953 lines
24 KiB
C
953 lines
24 KiB
C
/*
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* This file is part of the ZFS Event Daemon (ZED)
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* for ZFS on Linux (ZoL) <http://zfsonlinux.org/>.
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* Developed at Lawrence Livermore National Laboratory (LLNL-CODE-403049).
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* Copyright (C) 2013-2014 Lawrence Livermore National Security, LLC.
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* Refer to the ZoL git commit log for authoritative copyright attribution.
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License Version 1.0 (CDDL-1.0).
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* You can obtain a copy of the license from the top-level file
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* "OPENSOLARIS.LICENSE" or at <http://opensource.org/licenses/CDDL-1.0>.
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* You may not use this file except in compliance with the license.
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*/
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <libzfs.h> /* FIXME: Replace with libzfs_core. */
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#include <paths.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/zfs_ioctl.h>
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#include <time.h>
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#include <unistd.h>
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#include <sys/fm/fs/zfs.h>
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#include "zed.h"
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#include "zed_conf.h"
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#include "zed_disk_event.h"
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#include "zed_exec.h"
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#include "zed_file.h"
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#include "zed_log.h"
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#include "zed_strings.h"
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#include "agents/zfs_agents.h"
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#define MAXBUF 4096
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/*
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* Open the libzfs interface.
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*/
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void
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zed_event_init(struct zed_conf *zcp)
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{
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if (!zcp)
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zed_log_die("Failed zed_event_init: %s", strerror(EINVAL));
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zcp->zfs_hdl = libzfs_init();
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if (!zcp->zfs_hdl)
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zed_log_die("Failed to initialize libzfs");
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zcp->zevent_fd = open(ZFS_DEV, O_RDWR);
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if (zcp->zevent_fd < 0)
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zed_log_die("Failed to open \"%s\": %s",
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ZFS_DEV, strerror(errno));
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zfs_agent_init(zcp->zfs_hdl);
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if (zed_disk_event_init() != 0)
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zed_log_die("Failed to initialize disk events");
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}
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/*
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* Close the libzfs interface.
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*/
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void
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zed_event_fini(struct zed_conf *zcp)
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{
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if (!zcp)
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zed_log_die("Failed zed_event_fini: %s", strerror(EINVAL));
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zed_disk_event_fini();
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zfs_agent_fini();
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if (zcp->zevent_fd >= 0) {
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if (close(zcp->zevent_fd) < 0)
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zed_log_msg(LOG_WARNING, "Failed to close \"%s\": %s",
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ZFS_DEV, strerror(errno));
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zcp->zevent_fd = -1;
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}
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if (zcp->zfs_hdl) {
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libzfs_fini(zcp->zfs_hdl);
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zcp->zfs_hdl = NULL;
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}
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}
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/*
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* Seek to the event specified by [saved_eid] and [saved_etime].
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* This protects against processing a given event more than once.
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* Return 0 upon a successful seek to the specified event, or -1 otherwise.
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*
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* A zevent is considered to be uniquely specified by its (eid,time) tuple.
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* The unsigned 64b eid is set to 1 when the kernel module is loaded, and
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* incremented by 1 for each new event. Since the state file can persist
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* across a kernel module reload, the time must be checked to ensure a match.
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*/
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int
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zed_event_seek(struct zed_conf *zcp, uint64_t saved_eid, int64_t saved_etime[])
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{
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uint64_t eid;
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int found;
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nvlist_t *nvl;
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int n_dropped;
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int64_t *etime;
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uint_t nelem;
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int rv;
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if (!zcp) {
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errno = EINVAL;
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zed_log_msg(LOG_ERR, "Failed to seek zevent: %s",
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strerror(errno));
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return (-1);
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}
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eid = 0;
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found = 0;
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while ((eid < saved_eid) && !found) {
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rv = zpool_events_next(zcp->zfs_hdl, &nvl, &n_dropped,
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ZEVENT_NONBLOCK, zcp->zevent_fd);
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if ((rv != 0) || !nvl)
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break;
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if (n_dropped > 0) {
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zed_log_msg(LOG_WARNING, "Missed %d events", n_dropped);
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/*
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* FIXME: Increase max size of event nvlist in
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* /sys/module/zfs/parameters/zfs_zevent_len_max ?
