-/*
- * smfs/inode.c
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
*
+ * lustre/smfs/inode.c
+ * Lustre filesystem abstraction routines
+ *
+ * Copyright (C) 2004 Cluster File Systems, Inc.
+ *
+ * This file is part of Lustre, http://www.lustre.org.
+ *
+ * Lustre is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * Lustre 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 Lustre; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define DEBUG_SUBSYSTEM S_SM
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/string.h>
-#include "smfs_internal.h"
+#include <linux/obd_class.h>
+#include <linux/obd_support.h>
+#include <linux/lustre_lib.h>
+#include <linux/lustre_idl.h>
+#include <linux/lustre_fsfilt.h>
+#include <linux/lustre_smfs.h>
+#include "smfs_internal.h"
-void duplicate_inode(struct inode *cache_inode, struct inode *inode)
+static void smfs_read_inode(struct inode *inode)
{
-
- inode->i_mode = cache_inode->i_mode;
- inode->i_uid = cache_inode->i_uid;
- inode->i_gid = cache_inode->i_gid;
-
- inode->i_nlink = cache_inode->i_nlink;
- inode->i_size = cache_inode->i_size;
- inode->i_atime = cache_inode->i_atime;
- inode->i_ctime = cache_inode->i_ctime;
- inode->i_mtime = cache_inode->i_mtime;
- inode->i_blksize = cache_inode->i_blksize; /* This is the optimal IO size
- * (for stat), not the fs block
- * size */
- inode->i_blocks = cache_inode->i_blocks;
- inode->i_version = cache_inode->i_version;
- inode->i_state = cache_inode->i_state;
+ struct inode *cache_inode;
+ ENTRY;
+
+ if (!inode)
+ return;
+
+ CDEBUG(D_INODE, "read_inode ino %lu\n", inode->i_ino);
+
+ cache_inode = iget(S2CSB(inode->i_sb), inode->i_ino);
+
+ I2CI(inode) = cache_inode;
+
+ post_smfs_inode(inode, cache_inode);
+ sm_set_inode_ops(cache_inode, inode);
+
+ CDEBUG(D_INODE, "read_inode ino %lu icount %d \n",
+ inode->i_ino, atomic_read(&inode->i_count));
+ return;
}
-static void smfs_read_inode(struct inode *inode)
+
+static void smfs_read_inode2(struct inode *inode, void *opaque)
{
- struct super_block *cache_sb;
- struct inode *cache_inode;
- ENTRY;
-
- if (!inode)
- return;
-
- CDEBUG(D_INODE, "read_inode ino %lu\n", inode->i_ino);
- cache_sb = S2CSB(inode->i_sb);
-
- cache_inode = iget(cache_sb, inode->i_ino);
- I2CI(inode) = cache_inode;
-
- if(cache_sb && cache_sb->s_op->read_inode)
- cache_sb->s_op->read_inode(cache_inode);
-
- duplicate_inode(cache_inode, inode);
- sm_set_inode_ops(cache_inode, inode);
-
- CDEBUG(D_INODE, "read_inode ino %lu icount %d \n",
- inode->i_ino, atomic_read(&inode->i_count));
-
- iput(cache_inode);
- return;
+ struct inode *cache_inode;
+ ENTRY;
+
+ if (!inode)
+ return;
+
+ CDEBUG(D_INODE, "read_inode ino %lu\n", inode->i_ino);
+
+ cache_inode = iget(S2CSB(inode->i_sb), inode->i_ino);
+
+ if (opaque)
+ I2SMI(inode)->smi_flags = *((int *)opaque);
+
+ I2CI(inode) = cache_inode;
+
+ post_smfs_inode(inode, cache_inode);
+ sm_set_inode_ops(cache_inode, inode);
+#if CONFIG_SNAPFS
+ if (opaque)
+ smfs_init_snap_inode_info(inode, *((int *)opaque));
+#endif
+ CDEBUG(D_INODE, "read_inode ino %lu icount %d \n",
