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target/iscsi: Allocate session IDs from an IDA

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Since the session is never looked up by ID, we can use the more
space-efficient IDA instead of the IDR.

Signed-off-by: Matthew Wilcox <willy@infradead.org>
This commit is contained in:
Matthew Wilcox
2018-06-19 01:23:04 -04:00
parent 26abc916a8
commit 31ff0ceeb2
3 changed files with 10 additions and 30 deletions
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10
drivers/target/iscsi/iscsi_target.c
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@@ -57,9 +57,8 @@ static DEFINE_SPINLOCK(tiqn_lock);
static DEFINE_MUTEX(np_lock);
static struct idr tiqn_idr;
struct idr sess_idr;
DEFINE_IDA(sess_ida);
struct mutex auth_id_lock;
spinlock_t sess_idr_lock;
struct iscsit_global *iscsit_global;
@@ -700,9 +699,7 @@ static int __init iscsi_target_init_module(void)
spin_lock_init(&iscsit_global->ts_bitmap_lock);
mutex_init(&auth_id_lock);
spin_lock_init(&sess_idr_lock);
idr_init(&tiqn_idr);
idr_init(&sess_idr);
ret = target_register_template(&iscsi_ops);
if (ret)
@@ -4375,10 +4372,7 @@ int iscsit_close_session(struct iscsi_session *sess)
pr_debug("Decremented number of active iSCSI Sessions on"
" iSCSI TPG: %hu to %u\n", tpg->tpgt, tpg->nsessions);
spin_lock(&sess_idr_lock);
idr_remove(&sess_idr, sess->session_index);
spin_unlock(&sess_idr_lock);
ida_free(&sess_ida, sess->session_index);
kfree(sess->sess_ops);
sess->sess_ops = NULL;
spin_unlock_bh(&se_tpg->session_lock);