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Author SHA1 Message Date
Linus Torvalds
fbc90c042c - 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN 
walkers") is known to cause a performance regression
   (https://lore.kernel.org/all/3acefad9-96e5-4681-8014-827d6be71c7a@linux.ibm.com/T/#mfa809800a7862fb5bdf834c6f71a3a5113eb83ff).
   Yu has a fix which I'll send along later via the hotfixes branch.
 
 - In the series "mm: Avoid possible overflows in dirty throttling" Jan
   Kara addresses a couple of issues in the writeback throttling code.
   These fixes are also targetted at -stable kernels.
 
 - Ryusuke Konishi's series "nilfs2: fix potential issues related to
   reserved inodes" does that.  This should actually be in the
   mm-nonmm-stable tree, along with the many other nilfs2 patches.  My bad.
 
 - More folio conversions from Kefeng Wang in the series "mm: convert to
   folio_alloc_mpol()"
 
 - Kemeng Shi has sent some cleanups to the writeback code in the series
   "Add helper functions to remove repeated code and improve readability of
   cgroup writeback"
 
 - Kairui Song has made the swap code a little smaller and a little
   faster in the series "mm/swap: clean up and optimize swap cache index".
 
 - In the series "mm/memory: cleanly support zeropage in
   vm_insert_page*(), vm_map_pages*() and vmf_insert_mixed()" David
   Hildenbrand has reworked the rather sketchy handling of the use of the
   zeropage in MAP_SHARED mappings.  I don't see any runtime effects here -
   more a cleanup/understandability/maintainablity thing.
 
 - Dev Jain has improved selftests/mm/va_high_addr_switch.c's handling of
   higher addresses, for aarch64.  The (poorly named) series is
   "Restructure va_high_addr_switch".
 
 - The core TLB handling code gets some cleanups and possible slight
   optimizations in Bang Li's series "Add update_mmu_tlb_range() to
   simplify code".
 
 - Jane Chu has improved the handling of our
   fake-an-unrecoverable-memory-error testing feature MADV_HWPOISON in the
   series "Enhance soft hwpoison handling and injection".
 
 - Jeff Johnson has sent a billion patches everywhere to add
   MODULE_DESCRIPTION() to everything.  Some landed in this pull.
 
 - In the series "mm: cleanup MIGRATE_SYNC_NO_COPY mode", Kefeng Wang has
   simplified migration's use of hardware-offload memory copying.
 
 - Yosry Ahmed performs more folio API conversions in his series "mm:
   zswap: trivial folio conversions".
 
 - In the series "large folios swap-in: handle refault cases first",
   Chuanhua Han inches us forward in the handling of large pages in the
   swap code.  This is a cleanup and optimization, working toward the end
   objective of full support of large folio swapin/out.
 
 - In the series "mm,swap: cleanup VMA based swap readahead window
   calculation", Huang Ying has contributed some cleanups and a possible
   fixlet to his VMA based swap readahead code.
 
 - In the series "add mTHP support for anonymous shmem" Baolin Wang has
   taught anonymous shmem mappings to use multisize THP.  By default this
   is a no-op - users must opt in vis sysfs controls.  Dramatic
   improvements in pagefault latency are realized.
 
 - David Hildenbrand has some cleanups to our remaining use of
   page_mapcount() in the series "fs/proc: move page_mapcount() to
   fs/proc/internal.h".
 
 - David also has some highmem accounting cleanups in the series
   "mm/highmem: don't track highmem pages manually".
 
 - Build-time fixes and cleanups from John Hubbard in the series
   "cleanups, fixes, and progress towards avoiding "make headers"".
 
 - Cleanups and consolidation of the core pagemap handling from Barry
   Song in the series "mm: introduce pmd|pte_needs_soft_dirty_wp helpers
   and utilize them".
 
 - Lance Yang's series "Reclaim lazyfree THP without splitting" has
   reduced the latency of the reclaim of pmd-mapped THPs under fairly
   common circumstances.  A 10x speedup is seen in a microbenchmark.
 
   It does this by punting to aother CPU but I guess that's a win unless
   all CPUs are pegged.
 
 - hugetlb_cgroup cleanups from Xiu Jianfeng in the series
   "mm/hugetlb_cgroup: rework on cftypes".
 
 - Miaohe Lin's series "Some cleanups for memory-failure" does just that
   thing.
 
 - Is anyone reading this stuff?  If so, email me!
 
 - Someone other than SeongJae has developed a DAMON feature in Honggyu
   Kim's series "DAMON based tiered memory management for CXL memory".
   This adds DAMON features which may be used to help determine the
   efficiency of our placement of CXL/PCIe attached DRAM.
 
 - DAMON user API centralization and simplificatio work in SeongJae
   Park's series "mm/damon: introduce DAMON parameters online commit
   function".
 
 - In the series "mm: page_type, zsmalloc and page_mapcount_reset()"
   David Hildenbrand does some maintenance work on zsmalloc - partially
   modernizing its use of pageframe fields.
 
 - Kefeng Wang provides more folio conversions in the series "mm: remove
   page_maybe_dma_pinned() and page_mkclean()".
 
 - More cleanup from David Hildenbrand, this time in the series
   "mm/memory_hotplug: use PageOffline() instead of PageReserved() for
   !ZONE_DEVICE".  It "enlightens memory hotplug more about PageOffline()
   pages" and permits the removal of some virtio-mem hacks.
 
 - Barry Song's series "mm: clarify folio_add_new_anon_rmap() and
   __folio_add_anon_rmap()" is a cleanup to the anon folio handling in
   preparation for mTHP (multisize THP) swapin.
 
 - Kefeng Wang's series "mm: improve clear and copy user folio"
   implements more folio conversions, this time in the area of large folio
   userspace copying.
 
 - The series "Docs/mm/damon/maintaier-profile: document a mailing tool
   and community meetup series" tells people how to get better involved
   with other DAMON developers.  From SeongJae Park.
 
 - A large series ("kmsan: Enable on s390") from Ilya Leoshkevich does
   that.
 
 - David Hildenbrand sends along more cleanups, this time against the
   migration code.  The series is "mm/migrate: move NUMA hinting fault
   folio isolation + checks under PTL".
 
 - Jan Kara has found quite a lot of strangenesses and minor errors in
   the readahead code.  He addresses this in the series "mm: Fix various
   readahead quirks".
 
 - SeongJae Park's series "selftests/damon: test DAMOS tried regions and
   {min,max}_nr_regions" adds features and addresses errors in DAMON's self
   testing code.
 
 - Gavin Shan has found a userspace-triggerable WARN in the pagecache
   code.  The series "mm/filemap: Limit page cache size to that supported
   by xarray" addresses this.  The series is marked cc:stable.
 
 - Chengming Zhou's series "mm/ksm: cmp_and_merge_page() optimizations
   and cleanup" cleans up and slightly optimizes KSM.
 
 - Roman Gushchin has separated the memcg-v1 and memcg-v2 code - lots of
   code motion.  The series (which also makes the memcg-v1 code
   Kconfigurable) are
 
   "mm: memcg: separate legacy cgroup v1 code and put under config
   option" and
   "mm: memcg: put cgroup v1-specific memcg data under CONFIG_MEMCG_V1"
 
 - Dan Schatzberg's series "Add swappiness argument to memory.reclaim"
   adds an additional feature to this cgroup-v2 control file.
 
 - The series "Userspace controls soft-offline pages" from Jiaqi Yan
   permits userspace to stop the kernel's automatic treatment of excessive
   correctable memory errors.  In order to permit userspace to monitor and
   handle this situation.
 
 - Kefeng Wang's series "mm: migrate: support poison recover from migrate
   folio" teaches the kernel to appropriately handle migration from
   poisoned source folios rather than simply panicing.
 
 - SeongJae Park's series "Docs/damon: minor fixups and improvements"
   does those things.
 
 - In the series "mm/zsmalloc: change back to per-size_class lock"
   Chengming Zhou improves zsmalloc's scalability and memory utilization.
 
 - Vivek Kasireddy's series "mm/gup: Introduce memfd_pin_folios() for
   pinning memfd folios" makes the GUP code use FOLL_PIN rather than bare
   refcount increments.  So these paes can first be moved aside if they
   reside in the movable zone or a CMA block.
 
 - Andrii Nakryiko has added a binary ioctl()-based API to /proc/pid/maps
   for much faster reading of vma information.  The series is "query VMAs
   from /proc/<pid>/maps".
 
 - In the series "mm: introduce per-order mTHP split counters" Lance Yang
   improves the kernel's presentation of developer information related to
   multisize THP splitting.
 
 - Michael Ellerman has developed the series "Reimplement huge pages
   without hugepd on powerpc (8xx, e500, book3s/64)".  This permits
   userspace to use all available huge page sizes.
 
 - In the series "revert unconditional slab and page allocator fault
   injection calls" Vlastimil Babka removes a performance-affecting and not
   very useful feature from slab fault injection.
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Merge tag 'mm-stable-2024-07-21-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:

 - In the series "mm: Avoid possible overflows in dirty throttling" Jan
   Kara addresses a couple of issues in the writeback throttling code.
   These fixes are also targetted at -stable kernels.

 - Ryusuke Konishi's series "nilfs2: fix potential issues related to
   reserved inodes" does that. This should actually be in the
   mm-nonmm-stable tree, along with the many other nilfs2 patches. My
   bad.

 - More folio conversions from Kefeng Wang in the series "mm: convert to
   folio_alloc_mpol()"

 - Kemeng Shi has sent some cleanups to the writeback code in the series
   "Add helper functions to remove repeated code and improve readability
   of cgroup writeback"

 - Kairui Song has made the swap code a little smaller and a little
   faster in the series "mm/swap: clean up and optimize swap cache
   index".

 - In the series "mm/memory: cleanly support zeropage in
   vm_insert_page*(), vm_map_pages*() and vmf_insert_mixed()" David
   Hildenbrand has reworked the rather sketchy handling of the use of
   the zeropage in MAP_SHARED mappings. I don't see any runtime effects
   here - more a cleanup/understandability/maintainablity thing.

 - Dev Jain has improved selftests/mm/va_high_addr_switch.c's handling
   of higher addresses, for aarch64. The (poorly named) series is
   "Restructure va_high_addr_switch".

 - The core TLB handling code gets some cleanups and possible slight
   optimizations in Bang Li's series "Add update_mmu_tlb_range() to
   simplify code".

 - Jane Chu has improved the handling of our
   fake-an-unrecoverable-memory-error testing feature MADV_HWPOISON in
   the series "Enhance soft hwpoison handling and injection".

 - Jeff Johnson has sent a billion patches everywhere to add
   MODULE_DESCRIPTION() to everything. Some landed in this pull.

 - In the series "mm: cleanup MIGRATE_SYNC_NO_COPY mode", Kefeng Wang
   has simplified migration's use of hardware-offload memory copying.

 - Yosry Ahmed performs more folio API conversions in his series "mm:
   zswap: trivial folio conversions".

 - In the series "large folios swap-in: handle refault cases first",
   Chuanhua Han inches us forward in the handling of large pages in the
   swap code. This is a cleanup and optimization, working toward the end
   objective of full support of large folio swapin/out.

 - In the series "mm,swap: cleanup VMA based swap readahead window
   calculation", Huang Ying has contributed some cleanups and a possible
   fixlet to his VMA based swap readahead code.

 - In the series "add mTHP support for anonymous shmem" Baolin Wang has
   taught anonymous shmem mappings to use multisize THP. By default this
   is a no-op - users must opt in vis sysfs controls. Dramatic
   improvements in pagefault latency are realized.

 - David Hildenbrand has some cleanups to our remaining use of
   page_mapcount() in the series "fs/proc: move page_mapcount() to
   fs/proc/internal.h".

 - David also has some highmem accounting cleanups in the series
   "mm/highmem: don't track highmem pages manually".

 - Build-time fixes and cleanups from John Hubbard in the series
   "cleanups, fixes, and progress towards avoiding "make headers"".

 - Cleanups and consolidation of the core pagemap handling from Barry
   Song in the series "mm: introduce pmd|pte_needs_soft_dirty_wp helpers
   and utilize them".

 - Lance Yang's series "Reclaim lazyfree THP without splitting" has
   reduced the latency of the reclaim of pmd-mapped THPs under fairly
   common circumstances. A 10x speedup is seen in a microbenchmark.

   It does this by punting to aother CPU but I guess that's a win unless
   all CPUs are pegged.

 - hugetlb_cgroup cleanups from Xiu Jianfeng in the series
   "mm/hugetlb_cgroup: rework on cftypes".

 - Miaohe Lin's series "Some cleanups for memory-failure" does just that
   thing.

 - Someone other than SeongJae has developed a DAMON feature in Honggyu
   Kim's series "DAMON based tiered memory management for CXL memory".
   This adds DAMON features which may be used to help determine the
   efficiency of our placement of CXL/PCIe attached DRAM.

