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 #include "libubi/libubi.h"
59 struct vlist_node node
;
75 static struct vlist_tree mounts
;
76 static struct blob_buf b
;
77 static LIST_HEAD(devices
);
78 static int anon_mount
, anon_swap
, auto_mount
, auto_swap
, check_fs
;
79 static unsigned int delay_root
;
91 static const struct blobmsg_policy config_policy
[__CFG_MAX
] = {
92 [CFG_ANON_SWAP
] = { .name
= "anon_swap", .type
= BLOBMSG_TYPE_INT32
},
93 [CFG_ANON_MOUNT
] = { .name
= "anon_mount", .type
= BLOBMSG_TYPE_INT32
},
94 [CFG_AUTO_SWAP
] = { .name
= "auto_swap", .type
= BLOBMSG_TYPE_INT32
},
95 [CFG_AUTO_MOUNT
] = { .name
= "auto_mount", .type
= BLOBMSG_TYPE_INT32
},
96 [CFG_DELAY_ROOT
] = { .name
= "delay_root", .type
= BLOBMSG_TYPE_INT32
},
97 [CFG_CHECK_FS
] = { .name
= "check_fs", .type
= BLOBMSG_TYPE_INT32
},
110 static const struct uci_blob_param_list config_attr_list
= {
111 .n_params
= __CFG_MAX
,
112 .params
= config_policy
,
115 static const struct blobmsg_policy mount_policy
[__MOUNT_MAX
] = {
116 [MOUNT_UUID
] = { .name
= "uuid", .type
= BLOBMSG_TYPE_STRING
},
117 [MOUNT_LABEL
] = { .name
= "label", .type
= BLOBMSG_TYPE_STRING
},
118 [MOUNT_DEVICE
] = { .name
= "device", .type
= BLOBMSG_TYPE_STRING
},
119 [MOUNT_TARGET
] = { .name
= "target", .type
= BLOBMSG_TYPE_STRING
},
120 [MOUNT_OPTIONS
] = { .name
= "options", .type
= BLOBMSG_TYPE_STRING
},
121 [MOUNT_ENABLE
] = { .name
= "enabled", .type
= BLOBMSG_TYPE_INT32
},
124 static const struct uci_blob_param_list mount_attr_list
= {
125 .n_params
= __MOUNT_MAX
,
126 .params
= mount_policy
,
138 static const struct blobmsg_policy swap_policy
[__SWAP_MAX
] = {
139 [SWAP_ENABLE
] = { .name
= "enabled", .type
= BLOBMSG_TYPE_INT32
},
140 [SWAP_UUID
] = { .name
= "uuid", .type
= BLOBMSG_TYPE_STRING
},
141 [SWAP_LABEL
] = { .name
= "label", .type
= BLOBMSG_TYPE_STRING
},
142 [SWAP_DEVICE
] = { .name
= "device", .type
= BLOBMSG_TYPE_STRING
},
143 [SWAP_PRIO
] = { .name
= "priority", .type
= BLOBMSG_TYPE_INT32
},
146 static const struct uci_blob_param_list swap_attr_list
= {
147 .n_params
= __SWAP_MAX
,
148 .params
= swap_policy
,
156 static const struct mount_flag mount_flags
[] = {
157 { "sync", MS_SYNCHRONOUS
},
158 { "async", ~MS_SYNCHRONOUS
},
159 { "dirsync", MS_DIRSYNC
},
160 { "mand", MS_MANDLOCK
},
161 { "nomand", ~MS_MANDLOCK
},
162 { "atime", ~MS_NOATIME
},
163 { "noatime", MS_NOATIME
},
164 { "dev", ~MS_NODEV
},
165 { "nodev", MS_NODEV
},
166 { "diratime", ~MS_NODIRATIME
},
167 { "nodiratime", MS_NODIRATIME
},
168 { "exec", ~MS_NOEXEC
},
169 { "noexec", MS_NOEXEC
},
170 { "suid", ~MS_NOSUID
},
171 { "nosuid", MS_NOSUID
},
172 { "rw", ~MS_RDONLY
},
174 { "relatime", MS_RELATIME
},
175 { "norelatime", ~MS_RELATIME
},
176 { "strictatime", MS_STRICTATIME
},
177 { "acl", MS_POSIXACL
},
178 { "noacl", ~MS_POSIXACL
},
179 { "nouser_xattr", MS_NOUSER
},
180 { "user_xattr", ~MS_NOUSER
},
183 static char *blobmsg_get_strdup(struct blob_attr
*attr
)
188 return strdup(blobmsg_get_string(attr
));
191 static char *blobmsg_get_basename(struct blob_attr
*attr
)
196 return strdup(basename(blobmsg_get_string(attr
)));
199 static void parse_mount_options(struct mount
*m
, char *optstr
)
203 char *p
, *opts
, *last
;
208 if (!optstr
|| !*optstr
)
211 m
->options
= opts
= calloc(1, strlen(optstr
) + 1);
224 for (i
= 0, is_flag
= false; i
< ARRAY_SIZE(mount_flags
); i
++) {
225 if (!strcmp(last
, mount_flags
[i
].name
)) {
226 if (mount_flags
[i
].flag
< 0)
227 m
->flags
&= (uint32_t)mount_flags
[i
].flag
;
