From e831e6cf3acb058d898411367a582deef80e32f8 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Tue, 11 Oct 2011 06:41:32 -0400 Subject: cifs: make smb_msg local to read_from_socket If msg_controllen is 0, then the socket layer should never touch these fields. Thus, there's no need to continually reset them. Also, there's no need to keep this field on the stack for the demultiplex thread, just make it a local variable in read_from_socket. Signed-off-by: Jeff Layton Signed-off-by: Steve French --- fs/cifs/connect.c | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) (limited to 'fs/cifs') diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 6126fbeaecb6..ed969fd5f7cc 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -359,16 +359,20 @@ allocate_buffers(char **bigbuf, char **smallbuf, unsigned int size, } static int -read_from_socket(struct TCP_Server_Info *server, struct msghdr *smb_msg, +read_from_socket(struct TCP_Server_Info *server, struct kvec *iov, unsigned int to_read, unsigned int *ptotal_read, bool is_header_read) { int length, rc = 0; unsigned int total_read; + struct msghdr smb_msg; char *buf = iov->iov_base; + smb_msg.msg_control = NULL; + smb_msg.msg_controllen = 0; + for (total_read = 0; total_read < to_read; total_read += length) { - length = kernel_recvmsg(server->ssocket, smb_msg, iov, 1, + length = kernel_recvmsg(server->ssocket, &smb_msg, iov, 1, to_read - total_read, 0); if (server->tcpStatus == CifsExiting) { /* then will exit */ @@ -397,8 +401,6 @@ read_from_socket(struct TCP_Server_Info *server, struct msghdr *smb_msg, iov->iov_base = (to_read - total_read) + buf; iov->iov_len = to_read - total_read; - smb_msg->msg_control = NULL; - smb_msg->msg_controllen = 0; rc = 3; } else rc = 1; @@ -634,7 +636,6 @@ cifs_demultiplex_thread(void *p) unsigned int pdu_length, total_read; char *buf = NULL, *bigbuf = NULL, *smallbuf = NULL; struct smb_hdr *smb_buffer = NULL; - struct msghdr smb_msg; struct kvec iov; struct task_struct *task_to_wake = NULL; struct mid_q_entry *mid_entry; @@ -665,8 +666,6 @@ cifs_demultiplex_thread(void *p) buf = smallbuf; iov.iov_base = buf; iov.iov_len = 4; - smb_msg.msg_control = NULL; - smb_msg.msg_controllen = 0; pdu_length = 4; /* enough to get RFC1001 header */ incomplete_rcv: @@ -681,7 +680,7 @@ incomplete_rcv: continue; } - rc = read_from_socket(server, &smb_msg, &iov, pdu_length, + rc = read_from_socket(server, &iov, pdu_length, &total_read, true /* header read */); if (rc == 3) goto incomplete_rcv; @@ -710,7 +709,7 @@ incomplete_rcv: iov.iov_base = 4 + buf; iov.iov_len = pdu_length; - rc = read_from_socket(server, &smb_msg, &iov, pdu_length, + rc = read_from_socket(server, &iov, pdu_length, &total_read, false); if (rc == 2) break; -- cgit v1.2.3