block: remove mount target file if it's a link
[project/fstools.git] / block.c
diff --git a/block.c b/block.c
index 24becef72bac9ced513cb85ad954b3095b0a6aca..9e530f1a93b8e729cf9aeadfd508bd261928070a 100644 (file)
--- a/block.c
+++ b/block.c
@@ -31,6 +31,7 @@
 #include <sys/swap.h>
 #include <sys/mount.h>
 #include <sys/wait.h>
+#include <sys/sysmacros.h>
 
 #include <linux/fs.h>
 
 #include <libubox/vlist.h>
 #include <libubox/blobmsg_json.h>
 #include <libubox/avl-cmp.h>
+#include <libubus.h>
 
 #include "probe.h"
 
+#define AUTOFS_MOUNT_PATH       "/tmp/run/blockd/"
+
 #ifdef UBIFS_EXTROOT
 #include "libubi/libubi.h"
 #endif
@@ -54,6 +58,12 @@ enum {
        TYPE_SWAP,
 };
 
+enum {
+       TYPE_DEV,
+       TYPE_HOTPLUG,
+       TYPE_AUTOFS,
+};
+
 struct mount {
        struct vlist_node node;
        int type;
@@ -66,14 +76,26 @@ struct mount {
        char *label;
        char *device;
        int extroot;
+       int autofs;
        int overlay;
        int disabled_fsck;
        unsigned int prio;
 };
 
-static struct vlist_tree mounts;
+struct device {
+       struct vlist_node node;
+
+       struct probe_info *pr;
+       struct mount *m;
+};
+
+static void vlist_nop_update(struct vlist_tree *tree, struct vlist_node *node_new,
+                         struct vlist_node *node_old);
+static int devices_cmp(const void *k1, const void *k2, void *ptr);
+
 static struct blob_buf b;
-static LIST_HEAD(devices);
+static VLIST_TREE(mounts, avl_strcmp, vlist_nop_update, false, false);
+static VLIST_TREE(devices, devices_cmp, vlist_nop_update, false, false);
 static int anon_mount, anon_swap, auto_mount, auto_swap, check_fs;
 static unsigned int delay_root;
 
@@ -103,6 +125,7 @@ enum {
        MOUNT_TARGET,
        MOUNT_DEVICE,
        MOUNT_OPTIONS,
+       MOUNT_AUTOFS,
        __MOUNT_MAX
 };
 
@@ -118,6 +141,7 @@ static const struct blobmsg_policy mount_policy[__MOUNT_MAX] = {
        [MOUNT_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
        [MOUNT_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_STRING },
        [MOUNT_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
+       [MOUNT_AUTOFS] = { .name = "autofs", .type = BLOBMSG_TYPE_INT32 },
 };
 
 static const struct uci_blob_param_list mount_attr_list = {
@@ -246,7 +270,7 @@ static int mount_add(struct uci_section *s)
        struct blob_attr *tb[__MOUNT_MAX] = { 0 };
        struct mount *m;
 
-        blob_buf_init(&b, 0);
+       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));
 
@@ -262,7 +286,10 @@ static int mount_add(struct uci_section *s)
        m->label = blobmsg_get_strdup(tb[MOUNT_LABEL]);
        m->target = blobmsg_get_strdup(tb[MOUNT_TARGET]);
        m->device = blobmsg_get_basename(tb[MOUNT_DEVICE]);
-
+       if (tb[MOUNT_AUTOFS])
+               m->autofs = blobmsg_get_u32(tb[MOUNT_AUTOFS]);
+       else
+               m->autofs = 0;
        parse_mount_options(m, blobmsg_get_strdup(tb[MOUNT_OPTIONS]));
 
        m->overlay = m->extroot = 0;
@@ -393,9 +420,10 @@ static struct mount* find_block(const char *uuid, const char *label, const char
        return NULL;
 }
 
-static void mounts_update(struct vlist_tree *tree, struct vlist_node *node_new,
+static void vlist_nop_update(struct vlist_tree *tree, struct vlist_node *node_new,
                          struct vlist_node *node_old)
 {
+       // NOTE: free on delete skipped
 }
 
 static struct uci_package * config_try_load(struct uci_context *ctx, char *path)
@@ -426,8 +454,6 @@ static int config_load(char *cfg)
        struct uci_element *e;
        char path[64];
 
