linux-stable.git/fs/fuse, branch v4.7.7

fuse: direct-io: don't dirty ITER_BVEC pages

2016-09-24T08:09:35+00:00

commit 8fba54aebbdf1f999738121922e74bf796ad60ee upstream.

When reading from a loop device backed by a fuse file it deadlocks on
lock_page().

This is because the page is already locked by the read() operation done on
the loop device.  In this case we don't want to either lock the page or
dirty it.

So do what fs/direct-io.c does: only dirty the page for ITER_IOVEC vectors.

Reported-by: Sheng Yang 
Fixes: aa4d86163e4e ("block: loop: switch to VFS ITER_BVEC")
Signed-off-by: Miklos Szeredi 
Reviewed-by: Sheng Yang 
Reviewed-by: Ashish Samant 
Tested-by: Sheng Yang 
Tested-by: Ashish Samant 
Signed-off-by: Greg Kroah-Hartman

fuse: fix wrong assignment of ->flags in fuse_send_init()

2016-08-16T07:34:59+00:00

commit 9446385f05c9af25fed53dbed3cc75763730be52 upstream.

FUSE_HAS_IOCTL_DIR should be assigned to ->flags, it may be a typo.

Signed-off-by: Wei Fang 
Signed-off-by: Miklos Szeredi 
Fixes: 69fe05c90ed5 ("fuse: add missing INIT flags")
Signed-off-by: Greg Kroah-Hartman

fuse: fuse_flush must check mapping->flags for errors

2016-08-16T07:34:59+00:00

commit 9ebce595f63a407c5cec98f98f9da8459b73740a upstream.

fuse_flush() calls write_inode_now() that triggers writeback, but actual
writeback will happen later, on fuse_sync_writes(). If an error happens,
fuse_writepage_end() will set error bit in mapping->flags. So, we have to
check mapping->flags after fuse_sync_writes().

Signed-off-by: Maxim Patlasov 
Signed-off-by: Miklos Szeredi 
Fixes: 4d99ff8f12eb ("fuse: Turn writeback cache on")
Signed-off-by: Greg Kroah-Hartman

fuse: fsync() did not return IO errors

2016-08-16T07:34:59+00:00

commit ac7f052b9e1534c8248f814b6f0068ad8d4a06d2 upstream.

Due to implementation of fuse writeback filemap_write_and_wait_range() does
not catch errors. We have to do this directly after fuse_sync_writes()

Signed-off-by: Alexey Kuznetsov 
Signed-off-by: Maxim Patlasov 
Signed-off-by: Miklos Szeredi 
Fixes: 4d99ff8f12eb ("fuse: Turn writeback cache on")
Signed-off-by: Greg Kroah-Hartman

Use the right predicate in ->atomic_open() instances

2016-07-05T20:02:23+00:00

->atomic_open() can be given an in-lookup dentry *or* a negative one
found in dcache.  Use d_in_lookup() to tell one from another, rather
than d_unhashed().

Signed-off-by: Al Viro

fuse: serialize dirops by default

2016-06-30T11:10:49+00:00

Negotiate with userspace filesystems whether they support parallel readdir
and lookup.  Disable parallelism by default for fear of breaking fuse
filesystems.

Signed-off-by: Miklos Szeredi 
Fixes: 9902af79c01a ("parallel lookups: actual switch to rwsem")
Fixes: d9b3dbdcfd62 ("fuse: switch to ->iterate_shared()")

switch ->setxattr() to passing dentry and inode separately

2016-05-28T00:09:16+00:00

smack ->d_instantiate() uses ->setxattr(), so to be able to call it before
we'd hashed the new dentry and attached it to inode, we need ->setxattr()
instances getting the inode as an explicit argument rather than obtaining
it from dentry.

Similar change for ->getxattr() had been done in commit ce23e64.  Unlike
->getxattr() (which is used by both selinux and smack instances of
->d_instantiate()) ->setxattr() is used only by smack one and unfortunately
it got missed back then.

Reported-by: Seung-Woo Kim 
Tested-by: Casey Schaufler 
Signed-off-by: Al Viro

Merge branch 'work.preadv2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2016-05-17T22:05:23+00:00

Pull vfs cleanups from Al Viro:
 "More cleanups from Christoph"

* 'work.preadv2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  nfsd: use RWF_SYNC
  fs: add RWF_DSYNC aand RWF_SYNC
  ceph: use generic_write_sync
  fs: simplify the generic_write_sync prototype
  fs: add IOCB_SYNC and IOCB_DSYNC
  direct-io: remove the offset argument to dio_complete
  direct-io: eliminate the offset argument to ->direct_IO
  xfs: eliminate the pos variable in xfs_file_dio_aio_write
  filemap: remove the pos argument to generic_file_direct_write
  filemap: remove pos variables in generic_file_read_iter

Merge branch 'ovl-fixes' into for-linus

2016-05-17T06:17:59+00:00

Backmerge to resolve a conflict in ovl_lookup_real();
"ovl_lookup_real(): use lookup_one_len_unlocked()" instead,
but it was too late in the cycle to rebase.

fuse: switch to ->iterate_shared()

2016-05-02T23:49:31+00:00

Switch dcache pre-seeding on readdir to d_alloc_parallel();
nothing else is needed.

Signed-off-by: Al Viro