static int *xdr_decode_entry(int *p, struct nfs_entry *entry)
{
entry->fileid = ntohl(*p++);
if (!(p = xdr_decode_string(p, entry->name, NFS_MAXNAMLEN)))
return NULL;
entry->cookie = ntohl(*p++);
entry->eof = 0;
return p;
}
static inline u32 *
decode_pathname(u32 *p, char **namp, int *lenp)
{
char *name;
int i;
if ((p = xdr_decode_string(p, namp, lenp, NFS3_MAXPATHLEN)) != NULL) {
for (i = 0, name = *namp; i < *lenp; i++, name++) {
if (*name == '\0')
return NULL;
}
}
return p;
}
/*
* Decode a file name and make sure that the path contains
* no slashes or null bytes.
*/
static inline u32 *
decode_filename(u32 *p, char **namp, int *lenp)
{
char *name;
int i;
if ((p = xdr_decode_string(p, namp, lenp, NFS_MAXNAMLEN)) != NULL) {
for (i = 0, name = *namp; i < *lenp; i++, name++) {
if (*name == '\0' || *name == '/')
return NULL;
}
*name = '\0';
}
return p;
}
int nfs_proc_readlink(struct nfs_server *server, struct nfs_fh *fhandle,
char *res)
{
int *p, *p0;
int status;
int ruid = 0;
PRINTK("NFS call readlink\n");
if (!(p0 = nfs_rpc_alloc()))
return -EIO;
retry:
p = nfs_rpc_header(p0, NFSPROC_READLINK, ruid);
p = xdr_encode_fhandle(p, fhandle);
if ((status = nfs_rpc_call(server, p0, p)) < 0) {
nfs_rpc_free(p0);
return status;
}
if (!(p = nfs_rpc_verify(p0)))
status = NFSERR_IO;
else if ((status = ntohl(*p++)) == NFS_OK) {
if (!(p = xdr_decode_string(p, res, NFS_MAXPATHLEN))) {
printk("nfs_proc_readlink: giant pathname\n");
status = NFSERR_IO;
}
else
PRINTK("NFS reply readlink %s\n", res);
}
else {
if (!ruid && current->euid == 0 && current->uid != 0) {
ruid = 1;
goto retry;
}
PRINTK("NFS reply readlink failed = %d\n", status);
}
nfs_rpc_free(p0);
return -nfs_stat_to_errno(status);
}