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David Howells607ca462012-10-13 10:46:48 +01001#ifndef _UAPI_LINUX_FS_H
2#define _UAPI_LINUX_FS_H
3
4/*
5 * This file has definitions for some important file table
6 * structures etc.
7 */
8
9#include <linux/limits.h>
10#include <linux/ioctl.h>
11#include <linux/types.h>
12
13/*
14 * It's silly to have NR_OPEN bigger than NR_FILE, but you can change
15 * the file limit at runtime and only root can increase the per-process
16 * nr_file rlimit, so it's safe to set up a ridiculously high absolute
17 * upper limit on files-per-process.
18 *
19 * Some programs (notably those using select()) may have to be
20 * recompiled to take full advantage of the new limits..
21 */
22
23/* Fixed constants first: */
24#undef NR_OPEN
25#define INR_OPEN_CUR 1024 /* Initial setting for nfile rlimits */
26#define INR_OPEN_MAX 4096 /* Hard limit for nfile rlimits */
27
28#define BLOCK_SIZE_BITS 10
29#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
30
31#define SEEK_SET 0 /* seek relative to beginning of file */
32#define SEEK_CUR 1 /* seek relative to current file position */
33#define SEEK_END 2 /* seek relative to end of file */
34#define SEEK_DATA 3 /* seek to the next data */
35#define SEEK_HOLE 4 /* seek to the next hole */
36#define SEEK_MAX SEEK_HOLE
37
Miklos Szeredi0a7c3932014-04-01 17:08:43 +020038#define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */
Miklos Szeredida1ce062014-04-01 17:08:43 +020039#define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */
Miklos Szeredi0d7a8552014-10-24 00:14:37 +020040#define RENAME_WHITEOUT (1 << 2) /* Whiteout source */
Miklos Szeredi0a7c3932014-04-01 17:08:43 +020041
David Howells607ca462012-10-13 10:46:48 +010042struct fstrim_range {
43 __u64 start;
44 __u64 len;
45 __u64 minlen;
46};
47
48/* And dynamically-tunable limits and defaults: */
49struct files_stat_struct {
50 unsigned long nr_files; /* read only */
51 unsigned long nr_free_files; /* read only */
52 unsigned long max_files; /* tunable */
53};
54
55struct inodes_stat_t {
Glauber Costa3942c072013-08-28 10:17:53 +100056 long nr_inodes;
57 long nr_unused;
58 long dummy[5]; /* padding for sysctl ABI compatibility */
David Howells607ca462012-10-13 10:46:48 +010059};
60
61
62#define NR_FILE 8192 /* this can well be larger on a larger system */
63
David Howells607ca462012-10-13 10:46:48 +010064
65/*
66 * These are the fs-independent mount-flags: up to 32 flags are supported
67 */
68#define MS_RDONLY 1 /* Mount read-only */
69#define MS_NOSUID 2 /* Ignore suid and sgid bits */
70#define MS_NODEV 4 /* Disallow access to device special files */
71#define MS_NOEXEC 8 /* Disallow program execution */
72#define MS_SYNCHRONOUS 16 /* Writes are synced at once */
73#define MS_REMOUNT 32 /* Alter flags of a mounted FS */
74#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
75#define MS_DIRSYNC 128 /* Directory modifications are synchronous */
76#define MS_NOATIME 1024 /* Do not update access times. */
77#define MS_NODIRATIME 2048 /* Do not update directory access times */
78#define MS_BIND 4096
79#define MS_MOVE 8192
80#define MS_REC 16384
81#define MS_VERBOSE 32768 /* War is peace. Verbosity is silence.
