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From: Tetsuya Mukawa <mukawa@igel.co.jp>
To: dev@dpdk.org
Cc: nakajima.yoshihiro@lab.ntt.co.jp, masutani.hitoshi@lab.ntt.co.jp
Subject: [dpdk-dev] [RFC PATCH 1/7] lib/librte_vhost: Fix host_memory_map() to handle various memory regions
Date: Thu,  6 Nov 2014 20:14:25 +0900
Message-ID: <1415272471-3299-2-git-send-email-mukawa@igel.co.jp> (raw)
In-Reply-To: <1415272471-3299-1-git-send-email-mukawa@igel.co.jp>

Without this patch, host_memory_map() can only handle a region that
exists on head of a guest physical memory. The patch fixes the
host_memory_map() to handle regions exist on middle of the physical memory.

Signed-off-by: Tetsuya Mukawa <mukawa@igel.co.jp>
---
 lib/librte_vhost/virtio-net.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/lib/librte_vhost/virtio-net.c b/lib/librte_vhost/virtio-net.c
index 8015dd8..9155a68 100644
--- a/lib/librte_vhost/virtio-net.c
+++ b/lib/librte_vhost/virtio-net.c
@@ -83,6 +83,7 @@ const uint32_t BUFSIZE = PATH_MAX;
 /* Structure containing information gathered from maps file. */
 struct procmap {
 	uint64_t	va_start;	/* Start virtual address in file. */
+	uint64_t	va_end;		/* End virtual address in file. */
 	uint64_t	len;		/* Size of file. */
 	uint64_t	pgoff;		/* Not used. */
 	uint32_t	maj;		/* Not used. */
@@ -176,7 +177,7 @@ host_memory_map(struct virtio_net *dev, struct virtio_memory *mem,
 			return -1;
 		}
 
-		procmap.len = strtoull(in[1], &end, 16);
+		procmap.va_end = strtoull(in[1], &end, 16);
 		if ((in[1] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0)) {
 			fclose(fmap);
 			return -1;
@@ -209,8 +210,8 @@ host_memory_map(struct virtio_net *dev, struct virtio_memory *mem,
 		memcpy(&procmap.prot, in[2], PROT_SZ);
 		memcpy(&procmap.fname, in[7], PATH_MAX);
 
-		if (procmap.va_start == addr) {
-			procmap.len = procmap.len - procmap.va_start;
+		if ((procmap.va_start <= addr) && (procmap.va_end >= addr)) {
+			procmap.len = procmap.va_end - procmap.va_start;
 			found = 1;
 			break;
 		}
-- 
1.9.1

  reply	other threads:[~2014-11-06 11:05 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-11-06 11:14 [dpdk-dev] [RFC PATCH 0/7] lib/librte_vhost: Add vhost-user extension Tetsuya Mukawa
2014-11-06 11:14 ` Tetsuya Mukawa [this message]
2014-11-06 11:14 ` [dpdk-dev] [RFC PATCH 2/7] lib/librte_vhost: Add an abstraction layer for vhost backends Tetsuya Mukawa
2014-11-06 11:14 ` [dpdk-dev] [RFC PATCH 3/7] lib/librte_vhost: Add an abstraction layer tointerpret messages Tetsuya Mukawa
2014-11-07 20:43   ` Xie, Huawei
2014-11-10  5:12     ` Tetsuya Mukawa
2014-11-10  8:07       ` Xie, Huawei
2014-11-10  8:44         ` Tetsuya Mukawa
2014-11-06 11:14 ` [dpdk-dev] [RFC PATCH 4/7] lib/librte_vhost: Move vhost vhost-cuse device list and accessor functions Tetsuya Mukawa
2014-11-06 11:14 ` [dpdk-dev] [RFC PATCH 5/7] lib/librte_vhost: Add a vhost session abstraction Tetsuya Mukawa
2014-11-06 11:14 ` [dpdk-dev] [RFC PATCH 6/7] lib/librte_vhost: Add vhost-cuse/user specific initialization Tetsuya Mukawa
2014-11-06 11:14 ` [dpdk-dev] [RFC PATCH 7/7] lib/librte_vhost: Add vhost-user implementation Tetsuya Mukawa
2014-11-07 21:25   ` Xie, Huawei
2014-11-10  5:11     ` Tetsuya Mukawa
2014-11-10  8:18       ` Xie, Huawei
2014-11-10  8:55         ` Tetsuya Mukawa
2014-11-14  0:07   ` Xie, Huawei
2014-11-14  4:41     ` Tetsuya Mukawa
2014-11-07  3:33 ` [dpdk-dev] [RFC PATCH 0/7] lib/librte_vhost: Add vhost-user extension Xie, Huawei
2014-11-07  5:09   ` Tetsuya Mukawa
     [not found]     ` <C37D651A908B024F974696C65296B57B0F2E3C93@SHSMSX101.ccr.corp.intel.com>
2014-11-07  6:16       ` Tetsuya Mukawa

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