1 /****************************************************************************
2  ****************************************************************************
3  ***
4  ***   This header was automatically generated from a Linux kernel header
5  ***   of the same name, to make information necessary for userspace to
6  ***   call into the kernel available to libc.  It contains only constants,
7  ***   structures, and macros generated from the original header, and thus,
8  ***   contains no copyrightable information.
9  ***
10  ***   To edit the content of this header, modify the corresponding
11  ***   source file (e.g. under external/kernel-headers/original/) then
12  ***   run bionic/libc/kernel/tools/update_all.py
13  ***
14  ***   Any manual change here will be lost the next time this script will
15  ***   be run. You've been warned!
16  ***
17  ****************************************************************************
18  ****************************************************************************/
19 #ifndef _UAPI_LINUX_INCREMENTALFS_H
20 #define _UAPI_LINUX_INCREMENTALFS_H
21 #include <linux/limits.h>
22 #include <linux/ioctl.h>
23 #include <linux/types.h>
24 #include <linux/xattr.h>
25 #define INCFS_NAME "incremental-fs"
26 #define INCFS_MAGIC_NUMBER (unsigned long) (0x5346434e49ul)
27 #define INCFS_DATA_FILE_BLOCK_SIZE 4096
28 #define INCFS_HEADER_VER 1
29 #define INCFS_MAX_HASH_SIZE 32
30 #define INCFS_MAX_FILE_ATTR_SIZE 512
31 #define INCFS_PENDING_READS_FILENAME ".pending_reads"
32 #define INCFS_LOG_FILENAME ".log"
33 #define INCFS_BLOCKS_WRITTEN_FILENAME ".blocks_written"
34 #define INCFS_XATTR_ID_NAME (XATTR_USER_PREFIX "incfs.id")
35 #define INCFS_XATTR_SIZE_NAME (XATTR_USER_PREFIX "incfs.size")
36 #define INCFS_XATTR_METADATA_NAME (XATTR_USER_PREFIX "incfs.metadata")
37 #define INCFS_MAX_SIGNATURE_SIZE 8096
38 #define INCFS_SIGNATURE_VERSION 2
39 #define INCFS_SIGNATURE_SECTIONS 2
40 #define INCFS_IOCTL_BASE_CODE 'g'
41 #define INCFS_IOC_CREATE_FILE _IOWR(INCFS_IOCTL_BASE_CODE, 30, struct incfs_new_file_args)
42 #define INCFS_IOC_READ_FILE_SIGNATURE _IOR(INCFS_IOCTL_BASE_CODE, 31, struct incfs_get_file_sig_args)
43 #define INCFS_IOC_FILL_BLOCKS _IOR(INCFS_IOCTL_BASE_CODE, 32, struct incfs_fill_blocks)
44 #define INCFS_IOC_PERMIT_FILL _IOW(INCFS_IOCTL_BASE_CODE, 33, struct incfs_permit_fill)
45 #define INCFS_IOC_GET_FILLED_BLOCKS _IOR(INCFS_IOCTL_BASE_CODE, 34, struct incfs_get_filled_blocks_args)
46 #define INCFS_IOC_CREATE_MAPPED_FILE _IOWR(INCFS_IOCTL_BASE_CODE, 35, struct incfs_create_mapped_file_args)
47 #define INCFS_IOC_GET_BLOCK_COUNT _IOR(INCFS_IOCTL_BASE_CODE, 36, struct incfs_get_block_count_args)
48 #define INCFS_IOC_GET_READ_TIMEOUTS _IOR(INCFS_IOCTL_BASE_CODE, 37, struct incfs_get_read_timeouts_args)
49 #define INCFS_IOC_SET_READ_TIMEOUTS _IOW(INCFS_IOCTL_BASE_CODE, 38, struct incfs_set_read_timeouts_args)
50 #define INCFS_FEATURE_FLAG_COREFS "corefs"
51 #define INCFS_FEATURE_FLAG_ZSTD "zstd"