82 MS_VERBOSE is deprecated. */
83#define MS_SILENT 32768
84#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
85#define MS_UNBINDABLE (1<<17) /* change to unbindable */
86#define MS_PRIVATE (1<<18) /* change to private */
87#define MS_SLAVE (1<<19) /* change to slave */
88#define MS_SHARED (1<<20) /* change to shared */
89#define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */
90#define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */
91#define MS_I_VERSION (1<<23) /* Update inode I_version field */
92#define MS_STRICTATIME (1<<24) /* Always perform atime updates */
Darrick J. Wongffecfd12013-02-21 16:42:55 -080093
94/* These sb flags are internal to the kernel */
David Howells607ca462012-10-13 10:46:48 +010095#define MS_NOSEC (1<<28)
96#define MS_BORN (1<<29)
97#define MS_ACTIVE (1<<30)
98#define MS_NOUSER (1<<31)
99
100/*
101 * Superblock flags that can be altered by MS_REMOUNT
102 */
103#define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION)
104
105/*
106 * Old magic mount flag and mask
107 */
108#define MS_MGC_VAL 0xC0ED0000
109#define MS_MGC_MSK 0xffff0000
110
David Howells607ca462012-10-13 10:46:48 +0100111/* the read-only stuff doesn't really belong here, but any other place is
112 probably as bad and I don't want to create yet another include file. */
113
114#define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */
115#define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */
116#define BLKRRPART _IO(0x12,95) /* re-read partition table */
117#define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */
118#define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */
119#define BLKRASET _IO(0x12,98) /* set read ahead for block device */
120#define BLKRAGET _IO(0x12,99) /* get current read ahead setting */
121#define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */
122#define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */
123#define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */
124#define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */
125#define BLKSSZGET _IO(0x12,104)/* get block device sector size */
126#if 0
127#define BLKPG _IO(0x12,105)/* See blkpg.h */
128
129/* Some people are morons. Do not use sizeof! */
130
131#define BLKELVGET _IOR(0x12,106,size_t)/* elevator get */
132#define BLKELVSET _IOW(0x12,107,size_t)/* elevator set */
133/* This was here just to show that the number is taken -
134 probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */
135#endif
136/* A jump here: 108-111 have been used for various private purposes. */
137#define BLKBSZGET _IOR(0x12,112,size_t)
138#define BLKBSZSET _IOW(0x12,113,size_t)
139#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
140#define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup)
141#define BLKTRACESTART _IO(0x12,116)
142#define BLKTRACESTOP _IO(0x12,117)
143#define BLKTRACETEARDOWN _IO(0x12,118)
144#define BLKDISCARD _IO(0x12,119)
145#define BLKIOMIN _IO(0x12,120)
146#define BLKIOOPT _IO(0x12,121)
147#define BLKALIGNOFF _IO(0x12,122)
148#define BLKPBSZGET _IO(0x12,123)
149#define BLKDISCARDZEROES _IO(0x12,124)
150#define BLKSECDISCARD _IO(0x12,125)
151#define BLKROTATIONAL _IO(0x12,126)
152#define BLKZEROOUT _IO(0x12,127)
153
154#define BMAP_IOCTL 1 /* obsolete - kept for compatibility */
155#define FIBMAP _IO(0x00,1) /* bmap access */
156#define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */
157#define FIFREEZE _IOWR('X', 119, int) /* Freeze */
158#define FITHAW _IOWR('X', 120, int) /* Thaw */
159#define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */
160
161#define FS_IOC_GETFLAGS _IOR('f', 1, long)
162#define FS_IOC_SETFLAGS _IOW('f', 2, long)
163#define FS_IOC_GETVERSION _IOR('v', 1, long)
164#define FS_IOC_SETVERSION _IOW('v', 2, long)
165#define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap)
166#define FS_IOC32_GETFLAGS _IOR('f', 1, int)
167#define FS_IOC32_SETFLAGS _IOW('f', 2, int)
168#define FS_IOC32_GETVERSION _IOR('v', 1, int)
169#define FS_IOC32_SETVERSION _IOW('v', 2, int)
170
171/*
172 * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)
173 */
174#define FS_SECRM_FL 0x00000001 /* Secure deletion */
175#define FS_UNRM_FL 0x00000002 /* Undelete */
176#define FS_COMPR_FL 0x00000004 /* Compress file */
177#define FS_SYNC_FL 0x00000008 /* Synchronous updates */
178#define FS_IMMUTABLE_FL 0x00000010 /* Immutable file */
179#define FS_APPEND_FL 0x00000020 /* writes to file may only append */
180#define FS_NODUMP_FL 0x00000040 /* do not dump file */
181#define FS_NOATIME_FL 0x00000080 /* do not update atime */
182/* Reserved for compression usage... */
183#define FS_DIRTY_FL 0x00000100
184#define FS_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
185#define FS_NOCOMP_FL 0x00000400 /* Don't compress */
186#define FS_ECOMPR_FL 0x00000800 /* Compression error */
187/* End compression flags --- maybe not all used */
188#define FS_BTREE_FL 0x00001000 /* btree format dir */
189#define FS_INDEX_FL 0x00001000 /* hash-indexed directory */
190#define FS_IMAGIC_FL 0x00002000 /* AFS directory */
191#define FS_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */
192#define FS_NOTAIL_FL 0x00008000 /* file tail should not be merged */
193#define FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
194#define FS_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
195#define FS_EXTENT_FL 0x00080000 /* Extents */
196#define FS_DIRECTIO_FL 0x00100000 /* Use direct i/o */
197#define FS_NOCOW_FL 0x00800000 /* Do not cow file */
198#define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
199
200#define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
201#define FS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
202
203
204#define SYNC_FILE_RANGE_WAIT_BEFORE 1
205#define SYNC_FILE_RANGE_WRITE 2
206#define SYNC_FILE_RANGE_WAIT_AFTER 4
207
208#endif /* _UAPI_LINUX_FS_H */