linux/fs/orangefs
Mike Marshall f9bbb68233 orangefs: posix open permission checking...
Orangefs has no open, and orangefs checks file permissions
on each file access. Posix requires that file permissions
be checked on open and nowhere else. Orangefs-through-the-kernel
needs to seem posix compliant.

The VFS opens files, even if the filesystem provides no
method. We can see if a file was successfully opened for
read and or for write by looking at file->f_mode.

When writes are flowing from the page cache, file is no
longer available. We can trust the VFS to have checked
file->f_mode before writing to the page cache.

The mode of a file might change between when it is opened
and IO commences, or it might be created with an arbitrary mode.

We'll make sure we don't hit EACCES during the IO stage by
using UID 0. Some of the time we have access without changing
to UID 0 - how to check?

Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-12-04 08:52:55 -05:00
..
acl.c orangefs: reorganize setattr functions to track attribute changes 2019-05-03 14:32:38 -04:00
dcache.c orangefs: reverse sense of is-inode-stale test in d_revalidate 2018-02-06 16:38:13 -05:00
devorangefs-req.c Merge branch 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2018-06-16 16:21:50 +09:00
dir.c orangefs: stop setting atime on inode dirty 2017-11-13 15:10:11 -05:00
downcall.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
file.c orangefs: posix open permission checking... 2019-12-04 08:52:55 -05:00
inode.c orangefs: posix open permission checking... 2019-12-04 08:52:55 -05:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
namei.c orangefs: Add octal zero prefix 2019-09-12 14:17:16 -04:00
orangefs-bufmap.c mm/gup: change GUP fast to use flags rather than a write 'bool' 2019-05-14 09:47:46 -07:00
orangefs-bufmap.h orangefs: copy Orangefs-sized blocks into the pagecache if possible. 2019-05-03 14:32:39 -04:00
orangefs-cache.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
orangefs-debug.h orangefs: remove unused code 2018-04-03 21:55:28 -04:00
orangefs-debugfs.c orangefs: fix build warning from debugfs cleanup patch 2019-07-04 10:30:33 +02:00
orangefs-debugfs.h orangefs: fix build warning from debugfs cleanup patch 2019-07-04 10:30:33 +02:00
orangefs-dev-proto.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
orangefs-kernel.h orangefs: posix open permission checking... 2019-12-04 08:52:55 -05:00
orangefs-mod.c orangefs: fix build warning from debugfs cleanup patch 2019-07-04 10:30:33 +02:00
orangefs-sysfs.c orangefs: add orangefs_revalidate_mapping 2019-05-03 14:32:39 -04:00
orangefs-sysfs.h Orangefs: change pvfs2 filenames to orangefs 2015-12-04 12:56:14 -05:00
orangefs-utils.c orangefs: skip inode writeout if nothing to write 2019-05-03 14:32:38 -04:00
protocol.h orangefs: specify user pointers when using dev_map_desc and bufmap 2018-06-01 14:51:36 -04:00
super.c Orangefs: This pull request includes one fix and our "Orangefs through 2019-05-09 09:37:25 -07:00
symlink.c orangefs: stop setting atime on inode dirty 2017-11-13 15:10:11 -05:00
upcall.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
waitqueue.c orangefs: service ops done for writeback are not killable 2019-05-03 14:32:38 -04:00
xattr.c orangefs: implement xattr cache 2019-05-03 14:32:37 -04:00