static void test_nfsfh(void){
dev_t dev=0;
u32 unfs=0, u32ptr[2];
ino_t ino=0;
struct svc_fh A1;
int i=20;
u32_to_dev_t((__u32)unfs);
ino_t_to_u32(ino);
u32_to_ino_t((__u32)unfs);
mk_fsid_v0(u32ptr, dev, ino);
mk_fsid_v1(u32ptr, unfs);
SVCFH_fmt(&A1);
fh_init(&A1,i);
fh_lock(&A1);
fh_unlock(&A1);
printk("finished nfsfh test\n");
}
int
fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry, struct svc_fh *ref_fh)
{
/* ref_fh is a reference file handle.
* if it is non-null, then we should compose a filehandle which is
* of the same version, where possible.
* Currently, that means that if ref_fh->fh_handle.fh_version == 0xca
* Then create a 32byte filehandle using nfs_fhbase_old
*
*/
u8 ref_fh_version = 0;
u8 ref_fh_fsid_type = 0;
struct inode * inode = dentry->d_inode;
struct dentry *parent = dentry->d_parent;
__u32 *datap;
dev_t ex_dev = exp->ex_dentry->d_inode->i_sb->s_dev;
dprintk("nfsd: fh_compose(exp %02x:%02x/%ld %s/%s, ino=%ld)\n",
MAJOR(ex_dev), MINOR(ex_dev),
(long) exp->ex_dentry->d_inode->i_ino,
parent->d_name.name, dentry->d_name.name,
(inode ? inode->i_ino : 0));
if (ref_fh) {
ref_fh_version = ref_fh->fh_handle.fh_version;
if (ref_fh_version == 0xca)
ref_fh_fsid_type = 0;
else
ref_fh_fsid_type = ref_fh->fh_handle.fh_fsid_type;
if (ref_fh_fsid_type > 3)
ref_fh_fsid_type = 0;
}
/* make sure ref_fh type works for given export */
if (ref_fh_fsid_type == 1 &&
!(exp->ex_flags & NFSEXP_FSID)) {
/* if we don't have an fsid, we cannot provide one... */
ref_fh_fsid_type = 0;
}
if (!old_valid_dev(ex_dev) && ref_fh_fsid_type == 0) {
/* for newer device numbers, we must use a newer fsid format */
ref_fh_version = 1;
ref_fh_fsid_type = 3;
}
if (old_valid_dev(ex_dev) &&
(ref_fh_fsid_type == 2 || ref_fh_fsid_type == 3))
/* must use type1 for smaller device numbers */
ref_fh_fsid_type = 0;
if (ref_fh == fhp)
fh_put(ref_fh);
if (fhp->fh_locked || fhp->fh_dentry) {
printk(KERN_ERR "fh_compose: fh %s/%s not initialized!\n",
parent->d_name.name, dentry->d_name.name);
}
if (fhp->fh_maxsize < NFS_FHSIZE)
printk(KERN_ERR "fh_compose: called with maxsize %d! %s/%s\n",
fhp->fh_maxsize, parent->d_name.name, dentry->d_name.name);
fhp->fh_dentry = dget(dentry); /* our internal copy */
fhp->fh_export = exp;
cache_get(&exp->h);
if (ref_fh_version == 0xca) {
/* old style filehandle please */
memset(&fhp->fh_handle.fh_base, 0, NFS_FHSIZE);
fhp->fh_handle.fh_size = NFS_FHSIZE;
fhp->fh_handle.ofh_dcookie = 0xfeebbaca;
fhp->fh_handle.ofh_dev = old_encode_dev(ex_dev);
fhp->fh_handle.ofh_xdev = fhp->fh_handle.ofh_dev;
fhp->fh_handle.ofh_xino = ino_t_to_u32(exp->ex_dentry->d_inode->i_ino);
fhp->fh_handle.ofh_dirino = ino_t_to_u32(parent_ino(dentry));
if (inode)
_fh_update_old(dentry, exp, &fhp->fh_handle);
} else {
int len;
fhp->fh_handle.fh_version = 1;
fhp->fh_handle.fh_auth_type = 0;
datap = fhp->fh_handle.fh_auth+0;
fhp->fh_handle.fh_fsid_type = ref_fh_fsid_type;
switch (ref_fh_fsid_type) {
case 0:
/*
* fsid_type 0:
* 2byte major, 2byte minor, 4byte inode
*/
mk_fsid_v0(datap, ex_dev,
exp->ex_dentry->d_inode->i_ino);
break;
case 1:
/* fsid_type 1 == 4 bytes filesystem id */
mk_fsid_v1(datap, exp->ex_fsid);
break;
case 2:
/*
* fsid_type 2:
* 4byte major, 4byte minor, 4byte inode
*/
mk_fsid_v2(datap, ex_dev,
exp->ex_dentry->d_inode->i_ino);
break;
case 3:
/*
* fsid_type 3:
* 4byte devicenumber, 4byte inode
*/
mk_fsid_v3(datap, ex_dev,
exp->ex_dentry->d_inode->i_ino);
break;
}
len = key_len(ref_fh_fsid_type);
datap += len/4;
fhp->fh_handle.fh_size = 4 + len;
if (inode) {
int size = (fhp->fh_maxsize-len-4)/4;
fhp->fh_handle.fh_fileid_type =
_fh_update(dentry, exp, datap, &size);
fhp->fh_handle.fh_size += size*4;
}
if (fhp->fh_handle.fh_fileid_type == 255)
return nfserr_opnotsupp;
}
nfsd_nr_verified++;
return 0;
}
