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Steven Rostedt (Google) ca185770db eventfs: Keep all directory links at 1 
The directory link count in eventfs was somewhat bogus. It was only being
updated when a directory child was being looked up and not on creation.

One solution would be to update in get_attr() the link count by iterating
the ei->children list and then adding 2. But that could slow down simple
stat() calls, especially if it's done on all directories in eventfs.

Another solution would be to add a parent pointer to the eventfs_inode
and keep track of the number of sub directories it has on creation. But
this adds overhead for something not really worthwhile.

The solution decided upon is to keep all directory links in eventfs as 1.
This tells user space not to rely on the hard links of directories. Which
in this case it shouldn't.

Link: https://lore.kernel.org/linux-trace-kernel/20240201002719.GS2087318@ZenIV/
Link: https://lore.kernel.org/linux-trace-kernel/20240201161617.339968298@goodmis.org

Cc: stable@vger.kernel.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Ajay Kaher <ajay.kaher@broadcom.com>
Fixes: c1504e5102 ("eventfs: Implement eventfs dir creation functions")
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
 		2024-02-01 11:53:53 -05:00
..
9p 9p: Use length of data written to the server in preference to error 2024-01-04 13:15:31 +00:00
adfs adfs: remove writepage implementation 2023-12-29 11:58:33 -08:00
affs affs: d_obtain_alias(ERR_PTR(...)) will do the right thing 2023-12-21 12:51:02 -05:00
afs vfs-6.8.netfs 2024-01-19 09:10:23 -08:00
autofs dcache stuff for this cycle 2024-01-11 20:11:35 -08:00
bcachefs More bcachefs updates for 6.7-rc1 2024-01-21 14:01:12 -08:00
befs befs: d_obtain_alias(ERR_PTR(...)) will do the right thing 2023-12-21 12:51:02 -05:00
bfs misc cleanups (the part that hadn't been picked by individual fs trees) 2024-01-11 20:23:50 -08:00
btrfs for-6.8/block-2024-01-08 2024-01-11 13:58:04 -08:00
cachefiles vfs-6.8.netfs 2024-01-19 09:10:23 -08:00
ceph Assorted CephFS fixes and cleanups with nothing standing out. 2024-01-19 09:58:55 -08:00
coda dcache stuff for this cycle 2024-01-11 20:11:35 -08:00
configfs
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cramfs vfs-6.7.ctime 2023-10-30 09:47:13 -10:00
crypto fscrypt: document that CephFS supports fscrypt now 2023-12-26 22:55:42 -06:00
debugfs Merge branches 'acpi-pm', 'acpi-video', 'acpi-apei' and 'acpi-extlog' 2024-01-04 13:19:40 +01:00
devpts fs: Remove the now superfluous sentinel elements from ctl_table array 2023-12-28 04:57:57 -08:00
dlm dlm: update format header reflect current format 2023-12-20 15:36:48 -06:00
ecryptfs fix directory locking scheme on rename 2024-01-11 20:00:22 -08:00
efivarfs efivarfs: automatically update super block flag 2023-12-11 11:19:18 +01:00
efs vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
erofs vfs-6.8.netfs 2024-01-19 09:10:23 -08:00
exfat exfat: do not zero the extended part 2024-01-08 21:57:22 +09:00
exportfs fs: fix build error with CONFIG_EXPORTFS=m or not defined 2023-10-28 16:16:19 +02:00
ext2 fix directory locking scheme on rename 2024-01-11 20:00:22 -08:00
ext4 misc cleanups (the part that hadn't been picked by individual fs trees) 2024-01-11 20:23:50 -08:00
f2fs f2fs: fix double free of f2fs_sb_info 2024-01-12 18:55:09 -08:00
fat vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
freevxfs freevxfs: lookup: fix function params kernel-doc 2023-12-20 15:02:58 -08:00
fuse vfs-6.8.rw 2024-01-08 11:11:51 -08:00
gfs2 dlm for 6.8 2024-01-10 10:17:23 -08:00
hfs hfs: really remove hfs_writepage 2023-12-29 11:58:34 -08:00
hfsplus Many singleton patches against the MM code. The patch series which 2024-01-09 11:18:47 -08:00
hostfs hostfs: use d_splice_alias() calling conventions to simplify failure exits 2023-12-21 12:51:00 -05:00
hpfs
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hugetlbfs Many singleton patches against the MM code. The patch series which 2024-01-09 11:18:47 -08:00
iomap mm: add folio_fill_tail() and use it in iomap 2023-12-10 16:51:36 -08:00
isofs
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jbd2 jbd2: abort journal when detecting metadata writeback error of fs dev 2024-01-04 23:42:21 -05:00
