From: Laurent Vivier <lvivier@redhat.com>
To: passt-dev@passt.top
Cc: Laurent Vivier <lvivier@redhat.com>
Subject: [PATCH 16/24] packet: replace struct desc by struct iovec
Date: Fri, 2 Feb 2024 15:11:43 +0100 [thread overview]
Message-ID: <20240202141151.3762941-17-lvivier@redhat.com> (raw)
In-Reply-To: <20240202141151.3762941-1-lvivier@redhat.com>
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
---
packet.c | 75 +++++++++++++++++++++++++++++++-------------------------
packet.h | 14 ++---------
2 files changed, 43 insertions(+), 46 deletions(-)
diff --git a/packet.c b/packet.c
index ccfc84607709..af2a539a1794 100644
--- a/packet.c
+++ b/packet.c
@@ -22,6 +22,36 @@
#include "util.h"
#include "log.h"
+static int packet_check_range(const struct pool *p, size_t offset, size_t len,
+ const char *start, const char *func, int line)
+{
+ if (start < p->buf) {
+ if (func) {
+ trace("add packet start %p before buffer start %p, "
+ "%s:%i", (void *)start, (void *)p->buf, func, line);
+ }
+ return -1;
+ }
+
+ if (start + len + offset > p->buf + p->buf_size) {
+ if (func) {
+ trace("packet offset plus length %lu from size %lu, "
+ "%s:%i", start - p->buf + len + offset,
+ p->buf_size, func, line);
+ }
+ return -1;
+ }
+
+#if UINTPTR_MAX == UINT64_MAX
+ if ((uintptr_t)start - (uintptr_t)p->buf > UINT32_MAX) {
+ trace("add packet start %p, buffer start %p, %s:%i",
+ (void *)start, (void *)p->buf, func, line);
+ return -1;
+ }
+#endif
+
+ return 0;
+}
/**
* packet_add_do() - Add data as packet descriptor to given pool
* @p: Existing pool
@@ -41,34 +71,16 @@ void packet_add_do(struct pool *p, size_t len, const char *start,
return;
}
- if (start < p->buf) {
- trace("add packet start %p before buffer start %p, %s:%i",
- (void *)start, (void *)p->buf, func, line);
+ if (packet_check_range(p, 0, len, start, func, line))
return;
- }
-
- if (start + len > p->buf + p->buf_size) {
- trace("add packet start %p, length: %zu, buffer end %p, %s:%i",
- (void *)start, len, (void *)(p->buf + p->buf_size),
- func, line);
- return;
- }
if (len > UINT16_MAX) {
trace("add packet length %zu, %s:%i", len, func, line);
return;
}
-#if UINTPTR_MAX == UINT64_MAX
- if ((uintptr_t)start - (uintptr_t)p->buf > UINT32_MAX) {
- trace("add packet start %p, buffer start %p, %s:%i",
- (void *)start, (void *)p->buf, func, line);
- return;
- }
-#endif
-
- p->pkt[idx].offset = start - p->buf;
- p->pkt[idx].len = len;
+ p->pkt[idx].iov_base = (void *)start;
+ p->pkt[idx].iov_len = len;
p->count++;
}
@@ -104,28 +116,23 @@ void *packet_get_do(const struct pool *p, size_t idx, size_t offset,
return NULL;
}
- if (p->pkt[idx].offset + len + offset > p->buf_size) {
+ if (len + offset > p->pkt[idx].iov_len) {
if (func) {
- trace("packet offset plus length %zu from size %zu, "
- "%s:%i", p->pkt[idx].offset + len + offset,
- p->buf_size, func, line);
+ trace("data length %zu, offset %zu from length %zu, "
+ "%s:%i", len, offset, p->pkt[idx].iov_len,
+ func, line);
}
return NULL;
}
- if (len + offset > p->pkt[idx].len) {
- if (func) {
- trace("data length %zu, offset %zu from length %u, "
- "%s:%i", len, offset, p->pkt[idx].len,
- func, line);
- }
