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.
30 #include <sys/types.h>
32 #include <sys/mount.h>
34 #include <sys/sysmacros.h>
41 #include <libubox/ulog.h>
42 #include <libubox/list.h>
43 #include <libubox/vlist.h>
44 #include <libubox/blobmsg_json.h>
45 #include <libubox/avl-cmp.h>
50 #define AUTOFS_MOUNT_PATH "/tmp/run/blockd/"
53 #include "libubi/libubi.h"
68 struct vlist_node node
;
86 struct vlist_node node
;
88 struct probe_info
*pr
;
92 static void vlist_nop_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
93 struct vlist_node
*node_old
);
94 static int devices_cmp(const void *k1
, const void *k2
, void *ptr
);
96 static struct blob_buf b
;
97 static VLIST_TREE(mounts
, avl_strcmp
, vlist_nop_update
, false, false);
98 static VLIST_TREE(devices
, devices_cmp
, vlist_nop_update
, false, false);
99 static int anon_mount
, anon_swap
, auto_mount
, auto_swap
, check_fs
;
100 static unsigned int delay_root
;
112 static const struct blobmsg_policy config_policy
[__CFG_MAX
] = {
113 [CFG_ANON_SWAP
] = { .name
= "anon_swap", .type
= BLOBMSG_TYPE_INT32
},
114 [CFG_ANON_MOUNT
] = { .name
= "anon_mount", .type
= BLOBMSG_TYPE_INT32
},
115 [CFG_AUTO_SWAP
] = { .name
= "auto_swap", .type
= BLOBMSG_TYPE_INT32
},
116 [CFG_AUTO_MOUNT
] = { .name
= "auto_mount", .type
= BLOBMSG_TYPE_INT32
},
117 [CFG_DELAY_ROOT
] = { .name
= "delay_root", .type
= BLOBMSG_TYPE_INT32
},
118 [CFG_CHECK_FS
] = { .name
= "check_fs", .type
= BLOBMSG_TYPE_INT32
},
132 static const struct uci_blob_param_list config_attr_list
= {
133 .n_params
= __CFG_MAX
,
134 .params
= config_policy
,
137 static const struct blobmsg_policy mount_policy
[__MOUNT_MAX
] = {
138 [MOUNT_UUID
] = { .name
= "uuid", .type
= BLOBMSG_TYPE_STRING
},
139 [MOUNT_LABEL
] = { .name
= "label", .type
= BLOBMSG_TYPE_STRING
},
140 [MOUNT_DEVICE
] = { .name
= "device", .type
= BLOBMSG_TYPE_STRING
},
141 [MOUNT_TARGET
] = { .name
= "target", .type
= BLOBMSG_TYPE_STRING
},
142 [MOUNT_OPTIONS
] = { .name
= "options", .type
= BLOBMSG_TYPE_STRING
},
143 [MOUNT_ENABLE
] = { .name
= "enabled", .type
= BLOBMSG_TYPE_INT32
},
144 [MOUNT_AUTOFS
] = { .name
= "autofs", .type
= BLOBMSG_TYPE_INT32
},
147 static const struct uci_blob_param_list mount_attr_list
= {
148 .n_params
= __MOUNT_MAX
,
149 .params
= mount_policy
,
161 static const struct blobmsg_policy swap_policy
[__SWAP_MAX
] = {
162 [SWAP_ENABLE
] = { .name
= "enabled", .type
= BLOBMSG_TYPE_INT32
},
163 [SWAP_UUID
] = { .name
= "uuid", .type
= BLOBMSG_TYPE_STRING
},
164 [SWAP_LABEL
] = { .name
= "label", .type
= BLOBMSG_TYPE_STRING
},
165 [SWAP_DEVICE
] = { .name
= "device", .type
= BLOBMSG_TYPE_STRING
},
166 [SWAP_PRIO
] = { .name
= "priority", .type
= BLOBMSG_TYPE_INT32
},
169 static const struct uci_blob_param_list swap_attr_list
= {
170 .n_params
= __SWAP_MAX
,
171 .params
= swap_policy
,
179 static const struct mount_flag mount_flags
[] = {
180 { "sync", MS_SYNCHRONOUS
},
181 { "async", ~MS_SYNCHRONOUS
},
182 { "dirsync", MS_DIRSYNC
},
183 { "mand", MS_MANDLOCK
},
184 { "nomand", ~MS_MANDLOCK
},
185 { "atime", ~MS_NOATIME
},
186 { "noatime", MS_NOATIME
},
187 { "dev", ~MS_NODEV
},
188 { "nodev", MS_NODEV
},
189 { "diratime", ~MS_NODIRATIME
},
190 { "nodiratime", MS_NODIRATIME
},
191 { "exec", ~MS_NOEXEC
},
192 { "noexec", MS_NOEXEC
},
193 { "suid", ~MS_NOSUID
},
194 { "nosuid", MS_NOSUID
},
195 { "rw", ~MS_RDONLY
},
197 { "relatime", MS_RELATIME
},
198 { "norelatime", ~MS_RELATIME
},
199 { "strictatime", MS_STRICTATIME
},
200 { "acl", MS_POSIXACL
},
201 { "noacl", ~MS_POSIXACL
},
202 { "nouser_xattr", MS_NOUSER
},
203 { "user_xattr", ~MS_NOUSER
},
206 static char *blobmsg_get_strdup(struct blob_attr
*attr
)
211 return strdup(blobmsg_get_string(attr
));
214 static char *blobmsg_get_basename(struct blob_attr
*attr
)
219 return strdup(basename(blobmsg_get_string(attr
)));
222 static void parse_mount_options(struct mount
*m
, char *optstr
)
226 char *p
, *opts
, *last
;
231 if (!optstr
|| !*optstr
)
234 m
->options
= opts
= calloc(1, strlen(optstr
) + 1);
247 for (i
= 0, is_flag
= false; i
< ARRAY_SIZE(mount_flags
); i
++) {
248 if (!strcmp(last
, mount_flags
[i
].name
)) {
249 if (mount_flags
[i
].flag
< 0)
250 m
->flags
&= (uint32_t)mount_flags
[i
].flag
;
252 m
->flags
|= (uint32_t)mount_flags
[i
].flag
;
259 opts
+= sprintf(opts
, "%s%s", (opts
