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[PATCH 08/32] xfs: create a shared header file for format-related inform

To: xfs@xxxxxxxxxxx
Subject: [PATCH 08/32] xfs: create a shared header file for format-related information
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Mon, 30 Sep 2013 13:15:20 +1000
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <1380510944-8571-1-git-send-email-david@xxxxxxxxxxxxx>
References: <1380510944-8571-1-git-send-email-david@xxxxxxxxxxxxx>
All of the buffer operations structures are needed to be exported
for xfs_db, so move them all to a common location rather than
spreading them all over the place. They are verifying the on-disk
format, so while xfs_format.h might be a good place, it is not part
of the on disk format.

Hence we need to create a new header file that we centralise these
related definitions. Start by moving the bffer operations
structures, and then also move all the other definitions that have
crept into xfs_log_format.h and xfs_format.h as there was no other
shared header file to put them in.

Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
---
 include/Makefile           |   1 +
 include/libxfs.h           |   1 +
 include/xfs_ag.h           |   4 -
 include/xfs_alloc.h        |   3 -
 include/xfs_alloc_btree.h  |   2 -
 include/xfs_attr_leaf.h    |   2 -
 include/xfs_attr_remote.h  |   2 -
 include/xfs_bmap_btree.h   |   2 -
 include/xfs_da_btree.h     |   2 -
 include/xfs_format.h       |  10 --
 include/xfs_ialloc.h       |   2 -
 include/xfs_ialloc_btree.h |   2 -
 include/xfs_inode_buf.h    |   2 -
 include/xfs_log_format.h   | 177 --------------------------------
 include/xfs_sb.h           |   3 -
 include/xfs_shared.h       | 244 +++++++++++++++++++++++++++++++++++++++++++++
 16 files changed, 246 insertions(+), 213 deletions(-)
 create mode 100644 include/xfs_shared.h

diff --git a/include/Makefile b/include/Makefile
index 628a087..fd2d61b 100644
--- a/include/Makefile
+++ b/include/Makefile
@@ -38,6 +38,7 @@ QAHFILES = libxfs.h libxlog.h \
        xfs_metadump.h \
        xfs_quota_defs.h \
        xfs_sb.h \
+       xfs_shared.h \
        xfs_trace.h \
        xfs_trans_resv.h \
        xfs_trans_space.h
diff --git a/include/libxfs.h b/include/libxfs.h
index ffd83bf..a5d6388 100644
--- a/include/libxfs.h
+++ b/include/libxfs.h
@@ -37,6 +37,7 @@
 #include <xfs/xfs_fs.h>
 #include <xfs/xfs_arch.h>
 
+#include <xfs/xfs_shared.h>
 #include <xfs/xfs_format.h>
 #include <xfs/xfs_log_format.h>
 #include <xfs/xfs_quota_defs.h>
diff --git a/include/xfs_ag.h b/include/xfs_ag.h
index 1cb740a..3fc1098 100644
--- a/include/xfs_ag.h
+++ b/include/xfs_ag.h
@@ -128,8 +128,6 @@ typedef struct xfs_agf {
 extern int xfs_read_agf(struct xfs_mount *mp, struct xfs_trans *tp,
                        xfs_agnumber_t agno, int flags, struct xfs_buf **bpp);
 
-extern const struct xfs_buf_ops xfs_agf_buf_ops;
-
 /*
  * Size of the unlinked inode hash table in the agi.
  */
@@ -191,8 +189,6 @@ typedef struct xfs_agi {
 extern int xfs_read_agi(struct xfs_mount *mp, struct xfs_trans *tp,
                                xfs_agnumber_t agno, struct xfs_buf **bpp);
 
-extern const struct xfs_buf_ops xfs_agi_buf_ops;
-
 /*
  * The third a.g. block contains the a.g. freelist, an array
  * of block pointers to blocks owned by the allocation btree code.
diff --git a/include/xfs_alloc.h b/include/xfs_alloc.h
index 99d0a61..feacb06 100644
--- a/include/xfs_alloc.h
+++ b/include/xfs_alloc.h
@@ -231,7 +231,4 @@ xfs_alloc_get_rec(
        xfs_extlen_t            *len,   /* output: length of extent */
        int                     *stat); /* output: success/failure */
 
