xref: /linux/tools/include/uapi/linux/fs.h (revision e20194725bb25bb94c238fd9056108ea50a760c0)
1*e2019472SJohn Hubbard /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2*e2019472SJohn Hubbard #ifndef _LINUX_FS_H
3*e2019472SJohn Hubbard #define _LINUX_FS_H
4*e2019472SJohn Hubbard 
5*e2019472SJohn Hubbard /*
6*e2019472SJohn Hubbard  * This file has definitions for some important file table structures
7*e2019472SJohn Hubbard  * and constants and structures used by various generic file system
8*e2019472SJohn Hubbard  * ioctl's.  Please do not make any changes in this file before
9*e2019472SJohn Hubbard  * sending patches for review to linux-fsdevel@vger.kernel.org and
10*e2019472SJohn Hubbard  * linux-api@vger.kernel.org.
11*e2019472SJohn Hubbard  */
12*e2019472SJohn Hubbard 
13*e2019472SJohn Hubbard #include <linux/limits.h>
14*e2019472SJohn Hubbard #include <linux/ioctl.h>
15*e2019472SJohn Hubbard #include <linux/types.h>
16*e2019472SJohn Hubbard #include <linux/fscrypt.h>
17*e2019472SJohn Hubbard 
18*e2019472SJohn Hubbard /* Use of MS_* flags within the kernel is restricted to core mount(2) code. */
19*e2019472SJohn Hubbard #include <linux/mount.h>
20*e2019472SJohn Hubbard 
21*e2019472SJohn Hubbard /*
22*e2019472SJohn Hubbard  * It's silly to have NR_OPEN bigger than NR_FILE, but you can change
23*e2019472SJohn Hubbard  * the file limit at runtime and only root can increase the per-process
24*e2019472SJohn Hubbard  * nr_file rlimit, so it's safe to set up a ridiculously high absolute
25*e2019472SJohn Hubbard  * upper limit on files-per-process.
26*e2019472SJohn Hubbard  *
27*e2019472SJohn Hubbard  * Some programs (notably those using select()) may have to be
28*e2019472SJohn Hubbard  * recompiled to take full advantage of the new limits..
29*e2019472SJohn Hubbard  */
30*e2019472SJohn Hubbard 
31*e2019472SJohn Hubbard /* Fixed constants first: */
32*e2019472SJohn Hubbard #undef NR_OPEN
33*e2019472SJohn Hubbard #define INR_OPEN_CUR 1024	/* Initial setting for nfile rlimits */
34*e2019472SJohn Hubbard #define INR_OPEN_MAX 4096	/* Hard limit for nfile rlimits */
35*e2019472SJohn Hubbard 
36*e2019472SJohn Hubbard #define BLOCK_SIZE_BITS 10
37*e2019472SJohn Hubbard #define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
38*e2019472SJohn Hubbard 
39*e2019472SJohn Hubbard #define SEEK_SET	0	/* seek relative to beginning of file */
40*e2019472SJohn Hubbard #define SEEK_CUR	1	/* seek relative to current file position */
41*e2019472SJohn Hubbard #define SEEK_END	2	/* seek relative to end of file */
42*e2019472SJohn Hubbard #define SEEK_DATA	3	/* seek to the next data */
43*e2019472SJohn Hubbard #define SEEK_HOLE	4	/* seek to the next hole */
44*e2019472SJohn Hubbard #define SEEK_MAX	SEEK_HOLE
45*e2019472SJohn Hubbard 
46*e2019472SJohn Hubbard #define RENAME_NOREPLACE	(1 << 0)	/* Don't overwrite target */
47*e2019472SJohn Hubbard #define RENAME_EXCHANGE		(1 << 1)	/* Exchange source and dest */
48*e2019472SJohn Hubbard #define RENAME_WHITEOUT		(1 << 2)	/* Whiteout source */
49*e2019472SJohn Hubbard 
50*e2019472SJohn Hubbard struct file_clone_range {
51*e2019472SJohn Hubbard 	__s64 src_fd;
52*e2019472SJohn Hubbard 	__u64 src_offset;
53*e2019472SJohn Hubbard 	__u64 src_length;
54*e2019472SJohn Hubbard 	__u64 dest_offset;
55*e2019472SJohn Hubbard };
56*e2019472SJohn Hubbard 
57*e2019472SJohn Hubbard struct fstrim_range {
58*e2019472SJohn Hubbard 	__u64 start;
59*e2019472SJohn Hubbard 	__u64 len;
60*e2019472SJohn Hubbard 	__u64 minlen;
61*e2019472SJohn Hubbard };
62*e2019472SJohn Hubbard 
63*e2019472SJohn Hubbard /*
64*e2019472SJohn Hubbard  * We include a length field because some filesystems (vfat) have an identifier
65*e2019472SJohn Hubbard  * that we do want to expose as a UUID, but doesn't have the standard length.
