Commit Graph

69133 Commits

Author SHA1 Message Date
Linus Torvalds
e913a8cdc2 Fixes around VM_FPNMAP and follow_pfn
- replace mm/frame_vector.c by get_user_pages in misc/habana and
   drm/exynos drivers, then move that into media as it's sole user
 - close race in generic_access_phys
 - s390 pci ioctl fix of this series landed in 5.11 already
 - properly revoke iomem mappings (/dev/mem, pci files)
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Merge tag 'topic/iomem-mmap-vs-gup-2021-02-22' of git://anongit.freedesktop.org/drm/drm

Pull follow_pfn() updates from Daniel Vetter:
 "Fixes around VM_FPNMAP and follow_pfn:

   - replace mm/frame_vector.c by get_user_pages in misc/habana and
     drm/exynos drivers, then move that into media as it's sole user

   - close race in generic_access_phys

   - s390 pci ioctl fix of this series landed in 5.11 already

   - properly revoke iomem mappings (/dev/mem, pci files)"

* tag 'topic/iomem-mmap-vs-gup-2021-02-22' of git://anongit.freedesktop.org/drm/drm:
  PCI: Revoke mappings like devmem
  PCI: Also set up legacy files only after sysfs init
  sysfs: Support zapping of binary attr mmaps
  resource: Move devmem revoke code to resource framework
  /dev/mem: Only set filp->f_mapping
  PCI: Obey iomem restrictions for procfs mmap
  mm: Close race in generic_access_phys
  media: videobuf2: Move frame_vector into media subsystem
  mm/frame-vector: Use FOLL_LONGTERM
  misc/habana: Use FOLL_LONGTERM for userptr
  misc/habana: Stop using frame_vector helpers
  drm/exynos: Use FOLL_LONGTERM for g2d cmdlists
  drm/exynos: Stop using frame_vector helpers
2021-02-22 17:45:02 -08:00
Linus Torvalds
4b5f9254e4 kconfig for kcmp syscall
drm userspaces uses this, systemd uses this, makes sense to pull it
 out from the checkpoint-restore bundle. Kees reviewed this from
 security pov and is happy with the final version.
 
 LWN coverage: https://lwn.net/Articles/845448/
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Merge tag 'topic/kcmp-kconfig-2021-02-22' of git://anongit.freedesktop.org/drm/drm

Pull kcmp kconfig update from Daniel Vetter:
 "Make the kcmp syscall available independently of checkpoint/restore.

  drm userspaces uses this, systemd uses this, so makes sense to pull it
  out from the checkpoint-restore bundle.

  Kees reviewed this from security pov and is happy with the final
  version"

Link: https://lwn.net/Articles/845448/

* tag 'topic/kcmp-kconfig-2021-02-22' of git://anongit.freedesktop.org/drm/drm:
  kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE
2021-02-22 17:15:30 -08:00
Linus Torvalds
7c70f3a748 Optimization:
- Cork the socket while there are queued replies
 
 Fixes:
 
 - DRC shutdown ordering
 - svc_rdma_accept() lockdep splat
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Merge tag 'nfsd-5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull more nfsd updates from Chuck Lever:
 "Here are a few additional NFSD commits for the merge window:

 Optimization:
   - Cork the socket while there are queued replies

  Fixes:
   - DRC shutdown ordering
   - svc_rdma_accept() lockdep splat"

* tag 'nfsd-5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  SUNRPC: Further clean up svc_tcp_sendmsg()
  SUNRPC: Remove redundant socket flags from svc_tcp_sendmsg()
  SUNRPC: Use TCP_CORK to optimise send performance on the server
  svcrdma: Hold private mutex while invoking rdma_accept()
  nfsd: register pernet ops last, unregister first
2021-02-22 13:29:55 -08:00
Linus Torvalds
20bf195e93 With netfs helper library and fscache rework delayed, just a few cap
handling improvements to avoid grabbing mmap_lock in some code paths
 and deal with capsnaps better and a mount option cleanup.
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Merge tag 'ceph-for-5.12-rc1' of git://github.com/ceph/ceph-client

Pull ceph updates from Ilya Dryomov:
 "With netfs helper library and fscache rework delayed, just a few cap
  handling improvements to avoid grabbing mmap_lock in some code paths
  and deal with capsnaps better and a mount option cleanup"

* tag 'ceph-for-5.12-rc1' of git://github.com/ceph/ceph-client:
  ceph: defer flushing the capsnap if the Fb is used
  libceph: remove osdtimeout option entirely
  libceph: deprecate [no]cephx_require_signatures options
  ceph: allow queueing cap/snap handling after putting cap references
  ceph: clean up inode work queueing
  ceph: fix flush_snap logic after putting caps
2021-02-22 13:27:51 -08:00
Linus Torvalds
9fe1904626 \n
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Merge tag 'fs_for_v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull isofs, udf, and quota updates from Jan Kara:
 "Several udf, isofs, and quota fixes"

* tag 'fs_for_v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  parser: Fix kernel-doc markups
  udf: handle large user and group ID
  isofs: handle large user and group ID
  parser: add unsigned int parser
  udf: fix silent AED tagLocation corruption
  isofs: release buffer head before return
  quota: Fix memory leak when handling corrupted quota file
2021-02-22 13:25:37 -08:00
Linus Torvalds
db99038542 \n
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Merge tag 'fsnotify_for_v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull fsnotify update from Jan Kara:
 "Make inotify groups be charged against appropriate memcgs"

* tag 'fsnotify_for_v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  inotify, memcg: account inotify instances to kmemcg
2021-02-22 13:23:29 -08:00
Linus Torvalds
d61c6a58ae \n
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Merge tag 'lazytime_for_v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull lazytime updates from Jan Kara:
 "Cleanups of the lazytime handling in the writeback code making rules
  for calling ->dirty_inode() filesystem handlers saner"

* tag 'lazytime_for_v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  ext4: simplify i_state checks in __ext4_update_other_inode_time()
  gfs2: don't worry about I_DIRTY_TIME in gfs2_fsync()
  fs: improve comments for writeback_single_inode()
  fs: drop redundant check from __writeback_single_inode()
  fs: clean up __mark_inode_dirty() a bit
  fs: pass only I_DIRTY_INODE flags to ->dirty_inode
  fs: don't call ->dirty_inode for lazytime timestamp updates
  fat: only specify I_DIRTY_TIME when needed in fat_update_time()
  fs: only specify I_DIRTY_TIME when needed in generic_update_time()
  fs: correctly document the inode dirty flags
2021-02-22 13:17:39 -08:00
Linus Torvalds
c63dca9e23 Description for this pull request:
- Improve file deletion performance with dirsync mount option.
 - fix shift-out-of-bounds in exfat_fill_super() generated by syzkaller.
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Merge tag 'exfat-for-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat

Pull exfat updates from Namjae Jeon:

 - improve file deletion performance with dirsync mount option

 - fix shift-out-of-bounds in exfat_fill_super() reported by syzkaller

* tag 'exfat-for-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat:
  exfat: improve performance of exfat_free_cluster when using dirsync mount option
  exfat: fix shift-out-of-bounds in exfat_fill_super()
2021-02-22 13:15:50 -08:00
Linus Torvalds
0f3d950ddd zonefs changes for 5.12-rc1
Two patches in this pull request:
 * A fix that did not make it in time for 5.11, to correct the file size
   initialization of full sequential zone, from Shin'ichiro
 * Add file operation tracepoints to help with debugging, from Johannes
 
 Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
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Merge tag 'zonefs-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs

Pull zonefs updates from Damien Le Moal:
 "Two changes:

   - A fix that did not make it in time for 5.11, to correct the file
     size initialization of full sequential zone, from Shin'ichiro

   - Add file operation tracepoints to help with debugging, from
     Johannes"

* tag 'zonefs-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs:
  zonefs: Fix file size of zones in full condition
  zonefs: add tracepoints for file operations
2021-02-22 13:13:51 -08:00
Linus Torvalds
250a25e7a1 Merge branch 'work.audit' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull RCU-safe common_lsm_audit() from Al Viro:
 "Make common_lsm_audit() non-blocking and usable from RCU pathwalk
  context.

  We don't really need to grab/drop dentry in there - rcu_read_lock() is
  enough. There's a couple of followups using that to simplify the
  logics in selinux, but those hadn't soaked in -next yet, so they'll
  have to go in next window"

* 'work.audit' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  make dump_common_audit_data() safe to be called from RCU pathwalk
  new helper: d_find_alias_rcu()
2021-02-22 13:05:30 -08:00
Linus Torvalds
205f92d7f2 Merge branch 'work.d_name' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull d_name whack-a-mole from Al Viro:
 "A bunch of places that play with ->d_name in printks instead of using
  proper formats..."

* 'work.d_name' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  orangefs_file_mmap(): use %pD
  cifs_debug: use %pd instead of messing with ->d_name
  erofs: use %pd instead of messing with ->d_name
  cramfs: use %pD instead of messing with file_dentry()->d_name
2021-02-22 13:03:30 -08:00
Linus Torvalds
0e63a5c6ba It has been a relatively quiet cycle in docsland.
- As promised, the minimum Sphinx version to build the docs is now 1.7,
    and we have dropped support for Python 2 entirely.  That allowed the
    removal of a bunch of compatibility code.
 
