linux-stable.git/include/linux/fuse.h, branch linux-2.6.30.y

fuse: update interface version

2008-12-01T18:14:02+00:00

Change interface version to 7.11 after adding the IOCTL and POLL
messages.

Also clean up the  header a bit:
  - update copyright date to 2008
  - fix checkpatch warning:
      WARNING: Use #include  instead of 
  - remove FUSE_MAJOR define, which is not being used any more

Signed-off-by: Miklos Szeredi

fuse: implement poll support

2008-11-26T11:03:55+00:00

Implement poll support.  Polled files are indexed using kh in a RB
tree rooted at fuse_conn->polled_files.

Client should send FUSE_NOTIFY_POLL notification once after processing
FUSE_POLL which has FUSE_POLL_SCHEDULE_NOTIFY set.  Sending
notification unconditionally after the latest poll or everytime file
content might have changed is inefficient but won't cause malfunction.

fuse_file_poll() can sleep and requires patches from the following
thread which allows f_op->poll() to sleep.

  http://thread.gmane.org/gmane.linux.kernel/726176

Signed-off-by: Tejun Heo 
Signed-off-by: Miklos Szeredi

fuse: implement unsolicited notification

2008-11-26T11:03:55+00:00

Clients always used to write only in response to read requests.  To
implement poll efficiently, clients should be able to issue
unsolicited notifications.  This patch implements basic notification
support.

Zero fuse_out_header.unique is now accepted and considered unsolicited
notification and the error field contains notification code.  This
patch doesn't implement any actual notification.

Signed-off-by: Tejun Heo 
Signed-off-by: Miklos Szeredi

fuse: implement ioctl support

2008-11-26T11:03:55+00:00

Generic ioctl support is tricky to implement because only the ioctl
implementation itself knows which memory regions need to be read
and/or written.  To support this, fuse client can request retry of
ioctl specifying memory regions to read and write.  Deep copying
(nested pointers) can be implemented by retrying multiple times
resolving one depth of dereference at a time.

For security and cleanliness considerations, ioctl implementation has
restricted mode where the kernel determines data transfer directions
and sizes using the _IOC_*() macros on the ioctl command.  In this
mode, retry is not allowed.

For all FUSE servers, restricted mode is enforced.  Unrestricted ioctl
will be used by CUSE.

Plese read the comment on top of fs/fuse/file.c::fuse_file_do_ioctl()
for more information.

Signed-off-by: Tejun Heo 
Signed-off-by: Miklos Szeredi

fuse: move FUSE_MINOR to miscdevice.h

2008-11-26T11:03:54+00:00

Move FUSE_MINOR to miscdevice.h.  While at it, de-uglify the file.

Signed-off-by: Tejun Heo 
Signed-off-by: Miklos Szeredi

fuse: implement nonseekable open

2008-10-16T14:08:57+00:00

Let the client request nonseekable open using FOPEN_NONSEEKABLE and
call nonseekable_open() on the file if requested.

Signed-off-by: Tejun Heo 
Signed-off-by: Miklos Szeredi

fuse: add include protectors

2008-10-16T14:08:57+00:00

Add include protectors to include/linux/fuse.h and fs/fuse/fuse_i.h.

Signed-off-by: Tejun Heo 
Signed-off-by: Miklos Szeredi

fuse: nfs export special lookups

2008-07-25T17:53:48+00:00

Implement the get_parent export operation by sending a LOOKUP request with
".." as the name.

Implement looking up an inode by node ID after it has been evicted from
the cache.  This is done by seding a LOOKUP request with "." as the name
(for all file types, not just directories).

The filesystem can set the FUSE_EXPORT_SUPPORT flag in the INIT reply, to
indicate that it supports these special lookups.

Thanks to John Muir for the original implementation of this feature.

Signed-off-by: Miklos Szeredi 
Cc: "J. Bruce Fields" 
Cc: Trond Myklebust 
Cc: Matthew Wilcox 
Cc: David Teigland 
Cc: Christoph Hellwig 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fuse: add flag to turn on big writes

2008-05-13T15:02:26+00:00

Prior to 2.6.26 fuse only supported single page write requests.  In theory all
fuse filesystem should be able support bigger than 4k writes, as there's
nothing in the API to prevent it.  Unfortunately there's a known case in
NTFS-3G where big writes cause filesystem corruption.  There could also be
other filesystems, where the lack of testing with big write requests would
result in bugs.

To prevent such problems on a kernel upgrade, disable big writes by default,
but let filesystems set a flag to turn it on.

Signed-off-by: Miklos Szeredi 
Cc: Szabolcs Szakacsits 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fuse: pass open flags to read and write

2007-11-29T17:24:54+00:00

Some open flags (O_APPEND, O_DIRECT) can be changed with fcntl(F_SETFL, ...)
after open, but fuse currently only sends the flags to userspace in open.

To make it possible to correcly handle changing flags, send the
current value to userspace in each read and write.

Signed-off-by: Miklos Szeredi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds