Re: [libvirt] [v2] storage: Ignore dangling symbol link for filesystem pool
On 12/20/2010 12:14 AM, Osier Yang wrote:
If there is a dangling symbol link in filesystem pool, the pool
s/symbol/symbolic/
will be failed to start or refresh, this patch is to fix it by
s/will be failed/will fail/
ignoring it with a warning log.
@@ -986,6 +988,12 @@ virStorageBackendVolOpenCheckMode(const char
*path, unsigned int flags)
struct stat sb;
if ((fd = open(path, O_RDONLY|O_NONBLOCK|O_NOCTTY)) < 0) {
+ if (areadlink(path)) {
+ VIR_WARN("cannot open volume '%s': %s", path,
+ strerror(errno));
+ return -2;
Memory leak - areadlink() returns a malloc()d string that the user must
free. Also, areadlink() is expensive (in addition to malloc(), it makes
several syscalls); a more efficient solution would be to check if errno
is ELOOP or ENOENT (the only possibilities for a dangling symlink; any
other error should return -1), and in those two cases a successful
lstat() is sufficient to detect a broken symlink without resorting to
reading its contents.
--
Eric Blake eblake(a)redhat.com +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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