1 files changed, 177 insertions, 0 deletions
diff --git a/src/basic/filesystems.c b/src/basic/filesystems.c
new file mode 100644
index 0000000..0f71f8e
--- /dev/null
+++ b/src/basic/filesystems.c
@@ -0,0 +1,177 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "filesystems-gperf.h"
+#include "stat-util.h"
+
+const char *fs_type_to_string(statfs_f_type_t magic) {
+
+        switch (magic) {
+#include "filesystem-switch-case.h"
+        }
+
+        return NULL;
+}
+
+
+int fs_type_from_string(const char *name, const statfs_f_type_t **ret) {
+        const struct FilesystemMagic *fs_magic;
+
+        assert(name);
+        assert(ret);
+
+        fs_magic = filesystems_gperf_lookup(name, strlen(name));
+        if (!fs_magic)
+                return -EINVAL;
+
+        *ret = fs_magic->magic;
+        return 0;
+}
+
+int fs_in_group(const struct statfs *s, FilesystemGroups fs_group) {
+        const char *fs;
+        int r;
+
+        NULSTR_FOREACH(fs, filesystem_sets[fs_group].value) {
+                const statfs_f_type_t *magic;
+
+                r = fs_type_from_string(fs, &magic);
+                if (r == 0) {
+                        for (size_t i = 0; i < FILESYSTEM_MAGIC_MAX; i++) {
+                                if (magic[i] == 0)
+                                        break;
+
+                                if (is_fs_type(s, magic[i]))
+                                        return true;
+                        }
+                }
+        }
+
+        return false;
+}
+
+const FilesystemSet filesystem_sets[_FILESYSTEM_SET_MAX] = {
+        [FILESYSTEM_SET_BASIC_API] = {
+                .name = "@basic-api",
+                .help = "Basic filesystem API",
+                .value =
+                "cgroup\0"
+                "cgroup2\0"
+                "devpts\0"
+                "devtmpfs\0"
+                "mqueue\0"
+                "proc\0"
+                "sysfs\0"
+        },
+        [FILESYSTEM_SET_ANONYMOUS] = {
+                .name = "@anonymous",
+                .help = "Anonymous inodes",
+                .value =
+                "anon_inodefs\0"
+                "pipefs\0"
+                "sockfs\0"
+        },
+        [FILESYSTEM_SET_APPLICATION] = {
+                .name = "@application",
+                .help = "Application virtual filesystems",
+                .value =
+                "autofs\0"
+                "fuse\0"
+                "overlay\0"
+        },
+        [FILESYSTEM_SET_AUXILIARY_API] = {
+                .name = "@auxiliary-api",
+                .help = "Auxiliary filesystem API",
+                .value =
+                "binfmt_misc\0"
+                "configfs\0"
+                "efivarfs\0"
+                "fusectl\0"
+                "hugetlbfs\0"
+                "rpc_pipefs\0"
+                "securityfs\0"
+        },
+        [FILESYSTEM_SET_COMMON_BLOCK] = {
+                .name = "@common-block",
+                .help = "Common block device filesystems",
+                .value =
+                "btrfs\0"
+                "erofs\0"
+                "exfat\0"
+                "ext4\0"
+                "f2fs\0"
+                "iso9660\0"
+                "ntfs3\0"
+                "squashfs\0"
+                "udf\0"
+                "vfat\0"
+                "xfs\0"
+        },
+        [FILESYSTEM_SET_HISTORICAL_BLOCK] = {
+                .name = "@historical-block",
+                .help = "Historical block device filesystems",
+                .value =
+                "ext2\0"
+                "ext3\0"
+                "minix\0"
+        },
+        [FILESYSTEM_SET_NETWORK] = {
+                .name = "@network",
+                .help = "Well-known network filesystems",
+                .value =
+                "afs\0"
+                "ceph\0"
+                "cifs\0"
+                "gfs\0"
+                "gfs2\0"
+                "ncp\0"
+                "ncpfs\0"
+                "nfs\0"
+                "nfs4\0"
+                "ocfs2\0"
+                "orangefs\0"
+                "pvfs2\0"
+                "smb3\0"
+                "smbfs\0"
+        },
+        [FILESYSTEM_SET_PRIVILEGED_API] = {
+                .name = "@privileged-api",
+                .help = "Privileged filesystem API",
+                .value =
+                "bpf\0"
+                "debugfs\0"
+                "pstore\0"
+                "tracefs\0"
+        },
+        [FILESYSTEM_SET_SECURITY] = {
+                .name = "@security",
+                .help = "Security/MAC API VFS",
+                .value =
+                "apparmorfs\0"
+                "selinuxfs\0"
+                "smackfs\0"
+        },
+        [FILESYSTEM_SET_TEMPORARY] = {
+                .name = "@temporary",
+                .help = "Temporary filesystems",
+                .value =
+                "ramfs\0"
+                "tmpfs\0"
+        },
+        [FILESYSTEM_SET_KNOWN] = {
+                .name = "@known",
+                .help = "All known filesystems declared in the kernel",
+                .value =
+#include "filesystem-list.h"
+        },
+};
+
+const FilesystemSet *filesystem_set_find(const char *name) {
+        if (isempty(name) || name[0] != '@')
+                return NULL;
+
+        for (FilesystemGroups i = 0; i < _FILESYSTEM_SET_MAX; i++)
+                if (streq(filesystem_sets[i].name, name))
+                        return filesystem_sets + i;
+
+        return NULL;
+}