-       vlist_init(&mounts, avl_strcmp, mounts_update);
-
        if (cfg) {
                snprintf(path, sizeof(path), "%s/upper/etc/config/fstab", cfg);
                pkg = config_try_load(ctx, path);
@@ -466,15 +492,15 @@ static int config_load(char *cfg)
 
 static struct probe_info* _probe_path(char *path)
 {
-       struct probe_info *pr;
+       struct device *dev;
        char tmppath[64];
 
        /* skip ubi device if ubiblock device is present */
        if (path[5] == 'u' && path[6] == 'b' && path[7] == 'i' &&
            path[8] >= '0' && path[8] <= '9' ) {
                snprintf(tmppath, sizeof(tmppath), "/dev/ubiblock%s", path + 8);
-               list_for_each_entry(pr, &devices, list)
-                       if (!strcasecmp(pr->dev, tmppath))
+               vlist_for_each_element(&devices, dev, node)
+                       if (!strcasecmp(dev->pr->dev, tmppath))
                                return NULL;
        }
 
@@ -486,14 +512,20 @@ static int _cache_load(const char *path)
        int gl_flags = GLOB_NOESCAPE | GLOB_MARK;
        int j;
        glob_t gl;
+       struct device *dev;
 
        if (glob(path, gl_flags, NULL, &gl) < 0)
                return -1;
 
        for (j = 0; j < gl.gl_pathc; j++) {
                struct probe_info *pr = _probe_path(gl.gl_pathv[j]);
-               if (pr)
-                       list_add_tail(&pr->list, &devices);
+               if (pr) {
+                       dev = malloc(sizeof(struct device));
+                       dev->pr = pr;
+                       dev->m = find_block(pr->uuid, pr->label,
+                                       basename(pr->dev), NULL);
+                       vlist_add(&devices, &dev->node, dev);
+               }
        }
 
        globfree(&gl);
@@ -501,8 +533,30 @@ static int _cache_load(const char *path)
        return 0;
 }
 
+static int devices_cmp(const void *k1, const void *k2, void *ptr)
+{
+       struct device *dev1 = (struct device *)k1;
+       struct device *dev2 = (struct device *)k2;
+
+       if (dev1->m) {
+               if (!dev2->m)
+                       return -1;
+               if (dev1->m->type == TYPE_MOUNT && dev2->m->type == TYPE_MOUNT &&
+                               dev1->m->target && dev2->m->target) {
+                       int len1 = strlen(dev1->m->target);
+                       int len2 = strlen(dev2->m->target);
+                       if (len1 != len2)
+                               return len1 - len2;
+               }
+       } else if (dev2->m) {
+               return 1;
+       }
+       return strcmp(dev1->pr->dev, dev2->pr->dev);
+}
+
 static void cache_load(int mtd)
 {
+       vlist_update(&devices);
        if (mtd) {
                _cache_load("/dev/mtdblock*");
                _cache_load("/dev/ubiblock*");
@@ -513,46 +567,32 @@ static void cache_load(int mtd)
        _cache_load("/dev/sd*");
        _cache_load("/dev/hd*");
        _cache_load("/dev/md*");
+       _cache_load("/dev/nvme*");
        _cache_load("/dev/vd*");
+       _cache_load("/dev/xvd*");
        _cache_load("/dev/mapper/*");
+       vlist_flush(&devices);
 }
 
 
-static int print_block_uci(struct probe_info *pr)
+static struct device* find_block_device(char *uuid, char *label, char *path)
 {
-       if (!strcmp(pr->type, "swap")) {
-               printf("config 'swap'\n");
-       } else {
-               printf("config 'mount'\n");
-               printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev));
-       }
-       if (pr->uuid)
-               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 probe_info* find_block_info(char *uuid, char *label, char *path)
-{
-       struct probe_info *pr = NULL;
+       struct device *dev;
 
        if (uuid)
-               list_for_each_entry(pr, &devices, list)
-                       if (pr->uuid && !strcasecmp(pr->uuid, uuid))
-                               return pr;
+               vlist_for_each_element(&devices, dev, node)
+                       if (dev->pr->uuid && !strcasecmp(dev->pr->uuid, uuid))
+                               return dev;
 
        if (label)
-               list_for_each_entry(pr, &devices, list)
-                       if (pr->label && !strcmp(pr->label, label))
-                               return pr;
+               vlist_for_each_element(&devices, dev, node)
+                       if (dev->pr->label && !strcmp(dev->pr->label, label))
+                               return dev;
 
