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b9a0f1709f
Add the .totl. xattr tag. When the tag is set the end of the name specifies a total name with 3 encoded u64s separated by dots. The value of the xattr is a u64 that is added to the named total. An ioctl is added to read the totals. Signed-off-by: Zach Brown <zab@versity.com>
55 lines
2.0 KiB
C
55 lines
2.0 KiB
C
#ifndef _SCOUTFS_FOREST_H_
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#define _SCOUTFS_FOREST_H_
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struct scoutfs_alloc;
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struct scoutfs_block_writer;
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struct scoutfs_block;
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#include "btree.h"
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/* caller gives an item to the callback */
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enum {
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FIC_FS_ROOT = (1 << 0),
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FIC_FINALIZED = (1 << 1),
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};
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typedef int (*scoutfs_forest_item_cb)(struct super_block *sb, struct scoutfs_key *key, u64 seq,
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u8 flags, void *val, int val_len, int fic, void *arg);
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int scoutfs_forest_next_hint(struct super_block *sb, struct scoutfs_key *key,
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struct scoutfs_key *next);
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int scoutfs_forest_read_items(struct super_block *sb,
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struct scoutfs_key *key,
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struct scoutfs_key *bloom_key,
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struct scoutfs_key *start,
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struct scoutfs_key *end,
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scoutfs_forest_item_cb cb, void *arg);
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int scoutfs_forest_set_bloom_bits(struct super_block *sb,
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struct scoutfs_lock *lock);
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void scoutfs_forest_set_max_seq(struct super_block *sb, u64 max_seq);
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int scoutfs_forest_get_max_seq(struct super_block *sb,
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struct scoutfs_super_block *super,
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u64 *seq);
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int scoutfs_forest_insert_list(struct super_block *sb,
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struct scoutfs_btree_item_list *lst);
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int scoutfs_forest_srch_add(struct super_block *sb, u64 hash, u64 ino, u64 id);
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void scoutfs_forest_init_btrees(struct super_block *sb,
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struct scoutfs_alloc *alloc,
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struct scoutfs_block_writer *wri,
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struct scoutfs_log_trees *lt);
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void scoutfs_forest_get_btrees(struct super_block *sb,
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struct scoutfs_log_trees *lt);
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/* > 0 error codes */
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#define SCOUTFS_DELTA_COMBINED 1 /* src val was combined, drop src */
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#define SCOUTFS_DELTA_COMBINED_NULL 2 /* combined val has no data, drop both */
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int scoutfs_forest_combine_deltas(struct scoutfs_key *key, void *dst, int dst_len,
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void *src, int src_len);
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int scoutfs_forest_setup(struct super_block *sb);
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void scoutfs_forest_start(struct super_block *sb);
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void scoutfs_forest_stop(struct super_block *sb);
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void scoutfs_forest_destroy(struct super_block *sb);
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#endif
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