* [Qemu-devel] [PULL 0/4] please pull xen-20170516-tag
@ 2017-05-16 19:19 ` Stefano Stabellini
0 siblings, 0 replies; 12+ messages in thread
From: Stefano Stabellini @ 2017-05-16 19:19 UTC (permalink / raw)
To: peter.maydell, stefanha
Cc: sstabellini, stefanha, anthony.perard, xen-devel, qemu-devel
The following changes since commit cdece0467c00007cf8e3f4b3c3f0b13bf2c4fea9:
block/win32: fix 'ret not initialized' warning (2017-05-16 15:34:18 +0100)
are available in the git repository at:
git://xenbits.xen.org/people/sstabellini/qemu-dm.git tags/xen-20170516-tag
for you to fetch changes up to 01cd90b641e1aed40cf13a577e6a737af94d55e7:
xen: call qemu_set_cloexec instead of fcntl (2017-05-16 11:51:25 -0700)
----------------------------------------------------------------
Xen 2017/05/16
----------------------------------------------------------------
Anthony PERARD (1):
configure: Remove -lxencall for Xen detection
Stefano Stabellini (3):
xen/mapcache: store dma information in revmapcache entries for debugging
xen/9pfs: fix two resource leaks on error paths, discovered by Coverity
xen: call qemu_set_cloexec instead of fcntl
configure | 2 +-
exec.c | 8 ++++----
hw/9pfs/xen-9p-backend.c | 4 +++-
hw/i386/xen/xen-mapcache.c | 15 ++++++++++-----
hw/xen/xen_backend.c | 2 +-
include/sysemu/xen-mapcache.h | 5 +++--
6 files changed, 22 insertions(+), 14 deletions(-)
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PULL 0/4] please pull xen-20170516-tag
@ 2017-05-16 19:19 ` Stefano Stabellini
0 siblings, 0 replies; 12+ messages in thread
From: Stefano Stabellini @ 2017-05-16 19:19 UTC (permalink / raw)
To: peter.maydell, stefanha
Cc: anthony.perard, xen-devel, sstabellini, qemu-devel, stefanha
The following changes since commit cdece0467c00007cf8e3f4b3c3f0b13bf2c4fea9:
block/win32: fix 'ret not initialized' warning (2017-05-16 15:34:18 +0100)
are available in the git repository at:
git://xenbits.xen.org/people/sstabellini/qemu-dm.git tags/xen-20170516-tag
for you to fetch changes up to 01cd90b641e1aed40cf13a577e6a737af94d55e7:
xen: call qemu_set_cloexec instead of fcntl (2017-05-16 11:51:25 -0700)
----------------------------------------------------------------
Xen 2017/05/16
----------------------------------------------------------------
Anthony PERARD (1):
configure: Remove -lxencall for Xen detection
Stefano Stabellini (3):
xen/mapcache: store dma information in revmapcache entries for debugging
xen/9pfs: fix two resource leaks on error paths, discovered by Coverity
xen: call qemu_set_cloexec instead of fcntl
configure | 2 +-
exec.c | 8 ++++----
hw/9pfs/xen-9p-backend.c | 4 +++-
hw/i386/xen/xen-mapcache.c | 15 ++++++++++-----
hw/xen/xen_backend.c | 2 +-
include/sysemu/xen-mapcache.h | 5 +++--
6 files changed, 22 insertions(+), 14 deletions(-)
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
https://lists.xen.org/xen-devel
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Qemu-devel] [PULL 1/4] xen/mapcache: store dma information in revmapcache entries for debugging
2017-05-16 19:19 ` Stefano Stabellini
@ 2017-05-16 19:21 ` Stefano Stabellini
-1 siblings, 0 replies; 12+ messages in thread
From: Stefano Stabellini @ 2017-05-16 19:21 UTC (permalink / raw)
To: peter.maydell, stefanha
Cc: sstabellini, stefanha, anthony.perard, xen-devel, qemu-devel
The Xen mapcache is able to create long term mappings, they are called
"locked" mappings. The third parameter of the xen_map_cache call
specifies if a mapping is a "locked" mapping.