        if (path)
-               list_for_each_entry(pr, &devices, list)
-                       if (pr->dev && !strcmp(basename(pr->dev), basename(path)))
-                               return pr;
+               vlist_for_each_element(&devices, dev, node)
+                       if (dev->pr->dev && !strcmp(basename(dev->pr->dev), basename(path)))
+                               return dev;
 
        return NULL;
 }
@@ -561,7 +601,6 @@ static char* find_mount_point(char *block)
 {
        FILE *fp = fopen("/proc/self/mountinfo", "r");
        static char line[256];
-       int len = strlen(block);
        char *point = NULL, *pos, *tmp, *cpoint, *devname;
        struct stat s;
        int rstat;
@@ -625,7 +664,7 @@ static char* find_mount_point(char *block)
 
                *pos = '\0';
                devname = tmp;
-               if (!strncmp(block, devname, len)) {
+               if (!strcmp(block, devname)) {
                        point = strdup(cpoint);
                        break;
                }
@@ -648,6 +687,30 @@ static char* find_mount_point(char *block)
        return point;
 }
 
+static int print_block_uci(struct probe_info *pr)
+{
+       if (!strcmp(pr->type, "swap")) {
+               printf("config 'swap'\n");
+       } else {
+               char *mp = find_mount_point(pr->dev);
+
+               printf("config 'mount'\n");
+               if (mp) {
+                       printf("\toption\ttarget\t'%s'\n", mp);
+                       free(mp);
+               } else {
+                       printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev));
+               }
+       }
+       if (pr->uuid)
+               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 int print_block_info(struct probe_info *pr)
 {
        static char *mp;
@@ -690,7 +753,10 @@ static void check_filesystem(struct probe_info *pr)
        pid_t pid;
        struct stat statbuf;
        const char *e2fsck = "/usr/sbin/e2fsck";
-       const char *dosfsck = "/usr/sbin/dosfsck";
+       const char *f2fsck = "/usr/sbin/fsck.f2fs";
+       const char *fatfsck = "/usr/sbin/fsck.fat";
+       const char *btrfsck = "/usr/bin/btrfsck";
+       const char *ntfsck = "/usr/bin/ntfsfix";
        const char *ckfs;
 
        /* UBIFS does not need stuff like fsck */
@@ -698,9 +764,15 @@ static void check_filesystem(struct probe_info *pr)
                return;
 
        if (!strncmp(pr->type, "vfat", 4)) {
-               ckfs = dosfsck;
+               ckfs = fatfsck;
+       } else if (!strncmp(pr->type, "f2fs", 4)) {
+               ckfs = f2fsck;
        } else if (!strncmp(pr->type, "ext", 3)) {
                ckfs = e2fsck;
+       } else if (!strncmp(pr->type, "btrfs", 5)) {
+               ckfs = btrfsck;
+       } else if (!strncmp(pr->type, "ntfs", 4)) {
+               ckfs = ntfsck;
        } else {
                ULOG_ERR("check_filesystem: %s is not supported\n", pr->type);
                return;
@@ -713,14 +785,27 @@ static void check_filesystem(struct probe_info *pr)
 
        pid = fork();
        if (!pid) {
-               execl(ckfs, ckfs, "-p", pr->dev, NULL);
-               exit(-1);
+               if(!strncmp(pr->type, "f2fs", 4)) {
+                       execl(ckfs, ckfs, "-f", pr->dev, NULL);
+                       exit(EXIT_FAILURE);
+               } else if(!strncmp(pr->type, "btrfs", 5)) {
+                       execl(ckfs, ckfs, "--repair", pr->dev, NULL);
+                       exit(EXIT_FAILURE);
+               } else if(!strncmp(pr->type, "ntfs", 4)) {
+                       execl(ckfs, ckfs, "-b", pr->dev, NULL);
+                       exit(EXIT_FAILURE);
+               } else {
+                       execl(ckfs, ckfs, "-p", pr->dev, NULL);
+                       exit(EXIT_FAILURE);
+               }
        } else if (pid > 0) {
                int status;
 
                waitpid(pid, &status, 0);
-               if (WEXITSTATUS(status))
+               if (WIFEXITED(status) && WEXITSTATUS(status))
                        ULOG_ERR("check_filesystem: %s returned %d\n", ckfs, WEXITSTATUS(status));
+               if (WIFSIGNALED(status))
+                       ULOG_ERR("check_filesystem: %s terminated by %s\n", ckfs, strsignal(WTERMSIG(status)));
        }
 }
 
