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Gabriel Krisman Bertazi c83ad55eaa ext4: include charset encoding information in the superblock 
Support for encoding is considered an incompatible feature, since it has
potential to create collisions of file names in existing filesystems.
If the feature flag is not enabled, the entire filesystem will operate
on opaque byte sequences, respecting the original behavior.

The s_encoding field stores a magic number indicating the encoding
format and version used globally by file and directory names in the
filesystem.  The s_encoding_flags defines policies for using the charset
encoding, like how to handle invalid sequences.  The magic number is
mapped to the exact charset table, but the mapping is specific to ext4.
Since we don't have any commitment to support old encodings, the only
encoding I am supporting right now is utf8-12.1.0.

The current implementation prevents the user from enabling encoding and
per-directory encryption on the same filesystem at the same time.  The
incompatibility between these features lies in how we do efficient
directory searches when we cannot be sure the encryption of the user
provided fname will match the actual hash stored in the disk without
decrypting every directory entry, because of normalization cases.  My
quickest solution is to simply block the concurrent use of these
features for now, and enable it later, once we have a better solution.

Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.co.uk>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-04-25 14:05:42 -04:00
..
9p Pull request for inlusion in 5.1 2019-03-17 09:10:56 -07:00
adfs
affs
afs afs: Fix StoreData op marshalling 2019-03-28 08:54:20 -07:00
autofs autofs: clear O_NONBLOCK on the pipe 2019-03-07 18:32:01 -08:00
befs
bfs bfs: extra sanity checking and static inode bitmap 2019-01-04 13:13:47 -08:00
btrfs for-5.1-rc2-tag 2019-03-26 10:32:13 -07:00
cachefiles
ceph ceph: fix use-after-free on symlink traversal 2019-03-27 19:00:37 +01:00
cifs cifs: update internal module version number 2019-03-22 22:43:04 -05:00
coda
configfs
cramfs
crypto fscrypt updates for v5.1 2019-03-09 10:54:24 -08:00
debugfs Merge 5.0-rc6 into driver-core-next 2019-02-11 09:09:02 +01:00
devpts fs/devpts: always delete dcache dentry-s in dput() 2019-01-24 13:38:30 -05:00
dlm socket: Rename SO_RCVTIMEO/ SO_SNDTIMEO with _OLD suffixes 2019-02-03 11:17:31 -08:00
ecryptfs crypto: clarify name of WEAK_KEY request flag 2019-01-25 18:41:52 +08:00
efivarfs
efs
exportfs
ext2 \n 2019-03-07 09:01:33 -08:00
ext4 ext4: include charset encoding information in the superblock 2019-04-25 14:05:42 -04:00
f2fs f2fs-for-5.1-rc1 2019-03-15 13:42:53 -07:00
fat fat: enable .splice_write to support splice on O_DIRECT file 2019-03-07 18:32:01 -08:00
freevxfs
fscache
fuse fuse update for 5.1 2019-03-12 14:46:26 -07:00
gfs2 We've only got three patches ready for this merge window: 2019-03-09 11:52:11 -08:00
hfs
hfsplus hfsplus: return file attributes on statx 2019-01-04 13:13:47 -08:00
hostfs
hpfs hpfs: fix spelling mistake "partion" -> "partition" 2019-03-12 09:58:03 -07:00
hugetlbfs Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-03-12 14:08:19 -07:00
isofs
jbd2 jbd2: check superblock mapped prior to committing 2019-04-06 18:57:40 -04:00
jffs2
jfs
kernfs Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-03-12 14:08:19 -07:00
lockd NFS: fix mount/umount race in nlmclnt. 2019-03-18 22:39:34 -04:00
minix
nfs pNFS/flexfiles: Fix layoutstats handling during read failovers 2019-03-23 12:03:58 -04:00
nfs_common
nfsd Miscellaneous NFS server fixes. Probably the most visible bug is one 2019-03-12 15:06:54 -07:00
nilfs2 XArray: Change xa_insert to return -EBUSY 2019-02-06 13:12:15 -05:00
nls
notify fanotify: Allow copying of file handle to userspace 2019-03-19 09:29:07 +01:00
ntfs mm: convert totalram_pages and totalhigh_pages variables to atomic 2018-12-28 12:11:47 -08:00
ocfs2 ocfs2: fix inode bh swapping mixup in ocfs2_reflink_inodes_lock 2019-03-29 10:01:37 -07:00
omfs
openpromfs
orangefs Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-03-12 13:27:20 -07:00
overlayfs ovl: Do not lose security.capability xattr over metadata file copy-up 2019-02-13 11:14:46 +01:00
proc fs/proc/proc_sysctl.c: fix NULL pointer dereference in put_links 2019-03-29 10:01:38 -07:00
pstore pstore/ram: Avoid needless alloc during header write 2019-02-12 13:45:53 -08:00
qnx4
qnx6
quota quota: Lock s_umount in exclusive mode for Q_XQUOTA{ON,OFF} quotactls. 2018-12-18 18:29:15 +01:00
ramfs
reiserfs
romfs
squashfs
sysfs Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-03-16 10:31:02 -07:00