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*/
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}
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if (nvlist_lookup_uint64(nvl, "eid", &eid) != 0) {
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zed_log_msg(LOG_WARNING, "Failed to lookup zevent eid");
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} else if (nvlist_lookup_int64_array(nvl, "time",
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&etime, &nelem) != 0) {
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zed_log_msg(LOG_WARNING,
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"Failed to lookup zevent time (eid=%llu)", eid);
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} else if (nelem != 2) {
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zed_log_msg(LOG_WARNING,
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"Failed to lookup zevent time (eid=%llu, nelem=%u)",
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eid, nelem);
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} else if ((eid != saved_eid) ||
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(etime[0] != saved_etime[0]) ||
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(etime[1] != saved_etime[1])) {
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/* no-op */
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} else {
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found = 1;
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}
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free(nvl);
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}
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if (!found && (saved_eid > 0)) {
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if (zpool_events_seek(zcp->zfs_hdl, ZEVENT_SEEK_START,
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zcp->zevent_fd) < 0)
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zed_log_msg(LOG_WARNING, "Failed to seek to eid=0");
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else
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eid = 0;
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}
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zed_log_msg(LOG_NOTICE, "Processing events since eid=%llu", eid);
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return (found ? 0 : -1);
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}
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/*
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* Return non-zero if nvpair [name] should be formatted in hex; o/w, return 0.
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*/
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static int
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_zed_event_value_is_hex(const char *name)
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{
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const char *hex_suffix[] = {
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"_guid",
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"_guids",
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NULL
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};
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const char **pp;
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char *p;
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if (!name)
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return (0);
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for (pp = hex_suffix; *pp; pp++) {
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p = strstr(name, *pp);
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if (p && strlen(p) == strlen(*pp))
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return (1);
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}
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return (0);
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}
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/*
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* Add an environment variable for [eid] to the container [zsp].
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*
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* The variable name is the concatenation of [prefix] and [name] converted to
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* uppercase with non-alphanumeric characters converted to underscores;
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* [prefix] is optional, and [name] must begin with an alphabetic character.
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* If the converted variable name already exists within the container [zsp],
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* its existing value will be replaced with the new value.
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*
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* The variable value is specified by the format string [fmt].
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*
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* Returns 0 on success, and -1 on error (with errno set).
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*
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* All environment variables in [zsp] should be added through this function.
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*/
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static int
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_zed_event_add_var(uint64_t eid, zed_strings_t *zsp,
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const char *prefix, const char *name, const char *fmt, ...)
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{
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char keybuf[MAXBUF];
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char valbuf[MAXBUF];
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char *dstp;
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const char *srcp;
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const char *lastp;
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int n;
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int buflen;
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va_list vargs;
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assert(zsp != NULL);
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assert(fmt != NULL);
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if (!name) {
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errno = EINVAL;
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zed_log_msg(LOG_WARNING,
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"Failed to add variable for eid=%llu: Name is empty", eid);
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return (-1);
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} else if (!isalpha(name[0])) {
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errno = EINVAL;
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zed_log_msg(LOG_WARNING,
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"Failed to add variable for eid=%llu: "
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"Name \"%s\" is invalid", eid, name);
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return (-1);
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}
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/*
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* Construct the string key by converting PREFIX (if present) and NAME.
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*/
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dstp = keybuf;
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lastp = keybuf + sizeof (keybuf);
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if (prefix) {
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for (srcp = prefix; *srcp && (dstp < lastp); srcp++)
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*dstp++ = isalnum(*srcp) ? toupper(*srcp) : '_';
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}
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for (srcp = name; *srcp && (dstp < lastp); srcp++)
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*dstp++ = isalnum(*srcp) ? toupper(*srcp) : '_';
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if (dstp == lastp) {
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errno = ENAMETOOLONG;
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zed_log_msg(LOG_WARNING,
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"Failed to add variable for eid=%llu: Name too long", eid);
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return (-1);
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}
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*dstp = '\0';
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/*
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* Construct the string specified by "[PREFIX][NAME]=[FMT]".
