Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * symlink.c |
| 3 | * |
| 4 | * Copyright (C) 2002 by John Newbigin |
| 5 | * |
| 6 | * Please add a note about your changes to smbfs in the ChangeLog file. |
| 7 | */ |
| 8 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #include <linux/kernel.h> |
| 10 | #include <linux/errno.h> |
| 11 | #include <linux/fcntl.h> |
| 12 | #include <linux/stat.h> |
| 13 | #include <linux/mm.h> |
| 14 | #include <linux/slab.h> |
| 15 | #include <linux/pagemap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/net.h> |
| 17 | #include <linux/namei.h> |
| 18 | |
| 19 | #include <asm/uaccess.h> |
| 20 | #include <asm/system.h> |
| 21 | |
Arnd Bergmann | 2116b7a | 2010-10-04 22:55:57 +0200 | [diff] [blame] | 22 | #include "smbno.h" |
| 23 | #include "smb_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "smb_debug.h" |
| 25 | #include "proto.h" |
| 26 | |
| 27 | int smb_symlink(struct inode *inode, struct dentry *dentry, const char *oldname) |
| 28 | { |
| 29 | DEBUG1("create symlink %s -> %s/%s\n", oldname, DENTRY_PATH(dentry)); |
| 30 | |
| 31 | return smb_proc_symlink(server_from_dentry(dentry), dentry, oldname); |
| 32 | } |
| 33 | |
Al Viro | 008b150 | 2005-08-20 00:17:39 +0100 | [diff] [blame] | 34 | static void *smb_follow_link(struct dentry *dentry, struct nameidata *nd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | { |
| 36 | char *link = __getname(); |
| 37 | DEBUG1("followlink of %s/%s\n", DENTRY_PATH(dentry)); |
| 38 | |
| 39 | if (!link) { |
| 40 | link = ERR_PTR(-ENOMEM); |
| 41 | } else { |
| 42 | int len = smb_proc_read_link(server_from_dentry(dentry), |
| 43 | dentry, link, PATH_MAX - 1); |
| 44 | if (len < 0) { |
Davi Arnaut | 53b2758 | 2005-11-07 00:59:37 -0800 | [diff] [blame] | 45 | __putname(link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | link = ERR_PTR(len); |
| 47 | } else { |
| 48 | link[len] = 0; |
| 49 | } |
| 50 | } |
| 51 | nd_set_link(nd, link); |
Al Viro | 008b150 | 2005-08-20 00:17:39 +0100 | [diff] [blame] | 52 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | } |
| 54 | |
Al Viro | 008b150 | 2005-08-20 00:17:39 +0100 | [diff] [blame] | 55 | static void smb_put_link(struct dentry *dentry, struct nameidata *nd, void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | { |
| 57 | char *s = nd_get_link(nd); |
| 58 | if (!IS_ERR(s)) |
Davi Arnaut | 53b2758 | 2005-11-07 00:59:37 -0800 | [diff] [blame] | 59 | __putname(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | } |
| 61 | |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 62 | const struct inode_operations smb_link_inode_operations = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | { |
| 64 | .readlink = generic_readlink, |
| 65 | .follow_link = smb_follow_link, |
| 66 | .put_link = smb_put_link, |
| 67 | }; |