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Commit c2cf07d5 authored by Steve French's avatar Steve French
Browse files

[CIFS] Finishup DFS code 



Fixup GetDFSRefer to prepare for cleanup of SMB response processing
Fix build warning in link.c

Signed-off-by: default avatarSteve French <sfrench@us.ibm.com>
parent f9ddcca4

fs/cifs/cifsproto.h

+2 −2
Original line number Diff line number Diff line
@@ -146,8 +146,8 @@ extern int CIFSSMBUnixQPathInfo(const int xid, 


extern 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 *number_of_nodes_in_array,

			const struct nls_table *nls_codepage, int remap);



extern int get_dfs_path(int xid, struct cifsSesInfo *pSesInfo,

fs/cifs/cifssmb.c

+77 −92
Original line number Diff line number Diff line
@@ -3870,8 +3870,8 @@ CIFSGetSrvInodeNumber(const int xid, struct cifsTconInfo *tcon, 
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)
@@ -3955,8 +3955,8 @@ CIFSGetDFSRefer(const int xid, struct cifsSesInfo *ses, 
			 (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 */

		goto GetDFSRefExit;

	}

	rc = validate_t2((struct smb_t2_rsp *)pSMBr);



	/* BB Also check if enough total bytes returned? */
@@ -3966,8 +3966,7 @@ CIFSGetDFSRefer(const int xid, struct cifsSesInfo *ses, 
		__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",

		cFYI(1, ("Decoding GetDFSRefer response BCC: %d  Offset %d",

			 pSMBr->ByteCount, data_offset));

		referrals =

		    (struct dfs_referral_level_3 *)
@@ -3986,23 +3985,21 @@ CIFSGetDFSRefer(const int xid, struct cifsSesInfo *ses, 
		/* 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);

		*num_of_nodes = 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;

		if (*num_of_nodes > 1)

			*num_of_nodes = 1;



		/* get the length of the strings describing refs */

		name_len = 0;

			for (i = 0; i < *number_of_UNC_in_array; i++) {

		for (i = 0; i < *num_of_nodes; i++) {

			/* make sure that DfsPathOffset not past end */

				__u16 offset =

					le16_to_cpu(referrals->DfsPathOffset);

			__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;

				*num_of_nodes = i;

				break;

			}

			temp = ((char *)referrals) + offset;
@@ -4018,36 +4015,24 @@ CIFSGetDFSRefer(const int xid, struct cifsSesInfo *ses, 
			   not fall off end PDU */

		}

		/* BB add check for name_len bigger than bcc */

			*targetUNCs =

				kmalloc(name_len+1+(*number_of_UNC_in_array),

		*target_nodes =

			kmalloc(name_len+1+(*num_of_nodes),

				GFP_KERNEL);

			if (*targetUNCs == NULL) {

		if (*target_nodes == NULL) {

			rc = -ENOMEM;

			goto GetDFSRefExit;

		}

			/* 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++) {

		for (i = 0; i < *num_of_nodes; 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 = *targetUNCs;

			temp[name_len] = 0;

		}



	}

GetDFSRefExit:

	if (pSMB)

fs/cifs/connect.c

+1 −2
Original line number Diff line number Diff line
@@ -1425,7 +1425,6 @@ get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path, 
{

	char *temp_unc;

	int rc = 0;

	unsigned char *targetUNCs;



	*pnum_referrals = 0;

	*preferrals = NULL;
@@ -1448,7 +1447,7 @@ get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path, 
		kfree(temp_unc);

	}

	if (rc == 0)

		rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, &targetUNCs,

		rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,

				     pnum_referrals, nls_codepage, remap);

	/* BB map targetUNCs to dfs_info3 structures, here or

		in CIFSGetDFSRefer BB */

fs/cifs/link.c

+0 −1
Original line number Diff line number Diff line
@@ -234,7 +234,6 @@ cifs_readlink(struct dentry *direntry, char __user *pBuffer, int buflen) 
	struct cifs_sb_info *cifs_sb;

	struct cifsTconInfo *pTcon;

	char *full_path = NULL;

	char *tmp_path = NULL;

	char *tmpbuffer;

	int len;

	__u16 fid;