| #ifndef _UAPI_LINUX_FS_H |
| #define _UAPI_LINUX_FS_H |
| |
| /* |
| * This file has definitions for some important file table structures |
| * and constants and structures used by various generic file system |
| * ioctl's. Please do not make any changes in this file before |
| * sending patches for review to linux-fsdevel@vger.kernel.org and |
| * linux-api@vger.kernel.org. |
| */ |
| |
| #include <linux/limits.h> |
| #include <linux/ioctl.h> |
| #include <linux/types.h> |
| |
| /* |
| * It's silly to have NR_OPEN bigger than NR_FILE, but you can change |
| * the file limit at runtime and only root can increase the per-process |
| * nr_file rlimit, so it's safe to set up a ridiculously high absolute |
| * upper limit on files-per-process. |
| * |
| * Some programs (notably those using select()) may have to be |
| * recompiled to take full advantage of the new limits.. |
| */ |
| |
| /* Fixed constants first: */ |
| #undef NR_OPEN |
| #define INR_OPEN_CUR 1024 /* Initial setting for nfile rlimits */ |
| #define INR_OPEN_MAX 4096 /* Hard limit for nfile rlimits */ |
| |
| #define BLOCK_SIZE_BITS 10 |
| #define BLOCK_SIZE (1<<BLOCK_SIZE_BITS) |
| |
| #define SEEK_SET 0 /* seek relative to beginning of file */ |
| #define SEEK_CUR 1 /* seek relative to current file position */ |
| #define SEEK_END 2 /* seek relative to end of file */ |
| #define SEEK_DATA 3 /* seek to the next data */ |
| #define SEEK_HOLE 4 /* seek to the next hole */ |
| #define SEEK_MAX SEEK_HOLE |
| |
| #define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */ |
| #define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */ |
| #define RENAME_WHITEOUT (1 << 2) /* Whiteout source */ |
| |
| struct file_clone_range { |
| __s64 src_fd; |
| __u64 src_offset; |
| __u64 src_length; |
| __u64 dest_offset; |
| }; |
| |
| struct fstrim_range { |
| __u64 start; |
| __u64 len; |
| __u64 minlen; |
| }; |
| |
| /* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */ |
| #define FILE_DEDUPE_RANGE_SAME 0 |
| #define FILE_DEDUPE_RANGE_DIFFERS 1 |
| |
| /* from struct btrfs_ioctl_file_extent_same_info */ |
| struct file_dedupe_range_info { |
| __s64 dest_fd; /* in - destination file */ |
| __u64 dest_offset; /* in - start of extent in destination */ |
| __u64 bytes_deduped; /* out - total # of bytes we were able |
| * to dedupe from this file. */ |
| /* status of this dedupe operation: |
| * < 0 for error |
| * == FILE_DEDUPE_RANGE_SAME if dedupe succeeds |
| * == FILE_DEDUPE_RANGE_DIFFERS if data differs |
| */ |
| __s32 status; /* out - see above description */ |
| __u32 reserved; /* must be zero */ |
| }; |
| |
| /* from struct btrfs_ioctl_file_extent_same_args */ |
| struct file_dedupe_range { |
| __u64 src_offset; /* in - start of extent in source */ |
| __u64 src_length; /* in - length of extent */ |
| __u16 dest_count; /* in - total elements in info array */ |
| __u16 reserved1; /* must be zero */ |
| __u32 reserved2; /* must be zero */ |
| struct file_dedupe_range_info info[0]; |
| }; |
| |
| /* And dynamically-tunable limits and defaults: */ |
| struct files_stat_struct { |
| unsigned long nr_files; /* read only */ |
| unsigned long nr_free_files; /* read only */ |
| unsigned long max_files; /* tunable */ |
| }; |
| |
| struct inodes_stat_t { |
| long nr_inodes; |
| long nr_unused; |
| long dummy[5]; /* padding for sysctl ABI compatibility */ |
| }; |
| |
| |
| #define NR_FILE 8192 /* this can well be larger on a larger system */ |
| |
| |
| /* |
| * These are the fs-independent mount-flags: up to 32 flags are supported |
| */ |
| #define MS_RDONLY 1 /* Mount read-only */ |
