[Qemu-devel] [PATCH v3 0/2] Fix compilation of netmap backend

[Qemu-devel] [PATCH v3 0/2] Fix compilation of netmap backend

[Vincenzo Maffione]

This patch series adds some fixes to the netmap net backend. It contains
two changes:
    (1) Fix compilation issue of netmap.c introduced by the reorganization
        of struct NetClientOptions
    (2) Address the FIXME comment that was asking to use error_setg()
        variants in place of error_report()

CHANGELOG:
    - removed dead return and use error_setg_file_open() in place
      of error_setg_errno()
    - I noticed that net_init_netmap() has to return int, so I restored
      the return statements in that function

Vincenzo Maffione (2):
  net: netmap: Fix compilation issue
  net: netmap: use error_setg() helpers in place of error_report()

 net/netmap.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

-- 
2.6.2

[Qemu-devel] [PATCH v3 1/2] net: netmap: Fix compilation issue

[Vincenzo Maffione]

Reorganization of struct NetClientOptions (commit e4ba22b) caused a
compilation failure of the netmap backend. This patch fixes the issue
by properly accessing the union field.

Signed-off-by: Vincenzo Maffione <v.maffione@gmail.com>
---
 net/netmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netmap.c b/net/netmap.c
index 508b829..4197a9c 100644
--- a/net/netmap.c
+++ b/net/netmap.c
@@ -439,7 +439,7 @@ int net_init_netmap(const NetClientOptions *opts,
                     const char *name, NetClientState *peer, Error **errp)
 {
     /* FIXME error_setg(errp, ...) on failure */
-    const NetdevNetmapOptions *netmap_opts = opts->netmap;
+    const NetdevNetmapOptions *netmap_opts = opts->u.netmap;
     NetClientState *nc;
     NetmapPriv me;
     NetmapState *s;
-- 
2.6.2

[Qemu-devel] [PATCH v3 2/2] net: netmap: use error_setg() helpers in place of error_report()

[Vincenzo Maffione]

This update was required to align error reporting of netmap backend
initialization to the modifications introduced by commit a30ecde.

Signed-off-by: Vincenzo Maffione <v.maffione@gmail.com>
---
 net/netmap.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/net/netmap.c b/net/netmap.c
index 4197a9c..5558368 100644
--- a/net/netmap.c
+++ b/net/netmap.c
@@ -90,7 +90,7 @@ pkt_copy(const void *_src, void *_dst, int l)
  * Open a netmap device. We assume there is only one queue
  * (which is the case for the VALE bridge).
  */
-static int netmap_open(NetmapPriv *me)
+static void netmap_open(NetmapPriv *me, Error **errp)
 {
     int fd;
     int err;
@@ -99,9 +99,8 @@ static int netmap_open(NetmapPriv *me)
 
     me->fd = fd = open(me->fdname, O_RDWR);
     if (fd < 0) {
-        error_report("Unable to open netmap device '%s' (%s)",
-                        me->fdname, strerror(errno));
-        return -1;
+        error_setg_file_open(errp, errno, me->fdname);
+        return;
     }
     memset(&req, 0, sizeof(req));
     pstrcpy(req.nr_name, sizeof(req.nr_name), me->ifname);
@@ -109,15 +108,14 @@ static int netmap_open(NetmapPriv *me)
     req.nr_version = NETMAP_API;
     err = ioctl(fd, NIOCREGIF, &req);
     if (err) {
-        error_report("Unable to register %s: %s", me->ifname, strerror(errno));
+        error_setg_errno(errp, errno, "Unable to register %s", me->ifname);
         goto error;
     }
     l = me->memsize = req.nr_memsize;
 
     me->mem = mmap(0, l, PROT_WRITE | PROT_READ, MAP_SHARED, fd, 0);
     if (me->mem == MAP_FAILED) {
-        error_report("Unable to mmap netmap shared memory: %s",
-                        strerror(errno));
+        error_setg_errno(errp, errno, "Unable to mmap netmap shared memory");
         me->mem = NULL;
         goto error;
     }
@@ -125,11 +123,11 @@ static int netmap_open(NetmapPriv *me)
     me->nifp = NETMAP_IF(me->mem, req.nr_offset);
     me->tx = NETMAP_TXRING(me->nifp, 0);
     me->rx = NETMAP_RXRING(me->nifp, 0);
-    return 0;
+
+    return;
 
 error:
     close(me->fd);
-    return -1;
 }
 
 static void netmap_send(void *opaque);
@@ -438,9 +436,9 @@ static NetClientInfo net_netmap_info = {
 int net_init_netmap(const NetClientOptions *opts,
                     const char *name, NetClientState *peer, Error **errp)
 {
-    /* FIXME error_setg(errp, ...) on failure */
     const NetdevNetmapOptions *netmap_opts = opts->u.netmap;
     NetClientState *nc;
+    Error *err = NULL;
     NetmapPriv me;
     NetmapState *s;
 
@@ -448,7 +446,9 @@ int net_init_netmap(const NetClientOptions *opts,
         netmap_opts->has_devname ? netmap_opts->devname : "/dev/netmap");
     /* Set default name for the port if not supplied. */
     pstrcpy(me.ifname, sizeof(me.ifname), netmap_opts->ifname);
-    if (netmap_open(&me)) {
+    netmap_open(&me, &err);
+    if (err) {
+        error_propagate(errp, err);
         return -1;
     }
     /* Create the object. */
-- 
2.6.2

Re: [Qemu-devel] [PATCH for-2.5 v3 0/2] Fix compilation of netmap backend

[Eric Blake]

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On 11/10/2015 02:47 AM, Vincenzo Maffione wrote:
> This patch series adds some fixes to the netmap net backend. It contains
> two changes:
>     (1) Fix compilation issue of netmap.c introduced by the reorganization
>         of struct NetClientOptions
>     (2) Address the FIXME comment that was asking to use error_setg()
>         variants in place of error_report()
> 
> CHANGELOG:
>     - removed dead return and use error_setg_file_open() in place
>       of error_setg_errno()
>     - I noticed that net_init_netmap() has to return int, so I restored
>       the return statements in that function
> 
> Vincenzo Maffione (2):
>   net: netmap: Fix compilation issue
>   net: netmap: use error_setg() helpers in place of error_report()

Series belongs in 2.5.
Reviewed-by: Eric Blake <eblake@redhat.com>

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


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Re: [Qemu-devel] [PATCH v3 0/2] Fix compilation of netmap backend

[Markus Armbruster]

Vincenzo Maffione <v.maffione@gmail.com> writes:

> This patch series adds some fixes to the netmap net backend. It contains
> two changes:
>     (1) Fix compilation issue of netmap.c introduced by the reorganization
>         of struct NetClientOptions
>     (2) Address the FIXME comment that was asking to use error_setg()
>         variants in place of error_report()

Series
Reviewed-by: Markus Armbruster <armbru@redhat.com>

Re: [Qemu-devel] [PATCH v3 0/2] Fix compilation of netmap backend

[Jason Wang]

On 11/10/2015 05:47 PM, Vincenzo Maffione wrote:
> This patch series adds some fixes to the netmap net backend. It contains
> two changes:
>     (1) Fix compilation issue of netmap.c introduced by the reorganization
>         of struct NetClientOptions
>     (2) Address the FIXME comment that was asking to use error_setg()
>         variants in place of error_report()
>
> CHANGELOG:
>     - removed dead return and use error_setg_file_open() in place
>       of error_setg_errno()
>     - I noticed that net_init_netmap() has to return int, so I restored
>       the return statements in that function
>
> Vincenzo Maffione (2):
>   net: netmap: Fix compilation issue
>   net: netmap: use error_setg() helpers in place of error_report()
>
>  net/netmap.c | 24 ++++++++++++------------
>  1 file changed, 12 insertions(+), 12 deletions(-)
>

I've picked this series in https://github.com/jasowang/qemu/commits/net

Thanks