Current Path :
/
usr
/
local
/
ssl
/
local
/
ssl
/
include
/
linux
/
Or
Select Your Path :
Upload File :
New :
File
Dir
//usr/local/ssl/local/ssl/include/linux/fs.h
#ifndef _LINUX_FS_H #define _LINUX_FS_H /* * This file has definitions for some important file table * structures etc. */ #include <linux/limits.h> #include <linux/ioctl.h> #include <linux/blk_types.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_MAX SEEK_END struct fstrim_range { __u64 start; __u64 len; __u64 minlen; }; /* 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 { int nr_inodes; int nr_unused; int dummy[5]; /* padding for sysctl ABI compatibility */ }; #define NR_FILE 8192 /* this can well be larger on a larger system */ #define MAY_EXEC 1 #define MAY_WRITE 2 #define MAY_READ 4 #define MAY_APPEND 8 #define MAY_ACCESS 16 #define MAY_OPEN 32 /* * flags in file.f_mode. Note that FMODE_READ and FMODE_WRITE must correspond * to O_WRONLY and O_RDWR via the strange trick in __dentry_open() */ /* file is open for reading */ #define FMODE_READ ((fmode_t)1) /* file is open for writing */ #define FMODE_WRITE ((fmode_t)2) /* file is seekable */ #define FMODE_LSEEK ((fmode_t)4) /* file can be accessed using pread */ #define FMODE_PREAD ((fmode_t)8) /* file can be accessed using pwrite */ #define FMODE_PWRITE ((fmode_t)16) /* File is opened for execution with sys_execve / sys_uselib */ #define FMODE_EXEC ((fmode_t)32) /* File is opened with O_NDELAY (only set for block devices) */ #define FMODE_NDELAY ((fmode_t)64) /* File is opened with O_EXCL (only set for block devices) */ #define FMODE_EXCL ((fmode_t)128) /* File is opened using open(.., 3, ..) and is writeable only for ioctls (specialy hack for floppy.c) */ #define FMODE_WRITE_IOCTL ((fmode_t)256) /* 32bit hashes as llseek() offset (for directories) */ #define FMODE_32BITHASH ((fmode_t)0x200) /* 64bit hashes as llseek() offset (for directories) */ #define FMODE_64BITHASH ((fmode_t)0x400) /* * Don't update ctime and mtime. * * Currently a special hack for the XFS open_by_handle ioctl, but we'll * hopefully graduate it to a proper O_CMTIME flag supported by open(2) soon. */ #define FMODE_NOCMTIME ((fmode_t)2048) /* Expect random access pattern */ #define FMODE_RANDOM ((fmode_t)4096) /* File needs atomic accesses to f_pos */ #define FMODE_ATOMIC_POS ((fmode_t)0x8000) /* * The below are the various read and write types that we support. Some of * them include behavioral modifiers that send information down to the * block layer and IO scheduler. Terminology: * * The block layer uses device plugging to defer IO a little bit, in * the hope that we will see more IO very shortly. This increases * coalescing of adjacent IO and thus reduces the number of IOs we * have to send to the device. It also allows for better queuing, * if the IO isn't mergeable. If the caller is going to be waiting * for the IO, then he must ensure that the device is unplugged so * that the IO is dispatched to the driver. * * All IO is handled async in Linux. This is fine for background * writes, but for reads or writes that someone waits for completion * on, we want to notify the block layer and IO scheduler so that they * know about it. That allows them to make better scheduling * decisions. So when the below references 'sync' and 'async', it * is referencing this priority hint. * * With that in mind, the available types are: * * READ A normal read operation. Device will be plugged. * READ_SYNC A synchronous