66*e2019472SJohn Hubbard  *
67*e2019472SJohn Hubbard  * We use a fixed size buffer beacuse this interface will, by fiat, never
68*e2019472SJohn Hubbard  * support "UUIDs" longer than 16 bytes; we don't want to force all downstream
69*e2019472SJohn Hubbard  * users to have to deal with that.
70*e2019472SJohn Hubbard  */
71*e2019472SJohn Hubbard struct fsuuid2 {
72*e2019472SJohn Hubbard 	__u8	len;
73*e2019472SJohn Hubbard 	__u8	uuid[16];
74*e2019472SJohn Hubbard };
75*e2019472SJohn Hubbard 
76*e2019472SJohn Hubbard struct fs_sysfs_path {
77*e2019472SJohn Hubbard 	__u8			len;
78*e2019472SJohn Hubbard 	__u8			name[128];
79*e2019472SJohn Hubbard };
80*e2019472SJohn Hubbard 
81*e2019472SJohn Hubbard /* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */
82*e2019472SJohn Hubbard #define FILE_DEDUPE_RANGE_SAME		0
83*e2019472SJohn Hubbard #define FILE_DEDUPE_RANGE_DIFFERS	1
84*e2019472SJohn Hubbard 
85*e2019472SJohn Hubbard /* from struct btrfs_ioctl_file_extent_same_info */
86*e2019472SJohn Hubbard struct file_dedupe_range_info {
87*e2019472SJohn Hubbard 	__s64 dest_fd;		/* in - destination file */
88*e2019472SJohn Hubbard 	__u64 dest_offset;	/* in - start of extent in destination */
89*e2019472SJohn Hubbard 	__u64 bytes_deduped;	/* out - total # of bytes we were able
90*e2019472SJohn Hubbard 				 * to dedupe from this file. */
91*e2019472SJohn Hubbard 	/* status of this dedupe operation:
92*e2019472SJohn Hubbard 	 * < 0 for error
93*e2019472SJohn Hubbard 	 * == FILE_DEDUPE_RANGE_SAME if dedupe succeeds
94*e2019472SJohn Hubbard 	 * == FILE_DEDUPE_RANGE_DIFFERS if data differs
95*e2019472SJohn Hubbard 	 */
96*e2019472SJohn Hubbard 	__s32 status;		/* out - see above description */
97*e2019472SJohn Hubbard 	__u32 reserved;		/* must be zero */
98*e2019472SJohn Hubbard };
99*e2019472SJohn Hubbard 
100*e2019472SJohn Hubbard /* from struct btrfs_ioctl_file_extent_same_args */
101*e2019472SJohn Hubbard struct file_dedupe_range {
102*e2019472SJohn Hubbard 	__u64 src_offset;	/* in - start of extent in source */
103*e2019472SJohn Hubbard 	__u64 src_length;	/* in - length of extent */
104*e2019472SJohn Hubbard 	__u16 dest_count;	/* in - total elements in info array */
105*e2019472SJohn Hubbard 	__u16 reserved1;	/* must be zero */
106*e2019472SJohn Hubbard 	__u32 reserved2;	/* must be zero */
107*e2019472SJohn Hubbard 	struct file_dedupe_range_info info[];
108*e2019472SJohn Hubbard };
109*e2019472SJohn Hubbard 
110*e2019472SJohn Hubbard /* And dynamically-tunable limits and defaults: */
111*e2019472SJohn Hubbard struct files_stat_struct {
112*e2019472SJohn Hubbard 	unsigned long nr_files;		/* read only */
113*e2019472SJohn Hubbard 	unsigned long nr_free_files;	/* read only */
114*e2019472SJohn Hubbard 	unsigned long max_files;		/* tunable */
115*e2019472SJohn Hubbard };
116*e2019472SJohn Hubbard 
117*e2019472SJohn Hubbard struct inodes_stat_t {
118*e2019472SJohn Hubbard 	long nr_inodes;
119*e2019472SJohn Hubbard 	long nr_unused;
120*e2019472SJohn Hubbard 	long dummy[5];		/* padding for sysctl ABI compatibility */
121*e2019472SJohn Hubbard };
122*e2019472SJohn Hubbard 
123*e2019472SJohn Hubbard 
124*e2019472SJohn Hubbard #define NR_FILE  8192	/* this can well be larger on a larger system */
125*e2019472SJohn Hubbard 
126*e2019472SJohn Hubbard /*
127*e2019472SJohn Hubbard  * Structure for FS_IOC_FSGETXATTR[A] and FS_IOC_FSSETXATTR.
