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-rw-r--r--fs/cifs/cifsproto.h5
-rw-r--r--fs/cifs/cifssmb.c41
-rw-r--r--fs/cifs/connect.c4
-rw-r--r--fs/cifs/file.c16
-rw-r--r--fs/cifs/transport.c95
5 files changed, 89 insertions, 72 deletions
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index dc5a6a6ff2f9..fb3e76043c50 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -48,8 +48,7 @@ extern int SendReceive(const unsigned int /* xid */ , struct cifsSesInfo *,
struct smb_hdr * /* out */ ,
int * /* bytes returned */ , const int long_op);
extern int SendReceive2(const unsigned int /* xid */ , struct cifsSesInfo *,
- struct smb_hdr * /* input */ , int hdr_len,
- const char * /* SMB data to send */ , int data_len,
+ struct kvec *, int /* nvec */,
int * /* bytes returned */ , const int long_op);
extern int checkSMBhdr(struct smb_hdr *smb, __u16 mid);
extern int checkSMB(struct smb_hdr *smb, __u16 mid, int length);
@@ -241,7 +240,7 @@ extern int CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon,
extern int CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
const int netfid, const unsigned int count,
const __u64 offset, unsigned int *nbytes,
- const char *buf,const int long_op);
+ struct kvec *iov, const int nvec, const int long_op);
extern int CIFSGetSrvInodeNumber(const int xid, struct cifsTconInfo *tcon,
const unsigned char *searchName, __u64 * inode_number,
const struct nls_table *nls_codepage,
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 52caac063a77..365949c14646 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -125,6 +125,9 @@ small_smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
rc = CIFSTCon(0, tcon->ses, tcon->treeName, tcon
, nls_codepage);
up(&tcon->ses->sesSem);
+ /* BB FIXME add code to check if wsize needs
+ update due to negotiated smb buffer size
+ shrinking */
if(rc == 0)
atomic_inc(&tconInfoReconnectCount);
@@ -220,6 +223,9 @@ smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
rc = CIFSTCon(0, tcon->ses, tcon->treeName,
tcon, nls_codepage);
up(&tcon->ses->sesSem);
+ /* BB FIXME add code to check if wsize needs
+ update due to negotiated smb buffer size
+ shrinking */
if(rc == 0)
atomic_inc(&tconInfoReconnectCount);
@@ -1128,15 +1134,13 @@ CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon,
int
CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
const int netfid, const unsigned int count,
- const __u64 offset, unsigned int *nbytes, const char *buf,
- const int long_op)
+ const __u64 offset, unsigned int *nbytes, struct kvec *iov,
+ int n_vec, const int long_op)
{
int rc = -EACCES;
WRITE_REQ *pSMB = NULL;
int bytes_returned;
int smb_hdr_len;
- __u32 bytes_sent;
- __u16 byte_count;
cFYI(1,("write2 at %lld %d bytes",offset,count)); /* BB removeme BB */
rc = small_smb_init(SMB_COM_WRITE_ANDX, 14, tcon, (void **) &pSMB);
@@ -1154,31 +1158,20 @@ CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
pSMB->WriteMode = 0;
pSMB->Remaining = 0;
- /* Can increase buffer size if buffer is big enough in some cases - ie
- can send more if LARGE_WRITE_X capability returned by the server and if
- our buffer is big enough or if we convert to iovecs on socket writes
- and eliminate the copy to the CIFS buffer */
- if(tcon->ses->capabilities & CAP_LARGE_WRITE_X) {
- bytes_sent = min_t(const unsigned int, CIFSMaxBufSize, count);
- } else {
- bytes_sent = (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)
