2 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
3 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public License version 2.1
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
27 #include <sys/types.h>
29 #include <sys/mount.h>
35 #include <libubox/ulog.h>
36 #include <libubox/list.h>
37 #include <libubox/vlist.h>
38 #include <libubox/blobmsg_json.h>
39 #include <libubox/avl-cmp.h>
41 #include "libblkid-tiny/libblkid-tiny.h"
44 #include "libubi/libubi.h"
53 struct vlist_node node
;
69 static struct vlist_tree mounts
;
70 static struct blob_buf b
;
71 static LIST_HEAD(devices
);
72 static int anon_mount
, anon_swap
, auto_mount
, auto_swap
, check_fs
;
73 static unsigned int delay_root
;
85 static const struct blobmsg_policy config_policy
[__CFG_MAX
] = {
86 [CFG_ANON_SWAP
] = { .name
= "anon_swap", .type
= BLOBMSG_TYPE_INT32
},
87 [CFG_ANON_MOUNT
] = { .name
= "anon_mount", .type
= BLOBMSG_TYPE_INT32
},
88 [CFG_AUTO_SWAP
] = { .name
= "auto_swap", .type
= BLOBMSG_TYPE_INT32
},
89 [CFG_AUTO_MOUNT
] = { .name
= "auto_mount", .type
= BLOBMSG_TYPE_INT32
},
90 [CFG_DELAY_ROOT
] = { .name
= "delay_root", .type
= BLOBMSG_TYPE_INT32
},
91 [CFG_CHECK_FS
] = { .name
= "check_fs", .type
= BLOBMSG_TYPE_INT32
},
104 static const struct uci_blob_param_list config_attr_list
= {
105 .n_params
= __CFG_MAX
,
106 .params
= config_policy
,
109 static const struct blobmsg_policy mount_policy
[__MOUNT_MAX
] = {
110 [MOUNT_UUID
] = { .name
= "uuid", .type
= BLOBMSG_TYPE_STRING
},
111 [MOUNT_LABEL
] = { .name
= "label", .type
= BLOBMSG_TYPE_STRING
},
112 [MOUNT_DEVICE
] = { .name
= "device", .type
= BLOBMSG_TYPE_STRING
},
113 [MOUNT_TARGET
] = { .name
= "target", .type
= BLOBMSG_TYPE_STRING
},
114 [MOUNT_OPTIONS
] = { .name
= "options", .type
= BLOBMSG_TYPE_STRING
},
115 [MOUNT_ENABLE
] = { .name
= "enabled", .type
= BLOBMSG_TYPE_INT32
},
118 static const struct uci_blob_param_list mount_attr_list
= {
119 .n_params
= __MOUNT_MAX
,
120 .params
= mount_policy
,
132 static const struct blobmsg_policy swap_policy
[__SWAP_MAX
] = {
133 [SWAP_ENABLE
] = { .name
= "enabled", .type
= BLOBMSG_TYPE_INT32
},
134 [SWAP_UUID
] = { .name
= "uuid", .type
= BLOBMSG_TYPE_STRING
},
135 [SWAP_LABEL
] = { .name
= "label", .type
= BLOBMSG_TYPE_STRING
},
136 [SWAP_DEVICE
] = { .name
= "device", .type
= BLOBMSG_TYPE_STRING
},
137 [SWAP_PRIO
] = { .name
= "priority", .type
= BLOBMSG_TYPE_INT32
},
140 static const struct uci_blob_param_list swap_attr_list
= {
141 .n_params
= __SWAP_MAX
,
142 .params
= swap_policy
,
151 # define MS_DIRSYNC (1 << 7)
155 # define MS_RELATIME (1 << 21)
158 #ifndef MS_STRICTATIME
159 # define MS_STRICTATIME (1 << 24)
162 static const struct mount_flag mount_flags
[] = {
163 { "sync", MS_SYNCHRONOUS
},
164 { "async", ~MS_SYNCHRONOUS
},
165 { "dirsync", MS_DIRSYNC
},
166 { "mand", MS_MANDLOCK
},
167 { "nomand", ~MS_MANDLOCK
},
168 { "atime", ~MS_NOATIME
},
169 { "noatime", MS_NOATIME
},
170 { "dev", ~MS_NODEV
},
171 { "nodev", MS_NODEV
},
172 { "diratime", ~MS_NODIRATIME
},
173 { "nodiratime", MS_NODIRATIME
},
174 { "exec", ~MS_NOEXEC
},
175 { "noexec", MS_NOEXEC
},
176 { "suid", ~MS_NOSUID
},
177 { "nosuid", MS_NOSUID
},
178 { "rw", ~MS_RDONLY
},
180 { "relatime", MS_RELATIME
},
181 { "norelatime", ~MS_RELATIME
},
182 { "strictatime", MS_STRICTATIME
},
