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>
37 #include <libubox/ulog.h>
38 #include <libubox/list.h>
39 #include <libubox/vlist.h>
40 #include <libubox/blobmsg_json.h>
41 #include <libubox/avl-cmp.h>
43 #include "libblkid-tiny/libblkid-tiny.h"
46 #include "libubi/libubi.h"
55 struct vlist_node node
;
71 static struct vlist_tree mounts
;
72 static struct blob_buf b
;
73 static LIST_HEAD(devices
);
74 static int anon_mount
, anon_swap
, auto_mount
, auto_swap
, check_fs
;
75 static unsigned int delay_root
;
87 static const struct blobmsg_policy config_policy
[__CFG_MAX
] = {
88 [CFG_ANON_SWAP
] = { .name
= "anon_swap", .type
= BLOBMSG_TYPE_INT32
},
89 [CFG_ANON_MOUNT
] = { .name
= "anon_mount", .type
= BLOBMSG_TYPE_INT32
},
90 [CFG_AUTO_SWAP
] = { .name
= "auto_swap", .type
= BLOBMSG_TYPE_INT32
},
91 [CFG_AUTO_MOUNT
] = { .name
= "auto_mount", .type
= BLOBMSG_TYPE_INT32
},
92 [CFG_DELAY_ROOT
] = { .name
= "delay_root", .type
= BLOBMSG_TYPE_INT32
},
93 [CFG_CHECK_FS
] = { .name
= "check_fs", .type
= BLOBMSG_TYPE_INT32
},
106 static const struct uci_blob_param_list config_attr_list
= {
107 .n_params
= __CFG_MAX
,
108 .params
= config_policy
,
111 static const struct blobmsg_policy mount_policy
[__MOUNT_MAX
] = {
112 [MOUNT_UUID
] = { .name
= "uuid", .type
= BLOBMSG_TYPE_STRING
},
113 [MOUNT_LABEL
] = { .name
= "label", .type
= BLOBMSG_TYPE_STRING
},
114 [MOUNT_DEVICE
] = { .name
= "device", .type
= BLOBMSG_TYPE_STRING
},
115 [MOUNT_TARGET
] = { .name
= "target", .type
= BLOBMSG_TYPE_STRING
},
116 [MOUNT_OPTIONS
] = { .name
= "options", .type
= BLOBMSG_TYPE_STRING
},
117 [MOUNT_ENABLE
] = { .name
= "enabled", .type
= BLOBMSG_TYPE_INT32
},
120 static const struct uci_blob_param_list mount_attr_list
= {
121 .n_params
= __MOUNT_MAX
,
122 .params
= mount_policy
,
134 static const struct blobmsg_policy swap_policy
[__SWAP_MAX
] = {
135 [SWAP_ENABLE
] = { .name
= "enabled", .type
= BLOBMSG_TYPE_INT32
},
136 [SWAP_UUID
] = { .name
= "uuid", .type
= BLOBMSG_TYPE_STRING
},
137 [SWAP_LABEL
] = { .name
= "label", .type
= BLOBMSG_TYPE_STRING
},
138 [SWAP_DEVICE
] = { .name
= "device", .type
= BLOBMSG_TYPE_STRING
},
139 [SWAP_PRIO
] = { .name
= "priority", .type
= BLOBMSG_TYPE_INT32
},
142 static const struct uci_blob_param_list swap_attr_list
= {
143 .n_params
= __SWAP_MAX
,
144 .params
= swap_policy
,
152 static const struct mount_flag mount_flags
[] = {
153 { "sync", MS_SYNCHRONOUS
},
154 { "async", ~MS_SYNCHRONOUS
},
155 { "dirsync", MS_DIRSYNC
},
156 { "mand", MS_MANDLOCK
},
157 { "nomand", ~MS_MANDLOCK
},
158 { "atime", ~MS_NOATIME
},
159 { "noatime", MS_NOATIME
},
160 { "dev", ~MS_NODEV
},
161 { "nodev", MS_NODEV
},
162 { "diratime", ~MS_NODIRATIME
},
163 { "nodiratime", MS_NODIRATIME
},
164 { "exec", ~MS_NOEXEC
},
165 { "noexec", MS_NOEXEC
},
166 { "suid", ~MS_NOSUID
},
167 { "nosuid", MS_NOSUID
},
168 { "rw", ~MS_RDONLY
},
170 { "relatime", MS_RELATIME
},
171 { "norelatime", ~MS_RELATIME
},
172 { "strictatime", MS_STRICTATIME
},
175 static char *blobmsg_get_strdup(struct blob_attr
*attr
)
180 return strdup(blobmsg_get_string(attr
));
183 static char *blobmsg_get_basename(struct blob_attr
*attr
)
188 return strdup(basename(blobmsg_get_string(attr
)));
191 static void parse_mount_options(struct mount
*m
, char *optstr
