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freebsd-dev/sbin/vinum/v.c
Tom Rhodes 3468b317cb more file system > filesystem
2002-05-16 04:10:46 +00:00

879 lines
26 KiB
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/* vinum.c: vinum interface program */
/*-
* Copyright (c) 1997, 1998
* Nan Yang Computer Services Limited. All rights reserved.
*
* Written by Greg Lehey
*
* This software is distributed under the so-called ``Berkeley
* License'':
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Nan Yang Computer
* Services Limited.
* 4. Neither the name of the Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* This software is provided ``as is'', and any express or implied
* warranties, including, but not limited to, the implied warranties of
* merchantability and fitness for a particular purpose are disclaimed.
* In no event shall the company or contributors be liable for any
* direct, indirect, incidental, special, exemplary, or consequential
* damages (including, but not limited to, procurement of substitute
* goods or services; loss of use, data, or profits; or business
* interruption) however caused and on any theory of liability, whether
* in contract, strict liability, or tort (including negligence or
* otherwise) arising in any way out of the use of this software, even if
* advised of the possibility of such damage.
*
* $Id: v.c,v 1.31 2000/09/03 01:29:26 grog Exp grog $
* $FreeBSD$
*/
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <netdb.h>
#include <paths.h>
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include "vext.h"
#include <sys/types.h>
#include <sys/wait.h>
#include <readline/history.h>
#include <readline/readline.h>
#include <sys/linker.h>
#include <sys/module.h>
#include <sys/resource.h>
#include <sys/sysctl.h>
FILE *cf; /* config file handle */
FILE *history; /* history file */
char *historyfile; /* and its name */
char *dateformat; /* format in which to store date */
char buffer[BUFSIZE]; /* buffer to read in to */
int line = 0; /* stdin line number for error messages */
int file_line = 0; /* and line in input file (yes, this is tacky) */
int inerror; /* set to 1 to exit after end of config file */
/* flags */
int debug = 0; /* debug flag, usage varies */
int force = 0; /* set to 1 to force some dangerous ops */
int interval = 0; /* interval in ms between init/revive */
int vflag = 0; /* set verbose operation or verify */
int Verbose = 0; /* set very verbose operation */
int recurse = 0; /* set recursion */
int sflag = 0; /* show statistics */
int SSize = 0; /* sector size for revive */
int dowait = 0; /* wait for completion */
char *objectname; /* name to be passed for -n flag */
/*
* Structures to read kernel data into. These are shortened versions
* of the kernel data structures, without the bits and pieces we
* shouldn't be using.
*/
struct __vinum_conf vinum_conf; /* configuration information */
struct _volume vol;
struct _plex plex;
struct _sd sd;
struct _drive drive;
jmp_buf command_fail; /* return on a failed command */
int superdev; /* vinum super device */
int no_devfs = 1; /* set if we have no devfs active */
void start_daemon(void);
#define ofs(x) ((void *) (& ((struct confdata *) 0)->x)) /* offset of x in struct confdata */
char *token[MAXARGS]; /* pointers to individual tokens */
int tokens; /* number of tokens */
int
main(int argc, char *argv[], char *envp[])
{
struct stat histstat;
if (modfind(VINUMMOD) < 0) {
/* need to load the vinum module */
if (kldload(VINUMMOD) < 0 || modfind(VINUMMOD) < 0) {
perror(VINUMMOD ": Kernel module not available");
return 1;
}
}
dateformat = getenv("VINUM_DATEFORMAT");
if (dateformat == NULL)
dateformat = "%e %b %Y %H:%M:%S";
historyfile = getenv("VINUM_HISTORY");
if (historyfile == NULL)
historyfile = DEFAULT_HISTORYFILE;
if (stat(historyfile, &histstat) == 0) { /* history file exists */
if ((histstat.st_mode & S_IFMT) != S_IFREG) {
fprintf(stderr,
"Vinum history file %s must be a regular file\n",
historyfile);
exit(1);
}
} else if ((errno != ENOENT) /* not "not there", */
&&(errno != EROFS)) { /* and not read-only filesystem */
fprintf(stderr,
"Can't open %s: %s (%d)\n",
historyfile,
strerror(errno),
errno);
exit(1);
}
history = fopen(historyfile, "a+");
if (history != NULL) {
timestamp();
fprintf(history, "*** " VINUMMOD " started ***\n");
fflush(history); /* before we start the daemon */
}
if (sysctlbyname("vfs.devfs.generation", NULL, NULL, NULL, 0) == 0)
no_devfs = 0;
superdev = open(VINUM_SUPERDEV_NAME, O_RDWR); /* open vinum superdevice */
if (superdev < 0) { /* no go */
if ((errno == ENOENT) && no_devfs) /* we don't have our node, */
make_devices(); /* create them first */
if (superdev < 0) {
perror("Can't open " VINUM_SUPERDEV_NAME);
return 1;
}
}
/*
* Check that we match the kernel version. There are a number of
* possibilities here:
*
* 0: The versions are OK.