229 m
->flags
|= (uint32_t)mount_flags
[i
].flag
;
236 opts
+= sprintf(opts
, "%s%s", (opts
> m
->options
) ? "," : "", last
);
245 static int mount_add(struct uci_section
*s
)
247 struct blob_attr
*tb
[__MOUNT_MAX
] = { 0 };
250 blob_buf_init(&b
, 0);
251 uci_to_blob(&b
, s
, &mount_attr_list
);
252 blobmsg_parse(mount_policy
, __MOUNT_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
254 if (!tb
[MOUNT_LABEL
] && !tb
[MOUNT_UUID
] && !tb
[MOUNT_DEVICE
])
257 if (tb
[MOUNT_ENABLE
] && !blobmsg_get_u32(tb
[MOUNT_ENABLE
]))
260 m
= malloc(sizeof(struct mount
));
261 m
->type
= TYPE_MOUNT
;
262 m
->uuid
= blobmsg_get_strdup(tb
[MOUNT_UUID
]);
263 m
->label
= blobmsg_get_strdup(tb
[MOUNT_LABEL
]);
264 m
->target
= blobmsg_get_strdup(tb
[MOUNT_TARGET
]);
265 m
->device
= blobmsg_get_basename(tb
[MOUNT_DEVICE
]);
267 parse_mount_options(m
, blobmsg_get_strdup(tb
[MOUNT_OPTIONS
]));
269 m
->overlay
= m
->extroot
= 0;
270 if (m
->target
&& !strcmp(m
->target
, "/"))
272 if (m
->target
&& !strcmp(m
->target
, "/overlay"))
273 m
->extroot
= m
->overlay
= 1;
275 if (m
->target
&& *m
->target
!= '/') {
276 ULOG_WARN("ignoring mount section %s due to invalid target '%s'\n",
277 s
->e
.name
, m
->target
);
283 vlist_add(&mounts
, &m
->node
, m
->uuid
);
285 vlist_add(&mounts
, &m
->node
, m
->label
);
287 vlist_add(&mounts
, &m
->node
, m
->device
);
292 static int swap_add(struct uci_section
*s
)
294 struct blob_attr
*tb
[__SWAP_MAX
] = { 0 };
297 blob_buf_init(&b
, 0);
298 uci_to_blob(&b
, s
, &swap_attr_list
);
299 blobmsg_parse(swap_policy
, __SWAP_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
301 if (!tb
[SWAP_UUID
] && !tb
[SWAP_LABEL
] && !tb
[SWAP_DEVICE
])
304 m
= malloc(sizeof(struct mount
));
305 memset(m
, 0, sizeof(struct mount
));
307 m
->uuid
= blobmsg_get_strdup(tb
[SWAP_UUID
]);
308 m
->label
= blobmsg_get_strdup(tb
[SWAP_LABEL
]);
309 m
->device
= blobmsg_get_basename(tb
[SWAP_DEVICE
]);
311 m
->prio
= blobmsg_get_u32(tb
[SWAP_PRIO
]);
313 m
->prio
= ((m
->prio
<< SWAP_FLAG_PRIO_SHIFT
) & SWAP_FLAG_PRIO_MASK
) | SWAP_FLAG_PREFER
;
315 if ((!tb
[SWAP_ENABLE
]) || blobmsg_get_u32(tb
[SWAP_ENABLE
])) {
316 /* store complete swap path */
318 m
->target
= blobmsg_get_strdup(tb
[SWAP_DEVICE
]);
321 vlist_add(&mounts
, &m
->node
, m
->uuid
);
323 vlist_add(&mounts
, &m
->node
, m
->label
);
325 vlist_add(&mounts
, &m
->node
, m
->device
);
331 static int global_add(struct uci_section
*s
)
333 struct blob_attr
*tb
[__CFG_MAX
] = { 0 };
335 blob_buf_init(&b
, 0);
336 uci_to_blob(&b
, s
, &config_attr_list
);
337 blobmsg_parse(config_policy
, __CFG_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
339 if ((tb
[CFG_ANON_MOUNT
]) && blobmsg_get_u32(tb
[CFG_ANON_MOUNT
]))
341 if ((tb
[CFG_ANON_SWAP
]) && blobmsg_get_u32(tb
[CFG_ANON_SWAP
]))
344 if ((tb
[CFG_AUTO_MOUNT
]) && blobmsg_get_u32(tb
[CFG_AUTO_MOUNT
]))
346 if ((tb
[CFG_AUTO_SWAP
]) && blobmsg_get_u32(tb
[CFG_AUTO_SWAP
]))
349 if (tb
[CFG_DELAY_ROOT
])
350 delay_root
= blobmsg_get_u32(tb
[CFG_DELAY_ROOT
]);
352 if ((tb
[CFG_CHECK_FS
]) && blobmsg_get_u32(tb
[CFG_CHECK_FS
]))
358 static struct mount
* find_swap(const char *uuid
, const char *label
, const char *device
)
362 vlist_for_each_element(&mounts
, m
, node
) {
363 if (m
->type
!= TYPE_SWAP
)
365 if (uuid
&& m
->uuid
&& !strcasecmp(m
->uuid
, uuid
))
367 if (label
&& m
->label
&& !strcmp(m
->label
, label
))
369 if (device
&& m
->device
&& !strcmp(m
->device
, device
))
376 static struct mount
* find_block(const char *uuid
, const char *label
