Eric Biggers 15baf55481 fscrypt: track master key presence separately from secret ... Master keys can be in one of three states: present, incompletely removed, and absent (as per FSCRYPT_KEY_STATUS_* used in the UAPI). Currently, the way that "present" is distinguished from "incompletely removed" internally is by whether ->mk_secret exists or not. With extent-based encryption, it will be necessary to allow per-extent keys to be derived while the master key is incompletely removed, so that I/O on open files will reliably continue working after removal of the key has been initiated. (We could allow I/O to sometimes fail in that case, but that seems problematic for reasons such as writes getting silently thrown away and diverging from the existing fscrypt semantics.) Therefore, when the filesystem is using extent-based encryption, ->mk_secret can't be wiped when the key becomes incompletely removed. As a prerequisite for doing that, this patch makes the "present" state be tracked using a new field, ->mk_present. No behavior is changed yet. The basic idea here is borrowed from Josef Bacik's patch "fscrypt: use a flag to indicate that the master key is being evicted" (https://lore.kernel.org/r/e86c16dddc049ff065f877d793ad773e4c6bfad9.1696970227.git.josef@toxicpanda.com). I reimplemented it using a "present" bool instead of an "evicted" flag, fixed a couple bugs, and tried to update everything to be consistent. Note: I considered adding a ->mk_status field instead, holding one of FSCRYPT_KEY_STATUS_*. At first that seemed nice, but it ended up being more complex (despite simplifying FS_IOC_GET_ENCRYPTION_KEY_STATUS), since it would have introduced redundancy and had weird locking rules. Reviewed-by: Neal Gompa <neal@gompa.dev> Reviewed-by: Josef Bacik <josef@toxicpanda.com> Link: https://lore.kernel.org/r/20231015061055.62673-1-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com>		2023-10-16 21:23:45 -07:00
..
caching	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
ext4	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
nfs	NFSD 6.6 Release Notes	2023-08-31 15:32:18 -07:00
smb	smb3: move Documentation/filesystems/cifs to Documentation/filesystems/smb	2023-05-24 16:29:21 -05:00
spufs	Documentation: spufs: correct a duplicate word typo	2022-09-27 13:21:44 -06:00
9p.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
adfs.rst	docs: filesystems: convert adfs.txt to ReST	2020-03-02 13:58:44 -07:00
affs.rst	affs: fix basic permission bits to actually work	2020-08-31 12:20:31 +02:00
afs.rst	afs: Documentation: correct reference to CONFIG_AFS_FS	2023-07-21 13:46:02 -06:00
api-summary.rst	block: move fs/block_dev.c to block/bdev.c	2021-09-07 08:39:40 -06:00
autofs-mount-control.rst	autofs: use flexible array in ioctl structure	2023-05-30 16:42:00 -07:00
autofs.rst	autofs: use flexible array in ioctl structure	2023-05-30 16:42:00 -07:00
automount-support.rst	docs: filesystems: convert automount-support.txt to ReST	2020-05-05 09:22:21 -06:00
befs.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
bfs.rst	docs: filesystems: convert bfs.txt to ReST	2020-03-02 14:01:26 -07:00
btrfs.rst	MAINTAINERS: remove links to obsolete btrfs.wiki.kernel.org	2023-09-08 14:21:27 +02:00
ceph.rst	ceph: update documentation regarding snapshot naming limitations	2023-08-24 11:24:36 +02:00
coda.rst	Documentation: coda: annotate duplicated words	2020-07-13 10:02:32 -06:00
configfs.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
cramfs.rst	docs: filesystems: convert cramfs.txt to ReST	2020-03-02 14:02:07 -07:00
dax.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
debugfs.rst	debugfs: small Documentation cleaning	2022-11-09 13:58:55 -07:00
devpts.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
directory-locking.rst	fs: Lock moved directories	2023-06-02 15:00:18 +02:00
dlmfs.rst	docs: update ocfs2-devel mailing list address	2023-07-08 09:29:29 -07:00
dnotify.rst	docs: filesystems: convert dnotify.txt to ReST	2020-05-05 09:22:22 -06:00
ecryptfs.rst	docs: prevent warnings due to autosectionlabel	2020-03-20 17:01:29 -06:00
efivarfs.rst	docs: filesystems: add info about efivars content	2020-05-25 18:59:59 -06:00
erofs.rst	erofs: set block size to the on-disk block size	2023-04-17 01:15:45 +08:00
ext2.rst	ext2: remove nobh support	2022-08-02 12:34:04 -04:00
ext3.rst	docs: filesystems: convert ext3.txt to ReST	2020-03-02 14:03:16 -07:00
f2fs.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
fiemap.rst	A lot of bug fixes and cleanups for ext4, including:	2020-06-05 16:19:28 -07:00