* 1: The kernel module could be a pre-version 1 module, which
* doesn't include this check. In that case, vinum_conf will be too
* short, and so we'll get an EINVAL back when trying to get it. In
* this case we'll fake a 0 in the version.
* 2: The module versions are different. Print appropriate messages
* and die.
*/
if (ioctl(superdev, VINUM_GETCONFIG, &vinum_conf) < 0) {
if (errno == EINVAL) /* wrong length, */
vinum_conf.version = 0; /* must be the old version */
else {
perror("Can't get vinum config");
return 1;
}
}
if (vinum_conf.version != VINUMVERSION) {
fprintf(stderr,
"Version mismatch. The kernel module is version %d of Vinum,\n"
"but this program is designed for version %d\n",
vinum_conf.version,
VINUMVERSION);
if (vinum_conf.version < VINUMVERSION)
fprintf(stderr, "Please upgrade your kernel module.\n");
else
fprintf(stderr, "Please upgrade vinum(8).\n");
return 1;
}
/* Check if the d<>mon is running. If not, start it in the
* background */
start_daemon();
if (argc > 1) { /* we have a command on the line */
if (setjmp(command_fail) != 0) /* long jumped out */
return -1;
parseline(argc - 1, &argv[1]); /* do it */
} else {
/*
* Catch a possible race condition which could cause us to
* longjmp() into nowhere if we receive a SIGINT in the next few
* lines.
*/
if (setjmp(command_fail)) /* come back here on catastrophic failure */
return 1;
setsigs(); /* set signal handler */
for (;;) { /* ugh */
char *c;
int childstatus; /* from wait4 */
if (setjmp(command_fail) == 2) /* come back here on catastrophic failure */
fprintf(stderr, "*** interrupted ***\n"); /* interrupted */
while (wait4(-1, &childstatus, WNOHANG, NULL) > 0); /* wait for all dead children */
c = readline(VINUMMOD " -> "); /* get an input */
if (c == NULL) { /* EOF or error */
if (ferror(stdin)) {
fprintf(stderr, "Can't read input: %s (%d)\n", strerror(errno), errno);
return 1;
} else { /* EOF */
printf("\n");
return 0;
}
} else if (*c) { /* got something there */
add_history(c); /* save it in the history */
strcpy(buffer, c); /* put it where we can munge it */
free(c);
line++; /* count the lines */
tokens = tokenize(buffer, token, MAXARGS);
/* got something potentially worth parsing */
if (tokens)
parseline(tokens, token); /* and do what he says */
}
