linux-stable.git/fs/fuse/file.c, branch linux-3.9.y

more file_inode() open-coded instances

2013-02-27T21:59:05+00:00

Signed-off-by: Al Viro

fuse: send poll events

2013-02-04T15:14:32+00:00

commit 626cf23660 "poll: add poll_requested_events()..." enabled us to send the
requested events to the filesystem.

Signed-off-by: Miklos Szeredi

Do not use RCU for current process credentials

2013-01-31T16:08:10+00:00

Commit c69e8d9c0 added rcu lock to fuse/dir.c It was assuming
that 'task' is some other process but in fact this parameter always
equals to 'current'. Inline this parameter to make it more readable
and remove RCU lock as it is not needed when access current process
credentials.

Signed-off-by: Anatol Pomozov 
Signed-off-by: Miklos Szeredi

fuse: cleanup fuse_direct_io()

2013-01-24T15:21:28+00:00

Fix the following sparse warnings:

fs/fuse/file.c:1216:43: warning: cast removes address space of expression
fs/fuse/file.c:1216:43: warning: incorrect type in initializer (different address spaces)
fs/fuse/file.c:1216:43:    expected void [noderef] *iov_base
fs/fuse/file.c:1216:43:    got void *
fs/fuse/file.c:1241:43: warning: cast removes address space of expression
fs/fuse/file.c:1241:43: warning: incorrect type in initializer (different address spaces)
fs/fuse/file.c:1241:43:    expected void [noderef] *iov_base
fs/fuse/file.c:1241:43:    got void *
fs/fuse/file.c:1267:43: warning: cast removes address space of expression
fs/fuse/file.c:1267:43: warning: incorrect type in initializer (different address spaces)
fs/fuse/file.c:1267:43:    expected void [noderef] *iov_base
fs/fuse/file.c:1267:43:    got void *

Signed-off-by: Miklos Szeredi

fuse: optimize __fuse_direct_io()

2013-01-24T15:21:28+00:00

__fuse_direct_io() allocates fuse-requests by calling fuse_get_req(fc, n). The
patch calculates 'n' based on iov[] array. This is useful because allocating
FUSE_MAX_PAGES_PER_REQ page pointers and descriptors for each fuse request
would be waste of memory in case of iov-s of smaller size.

Signed-off-by: Maxim Patlasov 
Signed-off-by: Miklos Szeredi

fuse: optimize fuse_get_user_pages()

2013-01-24T15:21:27+00:00

Let fuse_get_user_pages() pack as many iov-s to a single fuse_req as
possible. This is very beneficial in case of iov[] consisting of many
iov-s of relatively small sizes (e.g. PAGE_SIZE).

Signed-off-by: Maxim Patlasov 
Signed-off-by: Miklos Szeredi

fuse: pass iov[] to fuse_get_user_pages()

2013-01-24T15:21:27+00:00

The patch makes preliminary work for the next patch optimizing scatter-gather
direct IO. The idea is to allow fuse_get_user_pages() to pack as many iov-s
to each fuse request as possible. So, here we only rework all related
call-paths to carry iov[] from fuse_direct_IO() to fuse_get_user_pages().

Signed-off-by: Maxim Patlasov 
Signed-off-by: Miklos Szeredi

fuse: use req->page_descs[] for argpages cases

2013-01-24T15:21:27+00:00

Previously, anyone who set flag 'argpages' only filled req->pages[] and set
per-request page_offset. This patch re-works all cases where argpages=1 to
fill req->page_descs[] properly.

Having req->page_descs[] filled properly allows to re-work fuse_copy_pages()
to copy page fragments described by req->page_descs[]. This will be useful
for next patches optimizing direct_IO.

Signed-off-by: Maxim Patlasov 
Signed-off-by: Miklos Szeredi

fuse: add per-page descriptor to fuse_req

2013-01-24T15:21:27+00:00

The ability to save page pointers along with lengths and offsets in fuse_req
will be useful to cover several iovec-s with a single fuse_req.

Per-request page_offset is removed because anybody who need it can use
req->page_descs[0].offset instead.

Signed-off-by: Maxim Patlasov 
Signed-off-by: Miklos Szeredi

fuse: rework fuse_do_ioctl()

2013-01-24T15:21:26+00:00

fuse_do_ioctl() already calculates the number of pages it's going to use. It is
stored in 'num_pages' variable. So the patch simply uses it for allocating
fuse_req.

Signed-off-by: Maxim Patlasov 
Signed-off-by: Miklos Szeredi