summaryrefslogtreecommitdiff
path: root/ANDROID_3.4.5/fs/ocfs2/export.c
diff options
context:
space:
mode:
Diffstat (limited to 'ANDROID_3.4.5/fs/ocfs2/export.c')
-rw-r--r--ANDROID_3.4.5/fs/ocfs2/export.c276
1 files changed, 0 insertions, 276 deletions
diff --git a/ANDROID_3.4.5/fs/ocfs2/export.c b/ANDROID_3.4.5/fs/ocfs2/export.c
deleted file mode 100644
index 745db425..00000000
--- a/ANDROID_3.4.5/fs/ocfs2/export.c
+++ /dev/null
@@ -1,276 +0,0 @@
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
- * export.c
- *
- * Functions to facilitate NFS exporting
- *
- * Copyright (C) 2002, 2005 Oracle. 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; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will 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 to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- */
-
-#include <linux/fs.h>
-#include <linux/types.h>
-
-#include <cluster/masklog.h>
-
-#include "ocfs2.h"
-
-#include "alloc.h"
-#include "dir.h"
-#include "dlmglue.h"
-#include "dcache.h"
-#include "export.h"
-#include "inode.h"
-
-#include "buffer_head_io.h"
-#include "suballoc.h"
-#include "ocfs2_trace.h"
-
-struct ocfs2_inode_handle
-{
- u64 ih_blkno;
- u32 ih_generation;
-};
-
-static struct dentry *ocfs2_get_dentry(struct super_block *sb,
- struct ocfs2_inode_handle *handle)
-{
- struct inode *inode;
- struct ocfs2_super *osb = OCFS2_SB(sb);
- u64 blkno = handle->ih_blkno;
- int status, set;
- struct dentry *result;
-
- trace_ocfs2_get_dentry_begin(sb, handle, (unsigned long long)blkno);
-
- if (blkno == 0) {
- result = ERR_PTR(-ESTALE);
- goto bail;
- }
-
- inode = ocfs2_ilookup(sb, blkno);
- /*
- * If the inode exists in memory, we only need to check it's
- * generation number
- */
- if (inode)
- goto check_gen;
-
- /*
- * This will synchronize us against ocfs2_delete_inode() on
- * all nodes
- */
- status = ocfs2_nfs_sync_lock(osb, 1);
- if (status < 0) {
- mlog(ML_ERROR, "getting nfs sync lock(EX) failed %d\n", status);
- goto check_err;
- }
-
- status = ocfs2_test_inode_bit(osb, blkno, &set);
- trace_ocfs2_get_dentry_test_bit(status, set);
- if (status < 0) {
- if (status == -EINVAL) {
- /*
- * The blkno NFS gave us doesn't even show up
- * as an inode, we return -ESTALE to be
- * nice
- */
- status = -ESTALE;
- } else
- mlog(ML_ERROR, "test inode bit failed %d\n", status);
- goto unlock_nfs_sync;
- }
-
- /* If the inode allocator bit is clear, this inode must be stale */
- if (!set) {
- status = -ESTALE;
- goto unlock_nfs_sync;
- }
-
- inode = ocfs2_iget(osb, blkno, 0, 0);
-
-unlock_nfs_sync:
- ocfs2_nfs_sync_unlock(osb, 1);
-
-check_err:
- if (status < 0) {
- if (status == -ESTALE) {
- trace_ocfs2_get_dentry_stale((unsigned long long)blkno,
- handle->ih_generation);
- }
- result = ERR_PTR(status);
- goto bail;
- }
-
- if (IS_ERR(inode)) {
- mlog_errno(PTR_ERR(inode));
- result = (void *)inode;
- goto bail;
- }
-
-check_gen:
- if (handle->ih_generation != inode->i_generation) {
- iput(inode);
- trace_ocfs2_get_dentry_generation((unsigned long long)blkno,
- handle->ih_generation,
- inode->i_generation);
- result = ERR_PTR(-ESTALE);
- goto bail;
- }
-
- result = d_obtain_alias(inode);
- if (IS_ERR(result))
- mlog_errno(PTR_ERR(result));
-
-bail:
- trace_ocfs2_get_dentry_end(result);
- return result;
-}
-
-static struct dentry *ocfs2_get_parent(struct dentry *child)
-{
- int status;
- u64 blkno;
- struct dentry *parent;
- struct inode *dir = child->d_inode;
-
- trace_ocfs2_get_parent(child, child->d_name.len, child->d_name.name,
- (unsigned long long)OCFS2_I(dir)->ip_blkno);
-
- status = ocfs2_inode_lock(dir, NULL, 0);
- if (status < 0) {
- if (status != -ENOENT)
- mlog_errno(status);
- parent = ERR_PTR(status);
- goto bail;
- }
-
- status = ocfs2_lookup_ino_from_name(dir, "..", 2, &blkno);
- if (status < 0) {
- parent = ERR_PTR(-ENOENT);
- goto bail_unlock;
- }
-
- parent = d_obtain_alias(ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0));
-
-bail_unlock:
- ocfs2_inode_unlock(dir, 0);
-
-bail:
- trace_ocfs2_get_parent_end(parent);
-
- return parent;
-}
-
-static int ocfs2_encode_fh(struct dentry *dentry, u32 *fh_in, int *max_len,
- int connectable)
-{
- struct inode *inode = dentry->d_inode;
- int len = *max_len;
- int type = 1;
- u64 blkno;
- u32 generation;
- __le32 *fh = (__force __le32 *) fh_in;
-
- trace_ocfs2_encode_fh_begin(dentry, dentry->d_name.len,
- dentry->d_name.name,
- fh, len, connectable);
-
- if (connectable && (len < 6)) {
- *max_len = 6;
- type = 255;
- goto bail;
- } else if (len < 3) {
- *max_len = 3;
- type = 255;
- goto bail;
- }
-
- blkno = OCFS2_I(inode)->ip_blkno;
- generation = inode->i_generation;
-
- trace_ocfs2_encode_fh_self((unsigned long long)blkno, generation);
-
- len = 3;
- fh[0] = cpu_to_le32((u32)(blkno >> 32));
- fh[1] = cpu_to_le32((u32)(blkno & 0xffffffff));
- fh[2] = cpu_to_le32(generation);
-
- if (connectable && !S_ISDIR(inode->i_mode)) {
- struct inode *parent;
-
- spin_lock(&dentry->d_lock);
-
- parent = dentry->d_parent->d_inode;
- blkno = OCFS2_I(parent)->ip_blkno;
- generation = parent->i_generation;
-
- fh[3] = cpu_to_le32((u32)(blkno >> 32));
- fh[4] = cpu_to_le32((u32)(blkno & 0xffffffff));
- fh[5] = cpu_to_le32(generation);
-
- spin_unlock(&dentry->d_lock);
-
- len = 6;
- type = 2;
-
- trace_ocfs2_encode_fh_parent((unsigned long long)blkno,
- generation);
- }
-
- *max_len = len;
-
-bail:
- trace_ocfs2_encode_fh_type(type);
- return type;
-}
-
-static struct dentry *ocfs2_fh_to_dentry(struct super_block *sb,
- struct fid *fid, int fh_len, int fh_type)
-{
- struct ocfs2_inode_handle handle;
-
- if (fh_len < 3 || fh_type > 2)
- return NULL;
-
- handle.ih_blkno = (u64)le32_to_cpu(fid->raw[0]) << 32;
- handle.ih_blkno |= (u64)le32_to_cpu(fid->raw[1]);
- handle.ih_generation = le32_to_cpu(fid->raw[2]);
- return ocfs2_get_dentry(sb, &handle);
-}
-
-static struct dentry *ocfs2_fh_to_parent(struct super_block *sb,
- struct fid *fid, int fh_len, int fh_type)
-{
- struct ocfs2_inode_handle parent;
-
- if (fh_type != 2 || fh_len < 6)
- return NULL;
-
- parent.ih_blkno = (u64)le32_to_cpu(fid->raw[3]) << 32;
- parent.ih_blkno |= (u64)le32_to_cpu(fid->raw[4]);
- parent.ih_generation = le32_to_cpu(fid->raw[5]);
- return ocfs2_get_dentry(sb, &parent);
-}
-
-const struct export_operations ocfs2_export_ops = {
- .encode_fh = ocfs2_encode_fh,
- .fh_to_dentry = ocfs2_fh_to_dentry,
- .fh_to_parent = ocfs2_fh_to_parent,
- .get_parent = ocfs2_get_parent,
-};
generated by cgit (git 2.34.1) at 2025-01-23 19:37:14 +0000