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-rw-r--r--fs/cifs/cifssmb.c169
1 files changed, 77 insertions, 92 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 9c04ad404553..fc297383cb0e 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -3870,8 +3870,8 @@ GetInodeNumOut:
int
CIFSGetDFSRefer(const int xid, struct cifsSesInfo *ses,
const unsigned char *searchName,
- unsigned char **targetUNCs,
- unsigned int *number_of_UNC_in_array,
+ struct dfs_info3_param **target_nodes,
+ unsigned int *num_of_nodes,
const struct nls_table *nls_codepage, int remap)
{
/* TRANS2_GET_DFS_REFERRAL */
@@ -3884,8 +3884,8 @@ CIFSGetDFSRefer(const int xid, struct cifsSesInfo *ses,
unsigned int i;
char *temp;
__u16 params, byte_count;
- *number_of_UNC_in_array = 0;
- *targetUNCs = NULL;
+ *num_of_nodes = 0;
+ *target_nodes = NULL;
cFYI(1, ("In GetDFSRefer the path %s", searchName));
if (ses == NULL)
@@ -3955,99 +3955,84 @@ getDFSRetry:
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
if (rc) {
cFYI(1, ("Send error in GetDFSRefer = %d", rc));
- } else { /* decode response */
-/* BB Add logic to parse referrals here */
- rc = validate_t2((struct smb_t2_rsp *)pSMBr);
-
- /* BB Also check if enough total bytes returned? */
- if (rc || (pSMBr->ByteCount < 17))
- rc = -EIO; /* bad smb */
- else {
- __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
- __u16 data_count = le16_to_cpu(pSMBr->t2.DataCount);
-
- cFYI(1,
- ("Decoding GetDFSRefer response BCC: %d Offset %d",
- pSMBr->ByteCount, data_offset));
- referrals =
- (struct dfs_referral_level_3 *)
- (8 /* sizeof start of data block */ +
- data_offset +
- (char *) &pSMBr->hdr.Protocol);
- cFYI(1, ("num_referrals: %d dfs flags: 0x%x ... \n"
- "for referral one refer size: 0x%x srv "
- "type: 0x%x refer flags: 0x%x ttl: 0x%x",
- le16_to_cpu(pSMBr->NumberOfReferrals),
- le16_to_cpu(pSMBr->DFSFlags),
- le16_to_cpu(referrals->ReferralSize),
- le16_to_cpu(referrals->ServerType),
- le16_to_cpu(referrals->ReferralFlags),
- le16_to_cpu(referrals->TimeToLive)));
- /* BB This field is actually two bytes in from start of
- data block so we could do safety check that DataBlock
- begins at address of pSMBr->NumberOfReferrals */
- *number_of_UNC_in_array =
- le16_to_cpu(pSMBr->NumberOfReferrals);
-
- /* BB Fix below so can return more than one referral */
- if (*number_of_UNC_in_array > 1)
- *number_of_UNC_in_array = 1;
-
- /* get the length of the strings describing refs */
- name_len = 0;
- for (i = 0; i < *number_of_UNC_in_array; i++) {
- /* make sure that DfsPathOffset not past end */
- __u16 offset =
- le16_to_cpu(referrals->DfsPathOffset);
- if (offset > data_count) {
- /* if invalid referral, stop here and do
- not try to copy any more */
- *number_of_UNC_in_array = i;
- break;
- }
- temp = ((char *)referrals) + offset;
+ goto GetDFSRefExit;
+ }
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
- if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) {
- name_len += UniStrnlen((wchar_t *)temp,
- data_count);
- } else {
- name_len += strnlen(temp, data_count);
- }
- referrals++;
- /* BB add check that referral pointer does
- not fall off end PDU */
- }
