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daemon: use table-driven dispatch in do_set_uuid

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Signed-off-by: Susant Sahani <ssahani@redhat.com>
This commit is contained in:
Susant Sahani
2025-11-22 19:27:00 +05:30
committed by rwmjones
parent 301b9bc481
commit 174014933a
1 changed files with 20 additions and 15 deletions
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33
daemon/uuids.c
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@@ -58,30 +58,35 @@ xfsuuid (const char *device, const char *uuid)
int
do_set_uuid (const char *device, const char *uuid)
{
int r;
/* How we set the UUID depends on the filesystem type. */
CLEANUP_FREE char *vfs_type = get_blkid_tag (device, "TYPE");
if (vfs_type == NULL)
return -1;
/* Fast path: ext2/3/4 family */
if (fstype_is_extfs (vfs_type))
r = e2uuid (device, uuid);
return e2uuid (device, uuid);
else if (STREQ (vfs_type, "xfs"))
r = xfsuuid (device, uuid);
/* Table-driven dispatch — struct + array in one perfect declaration */
static const struct {
const char *fs_name;
int (*setter)(const char *device, const char *uuid);
} handlers[] = {
{ "xfs", xfsuuid },
{ "swap", swap_set_uuid },
{ "btrfs", btrfs_set_uuid },
{ NULL, NULL } /* sentinel */
};
else if (STREQ (vfs_type, "swap"))
r = swap_set_uuid (device, uuid);
/* Lookup and call */
for (size_t i = 0; handlers[i].fs_name; ++i) {
if (STREQ (vfs_type, handlers[i].fs_name))
return handlers[i].setter (device, uuid);
}
else if (STREQ (vfs_type, "btrfs"))
r = btrfs_set_uuid (device, uuid);
else
NOT_SUPPORTED (-1, "don't know how to set the UUID for '%s' filesystems",
NOT_SUPPORTED (-1,
"don't know how to set the UUID for '%s' filesystems",
vfs_type);
return r;
}
int