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[CIFS] acl support part 6

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Acked-by: Shirish Pargaonkar <shirishp@us.ibm.com>
CC: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French
2007-10-25 21:17:17 +00:00
parent 44093ca2fe
commit 630f3f0c45
10 changed files with 169 additions and 60 deletions
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55
fs/cifs/cifssmb.c
View File

@@ -2526,12 +2526,15 @@ smb_init_ntransact(const __u16 sub_command, const int setup_count,
static int
validate_ntransact(char *buf, char **ppparm, char **ppdata,
int *pdatalen, int *pparmlen)
__u32 *pdatalen, __u32 *pparmlen)
{
char *end_of_smb;
__u32 data_count, data_offset, parm_count, parm_offset;
struct smb_com_ntransact_rsp *pSMBr;
*pdatalen = 0;
*pparmlen = 0;
if (buf == NULL)
return -EINVAL;
@@ -2568,6 +2571,8 @@ validate_ntransact(char *buf, char **ppparm, char **ppdata,
cFYI(1, ("parm count and data count larger than SMB"));
return -EINVAL;
}
*pdatalen = data_count;
*pparmlen = parm_count;
return 0;
}
#endif /* CIFS_EXPERIMENTAL */
@@ -3069,8 +3074,7 @@ GetExtAttrOut:
/* Get Security Descriptor (by handle) from remote server for a file or dir */
int
CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
/* BB fix up return info */ char *acl_inf, const int buflen,
const int acl_type)
struct cifs_ntsd **acl_inf, __u32 *pbuflen)
{
int rc = 0;
int buf_type = 0;
@@ -3079,6 +3083,9 @@ CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
cFYI(1, ("GetCifsACL"));
*pbuflen = 0;
*acl_inf = NULL;
rc = smb_init_ntransact(NT_TRANSACT_QUERY_SECURITY_DESC, 0,
8 /* parm len */, tcon, (void **) &pSMB);
if (rc)
@@ -3101,34 +3108,52 @@ CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
if (rc) {
cFYI(1, ("Send error in QuerySecDesc = %d", rc));
} else { /* decode response */
struct cifs_ntsd *psec_desc;
__le32 * parm;
int parm_len;
int data_len;
int acl_len;
__u32 parm_len;
__u32 acl_len;
struct smb_com_ntransact_rsp *pSMBr;
char *pdata;
/* validate_nttransact */
rc = validate_ntransact(iov[0].iov_base, (char **)&parm,
(char **)&psec_desc,
&parm_len, &data_len);
&pdata, &parm_len, pbuflen);
if (rc)
goto qsec_out;
pSMBr = (struct smb_com_ntransact_rsp *)iov[0].iov_base;
cFYI(1, ("smb %p parm %p data %p", pSMBr, parm, psec_desc));
cFYI(1, ("smb %p parm %p data %p", pSMBr, parm, *acl_inf));
if (le32_to_cpu(pSMBr->ParameterCount) != 4) {
rc = -EIO; /* bad smb */
*pbuflen = 0;
goto qsec_out;
}
/* BB check that data area is minimum length and as big as acl_len */
acl_len = le32_to_cpu(*parm);
/* BB check if (acl_len > bufsize) */
if (acl_len != *pbuflen) {
cERROR(1, ("acl length %d does not match %d",
acl_len, *pbuflen));
if (*pbuflen > acl_len)
*pbuflen = acl_len;
}
parse_sec_desc(psec_desc, acl_len);
/* check if buffer is big enough for the acl
header followed by the smallest SID */
if ((*pbuflen < sizeof(struct cifs_ntsd) + 8) ||
(*pbuflen >= 64 * 1024)) {
cERROR(1, ("bad acl length %d", *pbuflen));
rc = -EINVAL;
*pbuflen = 0;
} else {
*acl_inf = kmalloc(*pbuflen, GFP_KERNEL);
if (*acl_inf == NULL) {
*pbuflen = 0;
rc = -ENOMEM;
}
memcpy(*acl_inf, pdata, *pbuflen);
}
}
qsec_out:
if (buf_type == CIFS_SMALL_BUFFER)
@@ -3383,7 +3408,7 @@ UnixQPathInfoRetry:
memcpy((char *) pFindData,
(char *) &pSMBr->hdr.Protocol +
data_offset,
sizeof (FILE_UNIX_BASIC_INFO));
sizeof(FILE_UNIX_BASIC_INFO));
}
}
cifs_buf_release(pSMB);
@@ -3651,7 +3676,7 @@ int CIFSFindNext(const int xid, struct cifsTconInfo *tcon,
pSMB->SubCommand = cpu_to_le16(TRANS2_FIND_NEXT);
pSMB->SearchHandle = searchHandle; /* always kept as le */
pSMB->SearchCount =
cpu_to_le16(CIFSMaxBufSize / sizeof (FILE_UNIX_INFO));
cpu_to_le16(CIFSMaxBufSize / sizeof(FILE_UNIX_INFO));
pSMB->InformationLevel = cpu_to_le16(psrch_inf->info_level);
pSMB->ResumeKey = psrch_inf->resume_key;
pSMB->SearchFlags =
@@ -4333,7 +4358,7 @@ QFSDeviceRetry:
} else { /* decode response */
rc = validate_t2((struct smb_t2_rsp *)pSMBr);
if (rc || (pSMBr->ByteCount < sizeof (FILE_SYSTEM_DEVICE_INFO)))
if (rc || (pSMBr->ByteCount < sizeof(FILE_SYSTEM_DEVICE_INFO)))
rc = -EIO; /* bad smb */
else {
__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);