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
},
173 { "acl", MS_POSIXACL
},
174 { "noacl", ~MS_POSIXACL
},
175 { "nouser_xattr", MS_NOUSER
},
176 { "user_xattr", ~MS_NOUSER
},
179 static char *blobmsg_get_strdup(struct blob_attr
*attr
)
184 return strdup(blobmsg_get_string(attr
));
187 static char *blobmsg_get_basename(struct blob_attr
*attr
)
192 return strdup(basename(blobmsg_get_string(attr
)));
195 static void parse_mount_options(struct mount
*m
, char *optstr
)
199 char *p
, *opts
, *last
;
204 if (!optstr
|| !*optstr
)
207 m
->options
= opts
= calloc(1, strlen(optstr
) + 1);
220 for (i
= 0, is_flag
= false; i
< ARRAY_SIZE(mount_flags
); i
++) {
221 if (!strcmp(last
, mount_flags
[i
].name
)) {
222 if (mount_flags
[i
].flag
< 0)
223 m
->flags
&= (uint32_t)mount_flags
[i
].flag
;
225 m
->flags
|= (uint32_t)mount_flags
[i
].flag
;
232 opts
+= sprintf(opts
, "%s%s", (opts
> m
->options
) ? "," : "", last
);
241 static int mount_add(struct uci_section
*s
)
243 struct blob_attr
*tb
[__MOUNT_MAX
] = { 0 };
246 blob_buf_init(&b
, 0);
247 uci_to_blob(&b
, s
, &mount_attr_list
);
248 blobmsg_parse(mount_policy
, __MOUNT_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
250 if (!tb
[MOUNT_LABEL
] && !tb
[MOUNT_UUID
] && !tb
[MOUNT_DEVICE
])
253 if (tb
[MOUNT_ENABLE
] && !blobmsg_get_u32(tb
[MOUNT_ENABLE
]))
256 m
= malloc(sizeof(struct mount
));
257 m
->type
= TYPE_MOUNT
;
258 m
->uuid
= blobmsg_get_strdup(tb
[MOUNT_UUID
]);
259 m
->label
= blobmsg_get_strdup(tb
[MOUNT_LABEL
]);
260 m
->target
= blobmsg_get_strdup(tb
[MOUNT_TARGET
]);
261 m
->device
= blobmsg_get_basename(tb
[MOUNT_DEVICE
]);
263 parse_mount_options(m
, blobmsg_get_strdup(tb
[MOUNT_OPTIONS
]));
265 m
->overlay
= m
->extroot
= 0;
266 if (m
->target
&& !strcmp(m
->target
, "/"))
268 if (m
->target
&& !strcmp(m
->target
, "/overlay"))
269 m
->extroot
= m
->overlay
= 1;
271 if (m
->target
&& *m
->target
!= '/') {
272 ULOG_WARN("ignoring mount section %s due to invalid target '%s'\n",
273 s
->e
.name
, m
->target
);
279 vlist_add(&mounts
, &m
->node
, m
->uuid
);
281 vlist_add(&mounts
, &m
->node
, m
->label
);
283 vlist_add(&mounts
, &m
->node
, m
->device
);
288 static int swap_add(struct uci_section
*s
)
290 struct blob_attr
*tb
[__SWAP_MAX
] = { 0 };
293 blob_buf_init(&b
, 0);
294 uci_to_blob(&b
, s
, &swap_attr_list
);
295 blobmsg_parse(swap_policy
, __SWAP_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
297 if (!tb
[SWAP_UUID
] && !tb
[SWAP_LABEL
] && !tb
[SWAP_DEVICE
])
300 m
= malloc(sizeof(struct mount
));
301 memset(m
, 0, sizeof(struct mount
));
303 m
->uuid
= blobmsg_get_strdup(tb
[SWAP_UUID
]);
304 m
->label
= blobmsg_get_strdup(tb
[SWAP_LABEL
]);
305 m
->device
= blobmsg_get_basename(tb
[SWAP_DEVICE
]);
307 m
->prio
= blobmsg_get_u32(tb
[SWAP_PRIO
]);
309 m
->prio
= ((m
->prio
<< SWAP_FLAG_PRIO_SHIFT
) & SWAP_FLAG_PRIO_MASK
) | SWAP_FLAG_PREFER
;
311 if ((!tb
[SWAP_ENABLE
]) || blobmsg_get_u32(tb
[SWAP_ENABLE
])) {