 - DAMON user API centralization and simplificatio work in SeongJae
   Park's series "mm/damon: introduce DAMON parameters online commit
   function".

 - In the series "mm: page_type, zsmalloc and page_mapcount_reset()"
   David Hildenbrand does some maintenance work on zsmalloc - partially
   modernizing its use of pageframe fields.

 - Kefeng Wang provides more folio conversions in the series "mm: remove
   page_maybe_dma_pinned() and page_mkclean()".

 - More cleanup from David Hildenbrand, this time in the series
   "mm/memory_hotplug: use PageOffline() instead of PageReserved() for
   !ZONE_DEVICE". It "enlightens memory hotplug more about PageOffline()
   pages" and permits the removal of some virtio-mem hacks.

 - Barry Song's series "mm: clarify folio_add_new_anon_rmap() and
   __folio_add_anon_rmap()" is a cleanup to the anon folio handling in
   preparation for mTHP (multisize THP) swapin.

 - Kefeng Wang's series "mm: improve clear and copy user folio"
   implements more folio conversions, this time in the area of large
   folio userspace copying.

 - The series "Docs/mm/damon/maintaier-profile: document a mailing tool
   and community meetup series" tells people how to get better involved
   with other DAMON developers. From SeongJae Park.

 - A large series ("kmsan: Enable on s390") from Ilya Leoshkevich does
   that.

 - David Hildenbrand sends along more cleanups, this time against the
   migration code. The series is "mm/migrate: move NUMA hinting fault
   folio isolation + checks under PTL".

 - Jan Kara has found quite a lot of strangenesses and minor errors in
   the readahead code. He addresses this in the series "mm: Fix various
   readahead quirks".

 - SeongJae Park's series "selftests/damon: test DAMOS tried regions and
   {min,max}_nr_regions" adds features and addresses errors in DAMON's
   self testing code.

 - Gavin Shan has found a userspace-triggerable WARN in the pagecache
   code. The series "mm/filemap: Limit page cache size to that supported
   by xarray" addresses this. The series is marked cc:stable.

 - Chengming Zhou's series "mm/ksm: cmp_and_merge_page() optimizations
   and cleanup" cleans up and slightly optimizes KSM.

 - Roman Gushchin has separated the memcg-v1 and memcg-v2 code - lots of
   code motion. The series (which also makes the memcg-v1 code
   Kconfigurable) are "mm: memcg: separate legacy cgroup v1 code and put
   under config option" and "mm: memcg: put cgroup v1-specific memcg
   data under CONFIG_MEMCG_V1"

 - Dan Schatzberg's series "Add swappiness argument to memory.reclaim"
   adds an additional feature to this cgroup-v2 control file.

 - The series "Userspace controls soft-offline pages" from Jiaqi Yan
   permits userspace to stop the kernel's automatic treatment of
   excessive correctable memory errors. In order to permit userspace to
   monitor and handle this situation.

 - Kefeng Wang's series "mm: migrate: support poison recover from
   migrate folio" teaches the kernel to appropriately handle migration
   from poisoned source folios rather than simply panicing.

 - SeongJae Park's series "Docs/damon: minor fixups and improvements"
   does those things.

 - In the series "mm/zsmalloc: change back to per-size_class lock"
   Chengming Zhou improves zsmalloc's scalability and memory
   utilization.

 - Vivek Kasireddy's series "mm/gup: Introduce memfd_pin_folios() for
   pinning memfd folios" makes the GUP code use FOLL_PIN rather than
   bare refcount increments. So these paes can first be moved aside if
   they reside in the movable zone or a CMA block.

 - Andrii Nakryiko has added a binary ioctl()-based API to
   /proc/pid/maps for much faster reading of vma information. The series
   is "query VMAs from /proc/<pid>/maps".

 - In the series "mm: introduce per-order mTHP split counters" Lance
   Yang improves the kernel's presentation of developer information
   related to multisize THP splitting.

 - Michael Ellerman has developed the series "Reimplement huge pages
   without hugepd on powerpc (8xx, e500, book3s/64)". This permits
   userspace to use all available huge page sizes.

 - In the series "revert unconditional slab and page allocator fault
   injection calls" Vlastimil Babka removes a performance-affecting and
   not very useful feature from slab fault injection.

* tag 'mm-stable-2024-07-21-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (411 commits)
  mm/mglru: fix ineffective protection calculation
  mm/zswap: fix a white space issue
  mm/hugetlb: fix kernel NULL pointer dereference when migrating hugetlb folio
  mm/hugetlb: fix possible recursive locking detected warning
  mm/gup: clear the LRU flag of a page before adding to LRU batch
  mm/numa_balancing: teach mpol_to_str about the balancing mode
  mm: memcg1: convert charge move flags to unsigned long long
  alloc_tag: fix page_ext_get/page_ext_put sequence during page splitting
  lib: reuse page_ext_data() to obtain codetag_ref
  lib: add missing newline character in the warning message
  mm/mglru: fix overshooting shrinker memory
  mm/mglru: fix div-by-zero in vmpressure_calc_level()
  mm/kmemleak: replace strncpy() with strscpy()
  mm, page_alloc: put should_fail_alloc_page() back behing CONFIG_FAIL_PAGE_ALLOC
  mm, slab: put should_failslab() back behind CONFIG_SHOULD_FAILSLAB
  mm: ignore data-race in __swap_writepage
  hugetlbfs: ensure generic_hugetlb_get_unmapped_area() returns higher address than mmap_min_addr
  mm: shmem: rename mTHP shmem counters
  mm: swap_state: use folio_alloc_mpol() in __read_swap_cache_async()
  mm/migrate: putback split folios when numa hint migration fails
  ...
 2024-07-21 17:15:46 -07:00
Linus Torvalds
6706415bf9 gfs2 fixes and cleanups 
- Revise the glock reference counting model
 
 - Several quota related fixes
 
 - Clean up the glock demote logic
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Merge tag 'gfs2-v6.10-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2

Pull gfs2 updates from Andreas Gruenbacher:
 "Fixes and cleanups:

   - Revise the glock reference counting model and LRU list handling to
     be more sensible

   - Several quota related fixes: clean up the quota code, add some
     missing locking, and work around the on-disk corruption that the
     reverted patch "gfs2: ignore negated quota changes" causes

   - Clean up the glock demote logic in glock_work_func()"

* tag 'gfs2-v6.10-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2: (29 commits)
  gfs2: Clean up glock demote logic
  gfs2: Revert "check for no eligible quota changes"
  gfs2: Be more careful with the quota sync generation
  gfs2: Get rid of some unnecessary quota locking
  gfs2: Add some missing quota locking
  gfs2: Fold qd_fish into gfs2_quota_sync
  gfs2: quota need_sync cleanup
  gfs2: Fix and clean up function do_qc
  gfs2: Revert "Add quota_change type"
  gfs2: Revert "ignore negated quota changes"
  gfs2: qd_check_sync cleanups
  gfs2: Revert "introduce qd_bh_get_or_undo"
  gfs2: Check quota consistency on mount
  gfs2: Minor gfs2_quota_init error path cleanup
  gfs2: Get rid of demote_ok checks
  Revert "GFS2: Don't add all glocks to the lru"
  gfs2: Revise glock reference counting model
  gfs2: Switch to a per-filesystem glock workqueue
  gfs2: Report when glocks cannot be freed for a long time
  gfs2: gfs2_glock_get cleanup
  ...
 2024-07-17 12:23:33 -07:00
Linus Torvalds
4f5e249ec0 vfs-6.11.iomap 
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Merge tag 'vfs-6.11.iomap' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull iomap updates from Christian Brauner:
 "This contains some minor work for the iomap subsystem:

   - Add documentation on the design of iomap and how to port to it

   - Optimize iomap_read_folio()

   - Bring back the change to iomap_write_end() to no increase i_size.

     This is accompanied by a change to xfs to reserve blocks for
     truncating large realtime inodes to avoid exposing stale data when
     iomap_write_end() stops increasing i_size"

* tag 'vfs-6.11.iomap' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  iomap: don't increase i_size in iomap_write_end()
  xfs: reserve blocks for truncating large realtime inode
  Documentation: the design of iomap and how to port
  iomap: Optimize iomap_read_folio
 2024-07-15 13:28:14 -07:00
Linus Torvalds
b8fc1bd73a vfs-6.11.mount.api 
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Merge tag 'vfs-6.11.mount.api' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs mount API updates from Christian Brauner:

 - Add a generic helper to parse uid and gid mount options.

   Currently we open-code the same logic in various filesystems which is
   error prone, especially since the verification of uid and gid mount
   options is a sensitive operation in the face of idmappings.

   Add a generic helper and convert all filesystems over to it. Make
   sure that filesystems that are mountable in unprivileged containers
   verify that the specified uid and gid can be represented in the
   owning namespace of the filesystem.

 - Convert hostfs to the new mount api.

* tag 'vfs-6.11.mount.api' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  fuse: Convert to new uid/gid option parsing helpers
  fuse: verify {g,u}id mount options correctly
  fat: Convert to new uid/gid option parsing helpers
  fat: Convert to new mount api
  fat: move debug into fat_mount_options
  vboxsf: Convert to new uid/gid option parsing helpers
  tracefs: Convert to new uid/gid option parsing helpers
  smb: client: Convert to new uid/gid option parsing helpers
  tmpfs: Convert to new uid/gid option parsing helpers
  ntfs3: Convert to new uid/gid option parsing helpers
  isofs: Convert to new uid/gid option parsing helpers
  hugetlbfs: Convert to new uid/gid option parsing helpers
  ext4: Convert to new uid/gid option parsing helpers
  exfat: Convert to new uid/gid option parsing helpers
  efivarfs: Convert to new uid/gid option parsing helpers
  debugfs: Convert to new uid/gid option parsing helpers
  autofs: Convert to new uid/gid option parsing helpers
  fs_parse: add uid & gid option option parsing helpers
  hostfs: Add const qualifier to host_root in hostfs_fill_super()
  hostfs: convert hostfs to use the new mount API
 2024-07-15 11:31:32 -07:00
Andrii Nakryiko
c10cb9148e docs/procfs: call out ioctl()-based PROCMAP_QUERY command existence 
Call out PROCMAP_QUERY ioctl() existence in the section describing
/proc/PID/maps file in documentation.  We refer user to UAPI header for
low-level details of this programmatic interface.

Link: https://lkml.kernel.org/r/20240627170900.1672542-5-andrii@kernel.org
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2024-07-12 15:52:12 -07:00
Eric Sandeen
9f111059e7
fs_parse: add uid & gid option option parsing helpers 
Multiple filesystems take uid and gid as options, and the code to
create the ID from an integer and validate it is standard boilerplate
that can be moved into common helper functions, so do that for
consistency and less cut&paste.

This also helps avoid the buggy pattern noted by Seth Jenkins at
https://lore.kernel.org/lkml/CALxfFW4BXhEwxR0Q5LSkg-8Vb4r2MONKCcUCVioehXQKr35eHg@mail.gmail.com/
because uid/gid parsing will fail before any assignment in most
filesystems.

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Link: https://lore.kernel.org/r/de859d0a-feb9-473d-a5e2-c195a3d47abb@redhat.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
 2024-07-02 06:20:49 +02:00
Jeff Xu
399ab86ea5 /proc/pid/smaps: add mseal info for vma 
Add sl in /proc/pid/smaps to indicate vma is sealed

Link: https://lkml.kernel.org/r/20240614232014.806352-2-jeffxu@google.com
Fixes: 8be7258aad ("mseal: add mseal syscall")
Signed-off-by: Jeff Xu <jeffxu@chromium.org>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Cc: Jann Horn <jannh@google.com>
Cc: Jorge Lucangeli Obes <jorgelo@chromium.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Stephen Röttger <sroettger@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2024-06-24 20:52:09 -07:00
Darrick J. Wong
a7ca193bc9
Documentation: the design of iomap and how to port 
Capture the design of iomap and how to port filesystems to use it.
Apologies for all the rst formatting, but it's necessary to distinguish
code from regular text.

A lot of this has been collected from various email conversations, code
comments, commit messages, my own understanding of iomap, and
Ritesh/Luis' previous efforts to create a document.  Please note a large
part of this has been taken from Dave's reply to last iomap doc
patchset. Thanks to Ritesh, Luis, Dave, Darrick, Matthew, Christoph and
other iomap developers who have taken time to explain the iomap design
in various emails, commits, comments etc.

Cc: Dave Chinner <david@fromorbit.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Inspired-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/r/20240614214347.GK6125@frogsfrogsfrogs
Signed-off-by: Christian Brauner <brauner@kernel.org>
 2024-06-19 15:58:19 +02:00
Andreas Gruenbacher
713f883438 gfs2: Get rid of demote_ok checks 
The demote_ok glock operation is only still used to prevent the inode
glocks of the "jindex" and "rindex" directories from getting recycled
while they are still referenced by sdp->sd_jindex and sdp->sd_rindex.
However, the LRU walking code will no longer recycle glocks which are
referenced, so the demote_ok glock operation is obsolete and can be
removed.

