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zed: don't malloc() global zed_conf instance, optimise zed_conf layout
It's all of 40 bytes with 4-byte pointers and 64 with 8-byte ones (previously 44 and 88, respectively) ‒ there's no reason it can't live on the stack Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Closes #11860
This commit is contained in:
наб
Brian Behlendorf
parent
46d50eaf56
commit
346c85b722
@ -216,15 +216,15 @@ _finish_daemonize(void)
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int
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main(int argc, char *argv[])
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{
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struct zed_conf *zcp;
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struct zed_conf zcp;
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uint64_t saved_eid;
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int64_t saved_etime[2];
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zed_log_init(argv[0]);
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zed_log_stderr_open(LOG_NOTICE);
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zcp = zed_conf_create();
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zed_conf_parse_opts(zcp, argc, argv);
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if (zcp->do_verbose)
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zed_conf_init(&zcp);
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zed_conf_parse_opts(&zcp, argc, argv);
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if (zcp.do_verbose)
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zed_log_stderr_open(LOG_INFO);
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if (geteuid() != 0)
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@ -237,32 +237,32 @@ main(int argc, char *argv[])
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if (chdir("/") < 0)
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zed_log_die("Failed to change to root directory");
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if (zed_conf_scan_dir(zcp) < 0)
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if (zed_conf_scan_dir(&zcp) < 0)
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exit(EXIT_FAILURE);
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if (!zcp->do_foreground) {
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if (!zcp.do_foreground) {
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_start_daemonize();
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zed_log_syslog_open(LOG_DAEMON);
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}
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_setup_sig_handlers();
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if (zcp->do_memlock)
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if (zcp.do_memlock)
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_lock_memory();
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if ((zed_conf_write_pid(zcp) < 0) && (!zcp->do_force))
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if ((zed_conf_write_pid(&zcp) < 0) && (!zcp.do_force))
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exit(EXIT_FAILURE);
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if (!zcp->do_foreground)
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if (!zcp.do_foreground)
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_finish_daemonize();
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zed_log_msg(LOG_NOTICE,
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"ZFS Event Daemon %s-%s (PID %d)",
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ZFS_META_VERSION, ZFS_META_RELEASE, (int)getpid());
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if (zed_conf_open_state(zcp) < 0)
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if (zed_conf_open_state(&zcp) < 0)
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exit(EXIT_FAILURE);
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if (zed_conf_read_state(zcp, &saved_eid, saved_etime) < 0)
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if (zed_conf_read_state(&zcp, &saved_eid, saved_etime) < 0)
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exit(EXIT_FAILURE);
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idle:
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@ -271,24 +271,24 @@ idle:
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* successful.
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*/
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do {
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if (!zed_event_init(zcp))
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if (!zed_event_init(&zcp))
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break;
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/* Wait for some time and try again. tunable? */
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sleep(30);
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} while (!_got_exit && zcp->do_idle);
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} while (!_got_exit && zcp.do_idle);
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if (_got_exit)
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goto out;
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zed_event_seek(zcp, saved_eid, saved_etime);
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zed_event_seek(&zcp, saved_eid, saved_etime);
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while (!_got_exit) {
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int rv;
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if (_got_hup) {
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_got_hup = 0;
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(void) zed_conf_scan_dir(zcp);
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(void) zed_conf_scan_dir(&zcp);
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}
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rv = zed_event_service(zcp);
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rv = zed_event_service(&zcp);
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/* ENODEV: When kernel module is unloaded (osx) */
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if (rv == ENODEV)
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@ -296,13 +296,13 @@ idle:
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}
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zed_log_msg(LOG_NOTICE, "Exiting");
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zed_event_fini(zcp);
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zed_event_fini(&zcp);
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if (zcp->do_idle && !_got_exit)
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if (zcp.do_idle && !_got_exit)
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goto idle;
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out:
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zed_conf_destroy(zcp);
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zed_conf_destroy(&zcp);
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zed_log_fini();
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exit(EXIT_SUCCESS);
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}
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@ -32,38 +32,26 @@
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#include "zed_strings.h"
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/*
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* Return a new configuration with default values.
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* Initialise the configuration with default values.
