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target/iscsi: Convert timers to use timer_setup()

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In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly. Includes a fix for correcting an
on-stack timer usage.

Cc: "Nicholas A. Bellinger" <nab@linux-iscsi.org>
Cc: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Jiang Yi <jiangyilism@gmail.com>
Cc: Varun Prakash <varun@chelsio.com>
Cc: linux-scsi@vger.kernel.org
Cc: target-devel@vger.kernel.org
Reviewed-and-Tested-by: Bart Van Assche <Bart.VanAssche@wdc.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Kees Cook 2017-10-22 14:58:45 -07:00
parent 8a47aa9dc6
commit f7c9564a7c
10 changed files with 37 additions and 33 deletions
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3
drivers/target/iscsi/iscsi_target.c
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@ -372,8 +372,7 @@ struct iscsi_np *iscsit_add_np(
init_completion(&np->np_restart_comp);
INIT_LIST_HEAD(&np->np_list);
setup_timer(&np->np_login_timer, iscsi_handle_login_thread_timeout,
(unsigned long)np);
timer_setup(&np->np_login_timer, iscsi_handle_login_thread_timeout, 0);
ret = iscsi_target_setup_login_socket(np, sockaddr);
if (ret != 0) {

4
drivers/target/iscsi/iscsi_target_erl0.c
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@ -749,9 +749,9 @@ int iscsit_check_post_dataout(
}
}
void iscsit_handle_time2retain_timeout(unsigned long data)
void iscsit_handle_time2retain_timeout(struct timer_list *t)
{
struct iscsi_session *sess = (struct iscsi_session *) data;
struct iscsi_session *sess = from_timer(sess, t, time2retain_timer);
struct iscsi_portal_group *tpg = sess->tpg;
struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;

2
drivers/target/iscsi/iscsi_target_erl0.h
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@ -11,7 +11,7 @@ extern void iscsit_set_dataout_sequence_values(struct iscsi_cmd *);
extern int iscsit_check_pre_dataout(struct iscsi_cmd *, unsigned char *);
extern int iscsit_check_post_dataout(struct iscsi_cmd *, unsigned char *, u8);
extern void iscsit_start_time2retain_handler(struct iscsi_session *);
extern void iscsit_handle_time2retain_timeout(unsigned long data);
extern void iscsit_handle_time2retain_timeout(struct timer_list *t);
extern int iscsit_stop_time2retain_timer(struct iscsi_session *);
extern void iscsit_connection_reinstatement_rcfr(struct iscsi_conn *);
extern void iscsit_cause_connection_reinstatement(struct iscsi_conn *, int);

4
drivers/target/iscsi/iscsi_target_erl1.c
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@ -1148,11 +1148,11 @@ static int iscsit_set_dataout_timeout_values(
/*
* NOTE: Called from interrupt (timer) context.
*/
void iscsit_handle_dataout_timeout(unsigned long data)
void iscsit_handle_dataout_timeout(struct timer_list *t)
{
u32 pdu_length = 0, pdu_offset = 0;
u32 r2t_length = 0, r2t_offset = 0;
struct iscsi_cmd *cmd = (struct iscsi_cmd *) data;
struct iscsi_cmd *cmd = from_timer(cmd, t, dataout_timer);
struct iscsi_conn *conn = cmd->conn;
struct iscsi_session *sess = NULL;
struct iscsi_node_attrib *na;

2
drivers/target/iscsi/iscsi_target_erl1.h
View File

@ -29,7 +29,7 @@ extern int iscsit_execute_ooo_cmdsns(struct iscsi_session *);
extern int iscsit_execute_cmd(struct iscsi_cmd *, int);
extern int iscsit_handle_ooo_cmdsn(struct iscsi_session *, struct iscsi_cmd *, u32);
extern void iscsit_remove_ooo_cmdsn(struct iscsi_session *, struct iscsi_ooo_cmdsn *);
extern void iscsit_handle_dataout_timeout(unsigned long data);
extern void iscsit_handle_dataout_timeout(struct timer_list *t);
extern void iscsit_mod_dataout_timer(struct iscsi_cmd *);
extern void iscsit_start_dataout_timer(struct iscsi_cmd *, struct iscsi_conn *);
extern void iscsit_stop_dataout_timer(struct iscsi_cmd *);

15
drivers/target/iscsi/iscsi_target_login.c
View File

@ -333,8 +333,8 @@ static int iscsi_login_zero_tsih_s1(
spin_lock_init(&sess->session_usage_lock);
spin_lock_init(&sess->ttt_lock);
setup_timer(&sess->time2retain_timer, iscsit_handle_time2retain_timeout,
(unsigned long)sess);
timer_setup(&sess->time2retain_timer,
iscsit_handle_time2retain_timeout, 0);
idr_preload(GFP_KERNEL);
spin_lock_bh(&sess_idr_lock);
@ -842,9 +842,9 @@ void iscsi_post_login_handler(
iscsit_dec_conn_usage_count(conn);
}
void iscsi_handle_login_thread_timeout(unsigned long data)
void iscsi_handle_login_thread_timeout(struct timer_list *t)
{
struct iscsi_np *np = (struct iscsi_np *) data;
struct iscsi_np *np = from_timer(np, t, np_login_timer);
spin_lock_bh(&np->np_thread_lock);
pr_err("iSCSI Login timeout on Network Portal %pISpc\n",
@ -1265,10 +1265,9 @@ static int __iscsi_target_login_thread(struct iscsi_np *np)
pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
conn->conn_state = TARG_CONN_STATE_FREE;
setup_timer(&conn->nopin_response_timer,
iscsit_handle_nopin_response_timeout, (unsigned long)conn);
setup_timer(&conn->nopin_timer, iscsit_handle_nopin_timeout,
(unsigned long)conn);
timer_setup(&conn->nopin_response_timer,
iscsit_handle_nopin_response_timeout, 0);
timer_setup(&conn->nopin_timer, iscsit_handle_nopin_timeout, 0);
if (iscsit_conn_set_transport(conn, np->np_transport) < 0) {
kfree(conn);

