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Diffstat (limited to 'module/zfs/include/sys/dnode.h')
| -rw-r--r-- | module/zfs/include/sys/dnode.h | 329 |
1 files changed, 0 insertions, 329 deletions
diff --git a/module/zfs/include/sys/dnode.h b/module/zfs/include/sys/dnode.h deleted file mode 100644 index 9ad4be36b..000000000 --- a/module/zfs/include/sys/dnode.h +++ /dev/null @@ -1,329 +0,0 @@ -/* - * 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. - */ - -#ifndef _SYS_DNODE_H -#define _SYS_DNODE_H - -#include <sys/zfs_context.h> -#include <sys/avl.h> -#include <sys/spa.h> -#include <sys/txg.h> -#include <sys/zio.h> -#include <sys/refcount.h> -#include <sys/dmu_zfetch.h> -#include <sys/zrlock.h> - -#ifdef __cplusplus -extern "C" { -#endif - -/* - * dnode_hold() flags. - */ -#define DNODE_MUST_BE_ALLOCATED 1 -#define DNODE_MUST_BE_FREE 2 - -/* - * dnode_next_offset() flags. - */ -#define DNODE_FIND_HOLE 1 -#define DNODE_FIND_BACKWARDS 2 -#define DNODE_FIND_HAVELOCK 4 - -/* - * Fixed constants. - */ -#define DNODE_SHIFT 9 /* 512 bytes */ -#define DN_MIN_INDBLKSHIFT 10 /* 1k */ -#define DN_MAX_INDBLKSHIFT 14 /* 16k */ -#define DNODE_BLOCK_SHIFT 14 /* 16k */ -#define DNODE_CORE_SIZE 64 /* 64 bytes for dnode sans blkptrs */ -#define DN_MAX_OBJECT_SHIFT 48 /* 256 trillion (zfs_fid_t limit) */ -#define DN_MAX_OFFSET_SHIFT 64 /* 2^64 bytes in a dnode */ - -/* - * dnode id flags - * - * Note: a file will never ever have its - * ids moved from bonus->spill - * and only in a crypto environment would it be on spill - */ -#define DN_ID_CHKED_BONUS 0x1 -#define DN_ID_CHKED_SPILL 0x2 -#define DN_ID_OLD_EXIST 0x4 -#define DN_ID_NEW_EXIST 0x8 - -/* - * Derived constants. - */ -#define DNODE_SIZE (1 << DNODE_SHIFT) -#define DN_MAX_NBLKPTR ((DNODE_SIZE - DNODE_CORE_SIZE) >> SPA_BLKPTRSHIFT) -#define DN_MAX_BONUSLEN (DNODE_SIZE - DNODE_CORE_SIZE - (1 << SPA_BLKPTRSHIFT)) -#define DN_MAX_OBJECT (1ULL << DN_MAX_OBJECT_SHIFT) -#define DN_ZERO_BONUSLEN (DN_MAX_BONUSLEN + 1) -#define DN_KILL_SPILLBLK (1) - -#define DNODES_PER_BLOCK_SHIFT (DNODE_BLOCK_SHIFT - DNODE_SHIFT) -#define DNODES_PER_BLOCK (1ULL << DNODES_PER_BLOCK_SHIFT) -#define DNODES_PER_LEVEL_SHIFT (DN_MAX_INDBLKSHIFT - SPA_BLKPTRSHIFT) -#define DNODES_PER_LEVEL (1ULL << DNODES_PER_LEVEL_SHIFT) - -/* The +2 here is a cheesy way to round up */ -#define DN_MAX_LEVELS (2 + ((DN_MAX_OFFSET_SHIFT - SPA_MINBLOCKSHIFT) / \ - (DN_MIN_INDBLKSHIFT - SPA_BLKPTRSHIFT))) - -#define DN_BONUS(dnp) ((void*)((dnp)->dn_bonus + \ - (((dnp)->dn_nblkptr - 1) * sizeof (blkptr_t)))) - -#define DN_USED_BYTES(dnp) (((dnp)->dn_flags & DNODE_FLAG_USED_BYTES) ? \ - (dnp)->dn_used : (dnp)->dn_used << SPA_MINBLOCKSHIFT) - -#define EPB(blkshift, typeshift) (1 << (blkshift - typeshift)) - -struct dmu_buf_impl; -struct objset; -struct zio; - -enum dnode_dirtycontext { - DN_UNDIRTIED, - DN_DIRTY_OPEN, - DN_DIRTY_SYNC -}; - -/* Is dn_used in bytes? if not, it's in multiples of SPA_MINBLOCKSIZE */ -#define DNODE_FLAG_USED_BYTES (1<<0) -#define DNODE_FLAG_USERUSED_ACCOUNTED (1<<1) - -/* Does dnode have a SA spill blkptr in bonus? */ -#define DNODE_FLAG_SPILL_BLKPTR (1<<2) - -typedef struct dnode_phys { - uint8_t dn_type; /* dmu_object_type_t */ - uint8_t dn_indblkshift; /* ln2(indirect block size) */ - uint8_t dn_nlevels; /* 1=dn_blkptr->data blocks */ - uint8_t dn_nblkptr; /* length of dn_blkptr */ - uint8_t dn_bonustype; /* type of data in bonus buffer */ - uint8_t dn_checksum; /* ZIO_CHECKSUM type */ - uint8_t dn_compress; /* ZIO_COMPRESS type */ - uint8_t dn_flags; /* DNODE_FLAG_* */ - uint16_t dn_datablkszsec; /* data block size in 512b sectors */ - uint16_t dn_bonuslen; /* length of dn_bonus */ - uint8_t dn_pad2[4]; - - /* accounting is protected by dn_dirty_mtx */ - uint64_t dn_maxblkid; /* largest allocated block ID */ - uint64_t dn_used; /* bytes (or sectors) of disk space */ - - uint64_t dn_pad3[4]; - - blkptr_t dn_blkptr[1]; - uint8_t dn_bonus[DN_MAX_BONUSLEN - sizeof (blkptr_t)]; - blkptr_t dn_spill; -} dnode_phys_t; - -typedef struct dnode { - /* - * dn_struct_rwlock protects the structure of the dnode, - * including the number of levels of indirection (dn_nlevels), - * dn_maxblkid, and dn_next_* - */ - krwlock_t dn_struct_rwlock; - - /* Our link on dn_objset->os_dnodes list; protected by os_lock. */ - list_node_t dn_link; - - /* immutable: */ - struct objset *dn_objset; - uint64_t dn_object; - struct dmu_buf_impl *dn_dbuf; - struct dnode_handle *dn_handle; - dnode_phys_t *dn_phys; /* pointer into dn->dn_dbuf->db.db_data */ - - /* - * Copies of stuff in dn_phys. They're valid in the open - * context (eg. even before the dnode is first synced). - * Where necessary, these are protected by dn_struct_rwlock. - */ - dmu_object_type_t dn_type; /* object type */ - uint16_t dn_bonuslen; /* bonus length */ - uint8_t dn_bonustype; /* bonus type */ - uint8_t dn_nblkptr; /* number of blkptrs (immutable) */ - uint8_t dn_checksum; /* ZIO_CHECKSUM type */ - uint8_t dn_compress; /* ZIO_COMPRESS type */ - uint8_t dn_nlevels; - uint8_t dn_indblkshift; - uint8_t dn_datablkshift; /* zero if blksz not power of 2! */ - uint8_t dn_moved; /* Has this dnode been moved? */ - uint16_t dn_datablkszsec; /* in 512b sectors */ - uint32_t dn_datablksz; /* in bytes */ - uint64_t dn_maxblkid; - uint8_t dn_next_nblkptr[TXG_SIZE]; - uint8_t dn_next_nlevels[TXG_SIZE]; - uint8_t dn_next_indblkshift[TXG_SIZE]; - uint8_t dn_next_bonustype[TXG_SIZE]; - uint8_t dn_rm_spillblk[TXG_SIZE]; /* for removing spill blk */ - uint16_t dn_next_bonuslen[TXG_SIZE]; - uint32_t dn_next_blksz[TXG_SIZE]; /* next block size in bytes */ - - /* protected by dn_dbufs_mtx; declared here to fill 32-bit hole */ - uint32_t dn_dbufs_count; /* count of dn_dbufs */ - - /* protected by os_lock: */ - list_node_t dn_dirty_link[TXG_SIZE]; /* next on dataset's dirty */ - - /* protected by dn_mtx: */ - kmutex_t dn_mtx; - list_t dn_dirty_records[TXG_SIZE]; - avl_tree_t dn_ranges[TXG_SIZE]; - uint64_t dn_allocated_txg; - uint64_t dn_free_txg; - uint64_t dn_assigned_txg; - kcondvar_t dn_notxholds; - enum dnode_dirtycontext dn_dirtyctx; - uint8_t *dn_dirtyctx_firstset; /* dbg: contents meaningless */ - - /* protected by own devices */ - refcount_t dn_tx_holds; - refcount_t dn_holds; - - kmutex_t dn_dbufs_mtx; - list_t dn_dbufs; /* descendent dbufs */ - - /* protected by dn_struct_rwlock */ - struct dmu_buf_impl *dn_bonus; /* bonus buffer dbuf */ - - boolean_t dn_have_spill; /* have spill or are spilling */ - - /* parent IO for current sync write */ - zio_t *dn_zio; - - /* used in syncing context */ - uint64_t dn_oldused; /* old phys used bytes */ - uint64_t dn_oldflags; /* old phys dn_flags */ - uint64_t dn_olduid, dn_oldgid; - uint64_t dn_newuid, dn_newgid; - int dn_id_flags; - - /* holds prefetch structure */ - struct zfetch dn_zfetch; -} dnode_t; - -/* - * Adds a level of indirection between the dbuf and the dnode to avoid - * iterating descendent dbufs in dnode_move(). Handles are not allocated - * individually, but as an array of child dnodes in dnode_hold_impl(). - */ -typedef struct dnode_handle { - /* Protects dnh_dnode from modification by dnode_move(). */ - zrlock_t dnh_zrlock; - dnode_t *dnh_dnode; -} dnode_handle_t; - -typedef struct dnode_children { - size_t dnc_count; /* number of children */ - dnode_handle_t dnc_children[1]; /* sized dynamically */ -} dnode_children_t; - -typedef struct free_range { - avl_node_t fr_node; - uint64_t fr_blkid; - uint64_t fr_nblks; -} free_range_t; - -dnode_t *dnode_special_open(struct objset *dd, dnode_phys_t *dnp, - uint64_t object, dnode_handle_t *dnh); -void dnode_special_close(dnode_handle_t *dnh); - -void dnode_setbonuslen(dnode_t *dn, int newsize, dmu_tx_t *tx); -void dnode_setbonus_type(dnode_t *dn, dmu_object_type_t, dmu_tx_t *tx); -void dnode_rm_spill(dnode_t *dn, dmu_tx_t *tx); - -int dnode_hold(struct objset *dd, uint64_t object, - void *ref, dnode_t **dnp); -int dnode_hold_impl(struct objset *dd, uint64_t object, int flag, - void *ref, dnode_t **dnp); -boolean_t dnode_add_ref(dnode_t *dn, void *ref); -void dnode_rele(dnode_t *dn, void *ref); -void dnode_setdirty(dnode_t *dn, dmu_tx_t *tx); -void dnode_sync(dnode_t *dn, dmu_tx_t *tx); -void dnode_allocate(dnode_t *dn, dmu_object_type_t ot, int blocksize, int ibs, - dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx); -void dnode_reallocate(dnode_t *dn, dmu_object_type_t ot, int blocksize, - dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx); -void dnode_free(dnode_t *dn, dmu_tx_t *tx); -void dnode_byteswap(dnode_phys_t *dnp); -void dnode_buf_byteswap(void *buf, size_t size); -void dnode_verify(dnode_t *dn); -int dnode_set_blksz(dnode_t *dn, uint64_t size, int ibs, dmu_tx_t *tx); -uint64_t dnode_current_max_length(dnode_t *dn); -void dnode_free_range(dnode_t *dn, uint64_t off, uint64_t len, dmu_tx_t *tx); -void dnode_clear_range(dnode_t *dn, uint64_t blkid, - uint64_t nblks, dmu_tx_t *tx); -void dnode_diduse_space(dnode_t *dn, int64_t space); -void dnode_willuse_space(dnode_t *dn, int64_t space, dmu_tx_t *tx); -void dnode_new_blkid(dnode_t *dn, uint64_t blkid, dmu_tx_t *tx, boolean_t); -uint64_t dnode_block_freed(dnode_t *dn, uint64_t blkid); -void dnode_init(void); -void dnode_fini(void); -int dnode_next_offset(dnode_t *dn, int flags, uint64_t *off, - int minlvl, uint64_t blkfill, uint64_t txg); -void dnode_evict_dbufs(dnode_t *dn); - -#ifdef ZFS_DEBUG - -/* - * There should be a ## between the string literal and fmt, to make it - * clear that we're joining two strings together, but that piece of shit - * gcc doesn't support that preprocessor token. - */ -#define dprintf_dnode(dn, fmt, ...) do { \ - if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ - char __db_buf[32]; \ - uint64_t __db_obj = (dn)->dn_object; \ - if (__db_obj == DMU_META_DNODE_OBJECT) \ - (void) strcpy(__db_buf, "mdn"); \ - else \ - (void) snprintf(__db_buf, sizeof (__db_buf), "%lld", \ - (u_longlong_t)__db_obj);\ - dprintf_ds((dn)->dn_objset->os_dsl_dataset, "obj=%s " fmt, \ - __db_buf, __VA_ARGS__); \ - } \ -_NOTE(CONSTCOND) } while (0) - -#define DNODE_VERIFY(dn) dnode_verify(dn) -#define FREE_VERIFY(db, start, end, tx) free_verify(db, start, end, tx) - -#else - -#define dprintf_dnode(db, fmt, ...) -#define DNODE_VERIFY(dn) -#define FREE_VERIFY(db, start, end, tx) - -#endif - -#ifdef __cplusplus -} -#endif - -#endif /* _SYS_DNODE_H */ |