)
195 char *p
, *opts
, *last
;
200 if (!optstr
|| !*optstr
)
203 m
->options
= opts
= calloc(1, strlen(optstr
) + 1);
216 for (i
= 0, is_flag
= false; i
< ARRAY_SIZE(mount_flags
); i
++) {
217 if (!strcmp(last
, mount_flags
[i
].name
)) {
218 if (mount_flags
[i
].flag
< 0)
219 m
->flags
&= (uint32_t)mount_flags
[i
].flag
;
221 m
->flags
|= (uint32_t)mount_flags
[i
].flag
;
228 opts
+= sprintf(opts
, "%s%s", (opts
> m
->options
) ? "," : "", last
);
237 static int mount_add(struct uci_section
*s
)
239 struct blob_attr
*tb
[__MOUNT_MAX
] = { 0 };
242 blob_buf_init(&b
, 0);
243 uci_to_blob(&b
, s
, &mount_attr_list
);
244 blobmsg_parse(mount_policy
, __MOUNT_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
246 if (!tb
[MOUNT_LABEL
] && !tb
[MOUNT_UUID
] && !tb
[MOUNT_DEVICE
])
249 if (tb
[MOUNT_ENABLE
] && !blobmsg_get_u32(tb
[MOUNT_ENABLE
]))
252 m
= malloc(sizeof(struct mount
));
253 m
->type
= TYPE_MOUNT
;
254 m
->uuid
= blobmsg_get_strdup(tb
[MOUNT_UUID
]);
255 m
->label
= blobmsg_get_strdup(tb
[MOUNT_LABEL
]);
256 m
->target
= blobmsg_get_strdup(tb
[MOUNT_TARGET
]);
257 m
->device
= blobmsg_get_basename(tb
[MOUNT_DEVICE
]);
259 parse_mount_options(m
, blobmsg_get_strdup(tb
[MOUNT_OPTIONS
]));
261 m
->overlay
= m
->extroot
= 0;
262 if (m
->target
&& !strcmp(m
->target
, "/"))
264 if (m
->target
&& !strcmp(m
->target
, "/overlay"))
265 m
->extroot
= m
->overlay
= 1;
267 if (m
->target
&& *m
->target
!= '/') {
268 ULOG_WARN("ignoring mount section %s due to invalid target '%s'\n",
269 s
->e
.name
, m
->target
);
275 vlist_add(&mounts
, &m
->node
, m
->uuid
);
277 vlist_add(&mounts
, &m
->node
, m
->label
);
279 vlist_add(&mounts
, &m
->node
, m
->device
);
284 static int swap_add(struct uci_section
*s
)
286 struct blob_attr
*tb
[__SWAP_MAX
] = { 0 };
289 blob_buf_init(&b
, 0);
290 uci_to_blob(&b
, s
, &swap_attr_list
);
291 blobmsg_parse(swap_policy
, __SWAP_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
293 if (!tb
[SWAP_UUID
] && !tb
[SWAP_LABEL
] && !tb
[SWAP_DEVICE
])
296 m
= malloc(sizeof(struct mount
));
297 memset(m
, 0, sizeof(struct mount
));
299 m
->uuid
= blobmsg_get_strdup(tb
[SWAP_UUID
]);
300 m
->label
= blobmsg_get_strdup(tb
[SWAP_LABEL
]);
301 m
->device
= blobmsg_get_basename(tb
[SWAP_DEVICE
]);
303 m
->prio
= blobmsg_get_u32(tb
[SWAP_PRIO
]);
305 m
->prio
= ((m
->prio
<< SWAP_FLAG_PRIO_SHIFT
) & SWAP_FLAG_PRIO_MASK
) | SWAP_FLAG_PREFER
;
307 if ((!tb
[SWAP_ENABLE
]) || blobmsg_get_u32(tb
[SWAP_ENABLE
])) {
308 /* store complete swap path */
310 m
->target
= blobmsg_get_strdup(tb
[SWAP_DEVICE
]);
313 vlist_add(&mounts
, &m
->node
, m
->uuid
);
315 vlist_add(&mounts
, &m
->node
, m
->label
);
317 vlist_add(&mounts
, &m
->node
, m
->device
);
323 static int global_add(struct uci_section
*s
)
325 struct blob_attr
*tb
[__CFG_MAX
] = { 0 };
327 blob_buf_init(&b
, 0);
328 uci_to_blob(&b
, s
, &config_attr_list
);
329 blobmsg_parse(config_policy
, __CFG_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
331 if ((tb
[CFG_ANON_MOUNT
]) && blobmsg_get_u32(tb
[CFG_ANON_MOUNT
]))
333 if ((tb
[CFG_ANON_SWAP
]) && blobmsg_get_u32(tb
[CFG_ANON_SWAP
]))
336 if ((tb
[CFG_AUTO_MOUNT
]) && blobmsg_get_u32(tb
[CFG_AUTO_MOUNT
]))
338 if ((tb
[CFG_AUTO_SWAP
]) && blobmsg_get_u32(tb
[CFG_AUTO_SWAP
]))
