static int
do_mount(char *specialfile, char *dir, char *filesystemtype,
long flags, void *string_flags, int useMtab, int fakeIt,
char *mtab_opts, int mount_all)
{
int status = 0;
#if defined BB_FEATURE_MOUNT_LOOP
char *lofile = NULL;
#endif
if (! fakeIt)
{
#if defined BB_FEATURE_MOUNT_LOOP
if (use_loop==TRUE) {
int loro = flags & MS_RDONLY;
lofile = specialfile;
specialfile = find_unused_loop_device();
if (specialfile == NULL) {
error_msg_and_die("Could not find a spare loop device");
}
if (set_loop(specialfile, lofile, 0, &loro)) {
error_msg_and_die("Could not setup loop device");
}
if (!(flags & MS_RDONLY) && loro) { /* loop is ro, but wanted rw */
error_msg("WARNING: loop device is read-only");
flags |= MS_RDONLY;
}
}
#endif
status = mount(specialfile, dir, filesystemtype, flags, string_flags);
if (status < 0 && errno == EROFS) {
error_msg("%s is write-protected, mounting read-only", specialfile);
status = mount(specialfile, dir, filesystemtype, flags |= MS_RDONLY, string_flags);
}
/* Don't whine about already mounted filesystems when mounting all. */
if (status < 0 && errno == EBUSY && mount_all)
return TRUE;
}
/* If the mount was sucessful, do anything needed, then return TRUE */
if (status == 0 || fakeIt==TRUE) {
#if defined BB_FEATURE_MTAB_SUPPORT
if (useMtab) {
erase_mtab(specialfile); // Clean any stale entries
write_mtab(specialfile, dir, filesystemtype, flags, mtab_opts);
}
#endif
return (TRUE);
}
/* Bummer. mount failed. Clean up */
#if defined BB_FEATURE_MOUNT_LOOP
if (lofile != NULL) {
del_loop(specialfile);
}
#endif
if (errno == EPERM) {
error_msg_and_die("permission denied. Are you root?");
}
return (FALSE);
}
int do_mount (char *source, char *target, char *fstype, long flags,
int fakeIt, int mountall, int loop)
{
int ret = 0;
char *loopfile = NULL;
if (source == NULL || target == NULL || fstype == NULL) {
printf("%s:%d: invalid settings.\n", __FUNCTION__, __LINE__);
return 1;
}
if (!fakeIt) {
if (loop) {
int loro = flags & MS_RDONLY;
loopfile = strdup(source);
source = find_unused_loop_device();
if (!source) {
printf("Find spare loop device failed.\n");
if (loopfile != NULL) { free(loopfile); loopfile = NULL;}
return 1;
}
if (set_loop(source, loopfile, 0, &loro)) {
if (loopfile != NULL) { free(loopfile); loopfile = NULL;}
return 1;
}
if (!(flags & MS_RDONLY) && !loro) {
flags |= MS_RDONLY;
}
}
ret = mount(source, target, fstype, flags, NULL);
if (ret < 0) {
perror("Mount fail");
fprintf(stderr, "%s:%d, mount %s on %s fail\n", __FUNCTION__, __LINE__, source, target);
}
if (ret < 0 && errno == EROFS) {
printf("%s is write-protected, mounting read-only.\n", source);
ret = mount(source, target, fstype, flags |= MS_RDONLY, NULL);
}
/* Don't whine about already mounted filesystems when mounting all. */
if (ret < 0 && errno == EBUSY && mountall) {
if (loopfile != NULL) { free(loopfile); loopfile = NULL;}
return 0;
}
}
if (ret == 0 || fakeIt == 1) {
if (loop) {
if (g_LoopData == NULL) {
g_LoopData = malloc(sizeof(LOOP_DATA) * MAX_LOOP_DATA);
if (g_LoopData) {
memset(g_LoopData,0,sizeof(LOOP_DATA) * MAX_LOOP_DATA);
}
}
if (g_LoopData) { // we need to save it for umount
int k,loopfile_len;
for (k=0;k<MAX_LOOP_DATA;k++) {
if (g_LoopData[k].source == NULL) {
g_LoopData[k].source = source; //we need to free it when we do umount
g_LoopData[k].target = strdup(target);
loopfile_len = strlen(loopfile) + 1;
g_LoopData[k].orgfile = malloc(loopfile_len);
strncpy(g_LoopData[k].orgfile,loopfile,loopfile_len);
printf("save loop data(%d) source : %s target : %s\n",k,g_LoopData[k].source,g_LoopData[k].target);
