For some ops on rpc handle:
1. ksmbd_session_rpc_method(), possibly on high frequency.
2. ksmbd_session_rpc_close().
id is used as indexing key to lookup channel, in that case,
linear search based on list may suffer a bit for performance.
Implements sess->rpc_handle_list as xarray.
Signed-off-by: Dawei Li <[email protected]>
---
fs/ksmbd/mgmt/user_session.c | 37 ++++++++++++++----------------------
fs/ksmbd/mgmt/user_session.h | 2 +-
2 files changed, 15 insertions(+), 24 deletions(-)
diff --git a/fs/ksmbd/mgmt/user_session.c b/fs/ksmbd/mgmt/user_session.c
index a2b128dedcfc..1ca2aae4c299 100644
--- a/fs/ksmbd/mgmt/user_session.c
+++ b/fs/ksmbd/mgmt/user_session.c
@@ -25,7 +25,6 @@ static DECLARE_RWSEM(sessions_table_lock);
struct ksmbd_session_rpc {
int id;
unsigned int method;
- struct list_head list;
};
static void free_channel_list(struct ksmbd_session *sess)
@@ -58,15 +57,14 @@ static void __session_rpc_close(struct ksmbd_session *sess,
static void ksmbd_session_rpc_clear_list(struct ksmbd_session *sess)
{
struct ksmbd_session_rpc *entry;
+ long index;
- while (!list_empty(&sess->rpc_handle_list)) {
- entry = list_entry(sess->rpc_handle_list.next,
- struct ksmbd_session_rpc,
- list);
-
- list_del(&entry->list);
+ xa_for_each(&sess->rpc_handle_list, index, entry) {
+ xa_erase(&sess->rpc_handle_list, index);
__session_rpc_close(sess, entry);
}
+
+ xa_destroy(&sess->rpc_handle_list);
}
static int __rpc_method(char *rpc_name)
@@ -102,13 +100,13 @@ int ksmbd_session_rpc_open(struct ksmbd_session *sess, char *rpc_name)
entry = kzalloc(sizeof(struct ksmbd_session_rpc), GFP_KERNEL);
if (!entry)
- return -EINVAL;
+ return -ENOMEM;
- list_add(&entry->list, &sess->rpc_handle_list);
entry->method = method;
entry->id = ksmbd_ipc_id_alloc();
if (entry->id < 0)
goto free_entry;
+ xa_store(&sess->rpc_handle_list, entry->id, entry, GFP_KERNEL);
resp = ksmbd_rpc_open(sess, entry->id);
if (!resp)
@@ -117,9 +115,9 @@ int ksmbd_session_rpc_open(struct ksmbd_session *sess, char *rpc_name)
kvfree(resp);
return entry->id;
free_id:
+ xa_erase(&sess->rpc_handle_list, entry->id);
ksmbd_rpc_id_free(entry->id);
free_entry:
- list_del(&entry->list);
kfree(entry);
return -EINVAL;
}
@@ -128,24 +126,17 @@ void ksmbd_session_rpc_close(struct ksmbd_session *sess, int id)
{
struct ksmbd_session_rpc *entry;
- list_for_each_entry(entry, &sess->rpc_handle_list, list) {
- if (entry->id == id) {
- list_del(&entry->list);
- __session_rpc_close(sess, entry);
- break;
- }
- }
+ entry = xa_erase(&sess->rpc_handle_list, id);
+ if (entry)
+ __session_rpc_close(sess, entry);
}
int ksmbd_session_rpc_method(struct ksmbd_session *sess, int id)
{
struct ksmbd_session_rpc *entry;
- list_for_each_entry(entry, &sess->rpc_handle_list, list) {
- if (entry->id == id)
- return entry->method;
- }
- return 0;
+ entry = xa_load(&sess->rpc_handle_list, id);
+ return entry ? entry->method : 0;
}
void ksmbd_session_destroy(struct ksmbd_session *sess)
@@ -327,7 +318,7 @@ static struct ksmbd_session *__session_create(int protocol)
set_session_flag(sess, protocol);
xa_init(&sess->tree_conns);
xa_init(&sess->ksmbd_chann_list);
- INIT_LIST_HEAD(&sess->rpc_handle_list);
+ xa_init(&sess->rpc_handle_list);
sess->sequence_number = 1;
ret = __init_smb2_session(sess);
diff --git a/fs/ksmbd/mgmt/user_session.h b/fs/ksmbd/mgmt/user_session.h
index 44a3c67b2bd9..b6a9e7a6aae4 100644
--- a/fs/ksmbd/mgmt/user_session.h
+++ b/fs/ksmbd/mgmt/user_session.h
@@ -52,7 +52,7 @@ struct ksmbd_session {
struct xarray ksmbd_chann_list;
struct xarray tree_conns;
struct ida tree_conn_ida;
- struct list_head rpc_handle_list;
+ struct xarray rpc_handle_list;
__u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE];
__u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE];
--
2.25.1