>From the QEMU point of view there are two kinds of long term mappings:
[a] device memory mappings, such as option roms and video memory
[b] dma mappings, created by dma_memory_map & friends
After certain operations, ballooning a VM in particular, Xen asks QEMU
kindly to destroy all mappings. However, certainly [a] mappings are
present and cannot be removed. That's not a problem as they are not
affected by balloonning. The *real* problem is that if there are any
mappings of type [b], any outstanding dma operations could fail. This is
a known shortcoming. In other words, when Xen asks QEMU to destroy all
mappings, it is an error if any [b] mappings exist.
However today we have no way of distinguishing [a] from [b]. Because of
that, we cannot even print a decent warning.
This patch introduces a new "dma" bool field to MapCacheRev entires, to
remember if a given mapping is for dma or is a long term device memory
mapping. When xen_invalidate_map_cache is called, we print a warning if
any [b] mappings exist. We ignore [a] mappings.
Mappings created by qemu_map_ram_ptr are assumed to be [a], while
mappings created by address_space_map->qemu_ram_ptr_length are assumed
to be [b].
The goal of the patch is to make debugging and system understanding
easier.
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Anthony PERARD <anthony.perard@citrix.com>
---
exec.c | 8 ++++----
hw/i386/xen/xen-mapcache.c | 15 ++++++++++-----
include/sysemu/xen-mapcache.h | 5 +++--
3 files changed, 17 insertions(+), 11 deletions(-)
diff --git a/exec.c b/exec.c
index eac6085..85769e1 100644
--- a/exec.c
+++ b/exec.c
@@ -2084,10 +2084,10 @@ void *qemu_map_ram_ptr(RAMBlock *ram_block, ram_addr_t addr)
* In that case just map until the end of the page.
*/
if (block->offset == 0) {
- return xen_map_cache(addr, 0, 0);
+ return xen_map_cache(addr, 0, 0, false);
}
- block->host = xen_map_cache(block->offset, block->max_length, 1);
+ block->host = xen_map_cache(block->offset, block->max_length, 1, false);
}
return ramblock_ptr(block, addr);
}
@@ -2117,10 +2117,10 @@ static void *qemu_ram_ptr_length(RAMBlock *ram_block, ram_addr_t addr,
* In that case just map the requested area.
*/
if (block->offset == 0) {
- return xen_map_cache(addr, *size, 1);
+ return xen_map_cache(addr, *size, 1, true);
}
- block->host = xen_map_cache(block->offset, block->max_length, 1);
+ block->host = xen_map_cache(block->offset, block->max_length, 1, true);
}
return ramblock_ptr(block, addr);
diff --git a/hw/i386/xen/xen-mapcache.c b/hw/i386/xen/xen-mapcache.c
index 31debdf..e60156c 100644
--- a/hw/i386/xen/xen-mapcache.c
+++ b/hw/i386/xen/xen-mapcache.c
@@ -62,6 +62,7 @@ typedef struct MapCacheRev {
hwaddr paddr_index;
hwaddr size;
QTAILQ_ENTRY(MapCacheRev) next;
+ bool dma;
} MapCacheRev;
typedef struct MapCache {
@@ -202,7 +203,7 @@ static void xen_remap_bucket(MapCacheEntry *entry,
}
static uint8_t *xen_map_cache_unlocked(hwaddr phys_addr, hwaddr size,
- uint8_t lock)
+ uint8_t lock, bool dma)
{
MapCacheEntry *entry, *pentry = NULL;
hwaddr address_index;
@@ -289,6 +290,7 @@ tryagain:
if (lock) {
MapCacheRev *reventry = g_malloc0(sizeof(MapCacheRev));
entry->lock++;
+ reventry->dma = dma;
reventry->vaddr_req = mapcache->last_entry->vaddr_base + address_offset;
reventry->paddr_index = mapcache->last_entry->paddr_index;
reventry->size = entry->size;
@@ -300,12 +302,12 @@ tryagain:
}
uint8_t *xen_map_cache(hwaddr phys_addr, hwaddr size,
- uint8_t lock)
+ uint8_t lock, bool dma)
{
uint8_t *p;
mapcache_lock();
- p = xen_map_cache_unlocked(phys_addr, size, lock);
+ p = xen_map_cache_unlocked(phys_addr, size, lock, dma);
mapcache_unlock();
return p;
}
@@ -426,8 +428,11 @@ void xen_invalidate_map_cache(void)
mapcache_lock();
QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) {
- DPRINTF("There should be no locked mappings at this time, "
- "but "TARGET_FMT_plx" -> %p is present\n",
+ if (!reventry->dma) {
+ continue;
+ }
+ fprintf(stderr, "Locked DMA mapping while invalidating mapcache!"
