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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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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:
parent
d744644ad7
commit
8a47aa9dc6
10 changed files with 34 additions and 42 deletions
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@ -372,6 +372,9 @@ struct iscsi_np *iscsit_add_np(
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init_completion(&np->np_restart_comp);
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INIT_LIST_HEAD(&np->np_list);
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setup_timer(&np->np_login_timer, iscsi_handle_login_thread_timeout,
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(unsigned long)np);
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ret = iscsi_target_setup_login_socket(np, sockaddr);
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if (ret != 0) {
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kfree(np);
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@ -749,7 +749,7 @@ int iscsit_check_post_dataout(
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}
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}
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static void iscsit_handle_time2retain_timeout(unsigned long data)
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void iscsit_handle_time2retain_timeout(unsigned long data)
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{
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struct iscsi_session *sess = (struct iscsi_session *) data;
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struct iscsi_portal_group *tpg = sess->tpg;
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@ -809,14 +809,10 @@ void iscsit_start_time2retain_handler(struct iscsi_session *sess)
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pr_debug("Starting Time2Retain timer for %u seconds on"
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" SID: %u\n", sess->sess_ops->DefaultTime2Retain, sess->sid);
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init_timer(&sess->time2retain_timer);
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sess->time2retain_timer.expires =
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(get_jiffies_64() + sess->sess_ops->DefaultTime2Retain * HZ);
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sess->time2retain_timer.data = (unsigned long)sess;
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sess->time2retain_timer.function = iscsit_handle_time2retain_timeout;
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sess->time2retain_timer_flags &= ~ISCSI_TF_STOP;
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sess->time2retain_timer_flags |= ISCSI_TF_RUNNING;
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add_timer(&sess->time2retain_timer);
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mod_timer(&sess->time2retain_timer,
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jiffies + sess->sess_ops->DefaultTime2Retain * HZ);
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}
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/*
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@ -11,6 +11,7 @@ extern void iscsit_set_dataout_sequence_values(struct iscsi_cmd *);
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extern int iscsit_check_pre_dataout(struct iscsi_cmd *, unsigned char *);
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extern int iscsit_check_post_dataout(struct iscsi_cmd *, unsigned char *, u8);
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extern void iscsit_start_time2retain_handler(struct iscsi_session *);
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extern void iscsit_handle_time2retain_timeout(unsigned long data);
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extern int iscsit_stop_time2retain_timer(struct iscsi_session *);
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extern void iscsit_connection_reinstatement_rcfr(struct iscsi_conn *);
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extern void iscsit_cause_connection_reinstatement(struct iscsi_conn *, int);
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@ -1148,7 +1148,7 @@ static int iscsit_set_dataout_timeout_values(
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/*
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* NOTE: Called from interrupt (timer) context.
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*/
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static void iscsit_handle_dataout_timeout(unsigned long data)
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void iscsit_handle_dataout_timeout(unsigned long data)
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{
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u32 pdu_length = 0, pdu_offset = 0;
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u32 r2t_length = 0, r2t_offset = 0;
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@ -1264,13 +1264,9 @@ void iscsit_start_dataout_timer(
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pr_debug("Starting DataOUT timer for ITT: 0x%08x on"
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" CID: %hu.\n", cmd->init_task_tag, conn->cid);
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init_timer(&cmd->dataout_timer);
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cmd->dataout_timer.expires = (get_jiffies_64() + na->dataout_timeout * HZ);
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cmd->dataout_timer.data = (unsigned long)cmd;
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cmd->dataout_timer.function = iscsit_handle_dataout_timeout;
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cmd->dataout_timer_flags &= ~ISCSI_TF_STOP;
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cmd->dataout_timer_flags |= ISCSI_TF_RUNNING;
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add_timer(&cmd->dataout_timer);
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mod_timer(&cmd->dataout_timer, jiffies + na->dataout_timeout * HZ);
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}
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void iscsit_stop_dataout_timer(struct iscsi_cmd *cmd)
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@ -29,6 +29,7 @@ extern int iscsit_execute_ooo_cmdsns(struct iscsi_session *);
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extern int iscsit_execute_cmd(struct iscsi_cmd *, int);
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extern int iscsit_handle_ooo_cmdsn(struct iscsi_session *, struct iscsi_cmd *, u32);
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extern void iscsit_remove_ooo_cmdsn(struct iscsi_session *, struct iscsi_ooo_cmdsn *);