  - A set of treewide warning fixups from Mauro that I applied after it
    became clear nobody else was going to deal with them.
 
  - The automarkup mechanism can now create cross-references from relative
    paths to RST files.
 
  - More translations, typo fixes, and warning fixes.
 
 No conflicts with any other tree as far as I know.
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Merge tag 'docs-5.12' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "It has been a relatively quiet cycle in docsland.

   - As promised, the minimum Sphinx version to build the docs is now
     1.7, and we have dropped support for Python 2 entirely. That
     allowed the removal of a bunch of compatibility code.

   - A set of treewide warning fixups from Mauro that I applied after it
     became clear nobody else was going to deal with them.

   - The automarkup mechanism can now create cross-references from
     relative paths to RST files.

   - More translations, typo fixes, and warning fixes"

* tag 'docs-5.12' of git://git.lwn.net/linux: (75 commits)
  docs: kernel-hacking: be more civil
  docs: Remove the Microsoft rhetoric
  Documentation/admin-guide: kernel-parameters: Update nohlt section
  doc/admin-guide: fix spelling mistake: "perfomance" -> "performance"
  docs: Document cross-referencing using relative path
  docs: Enable usage of relative paths to docs on automarkup
  docs: thermal: fix spelling mistakes
  Documentation: admin-guide: Update kvm/xen config option
  docs: Make syscalls' helpers naming consistent
  coding-style.rst: Avoid comma statements
  Documentation: /proc/loadavg: add 3 more field descriptions
  Documentation/submitting-patches: Add blurb about backtraces in commit messages
  Docs: drop Python 2 support
  Move our minimum Sphinx version to 1.7
  Documentation: input: define ABS_PRESSURE/ABS_MT_PRESSURE resolution as grams
  scripts/kernel-doc: add internal hyperlink to DOC: sections
  Update Documentation/admin-guide/sysctl/fs.rst
  docs: Update DTB format references
  docs: zh_CN: add iio index.rst translation
  docs/zh_CN: add iio ep93xx_adc.rst translation
  ...
2021-02-22 10:57:46 -08:00
Hyeongseok Kim
f728760aa9 exfat: improve performance of exfat_free_cluster when using dirsync mount option
There are stressful update of cluster allocation bitmap when using
dirsync mount option which is doing sync buffer on every cluster bit
clearing. This could result in performance degradation when deleting
big size file.
Fix to update only when the bitmap buffer index is changed would make
less disk access, improving performance especially for truncate operation.

Testing with Samsung 256GB sdcard, mounted with dirsync option
(mount -t exfat /dev/block/mmcblk0p1 /temp/mount -o dirsync)

Remove 4GB file, blktrace result.
[Before] : 39 secs.
Total (blktrace):
 Reads Queued:      0,        0KiB   Writes Queued:      32775,    16387KiB
 Read Dispatches:   0,        0KiB   Write Dispatches:   32775,    16387KiB
 Reads Requeued:    0                Writes Requeued:        0
 Reads Completed:   0,        0KiB   Writes Completed:   32775,    16387KiB
 Read Merges:       0,        0KiB   Write Merges:           0,        0KiB
 IO unplugs:        2                Timer unplugs:          0

[After] : 1 sec.
Total (blktrace):
 Reads Queued:      0,        0KiB   Writes Queued:         13,        6KiB
 Read Dispatches:   0,        0KiB   Write Dispatches:      13,        6KiB
 Reads Requeued:    0                Writes Requeued:        0
 Reads Completed:   0,        0KiB   Writes Completed:      13,        6KiB
 Read Merges:       0,        0KiB   Write Merges:           0,        0KiB
 IO unplugs:        1                Timer unplugs:          0

Signed-off-by: Hyeongseok Kim <hyeongseok@gmail.com>
Acked-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
2021-02-22 09:55:14 +09:00
Namjae Jeon
78c276f549 exfat: fix shift-out-of-bounds in exfat_fill_super()
syzbot reported a warning which could cause shift-out-of-bounds issue.

Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x183/0x22e lib/dump_stack.c:120
 ubsan_epilogue lib/ubsan.c:148 [inline]
 __ubsan_handle_shift_out_of_bounds+0x432/0x4d0 lib/ubsan.c:395
 exfat_read_boot_sector fs/exfat/super.c:471 [inline]
 __exfat_fill_super fs/exfat/super.c:556 [inline]
 exfat_fill_super+0x2acb/0x2d00 fs/exfat/super.c:624
 get_tree_bdev+0x406/0x630 fs/super.c:1291
 vfs_get_tree+0x86/0x270 fs/super.c:1496
 do_new_mount fs/namespace.c:2881 [inline]
 path_mount+0x1937/0x2c50 fs/namespace.c:3211
 do_mount fs/namespace.c:3224 [inline]
 __do_sys_mount fs/namespace.c:3432 [inline]
 __se_sys_mount+0x2f9/0x3b0 fs/namespace.c:3409
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

exfat specification describe sect_per_clus_bits field of boot sector
could be at most 25 - sect_size_bits and at least 0. And sect_size_bits
can also affect this calculation, It also needs validation.
This patch add validation for sect_per_clus_bits and sect_size_bits
field of boot sector.

Fixes: 719c1e1829 ("exfat: add super block operations")
Cc: stable@vger.kernel.org # v5.9+
Reported-by: syzbot+da4fe66aaadd3c2e2d1c@syzkaller.appspotmail.com
Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
2021-02-22 09:55:13 +09:00
Linus Torvalds
d1fec2214b selinux/stable-5.12 PR 20210215
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Merge tag 'selinux-pr-20210215' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux

Pull selinux updates from Paul Moore:
 "We've got a good handful of patches for SELinux this time around; with
  everything passing the selinux-testsuite and applying cleanly to your
  tree as of a few minutes ago. The highlights are:

   - Add support for labeling anonymous inodes, and extend this new
     support to userfaultfd.

   - Fallback to SELinux genfs file labeling if the filesystem does not
     have xattr support. This is useful for virtiofs which can vary in
     its xattr support depending on the backing filesystem.

   - Classify and handle MPTCP the same as TCP in SELinux.

   - Ensure consistent behavior between inode_getxattr and
     inode_listsecurity when the SELinux policy is not loaded. This
     fixes a known problem with overlayfs.

   - A couple of patches to prune some unused variables from the SELinux
     code, mark private variables as static, and mark other variables as
     __ro_after_init or __read_mostly"

* tag 'selinux-pr-20210215' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
  fs: anon_inodes: rephrase to appropriate kernel-doc
  userfaultfd: use secure anon inodes for userfaultfd
  selinux: teach SELinux about anonymous inodes
  fs: add LSM-supporting anon-inode interface
  security: add inode_init_security_anon() LSM hook
  selinux: fall back to SECURITY_FS_USE_GENFS if no xattr support
  selinux: mark selinux_xfrm_refcount as __read_mostly
  selinux: mark some global variables __ro_after_init
  selinux: make selinuxfs_mount static
  selinux: drop the unnecessary aurule_callback variable
  selinux: remove unused global variables
  selinux: fix inconsistency between inode_getxattr and inode_listsecurity
  selinux: handle MPTCP consistently with TCP
2021-02-21 16:54:54 -08:00
Linus Torvalds
66f73fb3fa This pull request contains changes (actually just fixes) for UBIFS
JFFS2:
 - Fix for use-after-free in jffs2_sum_write_data()
 - Fix for out-of-bounds access in jffs2_zlib_compress()
 
 UBI:
 - Remove dead/useless code
 
 UBIFS:
 - Fix for a memory leak in ubifs_init_authentication()
 - Fix for high stack usage
 - Fix for a off-by-one error in xattrs code
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Merge tag 'for-linus-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs

Pull JFFS2/UBIFS and UBI updates from Richard Weinberger:
 "JFFS2:
   - Fix for use-after-free in jffs2_sum_write_data()
   - Fix for out-of-bounds access in jffs2_zlib_compress()

  UBI:
   - Remove dead/useless code

  UBIFS:
   - Fix for a memory leak in ubifs_init_authentication()
   - Fix for high stack usage
   - Fix for a off-by-one error in xattrs code"

* tag 'for-linus-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs:
  ubifs: Fix error return code in alloc_wbufs()
  jffs2: check the validity of dstlen in jffs2_zlib_compress()
  ubifs: Fix off-by-one error
  ubifs: replay: Fix high stack usage, again
  ubifs: Fix memleak in ubifs_init_authentication
  jffs2: fix use after free in jffs2_sum_write_data()
  ubi: eba: Delete useless kfree code
  ubi: remove dead code in validate_vid_hdr()
2021-02-21 13:57:08 -08:00
Linus Torvalds
04471d3f18 This pull request contains the following changes for UML:
- Many cleanups and fixes for our virtio code
 - Add support for a pseudo RTC
 - Fix for a possible jailbreak
 - Minor fixes (spelling, header files)
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Merge tag 'for-linux-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

Pull UML updates from Richard Weinberger:

 - Many cleanups and fixes for our virtio code

 - Add support for a pseudo RTC

 - Fix for a possible jailbreak

 - Minor fixes (spelling, header files)

* tag 'for-linux-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
  um: irq.h: include <asm-generic/irq.h>
  um: io.h: include <linux/types.h>
  um: add a pseudo RTC
  um: remove process stub VMA
  um: rework userspace stubs to not hard-code stub location
  um: separate child and parent errors in clone stub
  um: defer killing userspace on page table update failures
  um: mm: check more comprehensively for stub changes
  um: print register names in wait_for_stub
  um: hostfs: use a kmem cache for inodes
  mm: Remove arch_remap() and mm-arch-hooks.h
  um: fix spelling mistake in Kconfig "privleges" -> "privileges"
  um: virtio: allow devices to be configured for wakeup
  um: time-travel: rework interrupt handling in ext mode
  um: virtio: disable VQs during suspend
  um: virtio: fix handling of messages without payload
  um: virtio: clean up a comment
2021-02-21 13:53:00 -08:00
Linus Torvalds
df24212a49 s390 updates for the 5.12 merge window
- Convert to using the generic entry infrastructure.
 
