Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 231 insertions, 0 deletions

diff --git a/fs/xfs/xfs_dir2_data.h b/fs/xfs/xfs_dir2_data.h
new file mode 100644
index 000000000000..3f02294ccff0
--- /dev/null
+++ b/fs/xfs/xfs_dir2_data.h
@@ -0,0 +1,231 @@
+/*
+ * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+#ifndef __XFS_DIR2_DATA_H__
+#define __XFS_DIR2_DATA_H__
+
+/*
+ * Directory format 2, data block structures.
+ */
+
+struct xfs_dabuf;
+struct xfs_da_args;
+struct xfs_inode;
+struct xfs_trans;
+
+/*
+ * Constants.
+ */
+#define XFS_DIR2_DATA_MAGIC     0x58443244      /* XD2D: for multiblock dirs */
+#define XFS_DIR2_DATA_ALIGN_LOG 3               /* i.e., 8 bytes */
+#define XFS_DIR2_DATA_ALIGN     (1 << XFS_DIR2_DATA_ALIGN_LOG)
+#define XFS_DIR2_DATA_FREE_TAG  0xffff
+#define XFS_DIR2_DATA_FD_COUNT  3
+
+/*
+ * Directory address space divided into sections,
+ * spaces separated by 32gb.
+ */
+#define XFS_DIR2_SPACE_SIZE     (1ULL << (32 + XFS_DIR2_DATA_ALIGN_LOG))
+#define XFS_DIR2_DATA_SPACE     0
+#define XFS_DIR2_DATA_OFFSET    (XFS_DIR2_DATA_SPACE * XFS_DIR2_SPACE_SIZE)
+#define XFS_DIR2_DATA_FIRSTDB(mp)       \
+        XFS_DIR2_BYTE_TO_DB(mp, XFS_DIR2_DATA_OFFSET)
+
+/*
+ * Offsets of . and .. in data space (always block 0)
+ */
+#define XFS_DIR2_DATA_DOT_OFFSET        \
+        ((xfs_dir2_data_aoff_t)sizeof(xfs_dir2_data_hdr_t))
+#define XFS_DIR2_DATA_DOTDOT_OFFSET     \
+        (XFS_DIR2_DATA_DOT_OFFSET + XFS_DIR2_DATA_ENTSIZE(1))
+#define XFS_DIR2_DATA_FIRST_OFFSET              \
+        (XFS_DIR2_DATA_DOTDOT_OFFSET + XFS_DIR2_DATA_ENTSIZE(2))
+
+/*
+ * Structures.
+ */
+
+/*
+ * Describe a free area in the data block.
+ * The freespace will be formatted as a xfs_dir2_data_unused_t.
+ */
+typedef struct xfs_dir2_data_free {
+        xfs_dir2_data_off_t     offset;         /* start of freespace */
+        xfs_dir2_data_off_t     length;         /* length of freespace */
+} xfs_dir2_data_free_t;
+
+/*
+ * Header for the data blocks.
+ * Always at the beginning of a directory-sized block.
+ * The code knows that XFS_DIR2_DATA_FD_COUNT is 3.
+ */
+typedef struct xfs_dir2_data_hdr {
+        __uint32_t              magic;          /* XFS_DIR2_DATA_MAGIC */
+                                                /* or XFS_DIR2_BLOCK_MAGIC */
+        xfs_dir2_data_free_t    bestfree[XFS_DIR2_DATA_FD_COUNT];
+} xfs_dir2_data_hdr_t;
+
+/*
+ * Active entry in a data block.  Aligned to 8 bytes.
+ * Tag appears as the last 2 bytes.
+ */
+typedef struct xfs_dir2_data_entry {
+        xfs_ino_t               inumber;        /* inode number */
+        __uint8_t               namelen;        /* name length */
+        __uint8_t               name[1];        /* name bytes, no null */
+                                                /* variable offset */
+        xfs_dir2_data_off_t     tag;            /* starting offset of us */
+} xfs_dir2_data_entry_t;
+
+/*
+ * Unused entry in a data block.  Aligned to 8 bytes.
+ * Tag appears as the last 2 bytes.
+ */
+typedef struct xfs_dir2_data_unused {
+        __uint16_t              freetag;        /* XFS_DIR2_DATA_FREE_TAG */
+        xfs_dir2_data_off_t     length;         /* total free length */
+                                                /* variable offset */
+        xfs_dir2_data_off_t     tag;            /* starting offset of us */
+} xfs_dir2_data_unused_t;
+
+typedef union {
+        xfs_dir2_data_entry_t   entry;
+        xfs_dir2_data_unused_t  unused;
+} xfs_dir2_data_union_t;
+
+/*
+ * Generic data block structure, for xfs_db.
