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authorRajesh Amaravathi <rajesh@redhat.com>2012-04-12 14:49:44 +0530
committerVijay Bellur <vijay@gluster.com>2012-05-17 02:12:49 -0700
commitcbcf82aa58058fe05dbd9a8d8879ca0364e5df95 (patch)
tree83c7dc8da592fb0442d5626eac6779c813d61655 /rpc/xdr/src/nlm4.x
parentd8ede99e6f429d3a63b794c495f99fc8f76e9651 (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/nlm4.x')
-rw-r--r--rpc/xdr/src/nlm4.x9
1 files changed, 7 insertions, 2 deletions
diff --git a/rpc/xdr/src/nlm4.x b/rpc/xdr/src/nlm4.x
index d738b27770d..a6de6f32bf4 100644
--- a/rpc/xdr/src/nlm4.x
+++ b/rpc/xdr/src/nlm4.x
@@ -74,7 +74,7 @@ struct nlm4_holder {
};
struct nlm4_lock {
- string caller_name<MAXNAMELEN>;
+ string caller_name<LM_MAXSTRLEN>;
netobj fh;
netobj oh;
u_int32_t svid;
@@ -83,7 +83,7 @@ struct nlm4_lock {
};
struct nlm4_share {
- string caller_name<MAXNAMELEN>;
+ string caller_name<LM_MAXSTRLEN>;
netobj fh;
netobj oh;
fsh_mode mode;
@@ -146,6 +146,11 @@ struct nlm4_shareres {
int sequence;
};
+struct nlm4_freeallargs {
+ string name<LM_MAXSTRLEN>; /* client hostname */
+ uint32 state; /* unused */
+};
+
/*
* argument for the procedure called by rpc.statd when a monitored host
* status change.