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[CIFS] Allow SMBWrite2 to work to older servers 

Signed-off-by: Steve French (sfrench@us.ibm.com)
This commit is contained in:
Steve French 2005-10-03 13:49:43 -07:00
parent 3e84469d01
commit 8cc64c6ecf
1 changed files with 22 additions and 7 deletions
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29
fs/cifs/cifssmb.c
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@ -1139,11 +1139,15 @@ CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
{
int rc = -EACCES;
WRITE_REQ *pSMB = NULL;
int bytes_returned;
int bytes_returned, wct;
int smb_hdr_len;
cFYI(1,("write2 at %lld %d bytes",offset,count)); /* BB removeme BB */
rc = small_smb_init(SMB_COM_WRITE_ANDX, 14, tcon, (void **) &pSMB);
if(tcon->ses->capabilities & CAP_LARGE_FILES)
wct = 14;
else
wct = 12;
rc = small_smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **) &pSMB);
if (rc)
return rc;
/* tcon and ses pointer are checked in smb_init */
@ -1153,7 +1157,10 @@ CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
pSMB->AndXCommand = 0xFF; /* none */
pSMB->Fid = netfid;
pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF);
pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
if(wct == 14)
pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
else if((offset >> 32) > 0) /* can not handle this big offset for old */
return -EIO;
pSMB->Reserved = 0xFFFFFFFF;
pSMB->WriteMode = 0;
pSMB->Remaining = 0;
@ -1164,9 +1171,17 @@ CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
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 += count+1;
pSMB->ByteCount = cpu_to_le16(count + 1);
if(wct == 14)
pSMB->hdr.smb_buf_length += count+1;
else /* wct == 12 */
pSMB->hdr.smb_buf_length += count+5; /* smb data starts later */
if(wct == 14)
pSMB->ByteCount = cpu_to_le16(count + 1);
else /* wct == 12 */ /* bigger pad, smaller smb hdr, keep offset ok */ {
struct smb_com_writex_req * pSMBW =
(struct smb_com_writex_req *)pSMB;
pSMBW->ByteCount = cpu_to_le16(count + 5);
}
iov[0].iov_base = pSMB;
iov[0].iov_len = smb_hdr_len + 4;
@ -1174,7 +1189,7 @@ CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
long_op);
cifs_stats_inc(&tcon->num_writes);
if (rc) {
cFYI(1, ("Send error in write = %d", rc));
cFYI(1, ("Send error Write2 = %d", rc));
*nbytes = 0;
} else {
WRITE_RSP * pSMBr = (WRITE_RSP *)pSMB;