[CIFS] Finishup DFS code
Fixup GetDFSRefer to prepare for cleanup of SMB response processing Fix build warning in link.c Signed-off-by: Steve French <sfrench@us.ibm.com>
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Steve French
parent
f9ddcca4cf
commit
c2cf07d591
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@ -146,8 +146,8 @@ extern int CIFSSMBUnixQPathInfo(const int xid,
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extern int CIFSGetDFSRefer(const int xid, struct cifsSesInfo *ses,
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const unsigned char *searchName,
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unsigned char **targetUNCs,
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unsigned int *number_of_UNC_in_array,
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struct dfs_info3_param **target_nodes,
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unsigned int *number_of_nodes_in_array,
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const struct nls_table *nls_codepage, int remap);
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extern int get_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
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@ -3870,8 +3870,8 @@ GetInodeNumOut:
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int
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CIFSGetDFSRefer(const int xid, struct cifsSesInfo *ses,
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const unsigned char *searchName,
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unsigned char **targetUNCs,
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unsigned int *number_of_UNC_in_array,
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struct dfs_info3_param **target_nodes,
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unsigned int *num_of_nodes,
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const struct nls_table *nls_codepage, int remap)
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{
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/* TRANS2_GET_DFS_REFERRAL */
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@ -3884,8 +3884,8 @@ CIFSGetDFSRefer(const int xid, struct cifsSesInfo *ses,
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unsigned int i;
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char *temp;
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__u16 params, byte_count;
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*number_of_UNC_in_array = 0;
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*targetUNCs = NULL;
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*num_of_nodes = 0;
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*target_nodes = NULL;
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cFYI(1, ("In GetDFSRefer the path %s", searchName));
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if (ses == NULL)
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@ -3955,99 +3955,84 @@ getDFSRetry:
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(struct smb_hdr *) pSMBr, &bytes_returned, 0);
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if (rc) {
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cFYI(1, ("Send error in GetDFSRefer = %d", rc));
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} else { /* decode response */
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/* BB Add logic to parse referrals here */
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rc = validate_t2((struct smb_t2_rsp *)pSMBr);
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goto GetDFSRefExit;
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}
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rc = validate_t2((struct smb_t2_rsp *)pSMBr);
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/* BB Also check if enough total bytes returned? */
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if (rc || (pSMBr->ByteCount < 17))
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rc = -EIO; /* bad smb */
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else {
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__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
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__u16 data_count = le16_to_cpu(pSMBr->t2.DataCount);
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/* BB Also check if enough total bytes returned? */
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if (rc || (pSMBr->ByteCount < 17))
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rc = -EIO; /* bad smb */
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else {
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__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
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__u16 data_count = le16_to_cpu(pSMBr->t2.DataCount);
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cFYI(1,
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("Decoding GetDFSRefer response BCC: %d Offset %d",
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pSMBr->ByteCount, data_offset));
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referrals =
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(struct dfs_referral_level_3 *)
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(8 /* sizeof start of data block */ +
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data_offset +
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(char *) &pSMBr->hdr.Protocol);
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cFYI(1, ("num_referrals: %d dfs flags: 0x%x ... \n"
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"for referral one refer size: 0x%x srv "
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"type: 0x%x refer flags: 0x%x ttl: 0x%x",
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le16_to_cpu(pSMBr->NumberOfReferrals),
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le16_to_cpu(pSMBr->DFSFlags),
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le16_to_cpu(referrals->ReferralSize),
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le16_to_cpu(referrals->ServerType),
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le16_to_cpu(referrals->ReferralFlags),
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le16_to_cpu(referrals->TimeToLive)));
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/* BB This field is actually two bytes in from start of
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data block so we could do safety check that DataBlock
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begins at address of pSMBr->NumberOfReferrals */
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*number_of_UNC_in_array =
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le16_to_cpu(pSMBr->NumberOfReferrals);
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cFYI(1, ("Decoding GetDFSRefer response BCC: %d Offset %d",
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pSMBr->ByteCount, data_offset));
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referrals =
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(struct dfs_referral_level_3 *)
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(8 /* sizeof start of data block */ +
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data_offset +
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(char *) &pSMBr->hdr.Protocol);
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cFYI(1, ("num_referrals: %d dfs flags: 0x%x ... \n"
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"for referral one refer size: 0x%x srv "
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"type: 0x%x refer flags: 0x%x ttl: 0x%x",
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le16_to_cpu(pSMBr->NumberOfReferrals),
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le16_to_cpu(pSMBr->DFSFlags),
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le16_to_cpu(referrals->ReferralSize),
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le16_to_cpu(referrals->ServerType),
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le16_to_cpu(referrals->ReferralFlags),
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le16_to_cpu(referrals->TimeToLive)));
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/* BB This field is actually two bytes in from start of
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data block so we could do safety check that DataBlock
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begins at address of pSMBr->NumberOfReferrals */
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*num_of_nodes = le16_to_cpu(pSMBr->NumberOfReferrals);
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/* BB Fix below so can return more than one referral */
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if (*number_of_UNC_in_array > 1)
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*number_of_UNC_in_array = 1;
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/* BB Fix below so can return more than one referral */
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if (*num_of_nodes > 1)
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*num_of_nodes = 1;
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/* get the length of the strings describing refs */