52 #define INCFS_FEATURE_FLAG_V2 "v2"
53 enum incfs_compression_alg {
54   COMPRESSION_NONE = 0,
55   COMPRESSION_LZ4 = 1,
56   COMPRESSION_ZSTD = 2,
57 };
58 enum incfs_block_flags {
59   INCFS_BLOCK_FLAGS_NONE = 0,
60   INCFS_BLOCK_FLAGS_HASH = 1,
61 };
62 typedef struct {
63   __u8 bytes[16];
64 } incfs_uuid_t __attribute__((aligned(8)));
65 struct incfs_pending_read_info {
66   incfs_uuid_t file_id;
67   __aligned_u64 timestamp_us;
68   __u32 block_index;
69   __u32 serial_number;
70 };
71 struct incfs_pending_read_info2 {
72   incfs_uuid_t file_id;
73   __aligned_u64 timestamp_us;
74   __u32 block_index;
75   __u32 serial_number;
76   __u32 uid;
77   __u32 reserved;
78 };
79 struct incfs_fill_block {
80   __u32 block_index;
81   __u32 data_len;
82   __aligned_u64 data;
83   __u8 compression;
84   __u8 flags;
85   __u16 reserved1;
86   __u32 reserved2;
87   __aligned_u64 reserved3;
88 };
89 struct incfs_fill_blocks {
90   __u64 count;
91   __aligned_u64 fill_blocks;
92 };
93 struct incfs_permit_fill {
94   __u32 file_descriptor;
95 };
96 enum incfs_hash_tree_algorithm {
97   INCFS_HASH_TREE_NONE = 0,
98   INCFS_HASH_TREE_SHA256 = 1
99 };
100 struct incfs_new_file_args {
101   incfs_uuid_t file_id;
102   __aligned_u64 size;
103   __u16 mode;
104   __u16 reserved1;
105   __u32 reserved2;
106   __aligned_u64 directory_path;
107   __aligned_u64 file_name;
108   __aligned_u64 file_attr;
109   __u32 file_attr_len;
110   __u32 reserved4;
111   __aligned_u64 signature_info;
112   __aligned_u64 signature_size;
113   __aligned_u64 reserved6;
114 };
115 struct incfs_get_file_sig_args {
116   __aligned_u64 file_signature;
117   __u32 file_signature_buf_size;
118   __u32 file_signature_len_out;
119 };
120 struct incfs_filled_range {
121   __u32 begin;
122   __u32 end;
123 };
124 struct incfs_get_filled_blocks_args {
125   __aligned_u64 range_buffer;
126   __u32 range_buffer_size;
127   __u32 start_index;
128   __u32 end_index;
129   __u32 total_blocks_out;
130   __u32 data_blocks_out;
131   __u32 range_buffer_size_out;
132   __u32 index_out;
133 };
134 struct incfs_create_mapped_file_args {
135   __aligned_u64 size;
136   __u16 mode;
137   __u16 reserved1;
138   __u32 reserved2;
139   __aligned_u64 directory_path;
140   __aligned_u64 file_name;
141   incfs_uuid_t source_file_id;
142   __aligned_u64 source_offset;
143 };
144 struct incfs_get_block_count_args {
145   __u32 total_data_blocks_out;
146   __u32 filled_data_blocks_out;
147   __u32 total_hash_blocks_out;
148   __u32 filled_hash_blocks_out;
149 };
150 struct incfs_per_uid_read_timeouts {
151   __u32 uid;
152   __u32 min_time_us;
153   __u32 min_pending_time_us;
154   __u32 max_pending_time_us;
155 };
156 struct incfs_get_read_timeouts_args {
157   __aligned_u64 timeouts_array;
158   __u32 timeouts_array_size;
159   __u32 timeouts_array_size_out;
160 };
161 struct incfs_set_read_timeouts_args {
162   __aligned_u64 timeouts_array;
163   __u32 timeouts_array_size;
164 };
165 #endif
166