expfs.c (5b825c3af1d8a0af4deb4a5eb349d0d0050c62e5) expfs.c (a528d35e8bfcc521d7cb70aaf03e1bd296c8493f)
1/*
2 * Copyright (C) Neil Brown 2002
3 * Copyright (C) Christoph Hellwig 2007
4 *
5 * This file contains the code mapping from inodes to NFS file handles,
6 * and for mapping back from file handles to dentries.
7 *
8 * For details on why we do all the strange and hairy things in here
9 * take a look at Documentation/filesystems/nfs/Exporting.
10 */
11#include <linux/exportfs.h>
12#include <linux/fs.h>
13#include <linux/file.h>
14#include <linux/module.h>
15#include <linux/mount.h>
16#include <linux/namei.h>
17#include <linux/sched.h>
1/*
2 * Copyright (C) Neil Brown 2002
3 * Copyright (C) Christoph Hellwig 2007
4 *
5 * This file contains the code mapping from inodes to NFS file handles,
6 * and for mapping back from file handles to dentries.
7 *
8 * For details on why we do all the strange and hairy things in here
9 * take a look at Documentation/filesystems/nfs/Exporting.
10 */
11#include <linux/exportfs.h>
12#include <linux/fs.h>
13#include <linux/file.h>
14#include <linux/module.h>
15#include <linux/mount.h>
16#include <linux/namei.h>
17#include <linux/sched.h>
18#include <linux/cred.h>
19
20#define dprintk(fmt, args...) do{}while(0)
21
22
23static int get_name(const struct path *path, char *name, struct dentry *child);
24
25
26static int exportfs_get_name(struct vfsmount *mnt, struct dentry *dir,

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295 if (!dir->i_fop)
296 goto out;
297 /*
298 * inode->i_ino is unsigned long, kstat->ino is u64, so the
299 * former would be insufficient on 32-bit hosts when the
300 * filesystem supports 64-bit inode numbers. So we need to
301 * actually call ->getattr, not just read i_ino:
302 */
18
19#define dprintk(fmt, args...) do{}while(0)
20
21
22static int get_name(const struct path *path, char *name, struct dentry *child);
23
24
25static int exportfs_get_name(struct vfsmount *mnt, struct dentry *dir,

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294 if (!dir->i_fop)
295 goto out;
296 /*
297 * inode->i_ino is unsigned long, kstat->ino is u64, so the
298 * former would be insufficient on 32-bit hosts when the
299 * filesystem supports 64-bit inode numbers. So we need to
300 * actually call ->getattr, not just read i_ino:
301 */
303 error = vfs_getattr_nosec(&child_path, &stat);
302 error = vfs_getattr_nosec(&child_path, &stat,
303 STATX_INO, AT_STATX_SYNC_AS_STAT);
304 if (error)
305 return error;
306 buffer.ino = stat.ino;
307 /*
308 * Open the directory ...
309 */
310 file = dentry_open(path, O_RDONLY, cred);
311 error = PTR_ERR(file);

--- 240 unchanged lines hidden --- 		304 if (error)
305 return error;
306 buffer.ino = stat.ino;
307 /*
308 * Open the directory ...
309 */
310 file = dentry_open(path, O_RDONLY, cred);
311 error = PTR_ERR(file);

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