 - Add vdso time namespace support.
 
 - Switch s390 and alpha to 64-bit ino_t. As discussed here
   lkml.kernel.org/r/YCV7QiyoweJwvN+m@osiris
 
 - Get rid of expensive stck (store clock) usages where possible. Utilize
   cpu alternatives to patch stckf when supported.
 
 - Make tod_clock usage less error prone by converting it to a union and
   rework code which is using it.
 
 - Machine check handler fixes and cleanups.
 
 - Drop couple of minor inline asm optimizations to fix clang build.
 
 - Default configs changes notably to make libvirt happy.
 
 - Various changes to rework and improve qdio code.
 
 - Other small various fixes and improvements all over the code.
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Merge tag 's390-5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Vasily Gorbik:

 - Convert to using the generic entry infrastructure.

 - Add vdso time namespace support.

 - Switch s390 and alpha to 64-bit ino_t. As discussed at

     https://lore.kernel.org/linux-mm/YCV7QiyoweJwvN+m@osiris/

 - Get rid of expensive stck (store clock) usages where possible.
   Utilize cpu alternatives to patch stckf when supported.

 - Make tod_clock usage less error prone by converting it to a union and
   rework code which is using it.

 - Machine check handler fixes and cleanups.

 - Drop couple of minor inline asm optimizations to fix clang build.

 - Default configs changes notably to make libvirt happy.

 - Various changes to rework and improve qdio code.

 - Other small various fixes and improvements all over the code.

* tag 's390-5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (68 commits)
  s390/qdio: remove 'merge_pending' mechanism
  s390/qdio: improve handling of PENDING buffers for QEBSM devices
  s390/qdio: rework q->qdio_error indication
  s390/qdio: inline qdio_kick_handler()
  s390/time: remove get_tod_clock_ext()
  s390/crypto: use store_tod_clock_ext()
  s390/hypfs: use store_tod_clock_ext()
  s390/debug: use union tod_clock
  s390/kvm: use union tod_clock
  s390/vdso: use union tod_clock
  s390/time: convert tod_clock_base to union
  s390/time: introduce new store_tod_clock_ext()
  s390/time: rename store_tod_clock_ext() and use union tod_clock
  s390/time: introduce union tod_clock
  s390,alpha: switch to 64-bit ino_t
  s390: split cleanup_sie
  s390: use r13 in cleanup_sie as temp register
  s390: fix kernel asce loading when sie is interrupted
  s390: add stack for machine check handler
  s390: use WRITE_ONCE when re-allocating async stack
  ...
2021-02-21 13:40:06 -08:00
Linus Torvalds
3e10585335 x86:
- Support for userspace to emulate Xen hypercalls
 - Raise the maximum number of user memslots
 - Scalability improvements for the new MMU.  Instead of the complex
   "fast page fault" logic that is used in mmu.c, tdp_mmu.c uses an
   rwlock so that page faults are concurrent, but the code that can run
   against page faults is limited.  Right now only page faults take the
   lock for reading; in the future this will be extended to some
   cases of page table destruction.  I hope to switch the default MMU
   around 5.12-rc3 (some testing was delayed due to Chinese New Year).
 - Cleanups for MAXPHYADDR checks
 - Use static calls for vendor-specific callbacks
 - On AMD, use VMLOAD/VMSAVE to save and restore host state
 - Stop using deprecated jump label APIs
 - Workaround for AMD erratum that made nested virtualization unreliable
 - Support for LBR emulation in the guest
 - Support for communicating bus lock vmexits to userspace
 - Add support for SEV attestation command
 - Miscellaneous cleanups
 
 PPC:
 - Support for second data watchpoint on POWER10
 - Remove some complex workarounds for buggy early versions of POWER9
 - Guest entry/exit fixes
 
 ARM64
 - Make the nVHE EL2 object relocatable
 - Cleanups for concurrent translation faults hitting the same page
 - Support for the standard TRNG hypervisor call
 - A bunch of small PMU/Debug fixes
 - Simplification of the early init hypercall handling
 
 Non-KVM changes (with acks):
 - Detection of contended rwlocks (implemented only for qrwlocks,
   because KVM only needs it for x86)
 - Allow __DISABLE_EXPORTS from assembly code
 - Provide a saner follow_pfn replacements for modules
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM updates from Paolo Bonzini:
 "x86:

   - Support for userspace to emulate Xen hypercalls

   - Raise the maximum number of user memslots

   - Scalability improvements for the new MMU.

     Instead of the complex "fast page fault" logic that is used in
     mmu.c, tdp_mmu.c uses an rwlock so that page faults are concurrent,
     but the code that can run against page faults is limited. Right now
     only page faults take the lock for reading; in the future this will
     be extended to some cases of page table destruction. I hope to
     switch the default MMU around 5.12-rc3 (some testing was delayed
     due to Chinese New Year).

   - Cleanups for MAXPHYADDR checks

   - Use static calls for vendor-specific callbacks

   - On AMD, use VMLOAD/VMSAVE to save and restore host state

   - Stop using deprecated jump label APIs

   - Workaround for AMD erratum that made nested virtualization
     unreliable

   - Support for LBR emulation in the guest

   - Support for communicating bus lock vmexits to userspace

   - Add support for SEV attestation command

   - Miscellaneous cleanups

  PPC:

   - Support for second data watchpoint on POWER10

   - Remove some complex workarounds for buggy early versions of POWER9

   - Guest entry/exit fixes

  ARM64:

   - Make the nVHE EL2 object relocatable

   - Cleanups for concurrent translation faults hitting the same page

   - Support for the standard TRNG hypervisor call

   - A bunch of small PMU/Debug fixes

   - Simplification of the early init hypercall handling

  Non-KVM changes (with acks):

   - Detection of contended rwlocks (implemented only for qrwlocks,
     because KVM only needs it for x86)

   - Allow __DISABLE_EXPORTS from assembly code

   - Provide a saner follow_pfn replacements for modules"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (192 commits)
  KVM: x86/xen: Explicitly pad struct compat_vcpu_info to 64 bytes
  KVM: selftests: Don't bother mapping GVA for Xen shinfo test
  KVM: selftests: Fix hex vs. decimal snafu in Xen test
  KVM: selftests: Fix size of memslots created by Xen tests
  KVM: selftests: Ignore recently added Xen tests' build output
  KVM: selftests: Add missing header file needed by xAPIC IPI tests
  KVM: selftests: Add operand to vmsave/vmload/vmrun in svm.c
  KVM: SVM: Make symbol 'svm_gp_erratum_intercept' static
  locking/arch: Move qrwlock.h include after qspinlock.h
  KVM: PPC: Book3S HV: Fix host radix SLB optimisation with hash guests
  KVM: PPC: Book3S HV: Ensure radix guest has no SLB entries
  KVM: PPC: Don't always report hash MMU capability for P9 < DD2.2
  KVM: PPC: Book3S HV: Save and restore FSCR in the P9 path
  KVM: PPC: remove unneeded semicolon
  KVM: PPC: Book3S HV: Use POWER9 SLBIA IH=6 variant to clear SLB
  KVM: PPC: Book3S HV: No need to clear radix host SLB before loading HPT guest
  KVM: PPC: Book3S HV: Fix radix guest SLB side channel
  KVM: PPC: Book3S HV: Remove support for running HPT guest on RPT host without mixed mode support
  KVM: PPC: Book3S HV: Introduce new capability for 2nd DAWR
  KVM: PPC: Book3S HV: Add infrastructure to support 2nd DAWR
  ...
2021-02-21 13:31:43 -08:00
Linus Torvalds
08179b47e1 Merge branch 'parisc-5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc updates from Helge Deller:

 - Optimize parisc page table locks by using the existing
   page_table_lock

 - Export argv0-preserve flag in binfmt_misc for usage in qemu-user

 - Fix interrupt table (IVT) checksum so firmware will call crash
   handler (HPMC)

 - Increase IRQ stack to 64kb on 64-bit kernel

 - Switch to common devmem_is_allowed() implementation

 - Minor fix to get_whan()

* 'parisc-5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  binfmt_misc: pass binfmt_misc flags to the interpreter
  parisc: Optimize per-pagetable spinlocks
  parisc: Replace test_ti_thread_flag() with test_tsk_thread_flag()
  parisc: Bump 64-bit IRQ stack size to 64 KB
  parisc: Fix IVT checksum calculation wrt HPMC
  parisc: Use the generic devmem_is_allowed()
  parisc: Drop out of get_whan() if task is running again
2021-02-21 13:20:41 -08:00
Linus Torvalds
99ca0edb41 arm64 updates for 5.12
- vDSO build improvements including support for building with BSD.
 
