From: Jaegeuk Kim Date: Mon, 30 Mar 2015 22:07:16 +0000 (-0700) Subject: f2fs: add F2FS_INLINE_DOTS to recover missing dot dentries X-Git-Tag: v4.1-rc1~87^2~7 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=510022a85839a8409d1e6a519bb86ce71a84f30a;p=karo-tx-linux.git f2fs: add F2FS_INLINE_DOTS to recover missing dot dentries If f2fs was corrupted with missing dot dentries, it needs to recover them after fsck.f2fs detection. The underlying precedure is: 1. The fsck.f2fs remains F2FS_INLINE_DOTS flag in directory inode, if it detects missing dot dentries. 2. When f2fs looks up the corrupted directory, it triggers f2fs_add_link with proper inode numbers and their dot and dotdot names. 3. Once f2fs recovers the directory without errors, it removes F2FS_INLINE_DOTS finally. Signed-off-by: Jaegeuk Kim --- diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c index 4e59c8219dde..906b5876dc27 100644 --- a/fs/f2fs/dir.c +++ b/fs/f2fs/dir.c @@ -59,9 +59,8 @@ static unsigned char f2fs_type_by_mode[S_IFMT >> S_SHIFT] = { [S_IFLNK >> S_SHIFT] = F2FS_FT_SYMLINK, }; -void set_de_type(struct f2fs_dir_entry *de, struct inode *inode) +void set_de_type(struct f2fs_dir_entry *de, umode_t mode) { - umode_t mode = inode->i_mode; de->file_type = f2fs_type_by_mode[(mode & S_IFMT) >> S_SHIFT]; } @@ -282,7 +281,7 @@ void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de, lock_page(page); f2fs_wait_on_page_writeback(page, type); de->ino = cpu_to_le32(inode->i_ino); - set_de_type(de, inode); + set_de_type(de, inode->i_mode); f2fs_dentry_kunmap(dir, page); set_page_dirty(page); dir->i_mtime = dir->i_ctime = CURRENT_TIME; @@ -328,14 +327,14 @@ void do_make_empty_dir(struct inode *inode, struct inode *parent, de->hash_code = 0; de->ino = cpu_to_le32(inode->i_ino); memcpy(d->filename[0], ".", 1); - set_de_type(de, inode); + set_de_type(de, inode->i_mode); de = &d->dentry[1]; de->hash_code = 0; de->name_len = cpu_to_le16(2); de->ino = cpu_to_le32(parent->i_ino); memcpy(d->filename[1], "..", 2); - set_de_type(de, inode); + set_de_type(de, inode->i_mode); test_and_set_bit_le(0, (void *)d->bitmap); test_and_set_bit_le(1, (void *)d->bitmap); @@ -432,7 +431,7 @@ error: void update_parent_metadata(struct inode *dir, struct inode *inode, unsigned int current_depth) { - if (is_inode_flag_set(F2FS_I(inode), FI_NEW_INODE)) { + if (inode && is_inode_flag_set(F2FS_I(inode), FI_NEW_INODE)) { if (S_ISDIR(inode->i_mode)) { inc_nlink(dir); set_inode_flag(F2FS_I(dir), FI_UPDATE_DIR); @@ -447,7 +446,7 @@ void update_parent_metadata(struct inode *dir, struct inode *inode, set_inode_flag(F2FS_I(dir), FI_UPDATE_DIR); } - if (is_inode_flag_set(F2FS_I(inode), FI_INC_LINK)) + if (inode && is_inode_flag_set(F2FS_I(inode), FI_INC_LINK)) clear_inode_flag(F2FS_I(inode), FI_INC_LINK); } @@ -471,7 +470,7 @@ next: goto next; } -void f2fs_update_dentry(struct inode *inode, struct f2fs_dentry_ptr *d, +void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *d, const struct qstr *name, f2fs_hash_t name_hash, unsigned int bit_pos) { @@ -483,8 +482,8 @@ void f2fs_update_dentry(struct inode *inode, struct f2fs_dentry_ptr *d, de->hash_code = name_hash; de->name_len = cpu_to_le16(name->len); memcpy(d->filename[bit_pos], name->name, name->len); - de->ino = cpu_to_le32(inode->i_ino); - set_de_type(de, inode); + de->ino = cpu_to_le32(ino); + set_de_type(de, mode); for (i = 0; i < slots; i++) test_and_set_bit_le(bit_pos + i, (void *)d->bitmap); } @@ -494,7 +493,7 @@ void f2fs_update_dentry(struct inode *inode, struct f2fs_dentry_ptr *d, * f2fs_unlock_op(). */ int __f2fs_add_link(struct inode *dir, const struct qstr *name, - struct inode *inode) + struct inode *inode, nid_t ino, umode_t mode) { unsigned int bit_pos; unsigned int level; @@ -507,11 +506,11 @@ int __f2fs_add_link(struct inode *dir, const struct qstr *name, struct f2fs_dentry_block *dentry_blk = NULL; struct f2fs_dentry_ptr d; int slots = GET_DENTRY_SLOTS(namelen); - struct page *page; + struct page *page = NULL; int err = 0; if (f2fs_has_inline_dentry(dir)) { - err = f2fs_add_inline_entry(dir, name, inode); + err = f2fs_add_inline_entry(dir, name, inode, ino, mode); if (!err || err != -EAGAIN) return err; else @@ -561,26 +560,31 @@ start: add_dentry: f2fs_wait_on_page_writeback(dentry_page, DATA); - down_write(&F2FS_I(inode)->i_sem); - page = init_inode_metadata(inode, dir, name, NULL); - if (IS_ERR(page)) { - err = PTR_ERR(page); - goto fail; + if (inode) { + down_write(&F2FS_I(inode)->i_sem); + page = init_inode_metadata(inode, dir, name, NULL); + if (IS_ERR(page)) { + err = PTR_ERR(page); + goto fail; + } } make_dentry_ptr(&d, (void *)dentry_blk, 1); - f2fs_update_dentry(inode, &d, name, dentry_hash, bit_pos); + f2fs_update_dentry(ino, mode, &d, name, dentry_hash, bit_pos); set_page_dirty(dentry_page); - /* we don't need to mark_inode_dirty now */ - F2FS_I(inode)->i_pino = dir->i_ino; - update_inode(inode, page); - f2fs_put_page(page, 1); + if (inode) { + /* we don't need to mark_inode_dirty now */ + F2FS_I(inode)->i_pino = dir->i_ino; + update_inode(inode, page); + f2fs_put_page(page, 1); + } update_parent_metadata(dir, inode, current_depth); fail: - up_write(&F2FS_I(inode)->i_sem); + if (inode) + up_write(&F2FS_I(inode)->i_sem); if (is_inode_flag_set(F2FS_I(dir), FI_UPDATE_DIR)) { update_inode_page(dir); diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 0be198339c3b..053361ace0ec 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1246,6 +1246,7 @@ enum { FI_FIRST_BLOCK_WRITTEN, /* indicate #0 data block was written */ FI_DROP_CACHE, /* drop dirty page cache */ FI_DATA_EXIST, /* indicate data exists */ + FI_INLINE_DOTS, /* indicate inline dot dentries */ }; static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag) @@ -1282,6 +1283,8 @@ static inline void get_inline_info(struct f2fs_inode_info *fi, set_inode_flag(fi, FI_INLINE_DENTRY); if (ri->i_inline & F2FS_DATA_EXIST) set_inode_flag(fi, FI_DATA_EXIST); + if (ri->i_inline & F2FS_INLINE_DOTS) + set_inode_flag(fi, FI_INLINE_DOTS); } static inline void set_raw_inline(struct f2fs_inode_info *fi, @@ -1297,6 +1300,8 @@ static inline void set_raw_inline(struct f2fs_inode_info *fi, ri->i_inline |= F2FS_INLINE_DENTRY; if (is_inode_flag_set(fi, FI_DATA_EXIST)) ri->i_inline |= F2FS_DATA_EXIST; + if (is_inode_flag_set(fi, FI_INLINE_DOTS)) + ri->i_inline |= F2FS_INLINE_DOTS; } static inline int f2fs_has_inline_xattr(struct inode *inode) @@ -1342,6 +1347,11 @@ static inline int f2fs_exist_data(struct inode *inode) return