From: Tao Ma Subject: [PATCH V3 14/21] ext4: let ext4_find_entry handle inline data. Date: Sun, 18 Dec 2011 22:24:31 +0800 Message-ID: <1324218278-2460-14-git-send-email-tm@tao.ma> References: <4EEDF6B1.7050206@tao.ma> <1324218278-2460-1-git-send-email-tm@tao.ma> Cc: adilger@dilger.ca, tytso@mit.edu, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org To: linux-ext4@vger.kernel.org Return-path: In-Reply-To: <1324218278-2460-1-git-send-email-tm@tao.ma> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org From: Tao Ma Create a new ext4_find_inline_entry to handle the case of inline data. Signed-off-by: Tao Ma --- fs/ext4/inline.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ fs/ext4/namei.c | 10 +++++++++- fs/ext4/xattr.h | 12 ++++++++++++ 3 files changed, 68 insertions(+), 1 deletions(-) diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c index 0a41d64..7e80416 100644 --- a/fs/ext4/inline.c +++ b/fs/ext4/inline.c @@ -1327,6 +1327,53 @@ out: return ret; } +struct buffer_head *ext4_find_inline_entry(struct inode *dir, + const struct qstr *d_name, + struct ext4_dir_entry_2 **res_dir, + int *has_inline_data) +{ + int ret; + struct ext4_iloc iloc; + void *inline_start; + int inline_size; + + if (ext4_get_inode_loc(dir, &iloc)) + return NULL; + + down_read(&EXT4_I(dir)->xattr_sem); + if (!ext4_has_inline_data(dir)) { + *has_inline_data = 0; + goto out; + } + + inline_start = ext4_raw_inode(&iloc)->i_block; + inline_size = EXT4_MIN_INLINE_DATA_SIZE; + ret = search_dir(iloc.bh, inline_start, inline_size, + dir, d_name, 0, res_dir); + if (ret == 1) + goto out_find; + if (ret < 0) + goto out; + + if (ext4_get_inline_size(dir) == EXT4_MIN_INLINE_DATA_SIZE) + goto out; + + inline_start = ext4_get_inline_xattr_pos(dir, &iloc); + inline_size = ext4_get_inline_size(dir) - EXT4_MIN_INLINE_DATA_SIZE; + + ret = search_dir(iloc.bh, inline_start, inline_size, + dir, d_name, 0, res_dir); + if (ret == 1) + goto out_find; + +out: + brelse(iloc.bh); + iloc.bh = NULL; +out_find: + up_read(&EXT4_I(dir)->xattr_sem); + return iloc.bh; +} + int ext4_destroy_inline_data(handle_t *handle, struct inode *inode) { int ret; diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 6e97dd2..92f7b67 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -844,7 +844,6 @@ static inline int search_dirblock(struct buffer_head *bh, d_name, offset, res_dir); } - /* * ext4_find_entry() * @@ -879,6 +878,15 @@ static struct buffer_head * ext4_find_entry (struct inode *dir, namelen = d_name->len; if (namelen > EXT4_NAME_LEN) return NULL; + + if (ext4_has_inline_data(dir)) { + int has_inline_data = 1; + ret = ext4_find_inline_entry(dir, d_name, res_dir, + &has_inline_data); + if (has_inline_data) + return ret; + } + if ((namelen <= 2) && (name[0] == '.') && (name[1] == '.' || name[1] == '\0')) { /* diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h index e9e23ba..45f3ce9 100644 --- a/fs/ext4/xattr.h +++ b/fs/ext4/xattr.h @@ -168,6 +168,10 @@ extern int ext4_try_create_inline_dir(handle_t *handle, struct inode *inode); extern int ext4_read_inline_dir(struct file *filp, void *dirent, filldir_t filldir); +extern struct buffer_head *ext4_find_inline_entry(struct inode *dir, + const struct qstr *d_name, + struct ext4_dir_entry_2 **res_dir, + int *has_inline_data); # else /* CONFIG_EXT4_FS_XATTR */ static inline int @@ -350,6 +354,14 @@ static inline int ext4_read_inline_dir(struct file *filp, { return 0; } + +struct buffer_head *ext4_find_inline_entry(struct inode *dir, + const struct qstr *d_name, + struct ext4_dir_entry_2 **res_dir, + int *has_inline_data) +{ + return NULL; +} # endif /* CONFIG_EXT4_FS_XATTR */ #ifdef CONFIG_EXT4_FS_SECURITY -- 1.7.0.4