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*/
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dstp = valbuf;
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buflen = sizeof (valbuf);
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n = strlcpy(dstp, keybuf, buflen);
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if (n >= sizeof (valbuf)) {
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errno = EMSGSIZE;
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zed_log_msg(LOG_WARNING, "Failed to add %s for eid=%llu: %s",
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keybuf, eid, "Exceeded buffer size");
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return (-1);
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}
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dstp += n;
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buflen -= n;
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*dstp++ = '=';
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buflen--;
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if (buflen <= 0) {
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errno = EMSGSIZE;
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zed_log_msg(LOG_WARNING, "Failed to add %s for eid=%llu: %s",
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keybuf, eid, "Exceeded buffer size");
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return (-1);
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}
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va_start(vargs, fmt);
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n = vsnprintf(dstp, buflen, fmt, vargs);
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va_end(vargs);
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if ((n < 0) || (n >= buflen)) {
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errno = EMSGSIZE;
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zed_log_msg(LOG_WARNING, "Failed to add %s for eid=%llu: %s",
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keybuf, eid, "Exceeded buffer size");
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return (-1);
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} else if (zed_strings_add(zsp, keybuf, valbuf) < 0) {
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zed_log_msg(LOG_WARNING, "Failed to add %s for eid=%llu: %s",
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keybuf, eid, strerror(errno));
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return (-1);
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}
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return (0);
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}
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static int
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_zed_event_add_array_err(uint64_t eid, const char *name)
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{
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errno = EMSGSIZE;
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zed_log_msg(LOG_WARNING,
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"Failed to convert nvpair \"%s\" for eid=%llu: "
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"Exceeded buffer size", name, eid);
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return (-1);
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}
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static int
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_zed_event_add_int8_array(uint64_t eid, zed_strings_t *zsp,
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const char *prefix, nvpair_t *nvp)
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{
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char buf[MAXBUF];
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int buflen = sizeof (buf);
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const char *name;
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int8_t *i8p;
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uint_t nelem;
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uint_t i;
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char *p;
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int n;
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assert((nvp != NULL) && (nvpair_type(nvp) == DATA_TYPE_INT8_ARRAY));
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name = nvpair_name(nvp);
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(void) nvpair_value_int8_array(nvp, &i8p, &nelem);
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for (i = 0, p = buf; (i < nelem) && (buflen > 0); i++) {
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n = snprintf(p, buflen, "%d ", i8p[i]);
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if ((n < 0) || (n >= buflen))
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return (_zed_event_add_array_err(eid, name));
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p += n;
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buflen -= n;
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}
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if (nelem > 0)
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*--p = '\0';
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return (_zed_event_add_var(eid, zsp, prefix, name, "%s", buf));
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}
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static int
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_zed_event_add_uint8_array(uint64_t eid, zed_strings_t *zsp,
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const char *prefix, nvpair_t *nvp)
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{
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char buf[MAXBUF];
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int buflen = sizeof (buf);
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const char *name;
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uint8_t *u8p;
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uint_t nelem;
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uint_t i;
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char *p;
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int n;
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assert((nvp != NULL) && (nvpair_type(nvp) == DATA_TYPE_UINT8_ARRAY));
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name = nvpair_name(nvp);
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(void) nvpair_value_uint8_array(nvp, &u8p, &nelem);
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for (i = 0, p = buf; (i < nelem) && (buflen > 0); i++) {
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n = snprintf(p, buflen, "%u ", u8p[i]);
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if ((n < 0) || (n >= buflen))
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return (_zed_event_add_array_err(eid, name));
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p += n;
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buflen -= n;
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}
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if (nelem > 0)
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*--p = '\0';
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return (_zed_event_add_var(eid, zsp, prefix, name, "%s", buf));
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}
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static int
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_zed_event_add_int16_array(uint64_t eid, zed_strings_t *zsp,
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const char *prefix, nvpair_t *nvp)
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{
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char buf[MAXBUF];
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int buflen = sizeof (buf);
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const char *name;
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int16_t *i16p;
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uint_t nelem;
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uint_t i;
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char *p;
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int n;
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assert((nvp != NULL) && (nvpair_type(nvp) == DATA_TYPE_INT16_ARRAY));
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name = nvpair_name(nvp);
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(void) nvpair_value_int16_array(nvp, &i16p, &nelem);
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for (i = 0, p = buf; (i < nelem) && (buflen > 0); i++) {
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n = snprintf(p, buflen, "%d ", i16p[i]);
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if ((n < 0) || (n >= buflen))
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return (_zed_event_add_array_err(eid, name));
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p += n;
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buflen -= n;
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}
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if (nelem > 0)
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*--p = '\0';