185 static char *blobmsg_get_strdup(struct blob_attr
*attr
)
190 return strdup(blobmsg_get_string(attr
));
193 static char *blobmsg_get_basename(struct blob_attr
*attr
)
198 return strdup(basename(blobmsg_get_string(attr
)));
201 static void parse_mount_options(struct mount
*m
, char *optstr
)
205 char *p
, *opts
, *last
;
210 if (!optstr
|| !*optstr
)
213 m
->options
= opts
= calloc(1, strlen(optstr
) + 1);
226 for (i
= 0, is_flag
= false; i
< ARRAY_SIZE(mount_flags
); i
++) {
227 if (!strcmp(last
, mount_flags
[i
].name
)) {
228 if (mount_flags
[i
].flag
< 0)
229 m
->flags
&= (uint32_t)mount_flags
[i
].flag
;
231 m
->flags
|= (uint32_t)mount_flags
[i
].flag
;
238 opts
+= sprintf(opts
, "%s%s", (opts
> m
->options
) ? "," : "", last
);
247 static int mount_add(struct uci_section
*s
)
249 struct blob_attr
*tb
[__MOUNT_MAX
] = { 0 };
252 blob_buf_init(&b
, 0);
253 uci_to_blob(&b
, s
, &mount_attr_list
);
254 blobmsg_parse(mount_policy
, __MOUNT_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
256 if (!tb
[MOUNT_LABEL
] && !tb
[MOUNT_UUID
] && !tb
[MOUNT_DEVICE
])
259 if (tb
[MOUNT_ENABLE
] && !blobmsg_get_u32(tb
[MOUNT_ENABLE
]))
262 m
= malloc(sizeof(struct mount
));
263 m
->type
= TYPE_MOUNT
;
264 m
->uuid
= blobmsg_get_strdup(tb
[MOUNT_UUID
]);
265 m
->label
= blobmsg_get_strdup(tb
[MOUNT_LABEL
]);
266 m
->target
= blobmsg_get_strdup(tb
[MOUNT_TARGET
]);
267 m
->device
= blobmsg_get_basename(tb
[MOUNT_DEVICE
]);
269 parse_mount_options(m
, blobmsg_get_strdup(tb
[MOUNT_OPTIONS
]));
271 m
->overlay
= m
->extroot
= 0;
272 if (m
->target
&& !strcmp(m
->target
, "/"))
274 if (m
->target
&& !strcmp(m
->target
, "/overlay"))
275 m
->extroot
= m
->overlay
= 1;
277 if (m
->target
&& *m
->target
!= '/') {
278 ULOG_WARN("ignoring mount section %s due to invalid target '%s'\n",
279 s
->e
.name
, m
->target
);
285 vlist_add(&mounts
, &m
->node
, m
->uuid
);
287 vlist_add(&mounts
, &m
->node
, m
->label
);
289 vlist_add(&mounts
, &m
->node
, m
->device
);
294 static int swap_add(struct uci_section
*s
)
296 struct blob_attr
*tb
[__SWAP_MAX
] = { 0 };
299 blob_buf_init(&b
, 0);
300 uci_to_blob(&b
, s
, &swap_attr_list
);
301 blobmsg_parse(swap_policy
, __SWAP_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
303 if (!tb
[SWAP_UUID
] && !tb
[SWAP_LABEL
] && !tb
[SWAP_DEVICE
])
306 m
= malloc(sizeof(struct mount
));
307 memset(m
, 0, sizeof(struct mount
));
309 m
->uuid
= blobmsg_get_strdup(tb
[SWAP_UUID
]);
310 m
->label
= blobmsg_get_strdup(tb
[SWAP_LABEL
]);
311 m
->device
= blobmsg_get_basename(tb
[SWAP_DEVICE
]);
313 m
->prio
= blobmsg_get_u32(tb
[SWAP_PRIO
]);
315 m
->prio
= ((m
->prio
<< SWAP_FLAG_PRIO_SHIFT
) & SWAP_FLAG_PRIO_MASK
) | SWAP_FLAG_PREFER
;
317 if ((!tb
[SWAP_ENABLE
]) || blobmsg_get_u32(tb
[SWAP_ENABLE
])) {
318 /* store complete swap path */
320 m
->target
= blobmsg_get_strdup(tb
[SWAP_DEVICE
]);
323 vlist_add(&mounts
, &m
->node
, m
->uuid
);
325 vlist_add(&mounts
, &m
->node
, m
->label
);
327 vlist_add(&mounts
, &m
->node
, m
->device
);
333 static int global_add(struct uci_section
*s
)
335 struct blob_attr
*tb
[__CFG_MAX
] = { 0 };
337 blob_buf_init(&b
, 0);
338 uci_to_blob(&b
, s
, &config_attr_list
);
339 blobmsg_parse(config_policy
, __CFG_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
341 if ((tb
[CFG_ANON_MOUNT
]) && blobmsg_get_u32(tb
[CFG_ANON_MOUNT
]))
