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| author |   NeilBrown <neilb@suse.com> | 2016-09-01 22:26:23 +0800 |
|---|---|---|
| committer |   Ilya Dryomov <idryomov@gmail.com> | 2016-10-03 16:13:49 +0200 |
| commit | 5d7eb1a3225309b294275385ece36fee256d5c46 (patch) | |
| tree | 58a8af4b49861403ee16e5ccac9d1bdb868c99b4 /fs/ceph | |
| parent | ceph: fix error handling of start_read() (diff) | |
| download | linux-dev-5d7eb1a3225309b294275385ece36fee256d5c46.tar.xz linux-dev-5d7eb1a3225309b294275385ece36fee256d5c46.zip | |
ceph: ignore error from invalidate_inode_pages2_range() in direct write
This call can fail if there are dirty pages. The preceding call to
filemap_write_and_wait_range() will normally remove dirty pages, but
as inode_lock() is not held over calls to ceph_direct_read_write(), it
could race with non-direct writes and pages could be dirtied
immediately after filemap_write_and_wait_range() returns
If there are dirty pages, they will be removed by the subsequent call
to truncate_inode_pages_range(), so having them here is not a problem.
If the 'ret' value is left holding an error, then in the async IO case
(aio_req is not NULL) the loop that would normally call
ceph_osdc_start_request() will see the error in 'ret' and abort all
requests. This doesn't seem like correct behaviour.
So use separate 'ret2' instead of overloading 'ret'.
Signed-off-by: NeilBrown <neilb@suse.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Yan, Zheng <zyan@redhat.com>
Diffstat (limited to 'fs/ceph')
| -rw-r--r-- | fs/ceph/file.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 0f5375d8e030..395c7fcb1cea 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -902,10 +902,10 @@ ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter, return ret; if (write) { - ret = invalidate_inode_pages2_range(inode->i_mapping, + int ret2 = invalidate_inode_pages2_range(inode->i_mapping, pos >> PAGE_SHIFT, (pos + count) >> PAGE_SHIFT); - if (ret < 0) + if (ret2 < 0) dout("invalidate_inode_pages2_range returned %d\n", ret); flags = CEPH_OSD_FLAG_ORDERSNAP | |