diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-23 11:47:02 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-23 11:47:02 -0700 |
commit | 5f05647dd81c11a6a165ccc8f0c1370b16f3bcb0 (patch) | |
tree | 7851ef1c93aa1aba7ef327ca4b75fd35e6d10f29 /drivers/vhost/vhost.c | |
parent | 02f36038c568111ad4fc433f6fa760ff5e38fab4 (diff) | |
parent | ec37a48d1d16c30b655ac5280209edf52a6775d4 (diff) | |
download | linux-3.10-5f05647dd81c11a6a165ccc8f0c1370b16f3bcb0.tar.gz linux-3.10-5f05647dd81c11a6a165ccc8f0c1370b16f3bcb0.tar.bz2 linux-3.10-5f05647dd81c11a6a165ccc8f0c1370b16f3bcb0.zip |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1699 commits)
bnx2/bnx2x: Unsupported Ethtool operations should return -EINVAL.
vlan: Calling vlan_hwaccel_do_receive() is always valid.
tproxy: use the interface primary IP address as a default value for --on-ip
tproxy: added IPv6 support to the socket match
cxgb3: function namespace cleanup
tproxy: added IPv6 support to the TPROXY target
tproxy: added IPv6 socket lookup function to nf_tproxy_core
be2net: Changes to use only priority codes allowed by f/w
tproxy: allow non-local binds of IPv6 sockets if IP_TRANSPARENT is enabled
tproxy: added tproxy sockopt interface in the IPV6 layer
tproxy: added udp6_lib_lookup function
tproxy: added const specifiers to udp lookup functions
tproxy: split off ipv6 defragmentation to a separate module
l2tp: small cleanup
nf_nat: restrict ICMP translation for embedded header
can: mcp251x: fix generation of error frames
can: mcp251x: fix endless loop in interrupt handler if CANINTF_MERRF is set
can-raw: add msg_flags to distinguish local traffic
9p: client code cleanup
rds: make local functions/variables static
...
Fix up conflicts in net/core/dev.c, drivers/net/pcmcia/smc91c92_cs.c and
drivers/net/wireless/ath/ath9k/debug.c as per David
Diffstat (limited to 'drivers/vhost/vhost.c')
-rw-r--r-- | drivers/vhost/vhost.c | 51 |
1 files changed, 49 insertions, 2 deletions
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index 8b5a1b33d0f..94701ff3a23 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -212,6 +212,45 @@ static int vhost_worker(void *data) } } +/* Helper to allocate iovec buffers for all vqs. */ +static long vhost_dev_alloc_iovecs(struct vhost_dev *dev) +{ + int i; + for (i = 0; i < dev->nvqs; ++i) { + dev->vqs[i].indirect = kmalloc(sizeof *dev->vqs[i].indirect * + UIO_MAXIOV, GFP_KERNEL); + dev->vqs[i].log = kmalloc(sizeof *dev->vqs[i].log * UIO_MAXIOV, + GFP_KERNEL); + dev->vqs[i].heads = kmalloc(sizeof *dev->vqs[i].heads * + UIO_MAXIOV, GFP_KERNEL); + + if (!dev->vqs[i].indirect || !dev->vqs[i].log || + !dev->vqs[i].heads) + goto err_nomem; + } + return 0; +err_nomem: + for (; i >= 0; --i) { + kfree(dev->vqs[i].indirect); + kfree(dev->vqs[i].log); + kfree(dev->vqs[i].heads); + } + return -ENOMEM; +} + +static void vhost_dev_free_iovecs(struct vhost_dev *dev) +{ + int i; + for (i = 0; i < dev->nvqs; ++i) { + kfree(dev->vqs[i].indirect); + dev->vqs[i].indirect = NULL; + kfree(dev->vqs[i].log); + dev->vqs[i].log = NULL; + kfree(dev->vqs[i].heads); + dev->vqs[i].heads = NULL; + } +} + long vhost_dev_init(struct vhost_dev *dev, struct vhost_virtqueue *vqs, int nvqs) { @@ -229,6 +268,9 @@ long vhost_dev_init(struct vhost_dev *dev, dev->worker = NULL; for (i = 0; i < dev->nvqs; ++i) { + dev->vqs[i].log = NULL; + dev->vqs[i].indirect = NULL; + dev->vqs[i].heads = NULL; dev->vqs[i].dev = dev; mutex_init(&dev->vqs[i].mutex); vhost_vq_reset(dev, dev->vqs + i); @@ -295,6 +337,10 @@ static long vhost_dev_set_owner(struct vhost_dev *dev) if (err) goto err_cgroup; + err = vhost_dev_alloc_iovecs(dev); + if (err) + goto err_cgroup; + return 0; err_cgroup: kthread_stop(worker); @@ -345,6 +391,7 @@ void vhost_dev_cleanup(struct vhost_dev *dev) fput(dev->vqs[i].call); vhost_vq_reset(dev, dev->vqs + i); } + vhost_dev_free_iovecs(dev); if (dev->log_ctx) eventfd_ctx_put(dev->log_ctx); dev->log_ctx = NULL; @@ -372,7 +419,7 @@ static int log_access_ok(void __user *log_base, u64 addr, unsigned long sz) /* Make sure 64 bit math will not overflow. */ if (a > ULONG_MAX - (unsigned long)log_base || a + (unsigned long)log_base > ULONG_MAX) - return -EFAULT; + return 0; return access_ok(VERIFY_WRITE, log_base + a, (sz + VHOST_PAGE_SIZE * 8 - 1) / VHOST_PAGE_SIZE / 8); @@ -957,7 +1004,7 @@ static int get_indirect(struct vhost_dev *dev, struct vhost_virtqueue *vq, } ret = translate_desc(dev, indirect->addr, indirect->len, vq->indirect, - ARRAY_SIZE(vq->indirect)); + UIO_MAXIOV); if (unlikely(ret < 0)) { vq_err(vq, "Translation failure %d in indirect.\n", ret); return ret; |