341 if (tb
[CFG_DELAY_ROOT
])
342 delay_root
= blobmsg_get_u32(tb
[CFG_DELAY_ROOT
]);
344 if ((tb
[CFG_CHECK_FS
]) && blobmsg_get_u32(tb
[CFG_CHECK_FS
]))
350 static struct mount
* find_swap(const char *uuid
, const char *label
, const char *device
)
354 vlist_for_each_element(&mounts
, m
, node
) {
355 if (m
->type
!= TYPE_SWAP
)
357 if (uuid
&& m
->uuid
&& !strcasecmp(m
->uuid
, uuid
))
359 if (label
&& m
->label
&& !strcmp(m
->label
, label
))
361 if (device
&& m
->device
&& !strcmp(m
->device
, device
))
368 static struct mount
* find_block(const char *uuid
, const char *label
, const char *device
,
373 vlist_for_each_element(&mounts
, m
, node
) {
374 if (m
->type
!= TYPE_MOUNT
)
376 if (m
->uuid
&& uuid
&& !strcasecmp(m
->uuid
, uuid
))
378 if (m
->label
&& label
&& !strcmp(m
->label
, label
))
380 if (m
->target
&& target
&& !strcmp(m
->target
, target
))
382 if (m
->device
&& device
&& !strcmp(m
->device
, device
))
389 static void mounts_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
390 struct vlist_node
*node_old
)
394 static struct uci_package
* config_try_load(struct uci_context
*ctx
, char *path
)
396 char *file
= basename(path
);
397 char *dir
= dirname(path
);
399 struct uci_package
*pkg
;
401 uci_set_confdir(ctx
, dir
);
402 ULOG_INFO("attempting to load %s/%s\n", dir
, file
);
404 if (uci_load(ctx
, file
, &pkg
)) {
405 uci_get_errorstr(ctx
, &err
, file
);
406 ULOG_ERR("unable to load configuration (%s)\n", err
);
415 static int config_load(char *cfg
)
417 struct uci_context
*ctx
= uci_alloc_context();
418 struct uci_package
*pkg
= NULL
;
419 struct uci_element
*e
;
422 vlist_init(&mounts
, avl_strcmp
, mounts_update
);
425 snprintf(path
, sizeof(path
), "%s/upper/etc/config/fstab", cfg
);
426 pkg
= config_try_load(ctx
, path
);
429 snprintf(path
, sizeof(path
), "%s/etc/config/fstab", cfg
);
430 pkg
= config_try_load(ctx
, path
);
435 snprintf(path
, sizeof(path
), "/etc/config/fstab");
436 pkg
= config_try_load(ctx
, path
);
440 ULOG_ERR("no usable configuration\n");
444 vlist_update(&mounts
);
445 uci_foreach_element(&pkg
->sections
, e
) {
446 struct uci_section
*s
= uci_to_section(e
);
448 if (!strcmp(s
->type
, "mount"))
450 if (!strcmp(s
->type
, "swap"))
452 if (!strcmp(s
->type
, "global"))
455 vlist_flush(&mounts
);
460 static struct blkid_struct_probe
* _probe_path(char *path
)
462 struct blkid_struct_probe
*pr
;
464 pr
= malloc(sizeof(*pr
));
469 memset(pr
, 0, sizeof(*pr
));
470 probe_block(path
, pr
);
472 if (pr
->err
|| !pr
->id
) {
480 static int _cache_load(const char *path
)
482 int gl_flags
= GLOB_NOESCAPE
| GLOB_MARK
;
486 if (glob(path
, gl_flags
, NULL
, &gl
) < 0)
489 for (j
= 0; j
< gl
.gl_pathc
; j
++) {
490 struct blkid_struct_probe
*pr
= _probe_path(gl
.gl_pathv
[j
]);
492 list_add_tail(&pr
->list
, &devices
);
500 static void cache_load(int mtd
)
503 _cache_load("/dev/mtdblock*");
504 _cache_load("/dev/ubiblock*");
505 _cache_load("/dev/ubi?*_?*");
507 _cache_load("/dev/mmcblk*");
508 _cache_load("/dev/sd*");
509 _cache_load("/dev/hd*");
510 _cache_load("/dev/md*");
511 _cache_load("/dev/vd*");
512 _cache_load("/dev/mapper/*");
515 static int print_block_info(struct blkid_struct_probe
*pr
)
517 printf("%s:", pr
->dev
);
519 printf(" UUID=\"%s\"", pr
->uuid
);