Each of a glock's holders in the gl_holders list is holding a reference
on the glock, so when the list of holders isn't empty in demote_ok(),
the existing reference count check will already prevent the glock from
getting released.  This means that demote_ok() is obsolete as well.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
 2024-05-29 15:34:55 +02:00
Andreas Gruenbacher
97d6fdcd79 gfs2: Update glocks documentation 
Rearrange the table of locking modes and associated caching capability
to be in order of increasing caching capability.

Update the description of the glock operations.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
 2024-05-29 15:34:50 +02:00
Linus Torvalds
9b62e02e63 16 hotfixes, 11 of which are cc:stable. 
A few nilfs2 fixes, the remainder are for MM: a couple of selftests fixes,
 various singletons fixing various issues in various parts.
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Merge tag 'mm-hotfixes-stable-2024-05-25-09-13' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc fixes from Andrew Morton:
 "16 hotfixes, 11 of which are cc:stable.

  A few nilfs2 fixes, the remainder are for MM: a couple of selftests
  fixes, various singletons fixing various issues in various parts"

* tag 'mm-hotfixes-stable-2024-05-25-09-13' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  mm/ksm: fix possible UAF of stable_node
  mm/memory-failure: fix handling of dissolved but not taken off from buddy pages
  mm: /proc/pid/smaps_rollup: avoid skipping vma after getting mmap_lock again
  nilfs2: fix potential hang in nilfs_detach_log_writer()
  nilfs2: fix unexpected freezing of nilfs_segctor_sync()
  nilfs2: fix use-after-free of timer for log writer thread
  selftests/mm: fix build warnings on ppc64
  arm64: patching: fix handling of execmem addresses
  selftests/mm: compaction_test: fix bogus test success and reduce probability of OOM-killer invocation
  selftests/mm: compaction_test: fix incorrect write of zero to nr_hugepages
  selftests/mm: compaction_test: fix bogus test success on Aarch64
  mailmap: update email address for Satya Priya
  mm/huge_memory: don't unpoison huge_zero_folio
  kasan, fortify: properly rename memintrinsics
  lib: add version into /proc/allocinfo output
  mm/vmalloc: fix vmalloc which may return null if called with __GFP_NOFAIL
 2024-05-25 15:10:33 -07:00
Linus Torvalds
74eca356f6 We have a series from Xiubo that adds support for additional access 
checks based on MDS auth caps which were recently made available to
 clients.  This is needed to prevent scenarios where the MDS quietly
 discards updates that a UID-restricted client previously (wrongfully)
 acked to the user.  Other than that, just a documentation fixup.
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Merge tag 'ceph-for-6.10-rc1' of https://github.com/ceph/ceph-client

Pull ceph updates from Ilya Dryomov:
 "A series from Xiubo that adds support for additional access checks
  based on MDS auth caps which were recently made available to clients.

  This is needed to prevent scenarios where the MDS quietly discards
  updates that a UID-restricted client previously (wrongfully) acked to
  the user.

  Other than that, just a documentation fixup"

* tag 'ceph-for-6.10-rc1' of https://github.com/ceph/ceph-client:
  doc: ceph: update userspace command to get CephFS metadata
  ceph: add CEPHFS_FEATURE_MDS_AUTH_CAPS_CHECK feature bit
  ceph: check the cephx mds auth access for async dirop
  ceph: check the cephx mds auth access for open
  ceph: check the cephx mds auth access for setattr
  ceph: add ceph_mds_check_access() helper
  ceph: save cap_auths in MDS client when session is opened
 2024-05-25 14:23:58 -07:00
Suren Baghdasaryan
a38568a0b4 lib: add version into /proc/allocinfo output 
Add version string and a header at the beginning of /proc/allocinfo to
allow later format changes.  Example output:

> head /proc/allocinfo
allocinfo - version: 1.0
#     <size>  <calls> <tag info>
           0        0 init/main.c:1314 func:do_initcalls
           0        0 init/do_mounts.c:353 func:mount_nodev_root
           0        0 init/do_mounts.c:187 func:mount_root_generic
           0        0 init/do_mounts.c:158 func:do_mount_root
           0        0 init/initramfs.c:493 func:unpack_to_rootfs
           0        0 init/initramfs.c:492 func:unpack_to_rootfs
           0        0 init/initramfs.c:491 func:unpack_to_rootfs
         512        1 arch/x86/events/rapl.c:681 func:init_rapl_pmus
         128        1 arch/x86/events/rapl.c:571 func:rapl_cpu_online

[akpm@linux-foundation.org: remove stray newline from struct allocinfo_private]
Link: https://lkml.kernel.org/r/20240514163128.3662251-1-surenb@google.com
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2024-05-24 11:55:05 -07:00
Artem Ikonnikov
93a2221c9c doc: ceph: update userspace command to get CephFS metadata 
According to ceph documentation [1], "getfattr -d /some/dir" no longer
displays the list of all extended attributes. Both CephFS kernel and
FUSE clients hide this information.

To retrieve the information you have to specify the particular attribute
name e.g. "getfattr -n ceph.dir.rbytes /some/dir".

[1] https://docs.ceph.com/en/latest/cephfs/quota/

Signed-off-by: Artem Ikonnikov <artem@datacrunch.io>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
 2024-05-23 10:35:47 +02:00
Linus Torvalds
5ad8b6ad9a getting rid of bogus set_blocksize() uses, switching it 
to struct file * and verifying that caller has device
 opened exclusively.
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Merge tag 'pull-set_blocksize' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull vfs blocksize updates from Al Viro:
 "This gets rid of bogus set_blocksize() uses, switches it over
  to be based on a 'struct file *' and verifies that the caller
  has the device opened exclusively"

* tag 'pull-set_blocksize' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  make set_blocksize() fail unless block device is opened exclusive
  set_blocksize(): switch to passing struct file *
  btrfs_get_bdev_and_sb(): call set_blocksize() only for exclusive opens
  swsusp: don't bother with setting block size
  zram: don't bother with reopening - just use O_EXCL for open
  swapon(2): open swap with O_EXCL
  swapon(2)/swapoff(2): don't bother with block size
  pktcdvd: sort set_blocksize() calls out
  bcache_register(): don't bother with set_blocksize()
 2024-05-21 08:34:51 -07:00
Linus Torvalds
72ece20127 f2fs update for 6.10-rc1 
In this round, we've tried to address some performance issues on zoned storage
 such as direct IO and write_hints. In addition, we've migrated some IO paths
 using folio. Meanwhile, there are multiple bug fixes in the compression paths,
 sanity check conditions, and error handlers.
 
 Enhancement:
  - allow direct io of pinned files for zoned storage
  - assign the write hint per stream by default
  - convert read paths and test_writeback to folio
  - avoid allocating WARM_DATA segment for direct IO
 
 Bug fix:
  - fix false alarm on invalid block address
  - fix to add missing iput() in gc_data_segment()
  - fix to release node block count in error path of f2fs_new_node_page()
  - compress: don't allow unaligned truncation on released compress inode
  - compress: fix to cover {reserve,release}_compress_blocks() w/ cp_rwsem lock
  - compress: fix error path of inc_valid_block_count()
  - compress: fix to update i_compr_blocks correctly
  - fix block migration when section is not aligned to pow2
  - don't trigger OPU on pinfile for direct IO
  - fix to do sanity check on i_xattr_nid in sanity_check_inode()
  - write missing last sum blk of file pinning section
  - clear writeback when compression failed
  - fix to adjust appropirate defragment pg_end
 
 As usual, there are several minor code clean-ups, and fixes to manage missing
 corner cases in the error paths.
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Merge tag 'f2fs-for-6.10.rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

Pull f2fs updates from Jaegeuk Kim:
 "In this round, we've tried to address some performance issues on zoned
  storage such as direct IO and write_hints. In addition, we've migrated
  some IO paths using folio. Meanwhile, there are multiple bug fixes in
  the compression paths, sanity check conditions, and error handlers.

  Enhancements:
   - allow direct io of pinned files for zoned storage
   - assign the write hint per stream by default
   - convert read paths and test_writeback to folio
   - avoid allocating WARM_DATA segment for direct IO

  Bug fixes:
   - fix false alarm on invalid block address
   - fix to add missing iput() in gc_data_segment()
   - fix to release node block count in error path of
     f2fs_new_node_page()
   - compress:
       - don't allow unaligned truncation on released compress inode
       - cover {reserve,release}_compress_blocks() w/ cp_rwsem lock
       - fix error path of inc_valid_block_count()
       - fix to update i_compr_blocks correctly
   - fix block migration when section is not aligned to pow2
   - don't trigger OPU on pinfile for direct IO
   - fix to do sanity check on i_xattr_nid in sanity_check_inode()
   - write missing last sum blk of file pinning section
   - clear writeback when compression failed
   - fix to adjust appropirate defragment pg_end

  As usual, there are several minor code clean-ups, and fixes to manage
  missing corner cases in the error paths"

* tag 'f2fs-for-6.10.rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (50 commits)
  f2fs: initialize last_block_in_bio variable
  f2fs: Add inline to f2fs_build_fault_attr() stub
  f2fs: fix some ambiguous comments
  f2fs: fix to add missing iput() in gc_data_segment()
  f2fs: allow dirty sections with zero valid block for checkpoint disabled
  f2fs: compress: don't allow unaligned truncation on released compress inode
  f2fs: fix to release node block count in error path of f2fs_new_node_page()
  f2fs: compress: fix to cover {reserve,release}_compress_blocks() w/ cp_rwsem lock
  f2fs: compress: fix error path of inc_valid_block_count()
  f2fs: compress: fix typo in f2fs_reserve_compress_blocks()
  f2fs: compress: fix to update i_compr_blocks correctly
  f2fs: check validation of fault attrs in f2fs_build_fault_attr()
  f2fs: fix to limit gc_pin_file_threshold
  f2fs: remove unused GC_FAILURE_PIN
  f2fs: use f2fs_{err,info}_ratelimited() for cleanup
  f2fs: fix block migration when section is not aligned to pow2
  f2fs: zone: fix to don't trigger OPU on pinfile for direct IO
  f2fs: fix to do sanity check on i_xattr_nid in sanity_check_inode()
  f2fs: fix to avoid allocating WARM_DATA segment for direct IO
  f2fs: remove redundant parameter in is_next_segment_free()
  ...
 2024-05-20 13:23:43 -07:00
Linus Torvalds
119d1b8a5d New code for 6.10: 
* Introduce Parent Pointer extended attribute for inodes.
 
   * Online Repair
     - Implement atomic file content exchanges i.e. exchange ranges of bytes
       between two files atomically.
     - Create temporary files to repair file-based metadata. This uses atomic
       file content exchange facility to swap file fork mappings between the
       temporary file and the metadata inode.
 
     - Allow callers of directory/xattr code to set an explicit owner number to
       be written into the header fields of any new blocks that are created.
       This is required to avoid walking every block of the new structure and
       modify their ownership during online repair.
     - Repair
       - Extended attributes
       - Inode unlinked state
       - Directories
       - Symbolic links
       - AGI's unlinked inode list.
       - Parent pointers.
     - Move Orphan files to lost and found directory.
     - Fixes for Inode repair functionality.
     - Introduce a new sub-AG FITRIM implementation to reduce the duration for
       which the AGF lock is held.
     - Updates for the design documentation.
     - Use Parent Pointers to assist in checking directories, parent pointers,
       extended attributes, and link counts.
 
   * Bring back delalloc support for realtime devices which have an extent size
     that is equal to filesystem's block size.
 
   * Improve performance of log incompat feature handling.
 
   * Fixes
     - Prevent userspace from reading invalid file data due to incorrect.
       updation of file size when performing a non-atomic clone operation.
     - Minor fixes to online repair.
     - Fix confusing return values from xfs_bmapi_write().
     - Fix an out of bounds access due to incorrect h_size during log recovery.
     - Defer upgrading the extent counters in xfs_reflink_end_cow_extent() until
       we know we are going to modify the extent mapping.
     - Remove racy access to if_bytes check in xfs_reflink_end_cow_extent().
     - Fix sparse warnings.
 
   * Cleanups
     - Hold inode locks on all files involved in a rename until the completion
       of the operation. This is in preparation for the parent pointers patchset
       where parent pointers are applied in a separate chained update from the
       actual directory update.
     - Compile out v4 support when disabled.
     - Cleanup xfs_extent_busy_clear().
     - Remove unused flags and fields from struct xfs_da_args.
     - Remove definitions of unused functions.
     - Improve extended attribute validation.
     - Add higher level directory operations helpers to remove duplication of
       code.
     - Cleanup quota (un)reservation interfaces.
 
 Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
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Merge tag 'xfs-6.10-merge-6' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs updates from Chandan Babu:
 "Online repair feature continues to be expanded. Also, we now support
  delayed allocation for realtime devices which have an extent size that
  is equal to filesystem's block size.

  New code:

   - Introduce Parent Pointer extended attribute for inodes

   - Bring back delalloc support for realtime devices which have an
     extent size that is equal to filesystem's block size

   - Improve performance of log incompat feature handling

  Online Repair:

   - Implement atomic file content exchanges i.e. exchange ranges of
     bytes between two files atomically

   - Create temporary files to repair file-based metadata. This uses
     atomic file content exchange facility to swap file fork mappings
     between the temporary file and the metadata inode

   - Allow callers of directory/xattr code to set an explicit owner
     number to be written into the header fields of any new blocks that
     are created. This is required to avoid walking every block of the
     new structure and modify their ownership during online repair

   - Repair more data structures:
       - Extended attributes
       - Inode unlinked state
       - Directories
       - Symbolic links
       - AGI's unlinked inode list
       - Parent pointers

   - Move Orphan files to lost and found directory

   - Fixes for Inode repair functionality

   - Introduce a new sub-AG FITRIM implementation to reduce the duration
     for which the AGF lock is held

   - Updates for the design documentation

   - Use Parent Pointers to assist in checking directories, parent
     pointers, extended attributes, and link counts

  Fixes:

   - Prevent userspace from reading invalid file data due to incorrect.
     updation of file size when performing a non-atomic clone operation

   - Minor fixes to online repair

   - Fix confusing return values from xfs_bmapi_write()

   - Fix an out of bounds access due to incorrect h_size during log
     recovery

   - Defer upgrading the extent counters in xfs_reflink_end_cow_extent()
     until we know we are going to modify the extent mapping

   - Remove racy access to if_bytes check in
     xfs_reflink_end_cow_extent()

   - Fix sparse warnings

  Cleanups:

   - Hold inode locks on all files involved in a rename until the
     completion of the operation. This is in preparation for the parent
     pointers patchset where parent pointers are applied in a separate
     chained update from the actual directory update

   - Compile out v4 support when disabled

   - Cleanup xfs_extent_busy_clear()

   - Remove unused flags and fields from struct xfs_da_args

   - Remove definitions of unused functions

   - Improve extended attribute validation

   - Add higher level directory operations helpers to remove duplication
     of code

   - Cleanup quota (un)reservation interfaces"

* tag 'xfs-6.10-merge-6' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (221 commits)
  xfs: simplify iext overflow checking and upgrade
  xfs: remove a racy if_bytes check in xfs_reflink_end_cow_extent
  xfs: upgrade the extent counters in xfs_reflink_end_cow_extent later
  xfs: xfs_quota_unreserve_blkres can't fail
  xfs: consolidate the xfs_quota_reserve_blkres definitions
  xfs: clean up buffer allocation in xlog_do_recovery_pass
  xfs: fix log recovery buffer allocation for the legacy h_size fixup
  xfs: widen flags argument to the xfs_iflags_* helpers
  xfs: minor cleanups of xfs_attr3_rmt_blocks
  xfs: create a helper to compute the blockcount of a max sized remote value
  xfs: turn XFS_ATTR3_RMT_BUF_SPACE into a function
  xfs: use unsigned ints for non-negative quantities in xfs_attr_remote.c
  xfs: do not allocate the entire delalloc extent in xfs_bmapi_write
  xfs: fix xfs_bmap_add_extent_delay_real for partial conversions
  xfs: remove the xfs_iext_peek_prev_extent call in xfs_bmapi_allocate
  xfs: pass the actual offset and len to allocate to xfs_bmapi_allocate
  xfs: don't open code XFS_FILBLKS_MIN in xfs_bmapi_write
  xfs: lift a xfs_valid_startblock into xfs_bmapi_allocate
  xfs: remove the unusued tmp_logflags variable in xfs_bmapi_allocate
  xfs: fix error returns from xfs_bmapi_write
  ...
 2024-05-20 12:55:12 -07:00
Linus Torvalds
16dbfae867 bcachefs changes for 6.10-rc1 
- More safety fixes, primarily found by syzbot
 
 - Run the upgrade/downgrade paths in nochnages mode. Nochanges mode is
   primarily for testing fsck/recovery in dry run mode, so it shouldn't
   change anything besides disabling writes and holding dirty metadata in
   memory.
 
   The idea here was to reduce the amount of activity if we can't write
   anything out, so that bringing up a filesystem in "super ro" mode
   would be more lilkely to work for data recovery - but norecovery is
   the correct option for this.
 
 - btree_trans->locked; we now track whether a btree_trans has any btree
   nodes locked, and this is used for improved assertions related to
   trans_unlock() and trans_relock(). We'll also be using it for
   improving how we work with lockdep in the future: we don't want
   lockdep to be tracking individual btree node locks because we take too
   many for lockdep to track, and it's not necessary since we have a
   cycle detector.
 
 - Trigger improvements that are prep work for online fsck
 
 - BTREE_TRIGGER_check_repair; this regularizes how we do some repair
   work for extents that goes with running triggers in fsck, and fixes
   some subtle issues with transaction restarts there.
 
 - bch2_snapshot_equiv() has now been ripped out of fsck.c; snapshot
   equivalence classes are for when snapshot deletion leaves behind
   redundant snapshot nodes, but snapshot deletion now cleans this up
   right away, so the abstraction doesn't need to leak.
 
 - Improvements to how we resume writing to the journal in recovery. The
   code for picking the new place to write when reading the journal is
   greatly simplified and we also store the position in the superblock
   for when we don't read the journal; this means that we preserve more
   of the journal for list_journal debugging.
 
 - Improvements to sysfs btree_cache and btree_node_cache, for debugging
   memory reclaim.
 
 - We now detect when we've blocked for 10 seconds on the allocator in
   the write path and dump some useful info.
 
 - Safety fixes for devices references: this is a big series that changes
   almost all device lookups to properly check if the device exists and
   take a reference to it.
 
   Previously we assumed that if a bkey exists that references a device
   then the device must exist, and this was enforced in .invalid methods,
   but this was incorrect because it meant device removal relied on
   accounting being correct to not leave keys pointing to invalid
   devices, and that's not something we can assume.
 
   Getting the "pointer to invalid device" checks out of our .invalid()
   methods fixes some long standing device removal bugs; the only
   outstanding bug with device removal now is a race between the discard
   path and deleting alloc info, which should be easily fixed.
 
 - The allocator now prefers not to expand the new
   member_info.btree_allocated bitmap, meaning if repair ever requires
   scanning for btree nodes (because of a corrupt interior nodes) we
   won't have to scan the whole device(s).
 
 - New coding style document, which among other things talks about the
   correct usage of assertions
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Merge tag 'bcachefs-2024-05-19' of https://evilpiepirate.org/git/bcachefs

Pull bcachefs updates from Kent Overstreet:

 - More safety fixes, primarily found by syzbot

 - Run the upgrade/downgrade paths in nochnages mode. Nochanges mode is
   primarily for testing fsck/recovery in dry run mode, so it shouldn't
   change anything besides disabling writes and holding dirty metadata
   in memory.

   The idea here was to reduce the amount of activity if we can't write
   anything out, so that bringing up a filesystem in "super ro" mode
   would be more lilkely to work for data recovery - but norecovery is
   the correct option for this.

 - btree_trans->locked; we now track whether a btree_trans has any btree
   nodes locked, and this is used for improved assertions related to
   trans_unlock() and trans_relock(). We'll also be using it for
   improving how we work with lockdep in the future: we don't want
   lockdep to be tracking individual btree node locks because we take
   too many for lockdep to track, and it's not necessary since we have a
   cycle detector.

 - Trigger improvements that are prep work for online fsck

 - BTREE_TRIGGER_check_repair; this regularizes how we do some repair
   work for extents that goes with running triggers in fsck, and fixes
   some subtle issues with transaction restarts there.

 - bch2_snapshot_equiv() has now been ripped out of fsck.c; snapshot
   equivalence classes are for when snapshot deletion leaves behind
   redundant snapshot nodes, but snapshot deletion now cleans this up
   right away, so the abstraction doesn't need to leak.

 - Improvements to how we resume writing to the journal in recovery. The
   code for picking the new place to write when reading the journal is
   greatly simplified and we also store the position in the superblock
   for when we don't read the journal; this means that we preserve more
   of the journal for list_journal debugging.

 - Improvements to sysfs btree_cache and btree_node_cache, for debugging
   memory reclaim.

 - We now detect when we've blocked for 10 seconds on the allocator in
   the write path and dump some useful info.

 - Safety fixes for devices references: this is a big series that
   changes almost all device lookups to properly check if the device
   exists and take a reference to it.

   Previously we assumed that if a bkey exists that references a device
   then the device must exist, and this was enforced in .invalid
   methods, but this was incorrect because it meant device removal
   relied on accounting being correct to not leave keys pointing to
   invalid devices, and that's not something we can assume.

   Getting the "pointer to invalid device" checks out of our .invalid()
   methods fixes some long standing device removal bugs; the only
   outstanding bug with device removal now is a race between the discard
   path and deleting alloc info, which should be easily fixed.

 - The allocator now prefers not to expand the new
   member_info.btree_allocated bitmap, meaning if repair ever requires
   scanning for btree nodes (because of a corrupt interior nodes) we
   won't have to scan the whole device(s).

 - New coding style document, which among other things talks about the
   correct usage of assertions

* tag 'bcachefs-2024-05-19' of https://evilpiepirate.org/git/bcachefs: (155 commits)
  bcachefs: add no_invalid_checks flag
  bcachefs: add counters for failed shrinker reclaim
  bcachefs: Fix sb_field_downgrade validation
  bcachefs: Plumb bch_validate_flags to sb_field_ops.validate()
  bcachefs: s/bkey_invalid_flags/bch_validate_flags
  bcachefs: fsync() should not return -EROFS
  bcachefs: Invalid devices are now checked for by fsck, not .invalid methods
  bcachefs: kill bch2_dev_bkey_exists() in bch2_check_fix_ptrs()
  bcachefs: kill bch2_dev_bkey_exists() in bch2_read_endio()
  bcachefs: bch2_dev_get_ioref() checks for device not present
  bcachefs: bch2_dev_get_ioref2(); io_read.c
  bcachefs: bch2_dev_get_ioref2(); debug.c
  bcachefs: bch2_dev_get_ioref2(); journal_io.c
  bcachefs: bch2_dev_get_ioref2(); io_write.c
  bcachefs: bch2_dev_get_ioref2(); btree_io.c
  bcachefs: bch2_dev_get_ioref2(); backpointers.c
  bcachefs: bch2_dev_get_ioref2(); alloc_background.c
  bcachefs: for_each_bset() declares loop iter
  bcachefs: Move BCACHEFS_STATFS_MAGIC value to UAPI magic.h
  bcachefs: Improve sysfs internal/btree_cache
  ...
 2024-05-19 13:45:48 -07:00
Linus Torvalds
61307b7be4 The usual shower of singleton fixes and minor series all over MM, 
documented (hopefully adequately) in the respective changelogs.  Notable
 series include:
 
 - Lucas Stach has provided some page-mapping
   cleanup/consolidation/maintainability work in the series "mm/treewide:
   Remove pXd_huge() API".
 
 - In the series "Allow migrate on protnone reference with
   MPOL_PREFERRED_MANY policy", Donet Tom has optimized mempolicy's
   MPOL_PREFERRED_MANY mode, yielding almost doubled performance in one
   test.
 
 - In their series "Memory allocation profiling" Kent Overstreet and
   Suren Baghdasaryan have contributed a means of determining (via
   /proc/allocinfo) whereabouts in the kernel memory is being allocated:
   number of calls and amount of memory.
 
 - Matthew Wilcox has provided the series "Various significant MM
   patches" which does a number of rather unrelated things, but in largely
   similar code sites.
 
 - In his series "mm: page_alloc: freelist migratetype hygiene" Johannes
   Weiner has fixed the page allocator's handling of migratetype requests,
   with resulting improvements in compaction efficiency.
 
 - In the series "make the hugetlb migration strategy consistent" Baolin
   Wang has fixed a hugetlb migration issue, which should improve hugetlb
   allocation reliability.
 
 - Liu Shixin has hit an I/O meltdown caused by readahead in a
   memory-tight memcg.  Addressed in the series "Fix I/O high when memory
   almost met memcg limit".
 
 - In the series "mm/filemap: optimize folio adding and splitting" Kairui
   Song has optimized pagecache insertion, yielding ~10% performance
   improvement in one test.
 
 - Baoquan He has cleaned up and consolidated the early zone
   initialization code in the series "mm/mm_init.c: refactor
   free_area_init_core()".
 
 - Baoquan has also redone some MM initializatio code in the series
   "mm/init: minor clean up and improvement".
 
