static int
zpl_encode_fh(struct dentry *dentry, __u32 *fh, int *max_len, int connectable)
{
fid_t *fid = (fid_t *)fh;
struct inode *ip = dentry->d_inode;
int len_bytes, rc;
len_bytes = *max_len * sizeof (__u32);
if (len_bytes < offsetof(fid_t, fid_data))
return 255;
fid->fid_len = len_bytes - offsetof(fid_t, fid_data);
rc = zfs_fid(ip, fid);
len_bytes = offsetof(fid_t, fid_data) + fid->fid_len;
*max_len = roundup(len_bytes, sizeof (__u32)) / sizeof (__u32);
return (rc == 0 ? FILEID_INO32_GEN : 255);
}
static int lzfs_encode_fh(struct dentry *dentry, u32 *fh, int *max_len, int connectable)
{
lzfs_fid_t *lzfid = (lzfs_fid_t *)fh;
struct inode *inode = dentry->d_inode;
int lfid_type = LZFS_FILEID_INO64_GEN;
vnode_t *vp;
int error = 0;
SENTRY;
lzfid->fid_len = *max_len;
if (!(S_ISDIR(inode->i_mode) || !connectable)) {
spin_lock(&dentry->d_lock);
inode = dentry->d_parent->d_inode;
spin_unlock(&dentry->d_lock);
lfid_type = LZFS_FILEID_INO64_GEN_PARENT;
}
/* If inode number is -1 then we looking into .zfs(ZFS control
* directory). Traversing .zfs from the NFS is not supported yet.
*/
if (inode->i_ino == -1) {
return 255;
}
vp = LZFS_ITOV(inode);
error = zfs_fid( vp, lzfid, 0);
tsd_exit();
SEXIT;
if (error) {
printk(KERN_WARNING "Unable to get file handle \n");
return 255;
}
*max_len = lzfid->fid_len;
return lfid_type;
}
static int
#ifdef HAVE_ENCODE_FH_WITH_INODE
zpl_encode_fh(struct inode *ip, __u32 *fh, int *max_len, struct inode *parent)
{
#else
zpl_encode_fh(struct dentry *dentry, __u32 *fh, int *max_len, int connectable)
{
struct inode *ip = dentry->d_inode;
#endif /* HAVE_ENCODE_FH_WITH_INODE */
fstrans_cookie_t cookie;
fid_t *fid = (fid_t *)fh;
int len_bytes, rc;
len_bytes = *max_len * sizeof (__u32);
if (len_bytes < offsetof(fid_t, fid_data))
return (255);
fid->fid_len = len_bytes - offsetof(fid_t, fid_data);
cookie = spl_fstrans_mark();
if (zfsctl_is_node(ip))
rc = zfsctl_fid(ip, fid);
else
rc = zfs_fid(ip, fid);
spl_fstrans_unmark(cookie);
len_bytes = offsetof(fid_t, fid_data) + fid->fid_len;
*max_len = roundup(len_bytes, sizeof (__u32)) / sizeof (__u32);
return (rc == 0 ? FILEID_INO32_GEN : 255);
}
static struct dentry *
zpl_dentry_obtain_alias(struct inode *ip)
{
struct dentry *result;
#ifdef HAVE_D_OBTAIN_ALIAS
result = d_obtain_alias(ip);
#else
result = d_alloc_anon(ip);
if (result == NULL) {
VN_RELE(ip);
result = ERR_PTR(-ENOMEM);
}
#endif /* HAVE_D_OBTAIN_ALIAS */
return (result);
}
static struct dentry *
zpl_fh_to_dentry(struct super_block *sb, struct fid *fh,
int fh_len, int fh_type)
{
fid_t *fid = (fid_t *)fh;
fstrans_cookie_t cookie;
struct inode *ip;
int len_bytes, rc;
len_bytes = fh_len * sizeof (__u32);
if (fh_type != FILEID_INO32_GEN ||
len_bytes < offsetof(fid_t, fid_data) ||
len_bytes < offsetof(fid_t, fid_data) + fid->fid_len)
return (ERR_PTR(-EINVAL));
cookie = spl_fstrans_mark();
rc = zfs_vget(sb, &ip, fid);
spl_fstrans_unmark(cookie);
if (rc) {
/*
* If we see ENOENT it might mean that an NFSv4 * client
* is using a cached inode value in a file handle and
* that the sought after file has had its inode changed
* by a third party. So change the error to ESTALE
* which will trigger a full lookup by the client and
* will find the new filename/inode pair if it still
* exists.
*/
if (rc == ENOENT)
rc = ESTALE;
return (ERR_PTR(-rc));
}
ASSERT((ip != NULL) && !IS_ERR(ip));
return (zpl_dentry_obtain_alias(ip));
}
static int
#ifdef HAVE_ENCODE_FH_WITH_INODE
zpl_encode_fh(struct inode *ip, __u32 *fh, int *max_len, struct inode *parent)
{
#else
zpl_encode_fh(struct dentry *dentry, __u32 *fh, int *max_len, int connectable)
{
struct inode *ip = dentry->d_inode;
#endif /* HAVE_ENCODE_FH_WITH_INODE */
fid_t *fid = (fid_t *)fh;
int len_bytes, rc;
len_bytes = *max_len * sizeof (__u32);
if (len_bytes < offsetof(fid_t, fid_data))
return (255);
fid->fid_len = len_bytes - offsetof(fid_t, fid_data);
if (zfsctl_is_node(ip))
rc = zfsctl_fid(ip, fid);
else
rc = zfs_fid(ip, fid);
len_bytes = offsetof(fid_t, fid_data) + fid->fid_len;
*max_len = roundup(len_bytes, sizeof (__u32)) / sizeof (__u32);
return (rc == 0 ? FILEID_INO32_GEN : 255);
}
static struct dentry *
zpl_dentry_obtain_alias(struct inode *ip)
{
struct dentry *result;
#ifdef HAVE_D_OBTAIN_ALIAS
result = d_obtain_alias(ip);
#else
result = d_alloc_anon(ip);
if (result == NULL) {
VN_RELE(ip);
result = ERR_PTR(-ENOMEM);
}
#endif /* HAVE_D_OBTAIN_ALIAS */
return (result);
}
static struct dentry *
zpl_fh_to_dentry(struct super_block *sb, struct fid *fh,
int fh_len, int fh_type)
{
fid_t *fid = (fid_t *)fh;
struct inode *ip;
int len_bytes, rc;
len_bytes = fh_len * sizeof (__u32);
if (fh_type != FILEID_INO32_GEN ||
len_bytes < offsetof(fid_t, fid_data) ||
len_bytes < offsetof(fid_t, fid_data) + fid->fid_len)
return (ERR_PTR(-EINVAL));
rc = zfs_vget(sb, &ip, fid);
if (rc != 0)
return (ERR_PTR(-rc));
ASSERT((ip != NULL) && !IS_ERR(ip));
return (zpl_dentry_obtain_alias(ip));
}
