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6f52b16c | 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
607ca46e DH |
2 | #ifndef _UAPI_LINUX_FS_H |
3 | #define _UAPI_LINUX_FS_H | |
4 | ||
5 | /* | |
68ce7bfc TT |
6 | * This file has definitions for some important file table structures |
7 | * and constants and structures used by various generic file system | |
8 | * ioctl's. Please do not make any changes in this file before | |
9 | * sending patches for review to linux-fsdevel@vger.kernel.org and | |
10 | * linux-api@vger.kernel.org. | |
607ca46e DH |
11 | */ |
12 | ||
13 | #include <linux/limits.h> | |
14 | #include <linux/ioctl.h> | |
15 | #include <linux/types.h> | |
16 | ||
17 | /* | |
18 | * It's silly to have NR_OPEN bigger than NR_FILE, but you can change | |
19 | * the file limit at runtime and only root can increase the per-process | |
20 | * nr_file rlimit, so it's safe to set up a ridiculously high absolute | |
21 | * upper limit on files-per-process. | |
22 | * | |
23 | * Some programs (notably those using select()) may have to be | |
24 | * recompiled to take full advantage of the new limits.. | |
25 | */ | |
26 | ||
27 | /* Fixed constants first: */ | |
28 | #undef NR_OPEN | |
29 | #define INR_OPEN_CUR 1024 /* Initial setting for nfile rlimits */ | |
30 | #define INR_OPEN_MAX 4096 /* Hard limit for nfile rlimits */ | |
31 | ||
32 | #define BLOCK_SIZE_BITS 10 | |
33 | #define BLOCK_SIZE (1<<BLOCK_SIZE_BITS) | |
34 | ||
35 | #define SEEK_SET 0 /* seek relative to beginning of file */ | |
36 | #define SEEK_CUR 1 /* seek relative to current file position */ | |
37 | #define SEEK_END 2 /* seek relative to end of file */ | |
38 | #define SEEK_DATA 3 /* seek to the next data */ | |
39 | #define SEEK_HOLE 4 /* seek to the next hole */ | |
40 | #define SEEK_MAX SEEK_HOLE | |
41 | ||
0a7c3937 | 42 | #define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */ |
da1ce067 | 43 | #define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */ |
0d7a8555 | 44 | #define RENAME_WHITEOUT (1 << 2) /* Whiteout source */ |
0a7c3937 | 45 | |
04b38d60 CH |
46 | struct file_clone_range { |
47 | __s64 src_fd; | |
48 | __u64 src_offset; | |
49 | __u64 src_length; | |
50 | __u64 dest_offset; | |
51 | }; | |
52 | ||
607ca46e DH |
53 | struct fstrim_range { |
54 | __u64 start; | |
55 | __u64 len; | |
56 | __u64 minlen; | |
57 | }; | |
58 | ||
54dbc151 DW |
59 | /* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */ |
60 | #define FILE_DEDUPE_RANGE_SAME 0 | |
61 | #define FILE_DEDUPE_RANGE_DIFFERS 1 | |
62 | ||
63 | /* from struct btrfs_ioctl_file_extent_same_info */ | |
64 | struct file_dedupe_range_info { | |
65 | __s64 dest_fd; /* in - destination file */ | |
66 | __u64 dest_offset; /* in - start of extent in destination */ | |
67 | __u64 bytes_deduped; /* out - total # of bytes we were able | |
68 | * to dedupe from this file. */ | |
69 | /* status of this dedupe operation: | |
70 | * < 0 for error | |
71 | * == FILE_DEDUPE_RANGE_SAME if dedupe succeeds | |
72 | * == FILE_DEDUPE_RANGE_DIFFERS if data differs | |
73 | */ | |
74 | __s32 status; /* out - see above description */ | |
75 | __u32 reserved; /* must be zero */ | |
76 | }; | |
77 | ||
78 | /* from struct btrfs_ioctl_file_extent_same_args */ | |
79 | struct file_dedupe_range { | |
80 | __u64 src_offset; /* in - start of extent in source */ | |
81 | __u64 src_length; /* in - length of extent */ | |
82 | __u16 dest_count; /* in - total elements in info array */ | |
83 | __u16 reserved1; /* must be zero */ | |
84 | __u32 reserved2; /* must be zero */ | |
85 | struct file_dedupe_range_info info[0]; | |
86 | }; | |
87 | ||
607ca46e DH |
88 | /* And dynamically-tunable limits and defaults: */ |
89 | struct files_stat_struct { | |