+ */
+typedef struct xfs_dir2_data {
+        xfs_dir2_data_hdr_t     hdr;            /* magic XFS_DIR2_DATA_MAGIC */
+        xfs_dir2_data_union_t   u[1];
+} xfs_dir2_data_t;
+
+/*
+ * Macros.
+ */
+
+/*
+ * Size of a data entry.
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DATA_ENTSIZE)
+int xfs_dir2_data_entsize(int n);
+#define XFS_DIR2_DATA_ENTSIZE(n)        xfs_dir2_data_entsize(n)
+#else
+#define XFS_DIR2_DATA_ENTSIZE(n)        \
+        ((int)(roundup(offsetof(xfs_dir2_data_entry_t, name[0]) + (n) + \
+                 (uint)sizeof(xfs_dir2_data_off_t), XFS_DIR2_DATA_ALIGN)))
+#endif
+
+/*
+ * Pointer to an entry's tag word.
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DATA_ENTRY_TAG_P)
+xfs_dir2_data_off_t *xfs_dir2_data_entry_tag_p(xfs_dir2_data_entry_t *dep);
+#define XFS_DIR2_DATA_ENTRY_TAG_P(dep)  xfs_dir2_data_entry_tag_p(dep)
+#else
+#define XFS_DIR2_DATA_ENTRY_TAG_P(dep)  \
+        ((xfs_dir2_data_off_t *)\
+         ((char *)(dep) + XFS_DIR2_DATA_ENTSIZE((dep)->namelen) - \
+          (uint)sizeof(xfs_dir2_data_off_t)))
+#endif
+
+/*
+ * Pointer to a freespace's tag word.
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DATA_UNUSED_TAG_P)
+xfs_dir2_data_off_t *xfs_dir2_data_unused_tag_p(xfs_dir2_data_unused_t *dup);
+#define XFS_DIR2_DATA_UNUSED_TAG_P(dup) \
+        xfs_dir2_data_unused_tag_p(dup)
+#else
+#define XFS_DIR2_DATA_UNUSED_TAG_P(dup) \
+        ((xfs_dir2_data_off_t *)\
+         ((char *)(dup) + INT_GET((dup)->length, ARCH_CONVERT) \
+                        - (uint)sizeof(xfs_dir2_data_off_t)))
+#endif
+
+/*
+ * Function declarations.
+ */
+
+#ifdef DEBUG
+extern void
+        xfs_dir2_data_check(struct xfs_inode *dp, struct xfs_dabuf *bp);
+#else
+#define xfs_dir2_data_check(dp,bp)
+#endif
+
+extern xfs_dir2_data_free_t *
+        xfs_dir2_data_freefind(xfs_dir2_data_t *d,
+                               xfs_dir2_data_unused_t *dup);
+
+extern xfs_dir2_data_free_t *
+        xfs_dir2_data_freeinsert(xfs_dir2_data_t *d,
+                                 xfs_dir2_data_unused_t *dup, int *loghead);
+
+extern void
+        xfs_dir2_data_freeremove(xfs_dir2_data_t *d,
+                                 xfs_dir2_data_free_t *dfp, int *loghead);
+
+extern void
+        xfs_dir2_data_freescan(struct xfs_mount *mp, xfs_dir2_data_t *d,
+                               int *loghead, char *aendp);
+
+extern int
+        xfs_dir2_data_init(struct xfs_da_args *args, xfs_dir2_db_t blkno,
+                           struct xfs_dabuf **bpp);
+
+extern void
+        xfs_dir2_data_log_entry(struct xfs_trans *tp, struct xfs_dabuf *bp,
+                                xfs_dir2_data_entry_t *dep);
+
+extern void
+        xfs_dir2_data_log_header(struct xfs_trans *tp, struct xfs_dabuf *bp);
+
+extern void
+        xfs_dir2_data_log_unused(struct xfs_trans *tp, struct xfs_dabuf *bp,
+                                 xfs_dir2_data_unused_t *dup);
+
+extern void
+        xfs_dir2_data_make_free(struct xfs_trans *tp, struct xfs_dabuf *bp,
+                                xfs_dir2_data_aoff_t offset,
+                                xfs_dir2_data_aoff_t len, int *needlogp,
+                                int *needscanp);
+
+extern void
+        xfs_dir2_data_use_free(struct xfs_trans *tp, struct xfs_dabuf *bp,
+                               xfs_dir2_data_unused_t *dup,
+                               xfs_dir2_data_aoff_t offset,
+                               xfs_dir2_data_aoff_t len, int *needlogp,
+                               int *needscanp);
+
+#endif  /* __XFS_DIR2_DATA_H__ */