@@ -840,6 +925,35 @@ static int exec_mount(const char *source, const char *target,
        return err;
 }
 
+static int hotplug_call_mount(const char *action, const char *device)
+{
+       pid_t pid;
+       int err = 0;
+
+       pid = fork();
+       if (!pid) {
+               char * const argv[] = { "hotplug-call", "mount", NULL };
+
+               setenv("ACTION", action, 1);
+               setenv("DEVICE", device, 1);
+
+               execv("/sbin/hotplug-call", argv);
+               exit(-1);
+       } else if (pid > 0) {
+               int status;
+
+               pid = waitpid(pid, &status, 0);
+               if (pid <= 0 || !WIFEXITED(status) || WEXITSTATUS(status)) {
+                       err = -ENOEXEC;
+                       ULOG_ERR("hotplug-call call failed\n");
+               }
+       } else {
+               err = -errno;
+       }
+
+       return err;
+}
+
 static int handle_mount(const char *source, const char *target,
                         const char *fstype, struct mount *m)
 {
@@ -891,19 +1005,88 @@ static int handle_mount(const char *source, const char *target,
        return err;
 }
 
-static int mount_device(struct probe_info *pr, int hotplug)
+static int blockd_notify(char *device, struct mount *m, struct probe_info *pr)
+{
+       struct ubus_context *ctx = ubus_connect(NULL);
+       uint32_t id;
+       int err;
+
+       if (!ctx)
+               return -ENXIO;
+
+       if (!ubus_lookup_id(ctx, "block", &id)) {
+               struct blob_buf buf = { 0 };
+               char *d = strrchr(device, '/');
+
+               if (d)
+                       d++;
+               else
+                       d = device;
+
+               blob_buf_init(&buf, 0);
+
+               if (m) {
+
+                       blobmsg_add_string(&buf, "device", d);
+                       if (m->uuid)
+                               blobmsg_add_string(&buf, "uuid", m->uuid);
+                       if (m->label)
+                               blobmsg_add_string(&buf, "label", m->label);
+                       if (m->target)
+                               blobmsg_add_string(&buf, "target", m->target);
+                       if (m->options)
+                               blobmsg_add_string(&buf, "options", m->options);
+                       if (m->autofs)
+                               blobmsg_add_u32(&buf, "autofs", m->autofs);
+                       if (pr->type)
+                               blobmsg_add_string(&buf, "type", pr->type);
+                       if (pr->version)
+                               blobmsg_add_string(&buf, "version", pr->version);
+               } else if (pr) {
+                       blobmsg_add_string(&buf, "device", d);
+                       if (pr->uuid)
+                               blobmsg_add_string(&buf, "uuid", pr->uuid);
+                       if (pr->label)
+                               blobmsg_add_string(&buf, "label", pr->label);
+                       if (pr->type)
+                               blobmsg_add_string(&buf, "type", pr->type);
+                       if (pr->version)
+                               blobmsg_add_string(&buf, "version", pr->version);
+                       blobmsg_add_u32(&buf, "anon", 1);
+               } else {
+                       blobmsg_add_string(&buf, "device", d);
+                       blobmsg_add_u32(&buf, "remove", 1);
+               }
+
+               err = ubus_invoke(ctx, id, "hotplug", buf.head, NULL, NULL, 3000);
+       } else {
+               err = -ENOENT;
+       }
+
+       ubus_free(ctx);
+
+       return err;
+}
+
+static int mount_device(struct device *dev, int type)
 {
        struct mount *m;
+       struct probe_info *pr;
+       struct stat st;
+       char _target[32];
+       char *target;
        char *device;
        char *mp;
+       int err;
 
-       if (!pr)
+       if (!dev)
                return -1;
 
+       pr = dev->pr;
        device = basename(pr->dev);
 
        if (!strcmp(pr->type, "swap")) {
-               if (hotplug && !auto_swap)
+               if ((type == TYPE_HOTPLUG) && !auto_swap)
                        return -1;
                m = find_swap(pr->uuid, pr->label, device);
                if (m || anon_swap)
@@ -912,133 +1095,205 @@ static int mount_device(struct probe_info *pr, int hotplug)
                return 0;
        }
 
