Searched hist:"7 cde47d4" (Results 1 – 2 of 2) sorted by relevance
| /openbmc/qemu/hw/9pfs/ |
| H A D | 9p.h | 7cde47d4 Mon Jun 06 04:52:34 CDT 2016 Greg Kurz <gkurz@linux.vnet.ibm.com> 9p: add locking to V9fsDir
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: Eric Blake <eblake@redhat.com>
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
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| H A D | 9p.c | 7cde47d4 Mon Jun 06 04:52:34 CDT 2016 Greg Kurz <gkurz@linux.vnet.ibm.com> 9p: add locking to V9fsDir
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: Eric Blake <eblake@redhat.com>
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
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