nilfs2: add palloc cache to ifile

This adds the palloc cache to ifile.  The palloc cache is allocated on
the extended region of nilfs_mdt_info struct.  The struct
nilfs_ifile_info defines the extended on memory structure of ifile.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

diff --git a/fs/nilfs2/ifile.c b/fs/nilfs2/ifile.c
index c1c1fd3..922d9dd 100644 (file)
--- a/fs/nilfs2/ifile.c
+++ b/fs/nilfs2/ifile.c
@@ -29,6 +29,17 @@
 #include "alloc.h"
 #include "ifile.h"
 
+
+struct nilfs_ifile_info {
+       struct nilfs_mdt_info mi;
+       struct nilfs_palloc_cache palloc_cache;
+};
+
+static inline struct nilfs_ifile_info *NILFS_IFILE_I(struct inode *ifile)
+{
+       return (struct nilfs_ifile_info *)NILFS_MDT(ifile);
+}
+
 /**
  * nilfs_ifile_create_inode - create a new disk inode
  * @ifile: ifile inode
@@ -159,13 +170,16 @@ struct inode *nilfs_ifile_new(struct nilfs_sb_info *sbi, size_t inode_size)
        struct inode *ifile;
        int err;
 
-       ifile = nilfs_mdt_new(sbi->s_nilfs, sbi->s_super, NILFS_IFILE_INO, 0);
+       ifile = nilfs_mdt_new(sbi->s_nilfs, sbi->s_super, NILFS_IFILE_INO,
+                             sizeof(struct nilfs_ifile_info));
        if (ifile) {
                err = nilfs_palloc_init_blockgroup(ifile, inode_size);
                if (unlikely(err)) {
                        nilfs_mdt_destroy(ifile);
                        return NULL;
                }
+               nilfs_palloc_setup_cache(ifile,
+                                        &NILFS_IFILE_I(ifile)->palloc_cache);
        }
        return ifile;
 }