user/sven/linux.git/include/linux/fs.h, branch v6.16.3

Merge tag 'vfs-6.16-rc5.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

2025-07-04T16:06:49Z

Pull vfs fixes from Christian Brauner: - Fix a regression caused by the anonymous inode rework. Making them regular files causes various places in the kernel to tip over starting with io_uring. Revert to the former status quo and port our assertion to be based on checking the inode so we don't lose the valuable VFS_*_ON_*() assertions that have already helped discover weird behavior our outright bugs. - Fix the the upper bound calculation in fuse_fill_write_pages() - Fix priority inversion issues in the eventpoll code - Make secretmen use anon_inode_make_secure_inode() to avoid bypassing the LSM layer - Fix a netfs hang due to missing case in final DIO read result collection - Fix a double put of the netfs_io_request struct - Provide some helpers to abstract out NETFS_RREQ_IN_PROGRESS flag wrangling - Fix infinite looping in netfs_wait_for_pause/request() - Fix a netfs ref leak on an extra subrequest inserted into a request's list of subreqs - Fix various cifs RPC callbacks to set NETFS_SREQ_NEED_RETRY if a subrequest fails retriably - Fix a cifs warning in the workqueue code when reconnecting a channel - Fix the updating of i_size in netfs to avoid a race between testing if we should have extended the file with a DIO write and changing i_size - Merge the places in netfs that update i_size on write - Fix coredump socket selftests * tag 'vfs-6.16-rc5.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: anon_inode: rework assertions netfs: Update tracepoints in a number of ways netfs: Renumber the NETFS_RREQ_* flags to make traces easier to read netfs: Merge i_size update functions netfs: Fix i_size updating smb: client: set missing retry flag in cifs_writev_callback() smb: client: set missing retry flag in cifs_readv_callback() smb: client: set missing retry flag in smb2_writev_callback() netfs: Fix ref leak on inserted extra subreq in write retry netfs: Fix looping in wait functions netfs: Provide helpers to perform NETFS_RREQ_IN_PROGRESS flag wangling netfs: Fix double put of request netfs: Fix hang due to missing case in final DIO read result collection eventpoll: Fix priority inversion problem fuse: fix fuse_fill_write_pages() upper bound calculation fs: export anon_inode_make_secure_inode() and fix secretmem LSM bypass selftests/coredump: Fix "socket_detect_userspace_client" test failure

fs: export anon_inode_make_secure_inode() and fix secretmem LSM bypass

2025-06-23T10:41:17Z

Export anon_inode_make_secure_inode() to allow KVM guest_memfd to create anonymous inodes with proper security context. This replaces the current pattern of calling alloc_anon_inode() followed by inode_init_security_anon() for creating security context manually. This change also fixes a security regression in secretmem where the S_PRIVATE flag was not cleared after alloc_anon_inode(), causing LSM/SELinux checks to be bypassed for secretmem file descriptors. As guest_memfd currently resides in the KVM module, we need to export this symbol for use outside the core kernel. In the future, guest_memfd might be moved to core-mm, at which point the symbols no longer would have to be exported. When/if that happens is still unclear. Fixes: 2bfe15c52612 ("mm: create security context for memfd_secret inodes") Suggested-by: David Hildenbrand Suggested-by: Mike Rapoport Signed-off-by: Shivank Garg Link: https://lore.kernel.org/20250620070328.803704-3-shivankg@amd.com Acked-by: "Mike Rapoport (Microsoft)" Signed-off-by: Christian Brauner

