Commit c8634fd3 authored by Jeff Layton's avatar Jeff Layton Committed by Steve French
Browse files

cifs: add a CIFSSMBUnixQFileInfo function 



...to allow us to get unix attrs via filehandle.

Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarSteve French <sfrench@us.ibm.com>
parent bcd5357f

fs/cifs/cifsproto.h

+2 −0
Original line number Diff line number Diff line
@@ -154,6 +154,8 @@ extern int SMBQueryInformation(const int xid, struct cifsTconInfo *tcon, 
			FILE_ALL_INFO *findData,

			const struct nls_table *nls_codepage, int remap);



extern int CIFSSMBUnixQFileInfo(const int xid, struct cifsTconInfo *tcon,

			u16 netfid, FILE_UNIX_BASIC_INFO *pFindData);

extern int CIFSSMBUnixQPathInfo(const int xid,

			struct cifsTconInfo *tcon,

			const unsigned char *searchName,

fs/cifs/cifssmb.c

+69 −0
Original line number Diff line number Diff line
@@ -3398,6 +3398,75 @@ CIFSSMBQPathInfo(const int xid, struct cifsTconInfo *tcon, 
	return rc;

}



int

CIFSSMBUnixQFileInfo(const int xid, struct cifsTconInfo *tcon,

		 u16 netfid, FILE_UNIX_BASIC_INFO *pFindData)

{

	struct smb_t2_qfi_req *pSMB = NULL;

	struct smb_t2_qfi_rsp *pSMBr = NULL;

	int rc = 0;

	int bytes_returned;

	__u16 params, byte_count;



UnixQFileInfoRetry:

	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,

		      (void **) &pSMBr);

	if (rc)

		return rc;



	params = 2 /* level */ + 2 /* fid */;

	pSMB->t2.TotalDataCount = 0;

	pSMB->t2.MaxParameterCount = cpu_to_le16(4);

	/* BB find exact max data count below from sess structure BB */

	pSMB->t2.MaxDataCount = cpu_to_le16(CIFSMaxBufSize);

	pSMB->t2.MaxSetupCount = 0;

	pSMB->t2.Reserved = 0;

	pSMB->t2.Flags = 0;

	pSMB->t2.Timeout = 0;

	pSMB->t2.Reserved2 = 0;

	pSMB->t2.ParameterOffset = cpu_to_le16(offsetof(struct smb_t2_qfi_req,

					       Fid) - 4);

	pSMB->t2.DataCount = 0;

	pSMB->t2.DataOffset = 0;

	pSMB->t2.SetupCount = 1;

	pSMB->t2.Reserved3 = 0;

	pSMB->t2.SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION);

	byte_count = params + 1 /* pad */ ;

	pSMB->t2.TotalParameterCount = cpu_to_le16(params);

	pSMB->t2.ParameterCount = pSMB->t2.TotalParameterCount;

	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC);

	pSMB->Pad = 0;

	pSMB->Fid = netfid;

	pSMB->hdr.smb_buf_length += byte_count;



	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,

			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);

	if (rc) {

		cFYI(1, ("Send error in QPathInfo = %d", rc));

	} else {		/* decode response */

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



		if (rc || (pSMBr->ByteCount < sizeof(FILE_UNIX_BASIC_INFO))) {

			cERROR(1, ("Malformed FILE_UNIX_BASIC_INFO response.\n"

				   "Unix Extensions can be disabled on mount "

				   "by specifying the nosfu mount option."));

			rc = -EIO;	/* bad smb */

		} else {

			__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);

			memcpy((char *) pFindData,

			       (char *) &pSMBr->hdr.Protocol +

			       data_offset,

			       sizeof(FILE_UNIX_BASIC_INFO));

		}

	}



	cifs_buf_release(pSMB);

	if (rc == -EAGAIN)

		goto UnixQFileInfoRetry;



	return rc;

}



int

CIFSSMBUnixQPathInfo(const int xid, struct cifsTconInfo *tcon,

		     const unsigned char *searchName,