[GIT PULL 12/18 for v7.3] vfs misc
Christian Brauner <[email protected]>
| Newsgroups | org.kernel.vger.linux-fsdevel,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <20260814-vfs-7.3-rc1.misc-abaa1db7ff94@brauner> |
Hey Linus, /* Summary */ - The lockref dead-count handling is tidied up. The open-coded check for a count below zero as the dead marker relies on information the caller should not have. - make put_mnt_ns() leave mounts connected. Destroying a mount namespace disconnected its mounts from their mount points. So a file descriptor still open on the parent of a mount point could be used to peek under it. Locked mounts were already kept connected to prevent exactly that. But a mount is only locked when its tree is copied across a user namespace boundary. So a mount namespace set up by a privileged component had no locked mounts and its mounts were disconnected. Passing UMOUNT_CONNECTED keeps every mount connected and prevents that bug. - vfs_prepare_mode() passes S_IFDIR for directories. I meant to fix that ago but didn't get to it. So now someone finally did it. That kills the exception where the could be 0 when a directory was created whereas every other creation operation passed it explicitly already. - move long delayed work for ufs, jffs2, hfsplus, hfs and affs from the per-cpu system_long_wq to the new unbound system_dfl_long_wq. None of that work relies on per-cpu state and the work item is enqueued with queue_delayed_work() whose timer is global anyway. So it may as well benefit from scheduler task placement. /* Smaller fixes and cleanups */ - unlock_buffer() and journal_end_buffer_io_sync() use clear_and_wake_up_bit() - the pipe page pools are unified into a single per-pipe pool and the extra wake_up(rd_wait) is limited to EPOLLET consumers - eventpoll now computes its timer slack lazily in ep_poll() - shrink_dcache_for_umount() keeps making progress on busy roots - excess xarray nodes are freed in clear_inode() - romfs detects hard link cycles - the user path of nested backing files is fixed - pidfd holds exec_update_lock around the namespace ioctl - non-memcg-aware nr_cached_objects is skipped during memcg slab shrink - iomap_write_iter() always returns status - mangle_path() is renamed to seq_mangle_path() - inode timestamp accessors are annotated - new regression test for pipe->poll_usage. - a few documentation, kernel-doc and selftest fixes /* Testing */ No build failures or warnings were observed. /* Conflicts */ Merge conflicts with mainline ============================= No known conflicts. Merge conflicts with other trees ================================ [1]: https://lore.kernel.org/linux-next/[email protected] This conflicts with the gfs2 tree in two places. Both are caused by commit 91e27ed8a387c ("lockref: tidy up dead count handling") from this tree, which renames __lockref_is_dead() to lockref_is_dead() and converts all callers, including the ones in gfs2. The first conflict is in fs/gfs2/glock.c against commit da26828b82a45 ("gfs2: Remove the glock lru list and shrinker"). Reported in [1]. [2]: https://lore.kernel.org/linux-next/[email protected] The second conflict is in fs/gfs2/lock_dlm.c against commit 657e5af4fe0b9 ("gfs2: harden gfs2_glock_hold"). The following changes since commit dc59e4fea9d83f03bad6bddf3fa2e52491777482: Linux 7.2-rc1 (2026-06-28 12:01:31 -0700) are available in the Git repository at: [email protected]:pub/scm/linux/kernel/git/vfs/vfs