is_inode_flag_set(F2FS_I(inode), FI_DATA_EXIST); } +static inline int f2fs_has_inline_dots(struct inode *inode) +{ + return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DOTS); +} + static inline bool f2fs_is_atomic_file(struct inode *inode) { return is_inode_flag_set(F2FS_I(inode), FI_ATOMIC_FILE); @@ -1440,7 +1450,7 @@ struct dentry *f2fs_get_parent(struct dentry *child); * dir.c */ extern unsigned char f2fs_filetype_table[F2FS_FT_MAX]; -void set_de_type(struct f2fs_dir_entry *, struct inode *); +void set_de_type(struct f2fs_dir_entry *, umode_t); struct f2fs_dir_entry *find_target_dentry(struct qstr *, int *, struct f2fs_dentry_ptr *); bool f2fs_fill_dentries(struct dir_context *, struct f2fs_dentry_ptr *, @@ -1459,9 +1469,10 @@ ino_t f2fs_inode_by_name(struct inode *, struct qstr *); void f2fs_set_link(struct inode *, struct f2fs_dir_entry *, struct page *, struct inode *); int update_dent_inode(struct inode *, const struct qstr *); -void f2fs_update_dentry(struct inode *, struct f2fs_dentry_ptr *, +void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *, const struct qstr *, f2fs_hash_t , unsigned int); -int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *); +int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *, nid_t, + umode_t); void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *, struct inode *); int f2fs_do_tmpfile(struct inode *, struct inode *); @@ -1471,7 +1482,7 @@ bool f2fs_empty_dir(struct inode *); static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode) { return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name, - inode); + inode, inode->i_ino, inode->i_mode); } /* @@ -1792,7 +1803,8 @@ struct f2fs_dir_entry *find_in_inline_dir(struct inode *, struct qstr *, struct page **); struct f2fs_dir_entry *f2fs_parent_inline_dir(struct inode *, struct page **); int make_empty_inline_dir(struct inode *inode, struct inode *, struct page *); -int f2fs_add_inline_entry(struct inode *, const struct qstr *, struct inode *); +int f2fs_add_inline_entry(struct inode *, const struct qstr *, struct inode *, + nid_t, umode_t); void f2fs_delete_inline_entry(struct f2fs_dir_entry *, struct page *, struct inode *, struct inode *); bool f2fs_empty_inline_dir(struct inode *); diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c index 8241a87046c3..8140e4f0e538 100644 --- a/fs/f2fs/inline.c +++ b/fs/f2fs/inline.c @@ -390,7 +390,7 @@ out: } int f2fs_add_inline_entry(struct inode *dir, const struct qstr *name, - struct inode *inode) + struct inode *inode, nid_t ino, umode_t mode) { struct f2fs_sb_info *sbi = F2FS_I_SB(dir); struct page *ipage; @@ -400,7 +400,7 @@ int f2fs_add_inline_entry(struct inode *dir, const struct qstr *name, struct f2fs_inline_dentry *dentry_blk = NULL; struct f2fs_dentry_ptr d; int slots = GET_DENTRY_SLOTS(namelen); - struct page *page; + struct page *page = NULL; int err = 0; ipage = get_node_page(sbi, dir->i_ino); @@ -417,29 +417,34 @@ int f2fs_add_inline_entry(struct inode *dir, const struct qstr *name, goto out; } - down_write(&F2FS_I(inode)->i_sem); - page = init_inode_metadata(inode, dir, name, ipage); - if (IS_ERR(page)) { - err = PTR_ERR(page); - goto fail; + if (inode) { + down_write(&F2FS_I(inode)->i_sem); + page = init_inode_metadata(inode, dir, name, ipage); + if (IS_ERR(page)) { + err = PTR_ERR(page); + goto fail; + } } f2fs_wait_on_page_writeback(ipage, NODE); name_hash = f2fs_dentry_hash(name); make_dentry_ptr(&d, (void *)dentry_blk, 2); - f2fs_update_dentry(inode, &d, name, name_hash, bit_pos); + f2fs_update_dentry(ino, mode, &d, name, name_hash, bit_pos); set_page_dirty(ipage); /* we don't need to mark_inode_dirty now */ - F2FS_I(inode)->i_pino = dir->i_ino; - update_inode(inode, page); - f2fs_put_page(page, 1); + if (inode) { + F2FS_I(inode)->i_pino = dir->i_ino; + update_inode(inode, page); + f2fs_put_page(page, 1); + } update_parent_metadata(dir, inode, 0); fail: - up_write(&F2FS_I(inode)->i_sem); + if (inode) + up_write(&F2FS_I(inode)->i_sem); if (is_inode_flag_set(F2FS_I(dir), FI_UPDATE_DIR)) { update_inode(dir, ipage); diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c index 1e2ae21bd6b6..8055e30eb14d 100644 --- a/fs/f2fs/namei.c +++ b/fs/f2fs/namei.c @@ -187,6 +187,44 @@ struct dentry *f2fs_get_parent(struct dentry *child) return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino)); } +static int __recover_dot_dentries(struct inode *dir, nid_t pino) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(dir); + struct qstr dot = QSTR_INIT(".", 1); + struct qstr dotdot = QSTR_INIT("..", 2); + struct f2fs_dir_entry *de; + struct page *page; + int err = 0; + + f2fs_lock_op(sbi); + + de = f2fs_find_entry(dir, &dot, &page); + if (de) { + f2fs_dentry_kunmap(dir, page); + f2fs_put_page(page, 0); + } else { + err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); + if (err) + goto out; + } + + de = f2fs_find_entry(dir, &dotdot, &page); + if (de) { + f2fs_dentry_kunmap(dir, page); + f2fs_put_page(page, 0); + } else { + err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); + } +out: + if (!err) { + clear_inode_flag(F2FS_I(dir), FI_INLINE_DOTS); + mark_inode_dirty(dir); + } + + f2fs_unlock_op(sbi); + return err; +} + static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) { @@ -206,6 +244,16 @@ static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, inode = f2fs_iget(dir->i_sb, ino); if (IS_ERR(inode)) return ERR_CAST(inode); + + if (f2fs_has_inline_dots(inode)) { + int err; + + err = __recover_dot_dentries(inode, dir->i_ino); + if (err) { + iget_failed(inode); + return ERR_PTR(err); + } + } } return d_splice_alias(inode, dentry); diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c index c69de88a6453..679c465e9def 100644 --- a/fs/f2fs/recovery.c +++ b/fs/f2fs/recovery.c @@ -115,7 +115,7 @@ retry: iput(einode); goto retry; } - err = __f2fs_add_link(dir, &name, inode); + err = __f2fs_add_link(dir, &name, inode, inode->i_ino, inode->i_mode); if (err) goto out_err; diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h index 502f28cfb78e..591f8c3ef410 100644 --- a/include/linux/f2fs_fs.h +++ b/include/linux/f2fs_fs.h @@ -178,6 +178,7 @@ struct f2fs_extent { #define F2FS_INLINE_DATA 0x02 /* file inline data flag */ #define F2FS_INLINE_DENTRY 0x04 /* file inline dentry flag */ #define F2FS_DATA_EXIST 0x08 /* file inline data exist flag */ +#define F2FS_INLINE_DOTS 0x10 /* file having implicit dot dentries */ #define MAX_INLINE_DATA (sizeof(__le32) * (DEF_ADDRS_PER_INODE - \ F2FS_INLINE_XATTR_ADDRS - 1))