linux.git/fs/fuse/file.c, branch v5.4

fuse: redundant get_fuse_inode() calls in fuse_writepages_fill()

2019-10-23T12:26:37+00:00

Currently fuse_writepages_fill() calls get_fuse_inode() few times with
the same argument.

Signed-off-by: Vasily Averin 
Signed-off-by: Miklos Szeredi

fuse: truncate pending writes on O_TRUNC

2019-10-23T12:26:37+00:00

Make sure cached writes are not reordered around open(..., O_TRUNC), with
the obvious wrong results.

Fixes: 4d99ff8f12eb ("fuse: Turn writeback cache on")
Cc:  # v3.15+
Signed-off-by: Miklos Szeredi

fuse: kmemcg account fs data

2019-09-24T13:28:01+00:00

account per-file, dentry, and inode data

blockdev/superblock and temporary per-request data was left alone, as
this usually isn't accounted

Reviewed-by: Shakeel Butt 
Signed-off-by: Khazhismel Kumykov 
Signed-off-by: Miklos Szeredi

fuse: fix missing unlock_page in fuse_writepage()

2019-09-24T13:28:01+00:00

unlock_page() was missing in case of an already in-flight write against the
same page.

Signed-off-by: Vasily Averin 
Fixes: ff17be086477 ("fuse: writepage: skip already in flight")
Cc:  # v3.13
Signed-off-by: Miklos Szeredi

fuse: simplify request allocation

2019-09-10T14:29:50+00:00

Page arrays are not allocated together with the request anymore.  Get rid
of the dead code

Signed-off-by: Miklos Szeredi

fuse: convert release to simple api

2019-09-10T14:29:50+00:00

Since we cannot reserve the request structure up-front, make sure that the
request allocation doesn't fail using __GFP_NOFAIL.

Signed-off-by: Miklos Szeredi

fuse: convert writepages to simple api

2019-09-10T14:29:49+00:00

Derive fuse_writepage_args from fuse_io_args.

Sending the request is tricky since it was done with fi->lock held, hence
we must either use atomic allocation or release the lock.  Both are
possible so try atomic first and if it fails, release the lock and do the
regular allocation with GFP_NOFS and __GFP_NOFAIL.  Both flags are
necessary for correct operation.

Move the page realloc function from dev.c to file.c and convert to using
fuse_writepage_args.

The last caller of fuse_write_fill() is gone, so get rid of it.

Signed-off-by: Miklos Szeredi

fuse: convert readdir to simple api

2019-09-10T14:29:49+00:00

The old fuse_read_fill() helper can be deleted, now that the last user is
gone.

The fuse_io_args struct is moved to fuse_i.h so it can be shared between
readdir/read code.

Signed-off-by: Miklos Szeredi

fuse: convert readpages to simple api

2019-09-10T14:29:49+00:00

Need to extend fuse_io_args with 'attr_ver' and 'ff' members, that take the
functionality of the same named members in fuse_req.

fuse_short_read() can now take struct fuse_args_pages.

Signed-off-by: Miklos Szeredi

fuse: convert direct_io to simple api

2019-09-10T14:29:49+00:00

Change of semantics in fuse_async_req_send/fuse_send_(read|write): these
can now return error, in which case the 'end' callback isn't called, so the
fuse_io_args object needs to be freed.

Added verification that the return value is sane (less than or equal to the
requested read/write size).

Signed-off-by: Miklos Szeredi