+ " "TARGET_FMT_plx" -> %p is present\n",
reventry->paddr_index, reventry->vaddr_req);
}
diff --git a/include/sysemu/xen-mapcache.h b/include/sysemu/xen-mapcache.h
index b8c93b9..01daaad 100644
--- a/include/sysemu/xen-mapcache.h
+++ b/include/sysemu/xen-mapcache.h
@@ -17,7 +17,7 @@ typedef hwaddr (*phys_offset_to_gaddr_t)(hwaddr start_addr,
void xen_map_cache_init(phys_offset_to_gaddr_t f,
void *opaque);
uint8_t *xen_map_cache(hwaddr phys_addr, hwaddr size,
- uint8_t lock);
+ uint8_t lock, bool dma);
ram_addr_t xen_ram_addr_from_mapcache(void *ptr);
void xen_invalidate_map_cache_entry(uint8_t *buffer);
void xen_invalidate_map_cache(void);
@@ -31,7 +31,8 @@ static inline void xen_map_cache_init(phys_offset_to_gaddr_t f,
static inline uint8_t *xen_map_cache(hwaddr phys_addr,
hwaddr size,
- uint8_t lock)
+ uint8_t lock,
+ bool dma)
{
abort();
}
--
1.9.1
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PULL 1/4] xen/mapcache: store dma information in revmapcache entries for debugging
@ 2017-05-16 19:21 ` Stefano Stabellini
0 siblings, 0 replies; 12+ messages in thread
From: Stefano Stabellini @ 2017-05-16 19:21 UTC (permalink / raw)
To: peter.maydell, stefanha
Cc: anthony.perard, xen-devel, sstabellini, qemu-devel, stefanha
The Xen mapcache is able to create long term mappings, they are called
"locked" mappings. The third parameter of the xen_map_cache call
specifies if a mapping is a "locked" mapping.
>From the QEMU point of view there are two kinds of long term mappings:
[a] device memory mappings, such as option roms and video memory
[b] dma mappings, created by dma_memory_map & friends
After certain operations, ballooning a VM in particular, Xen asks QEMU
kindly to destroy all mappings. However, certainly [a] mappings are
present and cannot be removed. That's not a problem as they are not
affected by balloonning. The *real* problem is that if there are any
mappings of type [b], any outstanding dma operations could fail. This is
a known shortcoming. In other words, when Xen asks QEMU to destroy all
mappings, it is an error if any [b] mappings exist.
However today we have no way of distinguishing [a] from [b]. Because of
that, we cannot even print a decent warning.
This patch introduces a new "dma" bool field to MapCacheRev entires, to
remember if a given mapping is for dma or is a long term device memory
mapping. When xen_invalidate_map_cache is called, we print a warning if
any [b] mappings exist. We ignore [a] mappings.
Mappings created by qemu_map_ram_ptr are assumed to be [a], while
mappings created by address_space_map->qemu_ram_ptr_length are assumed
to be [b].
The goal of the patch is to make debugging and system understanding
easier.
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Anthony PERARD <anthony.perard@citrix.com>
---
exec.c | 8 ++++----
hw/i386/xen/xen-mapcache.c | 15 ++++++++++-----
include/sysemu/xen-mapcache.h | 5 +++--
3 files changed, 17 insertions(+), 11 deletions(-)
diff --git a/exec.c b/exec.c
index eac6085..85769e1 100644
--- a/exec.c
+++ b/exec.c
@@ -2084,10 +2084,10 @@ void *qemu_map_ram_ptr(RAMBlock *ram_block, ram_addr_t addr)
* In that case just map until the end of the page.
