Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-06 14:05:39 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

netfs: Allow the netfs to make the io (sub)request alloc larger

Browse Source 
Allow the network filesystem to specify extra space to be allocated on the
end of the io (sub)request.  This allows cifs, for example, to use this
space rather than allocating its own cifs_readdata struct.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: linux-cachefs@redhat.com
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
This commit is contained in:
David Howells 2022-03-09 11:01:12 +00:00
parent 87b57a0489
commit cc3cb0a18d
2 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
fs/netfs/objects.c
View File

@ -22,7 +22,8 @@ struct netfs_io_request *netfs_alloc_request(struct address_space *mapping,
struct netfs_io_request *rreq;
int ret;
rreq = kzalloc(sizeof(struct netfs_io_request), GFP_KERNEL);
rreq = kzalloc(ctx->ops->io_request_size ?: sizeof(struct netfs_io_request),
GFP_KERNEL);
if (!rreq)
return ERR_PTR(-ENOMEM);
@ -114,7 +115,9 @@ struct netfs_io_subrequest *netfs_alloc_subrequest(struct netfs_io_request *rreq
{
struct netfs_io_subrequest *subreq;
subreq = kzalloc(sizeof(struct netfs_io_subrequest), GFP_KERNEL);
subreq = kzalloc(rreq->netfs_ops->io_subrequest_size ?:
sizeof(struct netfs_io_subrequest),
GFP_KERNEL);
if (subreq) {
INIT_LIST_HEAD(&subreq->rreq_link);
refcount_set(&subreq->ref, 2);

2
include/linux/netfs.h
View File

@ -210,6 +210,8 @@ struct netfs_io_request {
* Operations the network filesystem can/must provide to the helpers.
*/
struct netfs_request_ops {
unsigned int io_request_size; /* Alloc size for netfs_io_request struct */
unsigned int io_subrequest_size; /* Alloc size for netfs_io_subrequest struct */
int (*init_request)(struct netfs_io_request *rreq, struct file *file);
void (*free_request)(struct netfs_io_request *rreq);