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return (_zed_event_add_var(eid, zsp, prefix, name, "%s", buf));
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}
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static int
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_zed_event_add_uint16_array(uint64_t eid, zed_strings_t *zsp,
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const char *prefix, nvpair_t *nvp)
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{
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char buf[MAXBUF];
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int buflen = sizeof (buf);
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const char *name;
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uint16_t *u16p;
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uint_t nelem;
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uint_t i;
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char *p;
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int n;
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assert((nvp != NULL) && (nvpair_type(nvp) == DATA_TYPE_UINT16_ARRAY));
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name = nvpair_name(nvp);
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(void) nvpair_value_uint16_array(nvp, &u16p, &nelem);
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for (i = 0, p = buf; (i < nelem) && (buflen > 0); i++) {
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n = snprintf(p, buflen, "%u ", u16p[i]);
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if ((n < 0) || (n >= buflen))
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return (_zed_event_add_array_err(eid, name));
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p += n;
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buflen -= n;
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}
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if (nelem > 0)
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*--p = '\0';
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return (_zed_event_add_var(eid, zsp, prefix, name, "%s", buf));
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}
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static int
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_zed_event_add_int32_array(uint64_t eid, zed_strings_t *zsp,
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const char *prefix, nvpair_t *nvp)
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{
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char buf[MAXBUF];
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int buflen = sizeof (buf);
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const char *name;
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int32_t *i32p;
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uint_t nelem;
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uint_t i;
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char *p;
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int n;
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assert((nvp != NULL) && (nvpair_type(nvp) == DATA_TYPE_INT32_ARRAY));
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name = nvpair_name(nvp);
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(void) nvpair_value_int32_array(nvp, &i32p, &nelem);
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for (i = 0, p = buf; (i < nelem) && (buflen > 0); i++) {
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n = snprintf(p, buflen, "%d ", i32p[i]);
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if ((n < 0) || (n >= buflen))
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return (_zed_event_add_array_err(eid, name));
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p += n;
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buflen -= n;
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}
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if (nelem > 0)
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*--p = '\0';
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return (_zed_event_add_var(eid, zsp, prefix, name, "%s", buf));
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}
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static int
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_zed_event_add_uint32_array(uint64_t eid, zed_strings_t *zsp,
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const char *prefix, nvpair_t *nvp)
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{
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char buf[MAXBUF];
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int buflen = sizeof (buf);
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const char *name;
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uint32_t *u32p;
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uint_t nelem;
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uint_t i;
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char *p;
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int n;
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assert((nvp != NULL) && (nvpair_type(nvp) == DATA_TYPE_UINT32_ARRAY));
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name = nvpair_name(nvp);
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(void) nvpair_value_uint32_array(nvp, &u32p, &nelem);
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for (i = 0, p = buf; (i < nelem) && (buflen > 0); i++) {
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n = snprintf(p, buflen, "%u ", u32p[i]);
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if ((n < 0) || (n >= buflen))
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return (_zed_event_add_array_err(eid, name));
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p += n;
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buflen -= n;
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}
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if (nelem > 0)
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*--p = '\0';
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return (_zed_event_add_var(eid, zsp, prefix, name, "%s", buf));
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}
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static int
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_zed_event_add_int64_array(uint64_t eid, zed_strings_t *zsp,
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const char *prefix, nvpair_t *nvp)
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{
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char buf[MAXBUF];
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int buflen = sizeof (buf);
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const char *name;
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int64_t *i64p;
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uint_t nelem;
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uint_t i;
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|
char *p;
|
|
int n;
|
|
|
|
assert((nvp != NULL) && (nvpair_type(nvp) == DATA_TYPE_INT64_ARRAY));
|
|
|
|
name = nvpair_name(nvp);
|
|
(void) nvpair_value_int64_array(nvp, &i64p, &nelem);
|
|
for (i = 0, p = buf; (i < nelem) && (buflen > 0); i++) {
|
|
n = snprintf(p, buflen, "%lld ", (u_longlong_t)i64p[i]);
|
|
if ((n < 0) || (n >= buflen))
|
|
return (_zed_event_add_array_err(eid, name));
|
|
p += n;
|
|
buflen -= n;
|
|
}
|
|
if (nelem > 0)
|
|
*--p = '\0';
|
|
|
|
return (_zed_event_add_var(eid, zsp, prefix, name, "%s", buf));
|
|
}
|
|
|
|
static int
|
|
_zed_event_add_uint64_array(uint64_t eid, zed_strings_t *zsp,
|
|
const char *prefix, nvpair_t *nvp)
|
|
{
|
|
char buf[MAXBUF];
|
|
int buflen = sizeof (buf);
|
|
const char *name;
|
|
const char *fmt;
|
|
uint64_t *u64p;
|
|
uint_t nelem;
|
|
uint_t i;
|
|
char *p;
|
|
int n;
|
|
|
|
assert((nvp != NULL) && (nvpair_type(nvp) == DATA_TYPE_UINT64_ARRAY));
|
|
|
|
name = nvpair_name(nvp);
|
|
fmt = _zed_event_value_is_hex(name) ? "0x%.16llX " : "%llu ";
|
|
(void) nvpair_value_uint64_array(nvp, &u64p, &nelem);
|
|
for (i = 0, p = buf; (i < nelem) && (buflen > 0); i++) {
|
|
n = snprintf(p, buflen, fmt, (u_longlong_t)u64p[i]);
|
|
if ((n < 0) || (n >= buflen))
|
|
return (_zed_event_add_array_err(eid, name));
|
|
p += n;
|
|
buflen -= n;
|
|
}
|
|
if (nelem > 0)
|
|
*--p = '\0';
|
|
|
|
return (_zed_event_add_var(eid, zsp, prefix, name, "%s", buf));
|
|
}
|
|
|
|
static int
|
|
_zed_event_add_string_array(uint64_t eid, zed_strings_t *zsp,
|
|
const char *prefix, nvpair_t *nvp)
|
|
{
|
|
char buf[MAXBUF];
|
|
int buflen = sizeof (buf);
|
|
const char *name;
|
|
char **strp;
|
|
uint_t nelem;
|
|
uint_t i;
|
|
char *p;
|
|
int n;
|
|
|
|
assert((nvp != NULL) && (nvpair_type(nvp) == DATA_TYPE_STRING_ARRAY));
|
|
|
|
name = nvpair_name(nvp);
|
|
(void) nvpair_value_string_array(nvp, &strp, &nelem);
|
|
for (i = 0, p = buf; (i < nelem) && (buflen > 0); i++) {
|
|
n = snprintf(p, buflen, "%s ", strp[i] ? strp[i] : "<NULL>");
|
|
if ((n < 0) || (n >= buflen))
|
|
return (_zed_event_add_array_err(eid, name));
|
|
p += n;
|
|
buflen -= n;
|
|
}
|
|
if (nelem > 0)
|
|
*--p = '\0';
|
|
|
|
return (_zed_event_add_var(eid, zsp, prefix, name, "%s", buf));
|
|
}
|
|
|
|
/*
|
|
* Convert the nvpair [nvp] to a string which is added to the environment
|
|
* of the child process.
