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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2011-08-16 10:50:10 +0530
committerEric Van Hensbergen <ericvh@gmail.com>2011-10-24 11:13:11 -0500
commitabfa034e4b8ed0046fa589769e9840af645bc4ba (patch)
tree146195e891a2fd63e3fc91f803547abb904b2087 /include/net/9p
parentc3b92c8787367a8bb53d57d9789b558f1295cc96 (diff)
fs/9p: Update zero-copy implementation in 9p
* remove lot of update to different data structure * add a seperate callback for zero copy request. * above makes non zero copy code path simpler * remove conditionalizing TREAD/TREADDIR/TWRITE in the zero copy path * Fix the dotu p9_check_errors with zero copy. Add sufficient doc around * Add support for both in and output buffers in zero copy callback * pin and unpin pages in the same context * use helpers instead of defining page offset and rest of page ourself * Fix mem leak in p9_check_errors * Remove 'E' and 'F' in p9pdu_vwritef Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'include/net/9p')
-rw-r--r--include/net/9p/9p.h11
-rw-r--r--include/net/9p/transport.h10
2 files changed, 5 insertions, 16 deletions
diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h
index a6326ef8ade6..d83a01300871 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -359,6 +359,9 @@ enum p9_qid_t {
/* Room for readdir header */
#define P9_READDIRHDRSZ 24
+/* size of header for zero copy read/write */
+#define P9_ZC_HDR_SZ 4096
+
/**
* struct p9_qid - file system entity information
* @type: 8-bit type &p9_qid_t
@@ -555,10 +558,6 @@ struct p9_rstatfs {
* @tag: transaction id of the request
* @offset: used by marshalling routines to track current position in buffer
* @capacity: used by marshalling routines to track total malloc'd capacity
- * @pubuf: Payload user buffer given by the caller
- * @pkbuf: Payload kernel buffer given by the caller
- * @pbuf_size: pubuf/pkbuf(only one will be !NULL) size to be read/write.
- * @private: For transport layer's use.
* @sdata: payload
*
* &p9_fcall represents the structure for all 9P RPC
@@ -575,10 +574,6 @@ struct p9_fcall {
size_t offset;
size_t capacity;
- char __user *pubuf;
- char *pkbuf;
- size_t pbuf_size;
- void *private;
u8 *sdata;
};
diff --git a/include/net/9p/transport.h b/include/net/9p/transport.h
index 83531ebeee99..adcbb20f6511 100644
--- a/include/net/9p/transport.h
+++ b/include/net/9p/transport.h
@@ -26,13 +26,6 @@
#ifndef NET_9P_TRANSPORT_H
#define NET_9P_TRANSPORT_H
-#define P9_TRANS_PREF_PAYLOAD_MASK 0x1
-
-/* Default. Add Payload to PDU before sending it down to transport layer */
-#define P9_TRANS_PREF_PAYLOAD_DEF 0x0
-/* Send pay load separately to transport layer along with PDU.*/
-#define P9_TRANS_PREF_PAYLOAD_SEP 0x1
-
/**
* struct p9_trans_module - transport module interface
* @list: used to maintain a list of currently available transports
@@ -56,13 +49,14 @@ struct p9_trans_module {
struct list_head list;
char *name; /* name of transport */
int maxsize; /* max message size of transport */
- int pref; /* Preferences of this transport */
int def; /* this transport should be default */
struct module *owner;
int (*create)(struct p9_client *, const char *, char *);
void (*close) (struct p9_client *);
int (*request) (struct p9_client *, struct p9_req_t *req);
int (*cancel) (struct p9_client *, struct p9_req_t *req);
+ int (*zc_request)(struct p9_client *, struct p9_req_t *,
+ char *, char *, int , int, int, int);
};
void v9fs_register_trans(struct p9_trans_module *m);