+ inode->i_ino, atomic_read(&inode->i_count));
+ return;
}
+
/* Although some filesystem(such as ext3) do not have
- * clear_inode method, but we need it to free the
- * cache inode
+ * clear_inode method, but we need it to free the
+ * cache inode
*/
static void smfs_clear_inode(struct inode *inode)
{
- struct super_block *cache_sb;
- struct inode *cache_inode;
-
- ENTRY;
-
- if (!inode) return;
-
- cache_sb = S2CSB(inode->i_sb);
- cache_inode = I2CI(inode);
-
- duplicate_inode(inode, cache_inode);
-
- if (cache_sb->s_op->clear_inode)
- cache_sb->s_op->clear_inode(cache_inode);
-
- duplicate_inode(inode, cache_inode);
-
- return;
+ struct inode *cache_inode;
+
+ ENTRY;
+
+ if (!inode) return;
+
+ cache_inode = I2CI(inode);
+
+ /* FIXME: because i_count of cache_inode may not
+ * be 0 or 1 in before smfs_delete inode, So we
+ * need to dec it to 1 before we call delete_inode
+ * of the bellow cache filesystem Check again latter. */
+ if (cache_inode != cache_inode->i_sb->s_root->d_inode) {
+ struct list_head *lp;
+ struct dentry *tmp;
+ while (!list_empty(&cache_inode->i_dentry)) {
+ lp = cache_inode->i_dentry.next;
+ tmp = list_entry(lp, struct dentry, d_alias);
+ if (atomic_read(&tmp->d_count) >= 1)
+ post_smfs_dentry(tmp);
+ }
+ if (atomic_read(&cache_inode->i_count) < 1)
+ LBUG();
+
+ while (atomic_read(&cache_inode->i_count) != 1) {
+ atomic_dec(&cache_inode->i_count);
+ }
+ iput(cache_inode);
+ SMFS_CLEAN_INODE_REC(inode);
+ I2CI(inode) = NULL;
+ }
+ return;
}
+
static void smfs_delete_inode(struct inode *inode)
{
- struct inode *cache_inode;
- struct super_block *cache_sb;
-
- ENTRY;
- cache_inode = I2CI(inode);
- cache_sb = S2CSB(inode->i_sb);
-
- if (!cache_inode || !cache_sb ||
- !cache_inode->i_nlink) {
- clear_inode(inode);
- return;
- }
- duplicate_inode(inode, cache_inode);
-
- list_del(&cache_inode->i_hash);
+ struct inode *cache_inode;
+
+ ENTRY;
+ cache_inode = I2CI(inode);
+
+ if (!cache_inode || !S2CSB(inode->i_sb))
+ return;
+
+ /* FIXME-WANGDI: because i_count of cache_inode may not be 0 or 1 in
+ * before smfs_delete inode, So we need to dec it to 1 before we call
+ * delete_inode of the bellow cache filesystem Check again latter. */
+
+ if (atomic_read(&cache_inode->i_count) < 1)
+ BUG();
+
+ while (atomic_read(&cache_inode->i_count) != 1)
+ atomic_dec(&cache_inode->i_count);
+
+ pre_smfs_inode(inode, cache_inode);
+
+ if (atomic_read(&cache_inode->i_count) < 1)
+ LBUG();
+
+ while (atomic_read(&cache_inode->i_count) != 1) {
+ atomic_dec(&cache_inode->i_count);
+ }
+
+ pre_smfs_inode(inode, cache_inode);
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ list_del(&cache_inode->i_hash);
INIT_LIST_HEAD(&cache_inode->i_hash);
+#else
+ hlist_del_init(&cache_inode->i_hash);
+#endif
+
list_del(&cache_inode->i_list);
INIT_LIST_HEAD(&cache_inode->i_list);
-
- if (cache_inode->i_data.nrpages)
- truncate_inode_pages(&cache_inode->i_data, 0);
-
- if (cache_sb->s_op->delete_inode)
- cache_sb->s_op->delete_inode(cache_inode);
-
- duplicate_inode(cache_inode, inode);
-
- return;
+
+ if (cache_inode->i_data.nrpages)