343 if ((tb
[CFG_ANON_SWAP
]) && blobmsg_get_u32(tb
[CFG_ANON_SWAP
]))
346 if ((tb
[CFG_AUTO_MOUNT
]) && blobmsg_get_u32(tb
[CFG_AUTO_MOUNT
]))
348 if ((tb
[CFG_AUTO_SWAP
]) && blobmsg_get_u32(tb
[CFG_AUTO_SWAP
]))
351 if (tb
[CFG_DELAY_ROOT
])
352 delay_root
= blobmsg_get_u32(tb
[CFG_DELAY_ROOT
]);
354 if ((tb
[CFG_CHECK_FS
]) && blobmsg_get_u32(tb
[CFG_CHECK_FS
]))
360 static struct mount
* find_swap(const char *uuid
, const char *label
, const char *device
)
364 vlist_for_each_element(&mounts
, m
, node
) {
365 if (m
->type
!= TYPE_SWAP
)
367 if (uuid
&& m
->uuid
&& !strcasecmp(m
->uuid
, uuid
))
369 if (label
&& m
->label
&& !strcmp(m
->label
, label
))
371 if (device
&& m
->device
&& !strcmp(m
->device
, device
))
378 static struct mount
* find_block(const char *uuid
, const char *label
, const char *device
,
383 vlist_for_each_element(&mounts
, m
, node
) {
384 if (m
->type
!= TYPE_MOUNT
)
386 if (m
->uuid
&& uuid
&& !strcasecmp(m
->uuid
, uuid
))
388 if (m
->label
&& label
&& !strcmp(m
->label
, label
))
390 if (m
->target
&& target
&& !strcmp(m
->target
, target
))
392 if (m
->device
&& device
&& !strcmp(m
->device
, device
))
399 static void mounts_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
400 struct vlist_node
*node_old
)
404 static struct uci_package
* config_try_load(struct uci_context
*ctx
, char *path
)
406 char *file
= basename(path
);
407 char *dir
= dirname(path
);
409 struct uci_package
*pkg
;
411 uci_set_confdir(ctx
, dir
);
412 ULOG_INFO("attempting to load %s/%s\n", dir
, file
);
414 if (uci_load(ctx
, file
, &pkg
)) {
415 uci_get_errorstr(ctx
, &err
, file
);
416 ULOG_ERR("unable to load configuration (%s)\n", err
);
425 static int config_load(char *cfg
)
427 struct uci_context
*ctx
= uci_alloc_context();
428 struct uci_package
*pkg
= NULL
;
429 struct uci_element
*e
;
432 vlist_init(&mounts
, avl_strcmp
, mounts_update
);
435 snprintf(path
, sizeof(path
), "%s/upper/etc/config/fstab", cfg
);
436 pkg
= config_try_load(ctx
, path
);
439 snprintf(path
, sizeof(path
), "%s/etc/config/fstab", cfg
);
440 pkg
= config_try_load(ctx
, path
);
445 snprintf(path
, sizeof(path
), "/etc/config/fstab");
446 pkg
= config_try_load(ctx
, path
);
450 ULOG_ERR("no usable configuration\n");
454 vlist_update(&mounts
);
455 uci_foreach_element(&pkg
->sections
, e
) {
456 struct uci_section
*s
= uci_to_section(e
);
458 if (!strcmp(s
->type
, "mount"))
460 if (!strcmp(s
->type
, "swap"))
462 if (!strcmp(s
->type
, "global"))
465 vlist_flush(&mounts
);
470 static struct blkid_struct_probe
* _probe_path(char *path
)
472 struct blkid_struct_probe
*pr
;
474 pr
= malloc(sizeof(*pr
));
479 memset(pr
, 0, sizeof(*pr
));
480 probe_block(path
, pr
);
482 if (pr
->err
|| !pr
->id
) {
490 static int _cache_load(const char *path
)
492 int gl_flags
= GLOB_NOESCAPE
| GLOB_MARK
;
496 if (glob(path
, gl_flags
, NULL
, &gl
) < 0)
499 for (j
= 0; j
< gl
.gl_pathc
; j
++) {
500 struct blkid_struct_probe
*pr
= _probe_path(gl
.gl_pathv
[j
]);
502 list_add_tail(&pr
->list
, &devices
);
510 static void cache_load(int mtd
)
513 _cache_load("/dev/mtdblock*");
514 _cache_load("/dev/ubiblock*");
515 _cache_load("/dev/ubi?*_?*");
517 _cache_load("/dev/mmcblk*");
518 _cache_load("/dev/sd*");
519 _cache_load("/dev/hd*");
520 _cache_load("/dev/md*");
521 _cache_load("/dev/vd*");