90 | unsigned long nr_files; /* read only */ | |
91 | unsigned long nr_free_files; /* read only */ | |
92 | unsigned long max_files; /* tunable */ | |
93 | }; | |
94 | ||
95 | struct inodes_stat_t { | |
3942c07c GC |
96 | long nr_inodes; |
97 | long nr_unused; | |
98 | long dummy[5]; /* padding for sysctl ABI compatibility */ | |
607ca46e DH |
99 | }; |
100 | ||
101 | ||
102 | #define NR_FILE 8192 /* this can well be larger on a larger system */ | |
103 | ||
607ca46e DH |
104 | |
105 | /* | |
106 | * These are the fs-independent mount-flags: up to 32 flags are supported | |
107 | */ | |
108 | #define MS_RDONLY 1 /* Mount read-only */ | |
109 | #define MS_NOSUID 2 /* Ignore suid and sgid bits */ | |
110 | #define MS_NODEV 4 /* Disallow access to device special files */ | |
111 | #define MS_NOEXEC 8 /* Disallow program execution */ | |
112 | #define MS_SYNCHRONOUS 16 /* Writes are synced at once */ | |
113 | #define MS_REMOUNT 32 /* Alter flags of a mounted FS */ | |
114 | #define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */ | |
115 | #define MS_DIRSYNC 128 /* Directory modifications are synchronous */ | |
116 | #define MS_NOATIME 1024 /* Do not update access times. */ | |
117 | #define MS_NODIRATIME 2048 /* Do not update directory access times */ | |
118 | #define MS_BIND 4096 | |
119 | #define MS_MOVE 8192 | |
120 | #define MS_REC 16384 | |
121 | #define MS_VERBOSE 32768 /* War is peace. Verbosity is silence. | |
122 | MS_VERBOSE is deprecated. */ | |
123 | #define MS_SILENT 32768 | |
124 | #define MS_POSIXACL (1<<16) /* VFS does not apply the umask */ | |
125 | #define MS_UNBINDABLE (1<<17) /* change to unbindable */ | |
126 | #define MS_PRIVATE (1<<18) /* change to private */ | |
127 | #define MS_SLAVE (1<<19) /* change to slave */ | |
128 | #define MS_SHARED (1<<20) /* change to shared */ | |
129 | #define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */ | |
130 | #define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */ | |
131 | #define MS_I_VERSION (1<<23) /* Update inode I_version field */ | |
132 | #define MS_STRICTATIME (1<<24) /* Always perform atime updates */ | |
0ae45f63 | 133 | #define MS_LAZYTIME (1<<25) /* Update the on-disk [acm]times lazily */ |
ffecfd1a DW |
134 | |
135 | /* These sb flags are internal to the kernel */ | |
93faccbb | 136 | #define MS_SUBMOUNT (1<<26) |
c568d683 | 137 | #define MS_NOREMOTELOCK (1<<27) |
607ca46e DH |
138 | #define MS_NOSEC (1<<28) |
139 | #define MS_BORN (1<<29) | |
140 | #define MS_ACTIVE (1<<30) | |
141 | #define MS_NOUSER (1<<31) | |
142 | ||
143 | /* | |
144 | * Superblock flags that can be altered by MS_REMOUNT | |
145 | */ | |
0ae45f63 TT |
146 | #define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION|\ |
147 | MS_LAZYTIME) | |
607ca46e DH |
148 | |
149 | /* | |
150 | * Old magic mount flag and mask | |
151 | */ | |
152 | #define MS_MGC_VAL 0xC0ED0000 | |
153 | #define MS_MGC_MSK 0xffff0000 | |
154 | ||
334e580a DC |
155 | /* |
156 | * Structure for FS_IOC_FSGETXATTR[A] and FS_IOC_FSSETXATTR. | |
157 | */ | |
158 | struct fsxattr { | |
159 | __u32 fsx_xflags; /* xflags field value (get/set) */ | |
160 | __u32 fsx_extsize; /* extsize field value (get/set)*/ | |
161 | __u32 fsx_nextents; /* nextents field value (get) */ | |
162 | __u32 fsx_projid; /* project identifier (get/set) */ | |
0a6eab8b DW |
163 | __u32 fsx_cowextsize; /* CoW extsize field value (get/set)*/ |
164 | unsigned char fsx_pad[8]; | |
334e580a DC |
165 | }; |
166 | ||
167 | /* | |
168 | * Flags for the fsx_xflags field | |
169 | */ | |
170 | #define FS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */ | |
171 | #define FS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */ | |
172 | #define FS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */ | |
173 | #define FS_XFLAG_APPEND 0x00000010 /* all writes append */ | |
174 | #define FS_XFLAG_SYNC 0x00000020 /* all writes synchronous */ | |
175 | #define FS_XFLAG_NOATIME 0x00000040 /* do not update access time */ | |
176 | #define FS_XFLAG_NODUMP 0x00000080 /* do not include in backups */ | |
177 | #define FS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */ | |
178 | #define FS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */ | |
179 | #define FS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */ | |
180 | #define FS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */ | |
181 | #define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */ | |
182 | #define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */ | |
183 | #define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */ | |
58f88ca2 | 184 | #define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */ |
0a6eab8b | 185 | #define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */ |
334e580a DC |
186 | #define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */ |
187 | ||
607ca46e DH |
188 | /* the read-only stuff doesn't really belong here, but any other place is |
189 | probably as bad and I don't want to create yet another include file. */ | |
190 | ||
191 | #define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */ | |
192 | #define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */ | |
193 | #define BLKRRPART _IO(0x12,95) /* re-read partition table */ | |
194 | #define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */ | |
195 | #define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */ | |
196 | #define BLKRASET _IO(0x12,98) /* set read ahead for block device */ | |
197 | #define BLKRAGET _IO(0x12,99) /* get current read ahead setting */ | |
198 | #define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */ | |
199 | #define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */ | |
200 | #define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */ | |
201 | #define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */ | |
202 | #define BLKSSZGET _IO(0x12,104)/* get block device sector size */ | |
203 | #if 0 | |
204 | #define BLKPG _IO(0x12,105)/* See blkpg.h */ | |
205 | ||
206 | /* Some people are morons. Do not use sizeof! */ | |
207 | ||
208 | #define BLKELVGET _IOR(0x12,106,size_t)/* elevator get */ | |
209 | #define BLKELVSET _IOW(0x12,107,size_t)/* elevator set */ | |
210 | /* This was here just to show that the number is taken - | |
211 | probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */ | |
212 | #endif | |
213 | /* A jump here: 108-111 have been used for various private purposes. */ | |
214 | #define BLKBSZGET _IOR(0x12,112,size_t) | |
215 | #define BLKBSZSET _IOW(0x12,113,size_t) | |
216 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ | |
217 | #define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup) | |
218 | #define BLKTRACESTART _IO(0x12,116) | |
219 | #define BLKTRACESTOP _IO(0x12,117) | |
220 | #define BLKTRACETEARDOWN _IO(0x12,118) | |
221 | #define BLKDISCARD _IO(0x12,119) | |
222 | #define BLKIOMIN _IO(0x12,120) | |
223 | #define BLKIOOPT _IO(0x12,121) | |
224 | #define BLKALIGNOFF _IO(0x12,122) | |
225 | #define BLKPBSZGET _IO(0x12,123) | |
226 | #define BLKDISCARDZEROES _IO(0x12,124) | |
227 | #define BLKSECDISCARD _IO(0x12,125) | |
228 | #define BLKROTATIONAL _IO(0x12,126) | |
229 | #define BLKZEROOUT _IO(0x12,127) | |
3ed05a98 ST |
230 | /* |
231 | * A jump here: 130-131 are reserved for zoned block devices | |
232 | * (see uapi/linux/blkzoned.h) | |
233 | */ | |
607ca46e DH |
234 | |
235 | #define BMAP_IOCTL 1 /* obsolete - kept for compatibility */ | |