+ truncate_inode_pages(&cache_inode->i_data, 0);
+
+ if (S2CSB(inode->i_sb)->s_op->delete_inode)
+ S2CSB(inode->i_sb)->s_op->delete_inode(cache_inode);
+
+ post_smfs_inode(inode, cache_inode);
+
+ I2CI(inode) = NULL;
+ return;
}
+
static void smfs_write_inode(struct inode *inode, int wait)
{
- struct inode *cache_inode;
- struct super_block *cache_sb;
-
- ENTRY;
- cache_inode = I2CI(inode);
- cache_sb = S2CSB(inode->i_sb);
-
- if (!cache_inode || !cache_sb)
- return;
-
- if (cache_sb->s_op->write_inode)
- cache_sb->s_op->write_inode(cache_inode, wait);
-
- duplicate_inode(cache_inode, inode);
-
- return;
+ struct inode *cache_inode;
+
+ ENTRY;
+ cache_inode = I2CI(inode);
+
+ if (!cache_inode) {
+ CWARN("cache inode null\n");
+ return;
+ }
+ pre_smfs_inode(inode, cache_inode);
+ if (S2CSB(inode->i_sb)->s_op->write_inode)
+ S2CSB(inode->i_sb)->s_op->write_inode(cache_inode, wait);
+
+ post_smfs_inode(inode, cache_inode);
+ EXIT;
}
+
static void smfs_dirty_inode(struct inode *inode)
{
- struct inode *cache_inode;
- struct super_block *cache_sb;
+ struct inode *cache_inode;
+
+ ENTRY;
+ cache_inode = I2CI(inode);
- ENTRY;
- cache_inode = I2CI(inode);
- cache_sb = S2CSB(inode->i_sb);
+ if (!cache_inode || !S2CSB(inode->i_sb))
+ return;
- if (!cache_inode || !cache_sb)
- return;
-
- if (cache_sb->s_op->dirty_inode)
- cache_sb->s_op->dirty_inode(cache_inode);
+ pre_smfs_inode(inode, cache_inode);
+ if (S2CSB(inode->i_sb)->s_op->dirty_inode)
+ S2CSB(inode->i_sb)->s_op->dirty_inode(cache_inode);
- duplicate_inode(cache_inode, inode);
- return;
+ post_smfs_inode(inode, cache_inode);
+ EXIT;
}
static void smfs_put_inode(struct inode *inode)
{
- struct inode *cache_inode;
- struct super_block *cache_sb;
+ struct inode *cache_inode;
- ENTRY;
- cache_inode = I2CI(inode);
- cache_sb = S2CSB(inode->i_sb);
+ ENTRY;
+ cache_inode = I2CI(inode);
- if (!cache_inode || !cache_sb)
- return;
- iput(cache_inode);
+ if (!cache_inode) {
+ CWARN("cache inode null\n");
+ return;
+ }
+ if (S2CSB(inode->i_sb)->s_op->put_inode)
+ S2CSB(inode->i_sb)->s_op->put_inode(cache_inode);
- return;
+ EXIT;
}
static void smfs_write_super(struct super_block *sb)
{
- struct super_block *cache_sb;
+ ENTRY;
- ENTRY;
- cache_sb = S2CSB(sb);
+ if (!S2CSB(sb))
+ return;
- if (!cache_sb)
- return;
-
- if (cache_sb->s_op->write_super)
- cache_sb->s_op->write_super(cache_sb);
-
- duplicate_sb(cache_sb, sb);
- return;
+ if (S2CSB(sb)->s_op->write_super)
+ S2CSB(sb)->s_op->write_super(S2CSB(sb));
+ duplicate_sb(sb, S2CSB(sb));
+ EXIT;
}
static void smfs_write_super_lockfs(struct super_block *sb)
{
- struct super_block *cache_sb;
+ struct super_block *cache_sb;
+ ENTRY;
- ENTRY;
- cache_sb = S2CSB(sb);
+ cache_sb = S2CSB(sb);
+ if (!cache_sb)
+ return;
- if (!cache_sb)
- return;
-
- if (cache_sb->s_op->write_super_lockfs)
- cache_sb->s_op->write_super_lockfs(cache_sb);
+ if (cache_sb->s_op->write_super_lockfs)
+ cache_sb->s_op->write_super_lockfs(cache_sb);
- duplicate_sb(cache_sb, sb);
- return;
+ duplicate_sb(sb, cache_sb);
+ EXIT;
}
static void smfs_unlockfs(struct super_block *sb)
{
- struct super_block *cache_sb;
+ struct super_block *cache_sb;
+ ENTRY;
- ENTRY;
- cache_sb = S2CSB(sb);
+ cache_sb = S2CSB(sb);
+ if (!cache_sb)
+ return;
- if (!cache_sb)
- return;
-
- if (cache_sb->s_op->unlockfs)
- cache_sb->s_op->unlockfs(cache_sb);
+ if (cache_sb->s_op->unlockfs)
+ cache_sb->s_op->unlockfs(cache_sb);
- duplicate_sb(cache_sb, sb);
- return;
+ duplicate_sb(sb, cache_sb);
+ EXIT;
}
-static int smfs_statfs(struct super_block * sb, struct statfs * buf)
-{
- struct super_block *cache_sb;
- int rc = 0;
-
- ENTRY;
- cache_sb = S2CSB(sb);
- if (!cache_sb)
- RETURN(-EINVAL);
-
- if (cache_sb->s_op->statfs)
- rc = cache_sb->s_op->statfs(cache_sb, buf);
-
- duplicate_sb(cache_sb, sb);
-
- return rc;
-}
-static int smfs_remount(struct super_block * sb, int * flags, char * data)
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+static int smfs_statfs(struct super_block *sb, struct statfs *buf)
+#else
+static int smfs_statfs(struct super_block *sb, struct kstatfs *buf)
+#endif
{
- struct super_block *cache_sb;
- int rc = 0;
+ struct super_block *cache_sb;
+ int rc = 0;
+ ENTRY;
+
+ cache_sb = S2CSB(sb);
+ if (!cache_sb)
+ RETURN(-EINVAL);
- ENTRY;
- cache_sb = S2CSB(sb);
+ if (cache_sb->s_op->statfs)
+ rc = cache_sb->s_op->statfs(cache_sb, buf);
- if (!cache_sb)
- RETURN(-EINVAL);
-
- if (cache_sb->s_op->remount_fs)
- rc = cache_sb->s_op->remount_fs(cache_sb, flags, data);
+ duplicate_sb(sb, cache_sb);
- duplicate_sb(cache_sb, sb);
- RETURN(rc);
+ RETURN(rc);
}
-struct super_operations smfs_super_ops = {
- read_inode: smfs_read_inode,
- //clear_inode: smfs_clear_inode,
- put_super: smfs_put_super,
- delete_inode: smfs_delete_inode,
- write_inode: smfs_write_inode,
- dirty_inode: smfs_dirty_inode, /* BKL not held. We take it */
- put_inode: smfs_put_inode, /* BKL not held. Don't need */
-
- write_super: smfs_write_super, /* BKL held */
- write_super_lockfs: smfs_write_super_lockfs, /* BKL not held. Take it */
- unlockfs: smfs_unlockfs, /* BKL not held. We take it */
- statfs: smfs_statfs, /* BKL held */
- remount_fs: smfs_remount, /* BKL held */
-};
+static int smfs_remount(struct super_block *sb, int *flags, char *data)
+{
+ struct super_block *cache_sb;
+ int rc = 0;
+ ENTRY;
+ cache_sb = S2CSB(sb);
+ if (!cache_sb)
+ RETURN(-EINVAL);
+ if (cache_sb->s_op->remount_fs)
+ rc = cache_sb->s_op->remount_fs(cache_sb, flags, data);
+ duplicate_sb(sb, cache_sb);
+ RETURN(rc);
+}
+struct super_operations smfs_super_ops = {
+ .read_inode = smfs_read_inode,
+ .read_inode2 = smfs_read_inode2,
+ .clear_inode = smfs_clear_inode,
+ .put_super = smfs_put_super,
+ .delete_inode = smfs_delete_inode,
+ .write_inode = smfs_write_inode,
+ .dirty_inode = smfs_dirty_inode, /* BKL not held. */
+ .put_inode = smfs_put_inode, /* BKL not held. */
+ .write_super = smfs_write_super, /* BKL held */
+ .write_super_lockfs = smfs_write_super_lockfs, /* BKL not held. */
+ .unlockfs = smfs_unlockfs, /* BKL not held. */
+ .statfs = smfs_statfs, /* BKL held */
+ .remount_fs = smfs_remount, /* BKL held */
+};