-extern const struct xfs_buf_ops xfs_agf_buf_ops;
-extern const struct xfs_buf_ops xfs_agfl_buf_ops;
-
 #endif /* __XFS_ALLOC_H__ */
diff --git a/include/xfs_alloc_btree.h b/include/xfs_alloc_btree.h
index e3a3f74..72676c3 100644
--- a/include/xfs_alloc_btree.h
+++ b/include/xfs_alloc_btree.h
@@ -95,6 +95,4 @@ extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct 
xfs_mount *,
                xfs_agnumber_t, xfs_btnum_t);
 extern int xfs_allocbt_maxrecs(struct xfs_mount *, int, int);
 
-extern const struct xfs_buf_ops xfs_allocbt_buf_ops;
-
 #endif /* __XFS_ALLOC_BTREE_H__ */
diff --git a/include/xfs_attr_leaf.h b/include/xfs_attr_leaf.h
index c102213..da34e64 100644
--- a/include/xfs_attr_leaf.h
+++ b/include/xfs_attr_leaf.h
@@ -336,6 +336,4 @@ void        xfs_attr3_leaf_hdr_from_disk(struct 
xfs_attr3_icleaf_hdr *to,
 void   xfs_attr3_leaf_hdr_to_disk(struct xfs_attr_leafblock *to,
                                   struct xfs_attr3_icleaf_hdr *from);
 
-extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops;
-
 #endif /* __XFS_ATTR_LEAF_H__ */
diff --git a/include/xfs_attr_remote.h b/include/xfs_attr_remote.h
index 92a8fd7..b3e1e1b 100644
--- a/include/xfs_attr_remote.h
+++ b/include/xfs_attr_remote.h
@@ -45,8 +45,6 @@ struct xfs_attr3_rmt_hdr {
        ((bufsize) - (xfs_sb_version_hascrc(&(mp)->m_sb) ? \
                        sizeof(struct xfs_attr3_rmt_hdr) : 0))
 
-extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops;
-
 int xfs_attr3_rmt_blocks(struct xfs_mount *mp, int attrlen);
 
 int xfs_attr_rmtval_get(struct xfs_da_args *args);
diff --git a/include/xfs_bmap_btree.h b/include/xfs_bmap_btree.h
index 1b726d6..e307978 100644
--- a/include/xfs_bmap_btree.h
+++ b/include/xfs_bmap_btree.h
@@ -239,6 +239,4 @@ extern int xfs_bmbt_maxrecs(struct xfs_mount *, int 
blocklen, int leaf);
 extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *,
                struct xfs_trans *, struct xfs_inode *, int);
 
-extern const struct xfs_buf_ops xfs_bmbt_buf_ops;
-
 #endif /* __XFS_BMAP_BTREE_H__ */
diff --git a/include/xfs_da_btree.h b/include/xfs_da_btree.h
index b1f2679..a762cfa 100644
--- a/include/xfs_da_btree.h
+++ b/include/xfs_da_btree.h
@@ -309,8 +309,6 @@ int xfs_da3_node_read(struct xfs_trans *tp, struct 
xfs_inode *dp,
                         xfs_dablk_t bno, xfs_daddr_t mappedbno,
                         struct xfs_buf **bpp, int which_fork);
 
-extern const struct xfs_buf_ops xfs_da3_node_buf_ops;
-
 /*
  * Utility routines.
  */
diff --git a/include/xfs_format.h b/include/xfs_format.h
index 35c08ff..a790428 100644
--- a/include/xfs_format.h
+++ b/include/xfs_format.h
@@ -156,14 +156,4 @@ struct xfs_dsymlink_hdr {
        ((bufsize) - (xfs_sb_version_hascrc(&(mp)->m_sb) ? \
                        sizeof(struct xfs_dsymlink_hdr) : 0))
 
