mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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53b27584db
Data allocated with "__getname()" should always be free'd with "__putname()" because of the AUDITSYSCALL code. Signed-off-by: Davi Arnaut <davi.arnaut@gmail.com> Cc: Urban Widmark <urban@teststation.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
/*
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* symlink.c
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*
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* Copyright (C) 2002 by John Newbigin
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*
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* Please add a note about your changes to smbfs in the ChangeLog file.
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*/
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/fcntl.h>
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#include <linux/stat.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/pagemap.h>
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#include <linux/smp_lock.h>
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#include <linux/net.h>
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#include <linux/namei.h>
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#include <asm/uaccess.h>
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#include <asm/system.h>
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#include <linux/smbno.h>
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#include <linux/smb_fs.h>
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#include "smb_debug.h"
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#include "proto.h"
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int smb_symlink(struct inode *inode, struct dentry *dentry, const char *oldname)
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{
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DEBUG1("create symlink %s -> %s/%s\n", oldname, DENTRY_PATH(dentry));
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return smb_proc_symlink(server_from_dentry(dentry), dentry, oldname);
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}
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static void *smb_follow_link(struct dentry *dentry, struct nameidata *nd)
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{
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char *link = __getname();
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DEBUG1("followlink of %s/%s\n", DENTRY_PATH(dentry));
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if (!link) {
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link = ERR_PTR(-ENOMEM);
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} else {
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int len = smb_proc_read_link(server_from_dentry(dentry),
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dentry, link, PATH_MAX - 1);
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if (len < 0) {
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__putname(link);
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link = ERR_PTR(len);
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} else {
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link[len] = 0;
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}
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}
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nd_set_link(nd, link);
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return NULL;
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}
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static void smb_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
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{
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char *s = nd_get_link(nd);
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if (!IS_ERR(s))
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__putname(s);
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}
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struct inode_operations smb_link_inode_operations =
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{
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.readlink = generic_readlink,
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.follow_link = smb_follow_link,
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.put_link = smb_put_link,
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};
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