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Message-ID: <20241025204008.4076565-22-dhowells@redhat.com>
Date: Fri, 25 Oct 2024 21:39:48 +0100
From: David Howells <dhowells@...hat.com>
To: Christian Brauner <christian@...uner.io>,
Steve French <smfrench@...il.com>,
Matthew Wilcox <willy@...radead.org>
Cc: David Howells <dhowells@...hat.com>,
Jeff Layton <jlayton@...nel.org>,
Gao Xiang <hsiangkao@...ux.alibaba.com>,
Dominique Martinet <asmadeus@...ewreck.org>,
Marc Dionne <marc.dionne@...istor.com>,
Paulo Alcantara <pc@...guebit.com>,
Shyam Prasad N <sprasad@...rosoft.com>,
Tom Talpey <tom@...pey.com>,
Eric Van Hensbergen <ericvh@...nel.org>,
Ilya Dryomov <idryomov@...il.com>,
netfs@...ts.linux.dev,
linux-afs@...ts.infradead.org,
linux-cifs@...r.kernel.org,
linux-nfs@...r.kernel.org,
ceph-devel@...r.kernel.org,
v9fs@...ts.linux.dev,
linux-erofs@...ts.ozlabs.org,
linux-fsdevel@...r.kernel.org,
linux-mm@...ck.org,
netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v2 21/31] afs: Make afs_init_request() get a key if not given a file
In a future patch, AFS directory caching will go through netfslib and this
will involve, at times, running on behalf of ->lookup(), which doesn't
provide us with a file from which we can get an authentication key.
If a file isn't provided, make afs_init_request() get a key from the
process's keyrings instead when setting up a read.
Signed-off-by: David Howells <dhowells@...hat.com>
cc: Marc Dionne <marc.dionne@...istor.com>
cc: linux-afs@...ts.infradead.org
---
fs/afs/file.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/fs/afs/file.c b/fs/afs/file.c
index f717168da4ab..a9d98d18407c 100644
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -372,10 +372,26 @@ static int afs_symlink_read_folio(struct file *file, struct folio *folio)
static int afs_init_request(struct netfs_io_request *rreq, struct file *file)
{
+ struct afs_vnode *vnode = AFS_FS_I(rreq->inode);
+
if (file)
rreq->netfs_priv = key_get(afs_file_key(file));
rreq->rsize = 256 * 1024;
rreq->wsize = 256 * 1024 * 1024;
+
+ switch (rreq->origin) {
+ case NETFS_READ_SINGLE:
+ if (!file) {
+ struct key *key = afs_request_key(vnode->volume->cell);
+
+ if (IS_ERR(key))
+ return PTR_ERR(key);
+ rreq->netfs_priv = key;
+ }
+ break;
+ default:
+ break;
+ }
return 0;
}
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