- & ~0xFF;
- }
-
- if (bytes_sent > count)
- bytes_sent = count;
pSMB->DataOffset =
cpu_to_le16(offsetof(struct smb_com_write_req,Data) - 4);
- byte_count = bytes_sent + 1 /* pad */ ; /* BB fix this for sends > 64K */
- pSMB->DataLengthLow = cpu_to_le16(bytes_sent & 0xFFFF);
- pSMB->DataLengthHigh = cpu_to_le16(bytes_sent >> 16);
+ pSMB->DataLengthLow = cpu_to_le16(count & 0xFFFF);
+ pSMB->DataLengthHigh = cpu_to_le16(count >> 16);
smb_hdr_len = pSMB->hdr.smb_buf_length + 1; /* hdr + 1 byte pad */
- pSMB->hdr.smb_buf_length += bytes_sent+1;
- pSMB->ByteCount = cpu_to_le16(byte_count);
+ pSMB->hdr.smb_buf_length += count+1;
+ pSMB->ByteCount = cpu_to_le16(count + 1);
+
+ iov[0].iov_base = pSMB;
+ iov[0].iov_len = smb_hdr_len + 4;
- rc = SendReceive2(xid, tcon->ses, (struct smb_hdr *) pSMB, smb_hdr_len,
- buf, bytes_sent, &bytes_returned, long_op);
+ rc = SendReceive2(xid, tcon->ses, iov, n_vec + 1, &bytes_returned,
+ long_op);
cifs_stats_inc(&tcon->num_writes);
if (rc) {
cFYI(1, ("Send error in write = %d", rc));
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index e27e5ad8b591..f05d9e2016d5 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1891,6 +1891,10 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
}
}
}
+ if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
+ cifs_sb->wsize = min(cifs_sb->wsize,
+ (tcon->ses->server->maxBuf -
+ MAX_CIFS_HDR_SIZE));
}
/* volume_info.password is freed above when existing session found
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 3766db2bb7f2..941108352547 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -849,13 +849,19 @@ static ssize_t cifs_write(struct file *file, const char *write_data,
/* BB FIXME We can not sign across two buffers yet */
if((experimEnabled) && ((pTcon->ses->server->secMode &
(SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) == 0)) {
+ struct kvec iov[2];
+ unsigned int len;
+
+ len = min(cifs_sb->wsize,
+ write_size - total_written);
+ /* iov[0] is reserved for smb header */
+ iov[1].iov_base = (char *)write_data +
+ total_written;
+ iov[1].iov_len = len;
rc = CIFSSMBWrite2(xid, pTcon,
- open_file->netfid,
- min_t(const int, cifs_sb->wsize,
- write_size - total_written),
+ open_file->netfid, len,
*poffset, &bytes_written,
- write_data + total_written,
- long_op);
+ iov, 1, long_op);
} else
/* BB FIXME fixup indentation of line below */
#endif
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 9e8e85a8d186..38b3b2463ae4 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -147,16 +147,19 @@ smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer,
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));
+ 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++;
- if(i > 60) {
+ /* smaller timeout here than send2 since smaller size */
+ /* Although it may not be required, this also is smaller
+ oplock break time */
+ if(i > 30) {
cERROR(1,
- ("sends on sock %p stuck for 30 seconds",
+ ("sends on sock %p stuck for 15 seconds",
ssocket));
rc = -EAGAIN;
break;
@@ -172,7 +175,7 @@ smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer,
}
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;
}
@@ -182,22 +185,20 @@ smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer,
#ifdef CONFIG_CIFS_EXPERIMENTAL
static int
-smb_send2(struct socket *ssocket, struct smb_hdr *smb_buffer,
- unsigned int smb_hdr_length, const char * data, unsigned int datalen,
