OpenCloudOS-Kernel/fs/overlayfs
Al Viro 6c2d4798a8 new helper: lookup_positive_unlocked()
Most of the callers of lookup_one_len_unlocked() treat negatives are
ERR_PTR(-ENOENT).  Provide a helper that would do just that.  Note
that a pinned positive dentry remains positive - it's ->d_inode is
stable, etc.; a pinned _negative_ dentry can become positive at any
point as long as you are not holding its parent at least shared.
So using lookup_one_len_unlocked() needs to be careful;
lookup_positive_unlocked() is safer and that's what the callers
end up open-coding anyway.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-11-15 13:49:04 -05:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
copy_up.c SPDX update for 5.2-rc6 2019-06-21 09:58:42 -07:00
dir.c SPDX update for 5.2-rc6 2019-06-21 09:58:42 -07:00
export.c ovl: Fix dereferencing possible ERR_PTR() 2019-09-11 16:11:45 +02:00
file.c SPDX update for 5.2-rc6 2019-06-21 09:58:42 -07:00
inode.c ovl: filter of trusted xattr results in audit 2019-09-11 16:11:45 +02:00
namei.c new helper: lookup_positive_unlocked() 2019-11-15 13:49:04 -05:00
overlayfs.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
ovl_entry.h ovl: fix regression caused by overlapping layers detection 2019-07-16 13:23:40 +02:00
readdir.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
super.c ovl: fix regression caused by overlapping layers detection 2019-07-16 13:23:40 +02:00
util.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00