linux/fs
Christian Brauner dfd78546c9 pidfd: add a new supported_mask field
Some of the future fields in struct pidfd_info can be optional. If the
kernel has nothing to emit in that field, then it doesn't set the flag
in the reply. This presents a problem: There is currently no way to know
what mask flags the kernel supports since one can't always count on them
being in the reply.

Add a new PIDFD_INFO_SUPPORTED_MASK flag and field that the kernel can
set in the reply. Userspace can use this to determine if the fields it
requires from the kernel are supported. This also gives us a way to
deprecate fields in the future, if that should become necessary.

Link: https://patch.msgid.link/20251028-work-coredump-signal-v1-5-ca449b7b7aa0@kernel.org
Reviewed-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-10-30 14:25:13 +01:00
..
9p Bunch of unrelated fixes 2025-10-09 11:56:59 -07:00
adfs vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
affs vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
afs Simplifying ->d_name audits, easy part. 2025-10-03 11:14:02 -07:00
autofs
befs
bfs vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
btrfs for-6.18-tag 2025-10-06 13:53:19 -07:00
cachefiles VFS: unify old_mnt_idmap and new_mnt_idmap in renamedata 2025-09-23 12:37:35 +02:00
ceph Some messenger improvements from Eric and Max, a patch to address the 2025-10-10 11:30:19 -07:00
coda vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
configfs file->f_path constification 2025-10-03 16:32:36 -07:00
cramfs Patch series in this pull request: 2025-10-02 18:44:54 -07:00
crypto fscrypt updates for 6.18 2025-09-29 15:33:50 -07:00
debugfs vfs-6.18-rc1.async 2025-09-29 11:55:15 -07:00
devpts
dlm dlm for 6.18 2025-09-29 15:24:58 -07:00
ecryptfs mount-related stuff for this cycle 2025-10-03 10:19:44 -07:00
efivarfs vfs-6.18-rc1.misc 2025-09-29 09:03:07 -07:00
efs
erofs erofs: drop redundant sanity check for ztailpacking inline 2025-09-25 11:26:39 +08:00
exfat Description for this pull request: 2025-10-03 14:02:53 -07:00
exportfs
ext2 \n 2025-07-28 16:16:09 -07:00
ext4 New ext4 features: 2025-10-03 13:47:10 -07:00
f2fs f2fs-for-6.18-rc1 2025-10-03 14:05:12 -07:00
fat vfat: remove unused variable 2025-09-13 17:32:47 -07:00
freevxfs
fuse fuse update for 6.18 2025-10-03 12:48:18 -07:00
gfs2 finish_no_open calling conventions change 2025-10-03 10:59:31 -07:00
hfs hfs/hfsplus: rework debug output subsystem 2025-09-24 16:30:34 -07:00
hfsplus hfs/hfsplus: rework debug output subsystem 2025-09-24 16:30:34 -07:00
hostfs fs: rename generic_delete_inode() and generic_drop_inode() 2025-09-15 16:09:42 +02:00
hpfs - Avoid -Wflex-array-member-not-at-end warnings 2025-10-10 14:06:02 -07:00
hugetlbfs Summary of significant series in this pull request: 2025-10-02 18:18:33 -07:00
iomap iomap: open code bio_iov_iter_get_bdev_pages 2025-10-07 08:05:44 -06:00
isofs Current exclusion rules for ->d_flags stores are rather unpleasant. 2025-07-28 09:17:57 -07:00
jbd2 jbd2: increase IO priority of checkpoint 2025-09-25 14:37:07 -04:00
jffs2 mm: introduce memdesc_flags_t 2025-09-13 16:55:07 -07:00
jfs A few fixes and cleanups for JFS. 2025-10-03 13:54:23 -07:00
kernfs vfs-6.18-rc1.misc 2025-09-29 09:03:07 -07:00
lockd SUNRPC: Move the svc_rpcb_cleanup() call sites 2025-09-23 13:28:19 -04:00