  - Cleanup to the AMU support code and initialisation rework to support
    cpufreq drivers built as modules.
 
  - Removal of synthetic frame record from exception stack when entering
    the kernel from EL0.
 
  - Add support for the TRNG firmware call introduced by Arm spec
    DEN0098.
 
  - Cleanup and refactoring across the board.
 
  - Avoid calling arch_get_random_seed_long() from
    add_interrupt_randomness()
 
  - Perf and PMU updates including support for Cortex-A78 and the v8.3
    SPE extensions.
 
  - Significant steps along the road to leaving the MMU enabled during
    kexec relocation.
 
  - Faultaround changes to initialise prefaulted PTEs as 'old' when
    hardware access-flag updates are supported, which drastically
    improves vmscan performance.
 
  - CPU errata updates for Cortex-A76 (#1463225) and Cortex-A55
    (#1024718)
 
  - Preparatory work for yielding the vector unit at a finer granularity
    in the crypto code, which in turn will one day allow us to defer
    softirq processing when it is in use.
 
  - Support for overriding CPU ID register fields on the command-line.
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 updates from Will Deacon:

 - vDSO build improvements including support for building with BSD.

 - Cleanup to the AMU support code and initialisation rework to support
   cpufreq drivers built as modules.

 - Removal of synthetic frame record from exception stack when entering
   the kernel from EL0.

 - Add support for the TRNG firmware call introduced by Arm spec
   DEN0098.

 - Cleanup and refactoring across the board.

 - Avoid calling arch_get_random_seed_long() from
   add_interrupt_randomness()

 - Perf and PMU updates including support for Cortex-A78 and the v8.3
   SPE extensions.

 - Significant steps along the road to leaving the MMU enabled during
   kexec relocation.

 - Faultaround changes to initialise prefaulted PTEs as 'old' when
   hardware access-flag updates are supported, which drastically
   improves vmscan performance.

 - CPU errata updates for Cortex-A76 (#1463225) and Cortex-A55
   (#1024718)

 - Preparatory work for yielding the vector unit at a finer granularity
   in the crypto code, which in turn will one day allow us to defer
   softirq processing when it is in use.

 - Support for overriding CPU ID register fields on the command-line.

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (85 commits)
  drivers/perf: Replace spin_lock_irqsave to spin_lock
  mm: filemap: Fix microblaze build failure with 'mmu_defconfig'
  arm64: Make CPU_BIG_ENDIAN depend on ld.bfd or ld.lld 13.0.0+
  arm64: cpufeatures: Allow disabling of Pointer Auth from the command-line
  arm64: Defer enabling pointer authentication on boot core
  arm64: cpufeatures: Allow disabling of BTI from the command-line
  arm64: Move "nokaslr" over to the early cpufeature infrastructure
  KVM: arm64: Document HVC_VHE_RESTART stub hypercall
  arm64: Make kvm-arm.mode={nvhe, protected} an alias of id_aa64mmfr1.vh=0
  arm64: Add an aliasing facility for the idreg override
  arm64: Honor VHE being disabled from the command-line
  arm64: Allow ID_AA64MMFR1_EL1.VH to be overridden from the command line
  arm64: cpufeature: Add an early command-line cpufeature override facility
  arm64: Extract early FDT mapping from kaslr_early_init()
  arm64: cpufeature: Use IDreg override in __read_sysreg_by_encoding()
  arm64: cpufeature: Add global feature override facility
  arm64: Move SCTLR_EL1 initialisation to EL-agnostic code
  arm64: Simplify init_el2_state to be non-VHE only
  arm64: Move VHE-specific SPE setup to mutate_to_vhe()
  arm64: Drop early setting of MDSCR_EL2.TPMS
  ...
2021-02-21 13:08:42 -08:00
Linus Torvalds
7b15c27e2f These changes fix MM (soft-)dirty bit management in the procfs code & clean up the API.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'core-mm-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull tlb gather updates from Ingo Molnar:
 "Theses fix MM (soft-)dirty bit management in the procfs code & clean
  up the TLB gather API"

* tag 'core-mm-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/ldt: Use tlb_gather_mmu_fullmm() when freeing LDT page-tables
  tlb: arch: Remove empty __tlb_remove_tlb_entry() stubs
  tlb: mmu_gather: Remove start/end arguments from tlb_gather_mmu()
  tlb: mmu_gather: Introduce tlb_gather_mmu_fullmm()
  tlb: mmu_gather: Remove unused start/end arguments from tlb_finish_mmu()
  mm: proc: Invalidate TLB after clearing soft-dirty page state
2021-02-21 12:19:56 -08:00
Linus Torvalds
5bbb336ba7 for-5.12/io_uring-2021-02-17
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Merge tag 'for-5.12/io_uring-2021-02-17' of git://git.kernel.dk/linux-block

Pull io_uring updates from Jens Axboe:
 "Highlights from this cycles are things like request recycling and
  task_work optimizations, which net us anywhere from 10-20% of speedups
  on workloads that mostly are inline.

  This work was originally done to put io_uring under memcg, which adds
  considerable overhead. But it's a really nice win as well. Also worth
  highlighting is the LOOKUP_CACHED work in the VFS, and using it in
  io_uring. Greatly speeds up the fast path for file opens.

  Summary:

   - Put io_uring under memcg protection. We accounted just the rings
     themselves under rlimit memlock before, now we account everything.

   - Request cache recycling, persistent across invocations (Pavel, me)

   - First part of a cleanup/improvement to buffer registration (Bijan)

   - SQPOLL fixes (Hao)

   - File registration NULL pointer fixup (Dan)

   - LOOKUP_CACHED support for io_uring

   - Disable /proc/thread-self/ for io_uring, like we do for /proc/self

   - Add Pavel to the io_uring MAINTAINERS entry

   - Tons of code cleanups and optimizations (Pavel)

   - Support for skip entries in file registration (Noah)"

* tag 'for-5.12/io_uring-2021-02-17' of git://git.kernel.dk/linux-block: (103 commits)
  io_uring: tctx->task_lock should be IRQ safe
  proc: don't allow async path resolution of /proc/thread-self components
  io_uring: kill cached requests from exiting task closing the ring
  io_uring: add helper to free all request caches
  io_uring: allow task match to be passed to io_req_cache_free()
  io-wq: clear out worker ->fs and ->files
  io_uring: optimise io_init_req() flags setting
  io_uring: clean io_req_find_next() fast check
  io_uring: don't check PF_EXITING from syscall
  io_uring: don't split out consume out of SQE get
  io_uring: save ctx put/get for task_work submit
  io_uring: don't duplicate io_req_task_queue()
  io_uring: optimise SQPOLL mm/files grabbing
  io_uring: optimise out unlikely link queue
  io_uring: take compl state from submit state
  io_uring: inline io_complete_rw_common()
  io_uring: move res check out of io_rw_reissue()
  io_uring: simplify iopoll reissuing
  io_uring: clean up io_req_free_batch_finish()
  io_uring: move submit side state closer in the ring
  ...
2021-02-21 11:10:39 -08:00
Linus Torvalds
582cd91f69 for-5.12/block-2021-02-17
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Merge tag 'for-5.12/block-2021-02-17' of git://git.kernel.dk/linux-block

Pull core block updates from Jens Axboe:
 "Another nice round of removing more code than what is added, mostly
  due to Christoph's relentless pursuit of tech debt removal/cleanups.
  This pull request contains:

   - Two series of BFQ improvements (Paolo, Jan, Jia)

   - Block iov_iter improvements (Pavel)

   - bsg error path fix (Pan)

   - blk-mq scheduler improvements (Jan)

   - -EBUSY discard fix (Jan)

   - bvec allocation improvements (Ming, Christoph)

   - bio allocation and init improvements (Christoph)

   - Store bdev pointer in bio instead of gendisk + partno (Christoph)

   - Block trace point cleanups (Christoph)

   - hard read-only vs read-only split (Christoph)

   - Block based swap cleanups (Christoph)

   - Zoned write granularity support (Damien)

   - Various fixes/tweaks (Chunguang, Guoqing, Lei, Lukas, Huhai)"