tags/vfs-7.3-rc1.misc for you to fetch changes up to dcacab904fe78d60840ba947a104993ee9ded887: selftests/namespaces: Fix racy pipe handshake in timens and pidns_separate (2026-08-13 12:20:42 +0200) ---------------------------------------------------------------- vfs-7.3-rc1.misc Please consider pulling these changes from the signed vfs-7.3-rc1.misc tag. Thanks! Christian ---------------------------------------------------------------- Agatha Isabelle Moreira (2): fs: buffer: use clear_and_wake_up_bit() in unlock_buffer() fs: jbd2: use clear_and_wake_up_bit() in journal_end_buffer_io_sync() Amin Vakil (1): selftests: proc: include fcntl.h in proc-pidns Baokun Li (1): fs: fix user path of nested backing files Ben Dooks (1): fs: nullfs should include mount.h Breno Leitao (1): fs/pipe: unify the page pools into a single per-pipe pool Brian Foster (1): iomap: always return status from iomap_write_iter Chen Linxuan (1): pidfd: hold exec_update_lock around namespace ioctl Christian Brauner (5): Merge patch series "fs: refactor code to use clear_and_wake_up_bit()" Merge patch series "vfs: pass S_IFDIR mode to vfs_prepare_mode()" Merge patch series "fs: Move long delayed work on system_dfl_long_wq" Merge patch series "put_mnt_ns(): leave mounts connected" Merge patch series "lockref tidy ups + touch ups to it's usage by dcache" Jann Horn (1): fs: document semantics of kstat::{uid,gid} fields Johannes Berg (1): seq_file: rename mangle_path to seq_mangle_path Jori Koolstra (31): vfs: pass S_IFDIR mode to vfs_prepare_mode() 9p: drop redundant S_IFDIR from mkdir affs: drop redundant S_IFDIR from mkdir afs: drop redundant S_IFDIR from mkdir autofs: drop redundant S_IFDIR from mkdir btrfs: drop redundant S_IFDIR from mkdir ceph: drop redundant S_IFDIR from mkdir ext2: drop redundant S_IFDIR from mkdir ext4: drop redundant S_IFDIR from mkdir f2fs: drop redundant S_IFDIR from mkdir gfs2: drop redundant S_IFDIR from mkdir hfs: drop redundant S_IFDIR from mkdir hfsplus: drop redundant S_IFDIR from mkdir hpfs: drop redundant S_IFDIR from mkdir hugetlbfs: drop redundant S_IFDIR from mkdir jffs2: drop redundant S_IFDIR from mkdir jfs: drop redundant S_IFDIR from mkdir minix: drop redundant S_IFDIR from mkdir nilfs2: drop redundant S_IFDIR from mkdir ntfs3: drop redundant S_IFDIR from mkdir ocfs2: drop redundant S_IFDIR from mkdir ocfs2: dlmfs: drop redundant S_IFDIR from mkdir omfs: drop redundant S_IFDIR from mkdir orangefs: drop redundant S_IFDIR from mkdir ramfs: drop redundant S_IFDIR from mkdir udf: drop redundant S_IFDIR from mkdir ufs: drop redundant S_IFDIR from mkdir nfs: drop redundant S_IFDIR from mkdir ubifs: drop redundant S_IFDIR from mkdir xfs: drop redundant S_IFDIR from mkdir ntfs: drop redundant S_IFDIR from mkdir Karl Mehltretter (1): dcache: keep shrink_dcache_for_umount() making progress on busy roots Luis Henriques (1): posix_acl: remove useless code Malaya Kumar Rout (1): selftests/statmount: Fix file descriptor leak in setup_namespace Manush Prajwal (1): fs: fix switch/case indentation in sysfs() syscall Marco Crivellari (5): ufs: Move long delayed work on system_dfl_long_wq fs/jffs2: Move long delayed work on system_dfl_long_wq hfsplus: Move long delayed work on system_dfl_long_wq hfs: Move long delayed work on system_dfl_long_wq affs: Move long delayed work on system_dfl_long_wq Mateusz Guzik (2): lockref: tidy up dead count handling dcache: use lockref routines for dead count checks Matthew Wilcox (Oracle) (1): fs: Free any excess xarray nodes in clear_inode() Noah Orlando (2): put_mnt_ns(): leave mounts connected selftests/filesystems: add mntns cleanup test Oleg Nesterov (2): pipe: only enable the extra wake_up(rd_wait) for EPOLLET consumers selftests/epoll: add a regression test for pipe->poll_usage Randy Dunlap (1): nstree: add/fix struct ns_id_req kernel-doc member fields Ricardo B. Marlière (SUSE) (1): selftests/namespaces: Fix racy pipe handshake in timens and pidns_separate Shivank Sharma (1): initramfs: fix typo in reserve_initrd_mem comment Usama Arif (2): fs/super: skip non-memcg-aware nr_cached_objects in memcg slab shrink eventpoll: compute timer slack lazily in ep_poll() Wang Yan (1): selftests/filesystems: fix spelling error in statmount test comment Yichong Chen (1): fs: remove stale inode_insert5() kernel-doc parameter Yu Peng (1): fs: annotate inode timestamp accessors Yuhong Cheng (1): docs: filesystems: porting: fix spelling of returned and instead 이상호 (1): romfs: detect hard link cycles Documentation/filesystems/porting.rst | 2 +- fs/9p/vfs_inode.c | 2 +- fs/9p/vfs_inode_dotl.c | 1 - fs/affs/namei.c | 2 +- fs/affs/super.c | 2 +- fs/afs/dir.c | 2 +- fs/autofs/root.c | 2 +- fs/backing-file.c | 2 +- fs/btrfs/inode.c | 2 +- fs/ceph/dir.c | 3 +- fs/coda/dir.c | 7 +- fs/dcache.c | 23 ++- fs/erofs/zdata.c | 4 +- fs/eventpoll.c | 6 +- fs/ext2/namei.c | 2 +- fs/ext4/namei.c | 2 +- fs/f2fs/namei.c | 2 +- fs/filesystems.c | 18 +- fs/fuse/dir.c | 8 + fs/gfs2/glock.c | 6 +- fs/gfs2/inode.c | 2 +- fs/gfs2/lock_dlm.c | 6 +- fs/gfs2/quota.c | 4 +- fs/hfs/dir.c | 2 +- fs/hfs/super.c | 2 +- fs/hfsplus/dir.c | 2 +- fs/hfsplus/super.c | 2 +- fs/hpfs/namei.c | 4 +- fs/hugetlbfs/inode.c | 2 +- fs/inode.c | 42 ++--- fs/iomap/buffered-io.c | 4 +- fs/jffs2/dir.c | 2 - fs/jffs2/wbuf.c | 2 +- fs/jfs/namei.c | 2 +- fs/minix/namei.c | 2 +- fs/namei.c | 7 +- fs/namespace.c | 2 +- fs/nfs/dir.c | 2 +- fs/nilfs2/namei.c | 2 +- fs/ntfs/namei.c | 2 +- fs/ntfs3/namei.c | 2 +- fs/nullfs.c | 2 + fs/ocfs2/dlmfs/dlmfs.c | 2 +- fs/ocfs2/namei.c | 2 +- fs/omfs/dir.c | 2 +- fs/orangefs/namei.c | 2 +- fs/pidfs.c | 43 +++-- fs/pipe.c | 191 ++++++++++----------- fs/posix_acl.c | 2 - fs/ramfs/inode.c | 2 +- fs/romfs/super.c | 8 + fs/seq_file.c | 11 +- fs/smb/client/inode.c | 7 + fs/stat.c | 2 +- fs/super.c | 19 +- fs/ubifs/dir.c | 2 +- fs/udf/namei.c | 2 +- fs/ufs/namei.c | 2 +- fs/ufs/super.c | 2 +- fs/xfs/xfs_buf.c | 4 +- fs/xfs/xfs_iops.c | 2 +- fs/xfs/xfs_qm.c | 4 +- include/linux/fs.h | 20 +-- include/linux/lockref.h | 12 +- include/linux/pipe_fs_i.h | 26 ++- include/linux/seq_file.h | 2 +- include/linux/stat.h | 4 +- include/uapi/linux/nsfs.h | 7 +- init/initramfs.c | 2 +- lib/lockref.c | 2 +- lib/seq_buf.c | 2 +- tools/testing/selftests/Makefile | 1 + .../filesystems/epoll/epoll_wakeup_test.c | 23 +++ .../selftests/filesystems/mntns_cleanup/.gitignore | 2 + .../selftests/filesystems/mntns_cleanup/Makefile | 6 + .../filesystems/mntns_cleanup/mntns_cleanup_test.c | 58 +++++++ .../filesystems/statmount/statmount_test.c | 5 +- tools/testing/selftests/namespaces/nsid_test.c | 4 - tools/testing/selftests/proc/proc-pidns.c | 1 + 79 files changed, 419 insertions(+), 266 deletions(-) create mode 100644 tools/testing/selftests/filesystems/mntns_cleanup/.gitignore create mode 100644 tools/testing/selftests/filesystems/mntns_cleanup/Makefile create mode 100644 tools/testing/selftests/filesystems/mntns_cleanup/mntns_cleanup_test.c