From f7ba7fe685bc3ed8fd0687870e68b2567d17357f Mon Sep 17 00:00:00 2001 From: Pavel Shilovsky Date: Wed, 19 Sep 2012 06:22:43 -0700 Subject: CIFS: Add brlock support for SMB2 Signed-off-by: Pavel Shilovsky --- fs/cifs/smb2pdu.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) (limited to 'fs/cifs/smb2pdu.c') diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 1b447612200e..d3e1cfca3379 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -2047,3 +2047,62 @@ qinf_exit: free_rsp_buf(resp_buftype, iov.iov_base); return rc; } + +int +smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, + const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, + const __u32 num_lock, struct smb2_lock_element *buf) +{ + int rc = 0; + struct smb2_lock_req *req = NULL; + struct kvec iov[2]; + int resp_buf_type; + unsigned int count; + + cFYI(1, "smb2_lockv num lock %d", num_lock); + + rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req); + if (rc) + return rc; + + req->hdr.ProcessId = cpu_to_le32(pid); + req->LockCount = cpu_to_le16(num_lock); + + req->PersistentFileId = persist_fid; + req->VolatileFileId = volatile_fid; + + count = num_lock * sizeof(struct smb2_lock_element); + inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element)); + + iov[0].iov_base = (char *)req; + /* 4 for rfc1002 length field and count for all locks */ + iov[0].iov_len = get_rfc1002_length(req) + 4 - count; + iov[1].iov_base = (char *)buf; + iov[1].iov_len = count; + + cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); + rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP); + if (rc) { + cFYI(1, "Send error in smb2_lockv = %d", rc); + cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); + } + + return rc; +} + +int +SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, + const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, + const __u64 length, const __u64 offset, const __u32 lock_flags, + const bool wait) +{ + struct smb2_lock_element lock; + + lock.Offset = cpu_to_le64(offset); + lock.Length = cpu_to_le64(length); + lock.Flags = cpu_to_le32(lock_flags); + if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) + lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); + + return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); +} -- cgit v1.2.3