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📄 Makefile.am(2.18 KB)
📄 abd.h(4.25 KB)
📄 abd_impl.h(4.41 KB)
📄 aggsum.h(1.28 KB)
📄 arc.h(11.19 KB)
📄 arc_impl.h(33.15 KB)
📄 avl.h(9.16 KB)
📄 avl_impl.h(4.8 KB)
📄 bitops.h(3.2 KB)
📄 blkptr.h(914 B)
📄 bplist.h(1.6 KB)
📄 bpobj.h(3.21 KB)
📄 bptree.h(1.89 KB)
📄 bqueue.h(1.23 KB)
📄 btree.h(7.68 KB)
📁 crypto
📄 dataset_kstats.h(2.27 KB)
📄 dbuf.h(13.94 KB)
📄 ddt.h(7.96 KB)
📄 dmu.h(39.06 KB)
📄 dmu_impl.h(6.92 KB)
📄 dmu_objset.h(9.19 KB)
📄 dmu_recv.h(2.75 KB)
📄 dmu_redact.h(1.67 KB)
📄 dmu_send.h(2.54 KB)
📄 dmu_traverse.h(3.02 KB)
📄 dmu_tx.h(4.43 KB)
📄 dmu_zfetch.h(2.23 KB)
📄 dnode.h(22.41 KB)
📄 dsl_bookmark.h(5.05 KB)
📄 dsl_crypt.h(7.76 KB)
📄 dsl_dataset.h(18.62 KB)
📄 dsl_deadlist.h(4.21 KB)
📄 dsl_deleg.h(3.27 KB)
📄 dsl_destroy.h(2.19 KB)
📄 dsl_dir.h(7.67 KB)
📄 dsl_pool.h(6.23 KB)
📄 dsl_prop.h(4.38 KB)
📄 dsl_scan.h(7.11 KB)
📄 dsl_synctask.h(4.06 KB)
📄 dsl_userhold.h(1.84 KB)
📄 edonr.h(2.65 KB)
📄 efi_partition.h(16.28 KB)
📁 fm
📄 frame.h(935 B)
📁 fs
📄 hkdf.h(782 B)
📁 lua
📄 metaslab.h(5.48 KB)
📄 metaslab_impl.h(21.23 KB)
📄 mmp.h(2.37 KB)
📄 mntent.h(5.22 KB)
📄 mod.h(1.26 KB)
📄 multilist.h(3.27 KB)
📄 note.h(1.62 KB)
📄 nvpair.h(14.77 KB)
📄 nvpair_impl.h(2.23 KB)
📄 objlist.h(1.13 KB)
📄 pathname.h(2.12 KB)
📄 qat.h(5.86 KB)
📄 range_tree.h(9.73 KB)
📄 rrwlock.h(3.53 KB)
📄 sa.h(5.14 KB)
📄 sa_impl.h(8.29 KB)
📄 skein.h(6.69 KB)
📄 spa.h(46.07 KB)
📄 spa_boot.h(1.16 KB)
📄 spa_checkpoint.h(1.44 KB)
📄 spa_checksum.h(1.96 KB)
📄 spa_impl.h(18.25 KB)
📄 spa_log_spacemap.h(2.62 KB)
📄 space_map.h(8.7 KB)
📄 space_reftree.h(1.69 KB)
📁 sysevent
📄 sysevent.h(1.07 KB)
📄 txg.h(4.66 KB)
📄 txg_impl.h(4.77 KB)
📄 u8_textprep.h(3.59 KB)
📄 u8_textprep_data.h(1.41 MB)
📄 uberblock.h(1.36 KB)
📄 uberblock_impl.h(5.11 KB)
📄 uio_impl.h(1.58 KB)
📄 unique.h(1.56 KB)
📄 uuid.h(2.85 KB)
📄 vdev.h(8.18 KB)
📄 vdev_disk.h(1.65 KB)
📄 vdev_draid.h(3.43 KB)
📄 vdev_file.h(1.23 KB)
📄 vdev_impl.h(22.53 KB)
📄 vdev_indirect_births.h(2.31 KB)
📄 vdev_indirect_mapping.h(4.38 KB)
📄 vdev_initialize.h(1.39 KB)
📄 vdev_raidz.h(2.04 KB)
📄 vdev_raidz_impl.h(10.54 KB)
📄 vdev_rebuild.h(3.4 KB)
📄 vdev_removal.h(2.63 KB)
📄 vdev_trim.h(1.72 KB)
📄 xvattr.h(13.1 KB)
📄 zap.h(18.63 KB)
📄 zap_impl.h(6.79 KB)
📄 zap_leaf.h(7.84 KB)
📄 zcp.h(4.87 KB)
📄 zcp_global.h(742 B)
📄 zcp_iter.h(1.07 KB)
📄 zcp_prop.h(780 B)
📄 zcp_set.h(929 B)
📄 zfeature.h(2.42 KB)
📄 zfs_acl.h(8.08 KB)
📄 zfs_bootenv.h(1.41 KB)
📄 zfs_context.h(21.23 KB)
📄 zfs_debug.h(3.3 KB)
📄 zfs_delay.h(1.25 KB)
📄 zfs_file.h(2.06 KB)
📄 zfs_fuid.h(4.26 KB)
📄 zfs_ioctl.h(17.63 KB)
📄 zfs_ioctl_impl.h(3.1 KB)
📄 zfs_onexit.h(1.65 KB)
📄 zfs_project.h(2.35 KB)
📄 zfs_quota.h(1.57 KB)
📄 zfs_racct.h(1.12 KB)
📄 zfs_ratelimit.h(1.11 KB)
📄 zfs_refcount.h(4.15 KB)
📄 zfs_rlock.h(2.54 KB)
📄 zfs_sa.h(4.38 KB)
📄 zfs_stat.h(1.45 KB)
📄 zfs_sysfs.h(1.49 KB)
📄 zfs_vfsops.h(1.05 KB)
📄 zfs_vnops.h(2 KB)
📄 zfs_znode.h(10.93 KB)
📄 zil.h(18.27 KB)
📄 zil_impl.h(9.12 KB)
📄 zio.h(21.68 KB)
📄 zio_checksum.h(4.55 KB)
📄 zio_compress.h(5.91 KB)
📄 zio_crypt.h(5.21 KB)
📄 zio_impl.h(8.33 KB)
📄 zio_priority.h(1.2 KB)
📄 zrlock.h(1.7 KB)
📁 zstd
📄 zthr.h(1.23 KB)
📄 zvol.h(2.27 KB)
📄 zvol_impl.h(3.7 KB)

