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Subject[RFC v2 27/83] Save the inode inuse list to pmem upon umount
Date
From: Andiry Xu <jix024@cs.ucsd.edu>

Signed-off-by: Andiry Xu <jix024@cs.ucsd.edu>
---
fs/nova/bbuild.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
fs/nova/bbuild.h | 1 +
fs/nova/super.c | 1 +
3 files changed, 50 insertions(+)

diff --git a/fs/nova/bbuild.c b/fs/nova/bbuild.c
index 12a2f11..66053cb 100644
--- a/fs/nova/bbuild.c
+++ b/fs/nova/bbuild.c
@@ -116,6 +116,54 @@ static u64 nova_save_free_list_blocknodes(struct super_block *sb, int cpu,
return temp_tail;
}

+void nova_save_inode_list_to_log(struct super_block *sb)
+{
+ struct nova_inode *pi = nova_get_inode_by_ino(sb, NOVA_INODELIST_INO);
+ struct nova_inode_info_header sih;
+ struct nova_sb_info *sbi = NOVA_SB(sb);
+ unsigned long num_blocks;
+ unsigned long num_nodes = 0;
+ struct inode_map *inode_map;
+ unsigned long i;
+ u64 temp_tail;
+ u64 new_block;
+ int allocated;
+
+ sih.ino = NOVA_INODELIST_INO;
+ sih.i_blk_type = NOVA_DEFAULT_BLOCK_TYPE;
+ sih.i_blocks = 0;
+
+ for (i = 0; i < sbi->cpus; i++) {
+ inode_map = &sbi->inode_maps[i];
+ num_nodes += inode_map->num_range_node_inode;
+ }
+
+ num_blocks = num_nodes / RANGENODE_PER_PAGE;
+ if (num_nodes % RANGENODE_PER_PAGE)
+ num_blocks++;
+
+ allocated = nova_allocate_inode_log_pages(sb, &sih, num_blocks,
+ &new_block, ANY_CPU, 0);
+ if (allocated != num_blocks) {
+ nova_dbg("Error saving inode list: %d\n", allocated);
+ return;
+ }
+
+ temp_tail = new_block;
+ for (i = 0; i < sbi->cpus; i++) {
+ inode_map = &sbi->inode_maps[i];
+ temp_tail = nova_save_range_nodes_to_log(sb,
+ &inode_map->inode_inuse_tree, temp_tail, i);
+ }
+
+ pi->log_head = new_block;
+ nova_update_tail(pi, temp_tail);
+ nova_flush_buffer(&pi->log_head, CACHELINE_SIZE, 0);
+
+ nova_dbg("%s: %lu inode nodes, pi head 0x%llx, tail 0x%llx\n",
+ __func__, num_nodes, pi->log_head, pi->log_tail);
+}
+
void nova_save_blocknode_mappings_to_log(struct super_block *sb)
{
struct nova_inode *pi = nova_get_inode_by_ino(sb, NOVA_BLOCKNODE_INO);
diff --git a/fs/nova/bbuild.h b/fs/nova/bbuild.h
index 59cc379..5d2b5f0 100644
--- a/fs/nova/bbuild.h
+++ b/fs/nova/bbuild.h
@@ -3,6 +3,7 @@

void nova_init_header(struct super_block *sb,
struct nova_inode_info_header *sih, u16 i_mode);
+void nova_save_inode_list_to_log(struct super_block *sb);
void nova_save_blocknode_mappings_to_log(struct super_block *sb);

#endif
diff --git a/fs/nova/super.c b/fs/nova/super.c
index 9b60873..69e4afc 100644
--- a/fs/nova/super.c
+++ b/fs/nova/super.c
@@ -734,6 +734,7 @@ static void nova_put_super(struct super_block *sb)
int i;

if (sbi->virt_addr) {
+ nova_save_inode_list_to_log(sb);
/* Save everything before blocknode mapping! */
nova_save_blocknode_mappings_to_log(sb);
sbi->virt_addr = NULL;
--
2.7.4
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