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extern void iscsit_handle_dataout_timeout(unsigned long data);
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extern void iscsit_mod_dataout_timer(struct iscsi_cmd *);
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extern void iscsit_start_dataout_timer(struct iscsi_cmd *, struct iscsi_conn *);
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extern void iscsit_stop_dataout_timer(struct iscsi_cmd *);
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@ -333,6 +333,9 @@ static int iscsi_login_zero_tsih_s1(
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spin_lock_init(&sess->session_usage_lock);
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spin_lock_init(&sess->ttt_lock);
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setup_timer(&sess->time2retain_timer, iscsit_handle_time2retain_timeout,
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(unsigned long)sess);
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idr_preload(GFP_KERNEL);
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spin_lock_bh(&sess_idr_lock);
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ret = idr_alloc(&sess_idr, NULL, 0, 0, GFP_NOWAIT);
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@ -839,7 +842,7 @@ void iscsi_post_login_handler(
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iscsit_dec_conn_usage_count(conn);
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}
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static void iscsi_handle_login_thread_timeout(unsigned long data)
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void iscsi_handle_login_thread_timeout(unsigned long data)
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{
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struct iscsi_np *np = (struct iscsi_np *) data;
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@ -866,13 +869,9 @@ static void iscsi_start_login_thread_timer(struct iscsi_np *np)
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* point we do not have access to ISCSI_TPG_ATTRIB(tpg)->login_timeout
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*/
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spin_lock_bh(&np->np_thread_lock);
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init_timer(&np->np_login_timer);
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np->np_login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ);
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np->np_login_timer.data = (unsigned long)np;
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np->np_login_timer.function = iscsi_handle_login_thread_timeout;
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np->np_login_timer_flags &= ~ISCSI_TF_STOP;
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np->np_login_timer_flags |= ISCSI_TF_RUNNING;
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add_timer(&np->np_login_timer);
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mod_timer(&np->np_login_timer, jiffies + TA_LOGIN_TIMEOUT * HZ);
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pr_debug("Added timeout timer to iSCSI login request for"
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" %u seconds.\n", TA_LOGIN_TIMEOUT);
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@ -1266,6 +1265,11 @@ static int __iscsi_target_login_thread(struct iscsi_np *np)
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pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
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conn->conn_state = TARG_CONN_STATE_FREE;
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setup_timer(&conn->nopin_response_timer,
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iscsit_handle_nopin_response_timeout, (unsigned long)conn);
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setup_timer(&conn->nopin_timer, iscsit_handle_nopin_timeout,
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(unsigned long)conn);
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if (iscsit_conn_set_transport(conn, np->np_transport) < 0) {
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kfree(conn);
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return 1;
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@ -24,5 +24,6 @@ extern void iscsi_post_login_handler(struct iscsi_np *, struct iscsi_conn *, u8)
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extern void iscsi_target_login_sess_out(struct iscsi_conn *, struct iscsi_np *,
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bool, bool);
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extern int iscsi_target_login_thread(void *);
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extern void iscsi_handle_login_thread_timeout(unsigned long data);
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#endif /*** ISCSI_TARGET_LOGIN_H ***/
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@ -618,11 +618,9 @@ static void iscsi_target_do_login_rx(struct work_struct *work)
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conn->login_kworker = current;
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allow_signal(SIGINT);
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init_timer(&login_timer);
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login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ);
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login_timer.data = (unsigned long)conn;
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login_timer.function = iscsi_target_login_timeout;
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add_timer(&login_timer);
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setup_timer_on_stack(&login_timer, iscsi_target_login_timeout,
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(unsigned long)conn);
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mod_timer(&login_timer, jiffies + TA_LOGIN_TIMEOUT * HZ);
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pr_debug("Starting login_timer for %s/%d\n", current->comm, current->pid);
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rc = conn->conn_transport->iscsit_get_login_rx(conn, login);
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@ -176,6 +176,8 @@ struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, int state)
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spin_lock_init(&cmd->istate_lock);
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spin_lock_init(&cmd->error_lock);
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spin_lock_init(&cmd->r2t_lock);
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setup_timer(&cmd->dataout_timer, iscsit_handle_dataout_timeout,
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(unsigned long)cmd);
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return cmd;