if (history)
fflush(history);
}
}
return 0; /* normal completion */
}
/* stop the hard way */
void
vinum_quit(int argc, char *argv[], char *argv0[])
{
exit(0);
}
/* Set action on receiving a SIGINT */
void
setsigs()
{
struct sigaction act;
act.sa_handler = catchsig;
act.sa_flags = 0;
sigemptyset(&act.sa_mask);
sigaction(SIGINT, &act, NULL);
}
void
catchsig(int ignore)
{
longjmp(command_fail, 2);
}
#define FUNKEY(x) { kw_##x, &vinum_##x } /* create pair "kw_foo", vinum_foo */
#define vinum_move vinum_mv /* synonym for 'mv' */
struct funkey {
enum keyword kw;
void (*fun) (int argc, char *argv[], char *arg0[]);
} funkeys[] = {
FUNKEY(create),
FUNKEY(read),
FUNKEY(debug),
FUNKEY(modify),
FUNKEY(list),
FUNKEY(ld),
FUNKEY(ls),
FUNKEY(lp),
FUNKEY(lv),
FUNKEY(info),
FUNKEY(set),
FUNKEY(init),
FUNKEY(label),
FUNKEY(resetconfig),
FUNKEY(rm),
FUNKEY(mv),
FUNKEY(move),
FUNKEY(attach),
FUNKEY(detach),
FUNKEY(rename),
FUNKEY(replace),
FUNKEY(printconfig),
FUNKEY(saveconfig),
FUNKEY(start),
FUNKEY(stop),
FUNKEY(makedev),
FUNKEY(help),
FUNKEY(quit),
FUNKEY(concat),
FUNKEY(stripe),
FUNKEY(raid4),
FUNKEY(raid5),
FUNKEY(mirror),
FUNKEY(setdaemon),
FUNKEY(readpol),
FUNKEY(resetstats),
FUNKEY(setstate),
FUNKEY(checkparity),
FUNKEY(rebuildparity),
FUNKEY(dumpconfig)
};
/* Take args arguments at argv and attempt to perform the operation specified */
void
parseline(int args, char *argv[])
{
int i;
int j;
enum keyword command; /* command to execute */
if (history != NULL) { /* save the command to history file */
timestamp();
for (i = 0; i < args; i++) /* all args */
fprintf(history, "%s ", argv[i]);
fputs("\n", history);
}
if ((args == 0) /* empty line */
||(*argv[0] == '#')) /* or a comment, */
return;
if (args == MAXARGS) { /* too many arguments, */
fprintf(stderr, "Too many arguments to %s, this can't be right\n", argv[0]);
return;
}
command = get_keyword(argv[0], &keyword_set);
dowait = 0; /* initialize flags */
force = 0; /* initialize flags */
vflag = 0; /* initialize flags */
Verbose = 0; /* initialize flags */
recurse = 0; /* initialize flags */
sflag = 0; /* initialize flags */
objectname = NULL; /* no name yet */
/*
* first handle generic options
* We don't use getopt(3) because
* getopt doesn't allow merging flags
* (for example, -fr).