-int xfs_symlink_blocks(struct xfs_mount *mp, int pathlen);
-int xfs_symlink_hdr_set(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset,
-                       uint32_t size, struct xfs_buf *bp);
-bool xfs_symlink_hdr_ok(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset,
-                       uint32_t size, struct xfs_buf *bp);
-void xfs_symlink_local_to_remote(struct xfs_trans *tp, struct xfs_buf *bp,
-                                struct xfs_inode *ip, struct xfs_ifork *ifp);
-
-extern const struct xfs_buf_ops xfs_symlink_buf_ops;
-
 #endif /* __XFS_FORMAT_H__ */
diff --git a/include/xfs_ialloc.h b/include/xfs_ialloc.h
index 68c0732..1557798 100644
--- a/include/xfs_ialloc.h
+++ b/include/xfs_ialloc.h
@@ -158,6 +158,4 @@ int xfs_ialloc_inode_init(struct xfs_mount *mp, struct 
xfs_trans *tp,
                          xfs_agnumber_t agno, xfs_agblock_t agbno,
                          xfs_agblock_t length, unsigned int gen);
 
-extern const struct xfs_buf_ops xfs_agi_buf_ops;
-
 #endif /* __XFS_IALLOC_H__ */
diff --git a/include/xfs_ialloc_btree.h b/include/xfs_ialloc_btree.h
index 3ac36b7..cfbfe46 100644
--- a/include/xfs_ialloc_btree.h
+++ b/include/xfs_ialloc_btree.h
@@ -110,6 +110,4 @@ extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct 
xfs_mount *,
                struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t);
 extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int);
 
-extern const struct xfs_buf_ops xfs_inobt_buf_ops;
-
 #endif /* __XFS_IALLOC_BTREE_H__ */
diff --git a/include/xfs_inode_buf.h b/include/xfs_inode_buf.h
index aae9fc4..e8fd3bd 100644
--- a/include/xfs_inode_buf.h
+++ b/include/xfs_inode_buf.h
@@ -47,6 +47,4 @@ void          xfs_inobp_check(struct xfs_mount *, struct 
xfs_buf *);
 #define        xfs_inobp_check(mp, bp)
 #endif /* DEBUG */
 
-extern const struct xfs_buf_ops xfs_inode_buf_ops;
-
 #endif /* __XFS_INODE_BUF_H__ */
diff --git a/include/xfs_log_format.h b/include/xfs_log_format.h
index 31e3a06..aeaa715 100644
--- a/include/xfs_log_format.h
+++ b/include/xfs_log_format.h
@@ -234,178 +234,6 @@ typedef struct xfs_trans_header {
        { XFS_LI_ICREATE,       "XFS_LI_ICREATE" }
 