Editing: zap_leaf.h

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
 */

#ifndef	_SYS_ZAP_LEAF_H
#define	_SYS_ZAP_LEAF_H

#include <sys/zap.h>

#ifdef	__cplusplus
extern "C" {
#endif

struct zap;
struct zap_name;
struct zap_stats;

#define	ZAP_LEAF_MAGIC 0x2AB1EAF

/* chunk size = 24 bytes */
#define	ZAP_LEAF_CHUNKSIZE 24

/*
 * The amount of space available for chunks is:
 * block size (1<<l->l_bs) - hash entry size (2) * number of hash
 * entries - header space (2*chunksize)
 */
#define	ZAP_LEAF_NUMCHUNKS_BS(bs) \
	(((1<<(bs)) - 2*ZAP_LEAF_HASH_NUMENTRIES_BS(bs)) / \
	ZAP_LEAF_CHUNKSIZE - 2)

#define	ZAP_LEAF_NUMCHUNKS(l) (ZAP_LEAF_NUMCHUNKS_BS(((l)->l_bs)))

#define	ZAP_LEAF_NUMCHUNKS_DEF \
	(ZAP_LEAF_NUMCHUNKS_BS(fzap_default_block_shift))

/*
 * The amount of space within the chunk available for the array is:
 * chunk size - space for type (1) - space for next pointer (2)
 */
#define	ZAP_LEAF_ARRAY_BYTES (ZAP_LEAF_CHUNKSIZE - 3)

#define	ZAP_LEAF_ARRAY_NCHUNKS(bytes) \
	(((bytes)+ZAP_LEAF_ARRAY_BYTES-1)/ZAP_LEAF_ARRAY_BYTES)

