path: root/xlators/nfs/server/src/nlm4.h
diff options
authorRajesh Amaravathi <>2012-04-12 14:49:44 +0530
committerVijay Bellur <>2012-05-17 02:12:49 -0700
commitcbcf82aa58058fe05dbd9a8d8879ca0364e5df95 (patch)
tree83c7dc8da592fb0442d5626eac6779c813d61655 /xlators/nfs/server/src/nlm4.h
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 <> Reviewed-on: Tested-by: Gluster Build System <> Reviewed-by: Krishna Srinivas <>
Diffstat (limited to 'xlators/nfs/server/src/nlm4.h')
1 files changed, 10 insertions, 0 deletions
diff --git a/xlators/nfs/server/src/nlm4.h b/xlators/nfs/server/src/nlm4.h
index db5874387..bcc7ae573 100644
--- a/xlators/nfs/server/src/nlm4.h
+++ b/xlators/nfs/server/src/nlm4.h
@@ -60,11 +60,21 @@ typedef struct nlm_client {
pid_t uniq;
struct list_head nlm_clients;
struct list_head fdes;
+ struct list_head shares;
struct rpc_clnt *rpc_clnt;
char *caller_name;
int nsm_monitor;
} nlm_client_t;
+typedef struct nlm_share {
+ struct list_head client_list;
+ struct list_head inode_list;
+ gf_lkowner_t lkowner;
+ inode_t *inode;
+ fsh_mode mode;
+ fsh_access access;
+} nlm_share_t;
typedef struct nlm_fde {
struct list_head fde_list;
fd_t *fd;