* tag 'for-5.12/block-2021-02-17' of git://git.kernel.dk/linux-block: (104 commits)
  mm: simplify swapdev_block
  sd_zbc: clear zone resources for non-zoned case
  block: introduce blk_queue_clear_zone_settings()
  zonefs: use zone write granularity as block size
  block: introduce zone_write_granularity limit
  block: use blk_queue_set_zoned in add_partition()
  nullb: use blk_queue_set_zoned() to setup zoned devices
  nvme: cleanup zone information initialization
  block: document zone_append_max_bytes attribute
  block: use bi_max_vecs to find the bvec pool
  md/raid10: remove dead code in reshape_request
  block: mark the bio as cloned in bio_iov_bvec_set
  block: set BIO_NO_PAGE_REF in bio_iov_bvec_set
  block: remove a layer of indentation in bio_iov_iter_get_pages
  block: turn the nr_iovecs argument to bio_alloc* into an unsigned short
  block: remove the 1 and 4 vec bvec_slabs entries
  block: streamline bvec_alloc
  block: factor out a bvec_alloc_gfp helper
  block: move struct biovec_slab to bio.c
  block: reuse BIO_INLINE_VECS for integrity bvecs
  ...
2021-02-21 11:02:48 -08:00
Linus Torvalds
24880bef41 Remove oprofile and dcookies support
The "oprofile" user-space tools don't use the kernel OPROFILE support any more,
 and haven't in a long time. User-space has been converted to the perf
 interfaces.
 
 The dcookies stuff is only used by the oprofile code. Now that oprofile's
 support is getting removed from the kernel, there is no need for dcookies as
 well.
 
 Remove kernel's old oprofile and dcookies support.
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Merge tag 'oprofile-removal-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/linux

Pull oprofile and dcookies removal from Viresh Kumar:
 "Remove oprofile and dcookies support

  The 'oprofile' user-space tools don't use the kernel OPROFILE support
  any more, and haven't in a long time. User-space has been converted to
  the perf interfaces.

  The dcookies stuff is only used by the oprofile code. Now that
  oprofile's support is getting removed from the kernel, there is no
  need for dcookies as well.

  Remove kernel's old oprofile and dcookies support"

* tag 'oprofile-removal-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/linux:
  fs: Remove dcookies support
  drivers: Remove CONFIG_OPROFILE support
  arch: xtensa: Remove CONFIG_OPROFILE support
  arch: x86: Remove CONFIG_OPROFILE support
  arch: sparc: Remove CONFIG_OPROFILE support
  arch: sh: Remove CONFIG_OPROFILE support
  arch: s390: Remove CONFIG_OPROFILE support
  arch: powerpc: Remove oprofile
  arch: powerpc: Stop building and using oprofile
  arch: parisc: Remove CONFIG_OPROFILE support
  arch: mips: Remove CONFIG_OPROFILE support
  arch: microblaze: Remove CONFIG_OPROFILE support
  arch: ia64: Remove rest of perfmon support
  arch: ia64: Remove CONFIG_OPROFILE support
  arch: hexagon: Don't select HAVE_OPROFILE
  arch: arc: Remove CONFIG_OPROFILE support
  arch: arm: Remove CONFIG_OPROFILE support
  arch: alpha: Remove CONFIG_OPROFILE support
2021-02-21 10:40:34 -08:00
Linus Torvalds
b52bb135aa New code for 5.12:
- Fix an ABBA deadlock when renaming files on overlayfs.
 - Make sure that we can't overflow the inode extent counters when adding
   to or removing extents from a file.
 - Make directory sgid inheritance work the same way as all the other
   filesystems.
 - Don't drain the buffer cache on freeze and ro remount, which should
   reduce the amount of time if read-only workloads are continuing
   during the freeze.
 - Fix a bug where symlink size isn't reported to the vfs in ecryptfs.
 - Disentangle log cleaning from log covering.  This refactoring sets us
   up for future changes to the log, though for now it simply means that
   we can use covering for freezes, and cleaning becomes something we
   only do at unmount.
 - Speed up file fsyncs by reducing iolock cycling.
 - Fix delalloc blocks leaking when changing the project id fails because
   of input validation errors in FSSETXATTR.
 - Fix oversized quota reservation when converting unwritten extents
   during a DAX write.
 - Create a transaction allocation helper function to standardize the
   idiom of allocating a transaction, reserving blocks, locking inodes,
   and reserving quota.  Replace all the open-coded logic for file
   creation, file ownership changes, and file modifications to use them.
 - Actually shut down the fs if the incore quota reservations get
   corrupted.
 - Fix background block garbage collection scans to not block and to
   actually clean out CoW staging extents properly.
 - Run block gc scans when we run low on project quota.
 - Use the standardized transaction allocation helpers to make it so that
   ENOSPC and EDQUOT errors during reservation will back out, invoke the
   block gc scanner, and try again.  This is preparation for introducing
   background inode garbage collection in the next cycle.
 - Combine speculative post-EOF block garbage collection with speculative
   copy on write block garbage collection.
 - Enable multithreaded quotacheck.
 - Allow sysadmins to tweak the CPU affinities and maximum concurrency
   levels of quotacheck and background blockgc worker pools.
 - Expose the inode btree counter feature in the fs geometry ioctl.
 - Cleanups of the growfs code in preparation for starting work on
   filesystem shrinking.
 - Fix all the bloody gcc warnings that the maintainer knows about. :P
 - Fix a RST syntax error.
 - Don't trigger bmbt corruption assertions after the fs shuts down.
 - Restore behavior of forcing SIGBUS on a shut down filesystem when
   someone triggers a mmap write fault (or really, any buffered write).
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Merge tag 'xfs-5.12-merge-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs updates from Darrick Wong:
 "There's a lot going on this time, which seems about right for this
  drama-filled year.

  Community developers added some code to speed up freezing when
  read-only workloads are still running, refactored the logging code,
  added checks to prevent file extent counter overflow, reduced iolock
  cycling to speed up fsync and gc scans, and started the slow march
  towards supporting filesystem shrinking.

  There's a huge refactoring of the internal speculative preallocation
  garbage collection code which fixes a bunch of bugs, makes the gc
  scheduling per-AG and hence multithreaded, and standardizes the retry
  logic when we try to reserve space or quota, can't, and want to
  trigger a gc scan. We also enable multithreaded quotacheck to reduce
  mount times further. This is also preparation for background file gc,
  which may or may not land for 5.13.

  We also fixed some deadlocks in the rename code, fixed a quota
  accounting leak when FSSETXATTR fails, restored the behavior that
  write faults to an mmap'd region actually cause a SIGBUS, fixed a bug
  where sgid directory inheritance wasn't quite working properly, and
  fixed a bug where symlinks weren't working properly in ecryptfs. We
  also now advertise the inode btree counters feature that was
  introduced two cycles ago.

  Summary:

   - Fix an ABBA deadlock when renaming files on overlayfs.

   - Make sure that we can't overflow the inode extent counters when
     adding to or removing extents from a file.

   - Make directory sgid inheritance work the same way as all the other
     filesystems.

   - Don't drain the buffer cache on freeze and ro remount, which should
     reduce the amount of time if read-only workloads are continuing
     during the freeze.

   - Fix a bug where symlink size isn't reported to the vfs in ecryptfs.

   - Disentangle log cleaning from log covering. This refactoring sets
     us up for future changes to the log, though for now it simply means
     that we can use covering for freezes, and cleaning becomes
     something we only do at unmount.

   - Speed up file fsyncs by reducing iolock cycling.

   - Fix delalloc blocks leaking when changing the project id fails
     because of input validation errors in FSSETXATTR.

   - Fix oversized quota reservation when converting unwritten extents
     during a DAX write.

   - Create a transaction allocation helper function to standardize the
     idiom of allocating a transaction, reserving blocks, locking
     inodes, and reserving quota. Replace all the open-coded logic for
     file creation, file ownership changes, and file modifications to
     use them.

   - Actually shut down the fs if the incore quota reservations get
     corrupted.

   - Fix background block garbage collection scans to not block and to
     actually clean out CoW staging extents properly.

   - Run block gc scans when we run low on project quota.

   - Use the standardized transaction allocation helpers to make it so
     that ENOSPC and EDQUOT errors during reservation will back out,
     invoke the block gc scanner, and try again. This is preparation for
     introducing background inode garbage collection in the next cycle.

   - Combine speculative post-EOF block garbage collection with
     speculative copy on write block garbage collection.

   - Enable multithreaded quotacheck.

   - Allow sysadmins to tweak the CPU affinities and maximum concurrency
     levels of quotacheck and background blockgc worker pools.

   - Expose the inode btree counter feature in the fs geometry ioctl.

   - Cleanups of the growfs code in preparation for starting work on
     filesystem shrinking.

   - Fix all the bloody gcc warnings that the maintainer knows about. :P

   - Fix a RST syntax error.

   - Don't trigger bmbt corruption assertions after the fs shuts down.

