Hugh Dickins 2daf18a788 tmpfs,xattr: enable limited user extended attributes ... Enable "user." extended attributes on tmpfs, limiting them by tracking the space they occupy, and deducting that space from the limited ispace (unless tmpfs mounted with nr_inodes=0 to leave that ispace unlimited). tmpfs inodes and simple xattrs are both unswappable, and have to be in lowmem on a 32-bit highmem kernel: so the ispace limit is appropriate for xattrs, without any need for a further mount option. Add simple_xattr_space() to give approximate but deterministic estimate of the space taken up by each xattr: with simple_xattrs_free() outputting the space freed if required (but kernfs and even some tmpfs usages do not require that, so don't waste time on strlen'ing if not needed). Security and trusted xattrs were already supported: for consistency and simplicity, account them from the same pool; though there's a small risk that a tmpfs with enough space before would now be considered too small. When extended attributes are used, "df -i" does show more IUsed and less IFree than can be explained by the inodes: document that (manpage later). xfstests tests/generic which were not run on tmpfs before but now pass: 020 037 062 070 077 097 103 117 337 377 454 486 523 533 611 618 728 with no new failures. Signed-off-by: Hugh Dickins <hughd@google.com> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com> Message-Id: <2e63b26e-df46-5baa-c7d6-f9a8dd3282c5@google.com> Signed-off-by: Christian Brauner <brauner@kernel.org>		2023-08-10 12:06:04 +02:00
..
caching	Remove duplicate words inside documentation	2022-09-27 13:21:43 -06:00
ext4	ext4: update doc about journal superblock description	2023-06-26 19:35:13 -04:00
nfs	exportfs: add explicit flag to request non-decodeable file handles	2023-05-22 18:08:37 +02:00
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	fs/9p: Rework cache modes and add new options to Documentation	2023-04-09 21:41:21 +00:00
adfs.rst
affs.rst	affs: fix basic permission bits to actually work	2020-08-31 12:20:31 +02:00
afs.rst	AFS: Documentation: fix a few typos in afs.rst	2021-01-21 14:06:00 -07:00
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
bfs.rst
btrfs.rst	Documentation: update btrfs list of features and link to readthedocs.io	2022-06-21 14:47:19 +02:00
ceph.rst	ceph: remove Sage's git tree from documentation	2022-10-04 19:18:08 +02:00
coda.rst	Documentation: coda: annotate duplicated words	2020-07-13 10:02:32 -06:00
configfs.rst	configfs: remove mentions of committable items	2022-12-02 11:11:27 +01:00
cramfs.rst
dax.rst	Documentation/filesystem/dax: update DAX description on erofs	2022-03-16 09:38:38 +08:00
debugfs.rst	debugfs: small Documentation cleaning	2022-11-09 13:58:55 -07:00
devpts.rst	docs: filesystems: convert devpts.txt to ReST	2020-05-05 09:22:21 -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
f2fs.rst	f2fs: support errors=remount-ro|continue|panic mountoption	2023-05-08 11:18:04 -07:00
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: support decrypting data from large folios	2023-01-28 15:10:12 -08:00
fsverity.rst	fsverity: improve documentation for builtin signature support	2023-06-20 22:47:55 -07:00
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	docs: filesystems: convert gfs2-glocks.txt to ReST	2020-06-02 19:45:05 +02:00
gfs2-uevents.rst
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
hpfs.rst	Replace HTTP links with HTTPS ones: Documentation/filesystems	2020-06-26 11:14:12 -06:00
idmappings.rst	Documentation: update idmappings.rst	2023-03-14 14:16:57 +01:00
index.rst	smb3: move Documentation/filesystems/cifs to Documentation/filesystems/smb	2023-05-24 16:29:21 -05:00
inotify.rst
isofs.rst
journalling.rst	jbd2: drop jbd2_fc_init documentation	2020-11-06 23:01:03 -05:00
locking.rst	libfs: Add directory operations for stable offsets	2023-08-09 09:15:40 +02:00
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	netfs: do not unlock and put the folio twice	2022-07-14 10:10:12 +02:00
nilfs2.rst
ntfs3.rst	fs/ntfs3: Remove noacsrules	2023-03-27 16:59:17 +04:00
ntfs.rst
ocfs2-online-filecheck.rst
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	docs: orangefs: fix pvfs2tab literal block	2020-04-28 12:35:47 -06:00
overlayfs.rst	ovl: store enum redirect_mode in config instead of a string	2023-06-19 14:02:01 +03:00
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	fs: rename current get acl method	2022-10-20 10:13:27 +02:00
proc.rst	Mainly singleton patches all over the place. Series of note are:	2023-04-27 19:57:00 -07:00
qnx6.rst	Documentation: filesystems: correct possessive "its"	2022-09-27 13:21:44 -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
romfs.rst
seq_file.rst	seq_file: document how per-entry resources are managed.	2021-02-26 09:41:05 -08:00
sharedsubtree.rst	Documentation/filesystems: sharedsubtree: add section headings	2023-05-16 12:50:05 -06:00
splice.rst
squashfs.rst
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
tmpfs.rst	tmpfs,xattr: enable limited user extended attributes	2023-08-10 12:06:04 +02:00
ubifs-authentication.rst	docs: ubifs-authentication: Add a top-level heading	2020-09-09 11:53:33 -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	docs: filesystems: Fix a mundane typo	2021-03-25 11:51:23 -06:00
vfs.rst	libfs: Add directory operations for stable offsets	2023-08-09 09:15:40 +02:00
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-online-fsck-design.rst	xfs: document future directions of online fsck	2023-04-11 18:59:52 -07:00
xfs-self-describing-metadata.rst	xfs: document the filesystem metadata checking strategy	2023-04-11 18:59:47 -07:00
zonefs.rst	documentation: zonefs: Document sysfs attributes	2022-04-26 14:53:06 +09:00