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}
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@ -880,7 +882,7 @@ static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response)
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return 0;
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}
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static void iscsit_handle_nopin_response_timeout(unsigned long data)
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void iscsit_handle_nopin_response_timeout(unsigned long data)
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{
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struct iscsi_conn *conn = (struct iscsi_conn *) data;
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@ -949,14 +951,10 @@ void iscsit_start_nopin_response_timer(struct iscsi_conn *conn)
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return;
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}
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init_timer(&conn->nopin_response_timer);
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conn->nopin_response_timer.expires =
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(get_jiffies_64() + na->nopin_response_timeout * HZ);
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conn->nopin_response_timer.data = (unsigned long)conn;
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conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout;
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conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP;
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conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING;
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add_timer(&conn->nopin_response_timer);
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mod_timer(&conn->nopin_response_timer,
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jiffies + na->nopin_response_timeout * HZ);
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pr_debug("Started NOPIN Response Timer on CID: %d to %u"
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" seconds\n", conn->cid, na->nopin_response_timeout);
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@ -980,7 +978,7 @@ void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn)
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spin_unlock_bh(&conn->nopin_timer_lock);
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}
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static void iscsit_handle_nopin_timeout(unsigned long data)
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void iscsit_handle_nopin_timeout(unsigned long data)
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{
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struct iscsi_conn *conn = (struct iscsi_conn *) data;
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@ -1015,13 +1013,9 @@ void __iscsit_start_nopin_timer(struct iscsi_conn *conn)
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if (conn->nopin_timer_flags & ISCSI_TF_RUNNING)
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return;
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init_timer(&conn->nopin_timer);
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conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ);
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conn->nopin_timer.data = (unsigned long)conn;
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conn->nopin_timer.function = iscsit_handle_nopin_timeout;
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conn->nopin_timer_flags &= ~ISCSI_TF_STOP;
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conn->nopin_timer_flags |= ISCSI_TF_RUNNING;
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add_timer(&conn->nopin_timer);
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mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ);
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pr_debug("Started NOPIN Timer on CID: %d at %u second"
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" interval\n", conn->cid, na->nopin_timeout);
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@ -1043,13 +1037,9 @@ void iscsit_start_nopin_timer(struct iscsi_conn *conn)
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return;
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}
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init_timer(&conn->nopin_timer);
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conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ);
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conn->nopin_timer.data = (unsigned long)conn;
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conn->nopin_timer.function = iscsit_handle_nopin_timeout;
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conn->nopin_timer_flags &= ~ISCSI_TF_STOP;
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conn->nopin_timer_flags |= ISCSI_TF_RUNNING;
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add_timer(&conn->nopin_timer);
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mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ);
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pr_debug("Started NOPIN Timer on CID: %d at %u second"
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" interval\n", conn->cid, na->nopin_timeout);
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@ -47,9 +47,11 @@ extern struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *,
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extern void iscsit_check_conn_usage_count(struct iscsi_conn *);
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extern void iscsit_dec_conn_usage_count(struct iscsi_conn *);
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extern void iscsit_inc_conn_usage_count(struct iscsi_conn *);
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extern void iscsit_handle_nopin_response_timeout(unsigned long data);
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extern void iscsit_mod_nopin_response_timer(struct iscsi_conn *);
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extern void iscsit_start_nopin_response_timer(struct iscsi_conn *);
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extern void iscsit_stop_nopin_response_timer(struct iscsi_conn *);
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extern void iscsit_handle_nopin_timeout(unsigned long data);
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extern void __iscsit_start_nopin_timer(struct iscsi_conn *);
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extern void iscsit_start_nopin_timer(struct iscsi_conn *);
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extern void iscsit_stop_nopin_timer(struct iscsi_conn *);
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