#include <linux/fs.h>
#include <linux/list.h>
+#include <linux/gfp.h>
#include <linux/wait.h>
#include <linux/net.h>
#include <linux/delay.h>
#include "cifs_debug.h"
extern mempool_t *cifs_mid_poolp;
-extern struct kmem_cache *cifs_oplock_cachep;
static struct mid_q_entry *
AllocMidQEntry(const struct smb_hdr *smb_buffer, struct TCP_Server_Info *server)
struct mid_q_entry *temp;
if (server == NULL) {
- cERROR(1, ("Null TCP session in AllocMidQEntry"));
+ cERROR(1, "Null TCP session in AllocMidQEntry");
return NULL;
}
temp->mid = smb_buffer->Mid; /* always LE */
temp->pid = current->pid;
temp->command = smb_buffer->Command;
- cFYI(1, ("For smb_command %d", temp->command));
+ cFYI(1, "For smb_command %d", temp->command);
/* do_gettimeofday(&temp->when_sent);*/ /* easier to use jiffies */
/* when mid allocated can be before when sent */
temp->when_alloc = jiffies;
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;
total_len += iov[i].iov_len;
smb_buffer->smb_buf_length = cpu_to_be32(smb_buffer->smb_buf_length);
- cFYI(1, ("Sending smb: total_len %d", total_len));
+ cFYI(1, "Sending smb: total_len %d", total_len);
dump_smb(smb_buffer, len);
i = 0;
n_vec - first_vec, total_len);
if ((rc == -ENOSPC) || (rc == -EAGAIN)) {
i++;
- if (i >= 14) {
- cERROR(1,
- ("sends on sock %p stuck for 15 seconds",
- ssocket));
+ /* 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);
rc = -EAGAIN;
break;
}
total_len = 0;
break;
} else if (rc > total_len) {
- cERROR(1, ("sent %d requested %d", rc, total_len));
+ cERROR(1, "sent %d requested %d", rc, total_len);
break;
}
if (rc == 0) {
/* should never happen, letting socket clear before
retrying is our only obvious option here */
- cERROR(1, ("tcp sent no data"));
+ cERROR(1, "tcp sent no data");
msleep(500);
continue;
}
}
if ((total_len > 0) && (total_len != smb_buf_length + 4)) {
- cFYI(1, ("partial send (%d remaining), terminating session",
- total_len));
+ cFYI(1, "partial send (%d remaining), terminating session",
+ total_len);
/* If we have only sent part of an SMB then the next SMB
could be taken as the remainder of this one. We need
to kill the socket so the server throws away the partial
}
if (rc < 0) {
- cERROR(1, ("Error %d sending data on socket to server", rc));
+ cERROR(1, "Error %d sending data on socket to server", rc);
} else
rc = 0;
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) {
}
if (ses->server->tcpStatus == CifsNeedReconnect) {
- cFYI(1, ("tcp session dead - return to caller to retry"));
+ cFYI(1, "tcp session dead - return to caller to retry");
return -EAGAIN;
}
lrt += time_to_wait;
if (time_after(jiffies, lrt)) {
/* No replies for time_to_wait. */
- cERROR(1, ("server not responding"));
+ cERROR(1, "server not responding");
return -1;
}
} else {
iov[0].iov_len = in_buf->smb_buf_length + 4;
flags |= CIFS_NO_RESP;
rc = SendReceive2(xid, ses, iov, 1, &resp_buf_type, flags);
- cFYI(DBG2, ("SendRcvNoRsp flags %d rc %d", flags, rc));
+ cFYI(DBG2, "SendRcvNoRsp flags %d rc %d", flags, rc);
return rc;
}
if ((ses == NULL) || (ses->server == NULL)) {
cifs_small_buf_release(in_buf);
- cERROR(1, ("Null session"));
+ cERROR(1, "Null session");
return -EIO;
}
#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;
else if (long_op == CIFS_BLOCKING_OP)
timeout = 0x7FFFFFFF; /* large, but not so large as to wrap */
else {
- cERROR(1, ("unknown timeout flag %d", long_op));
+ cERROR(1, "unknown timeout flag %d", long_op);
rc = -EIO;
goto out;
}
spin_lock(&GlobalMid_Lock);
if (midQ->resp_buf == NULL) {
- cERROR(1, ("No response to cmd %d mid %d",
- midQ->command, midQ->mid));
+ cERROR(1, "No response to cmd %d mid %d",
+ midQ->command, midQ->mid);
if (midQ->midState == MID_REQUEST_SUBMITTED) {
if (ses->server->tcpStatus == CifsExiting)
rc = -EHOSTDOWN;
if (rc != -EHOSTDOWN) {
if (midQ->midState == MID_RETRY_NEEDED) {
rc = -EAGAIN;
- cFYI(1, ("marking request for retry"));
+ cFYI(1, "marking request for retry");
} else {
rc = -EIO;
}
receive_len = midQ->resp_buf->smb_buf_length;
if (receive_len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE) {
- cERROR(1, ("Frame too large received. Length: %d Xid: %d",
- receive_len, xid));