522 _cache_load("/dev/mapper/*");
525 static int print_block_info(struct blkid_struct_probe
*pr
)
527 printf("%s:", pr
->dev
);
529 printf(" UUID=\"%s\"", pr
->uuid
);
532 printf(" LABEL=\"%s\"", pr
->label
);
535 printf(" NAME=\"%s\"", pr
->name
);
538 printf(" VERSION=\"%s\"", pr
->version
);
540 printf(" TYPE=\"%s\"\n", pr
->id
->name
);
545 static int print_block_uci(struct blkid_struct_probe
*pr
)
547 if (!strcmp(pr
->id
->name
, "swap")) {
548 printf("config 'swap'\n");
550 printf("config 'mount'\n");
551 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr
->dev
));
554 printf("\toption\tuuid\t'%s'\n", pr
->uuid
);
556 printf("\toption\tdevice\t'%s'\n", pr
->dev
);
557 printf("\toption\tenabled\t'0'\n\n");
562 static struct blkid_struct_probe
* find_block_info(char *uuid
, char *label
, char *path
)
564 struct blkid_struct_probe
*pr
= NULL
;
567 list_for_each_entry(pr
, &devices
, list
)
568 if (!strcasecmp(pr
->uuid
, uuid
))
572 list_for_each_entry(pr
, &devices
, list
)
573 if (!strcmp(pr
->label
, label
))
577 list_for_each_entry(pr
, &devices
, list
)
578 if (!strcmp(basename(pr
->dev
), basename(path
)))
584 static char* find_mount_point(char *block
)
586 FILE *fp
= fopen("/proc/mounts", "r");
587 static char line
[256];
588 int len
= strlen(block
);
594 while (fgets(line
, sizeof(line
), fp
)) {
595 if (!strncmp(line
, block
, len
)) {
596 char *p
= &line
[len
+ 1];
597 char *t
= strstr(p
, " ");
614 static void mkdir_p(char *dir
)
616 char *l
= strrchr(dir
, '/');
626 static void check_filesystem(struct blkid_struct_probe
*pr
)
630 const char *e2fsck
= "/usr/sbin/e2fsck";
631 const char *dosfsck
= "/usr/sbin/dosfsck";
634 /* UBIFS does not need stuff like fsck */
635 if (!strncmp(pr
->id
->name
, "ubifs", 5))
638 if (!strncmp(pr
->id
->name
, "vfat", 4)) {
640 } else if (!strncmp(pr
->id
->name
, "ext", 3)) {
643 ULOG_ERR("check_filesystem: %s is not supported\n", pr
->id
->name
);
647 if (stat(ckfs
, &statbuf
) < 0) {
648 ULOG_ERR("check_filesystem: %s not found\n", ckfs
);
654 execl(ckfs
, ckfs
, "-p", pr
->dev
, NULL
);
656 } else if (pid
> 0) {
659 waitpid(pid
, &status
, 0);
660 if (WEXITSTATUS(status
))
661 ULOG_ERR("check_filesystem: %s returned %d\n", ckfs
, WEXITSTATUS(status
));
665 static void handle_swapfiles(bool on
)
669 struct blkid_struct_probe
*pr
;
671 vlist_for_each_element(&mounts
, m
, node
)
673 if (m
->type
!= TYPE_SWAP
|| !m
->target
)
676 if (stat(m
->target
, &s
) || !S_ISREG(s
.st_mode
))
679 pr
= _probe_path(m
->target
);
684 if (!strcmp(pr
->id
->name
, "swap")) {
686 swapon(pr
->dev
, m
->prio
);
695 static int mount_device(struct blkid_struct_probe
*pr
, int hotplug
)
703 device
= basename(pr
->dev
);
705 if (!strcmp(pr
->id
->name
, "swap")) {
706 if (hotplug
&& !auto_swap
)
708 m
= find_swap(pr
->uuid
, pr
->label
, device
);
710 swapon(pr
->dev
, (m
) ? (m
->prio
) : (0));
715 if (hotplug
&& !auto_mount
)
718 if (find_mount_point(pr
->dev
)) {
719 ULOG_ERR("%s is already mounted\n", pr
->dev
);
723 m
= find_block(pr
->uuid
, pr
->label
, device
, NULL
);
728 char *target
= m
->target
;
733 snprintf(_target
, sizeof(_target
), "/mnt/%s", device
);
739 check_filesystem(pr
);
741 err
= mount(pr
->dev
, target
, pr
->id
->name
, m
->flags
,
742 (m
->options
) ? (m
->options
) : (""));
744 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %s\n",