|
|
* Return 0 on success, -1 on error.
|
|
*
|
|
* FIXME: Refactor with cmd/zpool/zpool_main.c:zpool_do_events_nvprint()?
|
|
*/
|
|
static void
|
|
_zed_event_add_nvpair(uint64_t eid, zed_strings_t *zsp, nvpair_t *nvp)
|
|
{
|
|
const char *name;
|
|
data_type_t type;
|
|
const char *prefix = ZEVENT_VAR_PREFIX;
|
|
boolean_t b;
|
|
double d;
|
|
uint8_t i8;
|
|
uint16_t i16;
|
|
uint32_t i32;
|
|
uint64_t i64;
|
|
char *str;
|
|
|
|
assert(zsp != NULL);
|
|
assert(nvp != NULL);
|
|
|
|
name = nvpair_name(nvp);
|
|
type = nvpair_type(nvp);
|
|
|
|
switch (type) {
|
|
case DATA_TYPE_BOOLEAN:
|
|
_zed_event_add_var(eid, zsp, prefix, name, "%s", "1");
|
|
break;
|
|
case DATA_TYPE_BOOLEAN_VALUE:
|
|
(void) nvpair_value_boolean_value(nvp, &b);
|
|
_zed_event_add_var(eid, zsp, prefix, name, "%s", b ? "1" : "0");
|
|
break;
|
|
case DATA_TYPE_BYTE:
|
|
(void) nvpair_value_byte(nvp, &i8);
|
|
_zed_event_add_var(eid, zsp, prefix, name, "%d", i8);
|
|
break;
|
|
case DATA_TYPE_INT8:
|
|
(void) nvpair_value_int8(nvp, (int8_t *)&i8);
|
|
_zed_event_add_var(eid, zsp, prefix, name, "%d", i8);
|
|
break;
|
|
case DATA_TYPE_UINT8:
|
|
(void) nvpair_value_uint8(nvp, &i8);
|
|
_zed_event_add_var(eid, zsp, prefix, name, "%u", i8);
|
|
break;
|
|
case DATA_TYPE_INT16:
|
|
(void) nvpair_value_int16(nvp, (int16_t *)&i16);
|
|
_zed_event_add_var(eid, zsp, prefix, name, "%d", i16);
|
|
break;
|
|
case DATA_TYPE_UINT16:
|
|
(void) nvpair_value_uint16(nvp, &i16);
|
|
_zed_event_add_var(eid, zsp, prefix, name, "%u", i16);
|
|
break;
|
|
case DATA_TYPE_INT32:
|
|
(void) nvpair_value_int32(nvp, (int32_t *)&i32);
|
|
_zed_event_add_var(eid, zsp, prefix, name, "%d", i32);
|
|
break;
|
|
case DATA_TYPE_UINT32:
|
|
(void) nvpair_value_uint32(nvp, &i32);
|
|
_zed_event_add_var(eid, zsp, prefix, name, "%u", i32);
|
|
break;
|
|
case DATA_TYPE_INT64:
|
|
(void) nvpair_value_int64(nvp, (int64_t *)&i64);
|
|
_zed_event_add_var(eid, zsp, prefix, name,
|
|
"%lld", (longlong_t)i64);
|
|
break;
|
|
case DATA_TYPE_UINT64:
|
|
(void) nvpair_value_uint64(nvp, &i64);
|
|
_zed_event_add_var(eid, zsp, prefix, name,
|
|
(_zed_event_value_is_hex(name) ? "0x%.16llX" : "%llu"),
|
|
(u_longlong_t)i64);
|
|
/*
|
|
* shadow readable strings for vdev state pairs
|
|
*/
|
|
if (strcmp(name, FM_EREPORT_PAYLOAD_ZFS_VDEV_STATE) == 0 ||
|
|
strcmp(name, FM_EREPORT_PAYLOAD_ZFS_VDEV_LASTSTATE) == 0) {
|
|
char alt[32];
|
|
|
|
(void) snprintf(alt, sizeof (alt), "%s_str", name);
|
|
_zed_event_add_var(eid, zsp, prefix, alt, "%s",
|
|
zpool_state_to_name(i64, VDEV_AUX_NONE));
|
|
} else
|
|
/*
|
|