 /*
- * Transaction types.  Used to distinguish types of buffers.
- */
-#define XFS_TRANS_SETATTR_NOT_SIZE     1
-#define XFS_TRANS_SETATTR_SIZE         2
-#define XFS_TRANS_INACTIVE             3
-#define XFS_TRANS_CREATE               4
-#define XFS_TRANS_CREATE_TRUNC         5
-#define XFS_TRANS_TRUNCATE_FILE                6
-#define XFS_TRANS_REMOVE               7
-#define XFS_TRANS_LINK                 8
-#define XFS_TRANS_RENAME               9
-#define XFS_TRANS_MKDIR                        10
-#define XFS_TRANS_RMDIR                        11
-#define XFS_TRANS_SYMLINK              12
-#define XFS_TRANS_SET_DMATTRS          13
-#define XFS_TRANS_GROWFS               14
-#define XFS_TRANS_STRAT_WRITE          15
-#define XFS_TRANS_DIOSTRAT             16
-/* 17 was XFS_TRANS_WRITE_SYNC */
-#define        XFS_TRANS_WRITEID               18
-#define        XFS_TRANS_ADDAFORK              19
-#define        XFS_TRANS_ATTRINVAL             20
-#define        XFS_TRANS_ATRUNCATE             21
-#define        XFS_TRANS_ATTR_SET              22
-#define        XFS_TRANS_ATTR_RM               23
-#define        XFS_TRANS_ATTR_FLAG             24
-#define        XFS_TRANS_CLEAR_AGI_BUCKET      25
-#define XFS_TRANS_QM_SBCHANGE          26
-/*
- * Dummy entries since we use the transaction type to index into the
- * trans_type[] in xlog_recover_print_trans_head()
- */
-#define XFS_TRANS_DUMMY1               27
-#define XFS_TRANS_DUMMY2               28
-#define XFS_TRANS_QM_QUOTAOFF          29
-#define XFS_TRANS_QM_DQALLOC           30
-#define XFS_TRANS_QM_SETQLIM           31
-#define XFS_TRANS_QM_DQCLUSTER         32
-#define XFS_TRANS_QM_QINOCREATE                33
-#define XFS_TRANS_QM_QUOTAOFF_END      34
-#define XFS_TRANS_SB_UNIT              35
-#define XFS_TRANS_FSYNC_TS             36
-#define        XFS_TRANS_GROWFSRT_ALLOC        37
-#define        XFS_TRANS_GROWFSRT_ZERO         38
-#define        XFS_TRANS_GROWFSRT_FREE         39
-#define        XFS_TRANS_SWAPEXT               40
-#define        XFS_TRANS_SB_COUNT              41
-#define        XFS_TRANS_CHECKPOINT            42
-#define        XFS_TRANS_ICREATE               43
-#define        XFS_TRANS_TYPE_MAX              43
-/* new transaction types need to be reflected in xfs_logprint(8) */
-
-#define XFS_TRANS_TYPES \
-       { XFS_TRANS_SETATTR_NOT_SIZE,   "SETATTR_NOT_SIZE" }, \
-       { XFS_TRANS_SETATTR_SIZE,       "SETATTR_SIZE" }, \
-       { XFS_TRANS_INACTIVE,           "INACTIVE" }, \
-       { XFS_TRANS_CREATE,             "CREATE" }, \
-       { XFS_TRANS_CREATE_TRUNC,       "CREATE_TRUNC" }, \
-       { XFS_TRANS_TRUNCATE_FILE,      "TRUNCATE_FILE" }, \
-       { XFS_TRANS_REMOVE,             "REMOVE" }, \
-       { XFS_TRANS_LINK,               "LINK" }, \
-       { XFS_TRANS_RENAME,             "RENAME" }, \
-       { XFS_TRANS_MKDIR,              "MKDIR" }, \
-       { XFS_TRANS_RMDIR,              "RMDIR" }, \
-       { XFS_TRANS_SYMLINK,            "SYMLINK" }, \
-       { XFS_TRANS_SET_DMATTRS,        "SET_DMATTRS" }, \
-       { XFS_TRANS_GROWFS,             "GROWFS" }, \
-       { XFS_TRANS_STRAT_WRITE,        "STRAT_WRITE" }, \
-       { XFS_TRANS_DIOSTRAT,           "DIOSTRAT" }, \
-       { XFS_TRANS_WRITEID,            "WRITEID" }, \
-       { XFS_TRANS_ADDAFORK,           "ADDAFORK" }, \
-       { XFS_TRANS_ATTRINVAL,          "ATTRINVAL" }, \
-       { XFS_TRANS_ATRUNCATE,          "ATRUNCATE" }, \
-       { XFS_TRANS_ATTR_SET,           "ATTR_SET" }, \
-       { XFS_TRANS_ATTR_RM,            "ATTR_RM" }, \
-       { XFS_TRANS_ATTR_FLAG,          "ATTR_FLAG" }, \
-       { XFS_TRANS_CLEAR_AGI_BUCKET,   "CLEAR_AGI_BUCKET" }, \
-       { XFS_TRANS_QM_SBCHANGE,        "QM_SBCHANGE" }, \
-       { XFS_TRANS_QM_QUOTAOFF,        "QM_QUOTAOFF" }, \
-       { XFS_TRANS_QM_DQALLOC,         "QM_DQALLOC" }, \
-       { XFS_TRANS_QM_SETQLIM,         "QM_SETQLIM" }, \
-       { XFS_TRANS_QM_DQCLUSTER,       "QM_DQCLUSTER" }, \
-       { XFS_TRANS_QM_QINOCREATE,      "QM_QINOCREATE" }, \