-       if (hotplug && !auto_mount)
+       m = dev->m;
+       if (m && m->extroot)
                return -1;
 
        mp = find_mount_point(pr->dev);
        if (mp) {
-               ULOG_ERR("%s is already mounted on %s\n", pr->dev, mp);
+               if (m && m->type == TYPE_MOUNT && strcmp(m->target, mp)) {
+                       ULOG_ERR("%s is already mounted on %s\n", pr->dev, mp);
+                       err = -1;
+               } else
+                       err = 0;
                free(mp);
-               return -1;
+               return err;
        }
 
-       m = find_block(pr->uuid, pr->label, device, NULL);
-       if (m && m->extroot)
-               return -1;
+       if (type == TYPE_HOTPLUG)
+               blockd_notify(device, m, pr);
 
+       /* Check if device should be mounted & set the target directory */
        if (m) {
-               char *target = m->target;
-               char _target[32];
-               int err = 0;
+               switch (type) {
+               case TYPE_HOTPLUG:
+                       if (m->autofs)
+                               return 0;
+                       if (!auto_mount)
+                               return -1;
+                       break;
+               case TYPE_AUTOFS:
+                       if (!m->autofs)
+                               return -1;
+                       break;
+               case TYPE_DEV:
+                       if (m->autofs)
+                               return -1;
+                       break;
+               }
 
-               if (!target) {
+               if (m->autofs) {
+                       snprintf(_target, sizeof(_target), "/tmp/run/blockd/%s", device);
+                       target = _target;
+               } else if (m->target) {
+                       target = m->target;
+               } else {
                        snprintf(_target, sizeof(_target), "/mnt/%s", device);
                        target = _target;
                }
-               mkdir_p(target);
-
-               if (check_fs)
-                       check_filesystem(pr);
-
-               err = handle_mount(pr->dev, target, pr->type, m);
-               if (err)
-                       ULOG_ERR("mounting %s (%s) as %s failed (%d) - %s\n",
-                                pr->dev, pr->type, target, errno, strerror(errno));
-               else
-                       handle_swapfiles(true);
-               return err;
+       } else if (anon_mount) {
+               snprintf(_target, sizeof(_target), "/mnt/%s", device);
+               target = _target;
+       } else {
+               /* No reason to mount this device */
+               return 0;
        }
 
-       if (anon_mount) {
-               char target[32];
-               int err = 0;
+       /* Mount the device */
 
-               snprintf(target, sizeof(target), "/mnt/%s", device);
-               mkdir_p(target);
+       if (check_fs)
+               check_filesystem(pr);
 
-               if (check_fs)
-                       check_filesystem(pr);
+       mkdir_p(target);
+       if (!lstat(target, &st) && S_ISLNK(st.st_mode))
+               unlink(target);
 
-               err = handle_mount(pr->dev, target, pr->type, NULL);
-               if (err)
-                       ULOG_ERR("mounting %s (%s) as %s failed (%d) - %s\n",
-                                pr->dev, pr->type, target, errno, strerror(errno));
-               else
-                       handle_swapfiles(true);
+       err = handle_mount(pr->dev, target, pr->type, m);
+       if (err) {
+               ULOG_ERR("mounting %s (%s) as %s failed (%d) - %m\n",
+                               pr->dev, pr->type, target, errno);
                return err;
        }
 
+       handle_swapfiles(true);
+
+       if (type != TYPE_AUTOFS)
+               hotplug_call_mount("add", device);
+
        return 0;
 }
 
-static int umount_device(struct probe_info *pr)
+static int umount_device(char *path, int type, bool all)
 {
-       struct mount *m;
-       char *device = basename(pr->dev);
        char *mp;
        int err;
 
-       if (!pr)
-               return -1;
-
-       if (!strcmp(pr->type, "swap"))
-               return -1;
-
-       mp = find_mount_point(pr->dev);
+       mp = find_mount_point(path);
        if (!mp)
                return -1;
+       if (!strcmp(mp, "/") && !all)
+               return 0;
 