> m
->options
) ? "," : "", last
);
268 static int mount_add(struct uci_section
*s
)
270 struct blob_attr
*tb
[__MOUNT_MAX
] = { 0 };
273 blob_buf_init(&b
, 0);
274 uci_to_blob(&b
, s
, &mount_attr_list
);
275 blobmsg_parse(mount_policy
, __MOUNT_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
277 if (!tb
[MOUNT_LABEL
] && !tb
[MOUNT_UUID
] && !tb
[MOUNT_DEVICE
])
280 if (tb
[MOUNT_ENABLE
] && !blobmsg_get_u32(tb
[MOUNT_ENABLE
]))
283 m
= malloc(sizeof(struct mount
));
284 m
->type
= TYPE_MOUNT
;
285 m
->uuid
= blobmsg_get_strdup(tb
[MOUNT_UUID
]);
286 m
->label
= blobmsg_get_strdup(tb
[MOUNT_LABEL
]);
287 m
->target
= blobmsg_get_strdup(tb
[MOUNT_TARGET
]);
288 m
->device
= blobmsg_get_basename(tb
[MOUNT_DEVICE
]);
289 if (tb
[MOUNT_AUTOFS
])
290 m
->autofs
= blobmsg_get_u32(tb
[MOUNT_AUTOFS
]);
293 parse_mount_options(m
, blobmsg_get_strdup(tb
[MOUNT_OPTIONS
]));
295 m
->overlay
= m
->extroot
= 0;
296 if (m
->target
&& !strcmp(m
->target
, "/"))
298 if (m
->target
&& !strcmp(m
->target
, "/overlay"))
299 m
->extroot
= m
->overlay
= 1;
301 if (m
->target
&& *m
->target
!= '/') {
302 ULOG_WARN("ignoring mount section %s due to invalid target '%s'\n",
303 s
->e
.name
, m
->target
);
309 vlist_add(&mounts
, &m
->node
, m
->uuid
);
311 vlist_add(&mounts
, &m
->node
, m
->label
);
313 vlist_add(&mounts
, &m
->node
, m
->device
);
318 static int swap_add(struct uci_section
*s
)
320 struct blob_attr
*tb
[__SWAP_MAX
] = { 0 };
323 blob_buf_init(&b
, 0);
324 uci_to_blob(&b
, s
, &swap_attr_list
);
325 blobmsg_parse(swap_policy
, __SWAP_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
327 if (!tb
[SWAP_UUID
] && !tb
[SWAP_LABEL
] && !tb
[SWAP_DEVICE
])
330 m
= malloc(sizeof(struct mount
));
331 memset(m
, 0, sizeof(struct mount
));
333 m
->uuid
= blobmsg_get_strdup(tb
[SWAP_UUID
]);
334 m
->label
= blobmsg_get_strdup(tb
[SWAP_LABEL
]);
335 m
->device
= blobmsg_get_basename(tb
[SWAP_DEVICE
]);
337 m
->prio
= blobmsg_get_u32(tb
[SWAP_PRIO
]);
339 m
->prio
= ((m
->prio
<< SWAP_FLAG_PRIO_SHIFT
) & SWAP_FLAG_PRIO_MASK
) | SWAP_FLAG_PREFER
;
341 if ((!tb
[SWAP_ENABLE
]) || blobmsg_get_u32(tb
[SWAP_ENABLE
])) {
342 /* store complete swap path */
344 m
->target
= blobmsg_get_strdup(tb
[SWAP_DEVICE
]);
347 vlist_add(&mounts
, &m
->node
, m
->uuid
);
349 vlist_add(&mounts
, &m
->node
, m
->label
);
351 vlist_add(&mounts
, &m
->node
, m
->device
);
357 static int global_add(struct uci_section
*s
)
359 struct blob_attr
*tb
[__CFG_MAX
] = { 0 };
361 blob_buf_init(&b
, 0);
362 uci_to_blob(&b
, s
, &config_attr_list
);
363 blobmsg_parse(config_policy
, __CFG_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
365 if ((tb
[CFG_ANON_MOUNT
]) && blobmsg_get_u32(tb
[CFG_ANON_MOUNT
]))
367 if ((tb
[CFG_ANON_SWAP
]) && blobmsg_get_u32(tb
[CFG_ANON_SWAP
]))
370 if ((tb
[CFG_AUTO_MOUNT
]) && blobmsg_get_u32(tb
[CFG_AUTO_MOUNT
]))
372 if ((tb
[CFG_AUTO_SWAP
]) && blobmsg_get_u32(tb
[CFG_AUTO_SWAP
]))
375 if (tb
[CFG_DELAY_ROOT
])
376 delay_root
= blobmsg_get_u32(tb
[CFG_DELAY_ROOT
]);
378 if ((tb
[CFG_CHECK_FS
]) && blobmsg_get_u32(tb
[CFG_CHECK_FS
]))
384 static struct mount
* find_swap(const char *uuid
, const char *label
, const char *device
)
388 vlist_for_each_element(&mounts
, m
, node
) {
389 if (m
->type
!= TYPE_SWAP
)
391 if (uuid
&& m
->uuid
&& !strcasecmp(m
->uuid
, uuid
))
393 if (label
&& m
->label
&& !strcmp(m
->label
, label
))
395 if (device
&& m
->device
&& !strcmp(m
->device
, device
))
402 static struct mount
* find_block(const char *uuid
, const char *label
, const char *device
,
407 vlist_for_each_element(&mounts
, m
, node
) {
408 if (m
->type
!= TYPE_MOUNT
)
410 if (m
->uuid
&& uuid
&& !strcasecmp(m
->uuid
, uuid
))
412 if (m
->label
&& label
&& !strcmp(m
->label
, label
))
414 if (m
->target
&& target
&& !strcmp(m
->target
, target
))
416 if (m
->device
&& device
&& !strcmp(m
->device
, device
))
423 static void vlist_nop_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
424 struct vlist_node
*node_old
)
426 // NOTE: free on delete skipped
429 static struct uci_package
* config_try_load(struct uci_context
*ctx
, char *path
)
431 char *file
= basename(path
);
432 char *dir
= dirname(path
);
434 struct uci_package
*pkg
;
436 uci_set_confdir(ctx
, dir
);
437 ULOG_INFO("attempting to load %s/%s\n", dir
, file
);
439 if (uci_load(ctx
