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由 Greg Kurz 提交于
If several threads concurrently call readdir() with the same directory stream pointer, it is possible that they all get a pointer to the same dirent structure, whose content is overwritten each time readdir() is called. We must thus serialize accesses to the dirent structure. This may be achieved with a mutex like below: lock_mutex(); readdir(); // work with the dirent unlock_mutex(); This patch adds all the locking, to prepare the switch to readdir(). Reviewed-by: NEric Blake <eblake@redhat.com> Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
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