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Commit 8908b2f7 authored by Ryusuke Konishi's avatar Ryusuke Konishi
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nilfs2: add palloc cache to dat



This adds the palloc cache to DAT file.  The palloc cache is allocated
on the extended region of nilfs_mdt_info struct.  The struct
nilfs_dat_info defines the extended on memory structure of DAT.

Signed-off-by: default avatarRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
parent db38d5ad
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+16 −2
Original line number Diff line number Diff line
@@ -33,6 +33,16 @@
#define NILFS_CNO_MIN	((__u64)1)
#define NILFS_CNO_MAX	(~(__u64)0)

struct nilfs_dat_info {
	struct nilfs_mdt_info mi;
	struct nilfs_palloc_cache palloc_cache;
};

static inline struct nilfs_dat_info *NILFS_DAT_I(struct inode *dat)
{
	return (struct nilfs_dat_info *)NILFS_MDT(dat);
}

static int nilfs_dat_prepare_entry(struct inode *dat,
				   struct nilfs_palloc_req *req, int create)
{
@@ -445,16 +455,20 @@ struct inode *nilfs_dat_new(struct the_nilfs *nilfs, size_t entry_size)
{
	static struct lock_class_key dat_lock_key;
	struct inode *dat;
	struct nilfs_dat_info *di;
	int err;

	dat = nilfs_mdt_new(nilfs, NULL, NILFS_DAT_INO, 0);
	dat = nilfs_mdt_new(nilfs, NULL, NILFS_DAT_INO, sizeof(*di));
	if (dat) {
		err = nilfs_palloc_init_blockgroup(dat, entry_size);
		if (unlikely(err)) {
			nilfs_mdt_destroy(dat);
			return NULL;
		}
		lockdep_set_class(&NILFS_MDT(dat)->mi_sem, &dat_lock_key);

		di = NILFS_DAT_I(dat);
		lockdep_set_class(&di->mi.mi_sem, &dat_lock_key);
		nilfs_palloc_setup_cache(dat, &di->palloc_cache);
	}
	return dat;
}