745 pr
->dev
, pr
->id
->name
, target
, err
, strerror(err
));
747 handle_swapfiles(true);
752 char target
[] = "/mnt/mmcblk123";
755 snprintf(target
, sizeof(target
), "/mnt/%s", device
);
759 check_filesystem(pr
);
761 err
= mount(pr
->dev
, target
, pr
->id
->name
, 0, "");
763 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %s\n",
764 pr
->dev
, pr
->id
->name
, target
, err
, strerror(err
));
766 handle_swapfiles(true);
773 static int umount_device(struct blkid_struct_probe
*pr
)
776 char *device
= basename(pr
->dev
);
783 if (!strcmp(pr
->id
->name
, "swap"))
786 mp
= find_mount_point(pr
->dev
);
790 m
= find_block(pr
->uuid
, pr
->label
, device
, NULL
);
794 err
= umount2(mp
, MNT_DETACH
);
796 ULOG_ERR("unmounting %s (%s) failed (%d) - %s\n",
797 pr
->dev
, mp
, err
, strerror(err
));
799 ULOG_INFO("unmounted %s (%s)\n",
805 static int main_hotplug(int argc
, char **argv
)
808 char *action
, *device
, *mount_point
;
810 action
= getenv("ACTION");
811 device
= getenv("DEVNAME");
813 if (!action
|| !device
)
815 snprintf(path
, sizeof(path
), "/dev/%s", device
);
817 if (!strcmp(action
, "remove")) {
819 mount_point
= find_mount_point(path
);
821 err
= umount2(mount_point
, MNT_DETACH
);
824 ULOG_ERR("umount of %s failed (%d) - %s\n",
825 mount_point
, err
, strerror(err
));
828 } else if (strcmp(action
, "add")) {
829 ULOG_ERR("Unkown action %s\n", action
);
834 if (config_load(NULL
))
838 return mount_device(find_block_info(NULL
, NULL
, path
), 1);
841 static int find_block_mtd(char *name
, char *part
, int plen
)
843 FILE *fp
= fopen("/proc/mtd", "r");
844 static char line
[256];
850 while (!index
&& fgets(line
, sizeof(line
), fp
)) {
851 if (strstr(line
, name
)) {
852 char *eol
= strstr(line
, ":");
867 snprintf(part
, plen
, "/dev/mtdblock%s", index
);
873 static int find_ubi_vol(libubi_t libubi
, char *name
, int *dev_num
, int *vol_id
)
877 while (ubi_dev_present(libubi
, dev
))
879 struct ubi_dev_info dev_info
;
880 struct ubi_vol_info vol_info
;
882 if (ubi_get_dev_info1(libubi
, dev
++, &dev_info
))
884 if (ubi_get_vol_info1_nm(libubi
, dev_info
.dev_num
, name
, &vol_info
))
887 *dev_num
= dev_info
.dev_num
;
888 *vol_id
= vol_info
.vol_id
;
896 static int find_block_ubi(libubi_t libubi
, char *name
, char *part
, int plen
)
902 err
= find_ubi_vol(libubi
, name
, &dev_num
, &vol_id
);
904 snprintf(part
, plen
, "/dev/ubi%d_%d", dev_num
, vol_id
);
909 static int find_block_ubi_RO(libubi_t libubi
, char *name
, char *part
, int plen
)
915 err
= find_ubi_vol(libubi
, name
, &dev_num
, &vol_id
);
917 snprintf(part
, plen
, "/dev/ubiblock%d_%d", dev_num
, vol_id
);
924 static int find_root_dev(char *buf
, int len
)
934 if (!(d
= opendir("/dev")))
939 while ((e
= readdir(d
)) != NULL
) {
940 snprintf(buf
, len
, "/dev/%s", e
->d_name
);
942 if (stat(buf
, &s
) || s
.st_rdev
!= root
)
955 static int test_fs_support(const char *name
)
961 if ((f
= fopen("/proc/filesystems", "r")) != NULL
) {
962 while (fgets(line
, sizeof(line
), f
)) {
963 p
= strtok(line
, "\t\n");
965 if (p
&& !strcmp(p
, "nodev"))
966 p
= strtok(NULL
, "\t\n");
968 if (p
&& !strcmp(p
, name
)) {
979 static int check_extroot(char *path
)
981 struct blkid_struct_probe
*pr
= NULL
;
985 if (find_block_mtd("\"rootfs\"", devpath
, sizeof(devpath
))) {
989 libubi
