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authorErnesto A. Fernández <ernesto.mnd.fernandez@gmail.com>2018-10-30 15:06:24 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-10-31 08:54:13 -0700
commit1267a07be5ebbff2d2739290f3d043ae137c15b4 (patch)
treebc93479e2a8d8472d9aedc7226d7aebff7872e30
parent839c3a6a5e1fbc8542d581911b35b2cb5cd29304 (diff)
hfs: fix return value of hfs_get_block()
Direct writes to empty inodes fail with EIO. The generic direct-io code is in part to blame (a patch has been submitted as "direct-io: allow direct writes to empty inodes"), but hfs is worse affected than the other filesystems because the fallback to buffered I/O doesn't happen. The problem is the return value of hfs_get_block() when called with !create. Change it to be more consistent with the other modules. Link: http://lkml.kernel.org/r/4538ab8c35ea37338490525f0f24cbc37227528c.1539195310.git.ernesto.mnd.fernandez@gmail.com Signed-off-by: Ernesto A. Fernández <ernesto.mnd.fernandez@gmail.com> Reviewed-by: Vyacheslav Dubeyko <slava@dubeyko.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/hfs/extent.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/hfs/extent.c b/fs/hfs/extent.c
index 0c638c612152..5f1ff97a3b98 100644
--- a/fs/hfs/extent.c
+++ b/fs/hfs/extent.c
@@ -345,7 +345,9 @@ int hfs_get_block(struct inode *inode, sector_t block,
ablock = (u32)block / HFS_SB(sb)->fs_div;
if (block >= HFS_I(inode)->fs_blocks) {
- if (block > HFS_I(inode)->fs_blocks || !create)
+ if (!create)
+ return 0;
+ if (block > HFS_I(inode)->fs_blocks)
return -EIO;
if (ablock >= HFS_I(inode)->alloc_blocks) {
res = hfs_extend_file(inode);