522 printf(" LABEL=\"%s\"", pr
->label
);
525 printf(" NAME=\"%s\"", pr
->name
);
528 printf(" VERSION=\"%s\"", pr
->version
);
530 printf(" TYPE=\"%s\"\n", pr
->id
->name
);
535 static int print_block_uci(struct blkid_struct_probe
*pr
)
537 if (!strcmp(pr
->id
->name
, "swap")) {
538 printf("config 'swap'\n");
540 printf("config 'mount'\n");
541 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr
->dev
));
544 printf("\toption\tuuid\t'%s'\n", pr
->uuid
);
546 printf("\toption\tdevice\t'%s'\n", pr
->dev
);
547 printf("\toption\tenabled\t'0'\n\n");
552 static struct blkid_struct_probe
* find_block_info(char *uuid
, char *label
, char *path
)
554 struct blkid_struct_probe
*pr
= NULL
;
557 list_for_each_entry(pr
, &devices
, list
)
558 if (!strcasecmp(pr
->uuid
, uuid
))
562 list_for_each_entry(pr
, &devices
, list
)
563 if (!strcmp(pr
->label
, label
))
567 list_for_each_entry(pr
, &devices
, list
)
568 if (!strcmp(basename(pr
->dev
), basename(path
)))
574 static char* find_mount_point(char *block
)
576 FILE *fp
= fopen("/proc/mounts", "r");
577 static char line
[256];
578 int len
= strlen(block
);
584 while (fgets(line
, sizeof(line
), fp
)) {
585 if (!strncmp(line
, block
, len
)) {
586 char *p
= &line
[len
+ 1];
587 char *t
= strstr(p
, " ");
604 static void mkdir_p(char *dir
)
606 char *l
= strrchr(dir
, '/');
616 static void check_filesystem(struct blkid_struct_probe
*pr
)
620 const char *e2fsck
= "/usr/sbin/e2fsck";
621 const char *dosfsck
= "/usr/sbin/dosfsck";
624 /* UBIFS does not need stuff like fsck */
625 if (!strncmp(pr
->id
->name
, "ubifs", 5))
628 if (!strncmp(pr
->id
->name
, "vfat", 4)) {
630 } else if (!strncmp(pr
->id
->name
, "ext", 3)) {
633 ULOG_ERR("check_filesystem: %s is not supported\n", pr
->id
->name
);
637 if (stat(ckfs
, &statbuf
) < 0) {
638 ULOG_ERR("check_filesystem: %s not found\n", ckfs
);
644 execl(ckfs
, ckfs
, "-p", pr
->dev
, NULL
);
646 } else if (pid
> 0) {
649 waitpid(pid
, &status
, 0);
650 if (WEXITSTATUS(status
))
651 ULOG_ERR("check_filesystem: %s returned %d\n", ckfs
, WEXITSTATUS(status
));
655 static void handle_swapfiles(bool on
)
659 struct blkid_struct_probe
*pr
;
661 vlist_for_each_element(&mounts
, m
, node
)
663 if (m
->type
!= TYPE_SWAP
|| !m
->target
)
666 if (stat(m
->target
, &s
) || !S_ISREG(s
.st_mode
))
669 pr
= _probe_path(m
->target
);
674 if (!strcmp(pr
->id
->name
, "swap")) {
676 swapon(pr
->dev
, m
->prio
);
685 static int mount_device(struct blkid_struct_probe
*pr
, int hotplug
)
693 device
= basename(pr
->dev
);
695 if (!strcmp(pr
->id
->name
, "swap")) {
696 if (hotplug
&& !auto_swap
)
698 m
= find_swap(pr
->uuid
, pr
->label
, device
);
700 swapon(pr
->dev
, (m
) ? (m
->prio
) : (0));
705 if (hotplug
&& !auto_mount
)
708 if (find_mount_point(pr
->dev
)) {
709 ULOG_ERR("%s is already mounted\n", pr
->dev
);
713 m
= find_block(pr
->uuid
, pr
->label
, device
, NULL
);
718 char *target
= m
->target
;
723 snprintf(_target
, sizeof(_target
), "/mnt/%s", device
);
729 check_filesystem(pr
);
731 err
= mount(pr
->dev
, target
, pr
->id
->name
, m
->flags
,
732 (m
->options
) ? (m
->options
) : (""));
734 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %s\n",
735 pr
->dev
, pr
->id
->name
, target
, err
, strerror(err
));
737 handle_swapfiles(true);