jffs2 jffs2: mark __jffs2_dbg_superblock_counts() static 2023-12-10 17:21:43 -08:00
jfs jfs: Add missing set_freezable() for freezable kthread 2024-01-02 11:06:52 -06:00
kernfs Revert "kernfs: convert kernfs_idr_lock to an irq safe raw spinlock" 2024-01-11 11:51:27 +01:00
lockd sysctl-6.8-rc1 2024-01-10 17:44:36 -08:00
minix minixfs kmap_local_page() switchover and related fixes - very similar to sysv series. 2024-01-11 19:54:18 -08:00
netfs vfs-6.8.netfs 2024-01-19 09:10:23 -08:00
nfs vfs-6.8.netfs 2024-01-19 09:10:23 -08:00
nfs_common
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nfsd misc cleanups (the part that hadn't been picked by individual fs trees) 2024-01-11 20:23:50 -08:00
nilfs2 misc cleanups (the part that hadn't been picked by individual fs trees) 2024-01-11 20:23:50 -08:00
nls
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notify dcache stuff for this cycle 2024-01-11 20:11:35 -08:00
ntfs sysctl-6.8-rc1 2024-01-10 17:44:36 -08:00
ntfs3 vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
ocfs2 misc cleanups (the part that hadn't been picked by individual fs trees) 2024-01-11 20:23:50 -08:00
omfs
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openpromfs
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orangefs orangefs: saner arguments passing in readdir guts 2023-12-21 12:53:36 -05:00
overlayfs dcache stuff for this cycle 2024-01-11 20:11:35 -08:00
proc 17 hotfixes. 10 address post-6.7 issues and the other 7 are cc:stable. 2024-01-17 09:31:36 -08:00
pstore pstore: inode: Use cleanup.h for struct pstore_private 2023-12-08 14:15:44 -08:00
qnx4 qnx4: Use get_directory_fname() in qnx4_match() 2023-12-13 11:19:18 -08:00
qnx6
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quota sysctl-6.8-rc1 2024-01-10 17:44:36 -08:00
ramfs mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER 2024-01-08 15:27:15 -08:00
reiserfs misc cleanups (the part that hadn't been picked by individual fs trees) 2024-01-11 20:23:50 -08:00
romfs vfs-6.7.ctime 2023-10-30 09:47:13 -10:00
smb Various smb client fixes, including multichannel and for SMB3.1.1 POSIX extensions 2024-01-20 16:48:07 -08:00
squashfs Squashfs: fix variable overflow triggered by sysbot 2023-12-10 17:21:26 -08:00
sysfs fs/sysfs/dir.c : Fix typo in comment 2023-12-07 11:35:23 +09:00
sysv sysv: remove writepage implementation 2023-12-29 11:58:35 -08:00
tracefs eventfs: Keep all directory links at 1 2024-02-01 11:53:53 -05:00
ubifs ubifs: fix kernel-doc warnings 2024-01-06 23:49:50 +01:00
udf misc cleanups (the part that hadn't been picked by individual fs trees) 2024-01-11 20:23:50 -08:00
ufs Many singleton patches against the MM code. The patch series which 2024-01-09 11:18:47 -08:00
unicode
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vboxsf fs: vboxsf: fix a kernel-doc warning 2023-12-08 15:32:31 -07:00
verity Networking changes for 6.8. 2024-01-11 10:07:29 -08:00
xfs Bug fixes for 6.8: 2024-01-19 09:57:08 -08:00
zonefs misc cleanups (the part that hadn't been picked by individual fs trees) 2024-01-11 20:23:50 -08:00
Kconfig vfs-6.8.netfs 2024-01-19 09:10:23 -08:00
Kconfig.binfmt
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Makefile vfs-6.8.netfs 2024-01-19 09:10:23 -08:00
aio.c sysctl-6.8-rc1 2024-01-10 17:44:36 -08:00
anon_inodes.c Merge branch 'kvm-guestmemfd' into HEAD 2023-11-14 08:31:31 -05:00
attr.c fs: fix doc comment typo fs tree wide 2023-12-21 13:17:54 +01:00
backing-file.c fs: factor out backing_file_mmap() helper 2023-12-23 16:35:09 +02:00
bad_inode.c
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binfmt_elf.c
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binfmt_elf_fdpic.c execve updates for v6.7-rc1 2023-10-30 19:28:19 -10:00
binfmt_elf_test.c
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binfmt_flat.c
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binfmt_misc.c execve updates for v6.7-rc1 2023-10-30 19:28:19 -10:00
binfmt_script.c
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buffer.c Many singleton patches against the MM code. The patch series which 2024-01-09 11:18:47 -08:00
char_dev.c As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
compat_binfmt_elf.c