*/
for (i = 1; (i < args) && (argv[i][0] == '-'); i++) { /* while we have flags */
for (j = 1; j < strlen(argv[i]); j++)
switch (argv[i][j]) {
case 'd': /* -d: debug */
debug = 1;
break;
case 'f': /* -f: force */
force = 1;
break;
case 'i': /* interval */
interval = 0;
if (argv[i][j + 1] != '\0') /* operand follows, */
interval = atoi(&argv[i][j + 1]); /* use it */
else if (args > (i + 1)) /* another following, */
interval = atoi(argv[++i]); /* use it */
if (interval == 0) /* nothing valid, */
fprintf(stderr, "-i: no interval specified\n");
break;
case 'n': /* -n: get name */
if (i == args - 1) { /* last arg */
fprintf(stderr, "-n requires a name parameter\n");
return;
}
objectname = argv[++i]; /* pick it up */
j = strlen(argv[i]); /* skip the next parm */
break;
case 'r': /* -r: recurse */
recurse = 1;
break;
case 's': /* -s: show statistics */
sflag = 1;
break;
case 'S':
SSize = 0;
if (argv[i][j + 1] != '\0') /* operand follows, */
SSize = atoi(&argv[i][j + 1]); /* use it */
else if (args > (i + 1)) /* another following, */
SSize = atoi(argv[++i]); /* use it */
if (SSize == 0) /* nothing valid, */
fprintf(stderr, "-S: no size specified\n");
break;
case 'v': /* -v: verbose */
vflag++;
break;
case 'V': /* -V: Very verbose */
vflag++;
Verbose++;
break;
case 'w': /* -w: wait for completion */
dowait = 1;
break;
default:
fprintf(stderr, "Invalid flag: %s\n", argv[i]);
}
}
/* Pass what we have left to the command to handle it */
for (j = 0; j < (sizeof(funkeys) / sizeof(struct funkey)); j++) {
if (funkeys[j].kw == command) { /* found the command */
funkeys[j].fun(args - i, &argv[i], &argv[0]);
return;
}
}
fprintf(stderr, "Unknown command: %s\n", argv[0]);
}
void
get_drive_info(struct _drive *drive, int index)
{
*(int *) drive = index; /* put in drive to hand to driver */
if (ioctl(superdev, VINUM_DRIVECONFIG, drive) < 0) {
fprintf(stderr,
"Can't get config for drive %d: %s\n",
index,
strerror(errno));
longjmp(command_fail, -1);
}
}
void
get_sd_info(struct _sd *sd, int index)
{
*(int *) sd = index; /* put in sd to hand to driver */
if (ioctl(superdev, VINUM_SDCONFIG, sd) < 0) {
fprintf(stderr,
"Can't get config for subdisk %d: %s\n",
index,
strerror(errno));
longjmp(command_fail, -1);
}
}
/* Get the contents of the sd entry for subdisk <sdno>
* of the specified plex. */
void
get_plex_sd_info(struct _sd *sd, int plexno, int sdno)
{
((int *) sd)[0] = plexno;
((int *) sd)[1] = sdno; /* pass parameters */
if (ioctl(superdev, VINUM_PLEXSDCONFIG, sd) < 0) {
fprintf(stderr,
"Can't get config for subdisk %d (part of plex %d): %s\n",
sdno,
plexno,
strerror(errno));
longjmp(command_fail, -1);
}
}
void
get_plex_info(struct _plex *plex, int index)
{
*(int *) plex = index; /* put in plex to hand to driver */
if (ioctl(superdev, VINUM_PLEXCONFIG, plex) < 0) {
fprintf(stderr,
"Can't get config for plex %d: %s\n",
index,
strerror(errno));
longjmp(command_fail, -1);
}
}
void
get_volume_info(struct _volume *volume, int index)
{
*(int *) volume = index; /* put in volume to hand to driver */
if (ioctl(superdev, VINUM_VOLCONFIG, volume) < 0) {
fprintf(stderr,
"Can't get config for volume %d: %s\n",
index,
strerror(errno));
longjmp(command_fail, -1);
}
}
struct _drive *
find_drive_by_devname(char *name)
{
int driveno;
if (ioctl(superdev, VINUM_GETCONFIG, &vinum_conf) < 0) {
perror("Can't get vinum config");
return NULL;
}
for (driveno = 0; driveno < vinum_conf.drives_allocated; driveno++) {
get_drive_info(&drive, driveno);