/*
 * Low water mark:  when there are only this many chunks free, start
 * growing the ptrtbl.  Ideally, this should be larger than a
 * "reasonably-sized" entry.  20 chunks is more than enough for the
 * largest directory entry (MAXNAMELEN (256) byte name, 8-byte value),
 * while still being only around 3% for 16k blocks.
 */
#define	ZAP_LEAF_LOW_WATER (20)

/*
 * The leaf hash table has block size / 2^5 (32) number of entries,
 * which should be more than enough for the maximum number of entries,
 * which is less than block size / CHUNKSIZE (24) / minimum number of
 * chunks per entry (3).
 */
#define	ZAP_LEAF_HASH_SHIFT_BS(bs) ((bs) - 5)
#define	ZAP_LEAF_HASH_NUMENTRIES_BS(bs) (1 << ZAP_LEAF_HASH_SHIFT_BS(bs))
#define	ZAP_LEAF_HASH_SHIFT(l) (ZAP_LEAF_HASH_SHIFT_BS(((l)->l_bs)))
#define	ZAP_LEAF_HASH_NUMENTRIES(l) (ZAP_LEAF_HASH_NUMENTRIES_BS(((l)->l_bs)))

/*
 * The chunks start immediately after the hash table.  The end of the
 * hash table is at l_hash + HASH_NUMENTRIES, which we simply cast to a
 * chunk_t.
 */
#define	ZAP_LEAF_CHUNK(l, idx) \
	((zap_leaf_chunk_t *) \
	(zap_leaf_phys(l)->l_hash + ZAP_LEAF_HASH_NUMENTRIES(l)))[idx]
#define	ZAP_LEAF_ENTRY(l, idx) (&ZAP_LEAF_CHUNK(l, idx).l_entry)

typedef enum zap_chunk_type {
	ZAP_CHUNK_FREE = 253,
	ZAP_CHUNK_ENTRY = 252,
	ZAP_CHUNK_ARRAY = 251,
	ZAP_CHUNK_TYPE_MAX = 250
} zap_chunk_type_t;

#define	ZLF_ENTRIES_CDSORTED (1<<0)

/*
 * TAKE NOTE:
 * If zap_leaf_phys_t is modified, zap_leaf_byteswap() must be modified.
 */
typedef struct zap_leaf_phys {
	struct zap_leaf_header {
		/* Public to ZAP */
		uint64_t lh_block_type;		/* ZBT_LEAF */
		uint64_t lh_pad1;
		uint64_t lh_prefix;		/* hash prefix of this leaf */
		uint32_t lh_magic;		/* ZAP_LEAF_MAGIC */
		uint16_t lh_nfree;		/* number free chunks */
		uint16_t lh_nentries;		/* number of entries */
		uint16_t lh_prefix_len;		/* num bits used to id this */

/* Private to zap_leaf */
		uint16_t lh_freelist;		/* chunk head of free list */
		uint8_t lh_flags;		/* ZLF_* flags */
		uint8_t lh_pad2[11];
	} l_hdr; /* 2 24-byte chunks */

/*
	 * The header is followed by a hash table with
	 * ZAP_LEAF_HASH_NUMENTRIES(zap) entries.  The hash table is
	 * followed by an array of ZAP_LEAF_NUMCHUNKS(zap)
	 * zap_leaf_chunk structures.  These structures are accessed
	 * with the ZAP_LEAF_CHUNK() macro.
	 */

uint16_t l_hash[1];
} zap_leaf_phys_t;

typedef union zap_leaf_chunk {
	struct zap_leaf_entry {
		uint8_t le_type; 		/* always ZAP_CHUNK_ENTRY */
		uint8_t le_value_intlen;	/* size of value's ints */
		uint16_t le_next;		/* next entry in hash chain */
		uint16_t le_name_chunk;		/* first chunk of the name */
		uint16_t le_name_numints;	/* ints in name (incl null) */
		uint16_t le_value_chunk;	/* first chunk of the value */
		uint16_t le_value_numints;	/* value length in ints */
		uint32_t le_cd;			/* collision differentiator */
		uint64_t le_hash;		/* hash value of the name */
	} l_entry;
	struct zap_leaf_array {
		uint8_t la_type;		/* always ZAP_CHUNK_ARRAY */
		uint8_t la_array[ZAP_LEAF_ARRAY_BYTES];
		uint16_t la_next;		/* next blk or CHAIN_END */
	} l_array;
	struct zap_leaf_free {
		uint8_t lf_type;		/* always ZAP_CHUNK_FREE */
		uint8_t lf_pad[ZAP_LEAF_ARRAY_BYTES];
		uint16_t lf_next;	/* next in free list, or CHAIN_END */
	} l_free;
} zap_leaf_chunk_t;

