#include <linux/fs.h>
#include <linux/list.h>
+#include <linux/gfp.h>
#include <linux/wait.h>
#include <linux/net.h>
#include <linux/delay.h>
mempool_free(midEntry, cifs_mid_poolp);
}
-struct oplock_q_entry *
-AllocOplockQEntry(struct inode *pinode, __u16 fid, struct cifsTconInfo *tcon)
-{
- struct oplock_q_entry *temp;
- if ((pinode == NULL) || (tcon == NULL)) {
- cERROR(1, ("Null parms passed to AllocOplockQEntry"));
- return NULL;
- }
- temp = (struct oplock_q_entry *) kmem_cache_alloc(cifs_oplock_cachep,
- GFP_KERNEL);
- if (temp == NULL)
- return temp;
- else {
- temp->pinode = pinode;
- temp->tcon = tcon;
- temp->netfid = fid;
- spin_lock(&GlobalMid_Lock);
- list_add_tail(&temp->qhead, &GlobalOplock_Q);
- spin_unlock(&GlobalMid_Lock);
- }
- return temp;
-
-}
-
-void DeleteOplockQEntry(struct oplock_q_entry *oplockEntry)
-{
- spin_lock(&GlobalMid_Lock);
- /* should we check if list empty first? */
- list_del(&oplockEntry->qhead);
- spin_unlock(&GlobalMid_Lock);
- kmem_cache_free(cifs_oplock_cachep, oplockEntry);
-}
-
-
-void DeleteTconOplockQEntries(struct cifsTconInfo *tcon)
-{
- struct oplock_q_entry *temp;
-
- if (tcon == NULL)
- return;
-
- spin_lock(&GlobalMid_Lock);
- list_for_each_entry(temp, &GlobalOplock_Q, qhead) {
- if ((temp->tcon) && (temp->tcon == tcon)) {
- list_del(&temp->qhead);
- kmem_cache_free(cifs_oplock_cachep, temp);
- }
- }
- spin_unlock(&GlobalMid_Lock);
-}
-
-int
-smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer,
- unsigned int smb_buf_length, struct sockaddr *sin, bool noblocksnd)
-{
- int rc = 0;
- int i = 0;
- struct msghdr smb_msg;
- struct kvec iov;
- unsigned len = smb_buf_length + 4;
-
- if (ssocket == NULL)
- return -ENOTSOCK; /* BB eventually add reconnect code here */
- iov.iov_base = smb_buffer;
- iov.iov_len = len;
-
- smb_msg.msg_name = sin;
- smb_msg.msg_namelen = sizeof(struct sockaddr);
- smb_msg.msg_control = NULL;
- smb_msg.msg_controllen = 0;
- if (noblocksnd)
- smb_msg.msg_flags = MSG_DONTWAIT + MSG_NOSIGNAL;
- else
- smb_msg.msg_flags = MSG_NOSIGNAL;
-
- /* smb header is converted in header_assemble. bcc and rest of SMB word
- area, and byte area if necessary, is converted to littleendian in
- cifssmb.c and RFC1001 len is converted to bigendian in smb_send
- Flags2 is converted in SendReceive */
-
- smb_buffer->smb_buf_length = cpu_to_be32(smb_buffer->smb_buf_length);
- cFYI(1, ("Sending smb of length %d", smb_buf_length));
- dump_smb(smb_buffer, len);
-
- while (len > 0) {
- rc = kernel_sendmsg(ssocket, &smb_msg, &iov, 1, len);
- if ((rc == -ENOSPC) || (rc == -EAGAIN)) {
- i++;
- /* smaller timeout here than send2 since smaller size */
- /* Although it may not be required, this also is smaller
- oplock break time */
- if (i > 12) {
- cERROR(1,
- ("sends on sock %p stuck for 7 seconds",
- ssocket));
- rc = -EAGAIN;
- break;
- }
- msleep(1 << i);
- continue;
- }
- if (rc < 0)
- break;
- else
- i = 0; /* reset i after each successful send */
- iov.iov_base += rc;
- iov.iov_len -= rc;
- len -= rc;
