linux-toradex.git/fs/ext4/xattr.h, branch v4.4.16 Linux kernel for Apalis and Colibri modules ext4 crypto: add encryption xattr support 2015-04-11T11:47:00+00:00 Michael Halcrow mhalcrow@google.com 2015-04-11T11:47:00+00:00 887e2c452255fbfdc8bdb891ff2066fb26908466 Signed-off-by: Michael Halcrow <mhalcrow@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> 
Signed-off-by: Michael Halcrow <mhalcrow@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
ext4: each filesystem creates and uses its own mb_cache 2014-03-18T23:24:49+00:00 T Makphaibulchoke tmac@hp.com 2014-03-18T23:24:49+00:00 9c191f701ce9f9bc604e88a5dc69cd943daa5d3b This patch adds new interfaces to create and destory cache, ext4_xattr_create_cache() and ext4_xattr_destroy_cache(), and remove the cache creation and destory calls from ex4_init_xattr() and ext4_exitxattr() in fs/ext4/xattr.c. fs/ext4/super.c has been changed so that when a filesystem is mounted a cache is allocated and attched to its ext4_sb_info structure. fs/mbcache.c has been changed so that only one slab allocator is allocated and used by all mbcache structures. Signed-off-by: T. Makphaibulchoke <tmac@hp.com> 
This patch adds new interfaces to create and destory cache,
ext4_xattr_create_cache() and ext4_xattr_destroy_cache(), and remove
the cache creation and destory calls from ex4_init_xattr() and
ext4_exitxattr() in fs/ext4/xattr.c.

fs/ext4/super.c has been changed so that when a filesystem is mounted
a cache is allocated and attched to its ext4_sb_info structure.

fs/mbcache.c has been changed so that only one slab allocator is
allocated and used by all mbcache structures.

Signed-off-by: T. Makphaibulchoke <tmac@hp.com>
ext2/3/4: use generic posix ACL infrastructure 2014-01-26T04:58:19+00:00 Christoph Hellwig hch@infradead.org 2013-12-20T13:16:44+00:00 64e178a7118b1cf7648391755e44dcc209091003 Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
ext4: reserve xattr index for Rich ACL support 2013-04-18T18:53:15+00:00 Theodore Ts'o tytso@mit.edu 2013-04-18T18:53:15+00:00 fd03d8daf417fffbcb27fdb30d60f6c81ed813c8 Jan Kara <jack@suse.cz> SUSE is carrying out of tree patches for Rich ACL support for ext4 as they didn't get upstream due to opposition of some VFS maintainers. Reserve xattr index for Rich ACLs so that it cannot be taken by anything else which would force users to backup and reset their Rich ACLs on files. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> 
Jan Kara <jack@suse.cz>

SUSE is carrying out of tree patches for Rich ACL support for ext4 as
they didn't get upstream due to opposition of some VFS maintainers.
Reserve xattr index for Rich ACLs so that it cannot be taken by
anything else which would force users to backup and reset their Rich
ACLs on files.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
ext4: fix the number of credits needed for acl ops with inline data 2013-02-09T20:23:03+00:00 Theodore Ts'o tytso@mit.edu 2013-02-09T20:23:03+00:00 95eaefbdececae5e781d76d03fe7472a857c8c7a Operations which modify extended attributes may need extra journal credits if inline data is used, since there is a chance that some extended attributes may need to get pushed to an external attribute block. Changes to reflect this was made in xattr.c, but they were missed in fs/ext4/acl.c. To fix this, abstract the calculation of the number of credits needed for xattr operations to an inline function defined in ext4_jbd2.h, and use it in acl.c and xattr.c. Also move the function declarations used in inline.c from xattr.h (where they are non-obviously hidden, and caused problems since ext4_jbd2.h needs to use the function ext4_has_inline_data), and move them to ext4.h. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reviewed-by: Tao Ma <boyu.mt@taobao.com> Reviewed-by: Jan Kara <jack@suse.cz> 
Operations which modify extended attributes may need extra journal
credits if inline data is used, since there is a chance that some
extended attributes may need to get pushed to an external attribute
block.

Changes to reflect this was made in xattr.c, but they were missed in
fs/ext4/acl.c.  To fix this, abstract the calculation of the number of
credits needed for xattr operations to an inline function defined in
ext4_jbd2.h, and use it in acl.c and xattr.c.