, const char *device
,
381 vlist_for_each_element(&mounts
, m
, node
) {
382 if (m
->type
!= TYPE_MOUNT
)
384 if (m
->uuid
&& uuid
&& !strcasecmp(m
->uuid
, uuid
))
386 if (m
->label
&& label
&& !strcmp(m
->label
, label
))
388 if (m
->target
&& target
&& !strcmp(m
->target
, target
))
390 if (m
->device
&& device
&& !strcmp(m
->device
, device
))
397 static void mounts_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
398 struct vlist_node
*node_old
)
402 static struct uci_package
* config_try_load(struct uci_context
*ctx
, char *path
)
404 char *file
= basename(path
);
405 char *dir
= dirname(path
);
407 struct uci_package
*pkg
;
409 uci_set_confdir(ctx
, dir
);
410 ULOG_INFO("attempting to load %s/%s\n", dir
, file
);
412 if (uci_load(ctx
, file
, &pkg
)) {
413 uci_get_errorstr(ctx
, &err
, file
);
414 ULOG_ERR("unable to load configuration (%s)\n", err
);
423 static int config_load(char *cfg
)
425 struct uci_context
*ctx
= uci_alloc_context();
426 struct uci_package
*pkg
= NULL
;
427 struct uci_element
*e
;
430 vlist_init(&mounts
, avl_strcmp
, mounts_update
);
433 snprintf(path
, sizeof(path
), "%s/upper/etc/config/fstab", cfg
);
434 pkg
= config_try_load(ctx
, path
);
437 snprintf(path
, sizeof(path
), "%s/etc/config/fstab", cfg
);
438 pkg
= config_try_load(ctx
, path
);
443 snprintf(path
, sizeof(path
), "/etc/config/fstab");
444 pkg
= config_try_load(ctx
, path
);
448 ULOG_ERR("no usable configuration\n");
452 vlist_update(&mounts
);
453 uci_foreach_element(&pkg
->sections
, e
) {
454 struct uci_section
*s
= uci_to_section(e
);
456 if (!strcmp(s
->type
, "mount"))
458 if (!strcmp(s
->type
, "swap"))
460 if (!strcmp(s
->type
, "global"))
463 vlist_flush(&mounts
);
468 static struct probe_info
* _probe_path(char *path
)
470 struct probe_info
*pr
;
473 /* skip ubi device if ubiblock device is present */
474 if (path
[5] == 'u' && path
[6] == 'b' && path
[7] == 'i' &&
475 path
[8] >= '0' && path
[8] <= '9' ) {
476 snprintf(tmppath
, sizeof(tmppath
), "/dev/ubiblock%s", path
+ 8);
477 list_for_each_entry(pr
, &devices
, list
)
478 if (!strcasecmp(pr
->dev
, tmppath
))
482 return probe_path(path
);
485 static int _cache_load(const char *path
)
487 int gl_flags
= GLOB_NOESCAPE
| GLOB_MARK
;
491 if (glob(path
, gl_flags
, NULL
, &gl
) < 0)
494 for (j
= 0; j
< gl
.gl_pathc
; j
++) {
495 struct probe_info
*pr
= _probe_path(gl
.gl_pathv
[j
]);
497 list_add_tail(&pr
->list
, &devices
);
505 static void cache_load(int mtd
)
508 _cache_load("/dev/mtdblock*");
509 _cache_load("/dev/ubiblock*");
510 _cache_load("/dev/ubi[0-9]*");
512 _cache_load("/dev/loop*");
513 _cache_load("/dev/mmcblk*");
514 _cache_load("/dev/sd*");
515 _cache_load("/dev/hd*");
516 _cache_load("/dev/md*");
517 _cache_load("/dev/vd*");
518 _cache_load("/dev/mapper/*");
522 static int print_block_uci(struct probe_info
*pr
)
524 if (!strcmp(pr
->type
, "swap")) {
525 printf("config 'swap'\n");
527 printf("config 'mount'\n");
528 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr
->dev
));
531 printf("\toption\tuuid\t'%s'\n", pr
->uuid
);
533 printf("\toption\tdevice\t'%s'\n", pr
->dev
);
534 printf("\toption\tenabled\t'0'\n\n");
539 static struct probe_info
* find_block_info(char *uuid
, char *label
, char *path
)
541 struct probe_info
*pr
= NULL
;
544 list_for_each_entry(pr
, &devices
, list
)
545 if (pr
->uuid
&& !strcasecmp(pr
->uuid
, uuid
))
549 list_for_each_entry(pr
, &devices
, list
)
550 if (pr
->label
&& !strcmp(pr
->label
, label
))
554 list_for_each_entry(pr
, &devices
, list
)
555 if (pr