= libubi_open();
990 err
= find_block_ubi_RO(libubi
, "rootfs", devpath
, sizeof(devpath
));
991 libubi_close(libubi
);
996 if (find_block_mtd("\"rootfs\"", devpath
, sizeof(devpath
))) {
997 if (find_root_dev(devpath
, sizeof(devpath
))) {
998 ULOG_ERR("extroot: unable to determine root device\n");
1004 list_for_each_entry(pr
, &devices
, list
) {
1005 if (!strcmp(pr
->dev
, devpath
)) {
1009 char uuid
[64] = { 0 };
1011 snprintf(tag
, sizeof(tag
), "%s/etc", path
);
1015 snprintf(tag
, sizeof(tag
), "%s/etc/.extroot-uuid", path
);
1016 if (stat(tag
, &s
)) {
1017 fp
= fopen(tag
, "w+");
1019 ULOG_ERR("extroot: failed to write UUID to %s: %d (%s)\n",
1020 tag
, errno
, strerror(errno
));
1021 /* return 0 to continue boot regardless of error */
1024 fputs(pr
->uuid
, fp
);
1029 fp
= fopen(tag
, "r");
1031 ULOG_ERR("extroot: failed to read UUID from %s: %d (%s)\n",
1032 tag
, errno
, strerror(errno
));
1036 if (!fgets(uuid
, sizeof(uuid
), fp
))
1037 ULOG_ERR("extroot: failed to read UUID from %s: %d (%s)\n",
1038 tag
, errno
, strerror(errno
));
1041 if (*uuid
|| !strcasecmp(uuid
, pr
->uuid
))
1044 ULOG_ERR("extroot: UUID mismatch (root: %s, %s: %s)\n",
1045 pr
->uuid
, basename(path
), uuid
);
1050 ULOG_ERR("extroot: unable to lookup root device %s\n", devpath
);
1055 * Read info about extroot from UCI (using prefix) and mount it.
1057 static int mount_extroot(char *cfg
)
1059 char overlay
[] = "/tmp/extroot/overlay";
1060 char mnt
[] = "/tmp/extroot/mnt";
1062 struct blkid_struct_probe
*pr
;
1066 /* Load @cfg/etc/config/fstab */
1067 if (config_load(cfg
))
1070 /* See if there is extroot-specific mount config */
1071 m
= find_block(NULL
, NULL
, NULL
, "/");
1073 m
= find_block(NULL
, NULL
, NULL
, "/overlay");
1075 if (!m
|| !m
->extroot
)
1077 ULOG_INFO("extroot: not configured\n");
1081 /* Find block device pointed by the mount config */
1082 pr
= find_block_info(m
->uuid
, m
->label
, m
->device
);
1084 if (!pr
&& delay_root
){
1085 ULOG_INFO("extroot: device not present, retrying in %u seconds\n", delay_root
);
1089 pr
= find_block_info(m
->uuid
, m
->label
, m
->device
);
1092 if (strncmp(pr
->id
->name
, "ext", 3) &&
1093 strncmp(pr
->id
->name
, "ubifs", 5)) {
1094 ULOG_ERR("extroot: unsupported filesystem %s, try ext4\n", pr
->id
->name
);
1098 if (test_fs_support(pr
->id
->name
)) {
1099 ULOG_ERR("extroot: filesystem %s not supported by kernel\n", pr
->id
->name
);
1108 check_filesystem(pr
);
1110 err
= mount(pr
->dev
, path
, pr
->id
->name
, m
->flags
,
1111 (m
->options
) ? (m
->options
) : (""));
1114 ULOG_ERR("extroot: mounting %s (%s) on %s failed: %d (%s)\n",
1115 pr
->dev
, pr
->id
->name
, path
, err
, strerror(err
));
1116 } else if (m
->overlay
) {
1117 err
= check_extroot(path
);
1122 ULOG_ERR("extroot: cannot find device %s%s\n",
1123 (m
->uuid
? "with UUID " : (m
->label
? "with label " : "")),
1124 (m
->uuid
? m
->uuid
: (m
->label
? m
->label
: m
->device
)));
1130 static int main_extroot(int argc
, char **argv
)
1132 struct blkid_struct_probe
*pr
;
1133 char blkdev_path
[32] = { 0 };
1135 #ifdef UBIFS_EXTROOT
1139 if (!getenv("PREINIT"))
1143 ULOG_ERR("Usage: block extroot\n");
1150 /* enable LOG_INFO messages */
1151 ulog_threshold(LOG_INFO
);
1154 * Look for "rootfs_data". We will want to mount it and check for
1155 * extroot configuration.
