From cbcf82aa58058fe05dbd9a8d8879ca0364e5df95 Mon Sep 17 00:00:00 2001 From: Rajesh Amaravathi Date: Thu, 12 Apr 2012 14:49:44 +0530 Subject: 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 Reviewed-on: http://review.gluster.com/3212 Tested-by: Gluster Build System Reviewed-by: Krishna Srinivas --- rpc/xdr/src/nlm4-xdr.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'rpc/xdr/src/nlm4-xdr.h') diff --git a/rpc/xdr/src/nlm4-xdr.h b/rpc/xdr/src/nlm4-xdr.h index d95a6ad6e..3799f6b1d 100644 --- a/rpc/xdr/src/nlm4-xdr.h +++ b/rpc/xdr/src/nlm4-xdr.h @@ -183,6 +183,13 @@ struct nlm4_shareres { }; typedef struct nlm4_shareres nlm4_shareres; +struct nlm4_freeallargs { + char *name; + u_int32_t state; +}; +typedef struct nlm4_freeallargs nlm4_freeallargs; + + #define NLM4_NULL 0 #define NLM4_TEST 1 #define NLM4_LOCK 2 @@ -229,6 +236,7 @@ extern bool_t xdr_nlm4_cancargs (XDR *, nlm4_cancargs*); extern bool_t xdr_nlm4_unlockargs (XDR *, nlm4_unlockargs*); extern bool_t xdr_nlm4_shareargs (XDR *, nlm4_shareargs*); extern bool_t xdr_nlm4_shareres (XDR *, nlm4_shareres*); +extern bool_t xdr_nlm4_freeallargs (XDR *, nlm4_freeallargs*); #else /* K&R C */ extern bool_t xdr_netobj (); @@ -248,6 +256,7 @@ extern bool_t xdr_nlm4_cancargs (); extern bool_t xdr_nlm4_unlockargs (); extern bool_t xdr_nlm4_shareargs (); extern bool_t xdr_nlm4_shareres (); +extern bool_t xdr_nlm4_freeallargs (); #endif /* K&R C */ -- cgit