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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
[XFS] Fix a bug in xfs_iomap for extent handling of write cases
This may be the cause of several open PV's of incorrect
delay flags being set and then tripping asserts.
Do not return a delay alloc extent when the caller is asking to do a write.
SGI Modid: xfs-linux:xfs-kern:189616a
Signed-off-by: Russell Cattelan <cattelan@sgi.com>
Signed-off-by: Christoph Hellwig <hch@sgi.com>
authored by Russell Cattelan and committed by Christoph Hellwig 68d1498c 25128092
+3
-1
fs/xfs/xfs_iomap.c
+3
-1
fs/xfs/xfs_iomap.c
···
278
switch (flags & (BMAPI_WRITE|BMAPI_ALLOCATE|BMAPI_UNWRITTEN)) {
279
case BMAPI_WRITE:
280
/* If we found an extent, return it */
281
-
if (nimaps && (imap.br_startblock != HOLESTARTBLOCK)) {
282
xfs_iomap_map_trace(XFS_IOMAP_WRITE_MAP, io,
283
offset, count, iomapp, &imap, flags);
284
break;
···
278
switch (flags & (BMAPI_WRITE|BMAPI_ALLOCATE|BMAPI_UNWRITTEN)) {
279
case BMAPI_WRITE:
280
/* If we found an extent, return it */
281
+
if (nimaps &&
282
+
(imap.br_startblock != HOLESTARTBLOCK) &&
283
+
(imap.br_startblock != DELAYSTARTBLOCK)) {
284
xfs_iomap_map_trace(XFS_IOMAP_WRITE_MAP, io,
285
offset, count, iomapp, &imap, flags);
286
break;