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-rw-r--r--include/linux/fs.h333
1 files changed, 1 insertions, 332 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 8cb86cfc9719..001c7cff2d48 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1,337 +1,6 @@
1#ifndef _LINUX_FS_H 1#ifndef _LINUX_FS_H
2#define _LINUX_FS_H 2#define _LINUX_FS_H
3 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
38struct fstrim_range {
39 __u64 start;
40 __u64 len;
41 __u64 minlen;
42};
43
44/* And dynamically-tunable limits and defaults: */
45struct files_stat_struct {
46 unsigned long nr_files; /* read only */
47 unsigned long nr_free_files; /* read only */
48 unsigned long max_files; /* tunable */
49};
50
51struct inodes_stat_t {
52 int nr_inodes;
53 int nr_unused;
54 int dummy[5]; /* padding for sysctl ABI compatibility */
55};
56
57
58#define NR_FILE 8192 /* this can well be larger on a larger system */
59
60#define MAY_EXEC 0x00000001
61#define MAY_WRITE 0x00000002
62#define MAY_READ 0x00000004
63#define MAY_APPEND 0x00000008
64#define MAY_ACCESS 0x00000010
65#define MAY_OPEN 0x00000020
66#define MAY_CHDIR 0x00000040
67/* called from RCU mode, don't block */
68#define MAY_NOT_BLOCK 0x00000080
69
70/*
71 * flags in file.f_mode. Note that FMODE_READ and FMODE_WRITE must correspond
72 * to O_WRONLY and O_RDWR via the strange trick in __dentry_open()
73 */
74
75/* file is open for reading */
76#define FMODE_READ ((__force fmode_t)0x1)
77/* file is open for writing */
78#define FMODE_WRITE ((__force fmode_t)0x2)
79/* file is seekable */
80#define FMODE_LSEEK ((__force fmode_t)0x4)
81/* file can be accessed using pread */
82#define FMODE_PREAD ((__force fmode_t)0x8)
83/* file can be accessed using pwrite */
84#define FMODE_PWRITE ((__force fmode_t)0x10)
85/* File is opened for execution with sys_execve / sys_uselib */
86#define FMODE_EXEC ((__force fmode_t)0x20)
87/* File is opened with O_NDELAY (only set for block devices) */
88#define FMODE_NDELAY ((__force fmode_t)0x40)
89/* File is opened with O_EXCL (only set for block devices) */
90#define FMODE_EXCL ((__force fmode_t)0x80)
91/* File is opened using open(.., 3, ..) and is writeable only for ioctls
92 (specialy hack for floppy.c) */
93#define FMODE_WRITE_IOCTL ((__force fmode_t)0x100)
94/* 32bit hashes as llseek() offset (for directories) */
95#define FMODE_32BITHASH ((__force fmode_t)0x200)
96/* 64bit hashes as llseek() offset (for directories) */
97#define FMODE_64BITHASH ((__force fmode_t)0x400)
98
99/*
100 * Don't update ctime and mtime.
101 *
102 * Currently a special hack for the XFS open_by_handle ioctl, but we'll
103 * hopefully graduate it to a proper O_CMTIME flag supported by open(2) soon.
104 */
105#define FMODE_NOCMTIME ((__force fmode_t)0x800)
106
107/* Expect random access pattern */
108#define FMODE_RANDOM ((__force fmode_t)0x1000)
109
110/* File is huge (eg. /dev/kmem): treat loff_t as unsigned */
111#define FMODE_UNSIGNED_OFFSET ((__force fmode_t)0x2000)
112
113/* File is opened with O_PATH; almost nothing can be done with it */
114#define FMODE_PATH ((__force fmode_t)0x4000)
115
116/* File was opened by fanotify and shouldn't generate fanotify events */
117#define FMODE_NONOTIFY ((__force fmode_t)0x1000000)
118
119/*
120 * Flag for rw_copy_check_uvector and compat_rw_copy_check_uvector
121 * that indicates that they should check the contents of the iovec are
122 * valid, but not check the memory that the iovec elements
123 * points too.
