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authorJeff Moyer <jmoyer@redhat.com>2018-06-27 18:43:58 +0300
committerDan Williams <dan.j.williams@intel.com>2018-06-29 04:23:36 +0300
commit5a14e91d559aee5bdb0e002e1153fd9c4338a29e (patch)
tree4cd74413f8124e74127e501c1067f736a45098bf /drivers/dax
parentb62cc6fdd793eaac50e4191c8637ffff9e9574d6 (diff)
downloadlinux-5a14e91d559aee5bdb0e002e1153fd9c4338a29e.tar.xz
dev-dax: check_vma: ratelimit dev_info-s
This is easily triggered from userspace, so let's ratelimit the messages. Signed-off-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dax')
-rw-r--r--drivers/dax/device.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/dax/device.c b/drivers/dax/device.c
index de2f8297a210..108c37fca782 100644
--- a/drivers/dax/device.c
+++ b/drivers/dax/device.c
@@ -189,14 +189,16 @@ static int check_vma(struct dev_dax *dev_dax, struct vm_area_struct *vma,
/* prevent private mappings from being established */
if ((vma->vm_flags & VM_MAYSHARE) != VM_MAYSHARE) {
- dev_info(dev, "%s: %s: fail, attempted private mapping\n",
+ dev_info_ratelimited(dev,
+ "%s: %s: fail, attempted private mapping\n",
current->comm, func);
return -EINVAL;
}
mask = dax_region->align - 1;
if (vma->vm_start & mask || vma->vm_end & mask) {
- dev_info(dev, "%s: %s: fail, unaligned vma (%#lx - %#lx, %#lx)\n",
+ dev_info_ratelimited(dev,
+ "%s: %s: fail, unaligned vma (%#lx - %#lx, %#lx)\n",
current->comm, func, vma->vm_start, vma->vm_end,
mask);
return -EINVAL;
@@ -204,13 +206,15 @@ static int check_vma(struct dev_dax *dev_dax, struct vm_area_struct *vma,
if ((dax_region->pfn_flags & (PFN_DEV|PFN_MAP)) == PFN_DEV
&& (vma->vm_flags & VM_DONTCOPY) == 0) {
- dev_info(dev, "%s: %s: fail, dax range requires MADV_DONTFORK\n",
+ dev_info_ratelimited(dev,
+ "%s: %s: fail, dax range requires MADV_DONTFORK\n",
current->comm, func);
return -EINVAL;
}
if (!vma_is_dax(vma)) {
- dev_info(dev, "%s: %s: fail, vma is not DAX capable\n",
+ dev_info_ratelimited(dev,
+ "%s: %s: fail, vma is not DAX capable\n",
current->comm, func);
return -EINVAL;
}