diff options
Diffstat (limited to 'fs/ext4/extents.c')
| -rw-r--r-- | fs/ext4/extents.c | 98 |
1 files changed, 88 insertions, 10 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 92266a2da7d6..fb0f99dc8c22 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -2315,6 +2315,52 @@ static int ext4_fill_fiemap_extents(struct inode *inode, return err; } +static int ext4_fill_es_cache_info(struct inode *inode, + ext4_lblk_t block, ext4_lblk_t num, + struct fiemap_extent_info *fieinfo) +{ + ext4_lblk_t next, end = block + num - 1; + struct extent_status es; + unsigned char blksize_bits = inode->i_sb->s_blocksize_bits; + unsigned int flags; + int err; + + while (block <= end) { + next = 0; + flags = 0; + if (!ext4_es_lookup_extent(inode, block, &next, &es)) + break; + if (ext4_es_is_unwritten(&es)) + flags |= FIEMAP_EXTENT_UNWRITTEN; + if (ext4_es_is_delayed(&es)) + flags |= (FIEMAP_EXTENT_DELALLOC | + FIEMAP_EXTENT_UNKNOWN); + if (ext4_es_is_hole(&es)) + flags |= EXT4_FIEMAP_EXTENT_HOLE; + if (next == 0) + flags |= FIEMAP_EXTENT_LAST; + if (flags & (FIEMAP_EXTENT_DELALLOC| + EXT4_FIEMAP_EXTENT_HOLE)) + es.es_pblk = 0; + else + es.es_pblk = ext4_es_pblock(&es); + err = fiemap_fill_next_extent(fieinfo, + (__u64)es.es_lblk << blksize_bits, + (__u64)es.es_pblk << blksize_bits, + (__u64)es.es_len << blksize_bits, + flags); + if (next == 0) + break; + block = next; + if (err < 0) + return err; + if (err == 1) + return 0; + } + return 0; +} + + /* * ext4_ext_determine_hole - determine hole around given block * @inode: inode we lookup in @@ -3813,8 +3859,8 @@ static int ext4_convert_unwritten_extents_endio(handle_t *handle, * illegal. */ if (ee_block != map->m_lblk || ee_len > map->m_len) { -#ifdef EXT4_DEBUG - ext4_warning("Inode (%ld) finished: extent logical block %llu," +#ifdef CONFIG_EXT4_DEBUG + ext4_warning(inode->i_sb, "Inode (%ld) finished: extent logical block %llu," " len %u; IO logical block %llu, len %u", inode->i_ino, (unsigned long long)ee_block, ee_len, (unsigned long long)map->m_lblk, map->m_len); @@ -5017,8 +5063,6 @@ static int ext4_find_delayed_extent(struct inode *inode, return next_del; } -/* fiemap flags we can handle specified here */ -#define EXT4_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR) static int ext4_xattr_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo) @@ -5055,10 +5099,16 @@ static int ext4_xattr_fiemap(struct inode *inode, return (error < 0 ? error : 0); } -int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, - __u64 start, __u64 len) +static int _ext4_fiemap(struct inode *inode, + struct fiemap_extent_info *fieinfo, + __u64 start, __u64 len, + int (*fill)(struct inode *, ext4_lblk_t, + ext4_lblk_t, + struct fiemap_extent_info *)) { ext4_lblk_t start_blk; + u32 ext4_fiemap_flags = FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR; + int error = 0; if (ext4_has_inline_data(inode)) { @@ -5075,14 +5125,18 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, error = ext4_ext_precache(inode); if (error) return error; + fieinfo->fi_flags &= ~FIEMAP_FLAG_CACHE; } /* fallback to generic here if not in extents fmt */ - if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) + if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) && + fill == ext4_fill_fiemap_extents) return generic_block_fiemap(inode, fieinfo, start, len, ext4_get_block); - if (fiemap_check_flags(fieinfo, EXT4_FIEMAP_FLAGS)) + if (fill == ext4_fill_es_cache_info) + ext4_fiemap_flags &= FIEMAP_FLAG_XATTR; + if (fiemap_check_flags(fieinfo, ext4_fiemap_flags)) return -EBADR; if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) { @@ -5101,12 +5155,36 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, * Walk the extent tree gathering extent information * and pushing extents back to the user. */ - error = ext4_fill_fiemap_extents(inode, start_blk, - len_blks, fieinfo); + error = fill(inode, start_blk, len_blks, fieinfo); } return error; } +int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, + __u64 start, __u64 len) +{ + return _ext4_fiemap(inode, fieinfo, start, len, + ext4_fill_fiemap_extents); +} + +int ext4_get_es_cache(struct inode *inode, struct fiemap_extent_info *fieinfo, + __u64 start, __u64 len) +{ + if (ext4_has_inline_data(inode)) { + int has_inline; + + down_read(&EXT4_I(inode)->xattr_sem); + has_inline = ext4_has_inline_data(inode); + up_read(&EXT4_I(inode)->xattr_sem); + if (has_inline) + return 0; + } + + return _ext4_fiemap(inode, fieinfo, start, len, + ext4_fill_es_cache_info); +} + + /* * ext4_access_path: * Function to access the path buffer for marking it dirty. |