124 */
125#define CHECK_IOVEC_ONLY -1
126
127#define SEL_IN 1
128#define SEL_OUT 2
129#define SEL_EX 4
130
131/* public flags for file_system_type */
132#define FS_REQUIRES_DEV 1
133#define FS_BINARY_MOUNTDATA 2
134#define FS_HAS_SUBTYPE 4
135#define FS_REVAL_DOT 16384 /* Check the paths ".", ".." for staleness */
136#define FS_RENAME_DOES_D_MOVE 32768 /* FS will handle d_move()
137 * during rename() internally.
138 */
139
140/*
141 * These are the fs-independent mount-flags: up to 32 flags are supported
142 */
143#define MS_RDONLY 1 /* Mount read-only */
144#define MS_NOSUID 2 /* Ignore suid and sgid bits */
145#define MS_NODEV 4 /* Disallow access to device special files */
146#define MS_NOEXEC 8 /* Disallow program execution */
147#define MS_SYNCHRONOUS 16 /* Writes are synced at once */
148#define MS_REMOUNT 32 /* Alter flags of a mounted FS */
149#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
150#define MS_DIRSYNC 128 /* Directory modifications are synchronous */
151#define MS_NOATIME 1024 /* Do not update access times. */
152#define MS_NODIRATIME 2048 /* Do not update directory access times */
153#define MS_BIND 4096
154#define MS_MOVE 8192
155#define MS_REC 16384
156#define MS_VERBOSE 32768 /* War is peace. Verbosity is silence.
157 MS_VERBOSE is deprecated. */
158#define MS_SILENT 32768
159#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
160#define MS_UNBINDABLE (1<<17) /* change to unbindable */
161#define MS_PRIVATE (1<<18) /* change to private */
162#define MS_SLAVE (1<<19) /* change to slave */
163#define MS_SHARED (1<<20) /* change to shared */
164#define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */
165#define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */
166#define MS_I_VERSION (1<<23) /* Update inode I_version field */
167#define MS_STRICTATIME (1<<24) /* Always perform atime updates */
168#define MS_NOSEC (1<<28)
169#define MS_BORN (1<<29)
170#define MS_ACTIVE (1<<30)
171#define MS_NOUSER (1<<31)
172
173/*
174 * Superblock flags that can be altered by MS_REMOUNT
175 */
176#define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION)
177
178/*
179 * Old magic mount flag and mask
180 */
181#define MS_MGC_VAL 0xC0ED0000
182#define MS_MGC_MSK 0xffff0000
183
184/* Inode flags - they have nothing to superblock flags now */
185
186#define S_SYNC 1 /* Writes are synced at once */
187#define S_NOATIME 2 /* Do not update access times */
188#define S_APPEND 4 /* Append-only file */
189#define S_IMMUTABLE 8 /* Immutable file */
190#define S_DEAD 16 /* removed, but still open directory */
191#define S_NOQUOTA 32 /* Inode is not counted to quota */
192#define S_DIRSYNC 64 /* Directory modifications are synchronous */
193#define S_NOCMTIME 128 /* Do not update file c/mtime */
194#define S_SWAPFILE 256 /* Do not truncate: swapon got its bmaps */
195#define S_PRIVATE 512 /* Inode is fs-internal */
196#define S_IMA 1024 /* Inode has an associated IMA struct */
197#define S_AUTOMOUNT 2048 /* Automount/referral quasi-directory */
198#define S_NOSEC 4096 /* no suid or xattr security attributes */
199
200/*
201 * Note that nosuid etc flags are inode-specific: setting some file-system
202 * flags just means all the inodes inherit those flags by default. It might be
203 * possible to override it selectively if you really wanted to with some
204 * ioctl() that is not currently implemented.
205 *
206 * Exception: MS_RDONLY is always applied to the entire file system.
