iloc.bh); ext4_set_inode_flags(inode); + + if (ei->i_flags & EXT4_EA_INODE_FL) { + ext4_xattr_inode_set_class(inode); + + inode_lock(inode); + inode->i_flags |= S_NOQUOTA; + inode_unlock(inode); + } + unlock_new_inode(inode); return inode; @@ -5037,7 +5052,7 @@ static int ext4_do_update_inode(handle_t *handle, raw_inode->i_file_acl_high = cpu_to_le16(ei->i_file_acl >> 32); raw_inode->i_file_acl_lo = cpu_to_le32(ei->i_file_acl); - if (ei->i_disksize != ext4_isize(raw_inode)) { + if (ei->i_disksize != ext4_isize(inode->i_sb, raw_inode)) { ext4_isize_set(raw_inode, ei->i_disksize); need_datasync = 1; } @@ -5287,7 +5302,14 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) error = PTR_ERR(handle); goto err_out; } + + /* dquot_transfer() calls back ext4_get_inode_usage() which + * counts xattr inode references. + */ + down_read(&EXT4_I(inode)->xattr_sem); error = dquot_transfer(inode, attr); + up_read(&EXT4_I(inode)->xattr_sem); + if (error) { ext4_journal_stop(handle); return error; @@ -5307,6 +5329,14 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) loff_t oldsize = inode->i_size; int shrink = (attr->ia_size <= inode->i_size); + if (ext4_encrypted_inode(inode)) { + error = fscrypt_get_encryption_info(inode); + if (error) + return error; + if (!fscrypt_has_encryption_key(inode)) + return -ENOKEY; + } + if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) { struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index 0c21e22acd74..42b3a73143cf 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -218,7 +218,7 @@ static int ext4_ioctl_setflags(struct inode *inode, unsigned int jflag; /* Is it quota file? Do not allow user to mess with it */ - if (IS_NOQUOTA(inode)) + if (ext4_is_quota_file(inode)) goto flags_out; oldflags = ei->i_flags; @@ -342,7 +342,7 @@ static int ext4_ioctl_setproject(struct file *filp, __u32 projid) err = -EPERM; inode_lock(inode); /* Is it quota file? Do not allow user to mess with it */ - if (IS_NOQUOTA(inode)) + if (ext4_is_quota_file(inode)) goto out_unlock; err = ext4_get_inode_loc(inode, &iloc); @@ -373,7 +373,13 @@ static int ext4_ioctl_setproject(struct file *filp, __u32 projid) transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); if (!IS_ERR(transfer_to[PRJQUOTA])) { + + /* __dquot_transfer() calls back ext4_get_inode_usage() which + * counts xattr inode references. + */ + down_read(&EXT4_I(inode)->xattr_sem); err = __dquot_transfer(inode, transfer_to); + up_read(&EXT4_I(inode)->xattr_sem); dqput(transfer_to[PRJQUOTA]); if (err) goto out_dirty; diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index b7928cddd539..581e357e8406 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -367,8 +367,6 @@ static void ext4_mb_generate_from_pa(struct super_block *sb, void *bitmap, ext4_group_t group); static void ext4_mb_generate_from_freelist(struct super_block *sb, void *bitmap, ext4_group_t group); -static void ext4_free_data_callback(struct super_block *sb, - struct ext4_journal_cb_entry *jce, int rc); static inline void *mb_correct_addr_and_bit(int *bit, void *addr) { @@ -2639,6 +2637,7 @@ int ext4_mb_init(struct super_block *sb) spin_lock_init(&sbi->s_md_lock); spin_lock_init(&sbi->s_bal_lock); sbi->s_mb_free_pending = 0; + INIT_LIST_HEAD(&sbi->s_freed_data_list); sbi->s_mb_max_to_scan = MB_DEFAULT_MAX_TO_SCAN; sbi->s_mb_min_to_scan = MB_DEFAULT_MIN_TO_SCAN; @@ -2782,7 +2781,8 @@ int ext4_mb_release(struct super_block *sb) } static inline int ext4_issue_discard(struct super_block *sb, - ext4_group_t block_group, ext4_grpblk_t cluster, int count) + ext4_group_t block_group, ext4_grpblk_t cluster, int count, + struct bio **biop) { ext4_fsblk_t discard_block; @@ -2791,18 +2791,18 @@ static inline int ext4_issue_discard(struct super_block *sb, count = EXT4_C2B(EXT4_SB(sb), count); trace_ext4_discard_blocks(sb, (unsigned long long) discard_block, count); - return sb_issue_discard(sb, discard_block, count, GFP_NOFS, 0); + if (biop) { + return __blkdev_issue_discard(sb->s_bdev, + (sector_t)discard_block << (sb->s_blocksize_bits - 9), + (sector_t)count << (sb->s_blocksize_bits - 9), + GFP_NOFS, 0, biop); + } else + return sb_issue_discard(sb, discard_block, count, GFP_NOFS, 0); } -/* - * This function is called by the jbd2 layer once the commit has finished, - * so we know we can free the blocks that were released with that commit. - */ -static void ext4_free_data_callback(struct super_block *sb, - struct ext4_journal_cb_entry *jce, - int rc) +static void ext4_free_data_in_buddy(struct super_block *sb, + struct ext4_free_data *entry) { - struct ext4_free_data *entry = (struct ext4_free_data *)jce; struct ext4_buddy e4b; struct ext4_group_info *db; int err, count = 0, count2 = 0; @@ -2810,18 +2810,6 @@ static void ext4_free_data_callback(struct super_block *sb, mb_debug(1, "gonna free %u blocks in group %u (0x%p):", entry->efd_count, entry->efd_group, entry); - if (test_opt(sb, DISCARD)) { - err = ext4_issue_discard(sb, entry->efd_group, - entry->efd_start_cluster, - entry->efd_count); - if (err && err != -EOPNOTSUPP) - ext4_msg(sb, KERN_WARNING, "discard request in" - " group:%d block:%d count:%d failed" - " with %d", entry->efd_group, - entry->efd_start_cluster, - entry->efd_count, err); - } - err = ext4_mb_load_buddy(sb, entry->efd_group, &e4b); /* we expect to find existing buddy because it's pinned */ BUG_ON(err != 0); @@ -2862,6 +2850,56 @@ static void ext4_free_data_callback(struct super_block *sb, mb_debug(1, "freed %u blocks in %u structures\n", count, count2); } +/* + * This function is called by the jbd2 layer once the commit has finished, + * so we know we can free the blocks that were released with that commit. + */ +void ext4_process_freed_data(struct super_block *sb, tid_t commit_tid) +{ + struct ext4_sb_info *sbi = EXT4_SB(sb); + struct ext4_free_data *entry, *tmp; + struct bio *discard_bio = NULL; + struct list_head freed_data_list; + struct list_head *cut_pos = NULL; + int err; + + INIT_LIST_HEAD(&freed_data_list); + + spin_lock(&sbi->s_md_lock); + list_for_each_entry(entry, &sbi->s_freed_data_list, efd_list) { + if (entry->efd_tid != commit_tid) + break; + cut_pos = &entry->efd_list; + } + if (cut_pos) + list_cut_position(&freed_data_list, &sbi->s_freed_data_list, + cut_pos); + spin_unlock(&sbi->s_md_lock); + + if (test_opt(sb, DISCARD)) { + list_for_each_entry(entry, &freed_data_list, efd_list) { + err = ext4_issue_discard(sb, entry->efd_group, + entry->efd_start_cluster, + entry->efd_count, + &discard_bio); + if (err && err != -EOPNOTSUPP) { + ext4_msg(sb, KERN_WARNING, "discard request in" + " group:%d block:%d count:%d failed" + " with %d", entry->efd_group, + entry->efd_start_cluster, + entry->efd_count, err); + } else if (err == -EOPNOTSUPP) + break; + } + + if (discard_bio) + submit_bio_wait(discard_bio); + } + + list_for_each_entry_safe(entry, tmp, &freed_data_list, efd_list) + ext4_free_data_in_buddy(sb, entry); +} + int __init ext4_init_mballoc(void) { ext4_pspace_cachep = KMEM_CACHE(ext4_prealloc_space, @@ -3529,7 +3567,7 @@ void ext4_mb_generate_from_pa(struct super_block *sb, void *bitmap, ext4_set_bits(bitmap, start, len); preallocated += len; } - mb_debug(1, "prellocated %u for group %u\n", preallocated, group); + mb_debug(1, "preallocated %u for group %u\n", preallocated, group); } static void ext4_mb_pa_callback(struct rcu_head *head) @@ -4464,7 +4502,7 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle, trace_ext4_request_blocks(ar); /* Allow to use superuser reservation for quota file */ - if (IS_NOQUOTA(ar->inode)) + if (ext4_is_quota_file(ar->inode)) ar->flags |= EXT4_MB_USE_ROOT_BLOCKS; if ((ar->flags & EXT4_MB_DELALLOC_RESERVED) == 0) { @@ -4583,14 +4621,28 @@ out: * are contiguous, AND the extents were freed by the same transaction, * AND the blocks are associated with the same group. */ -static int can_merge(struct ext4_free_data *entry1, - struct ext4_free_data *entry2) +static void ext4_try_merge_freed_extent(struct ext4_sb_info *sbi, + struct ext4_free_data *entry, + struct ext4_free_data *new_entry, + struct rb_root *entry_rb_root) { - if ((entry1->efd_tid == entry2->efd_tid) && - (entry1->efd_group == entry2->efd_group) && - ((entry1->efd_start_cluster + entry1->efd_count) == entry2->efd_start_cluster)) - return 1; - return 0; + if ((entry->efd_tid != new_entry->efd_tid) || + (entry->efd_group != new_entry->efd_group)) + return; + if (entry->efd_start_cluster + entry->efd_count == + new_entry->efd_start_cluster) { + new_entry->efd_start_cluster = entry->efd_start_cluster; + new_entry->efd_count += entry->efd_count; + } else if (new_entry->efd_start_cluster + new_entry->efd_count == + entry->efd_start_cluster) { + new_entry->efd_count += entry->efd_count; + } else + return; + spin_lock(&sbi->s_md_lock); + list_del(&entry->efd_list); + spin_unlock(&sbi->s_md_lock); + rb_erase(&entry->efd_node, entry_rb_root); + kmem_cache_free(ext4_free_data_cachep, entry); } static noinline_for_stack int @@ -4646,29 +4698,19 @@ ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b, node = rb_prev(new_node); if (node) { entry = rb_entry(node, struct ext4_free_data, efd_node); - if (can_merge(entry, new_entry) && - ext4_journal_callback_try_del(handle, &entry->efd_jce)) { - new_entry->efd_start_cluster = entry->efd_start_cluster; - new_entry->efd_count += entry->efd_count; - rb_erase(node, &(db->bb_free_root)); - kmem_cache_free(ext4_free_data_cachep, entry); - } + ext4_try_merge_freed_extent(sbi, entry, new_entry, + &(db->bb_free_root)); } node = rb_next(new_node); if (node) { entry = rb_entry(node, struct ext4_free_data, efd_node); - if (can_merge(new_entry, entry) && - ext4_journal_callback_try_del(handle, &entry->efd_jce)) { - new_entry->efd_count += entry->efd_count; - rb_erase(node, &(db->bb_free_root)); - kmem_cache_free(ext4_free_data_cachep, entry); - } + ext4_try_merge_freed_extent(sbi, entry, new_entry, + &(db->bb_free_root)); } - /* Add the extent to transaction's private list */ - new_entry->efd_jce.jce_func = ext4_free_data_callback; + spin_lock(&sbi->s_md_lock); - _ext4_journal_callback_add(handle, &new_entry->efd_jce); + list_add_tail(&new_entry->efd_list, &sbi->s_freed_data_list); sbi->s_mb_free_pending += clusters; spin_unlock(&sbi->s_md_lock); return 0; @@ -4871,7 +4913,8 @@ do_more: * them with group lock_held */ if (test_opt(sb, DISCARD)) { - err = ext4_issue_discard(sb, block_group, bit, count); + err = ext4_issue_discard(sb, block_group, bit, count, + NULL); if (err && err != -EOPNOTSUPP) ext4_msg(sb, KERN_WARNING, "discard request in" " group:%d block:%d count:%lu failed" @@ -5094,7 +5137,7 @@ __acquires(bitlock) */ mb_mark_used(e4b, &ex); ext4_unlock_group(sb, group); - ret = ext4_issue_discard(sb, group, start, count); + ret = ext4_issue_discard(sb, group, start, count, NULL); ext4_lock_group(sb, group); mb_free_blocks(NULL, e4b, start, ex.fe_len); return ret; diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h index 2bed62084a8c..009300ee1561 100644 --- a/fs/ext4/mballoc.h +++ b/fs/ext4/mballoc.h @@ -78,10 +78,8 @@ do { \ struct ext4_free_data { - /* MUST be the first member */ - struct ext4_journal_cb_entry efd_jce; - - /* ext4_free_data private data starts from here */ + /* this links the free block information from sb_info */ + struct list_head efd_list; /* this links the free block information from group_info */ struct rb_node efd_node; diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c index 364ea4d4a943..cf5181b62df1 100644 --- a/fs/ext4/migrate.c +++ b/fs/ext4/migrate.c @@ -475,7 +475,7 @@ int ext4_ext_migrate(struct inode *inode) owner[0] = i_uid_read(inode); owner[1] = i_gid_read(inode); tmp_inode = ext4_new_inode(handle, d_inode(inode->i_sb->s_root), - S_IFREG, NULL, goal, owner); + S_IFREG, NULL, goal, owner, 0); if (IS_ERR(tmp_inode)) { retval = PTR_ERR(tmp_inode); ext4_journal_stop(handle); diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c index c992ef2c2f94..9bb36909ec92 100644 --- a/fs/ext4/move_extent.c +++ b/fs/ext4/move_extent.c @@ -484,7 +484,7 @@ mext_check_arguments(struct inode *orig_inode, return -EBUSY; } - if (IS_NOQUOTA(orig_inode) || IS_NOQUOTA(donor_inode)) { + if (ext4_is_quota_file(orig_inode) && ext4_is_quota_file(donor_inode)) { ext4_debug("ext4 move extent: The argument files should " "not be quota files [ino:orig %lu, donor %lu]\n", orig_inode->i_ino, donor_inode->i_ino); diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 404256caf9cf..13f0cadb1238 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -513,7 +513,7 @@ ext4_next_entry(struct ext4_dir_entry_2 *p, unsigned long blocksize) static inline ext4_lblk_t dx_get_block(struct dx_entry *entry) { - return le32_to_cpu(entry->block) & 