312 /* store complete swap path */
314 m
->target
= blobmsg_get_strdup(tb
[SWAP_DEVICE
]);
317 vlist_add(&mounts
, &m
->node
, m
->uuid
);
319 vlist_add(&mounts
, &m
->node
, m
->label
);
321 vlist_add(&mounts
, &m
->node
, m
->device
);
327 static int global_add(struct uci_section
*s
)
329 struct blob_attr
*tb
[__CFG_MAX
] = { 0 };
331 blob_buf_init(&b
, 0);
332 uci_to_blob(&b
, s
, &config_attr_list
);
333 blobmsg_parse(config_policy
, __CFG_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
335 if ((tb
[CFG_ANON_MOUNT
]) && blobmsg_get_u32(tb
[CFG_ANON_MOUNT
]))
337 if ((tb
[CFG_ANON_SWAP
]) && blobmsg_get_u32(tb
[CFG_ANON_SWAP
]))
340 if ((tb
[CFG_AUTO_MOUNT
]) && blobmsg_get_u32(tb
[CFG_AUTO_MOUNT
]))
342 if ((tb
[CFG_AUTO_SWAP
]) && blobmsg_get_u32(tb
[CFG_AUTO_SWAP
]))
345 if (tb
[CFG_DELAY_ROOT
])
346 delay_root
= blobmsg_get_u32(tb
[CFG_DELAY_ROOT
]);
348 if ((tb
[CFG_CHECK_FS
]) && blobmsg_get_u32(tb
[CFG_CHECK_FS
]))
354 static struct mount
* find_swap(const char *uuid
, const char *label
, const char *device
)
358 vlist_for_each_element(&mounts
, m
, node
) {
359 if (m
->type
!= TYPE_SWAP
)
361 if (uuid
&& m
->uuid
&& !strcasecmp(m
->uuid
, uuid
))
363 if (label
&& m
->label
&& !strcmp(m
->label
, label
))
365 if (device
&& m
->device
&& !strcmp(m
->device
, device
))
372 static struct mount
* find_block(const char *uuid
, const char *label
, const char *device
,
377 vlist_for_each_element(&mounts
, m
, node
) {
378 if (m
->type
!= TYPE_MOUNT
)
380 if (m
->uuid
&& uuid
&& !strcasecmp(m
->uuid
, uuid
))
382 if (m
->label
&& label
&& !strcmp(m
->label
, label
))
384 if (m
->target
&& target
&& !strcmp(m
->target
, target
))
386 if (m
->device
&& device
&& !strcmp(m
->device
, device
))
393 static void mounts_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
394 struct vlist_node
*node_old
)
398 static struct uci_package
* config_try_load(struct uci_context
*ctx
, char *path
)
400 char *file
= basename(path
);
401 char *dir
= dirname(path
);
403 struct uci_package
*pkg
;
405 uci_set_confdir(ctx
, dir
);
406 ULOG_INFO("attempting to load %s/%s\n", dir
, file
);
408 if (uci_load(ctx
, file
, &pkg
)) {
409 uci_get_errorstr(ctx
, &err
, file
);
410 ULOG_ERR("unable to load configuration (%s)\n", err
);
419 static int config_load(char *cfg
)
421 struct uci_context
*ctx
= uci_alloc_context();
422 struct uci_package
*pkg
= NULL
;
423 struct uci_element
*e
;
426 vlist_init(&mounts
, avl_strcmp
, mounts_update
);
429 snprintf(path
, sizeof(path
), "%s/upper/etc/config/fstab", cfg
);
430 pkg
= config_try_load(ctx
, path
);
433 snprintf(path
, sizeof(path
), "%s/etc/config/fstab", cfg
);
434 pkg
= config_try_load(ctx
, path
);
439 snprintf(path
, sizeof(path
), "/etc/config/fstab");
440 pkg
= config_try_load(ctx
, path
);
444 ULOG_ERR("no usable configuration\n");
448 vlist_update(&mounts
);
449 uci_foreach_element(&pkg
->sections
, e
) {
450 struct uci_section
*s
= uci_to_section(e
);