->dev
&& !strcmp(basename(pr
->dev
), basename(path
)))
561 static char* find_mount_point(char *block
)
563 FILE *fp
= fopen("/proc/self/mountinfo", "r");
564 static char line
[256];
565 int len
= strlen(block
);
566 char *point
= NULL
, *pos
, *tmp
, *cpoint
, *devname
;
569 unsigned int minor
, major
;
574 rstat
= stat(block
, &s
);
576 while (fgets(line
, sizeof(line
), fp
)) {
577 pos
= strchr(line
, ' ');
581 pos
= strchr(pos
+ 1, ' ');
586 pos
= strchr(pos
, ':');
593 pos
= strchr(pos
, ' ');
599 pos
= strchr(pos
+ 1, ' ');
604 pos
= strchr(pos
, ' ');
610 pos
= strchr(pos
+ 1, ' ');
614 pos
= strchr(pos
+ 1, ' ');
618 pos
= strchr(pos
+ 1, ' ');
623 pos
= strchr(pos
, ' ');
629 if (!strncmp(block
, devname
, len
)) {
630 point
= strdup(cpoint
);
637 if (!S_ISBLK(s
.st_mode
))
640 if (major
== major(s
.st_rdev
) &&
641 minor
== minor(s
.st_rdev
)) {
642 point
= strdup(cpoint
);
652 static int print_block_info(struct probe_info
*pr
)
656 mp
= find_mount_point(pr
->dev
);
657 printf("%s:", pr
->dev
);
659 printf(" UUID=\"%s\"", pr
->uuid
);
662 printf(" LABEL=\"%s\"", pr
->label
);
665 printf(" VERSION=\"%s\"", pr
->version
);
668 printf(" MOUNT=\"%s\"", mp
);
672 printf(" TYPE=\"%s\"\n", pr
->type
);
677 static void mkdir_p(char *dir
)
679 char *l
= strrchr(dir
, '/');
689 static void check_filesystem(struct probe_info
*pr
)
693 const char *e2fsck
= "/usr/sbin/e2fsck";
694 const char *f2fsck
= "/usr/sbin/fsck.f2fs";
695 const char *dosfsck
= "/usr/sbin/dosfsck";
698 /* UBIFS does not need stuff like fsck */
699 if (!strncmp(pr
->type
, "ubifs", 5))
702 if (!strncmp(pr
->type
, "vfat", 4)) {
704 } else if (!strncmp(pr
->type
, "f2fs", 4)) {
706 } else if (!strncmp(pr
->type
, "ext", 3)) {
709 ULOG_ERR("check_filesystem: %s is not supported\n", pr
->type
);
713 if (stat(ckfs
, &statbuf
) < 0) {
714 ULOG_ERR("check_filesystem: %s not found\n", ckfs
);
720 if(!strncmp(pr
->type
, "f2fs", 4)) {
721 execl(ckfs
, ckfs
, "-f", pr
->dev
, NULL
);
724 execl(ckfs
, ckfs
, "-p", pr
->dev
, NULL
);
727 } else if (pid
> 0) {
730 waitpid(pid
, &status
, 0);
731 if (WEXITSTATUS(status
))
732 ULOG_ERR("check_filesystem: %s returned %d\n", ckfs
, WEXITSTATUS(status
));
736 static void handle_swapfiles(bool on
)
740 struct probe_info
*pr
;
742 vlist_for_each_element(&mounts
, m
, node
)
744 if (m
->type
!= TYPE_SWAP
|| !m
->target
)
747 if (stat(m
->target
, &s
) || !S_ISREG(s
.st_mode
))
750 pr
= _probe_path(m
->target
);
755 if (!strcmp(pr
->type
, "swap")) {
757 swapon(pr
->dev
, m
->prio
);
766 static void to_devnull(int fd
)
768 int devnull
= open("/dev/null", fd
? O_WRONLY
: O_RDONLY
);
773 if (devnull
> STDERR_FILENO
)
777 static int exec_mount(const char *source
, const char *target
,
778 const char *fstype
, const char *options
)
783 int err
, status
, pfds
[2];
784 char errmsg
[128], cmd
[sizeof("/sbin/mount.XXXXXXXXXXXXXXXX\0")];
786 snprintf(cmd
, sizeof(cmd
), "/sbin/mount.%s", fstype
);
788 if (stat(cmd
, &s
) < 0 || !S_ISREG(s
.st_mode
) || !(s
.st_mode
& S_IXUSR
)) {
789 ULOG_ERR("No \"mount.%s\" utility available\n", fstype
);
796 fcntl(pfds
[0], F_SETFD
, fcntl(pfds
[0], F_GETFD
) | FD_CLOEXEC
);
797 fcntl(pfds
[1], F_SETFD
, fcntl(pfds
[1], F_GETFD
) | FD_CLOEXEC
);
809 to_devnull(STDIN_FILENO
);
810 to_devnull(STDOUT_FILENO
);
812 dup2(pfds
[1], STDERR_FILENO
);
816 if (options
&& *options
)
817 execl(cmd
, cmd
, "-o", options
, source
, target
, NULL
);
819 execl(cmd
, cmd
, source
, target
, NULL
);
826 mount_fd
= fdopen(pfds
[0], "r");
828 while (fgets(errmsg
