linux/fs/ext2
Al Viro 41080b5a24 nfsd race fixes: ext2
* make ext2_new_inode() put the inode into icache in locked state
* do not unlock until the inode is fully set up; otherwise nfsd
might pick it in half-baked state.
* make sure that ext2_new_inode() does *not* lead to two inodes with the
same inumber hashed at the same time; otherwise a bogus fhandle coming
from nfsd might race with inode creation:

nfsd: iget_locked() creates inode
nfsd: try to read from disk, block on that.
ext2_new_inode(): allocate inode with that inumber
ext2_new_inode(): insert it into icache, set it up and dirty
ext2_write_inode(): get the relevant part of inode table in cache,
set the entry for our inode (and start writing to disk)
nfsd: get CPU again, look into inode table, see nice and sane on-disk
inode, set the in-core inode from it

oops - we have two in-core inodes with the same inumber live in icache,
both used for IO.  Welcome to fs corruption...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-12-31 18:07:43 -05:00
..
acl.c [PATCH] sanitize ->permission() prototype 2008-07-26 20:53:14 -04:00
acl.h [PATCH] sanitize ->permission() prototype 2008-07-26 20:53:14 -04:00
balloc.c CRED: Wrap task credential accesses in the Ext2 filesystem 2008-11-14 10:38:50 +11:00
dir.c [PATCH] get rid of on-stack dentry in ext2_get_parent() 2008-10-23 05:13:09 -04:00
ext2.h [PATCH] get rid of on-stack dentry in ext2_get_parent() 2008-10-23 05:13:09 -04:00
file.c generic block based fiemap implementation 2008-10-03 17:32:43 -04:00
fsync.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
ialloc.c nfsd race fixes: ext2 2008-12-31 18:07:43 -05:00
inode.c ext2: ensure fast symlinks are NUL-terminated 2008-12-31 18:07:39 -05:00
ioctl.c [PATCH] r/o bind mounts: elevate write count for ioctls() 2008-04-19 00:29:24 -04:00
Kconfig fs/Kconfig: move ext2, ext3, ext4, JBD, JBD2 out 2008-10-20 11:43:59 -07:00
Makefile [PATCH] Make EXT2_DEBUG work again 2006-06-25 10:01:12 -07:00
namei.c nfsd race fixes: ext2 2008-12-31 18:07:43 -05:00
super.c vfs: Use const for kernel parser table 2008-10-13 10:10:37 -07:00
symlink.c [PATCH] mark struct inode_operations const 1 2007-02-12 09:48:46 -08:00
xattr_security.c ext2: remove double definitions of xattr macros 2008-07-25 10:53:31 -07:00
xattr_trusted.c ext2: remove double definitions of xattr macros 2008-07-25 10:53:31 -07:00
xattr_user.c ext2: remove double definitions of xattr macros 2008-07-25 10:53:31 -07:00
xattr.c ext2: use ext2_group_first_block_no() 2008-04-28 08:58:43 -07:00
xattr.h Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
xip.c [PATCH] move block_device_operations to blkdev.h 2008-10-21 07:47:20 -04:00
xip.h xip: support non-struct page backed memory 2008-04-28 08:58:23 -07:00