-       { XFS_TRANS_QM_QUOTAOFF_END,    "QM_QOFF_END" }, \
-       { XFS_TRANS_SB_UNIT,            "SB_UNIT" }, \
-       { XFS_TRANS_FSYNC_TS,           "FSYNC_TS" }, \
-       { XFS_TRANS_GROWFSRT_ALLOC,     "GROWFSRT_ALLOC" }, \
-       { XFS_TRANS_GROWFSRT_ZERO,      "GROWFSRT_ZERO" }, \
-       { XFS_TRANS_GROWFSRT_FREE,      "GROWFSRT_FREE" }, \
-       { XFS_TRANS_SWAPEXT,            "SWAPEXT" }, \
-       { XFS_TRANS_SB_COUNT,           "SB_COUNT" }, \
-       { XFS_TRANS_CHECKPOINT,         "CHECKPOINT" }, \
-       { XFS_TRANS_DUMMY1,             "DUMMY1" }, \
-       { XFS_TRANS_DUMMY2,             "DUMMY2" }, \
-       { XLOG_UNMOUNT_REC_TYPE,        "UNMOUNT" }
-
-/*
- * This structure is used to track log items associated with
- * a transaction.  It points to the log item and keeps some
- * flags to track the state of the log item.  It also tracks
- * the amount of space needed to log the item it describes
- * once we get to commit processing (see xfs_trans_commit()).
- */
-struct xfs_log_item_desc {
-       struct xfs_log_item     *lid_item;
-       struct list_head        lid_trans;
-       unsigned char           lid_flags;
-};
-
-#define XFS_LID_DIRTY          0x1
-
-/*
- * Values for t_flags.
- */
-#define        XFS_TRANS_DIRTY         0x01    /* something needs to be logged 
*/
-#define        XFS_TRANS_SB_DIRTY      0x02    /* superblock is modified */
-#define        XFS_TRANS_PERM_LOG_RES  0x04    /* xact took a permanent log 
res */
-#define        XFS_TRANS_SYNC          0x08    /* make commit synchronous */
-#define XFS_TRANS_DQ_DIRTY     0x10    /* at least one dquot in trx dirty */
-#define XFS_TRANS_RESERVE      0x20    /* OK to use reserved data blocks */
-#define XFS_TRANS_FREEZE_PROT  0x40    /* Transaction has elevated writer
-                                          count in superblock */
-
-/*
- * Values for call flags parameter.
- */
-#define        XFS_TRANS_RELEASE_LOG_RES       0x4
-#define        XFS_TRANS_ABORT                 0x8
-
-/*
- * Field values for xfs_trans_mod_sb.
- */
-#define        XFS_TRANS_SB_ICOUNT             0x00000001
-#define        XFS_TRANS_SB_IFREE              0x00000002
-#define        XFS_TRANS_SB_FDBLOCKS           0x00000004
-#define        XFS_TRANS_SB_RES_FDBLOCKS       0x00000008
-#define        XFS_TRANS_SB_FREXTENTS          0x00000010
-#define        XFS_TRANS_SB_RES_FREXTENTS      0x00000020
-#define        XFS_TRANS_SB_DBLOCKS            0x00000040
-#define        XFS_TRANS_SB_AGCOUNT            0x00000080
-#define        XFS_TRANS_SB_IMAXPCT            0x00000100
-#define        XFS_TRANS_SB_REXTSIZE           0x00000200
-#define        XFS_TRANS_SB_RBMBLOCKS          0x00000400
-#define        XFS_TRANS_SB_RBLOCKS            0x00000800
-#define        XFS_TRANS_SB_REXTENTS           0x00001000
-#define        XFS_TRANS_SB_REXTSLOG           0x00002000
-
-/*
- * Here we centralize the specification of XFS meta-data buffer
- * reference count values.  This determine how hard the buffer
- * cache tries to hold onto the buffer.
- */
-#define        XFS_AGF_REF             4
-#define        XFS_AGI_REF             4
-#define        XFS_AGFL_REF            3
-#define        XFS_INO_BTREE_REF       3
-#define        XFS_ALLOC_BTREE_REF     2
-#define        XFS_BMAP_BTREE_REF      2
-#define        XFS_DIR_BTREE_REF       2
-#define        XFS_INO_REF             2
-#define        XFS_ATTR_BTREE_REF      1
-#define        XFS_DQUOT_REF           1
-
-/*
- * Flags for xfs_trans_ichgtime().
- */
-#define        XFS_ICHGTIME_MOD        0x1     /* data fork modification 
timestamp */
-#define        XFS_ICHGTIME_CHG        0x2     /* inode field change timestamp 
*/
-#define        XFS_ICHGTIME_CREATE     0x4     /* inode create timestamp */
-
-
-/*
  * Inode Log Item Format definitions.
  *
  * This is the structure used to lay out an inode log item in the
@@ -793,7 +621,6 @@ typedef struct xfs_qoff_logformat {
        char                    qf_pad[12];     /* padding for future */
 } xfs_qoff_logformat_t;
 
