+++ /dev/null
-/*
- * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
- * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License version 2.1
- * as published by the Free Software Foundation
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#define _GNU_SOURCE
-#include <getopt.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <syslog.h>
-#include <libgen.h>
-#include <glob.h>
-
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/swap.h>
-#include <sys/mount.h>
-#include <sys/wait.h>
-
-#include <uci.h>
-#include <uci_blob.h>
-
-#include <libubox/list.h>
-#include <libubox/vlist.h>
-#include <libubox/blobmsg_json.h>
-#include <libubox/avl-cmp.h>
-
-#include "libblkid-tiny/libblkid-tiny.h"
-
-#define ERROR(fmt, ...) do { \
- syslog(LOG_ERR, fmt, ## __VA_ARGS__); \
- fprintf(stderr, "block: "fmt, ## __VA_ARGS__); \
- } while (0)
-
-enum {
- TYPE_MOUNT,
- TYPE_SWAP,
-};
-
-struct mount {
- struct vlist_node node;
- int type;
-
- char *target;
- char *path;
- char *options;
- uint32_t flags;
- char *uuid;
- char *label;
- char *device;
- int extroot;
- int overlay;
- int disabled_fsck;
- unsigned int prio;
-};
-
-static struct vlist_tree mounts;
-static struct blob_buf b;
-static LIST_HEAD(devices);
-static int anon_mount, anon_swap, auto_mount, auto_swap, check_fs;
-static unsigned int delay_root;
-
-enum {
- CFG_ANON_MOUNT,
- CFG_ANON_SWAP,
- CFG_AUTO_MOUNT,
- CFG_AUTO_SWAP,
- CFG_DELAY_ROOT,
- CFG_CHECK_FS,
- __CFG_MAX
-};
-
-static const struct blobmsg_policy config_policy[__CFG_MAX] = {
- [CFG_ANON_SWAP] = { .name = "anon_swap", .type = BLOBMSG_TYPE_INT32 },
- [CFG_ANON_MOUNT] = { .name = "anon_mount", .type = BLOBMSG_TYPE_INT32 },
- [CFG_AUTO_SWAP] = { .name = "auto_swap", .type = BLOBMSG_TYPE_INT32 },
- [CFG_AUTO_MOUNT] = { .name = "auto_mount", .type = BLOBMSG_TYPE_INT32 },
- [CFG_DELAY_ROOT] = { .name = "delay_root", .type = BLOBMSG_TYPE_INT32 },
- [CFG_CHECK_FS] = { .name = "check_fs", .type = BLOBMSG_TYPE_INT32 },
-};
-
-enum {
- MOUNT_UUID,
- MOUNT_LABEL,
- MOUNT_ENABLE,
- MOUNT_TARGET,
- MOUNT_DEVICE,
- MOUNT_OPTIONS,
- __MOUNT_MAX
-};
-
-static const struct uci_blob_param_list config_attr_list = {
- .n_params = __CFG_MAX,
- .params = config_policy,
-};
-
-static const struct blobmsg_policy mount_policy[__MOUNT_MAX] = {
- [MOUNT_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING },
- [MOUNT_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING },
- [MOUNT_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
- [MOUNT_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
- [MOUNT_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_STRING },
- [MOUNT_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
-};
-
-static const struct uci_blob_param_list mount_attr_list = {
- .n_params = __MOUNT_MAX,
- .params = mount_policy,
-};
-
-enum {
- SWAP_ENABLE,
- SWAP_UUID,
- SWAP_LABEL,
- SWAP_DEVICE,
- SWAP_PRIO,
- __SWAP_MAX
-};
-
-static const struct blobmsg_policy swap_policy[__SWAP_MAX] = {
- [SWAP_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
- [SWAP_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING },
- [SWAP_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING },
- [SWAP_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
- [SWAP_PRIO] = { .name = "priority", .type = BLOBMSG_TYPE_INT32 },
-};
-
-static const struct uci_blob_param_list swap_attr_list = {
- .n_params = __SWAP_MAX,
- .params = swap_policy,
-};
-
-struct mount_flag {
- const char *name;
- int32_t flag;
-};
-
-#ifndef MS_DIRSYNC
-# define MS_DIRSYNC (1 << 7)
-#endif
-
-#ifndef MS_RELATIME
-# define MS_RELATIME (1 << 21)
-#endif
-
-#ifndef MS_STRICTATIME
-# define MS_STRICTATIME (1 << 24)
-#endif
-
-static const struct mount_flag mount_flags[] = {
- { "sync", MS_SYNCHRONOUS },
- { "async", ~MS_SYNCHRONOUS },
- { "dirsync", MS_DIRSYNC },
- { "mand", MS_MANDLOCK },
- { "nomand", ~MS_MANDLOCK },
- { "atime", ~MS_NOATIME },
- { "noatime", MS_NOATIME },
- { "dev", ~MS_NODEV },
- { "nodev", MS_NODEV },
- { "diratime", ~MS_NODIRATIME },
- { "nodiratime", MS_NODIRATIME },
- { "exec", ~MS_NOEXEC },
- { "noexec", MS_NOEXEC },
- { "suid", ~MS_NOSUID },
- { "nosuid", MS_NOSUID },
- { "rw", ~MS_RDONLY },
- { "ro", MS_RDONLY },
- { "relatime", MS_RELATIME },
- { "norelatime", ~MS_RELATIME },
- { "strictatime", MS_STRICTATIME },
-};
-
-static char *blobmsg_get_strdup(struct blob_attr *attr)
-{
- if (!attr)
- return NULL;
-
- return strdup(blobmsg_get_string(attr));
-}
-
-static char *blobmsg_get_basename(struct blob_attr *attr)
-{
- if (!attr)
- return NULL;
-
- return strdup(basename(blobmsg_get_string(attr)));
-}
-
-static void parse_mount_options(struct mount *m, char *optstr)
-{
- int i;
- bool is_flag;
- char *p, *opts, *last;
-
- m->flags = 0;
- m->options = NULL;
-
- if (!optstr || !*optstr)
- return;
-
- m->options = opts = calloc(1, strlen(optstr) + 1);
-
- if (!m->options)
- return;
-
- p = last = optstr;
-
- do {
- p = strchr(p, ',');
-
- if (p)
- *p++ = 0;
-
- for (i = 0, is_flag = false; i < ARRAY_SIZE(mount_flags); i++) {
- if (!strcmp(last, mount_flags[i].name)) {
- if (mount_flags[i].flag < 0)
- m->flags &= (uint32_t)mount_flags[i].flag;
- else
- m->flags |= (uint32_t)mount_flags[i].flag;
- is_flag = true;
- break;
- }
- }
-
- if (!is_flag)
- opts += sprintf(opts, "%s%s", (opts > m->options) ? "," : "", last);
-
- last = p;
-
- } while (p);
-
- free(optstr);
-}
-
-static int mount_add(struct uci_section *s)
-{
- struct blob_attr *tb[__MOUNT_MAX] = { 0 };
- struct mount *m;
-
- blob_buf_init(&b, 0);
- uci_to_blob(&b, s, &mount_attr_list);
- blobmsg_parse(mount_policy, __MOUNT_MAX, tb, blob_data(b.head), blob_len(b.head));
-
- if (!tb[MOUNT_LABEL] && !tb[MOUNT_UUID] && !tb[MOUNT_DEVICE])
- return -1;
-
- if (tb[MOUNT_ENABLE] && !blobmsg_get_u32(tb[MOUNT_ENABLE]))
- return -1;
-
- m = malloc(sizeof(struct mount));
- m->type = TYPE_MOUNT;
- m->uuid = blobmsg_get_strdup(tb[MOUNT_UUID]);
- m->label = blobmsg_get_strdup(tb[MOUNT_LABEL]);
- m->target = blobmsg_get_strdup(tb[MOUNT_TARGET]);
- m->device = blobmsg_get_basename(tb[MOUNT_DEVICE]);
-
- parse_mount_options(m, blobmsg_get_strdup(tb[MOUNT_OPTIONS]));
-
- m->overlay = m->extroot = 0;
- if (m->target && !strcmp(m->target, "/"))
- m->extroot = 1;
- if (m->target && !strcmp(m->target, "/overlay"))
- m->extroot = m->overlay = 1;
-
- if (m->uuid)
- vlist_add(&mounts, &m->node, m->uuid);
- else if (m->label)