if ((drive.state != drive_unallocated) /* real drive */
&&(!strcmp(drive.devicename, name))) /* and the name's right, */
return &drive; /* found it */
}
return NULL; /* no drive of that name */
}
/* Create the device nodes for vinum objects */
void
make_devices(void)
{
int volno;
int plexno;
int sdno;
int driveno;
if (access(_PATH_DEV, W_OK) < 0) { /* can't access /dev to write? */
if (errno == EROFS) /* because it's read-only, */
fprintf(stderr, VINUMMOD ": " _PATH_DEV
" is mounted read-only, not rebuilding " VINUM_DIR "\n");
else
perror(VINUMMOD ": Can't write to " _PATH_DEV);
return;
}
if (history) {
timestamp();
fprintf(history, "*** Created devices ***\n");
}
if (superdev >= 0) /* super device open */
close(superdev);
system("rm -rf " VINUM_DIR); /* remove the old directories */
system("mkdir -p " VINUM_DIR "/drive " /* and make them again */
VINUM_DIR "/plex "
VINUM_DIR "/sd "
VINUM_DIR "/vol");
if (mknod(VINUM_SUPERDEV_NAME,
S_IRUSR | S_IWUSR | S_IFCHR, /* user only */
makedev(VINUM_CDEV_MAJOR, VINUM_SUPERDEV)) < 0)
fprintf(stderr, "Can't create %s: %s\n", VINUM_SUPERDEV_NAME, strerror(errno));
superdev = open(VINUM_SUPERDEV_NAME, O_RDWR); /* open the super device */
if (superdev < 0) {
perror(VINUM_SUPERDEV_NAME);
return;
}
if (mknod(VINUM_DAEMON_DEV_NAME, /* daemon super device */
S_IRUSR | S_IWUSR | S_IFCHR, /* user only */
makedev(VINUM_CDEV_MAJOR, VINUM_DAEMON_DEV)) < 0)
fprintf(stderr, "Can't create %s: %s\n", VINUM_DAEMON_DEV_NAME, strerror(errno));
if (ioctl(superdev, VINUM_GETCONFIG, &vinum_conf) < 0) {
perror("Can't get vinum config");
return;
}
for (volno = 0; volno < vinum_conf.volumes_allocated; volno++)
make_vol_dev(volno, 0);
for (plexno = 0; plexno < vinum_conf.plexes_allocated; plexno++)
make_plex_dev(plexno, 0);
for (sdno = 0; sdno < vinum_conf.subdisks_allocated; sdno++)
make_sd_dev(sdno);
/* Drives. Do this later (both logical and physical names) XXX */
for (driveno = 0; driveno < vinum_conf.drives_allocated; driveno++) {
char filename[PATH_MAX]; /* for forming file names */
get_drive_info(&drive, driveno);
if (drive.state > drive_referenced) {
sprintf(filename, "ln -s %s " VINUM_DIR "/drive/%s", drive.devicename, drive.label.name);
system(filename);
}
}
}
/* make the devices for a volume */
void
make_vol_dev(int volno, int recurse)
{
dev_t voldev;
char filename[PATH_MAX]; /* for forming file names */
int plexno;
get_volume_info(&vol, volno);
if (vol.state != volume_unallocated) { /* we could have holes in our lists */
voldev = VINUMDEV(volno, 0, 0, VINUM_VOLUME_TYPE); /* create a device number */
/* Create /dev/vinum/<myvol> */
sprintf(filename, VINUM_DIR "/%s", vol.name);
if (mknod(filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR, voldev) < 0)
fprintf(stderr, "Can't create %s: %s\n", filename, strerror(errno));
/* Create /dev/vinum/vol/<myvol> */
sprintf(filename, VINUM_DIR "/vol/%s", vol.name);
if (mknod(filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR, voldev) < 0)
fprintf(stderr, "Can't create %s: %s\n", filename, strerror(errno));
if (vol.plexes > 0) {
/* Create /dev/vinum/vol/<myvol>.plex/ */
sprintf(filename, VINUM_DIR "/vol/%s.plex", vol.name);
if (mkdir(filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IXOTH) < 0)
fprintf(stderr, "Can't create %s: %s\n", filename, strerror(errno));
}
if (recurse)
for (plexno = 0; plexno < vol.plexes; plexno++)
make_plex_dev(plex.plexno, recurse);
}
}
/*
* Create device entries for the plexes in
* /dev/vinum/<vol>.plex/ and /dev/vinum/plex.
