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[CIFS] remove redundant path walking in dfs_do_refmount 

Reviewed-by: Dave Howells <dhowells@redhat.com>
Signed-off-by: Igor Mammedov <niallain@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French 2010-07-26 18:20:16 +00:00
parent f636a34802
commit f67909cf80
1 changed files with 11 additions and 17 deletions
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28
fs/cifs/cifs_dfs_ref.c
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@ -230,28 +230,22 @@ char *cifs_compose_mount_options(const char *sb_mountdata,
goto compose_mount_options_out;
}
static struct vfsmount *cifs_dfs_do_refmount(const struct vfsmount *mnt_parent,
struct dentry *dentry, const struct dfs_info3_param *ref)
/**
* cifs_dfs_do_refmount - mounts specified path using provided refferal
* @cifs_sb: parent/root superblock
* @fullpath: full path in UNC format
* @ref: server's referral
*/
static struct vfsmount *cifs_dfs_do_refmount(struct cifs_sb_info *cifs_sb,
const char *fullpath, const struct dfs_info3_param *ref)
{
struct cifs_sb_info *cifs_sb;
struct vfsmount *mnt;
char *mountdata;
char *devname = NULL;
char *fullpath;
cifs_sb = CIFS_SB(dentry->d_inode->i_sb);
/*
* this function gives us a path with a double backslash prefix. We
* require a single backslash for DFS.
*/
fullpath = build_path_from_dentry(dentry);
if (!fullpath)
return ERR_PTR(-ENOMEM);
/* strip first '\' from fullpath */
mountdata = cifs_compose_mount_options(cifs_sb->mountdata,
fullpath + 1, ref, &devname);
kfree(fullpath);
if (IS_ERR(mountdata))
return (struct vfsmount *)mountdata;
@ -357,8 +351,8 @@ cifs_dfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd)
rc = -EINVAL;
goto out_err;
}
mnt = cifs_dfs_do_refmount(nd->path.mnt,
nd->path.dentry, referrals + i);
mnt = cifs_dfs_do_refmount(cifs_sb,
full_path, referrals + i);
cFYI(1, "%s: cifs_dfs_do_refmount:%s , mnt:%p", __func__,
referrals[i].node_name, mnt);