128*e2019472SJohn Hubbard  */
129*e2019472SJohn Hubbard struct fsxattr {
130*e2019472SJohn Hubbard 	__u32		fsx_xflags;	/* xflags field value (get/set) */
131*e2019472SJohn Hubbard 	__u32		fsx_extsize;	/* extsize field value (get/set)*/
132*e2019472SJohn Hubbard 	__u32		fsx_nextents;	/* nextents field value (get)	*/
133*e2019472SJohn Hubbard 	__u32		fsx_projid;	/* project identifier (get/set) */
134*e2019472SJohn Hubbard 	__u32		fsx_cowextsize;	/* CoW extsize field value (get/set)*/
135*e2019472SJohn Hubbard 	unsigned char	fsx_pad[8];
136*e2019472SJohn Hubbard };
137*e2019472SJohn Hubbard 
138*e2019472SJohn Hubbard /*
139*e2019472SJohn Hubbard  * Flags for the fsx_xflags field
140*e2019472SJohn Hubbard  */
141*e2019472SJohn Hubbard #define FS_XFLAG_REALTIME	0x00000001	/* data in realtime volume */
142*e2019472SJohn Hubbard #define FS_XFLAG_PREALLOC	0x00000002	/* preallocated file extents */
143*e2019472SJohn Hubbard #define FS_XFLAG_IMMUTABLE	0x00000008	/* file cannot be modified */
144*e2019472SJohn Hubbard #define FS_XFLAG_APPEND		0x00000010	/* all writes append */
145*e2019472SJohn Hubbard #define FS_XFLAG_SYNC		0x00000020	/* all writes synchronous */
146*e2019472SJohn Hubbard #define FS_XFLAG_NOATIME	0x00000040	/* do not update access time */
147*e2019472SJohn Hubbard #define FS_XFLAG_NODUMP		0x00000080	/* do not include in backups */
148*e2019472SJohn Hubbard #define FS_XFLAG_RTINHERIT	0x00000100	/* create with rt bit set */
149*e2019472SJohn Hubbard #define FS_XFLAG_PROJINHERIT	0x00000200	/* create with parents projid */
150*e2019472SJohn Hubbard #define FS_XFLAG_NOSYMLINKS	0x00000400	/* disallow symlink creation */
151*e2019472SJohn Hubbard #define FS_XFLAG_EXTSIZE	0x00000800	/* extent size allocator hint */
152*e2019472SJohn Hubbard #define FS_XFLAG_EXTSZINHERIT	0x00001000	/* inherit inode extent size */
153*e2019472SJohn Hubbard #define FS_XFLAG_NODEFRAG	0x00002000	/* do not defragment */
154*e2019472SJohn Hubbard #define FS_XFLAG_FILESTREAM	0x00004000	/* use filestream allocator */
155*e2019472SJohn Hubbard #define FS_XFLAG_DAX		0x00008000	/* use DAX for IO */
156*e2019472SJohn Hubbard #define FS_XFLAG_COWEXTSIZE	0x00010000	/* CoW extent size allocator hint */
157*e2019472SJohn Hubbard #define FS_XFLAG_HASATTR	0x80000000	/* no DIFLAG for this	*/
158*e2019472SJohn Hubbard 
159*e2019472SJohn Hubbard /* the read-only stuff doesn't really belong here, but any other place is
160*e2019472SJohn Hubbard    probably as bad and I don't want to create yet another include file. */
161*e2019472SJohn Hubbard 
162*e2019472SJohn Hubbard #define BLKROSET   _IO(0x12,93)	/* set device read-only (0 = read-write) */
163*e2019472SJohn Hubbard #define BLKROGET   _IO(0x12,94)	/* get read-only status (0 = read_write) */
164*e2019472SJohn Hubbard #define BLKRRPART  _IO(0x12,95)	/* re-read partition table */
165*e2019472SJohn Hubbard #define BLKGETSIZE _IO(0x12,96)	/* return device size /512 (long *arg) */
166*e2019472SJohn Hubbard #define BLKFLSBUF  _IO(0x12,97)	/* flush buffer cache */
167*e2019472SJohn Hubbard #define BLKRASET   _IO(0x12,98)	/* set read ahead for block device */
168*e2019472SJohn Hubbard #define BLKRAGET   _IO(0x12,99)	/* get current read ahead setting */
169*e2019472SJohn Hubbard #define BLKFRASET  _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */
170*e2019472SJohn Hubbard #define BLKFRAGET  _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */
171*e2019472SJohn Hubbard #define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */
172*e2019472SJohn Hubbard #define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */
173*e2019472SJohn Hubbard #define BLKSSZGET  _IO(0x12,104)/* get block device sector size */
174*e2019472SJohn Hubbard #if 0
175*e2019472SJohn Hubbard #define BLKPG      _IO(0x12,105)/* See blkpg.h */
176*e2019472SJohn Hubbard 
177*e2019472SJohn Hubbard /* Some people are morons.  Do not use sizeof! */
178*e2019472SJohn Hubbard 
179*e2019472SJohn Hubbard #define BLKELVGET  _IOR(0x12,106,size_t)/* elevator get */
180*e2019472SJohn Hubbard #define BLKELVSET  _IOW(0x12,107,size_t)/* elevator set */
181*e2019472SJohn Hubbard /* This was here just to show that the number is taken -
182*e2019472SJohn Hubbard    probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */
183*e2019472SJohn Hubbard #endif
184*e2019472SJohn Hubbard /* A jump here: 108-111 have been used for various private purposes. */
185*e2019472SJohn Hubbard #define BLKBSZGET  _IOR(0x12,112,size_t)
186*e2019472SJohn Hubbard #define BLKBSZSET  _IOW(0x12,113,size_t)
187*e2019472SJohn Hubbard #define BLKGETSIZE64 _IOR(0x12,114,size_t)	/* return device size in bytes (u64 *arg) */
188*e2019472SJohn Hubbard #define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup)
189*e2019472SJohn Hubbard #define BLKTRACESTART _IO(0x12,116)
190*e2019472SJohn Hubbard #define BLKTRACESTOP _IO(0x12,117)
191*e2019472SJohn Hubbard #define BLKTRACETEARDOWN _IO(0x12,118)
192*e2019472SJohn Hubbard #define BLKDISCARD _IO(0x12,119)
193*e2019472SJohn Hubbard #define BLKIOMIN _IO(0x12,120)
194*e2019472SJohn Hubbard #define BLKIOOPT _IO(0x12,121)
195*e2019472SJohn Hubbard #define BLKALIGNOFF _IO(0x12,122)
196*e2019472SJohn Hubbard #define BLKPBSZGET _IO(0x12,123)
197*e2019472SJohn Hubbard #define BLKDISCARDZEROES _IO(0x12,124)
198*e2019472SJohn Hubbard #define BLKSECDISCARD _IO(0x12,125)
199*e2019472SJohn Hubbard #define BLKROTATIONAL _IO(0x12,126)
200*e2019472SJohn Hubbard #define BLKZEROOUT _IO(0x12,127)
201*e2019472SJohn Hubbard #define BLKGETDISKSEQ _IOR(0x12,128,__u64)
202*e2019472SJohn Hubbard /*
203*e2019472SJohn Hubbard  * A jump here: 130-136 are reserved for zoned block devices
204*e2019472SJohn Hubbard  * (see uapi/linux/blkzoned.h)
205*e2019472SJohn Hubbard  */
206*e2019472SJohn Hubbard 
207*e2019472SJohn Hubbard #define BMAP_IOCTL 1		/* obsolete - kept for compatibility */
208*e2019472SJohn Hubbard #define FIBMAP	   _IO(0x00,1)	/* bmap access */
209*e2019472SJohn Hubbard #define FIGETBSZ   _IO(0x00,2)	/* get the block size used for bmap */
210*e2019472SJohn Hubbard #define FIFREEZE	_IOWR('X', 119, int)	/* Freeze */
211*e2019472SJohn Hubbard #define FITHAW		_IOWR('X', 120, int)	/* Thaw */
212*e2019472SJohn Hubbard #define FITRIM		_IOWR('X', 121, struct fstrim_range)	/* Trim */
213*e2019472SJohn Hubbard #define FICLONE		_IOW(0x94, 9, int)
214*e2019472SJohn Hubbard #define FICLONERANGE	_IOW(0x94, 13, struct file_clone_range)
215*e2019472SJohn Hubbard #define FIDEDUPERANGE	_IOWR(0x94, 54, struct file_dedupe_range)
216*e2019472SJohn Hubbard 
217*e2019472SJohn Hubbard #define FSLABEL_MAX 256	/* Max chars for the interface; each fs may differ */
218*e2019472SJohn Hubbard 
219*e2019472SJohn Hubbard #define	FS_IOC_GETFLAGS			_IOR('f', 1, long)
220*e2019472SJohn Hubbard #define	FS_IOC_SETFLAGS			_IOW('f', 2, long)
221*e2019472SJohn Hubbard #define	FS_IOC_GETVERSION		_IOR('v', 1, long)
222*e2019472SJohn Hubbard #define	FS_IOC_SETVERSION		_IOW('v', 2, long)
223*e2019472SJohn Hubbard #define FS_IOC_FIEMAP			_IOWR('f', 11, struct fiemap)
224*e2019472SJohn Hubbard #define FS_IOC32_GETFLAGS		_IOR('f', 1, int)
225*e2019472SJohn Hubbard #define FS_IOC32_SETFLAGS		_IOW('f', 2, int)
226*e2019472SJohn Hubbard #define FS_IOC32_GETVERSION		_IOR('v', 1, int)
227*e2019472SJohn Hubbard #define FS_IOC32_SETVERSION		_IOW('v', 2, int)
228*e2019472SJohn Hubbard #define FS_IOC_FSGETXATTR		_IOR('X', 31, struct fsxattr)
229*e2019472SJohn Hubbard #define FS_IOC_FSSETXATTR		_IOW('X', 32, struct fsxattr)
230*e2019472SJohn Hubbard #define FS_IOC_GETFSLABEL		_IOR(0x94, 49, char[FSLABEL_MAX])
231*e2019472SJohn Hubbard #define FS_IOC_SETFSLABEL		_IOW(0x94, 50, char[FSLABEL_MAX])
232*e2019472SJohn Hubbard /* Returns the external filesystem UUID, the same one blkid returns */
233*e2019472SJohn Hubbard #define FS_IOC_GETFSUUID		_IOR(0x15, 0, struct fsuuid2)
234*e2019472SJohn Hubbard /*
235*e2019472SJohn Hubbard  * Returns the path component under /sys/fs/ that refers to this filesystem;
236*e2019472SJohn Hubbard  * also /sys/kernel/debug/ for filesystems with debugfs exports
237*e2019472SJohn Hubbard  */
238*e2019472SJohn Hubbard #define FS_IOC_GETFSSYSFSPATH		_IOR(0x15, 1, struct fs_sysfs_path)
239*e2019472SJohn Hubbard 
240*e2019472SJohn Hubbard /*
241*e2019472SJohn Hubbard  * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)
242*e2019472SJohn Hubbard  *
243*e2019472SJohn Hubbard  * Note: for historical reasons, these flags were originally used and
244*e2019472SJohn Hubbard  * defined for use by ext2/ext3, and then other file systems started
245*e2019472SJohn Hubbard  * using these flags so they wouldn't need to write their own version
246*e2019472SJohn Hubbard  * of chattr/lsattr (which was shipped as part of e2fsprogs).  You
247*e2019472SJohn Hubbard  * should think twice before trying to use these flags in new
248*e2019472SJohn Hubbard  * contexts, or trying to assign these flags, since they are used both
249*e2019472SJohn Hubbard  * as the UAPI and the on-disk encoding for ext2/3/4.  Also, we are
250*e2019472SJohn Hubbard  * almost out of 32-bit flags.  :-)
251*e2019472SJohn Hubbard  *
252*e2019472SJohn Hubbard  * We have recently hoisted FS_IOC_FSGETXATTR / FS_IOC_FSSETXATTR from
253*e2019472SJohn Hubbard  * XFS to the generic FS level interface.  This uses a structure that
254*e2019472SJohn Hubbard  * has padding and hence has more room to grow, so it may be more
255*e2019472SJohn Hubbard  * appropriate for many new use cases.
