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Eric Biggers 07c9900131 fs-verity: support reading signature with ioctl 
Add support for FS_VERITY_METADATA_TYPE_SIGNATURE to
FS_IOC_READ_VERITY_METADATA.  This allows a userspace server program to
retrieve the built-in signature (if present) of a verity file for
serving to a client which implements fs-verity compatible verification.
See the patch which introduced FS_IOC_READ_VERITY_METADATA for more
details.

The ability for userspace to read the built-in signatures is also useful
because it allows a system that is using the in-kernel signature
verification to migrate to userspace signature verification.

This has been tested using a new xfstest which calls this ioctl via a
new subcommand for the 'fsverity' program from fsverity-utils.

Link: https://lore.kernel.org/r/20210115181819.34732-7-ebiggers@kernel.org
Reviewed-by: Victor Hsieh <victorhsieh@google.com>
Reviewed-by: Jaegeuk Kim <jaegeuk@kernel.org>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
2021-02-07 14:51:19 -08:00
..
caching
docs: filesystems: Replace HTTP links with HTTPS ones
2020-07-13 09:33:22 -06:00
cifs
docs: filesystems: convert cifs/cifsroot.txt to ReST
2020-05-05 09:22:21 -06:00
ext4
ext4: add docs about fast commit idempotence
2020-12-17 13:30:44 -05:00
nfs
nfsd: close cached files prior to a REMOVE or RENAME that would replace target
2020-12-09 09:39:38 -05:00
spufs
docs: filesystems: convert spufs/spu_run.txt to ReST
2020-05-05 09:22:24 -06:00
9p.rst
Replace HTTP links with HTTPS ones: 9P FILE SYSTEM
2020-07-13 11:28:12 -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
Replace HTTP links with HTTPS ones: AFS FILESYSTEM
2020-07-13 11:25:29 -06:00
api-summary.rst
docs: fs: api-summary.rst: get rid of kernel-doc include
2020-10-28 11:41:15 -06:00
autofs-mount-control.rst
Documentation: filesystems: autofs-mount-control: drop doubled words
2020-07-05 14:44:29 -06:00
autofs.rst
docs: filesystems: Add mount map description in Content
2019-11-18 12:19:59 -07:00
automount-support.rst
docs: filesystems: convert automount-support.txt to ReST
2020-05-05 09:22:21 -06:00
befs.rst
docs: filesystems: convert befs.txt to ReST
2020-03-02 14:01:25 -07:00
bfs.rst
docs: filesystems: convert bfs.txt to ReST
2020-03-02 14:01:26 -07:00
btrfs.rst
docs: filesystems: convert btrfs.txt to ReST
2020-03-02 14:01:28 -07:00
ceph.rst
libceph, rbd, ceph: "blacklist" -> "blocklist"
2020-10-12 15:29:26 +02:00
coda.rst
Documentation: coda: annotate duplicated words
2020-07-13 10:02:32 -06:00
configfs.rst
Documentation: filesystems: configfs: drop doubled word
2020-07-05 14:44:29 -06:00
cramfs.rst
docs: filesystems: convert cramfs.txt to ReST
2020-03-02 14:02:07 -07:00
dax.txt
This is the second round of ext4 commits for 5.8 merge window. It
2020-06-15 09:32:10 -07:00
debugfs.rst
debugfs: remove return value of debugfs_create_devm_seqfile()
2020-10-30 08:37:39 +01:00
devpts.rst
docs: filesystems: convert devpts.txt to ReST
2020-05-05 09:22:21 -06:00
directory-locking.rst
Documentation: filesystems: directory-locking: drop doubled word
2020-07-05 14:44:29 -06:00
dlmfs.rst
ocfs2: replace HTTP links with HTTPS ones
2020-08-07 11:33:22 -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
docs: filesystems: convert erofs.txt to ReST
2020-03-02 14:02:57 -07:00
ext2.rst
docs: filesystems: Reduce ext2.rst to one top-level heading
2020-11-09 15:33:54 +01:00
ext3.rst