*/
if (block->offset == 0) {
- return xen_map_cache(addr, 0, 0);
+ return xen_map_cache(addr, 0, 0, false);
}
- block->host = xen_map_cache(block->offset, block->max_length, 1);
+ block->host = xen_map_cache(block->offset, block->max_length, 1, false);
}
return ramblock_ptr(block, addr);
}
@@ -2117,10 +2117,10 @@ static void *qemu_ram_ptr_length(RAMBlock *ram_block, ram_addr_t addr,
* In that case just map the requested area.
*/
if (block->offset == 0) {
- return xen_map_cache(addr, *size, 1);
+ return xen_map_cache(addr, *size, 1, true);
}
- block->host = xen_map_cache(block->offset, block->max_length, 1);
+ block->host = xen_map_cache(block->offset, block->max_length, 1, true);
}
return ramblock_ptr(block, addr);
diff --git a/hw/i386/xen/xen-mapcache.c b/hw/i386/xen/xen-mapcache.c
index 31debdf..e60156c 100644
--- a/hw/i386/xen/xen-mapcache.c
+++ b/hw/i386/xen/xen-mapcache.c
@@ -62,6 +62,7 @@ typedef struct MapCacheRev {
hwaddr paddr_index;
hwaddr size;
QTAILQ_ENTRY(MapCacheRev) next;
+ bool dma;
} MapCacheRev;
typedef struct MapCache {
@@ -202,7 +203,7 @@ static void xen_remap_bucket(MapCacheEntry *entry,
}
static uint8_t *xen_map_cache_unlocked(hwaddr phys_addr, hwaddr size,
- uint8_t lock)
+ uint8_t lock, bool dma)
{
MapCacheEntry *entry, *pentry = NULL;
hwaddr address_index;
@@ -289,6 +290,7 @@ tryagain:
if (lock) {
MapCacheRev *reventry = g_malloc0(sizeof(MapCacheRev));
entry->lock++;
+ reventry->dma = dma;
reventry->vaddr_req = mapcache->last_entry->vaddr_base + address_offset;
reventry->paddr_index = mapcache->last_entry->paddr_index;
reventry->size = entry->size;
@@ -300,12 +302,12 @@ tryagain:
}
uint8_t *xen_map_cache(hwaddr phys_addr, hwaddr size,
- uint8_t lock)
+ uint8_t lock, bool dma)
{
uint8_t *p;
mapcache_lock();
- p = xen_map_cache_unlocked(phys_addr, size, lock);
+ p = xen_map_cache_unlocked(phys_addr, size, lock, dma);
mapcache_unlock();
return p;
}
@@ -426,8 +428,11 @@ void xen_invalidate_map_cache(void)
mapcache_lock();
QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) {
- DPRINTF("There should be no locked mappings at this time, "
- "but "TARGET_FMT_plx" -> %p is present\n",
+ if (!reventry->dma) {
+ continue;
+ }
+ fprintf(stderr, "Locked DMA mapping while invalidating mapcache!"
+ " "TARGET_FMT_plx" -> %p is present\n",
reventry->paddr_index, reventry->vaddr_req);
}
diff --git a/include/sysemu/xen-mapcache.h b/include/sysemu/xen-mapcache.h
index b8c93b9..01daaad 100644
--- a/include/sysemu/xen-mapcache.h
+++ b/include/sysemu/xen-mapcache.h
@@ -17,7 +17,7 @@ typedef hwaddr (*phys_offset_to_gaddr_t)(hwaddr start_addr,
void xen_map_cache_init(phys_offset_to_gaddr_t f,
void *opaque);
uint8_t *xen_map_cache(hwaddr phys_addr, hwaddr size,
- uint8_t lock);
+ uint8_t lock, bool dma);
ram_addr_t xen_ram_addr_from_mapcache(void *ptr);
void xen_invalidate_map_cache_entry(uint8_t *buffer);
void xen_invalidate_map_cache(void);
@@ -31,7 +31,8 @@ static inline void xen_map_cache_init(phys_offset_to_gaddr_t f,
static inline uint8_t *xen_map_cache(hwaddr phys_addr,
hwaddr size,
- uint8_t lock)
+ uint8_t lock,
+ bool dma)
{
abort();
}
--
1.9.1
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
https://lists.xen.org/xen-devel
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [Qemu-devel] [PULL 2/4] configure: Remove -lxencall for Xen detection
2017-05-16 19:21 ` Stefano Stabellini
@ 2017-05-16 19:21 ` Stefano Stabellini
-1 siblings, 0 replies; 12+ messages in thread
From: Stefano Stabellini @ 2017-05-16 19:21 UTC (permalink / raw)
To: peter.maydell, stefanha
Cc: sstabellini, stefanha, anthony.perard, xen-devel, qemu-devel
From: Anthony PERARD <anthony.perard@citrix.com>
QEMU does not depends on libxencall, it was added because it was a
missing link dependency of libxendevicemodel, but now the later should
be built properly.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
---
configure | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/configure b/configure
index 57b5ae6..139638e 100755
--- a/configure
+++ b/configure
@@ -2015,7 +2015,7 @@ if test "$xen" != "no" ; then
else
xen_libs="-lxenstore -lxenctrl -lxenguest"
- xen_stable_libs="-lxencall -lxenforeignmemory -lxengnttab -lxenevtchn"
+ xen_stable_libs="-lxenforeignmemory -lxengnttab -lxenevtchn"