742 char target
[] = "/mnt/mmcblk123";
745 snprintf(target
, sizeof(target
), "/mnt/%s", device
);
749 check_filesystem(pr
);
751 err
= mount(pr
->dev
, target
, pr
->id
->name
, 0, "");
753 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %s\n",
754 pr
->dev
, pr
->id
->name
, target
, err
, strerror(err
));
756 handle_swapfiles(true);
763 static int umount_device(struct blkid_struct_probe
*pr
)
766 char *device
= basename(pr
->dev
);
773 if (!strcmp(pr
->id
->name
, "swap"))
776 mp
= find_mount_point(pr
->dev
);
780 m
= find_block(pr
->uuid
, pr
->label
, device
, NULL
);
784 err
= umount2(mp
, MNT_DETACH
);
786 ULOG_ERR("unmounting %s (%s) failed (%d) - %s\n",
787 pr
->dev
, mp
, err
, strerror(err
));
789 ULOG_INFO("unmounted %s (%s)\n",
795 static int main_hotplug(int argc
, char **argv
)
798 char *action
, *device
, *mount_point
;
800 action
= getenv("ACTION");
801 device
= getenv("DEVNAME");
803 if (!action
|| !device
)
805 snprintf(path
, sizeof(path
), "/dev/%s", device
);
807 if (!strcmp(action
, "remove")) {
809 mount_point
= find_mount_point(path
);
811 err
= umount2(mount_point
, MNT_DETACH
);
814 ULOG_ERR("umount of %s failed (%d) - %s\n",
815 mount_point
, err
, strerror(err
));
818 } else if (strcmp(action
, "add")) {
819 ULOG_ERR("Unkown action %s\n", action
);
824 if (config_load(NULL
))
828 return mount_device(find_block_info(NULL
, NULL
, path
), 1);
831 static int find_block_mtd(char *name
, char *part
, int plen
)
833 FILE *fp
= fopen("/proc/mtd", "r");
834 static char line
[256];
840 while (!index
&& fgets(line
, sizeof(line
), fp
)) {
841 if (strstr(line
, name
)) {
842 char *eol
= strstr(line
, ":");
857 snprintf(part
, plen
, "/dev/mtdblock%s", index
);
863 static int find_ubi_vol(libubi_t libubi
, char *name
, int *dev_num
, int *vol_id
)
867 while (ubi_dev_present(libubi
, dev
))
869 struct ubi_dev_info dev_info
;
870 struct ubi_vol_info vol_info
;
872 if (ubi_get_dev_info1(libubi
, dev
++, &dev_info
))
874 if (ubi_get_vol_info1_nm(libubi
, dev_info
.dev_num
, name
, &vol_info
))
877 *dev_num
= dev_info
.dev_num
;
878 *vol_id
= vol_info
.vol_id
;
886 static int find_block_ubi(libubi_t libubi
, char *name
, char *part
, int plen
)
892 err
= find_ubi_vol(libubi
, name
, &dev_num
, &vol_id
);
894 snprintf(part
, plen
, "/dev/ubi%d_%d", dev_num
, vol_id
);
899 static int find_block_ubi_RO(libubi_t libubi
, char *name
, char *part
, int plen
)
905 err
= find_ubi_vol(libubi
, name
, &dev_num
, &vol_id
);
907 snprintf(part
, plen
, "/dev/ubiblock%d_%d", dev_num
, vol_id
);
914 static int find_root_dev(char *buf
, int len
)
924 if (!(d
= opendir("/dev")))
929 while ((e
= readdir(d
)) != NULL
) {
930 snprintf(buf
, len
, "/dev/%s", e
->d_name
);
932 if (stat(buf
, &s
) || s
.st_rdev
!= root
)
945 static int test_fs_support(const char *name
)
951 if ((f
= fopen("/proc/filesystems", "r")) != NULL
) {
952 while (fgets(line
, sizeof(line
), f
)) {
953 p
= strtok(line
, "\t\n");
955 if (p
&& !strcmp(p
, "nodev"))
956 p
= strtok(NULL
, "\t\n");
958 if (p
&& !strcmp(p
, name
)) {
969 static int check_extroot(char *path
)
971 struct blkid_struct_probe
*pr
= NULL
;
975 if (find_block_mtd("\"rootfs\"", devpath
, sizeof(devpath
))) {
979 libubi
= libubi_open();
980 err
= find_block_ubi_RO(libubi
