linux-kernel - [PATCH 10/19] orangefs: service ops done for writeback are not killable

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Date:   Sun,  7 Oct 2018 23:27:27 +0000
From:   Martin Brandenburg <martin@...ibond.com>
To:     devel@...ts.orangefs.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, hubcap@...ibond.com
Cc:     Martin Brandenburg <martin@...ibond.com>
Subject: [PATCH 10/19] orangefs: service ops done for writeback are not killable

Signed-off-by: Martin Brandenburg <martin@...ibond.com>
---
 fs/orangefs/orangefs-kernel.h |  1 +
 fs/orangefs/orangefs-utils.c  |  2 +-
 fs/orangefs/waitqueue.c       | 18 ++++++++++--------
 3 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/fs/orangefs/orangefs-kernel.h b/fs/orangefs/orangefs-kernel.h
index 9fe60d086e2d..cdb08e51a4b1 100644
--- a/fs/orangefs/orangefs-kernel.h
+++ b/fs/orangefs/orangefs-kernel.h
@@ -441,6 +441,7 @@ extern const struct dentry_operations orangefs_dentry_operations;
 #define ORANGEFS_OP_CANCELLATION  4   /* this is a cancellation */
 #define ORANGEFS_OP_NO_MUTEX      8   /* don't acquire request_mutex */
 #define ORANGEFS_OP_ASYNC         16  /* Queue it, but don't wait */
+#define ORANGEFS_OP_WRITEBACK     32
 
 int service_operation(struct orangefs_kernel_op_s *op,
 		      const char *op_name,
diff --git a/fs/orangefs/orangefs-utils.c b/fs/orangefs/orangefs-utils.c
index a4fac527f85d..9221c4a3398e 100644
--- a/fs/orangefs/orangefs-utils.c
+++ b/fs/orangefs/orangefs-utils.c
@@ -430,7 +430,7 @@ int orangefs_inode_setattr(struct inode *inode)
 	spin_unlock(&inode->i_lock);
 
 	ret = service_operation(new_op, __func__,
-	    get_interruptible_flag(inode));
+	    get_interruptible_flag(inode) | ORANGEFS_OP_WRITEBACK);
 	gossip_debug(GOSSIP_UTILS_DEBUG,
 	    "orangefs_inode_setattr: returning %d\n", ret);
 	if (ret)
diff --git a/fs/orangefs/waitqueue.c b/fs/orangefs/waitqueue.c
index 0729d2645d6a..beafc33d57be 100644
--- a/fs/orangefs/waitqueue.c
+++ b/fs/orangefs/waitqueue.c
@@ -19,7 +19,7 @@
 
 static int wait_for_matching_downcall(struct orangefs_kernel_op_s *op,
 		long timeout,
-		bool interruptible)
+		int flags)
 			__acquires(op->lock);
 static void orangefs_clean_up_interrupted_operation(struct orangefs_kernel_op_s *op)
 	__releases(op->lock);
@@ -143,9 +143,7 @@ int service_operation(struct orangefs_kernel_op_s *op,
 	if (!(flags & ORANGEFS_OP_NO_MUTEX))
 		mutex_unlock(&orangefs_request_mutex);
 
-	ret = wait_for_matching_downcall(op, timeout,
-					 flags & ORANGEFS_OP_INTERRUPTIBLE);
-
+	ret = wait_for_matching_downcall(op, timeout, flags);
 	gossip_debug(GOSSIP_WAIT_DEBUG,
 		     "%s: wait_for_matching_downcall returned %d for %p\n",
 		     __func__,
@@ -319,10 +317,12 @@ static void
  */
 static int wait_for_matching_downcall(struct orangefs_kernel_op_s *op,
 		long timeout,
-		bool interruptible)
+		int flags)
 			__acquires(op->lock)
 {
 	long n;
+	int writeback = flags & ORANGEFS_OP_WRITEBACK,
+	    interruptible = flags & ORANGEFS_OP_INTERRUPTIBLE;
 
 	/*
 	 * There's a "schedule_timeout" inside of these wait
@@ -330,10 +330,12 @@ static int wait_for_matching_downcall(struct orangefs_kernel_op_s *op,
 	 * user process that needs something done and is being
 	 * manipulated by the client-core process.
 	 */
-	if (interruptible)
+	if (writeback)
+		n = wait_for_completion_io_timeout(&op->waitq, timeout);
+	else if (!writeback && interruptible)
 		n = wait_for_completion_interruptible_timeout(&op->waitq,
-							      timeout);
-	else
+								      timeout);
+	else /* !writeback && !interruptible but compiler complains */
 		n = wait_for_completion_killable_timeout(&op->waitq, timeout);
 
 	spin_lock(&op->lock);
-- 
2.19.0