- struct sockaddr *sin)
+smb_send2(struct socket *ssocket, struct kvec *iov, int n_vec,
+ struct sockaddr *sin)
{
int rc = 0;
int i = 0;
struct msghdr smb_msg;
- struct kvec iov[2];
- unsigned len = smb_hdr_length + 4;
+ struct smb_hdr *smb_buffer = iov[0].iov_base;
+ unsigned int len = iov[0].iov_len;
+ unsigned int total_len;
+ int first_vec = 0;
if(ssocket == NULL)
return -ENOTSOCK; /* BB eventually add reconnect code here */
- iov[0].iov_base = smb_buffer;
- iov[0].iov_len = len;
- iov[1].iov_base = data;
- iov[1].iov_len = datalen;
+
smb_msg.msg_name = sin;
smb_msg.msg_namelen = sizeof (struct sockaddr);
smb_msg.msg_control = NULL;
@@ -209,18 +210,23 @@ smb_send2(struct socket *ssocket, struct smb_hdr *smb_buffer,
cifssmb.c and RFC1001 len is converted to bigendian in smb_send
Flags2 is converted in SendReceive */
+
+ total_len = 0;
+ for (i = 0; i < n_vec; i++)
+ total_len += iov[i].iov_len;
+
smb_buffer->smb_buf_length = cpu_to_be32(smb_buffer->smb_buf_length);
- cFYI(1, ("Sending smb: hdrlen %d datalen %d",
- smb_hdr_length,datalen));
+ cFYI(1, ("Sending smb: total_len %d", total_len));
dump_smb(smb_buffer, len);
- while (len + datalen > 0) {
- rc = kernel_sendmsg(ssocket, &smb_msg, iov, 2, len);
+ while (total_len) {
+ rc = kernel_sendmsg(ssocket, &smb_msg, &iov[first_vec],
+ n_vec - first_vec, total_len);
if ((rc == -ENOSPC) || (rc == -EAGAIN)) {
i++;
- if(i > 60) {
+ if(i > 40) {
cERROR(1,
- ("sends on sock %p stuck for 30 seconds",
+ ("sends on sock %p stuck for 20 seconds",
ssocket));
rc = -EAGAIN;
break;
@@ -230,43 +236,52 @@ smb_send2(struct socket *ssocket, struct smb_hdr *smb_buffer,
}
if (rc < 0)
break;
- if(iov[0].iov_len > 0) {
- if(rc >= len) {
- iov[0].iov_len = 0;
- rc -= len;
- len = 0;
- } else { /* some of hdr was not sent */
- len -= rc;
- iov[0].iov_len -= rc;
- iov[0].iov_base += rc;
- continue;
- }
+
+ if (rc >= total_len) {
+ WARN_ON(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");
+ msleep(500);
+ continue;
}
- if((iov[0].iov_len == 0) && (rc > 0)){
- iov[1].iov_base += rc;
- iov[1].iov_len -= rc;
- datalen -= rc;
+ total_len -= rc;
+ for (i = first_vec; i < n_vec; i++) {
+ if (iov[i].iov_len) {
+ if (rc > iov[i].iov_len) {
+ rc -= iov[i].iov_len;
+ iov[i].iov_len = 0;
+ } else {
+ iov[i].iov_base += rc;
+ iov[i].iov_len -= rc;
+ first_vec = i;
+ break;
+ }
+ }
}
}
if (rc < 0) {
- cERROR(1,("Error %d sending data on socket to server.", rc));
- } else {
+ cERROR(1,("Error %d sending data on socket to server", rc));
+ } else
rc = 0;
- }
return rc;
}
int
SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
- struct smb_hdr *in_buf, int hdrlen, const char * data,
- int datalen, int *pbytes_returned, const int long_op)
+ struct kvec *iov, int n_vec, int *pbytes_returned,
+ const int long_op)
{
int rc = 0;
unsigned int receive_len;
unsigned long timeout;
struct mid_q_entry *midQ;
+ struct smb_hdr *in_buf = iov[0].iov_base;
if (ses == NULL) {
cERROR(1,("Null smb session"));
@@ -364,7 +379,7 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
/* rc = cifs_sign_smb2(in_buf, data, ses->server, &midQ->sequence_number); */
midQ->midState = MID_REQUEST_SUBMITTED;
- rc = smb_send2(ses->server->ssocket, in_buf, hdrlen, data, datalen,
+ rc = smb_send2(ses->server->ssocket, iov, n_vec,
(struct sockaddr *) &(ses->server->addr.sockAddr));
if(rc < 0) {
DeleteMidQEntry(midQ);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 21:24:06 +0100