# First we test whether Xen headers and libraries are available.
# If no, we are done and there is no Xen support.
--
1.9.1
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PULL 2/4] configure: Remove -lxencall for Xen detection
@ 2017-05-16 19:21 ` Stefano Stabellini
0 siblings, 0 replies; 12+ messages in thread
From: Stefano Stabellini @ 2017-05-16 19:21 UTC (permalink / raw)
To: peter.maydell, stefanha
Cc: anthony.perard, xen-devel, sstabellini, qemu-devel, stefanha
From: Anthony PERARD <anthony.perard@citrix.com>
QEMU does not depends on libxencall, it was added because it was a
missing link dependency of libxendevicemodel, but now the later should
be built properly.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
---
configure | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/configure b/configure
index 57b5ae6..139638e 100755
--- a/configure
+++ b/configure
@@ -2015,7 +2015,7 @@ if test "$xen" != "no" ; then
else
xen_libs="-lxenstore -lxenctrl -lxenguest"
- xen_stable_libs="-lxencall -lxenforeignmemory -lxengnttab -lxenevtchn"
+ xen_stable_libs="-lxenforeignmemory -lxengnttab -lxenevtchn"
# First we test whether Xen headers and libraries are available.
# If no, we are done and there is no Xen support.
--
1.9.1
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
https://lists.xen.org/xen-devel
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [Qemu-devel] [PULL 3/4] xen/9pfs: fix two resource leaks on error paths, discovered by Coverity
2017-05-16 19:21 ` Stefano Stabellini
@ 2017-05-16 19:21 ` Stefano Stabellini
-1 siblings, 0 replies; 12+ messages in thread
From: Stefano Stabellini @ 2017-05-16 19:21 UTC (permalink / raw)
To: peter.maydell, stefanha
Cc: sstabellini, stefanha, anthony.perard, xen-devel, qemu-devel,
groug, aneesh.kumar
CID: 1374836
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
CC: anthony.perard@citrix.com
CC: groug@kaod.org
CC: aneesh.kumar@linux.vnet.ibm.com
---
hw/9pfs/xen-9p-backend.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/hw/9pfs/xen-9p-backend.c b/hw/9pfs/xen-9p-backend.c
index 9c7f41a..a1fdede 100644
--- a/hw/9pfs/xen-9p-backend.c
+++ b/hw/9pfs/xen-9p-backend.c
@@ -332,12 +332,14 @@ static int xen_9pfs_connect(struct XenDevice *xendev)
str = g_strdup_printf("ring-ref%u", i);
if (xenstore_read_fe_int(&xen_9pdev->xendev, str,
&xen_9pdev->rings[i].ref) == -1) {
+ g_free(str);
goto out;
}
g_free(str);
str = g_strdup_printf("event-channel-%u", i);
if (xenstore_read_fe_int(&xen_9pdev->xendev, str,
&xen_9pdev->rings[i].evtchn) == -1) {
+ g_free(str);
goto out;
}
g_free(str);
--
1.9.1
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PULL 3/4] xen/9pfs: fix two resource leaks on error paths, discovered by Coverity
@ 2017-05-16 19:21 ` Stefano Stabellini
0 siblings, 0 replies; 12+ messages in thread
From: Stefano Stabellini @ 2017-05-16 19:21 UTC (permalink / raw)
To: peter.maydell, stefanha
Cc: sstabellini, qemu-devel, groug, aneesh.kumar, stefanha,
anthony.perard, xen-devel
CID: 1374836
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
CC: anthony.perard@citrix.com
CC: groug@kaod.org
CC: aneesh.kumar@linux.vnet.ibm.com
---
