#include <fcntl.h>
#include <signal.h>
#include <dirent.h>
-
+#ifdef USE_PTHREADS
+#include <pthread.h>
+#else
#include <sched.h>
+#endif
#include "mdadm.h"
#include "mdmon.h"
int sigterm;
-int run_child(void *v)
+#ifdef USE_PTHREADS
+static void *run_child(void *v)
+{
+ struct supertype *c = v;
+
+ mon_tid = syscall(SYS_gettid);
+ do_monitor(c);
+ return 0;
+}
+
+static int clone_monitor(struct supertype *container)
+{
+ pthread_attr_t attr;
+ pthread_t thread;
+ int rc;
+
+ mon_tid = -1;
+ pthread_attr_init(&attr);
+ pthread_attr_setstacksize(&attr, 4096);
+ pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+ rc = pthread_create(&thread, &attr, run_child, container);
+ if (rc)
+ return rc;
+ while (mon_tid == -1)
+ usleep(10);
+ pthread_attr_destroy(&attr);
+
+ mgr_tid = syscall(SYS_gettid);
+
+ return mon_tid;
+}
+#else /* USE_PTHREADS */
+static int run_child(void *v)
{
struct supertype *c = v;
int flags, void *arg, ...
/* pid_t *pid, struct user_desc *tls, pid_t *ctid */ );
#endif
- int clone_monitor(struct supertype *container)
+static int clone_monitor(struct supertype *container)
{
static char stack[4096];
return mon_tid;
}
-
-static struct superswitch *find_metadata_methods(char *vers)
-{
- if (strcmp(vers, "ddf") == 0)
- return &super_ddf;
- if (strcmp(vers, "imsm") == 0)
- return &super_imsm;
- return NULL;
-}
+#endif /* USE_PTHREADS */
static int make_pidfile(char *devname)
{
int fd;
int n;
- if (mkdir(pid_dir, 0600) < 0 &&
+ if (mkdir(MDMON_DIR, 0755) < 0 &&
errno != EEXIST)
return -errno;
- sprintf(path, "%s/%s.pid", pid_dir, devname);
+ sprintf(path, "%s/%s.pid", MDMON_DIR, devname);
fd = open(path, O_RDWR|O_CREAT|O_EXCL, 0600);
if (fd < 0)
return 0;
}
-int is_container_member(struct mdstat_ent *mdstat, char *container)
-{
- if (mdstat->metadata_version == NULL ||
- strncmp(mdstat->metadata_version, "external:", 9) != 0 ||
- !is_subarray(mdstat->metadata_version+9) ||
- strncmp(mdstat->metadata_version+10, container, strlen(container)) != 0 ||
- mdstat->metadata_version[10+strlen(container)] != '/')
- return 0;
-
- return 1;
-}
-
static void try_kill_monitor(pid_t pid, char *devname, int sock)
{
char buf[100];
buf[sizeof(buf)-1] = 0;
close(fd);
- if (n < 0 || !strstr(buf, "mdmon"))
+ if (n < 0 || !(strstr(buf, "mdmon") ||
+ strstr(buf, "@dmon")))
return;
kill(pid, SIGTERM);
+ if (sock < 0)
+ return;
+
/* Wait for monitor to exit by reading from the socket, after
* clearing the non-blocking flag */
fl = fcntl(sock, F_GETFL, 0);
fcntl(sock, F_SETFL, fl);
n = read(sock, buf, 100);
/* Ignore result, it is just the wait that
- * matters
+ * matters
*/
}
{
char buf[100];
- sprintf(buf, "%s/%s.pid", pid_dir, devname);
+ sprintf(buf, "%s/%s.pid", MDMON_DIR, devname);
unlink(buf);
- sprintf(buf, "%s/%s.sock", pid_dir, devname);
+ sprintf(buf, "%s/%s.sock", MDMON_DIR, devname);
unlink(buf);
- if (strcmp(pid_dir, ALT_RUN) == 0)
- /* try to clean up when we are finished with this dir */
- rmdir(pid_dir);
}
static int make_control_sock(char *devname)
if (sigterm)
return -1;
- sprintf(path, "%s/%s.sock", pid_dir, devname);
+ sprintf(path, "%s/%s.sock", MDMON_DIR, devname);
unlink(path);
sfd = socket(PF_LOCAL, SOCK_STREAM, 0);
if (sfd < 0)
void usage(void)
{
