Messages in this thread Patch in this message | | | From | Ben Hutchings <> | Date | Thu, 07 Jun 2018 15:05:21 +0100 | Subject | [PATCH 3.16 137/410] NFS: commit direct writes even if they fail partially |
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3.16.57-rc1 review patch. If anyone has any objections, please let me know.
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From: "J. Bruce Fields" <bfields@redhat.com>
commit 1b8d97b0a837beaf48a8449955b52c650a7114b4 upstream.
If some of the WRITE calls making up an O_DIRECT write syscall fail, we neglect to commit, even if some of the WRITEs succeed.
We also depend on the commit code to free the reference count on the nfs_page taken in the "if (request_commit)" case at the end of nfs_direct_write_completion(). The problem was originally noticed because ENOSPC's encountered partway through a write would result in a closed file being sillyrenamed when it should have been unlinked.
Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> [bwh: Backported to 3.16: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- fs/nfs/direct.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
--- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -732,10 +732,8 @@ static void nfs_direct_write_completion( spin_lock(&dreq->lock); - if (test_bit(NFS_IOHDR_ERROR, &hdr->flags)) { - dreq->flags = 0; + if (test_bit(NFS_IOHDR_ERROR, &hdr->flags)) dreq->error = hdr->error; - } if (dreq->error != 0) bit = NFS_IOHDR_ERROR; else {
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