0x00ffffff; + return le32_to_cpu(entry->block) & 0x0fffffff; } static inline void dx_set_block(struct dx_entry *entry, ext4_lblk_t value) @@ -739,6 +739,7 @@ dx_probe(struct ext4_filename *fname, struct inode *dir, struct dx_frame *ret_err = ERR_PTR(ERR_BAD_DX_DIR); u32 hash; + memset(frame_in, 0, EXT4_HTREE_LEVEL * sizeof(frame_in[0])); frame->bh = ext4_read_dirblock(dir, 0, INDEX); if (IS_ERR(frame->bh)) return (struct dx_frame *) frame->bh; @@ -768,9 +769,15 @@ dx_probe(struct ext4_filename *fname, struct inode *dir, } indirect = root->info.indirect_levels; - if (indirect > 1) { - ext4_warning_inode(dir, "Unimplemented hash depth: %#06x", - root->info.indirect_levels); + if (indirect >= ext4_dir_htree_level(dir->i_sb)) { + ext4_warning(dir->i_sb, + "Directory (ino: %lu) htree depth %#06x exceed" + "supported value", dir->i_ino, + ext4_dir_htree_level(dir->i_sb)); + if (ext4_dir_htree_level(dir->i_sb) < EXT4_HTREE_LEVEL) { + ext4_warning(dir->i_sb, "Enable large directory " + "feature to access it"); + } goto fail; } @@ -859,12 +866,19 @@ fail: static void dx_release(struct dx_frame *frames) { + struct dx_root_info *info; + int i; + if (frames[0].bh == NULL) return; - if (((struct dx_root *)frames[0].bh->b_data)->info.indirect_levels) - brelse(frames[1].bh); - brelse(frames[0].bh); + info = &((struct dx_root *)frames[0].bh->b_data)->info; + for (i = 0; i <= info->indirect_levels; i++) { + if (frames[i].bh == NULL) + break; + brelse(frames[i].bh); + frames[i].bh = NULL; + } } /* @@ -1050,7 +1064,7 @@ int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash, { struct dx_hash_info hinfo; struct ext4_dir_entry_2 *de; - struct dx_frame frames[2], *frame; + struct dx_frame frames[EXT4_HTREE_LEVEL], *frame; struct inode *dir; ext4_lblk_t block; int count = 0; @@ -1428,11 +1442,11 @@ restart: goto next; wait_on_buffer(bh); if (!buffer_uptodate(bh)) { - /* read error, skip block & hope for the best */ EXT4_ERROR_INODE(dir, "reading directory lblock %lu", (unsigned long) block); brelse(bh); - goto next; + ret = ERR_PTR(-EIO); + goto cleanup_and_exit; } if (!buffer_verified(bh) && !is_dx_internal_node(dir, block, @@ -1442,7 +1456,8 @@ restart: EXT4_ERROR_INODE(dir, "checksumming directory " "block %lu", (unsigned long)block); brelse(bh); - goto next; + ret = ERR_PTR(-EFSBADCRC); + goto cleanup_and_exit; } set_buffer_verified(bh); i = search_dirblock(bh, dir, &fname, @@ -1485,7 +1500,7 @@ static struct buffer_head * ext4_dx_find_entry(struct inode *dir, struct ext4_dir_entry_2 **res_dir) { struct super_block * sb = dir->i_sb; - struct dx_frame frames[2], *frame; + struct dx_frame frames[EXT4_HTREE_LEVEL], *frame; struct buffer_head *bh; ext4_lblk_t block; int retval; @@ -1889,7 +1904,7 @@ static int add_dirent_to_buf(handle_t *handle, struct ext4_filename *fname, */ dir->i_mtime = dir->i_ctime = current_time(dir); ext4_update_dx_flag(dir); - dir->i_version++; + inode_inc_iversion(dir); ext4_mark_inode_dirty(handle, dir); BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata"); err = ext4_handle_dirty_dirent_node(handle, dir, bh); @@ -1908,7 +1923,7 @@ static int make_indexed_dir(handle_t *handle, struct ext4_filename *fname, { struct buffer_head *bh2; struct dx_root *root; - struct dx_frame frames[2], *frame; + struct dx_frame frames[EXT4_HTREE_LEVEL], *frame; struct dx_entry *entries; struct ext4_dir_entry_2 *de, *de2; struct ext4_dir_entry_tail *t; @@ -2127,13 +2142,16 @@ out: static int ext4_dx_add_entry(handle_t *handle, struct ext4_filename *fname, struct inode *dir, struct inode *inode) { - struct dx_frame frames[2], *frame; + struct dx_frame frames[EXT4_HTREE_LEVEL], *frame; struct dx_entry *entries, *at; struct buffer_head *bh; struct super_block *sb = dir->i_sb; struct ext4_dir_entry_2 *de; + int restart; int err; +again: + restart = 0; frame = dx_probe(fname, dir, NULL, frames); if (IS_ERR(frame)) return PTR_ERR(frame); @@ -2155,24 +2173,44 @@ static int ext4_dx_add_entry(handle_t *handle, struct ext4_filename *fname, if (err != -ENOSPC) goto cleanup; + err = 0; /* Block full, should compress but for now just split */ dxtrace(printk(KERN_DEBUG "using %u of %u node entries\n", dx_get_count(entries), dx_get_limit(entries))); /* Need to split index? */ if (dx_get_count(entries) == dx_get_limit(entries)) { ext4_lblk_t newblock; - unsigned icount = dx_get_count(entries); - int levels = frame - frames; + int levels = frame - frames + 1; + unsigned int icount; + int add_level = 1; struct dx_entry *entries2; struct dx_node *node2; struct buffer_head *bh2; - if (levels && (dx_get_count(frames->entries) == - dx_get_limit(frames->entries))) { - ext4_warning_inode(dir, "Directory index full!"); + while (frame > frames) { + if (dx_get_count((frame - 1)->entries) < + dx_get_limit((frame - 1)->entries)) { + add_level = 0; + break; + } + frame--; /* split higher index block */ + at = frame->at; + entries = frame->entries; + restart = 1; + } + if (add_level && levels == ext4_dir_htree_level(sb)) { + ext4_warning(sb, "Directory (ino: %lu) index full, " + "reach max htree level :%d", + dir->i_ino, levels); + if (ext4_dir_htree_level(sb) < EXT4_HTREE_LEVEL) { + ext4_warning(sb, "Large directory feature is " + "not enabled on this " + "filesystem"); + } err = -ENOSPC; goto cleanup; } + icount = dx_get_count(entries); bh2 = ext4_append(handle, dir, &newblock); if (IS_ERR(bh2)) { err = PTR_ERR(bh2); @@ -2187,7 +2225,7 @@ static int ext4_dx_add_entry(handle_t *handle, struct ext4_filename *fname, err = ext4_journal_get_write_access(handle, frame->bh); if (err) goto journal_error; - if (levels) { + if (!add_level) { unsigned icount1 = icount/2, icount2 = icount - icount1; unsigned hash2 = dx_get_hash(entries + icount1); dxtrace(printk(KERN_DEBUG "Split index %i/%i\n", @@ -2195,7 +2233,7 @@ static int ext4_dx_add_entry(handle_t *handle, struct ext4_filename *fname, BUFFER_TRACE(frame->bh, "get_write_access"); /* index root */ err = ext4_journal_get_write_access(handle, - frames[0].bh); + (frame - 1)->bh); if (err) goto journal_error; @@ -2211,17 +2249,25 @@ static int ext4_dx_add_entry(handle_t *handle, struct ext4_filename *fname, frame->entries = entries = entries2; swap(frame->bh, bh2); } - dx_insert_block(frames + 0, hash2, newblock); - dxtrace(dx_show_index("node", frames[1].entries)); + dx_insert_block((frame - 1), hash2, newblock); + dxtrace(dx_show_index("node", frame->entries)); dxtrace(dx_show_index("node", ((struct dx_node *) bh2->b_data)->entries)); err = ext4_handle_dirty_dx_node(handle, dir, bh2); if (err) goto journal_error; brelse (bh2); + err = ext4_handle_dirty_dx_node(handle, dir, + (frame - 1)->bh); + if (err) + goto journal_error; + if (restart) { + err = ext4_handle_dirty_dx_node(handle, dir, + frame->bh); + goto journal_error; + } } else { - dxtrace(printk(KERN_DEBUG - "Creating second level index...\n")); + struct dx_root *dxroot; memcpy((char *) entries2, (char *) entries, icount * sizeof(struct dx_entry)); dx_set_limit(entries2, dx_node_limit(dir)); @@ -2229,22 +2275,18 @@ static int ext4_dx_add_entry(handle_t *handle, struct ext4_filename *fname, /* Set up root */ dx_set_count(entries, 1); dx_set_block(entries + 0, newblock); - ((struct dx_root *) frames[0].bh->b_data)->info.indirect_levels = 1; - - /* Add new access path frame */ - frame = frames + 1; - frame->at = at = at - entries + entries2; - frame->entries = entries = entries2; - frame->bh = bh2; - err = ext4_journal_get_write_access(handle, - frame->bh); + dxroot = (struct dx_root *)frames[0].bh->b_data; + dxroot->info.indirect_levels += 1; + dxtrace(printk(KERN_DEBUG + "Creating %d level index...\n", + info->indirect_levels)); + err = ext4_handle_dirty_dx_node(handle, dir, frame->bh); if (err) goto journal_error; - } - err = ext4_handle_dirty_dx_node(handle, dir, frames[0].bh); - if (err) { - ext4_std_error(inode->i_sb, err); - goto cleanup; + err = ext4_handle_dirty_dx_node(handle, dir, bh2); + brelse(bh2); + restart = 1; + goto journal_error; } } de = do_split(handle, dir, &bh, frame, &fname->hinfo); @@ -2256,10 +2298,15 @@ static int ext4_dx_add_entry(handle_t *handle, struct ext4_filename *fname, goto cleanup; journal_error: - ext4_std_error(dir->i_sb, err); + ext4_std_error(dir->i_sb, err); /* this is a no-op if err == 0 */ cleanup: brelse(bh); dx_release(frames); + /* @restart is true means htree-path has been changed, we need to + * repeat dx_probe() to find out valid htree-path + */ + if (restart && err == 0) + goto again; return err; } @@ -2296,7 +2343,7 @@ int ext4_generic_delete_entry(handle_t *handle, blocksize); else de->inode = 0; - dir->i_version++; + inode_inc_iversion(dir); return 0; } i += ext4_rec_len_from_disk(de->rec_len, blocksize); diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 18f68f09d393..0886fe82e9c4 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -373,6 +373,9 @@ static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) struct ext4_journal_cb_entry *jce; BUG_ON(txn->t_state == T_FINISHED); + + ext4_process_freed_data(sb, txn->t_tid); + spin_lock(&sbi->s_md_lock); while (!list_empty(&txn->t_private_list)) { jce = list_entry(txn->t_private_list.next, @@ -927,9 +930,13 @@ static void ext4_put_super(struct super_block *sb) invalidate_bdev(sbi->journal_bdev); ext4_blkdev_remove(sbi); } - if (sbi->s_mb_cache) { - ext4_xattr_destroy_cache(sbi->s_mb_cache); - sbi->s_mb_cache = NULL; + if (sbi->s_ea_inode_cache) { + ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); + sbi->s_ea_inode_cache = NULL; + } + if (sbi->s_ea_block_cache) { + ext4_xattr_destroy_cache(sbi->s_ea_block_cache); + sbi->s_ea_block_cache = NULL; } if (sbi->s_mmp_tsk) kthread_stop(sbi->s_mmp_tsk); @@ -1143,7 +1150,16 @@ static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, void *fs_data) { handle_t *handle = fs_data; - int res, res2, retries = 0; + int res, res2, credits, retries = 0; + + /* + * Encrypting the root directory is not allowed because e2fsck expects + * lost+found to exist and be unencrypted, and encrypting the root + * directory would imply encrypting the lost+found directory as well as + * the filename "lost+found" itself. + */ + if (inode->i_ino == EXT4_ROOT_INO) + return -EPERM; res = ext4_convert_inline_data(inode); if (res) @@ -1178,8 +1194,12 @@ static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, if (res) return res; retry: - handle = ext4_journal_start(inode, EXT4_HT_MISC, - ext4_jbd2_credits_xattr(inode)); + res = ext4_xattr_set_credits(inode, len, false /* is_create */, + &credits); + if (res) + return res; + + handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); if (IS_ERR(handle)) return PTR_ERR(handle); @@ -1256,16 +1276,17 @@ static struct dquot **ext4_get_dquots(struct inode *inode) } static const struct dquot_operations ext4_quota_operations = { - .get_reserved_space = ext4_get_reserved_space, - .write_dquot = ext4_write_dquot, - .acquire_dquot = ext4_acquire_dquot, - .release_dquot = ext4_release_dquot, - .mark_dirty = ext4_mark_dquot_dirty, - .write_info = ext4_write_info, - .alloc_dquot = dquot_alloc, - .destroy_dquot = dquot_destroy, - .get_projid = ext4_get_projid, - .get_next_id = ext4_get_next_id, + .get_reserved_space = ext4_get_reserved_space, + .write_dquot = ext4_write_dquot, + .acquire_dquot = ext4_acquire_dquot, + .release_dquot = ext4_release_dquot, + .mark_dirty = ext4_mark_dquot_dirty, + .write_info = ext4_write_info, + .alloc_dquot = dquot_alloc, + .destroy_dquot = dquot_destroy, + .get_projid = ext4_get_projid, + .get_inode_usage = ext4_get_inode_usage, + .get_next_id = ext4_get_next_id, }; static const struct quotactl_ops ext4_qctl_operations = { @@ -1328,7 +1349,7 @@ enum { Opt_inode_readahead_blks, Opt_journal_ioprio, Opt_dioread_nolock, Opt_dioread_lock, Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, - Opt_max_dir_size_kb, Opt_nojournal_checksum, + Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, }; static const match_table_t tokens = { @@ -1411,6 +1432,8 @@ static const match_table_t tokens = { {Opt_noinit_itable, "noinit_itable"}, {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, {Opt_test_dummy_encryption, "test_dummy_encryption"}, + {Opt_nombcache, "nombcache"}, + {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ {Opt_removed, "check=none"}, /* mount option from ext2/3 */ {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ {Opt_removed, "reservation"}, /* mount option from ext2/3 */ @@ -1618,6 +1641,7 @@ static const struct mount_opts { {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, {Opt_max_dir_size_kb, 0, MOPT_GTE0}, {Opt_test_dummy_encryption, 0, MOPT_GTE0}, + {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, {Opt_err, 0, 0} }; @@ -3445,7 +3469,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) } /* Load the checksum driver */ - if (ext4_has_feature_metadata_csum(sb)) { + if (ext4_has_feature_metadata_csum(sb) || + ext4_has_feature_ea_inode(sb)) { sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); if (IS_ERR(sbi->s_chksum_driver)) { ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); @@ -3467,7 +3492,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) /* Precompute checksum seed for all metadata */ if (ext4_has_feature_csum_seed(sb)) sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); - else if (ext4_has_metadata_csum(sb)) + else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, sizeof(es->s_uuid)); @@ -3597,6 +3622,16 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) "The Hurd can't support 64-bit file systems"); goto failed_mount; } + + /* + * ea_inode feature uses l_i_version field which is not + * available in HURD_COMPAT mode. + */ + if (ext4_has_feature_ea_inode(sb)) { + ext4_msg(sb, KERN_ERR, + "ea_inode feature is not supported for Hurd"); + goto failed_mount; + } } if (IS_EXT2_SB(sb)) { @@ -4061,10 +4096,22 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; no_journal: - sbi->s_mb_cache = ext4_xattr_create_cache(); - if (!sbi->s_mb_cache) { - ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); - goto failed_mount_wq; + if (!test_opt(sb, NO_MBCACHE)) { + sbi->s_ea_block_cache = ext4_xattr_create_cache(); + if (!sbi->s_ea_block_cache) { + ext4_msg(sb, KERN_ERR, + "Failed to create ea_block_cache"); + goto failed_mount_wq; + } + + if (ext4_has_feature_ea_inode(sb)) { + sbi->s_ea_inode_cache = ext4_xattr_create_cache(); + if (!sbi->s_ea_inode_cache) { + ext4_msg(sb, KERN_ERR, + "Failed to create ea_inode_cache"); + goto failed_mount_wq; + } + } } if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && @@ -4296,9 +4343,13 @@ failed_mount4: if (EXT4_SB(sb)->rsv_conversion_wq) destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); failed_mount_wq: - if (sbi->s_mb_cache) { - ext4_xattr_destroy_cache(sbi->s_mb_cache); - sbi->s_mb_cache = NULL; + if (sbi->s_ea_inode_cache) { + ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); + sbi->s_ea_inode_cache = NULL; + } + if (sbi->s_ea_block_cache) { + ext4_xattr_destroy_cache(sbi->s_ea_block_cache); + sbi->s_ea_block_cache = NULL; } if (sbi->s_journal) { jbd2_journal_destroy(sbi->s_journal); @@ -4957,6 +5008,12 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data) } } + if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { + ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); + err = -EINVAL; + goto restore_opts; + } + if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { ext4_msg(sb, KERN_WARNING, "warning: refusing change of " "dax flag with busy inodes while remounting"); diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c index d74dc5f81a04..48c7a7d55ed3 100644 --- a/fs/ext4/sysfs.c +++ b/fs/ext4/sysfs.c @@ -100,7 +100,7 @@ static ssize_t reserved_clusters_store(struct ext4_attr *a, int ret; ret = kstrtoull(skip_spaces(buf), 0, &val); - if (!ret || val >= clusters) + if (ret || val >= clusters) return -EINVAL; atomic64_set(&sbi->s_resv_clusters, val); diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index 5d3c2536641c..cff4f41ced61 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -72,12 +72,14 @@ # define ea_bdebug(bh, fmt, ...) no_printk(fmt, ##__VA_ARGS__) #endif -static void ext4_xattr_cache_insert(struct mb_cache *, struct buffer_head *); -static struct buffer_head *ext4_xattr_cache_find(struct inode *, - struct ext4_xattr_header *, - struct mb_cache_entry **); -static void ext4_xattr_rehash(struct ext4_xattr_header *, - struct ext4_xattr_entry *); +static void ext4_xattr_block_cache_insert(struct mb_cache *, + struct buffer_head *); +static struct buffer_head * +ext4_xattr_block_cache_find(struct inode *, struct ext4_xattr_header *, + struct mb_cache_entry **); +static __le32 ext4_xattr_hash_entry(char *name, size_t name_len, __le32 *value, + size_t value_count); +static void ext4_xattr_rehash(struct ext4_xattr_header *); static const struct xattr_handler * const ext4_xattr_handler_map[] = { [EXT4_XATTR_INDEX_USER] = &ext4_xattr_user_handler, @@ -104,8 +106,22 @@ const struct xattr_handler *ext4_xattr_handlers[] = { NULL }; -#define EXT4_GET_MB_CACHE(inode) (((struct ext4_sb_info *) \ - inode->i_sb->s_fs_info)->s_mb_cache) +#define EA_BLOCK_CACHE(inode) (((struct ext4_sb_info *) \ + inode->i_sb->s_fs_info)->s_ea_block_cache) + +#define EA_INODE_CACHE(inode) (((struct ext4_sb_info *) \ + inode->i_sb->s_fs_info)->s_ea_inode_cache) + +static int +ext4_expand_inode_array(struct ext4_xattr_inode_array **ea_inode_array, + struct inode *inode); + +#ifdef CONFIG_LOCKDEP +void ext4_xattr_inode_set_class(struct inode *ea_inode) +{ + lockdep_set_subclass(&ea_inode->i_rwsem, 1); +} +#endif static __le32 ext4_xattr_block_csum(struct inode *inode, sector_t block_nr, @@ -177,9 +193,8 @@ ext4_xattr_check_entries(struct ext4_xattr_entry *entry, void *end, /* Check the values */ while (!IS_LAST_ENTRY(entry)) { - if (entry->e_value_block != 0) - return -EFSCORRUPTED; - if (entry->e_value_size != 0) { + if (entry->e_value_size != 0 && + entry->e_value_inum == 0) { u16 offs = le16_to_cpu(entry->e_value_offs); u32 size = le32_to_cpu(entry->e_value_size); void *value; @@ -269,6 +284,185 @@ ext4_xattr_find_entry(struct ext4_xattr_entry **pentry, int name_index, return cmp ? -ENODATA : 0; } +static u32 +ext4_xattr_inode_hash(struct ext4_sb_info *sbi, const void *buffer, size_t size) +{ + return ext4_chksum(sbi, sbi->s_csum_seed, buffer, size); +} + +static u64 ext4_xattr_inode_get_ref(struct inode *ea_inode) +{ + return ((u64)ea_inode->i_ctime.tv_sec << 32) | + ((u32)ea_inode->i_version); +} + +static void ext4_xattr_inode_set_ref(struct inode *ea_inode, u64 ref_count) +{ + ea_inode->i_ctime.tv_sec = (u32)(ref_count >> 32); + ea_inode->i_version = (u32)ref_count; +} + +static u32 ext4_xattr_inode_get_hash(struct inode *ea_inode) +{ + return (u32)ea_inode->i_atime.tv_sec; +} + +static void ext4_xattr_inode_set_hash(struct inode *ea_inode, u32 hash) +{ + ea_inode->i_atime.tv_sec = hash; +} + +/* + * Read the EA value from an inode. + */ +static int ext4_xattr_inode_read(struct inode *ea_inode, void *buf, size_t size) +{ + unsigned long block = 0; + struct buffer_head *bh; + int blocksize = ea_inode->i_sb->s_blocksize; + size_t csize, copied = 0; + void *copy_pos = buf; + + while (copied < size) { + csize = (size - copied) > blocksize ? blocksize : size - copied; + bh = ext4_bread(NULL, ea_inode, block, 0); + if (IS_ERR(bh)) + return PTR_ERR(bh); + if (!bh) + return -EFSCORRUPTED; + + memcpy(copy_pos, bh->b_data, csize); + brelse(bh); + + copy_pos += csize; + block += 1; + copied += csize; + } + return 0; +} + +static int ext4_xattr_inode_iget(struct inode *parent, unsigned long ea_ino, + struct inode **ea_inode) +{ + struct inode *inode; + int err; + + inode = ext4_iget(parent->i_sb, ea_ino); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + ext4_error(parent->i_sb, + "error while reading EA inode %lu err=%d", ea_ino, + err); + return err; + } + + if (is_bad_inode(inode)) { + ext4_error(parent->i_sb, + "error while reading EA inode %lu is_bad_inode", + ea_ino); + err = -EIO; + goto error; + } + + if (!(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL)) { + ext4_error(parent->i_sb, + "EA inode %lu does not have EXT4_EA_INODE_FL flag", + ea_ino); + err = -EINVAL; + goto error; + } + + *ea_inode = inode; + return 0; +error: + iput(inode); + return err; +} + +static int +ext4_xattr_inode_verify_hashes(struct inode *ea_inode, + struct ext4_xattr_entry *entry, void *buffer, + size_t size) +{ + u32 hash; + + /* Verify stored hash matches calculated hash. */ + hash = ext4_xattr_inode_hash(EXT4_SB(ea_inode->i_sb), buffer, size); + if (hash != ext4_xattr_inode_get_hash(ea_inode)) + return -EFSCORRUPTED; + + if (entry) { + __le32 e_hash, tmp_data; + + /* Verify entry hash. */ + tmp_data = cpu_to_le32(hash); + e_hash = ext4_xattr_hash_entry(entry->e_name, entry->e_name_len, + &tmp_data, 1); + if (e_hash != entry->e_hash) + return -EFSCORRUPTED; + } + return 0; +} + +#define EXT4_XATTR_INODE_GET_PARENT(inode) ((__u32)(inode)->i_mtime.tv_sec) + +/* + * Read xattr value from the EA inode. + */ +static int +ext4_xattr_inode_get(struct inode *inode, struct ext4_xattr_entry *entry, + void *buffer, size_t size) +{ + struct mb_cache *ea_inode_cache = EA_INODE_CACHE(inode); + struct inode *ea_inode; + int err; + + err = ext4_xattr_inode_iget(inode, le32_to_cpu(entry->e_value_inum), + &ea_inode); + if (err) { + ea_inode = NULL; + goto out; + } + + if (i_size_read(ea_inode) != size) { + ext4_warning_inode(ea_inode, + "ea_inode file size=%llu entry size=%zu", + i_size_read(ea_inode), size); + err = -EFSCORRUPTED; + goto out; + } + + err = ext4_xattr_inode_read(ea_inode, buffer, size); + if (err) + goto out; + + err = ext4_xattr_inode_verify_hashes(ea_inode, entry, buffer, size); + /* + * Compatibility check for old Lustre ea_inode implementation. Old + * version does not have hash validation, but it has a backpointer + * from ea_inode to the parent inode. + */ + if (err == -EFSCORRUPTED) { + if (EXT4_XATTR_INODE_GET_PARENT(ea_inode) != inode->i_ino || + ea_inode->i_generation != inode->i_generation) { + ext4_warning_inode(ea_inode, + "EA inode hash validation failed"); + goto out; + } + /* Do not add ea_inode to the cache. */ + ea_inode_cache = NULL; + } else if (err) + goto out; + + if (ea_inode_cache) + mb_cache_entry_create(ea_inode_cache, GFP_NOFS, + ext4_xattr_inode_get_hash(ea_inode), + ea_inode->i_ino, true /* reusable */); +out: + iput(ea_inode); + return err; +} + static int ext4_xattr_block_get(struct inode *inode, int name_index, const char *name, void *buffer, size_t buffer_size) @@ -277,7 +471,7 @@ ext4_xattr_block_get(struct inode *inode, int name_index, const char *name, struct ext4_xattr_entry *entry; size_t size; int error; - struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode); + struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode); ea_idebug(inode, "name=%d.%s, buffer=%p, buffer_size=%ld", name_index, name, buffer, (long)buffer_size); @@ -298,7 +492,7 @@ ext4_xattr_block_get(struct inode *inode, int name_index, const char *name, error = -EFSCORRUPTED; goto cleanup; } - ext4_xattr_cache_insert(ext4_mb_cache, bh); + ext4_xattr_block_cache_insert(ea_block_cache, bh); entry = BFIRST(bh); error = ext4_xattr_find_entry(&entry, name_index, name, 1); if (error) @@ -308,8 +502,15 @@ ext4_xattr_block_get(struct inode *inode, int name_index, const char *name, error = -ERANGE; if (size > buffer_size) goto cleanup; - memcpy(buffer, bh->b_data + le16_to_cpu(entry->e_value_offs), - size); + if (entry->e_value_inum) { + error = ext4_xattr_inode_get(inode, entry, buffer, + size); + if (error) + goto cleanup; + } else { + memcpy(buffer, bh->b_data + + le16_to_cpu(entry->e_value_offs), size); + } } error = size; @@ -350,8 +551,15 @@ ext4_xattr_ibody_get(struct inode *inode, int name_index, const char *name, error = -ERANGE; if (size > buffer_size) goto cleanup; - memcpy(buffer, (void *)IFIRST(header) + - le16_to_cpu(entry->e_value_offs), size); + if (entry->e_value_inum) { + error = ext4_xattr_inode_get(inode, entry, buffer, + size); + if (error) + goto cleanup; + } else { + memcpy(buffer, (void *)IFIRST(header) + + le16_to_cpu(entry->e_value_offs), size); + } } error = size; @@ -428,7 +636,6 @@ ext4_xattr_block_list(struct dentry *dentry, char *buffer, size_t buffer_size) struct inode *inode = d_inode(dentry); struct buffer_head *bh = NULL; int error; - struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode); ea_idebug(inode, "buffer=%p, buffer_size=%ld", buffer, (long)buffer_size); @@ -450,7 +657,7 @@ ext4_xattr_block_list(struct dentry *dentry, char *buffer, size_t buffer_size) error = -EFSCORRUPTED; goto cleanup; } - ext4_xattr_cache_insert(ext4_mb_cache, bh); + ext4_xattr_block_cache_insert(EA_BLOCK_CACHE(inode), bh); error = ext4_xattr_list_entries(dentry, BFIRST(bh), buffer, buffer_size); cleanup: @@ -539,15 +746,445 @@ static void ext4_xattr_update_super_block(handle_t *handle, } } +int ext4_get_inode_usage(struct inode *inode, qsize_t *usage) +{ + struct ext4_iloc iloc = { .bh = NULL }; + struct buffer_head *bh = NULL; + struct ext4_inode *raw_inode; + struct ext4_xattr_ibody_header *header; + struct ext4_xattr_entry *entry; + qsize_t ea_inode_refs = 0; + void *end; + int ret; + + lockdep_assert_held_read(&EXT4_I(inode)->xattr_sem); + + if (ext4_test_inode_state(inode, EXT4_STATE_XATTR)) { + ret = ext4_get_inode_loc(inode, &iloc); + if (ret) + goto out; + raw_inode = ext4_raw_inode(&iloc); + header = IHDR(inode, raw_inode); + end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size; + ret = xattr_check_inode(inode, header, end); + if (ret) + goto out; + + for (entry = IFIRST(header); !IS_LAST_ENTRY(entry); + entry = EXT4_XATTR_NEXT(entry)) + if (entry->e_value_inum) + ea_inode_refs++; + } + + if (EXT4_I(inode)->i_file_acl) { + bh = sb_bread(inode->i_sb, EXT4_I(inode)->i_file_acl); + if (!bh) { + ret = -EIO; + goto out; + } + + if (ext4_xattr_check_block(inode, bh)) { + ret = -EFSCORRUPTED; + goto out; + } + + for (entry = BFIRST(bh); !IS_LAST_ENTRY(entry); + entry = EXT4_XATTR_NEXT(entry)) + if (entry->e_value_inum) + ea_inode_refs++; + } + *usage = ea_inode_refs + 1; + ret = 0; +out: + brelse(iloc.bh); + brelse(bh); + return ret; +} + +static inline size_t round_up_cluster(struct inode *inode, size_t length) +{ + struct super_block *sb = inode->i_sb; + size_t cluster_size = 1 << (EXT4_SB(sb)->s_cluster_bits + + inode->i_blkbits); + size_t mask = ~(cluster_size - 1); + + return (length + cluster_size - 1) & mask; +} + +static int ext4_xattr_inode_alloc_quota(struct inode *inode, size_t len) +{ + int err; + + err = dquot_alloc_inode(inode); + if (err) + return err; + err = dquot_alloc_space_nodirty(inode, round_up_cluster(inode, len)); + if (err) + dquot_free_inode(inode); + return err; +} + +static void ext4_xattr_inode_free_quota(struct inode *inode, size_t len) +{ + dquot_free_space_nodirty(inode, round_up_cluster(inode, len)); + dquot_free_inode(inode); +} + +int __ext4_xattr_set_credits(struct super_block *sb, struct inode *inode, + struct buffer_head *block_bh, size_t value_len, + bool is_create) +{ + int credits; + int blocks; + + /* + * 1) Owner inode update + * 2) Ref count update on old xattr block + * 3) new xattr block + * 4) block bitmap update for new xattr block + * 5) group descriptor for new xattr block + * 6) block bitmap update for old xattr block + * 7) group descriptor for old block + * + * 6 & 7 can happen if we have two racing threads T_a and T_b + * which are each trying to set an xattr on inodes I_a and I_b + * which were both initially sharing an xattr block. + */ + credits = 7; + + /* Quota updates. */ + credits += EXT4_MAXQUOTAS_TRANS_BLOCKS(sb); + + /* + * In case of inline data, we may push out the data to a block, + * so we need to reserve credits for this eventuality + */ + if (inode && ext4_has_inline_data(inode)) + credits += ext4_writepage_trans_blocks(inode) + 1; + + /* We are done if ea_inode feature is not enabled. */ + if (!ext4_has_feature_ea_inode(sb)) + return credits; + + /* New ea_inode, inode map, block bitmap, group descriptor. */ + credits += 4; + + /* Data blocks. */ + blocks = (value_len + sb->s_blocksize - 1) >> sb->s_blocksize_bits; + + /* Indirection block or one level of extent tree. */ + blocks += 1; + + /* Block bitmap and group descriptor updates for each block. */ + credits += blocks * 2; + + /* Blocks themselves. */ + credits += blocks; + + if (!is_create) { + /* Dereference ea_inode holding old xattr value. + * Old ea_inode, inode map, block bitmap, group descriptor. + */ + credits += 4; + + /* Data blocks for old ea_inode. */ + blocks = XATTR_SIZE_MAX >> sb->s_blocksize_bits; + + /* Indirection block or one level of extent tree for old + * ea_inode. + */ + blocks += 1; + + /* Block bitmap and group descriptor updates for each block. */ + credits += blocks * 2; + } + + /* We may need to clone the existing xattr block in which case we need + * to increment ref counts for existing ea_inodes referenced by it. + */ + if (block_bh) { + struct ext4_xattr_entry *entry = BFIRST(block_bh); + + for (; !IS_LAST_ENTRY(entry); entry = EXT4_XATTR_NEXT(entry)) + if (entry->e_value_inum) + /* Ref count update on ea_inode. */ + credits += 1; + } + return credits; +} + +static int ext4_xattr_ensure_credits(handle_t *handle, struct inode *inode, + int credits, struct buffer_head *bh, + bool dirty, bool block_csum) +{ + int error; + + if (!ext4_handle_valid(handle)) + return 0; + + if (handle->h_buffer_credits >= credits) + return 0; + + error = ext4_journal_extend(handle, credits - handle->h_buffer_credits); + if (!error) + return 0; + if (error < 0) { + ext4_warning(inode->i_sb, "Extend journal (error %d)", error); + return error; + } + + if (bh && dirty) { + if (block_csum) + ext4_xattr_block_csum_set(inode, bh); + error = ext4_handle_dirty_metadata(handle, NULL, bh); + if (error) { + ext4_warning(inode->i_sb, "Handle metadata (error %d)", + error); + return error; + } + } + + error = ext4_journal_restart(handle, credits); + if (error) { + ext4_warning(inode->i_sb, "Restart journal (error %d)", error); + return error; + } + + if (bh) { + error = ext4_journal_get_write_access(handle, bh); + if (error) { + ext4_warning(inode->i_sb, + "Get write access failed (error %d)", + error); + return error; + } + } + return 0; +} + +static int ext4_xattr_inode_update_ref(handle_t *handle, struct inode *ea_inode, + int ref_change) +{ + struct mb_cache *ea_inode_cache = EA_INODE_CACHE(ea_inode); + struct ext4_iloc iloc; + s64 ref_count; + u32 hash; + int ret; + + inode_lock(ea_inode); + + ret = ext4_reserve_inode_write(handle, ea_inode, &iloc); + if (ret) { + iloc.bh = NULL; + goto out; + } + + ref_count = ext4_xattr_inode_get_ref(ea_inode); + ref_count += ref_change; + ext4_xattr_inode_set_ref(ea_inode, ref_count); + + if (ref_change > 0) { + WARN_ONCE(ref_count <= 0, "EA inode %lu ref_count=%lld", + ea_inode->i_ino, ref_count); + + if (ref_count == 1) { + WARN_ONCE(ea_inode->i_nlink, "EA inode %lu i_nlink=%u", + ea_inode->i_ino, ea_inode->i_nlink); + + set_nlink(ea_inode, 1); + ext4_orphan_del(handle, ea_inode); + + if (ea_inode_cache) { + hash = ext4_xattr_inode_get_hash(ea_inode); + mb_cache_entry_create(ea_inode_cache, + GFP_NOFS, hash, + ea_inode->i_ino, + true /* reusable */); + } + } + } else { + WARN_ONCE(ref_count < 0, "EA inode %lu ref_count=%lld", + ea_inode->i_ino, ref_count); + + if (ref_count == 0) { + WARN_ONCE(ea_inode->i_nlink != 1, + "EA inode %lu i_nlink=%u", + ea_inode->i_ino, ea_inode->i_nlink); + + clear_nlink(ea_inode); + ext4_orphan_add(handle, ea_inode); + + if (ea_inode_cache) { + hash = ext4_xattr_inode_get_hash(ea_inode); + mb_cache_entry_delete(ea_inode_cache, hash, + ea_inode->i_ino); + } + } + } + + ret = ext4_mark_iloc_dirty(handle, ea_inode, &iloc); + iloc.bh = NULL; + if (ret) + ext4_warning_inode(ea_inode, + "ext4_mark_iloc_dirty() failed ret=%d", ret); +out: + brelse(iloc.bh); + inode_unlock(ea_inode); + return ret; +} + +static int ext4_xattr_inode_inc_ref(handle_t *handle, struct inode *ea_inode) +{ + return ext4_xattr_inode_update_ref(handle, ea_inode, 1); +} + +static int ext4_xattr_inode_dec_ref(handle_t *handle, struct inode *ea_inode) +{ + return ext4_xattr_inode_update_ref(handle, ea_inode, -1); +} + +static int ext4_xattr_inode_inc_ref_all(handle_t *handle, struct inode *parent, + struct ext4_xattr_entry *first) +{ + struct inode *ea_inode; + struct ext4_xattr_entry *entry; + struct ext4_xattr_entry *failed_entry; + unsigned int ea_ino; + int err, saved_err; + + for (entry = first; !IS_LAST_ENTRY(entry); + entry = EXT4_XATTR_NEXT(entry)) { + if (!entry->e_value_inum) + continue; + ea_ino = le32_to_cpu(entry->e_value_inum); + err = ext4_xattr_inode_iget(parent, ea_ino, &ea_inode); + if (err) + goto cleanup; + err = ext4_xattr_inode_inc_ref(handle, ea_inode); + if (err) { + ext4_warning_inode(ea_inode, "inc ref error %d", err); + iput(ea_inode); + goto cleanup; + } + iput(ea_inode); + } + return 0; + +cleanup: + saved_err = err; + failed_entry = entry; + + for (entry = first; entry != failed_entry; + entry = EXT4_XATTR_NEXT(entry)) { + if (!entry->e_value_inum) + continue; + ea_ino = le32_to_cpu(entry->e_value_inum); + err = ext4_xattr_inode_iget(parent, ea_ino, &ea_inode); + if (err) { + ext4_warning(parent->i_sb, + "cleanup ea_ino %u iget error %d", ea_ino, + err); + continue; + } + err = ext4_xattr_inode_dec_ref(handle, ea_inode); + if (err) + ext4_warning_inode(ea_inode, "cleanup dec ref error %d", + err); + iput(ea_inode); + } + return saved_err; +} + +static void +ext4_xattr_inode_dec_ref_all(handle_t *handle, struct inode *parent, + struct buffer_head *bh, + struct ext4_xattr_entry *first, bool block_csum, + struct ext4_xattr_inode_array **ea_inode_array, + int extra_credits, bool skip_quota) +{ + struct inode *ea_inode; + struct ext4_xattr_entry *entry; + bool dirty = false; + unsigned int ea_ino; + int err; + int credits; + + /* One credit for dec ref on ea_inode, one for orphan list addition, */ + credits = 2 + extra_credits; + + for (entry = first; !IS_LAST_ENTRY(entry); + entry = EXT4_XATTR_NEXT(entry)) { + if (!entry->e_value_inum) + continue; + ea_ino = le32_to_cpu(entry->e_value_inum); + err = ext4_xattr_inode_iget(parent, ea_ino, &ea_inode); + if (err) + continue; + + err = ext4_expand_inode_array(ea_inode_array, ea_inode); + if (err) { + ext4_warning_inode(ea_inode, + "Expand inode array err=%d", err); + iput(ea_inode); + continue; + } + + err = ext4_xattr_ensure_credits(handle, parent, credits, bh, + dirty, block_csum); + if (err) { + ext4_warning_inode(ea_inode, "Ensure credits err=%d", + err); + continue; + } + + err = ext4_xattr_inode_dec_ref(handle, ea_inode); + if (err) { + ext4_warning_inode(ea_inode, "ea_inode dec ref err=%d", + err); + continue; + } + + if (!skip_quota) + ext4_xattr_inode_free_quota(parent, + le32_to_cpu(entry->e_value_size)); + + /* + * Forget about ea_inode within the same transaction that + * decrements the ref count. This avoids duplicate decrements in + * case the rest of the work spills over to subsequent + * transactions. + */ + entry->e_value_inum = 0; + entry->e_value_size = 0; + + dirty = true; + } + + if (dirty) { + /* + * Note that we are deliberately skipping csum calculation for + * the final update because we do not expect any journal + * restarts until xattr block is freed. + */ + + err = ext4_handle_dirty_metadata(handle, NULL, bh); + if (err) + ext4_warning_inode(parent, + "handle dirty metadata err=%d", err); + } +} + /* * Release the xattr block BH: If the reference count is > 1, decrement it; * otherwise free the block. */ static void ext4_xattr_release_block(handle_t *handle, struct inode *inode, - struct buffer_head *bh) + struct buffer_head *bh, + struct ext4_xattr_inode_array **ea_inode_array, + int extra_credits) { - struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode); + struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode); u32 hash, ref; int error = 0; @@ -565,9 +1202,19 @@ ext4_xattr_release_block(handle_t *handle, struct inode *inode, * This must happen under buffer lock for * ext4_xattr_block_set() to reliably detect freed block */ - mb_cache_entry_delete_block(ext4_mb_cache, hash, bh->b_blocknr); + if (ea_block_cache) + mb_cache_entry_delete(ea_block_cache, hash, + bh->b_blocknr); get_bh(bh); unlock_buffer(bh); + + if (ext4_has_feature_ea_inode(inode->i_sb)) + ext4_xattr_inode_dec_ref_all(handle, inode, bh, + BFIRST(bh), + true /* block_csum */, + ea_inode_array, + extra_credits, + true /* skip_quota */); ext4_free_blocks(handle, inode, bh, 0, 1, EXT4_FREE_BLOCKS_METADATA | EXT4_FREE_BLOCKS_FORGET); @@ -577,11 +1224,13 @@ ext4_xattr_release_block(handle_t *handle, struct inode *inode, if (ref == EXT4_XATTR_REFCOUNT_MAX - 1) { struct mb_cache_entry *ce; - ce = mb_cache_entry_get(ext4_mb_cache, hash, - bh->b_blocknr); - if (ce) { - ce->e_reusable = 1; - mb_cache_entry_put(ext4_mb_cache, ce); + if (ea_block_cache) { + ce = mb_cache_entry_get(ea_block_cache, hash, + bh->b_blocknr); + if (ce) { + ce->e_reusable = 1; + mb_cache_entry_put(ea_block_cache, ce); + } } } @@ -620,7 +1269,7 @@ static size_t ext4_xattr_free_space(struct ext4_xattr_entry *last, size_t *min_offs, void *base, int *total) { for (; !IS_LAST_ENTRY(last); last = EXT4_XATTR_NEXT(last)) { - if (last->e_value_size) { + if (!last->e_value_inum && last->e_value_size) { size_t offs = le16_to_cpu(last->e_value_offs); if (offs < *min_offs) *min_offs = offs; @@ -631,113 +1280,454 @@ static size_t ext4_xattr_free_space(struct ext4_xattr_entry *last, return (*min_offs - ((void *)last - base) - sizeof(__u32)); } -static int -ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s) +/* + * Write the value of the EA in an inode. + */ +static int ext4_xattr_inode_write(handle_t *handle, struct inode *ea_inode, + const void *buf, int bufsize) +{ + struct buffer_head *bh = NULL; + unsigned long block = 0; + int blocksize = ea_inode->i_sb->s_blocksize; + int max_blocks = (bufsize + blocksize - 1) >> ea_inode->i_blkbits; + int csize, wsize = 0; + int ret = 0; + int retries = 0; + +retry: + while (ret >= 0 && ret < max_blocks) { + struct ext4_map_blocks map; + map.m_lblk = block += ret; + map.m_len = max_blocks -= ret; + + ret = ext4_map_blocks(handle, ea_inode, &map, + EXT4_GET_BLOCKS_CREATE); + if (ret <= 0) { + ext4_mark_inode_dirty(handle, ea_inode); + if (ret == -ENOSPC && + ext4_should_retry_alloc(ea_inode->i_sb, &retries)) { + ret = 0; + goto retry; + } + break; + } + } + + if (ret < 0) + return ret; + + block = 0; + while (wsize < bufsize) { + if (bh != NULL) + brelse(bh); + csize = (bufsize - wsize) > blocksize ? blocksize : + bufsize - wsize; + bh = ext4_getblk(handle, ea_inode, block, 0); + if (IS_ERR(bh)) + return PTR_ERR(bh); + ret = ext4_journal_get_write_access(handle, bh); + if (ret) + goto out; + + memcpy(bh->b_data, buf, csize); + set_buffer_uptodate(bh); + ext4_handle_dirty_metadata(handle, ea_inode, bh); + + buf += csize; + wsize += csize; + block += 1; + } + + inode_lock(ea_inode); + i_size_write(ea_inode, wsize); + ext4_update_i_disksize(ea_inode, wsize); + inode_unlock(ea_inode); + + ext4_mark_inode_dirty(handle, ea_inode); + +out: + brelse(bh); + + return ret; +} + +/* + * Create an inode to store the value of a large EA. + */ +static struct inode *ext4_xattr_inode_create(handle_t *handle, + struct inode *inode, u32 hash) +{ + struct inode *ea_inode = NULL; + uid_t owner[2] = { i_uid_read(inode), i_gid_read(inode) }; + int err; + + /* + * Let the next inode be the goal, so we try and allocate the EA inode + * in the same group, or nearby one. + */ + ea_inode = ext4_new_inode(handle, inode->i_sb->s_root->d_inode, + S_IFREG | 0600, NULL, inode->i_ino + 1, owner, + EXT4_EA_INODE_FL); + if (!IS_ERR(ea_inode)) { + ea_inode->i_op = &ext4_file_inode_operations; + ea_inode->i_fop = &ext4_file_operations; + ext4_set_aops(ea_inode); + ext4_xattr_inode_set_class(ea_inode); + unlock_new_inode(ea_inode); + ext4_xattr_inode_set_ref(ea_inode, 1); + ext4_xattr_inode_set_hash(ea_inode, hash); + err = ext4_mark_inode_dirty(handle, ea_inode); + if (!err) + err = ext4_inode_attach_jinode(ea_inode); + if (err) { + iput(ea_inode); + return ERR_PTR(err); + } + + /* + * Xattr inodes are shared therefore quota charging is performed + * at a higher level. + */ + dquot_free_inode(ea_inode); + dquot_drop(ea_inode); + inode_lock(ea_inode); + ea_inode->i_flags |= S_NOQUOTA; + inode_unlock(ea_inode); + } + + return ea_inode; +} + +static struct inode * +ext4_xattr_inode_cache_find(struct inode *inode, const void *value, + size_t value_len, u32 hash) +{ + struct inode *ea_inode; + struct mb_cache_entry *ce; + struct mb_cache *ea_inode_cache = EA_INODE_CACHE(inode); + void *ea_data; + + if (!ea_inode_cache) + return NULL; + + ce = mb_cache_entry_find_first(ea_inode_cache, hash); + if (!ce) + return NULL; + + ea_data = ext4_kvmalloc(value_len, GFP_NOFS); + if (!ea_data) { + mb_cache_entry_put(ea_inode_cache, ce); + return NULL; + } + + while (ce) { + ea_inode = ext4_iget(inode->i_sb, ce->e_value); + if (!IS_ERR(ea_inode) && + !is_bad_inode(ea_inode) && + (EXT4_I(ea_inode)->i_flags & EXT4_EA_INODE_FL) && + i_size_read(ea_inode) == value_len && + !ext4_xattr_inode_read(ea_inode, ea_data, value_len) && + !ext4_xattr_inode_verify_hashes(ea_inode, NULL, ea_data, + value_len) && + !memcmp(value, ea_data, value_len)) { + mb_cache_entry_touch(ea_inode_cache, ce); + mb_cache_entry_put(ea_inode_cache, ce); + kvfree(ea_data); + return ea_inode; + } + + if (!IS_ERR(ea_inode)) + iput(ea_inode); + ce = mb_cache_entry_find_next(ea_inode_cache, ce); + } + kvfree(ea_data); + return NULL; +} + +/* + * Add value of the EA in an inode. + */ +static int ext4_xattr_inode_lookup_create(handle_t *handle, struct inode *inode, + const void *value, size_t value_len, + struct inode **ret_inode) +{ + struct inode *ea_inode; + u32 hash; + int err; + + hash = ext4_xattr_inode_hash(EXT4_SB(inode->i_sb), value, value_len); + ea_inode = ext4_xattr_inode_cache_find(inode, value, value_len, hash); + if (ea_inode) { + err = ext4_xattr_inode_inc_ref(handle, ea_inode); + if (err) { + iput(ea_inode); + return err; + } + + *ret_inode = ea_inode; + return 0; + } + + /* Create an inode for the EA value */ + ea_inode = ext4_xattr_inode_create(handle, inode, hash); + if (IS_ERR(ea_inode)) + return PTR_ERR(ea_inode); + + err = ext4_xattr_inode_write(handle, ea_inode, value, value_len); + if (err) { + ext4_xattr_inode_dec_ref(handle, ea_inode); + iput(ea_inode); + return err; + } + + if (EA_INODE_CACHE(inode)) + mb_cache_entry_create(EA_INODE_CACHE(inode), GFP_NOFS, hash, + ea_inode->i_ino, true /* reusable */); + + *ret_inode = ea_inode; + return 0; +} + +/* + * Reserve min(block_size/8, 1024) bytes for xattr entries/names if ea_inode + * feature is enabled. + */ +#define EXT4_XATTR_BLOCK_RESERVE(inode) min(i_blocksize(inode)/8, 1024U) + +static int ext4_xattr_set_entry(struct ext4_xattr_info *i, + struct ext4_xattr_search *s, + handle_t *handle, struct inode *inode, + bool is_block) { struct ext4_xattr_entry *last; - size_t free, min_offs = s->end - s->base, name_len = strlen(i->name); + struct ext4_xattr_entry *here = s->here; + size_t min_offs = s->end - s->base, name_len = strlen(i->name); + int in_inode = i->in_inode; + struct inode *old_ea_inode = NULL; + struct inode *new_ea_inode = NULL; + size_t old_size, new_size; + int ret; + + /* Space used by old and new values. */ + old_size = (!s->not_found && !here->e_value_inum) ? + EXT4_XATTR_SIZE(le32_to_cpu(here->e_value_size)) : 0; + new_size = (i->value && !in_inode) ? EXT4_XATTR_SIZE(i->value_len) : 0; + + /* + * Optimization for the simple case when old and new values have the + * same padded sizes. Not applicable if external inodes are involved. + */ + if (new_size && new_size == old_size) { + size_t offs = le16_to_cpu(here->e_value_offs); + void *val = s->base + offs; + + here->e_value_size = cpu_to_le32(i->value_len); + if (i->value == EXT4_ZERO_XATTR_VALUE) { + memset(val, 0, new_size); + } else { + memcpy(val, i->value, i->value_len); + /* Clear padding bytes. */ + memset(val + i->value_len, 0, new_size - i->value_len); + } + return 0; + } /* Compute min_offs and last. */ last = s->first; for (; !IS_LAST_ENTRY(last); last = EXT4_XATTR_NEXT(last)) { - if (last->e_value_size) { + if (!last->e_value_inum && last->e_value_size) { size_t offs = le16_to_cpu(last->e_value_offs); if (offs < min_offs) min_offs = offs; } } - free = min_offs - ((void *)last - s->base) - sizeof(__u32); - if (!s->not_found) { - if (s->here->e_value_size) { - size_t size = le32_to_cpu(s->here->e_value_size); - free += EXT4_XATTR_SIZE(size); - } - free += EXT4_XATTR_LEN(name_len); - } + + /* Check whether we have enough space. */ if (i->value) { - if (free < EXT4_XATTR_LEN(name_len) + - EXT4_XATTR_SIZE(i->value_len)) - return -ENOSPC; + size_t free; + + free = min_offs - ((void *)last - s->base) - sizeof(__u32); + if (!s->not_found) + free += EXT4_XATTR_LEN(name_len) + old_size; + + if (free < EXT4_XATTR_LEN(name_len) + new_size) { + ret = -ENOSPC; + goto out; + } + + /* + * If storing the value in an external inode is an option, + * reserve space for xattr entries/names in the external + * attribute block so that a long value does not occupy the + * whole space and prevent futher entries being added. + */ + if (ext4_has_feature_ea_inode(inode->i_sb) && + new_size && is_block && + (min_offs + old_size - new_size) < + EXT4_XATTR_BLOCK_RESERVE(inode)) { + ret = -ENOSPC; + goto out; + } } - if (i->value && s->not_found) { - /* Insert the new name. */ + /* + * Getting access to old and new ea inodes is subject to failures. + * Finish that work before doing any modifications to the xattr data. + */ + if (!s->not_found && here->e_value_inum) { + ret = ext4_xattr_inode_iget(inode, + le32_to_cpu(here->e_value_inum), + &old_ea_inode); + if (ret) { + old_ea_inode = NULL; + goto out; + } + } + if (i->value && in_inode) { + WARN_ON_ONCE(!i->value_len); + + ret = ext4_xattr_inode_alloc_quota(inode, i->value_len); + if (ret) + goto out; + + ret = ext4_xattr_inode_lookup_create(handle, inode, i->value, + i->value_len, + &new_ea_inode); + if (ret) { + new_ea_inode = NULL; + ext4_xattr_inode_free_quota(inode, i->value_len); + goto out; + } + } + + if (old_ea_inode) { + /* We are ready to release ref count on the old_ea_inode. */ + ret = ext4_xattr_inode_dec_ref(handle, old_ea_inode); + if (ret) { + /* Release newly required ref count on new_ea_inode. */ + if (new_ea_inode) { + int err; + + err = ext4_xattr_inode_dec_ref(handle, + new_ea_inode); + if (err) + ext4_warning_inode(new_ea_inode, + "dec ref new_ea_inode err=%d", + err); + ext4_xattr_inode_free_quota(inode, + i->value_len); + } + goto out; + } + + ext4_xattr_inode_free_quota(inode, + le32_to_cpu(here->e_value_size)); + } + + /* No failures allowed past this point. */ + + if (!s->not_found && here->e_value_offs) { + /* Remove the old value. */ + void *first_val = s->base + min_offs; + size_t offs = le16_to_cpu(here->e_value_offs); + void *val = s->base + offs; + + memmove(first_val + old_size, first_val, val - first_val); + memset(first_val, 0, old_size); + min_offs += old_size; + + /* Adjust all value offsets. */ + last = s->first; + while (!IS_LAST_ENTRY(last)) { + size_t o = le16_to_cpu(last->e_value_offs); + + if (!last->e_value_inum && + last->e_value_size && o < offs) + last->e_value_offs = cpu_to_le16(o + old_size); + last = EXT4_XATTR_NEXT(last); + } + } + + if (!i->value) { + /* Remove old name. */ size_t size = EXT4_XATTR_LEN(name_len); - size_t rest = (void *)last - (void *)s->here + sizeof(__u32); - memmove((void *)s->here + size, s->here, rest); - memset(s->here, 0, size); - s->here->e_name_index = i->name_index; - s->here->e_name_len = name_len; - memcpy(s->here->e_name, i->name, name_len); + + last = ENTRY((void *)last - size); + memmove(here, (void *)here + size, + (void *)last - (void *)here + sizeof(__u32)); + memset(last, 0, size); + } else if (s->not_found) { + /* Insert new name. */ + size_t size = EXT4_XATTR_LEN(name_len); + size_t rest = (void *)last - (void *)here + sizeof(__u32); + + memmove((void *)here + size, here, rest); + memset(here, 0, size); + here->e_name_index = i->name_index; + here->e_name_len = name_len; + memcpy(here->e_name, i->name, name_len); } else { - if (s->here->e_value_size) { - void *first_val = s->base + min_offs; - size_t offs = le16_to_cpu(s->here->e_value_offs); - void *val = s->base + offs; - size_t size = EXT4_XATTR_SIZE( - le32_to_cpu(s->here->e_value_size)); - - if (i->value && size == EXT4_XATTR_SIZE(i->value_len)) { - /* The old and the new value have the same - size. Just replace. */ - s->here->e_value_size = - cpu_to_le32(i->value_len); - if (i->value == EXT4_ZERO_XATTR_VALUE) { - memset(val, 0, size); - } else { - /* Clear pad bytes first. */ - memset(val + size - EXT4_XATTR_PAD, 0, - EXT4_XATTR_PAD); - memcpy(val, i->value, i->value_len); - } - return 0; - } - - /* Remove the old value. */ - memmove(first_val + size, first_val, val - first_val); - memset(first_val, 0, size); - s->here->e_value_size = 0; - s->here->e_value_offs = 0; - min_offs += size; - - /* Adjust all value offsets. */ - last = s->first; - while (!IS_LAST_ENTRY(last)) { - size_t o = le16_to_cpu(last->e_value_offs); - if (last->e_value_size && o < offs) - last->e_value_offs = - cpu_to_le16(o + size); - last = EXT4_XATTR_NEXT(last); - } - } - if (!i->value) { - /* Remove the old name. */ - size_t size = EXT4_XATTR_LEN(name_len); - last = ENTRY((void *)last - size); - memmove(s->here, (void *)s->here + size, - (void *)last - (void *)s->here + sizeof(__u32)); - memset(last, 0, size); - } + /* This is an update, reset value info. */ + here->e_value_inum = 0; + here->e_value_offs = 0; + here->e_value_size = 0; } if (i->value) { - /* Insert the new value. */ - s->here->e_value_size = cpu_to_le32(i->value_len); - if (i->value_len) { - size_t size = EXT4_XATTR_SIZE(i->value_len); - void *val = s->base + min_offs - size; - s->here->e_value_offs = cpu_to_le16(min_offs - size); + /* Insert new value. */ + if (in_inode) { + here->e_value_inum = cpu_to_le32(new_ea_inode->i_ino); + } else if (i->value_len) { + void *val = s->base + min_offs - new_size; + + here->e_value_offs = cpu_to_le16(min_offs - new_size); if (i->value == EXT4_ZERO_XATTR_VALUE) { - memset(val, 0, size); + memset(val, 0, new_size); } else { - /* Clear the pad bytes first. */ - memset(val + size - EXT4_XATTR_PAD, 0, - EXT4_XATTR_PAD); memcpy(val, i->value, i->value_len); + /* Clear padding bytes. */ + memset(val + i->value_len, 0, + new_size - i->value_len); } } + here->e_value_size = cpu_to_le32(i->value_len); } - return 0; + + if (i->value) { + __le32 hash = 0; + + /* Entry hash calculation. */ + if (in_inode) { + __le32 crc32c_hash; + + /* + * Feed crc32c