files.rst	file: Rename fcheck lookup_fd_rcu	2020-12-10 12:40:07 -06:00
fscrypt.rst	fscrypt: track master key presence separately from secret	2023-10-16 21:23:45 -07:00
fsverity.rst	ovl: Add framework for verity support	2023-08-12 19:02:38 +03:00
fuse-io.rst	docs: filesystems: convert fuse-io.txt to ReST	2020-05-05 09:22:22 -06:00
fuse.rst	fuse: Add module param for CAP_SYS_ADMIN access bypassing allow_other	2022-07-21 16:06:19 +02:00
gfs2-glocks.rst	gfs2 fixes	2023-09-05 13:00:28 -07:00
gfs2-uevents.rst	docs: filesystems: convert gfs2-uevents.txt to ReST	2020-03-02 14:03:35 -07:00
gfs2.rst	Documentation: Update filesystems/gfs2.rst	2020-12-01 00:25:20 +01:00
hfs.rst	Replace HTTP links with HTTPS ones: Documentation/filesystems	2020-06-26 11:14:12 -06:00
hfsplus.rst	docs: filesystems: convert hfsplus.txt to ReST	2020-03-02 14:03:47 -07:00
hpfs.rst	Replace HTTP links with HTTPS ones: Documentation/filesystems	2020-06-26 11:14:12 -06:00
idmappings.rst	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
index.rst	docs: add maintainer entry profile for XFS	2023-08-10 07:47:53 -07:00
inotify.rst	docs: filesystems: convert inotify.txt to ReST	2020-03-02 14:03:55 -07:00
isofs.rst	docs: filesystems: convert isofs.txt to ReST	2020-03-02 14:04:06 -07:00
journalling.rst	jbd2: drop jbd2_fc_init documentation	2020-11-06 23:01:03 -05:00
locking.rst	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
locks.rst	docs: fs: locks.rst: update comment about mandatory file locking	2021-10-19 06:48:21 -04:00
mount_api.rst	fs_context: drop the unused lsm_flags member	2023-03-16 14:38:28 +01:00
netfs_library.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
nilfs2.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
ntfs3.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
ntfs.rst	docs: filesystems: convert ntfs.txt to ReST	2020-03-02 14:04:06 -07:00
ocfs2-online-filecheck.rst	docs: filesystems: convert ocfs2-online-filecheck.txt to ReST	2020-03-02 14:04:06 -07:00
ocfs2.rst	docs: update ocfs2-devel mailing list address	2023-07-08 09:29:29 -07:00
omfs.rst	Replace HTTP links with HTTPS ones: OMFS	2020-07-13 11:24:43 -06:00
orangefs.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
overlayfs.rst	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
path-lookup.rst	Merge branch 'work.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2021-07-03 11:41:14 -07:00
path-lookup.txt	Replace HTTP links with HTTPS ones: documentation	2020-06-08 09:30:19 -06:00
porting.rst	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
proc.rst	- Stefan Roesch has added ksm statistics to /proc/pid/smaps	2023-09-05 10:56:27 -07:00
qnx6.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
quota.rst	quota: Fixup http links in quota doc	2020-07-09 08:14:01 +02:00
ramfs-rootfs-initramfs.rst	Documentation/filesystems: ramfs-rootfs-initramfs: use :Author:	2023-05-16 12:55:35 -06:00
relay.rst	docs: filesystems: convert relay.txt to ReST	2020-03-02 14:04:41 -07:00
romfs.rst	docs: filesystems: convert romfs.txt to ReST	2020-03-02 14:04:41 -07:00
seq_file.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
sharedsubtree.rst	Documentation/filesystems: sharedsubtree: add section headings	2023-05-16 12:50:05 -06:00
splice.rst	docs: Bring some order to filesystem documentation	2019-03-06 09:46:10 -07:00
squashfs.rst	docs: filesystems: convert squashfs.txt to ReST	2020-03-02 14:04:41 -07:00
sysfs.rst	driver core: bus: mark the struct bus_type for sysfs callbacks as constant	2023-03-23 13:20:40 +01:00
sysv-fs.rst	docs: filesystems: convert sysv-fs.txt to ReST	2020-03-02 14:04:41 -07:00
tmpfs.rst	tmpfs,xattr: enable limited user extended attributes	2023-08-10 12:06:04 +02:00
ubifs-authentication.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
ubifs.rst	Documentation: ubifs: Fix compression idiom	2022-10-10 13:01:10 -06:00
udf.rst	udf: Replace HTTP links with HTTPS ones	2020-07-14 14:37:39 +02:00
vfat.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
vfs.rst	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
virtiofs.rst	virtiofs: Add mount option and atime behavior to the doc	2020-04-20 17:01:34 +02:00
xfs-delayed-logging-design.rst	Documentation: filesystems: correct possessive "its"	2022-09-27 13:21:44 -06:00
xfs-maintainer-entry-profile.rst	docs: add maintainer entry profile for XFS	2023-08-10 07:47:53 -07:00
xfs-online-fsck-design.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
xfs-self-describing-metadata.rst	xfs: document the filesystem metadata checking strategy	2023-04-11 18:59:47 -07:00
zonefs.rst	Documentation: Fix typos	2023-08-18 11:29:03 -06:00