From f105da1a798f23f386ac5c4c2d776d57088bec32 Mon Sep 17 00:00:00 2001 From: David Howells Date: Thu, 6 Feb 2020 14:22:28 +0000 Subject: afs: Don't truncate iter during data fetch Don't truncate the iterator to correspond to the actual data size when fetching the data from the server - rather, pass the length we want to read to rxrpc. This will allow the clear-after-read code in future to simply clear the remaining iterator capacity rather than having to reinitialise the iterator. Signed-off-by: David Howells Tested-By: Marc Dionne cc: linux-afs@lists.infradead.org cc: linux-cachefs@redhat.com cc: linux-fsdevel@vger.kernel.org Link: https://lore.kernel.org/r/158861249201.340223.13035445866976590375.stgit@warthog.procyon.org.uk/ # rfc Link: https://lore.kernel.org/r/159465825061.1377938.14403904452300909320.stgit@warthog.procyon.org.uk/ Link: https://lore.kernel.org/r/160588531418.3465195.10712005940763063144.stgit@warthog.procyon.org.uk/ # rfc Link: https://lore.kernel.org/r/161118148567.1232039.13380313332292947956.stgit@warthog.procyon.org.uk/ # rfc Link: https://lore.kernel.org/r/161161044610.2537118.17908520793806837792.stgit@warthog.procyon.org.uk/ # v2 Link: https://lore.kernel.org/r/161340407907.1303470.6501394859511712746.stgit@warthog.procyon.org.uk/ # v3 Link: https://lore.kernel.org/r/161539551721.286939.14655713136572200716.stgit@warthog.procyon.org.uk/ # v4 Link: https://lore.kernel.org/r/161653807790.2770958.14034599989374173734.stgit@warthog.procyon.org.uk/ # v5 Link: https://lore.kernel.org/r/161789090823.6155.15673999934535049102.stgit@warthog.procyon.org.uk/ # v6 --- fs/afs/yfsclient.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'fs/afs/yfsclient.c') diff --git a/fs/afs/yfsclient.c b/fs/afs/yfsclient.c index bd787e71a657..6c45d32da13c 100644 --- a/fs/afs/yfsclient.c +++ b/fs/afs/yfsclient.c @@ -363,8 +363,9 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call) unsigned int size; int ret; - _enter("{%u,%zu/%llu}", - call->unmarshall, iov_iter_count(call->iter), req->actual_len); + _enter("{%u,%zu, %zu/%llu}", + call->unmarshall, call->iov_len, iov_iter_count(call->iter), + req->actual_len); switch (call->unmarshall) { case 0: @@ -396,6 +397,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call) size = PAGE_SIZE - req->offset; else size = req->remain; + call->iov_len = size; call->bvec[0].bv_len = size; call->bvec[0].bv_offset = req->offset; call->bvec[0].bv_page = req->pages[req->index]; -- cgit v1.2.3