Messages in this thread | | | From | Tejun Heo <> | Subject | [PATCHSET] CUSE: implement CUSE, take #3 | Date | Tue, 14 Apr 2009 10:54:48 +0900 |
| |
Hello, Miklos.
This is the third take of implement-CUSE patchset. Sorry about the huge delay. :-)
Changes from the last take[L] are...
* Rather large FUSE update to make inode, superblock and mnt optional.
* CUSE no longer creates its superblock or mount. It simply sets cdev file->private_data to fuse_file and operates on it.
* cdev lifetime handling fixed. CUSE cdev now atomically looks up matching device (connection) like other cdevs do.
* CUSE init protocal updated. An additional request CUSE_INIT_DONE is sent after successful creation of devices. This is to allow userland server to synchronize init completion.
This patchset contains the following six patches.
0001-FUSE-misc-cleanups.patch 0002-FUSE-use-fuse-objects-as-the-main-objects-in-file-h.patch 0003-FUSE-make-ff-fi-optional.patch 0004-FUSE-update-fuse_conn_init-and-separate-out-fuse_.patch 0005-FUSE-export-symbols-to-be-used-by-CUSE.patch 0006-CUSE-implement-CUSE-Character-device-in-Userspace.patch
0001 is misc preparation. 0002 updates fuse file handling operations such that it primarily operations on fuse_file instead of vfs objects. This patch is rather huge but I couldn't think of a good meaningful way to chop it down further. As scary as it looks, it should have zero functional difference and most changes are mechanical.
0003 makes fuse_file->fi (added by 0002) optional so that fuse_file can be used separately.
0004-0005 prepares for CUSE implementation and 0006 does it.
I didn't replace the kthread init helper with req->end() callback for two reasons. Firstly, init involves issuing two commands - FUSE_INIT and CUSE_INIT. Chaning init sequence via req->end() would require another split in the init sequence. Secondly, the second command would have to be issued from ->end(), which is just hairy. I think doing the latter part of initialization in kthread is better here.
This patchset is on top of the current linus#master[1] and available in the following git tree.
git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git cuse
diffstat follows.
fs/Kconfig | 10 fs/fuse/Makefile | 1 fs/fuse/cuse.c | 675 ++++++++++++++++++++++++++++++++++++++++++++++++++ fs/fuse/dev.c | 9 fs/fuse/dir.c | 97 ++++--- fs/fuse/file.c | 613 +++++++++++++++++++++++---------------------- fs/fuse/fuse_i.h | 100 ++++++- fs/fuse/inode.c | 54 ++-- include/linux/cuse.h | 49 +++ include/linux/fuse.h | 2 include/linux/magic.h | 5 11 files changed, 1237 insertions(+), 378 deletions(-)
Thanks.
-- tejun
[L] http://thread.gmane.org/gmane.linux.kernel/759831 [1] 80a04d3f2f94fb68b5df05e3ac6697130bc3467a
| |