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| author | Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com> | 2011-02-16 18:43:20 -0800 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@gmail.com> | 2011-03-15 09:57:35 -0500 |
| commit | 2c66523fd290edeea26cbe8cedd0af167d0f7e5f (patch) | |
| tree | e2658302dfce599cd42545d0487a5650a187c7bd /net | |
| parent | 1fc52481c2b886c445bb167dfd16ee6de6922ef7 (diff) | |
| download | linux-2c66523fd290edeea26cbe8cedd0af167d0f7e5f.tar.gz linux-2c66523fd290edeea26cbe8cedd0af167d0f7e5f.tar.bz2 linux-2c66523fd290edeea26cbe8cedd0af167d0f7e5f.zip | |
[net/9p] readdir zerocopy changes for 9P2000.L protocol.
Modify p9_client_readdir() to check the transport preference and act according
If the preference is P9_TRANS_PREF_PAYLOAD_SEP, send the payload
separately instead of putting it directly on PDU.
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/9p/client.c | 11 | ||||
| -rw-r--r-- | net/9p/protocol.c | 18 |
2 files changed, 27 insertions, 2 deletions
diff --git a/net/9p/client.c b/net/9p/client.c index 412c52e1de74..6e07ef494ff2 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -1735,7 +1735,14 @@ int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) if (count < rsize) rsize = count; - req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, offset, rsize); + if ((clnt->trans_mod->pref & P9_TRANS_PREF_PAYLOAD_MASK) == + P9_TRANS_PREF_PAYLOAD_SEP) { + req = p9_client_rpc(clnt, P9_TREADDIR, "dqF", fid->fid, + offset, rsize, data); + } else { + req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, + offset, rsize); + } if (IS_ERR(req)) { err = PTR_ERR(req); goto error; @@ -1749,7 +1756,7 @@ int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); - if (data) + if (!req->tc->pbuf_size && data) memmove(data, dataptr, count); p9_free_req(clnt, req); diff --git a/net/9p/protocol.c b/net/9p/protocol.c index 7bca2421bfc8..2ce515b859b3 100644 --- a/net/9p/protocol.c +++ b/net/9p/protocol.c @@ -125,6 +125,15 @@ pdu_write_urw(struct p9_fcall *pdu, const char *kdata, const char __user *udata, return 0; } +static size_t +pdu_write_readdir(struct p9_fcall *pdu, const char *kdata, size_t size) +{ + BUG_ON(pdu->size > P9_READDIRHDRSZ); + pdu->pkbuf = (char *)kdata; + pdu->pbuf_size = size; + return 0; +} + /* b - int8_t w - int16_t @@ -466,6 +475,15 @@ p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt, errcode = -EFAULT; } break; + case 'F':{ + int32_t cnt = va_arg(ap, int32_t); + const char *k = va_arg(ap, const void *); + errcode = p9pdu_writef(pdu, proto_version, "d", + cnt); + if (!errcode && pdu_write_readdir(pdu, k, cnt)) + errcode = -EFAULT; + } + break; case 'U':{ int32_t count = va_arg(ap, int32_t); const char __user *udata = |