Merge tag 'vfs-6.16-rc3.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

2025-06-16T15:18:43Z

Pull vfs fixes from Christian Brauner: - Fix a regression in overlayfs caused by reworking the lookup_one*() set of helpers - Make sure that the name of the dentry is printed in overlayfs' mkdir() helper - Add missing iocb values to TRACE_IOCB_STRINGS define - Unlock the superblock during iterate_supers_type(). This was an accidental internal api change - Drop a misleading assert in file_seek_cur_needs_f_lock() helper - Never refuse to return PIDFD_GET_INGO when parent pid is zero That can trivially happen in container scenarios where the parent process might be located in an ancestor pid namespace - Don't revalidate in try_lookup_noperm() as that causes regression for filesystems such as cifs - Fix simple_xattr_list() and reset the err variable after security_inode_listsecurity() got called so as not to confuse userspace about the length of the xattr * tag 'vfs-6.16-rc3.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: fs: drop assert in file_seek_cur_needs_f_lock fs: unlock the superblock during iterate_supers_type ovl: fix debug print in case of mkdir error VFS: change try_lookup_noperm() to skip revalidation fs: add missing values to TRACE_IOCB_STRINGS fs/xattr.c: fix simple_xattr_list() ovl: fix regression caused by lookup helpers API changes pidfs: never refuse ppid == 0 in PIDFD_GET_INFO

mm: add mmap_prepare() compatibility layer for nested file systems

2025-06-13T04:39:02Z

Nested file systems, that is those which invoke call_mmap() within their own f_op->mmap() handlers, may encounter underlying file systems which provide the f_op->mmap_prepare() hook introduced by commit c84bf6dd2b83 ("mm: introduce new .mmap_prepare() file callback"). We have a chicken-and-egg scenario here - until all file systems are converted to using .mmap_prepare(), we cannot convert these nested handlers, as we can't call f_op->mmap from an .mmap_prepare() hook. So we have to do it the other way round - invoke the .mmap_prepare() hook from an .mmap() one. in order to do so, we need to convert VMA state into a struct vm_area_desc descriptor, invoking the underlying file system's f_op->mmap_prepare() callback passing a pointer to this, and then setting VMA state accordingly and safely. This patch achieves this via the compat_vma_mmap_prepare() function, which we invoke from call_mmap() if f_op->mmap_prepare() is specified in the passed in file pointer. We place the fundamental logic into mm/vma.h where VMA manipulation belongs. We also update the VMA userland tests to accommodate the changes. The compat_vma_mmap_prepare() function and its associated machinery is temporary, and will be removed once the conversion of file systems is complete. We carefully place this code so it can be used with CONFIG_MMU and also with cutting edge nommu silicon. [akpm@linux-foundation.org: export compat_vma_mmap_prepare tp fix build] [lorenzo.stoakes@oracle.com: remove unused declarations] Link: https://lkml.kernel.org/r/ac3ae324-4c65-432a-8c6d-2af988b18ac8@lucifer.local Link: https://lkml.kernel.org/r/20250609165749.344976-1-lorenzo.stoakes@oracle.com Fixes: c84bf6dd2b83 ("mm: introduce new .mmap_prepare() file callback"). Signed-off-by: Lorenzo Stoakes Reported-by: Jann Horn Closes: https://lore.kernel.org/linux-mm/CAG48ez04yOEVx1ekzOChARDDBZzAKwet8PEoPM4Ln3_rk91AzQ@mail.gmail.com/ Reviewed-by: Pedro Falcato Reviewed-by: Vlastimil Babka Cc: Al Viro Cc: Christian Brauner Cc: Jan Kara Cc: Jann Horn Cc: Liam Howlett Signed-off-by: Andrew Morton

fs: add missing values to TRACE_IOCB_STRINGS

2025-06-11T10:02:15Z

Make sure all values are covered. Signed-off-by: Christoph Hellwig Link: https://lore.kernel.org/20250610140020.2227932-1-hch@lst.de Signed-off-by: Christian Brauner

