lkml.org 
[lkml]   [2018]   [Mar]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    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
    \
     
     \ /
      Last update: 2018-03-10 19:39    [W:4.215 / U:0.016 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site