- fprintf(stderr, "Usage: mdmon [--all] [--takeover] CONTAINER\n");
+ fprintf(stderr,
+"Usage: mdmon [options] CONTAINER\n"
+"\n"
+"Options are:\n"
+" --help -h : This message\n"
+" --all -a : All devices\n"
+" --foreground -F : Run in foreground (do not fork)\n"
+" --takeover -t : Takeover container\n"
+);
exit(2);
}
-static int mdmon(char *devname, int devnum, int must_fork, int takeover);
+static int mdmon(char *devnm, int must_fork, int takeover);
int main(int argc, char *argv[])
{
char *container_name = NULL;
- int devnum;
- char *devname;
+ char *devnm = NULL;
int status = 0;
- int arg;
+ int opt;
int all = 0;
int takeover = 0;
+ int dofork = 1;
+ static struct option options[] = {
+ {"all", 0, NULL, 'a'},
+ {"takeover", 0, NULL, 't'},
+ {"help", 0, NULL, 'h'},
+ {"offroot", 0, NULL, OffRootOpt},
+ {"foreground", 0, NULL, 'F'},
+ {NULL, 0, NULL, 0}
+ };
+
+ if (in_initrd()) {
+ /*
+ * set first char of argv[0] to @. This is used by
+ * systemd to signal that the task was launched from
+ * initrd/initramfs and should be preserved during shutdown
+ */
+ argv[0][0] = '@';
+ }
- for (arg = 1; arg < argc; arg++) {
- if (strncmp(argv[arg], "--all",5) == 0 ||
- strcmp(argv[arg], "/proc/mdstat") == 0) {
- container_name = argv[arg];
+ while ((opt = getopt_long(argc, argv, "thaF", options, NULL)) != -1) {
+ switch (opt) {
+ case 'a':
+ container_name = argv[optind-1];
all = 1;
- } else if (strcmp(argv[arg], "--takeover") == 0)
+ break;
+ case 't':
takeover = 1;
- else if (container_name == NULL)
- container_name = argv[arg];
- else
+ break;
+ case 'F':
+ dofork = 0;
+ break;
+ case OffRootOpt:
+ argv[0][0] = '@';
+ break;
+ case 'h':
+ default:
usage();
+ break;
+ }
}
+
+ if (all == 0 && container_name == NULL) {
+ if (argv[optind])
+ container_name = argv[optind];
+ }
+
if (container_name == NULL)
usage();
+ if (argc - optind > 1)
+ usage();
+
+ if (strcmp(container_name, "/proc/mdstat") == 0)
+ all = 1;
+
if (all) {
struct mdstat_ent *mdstat, *e;
int container_len = strlen(container_name);
/* launch an mdmon instance for each container found */
mdstat = mdstat_read(0, 0);
for (e = mdstat; e; e = e->next) {
- if (strncmp(e->metadata_version, "external:", 9) == 0 &&
+ if (e->metadata_version &&
+ strncmp(e->metadata_version, "external:", 9) == 0 &&
!is_subarray(&e->metadata_version[9])) {
- devname = devnum2devname(e->devnum);
/* update cmdline so this mdmon instance can be
* distinguished from others in a call to ps(1)
*/
- if (strlen(devname) <= container_len) {
+ if (strlen(e->devnm) <= (unsigned)container_len) {
memset(container_name, 0, container_len);
- sprintf(container_name, "%s", devname);
+ sprintf(container_name, "%s", e->devnm);
}
- status |= mdmon(devname, e->devnum, 1,
- takeover);
+ status |= mdmon(e->devnm, 1, takeover);
}
}
free_mdstat(mdstat);
return status;
} else if (strncmp(container_name, "md", 2) == 0) {
- devnum = devname2devnum(container_name);
- devname = devnum2devname(devnum);
- if (strcmp(container_name, devname) != 0)
- devname = NULL;
+ int id = devnm2devid(container_name);
+ if (id)
+ devnm = container_name;
} else {
struct stat st;
- devnum = NoMdDev;
if (stat(container_name, &st) == 0)
- devnum = stat2devnum(&st);
- if (devnum == NoMdDev)
- devname = NULL;
- else