Merge tag 'vfs-6.16-rc2.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

2025-06-02T19:49:16Z

Pull vfs fixes from Christian Brauner: - Fix the AT_HANDLE_CONNECTABLE option so filesystems that don't know how to decode a connected non-dir dentry fail the request - Use repr(transparent) to ensure identical layout between the C and Rust implementation of struct file - Add a missing xas_pause() into the dax code employing wait_entry_unlocked_exclusive() - Fix FOP_DONTCACHE which we disabled for v6.15. A folio could get redirtied and/or scheduled for writeback after the initial dropbehind test. Change the test accordingly to handle these cases so we can re-enable FOP_DONTCACHE again * tag 'vfs-6.16-rc2.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: exportfs: require ->fh_to_parent() to encode connectable file handles rust: file: improve safety comments rust: file: mark `LocalFile` as `repr(transparent)` fs/dax: Fix "don't skip locked entries when scanning entries" iomap: don't lose folio dropbehind state for overwrites mm/filemap: unify dropbehind flag testing and clearing mm/filemap: unify read/write dropbehind naming Revert "Disable FOP_DONTCACHE for now due to bugs" mm/filemap: use filemap_end_dropbehind() for read invalidation mm/filemap: gate dropbehind invalidate on folio !dirty && !writeback

Merge tag 'mm-stable-2025-05-31-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2025-05-31T22:44:16Z

