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[PATCH] knfsd: lockd: introduce nsm_handle

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This patch introduces the nsm_handle, which is shared by all nlm_host objects
referring to the same client.

With this patch applied, all nlm_hosts from the same address will share the
same nsm_handle.  A future patch will add sharing by name.

Note: this patch changes h_name so that it is no longer guaranteed to be an IP
address of the host.  When the host represents an NFS server, h_name will be
the name passed in the mount call.  When the host represents a client, h_name
will be the name presented in the lock request received from the client.  A
h_name is only used for printing informational messages, this change should
not be significant.

Signed-off-by: Olaf Kirch <okir@suse.de>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Olaf Kirch
2006-10-04 02:15:53 -07:00
committed by Linus Torvalds
parent db4e4c9a9e
commit 8dead0dbd4
4 changed files with 136 additions and 19 deletions
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17
include/linux/lockd/lockd.h
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@@ -40,14 +40,13 @@ struct nlm_host {
struct nlm_host * h_next; /* linked list (hash table) */
struct sockaddr_in h_addr; /* peer address */
struct rpc_clnt * h_rpcclnt; /* RPC client to talk to peer */
char h_name[20]; /* remote hostname */
char * h_name; /* remote hostname */
u32 h_version; /* interface version */
unsigned short h_proto; /* transport proto */
unsigned short h_reclaiming : 1,
h_server : 1, /* server side, not client side */
h_inuse : 1,
h_killed : 1,
h_monitored : 1;
h_killed : 1;
wait_queue_head_t h_gracewait; /* wait while reclaiming */
struct rw_semaphore h_rwsem; /* Reboot recovery lock */
u32 h_state; /* pseudo-state counter */
@@ -61,6 +60,16 @@ struct nlm_host {
spinlock_t h_lock;
struct list_head h_granted; /* Locks in GRANTED state */
struct list_head h_reclaim; /* Locks in RECLAIM state */
struct nsm_handle * h_nsmhandle; /* NSM status handle */
};
struct nsm_handle {
struct list_head sm_link;
atomic_t sm_count;
char * sm_name;
struct sockaddr_in sm_addr;
unsigned int sm_monitored : 1,
sm_sticky : 1; /* don't unmonitor */
};
/*
@@ -171,6 +180,8 @@ void nlm_release_host(struct nlm_host *);
void nlm_shutdown_hosts(void);
extern struct nlm_host *nlm_find_client(void);
extern void nlm_host_rebooted(const struct sockaddr_in *, const struct nlm_reboot *);
struct nsm_handle *nsm_find(const struct sockaddr_in *, const char *, int);
void nsm_release(struct nsm_handle *);
/*