, file
, &pkg
)) {
440 uci_get_errorstr(ctx
, &err
, file
);
441 ULOG_ERR("unable to load configuration (%s)\n", err
);
450 static int config_load(char *cfg
)
452 struct uci_context
*ctx
= uci_alloc_context();
453 struct uci_package
*pkg
= NULL
;
454 struct uci_element
*e
;
458 snprintf(path
, sizeof(path
), "%s/upper/etc/config/fstab", cfg
);
459 pkg
= config_try_load(ctx
, path
);
462 snprintf(path
, sizeof(path
), "%s/etc/config/fstab", cfg
);
463 pkg
= config_try_load(ctx
, path
);
468 snprintf(path
, sizeof(path
), "/etc/config/fstab");
469 pkg
= config_try_load(ctx
, path
);
473 ULOG_ERR("no usable configuration\n");
477 vlist_update(&mounts
);
478 uci_foreach_element(&pkg
->sections
, e
) {
479 struct uci_section
*s
= uci_to_section(e
);
481 if (!strcmp(s
->type
, "mount"))
483 if (!strcmp(s
->type
, "swap"))
485 if (!strcmp(s
->type
, "global"))
488 vlist_flush(&mounts
);
493 static struct probe_info
* _probe_path(char *path
)
498 /* skip ubi device if ubiblock device is present */
499 if (path
[5] == 'u' && path
[6] == 'b' && path
[7] == 'i' &&
500 path
[8] >= '0' && path
[8] <= '9' ) {
501 snprintf(tmppath
, sizeof(tmppath
), "/dev/ubiblock%s", path
+ 8);
502 vlist_for_each_element(&devices
, dev
, node
)
503 if (!strcasecmp(dev
->pr
->dev
, tmppath
))
507 return probe_path(path
);
510 static int _cache_load(const char *path
)
512 int gl_flags
= GLOB_NOESCAPE
| GLOB_MARK
;
517 if (glob(path
, gl_flags
, NULL
, &gl
) < 0)
520 for (j
= 0; j
< gl
.gl_pathc
; j
++) {
521 struct probe_info
*pr
= _probe_path(gl
.gl_pathv
[j
]);
523 dev
= malloc(sizeof(struct device
));
525 dev
->m
= find_block(pr
->uuid
, pr
->label
,
526 basename(pr
->dev
), NULL
);
527 vlist_add(&devices
, &dev
->node
, dev
);
536 static int devices_cmp(const void *k1
, const void *k2
, void *ptr
)
538 struct device
*dev1
= (struct device
*)k1
;
539 struct device
*dev2
= (struct device
*)k2
;
544 if (dev1
->m
->type
== TYPE_MOUNT
&& dev2
->m
->type
== TYPE_MOUNT
&&
545 dev1
->m
->target
&& dev2
->m
->target
) {
546 int len1
= strlen(dev1
->m
->target
);
547 int len2
= strlen(dev2
->m
->target
);
551 } else if (dev2
->m
) {
554 return strcmp(dev1
->pr
->dev
, dev2
->pr
->dev
);
557 static void cache_load(int mtd
)
559 vlist_update(&devices
);
561 _cache_load("/dev/mtdblock*");
562 _cache_load("/dev/ubiblock*");
563 _cache_load("/dev/ubi[0-9]*");
565 _cache_load("/dev/loop*");
566 _cache_load("/dev/mmcblk*");
567 _cache_load("/dev/sd*");
568 _cache_load("/dev/hd*");
569 _cache_load("/dev/md*");
570 _cache_load("/dev/nvme*");
571 _cache_load("/dev/vd*");
572 _cache_load("/dev/xvd*");
573 _cache_load("/dev/mapper/*");
574 vlist_flush(&devices
);
578 static int print_block_uci(struct probe_info
*pr
)
580 if (!strcmp(pr
->type
, "swap")) {
581 printf("config 'swap'\n");
583 printf("config 'mount'\n");
584 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr
->dev
));
587 printf("\toption\tuuid\t'%s'\n", pr
->uuid
);
589 printf("\toption\tdevice\t'%s'\n", pr
->dev
);
590 printf("\toption\tenabled\t'0'\n\n");
595 static struct device
* find_block_device(char *uuid
, char *label
, char *path
)
600 vlist_for_each_element(&devices
, dev
, node
)
601 if (dev
->pr
->uuid
&& !strcasecmp(dev
->pr
->uuid
, uuid
))
605 vlist_for_each_element(&devices
, dev
, node
)
606 if (dev
->pr
->label
&& !strcmp(dev
->pr
->label
, label
))
610 vlist_for_each_element(&devices
, dev
, node
)
611 if (dev
->pr
->dev
&& !strcmp(basename(dev
->pr
->dev
), basename(path
)))
617 static char* find_mount_point(char *block
)
619 FILE *fp
= fopen("/proc/self/mountinfo", "r");
620 static char line
[256];
621 char *point
= NULL
, *pos
, *tmp
, *cpoint
, *devname
;
624 unsigned int minor
, major
;
629 rstat
= stat(block
, &s
);
631 while (fgets(line
, sizeof(line
), fp
)) {
632 pos
= strchr(line
, ' ');
636 pos
= strchr(pos
+ 1, ' ');
641 pos
= strchr(pos
, ':');
648 pos
= strchr(pos
, ' ');
654 pos
= strchr(pos
+ 1, ' ');
659 pos
= strchr(pos
, ' ');
665 pos
= strchr(pos
+ 1, ' ');
669 pos
= strchr(pos
+ 1, ' ');
673 pos
= strchr(pos
+ 1, ' ');
678 pos
= strchr(pos
, ' ');
684 if (!strcmp(block
, devname
)) {
685 point
= strdup(cpoint
);
692 if (!S_ISBLK(s
.st_mode
))
695 if (major
== major(s
.st_rdev
) &&
696 minor
== minor(s
.st_rdev
)) {
697 point
= strdup(cpoint
);
707 static int print_block_info(struct probe_info
