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Al Viro f8ad850f11 try to get rid of races in hostfs open() 
In case of mode mismatch, do *not* blindly close the descriptor
another openers might be using right now.  Open the underlying
file with currently sufficient mode, then
	* if current mode has grown so that it's sufficient for
us now, just close our new fd
	* if current mode has grown and our fd is *not* enough
to cover it, close and repeat.
	* otherwise, install our fd if the file hadn't been
opened at all or dup2() our fd over the current one (and close
our fd).
Critical section is protected by mutex; yes, system-wide.  All
we do under it is a bunch of comparison and maybe an overwriting
dup2() on host.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09 16:48:15 -04:00
..
9p remove inode_setattr 2010-08-09 16:47:37 -04:00
adfs check ATTR_SIZE contraints in inode_change_ok 2010-08-09 16:47:39 -04:00
affs switch affs to ->evict_inode() 2010-08-09 16:48:06 -04:00
afs writeback: remove writeback_inodes_wbc 2010-07-06 08:54:03 +02:00
autofs fs/: do not fallback to default_llseek() when readdir() uses BKL 2010-05-27 09:12:56 -07:00
autofs4 fs/autofs4: use memdup_user 2010-05-27 09:12:41 -07:00
befs include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
bfs switch bfs to ->evict_inode(), clean up 2010-08-09 16:48:04 -04:00
btrfs simplify checks for I_CLEAR/I_FREEING 2010-08-09 16:47:44 -04:00
cachefiles CacheFiles: Fix error handling in cachefiles_determine_cache_security() 2010-05-12 18:23:58 -07:00
ceph ceph: use complete_all and wake_up_all 2010-07-27 13:11:17 -07:00
cifs always call inode_change_ok early in ->setattr 2010-08-09 16:47:38 -04:00
coda drop unused dentry argument to ->fsync 2010-05-27 22:05:02 -04:00
configfs fix setattr error handling in sysfs, configfs 2010-06-04 17:16:29 -04:00
cramfs simplify get_cramfs_inode() 2010-08-09 16:47:51 -04:00
debugfs Add x64 support to debugfs 2010-05-19 22:41:57 -04:00
devpts Simplify devpts_get_sb() failure exits 2010-05-21 18:31:12 -04:00
dlm dlm: fix ast ordering for user locks 2010-04-30 14:52:51 -05:00
ecryptfs check ATTR_SIZE contraints in inode_change_ok 2010-08-09 16:47:39 -04:00
efs
exofs exofs: New truncate sequence 2010-08-09 16:47:41 -04:00
exportfs
ext2 merge ext2 delete_inode and clear_inode, switch to ->evict_inode() 2010-08-09 16:47:57 -04:00
ext3 convert ext3 to ->evict_inode() 2010-08-09 16:48:03 -04:00
ext4 remove inode_setattr 2010-08-09 16:47:37 -04:00
fat covert fatfs to ->evict_inode() 2010-08-09 16:48:01 -04:00
freevxfs fs/: do not fallback to default_llseek() when readdir() uses BKL 2010-05-27 09:12:56 -07:00
fscache FS-Cache: Remove unneeded null checks 2010-06-01 13:32:11 -07:00
fuse check ATTR_SIZE contraints in inode_change_ok 2010-08-09 16:47:39 -04:00
gfs2 simplify checks for I_CLEAR/I_FREEING 2010-08-09 16:47:44 -04:00
hfs get rid of file_fsync() 2010-08-09 16:47:43 -04:00
hfsplus get rid of file_fsync() 2010-08-09 16:47:43 -04:00
hostfs try to get rid of races in hostfs open() 2010-08-09 16:48:15 -04:00
hpfs remove inode_setattr 2010-08-09 16:47:37 -04:00
hppfs missing include in hppfs 2010-08-09 16:47:26 -04:00
hugetlbfs new helper: end_writeback() 2010-08-09 16:47:49 -04:00
isofs fs/: do not fallback to default_llseek() when readdir() uses BKL 2010-05-27 09:12:56 -07:00