452 if (!strcmp(s
->type
, "mount"))
454 if (!strcmp(s
->type
, "swap"))
456 if (!strcmp(s
->type
, "global"))
459 vlist_flush(&mounts
);
464 static struct blkid_struct_probe
* _probe_path(char *path
)
466 struct blkid_struct_probe
*pr
;
469 /* skip ubi device if ubiblock device is present */
470 if (path
[5] == 'u' && path
[6] == 'b' && path
[7] == 'i' &&
471 path
[8] >= '0' && path
[8] <= '9' ) {
472 snprintf(tmppath
, sizeof(tmppath
), "/dev/ubiblock%s", path
+ 8);
473 list_for_each_entry(pr
, &devices
, list
)
474 if (!strcasecmp(pr
->dev
, tmppath
))
478 pr
= malloc(sizeof(*pr
));
483 memset(pr
, 0, sizeof(*pr
));
484 probe_block(path
, pr
);
486 if (pr
->err
|| !pr
->id
) {
494 static int _cache_load(const char *path
)
496 int gl_flags
= GLOB_NOESCAPE
| GLOB_MARK
;
500 if (glob(path
, gl_flags
, NULL
, &gl
) < 0)
503 for (j
= 0; j
< gl
.gl_pathc
; j
++) {
504 struct blkid_struct_probe
*pr
= _probe_path(gl
.gl_pathv
[j
]);
506 list_add_tail(&pr
->list
, &devices
);
514 static void cache_load(int mtd
)
517 _cache_load("/dev/mtdblock*");
518 _cache_load("/dev/ubiblock*");
519 _cache_load("/dev/ubi[0-9]*");
521 _cache_load("/dev/mmcblk*");
522 _cache_load("/dev/sd*");
523 _cache_load("/dev/hd*");
524 _cache_load("/dev/md*");
525 _cache_load("/dev/vd*");
526 _cache_load("/dev/mapper/*");
529 static int print_block_info(struct blkid_struct_probe
*pr
)
531 printf("%s:", pr
->dev
);
533 printf(" UUID=\"%s\"", pr
->uuid
);
536 printf(" LABEL=\"%s\"", pr
->label
);
539 printf(" NAME=\"%s\"", pr
->name
);
542 printf(" VERSION=\"%s\"", pr
->version
);
544 printf(" TYPE=\"%s\"\n", pr
->id
->name
);
549 static int print_block_uci(struct blkid_struct_probe
*pr
)
551 if (!strcmp(pr
->id
->name
, "swap")) {
552 printf("config 'swap'\n");
554 printf("config 'mount'\n");
555 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr
->dev
));
558 printf("\toption\tuuid\t'%s'\n", pr
->uuid
);
560 printf("\toption\tdevice\t'%s'\n", pr
->dev
);
561 printf("\toption\tenabled\t'0'\n\n");
566 static struct blkid_struct_probe
* find_block_info(char *uuid
, char *label
, char *path
)
568 struct blkid_struct_probe
*pr
= NULL
;
571 list_for_each_entry(pr
, &devices
, list
)
572 if (!strcasecmp(pr
->uuid
, uuid
))
576 list_for_each_entry(pr
, &devices
, list
)
577 if (!strcmp(pr
->label
, label
))
581 list_for_each_entry(pr
, &devices
, list
)
582 if (!strcmp(basename(pr
->dev
), basename(path
)))
588 static char* find_mount_point(char *block
)
590 FILE *fp
= fopen("/proc/self/mountinfo", "r");
591 static char line
[256];
592 int len
= strlen(block
);
593 char *point
= NULL
, *pos
, *tmp
, *cpoint
, *devname
;
596 unsigned int minor
, major
;
601 rstat
= stat(block
, &s
);
603 while (fgets(line
, sizeof(line
), fp
)) {
604 pos
= strchr(line
, ' ');
608 pos
= strchr(pos
+ 1, ' ');
613 pos
= strchr(pos
, ':');
620 pos
= strchr(pos
, ' ');
626 pos
= strchr(pos
+ 1, ' ');
631 pos
= strchr(pos
, ' ');
637 pos
= strchr(pos
+ 1, ' ');
641 pos