, "rootfs", devpath
, sizeof(devpath
));
981 libubi_close(libubi
);
986 if (find_block_mtd("\"rootfs\"", devpath
, sizeof(devpath
))) {
987 if (find_root_dev(devpath
, sizeof(devpath
))) {
988 ULOG_ERR("extroot: unable to determine root device\n");
994 list_for_each_entry(pr
, &devices
, list
) {
995 if (!strcmp(pr
->dev
, devpath
)) {
999 char uuid
[64] = { 0 };
1001 snprintf(tag
, sizeof(tag
), "%s/etc", path
);
1005 snprintf(tag
, sizeof(tag
), "%s/etc/.extroot-uuid", path
);
1006 if (stat(tag
, &s
)) {
1007 fp
= fopen(tag
, "w+");
1009 ULOG_ERR("extroot: failed to write UUID to %s: %d (%s)\n",
1010 tag
, errno
, strerror(errno
));
1011 /* return 0 to continue boot regardless of error */
1014 fputs(pr
->uuid
, fp
);
1019 fp
= fopen(tag
, "r");
1021 ULOG_ERR("extroot: failed to read UUID from %s: %d (%s)\n",
1022 tag
, errno
, strerror(errno
));
1026 if (!fgets(uuid
, sizeof(uuid
), fp
))
1027 ULOG_ERR("extroot: failed to read UUID from %s: %d (%s)\n",
1028 tag
, errno
, strerror(errno
));
1031 if (*uuid
|| !strcasecmp(uuid
, pr
->uuid
))
1034 ULOG_ERR("extroot: UUID mismatch (root: %s, %s: %s)\n",
1035 pr
->uuid
, basename(path
), uuid
);
1040 ULOG_ERR("extroot: unable to lookup root device %s\n", devpath
);
1045 * Read info about extroot from UCI (using prefix) and mount it.
1047 static int mount_extroot(char *cfg
)
1049 char overlay
[] = "/tmp/extroot/overlay";
1050 char mnt
[] = "/tmp/extroot/mnt";
1052 struct blkid_struct_probe
*pr
;
1056 /* Load @cfg/etc/config/fstab */
1057 if (config_load(cfg
))
1060 /* See if there is extroot-specific mount config */
1061 m
= find_block(NULL
, NULL
, NULL
, "/");
1063 m
= find_block(NULL
, NULL
, NULL
, "/overlay");
1065 if (!m
|| !m
->extroot
)
1067 ULOG_INFO("extroot: not configured\n");
1071 /* Find block device pointed by the mount config */
1072 pr
= find_block_info(m
->uuid
, m
->label
, m
->device
);
1074 if (!pr
&& delay_root
){
1075 ULOG_INFO("extroot: device not present, retrying in %u seconds\n", delay_root
);
1079 pr
= find_block_info(m
->uuid
, m
->label
, m
->device
);
1082 if (strncmp(pr
->id
->name
, "ext", 3) &&
1083 strncmp(pr
->id
->name
, "ubifs", 5)) {
1084 ULOG_ERR("extroot: unsupported filesystem %s, try ext4\n", pr
->id
->name
);
1088 if (test_fs_support(pr
->id
->name
)) {
1089 ULOG_ERR("extroot: filesystem %s not supported by kernel\n", pr
->id
->name
);
1098 check_filesystem(pr
);
1100 err
= mount(pr
->dev
, path
, pr
->id
->name
, m
->flags
,
1101 (m
->options
) ? (m
->options
) : (""));
1104 ULOG_ERR("extroot: mounting %s (%s) on %s failed: %d (%s)\n",
1105 pr
->dev
, pr
->id
->name
, path
, err
, strerror(err
));
1106 } else if (m
->overlay
) {
1107 err
= check_extroot(path
);
1112 ULOG_ERR("extroot: cannot find device %s%s\n",
1113 (m
->uuid
? "with UUID " : (m
->label
? "with label " : "")),
1114 (m
->uuid
? m
->uuid
: (m
->label
? m
->label
: m
->device
)));
1120 static int main_extroot(int argc
, char **argv
)
1122 struct blkid_struct_probe
*pr
;
1123 char blkdev_path
[32] = { 0 };
1125 #ifdef UBIFS_EXTROOT
1129 if (!getenv("PREINIT"))
1133 ULOG_ERR("Usage: block extroot\n");
1140 /* enable LOG_INFO messages */
1141 ulog_threshold(LOG_INFO
);
1144 * Look for "rootfs_data". We will want to mount it and check for
1145 * extroot configuration.