   - Restore behavior of forcing SIGBUS on a shut down filesystem when
     someone triggers a mmap write fault (or really, any buffered
     write)"

* tag 'xfs-5.12-merge-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (85 commits)
  xfs: consider shutdown in bmapbt cursor delete assert
  xfs: fix boolreturn.cocci warnings
  xfs: restore shutdown check in mapped write fault path
  xfs: fix rst syntax error in admin guide
  xfs: fix incorrect root dquot corruption error when switching group/project quota types
  xfs: get rid of xfs_growfs_{data,log}_t
  xfs: rename `new' to `delta' in xfs_growfs_data_private()
  libxfs: expose inobtcount in xfs geometry
  xfs: don't bounce the iolock between free_{eof,cow}blocks
  xfs: expose the blockgc workqueue knobs publicly
  xfs: parallelize block preallocation garbage collection
  xfs: rename block gc start and stop functions
  xfs: only walk the incore inode tree once per blockgc scan
  xfs: consolidate the eofblocks and cowblocks workers
  xfs: consolidate incore inode radix tree posteof/cowblocks tags
  xfs: remove trivial eof/cowblocks functions
  xfs: hide xfs_icache_free_cowblocks
  xfs: hide xfs_icache_free_eofblocks
  xfs: relocate the eofb/cowb workqueue functions
  xfs: set WQ_SYSFS on all workqueues in debug mode
  ...
2021-02-21 10:34:36 -08:00
Linus Torvalds
4f016a316f New code for 5.12:
- Adjust the final parameter of iomap_dio_rw.
 - Add a new flag to request that iomap directio writes return EAGAIN if
   the write is not a pure overwrite within EOF; this will be used to
   reduce lock contention with unaligned direct writes on XFS.
 - Amend XFS' directio code to eliminate exclusive locking for unaligned
   direct writes if the circumstances permit
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Merge tag 'iomap-5.12-merge-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull iomap updates from Darrick Wong:
 "The big change in this cycle is some new code to make it possible for
  XFS to try unaligned directio overwrites without taking locks. If the
  block is fully written and within EOF (i.e. doesn't require any
  further fs intervention) then we can let the unlocked write proceed.
  If not, we fall back to synchronizing direct writes.

  Summary:

   - Adjust the final parameter of iomap_dio_rw.

   - Add a new flag to request that iomap directio writes return EAGAIN
     if the write is not a pure overwrite within EOF; this will be used
     to reduce lock contention with unaligned direct writes on XFS.

   - Amend XFS' directio code to eliminate exclusive locking for
     unaligned direct writes if the circumstances permit"

* tag 'iomap-5.12-merge-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: reduce exclusive locking on unaligned dio
  xfs: split the unaligned DIO write code out
  xfs: improve the reflink_bounce_dio_write tracepoint
  xfs: simplify the read/write tracepoints
  xfs: remove the buffered I/O fallback assert
  xfs: cleanup the read/write helper naming
  xfs: make xfs_file_aio_write_checks IOCB_NOWAIT-aware
  xfs: factor out a xfs_ilock_iocb helper
  iomap: add a IOMAP_DIO_OVERWRITE_ONLY flag
  iomap: pass a flags argument to iomap_dio_rw
  iomap: rename the flags variable in __iomap_dio_rw
2021-02-21 10:29:20 -08:00
Linus Torvalds
f02361639a pstore update for v5.12-rc1
- Fix a CONFIG typo (Jiri Bohac)
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Merge tag 'pstore-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull pstore fix from Kees Cook:
 "Fix a CONFIG typo (Jiri Bohac)"

* tag 'pstore-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  pstore: Fix typo in compression option name
2021-02-21 10:27:13 -08:00
Linus Torvalds
f7b36dc5cb fsverity updates for 5.12
Add an ioctl which allows reading fs-verity metadata from a file.
 
 This is useful when a file with fs-verity enabled needs to be served
 somewhere, and the other end wants to do its own fs-verity compatible
 verification of the file.  See the commit messages for details.
 
 This new ioctl has been tested using new xfstests I've written for it.
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Merge tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt

Pull fsverity updates from Eric Biggers:
 "Add an ioctl which allows reading fs-verity metadata from a file.

  This is useful when a file with fs-verity enabled needs to be served
  somewhere, and the other end wants to do its own fs-verity compatible
  verification of the file. See the commit messages for details.

  This new ioctl has been tested using new xfstests I've written for it"

* tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt:
  fs-verity: support reading signature with ioctl
  fs-verity: support reading descriptor with ioctl
  fs-verity: support reading Merkle tree with ioctl
  fs-verity: add FS_IOC_READ_VERITY_METADATA ioctl
  fs-verity: don't pass whole descriptor to fsverity_verify_signature()
  fs-verity: factor out fsverity_get_descriptor()
2021-02-21 10:25:24 -08:00
Linus Torvalds
99f1a5872b Highlights:
- Update NFSv2 and NFSv3 XDR decoding functions
 - Further improve support for re-exporting NFS mounts
 - Convert NFSD stats to per-CPU counters
 - Add batch Receive posting to the server's RPC/RDMA transport
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Merge tag 'nfsd-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd updates from Chuck Lever:

 - Update NFSv2 and NFSv3 XDR decoding functions

 - Further improve support for re-exporting NFS mounts

 - Convert NFSD stats to per-CPU counters

 - Add batch Receive posting to the server's RPC/RDMA transport

* tag 'nfsd-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: (65 commits)
  nfsd: skip some unnecessary stats in the v4 case
  nfs: use change attribute for NFS re-exports
  NFSv4_2: SSC helper should use its own config.
  nfsd: cstate->session->se_client -> cstate->clp
  nfsd: simplify nfsd4_check_open_reclaim
  nfsd: remove unused set_client argument
  nfsd: find_cpntf_state cleanup
  nfsd: refactor set_client
  nfsd: rename lookup_clientid->set_client
  nfsd: simplify nfsd_renew
  nfsd: simplify process_lock
  nfsd4: simplify process_lookup1
  SUNRPC: Correct a comment
  svcrdma: DMA-sync the receive buffer in svc_rdma_recvfrom()
  svcrdma: Reduce Receive doorbell rate
  svcrdma: Deprecate stat variables that are no longer used
  svcrdma: Restore read and write stats
  svcrdma: Convert rdma_stat_sq_starve to a per-CPU counter
  svcrdma: Convert rdma_stat_recv to a per-CPU counter
  svcrdma: Refactor svc_rdma_init() and svc_rdma_clean_up()
  ...
2021-02-21 10:22:20 -08:00
Linus Torvalds
681e2abe21 Changes since last update:
- fix shift-out-of-bounds of crafted blkszbits generated by syzkaller;
 
  - ensure initialized fields can only be observed after bit is set.
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Merge tag 'erofs-for-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs

Pull erofs updates from Gao Xiang:
 "This contains a somewhat important but rarely reproduced fix reported
  month ago for platforms which have weak memory model (e.g. arm64).

  The root cause is that test_bit/set_bit atomic operations are actually
  implemented in relaxed forms, and uninitialized fields governed by an
  atomic bit could be observed in advance due to memory reordering thus
  memory barrier pairs should be used.

  There is also a trivial fix of crafted blkszbits generated by
  syzkaller.

  Summary:

   - fix shift-out-of-bounds of crafted blkszbits generated by syzkaller

   - ensure initialized fields can only be observed after bit is set"

* tag 'erofs-for-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
  erofs: initialized fields can only be observed after bit is set
  erofs: fix shift-out-of-bounds of blkszbits
2021-02-21 10:19:34 -08:00
Linus Torvalds
8b42fe123b f2fs-for-5.12-rc1
We've added two major features: 1) compression level and 2) checkpoint_merge, in
 this round. 1) compression level expands 'compress_algorithm' mount option to
 accept parameter as format of <algorithm>:<level>, by this way, it gives a way
 to allow user to do more specified config on lz4 and zstd compression level,
 then f2fs compression can provide higher compress ratio. 2) checkpoint_merge
 creates a kernel daemon and makes it to merge concurrent checkpoint requests as
 much as possible to eliminate redundant checkpoint issues. Plus, we can
 eliminate the sluggish issue caused by slow checkpoint operation when the
 checkpoint is done in a process context in a cgroup having low i/o budget and
 cpu shares.
 
 Enhancement:
  - add compress level for lz4 and zstd in mount option
  - checkpoint_merge mount option
  - deprecate f2fs_trace_io
 
 Bug fix:
  - flush data when enabling checkpoint back
  - handle corner cases of mount options
  - missing ACL update and lock for I_LINKABLE flag
  - attach FIEMAP_EXTENT_MERGED in f2fs_fiemap
  - fix potential deadlock in compression flow
  - fix wrong submit_io condition
 
 As usual, we've cleaned up many code flows and fixed minor bugs.
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Merge tag 'f2fs-for-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

Pull f2fs updates from Jaegeuk Kim:
 "We've added two major features: 1) compression level and 2)
  checkpoint_merge, in this round.