jbd ext3: Fix waiting on transaction during fsync 2010-05-21 19:30:41 +02:00
jbd2 jbd2/ocfs2: Fix block checksumming when a buffer is used in several transactions 2010-07-15 15:17:47 -07:00
jffs2 jffs2: don't open-code iget_failed() 2010-08-09 16:47:41 -04:00
jfs remove inode_setattr 2010-08-09 16:47:37 -04:00
lockd include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
logfs always call inode_change_ok early in ->setattr 2010-08-09 16:47:38 -04:00
minix switch minix to ->evict_inode(), fix write_inode/delete_inode race 2010-08-09 16:47:53 -04:00
ncpfs remove inode_setattr 2010-08-09 16:47:37 -04:00
nfs NFS: Fix a typo in include/linux/nfs_fs.h 2010-08-01 15:10:01 -07:00
nfs_common include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
nfsd Merge branch 'for-2.6.35' of git://linux-nfs.org/~bfields/linux 2010-06-09 12:43:04 -07:00
nilfs2 simplify checks for I_CLEAR/I_FREEING 2010-08-09 16:47:44 -04:00
nls
notify simplify checks for I_CLEAR/I_FREEING 2010-08-09 16:47:44 -04:00
ntfs remove inode_setattr 2010-08-09 16:47:37 -04:00
ocfs2 check ATTR_SIZE contraints in inode_change_ok 2010-08-09 16:47:39 -04:00
omfs switch omfs to ->evict_inode() 2010-08-09 16:48:05 -04:00
openpromfs
partitions [S390] dasd: use correct label location for diag fba disks 2010-07-19 09:22:50 +02:00
proc switch procfs to ->evict_inode() 2010-08-09 16:47:52 -04:00
qnx4 get rid of cont_write_begin_newtrunc 2010-08-09 16:47:31 -04:00
quota simplify checks for I_CLEAR/I_FREEING 2010-08-09 16:47:44 -04:00
ramfs check ATTR_SIZE contraints in inode_change_ok 2010-08-09 16:47:39 -04:00
reiserfs always call inode_change_ok early in ->setattr 2010-08-09 16:47:38 -04:00
romfs
smbfs switch smbfs to evict_inode() 2010-08-09 16:48:00 -04:00
squashfs squashfs: fix name reading in squashfs_xattr_get 2010-05-23 08:27:42 +01:00
sysfs switch sysfs to ->evict_inode() 2010-08-09 16:47:53 -04:00
sysv switch sysv to ->evict_inode() 2010-08-09 16:47:59 -04:00
ubifs check ATTR_SIZE contraints in inode_change_ok 2010-08-09 16:47:39 -04:00
udf remove inode_setattr 2010-08-09 16:47:37 -04:00
ufs switch ufs to ->evict_inode() 2010-08-09 16:48:02 -04:00
xfs simplify checks for I_CLEAR/I_FREEING 2010-08-09 16:47:44 -04:00
aio.c get rid of the magic around f_count in aio 2010-05-27 22:03:07 -04:00
anon_inodes.c Revert "anon_inode: set S_IFREG on the anon_inode" 2010-05-27 22:03:05 -04:00
attr.c check ATTR_SIZE contraints in inode_change_ok 2010-08-09 16:47:39 -04:00
bad_inode.c drop unused dentry argument to ->fsync 2010-05-27 22:05:02 -04:00
binfmt_aout.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
binfmt_elf.c coredump: pass mm->flags as a coredump parameter for consistency 2010-03-06 11:26:46 -08:00
binfmt_elf_fdpic.c binfmt_elf_fdpic: Fix clear_user() error handling 2010-06-01 08:11:06 -07:00
binfmt_em86.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
binfmt_flat.c flat: tweak default stack alignment 2010-06-29 15:29:31 -07:00
binfmt_misc.c
binfmt_script.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
binfmt_som.c
bio-integrity.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
bio.c Merge branch 'master' into for-linus 2010-03-19 08:05:10 +01:00
block_dev.c get rid of block_write_begin_newtrunc 2010-08-09 16:47:33 -04:00
buffer.c get rid of block_write_begin_newtrunc 2010-08-09 16:47:33 -04:00
char_dev.c