- vlist_add(&mounts, &m->node, m->label);
- else if (m->device)
- vlist_add(&mounts, &m->node, m->device);
-
- return 0;
-}
-
-static int swap_add(struct uci_section *s)
-{
- struct blob_attr *tb[__SWAP_MAX] = { 0 };
- struct mount *m;
-
- blob_buf_init(&b, 0);
- uci_to_blob(&b, s, &swap_attr_list);
- blobmsg_parse(swap_policy, __SWAP_MAX, tb, blob_data(b.head), blob_len(b.head));
-
- if (!tb[SWAP_UUID] && !tb[SWAP_LABEL] && !tb[SWAP_DEVICE])
- return -1;
-
- m = malloc(sizeof(struct mount));
- memset(m, 0, sizeof(struct mount));
- m->type = TYPE_SWAP;
- m->uuid = blobmsg_get_strdup(tb[SWAP_UUID]);
- m->label = blobmsg_get_strdup(tb[SWAP_LABEL]);
- m->device = blobmsg_get_basename(tb[SWAP_DEVICE]);
- if (tb[SWAP_PRIO])
- m->prio = blobmsg_get_u32(tb[SWAP_PRIO]);
- if (m->prio)
- m->prio = ((m->prio << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
-
- if ((!tb[SWAP_ENABLE]) || blobmsg_get_u32(tb[SWAP_ENABLE])) {
- /* store complete swap path */
- if (tb[SWAP_DEVICE])
- m->target = blobmsg_get_strdup(tb[SWAP_DEVICE]);
-
- if (m->uuid)
- vlist_add(&mounts, &m->node, m->uuid);
- else if (m->label)
- vlist_add(&mounts, &m->node, m->label);
- else if (m->device)
- vlist_add(&mounts, &m->node, m->device);
- }
-
- return 0;
-}
-
-static int global_add(struct uci_section *s)
-{
- struct blob_attr *tb[__CFG_MAX] = { 0 };
-
- blob_buf_init(&b, 0);
- uci_to_blob(&b, s, &config_attr_list);
- blobmsg_parse(config_policy, __CFG_MAX, tb, blob_data(b.head), blob_len(b.head));
-
- if ((tb[CFG_ANON_MOUNT]) && blobmsg_get_u32(tb[CFG_ANON_MOUNT]))
- anon_mount = 1;
- if ((tb[CFG_ANON_SWAP]) && blobmsg_get_u32(tb[CFG_ANON_SWAP]))
- anon_swap = 1;
-
- if ((tb[CFG_AUTO_MOUNT]) && blobmsg_get_u32(tb[CFG_AUTO_MOUNT]))
- auto_mount = 1;
- if ((tb[CFG_AUTO_SWAP]) && blobmsg_get_u32(tb[CFG_AUTO_SWAP]))
- auto_swap = 1;
-
- if (tb[CFG_DELAY_ROOT])
- delay_root = blobmsg_get_u32(tb[CFG_DELAY_ROOT]);
-
- if ((tb[CFG_CHECK_FS]) && blobmsg_get_u32(tb[CFG_CHECK_FS]))
- check_fs = 1;
-
- return 0;
-}
-
-static struct mount* find_swap(const char *uuid, const char *label, const char *device)
-{
- struct mount *m;
-
- vlist_for_each_element(&mounts, m, node) {
- if (m->type != TYPE_SWAP)
- continue;
- if (uuid && m->uuid && !strcmp(m->uuid, uuid))
- return m;
- if (label && m->label && !strcmp(m->label, label))
- return m;
- if (device && m->device && !strcmp(m->device, device))
- return m;
- }
-
- return NULL;
-}
-
-static struct mount* find_block(const char *uuid, const char *label, const char *device,
- const char *target)
-{
- struct mount *m;
-
- vlist_for_each_element(&mounts, m, node) {
- if (m->type != TYPE_MOUNT)
- continue;
- if (m->uuid && uuid && !strcmp(m->uuid, uuid))
- return m;
- if (m->label && label && !strcmp(m->label, label))
- return m;
- if (m->target && target && !strcmp(m->target, target))
- return m;
- if (m->device && device && !strcmp(m->device, device))
- return m;
- }
-
- return NULL;
-}
-
-static void mounts_update(struct vlist_tree *tree, struct vlist_node *node_new,
- struct vlist_node *node_old)
-{
-}
-
-static int config_load(char *cfg)
-{
- struct uci_context *ctx;
- struct uci_package *pkg;
- struct uci_element *e;
-