236 | #define FIBMAP _IO(0x00,1) /* bmap access */ | |
237 | #define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */ | |
238 | #define FIFREEZE _IOWR('X', 119, int) /* Freeze */ | |
239 | #define FITHAW _IOWR('X', 120, int) /* Thaw */ | |
240 | #define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */ | |
04b38d60 CH |
241 | #define FICLONE _IOW(0x94, 9, int) |
242 | #define FICLONERANGE _IOW(0x94, 13, struct file_clone_range) | |
54dbc151 | 243 | #define FIDEDUPERANGE _IOWR(0x94, 54, struct file_dedupe_range) |
607ca46e DH |
244 | |
245 | #define FS_IOC_GETFLAGS _IOR('f', 1, long) | |
246 | #define FS_IOC_SETFLAGS _IOW('f', 2, long) | |
247 | #define FS_IOC_GETVERSION _IOR('v', 1, long) | |
248 | #define FS_IOC_SETVERSION _IOW('v', 2, long) | |
249 | #define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap) | |
250 | #define FS_IOC32_GETFLAGS _IOR('f', 1, int) | |
251 | #define FS_IOC32_SETFLAGS _IOW('f', 2, int) | |
252 | #define FS_IOC32_GETVERSION _IOR('v', 1, int) | |
253 | #define FS_IOC32_SETVERSION _IOW('v', 2, int) | |
334e580a DC |
254 | #define FS_IOC_FSGETXATTR _IOR ('X', 31, struct fsxattr) |
255 | #define FS_IOC_FSSETXATTR _IOW ('X', 32, struct fsxattr) | |
607ca46e | 256 | |
0b81d077 JK |
257 | /* |
258 | * File system encryption support | |
259 | */ | |
260 | /* Policy provided via an ioctl on the topmost directory */ | |
261 | #define FS_KEY_DESCRIPTOR_SIZE 8 | |
262 | ||
41d5319a TT |
263 | #define FS_POLICY_FLAGS_PAD_4 0x00 |
264 | #define FS_POLICY_FLAGS_PAD_8 0x01 | |
265 | #define FS_POLICY_FLAGS_PAD_16 0x02 | |
266 | #define FS_POLICY_FLAGS_PAD_32 0x03 | |
267 | #define FS_POLICY_FLAGS_PAD_MASK 0x03 | |
268 | #define FS_POLICY_FLAGS_VALID 0x03 | |
269 | ||
270 | /* Encryption algorithms */ | |
271 | #define FS_ENCRYPTION_MODE_INVALID 0 | |
272 | #define FS_ENCRYPTION_MODE_AES_256_XTS 1 | |
273 | #define FS_ENCRYPTION_MODE_AES_256_GCM 2 | |
274 | #define FS_ENCRYPTION_MODE_AES_256_CBC 3 | |
275 | #define FS_ENCRYPTION_MODE_AES_256_CTS 4 | |
b7e7cf7a DW |
276 | #define FS_ENCRYPTION_MODE_AES_128_CBC 5 |
277 | #define FS_ENCRYPTION_MODE_AES_128_CTS 6 | |
41d5319a | 278 | |
0b81d077 JK |
279 | struct fscrypt_policy { |
280 | __u8 version; | |
281 | __u8 contents_encryption_mode; | |
282 | __u8 filenames_encryption_mode; | |
283 | __u8 flags; | |
284 | __u8 master_key_descriptor[FS_KEY_DESCRIPTOR_SIZE]; | |
960e6994 | 285 | }; |
0b81d077 JK |
286 | |
287 | #define FS_IOC_SET_ENCRYPTION_POLICY _IOR('f', 19, struct fscrypt_policy) | |
288 | #define FS_IOC_GET_ENCRYPTION_PWSALT _IOW('f', 20, __u8[16]) | |
289 | #define FS_IOC_GET_ENCRYPTION_POLICY _IOW('f', 21, struct fscrypt_policy) | |
290 | ||
9c8268de JR |
291 | /* Parameters for passing an encryption key into the kernel keyring */ |
292 | #define FS_KEY_DESC_PREFIX "fscrypt:" | |
293 | #define FS_KEY_DESC_PREFIX_SIZE 8 | |
294 | ||
295 | /* Structure that userspace passes to the kernel keyring */ | |
296 | #define FS_MAX_KEY_SIZE 64 | |
297 | ||
298 | struct fscrypt_key { | |
299 | __u32 mode; | |
300 | __u8 raw[FS_MAX_KEY_SIZE]; | |
301 | __u32 size; | |
302 | }; | |
303 | ||
607ca46e DH |
304 | /* |
305 | * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS) | |
68ce7bfc TT |
306 | * |
307 | * Note: for historical reasons, these flags were originally used and | |
308 | * defined for use by ext2/ext3, and then other file systems started | |
309 | * using these flags so they wouldn't need to write their own version | |
310 | * of chattr/lsattr (which was shipped as part of e2fsprogs). You | |
311 | * should think twice before trying to use these flags in new | |
312 | * contexts, or trying to assign these flags, since they are used both | |
313 | * as the UAPI and the on-disk encoding for ext2/3/4. Also, we are | |