+ if (packet_check_range(p, offset, len, p->pkt[idx].iov_base,
+ func, line))
return NULL;
- }
if (left)
- *left = p->pkt[idx].len - offset - len;
+ *left = p->pkt[idx].iov_len - offset - len;
- return p->buf + p->pkt[idx].offset + offset;
+ return (char *)p->pkt[idx].iov_base + offset;
}
/**
diff --git a/packet.h b/packet.h
index a784b07bbed5..8377dcf678bb 100644
--- a/packet.h
+++ b/packet.h
@@ -6,16 +6,6 @@
#ifndef PACKET_H
#define PACKET_H
-/**
- * struct desc - Generic offset-based descriptor within buffer
- * @offset: Offset of descriptor relative to buffer start, 32-bit limit
- * @len: Length of descriptor, host order, 16-bit limit
- */
-struct desc {
- uint32_t offset;
- uint16_t len;
-};
-
/**
* struct pool - Generic pool of packets stored in a buffer
* @buf: Buffer storing packet descriptors
@@ -29,7 +19,7 @@ struct pool {
size_t buf_size;
size_t size;
size_t count;
- struct desc pkt[1];
+ struct iovec pkt[1];
};
void packet_add_do(struct pool *p, size_t len, const char *start,
@@ -54,7 +44,7 @@ struct _name ## _t { \
size_t buf_size; \
size_t size; \
size_t count; \
- struct desc pkt[_size]; \
+ struct iovec pkt[_size]; \
}
#define PACKET_POOL_INIT_NOCAST(_size, _buf, _buf_size) \
--
@@ -6,16 +6,6 @@
#ifndef PACKET_H
#define PACKET_H
-/**
- * struct desc - Generic offset-based descriptor within buffer
- * @offset: Offset of descriptor relative to buffer start, 32-bit limit
- * @len: Length of descriptor, host order, 16-bit limit
- */
-struct desc {
- uint32_t offset;
- uint16_t len;
-};
-
/**
* struct pool - Generic pool of packets stored in a buffer
* @buf: Buffer storing packet descriptors
@@ -29,7 +19,7 @@ struct pool {
size_t buf_size;
size_t size;
size_t count;
- struct desc pkt[1];
+ struct iovec pkt[1];
};
void packet_add_do(struct pool *p, size_t len, const char *start,
@@ -54,7 +44,7 @@ struct _name ## _t { \
size_t buf_size; \
size_t size; \
size_t count; \
- struct desc pkt[_size]; \
+ struct iovec pkt[_size]; \
}
#define PACKET_POOL_INIT_NOCAST(_size, _buf, _buf_size) \
--
2.42.0
next prev parent reply other threads:[~2024-02-02 14:11 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-02 14:11 [PATCH 00/24] Add vhost-user support to passt Laurent Vivier
2024-02-02 14:11 ` [PATCH 01/24] iov: add some functions to manage iovec Laurent Vivier
2024-02-05 5:57 ` David Gibson
2024-02-06 14:28 ` Laurent Vivier
2024-02-07 1:01 ` David Gibson
2024-02-07 10:00 ` Laurent Vivier
2024-02-06 16:10 ` Stefano Brivio
2024-02-07 14:02 ` Laurent Vivier
2024-02-07 14:57 ` Stefano Brivio
2024-02-02 14:11 ` [PATCH 02/24] pcap: add pcap_iov() Laurent Vivier
2024-02-05 6:25 ` David Gibson
2024-02-06 16:10 ` Stefano Brivio
2024-02-02 14:11 ` [PATCH 03/24] checksum: align buffers Laurent Vivier
2024-02-05 6:02 ` David Gibson
2024-02-07 9:01 ` Stefano Brivio
2024-02-02 14:11 ` [PATCH 04/24] checksum: add csum_iov() Laurent Vivier
2024-02-05 6:07 ` David Gibson
2024-02-07 9:02 ` Stefano Brivio
2024-02-02 14:11 ` [PATCH 05/24] util: move IP stuff from util.[ch] to ip.[ch] Laurent Vivier
2024-02-05 6:13 ` David Gibson
2024-02-07 9:03 ` Stefano Brivio
2024-02-08 0:04 ` David Gibson
2024-02-02 14:11 ` [PATCH 06/24] ip: move duplicate IPv4 checksum function to ip.h Laurent Vivier
2024-02-05 6:16 ` David Gibson
2024-02-07 10:40 ` Stefano Brivio
2024-02-07 23:43 ` David Gibson
2024-02-02 14:11 ` [PATCH 07/24] ip: introduce functions to compute the header part checksum for TCP/UDP Laurent Vivier
2024-02-05 6:20 ` David Gibson
2024-02-07 10:41 ` Stefano Brivio
2024-02-02 14:11 ` [PATCH 08/24] tcp: extract buffer management from tcp_send_flag() Laurent Vivier
2024-02-06 0:24 ` David Gibson
2024-02-08 16:57 ` Stefano Brivio
2024-02-02 14:11 ` [PATCH 09/24] tcp: extract buffer management from tcp_conn_tap_mss() Laurent Vivier
2024-02-06 0:47 ` David Gibson
2024-02-08 16:59 ` Stefano Brivio
2024-02-02 14:11 ` [PATCH 10/24] tcp: rename functions that manage buffers Laurent Vivier
2024-02-06 1:48 ` David Gibson
2024-02-08 17:10 ` Stefano Brivio
2024-02-02 14:11 ` [PATCH 11/24] tcp: move buffers management functions to their own file Laurent Vivier
2024-02-02 14:11 ` [PATCH 12/24] tap: make tap_update_mac() generic Laurent Vivier
2024-02-06 1:49 ` David Gibson
2024-02-08 17:10 ` Stefano Brivio
2024-02-09 5:02 ` David Gibson
2024-02-02 14:11 ` [PATCH 13/24] tap: export pool_flush()/tapX_handler()/packet_add() Laurent Vivier
2024-02-02 14:29 ` Laurent Vivier
2024-02-06 1:52 ` David Gibson
2024-02-11 23:15 ` Stefano Brivio
2024-02-12 2:22 ` David Gibson
2024-02-02 14:11 ` [PATCH 14/24] udp: move udpX_l2_buf_t and udpX_l2_mh_sock out of udp_update_hdrX() Laurent Vivier
2024-02-06 1:59 ` David Gibson
2024-02-11 23:16 ` Stefano Brivio
2024-02-02 14:11 ` [PATCH 15/24] udp: rename udp_sock_handler() to udp_buf_sock_handler() Laurent Vivier
2024-02-06 2:14 ` David Gibson
2024-02-11 23:17 ` Stefano Brivio
2024-02-02 14:11 ` Laurent Vivier [this message]
2024-02-06 2:25 ` [PATCH 16/24] packet: replace struct desc by struct iovec David Gibson
2024-02-11 23:18 ` Stefano Brivio
2024-02-02 14:11 ` [PATCH 17/24] vhost-user: compare mode MODE_PASTA and not MODE_PASST Laurent Vivier
2024-02-06 2:29 ` David Gibson
2024-02-02 14:11 ` [PATCH 18/24] vhost-user: introduce virtio API Laurent Vivier
2024-02-06 3:51 ` David Gibson
2024-02-11 23:18 ` Stefano Brivio
2024-02-12 2:26 ` David Gibson
2024-02-02 14:11 ` [PATCH 19/24] vhost-user: introduce vhost-user API Laurent Vivier
2024-02-07 2:13 ` David Gibson
2024-02-02 14:11 ` [PATCH 20/24] vhost-user: add vhost-user Laurent Vivier
2024-02-07 2:40 ` David Gibson
2024-02-11 23:19 ` Stefano Brivio
2024-02-12 2:47 ` David Gibson
2024-02-13 15:22 ` Stefano Brivio
2024-02-14 2:05 ` David Gibson
2024-02-11 23:19 ` Stefano Brivio
2024-02-12 2:49 ` David Gibson
2024-02-12 10:02 ` Laurent Vivier
2024-02-12 16:56 ` Stefano Brivio
2024-02-02 14:11 ` [PATCH 21/24] vhost-user: use guest buffer directly in vu_handle_tx() Laurent Vivier
2024-02-09 4:26 ` David Gibson
2024-02-02 14:11 ` [PATCH 22/24] tcp: vhost-user RX nocopy Laurent Vivier
2024-02-09 4:57 ` David Gibson
2024-02-02 14:11 ` [PATCH 23/24] udp: " Laurent Vivier
2024-02-09 5:00 ` David Gibson
2024-02-02 14:11 ` [PATCH 24/24] vhost-user: remove tap_send_frames_vu() Laurent Vivier
2024-02-09 5:01 ` David Gibson
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