docs: filesystems: convert ext3.txt to ReST
2020-03-02 14:03:16 -07:00
f2fs.rst
f2fs: add compress_mode mount option
2020-12-03 00:11:57 -08:00
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
docs: fs: fscrypt.rst: get rid of :c:type: tags
2020-10-15 07:49:42 +02:00
fsverity.rst
fs-verity: support reading signature with ioctl
2021-02-07 14:51:19 -08:00
fuse-io.rst
docs: filesystems: convert fuse-io.txt to ReST
2020-05-05 09:22:22 -06:00
fuse.rst
fuse: update project homepage
2020-09-04 11:32:10 +02:00
gfs2-glocks.rst
docs: filesystems: convert gfs2-glocks.txt to ReST
2020-06-02 19:45:05 +02:00
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
index.rst
docs: filesystems: link ubifs-authentication.rst without .rst extension
2020-11-13 15:07:47 -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/filesystems/locking.rst: remove an incorrect sentence
2020-09-02 07:59:59 -06:00
locks.rst
docs: filesystems: convert mandatory-locking.txt to ReST
2020-05-05 09:22:22 -06:00
mandatory-locking.rst
docs: filesystems: convert mandatory-locking.txt to ReST
2020-05-05 09:22:22 -06:00
mount_api.rst
Documentation: mount_api: change kernel log wording
2020-12-03 15:53:13 -07:00
nilfs2.rst
docs: filesystems: convert nilfs2.txt to ReST
2020-03-02 14:04:06 -07:00
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
ocfs2: replace HTTP links with HTTPS ones
2020-08-07 11:33:22 -07:00
omfs.rst
Replace HTTP links with HTTPS ones: OMFS
2020-07-13 11:24:43 -06:00
orangefs.rst
docs: orangefs: fix pvfs2tab literal block
2020-04-28 12:35:47 -06:00
overlayfs.rst
ovl: user xattr
2020-12-14 15:26:14 +01:00
path-lookup.rst
docs: path-lookup: markup fixes for emphasis
2020-07-27 16:14:13 -06:00
path-lookup.txt
Replace HTTP links with HTTPS ones: documentation
2020-06-08 09:30:19 -06:00
porting.rst
ovl: make private mounts longterm
2020-06-04 10:48:19 +02:00
proc.rst
proc: provide details on indirect branch speculation
2020-12-15 22:46:15 -08:00
qnx6.rst
docs: filesystems: fix typo in qnx6.rst
2020-04-07 13:20:56 -06:00
quota.rst
quota: Fixup http links in quota doc
2020-07-09 08:14:01 +02:00
ramfs-rootfs-initramfs.rst
Replace HTTP links with HTTPS ones: Documentation/filesystems
2020-06-26 11:14:12 -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
doc: seq_file: clarify role of *pos in ->next()
2020-09-28 15:19:44 -06:00
sharedsubtree.rst
docs: filesystems: convert sharedsubtree.txt to ReST
2020-05-05 09:22:23 -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 patches for 5.10-rc1
2020-10-14 16:09:32 -07:00
sysv-fs.rst
docs: filesystems: convert sysv-fs.txt to ReST
2020-03-02 14:04:41 -07:00
tmpfs.rst
tmpfs: fix Documentation nits
2020-12-15 12:13:39 -08:00
ubifs-authentication.rst
docs: ubifs-authentication: Add a top-level heading
2020-09-09 11:53:33 -06:00
ubifs.rst
docs: filesystems: convert ubifs.txt to ReST
2020-03-02 14:04:41 -07:00
udf.rst
udf: Replace HTTP links with HTTPS ones
2020-07-14 14:37:39 +02:00
vfat.rst
Documentation: filesystems: convert vfat.txt to RST
2020-01-10 10:58:45 -07:00
vfs.rst
docs: filesystems: vfs: correct flag name
2020-07-27 16:19:51 -06:00
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
docs: filesystems: convert xfs-delayed-logging-design.txt to ReST
2020-05-05 09:22:24 -06:00
xfs-self-describing-metadata.rst
New code for 5.8:
2020-06-02 19:21:40 -07:00
zonefs.rst
zonefs: document the explicit-open mount option
2020-09-15 18:32:58 +09:00