-       m = find_block(pr->uuid, pr->label, device, NULL);
-       if (m && m->extroot)
-               return -1;
+       if (type != TYPE_AUTOFS)
+               hotplug_call_mount("remove", basename(path));
 
        err = umount2(mp, MNT_DETACH);
-       if (err)
-               ULOG_ERR("unmounting %s (%s)  failed (%d) - %s\n",
-                        pr->dev, mp, errno, strerror(errno));
-       else
-               ULOG_INFO("unmounted %s (%s)\n",
-                         pr->dev, mp);
+       if (err) {
+               ULOG_ERR("unmounting %s (%s) failed (%d) - %m\n", path, mp,
+                        errno);
+       } else {
+               ULOG_INFO("unmounted %s (%s)\n", path, mp);
+               rmdir(mp);
+       }
 
        free(mp);
        return err;
 }
 
-static int main_hotplug(int argc, char **argv)
+static int mount_action(char *action, char *device, int type)
 {
+       struct device *the_dev, *dev;
        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 (config_load(NULL))
+               return -1;
+       cache_load(0);
 
-               if (err)
-                       ULOG_ERR("umount of %s failed (%d) - %s\n",
-                                mount_point, errno, strerror(errno));
+       the_dev = find_block_device(NULL, NULL, device);
 
-               free(mount_point);
+       if (!strcmp(action, "remove")) {
+               if (type == TYPE_HOTPLUG)
+                       blockd_notify(device, NULL, NULL);
+
+               if (!the_dev || !the_dev->m || the_dev->m->type != TYPE_MOUNT) {
+                       snprintf(path, sizeof(path), "/dev/%s", device);
+                       umount_device(path, type, true);
+               } else
+                       vlist_for_element_to_last_reverse(&devices, the_dev, dev, node)
+                               if (dev->m && dev->m->type == TYPE_MOUNT)
+                                       umount_device(dev->pr->dev, type, true);
                return 0;
-       } else if (strcmp(action, "add")) {
-               ULOG_ERR("Unkown action %s\n", action);
+       } else if (!strcmp(action, "add")) {
+               if (!the_dev)
+                       return -1;
+               if (the_dev->m && the_dev->m->type == TYPE_MOUNT) {
+                       vlist_for_first_to_element(&devices, the_dev, dev, node) {
+                               if (dev->m && dev->m->type == TYPE_MOUNT) {
+                                       int err = mount_device(dev, type);
+                                       if (err)
+                                               return err;
+                               }
+                       }
+                       return 0;
+               } else
+                       return mount_device(the_dev, type);
+       }
+       ULOG_ERR("Unkown action %s\n", action);
+       return -1;
+}
+
+static int main_hotplug(int argc, char **argv)
+{
+       return mount_action(getenv("ACTION"), getenv("DEVNAME"), TYPE_HOTPLUG);
+}
 
+static int main_autofs(int argc, char **argv)
+{
+       int err = 0;
+
+       if (argc < 3)
                return -1;
+
+       if (!strcmp(argv[2], "start")) {
+               struct device *dev;
+               struct probe_info *pr;
+
+               if (config_load(NULL))
+                       return -1;
+
+               cache_load(0);
+               vlist_for_each_element(&devices, dev, node) {
+                       struct mount *m;
+
+                       pr = dev->pr;
+                       if (!strcmp(pr->type, "swap"))
+                               continue;
+
+                       m = dev->m;
+                       if (m && m->extroot)
+                               continue;
+
+                       blockd_notify(pr->dev, m, pr);
+               }
+       } else if (!strcmp(argv[2], "available")) {
+               err = hotplug_call_mount("add", argv[3]);
+       } else if (!strcmp(argv[2], "unavailable")) {
+               err = hotplug_call_mount("remove", argv[3]);
+       } else {
+               if (argc < 4)
+                       return -EINVAL;
+
+               err = mount_action(argv[2], argv[3], TYPE_AUTOFS);
        }
 
-       if (config_load(NULL))
-               return -1;
-       cache_load(0);
+       if (err) {
+               ULOG_ERR("autofs: \"%s\" action has failed: %d\n", argv[2], err);
+       }
 
-       return mount_device(find_block_info(NULL, NULL, path), 1);
+       return err;
 }
 
 static int find_block_mtd(char *name, char *part, int plen)
@@ -1181,7 +1436,8 @@ static int test_fs_support(const char *name)
 
 static int check_extroot(char *path)
 {
-       struct probe_info *pr = NULL;
+       struct device *dev;
+       struct probe_info *pr;
        char devpath[32];
 
 #ifdef UBIFS_EXTROOT
@@ -1204,7 +1460,8 @@ static int check_extroot(char *path)
        }
 #endif
 
