Linus Torvalds 57302e0ddf vfs: avoid "attempt to access beyond end of device" warnings ... The block device access simplification that avoided accessing the (racy) block size information (commit bbec0270bd: "blkdev_max_block: make private to fs/buffer.c") no longer checks the maximum block size in the block mapping path. That was _almost_ as simple as just removing the code entirely, because the readers and writers all check the size of the device anyway, so under normal circumstances it "just worked". However, the block size may be such that the end of the device may straddle one single buffer_head. At which point we may still want to access the end of the device, but the buffer we use to access it partially extends past the end. The 'bd_set_size()' function intentionally sets the block size to avoid this, but mounting the device - or setting the block size by hand to some other value - can modify that block size. So instead, teach 'submit_bh()' about the special case of the buffer head straddling the end of the device, and turning such an access into a smaller IO access, avoiding the problem. This, btw, also means that unlike before, we can now access the whole device regardless of device block size setting. So now, even if the device size is only 512-byte aligned, we can read and write even the last sector even when having a much bigger block size for accessing the rest of the device. So with this, we could now get rid of the 'bd_set_size()' block size code entirely - resulting in faster IO for the common case - but that would be a separate patch. Reported-and-tested-by: Romain Francoise <romain@orebokech.com> Reporeted-and-tested-by: Meelis Roos <mroos@linux.ee> Reported-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-12-04 08:25:11 -08:00
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9p
adfs
affs
afs
autofs4
befs
bfs
btrfs
cachefiles
ceph
cifs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-12-01 13:29:55 -08:00
coda
configfs
cramfs
debugfs
devpts
dlm
ecryptfs
efs
exofs
exportfs
ext2
ext3
ext4
fat
freevxfs
fscache
fuse
gfs2
hfs
hfsplus
hostfs
hpfs
hppfs
hugetlbfs
isofs
jbd
jbd2
jffs2
jfs
lockd
logfs
minix
ncpfs
nfs	nfs_lookup_revalidate(): fix a leak	2012-11-29 22:04:36 -05:00
nfs_common
nfsd
nilfs2
nls
notify
ntfs
ocfs2
omfs
openpromfs
proc
pstore
qnx4
qnx6
quota
ramfs
reiserfs
romfs
squashfs
sysfs
sysv
ubifs
udf
ufs
xfs
aio.c
anon_inodes.c
attr.c
bad_inode.c
binfmt_aout.c
binfmt_elf_fdpic.c
binfmt_elf.c
binfmt_em86.c
binfmt_flat.c
binfmt_misc.c
binfmt_script.c
binfmt_som.c
bio-integrity.c
bio.c
block_dev.c	blkdev_max_block: make private to fs/buffer.c	2012-11-29 17:48:12 -08:00
buffer.c	vfs: avoid "attempt to access beyond end of device" warnings	2012-12-04 08:25:11 -08:00
char_dev.c
compat_binfmt_elf.c
compat_ioctl.c
compat.c
coredump.c
coredump.h
dcache.c
dcookies.c
direct-io.c	direct-io: don't read inode->i_blkbits multiple times	2012-11-29 12:38:44 -08:00
drop_caches.c
eventfd.c
eventpoll.c
exec.c
fcntl.c
fhandle.c
fifo.c
file_table.c
file.c	fix off-by-one in argument passed by iterate_fd() to callbacks	2012-11-29 23:01:30 -05:00
filesystems.c
fs_struct.c
fs-writeback.c
generic_acl.c
inode.c
internal.h
ioctl.c
ioprio.c
Kconfig
Kconfig.binfmt
libfs.c
locks.c
Makefile
mbcache.c
mount.h
mpage.c
namei.c	lookup_one_len: don't accept . and ..	2012-11-29 22:17:21 -05:00
namespace.c
no-block.c
open.c
pipe.c
pnode.c
pnode.h
posix_acl.c
proc_namespace.c
read_write.c
read_write.h
readdir.c
select.c
seq_file.c
signalfd.c
splice.c
stack.c
stat.c
statfs.c
super.c
sync.c
timerfd.c
utimes.c
xattr_acl.c
xattr.c