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2023-12-09 958e46acc8e900e8569dd467c1af9b8d2d019394 
 kernel/include/uapi/linux/btrfs.h
....@@ -36,17 +36,22 @@
3636 #define BTRFS_DEVICE_PATH_NAME_MAX	1024
3737 #define BTRFS_SUBVOL_NAME_MAX 		4039
3838 
39
-#define BTRFS_SUBVOL_CREATE_ASYNC	(1ULL << 0)
39
+#ifndef __KERNEL__
40
+/* Deprecated since 5.7 */
41
+# define BTRFS_SUBVOL_CREATE_ASYNC	(1ULL << 0)
42
+#endif
4043 #define BTRFS_SUBVOL_RDONLY		(1ULL << 1)
4144 #define BTRFS_SUBVOL_QGROUP_INHERIT	(1ULL << 2)
4245 
4346 #define BTRFS_DEVICE_SPEC_BY_ID		(1ULL << 3)
4447 
48
+#define BTRFS_SUBVOL_SPEC_BY_ID	(1ULL << 4)
49
+
4550 #define BTRFS_VOL_ARG_V2_FLAGS_SUPPORTED		\
46
-			(BTRFS_SUBVOL_CREATE_ASYNC |	\
47
-			BTRFS_SUBVOL_RDONLY |		\
51
+			(BTRFS_SUBVOL_RDONLY |		\
4852 			BTRFS_SUBVOL_QGROUP_INHERIT |	\
49
-			BTRFS_DEVICE_SPEC_BY_ID)
53
+			BTRFS_DEVICE_SPEC_BY_ID |	\
54
+			BTRFS_SUBVOL_SPEC_BY_ID)
5055 
5156 #define BTRFS_FSID_SIZE 16
5257 #define BTRFS_UUID_SIZE 16
....@@ -97,15 +102,28 @@
97102 };
98103 
99104 /*
100
- * flags for subvolumes
105
+ * Arguments for specification of subvolumes or devices, supporting by-name or
106
+ * by-id and flags
101107  *
102
- * Used by:
103
- * struct btrfs_ioctl_vol_args_v2.flags
108
+ * The set of supported flags depends on the ioctl
104109  *
105110  * BTRFS_SUBVOL_RDONLY is also provided/consumed by the following ioctls:
106111  * - BTRFS_IOC_SUBVOL_GETFLAGS
107112  * - BTRFS_IOC_SUBVOL_SETFLAGS
108113  */
114
+
115
+/* Supported flags for BTRFS_IOC_RM_DEV_V2 */
116
+#define BTRFS_DEVICE_REMOVE_ARGS_MASK					\
117
+	(BTRFS_DEVICE_SPEC_BY_ID)
118
+
119
+/* Supported flags for BTRFS_IOC_SNAP_CREATE_V2 and BTRFS_IOC_SUBVOL_CREATE_V2 */
120
+#define BTRFS_SUBVOL_CREATE_ARGS_MASK					\
121
+	 (BTRFS_SUBVOL_RDONLY |						\
122
+	 BTRFS_SUBVOL_QGROUP_INHERIT)
123
+
124
+/* Supported flags for BTRFS_IOC_SNAP_DESTROY_V2 */
125
+#define BTRFS_SUBVOL_DELETE_ARGS_MASK					\
126
+	(BTRFS_SUBVOL_SPEC_BY_ID)
109127 
110128 struct btrfs_ioctl_vol_args_v2 {
111129 	__s64 fd;
....@@ -121,6 +139,7 @@
121139 	union {
122140 		char name[BTRFS_SUBVOL_NAME_MAX + 1];
123141 		__u64 devid;
142
+		__u64 subvolid;
124143 	};
125144 };
126145 
....@@ -224,6 +243,18 @@
224243 	__u8 path[BTRFS_DEVICE_PATH_NAME_MAX];	/* out */
225244 };
226245 
246
+/*
247
+ * Retrieve information about the filesystem
248
+ */
249
+
250
+/* Request information about checksum type and size */
251
+#define BTRFS_FS_INFO_FLAG_CSUM_INFO			(1 << 0)
252
+
253
+/* Request information about filesystem generation */
254
+#define BTRFS_FS_INFO_FLAG_GENERATION			(1 << 1)
255
+/* Request information about filesystem metadata UUID */
256
+#define BTRFS_FS_INFO_FLAG_METADATA_UUID		(1 << 2)
257
+
227258 struct btrfs_ioctl_fs_info_args {
228259 	__u64 max_id;				/* out */
229260 	__u64 num_devices;			/* out */
....@@ -231,8 +262,13 @@
231262 	__u32 nodesize;				/* out */
232263 	__u32 sectorsize;			/* out */
233264 	__u32 clone_alignment;			/* out */
234
-	__u32 reserved32;
235
-	__u64 reserved[122];			/* pad to 1k */
265
+	/* See BTRFS_FS_INFO_FLAG_* */
266
+	__u16 csum_type;			/* out */