*pr
)
711 mp
= find_mount_point(pr
->dev
);
712 printf("%s:", pr
->dev
);
714 printf(" UUID=\"%s\"", pr
->uuid
);
717 printf(" LABEL=\"%s\"", pr
->label
);
720 printf(" VERSION=\"%s\"", pr
->version
);
723 printf(" MOUNT=\"%s\"", mp
);
727 printf(" TYPE=\"%s\"\n", pr
->type
);
732 static void mkdir_p(char *dir
)
734 char *l
= strrchr(dir
, '/');
744 static void check_filesystem(struct probe_info
*pr
)
748 const char *e2fsck
= "/usr/sbin/e2fsck";
749 const char *f2fsck
= "/usr/sbin/fsck.f2fs";
750 const char *fatfsck
= "/usr/sbin/fsck.fat";
751 const char *btrfsck
= "/usr/bin/btrfsck";
752 const char *ntfsck
= "/usr/bin/ntfsfix";
755 /* UBIFS does not need stuff like fsck */
756 if (!strncmp(pr
->type
, "ubifs", 5))
759 if (!strncmp(pr
->type
, "vfat", 4)) {
761 } else if (!strncmp(pr
->type
, "f2fs", 4)) {
763 } else if (!strncmp(pr
->type
, "ext", 3)) {
765 } else if (!strncmp(pr
->type
, "btrfs", 5)) {
767 } else if (!strncmp(pr
->type
, "ntfs", 4)) {
770 ULOG_ERR("check_filesystem: %s is not supported\n", pr
->type
);
774 if (stat(ckfs
, &statbuf
) < 0) {
775 ULOG_ERR("check_filesystem: %s not found\n", ckfs
);
781 if(!strncmp(pr
->type
, "f2fs", 4)) {
782 execl(ckfs
, ckfs
, "-f", pr
->dev
, NULL
);
784 } else if(!strncmp(pr
->type
, "btrfs", 5)) {
785 execl(ckfs
, ckfs
, "--repair", pr
->dev
, NULL
);
787 } else if(!strncmp(pr
->type
, "ntfs", 4)) {
788 execl(ckfs
, ckfs
, "-b", pr
->dev
, NULL
);
791 execl(ckfs
, ckfs
, "-p", pr
->dev
, NULL
);
794 } else if (pid
> 0) {
797 waitpid(pid
, &status
, 0);
798 if (WIFEXITED(status
) && WEXITSTATUS(status
))
799 ULOG_ERR("check_filesystem: %s returned %d\n", ckfs
, WEXITSTATUS(status
));
800 if (WIFSIGNALED(status
))
801 ULOG_ERR("check_filesystem: %s terminated by %s\n", ckfs
, strsignal(WTERMSIG(status
)));
805 static void handle_swapfiles(bool on
)
809 struct probe_info
*pr
;
811 vlist_for_each_element(&mounts
, m
, node
)
813 if (m
->type
!= TYPE_SWAP
|| !m
->target
)
816 if (stat(m
->target
, &s
) || !S_ISREG(s
.st_mode
))
819 pr
= _probe_path(m
->target
);
824 if (!strcmp(pr
->type
, "swap")) {
826 swapon(pr
->dev
, m
->prio
);
835 static void to_devnull(int fd
)
837 int devnull
= open("/dev/null", fd
? O_WRONLY
: O_RDONLY
);
842 if (devnull
> STDERR_FILENO
)
846 static int exec_mount(const char *source
, const char *target
,
847 const char *fstype
, const char *options
)
852 int err
, status
, pfds
[2];
853 char errmsg
[128], cmd
[sizeof("/sbin/mount.XXXXXXXXXXXXXXXX\0")];
855 snprintf(cmd
, sizeof(cmd
), "/sbin/mount.%s", fstype
);
857 if (stat(cmd
, &s
) < 0 || !S_ISREG(s
.st_mode
) || !(s
.st_mode
& S_IXUSR
)) {
858 ULOG_ERR("No \"mount.%s\" utility available\n", fstype
);
865 fcntl(pfds
[0], F_SETFD
, fcntl(pfds
[0], F_GETFD
) | FD_CLOEXEC
);
866 fcntl(pfds
[1], F_SETFD
, fcntl(pfds
[1], F_GETFD
) | FD_CLOEXEC
);
878 to_devnull(STDIN_FILENO
);
879 to_devnull(STDOUT_FILENO
);
881 dup2(pfds
[1], STDERR_FILENO
);
885 if (options
&& *options
)
886 execl(cmd
, cmd
, "-o", options
, source
, target
, NULL
);
888 execl(cmd
, cmd
, source
, target
, NULL
);
895 mount_fd
= fdopen(pfds
[0], "r");
897 while (fgets(errmsg
, sizeof(errmsg
), mount_fd
))
898 ULOG_ERR("mount.%s: %s", fstype
, errmsg
);
902 err
= waitpid(pid
, &status
, 0);
906 ULOG_ERR("mount.%s: failed with status %d\n", fstype
, status
);
921 static int hotplug_call_mount(const char *action
, const char *device
)
928 char * const argv
[] = { "hotplug-call", "mount", NULL
};
930 setenv("ACTION", action
, 1);
931 setenv("DEVICE", device
, 1);
933 execv("/sbin/hotplug-call", argv
);
935 } else if (pid
> 0) {
938 pid
= waitpid(pid
, &status
, 0);
939 if (pid
<= 0 || !WIFEXITED(status
) || WEXITSTATUS(status
)) {
941 ULOG_ERR("hotplug-call call failed\n");
950 static int handle_mount(const char *source
, const char *target
,
951 const char *fstype
, struct mount
*m
)
954 size_t mount_opts_len
;
955 char *mount_opts
= NULL
, *ptr
;
957 err
= mount(source
, target
, fstype
, m
? m
->flags
: 0,
958 (m
&& m
->options
) ? m
->options
: "");
960 /* Requested file system type is not available in kernel,
961 attempt to call mount helper. */
962 if (err
== -1 && errno
== ENODEV
) {
964 /* Convert mount flags back into string representation,
965 first calculate needed length of string buffer... */
966 mount_opts_len
