#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 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;
+ struct smfs_iget_args *sargs = (struct smfs_iget_args*)opaque;
+ struct inode *cache_inode = NULL;
+ if (sargs)
+ cache_inode = iget(S2CSB(inode->i_sb), sargs->s_ino);
+ else
+ 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;
+ 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));
- return;
+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) == 1) ||
+ 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));
+ if (cache_inode != cache_inode->i_sb->s_root->d_inode)
+ iput(cache_inode);
+ OBD_FREE(I2SMI(inode), sizeof(struct smfs_inode_info));
+ I2SMI(inode) = NULL;
+ }
}
static void smfs_read_inode2(struct inode *inode, void *opaque)
{
- 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
+ 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;
}
-/* 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)
+#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 inode *cache_inode;
+ struct smfs_iget_args *sargs = (struct smfs_iget_args*)opaque;
+
+ LASSERT(sargs);
+ if (!sargs)
+ return 1;
+
+ if (inode->i_ino != sargs->s_ino)
+ return 0;
+#ifdef CONFIG_SNAPFS
+ if (SMFS_DO_COW(S2SMI(inode->i_sb)) &&
+ !smfs_snap_test_inode(inode, opaque))
+ return 0;
+#endif
+ if (I2SMI(inode)) {
+ struct inode *cache_inode = I2CI(inode);
+
+ LASSERTF(cache_inode->i_ino == inode->i_ino,
+ "inode ino %lu != cache ino %lu",
+ cache_inode->i_ino, inode->i_ino);
+ }
+ if (!I2SMI(inode))
+ smfs_init_inode_info(inode, opaque);
+ return 1;
+}
- ENTRY;
+#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;
+}
- if (!inode) return;
+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);
- cache_inode = I2CI(inode);
+ inode = iget4(sb, hash, smfs_test_inode, sargs);
- /* 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;
+ if (inode) {
+ struct inode *cache_inode = I2CI(inode);
+
+ LASSERTF((inode->i_ino == cache_inode->i_ino),
+ "inode %p ino %lu != cache inode %p ino %lu",
+ inode, inode->i_ino, cache_inode, cache_inode->i_ino);
+ CDEBUG(D_VFSTRACE, "inode: %lu/%u(%p)\n", inode->i_ino,
+ inode->i_generation, inode);
}
- return;
+ 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;
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);
+ if (I2SMI(inode)) {
+ cache_inode = I2CI(inode);
+ if (!cache_inode || !S2CSB(inode->i_sb))
+ return;
+ post_smfs_inode(inode, cache_inode);
+ smfs_clear_inode_info(inode);
}
-
- 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 (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;
+ inode->i_state = I_CLEAR;
return;
}
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;
}
CWARN("cache inode null\n");
return;
}
+
+ if (atomic_read(&cache_inode->i_count) > 1) {
+ iput(cache_inode);
+ }
+
if (S2CSB(inode->i_sb)->s_op->put_inode)
S2CSB(inode->i_sb)->s_op->put_inode(cache_inode);
-
+
+ if (atomic_read(&inode->i_count) == 0 &&
+ cache_inode->i_sb->s_root->d_inode != cache_inode)
+ smfs_clear_inode_info(inode);
+
EXIT;
}
S2CSB(sb)->s_op->write_super(S2CSB(sb));
duplicate_sb(sb, S2CSB(sb));
EXIT;
+ return;
+}
+
+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,
+#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,
.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