207 *
208 * Unfortunately, it is possible to change a filesystems flags with it mounted
209 * with files in use. This means that all of the inodes will not have their
210 * i_flags updated. Hence, i_flags no longer inherit the superblock mount
211 * flags, so these have to be checked separately. -- rmk@arm.uk.linux.org
212 */
213#define __IS_FLG(inode,flg) ((inode)->i_sb->s_flags & (flg))
214
215#define IS_RDONLY(inode) ((inode)->i_sb->s_flags & MS_RDONLY)
216#define IS_SYNC(inode) (__IS_FLG(inode, MS_SYNCHRONOUS) || \
217 ((inode)->i_flags & S_SYNC))
218#define IS_DIRSYNC(inode) (__IS_FLG(inode, MS_SYNCHRONOUS|MS_DIRSYNC) || \
219 ((inode)->i_flags & (S_SYNC|S_DIRSYNC)))
220#define IS_MANDLOCK(inode) __IS_FLG(inode, MS_MANDLOCK)
221#define IS_NOATIME(inode) __IS_FLG(inode, MS_RDONLY|MS_NOATIME)
222#define IS_I_VERSION(inode) __IS_FLG(inode, MS_I_VERSION)
223
224#define IS_NOQUOTA(inode) ((inode)->i_flags & S_NOQUOTA)
225#define IS_APPEND(inode) ((inode)->i_flags & S_APPEND)
226#define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE)
227#define IS_POSIXACL(inode) __IS_FLG(inode, MS_POSIXACL)
228
229#define IS_DEADDIR(inode) ((inode)->i_flags & S_DEAD)
230#define IS_NOCMTIME(inode) ((inode)->i_flags & S_NOCMTIME)
231#define IS_SWAPFILE(inode) ((inode)->i_flags & S_SWAPFILE)
232#define IS_PRIVATE(inode) ((inode)->i_flags & S_PRIVATE)
233#define IS_IMA(inode) ((inode)->i_flags & S_IMA)
234#define IS_AUTOMOUNT(inode) ((inode)->i_flags & S_AUTOMOUNT)
235#define IS_NOSEC(inode) ((inode)->i_flags & S_NOSEC)
236
237/* the read-only stuff doesn't really belong here, but any other place is
238 probably as bad and I don't want to create yet another include file. */
239
240#define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */
241#define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */
242#define BLKRRPART _IO(0x12,95) /* re-read partition table */
243#define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */
244#define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */
245#define BLKRASET _IO(0x12,98) /* set read ahead for block device */
246#define BLKRAGET _IO(0x12,99) /* get current read ahead setting */
247#define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */
248#define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */
249#define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */
250#define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */
251#define BLKSSZGET _IO(0x12,104)/* get block device sector size */
252#if 0
253#define BLKPG _IO(0x12,105)/* See blkpg.h */
254
255/* Some people are morons. Do not use sizeof! */
256
257#define BLKELVGET _IOR(0x12,106,size_t)/* elevator get */
258#define BLKELVSET _IOW(0x12,107,size_t)/* elevator set */
259/* This was here just to show that the number is taken -
260 probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */
261#endif
262/* A jump here: 108-111 have been used for various private purposes. */
263#define BLKBSZGET _IOR(0x12,112,size_t)
264#define BLKBSZSET _IOW(0x12,113,size_t)
265#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
266#define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup)
267#define BLKTRACESTART _IO(0x12,116)
268#define BLKTRACESTOP _IO(0x12,117)
269#define BLKTRACETEARDOWN _IO(0x12,118)
270#define BLKDISCARD _IO(0x12,119)
271#define BLKIOMIN _IO(0x12,120)
272#define BLKIOOPT _IO(0x12,121)
273#define BLKALIGNOFF _IO(0x12,122)
274#define BLKPBSZGET _IO(0x12,123)
275#define BLKDISCARDZEROES _IO(0x12,124)