- vlist_init(&mounts, avl_strcmp, mounts_update);
-
- ctx = uci_alloc_context();
- if (cfg) {
- char path[32];
- snprintf(path, 32, "%s/etc/config", cfg);
- uci_set_confdir(ctx, path);
- }
-
- if (uci_load(ctx, "fstab", &pkg))
- {
- char *err;
- uci_get_errorstr(ctx, &err, "fstab");
- ERROR("extroot: failed to load %s/etc/config/%s\n",
- cfg ? cfg : "", err);
- free(err);
- return -1;
- }
-
- vlist_update(&mounts);
- uci_foreach_element(&pkg->sections, e) {
- struct uci_section *s = uci_to_section(e);
-
- if (!strcmp(s->type, "mount"))
- mount_add(s);
- if (!strcmp(s->type, "swap"))
- swap_add(s);
- if (!strcmp(s->type, "global"))
- global_add(s);
- }
- vlist_flush(&mounts);
-
- return 0;
-}
-
-static struct blkid_struct_probe* _probe_path(char *path)
-{
- struct blkid_struct_probe *pr;
-
- pr = malloc(sizeof(*pr));
-
- if (!pr)
- return NULL;
-
- memset(pr, 0, sizeof(*pr));
- probe_block(path, pr);
-
- if (pr->err || !pr->id) {
- free(pr);
- return NULL;
- }
-
- return pr;
-}
-
-static int _cache_load(const char *path)
-{
- int gl_flags = GLOB_NOESCAPE | GLOB_MARK;
- int j;
- glob_t gl;
-
- if (glob(path, gl_flags, NULL, &gl) < 0)
- return -1;
-
- for (j = 0; j < gl.gl_pathc; j++) {
- struct blkid_struct_probe *pr = _probe_path(gl.gl_pathv[j]);
- if (pr)
- list_add_tail(&pr->list, &devices);
- }
-
- globfree(&gl);
-
- return 0;
-}
-
-static void cache_load(int mtd)
-{
- if (mtd)
- _cache_load("/dev/mtdblock*");
- _cache_load("/dev/mmcblk*");
- _cache_load("/dev/sd*");
- _cache_load("/dev/hd*");
- _cache_load("/dev/md*");
- _cache_load("/dev/mapper/*");
-}
-
-static int print_block_info(struct blkid_struct_probe *pr)
-{
- printf("%s:", pr->dev);
- if (pr->uuid[0])
- printf(" UUID=\"%s\"", pr->uuid);
-
- if (pr->label[0])
- printf(" LABEL=\"%s\"", pr->label);
-
- if (pr->name[0])
- printf(" NAME=\"%s\"", pr->name);
-
- if (pr->version[0])
- printf(" VERSION=\"%s\"", pr->version);
-
- printf(" TYPE=\"%s\"\n", pr->id->name);
-
- return 0;
-}
-
-static int print_block_uci(struct blkid_struct_probe *pr)
-{
- if (!strcmp(pr->id->name, "swap")) {
- printf("config 'swap'\n");
- } else {
- printf("config 'mount'\n");
- printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev));
- }
- if (pr->uuid[0])
- printf("\toption\tuuid\t'%s'\n", pr->uuid);
- else
- printf("\toption\tdevice\t'%s'\n", pr->dev);
- printf("\toption\tenabled\t'0'\n\n");
-
- return 0;
-}
-
-static struct blkid_struct_probe* find_block_info(char *uuid, char *label, char *path)
-{
- struct blkid_struct_probe *pr = NULL;
-
- if (uuid)
- list_for_each_entry(pr, &devices, list)
- if (!strcmp(pr->uuid, uuid))
- return pr;
-
- if (label)
- list_for_each_entry(pr, &devices, list)
- if (!strcmp(pr->label, label))
- return pr;
-
- if (path)
- list_for_each_entry(pr, &devices, list)
- if (!strcmp(basename(pr->dev), basename(path)))
- return pr;
-
- return NULL;
-}
-
-static char* find_mount_point(char *block)
-{
- FILE *fp = fopen("/proc/mounts", "r");
- static char line[256];
- int len = strlen(block);
- char *point = NULL;
-
- if(!fp)
- return NULL;
-
- while (fgets(line, sizeof(line), fp)) {
- if (!strncmp(line, block, len)) {
- char *p = &line[len + 1];
- char *t = strstr(p, " ");
-
- if (!t) {