= 1 + (m
->options
? strlen(m
->options
) : 0);
968 for (i
= 0; i
< ARRAY_SIZE(mount_flags
); i
++)
969 if ((mount_flags
[i
].flag
> 0) &&
970 (mount_flags
[i
].flag
< INT_MAX
) &&
971 (m
->flags
& (uint32_t)mount_flags
[i
].flag
))
972 mount_opts_len
+= strlen(mount_flags
[i
].name
) + 1;
974 /* ... then now allocate and fill it ... */
975 ptr
= mount_opts
= calloc(1, mount_opts_len
);
983 ptr
+= sprintf(ptr
, "%s,", m
->options
);
985 for (i
= 0; i
< ARRAY_SIZE(mount_flags
); i
++)
986 if ((mount_flags
[i
].flag
> 0) &&
987 (mount_flags
[i
].flag
< INT_MAX
) &&
988 (m
->flags
& (uint32_t)mount_flags
[i
].flag
))
989 ptr
+= sprintf(ptr
, "%s,", mount_flags
[i
].name
);
991 mount_opts
[mount_opts_len
- 1] = 0;
994 /* ... and now finally invoke the external mount program */
995 err
= exec_mount(source
, target
, fstype
, mount_opts
);
1001 static int blockd_notify(char *device
, struct mount
*m
, struct probe_info
*pr
)
1003 struct ubus_context
*ctx
= ubus_connect(NULL
);
1010 if (!ubus_lookup_id(ctx
, "block", &id
)) {
1011 struct blob_buf buf
= { 0 };
1012 char *d
= strrchr(device
, '/');
1019 blob_buf_init(&buf
, 0);
1023 blobmsg_add_string(&buf
, "device", d
);
1025 blobmsg_add_string(&buf
, "uuid", m
->uuid
);
1027 blobmsg_add_string(&buf
, "label", m
->label
);
1029 blobmsg_add_string(&buf
, "target", m
->target
);
1031 blobmsg_add_string(&buf
, "options", m
->options
);
1033 blobmsg_add_u32(&buf
, "autofs", m
->autofs
);
1035 blobmsg_add_string(&buf
, "type", pr
->type
);
1037 blobmsg_add_string(&buf
, "version", pr
->version
);
1039 blobmsg_add_string(&buf
, "device", d
);
1041 blobmsg_add_string(&buf
, "uuid", pr
->uuid
);
1043 blobmsg_add_string(&buf
, "label", pr
->label
);
1045 blobmsg_add_string(&buf
, "type", pr
->type
);
1047 blobmsg_add_string(&buf
, "version", pr
->version
);
1048 blobmsg_add_u32(&buf
, "anon", 1);
1050 blobmsg_add_string(&buf
, "device", d
);
1051 blobmsg_add_u32(&buf
, "remove", 1);
1054 err
= ubus_invoke(ctx
, id
, "hotplug", buf
.head
, NULL
, NULL
, 3000);
1064 static int mount_device(struct device
*dev
, int type
)
1067 struct probe_info
*pr
;
1078 device
= basename(pr
->dev
);
1080 if (!strcmp(pr
->type
, "swap")) {
1081 if ((type
== TYPE_HOTPLUG
) && !auto_swap
)
1083 m
= find_swap(pr
->uuid
, pr
->label
, device
);
1085 swapon(pr
->dev
, (m
) ? (m
->prio
) : (0));
1091 if (m
&& m
->extroot
)
1094 mp
= find_mount_point(pr
->dev
);
1095 if (mp
&& (type
!= TYPE_HOTPLUG
)) {
1096 ULOG_ERR("%s is already mounted on %s\n", pr
->dev
, mp
);
1101 if (type
== TYPE_HOTPLUG
)
1102 blockd_notify(device
, m
, pr
);
1104 /* Check if device should be mounted & set the target directory */
1124 snprintf(_target
, sizeof(_target
), "/tmp/run/blockd/%s", device
);
1126 } else if (m
->target
) {
1129 snprintf(_target
, sizeof(_target
), "/mnt/%s", device
);
1132 } else if (anon_mount
) {
1133 snprintf(_target
, sizeof(_target
), "/mnt/%s", device
);
1136 /* No reason to mount this device */
1140 /* Mount the device */
1143 check_filesystem(pr
);
1147 err
= handle_mount(pr
->dev
, target
, pr
->type
, m
);
1149 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %m\n",
1150 pr
->dev
, pr
->type
, target
, errno
);
1154 handle_swapfiles(true);
1156 if (type
!= TYPE_AUTOFS
)
1157 hotplug_call_mount("add", device
);
1162 static int umount_device(char *path
, int type
, bool all
)
1167 mp
= find_mount_point(path
);
1170 if (!strcmp(mp
, "/") && !all
)
1173 if (type
!= TYPE_AUTOFS
)
1174 hotplug_call_mount("remove", basename(path
));
1176 err
= umount2(mp
, MNT_DETACH
);
1178 ULOG_ERR("unmounting %s (%s) failed (%d) - %m\n", path
, mp
,
1181 ULOG_INFO("unmounted %s (%s)\n", path
, mp
);
1189 static int mount_action(char *action
, char *device
, int type
)
1191 struct device
*the_dev
, *dev
;
1194 if (!action
|| !device
)
1197 if (config_load(NULL
))
1201 the_dev
= find_block_device(NULL
, NULL
, device
);
1203 if (!strcmp(action
, "remove")) {
1204 if (type
== TYPE_HOTPLUG
)
1205 blockd_notify(device
, NULL
, NULL
);
1207 if (!the_dev
|| !the_dev
->m
|| the_dev
->m
->type
!= TYPE_MOUNT
) {
1208 snprintf(path
, sizeof(path
), "/dev/%s", device
);
1209 umount_device(path
, type
, true);
1211 vlist_for_element_to_last_reverse(&devices
, the_dev
, dev
, node
)
1212 if (dev
->m
&& dev
->m
->type
== TYPE_MOUNT
)