compat.c fs/compat_rw_copy_check_uvector: add missing compat_ptr call 2010-06-04 15:21:44 -07:00
compat_binfmt_elf.c elf coredump: replace ELF_CORE_EXTRA_* macros by functions 2010-03-06 11:26:45 -08:00
compat_ioctl.c pktcdvd: improve BKL and compat_ioctl.c usage 2010-04-29 08:44:37 -07:00
dcache.c new helper: __dentry_path() 2010-08-09 16:48:13 -04:00
dcookies.c
direct-io.c sort out blockdev_direct_IO variants 2010-08-09 16:47:29 -04:00
drop_caches.c simplify checks for I_CLEAR/I_FREEING 2010-08-09 16:47:44 -04:00
eventfd.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
eventpoll.c sched, wait: Use wrapper functions 2010-05-11 17:43:58 +02:00
exec.c exit: avoid sig->count in de_thread/__exit_signal synchronization 2010-05-27 09:12:46 -07:00
fcntl.c fs/fcntl.c:kill_fasync_rcu() fa_lock must be IRQ-safe 2010-06-29 15:29:32 -07:00
fifo.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
file.c fs: use rlimit helpers 2010-03-06 11:26:29 -08:00
file_table.c get rid of the magic around f_count in aio 2010-05-27 22:03:07 -04:00
filesystems.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
fs-writeback.c simplify checks for I_CLEAR/I_FREEING 2010-08-09 16:47:44 -04:00
fs_struct.c
generic_acl.c fs: xattr_handler table should be const 2010-05-21 18:31:18 -04:00
inode.c new helper: end_writeback() 2010-08-09 16:47:49 -04:00
internal.h Bury __put_super_and_need_restart() 2010-05-21 18:31:16 -04:00
ioctl.c Introduce freeze_super and thaw_super for the fsfreeze ioctl 2010-05-21 18:31:18 -04:00
ioprio.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2010-03-19 09:43:06 -07:00
Kconfig.binfmt
libfs.c check ATTR_SIZE contraints in inode_change_ok 2010-08-09 16:47:39 -04:00
locks.c Merge branch 'for-next' into for-linus 2010-03-08 16:55:37 +01:00
Makefile Take statfs variants to fs/statfs.c 2010-05-21 18:31:17 -04:00
mbcache.c mm: add context argument to shrinker callback 2010-07-19 14:56:17 +10:00
mpage.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
namei.c VFS: fix recent breakage of FS_REVAL_DOT 2010-05-27 22:03:06 -04:00
namespace.c Merge branch 'next' into for-linus 2010-05-18 08:57:00 +10:00
nfsctl.c Switch may_open() and break_lease() to passing O_... 2010-03-03 13:00:21 -05:00
no-block.c
open.c Take statfs variants to fs/statfs.c 2010-05-21 18:31:17 -04:00
pipe.c pipe: fix check in "set size" fcntl 2010-06-10 19:08:34 +02:00
pnode.c Kill CL_PROPAGATION, sanitize fs/pnode.c:get_source() 2010-03-03 13:00:22 -05:00
pnode.h VFS: Clean up shared mount flag propagation 2010-03-03 14:07:55 -05:00
posix_acl.c
read_write.c vfs: introduce noop_llseek() 2010-05-27 09:12:56 -07:00
read_write.h
readdir.c
select.c Add generic sys_old_select() 2010-03-12 15:52:32 -08:00
seq_file.c seq_file: fix new kernel-doc warnings 2010-03-07 15:48:26 -08:00
signalfd.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
splice.c splice: check f_mode for seekable file 2010-06-30 08:12:37 +02:00
stack.c
stat.c
statfs.c Take statfs variants to fs/statfs.c 2010-05-21 18:31:17 -04:00
super.c fs: fix superblock iteration race 2010-06-29 10:38:22 -07:00
sync.c get rid of file_fsync() 2010-08-09 16:47:43 -04:00
timerfd.c fs/timerfd.c: make use of wait_event_interruptible_locked_irq() 2010-05-20 13:21:42 -07:00
utimes.c
xattr.c fs: xattr_handler table should be const 2010-05-21 18:31:18 -04:00
xattr_acl.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00