- }
-
- if (rc < 0) {
- cERROR(1, ("Error %d sending data on socket to server", rc));
- } else {
- rc = 0;
- }
-
- /* Don't want to modify the buffer as a
- side effect of this call. */
- smb_buffer->smb_buf_length = smb_buf_length;
-
- return rc;
-}
-
static int
-smb_send2(struct TCP_Server_Info *server, struct kvec *iov, int n_vec,
- struct sockaddr *sin, bool noblocksnd)
+smb_sendv(struct TCP_Server_Info *server, struct kvec *iov, int n_vec)
{
int rc = 0;
int i = 0;
if (ssocket == NULL)
return -ENOTSOCK; /* BB eventually add reconnect code here */
- smb_msg.msg_name = sin;
+ smb_msg.msg_name = (struct sockaddr *) &server->addr.sockAddr;
smb_msg.msg_namelen = sizeof(struct sockaddr);
smb_msg.msg_control = NULL;
smb_msg.msg_controllen = 0;
- if (noblocksnd)
+ if (server->noblocksnd)
smb_msg.msg_flags = MSG_DONTWAIT + MSG_NOSIGNAL;
else
smb_msg.msg_flags = MSG_NOSIGNAL;
n_vec - first_vec, total_len);
if ((rc == -ENOSPC) || (rc == -EAGAIN)) {
i++;
- if (i >= 14) {
+ /* if blocking send we try 3 times, since each can block
+ for 5 seconds. For nonblocking we have to try more
+ but wait increasing amounts of time allowing time for
+ socket to clear. The overall time we wait in either
+ case to send on the socket is about 15 seconds.
+ Similarly we wait for 15 seconds for
+ a response from the server in SendReceive[2]
+ for the server to send a response back for
+ most types of requests (except SMB Write
+ past end of file which can be slow, and
+ blocking lock operations). NFS waits slightly longer
+ than CIFS, but this can make it take longer for
+ nonresponsive servers to be detected and 15 seconds
+ is more than enough time for modern networks to
+ send a packet. In most cases if we fail to send
+ after the retries we will kill the socket and
+ reconnect which may clear the network problem.
+ */
+ if ((i >= 14) || (!server->noblocksnd && (i > 2))) {
cERROR(1,
("sends on sock %p stuck for 15 seconds",
ssocket));
return rc;
}
+int
+smb_send(struct TCP_Server_Info *server, struct smb_hdr *smb_buffer,
+ unsigned int smb_buf_length)
+{
+ struct kvec iov;
+
+ iov.iov_base = smb_buffer;
+ iov.iov_len = smb_buf_length + 4;
+
+ return smb_sendv(server, &iov, 1);
+}
+
static int wait_for_free_request(struct cifsSesInfo *ses, const int long_op)
{
if (long_op == CIFS_ASYNC_OP) {
#ifdef CONFIG_CIFS_STATS2
atomic_inc(&ses->server->inSend);
#endif
- rc = smb_send2(ses->server, iov, n_vec,
- (struct sockaddr *) &(ses->server->addr.sockAddr),
- ses->server->noblocksnd);
+ rc = smb_sendv(ses->server, iov, n_vec);
#ifdef CONFIG_CIFS_STATS2
atomic_dec(&ses->server->inSend);
midQ->when_sent = jiffies;
#ifdef CONFIG_CIFS_STATS2
atomic_inc(&ses->server->inSend);
#endif
- rc = smb_send(ses->server->ssocket, in_buf, in_buf->smb_buf_length,
- (struct sockaddr *) &(ses->server->addr.sockAddr),
- ses->server->noblocksnd);
+ rc = smb_send(ses->server, in_buf, in_buf->smb_buf_length);
#ifdef CONFIG_CIFS_STATS2
atomic_dec(&ses->server->inSend);
midQ->when_sent = jiffies;