, sizeof(errmsg
), mount_fd
))
829 ULOG_ERR("mount.%s: %s", fstype
, errmsg
);
833 err
= waitpid(pid
, &status
, 0);
837 ULOG_ERR("mount.%s: failed with status %d\n", fstype
, status
);
852 static int handle_mount(const char *source
, const char *target
,
853 const char *fstype
, struct mount
*m
)
856 size_t mount_opts_len
;
857 char *mount_opts
= NULL
, *ptr
;
859 err
= mount(source
, target
, fstype
, m
? m
->flags
: 0,
860 (m
&& m
->options
) ? m
->options
: "");
862 /* Requested file system type is not available in kernel,
863 attempt to call mount helper. */
864 if (err
== -1 && errno
== ENODEV
) {
866 /* Convert mount flags back into string representation,
867 first calculate needed length of string buffer... */
868 mount_opts_len
= 1 + (m
->options
? strlen(m
->options
) : 0);
870 for (i
= 0; i
< ARRAY_SIZE(mount_flags
); i
++)
871 if ((mount_flags
[i
].flag
> 0) &&
872 (mount_flags
[i
].flag
< INT_MAX
) &&
873 (m
->flags
& (uint32_t)mount_flags
[i
].flag
))
874 mount_opts_len
+= strlen(mount_flags
[i
].name
) + 1;
876 /* ... then now allocate and fill it ... */
877 ptr
= mount_opts
= calloc(1, mount_opts_len
);
885 ptr
+= sprintf(ptr
, "%s,", m
->options
);
887 for (i
= 0; i
< ARRAY_SIZE(mount_flags
); i
++)
888 if ((mount_flags
[i
].flag
> 0) &&
889 (mount_flags
[i
].flag
< INT_MAX
) &&
890 (m
->flags
& (uint32_t)mount_flags
[i
].flag
))
891 ptr
+= sprintf(ptr
, "%s,", mount_flags
[i
].name
);
893 mount_opts
[mount_opts_len
- 1] = 0;
896 /* ... and now finally invoke the external mount program */
897 err
= exec_mount(source
, target
, fstype
, mount_opts
);
903 static int mount_device(struct probe_info
*pr
, int hotplug
)
912 device
= basename(pr
->dev
);
914 if (!strcmp(pr
->type
, "swap")) {
915 if (hotplug
&& !auto_swap
)
917 m
= find_swap(pr
->uuid
, pr
->label
, device
);
919 swapon(pr
->dev
, (m
) ? (m
->prio
) : (0));
924 if (hotplug
&& !auto_mount
)
927 mp
= find_mount_point(pr
->dev
);
929 ULOG_ERR("%s is already mounted on %s\n", pr
->dev
, mp
);
934 m
= find_block(pr
->uuid
, pr
->label
, device
, NULL
);
939 char *target
= m
->target
;
944 snprintf(_target
, sizeof(_target
), "/mnt/%s", device
);
950 check_filesystem(pr
);
952 err
= handle_mount(pr
->dev
, target
, pr
->type
, m
);
954 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %s\n",
955 pr
->dev
, pr
->type
, target
, errno
, strerror(errno
));
957 handle_swapfiles(true);
965 snprintf(target
, sizeof(target
), "/mnt/%s", device
);
969 check_filesystem(pr
);
971 err
= handle_mount(pr
->dev
, target
, pr
->type
, NULL
);
973 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %s\n",
974 pr
->dev
, pr
->type
, target
, errno
, strerror(errno
));
976 handle_swapfiles(true);
983 static int umount_device(struct probe_info
*pr
)
986 char *device
= basename(pr
->dev
);
993 if (!strcmp(pr
->type
, "swap"))
996 mp
= find_mount_point(pr
->dev
);
1000 m
= find_block(pr
->uuid
, pr
->label
, device
, NULL
);
1001 if (m
&& m
->extroot
)
1004 err
= umount2(mp
, MNT_DETACH
);
1006 ULOG_ERR("unmounting %s (%s) failed (%d) - %s\n",
1007 pr
->dev
, mp
, errno
, strerror(errno
));
1009 ULOG_INFO("unmounted %s (%s)\n",
1016 static int main_hotplug(int argc
, char **argv
)
1019 char *action
, *device
, *mount_point
;
1021 action
= getenv("ACTION");
1022 device
= getenv("DEVNAME");
1024 if (!action
|| !device
)
1026 snprintf(path
, sizeof(path
), "/dev/%s", device
);
1028 if (!strcmp(action
, "remove")) {
1030 mount_point
= find_mount_point(path
);
1032 err
= umount2(mount_point
, MNT_DETACH
);
