#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_cache_inode (struct inode *inode, void *opaque)
{
- struct inode *cache_inode;
- ENTRY;
-
- if (!inode)
- return;
-
- CDEBUG(D_INODE, "read_inode ino %lu\n", inode->i_ino);
-
+ struct smfs_inode_info *sm_info = (struct smfs_inode_info *)opaque;
+ struct inode *cache_inode = NULL;
+
cache_inode = iget(S2CSB(inode->i_sb), inode->i_ino);
-
- I2CI(inode) = cache_inode;
+ if (sm_info)
+ memcpy(I2SMI(inode), sm_info, sizeof(struct smfs_inode_info));
+
+ 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;
+#if CONFIG_SNAPFS
+ if (sm_info) {
+ smfs_init_snap_inode_info(inode, &sm_info->sm_sninfo);
+ }
+#endif
}
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_cache_inode(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 snap_inode_info *sn_info = &I2SMI(inode)->sm_sninfo;
+ struct snap_inode_info *test_info = (struct snap_inode_info *)opaque;
+
+ if (!sn_info || !test_info)
+ return 0;
+ if (sn_info->sn_index != test_info->sn_index)
+ return 0;
+ if (sn_info->sn_gen != test_info->sn_gen)
+ return 0;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ smfs_init_cache_inode(inode, opaque);
+#endif
+ 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_inode_info *si_info)
+{
+ struct inode *inode;
- cache_inode = I2CI(inode);
+ LASSERT(hash != 0);
+ inode = iget5_locked(sb, hash, smfs_test_inode, smfs_set_inode,
+ si_info);
- /* 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) {
+ if (inode->i_state & I_NEW)
+ unlock_new_inode(inode);
+ CDEBUG(D_VFSTRACE, "inode: %lu/%u(%p)\n", inode->i_ino,
+ inode->i_generation, inode);
}
- return;
+ return inode;
}
+#else
+struct inode *smfs_iget(struct super_block *sb, ino_t hash,
+ struct smfs_inode_info *si_info)
+{
+ struct inode *inode;
+ LASSERT(hash != 0);
+
+ inode = iget4(sb, hash, smfs_test_inode, si_info);
+ 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 smfs_inode_info sm_info;
+ struct inode *inode = NULL;
+ ENTRY;
+
+ sm_info.smi_flags = I2SMI(dir)->smi_flags;
+ sm_info.sm_sninfo.sn_flags = I2SMI(dir)->sm_sninfo.sn_flags;
+ sm_info.sm_sninfo.sn_index = index;
+ sm_info.sm_sninfo.sn_gen = I2SMI(dir)->sm_sninfo.sn_gen;
+ inode = smfs_iget(sb, hash, &sm_info);
+
+ RETURN(inode);
+}
+EXPORT_SYMBOL(smfs_get_inode);
static void smfs_delete_inode(struct inode *inode)
{
struct inode *cache_inode;
CWARN("cache inode null\n");
return;
}
+
+ if (atomic_read(&cache_inode->i_count) > 1 &&
+ cache_inode != cache_inode->i_sb->s_root->d_inode)
+ iput(cache_inode);
+
if (S2CSB(inode->i_sb)->s_op->put_inode)
S2CSB(inode->i_sb)->s_op->put_inode(cache_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);
+
+ if (cache_inode != cache_inode->i_sb->s_root->d_inode) {
+ iput(cache_inode);
+ SMFS_CLEAN_INODE_REC(inode);
+ I2CI(inode) = NULL;
+ }
+ 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