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-rw-r--r--tools/include/uapi/linux/mount.h119
1 files changed, 117 insertions, 2 deletions
diff --git a/tools/include/uapi/linux/mount.h b/tools/include/uapi/linux/mount.h
index 96a0240f23fe..7fa67c2031a5 100644
--- a/tools/include/uapi/linux/mount.h
+++ b/tools/include/uapi/linux/mount.h
@@ -1,6 +1,8 @@
#ifndef _UAPI_LINUX_MOUNT_H
#define _UAPI_LINUX_MOUNT_H
+#include <linux/types.h>
+
/*
* These are the fs-independent mount-flags: up to 32 flags are supported
*
@@ -16,6 +18,7 @@
#define MS_REMOUNT 32 /* Alter flags of a mounted FS */
#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
#define MS_DIRSYNC 128 /* Directory modifications are synchronous */
+#define MS_NOSYMFOLLOW 256 /* Do not follow symlinks */
#define MS_NOATIME 1024 /* Do not update access times. */
#define MS_NODIRATIME 2048 /* Do not update directory access times */
#define MS_BIND 4096
@@ -70,7 +73,9 @@
#define MOVE_MOUNT_T_SYMLINKS 0x00000010 /* Follow symlinks on to path */
#define MOVE_MOUNT_T_AUTOMOUNTS 0x00000020 /* Follow automounts on to path */
#define MOVE_MOUNT_T_EMPTY_PATH 0x00000040 /* Empty to path permitted */
-#define MOVE_MOUNT__MASK 0x00000077
+#define MOVE_MOUNT_SET_GROUP 0x00000100 /* Set sharing group instead */
+#define MOVE_MOUNT_BENEATH 0x00000200 /* Mount beneath top mount */
+#define MOVE_MOUNT__MASK 0x00000377
/*
* fsopen() flags.
@@ -95,8 +100,9 @@ enum fsconfig_command {
FSCONFIG_SET_PATH = 3, /* Set parameter, supplying an object by path */
FSCONFIG_SET_PATH_EMPTY = 4, /* Set parameter, supplying an object by (empty) path */
FSCONFIG_SET_FD = 5, /* Set parameter, supplying an object by fd */
- FSCONFIG_CMD_CREATE = 6, /* Invoke superblock creation */
+ FSCONFIG_CMD_CREATE = 6, /* Create new or reuse existing superblock */
FSCONFIG_CMD_RECONFIGURE = 7, /* Invoke superblock reconfiguration */
+ FSCONFIG_CMD_CREATE_EXCL = 8, /* Create new superblock, fail if reusing existing superblock */
};
/*
@@ -116,5 +122,114 @@ enum fsconfig_command {
#define MOUNT_ATTR_NOATIME 0x00000010 /* - Do not update access times. */
#define MOUNT_ATTR_STRICTATIME 0x00000020 /* - Always perform atime updates */
#define MOUNT_ATTR_NODIRATIME 0x00000080 /* Do not update directory access times */
+#define MOUNT_ATTR_IDMAP 0x00100000 /* Idmap mount to @userns_fd in struct mount_attr. */
+#define MOUNT_ATTR_NOSYMFOLLOW 0x00200000 /* Do not follow symlinks */
+
+/*
+ * mount_setattr()
+ */
+struct mount_attr {
+ __u64 attr_set;
+ __u64 attr_clr;
+ __u64 propagation;
+ __u64 userns_fd;
+};
+
+/* List of all mount_attr versions. */
+#define MOUNT_ATTR_SIZE_VER0 32 /* sizeof first published struct */
+
+
+/*
+ * Structure for getting mount/superblock/filesystem info with statmount(2).
+ *
+ * The interface is similar to statx(2): individual fields or groups can be
+ * selected with the @mask argument of statmount(). Kernel will set the @mask
+ * field according to the supported fields.
+ *
+ * If string fields are selected, then the caller needs to pass a buffer that
+ * has space after the fixed part of the structure. Nul terminated strings are
+ * copied there and offsets relative to @str are stored in the relevant fields.
+ * If the buffer is too small, then EOVERFLOW is returned. The actually used
+ * size is returned in @size.