= strchr(pos
+ 1, ' ');
645 pos
= strchr(pos
+ 1, ' ');
650 pos
= strchr(pos
, ' ');
656 if (!strncmp(block
, devname
, len
)) {
657 point
= strdup(cpoint
);
664 if (!S_ISBLK(s
.st_mode
))
667 if (major
== major(s
.st_rdev
) &&
668 minor
== minor(s
.st_rdev
)) {
669 point
= strdup(cpoint
);
679 static void mkdir_p(char *dir
)
681 char *l
= strrchr(dir
, '/');
691 static void check_filesystem(struct blkid_struct_probe
*pr
)
695 const char *e2fsck
= "/usr/sbin/e2fsck";
696 const char *dosfsck
= "/usr/sbin/dosfsck";
699 /* UBIFS does not need stuff like fsck */
700 if (!strncmp(pr
->id
->name
, "ubifs", 5))
703 if (!strncmp(pr
->id
->name
, "vfat", 4)) {
705 } else if (!strncmp(pr
->id
->name
, "ext", 3)) {
708 ULOG_ERR("check_filesystem: %s is not supported\n", pr
->id
->name
);
712 if (stat(ckfs
, &statbuf
) < 0) {
713 ULOG_ERR("check_filesystem: %s not found\n", ckfs
);
719 execl(ckfs
, ckfs
, "-p", pr
->dev
, NULL
);
721 } else if (pid
> 0) {
724 waitpid(pid
, &status
, 0);
725 if (WEXITSTATUS(status
))
726 ULOG_ERR("check_filesystem: %s returned %d\n", ckfs
, WEXITSTATUS(status
));
730 static void handle_swapfiles(bool on
)
734 struct blkid_struct_probe
*pr
;
736 vlist_for_each_element(&mounts
, m
, node
)
738 if (m
->type
!= TYPE_SWAP
|| !m
->target
)
741 if (stat(m
->target
, &s
) || !S_ISREG(s
.st_mode
))
744 pr
= _probe_path(m
->target
);
749 if (!strcmp(pr
->id
->name
, "swap")) {
751 swapon(pr
->dev
, m
->prio
);
760 static int mount_device(struct blkid_struct_probe
*pr
, int hotplug
)
769 device
= basename(pr
->dev
);
771 if (!strcmp(pr
->id
->name
, "swap")) {
772 if (hotplug
&& !auto_swap
)
774 m
= find_swap(pr
->uuid
, pr
->label
, device
);
776 swapon(pr
->dev
, (m
) ? (m
->prio
) : (0));
781 if (hotplug
&& !auto_mount
)
784 mp
= find_mount_point(pr
->dev
);
786 ULOG_ERR("%s is already mounted on %s\n", pr
->dev
, mp
);
791 m
= find_block(pr
->uuid
, pr
->label
, device
, NULL
);
796 char *target
= m
->target
;
801 snprintf(_target
, sizeof(_target
), "/mnt/%s", device
);
807 check_filesystem(pr
);
809 err
= mount(pr
->dev
, target
, pr
->id
->name
, m
->flags
,
810 (m
->options
) ? (m
->options
) : (""));
812 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %s\n",
813 pr
->dev
, pr
->id
->name
, target
, err
, strerror(err
));
815 handle_swapfiles(true);
823 snprintf(target
, sizeof(target
), "/mnt/%s", device
);
827 check_filesystem(pr
);
829 err
= mount(pr
->dev
, target
, pr
->id
->name
, 0, "");
831 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %s\n",
832 pr
->dev
, pr
->id
->name
, target
, err
, strerror(err
));
834 handle_swapfiles(true);
841 static int umount_device(struct blkid_struct_probe
*pr
)
844 char *device
= basename(pr
->dev
);
851 if (!strcmp(pr
->id
->name
, "swap"))
854 mp
= find_mount_point(pr
->dev
);
858 m
= find_block(pr
->uuid
, pr
->label
, device
, NULL
);
862 err
= umount2(mp
, MNT_DETACH
);
864 ULOG_ERR("unmounting %s (%s) failed (%d) - %s\n",
865 pr
