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path: root/fs/cifs/cifssmb.c
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Diffstat (limited to 'fs/cifs/cifssmb.c')
-rw-r--r--fs/cifs/cifssmb.c135
1 files changed, 77 insertions, 58 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index b47261858e6d..f5099fb8a22f 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -673,6 +673,7 @@ CIFSSMBTDis(const unsigned int xid, struct cifs_tcon *tcon)
return rc;
rc = SendReceiveNoRsp(xid, tcon->ses, (char *)smb_buffer, 0);
+ cifs_small_buf_release(smb_buffer);
if (rc)
cifs_dbg(FYI, "Tree disconnect failed %d\n", rc);
@@ -707,9 +708,9 @@ CIFSSMBEcho(struct TCP_Server_Info *server)
{
ECHO_REQ *smb;
int rc = 0;
- struct kvec iov;
- struct smb_rqst rqst = { .rq_iov = &iov,
- .rq_nvec = 1 };
+ struct kvec iov[2];
+ struct smb_rqst rqst = { .rq_iov = iov,
+ .rq_nvec = 2 };
cifs_dbg(FYI, "In echo request\n");
@@ -724,10 +725,13 @@ CIFSSMBEcho(struct TCP_Server_Info *server)
put_bcc(1, &smb->hdr);
smb->Data[0] = 'a';
inc_rfc1001_len(smb, 3);
- iov.iov_base = smb;
- iov.iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4;
- rc = cifs_call_async(server, &rqst, NULL, cifs_echo_callback,
+ iov[0].iov_len = 4;
+ iov[0].iov_base = smb;
+ iov[1].iov_len = get_rfc1002_length(smb);
+ iov[1].iov_base = (char *)smb + 4;
+
+ rc = cifs_call_async(server, &rqst, NULL, cifs_echo_callback, NULL,
server, CIFS_ASYNC_OP | CIFS_ECHO_OP);
if (rc)
cifs_dbg(FYI, "Echo request failed: %d\n", rc);
@@ -772,6 +776,7 @@ CIFSSMBLogoff(const unsigned int xid, struct cifs_ses *ses)
pSMB->AndXCommand = 0xFF;
rc = SendReceiveNoRsp(xid, ses, (char *) pSMB, 0);
+ cifs_small_buf_release(pSMB);
session_already_dead:
mutex_unlock(&ses->session_mutex);
@@ -1394,8 +1399,8 @@ openRetry:
* Discard any remaining data in the current SMB. To do this, we borrow the
* current bigbuf.
*/
-static int
-discard_remaining_data(struct TCP_Server_Info *server)
+int
+cifs_discard_remaining_data(struct TCP_Server_Info *server)
{
unsigned int rfclen = get_rfc1002_length(server->smallbuf);
int remaining = rfclen + 4 - server->total_read;
@@ -1421,7 +1426,7 @@ cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid)
int length;
struct cifs_readdata *rdata = mid->callback_data;
- length = discard_remaining_data(server);
+ length = cifs_discard_remaining_data(server);
dequeue_mid(mid, rdata->result);
return length;
}
@@ -1454,7 +1459,7 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid)
if (server->ops->is_status_pending &&
server->ops->is_status_pending(buf, server, 0)) {
- discard_remaining_data(server);
+ cifs_discard_remaining_data(server);
return -1;
}
@@ -1507,10 +1512,12 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid)
}
/* set up first iov for signature check */
- rdata->iov.iov_base = buf;
- rdata->iov.iov_len = server->total_read;
- cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
- rdata->iov.iov_base, rdata->iov.iov_len);
+ rdata->iov[0].iov_base = buf;
+ rdata->iov[0].iov_len = 4;
+ rdata->iov[1].iov_base = buf + 4;