| #define MS_NOSUID 2 /* Ignore suid and sgid bits */ |
| #define MS_NODEV 4 /* Disallow access to device special files */ |
| #define MS_NOEXEC 8 /* Disallow program execution */ |
| #define MS_SYNCHRONOUS 16 /* Writes are synced at once */ |
| #define MS_REMOUNT 32 /* Alter flags of a mounted FS */ |
| #define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */ |
| #define MS_DIRSYNC 128 /* Directory modifications are synchronous */ |
| #define MS_NOATIME 1024 /* Do not update access times. */ |
| #define MS_NODIRATIME 2048 /* Do not update directory access times */ |
| #define MS_BIND 4096 |
| #define MS_MOVE 8192 |
| #define MS_REC 16384 |
| #define MS_VERBOSE 32768 /* War is peace. Verbosity is silence. |
| MS_VERBOSE is deprecated. */ |
| #define MS_SILENT 32768 |
| #define MS_POSIXACL (1<<16) /* VFS does not apply the umask */ |
| #define MS_UNBINDABLE (1<<17) /* change to unbindable */ |
| #define MS_PRIVATE (1<<18) /* change to private */ |
| #define MS_SLAVE (1<<19) /* change to slave */ |
| #define MS_SHARED (1<<20) /* change to shared */ |
| #define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */ |
| #define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */ |
| #define MS_I_VERSION (1<<23) /* Update inode I_version field */ |
| #define MS_STRICTATIME (1<<24) /* Always perform atime updates */ |
| #define MS_LAZYTIME (1<<25) /* Update the on-disk [acm]times lazily */ |
| |
| /* These sb flags are internal to the kernel */ |
| #define MS_NOREMOTELOCK (1<<27) |
| #define MS_NOSEC (1<<28) |
| #define MS_BORN (1<<29) |
| #define MS_ACTIVE (1<<30) |
| #define MS_NOUSER (1<<31) |
| |
| /* |
| * Superblock flags that can be altered by MS_REMOUNT |
| */ |
| #define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION|\ |
| MS_LAZYTIME) |
| |
| /* |
| * Old magic mount flag and mask |
| */ |
| #define MS_MGC_VAL 0xC0ED0000 |
| #define MS_MGC_MSK 0xffff0000 |
| |
| /* |
| * Structure for FS_IOC_FSGETXATTR[A] and FS_IOC_FSSETXATTR. |
| */ |
| struct fsxattr { |
| __u32 fsx_xflags; /* xflags field value (get/set) */ |
| __u32 fsx_extsize; /* extsize field value (get/set)*/ |
| __u32 fsx_nextents; /* nextents field value (get) */ |
| __u32 fsx_projid; /* project identifier (get/set) */ |
| __u32 fsx_cowextsize; /* CoW extsize field value (get/set)*/ |
| unsigned char fsx_pad[8]; |
| }; |
| |
| /* |
| * Flags for the fsx_xflags field |
| */ |
| #define FS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */ |
| #define FS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */ |
| #define FS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */ |
| #define FS_XFLAG_APPEND 0x00000010 /* all writes append */ |
| #define FS_XFLAG_SYNC 0x00000020 /* all writes synchronous */ |
| #define FS_XFLAG_NOATIME 0x00000040 /* do not update access time */ |
| #define FS_XFLAG_NODUMP 0x00000080 /* do not include in backups */ |
| #define FS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */ |
| #define FS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */ |
| #define FS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */ |
| #define FS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */ |
| #define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */ |
| #define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */ |
| #define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */ |
| #define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */ |
| #define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */ |
| #define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */ |
| |