 - MM helper cleanups from Christoph Hellwig in his series "remove
   follow_pfn".
 
 - More cleanups from Matthew Wilcox in the series "Various page->flags
   cleanups".
 
 - Vlastimil Babka has contributed maintainability improvements in the
   series "memcg_kmem hooks refactoring".
 
 - More folio conversions and cleanups in Matthew Wilcox's series
 
 	"Convert huge_zero_page to huge_zero_folio"
 	"khugepaged folio conversions"
 	"Remove page_idle and page_young wrappers"
 	"Use folio APIs in procfs"
 	"Clean up __folio_put()"
 	"Some cleanups for memory-failure"
 	"Remove page_mapping()"
 	"More folio compat code removal"
 
 - David Hildenbrand chipped in with "fs/proc/task_mmu: convert hugetlb
   functions to work on folis".
 
 - Code consolidation and cleanup work related to GUP's handling of
   hugetlbs in Peter Xu's series "mm/gup: Unify hugetlb, part 2".
 
 - Rick Edgecombe has developed some fixes to stack guard gaps in the
   series "Cover a guard gap corner case".
 
 - Jinjiang Tu has fixed KSM's behaviour after a fork+exec in the series
   "mm/ksm: fix ksm exec support for prctl".
 
 - Baolin Wang has implemented NUMA balancing for multi-size THPs.  This
   is a simple first-cut implementation for now.  The series is "support
   multi-size THP numa balancing".
 
 - Cleanups to vma handling helper functions from Matthew Wilcox in the
   series "Unify vma_address and vma_pgoff_address".
 
 - Some selftests maintenance work from Dev Jain in the series
   "selftests/mm: mremap_test: Optimizations and style fixes".
 
 - Improvements to the swapping of multi-size THPs from Ryan Roberts in
   the series "Swap-out mTHP without splitting".
 
 - Kefeng Wang has significantly optimized the handling of arm64's
   permission page faults in the series
 
 	"arch/mm/fault: accelerate pagefault when badaccess"
 	"mm: remove arch's private VM_FAULT_BADMAP/BADACCESS"
 
 - GUP cleanups from David Hildenbrand in "mm/gup: consistently call it
   GUP-fast".
 
 - hugetlb fault code cleanups from Vishal Moola in "Hugetlb fault path to
   use struct vm_fault".
 
 - selftests build fixes from John Hubbard in the series "Fix
   selftests/mm build without requiring "make headers"".
 
 - Memory tiering fixes/improvements from Ho-Ren (Jack) Chuang in the
   series "Improved Memory Tier Creation for CPUless NUMA Nodes".  Fixes
   the initialization code so that migration between different memory types
   works as intended.
 
 - David Hildenbrand has improved follow_pte() and fixed an errant driver
   in the series "mm: follow_pte() improvements and acrn follow_pte()
   fixes".
 
 - David also did some cleanup work on large folio mapcounts in his
   series "mm: mapcount for large folios + page_mapcount() cleanups".
 
 - Folio conversions in KSM in Alex Shi's series "transfer page to folio
   in KSM".
 
 - Barry Song has added some sysfs stats for monitoring multi-size THP's
   in the series "mm: add per-order mTHP alloc and swpout counters".
 
 - Some zswap cleanups from Yosry Ahmed in the series "zswap same-filled
   and limit checking cleanups".
 
 - Matthew Wilcox has been looking at buffer_head code and found the
   documentation to be lacking.  The series is "Improve buffer head
   documentation".
 
 - Multi-size THPs get more work, this time from Lance Yang.  His series
   "mm/madvise: enhance lazyfreeing with mTHP in madvise_free" optimizes
   the freeing of these things.
 
 - Kemeng Shi has added more userspace-visible writeback instrumentation
   in the series "Improve visibility of writeback".
 
 - Kemeng Shi then sent some maintenance work on top in the series "Fix
   and cleanups to page-writeback".
 
 - Matthew Wilcox reduces mmap_lock traffic in the anon vma code in the
   series "Improve anon_vma scalability for anon VMAs".  Intel's test bot
   reported an improbable 3x improvement in one test.
 
 - SeongJae Park adds some DAMON feature work in the series
 
 	"mm/damon: add a DAMOS filter type for page granularity access recheck"
 	"selftests/damon: add DAMOS quota goal test"
 
 - Also some maintenance work in the series
 
 	"mm/damon/paddr: simplify page level access re-check for pageout"
 	"mm/damon: misc fixes and improvements"
 
 - David Hildenbrand has disabled some known-to-fail selftests ni the
   series "selftests: mm: cow: flag vmsplice() hugetlb tests as XFAIL".
 
 - memcg metadata storage optimizations from Shakeel Butt in "memcg:
   reduce memory consumption by memcg stats".
 
 - DAX fixes and maintenance work from Vishal Verma in the series
   "dax/bus.c: Fixups for dax-bus locking".
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Merge tag 'mm-stable-2024-05-17-19-19' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull mm updates from Andrew Morton:
 "The usual shower of singleton fixes and minor series all over MM,
  documented (hopefully adequately) in the respective changelogs.
  Notable series include:

   - Lucas Stach has provided some page-mapping cleanup/consolidation/
     maintainability work in the series "mm/treewide: Remove pXd_huge()
     API".

   - In the series "Allow migrate on protnone reference with
     MPOL_PREFERRED_MANY policy", Donet Tom has optimized mempolicy's
     MPOL_PREFERRED_MANY mode, yielding almost doubled performance in
     one test.

   - In their series "Memory allocation profiling" Kent Overstreet and
     Suren Baghdasaryan have contributed a means of determining (via
     /proc/allocinfo) whereabouts in the kernel memory is being
     allocated: number of calls and amount of memory.

   - Matthew Wilcox has provided the series "Various significant MM
     patches" which does a number of rather unrelated things, but in
     largely similar code sites.

   - In his series "mm: page_alloc: freelist migratetype hygiene"
     Johannes Weiner has fixed the page allocator's handling of
     migratetype requests, with resulting improvements in compaction
     efficiency.

   - In the series "make the hugetlb migration strategy consistent"
     Baolin Wang has fixed a hugetlb migration issue, which should
     improve hugetlb allocation reliability.

   - Liu Shixin has hit an I/O meltdown caused by readahead in a
     memory-tight memcg. Addressed in the series "Fix I/O high when
     memory almost met memcg limit".

   - In the series "mm/filemap: optimize folio adding and splitting"
     Kairui Song has optimized pagecache insertion, yielding ~10%
     performance improvement in one test.

   - Baoquan He has cleaned up and consolidated the early zone
     initialization code in the series "mm/mm_init.c: refactor
     free_area_init_core()".

   - Baoquan has also redone some MM initializatio code in the series
     "mm/init: minor clean up and improvement".

   - MM helper cleanups from Christoph Hellwig in his series "remove
     follow_pfn".

   - More cleanups from Matthew Wilcox in the series "Various
     page->flags cleanups".

   - Vlastimil Babka has contributed maintainability improvements in the
     series "memcg_kmem hooks refactoring".

   - More folio conversions and cleanups in Matthew Wilcox's series:
	"Convert huge_zero_page to huge_zero_folio"
	"khugepaged folio conversions"
	"Remove page_idle and page_young wrappers"
	"Use folio APIs in procfs"
	"Clean up __folio_put()"
	"Some cleanups for memory-failure"
	"Remove page_mapping()"
	"More folio compat code removal"

   - David Hildenbrand chipped in with "fs/proc/task_mmu: convert
     hugetlb functions to work on folis".

   - Code consolidation and cleanup work related to GUP's handling of
     hugetlbs in Peter Xu's series "mm/gup: Unify hugetlb, part 2".

   - Rick Edgecombe has developed some fixes to stack guard gaps in the
     series "Cover a guard gap corner case".

   - Jinjiang Tu has fixed KSM's behaviour after a fork+exec in the
     series "mm/ksm: fix ksm exec support for prctl".

   - Baolin Wang has implemented NUMA balancing for multi-size THPs.
     This is a simple first-cut implementation for now. The series is
     "support multi-size THP numa balancing".

   - Cleanups to vma handling helper functions from Matthew Wilcox in
     the series "Unify vma_address and vma_pgoff_address".

   - Some selftests maintenance work from Dev Jain in the series
     "selftests/mm: mremap_test: Optimizations and style fixes".

   - Improvements to the swapping of multi-size THPs from Ryan Roberts
     in the series "Swap-out mTHP without splitting".

   - Kefeng Wang has significantly optimized the handling of arm64's
     permission page faults in the series
	"arch/mm/fault: accelerate pagefault when badaccess"
	"mm: remove arch's private VM_FAULT_BADMAP/BADACCESS"

   - GUP cleanups from David Hildenbrand in "mm/gup: consistently call
     it GUP-fast".

   - hugetlb fault code cleanups from Vishal Moola in "Hugetlb fault
     path to use struct vm_fault".

   - selftests build fixes from John Hubbard in the series "Fix
     selftests/mm build without requiring "make headers"".

   - Memory tiering fixes/improvements from Ho-Ren (Jack) Chuang in the
     series "Improved Memory Tier Creation for CPUless NUMA Nodes".
     Fixes the initialization code so that migration between different
     memory types works as intended.

   - David Hildenbrand has improved follow_pte() and fixed an errant
     driver in the series "mm: follow_pte() improvements and acrn
     follow_pte() fixes".

   - David also did some cleanup work on large folio mapcounts in his
     series "mm: mapcount for large folios + page_mapcount() cleanups".

   - Folio conversions in KSM in Alex Shi's series "transfer page to
     folio in KSM".

   - Barry Song has added some sysfs stats for monitoring multi-size
     THP's in the series "mm: add per-order mTHP alloc and swpout
     counters".

   - Some zswap cleanups from Yosry Ahmed in the series "zswap
     same-filled and limit checking cleanups".

   - Matthew Wilcox has been looking at buffer_head code and found the
     documentation to be lacking. The series is "Improve buffer head
     documentation".

   - Multi-size THPs get more work, this time from Lance Yang. His
     series "mm/madvise: enhance lazyfreeing with mTHP in madvise_free"
     optimizes the freeing of these things.

   - Kemeng Shi has added more userspace-visible writeback
     instrumentation in the series "Improve visibility of writeback".

   - Kemeng Shi then sent some maintenance work on top in the series
     "Fix and cleanups to page-writeback".

   - Matthew Wilcox reduces mmap_lock traffic in the anon vma code in
     the series "Improve anon_vma scalability for anon VMAs". Intel's
     test bot reported an improbable 3x improvement in one test.

   - SeongJae Park adds some DAMON feature work in the series
	"mm/damon: add a DAMOS filter type for page granularity access recheck"
	"selftests/damon: add DAMOS quota goal test"

   - Also some maintenance work in the series
	"mm/damon/paddr: simplify page level access re-check for pageout"
	"mm/damon: misc fixes and improvements"

   - David Hildenbrand has disabled some known-to-fail selftests ni the
     series "selftests: mm: cow: flag vmsplice() hugetlb tests as
     XFAIL".

   - memcg metadata storage optimizations from Shakeel Butt in "memcg:
     reduce memory consumption by memcg stats".