1035 ULOG_ERR("umount of %s failed (%d) - %s\n",
1036 mount_point
, errno
, strerror(errno
));
1040 } else if (strcmp(action
, "add")) {
1041 ULOG_ERR("Unkown action %s\n", action
);
1046 if (config_load(NULL
))
1050 return mount_device(find_block_info(NULL
, NULL
, path
), 1);
1053 static int find_block_mtd(char *name
, char *part
, int plen
)
1055 FILE *fp
= fopen("/proc/mtd", "r");
1056 static char line
[256];
1062 while (!index
&& fgets(line
, sizeof(line
), fp
)) {
1063 if (strstr(line
, name
)) {
1064 char *eol
= strstr(line
, ":");
1079 snprintf(part
, plen
, "/dev/mtdblock%s", index
);
1084 #ifdef UBIFS_EXTROOT
1085 static int find_ubi_vol(libubi_t libubi
, char *name
, int *dev_num
, int *vol_id
)
1089 while (ubi_dev_present(libubi
, dev
))
1091 struct ubi_dev_info dev_info
;
1092 struct ubi_vol_info vol_info
;
1094 if (ubi_get_dev_info1(libubi
, dev
++, &dev_info
))
1096 if (ubi_get_vol_info1_nm(libubi
, dev_info
.dev_num
, name
, &vol_info
))
1099 *dev_num
= dev_info
.dev_num
;
1100 *vol_id
= vol_info
.vol_id
;
1108 static int find_block_ubi(libubi_t libubi
, char *name
, char *part
, int plen
)
1114 err
= find_ubi_vol(libubi
, name
, &dev_num
, &vol_id
);
1116 snprintf(part
, plen
, "/dev/ubi%d_%d", dev_num
, vol_id
);
1121 static int find_block_ubi_RO(libubi_t libubi
, char *name
, char *part
, int plen
)
1127 err
= find_ubi_vol(libubi
, name
, &dev_num
, &vol_id
);
1129 snprintf(part
, plen
, "/dev/ubiblock%d_%d", dev_num
, vol_id
);
1136 static int find_root_dev(char *buf
, int len
)
1146 if (!(d
= opendir("/dev")))
1151 while ((e
= readdir(d
)) != NULL
) {
1152 snprintf(buf
, len
, "/dev/%s", e
->d_name
);
1154 if (stat(buf
, &s
) || s
.st_rdev
!= root
)
1167 static int test_fs_support(const char *name
)
1173 if ((f
= fopen("/proc/filesystems", "r")) != NULL
) {
1174 while (fgets(line
, sizeof(line
), f
)) {
1175 p
= strtok(line
, "\t\n");
1177 if (p
&& !strcmp(p
, "nodev"))
1178 p
= strtok(NULL
, "\t\n");
1180 if (p
&& !strcmp(p
, name
)) {
1191 static int check_extroot(char *path
)
1193 struct probe_info
*pr
= NULL
;
1196 #ifdef UBIFS_EXTROOT
1197 if (find_block_mtd("\"rootfs\"", devpath
, sizeof(devpath
))) {
1201 libubi
= libubi_open();
1202 err
= find_block_ubi_RO(libubi
, "rootfs", devpath
, sizeof(devpath
));
1203 libubi_close(libubi
);
1208 if (find_block_mtd("\"rootfs\"", devpath
, sizeof(devpath
))) {
1209 if (find_root_dev(devpath
, sizeof(devpath
))) {
1210 ULOG_ERR("extroot: unable to determine root device\n");
1216 list_for_each_entry(pr
, &devices
, list
) {
1217 if (!strcmp(pr
->dev
, devpath
)) {
1221 char uuid
[64] = { 0 };
1223 snprintf(tag
, sizeof(tag
), "%s/etc", path
);
1227 snprintf(tag
, sizeof(tag
), "%s/etc/.extroot-uuid", path
);
1228 if (stat(tag
, &s
)) {
1229 fp
= fopen(tag
, "w+");
1231 ULOG_ERR("extroot: failed to write UUID to %s: %d (%s)\n",
1232 tag
, errno
, strerror(errno
));
1233 /* return 0 to continue boot regardless of error */
1236 fputs(pr
->uuid
, fp
);
1241 fp
= fopen(tag
, "r");
1243 ULOG_ERR("extroot: failed to read UUID from %s: %d (%s)\n",
1244 tag
, errno
, strerror(errno
));
1248 if (!fgets(uuid
, sizeof(uuid
), fp
))
1249 ULOG_ERR("extroot: failed to read UUID from %s: %d (%s)\n",
1250 tag
, errno
, strerror(errno
));
1253 if (*uuid
&& !strcasecmp(uuid
, pr
->uuid
))
1256 ULOG_ERR("extroot: UUID mismatch (root: %s, %s: %s)\n",
1257 pr
->uuid
, basename(path
), uuid
);
1262 ULOG_ERR("extroot: unable to lookup root device %s\n", devpath
);
1267 * Read info about extroot from UCI (using prefix) and mount it.