| /* the read-only stuff doesn't really belong here, but any other place is |
| probably as bad and I don't want to create yet another include file. */ |
| |
| #define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */ |
| #define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */ |
| #define BLKRRPART _IO(0x12,95) /* re-read partition table */ |
| #define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */ |
| #define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */ |
| #define BLKRASET _IO(0x12,98) /* set read ahead for block device */ |
| #define BLKRAGET _IO(0x12,99) /* get current read ahead setting */ |
| #define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */ |
| #define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */ |
| #define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */ |
| #define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */ |
| #define BLKSSZGET _IO(0x12,104)/* get block device sector size */ |
| #if 0 |
| #define BLKPG _IO(0x12,105)/* See blkpg.h */ |
| |
| /* Some people are morons. Do not use sizeof! */ |
| |
| #define BLKELVGET _IOR(0x12,106,size_t)/* elevator get */ |
| #define BLKELVSET _IOW(0x12,107,size_t)/* elevator set */ |
| /* This was here just to show that the number is taken - |
| probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */ |
| #endif |
| /* A jump here: 108-111 have been used for various private purposes. */ |
| #define BLKBSZGET _IOR(0x12,112,size_t) |
| #define BLKBSZSET _IOW(0x12,113,size_t) |
| #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ |
| #define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup) |
| #define BLKTRACESTART _IO(0x12,116) |
| #define BLKTRACESTOP _IO(0x12,117) |
| #define BLKTRACETEARDOWN _IO(0x12,118) |
| #define BLKDISCARD _IO(0x12,119) |
| #define BLKIOMIN _IO(0x12,120) |
| #define BLKIOOPT _IO(0x12,121) |
| #define BLKALIGNOFF _IO(0x12,122) |
| #define BLKPBSZGET _IO(0x12,123) |
| #define BLKDISCARDZEROES _IO(0x12,124) |
| #define BLKSECDISCARD _IO(0x12,125) |
| #define BLKROTATIONAL _IO(0x12,126) |
| #define BLKZEROOUT _IO(0x12,127) |
| /* |
| * A jump here: 130-131 are reserved for zoned block devices |
| * (see uapi/linux/blkzoned.h) |
| */ |
| |
| #define BMAP_IOCTL 1 /* obsolete - kept for compatibility */ |
| #define FIBMAP _IO(0x00,1) /* bmap access */ |
| #define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */ |
| #define FIFREEZE _IOWR('X', 119, int) /* Freeze */ |
| #define FITHAW _IOWR('X', 120, int) /* Thaw */ |
| #define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */ |
| #define FICLONE _IOW(0x94, 9, int) |
| #define FICLONERANGE _IOW(0x94, 13, struct file_clone_range) |
| #define FIDEDUPERANGE _IOWR(0x94, 54, struct file_dedupe_range) |
| |
| #define FS_IOC_GETFLAGS _IOR('f', 1, long) |
| #define FS_IOC_SETFLAGS _IOW('f', 2, long) |
| #define FS_IOC_GETVERSION _IOR('v', 1, long) |
| #define FS_IOC_SETVERSION _IOW('v', 2, long) |
| #define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap) |
| #define FS_IOC32_GETFLAGS _IOR('f', 1, int) |
| #define FS_IOC32_SETFLAGS _IOW('f', 2, int) |
| #define FS_IOC32_GETVERSION _IOR('v', 1, int) |
| #define FS_IOC32_SETVERSION _IOW('v', 2, int) |
| #define FS_IOC_FSGETXATTR _IOR ('X', 31, struct fsxattr) |
| #define FS_IOC_FSSETXATTR _IOW ('X', 32, struct fsxattr) |
| |
| /* |
| * File system encryption support |
| */ |
| /* Policy provided via an ioctl on the topmost directory */ |
| #define FS_KEY_DESCRIPTOR_SIZE 8 |
| |
| struct fscrypt_policy { |
| __u8 version; |
| __u8 contents_encryption_mode; |
| __u8 filenames_encryption_mode; |
| __u8 flags; |