1213 umount_device(dev
->pr
->dev
, type
, true);
1215 } else if (!strcmp(action
, "add")) {
1218 if (the_dev
->m
&& the_dev
->m
->type
== TYPE_MOUNT
) {
1219 vlist_for_first_to_element(&devices
, the_dev
, dev
, node
) {
1220 if (dev
->m
&& dev
->m
->type
== TYPE_MOUNT
) {
1221 int err
= mount_device(dev
, type
);
1228 return mount_device(the_dev
, type
);
1230 ULOG_ERR("Unkown action %s\n", action
);
1234 static int main_hotplug(int argc
, char **argv
)
1236 return mount_action(getenv("ACTION"), getenv("DEVNAME"), TYPE_HOTPLUG
);
1239 static int main_autofs(int argc
, char **argv
)
1246 if (!strcmp(argv
[2], "start")) {
1248 struct probe_info
*pr
;
1250 if (config_load(NULL
))
1254 vlist_for_each_element(&devices
, dev
, node
) {
1258 if (!strcmp(pr
->type
, "swap"))
1262 if (m
&& m
->extroot
)
1265 blockd_notify(pr
->dev
, m
, pr
);
1267 } else if (!strcmp(argv
[2], "available")) {
1268 err
= hotplug_call_mount("add", argv
[3]);
1269 } else if (!strcmp(argv
[2], "unavailable")) {
1270 err
= hotplug_call_mount("remove", argv
[3]);
1275 err
= mount_action(argv
[2], argv
[3], TYPE_AUTOFS
);
1279 ULOG_ERR("autofs: \"%s\" action has failed: %d\n", argv
[2], err
);
1285 static int find_block_mtd(char *name
, char *part
, int plen
)
1287 FILE *fp
= fopen("/proc/mtd", "r");
1288 static char line
[256];
1294 while (!index
&& fgets(line
, sizeof(line
), fp
)) {
1295 if (strstr(line
, name
)) {
1296 char *eol
= strstr(line
, ":");
1311 snprintf(part
, plen
, "/dev/mtdblock%s", index
);
1316 #ifdef UBIFS_EXTROOT
1317 static int find_ubi_vol(libubi_t libubi
, char *name
, int *dev_num
, int *vol_id
)
1321 while (ubi_dev_present(libubi
, dev
))
1323 struct ubi_dev_info dev_info
;
1324 struct ubi_vol_info vol_info
;
1326 if (ubi_get_dev_info1(libubi
, dev
++, &dev_info
))
1328 if (ubi_get_vol_info1_nm(libubi
, dev_info
.dev_num
, name
, &vol_info
))
1331 *dev_num
= dev_info
.dev_num
;
1332 *vol_id
= vol_info
.vol_id
;
1340 static int find_block_ubi(libubi_t libubi
, char *name
, char *part
, int plen
)
1346 err
= find_ubi_vol(libubi
, name
, &dev_num
, &vol_id
);
1348 snprintf(part
, plen
, "/dev/ubi%d_%d", dev_num
, vol_id
);
1353 static int find_block_ubi_RO(libubi_t libubi
, char *name
, char *part
, int plen
)
1359 err
= find_ubi_vol(libubi
, name
, &dev_num
, &vol_id
);
1361 snprintf(part
, plen
, "/dev/ubiblock%d_%d", dev_num
, vol_id
);
1368 static int find_root_dev(char *buf
, int len
)
1378 if (!(d
= opendir("/dev")))
1383 while ((e
= readdir(d
)) != NULL
) {
1384 snprintf(buf
, len
, "/dev/%s", e
->d_name
);
1386 if (stat(buf
, &s
) || s
.st_rdev
!= root
)
1399 static int test_fs_support(const char *name
)
1405 if ((f
= fopen("/proc/filesystems", "r")) != NULL
) {
1406 while (fgets(line
, sizeof(line
), f
)) {
1407 p
= strtok(line
, "\t\n");
1409 if (p
&& !strcmp(p
, "nodev"))
1410 p
= strtok(NULL
, "\t\n");
1412 if (p
&& !strcmp(p
, name
)) {
1423 static int check_extroot(char *path
)
1426 struct probe_info
*pr
;
1429 #ifdef UBIFS_EXTROOT
1430 if (find_block_mtd("\"rootfs\"", devpath
, sizeof(devpath
))) {
1434 libubi
= libubi_open();
1435 err
= find_block_ubi_RO(libubi
, "rootfs", devpath
, sizeof(devpath
));
1436 libubi_close(libubi
);
1441 if (find_block_mtd("\"rootfs\"", devpath
, sizeof(devpath
))) {
1442 if (find_root_dev(devpath
, sizeof(devpath
))) {
1443 ULOG_ERR("extroot: unable to determine root device\n");
1449 vlist_for_each_element(&devices
, dev
, node
) {
1451 if (!strcmp(pr
->dev
, devpath
)) {
1455 char uuid
[64] = { 0 };
1457 snprintf(tag
, sizeof(tag
), "%s/etc", path
);
1461 snprintf(tag
, sizeof(tag
), "%s/etc/.extroot-uuid", path
);
1462 if (stat(tag
, &s
)) {
1463 fp
= fopen(tag
, "w+");
1465 ULOG_ERR("extroot: failed to write UUID to %s: %d (%m)\n",
1467 /* return 0 to continue boot regardless of error */
1470 fputs(pr
->uuid
, fp
);
1475 fp
= fopen(tag
, "r");
1477 ULOG_ERR("extroot: failed to read UUID from %s: %d (%m)\n",
1482 if (!fgets(uuid
, sizeof(uuid
), fp
))
1483 ULOG_ERR("extroot: failed to read UUID from %s: %d (%m)\n",
1487 if (*uuid
&& !strcasecmp(uuid
, pr
->uuid
))
1490 ULOG_ERR("extroot: UUID mismatch (root: %s, %s: %s)\n",
1491 pr
->uuid
, basename(path
), uuid
);
1496 ULOG_ERR("extroot: unable to lookup root device %s\n", devpath
);
1501 * Read info about extroot from UCI (using prefix) and mount it.