256*e2019472SJohn Hubbard  *
257*e2019472SJohn Hubbard  * Please do not change these flags or interfaces before checking with
258*e2019472SJohn Hubbard  * linux-fsdevel@vger.kernel.org and linux-api@vger.kernel.org.
259*e2019472SJohn Hubbard  */
260*e2019472SJohn Hubbard #define	FS_SECRM_FL			0x00000001 /* Secure deletion */
261*e2019472SJohn Hubbard #define	FS_UNRM_FL			0x00000002 /* Undelete */
262*e2019472SJohn Hubbard #define	FS_COMPR_FL			0x00000004 /* Compress file */
263*e2019472SJohn Hubbard #define FS_SYNC_FL			0x00000008 /* Synchronous updates */
264*e2019472SJohn Hubbard #define FS_IMMUTABLE_FL			0x00000010 /* Immutable file */
265*e2019472SJohn Hubbard #define FS_APPEND_FL			0x00000020 /* writes to file may only append */
266*e2019472SJohn Hubbard #define FS_NODUMP_FL			0x00000040 /* do not dump file */
267*e2019472SJohn Hubbard #define FS_NOATIME_FL			0x00000080 /* do not update atime */
268*e2019472SJohn Hubbard /* Reserved for compression usage... */
269*e2019472SJohn Hubbard #define FS_DIRTY_FL			0x00000100
270*e2019472SJohn Hubbard #define FS_COMPRBLK_FL			0x00000200 /* One or more compressed clusters */
271*e2019472SJohn Hubbard #define FS_NOCOMP_FL			0x00000400 /* Don't compress */
272*e2019472SJohn Hubbard /* End compression flags --- maybe not all used */
273*e2019472SJohn Hubbard #define FS_ENCRYPT_FL			0x00000800 /* Encrypted file */
274*e2019472SJohn Hubbard #define FS_BTREE_FL			0x00001000 /* btree format dir */
275*e2019472SJohn Hubbard #define FS_INDEX_FL			0x00001000 /* hash-indexed directory */
276*e2019472SJohn Hubbard #define FS_IMAGIC_FL			0x00002000 /* AFS directory */
277*e2019472SJohn Hubbard #define FS_JOURNAL_DATA_FL		0x00004000 /* Reserved for ext3 */
278*e2019472SJohn Hubbard #define FS_NOTAIL_FL			0x00008000 /* file tail should not be merged */
279*e2019472SJohn Hubbard #define FS_DIRSYNC_FL			0x00010000 /* dirsync behaviour (directories only) */
280*e2019472SJohn Hubbard #define FS_TOPDIR_FL			0x00020000 /* Top of directory hierarchies*/
281*e2019472SJohn Hubbard #define FS_HUGE_FILE_FL			0x00040000 /* Reserved for ext4 */
282*e2019472SJohn Hubbard #define FS_EXTENT_FL			0x00080000 /* Extents */
283*e2019472SJohn Hubbard #define FS_VERITY_FL			0x00100000 /* Verity protected inode */
284*e2019472SJohn Hubbard #define FS_EA_INODE_FL			0x00200000 /* Inode used for large EA */
285*e2019472SJohn Hubbard #define FS_EOFBLOCKS_FL			0x00400000 /* Reserved for ext4 */
286*e2019472SJohn Hubbard #define FS_NOCOW_FL			0x00800000 /* Do not cow file */
287*e2019472SJohn Hubbard #define FS_DAX_FL			0x02000000 /* Inode is DAX */
288*e2019472SJohn Hubbard #define FS_INLINE_DATA_FL		0x10000000 /* Reserved for ext4 */
289*e2019472SJohn Hubbard #define FS_PROJINHERIT_FL		0x20000000 /* Create with parents projid */
290*e2019472SJohn Hubbard #define FS_CASEFOLD_FL			0x40000000 /* Folder is case insensitive */