| __u8 master_key_descriptor[FS_KEY_DESCRIPTOR_SIZE]; |
| } __packed; |
| |
| #define FS_IOC_SET_ENCRYPTION_POLICY _IOR('f', 19, struct fscrypt_policy) |
| #define FS_IOC_GET_ENCRYPTION_PWSALT _IOW('f', 20, __u8[16]) |
| #define FS_IOC_GET_ENCRYPTION_POLICY _IOW('f', 21, struct fscrypt_policy) |
| |
| /* |
| * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS) |
| * |
| * Note: for historical reasons, these flags were originally used and |
| * defined for use by ext2/ext3, and then other file systems started |
| * using these flags so they wouldn't need to write their own version |
| * of chattr/lsattr (which was shipped as part of e2fsprogs). You |
| * should think twice before trying to use these flags in new |
| * contexts, or trying to assign these flags, since they are used both |
| * as the UAPI and the on-disk encoding for ext2/3/4. Also, we are |
| * almost out of 32-bit flags. :-) |
| * |
| * We have recently hoisted FS_IOC_FSGETXATTR / FS_IOC_FSSETXATTR from |
| * XFS to the generic FS level interface. This uses a structure that |
| * has padding and hence has more room to grow, so it may be more |
| * appropriate for many new use cases. |
| * |
| * Please do not change these flags or interfaces before checking with |
| * linux-fsdevel@vger.kernel.org and linux-api@vger.kernel.org. |
| */ |
| #define FS_SECRM_FL 0x00000001 /* Secure deletion */ |
| #define FS_UNRM_FL 0x00000002 /* Undelete */ |
| #define FS_COMPR_FL 0x00000004 /* Compress file */ |
| #define FS_SYNC_FL 0x00000008 /* Synchronous updates */ |
| #define FS_IMMUTABLE_FL 0x00000010 /* Immutable file */ |
| #define FS_APPEND_FL 0x00000020 /* writes to file may only append */ |
| #define FS_NODUMP_FL 0x00000040 /* do not dump file */ |
| #define FS_NOATIME_FL 0x00000080 /* do not update atime */ |
| /* Reserved for compression usage... */ |
| #define FS_DIRTY_FL 0x00000100 |
| #define FS_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ |
| #define FS_NOCOMP_FL 0x00000400 /* Don't compress */ |
| /* End compression flags --- maybe not all used */ |
| #define FS_ENCRYPT_FL 0x00000800 /* Encrypted file */ |
| #define FS_BTREE_FL 0x00001000 /* btree format dir */ |
| #define FS_INDEX_FL 0x00001000 /* hash-indexed directory */ |
| #define FS_IMAGIC_FL 0x00002000 /* AFS directory */ |
| #define FS_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */ |
| #define FS_NOTAIL_FL 0x00008000 /* file tail should not be merged */ |
| #define FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ |
| #define FS_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ |
| #define FS_HUGE_FILE_FL 0x00040000 /* Reserved for ext4 */ |
| #define FS_EXTENT_FL 0x00080000 /* Extents */ |
| #define FS_EA_INODE_FL 0x00200000 /* Inode used for large EA */ |
| #define FS_EOFBLOCKS_FL 0x00400000 /* Reserved for ext4 */ |
| #define FS_NOCOW_FL 0x00800000 /* Do not cow file */ |
| #define FS_INLINE_DATA_FL 0x10000000 /* Reserved for ext4 */ |
| #define FS_PROJINHERIT_FL 0x20000000 /* Create with parents projid */ |
| #define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */ |
| |
| #define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */ |
| #define FS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */ |
| |
| |
| #define SYNC_FILE_RANGE_WAIT_BEFORE 1 |
| #define SYNC_FILE_RANGE_WRITE 2 |
| #define SYNC_FILE_RANGE_WAIT_AFTER 4 |
| |
| /* flags for preadv2/pwritev2: */ |
| #define RWF_HIPRI 0x00000001 /* high priority request, poll if possible */ |
| #define RWF_DSYNC 0x00000002 /* per-IO O_DSYNC */ |
| #define RWF_SYNC 0x00000004 /* per-IO O_SYNC */ |
| |
| #endif /* _UAPI_LINUX_FS_H */ |