diff options
Diffstat (limited to 'include/linux/fs.h')
| -rw-r--r-- | include/linux/fs.h | 442 |
1 files changed, 55 insertions, 387 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 65fbf571023f..001c7cff2d48 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1,121 +1,68 @@ #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/linkage.h> +#include <linux/wait.h> +#include <linux/kdev_t.h> +#include <linux/dcache.h> +#include <linux/path.h> +#include <linux/stat.h> +#include <linux/cache.h> +#include <linux/list.h> +#include <linux/radix-tree.h> +#include <linux/rbtree.h> +#include <linux/init.h> +#include <linux/pid.h> +#include <linux/bug.h> +#include <linux/mutex.h> +#include <linux/capability.h> +#include <linux/semaphore.h> +#include <linux/fiemap.h> +#include <linux/rculist_bl.h> +#include <linux/atomic.h> +#include <linux/shrinker.h> +#include <linux/migrate_mode.h> +#include <linux/uidgid.h> +#include <linux/lockdep.h> +#include <linux/percpu-rwsem.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_DATA 3 /* seek to the next data */ -#define SEEK_HOLE 4 /* seek to the next hole */ -#define SEEK_MAX SEEK_HOLE - -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 0x00000001 -#define MAY_WRITE 0x00000002 -#define MAY_READ 0x00000004 -#define MAY_APPEND 0x00000008 -#define MAY_ACCESS 0x00000010 -#define MAY_OPEN 0x00000020 -#define MAY_CHDIR 0x00000040 -/* called from RCU mode, don't block */ -#define MAY_NOT_BLOCK 0x00000080 - -/* - * 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 ((__force fmode_t)0x1) -/* file is open for writing */ -#define FMODE_WRITE ((__force fmode_t)0x2) -/* file is seekable */ -#define FMODE_LSEEK ((__force fmode_t)0x4) -/* file can be accessed using pread */ -#define FMODE_PREAD ((__force fmode_t)0x8) -/* file can be accessed using pwrite */ -#define FMODE_PWRITE ((__force fmode_t)0x10) -/* File is opened for execution with sys_execve / sys_uselib */ -#define FMODE_EXEC ((__force fmode_t)0x20) -/* File is opened with O_NDELAY (only set for block devices) */ -#define FMODE_NDELAY ((__force fmode_t)0x40) -/* File is opened with O_EXCL (only set for block devices) */ -#define FMODE_EXCL ((__force fmode_t)0x80) -/* File is opened using open(.., 3, ..) and is writeable only for ioctls - (specialy hack for floppy.c) */ -#define FMODE_WRITE_IOCTL ((__force fmode_t)0x100) -/* 32bit hashes as llseek() offset (for directories) */ -#define FMODE_32BITHASH ((__force fmode_t)0x200) -/* 64bit hashes as llseek() offset (for directories) */ -#define FMODE_64BITHASH ((__force 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 ((__force fmode_t)0x800) +#include <asm/byteorder.h> +#include <uapi/linux/fs.h> -/* Expect random access pattern */ -#define FMODE_RANDOM ((__force fmode_t)0x1000) +struct export_operations; +struct hd_geometry; +struct iovec; +struct nameidata; +struct kiocb; +struct kobject; +struct pipe_inode_info; +struct poll_table_struct; +struct kstatfs; +struct vm_area_struct; +struct vfsmount; +struct cred; +struct swap_info_struct; -/* File is huge (eg. /dev/kmem): treat loff_t as unsigned */ -#define FMODE_UNSIGNED_OFFSET ((__force fmode_t)0x2000) +extern void __init inode_init(void); +extern void __init inode_init_early(void); +extern void __init files_init(unsigned long); -/* File is opened with O_PATH; almost nothing can be done with it */ -#define FMODE_PATH ((__force fmode_t)0x4000) +extern struct files_stat_struct files_stat; +extern unsigned long get_max_files(void); +extern int sysctl_nr_open; +extern struct inodes_stat_t inodes_stat; +extern int leases_enable, lease_break_time; +extern int sysctl_protected_symlinks; +extern int sysctl_protected_hardlinks; -/* File was opened by fanotify and shouldn't generate fanotify events */ -#define FMODE_NONOTIFY ((__force fmode_t)0x1000000) +struct buffer_head; +typedef int (get_block_t)(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create); +typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset, + ssize_t bytes, void *private, int ret, + bool is_async); /* * The below are the various read and write types that we support. Some of @@ -175,284 +122,6 @@ struct inodes_stat_t { #define WRITE_FUA (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_FUA) #define WRITE_FLUSH_FUA (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_FLUSH | REQ_FUA) - -/* - * Flag for rw_copy_check_uvector and compat_rw_copy_check_uvector - * that indicates that they should check the contents of the iovec are - * valid, but not check the memory that the iovec elements - * points too. - */ -#define CHECK_IOVEC_ONLY -1 - -#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_REVAL_DOT 16384 /* Check the paths ".", ".." for staleness */ -#define FS_RENAME_DOES_D_MOVE 32768 /* FS will handle d_move() - * during rename() internally. - */ - -/* - * 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_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) - -/* - * 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_IMA 1024 /* Inode has an associated IMA struct */ -#define S_AUTOMOUNT 2048 /* Automount/referral quasi-directory */ -#define S_NOSEC 4096 /* no suid or xattr security attributes */ - -/* - * 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_IMA(inode) ((inode)->i_flags & S_IMA) -#define IS_AUTOMOUNT(inode) ((inode)->i_flags & S_AUTOMOUNT) -#define IS_NOSEC(inode) ((inode)->i_flags & S_NOSEC) - -/* 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) - -#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 - -#ifdef __KERNEL__ - -#include <linux/linkage.h> -#include <linux/wait.h> -#include <linux/kdev_t.h> -#include <linux/dcache.h> -#include <linux/path.h> -#include <linux/stat.h> -#include <linux/cache.h> -#include <linux/list.h> -#include <linux/radix-tree.h> -#include <linux/rbtree.h> -#include <linux/init.h> -#include <linux/pid.h> -#include <linux/bug.h> -#include <linux/mutex.h> -#include <linux/capability.h> -#include <linux/semaphore.h> -#include <linux/fiemap.h> -#include <linux/rculist_bl.h> -#include <linux/atomic.h> -#include <linux/shrinker.h> -#include <linux/migrate_mode.h> -#include <linux/uidgid.h> -#include <linux/lockdep.h> -#include <linux/percpu-rwsem.h> - -#include <asm/byteorder.h> - -struct export_operations; -struct hd_geometry; -struct iovec; -struct nameidata; -struct kiocb; -struct kobject; -struct pipe_inode_info; -struct poll_table_struct; -struct kstatfs; -struct vm_area_struct; -struct vfsmount; -struct cred; -struct swap_info_struct; - -extern void __init inode_init(void); -extern void __init inode_init_early(void); -extern void __init files_init(unsigned long); - -extern struct files_stat_struct files_stat; -extern unsigned long get_max_files(void); -extern int sysctl_nr_open; -extern struct inodes_stat_t inodes_stat; -extern int leases_enable, lease_break_time; -extern int sysctl_protected_symlinks; -extern int sysctl_protected_hardlinks; - -struct buffer_head; -typedef int (get_block_t)(struct inode *inode, sector_t iblock, - struct buffer_head *bh_result, int create); -typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset, - ssize_t bytes, void *private, int ret, - bool is_async); - /* * Attribute flags. These should be or-ed together to figure out what * has been changed! @@ -2877,5 +2546,4 @@ static inline void inode_has_no_xattr(struct inode *inode) inode->i_flags |= S_NOSEC; } -#endif /* __KERNEL__ */ #endif /* _LINUX_FS_H */ |