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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

fs/nilfs2/dat.c

+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;

}