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authorRonnie Sahlberg <lsahlber@redhat.com>2019-03-08 05:58:22 +0300
committerSteve French <stfrench@microsoft.com>2019-03-15 03:32:35 +0300
commit2b53b929faedacc6531bbb4315585cb7c14a252d (patch)
treefb8824c64da425a206749e1ae8a054177a26e4f4 /fs/cifs/transport.c
parent16b34aa44b257155d9392a19e08e4ce139bc2789 (diff)
downloadlinux-2b53b929faedacc6531bbb4315585cb7c14a252d.tar.xz
cifs: add a timeout argument to wait_for_free_credits
A negative timeout is the same as the current behaviour, i.e. no timeout. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Diffstat (limited to 'fs/cifs/transport.c')
-rw-r--r--fs/cifs/transport.c40
1 files changed, 30 insertions, 10 deletions
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 9e08ce722dbb..b3d04018195c 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -487,11 +487,18 @@ smb_send(struct TCP_Server_Info *server, struct smb_hdr *smb_buffer,
static int
wait_for_free_credits(struct TCP_Server_Info *server, const int num_credits,
- const int flags, unsigned int *instance)
+ const int timeout, const int flags,
+ unsigned int *instance)
{
int rc;
int *credits;
int optype;
+ long int t;
+
+ if (timeout < 0)
+ t = MAX_JIFFY_OFFSET;
+ else
+ t = msecs_to_jiffies(timeout);
optype = flags & CIFS_OP_MASK;
@@ -516,11 +523,16 @@ wait_for_free_credits(struct TCP_Server_Info *server, const int num_credits,
if (*credits < num_credits) {
spin_unlock(&server->req_lock);
cifs_num_waiters_inc(server);
- rc = wait_event_killable(server->request_q,
- has_credits(server, credits, num_credits));
+ rc = wait_event_killable_timeout(server->request_q,
+ has_credits(server, credits, num_credits), t);
cifs_num_waiters_dec(server);
- if (rc)
- return rc;
+ if (!rc) {
+ cifs_dbg(VFS, "wait timed out after %d ms\n",
+ timeout);
+ return -ENOTSUPP;
+ }
+ if (rc == -ERESTARTSYS)
+ return -ERESTARTSYS;
spin_lock(&server->req_lock);
} else {
if (server->tcpStatus == CifsExiting) {
@@ -546,12 +558,19 @@ wait_for_free_credits(struct TCP_Server_Info *server, const int num_credits,
*credits <= MAX_COMPOUND) {
spin_unlock(&server->req_lock);
cifs_num_waiters_inc(server);
- rc = wait_event_killable(server->request_q,
+ rc = wait_event_killable_timeout(
+ server->request_q,
has_credits(server, credits,
- MAX_COMPOUND + 1));
+ MAX_COMPOUND + 1),
+ t);
cifs_num_waiters_dec(server);
- if (rc)
- return rc;
+ if (!rc) {
+ cifs_dbg(VFS, "wait timed out after %d ms\n",
+ timeout);
+ return -ENOTSUPP;
+ }
+ if (rc == -ERESTARTSYS)
+ return -ERESTARTSYS;
spin_lock(&server->req_lock);
continue;
}
@@ -578,7 +597,8 @@ static int
wait_for_free_request(struct TCP_Server_Info *server, const int flags,
unsigned int *instance)
{
- return wait_for_free_credits(server, 1, flags, instance);
+ return wait_for_free_credits(server, 1, -1, flags,
+ instance);
}
int