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cifs: add a CIFSSMBUnixQFileInfo function 

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

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Jeff Layton 2010-02-12 07:44:17 -05:00 committed by Steve French
parent bcd5357f43
commit c8634fd311
2 changed files with 71 additions and 0 deletions
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2
fs/cifs/cifsproto.h
View File

@ -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,

69
fs/cifs/cifssmb.c
View File

@ -3398,6 +3398,75 @@ QPathInfoRetry:
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,