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, 171 insertions, 0 deletions

diff --git a/fs/xfs/xfs_buf_item.h b/fs/xfs/xfs_buf_item.h
new file mode 100644
index 000000000000..5f1b0c9308f6
--- /dev/null
+++ b/fs/xfs/xfs_buf_item.h
@@ -0,0 +1,171 @@
+/*
+ * Copyright (c) 2000-2001 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_BUF_ITEM_H__
+#define __XFS_BUF_ITEM_H__
+
+/*
+ * This is the structure used to lay out a buf log item in the
+ * log.  The data map describes which 128 byte chunks of the buffer
+ * have been logged.  This structure works only on buffers that
+ * reside up to the first TB in the filesystem.  These buffers are
+ * generated only by pre-6.2 systems and are known as XFS_LI_6_1_BUF.
+ */
+typedef struct xfs_buf_log_format_v1 {
+        unsigned short  blf_type;       /* buf log item type indicator */
+        unsigned short  blf_size;       /* size of this item */
+        __int32_t       blf_blkno;      /* starting blkno of this buf */
+        ushort          blf_flags;      /* misc state */
+        ushort          blf_len;        /* number of blocks in this buf */
+        unsigned int    blf_map_size;   /* size of data bitmap in words */
+        unsigned int    blf_data_map[1];/* variable size bitmap of */
+                                        /*   regions of buffer in this item */
+} xfs_buf_log_format_v1_t;
+
+/*
+ * This is a form of the above structure with a 64 bit blkno field.
+ * For 6.2 and beyond, this is XFS_LI_BUF.  We use this to log everything.
+ */
+typedef struct xfs_buf_log_format_t {
+        unsigned short  blf_type;       /* buf log item type indicator */
+        unsigned short  blf_size;       /* size of this item */
+        ushort          blf_flags;      /* misc state */
+        ushort          blf_len;        /* number of blocks in this buf */
+        __int64_t       blf_blkno;      /* starting blkno of this buf */
+        unsigned int    blf_map_size;   /* size of data bitmap in words */
+        unsigned int    blf_data_map[1];/* variable size bitmap of */
+                                        /*   regions of buffer in this item */
+} xfs_buf_log_format_t;
+
+/*
+ * This flag indicates that the buffer contains on disk inodes
+ * and requires special recovery handling.
+ */
+#define XFS_BLI_INODE_BUF       0x1
+/*
+ * This flag indicates that the buffer should not be replayed
+ * during recovery because its blocks are being freed.
+ */
+#define XFS_BLI_CANCEL          0x2
+/*
+ * This flag indicates that the buffer contains on disk
+ * user or group dquots and may require special recovery handling.
+ */
+#define XFS_BLI_UDQUOT_BUF      0x4
+/* #define XFS_BLI_PDQUOT_BUF   0x8 */
+#define XFS_BLI_GDQUOT_BUF      0x10
+
+#define XFS_BLI_CHUNK           128
+#define XFS_BLI_SHIFT           7
+#define BIT_TO_WORD_SHIFT       5
+#define NBWORD                  (NBBY * sizeof(unsigned int))
+
+/*
+ * buf log item flags
+ */
+#define XFS_BLI_HOLD            0x01
+#define XFS_BLI_DIRTY           0x02
+#define XFS_BLI_STALE           0x04
+#define XFS_BLI_LOGGED          0x08
+#define XFS_BLI_INODE_ALLOC_BUF 0x10
+#define XFS_BLI_STALE_INODE     0x20
+
+
+#ifdef __KERNEL__
+
+struct xfs_buf;
+struct ktrace;
+struct xfs_mount;
+struct xfs_buf_log_item;
+
+#if defined(XFS_BLI_TRACE)
+#define XFS_BLI_TRACE_SIZE      32
+
+void    xfs_buf_item_trace(char *, struct xfs_buf_log_item *);
+#else
+#define xfs_buf_item_trace(id, bip)
+#endif
+
+/*
+ * This is the in core log item structure used to track information
+ * needed to log buffers.  It tracks how many times the lock has been
+ * locked, and which 128 byte chunks of the buffer are dirty.
+ */
+typedef struct xfs_buf_log_item {
+        xfs_log_item_t          bli_item;       /* common item structure */
+        struct xfs_buf          *bli_buf;       /* real buffer pointer */
+        unsigned int            bli_flags;      /* misc flags */
+        unsigned int            bli_recur;      /* lock recursion count */
+        atomic_t                bli_refcount;   /* cnt of tp refs */
+#ifdef XFS_BLI_TRACE
+        struct ktrace           *bli_trace;     /* event trace buf */
+#endif
+#ifdef XFS_TRANS_DEBUG
+        char                    *bli_orig;      /* original buffer copy */
+        char                    *bli_logged;    /* bytes logged (bitmap) */
+#endif
+        xfs_buf_log_format_t    bli_format;     /* in-log header */
+} xfs_buf_log_item_t;
+
+/*
+ * This structure is used during recovery to record the buf log
+ * items which have been canceled and should not be replayed.
+ */
+typedef struct xfs_buf_cancel {
+        xfs_daddr_t             bc_blkno;
+        uint                    bc_len;
+        int                     bc_refcount;
+        struct xfs_buf_cancel   *bc_next;
+} xfs_buf_cancel_t;
+
+void    xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *);
+void    xfs_buf_item_relse(struct xfs_buf *);
+void    xfs_buf_item_log(xfs_buf_log_item_t *, uint, uint);
+uint    xfs_buf_item_dirty(xfs_buf_log_item_t *);
+void    xfs_buf_attach_iodone(struct xfs_buf *,
+                              void(*)(struct xfs_buf *, xfs_log_item_t *),
+                              xfs_log_item_t *);
+void    xfs_buf_iodone_callbacks(struct xfs_buf *);
+void    xfs_buf_iodone(struct xfs_buf *, xfs_buf_log_item_t *);
+
+#ifdef XFS_TRANS_DEBUG
+void
+xfs_buf_item_flush_log_debug(
+        struct xfs_buf *bp,
+        uint    first,
+        uint    last);
+#else
+#define xfs_buf_item_flush_log_debug(bp, first, last)
+#endif
+
+#endif  /* __KERNEL__ */
+
+#endif  /* __XFS_BUF_ITEM_H__ */