   - DAX fixes and maintenance work from Vishal Verma in the series
     "dax/bus.c: Fixups for dax-bus locking""

* tag 'mm-stable-2024-05-17-19-19' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (426 commits)
  memcg, oom: cleanup unused memcg_oom_gfp_mask and memcg_oom_order
  selftests/mm: hugetlb_madv_vs_map: avoid test skipping by querying hugepage size at runtime
  mm/hugetlb: add missing VM_FAULT_SET_HINDEX in hugetlb_wp
  mm/hugetlb: add missing VM_FAULT_SET_HINDEX in hugetlb_fault
  selftests: cgroup: add tests to verify the zswap writeback path
  mm: memcg: make alloc_mem_cgroup_per_node_info() return bool
  mm/damon/core: fix return value from damos_wmark_metric_value
  mm: do not update memcg stats for NR_{FILE/SHMEM}_PMDMAPPED
  selftests: cgroup: remove redundant enabling of memory controller
  Docs/mm/damon/maintainer-profile: allow posting patches based on damon/next tree
  Docs/mm/damon/maintainer-profile: change the maintainer's timezone from PST to PT
  Docs/mm/damon/design: use a list for supported filters
  Docs/admin-guide/mm/damon/usage: fix wrong schemes effective quota update command
  Docs/admin-guide/mm/damon/usage: fix wrong example of DAMOS filter matching sysfs file
  selftests/damon: classify tests for functionalities and regressions
  selftests/damon/_damon_sysfs: use 'is' instead of '==' for 'None'
  selftests/damon/_damon_sysfs: find sysfs mount point from /proc/mounts
  selftests/damon/_damon_sysfs: check errors from nr_schemes file reads
  mm/damon/core: initialize ->esz_bp from damos_quota_init_priv()
  selftests/damon: add a test for DAMOS quota goal
  ...
 2024-05-19 09:21:03 -07:00
Linus Torvalds
0cc6f45cec IOMMU Updates for Linux v6.10 
Including:
 
 	- Core:
 	  - IOMMU memory usage observability - This will make the memory used
 	    for IO page tables explicitly visible.
 	  - Simplify arch_setup_dma_ops()
 
 	- Intel VT-d:
 	  - Consolidate domain cache invalidation
 	  - Remove private data from page fault message
 	  - Allocate DMAR fault interrupts locally
 	  - Cleanup and refactoring
 
 	- ARM-SMMUv2:
 	  - Support for fault debugging hardware on Qualcomm implementations
 	  - Re-land support for the ->domain_alloc_paging() callback
 
 	- ARM-SMMUv3:
 	  - Improve handling of MSI allocation failure
 	  - Drop support for the "disable_bypass" cmdline option
 	  - Major rework of the CD creation code, following on directly from the
 	    STE rework merged last time around.
 	  - Add unit tests for the new STE/CD manipulation logic
 
 	- AMD-Vi:
 	  - Final part of SVA changes with generic IO page fault handling
 
 	- Renesas IPMMU:
 	  - Add support for R8A779H0 hardware
 
 	- A couple smaller fixes and updates across the sub-tree
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Merge tag 'iommu-updates-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull iommu updates from Joerg Roedel:
 "Core:
   - IOMMU memory usage observability - This will make the memory used
     for IO page tables explicitly visible.
   - Simplify arch_setup_dma_ops()

  Intel VT-d:
   - Consolidate domain cache invalidation
   - Remove private data from page fault message
   - Allocate DMAR fault interrupts locally
   - Cleanup and refactoring

  ARM-SMMUv2:
   - Support for fault debugging hardware on Qualcomm implementations
   - Re-land support for the ->domain_alloc_paging() callback

  ARM-SMMUv3:
   - Improve handling of MSI allocation failure
   - Drop support for the "disable_bypass" cmdline option
   - Major rework of the CD creation code, following on directly from
     the STE rework merged last time around.
   - Add unit tests for the new STE/CD manipulation logic

  AMD-Vi:
   - Final part of SVA changes with generic IO page fault handling

  Renesas IPMMU:
   - Add support for R8A779H0 hardware

  ... and a couple smaller fixes and updates across the sub-tree"

* tag 'iommu-updates-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (80 commits)
  iommu/arm-smmu-v3: Make the kunit into a module
  arm64: Properly clean up iommu-dma remnants
  iommu/amd: Enable Guest Translation after reading IOMMU feature register
  iommu/vt-d: Decouple igfx_off from graphic identity mapping
  iommu/amd: Fix compilation error
  iommu/arm-smmu-v3: Add unit tests for arm_smmu_write_entry
  iommu/arm-smmu-v3: Build the whole CD in arm_smmu_make_s1_cd()
  iommu/arm-smmu-v3: Move the CD generation for SVA into a function
  iommu/arm-smmu-v3: Allocate the CD table entry in advance
  iommu/arm-smmu-v3: Make arm_smmu_alloc_cd_ptr()
  iommu/arm-smmu-v3: Consolidate clearing a CD table entry
  iommu/arm-smmu-v3: Move the CD generation for S1 domains into a function
  iommu/arm-smmu-v3: Make CD programming use arm_smmu_write_entry()
  iommu/arm-smmu-v3: Add an ops indirection to the STE code
  iommu/arm-smmu-qcom: Don't build debug features as a kernel module
  iommu/amd: Add SVA domain support
  iommu: Add ops->domain_alloc_sva()
  iommu/amd: Initial SVA support for AMD IOMMU
  iommu/amd: Add support for enable/disable IOPF
  iommu/amd: Add IO page fault notifier handler
  ...
 2024-05-18 10:55:13 -07:00
Linus Torvalds
1b10b390d9 EFI updates for v6.10: 
- Additional cleanup by Tim for the efivarfs variable name length
   confusion
 
 - Avoid freeing a bogus pointer when virtual remapping is omitted in the
   EFI boot stub
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Merge tag 'efi-next-for-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi

Pull EFI updates from Ard Biesheuvel:
 "Only a handful of changes this cycle, consisting of cleanup work and a
  low-prio bugfix:

   - Additional cleanup by Tim for the efivarfs variable name length
     confusion

   - Avoid freeing a bogus pointer when virtual remapping is omitted in
     the EFI boot stub"

* tag 'efi-next-for-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
  efi: libstub: only free priv.runtime_map when allocated
  efi: Clear up misconceptions about a maximum variable name size
  efivarfs: Remove unused internal struct members
  Documentation: Mark the 'efivars' sysfs interface as removed
  efi: pstore: Request at most 512 bytes for variable names
 2024-05-14 15:19:26 -07:00
Linus Torvalds
8815da98e0 Another not-too-busy cycle for documentation, including: 
- Some build-system changes to detect the variable fonts installed by some
   distributions that can break the PDF build.
 
 - Various updates and additions to the Spanish, Chinese, Italian, and
   Japanese translations.
 
 - Update the stable-kernel rules to match modern practice
 
 ...and the usual array of corrections, updates, and typo fixes.
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Merge tag 'docs-6.10' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "Another not-too-busy cycle for documentation, including:

   - Some build-system changes to detect the variable fonts installed by
     some distributions that can break the PDF build.

   - Various updates and additions to the Spanish, Chinese, Italian, and
     Japanese translations.

   - Update the stable-kernel rules to match modern practice

  ... and the usual array of corrections, updates, and typo fixes"

* tag 'docs-6.10' of git://git.lwn.net/linux: (42 commits)
  cgroup: Add documentation for missing zswap memory.stat
  kernel-doc: Added "*" in $type_constants2 to fix 'make htmldocs' warning.
  docs:core-api: fixed typos and grammar in printk-index page
  Documentation: tracing: Fix spelling mistakes
  docs/zh_CN/rust: Update the translation of quick-start to 6.9-rc4
  docs/zh_CN/rust: Update the translation of general-information to 6.9-rc4
  docs/zh_CN/rust: Update the translation of coding-guidelines to 6.9-rc4
  docs/zh_CN/rust: Update the translation of arch-support to 6.9-rc4
  docs: stable-kernel-rules: fix typo sent->send
  docs/zh_CN: remove two inconsistent spaces
  docs: scripts/check-variable-fonts.sh: Improve commands for detection
  docs: stable-kernel-rules: create special tag to flag 'no backporting'
  docs: stable-kernel-rules: explain use of stable@kernel.org (w/o @vger.)
  docs: stable-kernel-rules: remove code-labels tags and a indention level
  docs: stable-kernel-rules: call mainline by its name and change example
  docs: stable-kernel-rules: reduce redundancy
  docs, kprobes: Add riscv as supported architecture
  Docs: typos/spelling
  docs: kernel_include.py: Cope with docutils 0.21
  docs: ja_JP/howto: Catch up update in v6.8
  ...
 2024-05-13 10:51:53 -07:00
Kent Overstreet
706833dbe3 bcachefs: CodingStyle 
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
 2024-05-08 17:29:22 -04:00
Matthew Wilcox (Oracle)
5ec5aab775 doc: split buffer.rst out of api-summary.rst 
Buffer heads are no longer a generic filesystem API but an optional
filesystem support library.  Make the documentation structure reflect
that, and include the fine documentation kept in buffer_head.h.  We could
give a better overview of what buffer heads are all about, but my
enthusiasm for documenting it is limited.

[willy@infradead.org: fix kerneldoc warning]
  Link: https://lkml.kernel.org/r/20240417015933.453505-1-willy@infradead.org
[akpm@linux-foundation.org: remove newline at EOF]
Link: https://lkml.kernel.org/r/20240416031754.4076917-9-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Pankaj Raghav <p.raghav@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2024-05-05 17:53:40 -07:00
Al Viro
d18a867958 make set_blocksize() fail unless block device is opened exclusive 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2024-05-02 17:39:44 -04:00
Remington Brasga
da51bbcdba Docs: typos/spelling 
Fix spelling and grammar in Docs descriptions

Signed-off-by: Remington Brasga <rbrasga@uci.edu>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20240429225527.2329-1-rbrasga@uci.edu
 2024-05-02 10:02:29 -06:00
Suren Baghdasaryan
22d407b164 lib: add allocation tagging support for memory allocation profiling 
Introduce CONFIG_MEM_ALLOC_PROFILING which provides definitions to easily
instrument memory allocators.  It registers an "alloc_tags" codetag type
with /proc/allocinfo interface to output allocation tag information when
the feature is enabled.

CONFIG_MEM_ALLOC_PROFILING_DEBUG is provided for debugging the memory
allocation profiling instrumentation.

Memory allocation profiling can be enabled or disabled at runtime using
/proc/sys/vm/mem_profiling sysctl when CONFIG_MEM_ALLOC_PROFILING_DEBUG=n.
CONFIG_MEM_ALLOC_PROFILING_ENABLED_BY_DEFAULT enables memory allocation
profiling by default.

[surenb@google.com: Documentation/filesystems/proc.rst: fix allocinfo title]
  Link: https://lkml.kernel.org/r/20240326073813.727090-1-surenb@google.com
[surenb@google.com: do limited memory accounting for modules with ARCH_NEEDS_WEAK_PER_CPU]
  Link: https://lkml.kernel.org/r/20240402180933.1663992-2-surenb@google.com
[klarasmodin@gmail.com: explicitly include irqflags.h in alloc_tag.h]
  Link: https://lkml.kernel.org/r/20240407133252.173636-1-klarasmodin@gmail.com
[surenb@google.com: fix alloc_tag_init() to prevent passing NULL to PTR_ERR()]
  Link: https://lkml.kernel.org/r/20240417003349.2520094-1-surenb@google.com
Link: https://lkml.kernel.org/r/20240321163705.3067592-14-surenb@google.com
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Co-developed-by: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Klara Modin <klarasmodin@gmail.com>
Tested-by: Kees Cook <keescook@chromium.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Alex Gaynor <alex.gaynor@gmail.com>
Cc: Alice Ryhl <aliceryhl@google.com>
Cc: Andreas Hindborg <a.hindborg@samsung.com>
Cc: Benno Lossin <benno.lossin@proton.me>
Cc: "Björn Roy Baron" <bjorn3_gh@protonmail.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Gary Guo <gary@garyguo.net>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wedson Almeida Filho <wedsonaf@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2024-04-25 20:55:52 -07:00
Jaegeuk Kim
7643f3fe27 f2fs: assign the write hint per stream by default 
This reverts commit 930e260763 ("f2fs: remove obsolete whint_mode"), as we
decide to pass write hints to the disk.

Cc: Hyunchul Lee <cheol.lee@lge.com>
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
 2024-04-19 17:56:13 +00:00
Darrick J. Wong
67bdcd4999 docs: describe xfs directory tree online fsck 
I've added a scrubber that checks the directory tree structure and fixes
them; describe this in the design documentation.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
 2024-04-15 14:59:01 -07:00
Darrick J. Wong
c91fe20e5a docs: update offline parent pointer repair strategy 
Now update how xfs_repair checks and repairs parent pointer info.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
 2024-04-15 14:59:01 -07:00
Darrick J. Wong
5220727ce8 docs: update online directory and parent pointer repair sections 
Update the case studies of online directory and parent pointer
reconstruction to reflect what they actually do in the final version.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
 2024-04-15 14:59:00 -07:00
Darrick J. Wong
d85fe250f2 docs: update the parent pointers documentation to the final version 
Now that we've decided on the ondisk format of parent pointers, update
the documentation to reflect that.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
 2024-04-15 14:59:00 -07:00
Darrick J. Wong
e6c9e75fbe xfs: move files to orphanage instead of letting nlinks drop to zero 
If we encounter an inode with a nonzero link count but zero observed
links, move it to the orphanage.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
 2024-04-15 14:58:57 -07:00
Darrick J. Wong
1e58a8ccf2 xfs: move orphan files to the orphanage 
When we're repairing a directory structure or fixing the dotdot entry of
a subdirectory, it's possible that we won't ever find a parent for the
subdirectory.  When this is the case, move it to the orphanage, aka
/lost+found.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
 2024-04-15 14:58:56 -07:00
Darrick J. Wong
f783529bee docs: update swapext -> exchmaps language 
Start reworking the atomic swapext design documentation to refer to its
new file contents/mapping exchange name.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
 2024-04-15 14:54:25 -07:00
Darrick J. Wong
5302a5c8be xfs: only clear log incompat flags at clean unmount 
While reviewing the online fsck patchset, someone spied the
xfs_swapext_can_use_without_log_assistance function and wondered why we
go through this inverted-bitmask dance to avoid setting the
XFS_SB_FEAT_INCOMPAT_LOG_SWAPEXT feature.

