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afb13302aa
This patch fixes a race in async lock request handling between adding the relevant struct nlm_block to nlm_blocked list after the request was sent by vfs_lock_file() and nlmsvc_grant_deferred() does a lookup of the nlm_block in the nlm_blocked list. It could be that the async request is completed before the nlm_block was added to the list. This would end in a -ENOENT and a kernel log message of "lockd: grant for unknown block". To solve this issue we add the nlm_block before the vfs_lock_file() call to be sure it has been added when a possible nlmsvc_grant_deferred() is called. If the vfs_lock_file() results in an case when it wouldn't be added to nlm_blocked list, the nlm_block struct will be removed from this list again. Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Alexander Aring <aahringo@redhat.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> |
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| .. | ||
| clnt4xdr.c | ||
| clntlock.c | ||
| clntproc.c | ||
| clntxdr.c | ||
| host.c | ||
| Makefile | ||
| mon.c | ||
| netns.h | ||
| procfs.c | ||
| procfs.h | ||
| svc4proc.c | ||
| svc.c | ||
| svclock.c | ||
| svcproc.c | ||
| svcshare.c | ||
| svcsubs.c | ||
| svcxdr.h | ||
| trace.c | ||
| trace.h | ||
| xdr4.c | ||
| xdr.c | ||