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coredump.c fs: Remove the now superfluous sentinel elements from ctl_table array 2023-12-28 04:57:57 -08:00
d_path.c
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dax.c fs : Fix warning using plain integer as NULL 2023-11-18 15:00:01 +01:00
dcache.c dcache stuff for this cycle 2024-01-11 20:11:35 -08:00
direct-io.c fs : Fix warning using plain integer as NULL 2023-11-18 15:00:01 +01:00
drop_caches.c
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eventfd.c eventfd: Remove usage of the deprecated ida_simple_xx() API 2023-12-12 14:24:55 +01:00
eventpoll.c fs: Remove the now superfluous sentinel elements from ctl_table array 2023-12-28 04:57:57 -08:00
exec.c execve: open the executable file before doing anything else 2024-01-20 12:15:43 -08:00
fcntl.c
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fhandle.c exportfs: add helpers to check if filesystem can encode/decode file handles 2023-10-24 17:57:45 +02:00
file.c file: remove __receive_fd() 2023-12-12 14:24:14 +01:00
file_table.c dcache stuff for this cycle 2024-01-11 20:11:35 -08:00
filesystems.c
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fs-writeback.c netfs: Move pinning-for-writeback from fscache to netfs 2023-12-24 15:08:49 +00:00
fs_context.c
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fs_parser.c
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fs_pin.c
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fs_struct.c
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fs_types.c
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fsopen.c
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init.c
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inode.c fix directory locking scheme on rename 2024-01-11 20:00:22 -08:00
internal.h dcache stuff for this cycle 2024-01-11 20:11:35 -08:00
ioctl.c lsm: new security_file_ioctl_compat() hook 2023-12-24 15:48:03 -05:00
kernel_read_file.c
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libfs.c dcache stuff for this cycle 2024-01-11 20:11:35 -08:00
locks.c fs: Remove the now superfluous sentinel elements from ctl_table array 2023-12-28 04:57:57 -08:00
mbcache.c
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mnt_idmapping.c mnt_idmapping: decouple from namespaces 2023-11-28 14:08:47 +01:00
mount.h mounts: keep list of mounts in an rbtree 2023-11-18 14:56:16 +01:00
mpage.c fs: convert block_write_full_page to block_write_full_folio 2023-12-29 11:58:35 -08:00
namei.c fix buggered locking in bch2_ioctl_subvolume_destroy() 2024-01-12 18:04:01 -08:00
namespace.c fs: rework listmount() implementation 2024-01-13 13:06:25 +01:00
nsfs.c nsfs: use d_make_root() 2023-11-25 02:49:43 -05:00
open.c vfs-6.8.rw 2024-01-08 11:11:51 -08:00
pipe.c sysctl-6.8-rc1 2024-01-10 17:44:36 -08:00
pnode.c mounts: keep list of mounts in an rbtree 2023-11-18 14:56:16 +01:00
pnode.h
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posix_acl.c fs: fix doc comment typo fs tree wide 2023-12-21 13:17:54 +01:00
proc_namespace.c namespace: extract show_path() helper 2023-11-18 14:56:16 +01:00
read_write.c fsnotify: optionally pass access range in file permission hooks 2023-12-12 16:20:02 +01:00
readdir.c fsnotify: optionally pass access range in file permission hooks 2023-12-12 16:20:02 +01:00
remap_range.c fsnotify: optionally pass access range in file permission hooks 2023-12-12 16:20:02 +01:00
select.c
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seq_file.c
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signalfd.c
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splice.c fs: use splice_copy_file_range() inline helper 2023-12-12 16:20:02 +01:00
stack.c
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stat.c vfs-6.8.mount 2024-01-08 10:57:34 -08:00
statfs.c
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super.c fscrypt updates for 6.8 2024-01-10 10:24:49 -08:00
sync.c
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sysctls.c fs: Remove the now superfluous sentinel elements from ctl_table array 2023-12-28 04:57:57 -08:00
timerfd.c
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userfaultfd.c Generic: 2024-01-17 13:03:37 -08:00
utimes.c
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xattr.c
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