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name_len = 0;
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for (i = 0; i < *number_of_UNC_in_array; i++) {
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/* make sure that DfsPathOffset not past end */
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__u16 offset =
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le16_to_cpu(referrals->DfsPathOffset);
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if (offset > data_count) {
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/* if invalid referral, stop here and do
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not try to copy any more */
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*number_of_UNC_in_array = i;
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break;
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}
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temp = ((char *)referrals) + offset;
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if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) {
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name_len += UniStrnlen((wchar_t *)temp,
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data_count);
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} else {
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name_len += strnlen(temp, data_count);
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}
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referrals++;
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/* BB add check that referral pointer does
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not fall off end PDU */
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/* get the length of the strings describing refs */
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name_len = 0;
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for (i = 0; i < *num_of_nodes; i++) {
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/* make sure that DfsPathOffset not past end */
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__u16 offset = le16_to_cpu(referrals->DfsPathOffset);
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if (offset > data_count) {
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/* if invalid referral, stop here and do
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not try to copy any more */
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*num_of_nodes = i;
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break;
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}
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/* BB add check for name_len bigger than bcc */
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*targetUNCs =
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kmalloc(name_len+1+(*number_of_UNC_in_array),
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GFP_KERNEL);
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if (*targetUNCs == NULL) {
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rc = -ENOMEM;
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goto GetDFSRefExit;
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}
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/* copy the ref strings */
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referrals = (struct dfs_referral_level_3 *)
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(8 /* sizeof data hdr */ + data_offset +
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(char *) &pSMBr->hdr.Protocol);
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temp = ((char *)referrals) + offset;
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for (i = 0; i < *number_of_UNC_in_array; i++) {
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temp = ((char *)referrals) +
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le16_to_cpu(referrals->DfsPathOffset);
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if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) {
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cifs_strfromUCS_le(*targetUNCs,
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(__le16 *) temp,
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name_len,
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nls_codepage);
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} else {
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strncpy(*targetUNCs, temp, name_len);
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}
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/* BB update target_uncs pointers */
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referrals++;
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if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) {
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name_len += UniStrnlen((wchar_t *)temp,
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data_count);
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} else {
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name_len += strnlen(temp, data_count);
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}
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temp = *targetUNCs;
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temp[name_len] = 0;
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referrals++;
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/* BB add check that referral pointer does
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not fall off end PDU */
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}
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/* BB add check for name_len bigger than bcc */
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*target_nodes =
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kmalloc(name_len+1+(*num_of_nodes),
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GFP_KERNEL);
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if (*target_nodes == NULL) {
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rc = -ENOMEM;
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goto GetDFSRefExit;
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}
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referrals = (struct dfs_referral_level_3 *)
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(8 /* sizeof data hdr */ + data_offset +
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(char *) &pSMBr->hdr.Protocol);
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for (i = 0; i < *num_of_nodes; i++) {
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temp = ((char *)referrals) +
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le16_to_cpu(referrals->DfsPathOffset);
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/* BB update target_uncs pointers */
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referrals++;
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}
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}
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GetDFSRefExit:
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if (pSMB)
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@ -1425,7 +1425,6 @@ get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
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{
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char *temp_unc;
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int rc = 0;
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unsigned char *targetUNCs;
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*pnum_referrals = 0;
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*preferrals = NULL;
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@ -1448,7 +1447,7 @@ get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
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kfree(temp_unc);
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}
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if (rc == 0)
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rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, &targetUNCs,
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rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
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pnum_referrals, nls_codepage, remap);
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/* BB map targetUNCs to dfs_info3 structures, here or
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in CIFSGetDFSRefer BB */
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@ -234,7 +234,6 @@ cifs_readlink(struct dentry *direntry, char __user *pBuffer, int buflen)
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struct cifs_sb_info *cifs_sb;
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struct cifsTconInfo *pTcon;
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char *full_path = NULL;
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char *tmp_path = NULL;
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char *tmpbuffer;
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int len;
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__u16 fid;
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