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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:29:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:29:51 +0000 |
commit | 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e (patch) | |
tree | 32451fa3cdd9321fb2591fada9891b2cb70a9cd1 /include/grub/zfs/dnode.h | |
parent | Initial commit. (diff) | |
download | grub2-upstream/2.06.tar.xz grub2-upstream/2.06.zip |
Adding upstream version 2.06.upstream/2.06upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | include/grub/zfs/dnode.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/include/grub/zfs/dnode.h b/include/grub/zfs/dnode.h new file mode 100644 index 0000000..e4993df --- /dev/null +++ b/include/grub/zfs/dnode.h @@ -0,0 +1,74 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. + * + * GRUB is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see <http://www.gnu.org/licenses/>. + */ +/* + * Copyright 2010 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#ifndef _SYS_DNODE_H +#define _SYS_DNODE_H + +#include <grub/zfs/spa.h> + +/* + * Fixed constants. + */ +#define DNODE_SHIFT 9 /* 512 bytes */ +#define DNODE_BLOCK_SHIFT 14 /* 16k */ +#define DNODE_CORE_SIZE 64 /* 64 bytes for dnode sans blkptrs */ + +/* + * 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 DNODES_PER_BLOCK_SHIFT (DNODE_BLOCK_SHIFT - DNODE_SHIFT) +#define DNODES_PER_BLOCK (1ULL << DNODES_PER_BLOCK_SHIFT) + +#define DNODE_FLAG_SPILL_BLKPTR (1<<2) + +#define DN_BONUS(dnp) ((void*)((dnp)->dn_bonus + \ + (((dnp)->dn_nblkptr - 1) * sizeof (blkptr_t)))) + +typedef struct dnode_phys { + grub_uint8_t dn_type; /* dmu_object_type_t */ + grub_uint8_t dn_indblkshift; /* ln2(indirect block size) */ + grub_uint8_t dn_nlevels; /* 1=dn_blkptr->data blocks */ + grub_uint8_t dn_nblkptr; /* length of dn_blkptr */ + grub_uint8_t dn_bonustype; /* type of data in bonus buffer */ + grub_uint8_t dn_checksum; /* ZIO_CHECKSUM type */ + grub_uint8_t dn_compress; /* ZIO_COMPRESS type */ + grub_uint8_t dn_flags; /* DNODE_FLAG_* */ + grub_uint16_t dn_datablkszsec; /* data block size in 512b sectors */ + grub_uint16_t dn_bonuslen; /* length of dn_bonus */ + grub_uint8_t dn_pad2[4]; + + /* accounting is protected by dn_dirty_mtx */ + grub_uint64_t dn_maxblkid; /* largest allocated block ID */ + grub_uint64_t dn_used; /* bytes (or sectors) of disk space */ + + grub_uint64_t dn_pad3[4]; + + blkptr_t dn_blkptr[1]; + grub_uint8_t dn_bonus[DN_MAX_BONUSLEN - sizeof (blkptr_t)]; + blkptr_t dn_spill; +} dnode_phys_t; + +#endif /* _SYS_DNODE_H */ |