+ rdata->iov[1].iov_len = server->total_read - 4;
+ cifs_dbg(FYI, "0: iov_base=%p iov_len=%u\n",
+ rdata->iov[0].iov_base, server->total_read);
/* how much data is in the response? */
data_len = server->ops->read_data_length(buf);
@@ -1543,8 +1550,8 @@ cifs_readv_callback(struct mid_q_entry *mid)
struct cifs_readdata *rdata = mid->callback_data;
struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
struct TCP_Server_Info *server = tcon->ses->server;
- struct smb_rqst rqst = { .rq_iov = &rdata->iov,
- .rq_nvec = 1,
+ struct smb_rqst rqst = { .rq_iov = rdata->iov,
+ .rq_nvec = 2,
.rq_pages = rdata->pages,
.rq_npages = rdata->nr_pages,
.rq_pagesz = rdata->pagesz,
@@ -1599,8 +1606,8 @@ cifs_async_readv(struct cifs_readdata *rdata)
READ_REQ *smb = NULL;
int wct;
struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
- struct smb_rqst rqst = { .rq_iov = &rdata->iov,
- .rq_nvec = 1 };
+ struct smb_rqst rqst = { .rq_iov = rdata->iov,
+ .rq_nvec = 2 };
cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
__func__, rdata->offset, rdata->bytes);
@@ -1640,12 +1647,14 @@ cifs_async_readv(struct cifs_readdata *rdata)
}
/* 4 for RFC1001 length + 1 for BCC */
- rdata->iov.iov_base = smb;
- rdata->iov.iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4;
+ rdata->iov[0].iov_base = smb;
+ rdata->iov[0].iov_len = 4;
+ rdata->iov[1].iov_base = (char *)smb + 4;
+ rdata->iov[1].iov_len = get_rfc1002_length(smb);
kref_get(&rdata->refcount);
rc = cifs_call_async(tcon->ses->server, &rqst, cifs_readv_receive,
- cifs_readv_callback, rdata, 0);
+ cifs_readv_callback, NULL, rdata, 0);
if (rc == 0)
cifs_stats_inc(&tcon->stats.cifs_stats.num_reads);
@@ -1667,6 +1676,7 @@ CIFSSMBRead(const unsigned int xid, struct cifs_io_parms *io_parms,
int wct;
int resp_buf_type = 0;
struct kvec iov[1];
+ struct kvec rsp_iov;
__u32 pid = io_parms->pid;
__u16 netfid = io_parms->netfid;
__u64 offset = io_parms->offset;
@@ -1716,10 +1726,11 @@ CIFSSMBRead(const unsigned int xid, struct cifs_io_parms *io_parms,
iov[0].iov_base = (char *)pSMB;
iov[0].iov_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 4;
- rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovecs */,
- &resp_buf_type, CIFS_LOG_ERROR);
+ rc = SendReceive2(xid, tcon->ses, iov, 1, &resp_buf_type,
+ CIFS_LOG_ERROR, &rsp_iov);
+ cifs_small_buf_release(pSMB);
cifs_stats_inc(&tcon->stats.cifs_stats.num_reads);
- pSMBr = (READ_RSP *)iov[0].iov_base;
+ pSMBr = (READ_RSP *)rsp_iov.iov_base;
if (rc) {
cifs_dbg(VFS, "Send error in read = %d\n", rc);
} else {
@@ -1747,12 +1758,11 @@ CIFSSMBRead(const unsigned int xid, struct cifs_io_parms *io_parms,
}
}
-/* cifs_small_buf_release(pSMB); */ /* Freed earlier now in SendReceive2 */
if (*buf) {
- free_rsp_buf(resp_buf_type, iov[0].iov_base);
+ free_rsp_buf(resp_buf_type, rsp_iov.iov_base);
} else if (resp_buf_type != CIFS_NO_BUFFER) {
/* return buffer to caller to free */
- *buf = iov[0].iov_base;
+ *buf = rsp_iov.iov_base;
if (resp_buf_type == CIFS_SMALL_BUFFER)
*pbuf_type = CIFS_SMALL_BUFFER;
else if (resp_buf_type == CIFS_LARGE_BUFFER)