  Compression level expands 'compress_algorithm' mount option to accept
  parameter as format of <algorithm>:<level>, by this way, it gives a
  way to allow user to do more specified config on lz4 and zstd
  compression level, then f2fs compression can provide higher compress
  ratio.

  checkpoint_merge creates a kernel daemon and makes it to merge
  concurrent checkpoint requests as much as possible to eliminate
  redundant checkpoint issues. Plus, we can eliminate the sluggish issue
  caused by slow checkpoint operation when the checkpoint is done in a
  process context in a cgroup having low i/o budget and cpu shares.

  Enhancements:
   - add compress level for lz4 and zstd in mount option
   - checkpoint_merge mount option
   - deprecate f2fs_trace_io

  Bug fixes:
   - flush data when enabling checkpoint back
   - handle corner cases of mount options
   - missing ACL update and lock for I_LINKABLE flag
   - attach FIEMAP_EXTENT_MERGED in f2fs_fiemap
   - fix potential deadlock in compression flow
   - fix wrong submit_io condition

  As usual, we've cleaned up many code flows and fixed minor bugs"

* tag 'f2fs-for-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (32 commits)
  Documentation: f2fs: fix typo s/automaic/automatic
  f2fs: give a warning only for readonly partition
  f2fs: don't grab superblock freeze for flush/ckpt thread
  f2fs: add ckpt_thread_ioprio sysfs node
  f2fs: introduce checkpoint_merge mount option
  f2fs: relocate inline conversion from mmap() to mkwrite()
  f2fs: fix a wrong condition in __submit_bio
  f2fs: remove unnecessary initialization in xattr.c
  f2fs: fix to avoid inconsistent quota data
  f2fs: flush data when enabling checkpoint back
  f2fs: deprecate f2fs_trace_io
  f2fs: Remove readahead collision detection
  f2fs: remove unused stat_{inc, dec}_atomic_write
  f2fs: introduce sb_status sysfs node
  f2fs: fix to use per-inode maxbytes
  f2fs: compress: fix potential deadlock
  libfs: unexport generic_ci_d_compare() and generic_ci_d_hash()
  f2fs: fix to set/clear I_LINKABLE under i_lock
  f2fs: fix null page reference in redirty_blocks
  f2fs: clean up post-read processing
  ...
2021-02-21 10:09:32 -08:00
Linus Torvalds
6f3952cbe0 for-5.12-tag
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Merge tag 'for-5.12-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs updates from David Sterba:
 "This brings updates of space handling, performance improvements or bug
  fixes. The subpage block size and zoned mode features have reached
  state where they're usable but with limitations.

  Performance or related:

   - do not block on deleted block group mutex in the cleaner, avoids
     some long stalls

   - improved flushing: make it work better with ticket space
     reservations and avoid excessive transaction commits in some
     scenarios, slightly improves throughput for random write load

   - preemptive background flushing: separate the logic from ticket
     reservations, improve the accounting and decisions when to flush in
     low space conditions

   - less lock contention related to running delayed refs, let just one
     thread do the flushing when there are many inside transaction
     commit

   - dbench workload improvements: avoid unnecessary work when logging
     inodes, fewer fallbacks to transaction commit and thus less waiting
     for it (+7% throughput, -20% latency)

  Core:

   - subpage block size
      - currently read-only support
      - refactor and generalize code where sectorsize is assumed to be
        page size, add the subpage handling everywhere
      - the read-write support is on the way, page sizes are still
        limited to 4K or 64K

   - zoned mode, first working version but with limitations
      - SMR/ZBC/ZNS friendly allocation mode, utilizing the "no fixed
        location for structures" and chunked allocation
      - superblock as the only fixed data structure needs special
        handling, uses 2 consecutive zones as a ring buffer
      - tree-log support with a dedicated block group to avoid unordered
        writes
      - emulated zones on non-zoned devices
      - not yet working
      - all non-single block group profiles, requires more zone write
        pointer synchronization between the multiple block groups
      - fitrim due to dependency on space cache, can be implemented

  Fixes:

   - ref-verify: proper tree owner and node level tracking

   - fix pinned byte accounting, causing some early ENOSPC now more
     likely due to other changes in delayed refs

  Other:

   - error handling fixes and improvements

   - more error injection points

   - more function documentation

   - more and updated tracepoints

   - subset of W=1 checked by default

   - update comments to allow more automatic kdoc parameter checks"

* tag 'for-5.12-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (144 commits)
  btrfs: zoned: enable to mount ZONED incompat flag
  btrfs: zoned: deal with holes writing out tree-log pages
  btrfs: zoned: reorder log node allocation on zoned filesystem
  btrfs: zoned: serialize log transaction on zoned filesystems
  btrfs: zoned: extend zoned allocator to use dedicated tree-log block group
  btrfs: split alloc_log_tree()
  btrfs: zoned: relocate block group to repair IO failure in zoned filesystems
  btrfs: zoned: enable relocation on a zoned filesystem
  btrfs: zoned: support dev-replace in zoned filesystems
  btrfs: zoned: implement copying for zoned device-replace
  btrfs: zoned: implement cloning for zoned device-replace
  btrfs: zoned: mark block groups to copy for device-replace
  btrfs: zoned: do not use async metadata checksum on zoned filesystems
  btrfs: zoned: wait for existing extents before truncating
  btrfs: zoned: serialize metadata IO
  btrfs: zoned: introduce dedicated data write path for zoned filesystems
  btrfs: zoned: enable zone append writing for direct IO
  btrfs: zoned: use ZONE_APPEND write for zoned mode
  btrfs: save irq flags when looking up an ordered extent
  btrfs: zoned: cache if block group is on a sequential zone
  ...
2021-02-21 10:00:39 -08:00
Linus Torvalds
f9d58de231 affs-for-5.12-tag
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Merge tag 'affs-for-5.12-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull AFFS fix from David Sterba:
 "One minor fix for error handling in rename exchange"

* tag 'affs-for-5.12-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  fs/affs: release old buffer head on error path
2021-02-21 09:59:09 -08:00
Linus Torvalds
d88e8b67a6 A few jfs fixes
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Merge tag 'jfs-5.12' of git://github.com/kleikamp/linux-shaggy

Pull jfs updates from David Kleikamp:
 "A few jfs fixes"

* tag 'jfs-5.12' of git://github.com/kleikamp/linux-shaggy:
  fs/jfs: fix potential integer overflow on shift of a int
  jfs: turn diLog(), dataLog() and txLog() into void functions
  JFS: more checks for invalid superblock
2021-02-21 09:57:30 -08:00
Linus Torvalds
961a9b512d fcntl() fix for v5.12
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Merge tag 'locks-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux

Pull fcntl fix from Jeff Layton.

* tag 'locks-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux:
  fcntl: make F_GETOWN(EX) return 0 on dead owner task
2021-02-21 09:54:02 -08:00
Linus Torvalds
c57b1f0a5f Merge branch 'work.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull namei updates from Al Viro:
 "Most of that pile is LOOKUP_CACHED series; the rest is a couple of
  misc cleanups in the general area...

  There's a minor bisect hazard in the end of series, and normally I
  would've just folded the fix into the previous commit, but this branch
  is shared with Jens' tree, with stuff on top of it in there, so that
  would've required rebases outside of vfs.git"

* 'work.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fix handling of nd->depth on LOOKUP_CACHED failures in try_to_unlazy*
  fs: expose LOOKUP_CACHED through openat2() RESOLVE_CACHED
  fs: add support for LOOKUP_CACHED
  saner calling conventions for unlazy_child()
  fs: make unlazy_walk() error handling consistent
  fs/namei.c: Remove unlikely of status being -ECHILD in lookup_fast()
  do_tmpfile(): don't mess with finish_open()
2021-02-21 09:42:18 -08:00
Linus Torvalds
591fd30eee Merge branch 'work.elf-compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull ELF compat updates from Al Viro:
 "Sanitizing ELF compat support, especially for triarch architectures:

   - X32 handling cleaned up

   - MIPS64 uses compat_binfmt_elf.c both for O32 and N32 now

   - Kconfig side of things regularized

  Eventually I hope to have compat_binfmt_elf.c killed, with both native
  and compat built from fs/binfmt_elf.c, with -DELF_BITS={64,32} passed
  by kbuild, but that's a separate story - not included here"

* 'work.elf-compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  get rid of COMPAT_ELF_EXEC_PAGESIZE
  compat_binfmt_elf: don't bother with undef of ELF_ARCH
  Kconfig: regularize selection of CONFIG_BINFMT_ELF
  mips compat: switch to compat_binfmt_elf.c
  mips: don't bother with ELF_CORE_EFLAGS
  mips compat: don't bother with ELF_ET_DYN_BASE
  mips: KVM_GUEST makes no sense for 64bit builds...
  mips: kill unused definitions in binfmt_elf[on]32.c
  mips binfmt_elf*32.c: use elfcore-compat.h
  x32: make X32, !IA32_EMULATION setups able to execute x32 binaries
  [amd64] clean PRSTATUS_SIZE/SET_PR_FPVALID up properly
  elf_prstatus: collect the common part (everything before pr_reg) into a struct
  binfmt_elf: partially sanitize PRSTATUS_SIZE and SET_PR_FPVALID
2021-02-21 09:29:23 -08:00
Linus Torvalds
054560e961 Merge branch 'work.sendfile' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull sendfile updates from Al Viro:
 "Make sendfile() to pipe destination do the right thing, should make
  'fs/pipe: allow sendfile() to pipe again' redundant"

* 'work.sendfile' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  teach sendfile(2) to handle send-to-pipe directly
  take the guts of file-to-pipe splice into a helper function
  do_splice_to(): move the logics for limiting the read length in
2021-02-21 09:25:32 -08:00
Linus Torvalds
584ce3c9b4 SoC platform removal
There are a lot of platforms that have not seen any interesting code
 changes in the past five years or more.
 
 I made a list and asked around which ones are no longer in use [1], and
 received confirmation about six ARM platforms and the TI C6x architecture
 that have all reached the end of their life upstream, with no known
 users remaining:
 
  - efm32 -- added in 2011, first Cortex-M, no notable changes after 2013
  - picoxcell -- added in 2011, abandoned after 2012 acquisition
  - prima2 -- added in 20111, no notable changes since 2015
  - tango -- added in 2015, sporadic changes until 2017, but abandoned
  - u300 -- added in 2009, no notable changes since 2013
  - zx --added in 2015 for both 32, 2017 for 64 bit, no notable changes
  - arch/c6x -- added in 2011, but work stalled soon after that
 
 A number of other platforms on the original list turned out to still
 have users. In some cases there are out-of-tree patches and users
 that plan to contribute them in the future, in other cases the code
 is complete and works reliably.
 
 [1] https://lore.kernel.org/lkml/CAK8P3a2DZ8xQp7R=H=wewHnT2=a_=M53QsZOueMVEf7tOZLKNg@mail.gmail.com/
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'arm-platform-removal-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC platform removals from Arnd Bergmann:
 "There are a lot of platforms that have not seen any interesting code
  changes in the past five years or more.

  I made a list and asked around which ones are no longer in use, and
  received confirmation about six ARM platforms and the TI C6x
  architecture that have all reached the end of their life upstream,
  with no known users remaining:

   - efm32 - added in 2011, first Cortex-M, no notable changes after 2013

   - picoxcell - added in 2011, abandoned after 2012 acquisition

   - prima2 - added in 20111, no notable changes since 2015

   - tango - added in 2015, sporadic changes until 2017, but abandoned

   - u300 - added in 2009, no notable changes since 2013

   - zx - added in 2015 for both 32, 2017 for 64 bit, no notable changes

   - arch/c6x - added in 2011, but work stalled soon after that

  A number of other platforms on the original list turned out to still
  have users. In some cases there are out-of-tree patches and users that
  plan to contribute them in the future, in other cases the code is
  complete and works reliably"

Link: https://lore.kernel.org/lkml/CAK8P3a2DZ8xQp7R=H=wewHnT2=a_=M53QsZOueMVEf7tOZLKNg@mail.gmail.com/

* tag 'arm-platform-removal-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  ARM: remove u300 platform
  ARM: remove tango platform
  ARM: remove zte zx platform
  ARM: remove sirf prima2/atlas platforms
  c6x: remove architecture
  MAINTAINERS: Remove deleted platform efm32
  ARM: drop efm32 platform
  ARM: Remove PicoXcell platform support
  ARM: dts: Remove PicoXcell platforms
2021-02-20 18:16:30 -08:00
Al Viro
eacd9aa8ce fix handling of nd->depth on LOOKUP_CACHED failures in try_to_unlazy*
After switching to non-RCU mode, we want nd->depth to match the number
of entries in nd->stack[] that need eventual path_put().
legitimize_links() takes care of that on failures; unfortunately,
failure exits added for LOOKUP_CACHED do not.

We could add the logics for that into those failure exits, both in
try_to_unlazy() and in try_to_unlazy_next(), but since both checks
are immediately followed by legitimize_links() and there's no calls
of legitimize_links() other than those two...  It's easier to
move the check (and required handling of nd->depth on failure) into
legitimize_links() itself.

[caught by Jens: ... and since we are zeroing ->depth here, we need
to do drop_links() first]

Fixes: 6c6ec2b0a3 "fs: add support for LOOKUP_CACHED"
Tested-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2021-02-20 12:33:12 -05:00
Jiri Bohac
19d8e9149c pstore: Fix typo in compression option name
Both pstore_compress() and decompress_record() use a mistyped config
option name ("PSTORE_COMPRESSION" instead of "PSTORE_COMPRESS"). As
a result compression and decompression of pstore records was always
disabled.

Use the correct config option name.

Signed-off-by: Jiri Bohac <jbohac@suse.cz>
Fixes: fd49e03280 ("pstore: Fix linking when crypto API disabled")
Acked-by: Matteo Croce <mcroce@microsoft.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210218111547.johvp5klpv3xrpnn@dwarf.suse.cz
2021-02-18 12:27:49 -08:00
Shin'ichiro Kawasaki
059c01039c zonefs: Fix file size of zones in full condition
Per ZBC/ZAC/ZNS specifications, write pointers may not have valid values
when zones are in full condition. However, when zonefs mounts a zoned
block device, zonefs refers write pointers to set file size even when
the zones are in full condition. This results in wrong file size. To fix
this, refer maximum file size in place of write pointers for zones in
full condition.

Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Fixes: 8dcc1a9d90 ("fs: New zonefs file system")
Cc: <stable@vger.kernel.org> # 5.6+
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
2021-02-18 08:36:40 +09:00
Jens Axboe
0b81e80c81 io_uring: tctx->task_lock should be IRQ safe
We add task_work from any context, hence we need to ensure that we can
tolerate it being from IRQ context as well.

Fixes: 7cbf1722d5 ("io_uring: provide FIFO ordering for task_work")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-02-16 11:11:20 -07:00
Xiubo Li
558b4510f6 ceph: defer flushing the capsnap if the Fb is used
If the Fb cap is used it means the current inode is flushing the
dirty data to OSD, just defer flushing the capsnap.

URL: https://tracker.ceph.com/issues/48640
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2021-02-16 12:09:52 +01:00
Jeff Layton
a8810cdc00 ceph: allow queueing cap/snap handling after putting cap references
Testing with the fscache overhaul has triggered some lockdep warnings
about circular lock dependencies involving page_mkwrite and the
mmap_lock. It'd be better to do the "real work" without the mmap lock
being held.

Change the skip_checking_caps parameter in __ceph_put_cap_refs to an
enum, and use that to determine whether to queue check_caps, do it
synchronously or not at all. Change ceph_page_mkwrite to do a
ceph_put_cap_refs_async().

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2021-02-16 12:09:51 +01:00
Jeff Layton
64f28c627a ceph: clean up inode work queueing
Add a generic function for taking an inode reference, setting the I_WORK
bit and queueing i_work. Turn the ceph_queue_* functions into static
inline wrappers that pass in the right bit.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2021-02-16 12:09:51 +01:00
Jeff Layton
64f36da562 ceph: fix flush_snap logic after putting caps
A primary reason for skipping ceph_check_caps after putting the
references was to avoid the locking in ceph_check_caps during a
reconnect. __ceph_put_cap_refs can still call ceph_flush_snaps in that
case though, and that takes many of the same inconvenient locks.

Fix the logic in __ceph_put_cap_refs to skip flushing snaps when the
skip_checking_caps flag is set.

Fixes: e64f44a884 ("ceph: skip checking caps when session reconnecting and releasing reqs")
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2021-02-16 12:09:51 +01:00
Chris Wilson
bfe3911a91 kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE
Userspace has discovered the functionality offered by SYS_kcmp and has
started to depend upon it. In particular, Mesa uses SYS_kcmp for
os_same_file_description() in order to identify when two fd (e.g. device
or dmabuf) point to the same struct file. Since they depend on it for
core functionality, lift SYS_kcmp out of the non-default
CONFIG_CHECKPOINT_RESTORE into the selectable syscall category.

Rasmus Villemoes also pointed out that systemd uses SYS_kcmp to
deduplicate the per-service file descriptor store.

Note that some distributions such as Ubuntu are already enabling
CHECKPOINT_RESTORE in their configs and so, by extension, SYS_kcmp.

References: https://gitlab.freedesktop.org/drm/intel/-/issues/3046
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Will Drewry <wad@chromium.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Dave Airlie <airlied@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: stable@vger.kernel.org
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> # DRM depends on kcmp
Acked-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> # systemd uses kcmp
Reviewed-by: Cyrill Gorcunov <gorcunov@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210205220012.1983-1-chris@chris-wilson.co.uk
2021-02-16 09:59:41 +01:00
Johannes Thumshirn
62ab1aadcc zonefs: add tracepoints for file operations
Add tracepoints for file I/O operations to aid in debugging of I/O errors
with zonefs.

The added tracepoints are in:
- zonefs_zone_mgmt() for tracing zone management operations
- zonefs_iomap_begin() for tracing regular file I/O
- zonefs_file_dio_append() for tracing zone-append operations

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
2021-02-16 09:59:54 +09:00