/* -*- 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.
* 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/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"
-static void smfs_read_inode(struct inode *inode)
+static void smfs_init_inode_info (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);
-
- SMFS_SET_INODE_REC(inode);
- SMFS_SET_INODE_CACHE_HOOK(inode);
+ struct smfs_iget_args *sargs = (struct smfs_iget_args*)opaque;
+ struct inode *cache_inode = NULL;
+
+#if 0
+ if (sargs)
+ cache_inode = iget(S2CSB(inode->i_sb), sargs->s_ino);
+ else
+#endif
+ cache_inode = iget(S2CSB(inode->i_sb), inode->i_ino);
+
+ OBD_ALLOC(I2SMI(inode), sizeof(struct smfs_inode_info));
+ LASSERT(I2SMI(inode));
I2CI(inode) = cache_inode;
-
- pre_smfs_inode(inode, cache_inode);
- if (cache_sb && cache_sb->s_op->read_inode)
- cache_sb->s_op->read_inode(cache_inode);
-
+ CDEBUG(D_INODE, "cache_inode i_count ino %lu i_count %d\n",
+ cache_inode->i_ino, atomic_read(&cache_inode->i_count));
post_smfs_inode(inode, cache_inode);
sm_set_inode_ops(cache_inode, inode);
+ if (sargs) {
+ struct inode *dir = sargs->s_inode;
+ if (dir)
+ I2SMI(inode)->smi_flags = I2SMI(dir)->smi_flags;
+ }
+}
- CDEBUG(D_INODE, "read_inode ino %lu icount %d \n",
- inode->i_ino, atomic_read(&inode->i_count));
- EXIT;
+static void smfs_clear_inode_info(struct inode *inode)
+{
+ if (I2SMI(inode)) {
+ struct inode *cache_inode = I2CI(inode);
+ LASSERTF(((atomic_read(&cache_inode->i_count) == 0) ||
+ cache_inode == cache_inode->i_sb->s_root->d_inode),
+ "inode %p cache inode %p %lu i_count %d != 0 \n",
+ inode, cache_inode, cache_inode->i_ino,
+ atomic_read(&cache_inode->i_count));
+
+ OBD_FREE(I2SMI(inode), sizeof(struct smfs_inode_info));
+ I2SMI(inode) = NULL;
+ }
}
-/* Although some filesystem(such as ext3) do not have
- * clear_inode method, but we need it to free the
- * cache inode
- */
-static void smfs_clear_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);
+ smfs_init_inode_info(inode, opaque);
+ CDEBUG(D_INODE, "read_inode ino %lu icount %d \n",
+ inode->i_ino, atomic_read(&inode->i_count));
+ EXIT;
+ return;
+}
- cache_sb = S2CSB(inode->i_sb);
- 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 (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+static int smfs_test_inode(struct inode *inode, unsigned long ino,
+ void *opaque)
+#else
+static int smfs_test_inode(struct inode *inode, void *opaque)
+#endif
+{
+ struct smfs_iget_args *sargs = (struct smfs_iget_args*)opaque;
+
+ LASSERT(sargs);
+ if (!sargs)
+ return 1;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ if (inode->i_ino != sargs->s_ino)
+ return 0;
+#endif
+#ifdef CONFIG_SNAPFS
+ if (SMFS_DO_COW(S2SMI(inode->i_sb)) &&
+ !smfs_snap_test_inode(inode, opaque))
+ return 0;
+#endif
+ return 1;
+}
- if (atomic_read(&cache_inode->i_count) < 1)
- BUG();
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
+int smfs_set_inode(struct inode *inode, void *opaque)
+{
+ smfs_read_inode2(inode, opaque);
+ return 0;
+}
- while (atomic_read(&cache_inode->i_count) != 1)
- atomic_dec(&cache_inode->i_count);
+struct inode *smfs_iget(struct super_block *sb, ino_t hash,
+ struct smfs_iget_args *sargs)
+{
+ struct inode *inode;
+
+ LASSERT(hash != 0);
+
+ inode = iget5_locked(sb, hash, smfs_test_inode, smfs_set_inode, sargs);
+ if (inode) {
+ if (inode->i_state & I_NEW)
+ unlock_new_inode(inode);
+ CDEBUG(D_VFSTRACE, "inode: %lu/%u(%p) index %d ino %lu \n",
+ inode->i_ino, inode->i_generation, inode, sargs->s_index,
+ sargs->s_ino);
+ inode->i_ino = hash;
+ }
+ return inode;
+}
+#else
+struct inode *smfs_iget(struct super_block *sb, ino_t hash,
+ struct smfs_iget_args *sargs)
+{
+ struct inode *inode;
+ LASSERT(hash != 0);