@@ -2093,7 +2103,7 @@ cifs_async_writev(struct cifs_writedata *wdata,
WRITE_REQ *smb = NULL;
int wct;
struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
- struct kvec iov;
+ struct kvec iov[2];
struct smb_rqst rqst = { };
if (tcon->ses->capabilities & CAP_LARGE_FILES) {
@@ -2126,11 +2136,13 @@ cifs_async_writev(struct cifs_writedata *wdata,
cpu_to_le16(offsetof(struct smb_com_write_req, Data) - 4);
/* 4 for RFC1001 length + 1 for BCC */
- iov.iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4 + 1;
- iov.iov_base = smb;
+ iov[0].iov_len = 4;
+ iov[0].iov_base = smb;
+ iov[1].iov_len = get_rfc1002_length(smb) + 1;
+ iov[1].iov_base = (char *)smb + 4;
- rqst.rq_iov = &iov;
- rqst.rq_nvec = 1;
+ rqst.rq_iov = iov;
+ rqst.rq_nvec = 2;
rqst.rq_pages = wdata->pages;
rqst.rq_npages = wdata->nr_pages;
rqst.rq_pagesz = wdata->pagesz;
@@ -2151,12 +2163,12 @@ cifs_async_writev(struct cifs_writedata *wdata,
(struct smb_com_writex_req *)smb;
inc_rfc1001_len(&smbw->hdr, wdata->bytes + 5);
put_bcc(wdata->bytes + 5, &smbw->hdr);
- iov.iov_len += 4; /* pad bigger by four bytes */
+ iov[1].iov_len += 4; /* pad bigger by four bytes */
}
kref_get(&wdata->refcount);
rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
- cifs_writev_callback, wdata, 0);
+ cifs_writev_callback, NULL, wdata, 0);
if (rc == 0)
cifs_stats_inc(&tcon->stats.cifs_stats.num_writes);
@@ -2182,6 +2194,7 @@ CIFSSMBWrite2(const unsigned int xid, struct cifs_io_parms *io_parms,
__u64 offset = io_parms->offset;
struct cifs_tcon *tcon = io_parms->tcon;
unsigned int count = io_parms->length;
+ struct kvec rsp_iov;
*nbytes = 0;
@@ -2240,8 +2253,9 @@ CIFSSMBWrite2(const unsigned int xid, struct cifs_io_parms *io_parms,
else /* wct == 12 pad bigger by four bytes */
iov[0].iov_len = smb_hdr_len + 8;
-
- rc = SendReceive2(xid, tcon->ses, iov, n_vec + 1, &resp_buf_type, 0);
+ rc = SendReceive2(xid, tcon->ses, iov, n_vec + 1, &resp_buf_type, 0,
+ &rsp_iov);
+ cifs_small_buf_release(pSMB);
cifs_stats_inc(&tcon->stats.cifs_stats.num_writes);
if (rc) {
cifs_dbg(FYI, "Send error Write2 = %d\n", rc);
@@ -2249,7 +2263,7 @@ CIFSSMBWrite2(const unsigned int xid, struct cifs_io_parms *io_parms,
/* presumably this can not happen, but best to be safe */
rc = -EIO;
} else {
- WRITE_RSP *pSMBr = (WRITE_RSP *)iov[0].iov_base;
+ WRITE_RSP *pSMBr = (WRITE_RSP *)rsp_iov.iov_base;
*nbytes = le16_to_cpu(pSMBr->CountHigh);
*nbytes = (*nbytes) << 16;
*nbytes += le16_to_cpu(pSMBr->Count);
@@ -2263,8 +2277,7 @@ CIFSSMBWrite2(const unsigned int xid, struct cifs_io_parms *io_parms,
*nbytes &= 0xFFFF;
}
-/* cifs_small_buf_release(pSMB); */ /* Freed earlier now in SendReceive2 */
- free_rsp_buf(resp_buf_type, iov[0].iov_base);
+ free_rsp_buf(resp_buf_type, rsp_iov.iov_base);
/* Note: On -EAGAIN error only caller can retry on handle based calls
since file handle passed in no longer valid */
@@ -2279,6 +2292,7 @@ int cifs_lockv(const unsigned int xid, struct cifs_tcon *tcon,
int rc = 0;
LOCK_REQ *pSMB = NULL;
struct kvec iov[2];
+ struct kvec rsp_iov;
