diff options
Diffstat (limited to 'module/zfs/zpl_export.c')
| -rw-r--r-- | module/zfs/zpl_export.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/module/zfs/zpl_export.c b/module/zfs/zpl_export.c deleted file mode 100644 index a264d664c..000000000 --- a/module/zfs/zpl_export.c +++ /dev/null @@ -1,177 +0,0 @@ -/* - * CDDL HEADER START - * - * The contents of this file are subject to the terms of the - * Common Development and Distribution License (the "License"). - * You may not use this file except in compliance with the License. - * - * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE - * or http://www.opensolaris.org/os/licensing. - * See the License for the specific language governing permissions - * and limitations under the License. - * - * When distributing Covered Code, include this CDDL HEADER in each - * file and include the License file at usr/src/OPENSOLARIS.LICENSE. - * If applicable, add the following below this CDDL HEADER, with the - * fields enclosed by brackets "[]" replaced with your own identifying - * information: Portions Copyright [yyyy] [name of copyright owner] - * - * CDDL HEADER END - */ -/* - * Copyright (c) 2011 Gunnar Beutner - * Copyright (c) 2012 Cyril Plisko. All rights reserved. - */ - - -#include <sys/zfs_vnops.h> -#include <sys/zfs_znode.h> -#include <sys/zfs_ctldir.h> -#include <sys/zpl.h> - - -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) -{ - /* CSTYLED */ - 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) { - iput(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 struct dentry * -zpl_get_parent(struct dentry *child) -{ - cred_t *cr = CRED(); - fstrans_cookie_t cookie; - struct inode *ip; - int error; - - crhold(cr); - cookie = spl_fstrans_mark(); - error = -zfs_lookup(child->d_inode, "..", &ip, 0, cr, NULL, NULL); - spl_fstrans_unmark(cookie); - crfree(cr); - ASSERT3S(error, <=, 0); - - if (error) - return (ERR_PTR(error)); - - return (zpl_dentry_obtain_alias(ip)); -} - -#ifdef HAVE_COMMIT_METADATA -static int -zpl_commit_metadata(struct inode *inode) -{ - cred_t *cr = CRED(); - fstrans_cookie_t cookie; - int error; - - if (zfsctl_is_node(inode)) - return (0); - - crhold(cr); - cookie = spl_fstrans_mark(); - error = -zfs_fsync(inode, 0, cr); - spl_fstrans_unmark(cookie); - crfree(cr); - ASSERT3S(error, <=, 0); - - return (error); -} -#endif /* HAVE_COMMIT_METADATA */ - -const struct export_operations zpl_export_operations = { - .encode_fh = zpl_encode_fh, - .fh_to_dentry = zpl_fh_to_dentry, - .get_parent = zpl_get_parent, -#ifdef HAVE_COMMIT_METADATA - .commit_metadata = zpl_commit_metadata, -#endif /* HAVE_COMMIT_METADATA */ -}; |