1269 static int mount_extroot(char *cfg
)
1271 char overlay
[] = "/tmp/extroot/overlay";
1272 char mnt
[] = "/tmp/extroot/mnt";
1274 struct probe_info
*pr
;
1278 /* Load @cfg/etc/config/fstab */
1279 if (config_load(cfg
))
1282 /* See if there is extroot-specific mount config */
1283 m
= find_block(NULL
, NULL
, NULL
, "/");
1285 m
= find_block(NULL
, NULL
, NULL
, "/overlay");
1287 if (!m
|| !m
->extroot
)
1289 ULOG_INFO("extroot: not configured\n");
1293 /* Find block device pointed by the mount config */
1294 pr
= find_block_info(m
->uuid
, m
->label
, m
->device
);
1296 if (!pr
&& delay_root
){
1297 ULOG_INFO("extroot: device not present, retrying in %u seconds\n", delay_root
);
1301 pr
= find_block_info(m
->uuid
, m
->label
, m
->device
);
1304 if (strncmp(pr
->type
, "ext", 3) &&
1305 strncmp(pr
->type
, "f2fs", 4) &&
1306 strncmp(pr
->type
, "ubifs", 5)) {
1307 ULOG_ERR("extroot: unsupported filesystem %s, try ext4, f2fs or ubifs\n", pr
->type
);
1311 if (test_fs_support(pr
->type
)) {
1312 ULOG_ERR("extroot: filesystem %s not supported by kernel\n", pr
->type
);
1321 check_filesystem(pr
);
1323 err
= mount(pr
->dev
, path
, pr
->type
, m
->flags
,
1324 (m
->options
) ? (m
->options
) : (""));
1327 ULOG_ERR("extroot: mounting %s (%s) on %s failed: %d (%s)\n",
1328 pr
->dev
, pr
->type
, path
, errno
, strerror(errno
));
1329 } else if (m
->overlay
) {
1330 err
= check_extroot(path
);
1335 ULOG_ERR("extroot: cannot find device %s%s\n",
1336 (m
->uuid
? "with UUID " : (m
->label
? "with label " : "")),
1337 (m
->uuid
? m
->uuid
: (m
->label
? m
->label
: m
->device
)));
1343 static int main_extroot(int argc
, char **argv
)
1345 struct probe_info
*pr
;
1346 char blkdev_path
[32] = { 0 };
1348 #ifdef UBIFS_EXTROOT
1352 if (!getenv("PREINIT"))
1356 ULOG_ERR("Usage: block extroot\n");
1363 /* enable LOG_INFO messages */
1364 ulog_threshold(LOG_INFO
);
1367 * Look for "rootfs_data". We will want to mount it and check for
1368 * extroot configuration.
1371 /* Start with looking for MTD partition */
1372 find_block_mtd("\"rootfs_data\"", blkdev_path
, sizeof(blkdev_path
));
1373 if (blkdev_path
[0]) {
1374 pr
= find_block_info(NULL
, NULL
, blkdev_path
);
1375 if (pr
&& !strcmp(pr
->type
, "jffs2")) {
1376 char cfg
[] = "/tmp/jffs_cfg";
1379 * Mount MTD part and try extroot (using
1380 * /etc/config/fstab from that partition)
1383 if (!mount(blkdev_path
, cfg
, "jffs2", MS_NOATIME
, NULL
)) {
1384 err
= mount_extroot(cfg
);
1385 umount2(cfg
, MNT_DETACH
);
1388 rmdir("/tmp/overlay");
1394 #ifdef UBIFS_EXTROOT
1395 /* ... but it also could be an UBI volume */
1396 memset(blkdev_path
, 0, sizeof(blkdev_path
));
1397 libubi
= libubi_open();
1398 find_block_ubi(libubi
, "rootfs_data", blkdev_path
, sizeof(blkdev_path
));
1399 libubi_close(libubi
);
1400 if (blkdev_path
[0]) {
1401 char cfg
[] = "/tmp/ubifs_cfg";
1403 /* Mount volume and try extroot (using fstab from that vol) */
1405 if (!mount(blkdev_path
, cfg
, "ubifs", MS_NOATIME
, NULL
)) {
1406 err
= mount_extroot(cfg
);
1407 umount2(cfg
, MNT_DETACH
);
1410 rmdir("/tmp/overlay");
1416 return mount_extroot(NULL
);
1419 static int main_mount(int argc
, char **argv
)
1421 struct probe_info
*pr
;
1423 if (config_load(NULL
))
1427 list_for_each_entry(pr
, &devices
, list
)
1428 mount_device(pr
, 0);
1430 handle_swapfiles(true);
1435 static int main_umount(int argc
, char **argv
)
1437 struct probe_info
*pr
;
1439 if (config_load(NULL
))
1442 handle_swapfiles(false);
1445 list_for_each_entry(pr
, &devices
, list
)
1451 static int main_detect(int argc
, char **argv
)
1453 struct probe_info
*pr
;
1456 printf("config 'global'\n");
1457 printf("\toption\tanon_swap\t'0'\n");
