Merge tag 'rust-6.9' of https://github.com/Rust-for-Linux/linux

[sfrench/cifs-2.6.git] / include / uapi / linux / fs.h

diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
index 2203d3194b91a798b21131bd5886b0d071c5cc0b..45e4e64fd6643ce3a83711cb295c711dd67ca511 100644 (file)
--- a/include/uapi/linux/fs.h
+++ b/include/uapi/linux/fs.h
@@ -64,6 +64,24 @@ struct fstrim_range {
        __u64 minlen;
 };
 
+/*
+ * We include a length field because some filesystems (vfat) have an identifier
+ * that we do want to expose as a UUID, but doesn't have the standard length.
+ *
+ * We use a fixed size buffer beacuse this interface will, by fiat, never
+ * support "UUIDs" longer than 16 bytes; we don't want to force all downstream
+ * users to have to deal with that.
+ */
+struct fsuuid2 {
+       __u8    len;
+       __u8    uuid[16];
+};
+
+struct fs_sysfs_path {
+       __u8                    len;
+       __u8                    name[128];
+};
+
 /* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */
 #define FILE_DEDUPE_RANGE_SAME         0
 #define FILE_DEDUPE_RANGE_DIFFERS      1
@@ -215,6 +233,13 @@ struct fsxattr {
 #define FS_IOC_FSSETXATTR              _IOW('X', 32, struct fsxattr)
 #define FS_IOC_GETFSLABEL              _IOR(0x94, 49, char[FSLABEL_MAX])
 #define FS_IOC_SETFSLABEL              _IOW(0x94, 50, char[FSLABEL_MAX])
+/* Returns the external filesystem UUID, the same one blkid returns */
+#define FS_IOC_GETFSUUID               _IOR(0x15, 0, struct fsuuid2)
+/*
+ * Returns the path component under /sys/fs/ that refers to this filesystem;
+ * also /sys/kernel/debug/ for filesystems with debugfs exports
+ */
+#define FS_IOC_GETFSSYSFSPATH          _IOR(0x15, 1, struct fs_sysfs_path)
 
 /*
  * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)