hw/9pfs/xen-9p-backend.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/hw/9pfs/xen-9p-backend.c b/hw/9pfs/xen-9p-backend.c
index 9c7f41a..a1fdede 100644
--- a/hw/9pfs/xen-9p-backend.c
+++ b/hw/9pfs/xen-9p-backend.c
@@ -332,12 +332,14 @@ static int xen_9pfs_connect(struct XenDevice *xendev)
str = g_strdup_printf("ring-ref%u", i);
if (xenstore_read_fe_int(&xen_9pdev->xendev, str,
&xen_9pdev->rings[i].ref) == -1) {
+ g_free(str);
goto out;
}
g_free(str);
str = g_strdup_printf("event-channel-%u", i);
if (xenstore_read_fe_int(&xen_9pdev->xendev, str,
&xen_9pdev->rings[i].evtchn) == -1) {
+ g_free(str);
goto out;
}
g_free(str);
--
1.9.1
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
https://lists.xen.org/xen-devel
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [Qemu-devel] [PULL 4/4] xen: call qemu_set_cloexec instead of fcntl
2017-05-16 19:21 ` Stefano Stabellini
@ 2017-05-16 19:21 ` Stefano Stabellini
-1 siblings, 0 replies; 12+ messages in thread
From: Stefano Stabellini @ 2017-05-16 19:21 UTC (permalink / raw)
To: peter.maydell, stefanha
Cc: sstabellini, stefanha, anthony.perard, xen-devel, qemu-devel,
groug, aneesh.kumar, Eric Blake
Use the common utility function, which contains checks on return values
and first calls F_GETFD as recommended by POSIX.1-2001, instead of
manually calling fcntl.
CID: 1374831
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
CC: anthony.perard@citrix.com
CC: groug@kaod.org
CC: aneesh.kumar@linux.vnet.ibm.com
CC: Eric Blake <eblake@redhat.com>
---
hw/9pfs/xen-9p-backend.c | 2 +-
hw/xen/xen_backend.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/hw/9pfs/xen-9p-backend.c b/hw/9pfs/xen-9p-backend.c
index a1fdede..5df97c9 100644
--- a/hw/9pfs/xen-9p-backend.c
+++ b/hw/9pfs/xen-9p-backend.c
@@ -380,7 +380,7 @@ static int xen_9pfs_connect(struct XenDevice *xendev)
if (xen_9pdev->rings[i].evtchndev == NULL) {
goto out;
}
- fcntl(xenevtchn_fd(xen_9pdev->rings[i].evtchndev), F_SETFD, FD_CLOEXEC);
+ qemu_set_cloexec(xenevtchn_fd(xen_9pdev->rings[i].evtchndev));
xen_9pdev->rings[i].local_port = xenevtchn_bind_interdomain
(xen_9pdev->rings[i].evtchndev,
xendev->dom,
diff --git a/hw/xen/xen_backend.c b/hw/xen/xen_backend.c
index c85f163..2cac47d 100644
--- a/hw/xen/xen_backend.c
+++ b/hw/xen/xen_backend.c
@@ -147,7 +147,7 @@ static struct XenDevice *xen_be_get_xendev(const char *type, int dom, int dev,
qdev_unplug(DEVICE(xendev), NULL);
return NULL;
}
- fcntl(xenevtchn_fd(xendev->evtchndev), F_SETFD, FD_CLOEXEC);
+ qemu_set_cloexec(xenevtchn_fd(xendev->evtchndev));
if (ops->flags & DEVOPS_FLAG_NEED_GNTDEV) {
xendev->gnttabdev = xengnttab_open(NULL, 0);
--
1.9.1
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PULL 4/4] xen: call qemu_set_cloexec instead of fcntl
@ 2017-05-16 19:21 ` Stefano Stabellini
0 siblings, 0 replies; 12+ messages in thread
From: Stefano Stabellini @ 2017-05-16 19:21 UTC (permalink / raw)
To: peter.maydell, stefanha
Cc: sstabellini, qemu-devel, groug, aneesh.kumar, stefanha,
anthony.perard, xen-devel, Eric Blake
Use the common utility function, which contains checks on return values
and first calls F_GETFD as recommended by POSIX.1-2001, instead of
manually calling fcntl.
