[CIFS] Allow setting mode via cifs acl
Requires cifsacl mount flag to be on and CIFS_EXPERIMENTAL enabled
CC: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 618542b..9409524 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -3156,6 +3156,71 @@
/* cifs_small_buf_release(pSMB); */ /* Freed earlier now in SendReceive2 */
return rc;
}
+
+int
+CIFSSMBSetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
+ struct cifs_ntsd *pntsd, __u32 acllen)
+{
+ __u16 byte_count, param_count, data_count, param_offset, data_offset;
+ int rc = 0;
+ int bytes_returned = 0;
+ SET_SEC_DESC_REQ *pSMB = NULL;
+ NTRANSACT_RSP *pSMBr = NULL;
+
+setCifsAclRetry:
+ rc = smb_init(SMB_COM_NT_TRANSACT, 19, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return (rc);
+
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+
+ param_count = 8;
+ param_offset = offsetof(struct smb_com_transaction_ssec_req, Fid) - 4;
+ data_count = acllen;
+ data_offset = param_offset + param_count;
+ byte_count = 3 /* pad */ + param_count;
+
+ pSMB->DataCount = cpu_to_le32(data_count);
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->MaxParameterCount = cpu_to_le32(4);
+ pSMB->MaxDataCount = cpu_to_le32(16384);
+ pSMB->ParameterCount = cpu_to_le32(param_count);
+ pSMB->ParameterOffset = cpu_to_le32(param_offset);
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->DataOffset = cpu_to_le32(data_offset);
+ pSMB->SetupCount = 0;
+ pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_SET_SECURITY_DESC);
+ pSMB->ByteCount = cpu_to_le16(byte_count+data_count);
+
+ pSMB->Fid = fid; /* file handle always le */
+ pSMB->Reserved2 = 0;
+ pSMB->AclFlags = cpu_to_le32(CIFS_ACL_DACL);
+
+ if (pntsd && acllen) {
+ memcpy((char *) &pSMBr->hdr.Protocol + data_offset,
+ (char *) pntsd,
+ acllen);
+ pSMB->hdr.smb_buf_length += (byte_count + data_count);
+
+ } else
+ pSMB->hdr.smb_buf_length += byte_count;
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+
+ cFYI(1, ("SetCIFSACL bytes_returned: %d, rc: %d", bytes_returned, rc));
+ if (rc)
+ cFYI(1, ("Set CIFS ACL returned %d", rc));
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto setCifsAclRetry;
+
+ return (rc);
+}
+
#endif /* CONFIG_CIFS_EXPERIMENTAL */
/* Legacy Query Path Information call for lookup to old servers such