267
+	__u16 csum_size;			/* out */
268
+	__u64 flags;				/* in/out */
269
+	__u64 generation;			/* out */
270
+	__u8 metadata_uuid[BTRFS_FSID_SIZE];	/* out */
271
+	__u8 reserved[944];			/* pad to 1k */
236272 };
237273 
238274 /*
....@@ -269,6 +305,8 @@
269305 #define BTRFS_FEATURE_INCOMPAT_RAID56		(1ULL << 7)
270306 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA	(1ULL << 8)
271307 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES		(1ULL << 9)
308
+#define BTRFS_FEATURE_INCOMPAT_METADATA_UUID	(1ULL << 10)
309
+#define BTRFS_FEATURE_INCOMPAT_RAID1C34		(1ULL << 11)
272310 
273311 struct btrfs_ioctl_feature_flags {
274312 	__u64 compat_flags;
....@@ -664,7 +702,12 @@
664702 	/* out values: */
665703 	__u64 values[BTRFS_DEV_STAT_VALUES_MAX];
666704 
667
-	__u64 unused[128 - 2 - BTRFS_DEV_STAT_VALUES_MAX]; /* pad to 1k */
705
+	/*
706
+	 * This pads the struct to 1032 bytes. It was originally meant to pad to
707
+	 * 1024 bytes, but when adding the flags field, the padding calculation
708
+	 * was not adjusted.
709
+	 */
710
+	__u64 unused[128 - 2 - BTRFS_DEV_STAT_VALUES_MAX];
668711 };
669712 
670713 #define BTRFS_QUOTA_CTL_ENABLE	1
....@@ -825,7 +868,9 @@
825868 	BTRFS_ERROR_DEV_TGT_REPLACE,
826869 	BTRFS_ERROR_DEV_MISSING_NOT_FOUND,
827870 	BTRFS_ERROR_DEV_ONLY_WRITABLE,
828
-	BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS
871
+	BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS,
872
+	BTRFS_ERROR_DEV_RAID1C3_MIN_NOT_MET,
873
+	BTRFS_ERROR_DEV_RAID1C4_MIN_NOT_MET,
829874 };
830875 
831876 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
....@@ -835,6 +880,8 @@
835880 #define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
836881 				   struct btrfs_ioctl_vol_args)
837882 #define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
883
+				   struct btrfs_ioctl_vol_args)
884
+#define BTRFS_IOC_FORGET_DEV _IOW(BTRFS_IOCTL_MAGIC, 5, \
838885 				   struct btrfs_ioctl_vol_args)
839886 /* trans start and trans end are dangerous, and only for
840887  * use by applications that know how to avoid the
....@@ -914,10 +961,8 @@
914961 #define BTRFS_IOC_QUOTA_RESCAN_STATUS _IOR(BTRFS_IOCTL_MAGIC, 45, \
915962 			       struct btrfs_ioctl_quota_rescan_args)
916963 #define BTRFS_IOC_QUOTA_RESCAN_WAIT _IO(BTRFS_IOCTL_MAGIC, 46)
917
-#define BTRFS_IOC_GET_FSLABEL _IOR(BTRFS_IOCTL_MAGIC, 49, \
918
-				   char[BTRFS_LABEL_SIZE])
919
-#define BTRFS_IOC_SET_FSLABEL _IOW(BTRFS_IOCTL_MAGIC, 50, \
920
-				   char[BTRFS_LABEL_SIZE])
964
+#define BTRFS_IOC_GET_FSLABEL 	FS_IOC_GETFSLABEL
965
+#define BTRFS_IOC_SET_FSLABEL	FS_IOC_SETFSLABEL
921966 #define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \
922967 				      struct btrfs_ioctl_get_dev_stats)
923968 #define BTRFS_IOC_DEV_REPLACE _IOWR(BTRFS_IOCTL_MAGIC, 53, \
....@@ -940,5 +985,7 @@
940985 				struct btrfs_ioctl_get_subvol_rootref_args)
941986 #define BTRFS_IOC_INO_LOOKUP_USER _IOWR(BTRFS_IOCTL_MAGIC, 62, \
942987 				struct btrfs_ioctl_ino_lookup_user_args)
988
+#define BTRFS_IOC_SNAP_DESTROY_V2 _IOW(BTRFS_IOCTL_MAGIC, 63, \
989
+				struct btrfs_ioctl_vol_args_v2)
943990 
944991 #endif /* _UAPI_LINUX_BTRFS_H */