1158 /* Start with looking for MTD partition */
1159 find_block_mtd("\"rootfs_data\"", blkdev_path
, sizeof(blkdev_path
));
1160 if (blkdev_path
[0]) {
1161 pr
= find_block_info(NULL
, NULL
, blkdev_path
);
1162 if (pr
&& !strcmp(pr
->id
->name
, "jffs2")) {
1163 char cfg
[] = "/tmp/jffs_cfg";
1166 * Mount MTD part and try extroot (using
1167 * /etc/config/fstab from that partition)
1170 if (!mount(blkdev_path
, cfg
, "jffs2", MS_NOATIME
, NULL
)) {
1171 err
= mount_extroot(cfg
);
1172 umount2(cfg
, MNT_DETACH
);
1175 rmdir("/tmp/overlay");
1181 #ifdef UBIFS_EXTROOT
1182 /* ... but it also could be an UBI volume */
1183 memset(blkdev_path
, 0, sizeof(blkdev_path
));
1184 libubi
= libubi_open();
1185 find_block_ubi(libubi
, "rootfs_data", blkdev_path
, sizeof(blkdev_path
));
1186 libubi_close(libubi
);
1187 if (blkdev_path
[0]) {
1188 char cfg
[] = "/tmp/ubifs_cfg";
1190 /* Mount volume and try extroot (using fstab from that vol) */
1192 if (!mount(blkdev_path
, cfg
, "ubifs", MS_NOATIME
, NULL
)) {
1193 err
= mount_extroot(cfg
);
1194 umount2(cfg
, MNT_DETACH
);
1197 rmdir("/tmp/overlay");
1203 return mount_extroot(NULL
);
1206 static int main_mount(int argc
, char **argv
)
1208 struct blkid_struct_probe
*pr
;
1210 if (config_load(NULL
))
1214 list_for_each_entry(pr
, &devices
, list
)
1215 mount_device(pr
, 0);
1217 handle_swapfiles(true);
1222 static int main_umount(int argc
, char **argv
)
1224 struct blkid_struct_probe
*pr
;
1226 if (config_load(NULL
))
1229 handle_swapfiles(false);
1232 list_for_each_entry(pr
, &devices
, list
)
1238 static int main_detect(int argc
, char **argv
)
1240 struct blkid_struct_probe
*pr
;
1243 printf("config 'global'\n");
1244 printf("\toption\tanon_swap\t'0'\n");
1245 printf("\toption\tanon_mount\t'0'\n");
1246 printf("\toption\tauto_swap\t'1'\n");
1247 printf("\toption\tauto_mount\t'1'\n");
1248 printf("\toption\tdelay_root\t'5'\n");
1249 printf("\toption\tcheck_fs\t'0'\n\n");
1250 list_for_each_entry(pr
, &devices
, list
)
1251 print_block_uci(pr
);
1256 static int main_info(int argc
, char **argv
)
1259 struct blkid_struct_probe
*pr
;
1263 list_for_each_entry(pr
, &devices
, list
)
1264 print_block_info(pr
);
1269 for (i
= 2; i
< argc
; i
++) {
1272 if (stat(argv
[i
], &s
)) {
1273 ULOG_ERR("failed to stat %s\n", argv
[i
]);
1276 if (!S_ISBLK(s
.st_mode
)) {
1277 ULOG_ERR("%s is not a block device\n", argv
[i
]);
1280 pr
= find_block_info(NULL
, NULL
, argv
[i
]);
1282 print_block_info(pr
);
1288 static int swapon_usage(void)
1290 fprintf(stderr
, "Usage: swapon [-s] [-a] [[-p pri] DEVICE]\n\n"
1291 "\tStart swapping on [DEVICE]\n"
1292 " -a\tStart swapping on all swap devices\n"
1293 " -p pri\tSet priority of swap device\n"