+ */
+struct statmount {
+ __u32 size; /* Total size, including strings */
+ __u32 mnt_opts; /* [str] Options (comma separated, escaped) */
+ __u64 mask; /* What results were written */
+ __u32 sb_dev_major; /* Device ID */
+ __u32 sb_dev_minor;
+ __u64 sb_magic; /* ..._SUPER_MAGIC */
+ __u32 sb_flags; /* SB_{RDONLY,SYNCHRONOUS,DIRSYNC,LAZYTIME} */
+ __u32 fs_type; /* [str] Filesystem type */
+ __u64 mnt_id; /* Unique ID of mount */
+ __u64 mnt_parent_id; /* Unique ID of parent (for root == mnt_id) */
+ __u32 mnt_id_old; /* Reused IDs used in proc/.../mountinfo */
+ __u32 mnt_parent_id_old;
+ __u64 mnt_attr; /* MOUNT_ATTR_... */
+ __u64 mnt_propagation; /* MS_{SHARED,SLAVE,PRIVATE,UNBINDABLE} */
+ __u64 mnt_peer_group; /* ID of shared peer group */
+ __u64 mnt_master; /* Mount receives propagation from this ID */
+ __u64 propagate_from; /* Propagation from in current namespace */
+ __u32 mnt_root; /* [str] Root of mount relative to root of fs */
+ __u32 mnt_point; /* [str] Mountpoint relative to current root */
+ __u64 mnt_ns_id; /* ID of the mount namespace */
+ __u32 fs_subtype; /* [str] Subtype of fs_type (if any) */
+ __u32 sb_source; /* [str] Source string of the mount */
+ __u32 opt_num; /* Number of fs options */
+ __u32 opt_array; /* [str] Array of nul terminated fs options */
+ __u32 opt_sec_num; /* Number of security options */
+ __u32 opt_sec_array; /* [str] Array of nul terminated security options */
+ __u64 supported_mask; /* Mask flags that this kernel supports */
+ __u32 mnt_uidmap_num; /* Number of uid mappings */
+ __u32 mnt_uidmap; /* [str] Array of uid mappings (as seen from callers namespace) */
+ __u32 mnt_gidmap_num; /* Number of gid mappings */
+ __u32 mnt_gidmap; /* [str] Array of gid mappings (as seen from callers namespace) */
+ __u64 __spare2[43];
+ char str[]; /* Variable size part containing strings */
+};
+
+/*
+ * Structure for passing mount ID and miscellaneous parameters to statmount(2)
+ * and listmount(2).
+ *
+ * For statmount(2) @param represents the request mask.
+ * For listmount(2) @param represents the last listed mount id (or zero).
+ */
+struct mnt_id_req {
+ __u32 size;
+ __u32 spare;
+ __u64 mnt_id;
+ __u64 param;
+ __u64 mnt_ns_id;
+};
+
+/* List of all mnt_id_req versions. */
+#define MNT_ID_REQ_SIZE_VER0 24 /* sizeof first published struct */
+#define MNT_ID_REQ_SIZE_VER1 32 /* sizeof second published struct */
+
+/*
+ * @mask bits for statmount(2)
+ */
+#define STATMOUNT_SB_BASIC 0x00000001U /* Want/got sb_... */
+#define STATMOUNT_MNT_BASIC 0x00000002U /* Want/got mnt_... */
+#define STATMOUNT_PROPAGATE_FROM 0x00000004U /* Want/got propagate_from */
+#define STATMOUNT_MNT_ROOT 0x00000008U /* Want/got mnt_root */
+#define STATMOUNT_MNT_POINT 0x00000010U /* Want/got mnt_point */
+#define STATMOUNT_FS_TYPE 0x00000020U /* Want/got fs_type */
+#define STATMOUNT_MNT_NS_ID 0x00000040U /* Want/got mnt_ns_id */
+#define STATMOUNT_MNT_OPTS 0x00000080U /* Want/got mnt_opts */
+#define STATMOUNT_FS_SUBTYPE 0x00000100U /* Want/got fs_subtype */
+#define STATMOUNT_SB_SOURCE 0x00000200U /* Want/got sb_source */
+#define STATMOUNT_OPT_ARRAY 0x00000400U /* Want/got opt_... */
+#define STATMOUNT_OPT_SEC_ARRAY 0x00000800U /* Want/got opt_sec... */
+#define STATMOUNT_SUPPORTED_MASK 0x00001000U /* Want/got supported mask flags */
+#define STATMOUNT_MNT_UIDMAP 0x00002000U /* Want/got uidmap... */
+#define STATMOUNT_MNT_GIDMAP 0x00004000U /* Want/got gidmap... */
+
+/*
+ * Special @mnt_id values that can be passed to listmount
+ */
+#define LSMT_ROOT 0xffffffffffffffff /* root mount */
+#define LISTMOUNT_REVERSE (1 << 0) /* List later mounts first */
#endif /* _UAPI_LINUX_MOUNT_H */