read. Device is not plugged, caller can * immediately wait on this read without caring about * unplugging. * READA Used for read-ahead operations. Lower priority, and the * block layer could (in theory) choose to ignore this * request if it runs into resource problems. * WRITE A normal async write. Device will be plugged. * SWRITE DEPRECATED; use write_dirty_buffer instead. * Like WRITE, but a special case for ll_rw_block() that * tells it to lock the buffer first. Normally a buffer * must be locked before doing IO. * WRITE_SYNC_PLUG Synchronous write. Identical to WRITE, but passes down * the hint that someone will be waiting on this IO * shortly. The device must still be unplugged explicitly, * WRITE_SYNC_PLUG does not do this as we could be * submitting more writes before we actually wait on any * of them. * WRITE_SYNC Like WRITE_SYNC_PLUG, but also unplugs the device * immediately after submission. The write equivalent * of READ_SYNC. * WRITE_ODIRECT_PLUG Special case write for O_DIRECT only. * SWRITE_SYNC * SWRITE_SYNC_PLUG DEPRECATED. Like WRITE_SYNC/WRITE_SYNC_PLUG, but locks * the buffer. See SWRITE. * WRITE_BARRIER DEPRECATED. Always fails. Use FLUSH/FUA instead. * WRITE_FLUSH Like WRITE_SYNC but with preceding cache flush. * WRITE_FUA Like WRITE_SYNC but data is guaranteed to be on * non-volatile media on completion. * WRITE_FLUSH_FUA Combination of WRITE_FLUSH and FUA. The IO is preceded * by a cache flush and data is guaranteed to be on * non-volatile media on completion. * */ #define RW_MASK REQ_WRITE #define RWA_MASK (1 << BIO_RW_AHEAD) #define READ 0 #define WRITE 1 #define READA RWA_MASK #define SWRITE (WRITE | READA) #define READ_SYNC (READ | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG)) #define READ_META (READ | (1 << BIO_RW_META)) #define WRITE_SYNC_PLUG (WRITE | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_NOIDLE)) #define WRITE_SYNC (WRITE_SYNC_PLUG | (1 << BIO_RW_UNPLUG)) #define WRITE_ODIRECT_PLUG (WRITE | (1 << BIO_RW_SYNCIO)) #define WRITE_META (WRITE | (1 << BIO_RW_META)) #define SWRITE_SYNC_PLUG \ (SWRITE | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_NOIDLE)) #define SWRITE_SYNC (SWRITE_SYNC_PLUG | (1 << BIO_RW_UNPLUG)) #define WRITE_BARRIER (WRITE_SYNC | (1 << BIO_RW_BARRIER)) #define WRITE_FLUSH (WRITE_SYNC | (1 << BIO_RW_FLUSH)) #define WRITE_FUA (WRITE_SYNC | (1 << BIO_RW_FUA)) #define WRITE_FLUSH_FUA (WRITE_FLUSH | WRITE_FUA) /* * These aren't really reads or writes, they pass down information about * parts of device that are now unused by the file system. * DEPRECATED but preserved for compatibility. */ #define DISCARD_NOBARRIER (WRITE | (1 << BIO_RW_DISCARD)) #define DISCARD_BARRIER (DISCARD_NOBARRIER | (1 << BIO_RW_BARRIER)) #define SEL_IN 1 #define SEL_OUT 2 #define SEL_EX 4 /* public flags for file_system_type */ #define FS_REQUIRES_DEV 1 #define FS_BINARY_MOUNTDATA 2 #define FS_HAS_SUBTYPE 4 #define FS_HAS_NEW_FREEZE 512 /* new freeze mechanism */ #define FS_REVAL_DOT 16384 /* Check the paths ".", ".." for staleness */ #define FS_RENAME_DOES_D_MOVE 32768 /* FS will handle d_move() * during rename() internally. */ #define FS_HANDLE_QUOTA (1<<16) /* FS handle quota disable/enable */ #define FS_WEAK_REVALIDATE (1<<17) /* FS has d_op->d_weak_revalidate. Must also have FS_REVAL_DOT set! */ /* * the fs is built with the new s_writers member in the superblock * and uses all of that associated infrastructure */ #define