*/
void
make_plex_dev(int plexno, int recurse)
{
dev_t plexdev; /* device */
char filename[PATH_MAX]; /* for forming file names */
int sdno;
get_plex_info(&plex, plexno);
if (plex.state != plex_unallocated) {
plexdev = VINUM_PLEX(plexno);
/* /dev/vinum/plex/<plex> */
sprintf(filename, VINUM_DIR "/plex/%s", plex.name);
if (mknod(filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR, plexdev) < 0)
fprintf(stderr, "Can't create %s: %s\n", filename, strerror(errno));
if (plex.volno >= 0) {
get_volume_info(&vol, plex.volno);
plexdev = VINUMDEV(plex.volno, plexno, 0, VINUM_PLEX_TYPE);
/* Create device /dev/vinum/vol/<vol>.plex/<plex> */
sprintf(filename, VINUM_DIR "/vol/%s.plex/%s", vol.name, plex.name);
if (mknod(filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR, plexdev) < 0)
fprintf(stderr, "Can't create %s: %s\n", filename, strerror(errno));
/* Create directory /dev/vinum/vol/<vol>.plex/<plex>.sd */
sprintf(filename, VINUM_DIR "/vol/%s.plex/%s.sd", vol.name, plex.name);
if (mkdir(filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IXOTH) < 0)
fprintf(stderr, "Can't create %s: %s\n", filename, strerror(errno));
}
if (recurse) {
for (sdno = 0; sdno < plex.subdisks; sdno++) {
get_plex_sd_info(&sd, plex.plexno, sdno);
make_sd_dev(sd.sdno);
}
}
}
}
/* Create the contents of /dev/vinum/sd and /dev/vinum/rsd */
void
make_sd_dev(int sdno)
{
dev_t sddev; /* device */
char filename[PATH_MAX]; /* for forming file names */
get_sd_info(&sd, sdno);
if (sd.state != sd_unallocated) {
sddev = VINUM_SD(sdno);
/* /dev/vinum/sd/<sd> */
sprintf(filename, VINUM_DIR "/sd/%s", sd.name);
if (mknod(filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR, sddev) < 0)
fprintf(stderr, "Can't create %s: %s\n", filename, strerror(errno));
}
}
/* command line interface for the 'makedev' command */
void
vinum_makedev(int argc, char *argv[], char *arg0[])
{
if (no_devfs)
make_devices();
else
fprintf(stderr, "makedev is not needed for a DEVFS-based system\n");
}
/*
* Find the object "name". Return object type at type,
* and the index as the return value.
* If not found, return -1 and invalid_object.
*/
int
find_object(const char *name, enum objecttype *type)
{
int object;
if (ioctl(superdev, VINUM_GETCONFIG, &vinum_conf) < 0) {
perror("Can't get vinum config");
*type = invalid_object;
return -1;
}
/* Search the drive table */
for (object = 0; object < vinum_conf.drives_allocated; object++) {
get_drive_info(&drive, object);
if (strcmp(name, drive.label.name) == 0) {
*type = drive_object;
return object;
}
}
/* Search the subdisk table */
for (object = 0; object < vinum_conf.subdisks_allocated; object++) {
get_sd_info(&sd, object);
if (strcmp(name, sd.name) == 0) {
*type = sd_object;
return object;
}
}
/* Search the plex table */
for (object = 0; object < vinum_conf.plexes_allocated; object++) {
get_plex_info(&plex, object);
if (strcmp(name, plex.name) == 0) {
*type = plex_object;
return object;
}
}
/* Search the volume table */
for (object = 0; object < vinum_conf.volumes_allocated; object++) {
get_volume_info(&vol, object);
if (strcmp(name, vol.name) == 0) {
*type = volume_object;
return object;
}
}
/* Didn't find the name: invalid */
*type = invalid_object;
return -1;
}
/* Continue reviving a subdisk in the background */
void