+ cERROR(1, "Frame too large received. Length: %d Xid: %d",
+ receive_len, xid);
rc = -EIO;
goto out;
}
&ses->server->mac_signing_key,
midQ->sequence_number+1);
if (rc) {
- cERROR(1, ("Unexpected SMB signature"));
+ cERROR(1, "Unexpected SMB signature");
/* BB FIXME add code to kill session */
}
}
DeleteMidQEntry */
} else {
rc = -EIO;
- cFYI(1, ("Bad MID state?"));
+ cFYI(1, "Bad MID state?");
}
out:
struct mid_q_entry *midQ;
if (ses == NULL) {
- cERROR(1, ("Null smb session"));
+ cERROR(1, "Null smb session");
return -EIO;
}
if (ses->server == NULL) {
- cERROR(1, ("Null tcp session"));
+ cERROR(1, "Null tcp session");
return -EIO;
}
use ses->maxReq */
if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
- cERROR(1, ("Illegal length, greater than maximum frame, %d",
- in_buf->smb_buf_length));
+ cERROR(1, "Illegal length, greater than maximum frame, %d",
+ in_buf->smb_buf_length);
return -EIO;
}
#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;
else if (long_op == CIFS_BLOCKING_OP)
timeout = 0x7FFFFFFF; /* large but no so large as to wrap */
else {
- cERROR(1, ("unknown timeout flag %d", long_op));
+ cERROR(1, "unknown timeout flag %d", long_op);
rc = -EIO;
goto out;
}
spin_lock(&GlobalMid_Lock);
if (midQ->resp_buf == NULL) {
- cERROR(1, ("No response for cmd %d mid %d",
- midQ->command, midQ->mid));
+ cERROR(1, "No response for cmd %d mid %d",
+ midQ->command, midQ->mid);
if (midQ->midState == MID_REQUEST_SUBMITTED) {
if (ses->server->tcpStatus == CifsExiting)
rc = -EHOSTDOWN;
if (rc != -EHOSTDOWN) {
if (midQ->midState == MID_RETRY_NEEDED) {
rc = -EAGAIN;
- cFYI(1, ("marking request for retry"));
+ cFYI(1, "marking request for retry");
} else {
rc = -EIO;
}
receive_len = midQ->resp_buf->smb_buf_length;
if (receive_len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE) {
- cERROR(1, ("Frame too large received. Length: %d Xid: %d",
- receive_len, xid));
+ cERROR(1, "Frame too large received. Length: %d Xid: %d",
+ receive_len, xid);
rc = -EIO;
goto out;
}
&ses->server->mac_signing_key,
midQ->sequence_number+1);
if (rc) {
- cERROR(1, ("Unexpected SMB signature"));
+ cERROR(1, "Unexpected SMB signature");
/* BB FIXME add code to kill session */
}
}
BCC(out_buf) = le16_to_cpu(BCC_LE(out_buf));
} else {
rc = -EIO;
- cERROR(1, ("Bad MID state?"));
+ cERROR(1, "Bad MID state?");
}
out:
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;
}
struct cifsSesInfo *ses;
if (tcon == NULL || tcon->ses == NULL) {
- cERROR(1, ("Null smb session"));
+ cERROR(1, "Null smb session");
return -EIO;
}
ses = tcon->ses;
if (ses->server == NULL) {
- cERROR(1, ("Null tcp session"));
+ cERROR(1, "Null tcp session");
return -EIO;
}
use ses->maxReq */
if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
- cERROR(1, ("Illegal length, greater than maximum frame, %d",
- in_buf->smb_buf_length));
+ cERROR(1, "Illegal length, greater than maximum frame, %d",
+ in_buf->smb_buf_length);
return -EIO;
}
#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;
spin_unlock(&GlobalMid_Lock);
receive_len = midQ->resp_buf->smb_buf_length;
} else {
- cERROR(1, ("No response for cmd %d mid %d",
- midQ->command, midQ->mid));
+ cERROR(1, "No response for cmd %d mid %d",
+ midQ->command, midQ->mid);
if (midQ->midState == MID_REQUEST_SUBMITTED) {
if (ses->server->tcpStatus == CifsExiting)
rc = -EHOSTDOWN;
if (rc != -EHOSTDOWN) {
if (midQ->midState == MID_RETRY_NEEDED) {
rc = -EAGAIN;
- cFYI(1, ("marking request for retry"));
+ cFYI(1, "marking request for retry");
} else {
rc = -EIO;
}
}
if (receive_len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE) {
- cERROR(1, ("Frame too large received. Length: %d Xid: %d",
- receive_len, xid));
+ cERROR(1, "Frame too large received. Length: %d Xid: %d",
+ receive_len, xid);
rc = -EIO;
goto out;
}
if ((out_buf == NULL) || (midQ->midState != MID_RESPONSE_RECEIVED)) {
rc = -EIO;
- cERROR(1, ("Bad MID state?"));
+ cERROR(1, "Bad MID state?");
goto out;
}
&ses->server->mac_signing_key,
midQ->sequence_number+1);
if (rc) {
- cERROR(1, ("Unexpected SMB signature"));
+ cERROR(1, "Unexpected SMB signature");
/* BB FIXME add code to kill session */
}
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff