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target/iscsi: Simplify timer manipulation code 

Move timer initialization from before add_timer() to the context
where the containing object is initialized. Use setup_timer() and
mod_timer() instead of open coding these. Use 'jiffies' instead
of get_jiffies_64() when calculating expiry times because expiry
times have type unsigned long, just like 'jiffies'.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Andy Grover <agrover@redhat.com>
Cc: David Disseldorp <ddiss@suse.de>
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Bart Van Assche 2017-05-23 16:48:50 -07:00 committed by Kees Cook
parent d744644ad7
commit 8a47aa9dc6
10 changed files with 34 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/target/iscsi/iscsi_target.c
View File

@ -372,6 +372,9 @@ 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);
ret = iscsi_target_setup_login_socket(np, sockaddr);
if (ret != 0) {
kfree(np);

10
drivers/target/iscsi/iscsi_target_erl0.c
View File

@ -749,7 +749,7 @@ int iscsit_check_post_dataout(
}
}
static void iscsit_handle_time2retain_timeout(unsigned long data)
void iscsit_handle_time2retain_timeout(unsigned long data)
{
struct iscsi_session *sess = (struct iscsi_session *) data;
struct iscsi_portal_group *tpg = sess->tpg;
@ -809,14 +809,10 @@ void iscsit_start_time2retain_handler(struct iscsi_session *sess)
pr_debug("Starting Time2Retain timer for %u seconds on"
" SID: %u\n", sess->sess_ops->DefaultTime2Retain, sess->sid);
init_timer(&sess->time2retain_timer);
sess->time2retain_timer.expires =
(get_jiffies_64() + sess->sess_ops->DefaultTime2Retain * HZ);
sess->time2retain_timer.data = (unsigned long)sess;
sess->time2retain_timer.function = iscsit_handle_time2retain_timeout;
sess->time2retain_timer_flags &= ~ISCSI_TF_STOP;
sess->time2retain_timer_flags |= ISCSI_TF_RUNNING;
add_timer(&sess->time2retain_timer);
mod_timer(&sess->time2retain_timer,
jiffies + sess->sess_ops->DefaultTime2Retain * HZ);
}
/*

1
drivers/target/iscsi/iscsi_target_erl0.h
View File

@ -11,6 +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 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);

8
drivers/target/iscsi/iscsi_target_erl1.c
View File

@ -1148,7 +1148,7 @@ static int iscsit_set_dataout_timeout_values(
/*
* NOTE: Called from interrupt (timer) context.
*/
static void iscsit_handle_dataout_timeout(unsigned long data)
void iscsit_handle_dataout_timeout(unsigned long data)
{
u32 pdu_length = 0, pdu_offset = 0;
u32 r2t_length = 0, r2t_offset = 0;
@ -1264,13 +1264,9 @@ void iscsit_start_dataout_timer(
pr_debug("Starting DataOUT timer for ITT: 0x%08x on"
" CID: %hu.\n", cmd->init_task_tag, conn->cid);
init_timer(&cmd->dataout_timer);
cmd->dataout_timer.expires = (get_jiffies_64() + na->dataout_timeout * HZ);
cmd->dataout_timer.data = (unsigned long)cmd;
cmd->dataout_timer.function = iscsit_handle_dataout_timeout;
cmd->dataout_timer_flags &= ~ISCSI_TF_STOP;
cmd->dataout_timer_flags |= ISCSI_TF_RUNNING;
add_timer(&cmd->dataout_timer);
mod_timer(&cmd->dataout_timer, jiffies + na->dataout_timeout * HZ);
}
void iscsit_stop_dataout_timer(struct iscsi_cmd *cmd)

1
drivers/target/iscsi/iscsi_target_erl1.h
View File

@ -29,6 +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_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 *);