hash instead of the raw value for entry + * hash calculation. This is to avoid walking + * potentially long value buffer again. + */ + crc32c_hash = cpu_to_le32( + ext4_xattr_inode_get_hash(new_ea_inode)); + hash = ext4_xattr_hash_entry(here->e_name, + here->e_name_len, + &crc32c_hash, 1); + } else if (is_block) { + __le32 *value = s->base + min_offs - new_size; + + hash = ext4_xattr_hash_entry(here->e_name, + here->e_name_len, value, + new_size >> 2); + } + here->e_hash = hash; + } + + if (is_block) + ext4_xattr_rehash((struct ext4_xattr_header *)s->base); + + ret = 0; +out: + iput(old_ea_inode); + iput(new_ea_inode); + return ret; } struct ext4_xattr_block_find { @@ -794,15 +1784,16 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode, { struct super_block *sb = inode->i_sb; struct buffer_head *new_bh = NULL; - struct ext4_xattr_search *s = &bs->s; + struct ext4_xattr_search s_copy = bs->s; + struct ext4_xattr_search *s = &s_copy; struct mb_cache_entry *ce = NULL; int error = 0; - struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode); + struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode); + struct inode *ea_inode = NULL; + size_t old_ea_inode_size = 0; #define header(x) ((struct ext4_xattr_header *)(x)) - if (i->value && i->value_len > sb->s_blocksize) - return -ENOSPC; if (s->base) { BUFFER_TRACE(bs->bh, "get_write_access"); error = ext4_journal_get_write_access(handle, bs->bh); @@ -818,17 +1809,15 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode, * ext4_xattr_block_set() to reliably detect modified * block */ - mb_cache_entry_delete_block(ext4_mb_cache, hash, - bs->bh->b_blocknr); + if (ea_block_cache) + mb_cache_entry_delete(ea_block_cache, hash, + bs->bh->b_blocknr); ea_bdebug(bs->bh, "modifying in-place"); - error = ext4_xattr_set_entry(i, s); - if (!error) { - if (!IS_LAST_ENTRY(s->first)) - ext4_xattr_rehash(header(s->base), - s->here); - ext4_xattr_cache_insert(ext4_mb_cache, - bs->bh); - } + error = ext4_xattr_set_entry(i, s, handle, inode, + true /* is_block */); + if (!error) + ext4_xattr_block_cache_insert(ea_block_cache, + bs->bh); ext4_xattr_block_csum_set(inode, bs->bh); unlock_buffer(bs->bh); if (error == -EFSCORRUPTED) @@ -854,6 +1843,24 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode, header(s->base)->h_refcount = cpu_to_le32(1); s->here = ENTRY(s->base + offset); s->end = s->base + bs->bh->b_size; + + /* + * If existing entry points to an xattr inode, we need + * to prevent ext4_xattr_set_entry() from decrementing + * ref count on it because the reference belongs to the + * original block. In this case, make the entry look + * like it has an empty value. + */ + if (!s->not_found && s->here->e_value_inum) { + /* + * Defer quota free call for previous inode + * until success is guaranteed. + */ + old_ea_inode_size = le32_to_cpu( + s->here->e_value_size); + s->here->e_value_inum = 0; + s->here->e_value_size = 0; + } } } else { /* Allocate a buffer where we construct the new block. */ @@ -870,17 +1877,33 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode, s->end = s->base + sb->s_blocksize; } - error = ext4_xattr_set_entry(i, s); + error = ext4_xattr_set_entry(i, s, handle, inode, true /* is_block */); if (error == -EFSCORRUPTED) goto bad_block; if (error) goto cleanup; - if (!IS_LAST_ENTRY(s->first)) - ext4_xattr_rehash(header(s->base), s->here); + + if (i->value && s->here->e_value_inum) { + unsigned int ea_ino; + + /* + * A ref count on ea_inode has been taken as part of the call to + * ext4_xattr_set_entry() above. We would like to drop this + * extra ref but we have to wait until the xattr block is + * initialized and has its own ref count on the ea_inode. + */ + ea_ino = le32_to_cpu(s->here->e_value_inum); + error = ext4_xattr_inode_iget(inode, ea_ino, &ea_inode); + if (error) { + ea_inode = NULL; + goto cleanup; + } + } inserted: if (!IS_LAST_ENTRY(s->first)) { - new_bh = ext4_xattr_cache_find(inode, header(s->base), &ce); + new_bh = ext4_xattr_block_cache_find(inode, header(s->base), + &ce); if (new_bh) { /* We found an identical block in the cache. */ if (new_bh == bs->bh) @@ -925,7 +1948,7 @@ inserted: EXT4_C2B(EXT4_SB(sb), 1)); brelse(new_bh); - mb_cache_entry_put(ext4_mb_cache, ce); + mb_cache_entry_put(ea_block_cache, ce); ce = NULL; new_bh = NULL; goto inserted; @@ -944,8 +1967,8 @@ inserted: if (error) goto cleanup_dquot; } - mb_cache_entry_touch(ext4_mb_cache, ce); - mb_cache_entry_put(ext4_mb_cache, ce); + mb_cache_entry_touch(ea_block_cache, ce); + mb_cache_entry_put(ea_block_cache, ce); ce = NULL; } else if (bs->bh && s->base == bs->bh->b_data) { /* We were modifying this block in-place. */ @@ -984,6 +2007,22 @@ getblk_failed: EXT4_FREE_BLOCKS_METADATA); goto cleanup; } + error = ext4_xattr_inode_inc_ref_all(handle, inode, + ENTRY(header(s->base)+1)); + if (error) + goto getblk_failed; + if (ea_inode) { + /* Drop the extra ref on ea_inode. */ + error = ext4_xattr_inode_dec_ref(handle, + ea_inode); + if (error) + ext4_warning_inode(ea_inode, + "dec ref error=%d", + error); + iput(ea_inode); + ea_inode = NULL; + } + lock_buffer(new_bh); error = ext4_journal_get_create_access(handle, new_bh); if (error) { @@ -995,7 +2034,7 @@ getblk_failed: ext4_xattr_block_csum_set(inode, new_bh); set_buffer_uptodate(new_bh); unlock_buffer(new_bh); - ext4_xattr_cache_insert(ext4_mb_cache, new_bh); + ext4_xattr_block_cache_insert(ea_block_cache, new_bh); error = ext4_handle_dirty_metadata(handle, inode, new_bh); if (error) @@ -1003,17 +2042,40 @@ getblk_failed: } } + if (old_ea_inode_size) + ext4_xattr_inode_free_quota(inode, old_ea_inode_size); + /* Update the inode. */ EXT4_I(inode)->i_file_acl = new_bh ? new_bh->b_blocknr : 0; /* Drop the previous xattr block. */ - if (bs->bh && bs->bh != new_bh) - ext4_xattr_release_block(handle, inode, bs->bh); + if (bs->bh && bs->bh != new_bh) { + struct ext4_xattr_inode_array *ea_inode_array = NULL; + + ext4_xattr_release_block(handle, inode, bs->bh, + &ea_inode_array, + 0 /* extra_credits */); + ext4_xattr_inode_array_free(ea_inode_array); + } error = 0; cleanup: + if (ea_inode) { + int error2; + + error2 = ext4_xattr_inode_dec_ref(handle, ea_inode); + if (error2) + ext4_warning_inode(ea_inode, "dec ref error=%d", + error2); + + /* If there was an error, revert the quota charge. */ + if (error) + ext4_xattr_inode_free_quota(inode, + i_size_read(ea_inode)); + iput(ea_inode); + } if (ce) - mb_cache_entry_put(ext4_mb_cache, ce); + mb_cache_entry_put(ea_block_cache, ce); brelse(new_bh); if (!(bs->bh && s->base == bs->bh->b_data)) kfree(s->base); @@ -1070,7 +2132,7 @@ int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode, if (EXT4_I(inode)->i_extra_isize == 0) return -ENOSPC; - error = ext4_xattr_set_entry(i, s); + error = ext4_xattr_set_entry(i, s, handle, inode, false /* is_block */); if (error) { if (error == -ENOSPC && ext4_has_inline_data(inode)) { @@ -1082,7 +2144,8 @@ int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode, error = ext4_xattr_ibody_find(inode, i, is); if (error) return error; - error = ext4_xattr_set_entry(i, s); + error = ext4_xattr_set_entry(i, s, handle, inode, + false /* is_block */); } if (error) return error; @@ -1098,7 +2161,7 @@ int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode, return 0; } -static int ext4_xattr_ibody_set(struct inode *inode, +static int ext4_xattr_ibody_set(handle_t *handle, struct inode *inode, struct ext4_xattr_info *i, struct ext4_xattr_ibody_find *is) { @@ -1108,7 +2171,7 @@ static int ext4_xattr_ibody_set(struct inode *inode, if (EXT4_I(inode)->i_extra_isize == 0) return -ENOSPC; - error = ext4_xattr_set_entry(i, s); + error = ext4_xattr_set_entry(i, s, handle, inode, false /* is_block */); if (error) return error; header = IHDR(inode, ext4_raw_inode(&is->iloc)); @@ -1127,12 +2190,31 @@ static int ext4_xattr_value_same(struct ext4_xattr_search *s, { void *value; + /* When e_value_inum is set the value is stored externally. */ + if (s->here->e_value_inum) + return 0; if (le32_to_cpu(s->here->e_value_size) != i->value_len) return 0; value = ((void *)s->base) + le16_to_cpu(s->here->e_value_offs); return !memcmp(value, i->value, i->value_len); } +static struct buffer_head *ext4_xattr_get_block(struct inode *inode) +{ + struct buffer_head *bh; + int error; + + if (!EXT4_I(inode)->i_file_acl) + return NULL; + bh = sb_bread(inode->i_sb, EXT4_I(inode)->i_file_acl); + if (!bh) + return ERR_PTR(-EIO); + error = ext4_xattr_check_block(inode, bh); + if (error) + return ERR_PTR(error); + return bh; +} + /* * ext4_xattr_set_handle() * @@ -1155,7 +2237,7 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index, .name = name, .value = value, .value_len = value_len, - + .in_inode = 0, }; struct ext4_xattr_ibody_find is = { .s = { .not_found = -ENODATA, }, @@ -1173,6 +2255,28 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index, ext4_write_lock_xattr(inode, &no_expand); + /* Check journal credits under write lock. */ + if (ext4_handle_valid(handle)) { + struct buffer_head *bh; + int credits; + + bh = ext4_xattr_get_block(inode); + if (IS_ERR(bh)) { + error = PTR_ERR(bh); + goto cleanup; + } + + credits = __ext4_xattr_set_credits(inode->i_sb, inode, bh, + value_len, + flags & XATTR_CREATE); + brelse(bh); + + if (!ext4_handle_has_enough_credits(handle, credits)) { + error = -ENOSPC; + goto cleanup; + } + } + error = ext4_reserve_inode_write(handle, inode, &is.iloc); if (error) goto cleanup; @@ -1202,9 +2306,10 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index, if (flags & XATTR_CREATE) goto cleanup; } + if (!value) { if (!is.s.not_found) - error = ext4_xattr_ibody_set(inode, &i, &is); + error = ext4_xattr_ibody_set(handle, inode, &i, &is); else if (!bs.s.not_found) error = ext4_xattr_block_set(handle, inode, &i, &bs); } else { @@ -1215,7 +2320,12 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index, if (!bs.s.not_found && ext4_xattr_value_same(&bs.s, &i)) goto cleanup; - error = ext4_xattr_ibody_set(inode, &i, &is); + if (ext4_has_feature_ea_inode(inode->i_sb) && + (EXT4_XATTR_SIZE(i.value_len) > + EXT4_XATTR_MIN_LARGE_EA_SIZE(inode->i_sb->s_blocksize))) + i.in_inode = 1; +retry_inode: + error = ext4_xattr_ibody_set(handle, inode, &i, &is); if (!error && !bs.s.not_found) { i.value = NULL; error = ext4_xattr_block_set(handle, inode, &i, &bs); @@ -1226,11 +2336,20 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index, goto cleanup; } error = ext4_xattr_block_set(handle, inode, &i, &bs); - if (error) - goto cleanup; - if (!is.s.not_found) { + if (!error && !is.s.not_found) { i.value = NULL; - error = ext4_xattr_ibody_set(inode, &i, &is); + error = ext4_xattr_ibody_set(handle, inode, &i, + &is); + } else if (error == -ENOSPC) { + /* + * Xattr does not fit in the block, store at + * external inode if possible. + */ + if (ext4_has_feature_ea_inode(inode->i_sb) && + !i.in_inode) { + i.in_inode = 1; + goto retry_inode; + } } } } @@ -1256,6 +2375,33 @@ cleanup: return error; } +int ext4_xattr_set_credits(struct inode *inode, size_t value_len, + bool is_create, int *credits) +{ + struct buffer_head *bh; + int err; + + *credits = 0; + + if (!EXT4_SB(inode->i_sb)->s_journal) + return 0; + + down_read(&EXT4_I(inode)->xattr_sem); + + bh = ext4_xattr_get_block(inode); + if (IS_ERR(bh)) { + err = PTR_ERR(bh); + } else { + *credits = __ext4_xattr_set_credits(inode->i_sb, inode, bh, + value_len, is_create); + brelse(bh); + err = 0; + } + + up_read(&EXT4_I(inode)->xattr_sem); + return err; +} + /* * ext4_xattr_set() * @@ -1269,13 +2415,20 @@ ext4_xattr_set(struct inode *inode, int name_index, const char *name, const void *value, size_t value_len, int flags) { handle_t *handle; + struct super_block *sb = inode->i_sb; int error, retries = 0; - int credits = ext4_jbd2_credits_xattr(inode); + int credits; error = dquot_initialize(inode); if (error) return error; + retry: + error = ext4_xattr_set_credits(inode, value_len, flags & XATTR_CREATE, + &credits); + if (error) + return error; + handle = ext4_journal_start(inode, EXT4_HT_XATTR, credits); if (IS_ERR(handle)) { error = PTR_ERR(handle); @@ -1286,7 +2439,7 @@ retry: value, value_len, flags); error2 = ext4_journal_stop(handle); if (error == -ENOSPC && - ext4_should_retry_alloc(inode->i_sb, &retries)) + ext4_should_retry_alloc(sb, &retries)) goto retry; if (error == 0) error = error2; @@ -1311,7 +2464,7 @@ static void ext4_xattr_shift_entries(struct ext4_xattr_entry *entry, /* Adjust the value offsets of the entries */ for (; !IS_LAST_ENTRY(last); last = EXT4_XATTR_NEXT(last)) { - if (last->e_value_size) { + if (!last->e_value_inum && last->e_value_size) { new_offs = le16_to_cpu(last->e_value_offs) + value_offs_shift; last->e_value_offs = cpu_to_le16(new_offs); @@ -1331,18 +2484,16 @@ static int ext4_xattr_move_to_block(handle_t *handle, struct inode *inode, struct ext4_xattr_ibody_find *is = NULL; struct ext4_xattr_block_find *bs = NULL; char *buffer = NULL, *b_entry_name = NULL; - size_t value_offs, value_size; + size_t value_size = le32_to_cpu(entry->e_value_size); struct ext4_xattr_info i = { .value = NULL, .value_len = 0, .name_index = entry->e_name_index, + .in_inode = !!entry->e_value_inum, }; struct ext4_xattr_ibody_header *header = IHDR(inode, raw_inode); int error; - value_offs = le16_to_cpu(entry->e_value_offs); - value_size = le32_to_cpu(entry->e_value_size); - is = kzalloc(sizeof(struct ext4_xattr_ibody_find), GFP_NOFS); bs = kzalloc(sizeof(struct ext4_xattr_block_find), GFP_NOFS); buffer = kmalloc(value_size, GFP_NOFS); @@ -1358,7 +2509,15 @@ static int ext4_xattr_move_to_block(handle_t *handle, struct inode *inode, bs->bh = NULL; /* Save the entry name and the entry value */ - memcpy(buffer, (void *)IFIRST(header) + value_offs, value_size); + if (entry->e_value_inum) { + error = ext4_xattr_inode_get(inode, entry, buffer, value_size); + if (error) + goto out; + } else { + size_t value_offs = le16_to_cpu(entry->e_value_offs); + memcpy(buffer, (void *)IFIRST(header) + value_offs, value_size); + } + memcpy(b_entry_name, entry->e_name, entry->e_name_len); b_entry_name[entry->e_name_len] = '\0'; i.name = b_entry_name; @@ -1372,11 +2531,10 @@ static int ext4_xattr_move_to_block(handle_t *handle, struct inode *inode, goto out; /* Remove the chosen entry from the inode */ - error = ext4_xattr_ibody_set(inode, &i, is); + error = ext4_xattr_ibody_set(handle, inode, &i, is); if (error) goto out; - i.name = b_entry_name; i.value = buffer; i.value_len = value_size; error = ext4_xattr_block_find(inode, &i, bs); @@ -1420,9 +2578,10 @@ static int ext4_xattr_make_inode_space(handle_t *handle, struct inode *inode, last = IFIRST(header); /* Find the entry best suited to be pushed into EA block */ for (; !IS_LAST_ENTRY(last); last = EXT4_XATTR_NEXT(last)) { - total_size = - EXT4_XATTR_SIZE(le32_to_cpu(last->e_value_size)) + - EXT4_XATTR_LEN(last->e_name_len); + total_size = EXT4_XATTR_LEN(last->e_name_len); + if (!last->e_value_inum) + total_size += EXT4_XATTR_SIZE( + le32_to_cpu(last->e_value_size)); if (total_size <= bfree && total_size < min_total_size) { if (total_size + ifree < isize_diff) { @@ -1441,8 +2600,10 @@ static int ext4_xattr_make_inode_space(handle_t *handle, struct inode *inode, } entry_size = EXT4_XATTR_LEN(entry->e_name_len); - total_size = entry_size + - EXT4_XATTR_SIZE(le32_to_cpu(entry->e_value_size)); + total_size = entry_size; + if (!entry->e_value_inum) + total_size += EXT4_XATTR_SIZE( + le32_to_cpu(entry->e_value_size)); error = ext4_xattr_move_to_block(handle, inode, raw_inode, entry); if (error) @@ -1571,51 +2732,172 @@ cleanup: return error; } +#define EIA_INCR 16 /* must be 2^n */ +#define EIA_MASK (EIA_INCR - 1) +/* Add the large xattr @inode into @ea_inode_array for deferred iput(). + * If @ea_inode_array is new or full it will be grown and the old + * contents copied over. + */ +static int +ext4_expand_inode_array(struct ext4_xattr_inode_array **ea_inode_array, + struct inode *inode) +{ + if (*ea_inode_array == NULL) { + /* + * Start with 15 inodes, so it fits into a power-of-two size. + * If *ea_inode_array is NULL, this is essentially offsetof() + */ + (*ea_inode_array) = + kmalloc(offsetof(struct ext4_xattr_inode_array, + inodes[EIA_MASK]), + GFP_NOFS); + if (*ea_inode_array == NULL) + return -ENOMEM; + (*ea_inode_array)->count = 0; + } else if (((*ea_inode_array)->count & EIA_MASK) == EIA_MASK) { + /* expand the array once all 15 + n * 16 slots are full */ + struct ext4_xattr_inode_array *new_array = NULL; + int count = (*ea_inode_array)->count; + + /* if new_array is NULL, this is essentially offsetof() */ + new_array = kmalloc( + offsetof(struct ext4_xattr_inode_array, + inodes[count + EIA_INCR]), + GFP_NOFS); + if (new_array == NULL) + return -ENOMEM; + memcpy(new_array, *ea_inode_array, + offsetof(struct ext4_xattr_inode_array, inodes[count])); + kfree(*ea_inode_array); + *ea_inode_array = new_array; + } + (*ea_inode_array)->inodes[(*ea_inode_array)->count++] = inode; + return 0; +} /* * ext4_xattr_delete_inode() * - * Free extended attribute resources associated with this inode. This - * is called immediately before an inode is freed. We have exclusive - * access to the inode. + * Free extended attribute resources associated with this inode. Traverse + * all entries and decrement reference on any xattr inodes associated with this + * inode. This is called immediately before an inode is freed. We have exclusive + * access to the inode. If an orphan inode is deleted it will also release its + * references on xattr block and xattr inodes. */ -void -ext4_xattr_delete_inode(handle_t *handle, struct inode *inode) +int ext4_xattr_delete_inode(handle_t *handle, struct inode *inode, + struct ext4_xattr_inode_array **ea_inode_array, + int extra_credits) { struct buffer_head *bh = NULL; + struct ext4_xattr_ibody_header *header; + struct ext4_iloc iloc = { .bh = NULL }; + struct ext4_xattr_entry *entry; + int error; - if (!EXT4_I(inode)->i_file_acl) - goto cleanup; - bh = sb_bread(inode->i_sb, EXT4_I(inode)->i_file_acl); - if (!bh) { - EXT4_ERROR_INODE(inode, "block %llu read error", - EXT4_I(inode)->i_file_acl); + error = ext4_xattr_ensure_credits(handle, inode, extra_credits, + NULL /* bh */, + false /* dirty */, + false /* block_csum */); + if (error) { + EXT4_ERROR_INODE(inode, "ensure credits (error %d)", error); goto cleanup; } - if (BHDR(bh)->h_magic != cpu_to_le32(EXT4_XATTR_MAGIC) || - BHDR(bh)->h_blocks != cpu_to_le32(1)) { - EXT4_ERROR_INODE(inode, "bad block %llu", - EXT4_I(inode)->i_file_acl); - goto cleanup; - } - ext4_xattr_release_block(handle, inode, bh); - EXT4_I(inode)->i_file_acl = 0; + if (ext4_has_feature_ea_inode(inode->i_sb) && + ext4_test_inode_state(inode, EXT4_STATE_XATTR)) { + + error = ext4_get_inode_loc(inode, &iloc); + if (error) { + EXT4_ERROR_INODE(inode, "inode loc (error %d)", error); + goto cleanup; + } + + error = ext4_journal_get_write_access(handle, iloc.bh); + if (error) { + EXT4_ERROR_INODE(inode, "write access (error %d)", + error); + goto cleanup; + } + + header = IHDR(inode, ext4_raw_inode(&iloc)); + if (header->h_magic == cpu_to_le32(EXT4_XATTR_MAGIC)) + ext4_xattr_inode_dec_ref_all(handle, inode, iloc.bh, + IFIRST(header), + false /* block_csum */, + ea_inode_array, + extra_credits, + false /* skip_quota */); + } + + if (EXT4_I(inode)->i_file_acl) { + bh = sb_bread(inode->i_sb, EXT4_I(inode)->i_file_acl); + if (!bh) { + EXT4_ERROR_INODE(inode, "block %llu read error", + EXT4_I(inode)->i_file_acl); + error = -EIO; + goto cleanup; + } + error = ext4_xattr_check_block(inode, bh); + if (error) { + EXT4_ERROR_INODE(inode, "bad block %llu (error %d)", + EXT4_I(inode)->i_file_acl, error); + goto cleanup; + } + + if (ext4_has_feature_ea_inode(inode->i_sb)) { + for (entry = BFIRST(bh); !IS_LAST_ENTRY(entry); + entry = EXT4_XATTR_NEXT(entry)) + if (entry->e_value_inum) + ext4_xattr_inode_free_quota(inode, + le32_to_cpu(entry->e_value_size)); + + } + + ext4_xattr_release_block(handle, inode, bh, ea_inode_array, + extra_credits); + /* + * Update i_file_acl value in the same transaction that releases + * block. + */ + EXT4_I(inode)->i_file_acl = 0; + error = ext4_mark_inode_dirty(handle, inode); + if (error) { + EXT4_ERROR_INODE(inode, "mark inode dirty (error %d)", + error); + goto cleanup; + } + } + error = 0; cleanup: + brelse(iloc.bh); brelse(bh); + return error; +} + +void ext4_xattr_inode_array_free(struct ext4_xattr_inode_array *ea_inode_array) +{ + int idx; + + if (ea_inode_array == NULL) + return; + + for (idx = 0; idx < ea_inode_array->count; ++idx) + iput(ea_inode_array->inodes[idx]); + kfree(ea_inode_array); } /* - * ext4_xattr_cache_insert() + * ext4_xattr_block_cache_insert() * - * Create a new entry in the extended attribute cache, and insert + * Create a new entry in the extended attribute block cache, and insert * it unless such an entry is already in the cache. * * Returns 0, or a negative error number on failure. */ static void -ext4_xattr_cache_insert(struct mb_cache *ext4_mb_cache, struct buffer_head *bh) +ext4_xattr_block_cache_insert(struct mb_cache *ea_block_cache, + struct buffer_head *bh) { struct ext4_xattr_header *header = BHDR(bh); __u32 hash = le32_to_cpu(header->h_hash); @@ -1623,7 +2905,9 @@ ext4_xattr_cache_insert(struct mb_cache *ext4_mb_cache, struct buffer_head *bh) EXT4_XATTR_REFCOUNT_MAX; int error; - error = mb_cache_entry_create(ext4_mb_cache, GFP_NOFS, hash, + if (!ea_block_cache) + return; + error = mb_cache_entry_create(ea_block_cache, GFP_NOFS, hash, bh->b_blocknr, reusable); if (error) { if (error == -EBUSY) @@ -1655,11 +2939,11 @@ ext4_xattr_cmp(struct ext4_xattr_header *header1, entry1->e_name_index != entry2->e_name_index || entry1->e_name_len != entry2->e_name_len || entry1->e_value_size != entry2->e_value_size || + entry1->e_value_inum != entry2->e_value_inum || memcmp(entry1->e_name, entry2->e_name, entry1->e_name_len)) return 1; - if (entry1->e_value_block != 0 || entry2->e_value_block != 0) - return -EFSCORRUPTED; - if (memcmp((char *)header1 + le16_to_cpu(entry1->e_value_offs), + if (!entry1->e_value_inum && + memcmp((char *)header1 + le16_to_cpu(entry1->e_value_offs), (char *)header2 + le16_to_cpu(entry2->e_value_offs), le32_to_cpu(entry1->e_value_size))) return 1; @@ -1673,7 +2957,7 @@ ext4_xattr_cmp(struct ext4_xattr_header *header1, } /* - * ext4_xattr_cache_find() + * ext4_xattr_block_cache_find() * * Find an identical extended attribute block. * @@ -1681,30 +2965,33 @@ ext4_xattr_cmp(struct ext4_xattr_header *header1, * not found or an error occurred. */ static struct buffer_head * -ext4_xattr_cache_find(struct inode *inode, struct ext4_xattr_header *header, - struct mb_cache_entry **pce) +ext4_xattr_block_cache_find(struct inode *inode, + struct ext4_xattr_header *header, + struct mb_cache_entry **pce) { __u32 hash = le32_to_cpu(header->h_hash); struct mb_cache_entry *ce; - struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode); + struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode); + if (!ea_block_cache) + return NULL; if (!header->h_hash) return NULL; /* never share */ ea_idebug(inode, "looking for cached blocks [%x]", (int)hash); - ce = mb_cache_entry_find_first(ext4_mb_cache, hash); + ce = mb_cache_entry_find_first(ea_block_cache, hash); while (ce) { struct buffer_head *bh; - bh = sb_bread(inode->i_sb, ce->e_block); + bh = sb_bread(inode->i_sb, ce->e_value); if (!bh) { EXT4_ERROR_INODE(inode, "block %lu read error", - (unsigned long) ce->e_block); + (unsigned long)ce->e_value); } else if (ext4_xattr_cmp(header, BHDR(bh)) == 0) { *pce = ce; return bh; } brelse(bh); - ce = mb_cache_entry_find_next(ext4_mb_cache, ce); + ce = mb_cache_entry_find_next(ea_block_cache, ce); } return NULL; } @@ -1717,30 +3004,22 @@ ext4_xattr_cache_find(struct inode *inode, struct ext4_xattr_header *header, * * Compute the hash of an extended attribute. */ -static inline void ext4_xattr_hash_entry(struct ext4_xattr_header *header, - struct ext4_xattr_entry *entry) +static __le32 ext4_xattr_hash_entry(char *name, size_t name_len, __le32 *value, + size_t value_count) { __u32 hash = 0; - char *name = entry->e_name; - int n; - for (n = 0; n < entry->e_name_len; n++) { + while (name_len--) { hash = (hash << NAME_HASH_SHIFT) ^ (hash >> (8*sizeof(hash) - NAME_HASH_SHIFT)) ^ *name++; } - - if (entry->e_value_size != 0) { - __le32 *value = (__le32 *)((char *)header + - le16_to_cpu(entry->e_value_offs)); - for (n = (le32_to_cpu(entry->e_value_size) + - EXT4_XATTR_ROUND) >> EXT4_XATTR_PAD_BITS; n; n--) { - hash = (hash << VALUE_HASH_SHIFT) ^ - (hash >> (8*sizeof(hash) - VALUE_HASH_SHIFT)) ^ - le32_to_cpu(*value++); - } + while (value_count--) { + hash = (hash << VALUE_HASH_SHIFT) ^ + (hash >> (8*sizeof(hash) - VALUE_HASH_SHIFT)) ^ + le32_to_cpu(*value++); } - entry->e_hash = cpu_to_le32(hash); + return cpu_to_le32(hash); } #undef NAME_HASH_SHIFT @@ -1753,13 +3032,11 @@ static inline void ext4_xattr_hash_entry(struct ext4_xattr_header *header, * * Re-compute the extended attribute hash value after an entry has changed. */ -static void ext4_xattr_rehash(struct ext4_xattr_header *header, - struct ext4_xattr_entry *entry) +static void ext4_xattr_rehash(struct ext4_xattr_header *header) { struct ext4_xattr_entry *here; __u32 hash = 0; - ext4_xattr_hash_entry(header, entry); here = ENTRY(header+1); while (!IS_LAST_ENTRY(here)) { if (!here->e_hash) { diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h