1148 /* Start with looking for MTD partition */
1149 find_block_mtd("\"rootfs_data\"", blkdev_path
, sizeof(blkdev_path
));
1150 if (blkdev_path
[0]) {
1151 pr
= find_block_info(NULL
, NULL
, blkdev_path
);
1152 if (pr
&& !strcmp(pr
->id
->name
, "jffs2")) {
1153 char cfg
[] = "/tmp/jffs_cfg";
1156 * Mount MTD part and try extroot (using
1157 * /etc/config/fstab from that partition)
1160 if (!mount(blkdev_path
, cfg
, "jffs2", MS_NOATIME
, NULL
)) {
1161 err
= mount_extroot(cfg
);
1162 umount2(cfg
, MNT_DETACH
);
1165 rmdir("/tmp/overlay");
1171 #ifdef UBIFS_EXTROOT
1172 /* ... but it also could be an UBI volume */
1173 memset(blkdev_path
, 0, sizeof(blkdev_path
));
1174 libubi
= libubi_open();
1175 find_block_ubi(libubi
, "rootfs_data", blkdev_path
, sizeof(blkdev_path
));
1176 libubi_close(libubi
);
1177 if (blkdev_path
[0]) {
1178 char cfg
[] = "/tmp/ubifs_cfg";
1180 /* Mount volume and try extroot (using fstab from that vol) */
1182 if (!mount(blkdev_path
, cfg
, "ubifs", MS_NOATIME
, NULL
)) {
1183 err
= mount_extroot(cfg
);
1184 umount2(cfg
, MNT_DETACH
);
1187 rmdir("/tmp/overlay");
1193 return mount_extroot(NULL
);
1196 static int main_mount(int argc
, char **argv
)
1198 struct blkid_struct_probe
*pr
;
1200 if (config_load(NULL
))
1204 list_for_each_entry(pr
, &devices
, list
)
1205 mount_device(pr
, 0);
1207 handle_swapfiles(true);
1212 static int main_umount(int argc
, char **argv
)
1214 struct blkid_struct_probe
*pr
;
1216 if (config_load(NULL
))
1219 handle_swapfiles(false);
1222 list_for_each_entry(pr
, &devices
, list
)
1228 static int main_detect(int argc
, char **argv
)
1230 struct blkid_struct_probe
*pr
;
1233 printf("config 'global'\n");
1234 printf("\toption\tanon_swap\t'0'\n");
1235 printf("\toption\tanon_mount\t'0'\n");
1236 printf("\toption\tauto_swap\t'1'\n");
1237 printf("\toption\tauto_mount\t'1'\n");
1238 printf("\toption\tdelay_root\t'5'\n");
1239 printf("\toption\tcheck_fs\t'0'\n\n");
1240 list_for_each_entry(pr
, &devices
, list
)
1241 print_block_uci(pr
);
1246 static int main_info(int argc
, char **argv
)
1249 struct blkid_struct_probe
*pr
;
1253 list_for_each_entry(pr
, &devices
, list
)
1254 print_block_info(pr
);
1259 for (i
= 2; i
< argc
; i
++) {
1262 if (stat(argv
[i
], &s
)) {
1263 ULOG_ERR("failed to stat %s\n", argv
[i
]);
1266 if (!S_ISBLK(s
.st_mode
)) {
1267 ULOG_ERR("%s is not a block device\n", argv
[i
]);
1270 pr
= find_block_info(NULL
, NULL
, argv
[i
]);
1272 print_block_info(pr
);
1278 static int swapon_usage(void)
1280 fprintf(stderr
, "Usage: swapon [-s] [-a] [[-p pri] DEVICE]\n\n"
1281 "\tStart swapping on [DEVICE]\n"
1282 " -a\tStart swapping on all swap devices\n"
1283 " -p pri\tSet priority of swap device\n"