- devname = devnum2devname(devnum);
+ devnm = xstrdup(stat2devnm(&st));
}
- if (!devname) {
- fprintf(stderr, "mdmon: %s is not a valid md device name\n",
+ if (!devnm) {
+ pr_err("%s is not a valid md device name\n",
container_name);
exit(1);
}
- return mdmon(devname, devnum, do_fork(), takeover);
+ return mdmon(devnm, dofork && do_fork(), takeover);
}
-static int mdmon(char *devname, int devnum, int must_fork, int takeover)
+static int mdmon(char *devnm, int must_fork, int takeover)
{
int mdfd;
struct mdinfo *mdi, *di;
pid_t victim = -1;
int victim_sock = -1;
- dprintf("starting mdmon for %s\n", devname);
+ dprintf("starting mdmon for %s\n", devnm);
- mdfd = open_dev(devnum);
+ mdfd = open_dev(devnm);
if (mdfd < 0) {
- fprintf(stderr, "mdmon: %s: %s\n", devname,
- strerror(errno));
+ pr_err("%s: %s\n", devnm, strerror(errno));
return 1;
}
if (md_get_version(mdfd) < 0) {
- fprintf(stderr, "mdmon: %s: Not an md device\n",
- devname);
+ pr_err("%s: Not an md device\n", devnm);
return 1;
}
/* Fork, and have the child tell us when they are ready */
if (must_fork) {
if (pipe(pfd) != 0) {
- fprintf(stderr, "mdmon: failed to create pipe\n");
+ pr_err("failed to create pipe\n");
return 1;
}
switch(fork()) {
case -1:
- fprintf(stderr, "mdmon: failed to fork: %s\n",
- strerror(errno));
+ pr_err("failed to fork: %s\n", strerror(errno));
return 1;
case 0: /* child */
close(pfd[0]);
wait(&status);
status = WEXITSTATUS(status);
}
+ close(pfd[0]);
return status;
}
} else
pfd[0] = pfd[1] = -1;
- container = calloc(1, sizeof(*container));
- container->devnum = devnum;
- container->devname = devname;
+ container = xcalloc(1, sizeof(*container));
+ strcpy(container->devnm, devnm);
container->arrays = NULL;
- container->subarray[0] = 0;
container->sock = -1;
- if (!container->devname) {
- fprintf(stderr, "mdmon: failed to allocate container name string\n");
- exit(3);
- }
-
- mdi = sysfs_read(mdfd, container->devnum,
- GET_VERSION|GET_LEVEL|GET_DEVS|SKIP_GONE_DEVS);
+ mdi = sysfs_read(mdfd, container->devnm, GET_VERSION|GET_LEVEL|GET_DEVS);
if (!mdi) {
- fprintf(stderr, "mdmon: failed to load sysfs info for %s\n",
- container->devname);
+ pr_err("failed to load sysfs info for %s\n", container->devnm);
exit(3);
}
if (mdi->array.level != UnSet) {
- fprintf(stderr, "mdmon: %s is not a container - cannot monitor\n",
- devname);
+ pr_err("%s is not a container - cannot monitor\n", devnm);
exit(3);
}
if (mdi->array.major_version != -1 ||
mdi->array.minor_version != -2) {
- fprintf(stderr, "mdmon: %s does not use external metadata - cannot monitor\n",
- devname);
+ pr_err("%s does not use external metadata - cannot monitor\n",
+ devnm);
exit(3);
}
- container->ss = find_metadata_methods(mdi->text_version);
+ container->ss = version_to_superswitch(mdi->text_version);
if (container->ss == NULL) {
- fprintf(stderr, "mdmon: %s uses unknown metadata: %s\n",
- devname, mdi->text_version);
+ pr_err("%s uses unsupported metadata: %s\n",
+ devnm, mdi->text_version);
exit(3);
}
container->devs = NULL;
for (di = mdi->devs; di; di = di->next) {
- struct mdinfo *cd = malloc(sizeof(*cd));
+ struct mdinfo *cd = xmalloc(sizeof(*cd));
*cd = *di;
cd->next = container->devs;
container->devs = cd;
act.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &act, NULL);
