Randy Dodgen fd96b8da68 ext4: fix fault handling when mounted with -o dax,ro ... If an ext4 filesystem is mounted with both the DAX and read-only options, executables on that filesystem will fail to start (claiming 'Segmentation fault') due to the fault handler returning VM_FAULT_SIGBUS. This is due to the DAX fault handler (see ext4_dax_huge_fault) attempting to write to the journal when FAULT_FLAG_WRITE is set. This is the wrong behavior for write faults which will lead to a COW page; in particular, this fails for readonly mounts. This change avoids journal writes for faults that are expected to COW. It might be the case that this could be better handled in ext4_iomap_begin / ext4_iomap_end (called via iomap_ops inside dax_iomap_fault). These is some overlap already (e.g. grabbing journal handles). Signed-off-by: Randy Dodgen <dodgen@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>		2017-08-24 15:26:01 -04:00
..
acl.c	ext4: Don't clear SGID when inheriting ACLs	2017-07-30 23:33:01 -04:00
acl.h	ext2/3/4: use generic posix ACL infrastructure	2014-01-25 23:58:19 -05:00
balloc.c	The major change this cycle is deleting ext4's copy of the file system	2016-07-26 18:35:55 -07:00
bitmap.c	ext4: remove unused header files	2015-04-02 23:47:42 -04:00
block_validity.c	ext4: add missing KERN_CONT to a few more debugging uses	2016-10-15 09:57:31 -04:00
dir.c	ext4: use sizeof(*ptr)	2017-08-24 13:50:24 -04:00
ext4.h	ext4: backward compatibility support for Lustre ea_inode implementation	2017-08-24 14:25:02 -04:00
ext4_extents.h	ext4: fix misspellings in comments.	2016-03-09 23:49:05 -05:00
ext4_jbd2.c	ext4: add shutdown bit and check for it	2017-02-05 01:28:48 -05:00
ext4_jbd2.h	ext4, project: expand inode extra size if possible	2017-08-06 01:00:49 -04:00
extents.c	ext4: fix copy paste error in ext4_swap_extents()	2017-08-06 01:33:07 -04:00
extents_status.c	scripts/spelling.txt: add "comsume(r)" pattern and fix typo instances	2017-02-27 18:43:47 -08:00
extents_status.h	ext4: move procfs registration code to fs/ext4/sysfs.c	2015-09-23 12:46:17 -04:00
file.c	ext4: fix fault handling when mounted with -o dax,ro	2017-08-24 15:26:01 -04:00
fsmap.c	ext4: fix off-by-one fsmap error on 1k block filesystems	2017-06-23 00:58:57 -04:00
fsmap.h	ext4: support GETFSMAP ioctls	2017-04-30 00:36:53 -04:00
fsync.c	ext4: use errseq_t based error handling for reporting data writeback errors	2017-07-06 07:02:30 -04:00
hash.c	ext4: remove useless test and assignment in strtohash functions	2017-08-24 15:11:34 -04:00
ialloc.c	ext4: reduce lock contention in __ext4_new_inode	2017-08-24 12:56:35 -04:00
indirect.c	ext4: call journal revoke when freeing ea_inode blocks	2017-06-21 21:36:51 -04:00
inline.c	ext4: xattr-in-inode support	2017-06-21 21:10:32 -04:00
inode.c	ext4: backward compatibility support for Lustre ea_inode implementation	2017-08-24 14:25:02 -04:00
ioctl.c	ext4, project: expand inode extra size if possible	2017-08-06 01:00:49 -04:00
Kconfig	dax: fix build warnings with FS_DAX and !FS_IOMAP	2017-01-24 16:26:14 -08:00
Makefile	ext4: support GETFSMAP ioctls	2017-04-30 00:36:53 -04:00
mballoc.c	ext4: fix clang build regression	2017-08-14 08:29:18 -04:00
mballoc.h	ext4: send parallel discards on commit completions	2017-06-22 23:54:33 -04:00
migrate.c	ext4: do not set posix acls on xattr inodes	2017-06-21 21:21:39 -04:00
mmp.c	ext4: use sizeof(*ptr)	2017-08-24 13:50:24 -04:00
move_extent.c	ext4: add ext4_is_quota_file()	2017-06-22 11:31:25 -04:00
namei.c	ext4: make xattr inode reads faster	2017-08-06 00:07:01 -04:00
page-io.c	ext4: add support for passing in write hints for buffered writes	2017-06-27 12:05:44 -06:00
readpage.c	block: switch bios to blk_status_t	2017-06-09 09:27:32 -06:00
resize.c	ext4: fix overflow caused by missing cast in ext4_resize_fs()	2017-08-06 01:18:31 -04:00
super.c	ext4: fix quota inconsistency during orphan cleanup for read-only mounts	2017-08-24 15:21:50 -04:00
symlink.c	ext4: Add statx support	2017-04-03 01:05:58 -04:00
sysfs.c	ext4: check return value of kstrtoull correctly in reserved_clusters_store	2017-06-23 01:08:22 -04:00
truncate.h	ext4: fix races between page faults and hole punching	2015-12-07 14:28:03 -05:00
xattr.c	ext4: backward compatibility support for Lustre ea_inode implementation	2017-08-24 14:25:02 -04:00
xattr.h	ext4: fix __ext4_new_inode() journal credits calculation	2017-07-06 00:01:59 -04:00
xattr_security.c	switch xattr_handler->set() to passing dentry and inode separately	2016-05-27 15:39:43 -04:00
xattr_trusted.c	switch xattr_handler->set() to passing dentry and inode separately	2016-05-27 15:39:43 -04:00
xattr_user.c	switch xattr_handler->set() to passing dentry and inode separately	2016-05-27 15:39:43 -04:00