index 099c8b670ef5..0d2dde1fa87a 100644 --- a/fs/ext4/xattr.h +++ b/fs/ext4/xattr.h @@ -44,7 +44,7 @@ struct ext4_xattr_entry { __u8 e_name_len; /* length of name */ __u8 e_name_index; /* attribute name index */ __le16 e_value_offs; /* offset in disk block of value */ - __le32 e_value_block; /* disk block attribute is stored on (n/i) */ + __le32 e_value_inum; /* inode in which the value is stored */ __le32 e_value_size; /* size of attribute value */ __le32 e_hash; /* hash value of name and value */ char e_name[0]; /* attribute name */ @@ -69,6 +69,13 @@ struct ext4_xattr_entry { EXT4_I(inode)->i_extra_isize)) #define IFIRST(hdr) ((struct ext4_xattr_entry *)((hdr)+1)) +/* + * The minimum size of EA value when you start storing it in an external inode + * size of block - size of header - size of 1 entry - 4 null bytes +*/ +#define EXT4_XATTR_MIN_LARGE_EA_SIZE(b) \ + ((b) - EXT4_XATTR_LEN(3) - sizeof(struct ext4_xattr_header) - 4) + #define BHDR(bh) ((struct ext4_xattr_header *)((bh)->b_data)) #define ENTRY(ptr) ((struct ext4_xattr_entry *)(ptr)) #define BFIRST(bh) ENTRY(BHDR(bh)+1) @@ -77,10 +84,11 @@ struct ext4_xattr_entry { #define EXT4_ZERO_XATTR_VALUE ((void *)-1) struct ext4_xattr_info { - int name_index; const char *name; const void *value; size_t value_len; + int name_index; + int in_inode; }; struct ext4_xattr_search { @@ -96,6 +104,11 @@ struct ext4_xattr_ibody_find { struct ext4_iloc iloc; }; +struct ext4_xattr_inode_array { + unsigned int count; /* # of used items in the array */ + struct inode *inodes[0]; +}; + extern const struct xattr_handler ext4_xattr_user_handler; extern const struct xattr_handler ext4_xattr_trusted_handler; extern const struct xattr_handler ext4_xattr_security_handler; @@ -139,8 +152,16 @@ extern ssize_t ext4_listxattr(struct dentry *, char *, size_t); extern int ext4_xattr_get(struct inode *, int, const char *, void *, size_t); extern int ext4_xattr_set(struct inode *, int, const char *, const void *, size_t, int); extern int ext4_xattr_set_handle(handle_t *, struct inode *, int, const char *, const void *, size_t, int); +extern int ext4_xattr_set_credits(struct inode *inode, size_t value_len, + bool is_create, int *credits); +extern int __ext4_xattr_set_credits(struct super_block *sb, struct inode *inode, + struct buffer_head *block_bh, size_t value_len, + bool is_create); -extern void ext4_xattr_delete_inode(handle_t *, struct inode *); +extern int ext4_xattr_delete_inode(handle_t *handle, struct inode *inode, + struct ext4_xattr_inode_array **array, + int extra_credits); +extern void ext4_xattr_inode_array_free(struct ext4_xattr_inode_array *array); extern int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize, struct ext4_inode *raw_inode, handle_t *handle); @@ -169,3 +190,11 @@ static inline int ext4_init_security(handle_t *handle, struct inode *inode, return 0; } #endif + +#ifdef CONFIG_LOCKDEP +extern void ext4_xattr_inode_set_class(struct inode *ea_inode); +#else +static inline void ext4_xattr_inode_set_class(struct inode *ea_inode) { } +#endif + +extern int ext4_get_inode_usage(struct inode *inode, qsize_t *usage); diff --git a/fs/mbcache.c b/fs/mbcache.c index b19be429d655..d818fd236787 100644 --- a/fs/mbcache.c +++ b/fs/mbcache.c @@ -10,13 +10,14 @@ /* * Mbcache is a simple key-value store. Keys need not be unique, however * key-value pairs are expected to be unique (we use this fact in - * mb_cache_entry_delete_block()). + * mb_cache_entry_delete()). * * Ext2 and ext4 use this cache for deduplication of extended attribute blocks. - * They use hash of a block contents as a key and block number as a value. - * That's why keys need not be unique (different xattr blocks may end up having - * the same hash). However block number always uniquely identifies a cache - * entry. + * Ext4 also uses it for deduplication of xattr values stored in inodes. + * They use hash of data as a key and provide a value that may represent a + * block or inode number. That's why keys need not be unique (hash of different + * data may be the same). However user provided value always uniquely + * identifies a cache entry. * * We provide functions for creation and removal of entries, search by key, * and a special "delete entry with given key-value pair" operation. Fixed @@ -62,15 +63,15 @@ static inline struct hlist_bl_head *mb_cache_entry_head(struct mb_cache *cache, * @cache - cache where the entry should be created * @mask - gfp mask with which the entry should be allocated * @key - key of the entry - * @block - block that contains data - * @reusable - is the block reusable by other inodes? + * @value - value of the entry + * @reusable - is the entry reusable by others? * - * Creates entry in @cache with key @key and records that data is stored in - * block @block. The function returns -EBUSY if entry with the same key - * and for the same block already exists in cache. Otherwise 0 is returned. + * Creates entry in @cache with key @key and value @value. The function returns + * -EBUSY if entry with the same key and value already exists in cache. + * Otherwise 0 is returned. */ int mb_cache_entry_create(struct mb_cache *cache, gfp_t mask, u32 key, - sector_t block, bool reusable) + u64 value, bool reusable) { struct mb_cache_entry *entry, *dup; struct hlist_bl_node *dup_node; @@ -91,12 +92,12 @@ int mb_cache_entry_create(struct mb_cache *cache, gfp_t mask, u32 key, /* One ref for hash, one ref returned */ atomic_set(&entry->e_refcnt, 1); entry->e_key = key; - entry->e_block = block; + entry->e_value = value; entry->e_reusable = reusable; head = mb_cache_entry_head(cache, key); hlist_bl_lock(head); hlist_bl_for_each_entry(dup, dup_node, head, e_hash_list) { - if (dup->e_key == key && dup->e_block == block) { + if (dup->e_key == key && dup->e_value == value) { hlist_bl_unlock(head); kmem_cache_free(mb_entry_cache, entry); return -EBUSY; @@ -187,13 +188,13 @@ struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache *cache, EXPORT_SYMBOL(mb_cache_entry_find_next); /* - * mb_cache_entry_get - get a cache entry by block number (and key) + * mb_cache_entry_get - get a cache entry by value (and key) * @cache - cache we work with - * @key - key of block number @block - * @block - block number + * @key - key + * @value - value */ struct mb_cache_entry *mb_cache_entry_get(struct mb_cache *cache, u32 key, - sector_t block) + u64 value) { struct hlist_bl_node *node; struct hlist_bl_head *head; @@ -202,7 +203,7 @@ struct mb_cache_entry *mb_cache_entry_get(struct mb_cache *cache, u32 key, head = mb_cache_entry_head(cache, key); hlist_bl_lock(head); hlist_bl_for_each_entry(entry, node, head, e_hash_list) { - if (entry->e_key == key && entry->e_block == block) { + if (entry->e_key == key && entry->e_value == value) { atomic_inc(&entry->e_refcnt); goto out; } @@ -214,15 +215,14 @@ out: } EXPORT_SYMBOL(mb_cache_entry_get); -/* mb_cache_entry_delete_block - remove information about block from cache +/* mb_cache_entry_delete - remove a cache entry * @cache - cache we work with - * @key - key of block @block - * @block - block number + * @key - key + * @value - value * - * Remove entry from cache @cache with key @key with data stored in @block. + * Remove entry from cache @cache with key @key and value @value. */ -void mb_cache_entry_delete_block(struct mb_cache *cache, u32 key, - sector_t block) +void mb_cache_entry_delete(struct mb_cache *cache, u32 key, u64 value) { struct hlist_bl_node *node; struct hlist_bl_head *head; @@ -231,7 +231,7 @@ void mb_cache_entry_delete_block(struct mb_cache *cache, u32 key, head = mb_cache_entry_head(cache, key); hlist_bl_lock(head); hlist_bl_for_each_entry(entry, node, head, e_hash_list) { - if (entry->e_key == key && entry->e_block == block) { + if (entry->e_key == key && entry->e_value == value) { /* We keep hash list reference to keep entry alive */ hlist_bl_del_init(&entry->e_hash_list); hlist_bl_unlock(head); @@ -248,7 +248,7 @@ void mb_cache_entry_delete_block(struct mb_cache *cache, u32 key, } hlist_bl_unlock(head); } -EXPORT_SYMBOL(mb_cache_entry_delete_block); +EXPORT_SYMBOL(mb_cache_entry_delete); /* mb_cache_entry_touch - cache entry got used * @cache - cache the entry belongs to diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c index 48813aeaab80..53a17496c5c5 100644 --- a/fs/quota/dquot.c +++ b/fs/quota/dquot.c @@ -1910,6 +1910,7 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to) { qsize_t space, cur_space; qsize_t rsv_space = 0; + qsize_t inode_usage = 1; struct dquot *transfer_from[MAXQUOTAS] = {}; int cnt, ret = 0; char is_valid[MAXQUOTAS] = {}; @@ -1919,6 +1920,13 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to) if (IS_NOQUOTA(inode)) return 0; + + if (inode->i_sb->dq_op->get_inode_usage) { + ret = inode->i_sb->dq_op->get_inode_usage(inode, &inode_usage); + if (ret) + return ret; + } + /* Initialize the arrays */ for (cnt = 0; cnt < MAXQUOTAS; cnt++) { warn_to[cnt].w_type = QUOTA_NL_NOWARN; @@ -1946,7 +1954,7 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to) continue; is_valid[cnt] = 1; transfer_from[cnt] = i_dquot(inode)[cnt]; - ret = check_idq(transfer_to[cnt], 1, &warn_to[cnt]); + ret = check_idq(transfer_to[cnt], inode_usage, &warn_to[cnt]); if (ret) goto over_quota; ret = check_bdq(transfer_to[cnt], space, 0, &warn_to[cnt]); @@ -1963,7 +1971,7 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to) /* Due to IO error we might not have transfer_from[] structure */ if (transfer_from[cnt]) { int wtype; - wtype = info_idq_free(transfer_from[cnt], 1); + wtype = info_idq_free(transfer_from[cnt], inode_usage); if (wtype != QUOTA_NL_NOWARN) prepare_warning(&warn_from_inodes[cnt], transfer_from[cnt], wtype); @@ -1971,13 +1979,13 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to) if (wtype != QUOTA_NL_NOWARN) prepare_warning(&warn_from_space[cnt], transfer_from[cnt], wtype); - dquot_decr_inodes(transfer_from[cnt], 1); + dquot_decr_inodes(transfer_from[cnt], inode_usage); dquot_decr_space(transfer_from[cnt], cur_space); dquot_free_reserved_space(transfer_from[cnt], rsv_space); } - dquot_incr_inodes(transfer_to[cnt], 1); + dquot_incr_inodes(transfer_to[cnt], inode_usage); dquot_incr_space(transfer_to[cnt], cur_space); dquot_resv_space(transfer_to[cnt], rsv_space); diff --git a/include/linux/fscrypt_common.h b/include/linux/fscrypt_common.h index e3e1208e0f54..97f738628b36 100644 --- a/include/linux/fscrypt_common.h +++ b/include/linux/fscrypt_common.h @@ -83,6 +83,9 @@ struct fscrypt_operations { unsigned (*max_namelen)(struct inode *); }; +/* Maximum value for the third parameter of fscrypt_operations.set_context(). */ +#define FSCRYPT_SET_CONTEXT_MAX_SIZE 28 + static inline bool fscrypt_dummy_context_enabled(struct inode *inode) { if (inode->i_sb->s_cop->dummy_context && diff --git a/include/linux/mbcache.h b/include/linux/mbcache.h index 86c9a8b480c5..e1bc73414983 100644 --- a/include/linux/mbcache.h +++ b/include/linux/mbcache.h @@ -19,15 +19,15 @@ struct mb_cache_entry { u32 e_key; u32 e_referenced:1; u32 e_reusable:1; - /* Block number of hashed block - stable during lifetime of the entry */ - sector_t e_block; + /* User provided value - stable during lifetime of the entry */ + u64 e_value; }; struct mb_cache *mb_cache_create(int bucket_bits); void mb_cache_destroy(struct mb_cache *cache); int mb_cache_entry_create(struct mb_cache *cache, gfp_t mask, u32 key, - sector_t block, bool reusable); + u64 value, bool reusable); void __mb_cache_entry_free(struct mb_cache_entry *entry); static inline int mb_cache_entry_put(struct mb_cache *cache, struct mb_cache_entry *entry) @@ -38,10 +38,9 @@ static inline int mb_cache_entry_put(struct mb_cache *cache, return 1; } -void mb_cache_entry_delete_block(struct mb_cache *cache, u32 key, - sector_t block); +void mb_cache_entry_delete(struct mb_cache *cache, u32 key, u64 value); struct mb_cache_entry *mb_cache_entry_get(struct mb_cache *cache, u32 key, - sector_t block); + u64 value); struct mb_cache_entry *mb_cache_entry_find_first(struct mb_cache *cache, u32 key); struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache *cache, diff --git a/include/linux/quota.h b/include/linux/quota.h index 3434eef2a5aa..bfd077ca6ac3 100644 --- a/include/linux/quota.h +++ b/include/linux/quota.h @@ -332,6 +332,8 @@ struct dquot_operations { * quota code only */ qsize_t *(*get_reserved_space) (struct inode *); int (*get_projid) (struct inode *, kprojid_t *);/* Get project ID */ + /* Get number of inodes that were charged for a given inode */ + int (*get_inode_usage) (struct inode *, qsize_t *); /* Get next ID with active quota structure */ int (*get_next_id) (struct super_block *sb, struct kqid *qid); };