block: support mounting swap by label

diff --git a/block.c b/block.c
index 9c47cc6a10ef7048323e6c8a728d3779836489ea..723c0f0456413c353c32358706e01050ef6b28a9 100644 (file)
--- a/block.c
+++ b/block.c
@@ -114,6 +114,7 @@ static const struct uci_blob_param_list mount_attr_list = {
 enum {
        SWAP_ENABLE,
        SWAP_UUID,
+       SWAP_LABEL,
        SWAP_DEVICE,
        SWAP_PRIO,
        __SWAP_MAX
@@ -122,6 +123,7 @@ enum {
 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 },
 };
@@ -282,13 +284,14 @@ static int swap_add(struct uci_section *s)
        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_DEVICE])
+       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]);
@@ -332,7 +335,7 @@ static int global_add(struct uci_section *s)
        return 0;
 }
 
-static struct mount* find_swap(const char *uuid, const char *device)
+static struct mount* find_swap(const char *uuid, const char *label, const char *device)
 {
        struct mount *m;
 
@@ -341,6 +344,8 @@ static struct mount* find_swap(const char *uuid, const char *device)
                        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;
        }
@@ -631,7 +636,7 @@ static int mount_device(struct blkid_struct_probe *pr, int hotplug)
        if (!strcmp(pr->id->name, "swap")) {
                if (hotplug && !auto_swap)
                        return -1;
-               m = find_swap(pr->uuid, device);
+               m = find_swap(pr->uuid, pr->label, device);
                if (m || anon_swap)
                        swapon(pr->dev, (m) ? (m->prio) : (0));