diff options
| author | Rajesh Amaravathi <rajesh@redhat.com> | 2012-04-12 14:49:44 +0530 |
|---|---|---|
| committer | Vijay Bellur <vijay@gluster.com> | 2012-05-17 02:12:49 -0700 |
| commit | cbcf82aa58058fe05dbd9a8d8879ca0364e5df95 (patch) | |
| tree | 83c7dc8da592fb0442d5626eac6779c813d61655 /rpc/xdr/src/msg-nfs3.h | |
| parent | d8ede99e6f429d3a63b794c495f99fc8f76e9651 (diff) | |
nfs/nlm: procedures for PC clients
* This change introduces four NLMv4 procedures:
NM_LOCK, SHARE, UNSHARE and FREE_ALL.
These are used by PC clients (windows/dos) to control access
to files.
1. NM_LOCK: this lock is not monitored by statd.
2. SHARE: A share reservation is a lock on the whole file
that is taken whenever a file is opened on windows clients.
This has ACCESS (N, R, W, RW) and DENY MODE (N, R, W, RW).
ACCESS: mode of access requested by the client;
DENY MODE: what the requesting client wants to
deny other clients.
3. UNSHARE: remove a share reservation obtained by SHARE.
Called while closing a file.
4. FREE_ALL: remove all share reservations and locks,
both monitored and unmonitored, of the calling client.
* lock and nm_lock use a common function with only
a flag conveying whether or not to monitor a lock.
* NOTES:
1. SHARE reservations are not STACK_WIND'd to subsequent xlators.
These are maintained in-memory in the nfs xlator.
2. Consequently, for SHARE reservations to work effectively,
all PC clients *must* mount from the same gNfs server.
Not doing so will result in different servers maintaining
separate SHARE reservations which will not be enforced
for obvious reasons.
Change-Id: Id4f22670a94ed58691a6a7f4c80aa8c11421a277
BUG: 800287
Signed-off-by: Rajesh Amaravathi <rajesh@redhat.com>
Reviewed-on: http://review.gluster.com/3212
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Krishna Srinivas <krishna@gluster.com>
Diffstat (limited to 'rpc/xdr/src/msg-nfs3.h')
| -rw-r--r-- | rpc/xdr/src/msg-nfs3.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/rpc/xdr/src/msg-nfs3.h b/rpc/xdr/src/msg-nfs3.h index 1310e02f8..701df300a 100644 --- a/rpc/xdr/src/msg-nfs3.h +++ b/rpc/xdr/src/msg-nfs3.h @@ -203,9 +203,18 @@ extern ssize_t xdr_to_nlm4_unlockargs (struct iovec inmsg, nlm4_unlockargs *args); extern ssize_t +xdr_to_nlm4_shareargs (struct iovec inmsg, nlm4_shareargs *args); + +extern ssize_t +xdr_serialize_nlm4_shareres (struct iovec outmsg, nlm4_shareres *res); + +extern ssize_t xdr_serialize_nlm4_testargs (struct iovec outmsg, nlm4_testargs *args); extern ssize_t xdr_to_nlm4_res (struct iovec inmsg, nlm4_res *args); +extern ssize_t +xdr_to_nlm4_freeallargs (struct iovec inmsg, nlm4_freeallargs *args); + #endif |