Pull MM updates from Andrew Morton: - "Add folio_mk_pte()" from Matthew Wilcox simplifies the act of creating a pte which addresses the first page in a folio and reduces the amount of plumbing which architecture must implement to provide this. - "Misc folio patches for 6.16" from Matthew Wilcox is a shower of largely unrelated folio infrastructure changes which clean things up and better prepare us for future work. - "memory,x86,acpi: hotplug memory alignment advisement" from Gregory Price adds early-init code to prevent x86 from leaving physical memory unused when physical address regions are not aligned to memory block size. - "mm/compaction: allow more aggressive proactive compaction" from Michal Clapinski provides some tuning of the (sadly, hard-coded (more sadly, not auto-tuned)) thresholds for our invokation of proactive compaction. In a simple test case, the reduction of a guest VM's memory consumption was dramatic. - "Minor cleanups and improvements to swap freeing code" from Kemeng Shi provides some code cleaups and a small efficiency improvement to this part of our swap handling code. - "ptrace: introduce PTRACE_SET_SYSCALL_INFO API" from Dmitry Levin adds the ability for a ptracer to modify syscalls arguments. At this time we can alter only "system call information that are used by strace system call tampering, namely, syscall number, syscall arguments, and syscall return value. This series should have been incorporated into mm.git's "non-MM" branch, but I goofed. - "fs/proc: extend the PAGEMAP_SCAN ioctl to report guard regions" from Andrei Vagin extends the info returned by the PAGEMAP_SCAN ioctl against /proc/pid/pagemap. This permits CRIU to more efficiently get at the info about guard regions. - "Fix parameter passed to page_mapcount_is_type()" from Gavin Shan implements that fix. No runtime effect is expected because validate_page_before_insert() happens to fix up this error. - "kernel/events/uprobes: uprobe_write_opcode() rewrite" from David Hildenbrand basically brings uprobe text poking into the current decade. Remove a bunch of hand-rolled implementation in favor of using more current facilities. - "mm/ptdump: Drop assumption that pxd_val() is u64" from Anshuman Khandual provides enhancements and generalizations to the pte dumping code. This might be needed when 128-bit Page Table Descriptors are enabled for ARM. - "Always call constructor for kernel page tables" from Kevin Brodsky ensures that the ctor/dtor is always called for kernel pgtables, as it already is for user pgtables. This permits the addition of more functionality such as "insert hooks to protect page tables". This change does result in various architectures performing unnecesary work, but this is fixed up where it is anticipated to occur. - "Rust support for mm_struct, vm_area_struct, and mmap" from Alice Ryhl adds plumbing to permit Rust access to core MM structures. - "fix incorrectly disallowed anonymous VMA merges" from Lorenzo Stoakes takes advantage of some VMA merging opportunities which we've been missing for 15 years. - "mm/madvise: batch tlb flushes for MADV_DONTNEED and MADV_FREE" from SeongJae Park optimizes process_madvise()'s TLB flushing. Instead of flushing each address range in the provided iovec, we batch the flushing across all the iovec entries. The syscall's cost was approximately halved with a microbenchmark which was designed to load this particular operation. - "Track node vacancy to reduce worst case allocation counts" from Sidhartha Kumar makes the maple tree smarter about its node preallocation. stress-ng mmap performance increased by single-digit percentages and the amount of unnecessarily preallocated memory was dramaticelly reduced. - "mm/gup: Minor fix, cleanup and improvements" from Baoquan He removes a few unnecessary things which Baoquan noted when reading the code. - ""Enhance sysfs handling for memory hotplug in weighted interleave" from Rakie Kim "enhances the weighted interleave policy in the memory management subsystem by improving sysfs handling, fixing memory leaks, and introducing dynamic sysfs updates for memory hotplug support". Fixes things on error paths which we are unlikely to hit. - "mm/damon: auto-tune DAMOS for NUMA setups including tiered memory" from SeongJae Park introduces new DAMOS quota goal metrics which eliminate the manual tuning which is required when utilizing DAMON for memory tiering. - "mm/vmalloc.c: code cleanup and improvements" from Baoquan He provides cleanups and small efficiency improvements which Baoquan found via code inspection. - "vmscan: enforce mems_effective during demotion" from Gregory Price changes reclaim to respect cpuset.mems_effective during demotion when possible. because presently, reclaim explicitly ignores cpuset.mems_effective when demoting, which may cause the cpuset settings to violated. This is useful for isolating workloads on a multi-tenant system from certain classes of memory more consistently. - "Clean up split_huge_pmd_locked() and remove unnecessary folio pointers" from Gavin Guo provides minor cleanups and efficiency gains in in the huge page splitting and migrating code. - "Use kmem_cache for memcg alloc" from Huan Yang creates a slab cache for `struct mem_cgroup', yielding improved memory utilization. - "add max arg to swappiness in memory.reclaim and lru_gen" from Zhongkun He adds a new "max" argument to the "swappiness=" argument for memory.reclaim MGLRU's lru_gen. This directs proactive reclaim to reclaim from only anon folios rather than file-backed folios. - "kexec: introduce Kexec HandOver (KHO)" from Mike Rapoport is the first step on the path to permitting the kernel to maintain existing VMs while replacing the host kernel via file-based kexec. At this time only memblock's reserve_mem is preserved. - "mm: Introduce for_each_valid_pfn()" from David Woodhouse provides and uses a smarter way of looping over a pfn range. By skipping ranges of invalid pfns. - "sched/numa: Skip VMA scanning on memory pinned to one NUMA node via cpuset.mems" from Libo Chen removes a lot of pointless VMA scanning when a task is pinned a single NUMA mode. Dramatic performance benefits were seen in some real world cases. - "JFS: Implement migrate_folio for jfs_metapage_aops" from Shivank Garg addresses a warning which occurs during memory compaction when using JFS. - "move all VMA allocation, freeing and duplication logic to mm" from Lorenzo Stoakes moves some VMA code from kernel/fork.c into the more appropriate mm/vma.c. - "mm, swap: clean up swap cache mapping helper" from Kairui Song provides code consolidation and cleanups related to the folio_index() function. - "mm/gup: Cleanup memfd_pin_folios()" from Vishal Moola does that. - "memcg: Fix test_memcg_min/low test failures" from Waiman Long addresses some bogus failures which are being reported by the test_memcontrol selftest. - "eliminate mmap() retry merge, add .mmap_prepare hook" from Lorenzo Stoakes commences the deprecation of file_operations.mmap() in favor of the new file_operations.mmap_prepare(). The latter is more restrictive and prevents drivers from messing with things in ways which, amongst other problems, may defeat VMA merging. - "memcg: decouple memcg and objcg stocks"" from Shakeel Butt decouples the per-cpu memcg charge cache from the objcg's one. This is a step along the way to making memcg and objcg charging NMI-safe, which is a BPF requirement. - "mm/damon: minor fixups and improvements for code, tests, and documents" from SeongJae Park is yet another batch of miscellaneous DAMON changes. Fix and improve minor problems in code, tests and documents. - "memcg: make memcg stats irq safe" from Shakeel Butt converts memcg stats to be irq safe. Another step along the way to making memcg charging and stats updates NMI-safe, a BPF requirement. - "Let unmap_hugepage_range() and several related functions take folio instead of page" from Fan Ni provides folio conversions in the hugetlb code. * tag 'mm-stable-2025-05-31-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (285 commits) mm: pcp: increase pcp->free_count threshold to trigger free_high mm/hugetlb: convert use of struct page to folio in __unmap_hugepage_range() mm/hugetlb: refactor __unmap_hugepage_range() to take folio instead of page mm/hugetlb: refactor unmap_hugepage_range() to take folio instead of page mm/hugetlb: pass folio instead of page to unmap_ref_private() memcg: objcg stock trylock without irq disabling memcg: no stock lock for cpu hot-unplug memcg: make __mod_memcg_lruvec_state re-entrant safe against irqs memcg: make count_memcg_events re-entrant safe against irqs memcg: make mod_memcg_state re-entrant safe against irqs memcg: move preempt disable to callers of memcg_rstat_updated memcg: memcg_rstat_updated re-entrant safe against irqs mm: khugepaged: decouple SHMEM and file folios' collapse selftests/eventfd: correct test name and improve messages alloc_tag: check mem_profiling_support in alloc_tag_init Docs/damon: update titles and brief introductions to explain DAMOS selftests/damon/_damon_sysfs: read tried regions directories in order mm/damon/tests/core-kunit: add a test for damos_set_filters_default_reject() mm/damon/paddr: remove unused variable, folio_list, in damon_pa_stat() mm/damon/sysfs-schemes: fix wrong comment on damons_sysfs_quota_goal_metric_strs ...