1294 " -s\tShow summary\n");
1298 static int main_swapon(int argc
, char **argv
)
1304 struct blkid_struct_probe
*pr
;
1310 while ((ch
= getopt(argc
, argv
, "ap:s")) != -1) {
1313 fp
= fopen("/proc/swaps", "r");
1317 ULOG_ERR("failed to open /proc/swaps\n");
1320 while (getline(&lineptr
, &s
, fp
) > 0)
1321 printf("%s", lineptr
);
1328 list_for_each_entry(pr
, &devices
, list
) {
1329 if (strcmp(pr
->id
->name
, "swap"))
1331 if (swapon(pr
->dev
, 0))
1332 ULOG_ERR("failed to swapon %s\n", pr
->dev
);
1338 flags
= ((pri
<< SWAP_FLAG_PRIO_SHIFT
) & SWAP_FLAG_PRIO_MASK
) | SWAP_FLAG_PREFER
;
1341 return swapon_usage();
1346 if (optind
!= (argc
- 1))
1347 return swapon_usage();
1349 if (stat(argv
[optind
], &st
) || (!S_ISBLK(st
.st_mode
) && !S_ISREG(st
.st_mode
))) {
1350 ULOG_ERR("%s is not a block device or file\n", argv
[optind
]);
1353 err
= swapon(argv
[optind
], flags
);
1355 ULOG_ERR("failed to swapon %s (%d)\n", argv
[optind
], err
);
1362 static int main_swapoff(int argc
, char **argv
)
1365 ULOG_ERR("Usage: swapoff [-a] [DEVICE]\n\n"
1366 "\tStop swapping on DEVICE\n"
1367 " -a\tStop swapping on all swap devices\n");
1371 if (!strcmp(argv
[1], "-a")) {
1372 FILE *fp
= fopen("/proc/swaps", "r");
1376 ULOG_ERR("failed to open /proc/swaps\n");
1379 if (fgets(line
, sizeof(line
), fp
))
1380 while (fgets(line
, sizeof(line
), fp
)) {
1381 char *end
= strchr(line
, ' ');
1387 err
= swapoff(line
);
1389 ULOG_ERR("failed to swapoff %s (%d)\n", line
, err
);
1396 if (stat(argv
[1], &s
) || (!S_ISBLK(s
.st_mode
) && !S_ISREG(s
.st_mode
))) {
1397 ULOG_ERR("%s is not a block device or file\n", argv
[1]);
1400 err
= swapoff(argv
[1]);
1402 ULOG_ERR("failed to swapoff %s (%d)\n", argv
[1], err
);
1410 int main(int argc
, char **argv
)
1412 char *base
= basename(*argv
);
1416 ulog_open(-1, -1, "block");
1417 ulog_threshold(LOG_NOTICE
);
1419 if (!strcmp(base
, "swapon"))
1420 return main_swapon(argc
, argv
);
1422 if (!strcmp(base
, "swapoff"))
1423 return main_swapoff(argc
, argv
);
1425 if ((argc
> 1) && !strcmp(base
, "block")) {
1426 if (!strcmp(argv
[1], "info"))
1427 return main_info(argc
, argv
);
1429 if (!strcmp(argv
[1], "detect"))
1430 return main_detect(argc
, argv
);
1432 if (!strcmp(argv
[1], "hotplug"))
1433 return main_hotplug(argc
, argv
);
1435 if (!strcmp(argv
[1], "extroot"))
1436 return main_extroot(argc
, argv
);
1438 if (!strcmp(argv
[1], "mount"))
1439 return main_mount(argc
, argv
);
1441 if (!strcmp(argv
[1], "umount"))
1442 return main_umount(argc
, argv
);
1444 if (!strcmp(argv
[1], "remount")) {
1445 int ret
= main_umount(argc
, argv
);
1448 ret
= main_mount(argc
, argv
);
1453 ULOG_ERR("Usage: block <info|mount|umount|detect>\n");