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* [PATCH AUTOSEL 5.7 39/40] SUNRPC reverting d03727b248d0 ("NFSv4 fix CLOSE not waiting for direct IO compeletion")
       [not found] <20200720213715.406997-1-sashal@kernel.org>
@ 2020-07-20 21:37 ` Sasha Levin
  0 siblings, 0 replies; only message in thread
From: Sasha Levin @ 2020-07-20 21:37 UTC (permalink / raw)
  To: linux-kernel, stable
  Cc: Olga Kornievskaia, Anna Schumaker, Sasha Levin, linux-nfs

From: Olga Kornievskaia <kolga@netapp.com>

[ Upstream commit 65caafd0d2145d1dd02072c4ced540624daeab40 ]

Reverting commit d03727b248d0 "NFSv4 fix CLOSE not waiting for
direct IO compeletion". This patch made it so that fput() by calling
inode_dio_done() in nfs_file_release() would wait uninterruptably
for any outstanding directIO to the file (but that wait on IO should
be killable).

The problem the patch was also trying to address was REMOVE returning
ERR_ACCESS because the file is still opened, is supposed to be resolved
by server returning ERR_FILE_OPEN and not ERR_ACCESS.

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/nfs/direct.c | 13 ++++---------
 fs/nfs/file.c   |  1 -
 2 files changed, 4 insertions(+), 10 deletions(-)

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index f0c3f0123131e..d49b1d1979084 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -267,6 +267,8 @@ static void nfs_direct_complete(struct nfs_direct_req *dreq)
 {
 	struct inode *inode = dreq->inode;
 
+	inode_dio_end(inode);
+
 	if (dreq->iocb) {
 		long res = (long) dreq->error;
 		if (dreq->count != 0) {
@@ -278,10 +280,7 @@ static void nfs_direct_complete(struct nfs_direct_req *dreq)
 
 	complete(&dreq->completion);
 
-	igrab(inode);
 	nfs_direct_req_release(dreq);
-	inode_dio_end(inode);
-	iput(inode);
 }
 
 static void nfs_direct_read_completion(struct nfs_pgio_header *hdr)
@@ -411,10 +410,8 @@ static ssize_t nfs_direct_read_schedule_iovec(struct nfs_direct_req *dreq,
 	 * generic layer handle the completion.
 	 */
 	if (requested_bytes == 0) {
-		igrab(inode);
-		nfs_direct_req_release(dreq);
 		inode_dio_end(inode);
-		iput(inode);
+		nfs_direct_req_release(dreq);
 		return result < 0 ? result : -EIO;
 	}
 
@@ -867,10 +864,8 @@ static ssize_t nfs_direct_write_schedule_iovec(struct nfs_direct_req *dreq,
 	 * generic layer handle the completion.
 	 */
 	if (requested_bytes == 0) {
-		igrab(inode);
-		nfs_direct_req_release(dreq);
 		inode_dio_end(inode);
-		iput(inode);
+		nfs_direct_req_release(dreq);
 		return result < 0 ? result : -EIO;
 	}
 
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index ccd6c1637b270..f96367a2463e3 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -83,7 +83,6 @@ nfs_file_release(struct inode *inode, struct file *filp)
 	dprintk("NFS: release(%pD2)\n", filp);
 
 	nfs_inc_stats(inode, NFSIOS_VFSRELEASE);
-	inode_dio_wait(inode);
 	nfs_file_clear_open_context(filp);
 	return 0;
 }
-- 
2.25.1


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2020-07-20 21:37 ` [PATCH AUTOSEL 5.7 39/40] SUNRPC reverting d03727b248d0 ("NFSv4 fix CLOSE not waiting for direct IO compeletion") Sasha Levin

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