- fclose(fp);
- return NULL;
- }
- *t = '\0';
- point = p;
- break;
- }
- }
-
- fclose(fp);
-
- return point;
-}
-
-static void mkdir_p(char *dir)
-{
- char *l = strrchr(dir, '/');
-
- if (l) {
- *l = '\0';
- mkdir_p(dir);
- *l = '/';
- mkdir(dir, 0755);
- }
-}
-
-static void check_filesystem(struct blkid_struct_probe *pr)
-{
- pid_t pid;
- struct stat statbuf;
- char *e2fsck = "/usr/sbin/e2fsck";
-
- if (strncmp(pr->id->name, "ext", 3)) {
- ERROR("check_filesystem: %s is not supported\n", pr->id->name);
- return;
- }
-
- if (stat(e2fsck, &statbuf) < 0) {
- ERROR("check_filesystem: %s not found\n", e2fsck);
- return;
- }
-
- pid = fork();
- if (!pid) {
- execl(e2fsck, e2fsck, "-p", pr->dev, NULL);
- exit(-1);
- } else if (pid > 0) {
- int status;
-
- waitpid(pid, &status, 0);
- if (WEXITSTATUS(status))
- ERROR("check_filesystem: %s returned %d\n", e2fsck, WEXITSTATUS(status));
- }
-}
-
-static void handle_swapfiles(bool on)
-{
- struct stat s;
- struct mount *m;
- struct blkid_struct_probe *pr;
-
- vlist_for_each_element(&mounts, m, node)
- {
- if (m->type != TYPE_SWAP || !m->target)
- continue;
-
- if (stat(m->target, &s) || !S_ISREG(s.st_mode))
- continue;
-
- pr = _probe_path(m->target);
-
- if (!pr)
- continue;
-
- if (!strcmp(pr->id->name, "swap")) {
- if (on)
- swapon(pr->dev, m->prio);
- else
- swapoff(pr->dev);
- }
-
- free(pr);
- }
-}
-
-static int mount_device(struct blkid_struct_probe *pr, int hotplug)
-{
- struct mount *m;
- char *device;
-
- if (!pr)
- return -1;
-
- device = basename(pr->dev);
-
- if (!strcmp(pr->id->name, "swap")) {
- if (hotplug && !auto_swap)
- return -1;
- m = find_swap(pr->uuid, pr->label, device);
- if (m || anon_swap)
- swapon(pr->dev, (m) ? (m->prio) : (0));
-
- return 0;
- }
-
- if (hotplug && !auto_mount)
- return -1;
-
- if (find_mount_point(pr->dev)) {
- ERROR("%s is already mounted\n", pr->dev);
- return -1;
- }
-
- m = find_block(pr->uuid, pr->label, device, NULL);
- if (m && m->extroot)
- return -1;
-
- if (m) {
- char *target = m->target;
- char _target[32];
- int err = 0;
-
- if (!target) {
- snprintf(_target, sizeof(_target), "/mnt/%s", device);
- target = _target;
- }
- mkdir_p(target);
-
- if (check_fs)
- check_filesystem(pr);
-
- err = mount(pr->dev, target, pr->id->name, m->flags,
- (m->options) ? (m->options) : (""));
- if (err)
- ERROR("mounting %s (%s) as %s failed (%d) - %s\n",
- pr->dev, pr->id->name, target, err, strerror(err));
- else
- handle_swapfiles(true);
- return err;
- }
-
- if (anon_mount) {
- char target[] = "/mnt/mmcblk123";
- int err = 0;
-
- snprintf(target, sizeof(target), "/mnt/%s", device);
- mkdir_p(target);
-
- if (check_fs)
- check_filesystem(pr);
-
- err = mount(pr->dev, target, pr->id->name, 0, "");
- if (err)
- ERROR("mounting %s (%s) as %s failed (%d) - %s\n",
- pr->dev, pr->id->name, target, err, strerror(err));
- else
- handle_swapfiles(true);
- return err;
- }
-
- return 0;
-}
-
-static int umount_device(struct blkid_struct_probe *pr)
-{
- struct mount *m;
- char *device = basename(pr->dev);
- char *mp;
- int err;
-
- if (!pr)
- return -1;
-
- if (!strcmp(pr->id->name, "swap"))
- return -1;
-
- mp = find_mount_point(pr->dev);
- if (!mp)
- return -1;
-