CID: 1374831
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
CC: anthony.perard@citrix.com
CC: groug@kaod.org
CC: aneesh.kumar@linux.vnet.ibm.com
CC: Eric Blake <eblake@redhat.com>
---
hw/9pfs/xen-9p-backend.c | 2 +-
hw/xen/xen_backend.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/hw/9pfs/xen-9p-backend.c b/hw/9pfs/xen-9p-backend.c
index a1fdede..5df97c9 100644
--- a/hw/9pfs/xen-9p-backend.c
+++ b/hw/9pfs/xen-9p-backend.c
@@ -380,7 +380,7 @@ static int xen_9pfs_connect(struct XenDevice *xendev)
if (xen_9pdev->rings[i].evtchndev == NULL) {
goto out;
}
- fcntl(xenevtchn_fd(xen_9pdev->rings[i].evtchndev), F_SETFD, FD_CLOEXEC);
+ qemu_set_cloexec(xenevtchn_fd(xen_9pdev->rings[i].evtchndev));
xen_9pdev->rings[i].local_port = xenevtchn_bind_interdomain
(xen_9pdev->rings[i].evtchndev,
xendev->dom,
diff --git a/hw/xen/xen_backend.c b/hw/xen/xen_backend.c
index c85f163..2cac47d 100644
--- a/hw/xen/xen_backend.c
+++ b/hw/xen/xen_backend.c
@@ -147,7 +147,7 @@ static struct XenDevice *xen_be_get_xendev(const char *type, int dom, int dev,
qdev_unplug(DEVICE(xendev), NULL);
return NULL;
}
- fcntl(xenevtchn_fd(xendev->evtchndev), F_SETFD, FD_CLOEXEC);
+ qemu_set_cloexec(xenevtchn_fd(xendev->evtchndev));
if (ops->flags & DEVOPS_FLAG_NEED_GNTDEV) {
xendev->gnttabdev = xengnttab_open(NULL, 0);
--
1.9.1
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
https://lists.xen.org/xen-devel
^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [Qemu-devel] [PULL 0/4] please pull xen-20170516-tag
2017-05-16 19:19 ` Stefano Stabellini
@ 2017-05-17 13:04 ` Stefan Hajnoczi
-1 siblings, 0 replies; 12+ messages in thread
From: Stefan Hajnoczi @ 2017-05-17 13:04 UTC (permalink / raw)
To: Stefano Stabellini
Cc: peter.maydell, stefanha, anthony.perard, xen-devel, qemu-devel
[-- Attachment #1: Type: text/plain, Size: 1446 bytes --]
On Tue, May 16, 2017 at 12:19:26PM -0700, Stefano Stabellini wrote:
> The following changes since commit cdece0467c00007cf8e3f4b3c3f0b13bf2c4fea9:
>
> block/win32: fix 'ret not initialized' warning (2017-05-16 15:34:18 +0100)
>
> are available in the git repository at:
>
> git://xenbits.xen.org/people/sstabellini/qemu-dm.git tags/xen-20170516-tag
>
> for you to fetch changes up to 01cd90b641e1aed40cf13a577e6a737af94d55e7:
>
> xen: call qemu_set_cloexec instead of fcntl (2017-05-16 11:51:25 -0700)
>
> ----------------------------------------------------------------
> Xen 2017/05/16
>
> ----------------------------------------------------------------
> Anthony PERARD (1):
> configure: Remove -lxencall for Xen detection
>
> Stefano Stabellini (3):
> xen/mapcache: store dma information in revmapcache entries for debugging
> xen/9pfs: fix two resource leaks on error paths, discovered by Coverity
> xen: call qemu_set_cloexec instead of fcntl
>
> configure | 2 +-
> exec.c | 8 ++++----
> hw/9pfs/xen-9p-backend.c | 4 +++-
> hw/i386/xen/xen-mapcache.c | 15 ++++++++++-----
> hw/xen/xen_backend.c | 2 +-
> include/sysemu/xen-mapcache.h | 5 +++--
> 6 files changed, 22 insertions(+), 14 deletions(-)
Thanks, applied to my staging tree:
https://github.com/stefanha/qemu/commits/staging
