static void null_init_internal(void)
{
static CFS_HLIST_HEAD(__list);
null_sec.ps_policy = &null_policy;
cfs_atomic_set(&null_sec.ps_refcount, 1); /* always busy */
null_sec.ps_id = -1;
null_sec.ps_import = NULL;
null_sec.ps_flvr.sf_rpc = SPTLRPC_FLVR_NULL;
null_sec.ps_flvr.sf_flags = 0;
null_sec.ps_part = LUSTRE_SP_ANY;
null_sec.ps_dying = 0;
cfs_spin_lock_init(&null_sec.ps_lock);
cfs_atomic_set(&null_sec.ps_nctx, 1); /* for "null_cli_ctx" */
CFS_INIT_LIST_HEAD(&null_sec.ps_gc_list);
null_sec.ps_gc_interval = 0;
null_sec.ps_gc_next = 0;
cfs_hlist_add_head(&null_cli_ctx.cc_cache, &__list);
cfs_atomic_set(&null_cli_ctx.cc_refcount, 1); /* for hash */
null_cli_ctx.cc_sec = &null_sec;
null_cli_ctx.cc_ops = &null_ctx_ops;
null_cli_ctx.cc_expire = 0;
null_cli_ctx.cc_flags = PTLRPC_CTX_CACHED | PTLRPC_CTX_ETERNAL |
PTLRPC_CTX_UPTODATE;
null_cli_ctx.cc_vcred.vc_uid = 0;
cfs_spin_lock_init(&null_cli_ctx.cc_lock);
CFS_INIT_LIST_HEAD(&null_cli_ctx.cc_req_list);
CFS_INIT_LIST_HEAD(&null_cli_ctx.cc_gc_chain);
}
static
void ctx_enhash_pf(struct ptlrpc_cli_ctx *ctx, cfs_hlist_head_t *hash)
{
set_bit(PTLRPC_CTX_CACHED_BIT, &ctx->cc_flags);
atomic_inc(&ctx->cc_refcount);
cfs_hlist_add_head(&ctx->cc_cache, hash);
}
/*
* caller must hold spinlock
*/
static
void ctx_unhash_pf(struct ptlrpc_cli_ctx *ctx, cfs_hlist_head_t *freelist)
{
assert_spin_locked(&ctx->cc_sec->ps_lock);
LASSERT(atomic_read(&ctx->cc_refcount) > 0);
LASSERT(test_bit(PTLRPC_CTX_CACHED_BIT, &ctx->cc_flags));
LASSERT(!cfs_hlist_unhashed(&ctx->cc_cache));
clear_bit(PTLRPC_CTX_CACHED_BIT, &ctx->cc_flags);
if (atomic_dec_and_test(&ctx->cc_refcount)) {
__cfs_hlist_del(&ctx->cc_cache);
cfs_hlist_add_head(&ctx->cc_cache, freelist);
} else {
cfs_hlist_del_init(&ctx->cc_cache);
}
}
