From 8a47aa9dc636db851254615ea79ba91a52cf9206 Mon Sep 17 00:00:00 2001 From: Bart Van Assche Date: Tue, 23 May 2017 16:48:50 -0700 Subject: [PATCH] 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 Reviewed-by: Hannes Reinecke Cc: Christoph Hellwig Cc: Andy Grover Cc: David Disseldorp Signed-off-by: Kees Cook --- drivers/target/iscsi/iscsi_target.c | 3 +++ drivers/target/iscsi/iscsi_target_erl0.c | 10 +++------ drivers/target/iscsi/iscsi_target_erl0.h | 1 + drivers/target/iscsi/iscsi_target_erl1.c | 8 ++----- drivers/target/iscsi/iscsi_target_erl1.h | 1 + drivers/target/iscsi/iscsi_target_login.c | 16 ++++++++------ drivers/target/iscsi/iscsi_target_login.h | 1 + drivers/target/iscsi/iscsi_target_nego.c | 8 +++---- drivers/target/iscsi/iscsi_target_util.c | 26 +++++++---------------- drivers/target/iscsi/iscsi_target_util.h | 2 ++ 10 files changed, 34 insertions(+), 42 deletions(-) diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 5001261f5d69..7d619160b3d3 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -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); diff --git a/drivers/target/iscsi/iscsi_target_erl0.c b/drivers/target/iscsi/iscsi_target_erl0.c index 7fe2aa73cff6..f164098594e9 100644 --- a/drivers/target/iscsi/iscsi_target_erl0.c +++ b/drivers/target/iscsi/iscsi_target_erl0.c @@ -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); } /* diff --git a/drivers/target/iscsi/iscsi_target_erl0.h b/drivers/target/iscsi/iscsi_target_erl0.h index 3822d9cd1230..97e4ae728926 100644 --- a/drivers/target/iscsi/iscsi_target_erl0.h +++ b/drivers/target/iscsi/iscsi_target_erl0.h @@ -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); diff --git a/drivers/target/iscsi/iscsi_target_erl1.c b/drivers/target/iscsi/iscsi_target_erl1.c index fe9b7f1e44ac..19b28255b687 100644 --- a/drivers/target/iscsi/iscsi_target_erl1.c +++ b/drivers/target/iscsi/iscsi_target_erl1.c @@ -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) diff --git a/drivers/target/iscsi/iscsi_target_erl1.h b/drivers/target/iscsi/iscsi_target_erl1.h index 54d36bd25bea..0ff6e310ca36 100644 --- a/drivers/target/iscsi/iscsi_target_erl1.h +++ b/drivers/target/iscsi/iscsi_target_erl1.h @@ -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 *); diff --git a/drivers/target/iscsi/iscsi_target_login.c b/drivers/target/iscsi/iscsi_target_login.c index dc13afbd4c88..8be9221b6b9d 100644 --- a/drivers/target/iscsi/iscsi_target_login.c +++ b/drivers/target/iscsi/iscsi_target_login.c @@ -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; diff --git a/drivers/target/iscsi/iscsi_target_login.h b/drivers/target/iscsi/iscsi_target_login.h index 0e1fd6cedd54..f77850bf3e58 100644 --- a/drivers/target/iscsi/iscsi_target_login.h +++ b/drivers/target/iscsi/iscsi_target_login.h @@ -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 ***/ diff --git a/drivers/target/iscsi/iscsi_target_nego.c b/drivers/target/iscsi/iscsi_target_nego.c index 7a6751fecd32..c851bd9f3175 100644 --- a/drivers/target/iscsi/iscsi_target_nego.c +++ b/drivers/target/iscsi/iscsi_target_nego.c @@ -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); diff --git a/drivers/target/iscsi/iscsi_target_util.c b/drivers/target/iscsi/iscsi_target_util.c index 1e36f83b5961..505dad5dab7f 100644 --- a/drivers/target/iscsi/iscsi_target_util.c +++ b/drivers/target/iscsi/iscsi_target_util.c @@ -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); diff --git a/drivers/target/iscsi/iscsi_target_util.h b/drivers/target/iscsi/iscsi_target_util.h index 425160565d0c..78b3b9d20963 100644 --- a/drivers/target/iscsi/iscsi_target_util.h +++ b/drivers/target/iscsi/iscsi_target_util.h @@ -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 *); -- 2.39.5