int resp_buf_type;
__u16 count;
@@ -2307,7 +2321,9 @@ int cifs_lockv(const unsigned int xid, struct cifs_tcon *tcon,
iov[1].iov_len = (num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE);
cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
- rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
+ rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP,
+ &rsp_iov);
+ cifs_small_buf_release(pSMB);
if (rc)
cifs_dbg(FYI, "Send error in cifs_lockv = %d\n", rc);
@@ -2368,14 +2384,12 @@ CIFSSMBLock(const unsigned int xid, struct cifs_tcon *tcon,
inc_rfc1001_len(pSMB, count);
pSMB->ByteCount = cpu_to_le16(count);
- if (waitFlag) {
+ if (waitFlag)
rc = SendReceiveBlockingLock(xid, tcon, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMB, &bytes_returned);
- cifs_small_buf_release(pSMB);
- } else {
+ else
rc = SendReceiveNoRsp(xid, tcon->ses, (char *)pSMB, flags);
- /* SMB buffer freed by function above */
- }
+ cifs_small_buf_release(pSMB);
cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
if (rc)
cifs_dbg(FYI, "Send error in Lock = %d\n", rc);
@@ -2401,6 +2415,7 @@ CIFSSMBPosixLock(const unsigned int xid, struct cifs_tcon *tcon,
int resp_buf_type = 0;
__u16 params, param_offset, offset, byte_count, count;
struct kvec iov[1];
+ struct kvec rsp_iov;
cifs_dbg(FYI, "Posix Lock\n");
@@ -2462,11 +2477,10 @@ CIFSSMBPosixLock(const unsigned int xid, struct cifs_tcon *tcon,
iov[0].iov_base = (char *)pSMB;
iov[0].iov_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 4;
rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovecs */,
- &resp_buf_type, timeout);
- pSMB = NULL; /* request buf already freed by SendReceive2. Do
- not try to free it twice below on exit */
- pSMBr = (struct smb_com_transaction2_sfi_rsp *)iov[0].iov_base;
+ &resp_buf_type, timeout, &rsp_iov);
+ pSMBr = (struct smb_com_transaction2_sfi_rsp *)rsp_iov.iov_base;
}
+ cifs_small_buf_release(pSMB);
if (rc) {
cifs_dbg(FYI, "Send error in Posix Lock = %d\n", rc);
@@ -2506,10 +2520,7 @@ CIFSSMBPosixLock(const unsigned int xid, struct cifs_tcon *tcon,
}
plk_err_exit:
- if (pSMB)
- cifs_small_buf_release(pSMB);
-
- free_rsp_buf(resp_buf_type, iov[0].iov_base);
+ free_rsp_buf(resp_buf_type, rsp_iov.iov_base);
/* Note: On -EAGAIN error only caller can retry on handle based calls
since file handle passed in no longer valid */
@@ -2536,6 +2547,7 @@ CIFSSMBClose(const unsigned int xid, struct cifs_tcon *tcon, int smb_file_id)
pSMB->LastWriteTime = 0xFFFFFFFF;
pSMB->ByteCount = 0;
rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+ cifs_small_buf_release(pSMB);
cifs_stats_inc(&tcon->stats.cifs_stats.num_closes);
if (rc) {
if (rc != -EINTR) {
@@ -2565,6 +2577,7 @@ CIFSSMBFlush(const unsigned int xid, struct cifs_tcon *tcon, int smb_file_id)
pSMB->FileID = (__u16) smb_file_id;
pSMB->ByteCount = 0;
rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+ cifs_small_buf_release(pSMB);
cifs_stats_inc(&tcon->stats.cifs_stats.num_flushes);
if (rc)
cifs_dbg(VFS, "Send error in Flush = %d\n", rc);