- m = find_block(pr->uuid, pr->label, device, NULL);
- if (m && m->extroot)
- return -1;
-
- err = umount2(mp, MNT_DETACH);
- if (err)
- ERROR("unmounting %s (%s) failed (%d) - %s\n",
- pr->dev, mp, err, strerror(err));
- else
- ERROR("unmounted %s (%s)\n",
- pr->dev, mp);
-
- return err;
-}
-
-static int main_hotplug(int argc, char **argv)
-{
- char path[32];
- char *action, *device, *mount_point;
-
- action = getenv("ACTION");
- device = getenv("DEVNAME");
-
- if (!action || !device)
- return -1;
- snprintf(path, sizeof(path), "/dev/%s", device);
-
- if (!strcmp(action, "remove")) {
- int err = 0;
- mount_point = find_mount_point(path);
- if (mount_point)
- err = umount2(mount_point, MNT_DETACH);
-
- if (err)
- ERROR("umount of %s failed (%d) - %s\n",
- mount_point, err, strerror(err));
-
- return 0;
- } else if (strcmp(action, "add")) {
- ERROR("Unkown action %s\n", action);
-
- return -1;
- }
-
- if (config_load(NULL))
- return -1;
- cache_load(0);
-
- return mount_device(find_block_info(NULL, NULL, path), 1);
-}
-
-static int find_block_mtd(char *name, char *part, int plen)
-{
- FILE *fp = fopen("/proc/mtd", "r");
- static char line[256];
- char *index = NULL;
-
- if(!fp)
- return -1;
-
- while (!index && fgets(line, sizeof(line), fp)) {
- if (strstr(line, name)) {
- char *eol = strstr(line, ":");
-
- if (!eol)
- continue;
-
- *eol = '\0';
- index = &line[3];
- }
- }
-
- fclose(fp);
-
- if (!index)
- return -1;
-
- snprintf(part, plen, "/dev/mtdblock%s", index);
-
- return 0;
-}
-
-static int check_extroot(char *path)
-{
- struct blkid_struct_probe *pr = NULL;
- char fs[32];
-
- if (find_block_mtd("rootfs", fs, sizeof(fs)))
- return -1;
-
- list_for_each_entry(pr, &devices, list) {
- if (!strcmp(pr->dev, fs)) {
- struct stat s;
- FILE *fp = NULL;
- char tag[64];
- char uuid[64] = { 0 };
-
- snprintf(tag, sizeof(tag), "%s/etc/.extroot-uuid", path);
- if (stat(tag, &s)) {
- fp = fopen(tag, "w+");
- if (!fp) {
- ERROR("extroot: failed to write uuid tag file\n");
- /* return 0 to continue boot regardless of error */
- return 0;
- }
- fputs(pr->uuid, fp);
- fclose(fp);
- return 0;
- }
-
- fp = fopen(tag, "r");
- if (!fp) {
- ERROR("extroot: failed to open uuid tag file\n");
- return -1;
- }
-
- fgets(uuid, sizeof(uuid), fp);
- fclose(fp);
- if (!strcmp(uuid, pr->uuid))
- return 0;
- ERROR("extroot: uuid tag does not match rom uuid\n");
- }
- }
- return -1;
-}
-
-static int mount_extroot(char *cfg)
-{
- char overlay[] = "/tmp/extroot/overlay";
- char mnt[] = "/tmp/extroot/mnt";
- char *path = mnt;
- struct blkid_struct_probe *pr;
- struct mount *m;
- int err = -1;
-
- if (config_load(cfg))
- return -2;
-
- m = find_block(NULL, NULL, NULL, "/");
- if (!m)
- m = find_block(NULL, NULL, NULL, "/overlay");
-
- if (!m || !m->extroot)
- {
- ERROR("extroot: no root or overlay mount defined\n");
- return -1;
- }
-
- pr = find_block_info(m->uuid, m->label, m->device);
-
- if (!pr && delay_root){
- ERROR("extroot: is not ready yet, retrying in %u seconds\n", delay_root);
- sleep(delay_root);
- mkblkdev();
- cache_load(0);
- pr = find_block_info(m->uuid, m->label, m->device);
- }
- if (pr) {
- if (strncmp(pr->id->name, "ext", 3)) {