break;
}
}
}
}
if (loopfile != NULL) { free(loopfile); loopfile = NULL;}
return 0;
}
if (loopfile != NULL) {
del_loop(source);
free(source);
if (loopfile != NULL) { free(loopfile); loopfile = NULL;}
}
if (ret == EPERM) {
printf("You don't have enough permission.\n");
}
return 1;
}
int
main(int argc, char **argv){
int fd, i, j, m, n, op, off, arg, c, d;
struct slice all;
struct pt *ptp;
enum action what = LIST;
char *type, *diskdevice, *device, *progname;
int verbose = 0;
char partname[PARTNAME_SIZE], params[PARTNAME_SIZE + 16];
char * loopdev = NULL;
char * delim = NULL;
char *uuid = NULL;
char *mapname = NULL;
int loopro = 0;
int hotplug = 0;
int loopcreated = 0;
int sync = 0;
struct stat buf;
uint32_t cookie = 0;
initpts();
init_crc32();
type = device = diskdevice = NULL;
memset(&all, 0, sizeof(all));
memset(&partname, 0, sizeof(partname));
/* Check whether hotplug mode. */
progname = strrchr(argv[0], '/');
if (!progname)
progname = argv[0];
else
progname++;
if (!strcmp(progname, "kpartx.dev")) { /* Hotplug mode */
hotplug = 1;
/* Setup for original kpartx variables */
if (!(device = get_hotplug_device()))
exit(1);
diskdevice = device;
what = ADD;
} else if (argc < 2) {
usage();
exit(1);
}
while ((arg = getopt(argc, argv, short_opts)) != EOF) switch(arg) {
case 'g':
force_gpt=1;
break;
case 't':
type = optarg;
break;
case 'v':
verbose = 1;
break;
case 'p':
delim = optarg;
break;
case 'l':
what = LIST;
break;
case 'a':
what = ADD;
break;
case 'd':
what = DELETE;
break;
case 's':
sync = 1;
break;
default:
usage();
exit(1);
}
if (!sync)
dm_udev_set_sync_support(0);
if (dm_prereq(DM_TARGET, 0, 0, 0) && (what == ADD || what == DELETE)) {
fprintf(stderr, "device mapper prerequisites not met\n");
exit(1);
}
if (hotplug) {
/* already got [disk]device */
} else if (optind == argc-2) {
device = argv[optind];
diskdevice = argv[optind+1];
} else if (optind == argc-1) {
diskdevice = device = argv[optind];
} else {
usage();
exit(1);
}
if (stat(device, &buf)) {
printf("failed to stat() %s\n", device);
exit (1);
}
if (S_ISREG (buf.st_mode)) {
/* already looped file ? */
loopdev = find_loop_by_file(device);
if (!loopdev && what == DELETE)
exit (0);
if (!loopdev) {
loopdev = find_unused_loop_device();
if (set_loop(loopdev, device, 0, &loopro)) {
fprintf(stderr, "can't set up loop\n");
exit (1);
}
loopcreated = 1;
}
device = loopdev;
}
if (delim == NULL) {
delim = malloc(DELIM_SIZE);
memset(delim, 0, DELIM_SIZE);
set_delimiter(device, delim);
}
off = find_devname_offset(device);
if (!loopdev) {
uuid = dm_mapuuid((unsigned int)MAJOR(buf.st_rdev),
(unsigned int)MINOR(buf.st_rdev));
mapname = dm_mapname((unsigned int)MAJOR(buf.st_rdev),
(unsigned int)MINOR(buf.st_rdev));
}
if (!uuid)
uuid = device + off;
if (!mapname)
mapname = device + off;
fd = open(device, O_RDONLY);
if (fd == -1) {
perror(device);
exit(1);
}
/* add/remove partitions to the kernel devmapper tables */
int r = 0;
for (i = 0; i < ptct; i++) {
ptp = &pts[i];
if (type && strcmp(type, ptp->type))
continue;
/* here we get partitions */
n = ptp->fn(fd, all, slices, SIZE(slices));
#ifdef DEBUG
if (n >= 0)
printf("%s: %d slices\n", ptp->type, n);
#endif
if (n > 0)
close(fd);
else
continue;
switch(what) {
case LIST:
for (j = 0, c = 0, m = 0; j < n; j++) {
if (slices[j].size == 0)
continue;
if (slices[j].container > 0) {
c++;
continue;
}
slices[j].minor = m++;
printf("%s%s%d : 0 %" PRIu64 " %s %" PRIu64"\n",
mapname, delim, j+1,
slices[j].size, device,
slices[j].start);
}
/* Loop to resolve contained slices */