minix minixfs: Verify inode mode when loading from disk 2025-08-19 13:30:46 +02:00
netfs vfs-6.18-rc1.workqueue 2025-09-29 10:27:17 -07:00
nfs file->f_path constification 2025-10-03 16:32:36 -07:00
nfs_common NFS/localio: nfs_uuid_put() fix the wake up after unlinking the file 2025-08-05 16:45:40 -07:00
nfsd NFSD 6.18 Release Notes 2025-10-06 13:22:21 -07:00
nilfs2 Merge branch 'mm-hotfixes-stable' into mm-stable in order to pick up 2025-09-21 14:19:36 -07:00
nls
notify \n 2025-10-03 13:23:10 -07:00
ntfs3 ntfs3: stop using write_cache_pages 2025-09-13 16:55:13 -07:00
ocfs2 Patch series in this pull request: 2025-10-02 18:44:54 -07:00
omfs vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
openpromfs
orangefs orangefs: Two cleanups and a bug fix. 2025-10-03 13:59:56 -07:00
overlayfs file->f_path constification 2025-10-03 16:32:36 -07:00
proc Patch series in this pull request: 2025-10-02 18:44:54 -07:00
pstore pstore update for v6.18-rc1 2025-09-29 18:08:34 -07:00
qnx4
qnx6
quota fs: replace use of system_unbound_wq with system_dfl_wq 2025-09-19 16:15:07 +02:00
ramfs fs: rename generic_delete_inode() and generic_drop_inode() 2025-09-15 16:09:42 +02:00
resctrl fs/resctrl: Fix counter auto-assignment on mkdir with mbm_event enabled 2025-09-17 11:31:12 +02:00
romfs
smb 20 smb client fixes 2025-10-10 11:23:57 -07:00
squashfs Patch series in this pull request: 2025-10-02 18:44:54 -07:00
sysfs sysfs: remove bin_attribute::read_new/write_new() 2025-08-19 13:12:12 +02:00
tests
tracefs Massage rpc_pipefs to use saner primitives and clean up the 2025-07-28 09:56:09 -07:00
ubifs Summary of significant series in this pull request: 2025-10-02 18:18:33 -07:00
udf fs: udf: fix OOB read in lengthAllocDescs handling 2025-09-22 15:33:56 +02:00
ufs vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
unicode
vboxsf simplify vboxsf_dir_atomic_open() 2025-09-16 23:59:38 -04:00
verity Optimize fsverity with 2-way interleaved hashing 2025-09-29 15:55:20 -07:00
xfs xfs: new code for 6.18 2025-09-29 14:35:44 -07:00
zonefs zonefs: correct some spelling mistakes 2025-08-12 11:59:27 +09:00
aio.c Summary of significant series in this pull request: 2025-10-02 18:18:33 -07:00
anon_inodes.c module: Rename EXPORT_SYMBOL_GPL_FOR_MODULES to EXPORT_SYMBOL_FOR_MODULES 2025-08-11 16:16:36 +02:00
attr.c vfs: add ATTR_CTIME_SET flag 2025-09-21 19:24:50 -04:00
backing-file.c vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
bad_inode.c
binfmt_elf_fdpic.c execve updates for v6.17 2025-07-28 17:11:40 -07:00
binfmt_elf.c binfmt_elf: preserve original ELF e_flags for core dumps 2025-09-03 20:49:32 -07:00
binfmt_flat.c
binfmt_misc.c binfmt_misc: switch to locked_recursive_removal() 2025-07-02 22:36:51 -04:00
binfmt_script.c
bpf_fs_kfuncs.c bpf...d_path(): constify path argument 2025-09-15 21:17:08 -04:00
buffer.c fs/buffer: fix use-after-free when call bh_read() helper 2025-08-19 13:51:28 +02:00
char_dev.c
compat_binfmt_elf.c
coredump.c Summary of significant series in this pull request: 2025-10-02 18:18:33 -07:00
d_path.c fold fs_struct->{lock,seq} into a seqlock 2025-07-08 10:25:19 +02:00
dax.c fs/dax: use vmf_insert_folio_pmd() to insert the huge zero folio 2025-09-13 16:54:51 -07:00
dcache.c Simplifying ->d_name audits, easy part. 2025-10-03 11:14:02 -07:00