-       list_for_each_entry(pr, &devices, list) {
+       vlist_for_each_element(&devices, dev, node) {
+               pr = dev->pr;
                if (!strcmp(pr->dev, devpath)) {
                        struct stat s;
                        FILE *fp = NULL;
@@ -1219,8 +1476,8 @@ static int check_extroot(char *path)
                        if (stat(tag, &s)) {
                                fp = fopen(tag, "w+");
                                if (!fp) {
-                                       ULOG_ERR("extroot: failed to write UUID to %s: %d (%s)\n",
-                                                tag, errno, strerror(errno));
+                                       ULOG_ERR("extroot: failed to write UUID to %s: %d (%m)\n",
+                                                tag, errno);
                                        /* return 0 to continue boot regardless of error */
                                        return 0;
                                }
@@ -1231,14 +1488,14 @@ static int check_extroot(char *path)
 
                        fp = fopen(tag, "r");
                        if (!fp) {
-                               ULOG_ERR("extroot: failed to read UUID from %s: %d (%s)\n",
-                                        tag, errno, strerror(errno));
+                               ULOG_ERR("extroot: failed to read UUID from %s: %d (%m)\n",
+                                        tag, errno);
                                return -1;
                        }
 
                        if (!fgets(uuid, sizeof(uuid), fp))
-                               ULOG_ERR("extroot: failed to read UUID from %s: %d (%s)\n",
-                                        tag, errno, strerror(errno));
+                               ULOG_ERR("extroot: failed to read UUID from %s: %d (%m)\n",
+                                        tag, errno);
                        fclose(fp);
 
                        if (*uuid && !strcasecmp(uuid, pr->uuid))
@@ -1262,6 +1519,7 @@ static int mount_extroot(char *cfg)
        char overlay[] = "/tmp/extroot/overlay";
        char mnt[] = "/tmp/extroot/mnt";
        char *path = mnt;
+       struct device *dev;
        struct probe_info *pr;
        struct mount *m;
        int err = -1;
@@ -1282,19 +1540,23 @@ static int mount_extroot(char *cfg)
        }
 
        /* Find block device pointed by the mount config */
-       pr = find_block_info(m->uuid, m->label, m->device);
+       dev = find_block_device(m->uuid, m->label, m->device);
 
-       if (!pr && delay_root){
+       if (!dev && delay_root){
                ULOG_INFO("extroot: device not present, retrying in %u seconds\n", delay_root);
                sleep(delay_root);
                make_devs();
-               cache_load(0);
-               pr = find_block_info(m->uuid, m->label, m->device);
+               cache_load(1);
+               dev = find_block_device(m->uuid, m->label, m->device);
        }
-       if (pr) {
+       if (dev) {
+               pr = dev->pr;
                if (strncmp(pr->type, "ext", 3) &&
+                   strncmp(pr->type, "f2fs", 4) &&
+                   strncmp(pr->type, "btrfs", 5) &&
+                   strncmp(pr->type, "ntfs", 4) &&
                    strncmp(pr->type, "ubifs", 5)) {
-                       ULOG_ERR("extroot: unsupported filesystem %s, try ext4\n", pr->type);
+                       ULOG_ERR("extroot: unsupported filesystem %s, try ext4, f2fs, btrfs, ntfs or ubifs\n", pr->type);
                        return -1;
                }
 
@@ -1314,8 +1576,8 @@ static int mount_extroot(char *cfg)
                            (m->options) ? (m->options) : (""));
 
                if (err) {
-                       ULOG_ERR("extroot: mounting %s (%s) on %s failed: %d (%s)\n",
-                                pr->dev, pr->type, path, errno, strerror(errno));
+                       ULOG_ERR("extroot: mounting %s (%s) on %s failed: %d (%m)\n",
+                                pr->dev, pr->type, path, errno);
                } else if (m->overlay) {
                        err = check_extroot(path);
                        if (err)
@@ -1332,7 +1594,6 @@ static int mount_extroot(char *cfg)
 
 static int main_extroot(int argc, char **argv)
 {
-       struct probe_info *pr;
        char blkdev_path[32] = { 0 };
        int err = -1;
 #ifdef UBIFS_EXTROOT
@@ -1361,8 +1622,8 @@ static int main_extroot(int argc, char **argv)
        /* Start with looking for MTD partition */
        find_block_mtd("\"rootfs_data\"", blkdev_path, sizeof(blkdev_path));
        if (blkdev_path[0]) {
-               pr = find_block_info(NULL, NULL, blkdev_path);
-               if (pr && !strcmp(pr->type, "jffs2")) {
+               struct device *dev = find_block_device(NULL, NULL, blkdev_path);
+               if (dev && !strcmp(dev->pr->type, "jffs2")) {
                        char cfg[] = "/tmp/jffs_cfg";
 
