From bc205ed19bdb56576b291830bc3f752aef5e3923 Mon Sep 17 00:00:00 2001 From: Pavel Shilovsky Date: Thu, 15 Mar 2012 13:22:27 +0300 Subject: CIFS: Prepare credits code for a slot reservation that is essential for CIFS/SMB/SMB2 oplock breaks and SMB2 echos. Reviewed-by: Jeff Layton Signed-off-by: Pavel Shilovsky Signed-off-by: Steve French --- fs/cifs/transport.c | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) (limited to 'fs/cifs/transport.c') diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index 58b31da17fc5..310918b6fcb4 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -255,26 +255,26 @@ smb_send(struct TCP_Server_Info *server, struct smb_hdr *smb_buffer, } static int -wait_for_free_request(struct TCP_Server_Info *server, const int long_op) +wait_for_free_credits(struct TCP_Server_Info *server, const int optype, + int *credits) { int rc; spin_lock(&server->req_lock); - - if (long_op == CIFS_ASYNC_OP) { + if (optype == CIFS_ASYNC_OP) { /* oplock breaks must not be held up */ server->in_flight++; - server->credits--; + *credits -= 1; spin_unlock(&server->req_lock); return 0; } while (1) { - if (server->credits <= 0) { + if (*credits <= 0) { spin_unlock(&server->req_lock); cifs_num_waiters_inc(server); rc = wait_event_killable(server->request_q, - has_credits(server)); + has_credits(server, credits)); cifs_num_waiters_dec(server); if (rc) return rc; @@ -291,8 +291,8 @@ wait_for_free_request(struct TCP_Server_Info *server, const int long_op) */ /* update # of requests on the wire to server */ - if (long_op != CIFS_BLOCKING_OP) { - server->credits--; + if (optype != CIFS_BLOCKING_OP) { + *credits -= 1; server->in_flight++; } spin_unlock(&server->req_lock); @@ -302,6 +302,12 @@ wait_for_free_request(struct TCP_Server_Info *server, const int long_op) return 0; } +static int +wait_for_free_request(struct TCP_Server_Info *server, const int optype) +{ + return wait_for_free_credits(server, optype, get_credits_field(server)); +} + static int allocate_mid(struct cifs_ses *ses, struct smb_hdr *in_buf, struct mid_q_entry **ppmidQ) { -- cgit v1.2.3-58-ga151