- iput(cache_inode);
+ inode = iget4(sb, hash, smfs_test_inode, sargs);
- SMFS_CLEAN_INODE_REC(inode);
- I2CI(inode) = NULL;
- EXIT;
+ if (inode)
+ CDEBUG(D_VFSTRACE, "inode: %lu/%u(%p)\n", inode->i_ino,
+ inode->i_generation, inode);
+ return inode;
}
-
+#endif
+struct inode *smfs_get_inode (struct super_block *sb, ino_t hash,
+ struct inode *dir, int index)
+{
+ struct inode *inode;
+ struct smfs_iget_args sargs;
+ ENTRY;
+
+ sargs.s_index = index;
+ sargs.s_inode = dir;
+ sargs.s_ino = hash;
+ inode = smfs_iget(sb, hash, &sargs);
+
+ RETURN(inode);
+}
+
static void smfs_delete_inode(struct inode *inode)
{
struct inode *cache_inode;
- struct super_block *cache_sb;
- ENTRY;
+ ENTRY;
cache_inode = I2CI(inode);
- cache_sb = S2CSB(inode->i_sb);
- if (!cache_inode || !cache_sb)
+ 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 (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
#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);
+ 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;
- EXIT;
+ smfs_clear_inode_info(inode);
+
+ return;
}
static void smfs_write_inode(struct inode *inode, int wait)
{
struct inode *cache_inode;
- struct super_block *cache_sb;
- ENTRY;
+ ENTRY;
cache_inode = I2CI(inode);
- cache_sb = S2CSB(inode->i_sb);
- if (!cache_inode || !cache_sb)
+ if (!cache_inode) {
+ CWARN("cache inode null\n");
return;
-
+ }
pre_smfs_inode(inode, cache_inode);
-
- if (cache_sb->s_op->write_inode)
- cache_sb->s_op->write_inode(cache_inode, wait);
-
+ 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;
- ENTRY;
+ ENTRY;
cache_inode = I2CI(inode);
- cache_sb = S2CSB(inode->i_sb);
- if (!cache_inode || !cache_sb)
+ if (!cache_inode || !S2CSB(inode->i_sb))
return;
pre_smfs_inode(inode, cache_inode);
- if (cache_sb->s_op->dirty_inode)
- cache_sb->s_op->dirty_inode(cache_inode);
+ if (S2CSB(inode->i_sb)->s_op->dirty_inode)
+ S2CSB(inode->i_sb)->s_op->dirty_inode(cache_inode);
post_smfs_inode(inode, cache_inode);
EXIT;
static void smfs_put_inode(struct inode *inode)
{
struct inode *cache_inode;
- struct super_block *cache_sb;
- ENTRY;
+ ENTRY;
cache_inode = I2CI(inode);
- cache_sb = S2CSB(inode->i_sb);
- if (!cache_inode || !cache_sb)
+ if (!cache_inode) {
+ CWARN("cache inode null\n");
return;
- if (cache_sb->s_op->put_inode)
- cache_sb->s_op->put_inode(cache_inode);
+ }
+
+ if (atomic_read(&cache_inode->i_count) > 0) {
+ iput(cache_inode);
+ }
+
+ if (S2CSB(inode->i_sb)->s_op->put_inode)
+ S2CSB(inode->i_sb)->s_op->put_inode(cache_inode);
+
EXIT;
}
static void smfs_write_super(struct super_block *sb)
{
- struct super_block *cache_sb;
ENTRY;
- cache_sb = S2CSB(sb);
- if (!cache_sb)
+ if (!S2CSB(sb))
return;
- if (cache_sb->s_op->write_super)
- cache_sb->s_op->write_super(cache_sb);
+ if (S2CSB(sb)->s_op->write_super)
+ S2CSB(sb)->s_op->write_super(S2CSB(sb));
+ duplicate_sb(sb, S2CSB(sb));
+ EXIT;
+ return;
+}
- duplicate_sb(sb, cache_sb);
+static void smfs_clear_inode(struct inode *inode)
+{
+ struct inode *cache_inode;
+
+ ENTRY;
+
+ if (!inode) return;
+
+ cache_inode = I2CI(inode);
+
+ smfs_clear_inode_info(inode);
+
EXIT;
+ return;
}
static void smfs_write_super_lockfs(struct super_block *sb)
RETURN(rc);
}
-
static int smfs_remount(struct super_block *sb, int *flags, char *data)
{
struct super_block *cache_sb;
duplicate_sb(sb, cache_sb);
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 */
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ .read_inode2 = smfs_read_inode2,
+#endif
+ .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 */
};
+
+int is_smfs_sb(struct super_block *sb)
+{
+ return (sb->s_op->put_super == smfs_super_ops.put_super);
+}
+EXPORT_SYMBOL(is_smfs_sb);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff