2012-10-13 03:46:48 -06:00
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#ifndef _UAPI_LINUX_FS_H
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#define _UAPI_LINUX_FS_H
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/*
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2016-01-08 14:01:25 -07:00
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* This file has definitions for some important file table structures
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* and constants and structures used by various generic file system
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* ioctl's. Please do not make any changes in this file before
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* sending patches for review to linux-fsdevel@vger.kernel.org and
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* linux-api@vger.kernel.org.
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2012-10-13 03:46:48 -06:00
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*/
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#include <linux/limits.h>
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#include <linux/ioctl.h>
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#include <linux/types.h>
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/*
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* It's silly to have NR_OPEN bigger than NR_FILE, but you can change
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* the file limit at runtime and only root can increase the per-process
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* nr_file rlimit, so it's safe to set up a ridiculously high absolute
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* upper limit on files-per-process.
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*
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* Some programs (notably those using select()) may have to be
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* recompiled to take full advantage of the new limits..
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*/
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/* Fixed constants first: */
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#undef NR_OPEN
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#define INR_OPEN_CUR 1024 /* Initial setting for nfile rlimits */
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#define INR_OPEN_MAX 4096 /* Hard limit for nfile rlimits */
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#define BLOCK_SIZE_BITS 10
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#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
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#define SEEK_SET 0 /* seek relative to beginning of file */
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#define SEEK_CUR 1 /* seek relative to current file position */
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#define SEEK_END 2 /* seek relative to end of file */
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#define SEEK_DATA 3 /* seek to the next data */
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#define SEEK_HOLE 4 /* seek to the next hole */
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#define SEEK_MAX SEEK_HOLE
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2014-04-01 09:08:43 -06:00
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#define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */
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2014-04-01 09:08:43 -06:00
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#define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */
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2014-10-23 16:14:37 -06:00
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#define RENAME_WHITEOUT (1 << 2) /* Whiteout source */
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2014-04-01 09:08:43 -06:00
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2015-12-03 04:59:50 -07:00
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struct file_clone_range {
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__s64 src_fd;
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__u64 src_offset;
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__u64 src_length;
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__u64 dest_offset;
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};
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2012-10-13 03:46:48 -06:00
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struct fstrim_range {
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__u64 start;
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__u64 len;
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__u64 minlen;
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};
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2015-12-19 01:55:59 -07:00
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/* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */
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#define FILE_DEDUPE_RANGE_SAME 0
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#define FILE_DEDUPE_RANGE_DIFFERS 1
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/* from struct btrfs_ioctl_file_extent_same_info */
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struct file_dedupe_range_info {
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__s64 dest_fd; /* in - destination file */
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__u64 dest_offset; /* in - start of extent in destination */
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__u64 bytes_deduped; /* out - total # of bytes we were able
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* to dedupe from this file. */
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/* status of this dedupe operation:
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* < 0 for error
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* == FILE_DEDUPE_RANGE_SAME if dedupe succeeds
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* == FILE_DEDUPE_RANGE_DIFFERS if data differs
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*/
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__s32 status; /* out - see above description */
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__u32 reserved; /* must be zero */
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};
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/* from struct btrfs_ioctl_file_extent_same_args */
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struct file_dedupe_range {
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__u64 src_offset; /* in - start of extent in source */
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__u64 src_length; /* in - length of extent */
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__u16 dest_count; /* in - total elements in info array */
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__u16 reserved1; /* must be zero */
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__u32 reserved2; /* must be zero */
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struct file_dedupe_range_info info[0];
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};
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2012-10-13 03:46:48 -06:00
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/* And dynamically-tunable limits and defaults: */
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struct files_stat_struct {
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unsigned long nr_files; /* read only */
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unsigned long nr_free_files; /* read only */
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unsigned long max_files; /* tunable */
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};
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struct inodes_stat_t {
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fs: bump inode and dentry counters to long
This series reworks our current object cache shrinking infrastructure in
two main ways:
* Noticing that a lot of users copy and paste their own version of LRU
lists for objects, we put some effort in providing a generic version.
It is modeled after the filesystem users: dentries, inodes, and xfs
(for various tasks), but we expect that other users could benefit in
the near future with little or no modification. Let us know if you
have any issues.
* The underlying list_lru being proposed automatically and
transparently keeps the elements in per-node lists, and is able to
manipulate the node lists individually. Given this infrastructure, we
are able to modify the up-to-now hammer called shrink_slab to proceed
with node-reclaim instead of always searching memory from all over like
it has been doing.
Per-node lru lists are also expected to lead to less contention in the lru
locks on multi-node scans, since we are now no longer fighting for a
global lock. The locks usually disappear from the profilers with this
change.
Although we have no official benchmarks for this version - be our guest to
independently evaluate this - earlier versions of this series were
performance tested (details at
http://permalink.gmane.org/gmane.linux.kernel.mm/100537) yielding no
visible performance regressions while yielding a better qualitative
behavior in NUMA machines.
With this infrastructure in place, we can use the list_lru entry point to
provide memcg isolation and per-memcg targeted reclaim. Historically,
those two pieces of work have been posted together. This version presents
only the infrastructure work, deferring the memcg work for a later time,
so we can focus on getting this part tested. You can see more about the
history of such work at http://lwn.net/Articles/552769/
Dave Chinner (18):
dcache: convert dentry_stat.nr_unused to per-cpu counters
dentry: move to per-sb LRU locks
dcache: remove dentries from LRU before putting on dispose list
mm: new shrinker API
shrinker: convert superblock shrinkers to new API
list: add a new LRU list type
inode: convert inode lru list to generic lru list code.
dcache: convert to use new lru list infrastructure
list_lru: per-node list infrastructure
shrinker: add node awareness
fs: convert inode and dentry shrinking to be node aware
xfs: convert buftarg LRU to generic code
xfs: rework buffer dispose list tracking
xfs: convert dquot cache lru to list_lru
fs: convert fs shrinkers to new scan/count API
drivers: convert shrinkers to new count/scan API
shrinker: convert remaining shrinkers to count/scan API
shrinker: Kill old ->shrink API.
Glauber Costa (7):
fs: bump inode and dentry counters to long
super: fix calculation of shrinkable objects for small numbers
list_lru: per-node API
vmscan: per-node deferred work
i915: bail out earlier when shrinker cannot acquire mutex
hugepage: convert huge zero page shrinker to new shrinker API
list_lru: dynamically adjust node arrays
This patch:
There are situations in very large machines in which we can have a large
quantity of dirty inodes, unused dentries, etc. This is particularly true
when umounting a filesystem, where eventually since every live object will
eventually be discarded.
Dave Chinner reported a problem with this while experimenting with the
shrinker revamp patchset. So we believe it is time for a change. This
patch just moves int to longs. Machines where it matters should have a
big long anyway.
Signed-off-by: Glauber Costa <glommer@openvz.org>
Cc: Dave Chinner <dchinner@redhat.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: Arve Hjønnevåg <arve@android.com>
Cc: Carlos Maiolino <cmaiolino@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Dave Chinner <dchinner@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: J. Bruce Fields <bfields@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-08-27 18:17:53 -06:00
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long nr_inodes;
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long nr_unused;
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long dummy[5]; /* padding for sysctl ABI compatibility */
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2012-10-13 03:46:48 -06:00
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};
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#define NR_FILE 8192 /* this can well be larger on a larger system */
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/*
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* These are the fs-independent mount-flags: up to 32 flags are supported
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*/
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#define MS_RDONLY 1 /* Mount read-only */
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#define MS_NOSUID 2 /* Ignore suid and sgid bits */
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#define MS_NODEV 4 /* Disallow access to device special files */
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#define MS_NOEXEC 8 /* Disallow program execution */
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#define MS_SYNCHRONOUS 16 /* Writes are synced at once */
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#define MS_REMOUNT 32 /* Alter flags of a mounted FS */
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#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
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#define MS_DIRSYNC 128 /* Directory modifications are synchronous */
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#define MS_NOATIME 1024 /* Do not update access times. */
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#define MS_NODIRATIME 2048 /* Do not update directory access times */
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#define MS_BIND 4096
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#define MS_MOVE 8192
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#define MS_REC 16384
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#define MS_VERBOSE 32768 /* War is peace. Verbosity is silence.
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MS_VERBOSE is deprecated. */
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#define MS_SILENT 32768
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#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
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#define MS_UNBINDABLE (1<<17) /* change to unbindable */
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#define MS_PRIVATE (1<<18) /* change to private */
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#define MS_SLAVE (1<<19) /* change to slave */
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#define MS_SHARED (1<<20) /* change to shared */
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#define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */
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#define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */
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#define MS_I_VERSION (1<<23) /* Update inode I_version field */
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#define MS_STRICTATIME (1<<24) /* Always perform atime updates */
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2015-02-01 22:37:00 -07:00
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#define MS_LAZYTIME (1<<25) /* Update the on-disk [acm]times lazily */
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2013-02-21 17:42:55 -07:00
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/* These sb flags are internal to the kernel */
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2017-01-31 10:06:16 -07:00
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#define MS_SUBMOUNT (1<<26)
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2016-09-16 04:44:20 -06:00
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#define MS_NOREMOTELOCK (1<<27)
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2012-10-13 03:46:48 -06:00
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#define MS_NOSEC (1<<28)
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#define MS_BORN (1<<29)
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#define MS_ACTIVE (1<<30)
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#define MS_NOUSER (1<<31)
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/*
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* Superblock flags that can be altered by MS_REMOUNT
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*/
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2015-02-01 22:37:00 -07:00
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#define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION|\
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MS_LAZYTIME)
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2012-10-13 03:46:48 -06:00
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/*
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* Old magic mount flag and mask
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*/
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#define MS_MGC_VAL 0xC0ED0000
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#define MS_MGC_MSK 0xffff0000
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2016-01-03 22:44:15 -07:00
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/*
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* Structure for FS_IOC_FSGETXATTR[A] and FS_IOC_FSSETXATTR.
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*/
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struct fsxattr {
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__u32 fsx_xflags; /* xflags field value (get/set) */
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__u32 fsx_extsize; /* extsize field value (get/set)*/
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__u32 fsx_nextents; /* nextents field value (get) */
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__u32 fsx_projid; /* project identifier (get/set) */
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2016-10-03 10:11:13 -06:00
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__u32 fsx_cowextsize; /* CoW extsize field value (get/set)*/
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unsigned char fsx_pad[8];
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2016-01-03 22:44:15 -07:00
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};
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/*
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* Flags for the fsx_xflags field
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*/
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#define FS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */
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#define FS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */
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#define FS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */
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#define FS_XFLAG_APPEND 0x00000010 /* all writes append */
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#define FS_XFLAG_SYNC 0x00000020 /* all writes synchronous */
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#define FS_XFLAG_NOATIME 0x00000040 /* do not update access time */
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#define FS_XFLAG_NODUMP 0x00000080 /* do not include in backups */
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#define FS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */
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#define FS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */
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#define FS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */
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#define FS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */
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#define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */
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#define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */
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#define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */
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2016-01-03 22:44:15 -07:00
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#define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */
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2016-10-03 10:11:13 -06:00
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#define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */
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2016-01-03 22:44:15 -07:00
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#define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */
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2012-10-13 03:46:48 -06:00
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/* the read-only stuff doesn't really belong here, but any other place is
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probably as bad and I don't want to create yet another include file. */
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#define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */
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#define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */
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#define BLKRRPART _IO(0x12,95) /* re-read partition table */
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#define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */
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#define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */
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#define BLKRASET _IO(0x12,98) /* set read ahead for block device */
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#define BLKRAGET _IO(0x12,99) /* get current read ahead setting */
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#define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */
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#define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */
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#define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */
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#define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */
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#define BLKSSZGET _IO(0x12,104)/* get block device sector size */
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#if 0
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#define BLKPG _IO(0x12,105)/* See blkpg.h */
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/* Some people are morons. Do not use sizeof! */
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#define BLKELVGET _IOR(0x12,106,size_t)/* elevator get */
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#define BLKELVSET _IOW(0x12,107,size_t)/* elevator set */
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/* This was here just to show that the number is taken -
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probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */
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#endif
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/* A jump here: 108-111 have been used for various private purposes. */
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#define BLKBSZGET _IOR(0x12,112,size_t)
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#define BLKBSZSET _IOW(0x12,113,size_t)
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#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
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#define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup)
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#define BLKTRACESTART _IO(0x12,116)
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#define BLKTRACESTOP _IO(0x12,117)
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#define BLKTRACETEARDOWN _IO(0x12,118)
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#define BLKDISCARD _IO(0x12,119)
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#define BLKIOMIN _IO(0x12,120)
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#define BLKIOOPT _IO(0x12,121)
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#define BLKALIGNOFF _IO(0x12,122)
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#define BLKPBSZGET _IO(0x12,123)
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#define BLKDISCARDZEROES _IO(0x12,124)
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#define BLKSECDISCARD _IO(0x12,125)
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#define BLKROTATIONAL _IO(0x12,126)
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#define BLKZEROOUT _IO(0x12,127)
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2016-10-18 00:40:35 -06:00
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/*
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* A jump here: 130-131 are reserved for zoned block devices
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* (see uapi/linux/blkzoned.h)
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*/
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2012-10-13 03:46:48 -06:00
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#define BMAP_IOCTL 1 /* obsolete - kept for compatibility */
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#define FIBMAP _IO(0x00,1) /* bmap access */
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#define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */
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#define FIFREEZE _IOWR('X', 119, int) /* Freeze */
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#define FITHAW _IOWR('X', 120, int) /* Thaw */
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#define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */
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2015-12-03 04:59:50 -07:00
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#define FICLONE _IOW(0x94, 9, int)
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#define FICLONERANGE _IOW(0x94, 13, struct file_clone_range)
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2015-12-19 01:55:59 -07:00
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#define FIDEDUPERANGE _IOWR(0x94, 54, struct file_dedupe_range)
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2012-10-13 03:46:48 -06:00
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#define FS_IOC_GETFLAGS _IOR('f', 1, long)
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#define FS_IOC_SETFLAGS _IOW('f', 2, long)
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#define FS_IOC_GETVERSION _IOR('v', 1, long)
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#define FS_IOC_SETVERSION _IOW('v', 2, long)
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#define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap)
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#define FS_IOC32_GETFLAGS _IOR('f', 1, int)
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#define FS_IOC32_SETFLAGS _IOW('f', 2, int)
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#define FS_IOC32_GETVERSION _IOR('v', 1, int)
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#define FS_IOC32_SETVERSION _IOW('v', 2, int)
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2016-01-03 22:44:15 -07:00
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#define FS_IOC_FSGETXATTR _IOR ('X', 31, struct fsxattr)
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#define FS_IOC_FSSETXATTR _IOW ('X', 32, struct fsxattr)
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2012-10-13 03:46:48 -06:00
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|
2015-05-15 17:26:10 -06:00
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/*
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* File system encryption support
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*/
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/* Policy provided via an ioctl on the topmost directory */
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#define FS_KEY_DESCRIPTOR_SIZE 8
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2016-11-26 20:18:59 -07:00
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#define FS_POLICY_FLAGS_PAD_4 0x00
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#define FS_POLICY_FLAGS_PAD_8 0x01
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#define FS_POLICY_FLAGS_PAD_16 0x02
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#define FS_POLICY_FLAGS_PAD_32 0x03
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#define FS_POLICY_FLAGS_PAD_MASK 0x03
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#define FS_POLICY_FLAGS_VALID 0x03
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|
/* Encryption algorithms */
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#define FS_ENCRYPTION_MODE_INVALID 0
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#define FS_ENCRYPTION_MODE_AES_256_XTS 1
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#define FS_ENCRYPTION_MODE_AES_256_GCM 2
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#define FS_ENCRYPTION_MODE_AES_256_CBC 3
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#define FS_ENCRYPTION_MODE_AES_256_CTS 4
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|
2015-05-15 17:26:10 -06:00
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|
|
struct fscrypt_policy {
|
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|
|
__u8 version;
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|
|
__u8 contents_encryption_mode;
|
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|
|
__u8 filenames_encryption_mode;
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|
|
__u8 flags;
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|
|
__u8 master_key_descriptor[FS_KEY_DESCRIPTOR_SIZE];
|
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|
|
} __packed;
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|
|
#define FS_IOC_SET_ENCRYPTION_POLICY _IOR('f', 19, struct fscrypt_policy)
|
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|
|
#define FS_IOC_GET_ENCRYPTION_PWSALT _IOW('f', 20, __u8[16])
|
|
|
|
#define FS_IOC_GET_ENCRYPTION_POLICY _IOW('f', 21, struct fscrypt_policy)
|
|
|
|
|
2012-10-13 03:46:48 -06:00
|
|
|
/*
|
|
|
|
* Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)
|
2016-01-08 14:01:25 -07:00
|
|
|
*
|
|
|
|
* 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.
|
2012-10-13 03:46:48 -06:00
|
|
|
*/
|
|
|
|
#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 */
|
2016-01-08 14:01:25 -07:00
|
|
|
#define FS_ENCRYPT_FL 0x00000800 /* Encrypted file */
|
2012-10-13 03:46:48 -06:00
|
|
|
#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*/
|
2016-01-08 14:01:25 -07:00
|
|
|
#define FS_HUGE_FILE_FL 0x00040000 /* Reserved for ext4 */
|
2012-10-13 03:46:48 -06:00
|
|
|
#define FS_EXTENT_FL 0x00080000 /* Extents */
|
2016-01-08 14:01:25 -07:00
|
|
|
#define FS_EA_INODE_FL 0x00200000 /* Inode used for large EA */
|
|
|
|
#define FS_EOFBLOCKS_FL 0x00400000 /* Reserved for ext4 */
|
2012-10-13 03:46:48 -06:00
|
|
|
#define FS_NOCOW_FL 0x00800000 /* Do not cow file */
|
2016-01-08 14:01:25 -07:00
|
|
|
#define FS_INLINE_DATA_FL 0x10000000 /* Reserved for ext4 */
|
2015-10-17 14:15:18 -06:00
|
|
|
#define FS_PROJINHERIT_FL 0x20000000 /* Create with parents projid */
|
2012-10-13 03:46:48 -06:00
|
|
|
#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
|
|
|
|
|
2016-03-03 08:04:01 -07:00
|
|
|
/* flags for preadv2/pwritev2: */
|
|
|
|
#define RWF_HIPRI 0x00000001 /* high priority request, poll if possible */
|
2016-04-07 09:52:03 -06:00
|
|
|
#define RWF_DSYNC 0x00000002 /* per-IO O_DSYNC */
|
|
|
|
#define RWF_SYNC 0x00000004 /* per-IO O_SYNC */
|
2016-03-03 08:04:01 -07:00
|
|
|
|
2012-10-13 03:46:48 -06:00
|
|
|
#endif /* _UAPI_LINUX_FS_H */
|