Merge tag 'pull-automount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2025-05-30T22:38:29Z

Pull automount updates from Al Viro: "Automount wart removal A bunch of odd boilerplate gone from instances - the reason for those was the need to protect the yet-to-be-attched mount from mark_mounts_for_expiry() deciding to take it out. But that's easy to detect and take care of in mark_mounts_for_expiry() itself; no need to have every instance simulate mount being busy by grabbing an extra reference to it, with finish_automount() undoing that once it attaches that mount. Should've done it that way from the very beginning... This is a flagday change, thankfully there are very few instances. vfs_submount() is gone - its sole remaining user (trace_automount) had been switched to saner primitives" * tag 'pull-automount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: kill vfs_submount() saner calling conventions for ->d_automount()

Revert "Disable FOP_DONTCACHE for now due to bugs"

2025-05-27T19:06:24Z

This reverts commit 478ad02d6844217cc7568619aeb0809d93ade43d. Both the read and write side dirty && writeback races should be resolved now, revert the commit that disabled FOP_DONTCACHE for filesystems. Link: https://lore.kernel.org/linux-fsdevel/20250525083209.GS2023217@ZenIV/ Signed-off-by: Jens Axboe Link: https://lore.kernel.org/20250527133255.452431-4-axboe@kernel.dk Signed-off-by: Christian Brauner

Merge tag 'xfs-merge-6.16' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

2025-05-26T19:56:01Z

Pull xfs updates from Carlos Maiolino: - Atomic writes for XFS - Remove experimental warnings for pNFS, scrub and parent pointers * tag 'xfs-merge-6.16' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (26 commits) xfs: add inode to zone caching for data placement xfs: free the item in xfs_mru_cache_insert on failure xfs: remove the EXPERIMENTAL warning for pNFS xfs: remove some EXPERIMENTAL warnings xfs: Remove deprecated xfs_bufd sysctl parameters xfs: stop using set_blocksize xfs: allow sysadmins to specify a maximum atomic write limit at mount time xfs: update atomic write limits xfs: add xfs_calc_atomic_write_unit_max() xfs: add xfs_file_dio_write_atomic() xfs: commit CoW-based atomic writes atomically xfs: add large atomic writes checks in xfs_direct_write_iomap_begin() xfs: add xfs_atomic_write_cow_iomap_begin() xfs: refine atomic write size check in xfs_file_write_iter() xfs: refactor xfs_reflink_end_cow_extent() xfs: allow block allocator to take an alignment hint xfs: ignore HW which cannot atomic write a single block xfs: add helpers to compute transaction reservation for finishing intent items xfs: add helpers to compute log item overhead xfs: separate out setting buftarg atomic writes limits ...