->dev
, mp
, err
, strerror(err
));
867 ULOG_INFO("unmounted %s (%s)\n",
874 static int main_hotplug(int argc
, char **argv
)
877 char *action
, *device
, *mount_point
;
879 action
= getenv("ACTION");
880 device
= getenv("DEVNAME");
882 if (!action
|| !device
)
884 snprintf(path
, sizeof(path
), "/dev/%s", device
);
886 if (!strcmp(action
, "remove")) {
888 mount_point
= find_mount_point(path
);
890 err
= umount2(mount_point
, MNT_DETACH
);
893 ULOG_ERR("umount of %s failed (%d) - %s\n",
894 mount_point
, err
, strerror(err
));
898 } else if (strcmp(action
, "add")) {
899 ULOG_ERR("Unkown action %s\n", action
);
904 if (config_load(NULL
))
908 return mount_device(find_block_info(NULL
, NULL
, path
), 1);
911 static int find_block_mtd(char *name
, char *part
, int plen
)
913 FILE *fp
= fopen("/proc/mtd", "r");
914 static char line
[256];
920 while (!index
&& fgets(line
, sizeof(line
), fp
)) {
921 if (strstr(line
, name
)) {
922 char *eol
= strstr(line
, ":");
937 snprintf(part
, plen
, "/dev/mtdblock%s", index
);
943 static int find_ubi_vol(libubi_t libubi
, char *name
, int *dev_num
, int *vol_id
)
947 while (ubi_dev_present(libubi
, dev
))
949 struct ubi_dev_info dev_info
;
950 struct ubi_vol_info vol_info
;
952 if (ubi_get_dev_info1(libubi
, dev
++, &dev_info
))
954 if (ubi_get_vol_info1_nm(libubi
, dev_info
.dev_num
, name
, &vol_info
))
957 *dev_num
= dev_info
.dev_num
;
958 *vol_id
= vol_info
.vol_id
;
966 static int find_block_ubi(libubi_t libubi
, char *name
, char *part
, int plen
)
972 err
= find_ubi_vol(libubi
, name
, &dev_num
, &vol_id
);
974 snprintf(part
, plen
, "/dev/ubi%d_%d", dev_num
, vol_id
);
979 static int find_block_ubi_RO(libubi_t libubi
, char *name
, char *part
, int plen
)
985 err
= find_ubi_vol(libubi
, name
, &dev_num
, &vol_id
);
987 snprintf(part
, plen
, "/dev/ubiblock%d_%d", dev_num
, vol_id
);
994 static int find_root_dev(char *buf
, int len
)
1004 if (!(d
= opendir("/dev")))
1009 while ((e
= readdir(d
)) != NULL
) {
1010 snprintf(buf
, len
, "/dev/%s", e
->d_name
);
1012 if (stat(buf
, &s
) || s
.st_rdev
!= root
)
1025 static int test_fs_support(const char *name
)
1031 if ((f
= fopen("/proc/filesystems", "r")) != NULL
) {
1032 while (fgets(line
, sizeof(line
), f
)) {
1033 p
= strtok(line
, "\t\n");
1035 if (p
&& !strcmp(p
, "nodev"))
1036 p
= strtok(NULL
, "\t\n");
1038 if (p
&& !strcmp(p
, name
)) {
1049 static int check_extroot(char *path
)
1051 struct blkid_struct_probe
*pr
= NULL
;
1054 #ifdef UBIFS_EXTROOT
1055 if (find_block_mtd("\"rootfs\"", devpath
, sizeof(devpath
))) {
1059 libubi
= libubi_open();
1060 err
= find_block_ubi_RO(libubi
, "rootfs", devpath
, sizeof(devpath
));
1061 libubi_close(libubi
);
1066 if (find_block_mtd("\"rootfs\"", devpath
, sizeof(devpath
))) {
1067 if (find_root_dev(devpath
, sizeof(devpath
))) {
1068 ULOG_ERR("extroot: unable to determine root device\n");
1074 list_for_each_entry(pr
, &devices
, list
) {
1075 if (!strcmp(pr
->dev