mutex_unlock(&ses->server->srv_mutex);
return rc;
}
- rc = smb_send(ses->server->ssocket, in_buf, in_buf->smb_buf_length,
- (struct sockaddr *) &(ses->server->addr.sockAddr),
- ses->server->noblocksnd);
+ rc = smb_send(ses->server, in_buf, in_buf->smb_buf_length);
mutex_unlock(&ses->server->srv_mutex);
return rc;
}
#ifdef CONFIG_CIFS_STATS2
atomic_inc(&ses->server->inSend);
#endif
- rc = smb_send(ses->server->ssocket, in_buf, in_buf->smb_buf_length,
- (struct sockaddr *) &(ses->server->addr.sockAddr),
- ses->server->noblocksnd);
+ rc = smb_send(ses->server, in_buf, in_buf->smb_buf_length);
#ifdef CONFIG_CIFS_STATS2
atomic_dec(&ses->server->inSend);
midQ->when_sent = jiffies;
cERROR(1, ("Frame too large received. Length: %d Xid: %d",
receive_len, xid));
rc = -EIO;
- } else { /* rcvd frame is ok */
-
- if (midQ->resp_buf && out_buf
- && (midQ->midState == MID_RESPONSE_RECEIVED)) {
- out_buf->smb_buf_length = receive_len;
- memcpy((char *)out_buf + 4,
- (char *)midQ->resp_buf + 4,
- receive_len);
-
- dump_smb(out_buf, 92);
- /* convert the length into a more usable form */
- if ((receive_len > 24) &&
- (ses->server->secMode & (SECMODE_SIGN_REQUIRED |
- SECMODE_SIGN_ENABLED))) {
- rc = cifs_verify_signature(out_buf,
- &ses->server->mac_signing_key,
- midQ->sequence_number+1);
- if (rc) {
- cERROR(1, ("Unexpected SMB signature"));
- /* BB FIXME add code to kill session */
- }
- }
+ goto out;
+ }
- *pbytes_returned = out_buf->smb_buf_length;
+ /* rcvd frame is ok */
- /* BB special case reconnect tid and uid here? */
- rc = map_smb_to_linux_error(out_buf, 0 /* no log */ );
+ if ((out_buf == NULL) || (midQ->midState != MID_RESPONSE_RECEIVED)) {
+ rc = -EIO;
+ cERROR(1, ("Bad MID state?"));
+ goto out;
+ }
- /* convert ByteCount if necessary */
- if (receive_len >= sizeof(struct smb_hdr) - 4
- /* do not count RFC1001 header */ +
- (2 * out_buf->WordCount) + 2 /* bcc */ )
- BCC(out_buf) = le16_to_cpu(BCC_LE(out_buf));
- } else {
- rc = -EIO;
- cERROR(1, ("Bad MID state?"));
+ out_buf->smb_buf_length = receive_len;
+ memcpy((char *)out_buf + 4,
+ (char *)midQ->resp_buf + 4,
+ receive_len);
+
+ dump_smb(out_buf, 92);
+ /* convert the length into a more usable form */
+ if ((receive_len > 24) &&
+ (ses->server->secMode & (SECMODE_SIGN_REQUIRED |
+ SECMODE_SIGN_ENABLED))) {
+ rc = cifs_verify_signature(out_buf,
+ &ses->server->mac_signing_key,
+ midQ->sequence_number+1);
+ if (rc) {
+ cERROR(1, ("Unexpected SMB signature"));
+ /* BB FIXME add code to kill session */
}
}
+
+ *pbytes_returned = out_buf->smb_buf_length;
+
+ /* BB special case reconnect tid and uid here? */
+ rc = map_smb_to_linux_error(out_buf, 0 /* no log */ );
+
+ /* convert ByteCount if necessary */
+ if (receive_len >= sizeof(struct smb_hdr) - 4
+ /* do not count RFC1001 header */ +
+ (2 * out_buf->WordCount) + 2 /* bcc */ )
+ BCC(out_buf) = le16_to_cpu(BCC_LE(out_buf));
+
+out:
DeleteMidQEntry(midQ);
if (rstart && rc == -EACCES)
return -ERESTARTSYS;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff