Merge remote-tracking branch 'net-next/master'

[karo-tx-linux.git] / fs / cifs / cifssmb.c

diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index ccd31ab815d4b2404d58a0e42f3ad606d35b87f5..93b29474714a0cdba1356c85c049e874dbc195dd 100644 (file)
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -3199,6 +3199,60 @@ qreparse_out:
        return rc;
 }
 
+int
+CIFSSMB_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
+                   __u16 fid)
+{
+       int rc = 0;
+       int bytes_returned;
+       struct smb_com_transaction_compr_ioctl_req *pSMB;
+       struct smb_com_transaction_ioctl_rsp *pSMBr;
+
+       cifs_dbg(FYI, "Set compression for %u\n", fid);
+       rc = smb_init(SMB_COM_NT_TRANSACT, 23, tcon, (void **) &pSMB,
+                     (void **) &pSMBr);
+       if (rc)
+               return rc;
+
+       pSMB->compression_state = cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
+
+       pSMB->TotalParameterCount = 0;
+       pSMB->TotalDataCount = __constant_cpu_to_le32(2);
+       pSMB->MaxParameterCount = 0;
+       pSMB->MaxDataCount = 0;
+       pSMB->MaxSetupCount = 4;
+       pSMB->Reserved = 0;
+       pSMB->ParameterOffset = 0;
+       pSMB->DataCount = __constant_cpu_to_le32(2);
+       pSMB->DataOffset =
+               cpu_to_le32(offsetof(struct smb_com_transaction_compr_ioctl_req,
+                               compression_state) - 4);  /* 84 */
+       pSMB->SetupCount = 4;
+       pSMB->SubCommand = __constant_cpu_to_le16(NT_TRANSACT_IOCTL);
+       pSMB->ParameterCount = 0;
+       pSMB->FunctionCode = __constant_cpu_to_le32(FSCTL_SET_COMPRESSION);
+       pSMB->IsFsctl = 1; /* FSCTL */
+       pSMB->IsRootFlag = 0;
+       pSMB->Fid = fid; /* file handle always le */
+       /* 3 byte pad, followed by 2 byte compress state */
+       pSMB->ByteCount = __constant_cpu_to_le16(5);
+       inc_rfc1001_len(pSMB, 5);
+
+       rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+                        (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+       if (rc)
+               cifs_dbg(FYI, "Send error in SetCompression = %d\n", rc);
+
+       cifs_buf_release(pSMB);
+
+       /*
+        * Note: On -EAGAIN error only caller can retry on handle based calls
+        * since file handle passed in no longer valid.
+        */
+       return rc;
+}
+
+
 #ifdef CONFIG_CIFS_POSIX
 
 /*Convert an Access Control Entry from wire format to local POSIX xattr format*/