291*e2019472SJohn Hubbard #define FS_RESERVED_FL			0x80000000 /* reserved for ext2 lib */
292*e2019472SJohn Hubbard 
293*e2019472SJohn Hubbard #define FS_FL_USER_VISIBLE		0x0003DFFF /* User visible flags */
294*e2019472SJohn Hubbard #define FS_FL_USER_MODIFIABLE		0x000380FF /* User modifiable flags */
295*e2019472SJohn Hubbard 
296*e2019472SJohn Hubbard 
297*e2019472SJohn Hubbard #define SYNC_FILE_RANGE_WAIT_BEFORE	1
298*e2019472SJohn Hubbard #define SYNC_FILE_RANGE_WRITE		2
299*e2019472SJohn Hubbard #define SYNC_FILE_RANGE_WAIT_AFTER	4
300*e2019472SJohn Hubbard #define SYNC_FILE_RANGE_WRITE_AND_WAIT	(SYNC_FILE_RANGE_WRITE | \
301*e2019472SJohn Hubbard 					 SYNC_FILE_RANGE_WAIT_BEFORE | \
302*e2019472SJohn Hubbard 					 SYNC_FILE_RANGE_WAIT_AFTER)
303*e2019472SJohn Hubbard 
304*e2019472SJohn Hubbard /*
305*e2019472SJohn Hubbard  * Flags for preadv2/pwritev2:
306*e2019472SJohn Hubbard  */
307*e2019472SJohn Hubbard 
308*e2019472SJohn Hubbard typedef int __bitwise __kernel_rwf_t;
309*e2019472SJohn Hubbard 
310*e2019472SJohn Hubbard /* high priority request, poll if possible */
311*e2019472SJohn Hubbard #define RWF_HIPRI	((__kernel_rwf_t)0x00000001)
312*e2019472SJohn Hubbard 
313*e2019472SJohn Hubbard /* per-IO O_DSYNC */
314*e2019472SJohn Hubbard #define RWF_DSYNC	((__kernel_rwf_t)0x00000002)
315*e2019472SJohn Hubbard 
316*e2019472SJohn Hubbard /* per-IO O_SYNC */
317*e2019472SJohn Hubbard #define RWF_SYNC	((__kernel_rwf_t)0x00000004)
318*e2019472SJohn Hubbard 
319*e2019472SJohn Hubbard /* per-IO, return -EAGAIN if operation would block */
320*e2019472SJohn Hubbard #define RWF_NOWAIT	((__kernel_rwf_t)0x00000008)
321*e2019472SJohn Hubbard 
322*e2019472SJohn Hubbard /* per-IO O_APPEND */
323*e2019472SJohn Hubbard #define RWF_APPEND	((__kernel_rwf_t)0x00000010)
324*e2019472SJohn Hubbard 
325*e2019472SJohn Hubbard /* per-IO negation of O_APPEND */
326*e2019472SJohn Hubbard #define RWF_NOAPPEND	((__kernel_rwf_t)0x00000020)
327*e2019472SJohn Hubbard 
328*e2019472SJohn Hubbard /* mask of flags supported by the kernel */
329*e2019472SJohn Hubbard #define RWF_SUPPORTED	(RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT |\
330*e2019472SJohn Hubbard 			 RWF_APPEND | RWF_NOAPPEND)
331*e2019472SJohn Hubbard 
332*e2019472SJohn Hubbard /* Pagemap ioctl */
333*e2019472SJohn Hubbard #define PAGEMAP_SCAN	_IOWR('f', 16, struct pm_scan_arg)
334*e2019472SJohn Hubbard 
335*e2019472SJohn Hubbard /* Bitmasks provided in pm_scan_args masks and reported in page_region.categories. */
336*e2019472SJohn Hubbard #define PAGE_IS_WPALLOWED	(1 << 0)
337*e2019472SJohn Hubbard #define PAGE_IS_WRITTEN		(1 << 1)
338*e2019472SJohn Hubbard #define PAGE_IS_FILE		(1 << 2)
339*e2019472SJohn Hubbard #define PAGE_IS_PRESENT		(1 << 3)
340*e2019472SJohn Hubbard #define PAGE_IS_SWAPPED		(1 << 4)
341*e2019472SJohn Hubbard #define PAGE_IS_PFNZERO		(1 << 5)
342*e2019472SJohn Hubbard #define PAGE_IS_HUGE		(1 << 6)
