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  1. 01 6月, 2018 23 次提交
  3. 30 5月, 2018 5 次提交
  5. 05 5月, 2018 1 次提交
  7. 03 5月, 2018 6 次提交
    • J
      f2fs: clear PageError on writepage · 17c50035
      由 Jaegeuk Kim 提交于 
      This patch clears PageError in some pages tagged by read path, but when we
write the pages with valid contents, writepage should clear the bit likewise
ext4.
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
      17c50035
    • J
      f2fs: check cap_resource only for data blocks · a90a0884
      由 Jaegeuk Kim 提交于 
      This patch changes the rule to check cap_resource for data blocks, not inode
or node blocks in order to avoid selinux denial.
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
      a90a0884
    • J
      Revert "f2fs: introduce f2fs_set_page_dirty_nobuffer" · b87078ad
      由 Jaegeuk Kim 提交于 
      This patch reverts copied f2fs_set_page_dirty_nobuffer to use generic function
for stability.

This reverts commit fe76b796.
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
      b87078ad
    • E
      f2fs: call unlock_new_inode() before d_instantiate() · ab3835aa
      由 Eric Biggers 提交于 
      xfstest generic/429 sometimes hangs on f2fs, caused by a thread being
unable to take a directory's i_rwsem for write in vfs_rmdir().  In the
test, one thread repeatedly creates and removes a directory, and other
threads repeatedly look up a file in the directory.  The bug is that
f2fs_mkdir() calls d_instantiate() before unlock_new_inode(), resulting
in the directory inode being exposed to lookups before it has been fully
initialized.  And with CONFIG_DEBUG_LOCK_ALLOC, unlock_new_inode()
reinitializes ->i_rwsem, corrupting its state when it is already held.

Fix it by calling unlock_new_inode() before d_instantiate().  This
matches what other filesystems do.

Fixes: 57397d86 ("f2fs: add inode operations for special inodes")
Signed-off-by: NEric Biggers <ebiggers@google.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
      ab3835aa
    • E
      f2fs: refactor read path to allow multiple postprocessing steps · 6dbb1796
      由 Eric Biggers 提交于 
      Currently f2fs's ->readpage() and ->readpages() assume that either the
data undergoes no postprocessing, or decryption only.  But with
fs-verity, there will be an additional authenticity verification step,
and it may be needed either by itself, or combined with decryption.

To support this, store a 'struct bio_post_read_ctx' in ->bi_private
which contains a work struct, a bitmask of postprocessing steps that are
enabled, and an indicator of the current step.  The bio completion
routine, if there was no I/O error, enqueues the first postprocessing
step.  When that completes, it continues to the next step.  Pages that
fail any postprocessing step have PageError set.  Once all steps have
completed, pages without PageError set are set Uptodate, and all pages
are unlocked.

Also replace f2fs_encrypted_file() with a new function
f2fs_post_read_required() in places like direct I/O and garbage
collection that really should be testing whether the file needs special
I/O processing, not whether it is encrypted specifically.

This may also be useful for other future f2fs features such as
compression.
Signed-off-by: NEric Biggers <ebiggers@google.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
      6dbb1796
    • E
      fscrypt: allow synchronous bio decryption · 0cb8dae4
      由 Eric Biggers 提交于 
      Currently, fscrypt provides fscrypt_decrypt_bio_pages() which decrypts a
bio's pages asynchronously, then unlocks them afterwards.  But, this
assumes that decryption is the last "postprocessing step" for the bio,
so it's incompatible with additional postprocessing steps such as
authenticity verification after decryption.

Therefore, rename the existing fscrypt_decrypt_bio_pages() to
fscrypt_enqueue_decrypt_bio().  Then, add fscrypt_decrypt_bio() which
decrypts the pages in the bio synchronously without unlocking the pages,
nor setting them Uptodate; and add fscrypt_enqueue_decrypt_work(), which
enqueues work on the fscrypt_read_workqueue.  The new functions will be
used by filesystems that support both fscrypt and fs-verity.
Signed-off-by: NEric Biggers <ebiggers@google.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
      0cb8dae4
  9. 02 5月, 2018 4 次提交
  11. 01 5月, 2018 1 次提交
    • L
      Merge tag 'errseq-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux · fff75eb2
      由 Linus Torvalds 提交于 
      Pull errseq infrastructure fix from Jeff Layton:
 "The PostgreSQL developers recently had a spirited discussion about the
  writeback error handling in Linux, and reached out to us about a
  behavoir change to the code that bit them when the errseq_t changes
  were merged.

  When we changed to using errseq_t for tracking writeback errors, we
  lost the ability for an application to see a writeback error that
  occurred before the open on which the fsync was issued. This was
  problematic for PostgreSQL which offloads fsync calls to a completely
  separate process from the DB writers.

  This patch restores that ability. If the errseq_t value in the inode
  does not have the SEEN flag set, then we just return 0 for the sample.
  That ensures that any recorded error is always delivered at least
  once.

  Note that we might still lose the error if the inode gets evicted from
  the cache before anything can reopen it, but that was the case before
  errseq_t was merged. At LSF/MM we had some discussion about keeping
  inodes with unreported writeback errors around in the cache for longer
  (possibly indefinitely), but that's really a separate problem"

* tag 'errseq-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux:
  errseq: Always report a writeback error once
      fff75eb2