[PATCH V4 21/22] ext4: let ext4_truncate handle inline data correctly.
From: Tao Ma <hidden>
Date: 2012-02-20 07:01:55
Also in:
linux-fsdevel
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds
From: Robin Dong <redacted> Signed-off-by: Robin Dong <redacted> Signed-off-by: Tao Ma <redacted> --- fs/ext4/inline.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/ext4/inode.c | 5 +++ fs/ext4/xattr.h | 8 ++++++ 3 files changed, 87 insertions(+), 0 deletions(-)
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index b8576be..0d32a39 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c@@ -1651,3 +1651,77 @@ out: brelse(iloc.bh); return error; } + +void ext4_inline_data_truncate(struct inode *inode) +{ + handle_t *handle; + int inline_size = ext4_get_inline_size(inode); + size_t isize = i_size_read(inode); + int needed_blocks, value_len; + void *value = NULL; + struct ext4_xattr_ibody_find is = { + .s = { .not_found = -ENODATA, }, + }; + struct ext4_xattr_info i = { + .name_index = EXT4_XATTR_INDEX_SYSTEM_DATA, + .name = EXT4_XATTR_SYSTEM_DATA_NAME, + }; + + needed_blocks = ext4_writepage_trans_blocks(inode); + handle = ext4_journal_start(inode, needed_blocks); + if (IS_ERR(handle)) + return; + + if (ext4_orphan_add(handle, inode)) + goto out; + + EXT4_I(inode)->i_disksize = inode->i_size; + + if (isize < ext4_get_max_inline_size(inode)) { + if (ext4_get_inode_loc(inode, &is.iloc)) + goto out; + + if (isize < EXT4_MIN_INLINE_DATA_SIZE) + memset(ext4_raw_inode(&is.iloc)->i_block + isize, 0, + EXT4_MIN_INLINE_DATA_SIZE - isize); + if (inline_size > EXT4_MIN_INLINE_DATA_SIZE && + isize < inline_size) { + if (ext4_xattr_ibody_find(inode, &i, &is)) + goto out_bh; + + BUG_ON(!is.s.not_found); + + value_len = le32_to_cpu(is.s.here->e_value_size); + value = kmalloc(value_len, GFP_NOFS); + + if (ext4_xattr_ibody_get(inode, i.name_index, i.name, + value, value_len)) + goto out_bh; + + i.value = value; + i.value_len = isize - EXT4_MIN_INLINE_DATA_SIZE; + if (ext4_xattr_ibody_inline_set(handle, inode, &i, &is)) + goto out_bh; + } + if (isize < inline_size) + EXT4_I(inode)->i_inline_size = isize < + EXT4_MIN_INLINE_DATA_SIZE ? + EXT4_MIN_INLINE_DATA_SIZE : isize; +out_bh: + if (value) + kfree(value); + brelse(is.iloc.bh); + } else + ext4_convert_inline_data_to_extent(inode->i_mapping, inode, 0); + +out: + if (inode->i_nlink) + ext4_orphan_del(handle, inode); + + inode->i_mtime = inode->i_ctime = ext4_current_time(inode); + ext4_mark_inode_dirty(handle, inode); + if (IS_SYNC(inode)) + ext4_handle_sync(handle); + + ext4_journal_stop(handle); +}
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 549af8f..805709b 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c@@ -3496,6 +3496,11 @@ void ext4_truncate(struct inode *inode) if (inode->i_size == 0 && !test_opt(inode->i_sb, NO_AUTO_DA_ALLOC)) ext4_set_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE); + if (ext4_has_inline_data(inode)) { + ext4_inline_data_truncate(inode); + return; + } + if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) ext4_ext_truncate(inode); else
diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index d74df33..4f12d02 100644
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h@@ -187,6 +187,8 @@ extern int ext4_inline_data_fiemap(struct inode *inode, extern int ext4_try_to_evict_inline_data(handle_t *handle, struct inode *inode, int needed); +extern void ext4_inline_data_truncate(struct inode *inode); + # else /* CONFIG_EXT4_FS_XATTR */ static inline int
@@ -404,6 +406,12 @@ static inline int ext4_inline_data_fiemap(struct inode *inode, { return 0; } + +static inline void ext4_inline_data_truncate(struct inode *inode) +{ + return; +} + # endif /* CONFIG_EXT4_FS_XATTR */ #ifdef CONFIG_EXT4_FS_SECURITY
--
1.7.0.4