276#define BLKSECDISCARD _IO(0x12,125)
277#define BLKROTATIONAL _IO(0x12,126)
278#define BLKZEROOUT _IO(0x12,127)
279
280#define BMAP_IOCTL 1 /* obsolete - kept for compatibility */
281#define FIBMAP _IO(0x00,1) /* bmap access */
282#define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */
283#define FIFREEZE _IOWR('X', 119, int) /* Freeze */
284#define FITHAW _IOWR('X', 120, int) /* Thaw */
285#define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */
286
287#define FS_IOC_GETFLAGS _IOR('f', 1, long)
288#define FS_IOC_SETFLAGS _IOW('f', 2, long)
289#define FS_IOC_GETVERSION _IOR('v', 1, long)
290#define FS_IOC_SETVERSION _IOW('v', 2, long)
291#define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap)
292#define FS_IOC32_GETFLAGS _IOR('f', 1, int)
293#define FS_IOC32_SETFLAGS _IOW('f', 2, int)
294#define FS_IOC32_GETVERSION _IOR('v', 1, int)
295#define FS_IOC32_SETVERSION _IOW('v', 2, int)
296
297/*
298 * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)
299 */
300#define FS_SECRM_FL 0x00000001 /* Secure deletion */
301#define FS_UNRM_FL 0x00000002 /* Undelete */
302#define FS_COMPR_FL 0x00000004 /* Compress file */
303#define FS_SYNC_FL 0x00000008 /* Synchronous updates */
304#define FS_IMMUTABLE_FL 0x00000010 /* Immutable file */
305#define FS_APPEND_FL 0x00000020 /* writes to file may only append */
306#define FS_NODUMP_FL 0x00000040 /* do not dump file */
307#define FS_NOATIME_FL 0x00000080 /* do not update atime */
308/* Reserved for compression usage... */
309#define FS_DIRTY_FL 0x00000100
310#define FS_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
311#define FS_NOCOMP_FL 0x00000400 /* Don't compress */
312#define FS_ECOMPR_FL 0x00000800 /* Compression error */
313/* End compression flags --- maybe not all used */
314#define FS_BTREE_FL 0x00001000 /* btree format dir */
315#define FS_INDEX_FL 0x00001000 /* hash-indexed directory */
316#define FS_IMAGIC_FL 0x00002000 /* AFS directory */
317#define FS_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */
318#define FS_NOTAIL_FL 0x00008000 /* file tail should not be merged */
319#define FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
320#define FS_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
321#define FS_EXTENT_FL 0x00080000 /* Extents */
322#define FS_DIRECTIO_FL 0x00100000 /* Use direct i/o */
323#define FS_NOCOW_FL 0x00800000 /* Do not cow file */
324#define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
325
326#define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
327#define FS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
328
329
330#define SYNC_FILE_RANGE_WAIT_BEFORE 1
331#define SYNC_FILE_RANGE_WRITE 2
332#define SYNC_FILE_RANGE_WAIT_AFTER 4
333
334#ifdef __KERNEL__
335 4
336#include <linux/linkage.h> 5#include <linux/linkage.h>
337#include <linux/wait.h> 6#include <linux/wait.h>
@@ -360,6 +29,7 @@ struct inodes_stat_t {
360#include <linux/blk_types.h> 29#include <linux/blk_types.h>
361 30
362#include <asm/byteorder.h> 31#include <asm/byteorder.h>
32#include <uapi/linux/fs.h>
363 33
364struct export_operations; 34struct export_operations;
365struct hd_geometry; 35struct hd_geometry;
@@ -2876,5 +2546,4 @@ static inline void inode_has_no_xattr(struct inode *inode)
2876 inode->i_flags |= S_NOSEC; 2546 inode->i_flags |= S_NOSEC;
2877} 2547}
2878 2548
2879#endif /* __KERNEL__ */
2880#endif /* _LINUX_FS_H */ 2549#endif /* _LINUX_FS_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-28 23:51:02 -0500