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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: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
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@ -33,6 +33,16 @@
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#define NILFS_CNO_MIN ((__u64)1)
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#define NILFS_CNO_MAX (~(__u64)0)
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struct nilfs_dat_info {
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struct nilfs_mdt_info mi;
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struct nilfs_palloc_cache palloc_cache;
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};
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static inline struct nilfs_dat_info *NILFS_DAT_I(struct inode *dat)
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{
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return (struct nilfs_dat_info *)NILFS_MDT(dat);
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}
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static int nilfs_dat_prepare_entry(struct inode *dat,
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struct nilfs_palloc_req *req, int create)
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{
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@ -445,16 +455,20 @@ struct inode *nilfs_dat_new(struct the_nilfs *nilfs, size_t entry_size)
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{
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static struct lock_class_key dat_lock_key;
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struct inode *dat;
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struct nilfs_dat_info *di;
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int err;
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dat = nilfs_mdt_new(nilfs, NULL, NILFS_DAT_INO, 0);
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dat = nilfs_mdt_new(nilfs, NULL, NILFS_DAT_INO, sizeof(*di));
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if (dat) {
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err = nilfs_palloc_init_blockgroup(dat, entry_size);
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if (unlikely(err)) {
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nilfs_mdt_destroy(dat);
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return NULL;
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}
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lockdep_set_class(&NILFS_MDT(dat)->mi_sem, &dat_lock_key);
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di = NILFS_DAT_I(dat);
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lockdep_set_class(&di->mi.mi_sem, &dat_lock_key);
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nilfs_palloc_setup_cache(dat, &di->palloc_cache);
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}
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return dat;
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}
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