[PATCH] cifs: add support for chattr/lsattr in new CIFS POSIX extensions
Signed-off-by: Steve French (sfrench@us.ibm.com)
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index df6a619..36d3c12 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -2072,7 +2072,91 @@
return rc;
}
-#endif
+/* BB fix tabs in this function FIXME BB */
+int
+CIFSGetExtAttr(const int xid, struct cifsTconInfo *tcon,
+ const int netfid, __u64 * pExtAttrBits, __u64 *pMask)
+{
+ int rc = 0;
+ struct smb_t2_qfi_req *pSMB = NULL;
+ struct smb_t2_qfi_rsp *pSMBr = NULL;
+ int bytes_returned;
+ __u16 params, byte_count;
+
+ cFYI(1,("In GetExtAttr"));
+ if(tcon == NULL)
+ return -ENODEV;
+
+GetExtAttrRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ params = 2 /* level */ +2 /* fid */ + 2 /* rsrvd */;
+ pSMB->t2.TotalDataCount = 0;
+ pSMB->t2.MaxParameterCount = cpu_to_le16(2);
+ /* BB find exact max data count below from sess structure BB */
+ pSMB->t2.MaxDataCount = cpu_to_le16(4000);
+ 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_com_transaction2_qpi_req ,InformationLevel) - 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 + 3 /* pad */ ;
+ pSMB->t2.TotalParameterCount = cpu_to_le16(params);
+ pSMB->t2.ParameterCount = pSMB->t2.TotalParameterCount;
+ pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_ATTR_FLAGS);
+ pSMB->Pad1 = 0;
+ pSMB->Pad2 = 0;
+ pSMB->Fid = netfid;
+ pSMB->hdr.smb_buf_length += byte_count;
+ pSMB->t2.ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cFYI(1, ("error %d in GetExtAttr", rc));
+ } else {
+ /* decode response */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+ if (rc || (pSMBr->ByteCount < 2))
+ /* BB also check enough total bytes returned */
+ /* If rc should we check for EOPNOSUPP and
+ disable the srvino flag? or in caller? */
+ rc = -EIO; /* bad smb */
+ else {
+ __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+ __u16 count = le16_to_cpu(pSMBr->t2.DataCount);
+ struct file_chattr_info * pfinfo;
+ /* BB Do we need a cast or hash here ? */
+ if(count != 16) {
+ cFYI(1, ("Illegal size ret in GetExtAttr"));
+ rc = -EIO;
+ goto GetExtAttrOut;
+ }
+ pfinfo = (struct file_chattr_info *)
+ (data_offset + (char *) &pSMBr->hdr.Protocol);
+ *pExtAttrBits = le64_to_cpu(pfinfo->mode);
+ *pMask = le64_to_cpu(pfinfo->mask);
+ }
+ }
+GetExtAttrOut:
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto GetExtAttrRetry;
+ return rc;
+}
+
+
+#endif /* CONFIG_POSIX */
int
CIFSSMBQPathInfo(const int xid, struct cifsTconInfo *tcon,