- /* BB add check for name_len bigger than bcc */
- *targetUNCs =
- kmalloc(name_len+1+(*number_of_UNC_in_array),
- GFP_KERNEL);
- if (*targetUNCs == NULL) {
- rc = -ENOMEM;
- goto GetDFSRefExit;
+ /* BB Also check if enough total bytes returned? */
+ if (rc || (pSMBr->ByteCount < 17))
+ rc = -EIO; /* bad smb */
+ else {
+ __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+ __u16 data_count = le16_to_cpu(pSMBr->t2.DataCount);
+
+ cFYI(1, ("Decoding GetDFSRefer response BCC: %d Offset %d",
+ pSMBr->ByteCount, data_offset));
+ referrals =
+ (struct dfs_referral_level_3 *)
+ (8 /* sizeof start of data block */ +
+ data_offset +
+ (char *) &pSMBr->hdr.Protocol);
+ cFYI(1, ("num_referrals: %d dfs flags: 0x%x ... \n"
+ "for referral one refer size: 0x%x srv "
+ "type: 0x%x refer flags: 0x%x ttl: 0x%x",
+ le16_to_cpu(pSMBr->NumberOfReferrals),
+ le16_to_cpu(pSMBr->DFSFlags),
+ le16_to_cpu(referrals->ReferralSize),
+ le16_to_cpu(referrals->ServerType),
+ le16_to_cpu(referrals->ReferralFlags),
+ le16_to_cpu(referrals->TimeToLive)));
+ /* BB This field is actually two bytes in from start of
+ data block so we could do safety check that DataBlock
+ begins at address of pSMBr->NumberOfReferrals */
+ *num_of_nodes = le16_to_cpu(pSMBr->NumberOfReferrals);
+
+ /* BB Fix below so can return more than one referral */
+ if (*num_of_nodes > 1)
+ *num_of_nodes = 1;
+
+ /* get the length of the strings describing refs */
+ name_len = 0;
+ for (i = 0; i < *num_of_nodes; i++) {
+ /* make sure that DfsPathOffset not past end */
+ __u16 offset = le16_to_cpu(referrals->DfsPathOffset);
+ if (offset > data_count) {
+ /* if invalid referral, stop here and do
+ not try to copy any more */
+ *num_of_nodes = i;
+ break;
}
- /* copy the ref strings */
- referrals = (struct dfs_referral_level_3 *)
- (8 /* sizeof data hdr */ + data_offset +
- (char *) &pSMBr->hdr.Protocol);
-
- for (i = 0; i < *number_of_UNC_in_array; i++) {
- temp = ((char *)referrals) +
- le16_to_cpu(referrals->DfsPathOffset);
- if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) {
- cifs_strfromUCS_le(*targetUNCs,
- (__le16 *) temp,
- name_len,
- nls_codepage);
- } else {
- strncpy(*targetUNCs, temp, name_len);
- }
- /* BB update target_uncs pointers */
- referrals++;
+ temp = ((char *)referrals) + offset;
+
+ if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len += UniStrnlen((wchar_t *)temp,
+ data_count);
+ } else {
+ name_len += strnlen(temp, data_count);
}
- temp = *targetUNCs;
- temp[name_len] = 0;
+ referrals++;
+ /* BB add check that referral pointer does
+ not fall off end PDU */
+ }
+ /* BB add check for name_len bigger than bcc */
+ *target_nodes =
+ kmalloc(name_len+1+(*num_of_nodes),
+ GFP_KERNEL);
+ if (*target_nodes == NULL) {
+ rc = -ENOMEM;
+ goto GetDFSRefExit;
}
+ referrals = (struct dfs_referral_level_3 *)
+ (8 /* sizeof data hdr */ + data_offset +
+ (char *) &pSMBr->hdr.Protocol);
+
+ for (i = 0; i < *num_of_nodes; i++) {
+ temp = ((char *)referrals) +
+ le16_to_cpu(referrals->DfsPathOffset);
+ /* BB update target_uncs pointers */
+ referrals++;
+ }
}
GetDFSRefExit:
if (pSMB)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-11 13:04:01 +0000