direct-io.c Summary of significant series in this pull request: 2025-07-31 14:57:54 -07:00
drop_caches.c
eventfd.c
eventpoll.c eventpoll: Replace rwlock with spinlock 2025-09-05 15:51:24 +02:00
exec.c Summary of significant series in this pull request: 2025-10-02 18:18:33 -07:00
fcntl.c fcntl: trim arguments 2025-09-26 10:21:23 +02:00
fhandle.c namespace-6.18-rc1 2025-09-29 11:20:29 -07:00
file_attr.c fs: tighten a sanity check in file_attr_to_fileattr() 2025-07-16 10:22:01 +02:00
file_table.c Have cc(1) catch attempts to modify ->f_path 2025-09-27 20:18:41 -04:00
file.c fs: always return zero on success from replace_fd() 2025-08-11 14:52:25 +02:00
filesystems.c
fs_context.c change the calling conventions for vfs_parse_fs_string() 2025-09-04 15:20:51 -04:00
fs_parser.c
fs_pin.c
fs_struct.c fold fs_struct->{lock,seq} into a seqlock 2025-07-08 10:25:19 +02:00
fs_types.c
fs-writeback.c vfs-6.18-rc1.writeback 2025-09-29 11:34:40 -07:00
fsopen.c fscontext: do not consume log entries when returning -EMSGSIZE 2025-08-11 14:52:41 +02:00
init.c VFS: rename kern_path_locked() and related functions. 2025-09-23 12:37:36 +02:00
inode.c vfs-6.18-rc1.inode 2025-09-29 09:42:30 -07:00
internal.h file->f_path constification 2025-10-03 16:32:36 -07:00
ioctl.c fs: remove vfs_ioctl export 2025-09-01 13:08:01 +02:00
Kconfig Summary of significant series in this pull request: 2025-10-02 18:18:33 -07:00
Kconfig.binfmt binfmt_elf: preserve original ELF e_flags for core dumps 2025-09-03 20:49:32 -07:00
kernel_read_file.c
libfs.c vfs-6.17-rc1.pidfs 2025-07-28 14:10:15 -07:00
locks.c locks: Remove the last reference to EXPORT_OP_ASYNC_LOCK. 2025-08-11 14:52:24 +02:00
Makefile Remove bcachefs core code 2025-09-29 13:43:52 -07:00
mbcache.c
mnt_idmapping.c
mount.h mount-related stuff for this cycle 2025-10-03 10:19:44 -07:00
mpage.c mpage: convert do_mpage_readpage() to return void type 2025-09-21 14:22:16 -07:00
namei.c file->f_path constification 2025-10-03 16:32:36 -07:00
namespace.c vfs_parse_fs_string() stuff 2025-10-03 10:51:44 -07:00
nsfs.c file->f_path constification 2025-10-03 16:32:36 -07:00
open.c file->f_path constification 2025-10-03 16:32:36 -07:00
pidfs.c pidfd: add a new supported_mask field 2025-10-30 14:25:13 +01:00
pipe.c Add RWF_NOSIGNAL flag for pwritev2 2025-08-29 15:08:07 +02:00
pnode.c umount_tree(): take all victims out of propagation graph at once 2025-09-15 21:26:44 -04:00
pnode.h umount_tree(): take all victims out of propagation graph at once 2025-09-15 21:26:44 -04:00
posix_acl.c
proc_namespace.c
read_write.c copy_file_range: limit size if in compat mode 2025-08-15 16:11:47 +02:00
readdir.c
remap_range.c
select.c fs: annotate suspected data race between poll_schedule_timeout() and pollwake() 2025-06-23 12:36:51 +02:00
seq_file.c
signalfd.c
splice.c netfs: Fix unbuffered write error handling 2025-08-15 15:56:49 +02:00
stack.c docs/vfs: update references to i_mutex to i_rwsem 2025-06-23 12:17:33 +02:00
stat.c constify path argument of vfs_statx_path() 2025-09-15 21:17:07 -04:00
statfs.c
super.c mount-related stuff for this cycle 2025-10-03 10:19:44 -07:00
sync.c
sysctls.c
timerfd.c
userfaultfd.c mm/mremap: use an explicit uffd failure path for mremap 2025-07-24 19:12:29 -07:00
utimes.c
xattr.c vfs-6.17-rc1.misc 2025-07-28 11:22:56 -07:00