* shadow readable strings for pool state
|
|
*/
|
|
if (strcmp(name, FM_EREPORT_PAYLOAD_ZFS_POOL_STATE) == 0) {
|
|
char alt[32];
|
|
|
|
(void) snprintf(alt, sizeof (alt), "%s_str", name);
|
|
_zed_event_add_var(eid, zsp, prefix, alt, "%s",
|
|
zpool_pool_state_to_name(i64));
|
|
}
|
|
break;
|
|
case DATA_TYPE_DOUBLE:
|
|
(void) nvpair_value_double(nvp, &d);
|
|
_zed_event_add_var(eid, zsp, prefix, name, "%g", d);
|
|
break;
|
|
case DATA_TYPE_HRTIME:
|
|
(void) nvpair_value_hrtime(nvp, (hrtime_t *)&i64);
|
|
_zed_event_add_var(eid, zsp, prefix, name,
|
|
"%llu", (u_longlong_t)i64);
|
|
break;
|
|
case DATA_TYPE_NVLIST:
|
|
_zed_event_add_var(eid, zsp, prefix, name,
|
|
"%s", "_NOT_IMPLEMENTED_"); /* FIXME */
|
|
break;
|
|
case DATA_TYPE_STRING:
|
|
(void) nvpair_value_string(nvp, &str);
|
|
_zed_event_add_var(eid, zsp, prefix, name,
|
|
"%s", (str ? str : "<NULL>"));
|
|
break;
|
|
case DATA_TYPE_BOOLEAN_ARRAY:
|
|
_zed_event_add_var(eid, zsp, prefix, name,
|
|
"%s", "_NOT_IMPLEMENTED_"); /* FIXME */
|
|
break;
|
|
case DATA_TYPE_BYTE_ARRAY:
|
|
_zed_event_add_var(eid, zsp, prefix, name,
|
|
"%s", "_NOT_IMPLEMENTED_"); /* FIXME */
|
|
break;
|
|
case DATA_TYPE_INT8_ARRAY:
|
|
_zed_event_add_int8_array(eid, zsp, prefix, nvp);
|
|
break;
|
|
case DATA_TYPE_UINT8_ARRAY:
|
|
_zed_event_add_uint8_array(eid, zsp, prefix, nvp);
|
|
break;
|
|
case DATA_TYPE_INT16_ARRAY:
|
|
_zed_event_add_int16_array(eid, zsp, prefix, nvp);
|
|
break;
|
|
case DATA_TYPE_UINT16_ARRAY:
|
|
_zed_event_add_uint16_array(eid, zsp, prefix, nvp);
|
|
break;
|
|
case DATA_TYPE_INT32_ARRAY:
|
|
_zed_event_add_int32_array(eid, zsp, prefix, nvp);
|
|
break;
|
|
case DATA_TYPE_UINT32_ARRAY:
|
|
_zed_event_add_uint32_array(eid, zsp, prefix, nvp);
|
|
break;
|
|
case DATA_TYPE_INT64_ARRAY:
|
|
_zed_event_add_int64_array(eid, zsp, prefix, nvp);
|
|
break;
|
|
case DATA_TYPE_UINT64_ARRAY:
|
|
_zed_event_add_uint64_array(eid, zsp, prefix, nvp);
|
|
break;
|
|
case DATA_TYPE_STRING_ARRAY:
|
|
_zed_event_add_string_array(eid, zsp, prefix, nvp);
|
|
break;
|
|
case DATA_TYPE_NVLIST_ARRAY:
|
|
_zed_event_add_var(eid, zsp, prefix, name,
|
|
"%s", "_NOT_IMPLEMENTED_"); /* FIXME */
|
|
break;
|
|
default:
|
|
errno = EINVAL;
|
|
zed_log_msg(LOG_WARNING,
|
|
"Failed to convert nvpair \"%s\" for eid=%llu: "
|
|
"Unrecognized type=%u", name, eid, (unsigned int) type);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Restrict various environment variables to safe and sane values
|
|
* when constructing the environment for the child process, unless
|
|
* we're running with a custom $PATH (like under the ZFS test suite).
