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authorLinus Torvalds <torvalds@linux-foundation.org>2018-08-26 11:48:42 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-26 11:48:42 -0700
commitaba16dc5cf9318b4e0fe92f8261779cd9f1d2d77 (patch)
tree1f53d2cee40e82efe6a727208307af475327af9a /drivers/target
parentc4726e774ed27680c418e138234dfd2b8e1e89ac (diff)
parent1df895190233fcc30d46beca4550bcafb7b959a6 (diff)
downloadlinux-aba16dc5cf9318b4e0fe92f8261779cd9f1d2d77.tar.bz2
Merge branch 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax
Pull IDA updates from Matthew Wilcox: "A better IDA API: id = ida_alloc(ida, GFP_xxx); ida_free(ida, id); rather than the cumbersome ida_simple_get(), ida_simple_remove(). The new IDA API is similar to ida_simple_get() but better named. The internal restructuring of the IDA code removes the bitmap preallocation nonsense. I hope the net -200 lines of code is convincing" * 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax: (29 commits) ida: Change ida_get_new_above to return the id ida: Remove old API test_ida: check_ida_destroy and check_ida_alloc test_ida: Convert check_ida_conv to new API test_ida: Move ida_check_max test_ida: Move ida_check_leaf idr-test: Convert ida_check_nomem to new API ida: Start new test_ida module target/iscsi: Allocate session IDs from an IDA iscsi target: fix session creation failure handling drm/vmwgfx: Convert to new IDA API dmaengine: Convert to new IDA API ppc: Convert vas ID allocation to new IDA API media: Convert entity ID allocation to new IDA API ppc: Convert mmu context allocation to new IDA API Convert net_namespace to new IDA API cb710: Convert to new IDA API rsxx: Convert to new IDA API osd: Convert to new IDA API sd: Convert to new IDA API ...
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/iscsi/iscsi_target.c10
-rw-r--r--drivers/target/iscsi/iscsi_target.h4
-rw-r--r--drivers/target/iscsi/iscsi_target_login.c41
3 files changed, 21 insertions, 34 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 8e223799347a..94bad43c41ff 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -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);
diff --git a/drivers/target/iscsi/iscsi_target.h b/drivers/target/iscsi/iscsi_target.h
index 42de1843aa40..48bac0acf8c7 100644
--- a/drivers/target/iscsi/iscsi_target.h
+++ b/drivers/target/iscsi/iscsi_target.h
@@ -55,9 +55,7 @@ extern struct kmem_cache *lio_ooo_cache;
extern struct kmem_cache *lio_qr_cache;
extern struct kmem_cache *lio_r2t_cache;
-extern struct idr sess_idr;
+extern struct ida sess_ida;
extern struct mutex auth_id_lock;
-extern spinlock_t sess_idr_lock;
-
#endif /*** ISCSI_TARGET_H ***/
diff --git a/drivers/target/iscsi/iscsi_target_login.c b/drivers/target/iscsi/iscsi_target_login.c
index 923b1a9fc3dc..9e74f8bc2963 100644
--- a/drivers/target/iscsi/iscsi_target_login.c
+++ b/drivers/target/iscsi/iscsi_target_login.c
@@ -336,22 +336,15 @@ static int iscsi_login_zero_tsih_s1(
timer_setup(&sess->time2retain_timer,
iscsit_handle_time2retain_timeout, 0);
- idr_preload(GFP_KERNEL);
- spin_lock_bh(&sess_idr_lock);
- ret = idr_alloc(&sess_idr, NULL, 0, 0, GFP_NOWAIT);
- if (ret >= 0)
- sess->session_index = ret;
- spin_unlock_bh(&sess_idr_lock);
- idr_preload_end();
-
+ ret = ida_alloc(&sess_ida, GFP_KERNEL);
if (ret < 0) {
- pr_err("idr_alloc() for sess_idr failed\n");
+ pr_err("Session ID allocation failed %d\n", ret);
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
ISCSI_LOGIN_STATUS_NO_RESOURCES);
- kfree(sess);
- return -ENOMEM;
+ goto free_sess;
}
+ sess->session_index = ret;
sess->creation_time = get_jiffies_64();
/*
* The FFP CmdSN window values will be allocated from the TPG's
@@ -365,20 +358,26 @@ static int iscsi_login_zero_tsih_s1(
ISCSI_LOGIN_STATUS_NO_RESOURCES);
pr_err("Unable to allocate memory for"
" struct iscsi_sess_ops.\n");
- kfree(sess);
- return -ENOMEM;
+ goto free_id;
}
sess->se_sess = transport_alloc_session(TARGET_PROT_NORMAL);
if (IS_ERR(sess->se_sess)) {
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
ISCSI_LOGIN_STATUS_NO_RESOURCES);
- kfree(sess->sess_ops);
- kfree(sess);
- return -ENOMEM;
+ goto free_ops;
}
return 0;
+
+free_ops:
+ kfree(sess->sess_ops);
+free_id:
+ ida_free(&sess_ida, sess->session_index);
+free_sess:
+ kfree(sess);
+ conn->sess = NULL;
+ return -ENOMEM;
}
static int iscsi_login_zero_tsih_s2(
@@ -1161,13 +1160,9 @@ void iscsi_target_login_sess_out(struct iscsi_conn *conn,
ISCSI_LOGIN_STATUS_INIT_ERR);
if (!zero_tsih || !conn->sess)
goto old_sess_out;
- if (conn->sess->se_sess)
- transport_free_session(conn->sess->se_sess);
- if (conn->sess->session_index != 0) {
- spin_lock_bh(&sess_idr_lock);
- idr_remove(&sess_idr, conn->sess->session_index);
- spin_unlock_bh(&sess_idr_lock);
- }
+
+ transport_free_session(conn->sess->se_sess);
+ ida_free(&sess_ida, conn->sess->session_index);
kfree(conn->sess->sess_ops);
kfree(conn->sess);
conn->sess = NULL;