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b383a73f2b
linux/fs/ext4
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Ira Weiny b383a73f2b fs/ext4: Introduce DAX inode flag 
Add a flag ([EXT4|FS]_DAX_FL) to preserve FS_XFLAG_DAX in the ext4
inode.

Set the flag to be user visible and changeable.  Set the flag to be
inherited.  Allow applications to change the flag at any time except if
it conflicts with the set of mutually exclusive flags (Currently VERITY,
ENCRYPT, JOURNAL_DATA).

Furthermore, restrict setting any of the exclusive flags if DAX is set.

While conceptually possible, we do not allow setting EXT4_DAX_FL while
at the same time clearing exclusion flags (or vice versa) for 2 reasons:

	1) The DAX flag does not take effect immediately which
	   introduces quite a bit of complexity
	2) There is no clear use case for being this flexible

Finally, on regular files, flag the inode to not be cached to facilitate
changing S_DAX on the next creation of the inode.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>

Link: https://lore.kernel.org/r/20200528150003.828793-9-ira.weiny@intel.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-05-28 22:09:47 -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: fix return-value types in several function comments 2020-04-15 23:58:48 -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: save all error info in save_error_info() and drop ext4_set_errno() 2020-04-01 17:29:06 -04:00
dir.c ext4: use flexible-array member in struct fname 2020-03-14 14:43:13 -04:00
ext4_extents.h ext4: make some functions static in extents.c 2020-01-17 16:24:54 -05:00
ext4_jbd2.c ext4: remove set but not used variable 'es' in ext4_jbd2.c 2020-04-15 23:58:49 -04:00
ext4_jbd2.h ext4: disable dioread_nolock whenever delayed allocation is disabled 2020-03-26 10:57:42 -04:00
ext4.h fs/ext4: Introduce DAX inode flag 2020-05-28 22:09:47 -04:00
extents_status.c ext4: use percpu_counters for extent_status cache hits/misses 2019-08-28 11:19:23 -04:00
extents_status.h ext4: fix extent_status trace points 2020-01-25 02:03:03 -05:00
extents.c ext4: do not zeroout extents beyond i_disksize 2020-04-15 23:58:48 -04:00
file.c ext4: start to support iopoll method 2020-03-05 15:40:15 -05:00
fsmap.c ext4: fix miscellaneous sparse warnings 2019-05-12 04:49:47 -04:00
fsmap.h ext4: fix up remaining files with SPDX cleanups 2017-12-17 22:00:59 -05:00
fsync.c ext4: update ext4_sync_file() to not use __generic_file_fsync() 2019-11-05 11:31:40 -05:00
hash.c ext4: fix kernel oops caused by spurious casefold flag 2019-09-03 01:43:17 -04:00
ialloc.c fs/ext4: Only change S_DAX on inode load 2020-05-28 22:09:47 -04:00
indirect.c ext4: save all error info in save_error_info() and drop ext4_set_errno() 2020-04-01 17:29:06 -04:00
inline.c ext4: save all error info in save_error_info() and drop ext4_set_errno() 2020-04-01 17:29:06 -04:00
inode-test.c kunit: allow kunit tests to be loaded as a module 2020-01-09 16:42:29 -07:00
inode.c fs/ext4: Introduce DAX inode flag 2020-05-28 22:09:47 -04:00
ioctl.c fs/ext4: Introduce DAX inode flag 2020-05-28 22:09:47 -04:00
Kconfig This merge window, we've added some performance improvements in how we 2020-01-30 15:17:05 -08:00
Makefile kunit: allow kunit tests to be loaded as a module 2020-01-09 16:42:29 -07:00
mballoc.c ext4: convert BUG_ON's to WARN_ON's in mballoc.c 2020-04-15 23:58:49 -04:00
mballoc.h ext4: fix up remaining files with SPDX cleanups 2017-12-17 22:00:59 -05:00
migrate.c ext4: fix race between writepages and enabling EXT4_EXTENTS_FL 2020-02-21 19:32:07 -05:00
mmp.c ext4: save all error info in save_error_info() and drop ext4_set_errno() 2020-04-01 17:29:06 -04:00
move_extent.c ext4: save all error info in save_error_info() and drop ext4_set_errno() 2020-04-01 17:29:06 -04:00
namei.c ext4: save all error info in save_error_info() and drop ext4_set_errno() 2020-04-01 17:29:06 -04:00
page-io.c fs/buffer: Make BH_Uptodate_Lock bit_spin_lock a regular spinlock_t 2020-03-28 13:21:08 +01:00
readpage.c ext4: remove unneeded check for error allocating bio_post_read_ctx 2020-01-17 16:24:54 -05:00
resize.c ext4: fix potential race between s_flex_groups online resizing and access 2020-02-21 19:31:46 -05:00
super.c fs/ext4: Introduce DAX inode flag 2020-05-28 22:09:47 -04:00
symlink.c ext4: switch to fscrypt_get_symlink() 2018-01-11 22:10:40 -05:00
sysfs.c block: move the part_stat* helpers from genhd.h to a new header 2020-03-25 09:50:09 -06:00
truncate.h ext4: handle layout changes to pinned DAX mappings 2018-07-29 17:00:22 -04:00
verity.c fs/ext4: Introduce DAX inode flag 2020-05-28 22:09:47 -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: save all error info in save_error_info() and drop ext4_set_errno() 2020-04-01 17:29:06 -04:00
xattr.h ext4: use flexible-array member for xattr structs 2020-03-14 14:43:13 -04:00