sb_has_new_freeze(sb) ((sb)->s_type->fs_flags & FS_HAS_NEW_FREEZE) /* * 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_SNAP_STABLE (1<<27) /* Snapshot pages during writeback, if needed */ #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) /* * Old magic mount flag and mask */ #define MS_MGC_VAL 0xC0ED0000 #define MS_MGC_MSK 0xffff0000 /* Inode flags - they have nothing to superblock flags now */ #define S_SYNC 1 /* Writes are synced at once */ #define S_NOATIME 2 /* Do not update access times */ #define S_APPEND 4 /* Append-only file */ #define S_IMMUTABLE 8 /* Immutable file */ #define S_DEAD 16 /* removed, but still open directory */ #define S_NOQUOTA 32 /* Inode is not counted to quota */ #define S_DIRSYNC 64 /* Directory modifications are synchronous */ #define S_NOCMTIME 128 /* Do not update file c/mtime */ #define S_SWAPFILE 256 /* Do not truncate: swapon got its bmaps */ #define S_PRIVATE 512 /* Inode is fs-internal */ #define S_AUTOMOUNT 2048 /* Automount/referral quasi-directory */ #define S_AOP_EXT 16384 /* fs supports extended aops */ /* * Note that nosuid etc flags are inode-specific: setting some file-system * flags just means all the inodes inherit those flags by default. It might be * possible to override it selectively if you really wanted to with some * ioctl() that is not currently implemented. * * Exception: MS_RDONLY is always applied to the entire file system. * * Unfortunately, it is possible to change a filesystems flags with it mounted * with files in use. This means that all of the inodes will not have their * i_flags updated. Hence, i_flags no longer inherit the superblock mount * flags, so these have to be checked separately. -- rmk@arm.uk.linux.org */ #define __IS_FLG(inode,flg) ((inode)->i_sb->s_flags & (flg)) #define IS_RDONLY(inode) ((inode)->i_sb->s_flags & MS_RDONLY) #define IS_SYNC(inode) (__IS_FLG(inode, MS_SYNCHRONOUS) || \ ((inode)->i_flags & S_SYNC)) #define IS_DIRSYNC(inode) (__IS_FLG(inode, MS_SYNCHRONOUS|MS_DIRSYNC) || \ ((inode)->i_flags & (S_SYNC|S_DIRSYNC))) #define IS_MANDLOCK(inode) __IS_FLG(inode, MS_MANDLOCK) #define IS_NOATIME(inode) __IS_FLG(inode, MS_RDONLY|MS_NOATIME) #define IS_I_VERSION(inode) __IS_FLG(inode, MS_I_VERSION) #define IS_NOQUOTA(inode) ((inode)->i_flags & S_NOQUOTA) #define IS_APPEND(inode) ((inode)->i_flags & S_APPEND) #define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE) #define IS_POSIXACL(inode) __IS_FLG(inode, MS_POSIXACL) #define IS_DEADDIR(inode) ((inode)->i_flags & S_DEAD) #define IS_NOCMTIME(inode) ((inode)->i_flags & S_NOCMTIME) #define IS_SWAPFILE(inode) ((inode)->i_flags & S_SWAPFILE) #define IS_PRIVATE(inode) ((inode)->i_flags & S_PRIVATE) #define IS_AUTOMOUNT(inode) ((inode)->i_flags & S_AUTOMOUNT) #define IS_AOP_EXT(inode) ((inode)->i_flags & S_AOP_EXT) /* 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 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 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) /* * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS) */ #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 */ #define FS_ECOMPR_FL 0x00000800 /* Compression error */ /* End compression flags --- maybe not all used */ #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_EXTENT_FL 0x00080000 /* Extents */ #define FS_DIRECTIO_FL 0x00100000 /* Use direct i/o */ #define FS_NOCOW_FL 0x00800000 /* Do not cow file */ #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 #endif /* _LINUX_FS_H */