343*e2019472SJohn Hubbard #define PAGE_IS_SOFT_DIRTY	(1 << 7)
344*e2019472SJohn Hubbard 
345*e2019472SJohn Hubbard /*
346*e2019472SJohn Hubbard  * struct page_region - Page region with flags
347*e2019472SJohn Hubbard  * @start:	Start of the region
348*e2019472SJohn Hubbard  * @end:	End of the region (exclusive)
349*e2019472SJohn Hubbard  * @categories:	PAGE_IS_* category bitmask for the region
350*e2019472SJohn Hubbard  */
351*e2019472SJohn Hubbard struct page_region {
352*e2019472SJohn Hubbard 	__u64 start;
353*e2019472SJohn Hubbard 	__u64 end;
354*e2019472SJohn Hubbard 	__u64 categories;
355*e2019472SJohn Hubbard };
356*e2019472SJohn Hubbard 
357*e2019472SJohn Hubbard /* Flags for PAGEMAP_SCAN ioctl */
358*e2019472SJohn Hubbard #define PM_SCAN_WP_MATCHING	(1 << 0)	/* Write protect the pages matched. */
359*e2019472SJohn Hubbard #define PM_SCAN_CHECK_WPASYNC	(1 << 1)	/* Abort the scan when a non-WP-enabled page is found. */
360*e2019472SJohn Hubbard 
361*e2019472SJohn Hubbard /*
362*e2019472SJohn Hubbard  * struct pm_scan_arg - Pagemap ioctl argument
363*e2019472SJohn Hubbard  * @size:		Size of the structure
364*e2019472SJohn Hubbard  * @flags:		Flags for the IOCTL
365*e2019472SJohn Hubbard  * @start:		Starting address of the region
366*e2019472SJohn Hubbard  * @end:		Ending address of the region
367*e2019472SJohn Hubbard  * @walk_end		Address where the scan stopped (written by kernel).
368*e2019472SJohn Hubbard  *			walk_end == end (address tags cleared) informs that the scan completed on entire range.
369*e2019472SJohn Hubbard  * @vec:		Address of page_region struct array for output
370*e2019472SJohn Hubbard  * @vec_len:		Length of the page_region struct array
371*e2019472SJohn Hubbard  * @max_pages:		Optional limit for number of returned pages (0 = disabled)
372*e2019472SJohn Hubbard  * @category_inverted:	PAGE_IS_* categories which values match if 0 instead of 1
373*e2019472SJohn Hubbard  * @category_mask:	Skip pages for which any category doesn't match
374*e2019472SJohn Hubbard  * @category_anyof_mask: Skip pages for which no category matches
375*e2019472SJohn Hubbard  * @return_mask:	PAGE_IS_* categories that are to be reported in `page_region`s returned
376*e2019472SJohn Hubbard  */
377*e2019472SJohn Hubbard struct pm_scan_arg {
378*e2019472SJohn Hubbard 	__u64 size;
379*e2019472SJohn Hubbard 	__u64 flags;
380*e2019472SJohn Hubbard 	__u64 start;
381*e2019472SJohn Hubbard 	__u64 end;
382*e2019472SJohn Hubbard 	__u64 walk_end;
383*e2019472SJohn Hubbard 	__u64 vec;
384*e2019472SJohn Hubbard 	__u64 vec_len;
385*e2019472SJohn Hubbard 	__u64 max_pages;
386*e2019472SJohn Hubbard 	__u64 category_inverted;
387*e2019472SJohn Hubbard 	__u64 category_mask;
388*e2019472SJohn Hubbard 	__u64 category_anyof_mask;
389*e2019472SJohn Hubbard 	__u64 return_mask;
390*e2019472SJohn Hubbard };
391*e2019472SJohn Hubbard 
392*e2019472SJohn Hubbard #endif /* _LINUX_FS_H */
393