Also move the function declarations used in inline.c from xattr.h
(where they are non-obviously hidden, and caused problems since
ext4_jbd2.h needs to use the function ext4_has_inline_data), and move
them to ext4.h.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Tao Ma <boyu.mt@taobao.com>
Reviewed-by: Jan Kara <jack@suse.cz>
ext4: zero out inline data using memset() instead of empty_zero_page 2012-12-11T08:31:49+00:00 Theodore Ts'o tytso@mit.edu 2012-12-11T08:31:49+00:00 bd9926e80330d43f15b710c2935fa41b792d56fd Not all architectures (in particular, sparc64) have empty_zero_page. So instead of copying from empty_zero_page, use memset to clear the inline data by signalling to ext4_xattr_set_entry() via a magic pointer value, EXT4_ZERO_ATTR_VALUE, which is defined by casting -1 to a pointer. This fixes a build failure on sparc64, and the memset() should be more efficient than using memcpy() anyway. Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> 
Not all architectures (in particular, sparc64) have empty_zero_page.
So instead of copying from empty_zero_page, use memset to clear the
inline data by signalling to ext4_xattr_set_entry() via a magic
pointer value, EXT4_ZERO_ATTR_VALUE, which is defined by casting -1 to
a pointer.

This fixes a build failure on sparc64, and the memset() should be more
efficient than using memcpy() anyway.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
ext4: Remove CONFIG_EXT4_FS_XATTR 2012-12-10T21:30:43+00:00 Tao Ma boyu.mt@taobao.com 2012-12-10T21:30:43+00:00 939da1084458246d2e29dd921c2012c177000e96 Ted has sent out a RFC about removing this feature. Eric and Jan confirmed that both RedHat and SUSE enable this feature in all their product. David also said that "As far as I know, it's enabled in all Android kernels that use ext4." So it seems OK for us. And what's more, as inline data depends its implementation on xattr, and to be frank, I don't run any test again inline data enabled while xattr disabled. So I think we should add inline data and remove this config option in the same release. [ The savings if you disable CONFIG_EXT4_FS_XATTR is only 27k, which isn't much in the grand scheme of things. Since no one seems to be testing this configuration except for some automated compile farms, on balance we are better removing this config option, and so that it is effectively always enabled. -- tytso ] Cc: David Brown <davidb@codeaurora.org> Cc: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> 
Ted has sent out a RFC about removing this feature. Eric and Jan
confirmed that both RedHat and SUSE enable this feature in all their
product.  David also said that "As far as I know, it's enabled in all
Android kernels that use ext4."  So it seems OK for us.

And what's more, as inline data depends its implementation on xattr,
and to be frank, I don't run any test again inline data enabled while
xattr disabled.  So I think we should add inline data and remove this
config option in the same release.

[ The savings if you disable CONFIG_EXT4_FS_XATTR is only 27k, which
  isn't much in the grand scheme of things.  Since no one seems to be
  testing this configuration except for some automated compile farms, on
  balance we are better removing this config option, and so that it is
  effectively always enabled. -- tytso ]

Cc: David Brown <davidb@codeaurora.org>
Cc: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
ext4: let fallocate handle inline data correctly 2012-12-10T19:06:03+00:00 Tao Ma boyu.mt@taobao.com 2012-12-10T19:06:03+00:00 0c8d414f163f5d35e43a4de7a6e5ee8c253fcccf If we are punching hole in a file, we will return ENOTSUPP. As for the fallocation of some extents, we will convert the inline data to a normal extent based file first. Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> 
If we are punching hole in a file, we will return ENOTSUPP.
As for the fallocation of some extents, we will convert the
inline data to a normal extent based file first.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
ext4: let ext4_truncate handle inline data correctly 2012-12-10T19:06:02+00:00 Tao Ma boyu.mt@taobao.com 2012-12-10T19:06:02+00:00 aef1c8513c1f8ae076e22ea2a57eff5835578e75 Signed-off-by: Robin Dong <sanbai@taobao.com> Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> 
Signed-off-by: Robin Dong <sanbai@taobao.com>
Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
ext4: evict inline data out if we need to strore xattr in inode 2012-12-10T19:06:02+00:00 Tao Ma boyu.mt@taobao.com 2012-12-10T19:06:02+00:00 0d812f77b36c16dff692390508155de2c7f95ea3 Now we that store data in the inode, in case we need to store some xattrs and inode doesn't have enough space, Andreas suggested that we should keep the xattr(metadata) in and data should be pushed out. So this patch does the work. Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> 
Now we that store data in the inode, in case we need to store some
xattrs and inode doesn't have enough space, Andreas suggested that we
should keep the xattr(metadata) in and data should be pushed out.  So
this patch does the work.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>