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*/
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struct zed_conf *
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zed_conf_create(void)
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void
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zed_conf_init(struct zed_conf *zcp)
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{
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struct zed_conf *zcp;
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memset(zcp, 0, sizeof (*zcp));
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zcp = calloc(1, sizeof (*zcp));
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if (!zcp)
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goto nomem;
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/* zcp->zfs_hdl opened in zed_event_init() */
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/* zcp->zedlets created in zed_conf_scan_dir() */
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zcp->pid_fd = -1; /* opened in zed_conf_write_pid() */
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zcp->state_fd = -1; /* opened in zed_conf_open_state() */
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zcp->zevent_fd = -1; /* opened in zed_event_init() */
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zcp->pid_fd = -1;
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zcp->zedlets = NULL; /* created via zed_conf_scan_dir() */
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zcp->state_fd = -1; /* opened via zed_conf_open_state() */
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zcp->zfs_hdl = NULL; /* opened via zed_event_init() */
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zcp->zevent_fd = -1; /* opened via zed_event_init() */
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zcp->max_jobs = 16;
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if (!(zcp->pid_file = strdup(ZED_PID_FILE)))
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goto nomem;
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if (!(zcp->zedlet_dir = strdup(ZED_ZEDLET_DIR)))
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goto nomem;
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if (!(zcp->state_file = strdup(ZED_STATE_FILE)))
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goto nomem;
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return (zcp);
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nomem:
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if (!(zcp->pid_file = strdup(ZED_PID_FILE)) ||
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!(zcp->zedlet_dir = strdup(ZED_ZEDLET_DIR)) ||
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!(zcp->state_file = strdup(ZED_STATE_FILE)))
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zed_log_die("Failed to create conf: %s", strerror(errno));
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return (NULL);
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}
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/*
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@ -74,9 +62,6 @@ nomem:
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void
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zed_conf_destroy(struct zed_conf *zcp)
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{
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if (!zcp)
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return;
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if (zcp->state_fd >= 0) {
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if (close(zcp->state_fd) < 0)
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zed_log_msg(LOG_WARNING,
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@ -113,7 +98,6 @@ zed_conf_destroy(struct zed_conf *zcp)
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zed_strings_destroy(zcp->zedlets);
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zcp->zedlets = NULL;
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}
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free(zcp);
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}
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/*
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@ -20,26 +20,29 @@
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#include "zed_strings.h"
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struct zed_conf {
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unsigned do_force:1; /* true if force enabled */
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unsigned do_foreground:1; /* true if run in foreground */
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unsigned do_memlock:1; /* true if locking memory */
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unsigned do_verbose:1; /* true if verbosity enabled */
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unsigned do_zero:1; /* true if zeroing state */
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unsigned do_idle:1; /* true if idle enabled */
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char *pid_file; /* abs path to pid file */
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int pid_fd; /* fd to pid file for lock */
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char *zedlet_dir; /* abs path to zedlet dir */
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zed_strings_t *zedlets; /* names of enabled zedlets */
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char *state_file; /* abs path to state file */
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int state_fd; /* fd to state file */
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libzfs_handle_t *zfs_hdl; /* handle to libzfs */
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int zevent_fd; /* fd for access to zevents */
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zed_strings_t *zedlets; /* names of enabled zedlets */
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char *path; /* custom $PATH for zedlets to use */
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int pid_fd; /* fd to pid file for lock */
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int state_fd; /* fd to state file */
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int zevent_fd; /* fd for access to zevents */
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int16_t max_jobs; /* max zedlets to run at one time */
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boolean_t do_force:1; /* true if force enabled */
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boolean_t do_foreground:1; /* true if run in foreground */
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boolean_t do_memlock:1; /* true if locking memory */
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boolean_t do_verbose:1; /* true if verbosity enabled */
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boolean_t do_zero:1; /* true if zeroing state */
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boolean_t do_idle:1; /* true if idle enabled */
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};
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struct zed_conf *zed_conf_create(void);
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void zed_conf_init(struct zed_conf *zcp);
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void zed_conf_destroy(struct zed_conf *zcp);
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void zed_conf_parse_opts(struct zed_conf *zcp, int argc, char **argv);
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@ -49,9 +52,7 @@ int zed_conf_scan_dir(struct zed_conf *zcp);
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int zed_conf_write_pid(struct zed_conf *zcp);
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int zed_conf_open_state(struct zed_conf *zcp);
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int zed_conf_read_state(struct zed_conf *zcp, uint64_t *eidp, int64_t etime[]);
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int zed_conf_write_state(struct zed_conf *zcp, uint64_t eid, int64_t etime[]);
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#endif /* !ZED_CONF_H */
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