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f2fs: be aware of extent beyond EOF in fiemap

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f2fs can support fallocating blocks beyond file size without changing the
size, but ->fiemap of f2fs was restricted and can't detect these extents
fallocated past EOF, now relieve the restriction.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2016-10-11 22:57:04 +08:00 committed by Jaegeuk Kim
parent 6f2d8ed654
commit 58736fa60f
1 changed files with 4 additions and 14 deletions
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18
fs/f2fs/data.c
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@ -886,7 +886,6 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
struct buffer_head map_bh; struct buffer_head map_bh;
sector_t start_blk, last_blk; sector_t start_blk, last_blk;
pgoff_t next_pgofs; pgoff_t next_pgofs;
loff_t isize;
u64 logical = 0, phys = 0, size = 0; u64 logical = 0, phys = 0, size = 0;
u32 flags = 0; u32 flags = 0;
int ret = 0; int ret = 0;
@ -903,13 +902,6 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
inode_lock(inode); inode_lock(inode);
isize = i_size_read(inode);
if (start >= isize)
goto out;
if (start + len > isize)
len = isize - start;
if (logical_to_blk(inode, len) == 0) if (logical_to_blk(inode, len) == 0)
len = blk_to_logical(inode, 1); len = blk_to_logical(inode, 1);
@ -928,13 +920,11 @@ next:
/* HOLE */ /* HOLE */
if (!buffer_mapped(&map_bh)) { if (!buffer_mapped(&map_bh)) {
start_blk = next_pgofs; start_blk = next_pgofs;
/* Go through holes util pass the EOF */
if (blk_to_logical(inode, start_blk) < isize) if (blk_to_logical(inode, start_blk) < blk_to_logical(inode,
F2FS_I_SB(inode)->max_file_blocks))
goto prep_next; goto prep_next;
/* Found a hole beyond isize means no more extents.
* Note that the premise is that filesystems don't
* punch holes beyond isize and keep size unchanged.
*/
flags |= FIEMAP_EXTENT_LAST; flags |= FIEMAP_EXTENT_LAST;
} }