, devpath
)) {
1079 char uuid
[64] = { 0 };
1081 snprintf(tag
, sizeof(tag
), "%s/etc", path
);
1085 snprintf(tag
, sizeof(tag
), "%s/etc/.extroot-uuid", path
);
1086 if (stat(tag
, &s
)) {
1087 fp
= fopen(tag
, "w+");
1089 ULOG_ERR("extroot: failed to write UUID to %s: %d (%s)\n",
1090 tag
, errno
, strerror(errno
));
1091 /* return 0 to continue boot regardless of error */
1094 fputs(pr
->uuid
, fp
);
1099 fp
= fopen(tag
, "r");
1101 ULOG_ERR("extroot: failed to read UUID from %s: %d (%s)\n",
1102 tag
, errno
, strerror(errno
));
1106 if (!fgets(uuid
, sizeof(uuid
), fp
))
1107 ULOG_ERR("extroot: failed to read UUID from %s: %d (%s)\n",
1108 tag
, errno
, strerror(errno
));
1111 if (*uuid
|| !strcasecmp(uuid
, pr
->uuid
))
1114 ULOG_ERR("extroot: UUID mismatch (root: %s, %s: %s)\n",
1115 pr
->uuid
, basename(path
), uuid
);
1120 ULOG_ERR("extroot: unable to lookup root device %s\n", devpath
);
1125 * Read info about extroot from UCI (using prefix) and mount it.
1127 static int mount_extroot(char *cfg
)
1129 char overlay
[] = "/tmp/extroot/overlay";
1130 char mnt
[] = "/tmp/extroot/mnt";
1132 struct blkid_struct_probe
*pr
;
1136 /* Load @cfg/etc/config/fstab */
1137 if (config_load(cfg
))
1140 /* See if there is extroot-specific mount config */
1141 m
= find_block(NULL
, NULL
, NULL
, "/");
1143 m
= find_block(NULL
, NULL
, NULL
, "/overlay");
1145 if (!m
|| !m
->extroot
)
1147 ULOG_INFO("extroot: not configured\n");
1151 /* Find block device pointed by the mount config */
1152 pr
= find_block_info(m
->uuid
, m
->label
, m
->device
);
1154 if (!pr
&& delay_root
){
1155 ULOG_INFO("extroot: device not present, retrying in %u seconds\n", delay_root
);
1159 pr
= find_block_info(m
->uuid
, m
->label
, m
->device
);
1162 if (strncmp(pr
->id
->name
, "ext", 3) &&
1163 strncmp(pr
->id
->name
, "ubifs", 5)) {
1164 ULOG_ERR("extroot: unsupported filesystem %s, try ext4\n", pr
->id
->name
);
1168 if (test_fs_support(pr
->id
->name
)) {
1169 ULOG_ERR("extroot: filesystem %s not supported by kernel\n", pr
->id
->name
);
1178 check_filesystem(pr
);
1180 err
= mount(pr
->dev
, path
, pr
->id
->name
, m
->flags
,
1181 (m
->options
) ? (m
->options
) : (""));
1184 ULOG_ERR("extroot: mounting %s (%s) on %s failed: %d (%s)\n",
1185 pr
->dev
, pr
->id
->name
, path
, err
, strerror(err
));
1186 } else if (m
->overlay
) {
1187 err
= check_extroot(path
);
1192 ULOG_ERR("extroot: cannot find device %s%s\n",
1193 (m
->uuid
? "with UUID " : (m
->label
? "with label " : "")),
1194 (m
->uuid
? m
->uuid
: (m
->label
? m
->label
: m
->device
)));
1200 static int main_extroot(int argc
, char **argv
)
1202 struct blkid_struct_probe
*pr
;
1203 char blkdev_path
[32] = { 0 };
1205 #ifdef UBIFS_EXTROOT
1209 if (!getenv("PREINIT"))
1213 ULOG_ERR("Usage: block extroot\n");
1220 /* enable LOG_INFO messages */
1221 ulog_threshold(LOG_INFO
);
1224 * Look for "rootfs_data". We will want to mount it and check for
1225 * extroot configuration.
