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nfsd4: initialize special stateid's at compile time 

Stateid's with "other" ("opaque") field all zeros or all ones are
reserved.  We define all_ones separately on the off chance there will be
more such some day, though currently all the other special stateid's
have zero other field.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields 2011-12-12 15:00:35 -05:00
parent f5c8593b94
commit f32f3c2d3f
1 changed files with 12 additions and 5 deletions
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17
fs/nfsd/nfs4state.c
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@ -49,12 +49,20 @@
time_t nfsd4_lease = 90; /* default lease time */
time_t nfsd4_grace = 90;
static time_t boot_time;
static stateid_t zerostateid; /* bits all 0 */
static stateid_t onestateid; /* bits all 1 */
#define all_ones {{~0,~0},~0}
static const stateid_t one_stateid = {
.si_generation = ~0,
.si_opaque = all_ones,
};
static const stateid_t zero_stateid = {
/* all fields zero */
};
static u64 current_sessionid = 1;
#define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
#define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
#define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
#define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
/* forward declarations */
static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner);
@ -4564,7 +4572,6 @@ nfs4_state_init(void)
}
for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++)
INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]);
memset(&onestateid, ~0, sizeof(stateid_t));
INIT_LIST_HEAD(&close_lru);
INIT_LIST_HEAD(&client_lru);
INIT_LIST_HEAD(&del_recall_lru);