mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 08:44:21 +08:00
09430aba3a
There were two flags (s_flags and s_cache) which had incorrect signed
type in the parameters of the file cache mode helper function.
Cc: stable@vger.kernel.org
Fixes: 1543b4c507 ("fs/9p: remove writeback fid and fix per-file modes")
Reviewed-by: Dominique Martinet <asmadeus@codewreck.org>
Signed-off-by: Eric Van Hensbergen <ericvh@kernel.org>
65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* V9FS FID Management
|
|
*
|
|
* Copyright (C) 2005 by Eric Van Hensbergen <ericvh@gmail.com>
|
|
*/
|
|
#ifndef FS_9P_FID_H
|
|
#define FS_9P_FID_H
|
|
#include <linux/list.h>
|
|
#include "v9fs.h"
|
|
|
|
struct p9_fid *v9fs_fid_find_inode(struct inode *inode, bool want_writeable,
|
|
kuid_t uid, bool any);
|
|
struct p9_fid *v9fs_fid_lookup(struct dentry *dentry);
|
|
static inline struct p9_fid *v9fs_parent_fid(struct dentry *dentry)
|
|
{
|
|
return v9fs_fid_lookup(dentry->d_parent);
|
|
}
|
|
void v9fs_fid_add(struct dentry *dentry, struct p9_fid **fid);
|
|
void v9fs_open_fid_add(struct inode *inode, struct p9_fid **fid);
|
|
static inline struct p9_fid *clone_fid(struct p9_fid *fid)
|
|
{
|
|
return IS_ERR(fid) ? fid : p9_client_walk(fid, 0, NULL, 1);
|
|
}
|
|
static inline struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
|
|
{
|
|
struct p9_fid *fid, *nfid;
|
|
|
|
fid = v9fs_fid_lookup(dentry);
|
|
if (!fid || IS_ERR(fid))
|
|
return fid;
|
|
|
|
nfid = clone_fid(fid);
|
|
p9_fid_put(fid);
|
|
return nfid;
|
|
}
|
|
/**
|
|
* v9fs_fid_addmodes - add cache flags to fid mode (for client use only)
|
|
* @fid: fid to augment
|
|
* @s_flags: session info mount flags
|
|
* @s_cache: session info cache flags
|
|
* @f_flags: unix open flags
|
|
*
|
|
* make sure mode reflects flags of underlying mounts
|
|
* also qid.version == 0 reflects a synthetic or legacy file system
|
|
* NOTE: these are set after open so only reflect 9p client not
|
|
* underlying file system on server.
|
|
*/
|
|
static inline void v9fs_fid_add_modes(struct p9_fid *fid, unsigned int s_flags,
|
|
unsigned int s_cache, unsigned int f_flags)
|
|
{
|
|
if (fid->qid.type != P9_QTFILE)
|
|
return;
|
|
|
|
if ((!s_cache) ||
|
|
((fid->qid.version == 0) && !(s_flags & V9FS_IGNORE_QV)) ||
|
|
(s_flags & V9FS_DIRECT_IO) || (f_flags & O_DIRECT)) {
|
|
fid->mode |= P9L_DIRECT; /* no read or write cache */
|
|
} else if ((!(s_cache & CACHE_WRITEBACK)) ||
|
|
(f_flags & O_DSYNC) || (s_flags & V9FS_SYNC)) {
|
|
fid->mode |= P9L_NOWRITECACHE;
|
|
}
|
|
}
|
|
#endif
|