1228 /* Start with looking for MTD partition */
1229 find_block_mtd("\"rootfs_data\"", blkdev_path
, sizeof(blkdev_path
));
1230 if (blkdev_path
[0]) {
1231 pr
= find_block_info(NULL
, NULL
, blkdev_path
);
1232 if (pr
&& !strcmp(pr
->id
->name
, "jffs2")) {
1233 char cfg
[] = "/tmp/jffs_cfg";
1236 * Mount MTD part and try extroot (using
1237 * /etc/config/fstab from that partition)
1240 if (!mount(blkdev_path
, cfg
, "jffs2", MS_NOATIME
, NULL
)) {
1241 err
= mount_extroot(cfg
);
1242 umount2(cfg
, MNT_DETACH
);
1245 rmdir("/tmp/overlay");
1251 #ifdef UBIFS_EXTROOT
1252 /* ... but it also could be an UBI volume */
1253 memset(blkdev_path
, 0, sizeof(blkdev_path
));
1254 libubi
= libubi_open();
1255 find_block_ubi(libubi
, "rootfs_data", blkdev_path
, sizeof(blkdev_path
));
1256 libubi_close(libubi
);
1257 if (blkdev_path
[0]) {
1258 char cfg
[] = "/tmp/ubifs_cfg";
1260 /* Mount volume and try extroot (using fstab from that vol) */
1262 if (!mount(blkdev_path
, cfg
, "ubifs", MS_NOATIME
, NULL
)) {
1263 err
= mount_extroot(cfg
);
1264 umount2(cfg
, MNT_DETACH
);
1267 rmdir("/tmp/overlay");
1273 return mount_extroot(NULL
);
1276 static int main_mount(int argc
, char **argv
)
1278 struct blkid_struct_probe
*pr
;
1280 if (config_load(NULL
))
1284 list_for_each_entry(pr
, &devices
, list
)
1285 mount_device(pr
, 0);
1287 handle_swapfiles(true);
1292 static int main_umount(int argc
, char **argv
)
1294 struct blkid_struct_probe
*pr
;
1296 if (config_load(NULL
))
1299 handle_swapfiles(false);
1302 list_for_each_entry(pr
, &devices
, list
)
1308 static int main_detect(int argc
, char **argv
)
1310 struct blkid_struct_probe
*pr
;
1313 printf("config 'global'\n");
1314 printf("\toption\tanon_swap\t'0'\n");
1315 printf("\toption\tanon_mount\t'0'\n");
1316 printf("\toption\tauto_swap\t'1'\n");
1317 printf("\toption\tauto_mount\t'1'\n");
1318 printf("\toption\tdelay_root\t'5'\n");
1319 printf("\toption\tcheck_fs\t'0'\n\n");
1320 list_for_each_entry(pr
, &devices
, list
)
1321 print_block_uci(pr
);
1326 static int main_info(int argc
, char **argv
)
1329 struct blkid_struct_probe
*pr
;
1333 list_for_each_entry(pr
, &devices
, list
)
1334 print_block_info(pr
);
1339 for (i
= 2; i
< argc
; i
++) {
1342 if (stat(argv
[i
], &s
)) {
1343 ULOG_ERR("failed to stat %s\n", argv
[i
]);
1346 if (!S_ISBLK(s
.st_mode
) && !(S_ISCHR(s
.st_mode
) && major(s
.st_rdev
) == 250)) {
1347 ULOG_ERR("%s is not a block device\n", argv
[i
]);
1350 pr
= find_block_info(NULL
, NULL
, argv
[i
]);
1352 print_block_info(pr
);
1358 static int swapon_usage(void)
1360 fprintf(stderr
, "Usage: swapon [-s] [-a] [[-p pri] DEVICE]\n\n"
1361 "\tStart swapping on [DEVICE]\n"
1362 " -a\tStart swapping on all swap devices\n"