Stefan
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^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PULL 0/4] please pull xen-20170516-tag
@ 2017-05-17 13:04 ` Stefan Hajnoczi
0 siblings, 0 replies; 12+ messages in thread
From: Stefan Hajnoczi @ 2017-05-17 13:04 UTC (permalink / raw)
To: Stefano Stabellini
Cc: anthony.perard, peter.maydell, qemu-devel, stefanha, xen-devel
[-- Attachment #1.1: Type: text/plain, Size: 1446 bytes --]
On Tue, May 16, 2017 at 12:19:26PM -0700, Stefano Stabellini wrote:
> The following changes since commit cdece0467c00007cf8e3f4b3c3f0b13bf2c4fea9:
>
> block/win32: fix 'ret not initialized' warning (2017-05-16 15:34:18 +0100)
>
> are available in the git repository at:
>
> git://xenbits.xen.org/people/sstabellini/qemu-dm.git tags/xen-20170516-tag
>
> for you to fetch changes up to 01cd90b641e1aed40cf13a577e6a737af94d55e7:
>
> xen: call qemu_set_cloexec instead of fcntl (2017-05-16 11:51:25 -0700)
>
> ----------------------------------------------------------------
> Xen 2017/05/16
>
> ----------------------------------------------------------------
> Anthony PERARD (1):
> configure: Remove -lxencall for Xen detection
>
> Stefano Stabellini (3):
> xen/mapcache: store dma information in revmapcache entries for debugging
> xen/9pfs: fix two resource leaks on error paths, discovered by Coverity
> xen: call qemu_set_cloexec instead of fcntl
>
> configure | 2 +-
> exec.c | 8 ++++----
> hw/9pfs/xen-9p-backend.c | 4 +++-
> hw/i386/xen/xen-mapcache.c | 15 ++++++++++-----
> hw/xen/xen_backend.c | 2 +-
> include/sysemu/xen-mapcache.h | 5 +++--
> 6 files changed, 22 insertions(+), 14 deletions(-)
Thanks, applied to my staging tree:
https://github.com/stefanha/qemu/commits/staging
Stefan
[-- Attachment #1.2: signature.asc --]
[-- Type: application/pgp-signature, Size: 455 bytes --]
[-- Attachment #2: Type: text/plain, Size: 127 bytes --]
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
https://lists.xen.org/xen-devel
^ permalink raw reply [flat|nested] 12+ messages in thread
end of thread, other threads:[~2017-05-17 13:04 UTC | newest]
Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-05-16 19:19 [Qemu-devel] [PULL 0/4] please pull xen-20170516-tag Stefano Stabellini
2017-05-16 19:19 ` Stefano Stabellini
2017-05-16 19:21 ` [Qemu-devel] [PULL 1/4] xen/mapcache: store dma information in revmapcache entries for debugging Stefano Stabellini
2017-05-16 19:21 ` Stefano Stabellini
2017-05-16 19:21 ` [Qemu-devel] [PULL 2/4] configure: Remove -lxencall for Xen detection Stefano Stabellini
2017-05-16 19:21 ` Stefano Stabellini
2017-05-16 19:21 ` [Qemu-devel] [PULL 3/4] xen/9pfs: fix two resource leaks on error paths, discovered by Coverity Stefano Stabellini
2017-05-16 19:21 ` Stefano Stabellini
2017-05-16 19:21 ` [Qemu-devel] [PULL 4/4] xen: call qemu_set_cloexec instead of fcntl Stefano Stabellini
2017-05-16 19:21 ` Stefano Stabellini
2017-05-17 13:04 ` [Qemu-devel] [PULL 0/4] please pull xen-20170516-tag Stefan Hajnoczi
2017-05-17 13:04 ` Stefan Hajnoczi
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