|
|
*
|
|
* Reference: Secure Programming Cookbook by Viega & Messier, Section 1.1.
|
|
*/
|
|
static void
|
|
_zed_event_add_env_restrict(uint64_t eid, zed_strings_t *zsp,
|
|
const char *path)
|
|
{
|
|
const char *env_restrict[][2] = {
|
|
{ "IFS", " \t\n" },
|
|
{ "PATH", _PATH_STDPATH },
|
|
{ "ZDB", SBINDIR "/zdb" },
|
|
{ "ZED", SBINDIR "/zed" },
|
|
{ "ZFS", SBINDIR "/zfs" },
|
|
{ "ZINJECT", SBINDIR "/zinject" },
|
|
{ "ZPOOL", SBINDIR "/zpool" },
|
|
{ "ZFS_ALIAS", ZFS_META_ALIAS },
|
|
{ "ZFS_VERSION", ZFS_META_VERSION },
|
|
{ "ZFS_RELEASE", ZFS_META_RELEASE },
|
|
{ NULL, NULL }
|
|
};
|
|
|
|
/*
|
|
* If we have a custom $PATH, use the default ZFS binary locations
|
|
* instead of the hard-coded ones.
|
|
*/
|
|
const char *env_path[][2] = {
|
|
{ "IFS", " \t\n" },
|
|
{ "PATH", NULL }, /* $PATH copied in later on */
|
|
{ "ZDB", "zdb" },
|
|
{ "ZED", "zed" },
|
|
{ "ZFS", "zfs" },
|
|
{ "ZINJECT", "zinject" },
|
|
{ "ZPOOL", "zpool" },
|
|
{ "ZFS_ALIAS", ZFS_META_ALIAS },
|
|
{ "ZFS_VERSION", ZFS_META_VERSION },
|
|
{ "ZFS_RELEASE", ZFS_META_RELEASE },
|
|
{ NULL, NULL }
|
|
};
|
|
const char *(*pa)[2];
|
|
|
|
assert(zsp != NULL);
|
|
|
|
pa = path != NULL ? env_path : env_restrict;
|
|
|
|
for (; *(*pa); pa++) {
|
|
/* Use our custom $PATH if we have one */
|
|
if (path != NULL && strcmp((*pa)[0], "PATH") == 0)
|
|
(*pa)[1] = path;
|
|
|
|
_zed_event_add_var(eid, zsp, NULL, (*pa)[0], "%s", (*pa)[1]);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Preserve specified variables from the parent environment
|
|
* when constructing the environment for the child process.
|
|
*
|
|
* Reference: Secure Programming Cookbook by Viega & Messier, Section 1.1.
|
|
*/
|
|
static void
|
|
_zed_event_add_env_preserve(uint64_t eid, zed_strings_t *zsp)
|
|
{
|
|
const char *env_preserve[] = {
|
|
"TZ",
|
|
NULL
|
|
};
|
|
const char **keyp;
|
|
const char *val;
|
|
|
|
assert(zsp != NULL);
|
|
|
|
for (keyp = env_preserve; *keyp; keyp++) {
|
|
if ((val = getenv(*keyp)))
|
|
_zed_event_add_var(eid, zsp, NULL, *keyp, "%s", val);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Compute the "subclass" by removing the first 3 components of [class]
|
|
* (which will always be of the form "*.fs.zfs"). Return a pointer inside
|
|
* the string [class], or NULL if insufficient components exist.
|
|
*/
|
|
static const char *
|
|
_zed_event_get_subclass(const char *class)
|
|
{
|
|
const char *p;
|
|
int i;
|
|
|
|
if (!class)
|
|
return (NULL);
|
|
|
|
p = class;
|
|
for (i = 0; i < 3; i++) {
|
|
p = strchr(p, '.');
|
|
if (!p)
|
|
break;
|
|
p++;
|
|
}
|
|
return (p);
|
|
}
|
|
|
|
/*
|
|
* Convert the zevent time from a 2-element array of 64b integers
|
|
* into a more convenient form:
|
|
* - TIME_SECS is the second component of the time.
|
|
* - TIME_NSECS is the nanosecond component of the time.
|
|
* - TIME_STRING is an almost-RFC3339-compliant string representation.