16
drivers/target/iscsi/iscsi_target_login.c
View File

@ -333,6 +333,9 @@ 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);
idr_preload(GFP_KERNEL);
spin_lock_bh(&sess_idr_lock);
ret = idr_alloc(&sess_idr, NULL, 0, 0, GFP_NOWAIT);
@ -839,7 +842,7 @@ void iscsi_post_login_handler(
iscsit_dec_conn_usage_count(conn);
}
static void iscsi_handle_login_thread_timeout(unsigned long data)
void iscsi_handle_login_thread_timeout(unsigned long data)
{
struct iscsi_np *np = (struct iscsi_np *) data;
@ -866,13 +869,9 @@ static void iscsi_start_login_thread_timer(struct iscsi_np *np)
* point we do not have access to ISCSI_TPG_ATTRIB(tpg)->login_timeout
*/
spin_lock_bh(&np->np_thread_lock);
init_timer(&np->np_login_timer);
np->np_login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ);
np->np_login_timer.data = (unsigned long)np;
np->np_login_timer.function = iscsi_handle_login_thread_timeout;
np->np_login_timer_flags &= ~ISCSI_TF_STOP;
np->np_login_timer_flags |= ISCSI_TF_RUNNING;
add_timer(&np->np_login_timer);
mod_timer(&np->np_login_timer, jiffies + TA_LOGIN_TIMEOUT * HZ);
pr_debug("Added timeout timer to iSCSI login request for"
" %u seconds.\n", TA_LOGIN_TIMEOUT);
@ -1266,6 +1265,11 @@ 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);
if (iscsit_conn_set_transport(conn, np->np_transport) < 0) {
kfree(conn);
return 1;

1
drivers/target/iscsi/iscsi_target_login.h
View File

@ -24,5 +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);
#endif /*** ISCSI_TARGET_LOGIN_H ***/

8
drivers/target/iscsi/iscsi_target_nego.c
View File

@ -618,11 +618,9 @@ static void iscsi_target_do_login_rx(struct work_struct *work)
conn->login_kworker = current;
allow_signal(SIGINT);
init_timer(&login_timer);
login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ);
login_timer.data = (unsigned long)conn;
login_timer.function = iscsi_target_login_timeout;
add_timer(&login_timer);
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);
rc = conn->conn_transport->iscsit_get_login_rx(conn, login);

26
drivers/target/iscsi/iscsi_target_util.c
View File

@ -176,6 +176,8 @@ 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);
return cmd;
}
@ -880,7 +882,7 @@ static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response)
return 0;
}
static void iscsit_handle_nopin_response_timeout(unsigned long data)
void iscsit_handle_nopin_response_timeout(unsigned long data)
{
struct iscsi_conn *conn = (struct iscsi_conn *) data;
@ -949,14 +951,10 @@ void iscsit_start_nopin_response_timer(struct iscsi_conn *conn)
return;
}
init_timer(&conn->nopin_response_timer);
conn->nopin_response_timer.expires =
(get_jiffies_64() + na->nopin_response_timeout * HZ);
conn->nopin_response_timer.data = (unsigned long)conn;
conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout;
conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP;
conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING;
add_timer(&conn->nopin_response_timer);
mod_timer(&conn->nopin_response_timer,
jiffies + na->nopin_response_timeout * HZ);
pr_debug("Started NOPIN Response Timer on CID: %d to %u"
" seconds\n", conn->cid, na->nopin_response_timeout);
@ -980,7 +978,7 @@ void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn)
spin_unlock_bh(&conn->nopin_timer_lock);
}
static void iscsit_handle_nopin_timeout(unsigned long data)
void iscsit_handle_nopin_timeout(unsigned long data)
{
struct iscsi_conn *conn = (struct iscsi_conn *) data;
@ -1015,13 +1013,9 @@ void __iscsit_start_nopin_timer(struct iscsi_conn *conn)
if (conn->nopin_timer_flags & ISCSI_TF_RUNNING)
return;
init_timer(&conn->nopin_timer);
conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ);
conn->nopin_timer.data = (unsigned long)conn;
conn->nopin_timer.function = iscsit_handle_nopin_timeout;
conn->nopin_timer_flags &= ~ISCSI_TF_STOP;
conn->nopin_timer_flags |= ISCSI_TF_RUNNING;
add_timer(&conn->nopin_timer);
mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ);
pr_debug("Started NOPIN Timer on CID: %d at %u second"
" interval\n", conn->cid, na->nopin_timeout);
@ -1043,13 +1037,9 @@ void iscsit_start_nopin_timer(struct iscsi_conn *conn)
return;
}
init_timer(&conn->nopin_timer);
conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ);
conn->nopin_timer.data = (unsigned long)conn;
conn->nopin_timer.function = iscsit_handle_nopin_timeout;
conn->nopin_timer_flags &= ~ISCSI_TF_STOP;
conn->nopin_timer_flags |= ISCSI_TF_RUNNING;
add_timer(&conn->nopin_timer);
mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ);
pr_debug("Started NOPIN Timer on CID: %d at %u second"
" interval\n", conn->cid, na->nopin_timeout);

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

@ -47,9 +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_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_start_nopin_timer(struct iscsi_conn *);
extern void iscsit_start_nopin_timer(struct iscsi_conn *);
extern void iscsit_stop_nopin_timer(struct iscsi_conn *);