d = c;
while (c) {
for (j = 0; j < n; j++) {
uint64_t start;
int k = slices[j].container - 1;
if (slices[j].size == 0)
continue;
if (slices[j].minor > 0)
continue;
if (slices[j].container == 0)
continue;
slices[j].minor = m++;
start = slices[j].start - slices[k].start;
printf("%s%s%d : 0 %" PRIu64 " /dev/dm-%d %" PRIu64 "\n",
mapname, delim, j+1,
slices[j].size,
slices[k].minor, start);
c--;
}
/* Terminate loop if nothing more to resolve */
if (d == c)
break;
}
if (loopcreated && S_ISREG (buf.st_mode)) {
if (del_loop(device)) {
if (verbose)
printf("can't del loop : %s\n",
device);
exit(1);
}
printf("loop deleted : %s\n", device);
}
break;
case DELETE:
for (j = n-1; j >= 0; j--) {
if (safe_sprintf(partname, "%s%s%d",
mapname, delim, j+1)) {
fprintf(stderr, "partname too small\n");
exit(1);
}
strip_slash(partname);
if (!slices[j].size || !dm_map_present(partname))
continue;
if (!dm_simplecmd(DM_DEVICE_REMOVE, partname,
0, &cookie)) {
r++;
continue;
}
if (verbose)
printf("del devmap : %s\n", partname);
}
if (S_ISREG (buf.st_mode)) {
if (del_loop(device)) {
if (verbose)
printf("can't del loop : %s\n",
device);
exit(1);
}
printf("loop deleted : %s\n", device);
}
break;
case ADD:
for (j = 0, c = 0; j < n; j++) {
if (slices[j].size == 0)
continue;
/* Skip all contained slices */
if (slices[j].container > 0) {
c++;
continue;
}
if (safe_sprintf(partname, "%s%s%d",
mapname, delim, j+1)) {
fprintf(stderr, "partname too small\n");
exit(1);
}
strip_slash(partname);
if (safe_sprintf(params, "%s %" PRIu64 ,
device, slices[j].start)) {
fprintf(stderr, "params too small\n");
exit(1);
}
op = (dm_map_present(partname) ?
DM_DEVICE_RELOAD : DM_DEVICE_CREATE);
if (!dm_addmap(op, partname, DM_TARGET, params,
slices[j].size, uuid, j+1,
buf.st_mode & 0777, buf.st_uid,
buf.st_gid, &cookie)) {
fprintf(stderr, "create/reload failed on %s\n",
partname);
r++;
}
if (op == DM_DEVICE_RELOAD &&
!dm_simplecmd(DM_DEVICE_RESUME, partname,
1, &cookie)) {
fprintf(stderr, "resume failed on %s\n",
partname);
r++;
}
dm_devn(partname, &slices[j].major,
&slices[j].minor);
if (verbose)
printf("add map %s (%d:%d): 0 %" PRIu64 " %s %s\n",
partname, slices[j].major,
slices[j].minor, slices[j].size,
DM_TARGET, params);
}
/* Loop to resolve contained slices */
d = c;
while (c) {
for (j = 0; j < n; j++) {
uint64_t start;
int k = slices[j].container - 1;
if (slices[j].size == 0)
continue;
/* Skip all existing slices */
if (slices[j].minor > 0)
continue;
/* Skip all simple slices */
if (slices[j].container == 0)
continue;
/* Check container slice */
if (slices[k].size == 0)
fprintf(stderr, "Invalid slice %d\n",
k);
if (safe_sprintf(partname, "%s%s%d",
mapname, delim, j+1)) {
fprintf(stderr, "partname too small\n");
exit(1);
}
strip_slash(partname);
start = slices[j].start - slices[k].start;
if (safe_sprintf(params, "%d:%d %" PRIu64,
slices[k].major,
slices[k].minor,
start)) {
fprintf(stderr, "params too small\n");
exit(1);
}
op = (dm_map_present(partname) ?
DM_DEVICE_RELOAD : DM_DEVICE_CREATE);
dm_addmap(op, partname, DM_TARGET, params,
slices[j].size, uuid, j+1,
buf.st_mode & 0777,
buf.st_uid, buf.st_gid,
&cookie);
if (op == DM_DEVICE_RELOAD)
dm_simplecmd(DM_DEVICE_RESUME,
partname, 1,
&cookie);
dm_devn(partname, &slices[j].major,
&slices[j].minor);
if (verbose)
printf("add map %s : 0 %" PRIu64 " %s %s\n",
partname, slices[j].size,
DM_TARGET, params);
c--;
}
/* Terminate loop */
if (d == c)
break;
}
break;
default:
break;
}
if (n > 0)
break;
}
dm_udev_wait(cookie);
dm_lib_release();
dm_lib_exit();
return r;
}
