diff options
| author | David Howells <dhowells@redhat.com> | 2020-02-06 14:22:28 +0000 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2021-04-23 10:17:26 +0100 |
| commit | f105da1a798f23f386ac5c4c2d776d57088bec32 (patch) | |
| tree | 6cf6f13dfafcadffda00a6e4f52da5b4037311b8 /fs/afs/internal.h | |
| parent | c69bf479baa614f5e80a1ded355e752e15a52b72 (diff) | |
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 <dhowells@redhat.com>
Tested-By: Marc Dionne <marc.dionne@auristor.com>
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
Diffstat (limited to 'fs/afs/internal.h')
| -rw-r--r-- | fs/afs/internal.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/afs/internal.h b/fs/afs/internal.h index 995fef267be7..7b8306d8e81e 100644 --- a/fs/afs/internal.h +++ b/fs/afs/internal.h @@ -104,6 +104,7 @@ struct afs_call { struct afs_server *server; /* The fileserver record if fs op (pins ref) */ struct afs_vlserver *vlserver; /* The vlserver record if vl op */ void *request; /* request data (first part) */ + size_t iov_len; /* Size of *iter to be used */ struct iov_iter def_iter; /* Default buffer/data iterator */ struct iov_iter *iter; /* Iterator currently in use */ union { /* Convenience for ->def_iter */ @@ -1271,6 +1272,7 @@ static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *c static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) { + call->iov_len = size; call->kvec[0].iov_base = buf; call->kvec[0].iov_len = size; iov_iter_kvec(&call->def_iter, READ, call->kvec, 1, size); @@ -1278,21 +1280,25 @@ static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t si static inline void afs_extract_to_tmp(struct afs_call *call) { + call->iov_len = sizeof(call->tmp); afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); } static inline void afs_extract_to_tmp64(struct afs_call *call) { + call->iov_len = sizeof(call->tmp64); afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); } static inline void afs_extract_discard(struct afs_call *call, size_t size) { + call->iov_len = size; iov_iter_discard(&call->def_iter, READ, size); } static inline void afs_extract_to_buf(struct afs_call *call, size_t size) { + call->iov_len = size; afs_extract_begin(call, call->buffer, size); } |