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| author | Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com> | 2011-01-28 14:11:13 -0800 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@gmail.com> | 2011-03-15 09:57:34 -0500 |
| commit | 022cae36551ba805bf82084047945b2901d75f36 (patch) | |
| tree | 5d8a8ff0eb2102d0449f58ddfcb8907bd3625682 /net/9p/protocol.c | |
| parent | 6752a1ebd13f69b9d5ff08914fe29ee2813cbeea (diff) | |
| download | linux-022cae36551ba805bf82084047945b2901d75f36.tar.gz linux-022cae36551ba805bf82084047945b2901d75f36.tar.bz2 linux-022cae36551ba805bf82084047945b2901d75f36.zip | |
[net/9p] Preparation and helper functions for zero copy
This patch prepares p9_fcall structure for zero copy. Added
fields send the payload buffer information to the transport layer.
In addition it adds a 'private' field for the transport layer to
store mapped/pinned page information so that it can be freed/unpinned
during req_done.
This patch also creates trans_common.[ch] to house helper functions.
It adds the following helper functions.
p9_release_req_pages - Release pages after the transaction.
p9_nr_pages - Return number of pages needed to accomodate the payload.
payload_gup - Translates user buffer into kernel pages.
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'net/9p/protocol.c')
| -rw-r--r-- | net/9p/protocol.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/9p/protocol.c b/net/9p/protocol.c index 1e308f210928..d888847db56e 100644 --- a/net/9p/protocol.c +++ b/net/9p/protocol.c @@ -606,6 +606,10 @@ void p9pdu_reset(struct p9_fcall *pdu) { pdu->offset = 0; pdu->size = 0; + pdu->private = NULL; + pdu->pubuf = NULL; + pdu->pkbuf = NULL; + pdu->pbuf_size = 0; } int p9dirent_read(char *buf, int len, struct p9_dirent *dirent, |