AcoSail/kernel_optimize_test
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2c58d548f5
kernel_optimize_test/fs/ext4
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Eric Biggers 2c58d548f5 fscrypt: cache decrypted symlink target in ->i_link 
Path lookups that traverse encrypted symlink(s) are very slow because
each encrypted symlink needs to be decrypted each time it's followed.
This also involves dropping out of rcu-walk mode.

Make encrypted symlinks faster by caching the decrypted symlink target
in ->i_link.  The first call to fscrypt_get_symlink() sets it.  Then,
the existing VFS path lookup code uses the non-NULL ->i_link to take the
fast path where ->get_link() isn't called, and lookups in rcu-walk mode
remain in rcu-walk mode.

Also set ->i_link immediately when a new encrypted symlink is created.

To safely free the symlink target after an RCU grace period has elapsed,
introduce a new function fscrypt_free_inode(), and make the relevant
filesystems call it just before actually freeing the inode.

Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-04-17 12:43:29 -04:00
..
acl.c ext4: compare old and new mode before setting update_mode flag 2018-12-10 00:22:38 -05:00
acl.h ext4: fix up remaining files with SPDX cleanups 2017-12-17 22:00:59 -05:00
balloc.c ext4: use ext4_warning() for sb_getblk failure 2018-08-01 12:02:31 -04:00
bitmap.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
block_validity.c ext4: use 'sbi' instead of 'EXT4_SB(sb)' 2018-01-11 13:17:49 -05:00
dir.c fscrypt: remove filesystem specific build config option 2019-01-23 23:56:43 -05:00
ext4_extents.h ext4: adjust reserved cluster count when removing extents 2018-10-01 14:25:08 -04:00
ext4_jbd2.c ext4: shutdown should not prevent get_write_access 2018-02-18 22:07:36 -05:00
ext4_jbd2.h Miscellaneous ext4 bug fixes for 5.1. 2019-03-24 13:41:37 -07:00
ext4.h fscrypt: fix race where ->lookup() marks plaintext dentry as ciphertext 2019-04-17 10:07:51 -04:00
extents_status.c ext4: fix reserved cluster accounting at page invalidation time 2018-10-01 14:33:24 -04:00
extents_status.h ext4: reduce reserved cluster count by number of allocated clusters 2018-10-01 14:24:08 -04:00
extents.c A large number of bug fixes and cleanups. One new feature to allow 2019-03-12 15:03:21 -07:00
file.c ext4: fix data corruption caused by unaligned direct AIO 2019-03-14 23:20:25 -04:00
fsmap.c ext4: make function ‘ext4_getfsmap_find_fixed_metadata’ static 2018-05-10 11:50:04 -04:00
fsmap.h ext4: fix up remaining files with SPDX cleanups 2017-12-17 22:00:59 -05:00
fsync.c Revert "ext4: use ext4_write_inode() when fsyncing w/o a journal" 2019-01-31 23:41:11 -05:00
hash.c ext4: annotate implicit fall throughs 2019-02-21 10:49:53 -05:00
ialloc.c ext4: use IS_ENCRYPTED() to check encryption status 2019-01-23 23:56:43 -05:00
indirect.c ext4: cleanup bh release code in ext4_ind_remove_space() 2019-03-23 11:56:01 -04:00
inline.c ext4: fix a potential fiemap/page fault deadlock w/ inline_data 2018-12-25 00:56:33 -05:00
inode.c Miscellaneous ext4 bug fixes for 5.1. 2019-03-24 13:41:37 -07:00
ioctl.c Miscellaneous ext4 bug fixes for 5.1. 2019-03-24 13:41:37 -07:00
Kconfig A large number of bug fixes and cleanups. One new feature to allow 2019-03-12 15:03:21 -07:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mballoc.c ext4: replace opencoded i_writecount usage with inode_is_open_for_write() 2019-02-10 23:04:16 -05:00
mballoc.h ext4: fix up remaining files with SPDX cleanups 2017-12-17 22:00:59 -05:00
migrate.c ext4: clean up indentation issues, remove extraneous tabs 2018-12-04 00:16:44 -05:00
mmp.c ext4: don't mark mmp buffer head dirty 2018-09-15 17:11:25 -04:00
move_extent.c ext4: use IS_ENCRYPTED() to check encryption status 2019-01-23 23:56:43 -05:00
namei.c fscrypt: fix race where ->lookup() marks plaintext dentry as ciphertext 2019-04-17 10:07:51 -04:00
page-io.c A large number of bug fixes and cleanups. One new feature to allow 2019-03-12 15:03:21 -07:00
readpage.c fscrypt: drop inode argument from fscrypt_get_ctx() 2019-04-16 18:37:25 -04:00
resize.c ext4: report real fs size after failed resize 2019-03-15 00:22:28 -04:00
super.c fscrypt: cache decrypted symlink target in ->i_link 2019-04-17 12:43:29 -04:00
symlink.c ext4: switch to fscrypt_get_symlink() 2018-01-11 22:10:40 -05:00
sysfs.c A large number of bug fixes and cleanups. One new feature to allow 2019-03-12 15:03:21 -07:00
truncate.h ext4: handle layout changes to pinned DAX mappings 2018-07-29 17:00:22 -04:00
xattr_security.c ext4: use XATTR_CREATE in ext4_initxattrs() 2018-05-10 11:52:14 -04:00
xattr_trusted.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xattr_user.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xattr.c ext4: fix some error pointer dereferences 2019-02-21 11:17:34 -05:00
xattr.h ext4: add extra checks to ext4_xattr_block_get() 2018-03-30 20:04:11 -04:00