1503 static int mount_extroot(char *cfg
)
1505 char overlay
[] = "/tmp/extroot/overlay";
1506 char mnt
[] = "/tmp/extroot/mnt";
1509 struct probe_info
*pr
;
1513 /* Load @cfg/etc/config/fstab */
1514 if (config_load(cfg
))
1517 /* See if there is extroot-specific mount config */
1518 m
= find_block(NULL
, NULL
, NULL
, "/");
1520 m
= find_block(NULL
, NULL
, NULL
, "/overlay");
1522 if (!m
|| !m
->extroot
)
1524 ULOG_INFO("extroot: not configured\n");
1528 /* Find block device pointed by the mount config */
1529 dev
= find_block_device(m
->uuid
, m
->label
, m
->device
);
1531 if (!dev
&& delay_root
){
1532 ULOG_INFO("extroot: device not present, retrying in %u seconds\n", delay_root
);
1536 dev
= find_block_device(m
->uuid
, m
->label
, m
->device
);
1540 if (strncmp(pr
->type
, "ext", 3) &&
1541 strncmp(pr
->type
, "f2fs", 4) &&
1542 strncmp(pr
->type
, "btrfs", 5) &&
1543 strncmp(pr
->type
, "ntfs", 4) &&
1544 strncmp(pr
->type
, "ubifs", 5)) {
1545 ULOG_ERR("extroot: unsupported filesystem %s, try ext4, f2fs, btrfs, ntfs or ubifs\n", pr
->type
);
1549 if (test_fs_support(pr
->type
)) {
1550 ULOG_ERR("extroot: filesystem %s not supported by kernel\n", pr
->type
);
1559 check_filesystem(pr
);
1561 err
= mount(pr
->dev
, path
, pr
->type
, m
->flags
,
1562 (m
->options
) ? (m
->options
) : (""));
1565 ULOG_ERR("extroot: mounting %s (%s) on %s failed: %d (%m)\n",
1566 pr
->dev
, pr
->type
, path
, errno
);
1567 } else if (m
->overlay
) {
1568 err
= check_extroot(path
);
1573 ULOG_ERR("extroot: cannot find device %s%s\n",
1574 (m
->uuid
? "with UUID " : (m
->label
? "with label " : "")),
1575 (m
->uuid
? m
->uuid
: (m
->label
? m
->label
: m
->device
)));
1581 static int main_extroot(int argc
, char **argv
)
1583 char blkdev_path
[32] = { 0 };
1585 #ifdef UBIFS_EXTROOT
1589 if (!getenv("PREINIT"))
1593 ULOG_ERR("Usage: block extroot\n");
1600 /* enable LOG_INFO messages */
1601 ulog_threshold(LOG_INFO
);
1604 * Look for "rootfs_data". We will want to mount it and check for
1605 * extroot configuration.
1608 /* Start with looking for MTD partition */
1609 find_block_mtd("\"rootfs_data\"", blkdev_path
, sizeof(blkdev_path
));
1610 if (blkdev_path
[0]) {
1611 struct device
*dev
= find_block_device(NULL
, NULL
, blkdev_path
);
1612 if (dev
&& !strcmp(dev
->pr
->type
, "jffs2")) {
1613 char cfg
[] = "/tmp/jffs_cfg";
1616 * Mount MTD part and try extroot (using
1617 * /etc/config/fstab from that partition)
1620 if (!mount(blkdev_path
, cfg
, "jffs2", MS_NOATIME
, NULL
)) {
1621 err
= mount_extroot(cfg
);
1622 umount2(cfg
, MNT_DETACH
);
1625 rmdir("/tmp/overlay");
1631 #ifdef UBIFS_EXTROOT
1632 /* ... but it also could be an UBI volume */
1633 memset(blkdev_path
, 0, sizeof(blkdev_path
));
1634 libubi
= libubi_open();
1635 find_block_ubi(libubi
, "rootfs_data", blkdev_path
, sizeof(blkdev_path
));
1636 libubi_close(libubi
);
1637 if (blkdev_path
[0]) {
1638 char cfg
[] = "/tmp/ubifs_cfg";
1640 /* Mount volume and try extroot (using fstab from that vol) */
1642 if (!mount(blkdev_path
, cfg
, "ubifs", MS_NOATIME
, NULL
)) {
1643 err
= mount_extroot(cfg
);
1644 umount2(cfg
, MNT_DETACH
);
1647 rmdir("/tmp/overlay");
1653 return mount_extroot(NULL
);
1656 static int main_mount(int argc
, char **argv
)
1660 if (config_load(NULL
))
1664 vlist_for_each_element(&devices
, dev
, node
)
1665 mount_device(dev
, TYPE_DEV
);
1667 handle_swapfiles(true);
1672 static int main_umount(int argc
, char **argv
)
1675 struct probe_info
*pr
;
1678 if (config_load(NULL
))
1681 handle_swapfiles(false);
1686 all
= !strcmp(argv
[2], "-a");
1688 vlist_for_each_element_reverse(&devices
, dev
, node
) {
1692 if (!strcmp(pr
->type
, "swap"))
1696 if (m
&& m
->extroot
)
1699 umount_device(pr
->dev
, TYPE_DEV
, all
);
1705 static int main_detect(int argc
, char **argv
)
1710 printf("config 'global'\n");