(The same principles apply to the logged extended attribute update
feature bit in the since-merged LARP series.)

The reason for this dance is that xfs_add_incompat_log_feature is an
expensive operation -- it forces the log, pushes the AIL, and then if
nobody's beaten us to it, sets the feature bit and issues a synchronous
write of the primary superblock.  That could be a one-time cost
amortized over the life of the filesystem, but the log quiesce and cover
operations call xfs_clear_incompat_log_features to remove feature bits
opportunistically.  On a moderately loaded filesystem this leads to us
cycling those bits on and off over and over, which hurts performance.

Why do we clear the log incompat bits?  Back in ~2020 I think Dave and I
had a conversation on IRC[2] about what the log incompat bits represent.
IIRC in that conversation we decided that the log incompat bits protect
unrecovered log items so that old kernels won't try to recover them and
barf.  Since a clean log has no protected log items, we could clear the
bits at cover/quiesce time.

As Dave Chinner pointed out in the thread, clearing log incompat bits at
unmount time has positive effects for golden root disk image generator
setups, since the generator could be running a newer kernel than what
gets written to the golden image -- if there are log incompat fields set
in the golden image that was generated by a newer kernel/OS image
builder then the provisioning host cannot mount the filesystem even
though the log is clean and recovery is unnecessary to mount the
filesystem.

Given that it's expensive to set log incompat bits, we really only want
to do that once per bit per mount.  Therefore, I propose that we only
clear log incompat bits as part of writing a clean unmount record.  Do
this by adding an operational state flag to the xfs mount that guards
whether or not the feature bit clearing can actually take place.

This eliminates the l_incompat_users rwsem that we use to protect a log
cleaning operation from clearing a feature bit that a frontend thread is
trying to set -- this lock adds another way to fail w.r.t. locking.  For
the swapext series, I shard that into multiple locks just to work around
the lockdep complaints, and that's fugly.

Link: https://lore.kernel.org/linux-xfs/20240131230043.GA6180@frogsfrogsfrogs/
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
 2024-04-15 14:54:06 -07:00
Pasha Tatashin
212c5c078d iommu: account IOMMU allocated memory 
In order to be able to limit the amount of memory that is allocated
by IOMMU subsystem, the memory must be accounted.

Account IOMMU as part of the secondary pagetables as it was discussed
at LPC.

The value of SecPageTables now contains mmeory allocation by IOMMU
and KVM.

There is a difference between GFP_ACCOUNT and what NR_IOMMU_PAGES shows.
GFP_ACCOUNT is set only where it makes sense to charge to user
processes, i.e. IOMMU Page Tables, but there more IOMMU shared data
that should not really be charged to a specific process.

Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Acked-by: David Rientjes <rientjes@google.com>
Tested-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://lore.kernel.org/r/20240413002522.1101315-12-pasha.tatashin@soleen.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
 2024-04-15 14:31:48 +02:00
Tim Schumacher
5b625181fb Documentation: Mark the 'efivars' sysfs interface as removed 
The 'efivars' sysfs interface was removed in commit 0f5b2c69a4 ("efi:
vars: Remove deprecated 'efivars' sysfs interface"), but the ABI
documentation was not updated properly.

Strip down the documentation file for /sys/firmware/efi/vars to a very
basic description of what the interface was about, add a section about
the rough removal timeline, and inform the reader about the intended
replacement.

Signed-off-by: Tim Schumacher <timschumi@gmx.de>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
 2024-04-13 10:33:02 +02:00
Bagas Sanjaya
aa98e70fc6 Documentation: filesystems: Add bcachefs toctree 
Commit eb386617be ("bcachefs: Errcode tracepoint, documentation")
adds initial bcachefs documentation (private error codes) but without
any table of contents tree for the filesystem docs, hence Sphinx warns:

Documentation/filesystems/bcachefs/errorcodes.rst: WARNING: document isn't included in any toctree

Add bcachefs toctree to fix above warning.

Fixes: eb386617be ("bcachefs: Errcode tracepoint, documentation")
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
 2024-04-06 13:50:26 -04:00
Linus Torvalds
c5d9ab85eb f2fs update for 6.9-rc1 
In this round, there are a number of updates on mainly two areas: Zoned block
 device support and Per-file compression. For example, we've found several issues
 to support Zoned block device especially having large sections regarding to GC
 and file pinning used for Android devices. In compression side, we've fixed many
 corner race conditions that had broken the design assumption.
 
 Enhancement:
  - Support file pinning for Zoned block device having large section
  - Enhance the data recovery after sudden power cut on Zoned block device
  - Add more error injection cases to easily detect the kernel panics
  - add a proc entry show the entire disk layout
  - Improve various error paths paniced by BUG_ON in block allocation and GC
  - support SEEK_DATA and SEEK_HOLE for compression files
 
 Bug fix:
  - fix to avoid use-after-free issue in f2fs_filemap_fault
  - fix some race conditions to break the atomic write design assumption
  - fix to truncate meta inode pages forcely
  - resolve various per-file compression issues wrt the space management and
    compression policies
  - fix some swap-related bugs
 
 In addition, we removed deprecated codes such as io_bits and heap_allocation,
 and also fixed minor error handling routines with neat debugging messages.
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Merge tag 'f2fs-for-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

Pull f2fs update from Jaegeuk Kim:
 "In this round, there are a number of updates on mainly two areas:
  Zoned block device support and Per-file compression. For example,
  we've found several issues to support Zoned block device especially
  having large sections regarding to GC and file pinning used for
  Android devices. In compression side, we've fixed many corner race
  conditions that had broken the design assumption.

  Enhancements:
   - Support file pinning for Zoned block device having large section
   - Enhance the data recovery after sudden power cut on Zoned block
     device
   - Add more error injection cases to easily detect the kernel panics
   - add a proc entry show the entire disk layout
   - Improve various error paths paniced by BUG_ON in block allocation
     and GC
   - support SEEK_DATA and SEEK_HOLE for compression files

  Bug fixes:
   - avoid use-after-free issue in f2fs_filemap_fault
   - fix some race conditions to break the atomic write design
     assumption
   - fix to truncate meta inode pages forcely
   - resolve various per-file compression issues wrt the space
     management and compression policies
   - fix some swap-related bugs

  In addition, we removed deprecated codes such as io_bits and
  heap_allocation, and also fixed minor error handling routines with
  neat debugging messages"

* tag 'f2fs-for-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (60 commits)
  f2fs: fix to avoid use-after-free issue in f2fs_filemap_fault
  f2fs: truncate page cache before clearing flags when aborting atomic write
  f2fs: mark inode dirty for FI_ATOMIC_COMMITTED flag
  f2fs: prevent atomic write on pinned file
  f2fs: fix to handle error paths of {new,change}_curseg()
  f2fs: unify the error handling of f2fs_is_valid_blkaddr
  f2fs: zone: fix to remove pow2 check condition for zoned block device
  f2fs: fix to truncate meta inode pages forcely
  f2fs: compress: fix reserve_cblocks counting error when out of space
  f2fs: compress: relocate some judgments in f2fs_reserve_compress_blocks
  f2fs: add a proc entry show disk layout
  f2fs: introduce SEGS_TO_BLKS/BLKS_TO_SEGS for cleanup
  f2fs: fix to check return value of f2fs_gc_range
  f2fs: fix to check return value __allocate_new_segment
  f2fs: fix to do sanity check in update_sit_entry
  f2fs: fix to reset fields for unloaded curseg
  f2fs: clean up new_curseg()
  f2fs: relocate f2fs_precache_extents() in f2fs_swap_activate()
  f2fs: fix blkofs_end correctly in f2fs_migrate_blocks()
  f2fs: ro: don't start discard thread for readonly image
  ...
 2024-03-18 11:26:00 -07:00
Linus Torvalds
32a50540c3 bcachefs updates for 6.9 
- Subvolume children btree; this is needed for providing a userspace
    interface for walking subvolumes, which will come later
  - Lots of improvements to directory structure checking
  - Improved journal pipelining, significantly improving performance on
    high iodepth write workloads
  - Discard path improvements: the discard path is more efficient, and no
    longer flushes the journal unnecessarily
  - Buffered write path can now avoid taking the inode lock
  - new mm helper: memalloc_flags_{save|restore}
  - mempool now does kvmalloc mempools
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Merge tag 'bcachefs-2024-03-13' of https://evilpiepirate.org/git/bcachefs

Pull bcachefs updates from Kent Overstreet:

 - Subvolume children btree; this is needed for providing a userspace
   interface for walking subvolumes, which will come later

 - Lots of improvements to directory structure checking

 - Improved journal pipelining, significantly improving performance on
   high iodepth write workloads

 - Discard path improvements: the discard path is more efficient, and no
   longer flushes the journal unnecessarily

 - Buffered write path can now avoid taking the inode lock

 - new mm helper: memalloc_flags_{save|restore}

 - mempool now does kvmalloc mempools

* tag 'bcachefs-2024-03-13' of https://evilpiepirate.org/git/bcachefs: (128 commits)
  bcachefs: time_stats: shrink time_stat_buffer for better alignment
  bcachefs: time_stats: split stats-with-quantiles into a separate structure
  bcachefs: mean_and_variance: put struct mean_and_variance_weighted on a diet
  bcachefs: time_stats: add larger units
  bcachefs: pull out time_stats.[ch]
  bcachefs: reconstruct_alloc cleanup
  bcachefs: fix bch_folio_sector padding
  bcachefs: Fix btree key cache coherency during replay
  bcachefs: Always flush write buffer in delete_dead_inodes()
  bcachefs: Fix order of gc_done passes
  bcachefs: fix deletion of indirect extents in btree_gc
  bcachefs: Prefer struct_size over open coded arithmetic
  bcachefs: Kill unused flags argument to btree_split()
  bcachefs: Check for writing superblocks with nonsense member seq fields
  bcachefs: fix bch2_journal_buf_to_text()
  lib/generic-radix-tree.c: Make nodes more reasonably sized
  bcachefs: copy_(to|from)_user_errcode()
  bcachefs: Split out bkey_types.h
  bcachefs: fix lost journal buf wakeup due to improved pipelining
  bcachefs: intercept mountoption value for bool type
  ...
 2024-03-15 09:00:09 -07:00
Kent Overstreet
eb386617be bcachefs: Errcode tracepoint, documentation 
Add a tracepoint for downcasting private errors to standard errors, so
they can be recovered even when not logged; also, add some
documentation.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
 2024-03-13 21:22:25 -04:00
Linus Torvalds
babbcc0232 New code for 6.9: 
* Online Repair;
   ** New ondisk structures being repaired.
      - Inode's mode field by trying to obtain file type value from the a
        directory entry.
      - Quota counters.
      - Link counts of inodes.
      - FS summary counters.
      - rmap btrees.
        Support for in-memory btrees has been added to support repair of rmap
        btrees.
   ** Misc changes
      - Report corruption of metadata to the health tracking subsystem.
      - Enable indirect health reporting when resources are scarce.
      - Reduce memory usage while reparing refcount btree.
      - Extend "Bmap update" intent item to support atomic extent swapping on
        the realtime device.
      - Extend "Bmap update" intent item to support extended attribute fork and
        unwritten extents.
   ** Code cleanups
      - Bmap log intent.
      - Btree block pointer checking.
      - Btree readahead.
      - Buffer target.
      - Symbolic link code.
   * Remove mrlock wrapper around the rwsem.
   * Convert all the GFP_NOFS flag usages to use the scoped
     memalloc_nofs_save() API instead of direct calls with the GFP_NOFS.
   * Refactor and simplify xfile abstraction. Lower level APIs in
     shmem.c are required to be exported in order to achieve this.
   * Skip checking alignment constraints for inode chunk allocations when block
     size is larger than inode chunk size.
   * Do not submit delwri buffers collected during log recovery when an error
     has been encountered.
   * Fix SEEK_HOLE/DATA for file regions which have active COW extents.
   * Fix lock order inversion when executing error handling path during
     shrinking a filesystem.
   * Remove duplicate ifdefs.
 
 Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
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Merge tag 'xfs-6.9-merge-8' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs updates from Chandan Babu:

 - Online repair updates:
    - More ondisk structures being repaired:
        - Inode's mode field by trying to obtain file type value from
          the a directory entry
        - Quota counters
        - Link counts of inodes
        - FS summary counters
        - Support for in-memory btrees has been added to support repair
          of rmap btrees
    - Misc changes:
        - Report corruption of metadata to the health tracking subsystem
        - Enable indirect health reporting when resources are scarce
        - Reduce memory usage while repairing refcount btree
        - Extend "Bmap update" intent item to support atomic extent
          swapping on the realtime device
        - Extend "Bmap update" intent item to support extended attribute
          fork and unwritten extents
    - Code cleanups:
        - Bmap log intent
        - Btree block pointer checking
        - Btree readahead
        - Buffer target
        - Symbolic link code

 - Remove mrlock wrapper around the rwsem

 - Convert all the GFP_NOFS flag usages to use the scoped
   memalloc_nofs_save() API instead of direct calls with the GFP_NOFS

 - Refactor and simplify xfile abstraction. Lower level APIs in shmem.c
   are required to be exported in order to achieve this

 - Skip checking alignment constraints for inode chunk allocations when
   block size is larger than inode chunk size

 - Do not submit delwri buffers collected during log recovery when an
   error has been encountered

 - Fix SEEK_HOLE/DATA for file regions which have active COW extents

 - Fix lock order inversion when executing error handling path during
   shrinking a filesystem

 - Remove duplicate ifdefs

* tag 'xfs-6.9-merge-8' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (183 commits)
  xfs: shrink failure needs to hold AGI buffer
  mm/shmem.c: Use new form of *@param in kernel-doc
  kernel-doc: Add unary operator * to $type_param_ref
  xfs: use kvfree() in xlog_cil_free_logvec()
  xfs: xfs_btree_bload_prep_block() should use __GFP_NOFAIL
  xfs: fix scrub stats file permissions
  xfs: fix log recovery erroring out on refcount recovery failure
  xfs: move symlink target write function to libxfs
  xfs: move remote symlink target read function to libxfs
  xfs: move xfs_symlink_remote.c declarations to xfs_symlink_remote.h
  xfs: xfs_bmap_finish_one should map unwritten extents properly
  xfs: support deferred bmap updates on the attr fork
  xfs: support recovering bmap intent items targetting realtime extents
  xfs: add a realtime flag to the bmap update log redo items
  xfs: add a xattr_entry helper
  xfs: fix xfs_bunmapi to allow unmapping of partial rt extents
  xfs: move xfs_bmap_defer_add to xfs_bmap_item.c
  xfs: reuse xfs_bmap_update_cancel_item
  xfs: add a bi_entry helper
  xfs: remove xfs_trans_set_bmap_flags
  ...
 2024-03-13 13:52:24 -07:00
Linus Torvalds
1f44039766 A moderatly busy cycle for development this time around. 
- Some cleanup of the main index page for easier navigation
 
 - Rework some of the other top-level pages for better readability and, with
   luck, fewer merge conflicts in the future.
 
 - Submit-checklist improvements, hopefully the first of many.
 
 - New Italian translations
 
 - A fair number of kernel-doc fixes and improvements.  We have also dropped
   the recommendation to use an old version of Sphinx.
 
 - A new document from Thorsten on bisection
 
 ...and lots of fixes and updates.
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Merge tag 'docs-6.9' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "A moderatly busy cycle for development this time around.

   - Some cleanup of the main index page for easier navigation

   - Rework some of the other top-level pages for better readability
     and, with luck, fewer merge conflicts in the future.

   - Submit-checklist improvements, hopefully the first of many.

   - New Italian translations

   - A fair number of kernel-doc fixes and improvements. We have also
     dropped the recommendation to use an old version of Sphinx.

   - A new document from Thorsten on bisection

  ... and lots of fixes and updates"

* tag 'docs-6.9' of git://git.lwn.net/linux: (54 commits)
  docs: verify/bisect: fixes, finetuning, and support for Arch
  docs: Makefile: Add dependency to $(YNL_INDEX) for targets other than htmldocs
  docs: Move ja_JP/howto.rst to ja_JP/process/howto.rst
  docs: submit-checklist: use subheadings
  docs: submit-checklist: structure by category
  docs: new text on bisecting which also covers bug validation
  docs: drop the version constraints for sphinx and dependencies
  docs: kerneldoc-preamble.sty: Remove code for Sphinx <2.4
  docs: Restore "smart quotes" for quotes
  docs/zh_CN: accurate translation of "function"
  docs: Include simplified link titles in main index
  docs: Correct formatting of title in admin-guide/index.rst
  docs: kernel_feat.py: fix build error for missing files
  MAINTAINERS: Set the field name for subsystem profile section
  kasan: Add documentation for CONFIG_KASAN_EXTRA_INFO
  Fixed case issue with 'fault-injection' in documentation
  kernel-doc: handle #if in enums as well
  Documentation: update mailing list addresses
  doc: kerneldoc.py: fix indentation
  scripts/kernel-doc: simplify signature printing
  ...
 2024-03-12 15:18:34 -07:00
Linus Torvalds
3bf95d567d fscrypt updates for 6.9 
Fix flakiness in a test by releasing the quota synchronously when a key
 is removed, and other minor cleanups.
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Merge tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/linux

Pull fscrypt updates from Eric Biggers:
 "Fix flakiness in a test by releasing the quota synchronously when a
  key is removed, and other minor cleanups"

* tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/linux:
  fscrypt: shrink the size of struct fscrypt_inode_info slightly
  fscrypt: write CBC-CTS instead of CTS-CBC
  fscrypt: clear keyring before calling key_put()
  fscrypt: explicitly require that inode->i_blkbits be set
 2024-03-12 13:17:36 -07:00
Linus Torvalds
77417942e4 vfs-6.9.ntfs 
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Merge tag 'vfs-6.9.ntfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull ntfs update from Christian Brauner:
 "This removes the old ntfs driver. The new ntfs3 driver is a full
  replacement that was merged over two years ago. We've went through
  various userspace and either they use ntfs3 or they use the fuse
  version of ntfs and thus build neither ntfs nor ntfs3. I think that's
  a clear sign that we should risk removing the legacy ntfs driver.

  Quoting from Arch Linux and Debian:

   - Debian does neither build the legacy ntfs nor the new ntfs3:

     "Not currently built with Debian's kernel packages, 'ntfs' has been
      symlinked to 'ntfs-3g' as it relates to fstab and mount commands.

      Debian kernels are built without support of the ntfs3 driver
      developed by Paragon Software."  (cf. [2])

   - Archlinux provides ntfs3 as their default since 5.15:

     "All officially supported kernels with versions 5.15 or newer are
      built with CONFIG_NTFS3_FS=m and thus support it. Before 5.15,
      NTFS read and write support is provided by the NTFS-3G FUSE file
      system."  (cf. [1]).

  It's unmaintained apart from various odd fixes as well. Worst case we
  have to reintroduce it if someone really has a valid dependency on it.
  But it's worth trying to see whether we can remove it"

Link: https://wiki.archlinux.org/title/NTFS [1]
Link: https://wiki.debian.org/NTFS [2]

* tag 'vfs-6.9.ntfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  fs: remove NTFS classic from docum. index
  fs: Remove NTFS classic
 2024-03-11 09:55:17 -07:00
Linus Torvalds
7ea65c89d8 vfs-6.9.misc 
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Merge tag 'vfs-6.9.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull misc vfs updates from Christian Brauner:
 "Misc features, cleanups, and fixes for vfs and individual filesystems.

  Features:

   - Support idmapped mounts for hugetlbfs.

   - Add RWF_NOAPPEND flag for pwritev2(). This allows us to fix a bug
     where the passed offset is ignored if the file is O_APPEND. The new
     flag allows a caller to enforce that the offset is honored to
     conform to posix even if the file was opened in append mode.

   - Move i_mmap_rwsem in struct address_space to avoid false sharing
     between i_mmap and i_mmap_rwsem.

   - Convert efs, qnx4, and coda to use the new mount api.

   - Add a generic is_dot_dotdot() helper that's used by various
     filesystems and the VFS code instead of open-coding it multiple
     times.

   - Recently we've added stable offsets which allows stable ordering
     when iterating directories exported through NFS on e.g., tmpfs
     filesystems. Originally an xarray was used for the offset map but
     that caused slab fragmentation issues over time. This switches the
     offset map to the maple tree which has a dense mode that handles
     this scenario a lot better. Includes tests.

   - Finally merge the case-insensitive improvement series Gabriel has
     been working on for a long time. This cleanly propagates case
     insensitive operations through ->s_d_op which in turn allows us to
     remove the quite ugly generic_set_encrypted_ci_d_ops() operations.
     It also improves performance by trying a case-sensitive comparison
     first and then fallback to case-insensitive lookup if that fails.
     This also fixes a bug where overlayfs would be able to be mounted
     over a case insensitive directory which would lead to all sort of
     odd behaviors.

  Cleanups:

   - Make file_dentry() a simple accessor now that ->d_real() is
     simplified because of the backing file work we did the last two
     cycles.

   - Use the dedicated file_mnt_idmap helper in ntfs3.

   - Use smp_load_acquire/store_release() in the i_size_read/write
     helpers and thus remove the hack to handle i_size reads in the
     filemap code.

   - The SLAB_MEM_SPREAD is a nop now. Remove it from various places in
     fs/

   - It's no longer necessary to perform a second built-in initramfs
     unpack call because we retain the contents of the previous
     extraction. Remove it.

   - Now that we have removed various allocators kfree_rcu() always
     works with kmem caches and kmalloc(). So simplify various places
     that only use an rcu callback in order to handle the kmem cache
     case.

   - Convert the pipe code to use a lockdep comparison function instead
     of open-coding the nesting making lockdep validation easier.

   - Move code into fs-writeback.c that was located in a header but can
     be made static as it's only used in that one file.

   - Rewrite the alignment checking iterators for iovec and bvec to be
     easier to read, and also significantly more compact in terms of
     generated code. This saves 270 bytes of text on x86-64 (with
     clang-18) and 224 bytes on arm64 (with gcc-13). In profiles it also
     saves a bit of time for the same workload.

   - Switch various places to use KMEM_CACHE instead of
     kmem_cache_create().

   - Use inode_set_ctime_to_ts() in inode_set_ctime_current()

   - Use kzalloc() in name_to_handle_at() to avoid kernel infoleak.

   - Various smaller cleanups for eventfds.

  Fixes:

   - Fix various comments and typos, and unneeded initializations.

   - Fix stack allocation hack for clang in the select code.

   - Improve dump_mapping() debug code on a best-effort basis.

   - Fix build errors in various selftests.

   - Avoid wrap-around instrumentation in various places.

   - Don't allow user namespaces without an idmapping to be used for
     idmapped mounts.

   - Fix sysv sb_read() call.

   - Fix fallback implementation of the get_name() export operation"

* tag 'vfs-6.9.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (70 commits)
  hugetlbfs: support idmapped mounts
  qnx4: convert qnx4 to use the new mount api
  fs: use inode_set_ctime_to_ts to set inode ctime to current time
  libfs: Drop generic_set_encrypted_ci_d_ops
  ubifs: Configure dentry operations at dentry-creation time
  f2fs: Configure dentry operations at dentry-creation time
  ext4: Configure dentry operations at dentry-creation time
  libfs: Add helper to choose dentry operations at mount-time
  libfs: Merge encrypted_ci_dentry_ops and ci_dentry_ops
  fscrypt: Drop d_revalidate once the key is added
  fscrypt: Drop d_revalidate for valid dentries during lookup
  fscrypt: Factor out a helper to configure the lookup dentry
  ovl: Always reject mounting over case-insensitive directories
  libfs: Attempt exact-match comparison first during casefolded lookup
  efs: remove SLAB_MEM_SPREAD flag usage
  jfs: remove SLAB_MEM_SPREAD flag usage
  minix: remove SLAB_MEM_SPREAD flag usage
  openpromfs: remove SLAB_MEM_SPREAD flag usage
  proc: remove SLAB_MEM_SPREAD flag usage
  qnx6: remove SLAB_MEM_SPREAD flag usage
  ...
 2024-03-11 09:38:17 -07:00
Chao Yu
8b10d36537 f2fs: introduce FAULT_NO_SEGMENT 
Use it to simulate no free segment case during block allocation.

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
 2024-02-29 08:34:34 -08:00
Jaegeuk Kim
4e0197f993 f2fs: kill heap-based allocation 
No one uses this feature. Let's kill it.

Reviewed-by: Daeho Jeong <daehojeong@google.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
 2024-02-27 09:41:15 -08:00
Eric Biggers
2f944c66ae fscrypt: write CBC-CTS instead of CTS-CBC 
Calling CBC with ciphertext stealing "CBC-CTS" seems to be more common
than calling it "CTS-CBC".  E.g., CBC-CTS is used by OpenSSL, Crypto++,
RFC3962, and RFC6803.  The NIST SP800-38A addendum uses CBC-CS1,
CBC-CS2, and CBC-CS3, distinguishing between different CTS conventions
but similarly putting the CBC part first.  In the interest of avoiding
any idiosyncratic terminology, update the fscrypt documentation and the
fscrypt_mode "friendly names" to align with the more common convention.

Changing the "friendly names" only affects some log messages.  The
actual mode constants in the API are unchanged; those call it simply
"CTS".  Add a note to the documentation that clarifies that "CBC" and
"CTS" in the API really mean CBC-ESSIV and CBC-CTS, respectively.

Link: https://lore.kernel.org/r/20240224053550.44659-1-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
 2024-02-23 21:38:59 -08:00