continue_revive(int sdno)
{
struct _sd sd;
pid_t pid;
get_sd_info(&sd, sdno);
if (dowait == 0)
pid = fork(); /* do this in the background */
else
pid = 0;
if (pid == 0) { /* we're the child */
struct _ioctl_reply reply;
struct vinum_ioctl_msg *message = (struct vinum_ioctl_msg *) &reply;
openlog(VINUMMOD, LOG_CONS | LOG_PERROR | LOG_PID, LOG_KERN);
syslog(LOG_INFO | LOG_KERN, "reviving %s", sd.name);
setproctitle("reviving %s", sd.name);
for (reply.error = EAGAIN; reply.error == EAGAIN;) { /* revive the subdisk */
if (interval)
usleep(interval * 1000); /* pause between each copy */
message->index = sdno; /* pass sd number */
message->type = sd_object; /* and type of object */
message->state = object_up;
if (SSize != 0) { /* specified a size for init */
if (SSize < 512)
SSize <<= DEV_BSHIFT;
message->blocksize = SSize;
} else
message->blocksize = DEFAULT_REVIVE_BLOCKSIZE;
ioctl(superdev, VINUM_SETSTATE, message);
}
if (reply.error) {
syslog(LOG_ERR | LOG_KERN,
"can't revive %s: %s",
sd.name,
reply.msg[0] ? reply.msg : strerror(reply.error));
if (dowait == 0)
exit(1);
} else {
get_sd_info(&sd, sdno); /* update the info */
syslog(LOG_INFO | LOG_KERN, "%s is %s", sd.name, sd_state(sd.state));
if (dowait == 0)
exit(0);
}
} else if (pid < 0) /* couldn't fork? */
fprintf(stderr, "Can't continue reviving %s: %s\n", sd.name, strerror(errno));
else /* parent */
printf("Reviving %s in the background\n", sd.name);
}
/*
* Check if the daemon is running,
* start it if it isn't. The check itself
* could take a while, so we do it as a separate
* process, which will become the daemon if one isn't
* running already
*/
void
start_daemon(void)
{
int pid;
int status;
int error;
pid = (int) fork();
if (pid == 0) { /* We're the child, do the work */
/*
* We have a problem when stopping the subsystem:
* The only way to know that we're idle is when
* all open superdevs close. But we want the
* daemon to clean up for us, and since we can't
* count the opens, we need to have the main device
* closed when we stop. We solve this conundrum
* by getting the daemon to open a separate device.
*/
close(superdev); /* this is the wrong device */
superdev = open(VINUM_DAEMON_DEV_NAME, O_RDWR); /* open deamon superdevice */
if (superdev < 0) {
perror("Can't open " VINUM_DAEMON_DEV_NAME);
exit(1);
}
error = daemon(0, 0); /* this will fork again, but who's counting? */
if (error != 0) {
fprintf(stderr, "Can't start daemon: %s (%d)\n", strerror(errno), errno);
exit(1);
}
setproctitle(VINUMMOD " daemon"); /* show what we're doing */
status = ioctl(superdev, VINUM_FINDDAEMON, NULL);
if (status != 0) { /* no daemon, */
ioctl(superdev, VINUM_DAEMON, &vflag); /* we should hang here */
syslog(LOG_ERR | LOG_KERN, "%s", strerror(errno));
exit(1);
}
exit(0); /* when told to die */
} else if (pid < 0) /* couldn't fork */
printf("Can't fork to check daemon\n");
}
void
timestamp()
{
struct timeval now;
struct tm *date;
char datetext[MAXDATETEXT];
time_t sec;
if (history != NULL) {
if (gettimeofday(&now, NULL) != 0) {
fprintf(stderr, "Can't get time: %s\n", strerror(errno));
return;
}
sec = now.tv_sec;
date = localtime(&sec);
strftime(datetext, MAXDATETEXT, dateformat, date),
fprintf(history,
"%s.%06ld ",
datetext,
now.tv_usec);
}
}
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