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fuse: add FUSE_AUTO_INVAL_DATA init flag

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FUSE_AUTO_INVAL_DATA is provided to enable updated/auto cache
invalidation logic.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
This commit is contained in:
Brian Foster 2012-07-16 15:23:48 -04:00 committed by Miklos Szeredi
parent 84a1caf145
commit 72d0d248ca
3 changed files with 12 additions and 2 deletions
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3
fs/fuse/fuse_i.h
View File

@ -484,6 +484,9 @@ struct fuse_conn {
/** Is fallocate not implemented by fs? */
unsigned no_fallocate:1;
/** Use enhanced/automatic page cache invalidation. */
unsigned auto_inval_data:1;
/** The number of requests waiting for completion */
atomic_t num_waiting;

4
fs/fuse/inode.c
View File

@ -834,6 +834,8 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
fc->big_writes = 1;
if (arg->flags & FUSE_DONT_MASK)
fc->dont_mask = 1;
if (arg->flags & FUSE_AUTO_INVAL_DATA)
fc->auto_inval_data = 1;
} else {
ra_pages = fc->max_read / PAGE_CACHE_SIZE;
fc->no_lock = 1;
@ -859,7 +861,7 @@ static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req)
arg->max_readahead = fc->bdi.ra_pages * PAGE_CACHE_SIZE;
arg->flags |= FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_ATOMIC_O_TRUNC |
FUSE_EXPORT_SUPPORT | FUSE_BIG_WRITES | FUSE_DONT_MASK |
FUSE_FLOCK_LOCKS;
FUSE_FLOCK_LOCKS | FUSE_AUTO_INVAL_DATA;
req->in.h.opcode = FUSE_INIT;
req->in.numargs = 1;
req->in.args[0].size = sizeof(*arg);

7
include/linux/fuse.h
View File

@ -57,6 +57,9 @@
*
* 7.19
* - add FUSE_FALLOCATE
*
* 7.20
* - add FUSE_AUTO_INVAL_DATA
*/
#ifndef _LINUX_FUSE_H
@ -88,7 +91,7 @@
#define FUSE_KERNEL_VERSION 7
/** Minor version number of this interface */
#define FUSE_KERNEL_MINOR_VERSION 19
#define FUSE_KERNEL_MINOR_VERSION 20
/** The node ID of the root inode */
#define FUSE_ROOT_ID 1
@ -167,6 +170,7 @@ struct fuse_file_lock {
* FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
* FUSE_DONT_MASK: don't apply umask to file mode on create operations
* FUSE_FLOCK_LOCKS: remote locking for BSD style file locks
* FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages
*/
#define FUSE_ASYNC_READ (1 << 0)
#define FUSE_POSIX_LOCKS (1 << 1)
@ -176,6 +180,7 @@ struct fuse_file_lock {
#define FUSE_BIG_WRITES (1 << 5)
#define FUSE_DONT_MASK (1 << 6)
#define FUSE_FLOCK_LOCKS (1 << 10)
#define FUSE_AUTO_INVAL_DATA (1 << 12)
/**
* CUSE INIT request/reply flags