Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / include / zfs / zap_impl.h

diff --git a/qemu/roms/u-boot/include/zfs/zap_impl.h b/qemu/roms/u-boot/include/zfs/zap_impl.h
new file mode 100644 (file)
index 0000000..431fd2d
--- /dev/null
+++ b/qemu/roms/u-boot/include/zfs/zap_impl.h
@@ -0,0 +1,99 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+/*
+ * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef        _SYS_ZAP_IMPL_H
+#define        _SYS_ZAP_IMPL_H
+
+#define        ZAP_MAGIC 0x2F52AB2ABULL
+
+#define        ZAP_HASHBITS            28
+#define        MZAP_ENT_LEN            64
+#define        MZAP_NAME_LEN           (MZAP_ENT_LEN - 8 - 4 - 2)
+#define        MZAP_MAX_BLKSHIFT       SPA_MAXBLOCKSHIFT
+#define        MZAP_MAX_BLKSZ          (1 << MZAP_MAX_BLKSHIFT)
+
+typedef struct mzap_ent_phys {
+       uint64_t mze_value;
+       uint32_t mze_cd;
+       uint16_t mze_pad;       /* in case we want to chain them someday */
+       char mze_name[MZAP_NAME_LEN];
+} mzap_ent_phys_t;
+
+typedef struct mzap_phys {
+       uint64_t mz_block_type; /* ZBT_MICRO */
+       uint64_t mz_salt;
+       uint64_t mz_pad[6];
+       mzap_ent_phys_t mz_chunk[1];
+       /* actually variable size depending on block size */
+} mzap_phys_t;
+
+/*
+ * The (fat) zap is stored in one object. It is an array of
+ * 1<<FZAP_BLOCK_SHIFT byte blocks. The layout looks like one of:
+ *
+ * ptrtbl fits in first block:
+ *     [zap_phys_t zap_ptrtbl_shift < 6] [zap_leaf_t] ...
+ *
+ * ptrtbl too big for first block:
+ *     [zap_phys_t zap_ptrtbl_shift >= 6] [zap_leaf_t] [ptrtbl] ...
+ *
+ */
+
+#define        ZBT_LEAF                ((1ULL << 63) + 0)
+#define        ZBT_HEADER              ((1ULL << 63) + 1)
+#define        ZBT_MICRO               ((1ULL << 63) + 3)
+/* any other values are ptrtbl blocks */
+
+/*
+ * the embedded pointer table takes up half a block:
+ * block size / entry size (2^3) / 2
+ */
+#define        ZAP_EMBEDDED_PTRTBL_SHIFT(zap) (FZAP_BLOCK_SHIFT(zap) - 3 - 1)
+
+/*
+ * The embedded pointer table starts half-way through the block.  Since
+ * the pointer table itself is half the block, it starts at (64-bit)
+ * word number (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)).
+ */
+#define        ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) \
+       ((uint64_t *)(zap)->zap_f.zap_phys) \
+       [(idx) + (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap))]
+
+/*
+ * TAKE NOTE:
+ * If zap_phys_t is modified, zap_byteswap() must be modified.
+ */
+typedef struct zap_phys {
+       uint64_t zap_block_type;        /* ZBT_HEADER */
+       uint64_t zap_magic;             /* ZAP_MAGIC */
+
+       struct zap_table_phys {
+               uint64_t zt_blk;        /* starting block number */
+               uint64_t zt_numblks;    /* number of blocks */
+               uint64_t zt_shift;      /* bits to index it */
+               uint64_t zt_nextblk;    /* next (larger) copy start block */
+               uint64_t zt_blks_copied; /* number source blocks copied */
+       } zap_ptrtbl;
+
+       uint64_t zap_freeblk;           /* the next free block */
+       uint64_t zap_num_leafs;         /* number of leafs */
+       uint64_t zap_num_entries;       /* number of entries */
+       uint64_t zap_salt;              /* salt to stir into hash function */
+       uint64_t zap_normflags;         /* flags for u8_textprep_str() */
+       uint64_t zap_flags;             /* zap_flag_t */
+       /*
+        * This structure is followed by padding, and then the embedded
+        * pointer table.  The embedded pointer table takes up second
+        * half of the block.  It is accessed using the
+        * ZAP_EMBEDDED_PTRTBL_ENT() macro.
+        */
+} zap_phys_t;
+
+#endif /* _SYS_ZAP_IMPL_H */