1363 " -p pri\tSet priority of swap device\n"
1364 " -s\tShow summary\n");
1368 static int main_swapon(int argc
, char **argv
)
1374 struct blkid_struct_probe
*pr
;
1380 while ((ch
= getopt(argc
, argv
, "ap:s")) != -1) {
1383 fp
= fopen("/proc/swaps", "r");
1387 ULOG_ERR("failed to open /proc/swaps\n");
1390 while (getline(&lineptr
, &s
, fp
) > 0)
1391 printf("%s", lineptr
);
1398 list_for_each_entry(pr
, &devices
, list
) {
1399 if (strcmp(pr
->id
->name
, "swap"))
1401 if (swapon(pr
->dev
, 0))
1402 ULOG_ERR("failed to swapon %s\n", pr
->dev
);
1408 flags
= ((pri
<< SWAP_FLAG_PRIO_SHIFT
) & SWAP_FLAG_PRIO_MASK
) | SWAP_FLAG_PREFER
;
1411 return swapon_usage();
1416 if (optind
!= (argc
- 1))
1417 return swapon_usage();
1419 if (stat(argv
[optind
], &st
) || (!S_ISBLK(st
.st_mode
) && !S_ISREG(st
.st_mode
))) {
1420 ULOG_ERR("%s is not a block device or file\n", argv
[optind
]);
1423 err
= swapon(argv
[optind
], flags
);
1425 ULOG_ERR("failed to swapon %s (%d)\n", argv
[optind
], err
);
1432 static int main_swapoff(int argc
, char **argv
)
1435 ULOG_ERR("Usage: swapoff [-a] [DEVICE]\n\n"
1436 "\tStop swapping on DEVICE\n"
1437 " -a\tStop swapping on all swap devices\n");
1441 if (!strcmp(argv
[1], "-a")) {
1442 FILE *fp
= fopen("/proc/swaps", "r");
1446 ULOG_ERR("failed to open /proc/swaps\n");
1449 if (fgets(line
, sizeof(line
), fp
))
1450 while (fgets(line
, sizeof(line
), fp
)) {
1451 char *end
= strchr(line
, ' ');
1457 err
= swapoff(line
);
1459 ULOG_ERR("failed to swapoff %s (%d)\n", line
, err
);
1466 if (stat(argv
[1], &s
) || (!S_ISBLK(s
.st_mode
) && !S_ISREG(s
.st_mode
))) {
1467 ULOG_ERR("%s is not a block device or file\n", argv
[1]);
1470 err
= swapoff(argv
[1]);
1472 ULOG_ERR("failed to swapoff %s (%d)\n", argv
[1], err
);
1480 int main(int argc
, char **argv
)
1482 char *base
= basename(*argv
);
1486 ulog_open(-1, -1, "block");
1487 ulog_threshold(LOG_NOTICE
);
1489 if (!strcmp(base
, "swapon"))
1490 return main_swapon(argc
, argv
);
1492 if (!strcmp(base
, "swapoff"))
1493 return main_swapoff(argc
, argv
);
1495 if ((argc
> 1) && !strcmp(base
, "block")) {
1496 if (!strcmp(argv
[1], "info"))
1497 return main_info(argc
, argv
);
1499 if (!strcmp(argv
[1], "detect"))
1500 return main_detect(argc
, argv
);
1502 if (!strcmp(argv
[1], "hotplug"))
1503 return main_hotplug(argc
, argv
);
1505 if (!strcmp(argv
[1], "extroot"))
1506 return main_extroot(argc
, argv
);
1508 if (!strcmp(argv
[1], "mount"))
1509 return main_mount(argc
, argv
);
1511 if (!strcmp(argv
[1], "umount"))
1512 return main_umount(argc
, argv
);
1514 if (!strcmp(argv
[1], "remount")) {
1515 int ret
= main_umount(argc
, argv
);
1518 ret
= main_mount(argc
, argv
);
1523 ULOG_ERR("Usage: block <info|mount|umount|detect>\n");