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path: root/fs/9p/xattr.h
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/*
 * Copyright IBM Corporation, 2010
 * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2.1 of the GNU Lesser General Public License
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 */
#ifndef FS_9P_XATTR_H
#define FS_9P_XATTR_H

#include <linux/xattr.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>

extern const struct xattr_handler *v9fs_xattr_handlers[];
extern const struct xattr_handler v9fs_xattr_acl_access_handler;
extern const struct xattr_handler v9fs_xattr_acl_default_handler;

extern ssize_t v9fs_fid_xattr_get(struct p9_fid *, const char *,
				  void *, size_t);
extern ssize_t v9fs_xattr_get(struct dentry *, const char *,
			      void *, size_t);
extern int v9fs_fid_xattr_set(struct p9_fid *, const char *,
			  const void *, size_t, int);
extern int v9fs_xattr_set(struct dentry *, const char *,
			  const void *, size_t, int);
extern ssize_t v9fs_listxattr(struct dentry *, char *, size_t);
#endif /* FS_9P_XATTR_H */
s a kernel thread at start of the tracer. It is pinned to a single CPU and will move to the next CPU after each period of running. If the user modifies the migration thread's affinity, it will not change after that happens. The original code created the thread at the first instance it was called, but later was changed to destroy the thread after the tracer was finished, and would not be created until the next instance of the tracer was established. The code that initialized the affinity was only called on the initial instantiation of the tracer. After that, it was not initialized, and the previous affinity did not match the current newly created one, making it appear that the user modified the thread's affinity when it did not, and the thread failed to migrate again. Cc: stable@vger.kernel.org Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'fs/nfsd/nfs3acl.c')