2
drivers/target/iscsi/iscsi_target_login.h
View File

@ -24,6 +24,6 @@ extern void iscsi_post_login_handler(struct iscsi_np *, struct iscsi_conn *, u8)
extern void iscsi_target_login_sess_out(struct iscsi_conn *, struct iscsi_np *,
bool, bool);
extern int iscsi_target_login_thread(void *);
extern void iscsi_handle_login_thread_timeout(unsigned long data);
extern void iscsi_handle_login_thread_timeout(struct timer_list *t);
#endif /*** ISCSI_TARGET_LOGIN_H ***/

23
drivers/target/iscsi/iscsi_target_nego.c
View File

@ -559,9 +559,15 @@ static void iscsi_target_login_drop(struct iscsi_conn *conn, struct iscsi_login
iscsi_target_login_sess_out(conn, np, zero_tsih, true);
}
static void iscsi_target_login_timeout(unsigned long data)
struct conn_timeout {
struct timer_list timer;
struct iscsi_conn *conn;
};
static void iscsi_target_login_timeout(struct timer_list *t)
{
struct iscsi_conn *conn = (struct iscsi_conn *)data;
struct conn_timeout *timeout = from_timer(timeout, t, timer);
struct iscsi_conn *conn = timeout->conn;
pr_debug("Entering iscsi_target_login_timeout >>>>>>>>>>>>>>>>>>>\n");
@ -580,7 +586,7 @@ static void iscsi_target_do_login_rx(struct work_struct *work)
struct iscsi_np *np = login->np;
struct iscsi_portal_group *tpg = conn->tpg;
struct iscsi_tpg_np *tpg_np = conn->tpg_np;
struct timer_list login_timer;
struct conn_timeout timeout;
int rc, zero_tsih = login->zero_tsih;
bool state;
@ -618,13 +624,14 @@ static void iscsi_target_do_login_rx(struct work_struct *work)
conn->login_kworker = current;
allow_signal(SIGINT);
setup_timer_on_stack(&login_timer, iscsi_target_login_timeout,
(unsigned long)conn);
mod_timer(&login_timer, jiffies + TA_LOGIN_TIMEOUT * HZ);
pr_debug("Starting login_timer for %s/%d\n", current->comm, current->pid);
timeout.conn = conn;
timer_setup_on_stack(&timeout.timer, iscsi_target_login_timeout, 0);
mod_timer(&timeout.timer, jiffies + TA_LOGIN_TIMEOUT * HZ);
pr_debug("Starting login timer for %s/%d\n", current->comm, current->pid);
rc = conn->conn_transport->iscsit_get_login_rx(conn, login);
del_timer_sync(&login_timer);
del_timer_sync(&timeout.timer);
destroy_timer_on_stack(&timeout.timer);
flush_signals(current);
conn->login_kworker = NULL;

11
drivers/target/iscsi/iscsi_target_util.c
View File

@ -176,8 +176,7 @@ struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, int state)
spin_lock_init(&cmd->istate_lock);
spin_lock_init(&cmd->error_lock);
spin_lock_init(&cmd->r2t_lock);
setup_timer(&cmd->dataout_timer, iscsit_handle_dataout_timeout,
(unsigned long)cmd);
timer_setup(&cmd->dataout_timer, iscsit_handle_dataout_timeout, 0);
return cmd;
}
@ -882,9 +881,9 @@ static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response)
return 0;
}
void iscsit_handle_nopin_response_timeout(unsigned long data)
void iscsit_handle_nopin_response_timeout(struct timer_list *t)
{
struct iscsi_conn *conn = (struct iscsi_conn *) data;
struct iscsi_conn *conn = from_timer(conn, t, nopin_response_timer);
iscsit_inc_conn_usage_count(conn);
@ -978,9 +977,9 @@ void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn)
spin_unlock_bh(&conn->nopin_timer_lock);
}
void iscsit_handle_nopin_timeout(unsigned long data)
void iscsit_handle_nopin_timeout(struct timer_list *t)
{
struct iscsi_conn *conn = (struct iscsi_conn *) data;
struct iscsi_conn *conn = from_timer(conn, t, nopin_timer);
iscsit_inc_conn_usage_count(conn);

4
drivers/target/iscsi/iscsi_target_util.h
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@ -47,11 +47,11 @@ extern struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *,
extern void iscsit_check_conn_usage_count(struct iscsi_conn *);
extern void iscsit_dec_conn_usage_count(struct iscsi_conn *);
extern void iscsit_inc_conn_usage_count(struct iscsi_conn *);
extern void iscsit_handle_nopin_response_timeout(unsigned long data);
extern void iscsit_handle_nopin_response_timeout(struct timer_list *t);
extern void iscsit_mod_nopin_response_timer(struct iscsi_conn *);
extern void iscsit_start_nopin_response_timer(struct iscsi_conn *);
extern void iscsit_stop_nopin_response_timer(struct iscsi_conn *);
extern void iscsit_handle_nopin_timeout(unsigned long data);
extern void iscsit_handle_nopin_timeout(struct timer_list *t);
extern void __iscsit_start_nopin_timer(struct iscsi_conn *);
extern void iscsit_start_nopin_timer(struct iscsi_conn *);
extern void iscsit_stop_nopin_timer(struct iscsi_conn *);