1711 printf("\toption\tanon_swap\t'0'\n");
1712 printf("\toption\tanon_mount\t'0'\n");
1713 printf("\toption\tauto_swap\t'1'\n");
1714 printf("\toption\tauto_mount\t'1'\n");
1715 printf("\toption\tdelay_root\t'5'\n");
1716 printf("\toption\tcheck_fs\t'0'\n\n");
1717 vlist_for_each_element(&devices
, dev
, node
)
1718 print_block_uci(dev
->pr
);
1723 static int main_info(int argc
, char **argv
)
1730 vlist_for_each_element(&devices
, dev
, node
)
1731 print_block_info(dev
->pr
);
1736 for (i
= 2; i
< argc
; i
++) {
1739 if (stat(argv
[i
], &s
)) {
1740 ULOG_ERR("failed to stat %s\n", argv
[i
]);
1743 if (!S_ISBLK(s
.st_mode
) && !(S_ISCHR(s
.st_mode
) && major(s
.st_rdev
) == 250)) {
1744 ULOG_ERR("%s is not a block device\n", argv
[i
]);
1747 dev
= find_block_device(NULL
, NULL
, argv
[i
]);
1749 print_block_info(dev
->pr
);
1755 static int swapon_usage(void)
1757 fprintf(stderr
, "Usage: swapon [-s] [-a] [[-p pri] DEVICE]\n\n"
1758 "\tStart swapping on [DEVICE]\n"
1759 " -a\tStart swapping on all swap devices\n"
1760 " -p pri\tSet priority of swap device\n"
1761 " -s\tShow summary\n");
1765 static int main_swapon(int argc
, char **argv
)
1772 struct probe_info
*pr
;
1778 while ((ch
= getopt(argc
, argv
, "ap:s")) != -1) {
1781 fp
= fopen("/proc/swaps", "r");
1785 ULOG_ERR("failed to open /proc/swaps\n");
1788 while (getline(&lineptr
, &s
, fp
) > 0)
1789 printf("%s", lineptr
);
1796 vlist_for_each_element(&devices
, dev
, node
) {
1798 if (strcmp(pr
->type
, "swap"))
1800 if (swapon(pr
->dev
, 0))
1801 ULOG_ERR("failed to swapon %s\n", pr
->dev
);
1807 flags
= ((pri
<< SWAP_FLAG_PRIO_SHIFT
) & SWAP_FLAG_PRIO_MASK
) | SWAP_FLAG_PREFER
;
1810 return swapon_usage();
1814 if (optind
!= (argc
- 1))
1815 return swapon_usage();
1817 if (stat(argv
[optind
], &st
) || (!S_ISBLK(st
.st_mode
) && !S_ISREG(st
.st_mode
))) {
1818 ULOG_ERR("%s is not a block device or file\n", argv
[optind
]);
1821 err
= swapon(argv
[optind
], flags
);
1823 ULOG_ERR("failed to swapon %s (%d)\n", argv
[optind
], err
);
1830 static int main_swapoff(int argc
, char **argv
)
1833 ULOG_ERR("Usage: swapoff [-a] [DEVICE]\n\n"
1834 "\tStop swapping on DEVICE\n"
1835 " -a\tStop swapping on all swap devices\n");
1839 if (!strcmp(argv
[1], "-a")) {
1840 FILE *fp
= fopen("/proc/swaps", "r");
1844 ULOG_ERR("failed to open /proc/swaps\n");
1847 if (fgets(line
, sizeof(line
), fp
))
1848 while (fgets(line
, sizeof(line
), fp
)) {
1849 char *end
= strchr(line
, ' ');
1855 err
= swapoff(line
);
1857 ULOG_ERR("failed to swapoff %s (%d)\n", line
, err
);
1864 if (stat(argv
[1], &s
) || (!S_ISBLK(s
.st_mode
) && !S_ISREG(s
.st_mode
))) {
1865 ULOG_ERR("%s is not a block device or file\n", argv
[1]);
1868 err
= swapoff(argv
[1]);
1870 ULOG_ERR("failed to swapoff %s (%d)\n", argv
[1], err
);
1878 int main(int argc
, char **argv
)
1880 char *base
= basename(*argv
);
1884 ulog_open(-1, -1, "block");
1885 ulog_threshold(LOG_NOTICE
);
1887 if (!strcmp(base
, "swapon"))
1888 return main_swapon(argc
, argv
);
1890 if (!strcmp(base
, "swapoff"))
1891 return main_swapoff(argc
, argv
);
1893 if ((argc
> 1) && !strcmp(base
, "block")) {
1894 if (!strcmp(argv
[1], "info"))
1895 return main_info(argc
, argv
);
1897 if (!strcmp(argv
[1], "detect"))
1898 return main_detect(argc
, argv
);
1900 if (!strcmp(argv
[1], "hotplug"))
1901 return main_hotplug(argc
, argv
);
1903 if (!strcmp(argv
[1], "autofs"))
1904 return main_autofs(argc
, argv
);
1906 if (!strcmp(argv
[1], "extroot"))
1907 return main_extroot(argc
, argv
);
1909 if (!strcmp(argv
[1], "mount"))
1910 return main_mount(argc
, argv
);
1912 if (!strcmp(argv
[1], "umount"))
1913 return main_umount(argc
, argv
);
1915 if (!strcmp(argv
[1], "remount")) {
1916 int ret
= main_umount(argc
, argv
);
1919 ret
= main_mount(argc
, argv
);
1924 ULOG_ERR("Usage: block <info|mount|umount|detect>\n");