- ERROR("extroot: %s is not supported, try ext4\n", pr->id->name);
- return -1;
- }
- if (m->overlay)
- path = overlay;
- mkdir_p(path);
-
- if (check_fs)
- check_filesystem(pr);
-
- err = mount(pr->dev, path, pr->id->name, 0, (m->options) ? (m->options) : (""));
-
- if (err) {
- ERROR("mounting %s (%s) as %s failed (%d) - %s\n",
- pr->dev, pr->id->name, path, err, strerror(err));
- } else if (m->overlay) {
- err = check_extroot(path);
- if (err)
- umount(path);
- }
- } else {
- ERROR("extroot: cannot find block device\n");
- }
-
- return err;
-}
-
-static int main_extroot(int argc, char **argv)
-{
- struct blkid_struct_probe *pr;
- char fs[32] = { 0 };
- char fs_data[32] = { 0 };
- int err = -1;
-
- if (!getenv("PREINIT"))
- return -1;
-
- if (argc != 2) {
- fprintf(stderr, "Usage: block extroot mountpoint\n");
- return -1;
- }
-
- mkblkdev();
- cache_load(1);
-
- find_block_mtd("rootfs", fs, sizeof(fs));
- if (!fs[0]) {
- ERROR("extroot: unable to locate rootfs mtdblock\n");
- return -2;
- }
-
- pr = find_block_info(NULL, NULL, fs);
- if (!pr) {
- ERROR("extroot: unable to retrieve rootfs information\n");
- return -3;
- }
-
- find_block_mtd("rootfs_data", fs_data, sizeof(fs_data));
- if (fs_data[0]) {
- pr = find_block_info(NULL, NULL, fs_data);
- if (pr && !strcmp(pr->id->name, "jffs2")) {
- char cfg[] = "/tmp/jffs_cfg";
-
- mkdir_p(cfg);
- if (!mount(fs_data, cfg, "jffs2", MS_NOATIME, NULL)) {
- err = mount_extroot(cfg);
- umount2(cfg, MNT_DETACH);
- }
- if (err < 0)
- rmdir("/tmp/overlay");
- rmdir(cfg);
- return err;
- }
- }
-
- return mount_extroot(NULL);
-}
-
-static int main_mount(int argc, char **argv)
-{
- struct blkid_struct_probe *pr;
-
- if (config_load(NULL))
- return -1;
-
- cache_load(1);
- list_for_each_entry(pr, &devices, list)
- mount_device(pr, 0);
-
- handle_swapfiles(true);
-
- return 0;
-}
-
-static int main_umount(int argc, char **argv)
-{
- struct blkid_struct_probe *pr;
-
- if (config_load(NULL))
- return -1;
-
- handle_swapfiles(false);
-
- cache_load(0);
- list_for_each_entry(pr, &devices, list)
- umount_device(pr);
-
- return 0;
-}
-
-static int main_detect(int argc, char **argv)
-{
- struct blkid_struct_probe *pr;
-
- cache_load(0);
- printf("config 'global'\n");
- printf("\toption\tanon_swap\t'0'\n");
- printf("\toption\tanon_mount\t'0'\n");
- printf("\toption\tauto_swap\t'1'\n");
- printf("\toption\tauto_mount\t'1'\n");
- printf("\toption\tdelay_root\t'5'\n");
- printf("\toption\tcheck_fs\t'0'\n\n");
- list_for_each_entry(pr, &devices, list)
- print_block_uci(pr);
-
- return 0;
-}
-
-static int main_info(int argc, char **argv)
-{
- int i;
- struct blkid_struct_probe *pr;
-
- cache_load(1);
- if (argc == 2) {
- list_for_each_entry(pr, &devices, list)
- print_block_info(pr);
-
- return 0;
- };
-
- for (i = 2; i < argc; i++) {
- struct stat s;
-
- if (stat(argv[i], &s)) {
- ERROR("failed to stat %s\n", argv[i]);
- continue;
- }
- if (!S_ISBLK(s.st_mode)) {
- ERROR("%s is not a block device\n", argv[i]);
- continue;
- }
- pr = find_block_info(NULL, NULL, argv[i]);
- if (pr)
- print_block_info(pr);
- }
-
- return 0;
-}
-
-static int swapon_usage(void)
-{
- fprintf(stderr, "Usage: swapon [-s] [-a] [[-p pri] DEVICE]\n\n"
