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CIFS: Reconnect durable handles for SMB2

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On reconnects, we need to reopen file and then obtain all byte-range
locks held by the client. SMB2 protocol provides feature to make
this process atomic by reconnecting to the same file handle
with all it's byte-range locks. This patch adds this capability
for SMB2 shares.

Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steven French <steven@steven-GA-970A-DS3.(none)>
This commit is contained in:
Pavel Shilovsky
2013-07-09 18:40:58 +04:00
committed by Steve French
parent 064f6047a1
commit 9cbc0b7339
8 changed files with 58 additions and 12 deletions
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3
fs/cifs/smb2ops.c
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@@ -227,6 +227,7 @@ smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL);
if (rc) {
@@ -460,6 +461,7 @@ smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL);
kfree(utf16_path);
@@ -546,6 +548,7 @@ smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL);
if (rc)