|
|
*/
|
|
static void
|
|
_zed_event_add_time_strings(uint64_t eid, zed_strings_t *zsp, int64_t etime[])
|
|
{
|
|
struct tm *stp;
|
|
char buf[32];
|
|
|
|
assert(zsp != NULL);
|
|
assert(etime != NULL);
|
|
|
|
_zed_event_add_var(eid, zsp, ZEVENT_VAR_PREFIX, "TIME_SECS",
|
|
"%lld", (long long int) etime[0]);
|
|
_zed_event_add_var(eid, zsp, ZEVENT_VAR_PREFIX, "TIME_NSECS",
|
|
"%lld", (long long int) etime[1]);
|
|
|
|
if (!(stp = localtime((const time_t *) &etime[0]))) {
|
|
zed_log_msg(LOG_WARNING, "Failed to add %s%s for eid=%llu: %s",
|
|
ZEVENT_VAR_PREFIX, "TIME_STRING", eid, "localtime error");
|
|
} else if (!strftime(buf, sizeof (buf), "%Y-%m-%d %H:%M:%S%z", stp)) {
|
|
zed_log_msg(LOG_WARNING, "Failed to add %s%s for eid=%llu: %s",
|
|
ZEVENT_VAR_PREFIX, "TIME_STRING", eid, "strftime error");
|
|
} else {
|
|
_zed_event_add_var(eid, zsp, ZEVENT_VAR_PREFIX, "TIME_STRING",
|
|
"%s", buf);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Service the next zevent, blocking until one is available.
|
|
*/
|
|
void
|
|
zed_event_service(struct zed_conf *zcp)
|
|
{
|
|
nvlist_t *nvl;
|
|
nvpair_t *nvp;
|
|
int n_dropped;
|
|
zed_strings_t *zsp;
|
|
uint64_t eid;
|
|
int64_t *etime;
|
|
uint_t nelem;
|
|
char *class;
|
|
const char *subclass;
|
|
int rv;
|
|
|
|
if (!zcp) {
|
|
errno = EINVAL;
|
|
zed_log_msg(LOG_ERR, "Failed to service zevent: %s",
|
|
strerror(errno));
|
|
return;
|
|
}
|
|
rv = zpool_events_next(zcp->zfs_hdl, &nvl, &n_dropped, ZEVENT_NONE,
|
|
zcp->zevent_fd);
|
|
|
|
if ((rv != 0) || !nvl)
|
|
return;
|
|
|
|
if (n_dropped > 0) {
|
|
zed_log_msg(LOG_WARNING, "Missed %d events", n_dropped);
|
|
/*
|
|
* FIXME: Increase max size of event nvlist in
|
|
* /sys/module/zfs/parameters/zfs_zevent_len_max ?
|
|
*/
|
|
}
|
|
if (nvlist_lookup_uint64(nvl, "eid", &eid) != 0) {
|
|
zed_log_msg(LOG_WARNING, "Failed to lookup zevent eid");
|
|
} else if (nvlist_lookup_int64_array(
|
|
nvl, "time", &etime, &nelem) != 0) {
|
|
zed_log_msg(LOG_WARNING,
|
|
"Failed to lookup zevent time (eid=%llu)", eid);
|
|
} else if (nelem != 2) {
|
|
zed_log_msg(LOG_WARNING,
|
|
"Failed to lookup zevent time (eid=%llu, nelem=%u)",
|
|
eid, nelem);
|
|
} else if (nvlist_lookup_string(nvl, "class", &class) != 0) {
|
|
zed_log_msg(LOG_WARNING,
|
|
"Failed to lookup zevent class (eid=%llu)", eid);
|
|
} else {
|
|
/* let internal modules see this event first */
|
|
zfs_agent_post_event(class, NULL, nvl);
|
|
|
|
zsp = zed_strings_create();
|
|
|
|
nvp = NULL;
|
|
while ((nvp = nvlist_next_nvpair(nvl, nvp)))
|
|
_zed_event_add_nvpair(eid, zsp, nvp);
|
|
|
|
_zed_event_add_env_restrict(eid, zsp, zcp->path);
|
|
_zed_event_add_env_preserve(eid, zsp);
|
|
|
|
_zed_event_add_var(eid, zsp, ZED_VAR_PREFIX, "PID",
|
|
"%d", (int)getpid());
|
|
_zed_event_add_var(eid, zsp, ZED_VAR_PREFIX, "ZEDLET_DIR",
|
|
"%s", zcp->zedlet_dir);
|
|
subclass = _zed_event_get_subclass(class);
|
|
_zed_event_add_var(eid, zsp, ZEVENT_VAR_PREFIX, "SUBCLASS",
|
|
"%s", (subclass ? subclass : class));
|
|
|
|
_zed_event_add_time_strings(eid, zsp, etime);
|
|
|
|
zed_exec_process(eid, class, subclass,
|
|
zcp->zedlet_dir, zcp->zedlets, zsp, zcp->zevent_fd);
|
|
|
|
zed_conf_write_state(zcp, eid, etime);
|
|
|
|
zed_strings_destroy(zsp);
|
|
}
|
|
nvlist_free(nvl);
|
|
}
|