The patch titled
Subject: hfsplus: fix return value of hfsplus_get_block()
has been added to the -mm tree. Its filename is
hfsplus-fix-return-value-of-hfsplus_get_block.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/hfsplus-fix-return-value-of-hfsplus_get_block.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/hfsplus-fix-return-value-of-hfsplus_get_block.patch
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------------------------------------------------------
From: Ernesto A. Fernandez <ernesto.mnd.fernandez@xxxxxxxxx>
Subject: hfsplus: fix return value of hfsplus_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 hfsplus is worse affected than the
other filesystems because the fallback to buffered I/O doesn't happen.
The problem is the return value of hfsplus_get_block() when called with
!create. Change it to be more consistent with the other modules.
Link: http://lkml.kernel.org/r/2cd1301404ec7cf1e39c8f11a01a4302f1460ad6.1539195310.git.ernesto.mnd.fernandez@xxxxxxxxx
Signed-off-by: Ernesto A. Fernandez <ernesto.mnd.fernandez@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
diff -puN fs/hfsplus/extents.c~hfsplus-fix-return-value-of-hfsplus_get_block fs/hfsplus/extents.c
--- a/fs/hfsplus/extents.c~hfsplus-fix-return-value-of-hfsplus_get_block
+++ a/fs/hfsplus/extents.c
@@ -237,7 +237,9 @@ int hfsplus_get_block(struct inode *inod
ablock = iblock >> sbi->fs_shift;
if (iblock >= hip->fs_blocks) {
- if (iblock > hip->fs_blocks || !create)
+ if (!create)
+ return 0;
+ if (iblock > hip->fs_blocks)
return -EIO;
if (ablock >= hip->alloc_blocks) {
res = hfsplus_file_extend(inode, false);
_
Patches currently in -mm which might be from ernesto.mnd.fernandez@xxxxxxxxx are
hfsplus-prevent-btree-data-loss-on-root-split.patch
hfsplus-fix-bug-on-bnode-parent-update.patch
hfs-prevent-btree-data-loss-on-root-split.patch
hfs-fix-bug-on-bnode-parent-update.patch
hfsplus-prevent-btree-data-loss-on-enospc.patch
hfs-prevent-btree-data-loss-on-enospc.patch
hfsplus-fix-return-value-of-hfsplus_get_block.patch
hfs-fix-return-value-of-hfs_get_block.patch
