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authorMaxim Patlasov <mpatlasov@parallels.com>2012-10-26 19:48:30 +0400
committerMiklos Szeredi <mszeredi@suse.cz>2013-01-24 16:21:25 +0100
commitb111c8c0e3e5e780ae0758fc4c1c376a7c9d5997 (patch)
treecf9485ea3195b9945dc0064906d28ccb8032aa0f /fs/fuse/fuse_i.h
parent4250c0668ea10a19f3d37b1733f54ce6c8a37234 (diff)
fuse: categorize fuse_get_req()
The patch categorizes all fuse_get_req() invocations into two categories: - fuse_get_req_nopages(fc) - when caller doesn't care about req->pages - fuse_get_req(fc, n) - when caller need n page pointers (n > 0) Adding fuse_get_req_nopages() helps to avoid numerous fuse_get_req(fc, 0) scattered over code. Now it's clear from the first glance when a caller need fuse_req with page pointers. The patch doesn't make any logic changes. In multi-page case, it silly allocates array of FUSE_MAX_PAGES_PER_REQ page pointers. This will be amended by future patches. Signed-off-by: Maxim Patlasov <mpatlasov@parallels.com> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Diffstat (limited to 'fs/fuse/fuse_i.h')
-rw-r--r--fs/fuse/fuse_i.h17
1 files changed, 14 insertions, 3 deletions
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 0c5b9310f93..5b21e6ab9e7 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -683,14 +683,25 @@ struct fuse_req *fuse_request_alloc_nofs(unsigned npages);
void fuse_request_free(struct fuse_req *req);
/**
- * Get a request, may fail with -ENOMEM
+ * Get a request, may fail with -ENOMEM,
+ * caller should specify # elements in req->pages[] explicitly
*/
-struct fuse_req *fuse_get_req(struct fuse_conn *fc);
+struct fuse_req *fuse_get_req(struct fuse_conn *fc, unsigned npages);
+
+/**
+ * Get a request, may fail with -ENOMEM,
+ * useful for callers who doesn't use req->pages[]
+ */
+static inline struct fuse_req *fuse_get_req_nopages(struct fuse_conn *fc)
+{
+ return fuse_get_req(fc, 0);
+}
/**
* Gets a requests for a file operation, always succeeds
*/
-struct fuse_req *fuse_get_req_nofail(struct fuse_conn *fc, struct file *file);
+struct fuse_req *fuse_get_req_nofail_nopages(struct fuse_conn *fc,
+ struct file *file);
/**
* Decrement reference count of a request. If count goes to zero free