typedef struct zap_leaf {
	dmu_buf_user_t l_dbu;
	krwlock_t l_rwlock;
	uint64_t l_blkid;		/* 1<<ZAP_BLOCK_SHIFT byte block off */
	int l_bs;			/* block size shift */
	dmu_buf_t *l_dbuf;
} zap_leaf_t;

static inline zap_leaf_phys_t *
zap_leaf_phys(zap_leaf_t *l)
{
	return (l->l_dbuf->db_data);
}

typedef struct zap_entry_handle {
	/* Set by zap_leaf and public to ZAP */
	uint64_t zeh_num_integers;
	uint64_t zeh_hash;
	uint32_t zeh_cd;
	uint8_t zeh_integer_size;

/* Private to zap_leaf */
	uint16_t zeh_fakechunk;
	uint16_t *zeh_chunkp;
	zap_leaf_t *zeh_leaf;
} zap_entry_handle_t;

/*
 * Return a handle to the named entry, or ENOENT if not found.  The hash
 * value must equal zap_hash(name).
 */
extern int zap_leaf_lookup(zap_leaf_t *l,
    struct zap_name *zn, zap_entry_handle_t *zeh);

/*
 * Return a handle to the entry with this hash+cd, or the entry with the
 * next closest hash+cd.
 */
extern int zap_leaf_lookup_closest(zap_leaf_t *l,
    uint64_t hash, uint32_t cd, zap_entry_handle_t *zeh);

/*
 * Read the first num_integers in the attribute.  Integer size
 * conversion will be done without sign extension.  Return EINVAL if
 * integer_size is too small.  Return EOVERFLOW if there are more than
 * num_integers in the attribute.
 */
extern int zap_entry_read(const zap_entry_handle_t *zeh,
    uint8_t integer_size, uint64_t num_integers, void *buf);

extern int zap_entry_read_name(struct zap *zap, const zap_entry_handle_t *zeh,
    uint16_t buflen, char *buf);

/*
 * Replace the value of an existing entry.
 *
 * May fail if it runs out of space (ENOSPC).
 */
extern int zap_entry_update(zap_entry_handle_t *zeh,
    uint8_t integer_size, uint64_t num_integers, const void *buf);

/*
 * Remove an entry.
 */
extern void zap_entry_remove(zap_entry_handle_t *zeh);

/*
 * Create an entry. An equal entry must not exist, and this entry must
 * belong in this leaf (according to its hash value).  Fills in the
 * entry handle on success.  Returns 0 on success or ENOSPC on failure.
 */
extern int zap_entry_create(zap_leaf_t *l, struct zap_name *zn, uint32_t cd,
    uint8_t integer_size, uint64_t num_integers, const void *buf,
    zap_entry_handle_t *zeh);

/* Determine whether there is another entry with the same normalized form. */
extern boolean_t zap_entry_normalization_conflict(zap_entry_handle_t *zeh,
    struct zap_name *zn, const char *name, struct zap *zap);

/*
 * Other stuff.
 */

extern void zap_leaf_init(zap_leaf_t *l, boolean_t sort);
extern void zap_leaf_byteswap(zap_leaf_phys_t *buf, int len);
extern void zap_leaf_split(zap_leaf_t *l, zap_leaf_t *nl, boolean_t sort);
extern void zap_leaf_stats(struct zap *zap, zap_leaf_t *l,
    struct zap_stats *zs);

#ifdef	__cplusplus
}
#endif

#endif /* _SYS_ZAP_LEAF_H */

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Editing: zap_leaf.h

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