1458 printf("\toption\tanon_mount\t'0'\n");
1459 printf("\toption\tauto_swap\t'1'\n");
1460 printf("\toption\tauto_mount\t'1'\n");
1461 printf("\toption\tdelay_root\t'5'\n");
1462 printf("\toption\tcheck_fs\t'0'\n\n");
1463 list_for_each_entry(pr
, &devices
, list
)
1464 print_block_uci(pr
);
1469 static int main_info(int argc
, char **argv
)
1472 struct probe_info
*pr
;
1476 list_for_each_entry(pr
, &devices
, list
)
1477 print_block_info(pr
);
1482 for (i
= 2; i
< argc
; i
++) {
1485 if (stat(argv
[i
], &s
)) {
1486 ULOG_ERR("failed to stat %s\n", argv
[i
]);
1489 if (!S_ISBLK(s
.st_mode
) && !(S_ISCHR(s
.st_mode
) && major(s
.st_rdev
) == 250)) {
1490 ULOG_ERR("%s is not a block device\n", argv
[i
]);
1493 pr
= find_block_info(NULL
, NULL
, argv
[i
]);
1495 print_block_info(pr
);
1501 static int swapon_usage(void)
1503 fprintf(stderr
, "Usage: swapon [-s] [-a] [[-p pri] DEVICE]\n\n"
1504 "\tStart swapping on [DEVICE]\n"
1505 " -a\tStart swapping on all swap devices\n"
1506 " -p pri\tSet priority of swap device\n"
1507 " -s\tShow summary\n");
1511 static int main_swapon(int argc
, char **argv
)
1517 struct probe_info
*pr
;
1523 while ((ch
= getopt(argc
, argv
, "ap:s")) != -1) {
1526 fp
= fopen("/proc/swaps", "r");
1530 ULOG_ERR("failed to open /proc/swaps\n");
1533 while (getline(&lineptr
, &s
, fp
) > 0)
1534 printf("%s", lineptr
);
1541 list_for_each_entry(pr
, &devices
, list
) {
1542 if (strcmp(pr
->type
, "swap"))
1544 if (swapon(pr
->dev
, 0))
1545 ULOG_ERR("failed to swapon %s\n", pr
->dev
);
1551 flags
= ((pri
<< SWAP_FLAG_PRIO_SHIFT
) & SWAP_FLAG_PRIO_MASK
) | SWAP_FLAG_PREFER
;
1554 return swapon_usage();
1559 if (optind
!= (argc
- 1))
1560 return swapon_usage();
1562 if (stat(argv
[optind
], &st
) || (!S_ISBLK(st
.st_mode
) && !S_ISREG(st
.st_mode
))) {
1563 ULOG_ERR("%s is not a block device or file\n", argv
[optind
]);
1566 err
= swapon(argv
[optind
], flags
);
1568 ULOG_ERR("failed to swapon %s (%d)\n", argv
[optind
], err
);
1575 static int main_swapoff(int argc
, char **argv
)
1578 ULOG_ERR("Usage: swapoff [-a] [DEVICE]\n\n"
1579 "\tStop swapping on DEVICE\n"
1580 " -a\tStop swapping on all swap devices\n");
1584 if (!strcmp(argv
[1], "-a")) {
1585 FILE *fp
= fopen("/proc/swaps", "r");
1589 ULOG_ERR("failed to open /proc/swaps\n");
1592 if (fgets(line
, sizeof(line
), fp
))
1593 while (fgets(line
, sizeof(line
), fp
)) {
1594 char *end
= strchr(line
, ' ');
1600 err
= swapoff(line
);
1602 ULOG_ERR("failed to swapoff %s (%d)\n", line
, err
);
1609 if (stat(argv
[1], &s
) || (!S_ISBLK(s
.st_mode
) && !S_ISREG(s
.st_mode
))) {
1610 ULOG_ERR("%s is not a block device or file\n", argv
[1]);
1613 err
= swapoff(argv
[1]);
1615 ULOG_ERR("failed to swapoff %s (%d)\n", argv
[1], err
);
1623 int main(int argc
, char **argv
)
1625 char *base
= basename(*argv
);
1629 ulog_open(-1, -1, "block");
1630 ulog_threshold(LOG_NOTICE
);
1632 if (!strcmp(base
, "swapon"))
1633 return main_swapon(argc
, argv
);
1635 if (!strcmp(base
, "swapoff"))
1636 return main_swapoff(argc
, argv
);
1638 if ((argc
> 1) && !strcmp(base
, "block")) {
1639 if (!strcmp(argv
[1], "info"))
1640 return main_info(argc
, argv
);
1642 if (!strcmp(argv
[1], "detect"))
1643 return main_detect(argc
, argv
);
1645 if (!strcmp(argv
[1], "hotplug"))
1646 return main_hotplug(argc
, argv
);
1648 if (!strcmp(argv
[1], "extroot"))
1649 return main_extroot(argc
, argv
);
1651 if (!strcmp(argv
[1], "mount"))
1652 return main_mount(argc
, argv
);
1654 if (!strcmp(argv
[1], "umount"))
1655 return main_umount(argc
, argv
);
1657 if (!strcmp(argv
[1], "remount")) {
1658 int ret
= main_umount(argc
, argv
);
1661 ret
= main_mount(argc
, argv
);
1666 ULOG_ERR("Usage: block <info|mount|umount|detect>\n");