@@ -3820,6 +3833,7 @@ CIFSSMBGetCIFSACL(const unsigned int xid, struct cifs_tcon *tcon, __u16 fid,
int buf_type = 0;
QUERY_SEC_DESC_REQ *pSMB;
struct kvec iov[1];
+ struct kvec rsp_iov;
cifs_dbg(FYI, "GetCifsACL\n");
@@ -3843,7 +3857,8 @@ CIFSSMBGetCIFSACL(const unsigned int xid, struct cifs_tcon *tcon, __u16 fid,
iov[0].iov_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 4;
rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovec */, &buf_type,
- 0);
+ 0, &rsp_iov);
+ cifs_small_buf_release(pSMB);
cifs_stats_inc(&tcon->stats.cifs_stats.num_acl_get);
if (rc) {
cifs_dbg(FYI, "Send error in QuerySecDesc = %d\n", rc);
@@ -3855,11 +3870,11 @@ CIFSSMBGetCIFSACL(const unsigned int xid, struct cifs_tcon *tcon, __u16 fid,
char *pdata;
/* validate_nttransact */
- rc = validate_ntransact(iov[0].iov_base, (char **)&parm,
+ rc = validate_ntransact(rsp_iov.iov_base, (char **)&parm,
&pdata, &parm_len, pbuflen);
if (rc)
goto qsec_out;
- pSMBr = (struct smb_com_ntransact_rsp *)iov[0].iov_base;
+ pSMBr = (struct smb_com_ntransact_rsp *)rsp_iov.iov_base;
cifs_dbg(FYI, "smb %p parm %p data %p\n",
pSMBr, parm, *acl_inf);
@@ -3896,8 +3911,7 @@ CIFSSMBGetCIFSACL(const unsigned int xid, struct cifs_tcon *tcon, __u16 fid,
}
}
qsec_out:
- free_rsp_buf(buf_type, iov[0].iov_base);
-/* cifs_small_buf_release(pSMB); */ /* Freed earlier now in SendReceive2 */
+ free_rsp_buf(buf_type, rsp_iov.iov_base);
return rc;
}
@@ -4666,6 +4680,7 @@ CIFSFindClose(const unsigned int xid, struct cifs_tcon *tcon,
pSMB->FileID = searchHandle;
pSMB->ByteCount = 0;
rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+ cifs_small_buf_release(pSMB);
if (rc)
cifs_dbg(VFS, "Send error in FindClose = %d\n", rc);
@@ -5687,6 +5702,7 @@ CIFSSMBSetFileSize(const unsigned int xid, struct cifs_tcon *tcon,
inc_rfc1001_len(pSMB, byte_count);
pSMB->ByteCount = cpu_to_le16(byte_count);
rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+ cifs_small_buf_release(pSMB);
if (rc) {
cifs_dbg(FYI, "Send error in SetFileInfo (SetFileSize) = %d\n",
rc);
@@ -5758,6 +5774,7 @@ CIFSSMBSetFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
pSMB->ByteCount = cpu_to_le16(byte_count);
memcpy(data_offset, data, sizeof(FILE_BASIC_INFO));
rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+ cifs_small_buf_release(pSMB);
if (rc)
cifs_dbg(FYI, "Send error in Set Time (SetFileInfo) = %d\n",
rc);
@@ -5818,6 +5835,7 @@ CIFSSMBSetFileDisposition(const unsigned int xid, struct cifs_tcon *tcon,
pSMB->ByteCount = cpu_to_le16(byte_count);
*data_offset = delete_file ? 1 : 0;
rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+ cifs_small_buf_release(pSMB);
if (rc)
cifs_dbg(FYI, "Send error in SetFileDisposition = %d\n", rc);
@@ -6057,6 +6075,7 @@ CIFSSMBUnixSetFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
cifs_fill_unix_set_info((FILE_UNIX_BASIC_INFO *)data_offset, args);
rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+ cifs_small_buf_release(pSMB);
if (rc)
cifs_dbg(FYI, "Send error in Set Time (SetFileInfo) = %d\n",
rc);
generated by cgit (git 2.34.1) at 2024-05-26 00:11:12 +0000