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Diffstat (limited to 'fs/xfs/linux-2.6/xfs_export.c')
-rw-r--r--fs/xfs/linux-2.6/xfs_export.c237
1 files changed, 0 insertions, 237 deletions
diff --git a/fs/xfs/linux-2.6/xfs_export.c b/fs/xfs/linux-2.6/xfs_export.c
deleted file mode 100644
index ca4f66c4de1..00000000000
--- a/fs/xfs/linux-2.6/xfs_export.c
+++ /dev/null
@@ -1,237 +0,0 @@
-/*
- * Copyright (c) 2004-2005 Silicon Graphics, Inc.
- * All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-#include "xfs.h"
-#include "xfs_types.h"
-#include "xfs_inum.h"
-#include "xfs_log.h"
-#include "xfs_trans.h"
-#include "xfs_sb.h"
-#include "xfs_ag.h"
-#include "xfs_dmapi.h"
-#include "xfs_mount.h"
-#include "xfs_export.h"
-#include "xfs_vnodeops.h"
-#include "xfs_bmap_btree.h"
-#include "xfs_inode.h"
-#include "xfs_vfsops.h"
-
-static struct dentry dotdot = { .d_name.name = "..", .d_name.len = 2, };
-
-/*
- * Note that we only accept fileids which are long enough rather than allow
- * the parent generation number to default to zero. XFS considers zero a
- * valid generation number not an invalid/wildcard value.
- */
-static int xfs_fileid_length(int fileid_type)
-{
- switch (fileid_type) {
- case FILEID_INO32_GEN:
- return 2;
- case FILEID_INO32_GEN_PARENT:
- return 4;
- case FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG:
- return 3;
- case FILEID_INO32_GEN_PARENT | XFS_FILEID_TYPE_64FLAG:
- return 6;
- }
- return 255; /* invalid */
-}
-
-STATIC int
-xfs_fs_encode_fh(
- struct dentry *dentry,
- __u32 *fh,
- int *max_len,
- int connectable)
-{
- struct fid *fid = (struct fid *)fh;
- struct xfs_fid64 *fid64 = (struct xfs_fid64 *)fh;
- struct inode *inode = dentry->d_inode;
- int fileid_type;
- int len;
-
- /* Directories don't need their parent encoded, they have ".." */
- if (S_ISDIR(inode->i_mode))
- fileid_type = FILEID_INO32_GEN;
- else
- fileid_type = FILEID_INO32_GEN_PARENT;
-
- /* filesystem may contain 64bit inode numbers */
- if (!(XFS_M(inode->i_sb)->m_flags & XFS_MOUNT_SMALL_INUMS))
- fileid_type |= XFS_FILEID_TYPE_64FLAG;
-
- /*
- * Only encode if there is enough space given. In practice
- * this means we can't export a filesystem with 64bit inodes
- * over NFSv2 with the subtree_check export option; the other
- * seven combinations work. The real answer is "don't use v2".
- */
- len = xfs_fileid_length(fileid_type);
- if (*max_len < len)
- return 255;
- *max_len = len;
-
- switch (fileid_type) {
- case FILEID_INO32_GEN_PARENT:
- spin_lock(&dentry->d_lock);
- fid->i32.parent_ino = dentry->d_parent->d_inode->i_ino;
- fid->i32.parent_gen = dentry->d_parent->d_inode->i_generation;
- spin_unlock(&dentry->d_lock);
- /*FALLTHRU*/
- case FILEID_INO32_GEN:
- fid->i32.ino = inode->i_ino;
- fid->i32.gen = inode->i_generation;
- break;
- case FILEID_INO32_GEN_PARENT | XFS_FILEID_TYPE_64FLAG:
- spin_lock(&dentry->d_lock);
- fid64->parent_ino = dentry->d_parent->d_inode->i_ino;
- fid64->parent_gen = dentry->d_parent->d_inode->i_generation;
- spin_unlock(&dentry->d_lock);
- /*FALLTHRU*/
- case FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG:
- fid64->ino = inode->i_ino;
- fid64->gen = inode->i_generation;
- break;
- }
-
- return fileid_type;
-}
-
-STATIC struct inode *
-xfs_nfs_get_inode(
- struct super_block *sb,
- u64 ino,
- u32 generation)
- {
- xfs_mount_t *mp = XFS_M(sb);
- xfs_inode_t *ip;
- int error;
-
- /*
- * NFS can sometimes send requests for ino 0. Fail them gracefully.
- */
- if (ino == 0)
- return ERR_PTR(-ESTALE);
-
- error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
- if (error)
- return ERR_PTR(-error);
- if (!ip)
- return ERR_PTR(-EIO);
-
- if (!ip->i_d.di_mode || ip->i_d.di_gen != generation) {
- xfs_iput_new(ip, XFS_ILOCK_SHARED);
- return ERR_PTR(-ENOENT);
- }
-
- xfs_iunlock(ip, XFS_ILOCK_SHARED);
- return ip->i_vnode;
-}
-
-STATIC struct dentry *
-xfs_fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
- int fh_len, int fileid_type)
-{
- struct xfs_fid64 *fid64 = (struct xfs_fid64 *)fid;
- struct inode *inode = NULL;
- struct dentry *result;
-
- if (fh_len < xfs_fileid_length(fileid_type))
- return NULL;
-
- switch (fileid_type) {
- case FILEID_INO32_GEN_PARENT:
- case FILEID_INO32_GEN:
- inode = xfs_nfs_get_inode(sb, fid->i32.ino, fid->i32.gen);
- break;
- case FILEID_INO32_GEN_PARENT | XFS_FILEID_TYPE_64FLAG:
- case FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG:
- inode = xfs_nfs_get_inode(sb, fid64->ino, fid64->gen);
- break;
- }
-
- if (!inode)
- return NULL;
- if (IS_ERR(inode))
- return ERR_PTR(PTR_ERR(inode));
- result = d_alloc_anon(inode);
- if (!result) {
- iput(inode);
- return ERR_PTR(-ENOMEM);
- }
- return result;
-}
-
-STATIC struct dentry *
-xfs_fs_fh_to_parent(struct super_block *sb, struct fid *fid,
- int fh_len, int fileid_type)
-{
- struct xfs_fid64 *fid64 = (struct xfs_fid64 *)fid;
- struct inode *inode = NULL;
- struct dentry *result;
-
- switch (fileid_type) {
- case FILEID_INO32_GEN_PARENT:
- inode = xfs_nfs_get_inode(sb, fid->i32.parent_ino,
- fid->i32.parent_gen);
- break;
- case FILEID_INO32_GEN_PARENT | XFS_FILEID_TYPE_64FLAG:
- inode = xfs_nfs_get_inode(sb, fid64->parent_ino,
- fid64->parent_gen);
- break;
- }
-
- if (!inode)
- return NULL;
- if (IS_ERR(inode))
- return ERR_PTR(PTR_ERR(inode));
- result = d_alloc_anon(inode);
- if (!result) {
- iput(inode);
- return ERR_PTR(-ENOMEM);
- }
- return result;
-}
-
-STATIC struct dentry *
-xfs_fs_get_parent(
- struct dentry *child)
-{
- int error;
- bhv_vnode_t *cvp;
- struct dentry *parent;
-
- cvp = NULL;
- error = xfs_lookup(XFS_I(child->d_inode), &dotdot, &cvp);
- if (unlikely(error))
- return ERR_PTR(-error);
-
- parent = d_alloc_anon(vn_to_inode(cvp));
- if (unlikely(!parent)) {
- VN_RELE(cvp);
- return ERR_PTR(-ENOMEM);
- }
- return parent;
-}
-
-const struct export_operations xfs_export_operations = {
- .encode_fh = xfs_fs_encode_fh,
- .fh_to_dentry = xfs_fs_fh_to_dentry,
- .fh_to_parent = xfs_fs_fh_to_parent,
- .get_parent = xfs_fs_get_parent,
-};
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