                        /*
@@ -1408,14 +1669,14 @@ static int main_extroot(int argc, char **argv)
 
 static int main_mount(int argc, char **argv)
 {
-       struct probe_info *pr;
+       struct device *dev;
 
        if (config_load(NULL))
                return -1;
 
        cache_load(1);
-       list_for_each_entry(pr, &devices, list)
-               mount_device(pr, 0);
+       vlist_for_each_element(&devices, dev, node)
+               mount_device(dev, TYPE_DEV);
 
        handle_swapfiles(true);
 
@@ -1424,7 +1685,9 @@ static int main_mount(int argc, char **argv)
 
 static int main_umount(int argc, char **argv)
 {
+       struct device *dev;
        struct probe_info *pr;
+       bool all = false;
 
        if (config_load(NULL))
                return -1;
@@ -1432,15 +1695,30 @@ static int main_umount(int argc, char **argv)
        handle_swapfiles(false);
 
        cache_load(0);
-       list_for_each_entry(pr, &devices, list)
-               umount_device(pr);
+
+       if (argc == 3)
+               all = !strcmp(argv[2], "-a");
+
+       vlist_for_each_element_reverse(&devices, dev, node) {
+               struct mount *m;
+
+               pr = dev->pr;
+               if (!strcmp(pr->type, "swap"))
+                       continue;
+
+               m = dev->m;
+               if (m && m->extroot)
+                       continue;
+
+               umount_device(pr->dev, TYPE_DEV, all);
+       }
 
        return 0;
 }
 
 static int main_detect(int argc, char **argv)
 {
-       struct probe_info *pr;
+       struct device *dev;
 
        cache_load(0);
        printf("config 'global'\n");
@@ -1450,8 +1728,8 @@ static int main_detect(int argc, char **argv)
        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);
+       vlist_for_each_element(&devices, dev, node)
+               print_block_uci(dev->pr);
 
        return 0;
 }
@@ -1459,12 +1737,12 @@ static int main_detect(int argc, char **argv)
 static int main_info(int argc, char **argv)
 {
        int i;
-       struct probe_info *pr;
+       struct device *dev;
 
        cache_load(1);
        if (argc == 2) {
-               list_for_each_entry(pr, &devices, list)
-                       print_block_info(pr);
+               vlist_for_each_element(&devices, dev, node)
+                       print_block_info(dev->pr);
 
                return 0;
        };
@@ -1480,9 +1758,9 @@ static int main_info(int argc, char **argv)
                        ULOG_ERR("%s is not a block device\n", argv[i]);
                        continue;
                }
-               pr = find_block_info(NULL, NULL, argv[i]);
-               if (pr)
-                       print_block_info(pr);
+               dev = find_block_device(NULL, NULL, argv[i]);
+               if (dev)
+                       print_block_info(dev->pr);
        }
 
        return 0;
@@ -1504,6 +1782,7 @@ static int main_swapon(int argc, char **argv)
        FILE *fp;
        char *lineptr;
        size_t s;
+       struct device *dev;
        struct probe_info *pr;
        int flags = 0;
        int pri;
@@ -1528,7 +1807,8 @@ static int main_swapon(int argc, char **argv)
                        return 0;
                case 'a':
                        cache_load(0);
-                       list_for_each_entry(pr, &devices, list) {
+                       vlist_for_each_element(&devices, dev, node) {
+                               pr = dev->pr;
                                if (strcmp(pr->type, "swap"))
                                        continue;
                                if (swapon(pr->dev, 0))
@@ -1543,7 +1823,6 @@ static int main_swapon(int argc, char **argv)
                default:
                        return swapon_usage();
                }
-
        }
 
        if (optind != (argc - 1))
@@ -1635,6 +1914,9 @@ int main(int argc, char **argv)
                if (!strcmp(argv[1], "hotplug"))
                        return main_hotplug(argc, argv);
 
+               if (!strcmp(argv[1], "autofs"))
+                       return main_autofs(argc, argv);
+
                if (!strcmp(argv[1], "extroot"))
                        return main_extroot(argc, argv);