sysv
tracefs
ubifs This pull request contains updates for both UBI and UBIFS: 2019-03-13 09:34:35 -07:00
udf udf: Propagate errors from udf_truncate_extents() 2019-03-18 16:30:02 +01:00
ufs
unicode unicode: update unicode database unicode version 12.1.0 2019-04-25 13:59:17 -04:00
xfs xfs: serialize unaligned dio writes against all other dio writes 2019-03-26 08:37:55 -07:00
aio.c Merge branch 'timers-2038-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-03-05 14:08:26 -08:00
anon_inodes.c
attr.c
bad_inode.c
binfmt_aout.c a.out: remove core dumping support 2019-03-05 10:00:35 -08:00
binfmt_elf.c fs/binfmt_elf.c: spread const a little 2019-03-07 18:32:01 -08:00
binfmt_elf_fdpic.c
binfmt_em86.c
binfmt_flat.c
binfmt_misc.c
binfmt_script.c exec: load_script: Do not exec truncated interpreter path 2019-02-18 16:49:36 -08:00
block_dev.c block: add BIO_NO_PAGE_REF flag 2019-03-18 10:44:48 -06:00
buffer.c fs: fix guard_bio_eod to check for real EOD errors 2019-02-28 13:59:41 -07:00
char_dev.c
compat.c
compat_binfmt_elf.c
compat_ioctl.c
coredump.c
d_path.c
dax.c dax: Flush partial PMDs correctly 2019-03-01 17:24:48 -08:00
dcache.c fs/dcache: Track & report number of negative dentries 2019-01-30 11:02:11 -08:00
dcookies.c
direct-io.c block: allow bio_for_each_segment_all() to iterate over multi-page bvec 2019-02-15 08:40:11 -07:00
drop_caches.c fs/drop_caches.c: avoid softlockups in drop_pagecache_sb() 2019-02-01 15:46:24 -08:00
eventfd.c
eventpoll.c epoll: use rwlock in order to reduce ep_poll_callback() contention 2019-03-07 18:32:01 -08:00
exec.c exec: increase BINPRM_BUF_SIZE to 256 2019-03-07 18:32:01 -08:00
fcntl.c
fhandle.c
file.c io_uring-2019-03-06 2019-03-08 14:48:40 -08:00
file_table.c fs: add fget_many() and fput_many() 2019-02-28 08:24:23 -07:00
filesystems.c vfs: Implement a filesystem superblock creation/configuration context 2019-02-28 03:29:26 -05:00
fs-writeback.c writeback: synchronize sync(2) against cgroup writeback membership switches 2019-01-22 14:39:38 -07:00
fs_context.c vfs: Implement logging through fs_context 2019-02-28 03:29:37 -05:00
fs_parser.c fs: fs_parser: fix printk format warning 2019-03-29 10:01:38 -07:00
fs_pin.c
fs_struct.c
fs_types.c fs: common implementation of file type 2019-01-21 17:48:13 +01:00
inode.c fs/inode.c: inode_set_flags(): replace opencoded set_mask_bits() 2019-03-05 21:07:13 -08:00
internal.h vfs: Add configuration parser helpers 2019-02-28 03:28:53 -05:00
io_uring.c io_uring: offload write to async worker in case of -EAGAIN 2019-03-25 13:13:21 -06:00
ioctl.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
iomap.c block: add BIO_NO_PAGE_REF flag 2019-03-18 10:44:48 -06:00
Kconfig unicode: introduce UTF-8 character database 2019-04-25 13:38:44 -04:00
Kconfig.binfmt
libfs.c
locks.c locks: wake any locks blocked on request before deadlock check 2019-03-25 08:36:24 -04:00
Makefile unicode: introduce UTF-8 character database 2019-04-25 13:38:44 -04:00
mbcache.c
mount.h saner handling of temporary namespaces 2019-01-30 17:44:07 -05:00
mpage.c block: allow bio_for_each_segment_all() to iterate over multi-page bvec 2019-02-15 08:40:11 -07:00
namei.c Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-03-12 14:08:19 -07:00
namespace.c Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-03-12 14:08:19 -07:00
no-block.c
nsfs.c
open.c fs/open.c: allow opening only regular files during execve() 2019-03-29 10:01:37 -07:00
pipe.c Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-03-12 13:27:20 -07:00
pnode.c separate copying and locking mount tree on cross-userns copies 2019-01-30 17:14:50 -05:00
pnode.h separate copying and locking mount tree on cross-userns copies 2019-01-30 17:14:50 -05:00
posix_acl.c
proc_namespace.c
read_write.c Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-03-12 13:27:20 -07:00
readdir.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
select.c y2038: syscalls: rename y2038 compat syscalls 2019-02-07 00:13:27 +01:00
seq_file.c
signalfd.c
splice.c Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-03-12 13:27:20 -07:00
stack.c
stat.c fs: move generic stat response attr handling to vfs_getattr_nosec 2019-02-01 01:55:45 -05:00
statfs.c vfs: add vfs_get_fsid() helper 2019-02-07 16:38:35 +01:00
super.c vfs: Add some logging to the core users of the fs_context log 2019-02-28 03:29:38 -05:00
sync.c
timerfd.c y2038: syscalls: rename y2038 compat syscalls 2019-02-07 00:13:27 +01:00
userfaultfd.c userfaultfd: clear flag if remap event not enabled 2018-12-28 12:11:51 -08:00
utimes.c y2038: syscalls: rename y2038 compat syscalls 2019-02-07 00:13:27 +01:00
xattr.c