- "\tStart swapping on [DEVICE]\n"
- " -a\tStart swapping on all swap devices\n"
- " -p pri\tSet priority of swap device\n"
- " -s\tShow summary\n");
- return -1;
-}
-
-static int main_swapon(int argc, char **argv)
-{
- int ch;
- FILE *fp;
- char *lineptr;
- size_t s;
- struct blkid_struct_probe *pr;
- int flags = 0;
- int pri;
- struct stat st;
- int err;
-
- while ((ch = getopt(argc, argv, "ap:s")) != -1) {
- switch(ch) {
- case 's':
- fp = fopen("/proc/swaps", "r");
- lineptr = NULL;
-
- if (!fp) {
- ERROR("failed to open /proc/swaps\n");
- return -1;
- }
- while (getline(&lineptr, &s, fp) > 0)
- printf(lineptr);
- if (lineptr)
- free(lineptr);
- fclose(fp);
- return 0;
- case 'a':
- cache_load(0);
- list_for_each_entry(pr, &devices, list) {
- if (strcmp(pr->id->name, "swap"))
- continue;
- if (swapon(pr->dev, 0))
- ERROR("failed to swapon %s\n", pr->dev);
- }
- return 0;
- case 'p':
- pri = atoi(optarg);
- if (pri >= 0)
- flags = ((pri << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
- break;
- default:
- return swapon_usage();
- }
-
- }
-
- if (optind != (argc - 1))
- return swapon_usage();
-
- if (stat(argv[optind], &st) || (!S_ISBLK(st.st_mode) && !S_ISREG(st.st_mode))) {
- ERROR("%s is not a block device or file\n", argv[optind]);
- return -1;
- }
- err = swapon(argv[optind], flags);
- if (err) {
- ERROR("failed to swapon %s (%d)\n", argv[optind], err);
- return err;
- }
-
- return 0;
-}
-
-static int main_swapoff(int argc, char **argv)
-{
- if (argc != 2) {
- ERROR("Usage: swapoff [-a] [DEVICE]\n\n"
- "\tStop swapping on DEVICE\n"
- " -a\tStop swapping on all swap devices\n");
- return -1;
- }
-
- if (!strcmp(argv[1], "-a")) {
- FILE *fp = fopen("/proc/swaps", "r");
- char line[256];
-
- if (!fp) {
- ERROR("failed to open /proc/swaps\n");
- return -1;
- }
- fgets(line, sizeof(line), fp);
- while (fgets(line, sizeof(line), fp)) {
- char *end = strchr(line, ' ');
- int err;
-
- if (!end)
- continue;
- *end = '\0';
- err = swapoff(line);
- if (err)
- ERROR("failed to swapoff %s (%d)\n", line, err);
- }
- fclose(fp);
- } else {
- struct stat s;
- int err;
-
- if (stat(argv[1], &s) || (!S_ISBLK(s.st_mode) && !S_ISREG(s.st_mode))) {
- ERROR("%s is not a block device or file\n", argv[1]);
- return -1;
- }
- err = swapoff(argv[1]);
- if (err) {
- ERROR("fsiled to swapoff %s (%d)\n", argv[1], err);
- return err;
- }
- }
-
- return 0;
-}
-
-int main(int argc, char **argv)
-{
- char *base = basename(*argv);
-
- umask(0);
-
- if (!strcmp(base, "swapon"))
- return main_swapon(argc, argv);
-
- if (!strcmp(base, "swapoff"))
- return main_swapoff(argc, argv);
-
- if ((argc > 1) && !strcmp(base, "block")) {
- if (!strcmp(argv[1], "info"))
- return main_info(argc, argv);
-
- if (!strcmp(argv[1], "detect"))
- return main_detect(argc, argv);
-
- if (!strcmp(argv[1], "hotplug"))
- return main_hotplug(argc, argv);
-
- if (!strcmp(argv[1], "extroot"))
- return main_extroot(argc, argv);
-
- if (!strcmp(argv[1], "mount"))
- return main_mount(argc, argv);
-
- if (!strcmp(argv[1], "umount"))
- return main_umount(argc, argv);
- }
-
- fprintf(stderr, "Usage: block <info|mount|umount|detect>\n");
-
- return -1;
-}
projects / project / ubox.git / blobdiff