1284 " -s\tShow summary\n");
1288 static int main_swapon(int argc
, char **argv
)
1294 struct blkid_struct_probe
*pr
;
1300 while ((ch
= getopt(argc
, argv
, "ap:s")) != -1) {
1303 fp
= fopen("/proc/swaps", "r");
1307 ULOG_ERR("failed to open /proc/swaps\n");
1310 while (getline(&lineptr
, &s
, fp
) > 0)
1311 printf("%s", lineptr
);
1318 list_for_each_entry(pr
, &devices
, list
) {
1319 if (strcmp(pr
->id
->name
, "swap"))
1321 if (swapon(pr
->dev
, 0))
1322 ULOG_ERR("failed to swapon %s\n", pr
->dev
);
1328 flags
= ((pri
<< SWAP_FLAG_PRIO_SHIFT
) & SWAP_FLAG_PRIO_MASK
) | SWAP_FLAG_PREFER
;
1331 return swapon_usage();
1336 if (optind
!= (argc
- 1))
1337 return swapon_usage();
1339 if (stat(argv
[optind
], &st
) || (!S_ISBLK(st
.st_mode
) && !S_ISREG(st
.st_mode
))) {
1340 ULOG_ERR("%s is not a block device or file\n", argv
[optind
]);
1343 err
= swapon(argv
[optind
], flags
);
1345 ULOG_ERR("failed to swapon %s (%d)\n", argv
[optind
], err
);
1352 static int main_swapoff(int argc
, char **argv
)
1355 ULOG_ERR("Usage: swapoff [-a] [DEVICE]\n\n"
1356 "\tStop swapping on DEVICE\n"
1357 " -a\tStop swapping on all swap devices\n");
1361 if (!strcmp(argv
[1], "-a")) {
1362 FILE *fp
= fopen("/proc/swaps", "r");
1366 ULOG_ERR("failed to open /proc/swaps\n");
1369 if (fgets(line
, sizeof(line
), fp
))
1370 while (fgets(line
, sizeof(line
), fp
)) {
1371 char *end
= strchr(line
, ' ');
1377 err
= swapoff(line
);
1379 ULOG_ERR("failed to swapoff %s (%d)\n", line
, err
);
1386 if (stat(argv
[1], &s
) || (!S_ISBLK(s
.st_mode
) && !S_ISREG(s
.st_mode
))) {
1387 ULOG_ERR("%s is not a block device or file\n", argv
[1]);
1390 err
= swapoff(argv
[1]);
1392 ULOG_ERR("failed to swapoff %s (%d)\n", argv
[1], err
);
1400 int main(int argc
, char **argv
)
1402 char *base
= basename(*argv
);
1406 ulog_open(-1, -1, "block");
1407 ulog_threshold(LOG_NOTICE
);
1409 if (!strcmp(base
, "swapon"))
1410 return main_swapon(argc
, argv
);
1412 if (!strcmp(base
, "swapoff"))
1413 return main_swapoff(argc
, argv
);
1415 if ((argc
> 1) && !strcmp(base
, "block")) {
1416 if (!strcmp(argv
[1], "info"))
1417 return main_info(argc
, argv
);
1419 if (!strcmp(argv
[1], "detect"))
1420 return main_detect(argc
, argv
);
1422 if (!strcmp(argv
[1], "hotplug"))
1423 return main_hotplug(argc
, argv
);
1425 if (!strcmp(argv
[1], "extroot"))
1426 return main_extroot(argc
, argv
);
1428 if (!strcmp(argv
[1], "mount"))
1429 return main_mount(argc
, argv
);
1431 if (!strcmp(argv
[1], "umount"))
1432 return main_umount(argc
, argv
);
1434 if (!strcmp(argv
[1], "remount")) {
1435 int ret
= main_umount(argc
, argv
);
1438 ret
= main_mount(argc
, argv
);
1443 ULOG_ERR("Usage: block <info|mount|umount|detect>\n");