314 | * almost out of 32-bit flags. :-) | |
315 | * | |
316 | * We have recently hoisted FS_IOC_FSGETXATTR / FS_IOC_FSSETXATTR from | |
317 | * XFS to the generic FS level interface. This uses a structure that | |
318 | * has padding and hence has more room to grow, so it may be more | |
319 | * appropriate for many new use cases. | |
320 | * | |
321 | * Please do not change these flags or interfaces before checking with | |
322 | * linux-fsdevel@vger.kernel.org and linux-api@vger.kernel.org. | |
607ca46e DH |
323 | */ |
324 | #define FS_SECRM_FL 0x00000001 /* Secure deletion */ | |
325 | #define FS_UNRM_FL 0x00000002 /* Undelete */ | |
326 | #define FS_COMPR_FL 0x00000004 /* Compress file */ | |
327 | #define FS_SYNC_FL 0x00000008 /* Synchronous updates */ | |
328 | #define FS_IMMUTABLE_FL 0x00000010 /* Immutable file */ | |
329 | #define FS_APPEND_FL 0x00000020 /* writes to file may only append */ | |
330 | #define FS_NODUMP_FL 0x00000040 /* do not dump file */ | |
331 | #define FS_NOATIME_FL 0x00000080 /* do not update atime */ | |
332 | /* Reserved for compression usage... */ | |
333 | #define FS_DIRTY_FL 0x00000100 | |
334 | #define FS_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ | |
335 | #define FS_NOCOMP_FL 0x00000400 /* Don't compress */ | |
607ca46e | 336 | /* End compression flags --- maybe not all used */ |
68ce7bfc | 337 | #define FS_ENCRYPT_FL 0x00000800 /* Encrypted file */ |
607ca46e DH |
338 | #define FS_BTREE_FL 0x00001000 /* btree format dir */ |
339 | #define FS_INDEX_FL 0x00001000 /* hash-indexed directory */ | |
340 | #define FS_IMAGIC_FL 0x00002000 /* AFS directory */ | |
341 | #define FS_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */ | |
342 | #define FS_NOTAIL_FL 0x00008000 /* file tail should not be merged */ | |
343 | #define FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ | |
344 | #define FS_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ | |
68ce7bfc | 345 | #define FS_HUGE_FILE_FL 0x00040000 /* Reserved for ext4 */ |
607ca46e | 346 | #define FS_EXTENT_FL 0x00080000 /* Extents */ |
68ce7bfc TT |
347 | #define FS_EA_INODE_FL 0x00200000 /* Inode used for large EA */ |
348 | #define FS_EOFBLOCKS_FL 0x00400000 /* Reserved for ext4 */ | |
607ca46e | 349 | #define FS_NOCOW_FL 0x00800000 /* Do not cow file */ |
68ce7bfc | 350 | #define FS_INLINE_DATA_FL 0x10000000 /* Reserved for ext4 */ |
8b4953e1 | 351 | #define FS_PROJINHERIT_FL 0x20000000 /* Create with parents projid */ |
607ca46e DH |
352 | #define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */ |
353 | ||
354 | #define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */ | |
355 | #define FS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */ | |
356 | ||
357 | ||
358 | #define SYNC_FILE_RANGE_WAIT_BEFORE 1 | |
359 | #define SYNC_FILE_RANGE_WRITE 2 | |
360 | #define SYNC_FILE_RANGE_WAIT_AFTER 4 | |
361 | ||
ddef7ed2 CH |
362 | /* |
363 | * Flags for preadv2/pwritev2: | |
364 | */ | |
365 | ||
366 | typedef int __bitwise __kernel_rwf_t; | |
367 | ||
368 | /* high priority request, poll if possible */ | |
369 | #define RWF_HIPRI ((__force __kernel_rwf_t)0x00000001) | |
370 | ||
371 | /* per-IO O_DSYNC */ | |
372 | #define RWF_DSYNC ((__force __kernel_rwf_t)0x00000002) | |
373 | ||
374 | /* per-IO O_SYNC */ | |
375 | #define RWF_SYNC ((__force __kernel_rwf_t)0x00000004) | |
376 | ||
377 | /* per-IO, return -EAGAIN if operation would block */ | |
378 | #define RWF_NOWAIT ((__force __kernel_rwf_t)0x00000008) | |
379 | ||
380 | /* mask of flags supported by the kernel */ | |
381 | #define RWF_SUPPORTED (RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT) | |
fdd2f5b7 | 382 | |
607ca46e | 383 | #endif /* _UAPI_LINUX_FS_H */ |