- pid_dir = VAR_RUN;
- victim = mdmon_pid(container->devnum);
- if (victim < 0) {
- pid_dir = ALT_RUN;
- victim = mdmon_pid(container->devnum);
- }
+ victim = mdmon_pid(container->devnm);
if (victim >= 0)
- victim_sock = connect_monitor(container->devname);
+ victim_sock = connect_monitor(container->devnm);
ignore = chdir("/");
if (!takeover && victim > 0 && victim_sock >= 0) {
if (fping_monitor(victim_sock) == 0) {
- fprintf(stderr, "mdmon: %s already managed\n",
- container->devname);
+ pr_err("%s already managed\n", container->devnm);
exit(3);
}
close(victim_sock);
+ victim_sock = -1;
}
- if (container->ss->load_super(container, mdfd, devname)) {
- fprintf(stderr, "mdmon: Cannot load metadata for %s\n",
- devname);
+ if (container->ss->load_container(container, mdfd, devnm)) {
+ pr_err("Cannot load metadata for %s\n", devnm);
exit(3);
}
close(mdfd);
/* Ok, this is close enough. We can say goodbye to our parent now.
*/
if (victim > 0)
- remove_pidfile(devname);
- pid_dir = VAR_RUN;
- if (make_pidfile(devname) < 0) {
- /* Try the alternate */
- pid_dir = ALT_RUN;
- if (make_pidfile(devname) < 0) {
- fprintf(stderr, "mdmon: Neither %s nor %s are writable\n"
- " cannot create .pid or .sock files. Aborting\n",
- VAR_RUN, ALT_RUN);
- exit(3);
- }
+ remove_pidfile(devnm);
+ if (make_pidfile(devnm) < 0) {
+ exit(3);
}
- container->sock = make_control_sock(devname);
+ container->sock = make_control_sock(devnm);
status = 0;
- if (write(pfd[1], &status, sizeof(status)) < 0)
- fprintf(stderr, "mdmon: failed to notify our parent: %d\n",
- getppid());
- close(pfd[1]);
+ if (pfd[1] >= 0) {
+ if (write(pfd[1], &status, sizeof(status)) < 0)
+ pr_err("failed to notify our parent: %d\n",
+ getppid());
+ close(pfd[1]);
+ }
mlockall(MCL_CURRENT | MCL_FUTURE);
if (clone_monitor(container) < 0) {
- fprintf(stderr, "mdmon: failed to start monitor process: %s\n",
+ pr_err("failed to start monitor process: %s\n",
strerror(errno));
exit(2);
}
if (victim > 0) {
- try_kill_monitor(victim, container->devname, victim_sock);
- close(victim_sock);
+ try_kill_monitor(victim, container->devnm, victim_sock);
+ if (victim_sock >= 0)
+ close(victim_sock);
}
setsid();
ignore = dup(0);
#endif
+ /* This silliness is to stop the compiler complaining
+ * that we ignore 'ignore'
+ */
+ if (ignore)
+ ignore++;
+
do_manager(container);
exit(0);
}
+
+/* Some stub functions so super-* can link with us */
+int child_monitor(int afd, struct mdinfo *sra, struct reshape *reshape,
+ struct supertype *st, unsigned long blocks,
+ int *fds, unsigned long long *offsets,
+ int dests, int *destfd, unsigned long long *destoffsets)
+{
+ return 0;
+}
+
+int restore_stripes(int *dest, unsigned long long *offsets,
+ int raid_disks, int chunk_size, int level, int layout,
+ int source, unsigned long long read_offset,
+ unsigned long long start, unsigned long long length,
+ char *src_buf)
+{
+ return 1;
+}
+
+void abort_reshape(struct mdinfo *sra)
+{
+ return;
+}
+
+int save_stripes(int *source, unsigned long long *offsets,
+ int raid_disks, int chunk_size, int level, int layout,
+ int nwrites, int *dest,
+ unsigned long long start, unsigned long long length,
+ char *buf)
+{
+ return 0;
+}
projects / thirdparty / mdadm.git / blobdiff