-
 /*
  * Disk quotas status in m_qflags, and also sb_qflags. 16 bits.
  */
@@ -845,8 +672,4 @@ struct xfs_icreate_log {
        __be32          icl_gen;        /* inode generation number to use */
 };
 
-int    xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes);
-int    xfs_log_calc_minimum_size(struct xfs_mount *);
-
-
 #endif /* __XFS_LOG_FORMAT_H__ */
diff --git a/include/xfs_sb.h b/include/xfs_sb.h
index c8d8898..741b7a3 100644
--- a/include/xfs_sb.h
+++ b/include/xfs_sb.h
@@ -695,7 +695,4 @@ extern void xfs_sb_from_disk(struct xfs_sb *, struct 
xfs_dsb *);
 extern void    xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
 extern void    xfs_sb_quota_from_disk(struct xfs_sb *sbp);
 
-extern const struct xfs_buf_ops xfs_sb_buf_ops;
-extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops;
-
 #endif /* __XFS_SB_H__ */
diff --git a/include/xfs_shared.h b/include/xfs_shared.h
new file mode 100644
index 0000000..63c94b1
--- /dev/null
+++ b/include/xfs_shared.h
@@ -0,0 +1,244 @@
+/*
+ * Copyright (c) 2000-2005 Silicon Graphics, Inc.
+ * Copyright (c) 2013 Red Hat, Inc.
+ * All Rights Reserved.
+ *
+ * This program 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.
+ *
+ * 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.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#ifndef __XFS_SHARED_H__
+#define __XFS_SHARED_H__
+
+/*
+ * Definitions shared between kernel and userspace that don't fit into any 
other
+ * header file that is shared with userspace.
+ */
+struct xfs_ifork;
+struct xfs_buf;
+struct xfs_buf_ops;
+struct xfs_mount;
+struct xfs_trans;
+struct xfs_inode;
+
+/*
+ * Buffer verifier operations are widely used, including userspace tools
+ */
+extern const struct xfs_buf_ops xfs_agf_buf_ops;
+extern const struct xfs_buf_ops xfs_agi_buf_ops;
+extern const struct xfs_buf_ops xfs_agf_buf_ops;
+extern const struct xfs_buf_ops xfs_agfl_buf_ops;
+extern const struct xfs_buf_ops xfs_allocbt_buf_ops;
+extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops;
+extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops;
+extern const struct xfs_buf_ops xfs_bmbt_buf_ops;
+extern const struct xfs_buf_ops xfs_da3_node_buf_ops;
+extern const struct xfs_buf_ops xfs_dquot_buf_ops;
+extern const struct xfs_buf_ops xfs_symlink_buf_ops;
+extern const struct xfs_buf_ops xfs_agi_buf_ops;
+extern const struct xfs_buf_ops xfs_inobt_buf_ops;
+extern const struct xfs_buf_ops xfs_inode_buf_ops;
+extern const struct xfs_buf_ops xfs_inode_buf_ra_ops;
+extern const struct xfs_buf_ops xfs_dquot_buf_ops;
+extern const struct xfs_buf_ops xfs_sb_buf_ops;
+extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops;
+extern const struct xfs_buf_ops xfs_symlink_buf_ops;
+
+/*
+ * Transaction types.  Used to distinguish types of buffers. These never reach
+ * the log.
+ */
+#define XFS_TRANS_SETATTR_NOT_SIZE     1
+#define XFS_TRANS_SETATTR_SIZE         2
+#define XFS_TRANS_INACTIVE             3
+#define XFS_TRANS_CREATE               4
+#define XFS_TRANS_CREATE_TRUNC         5
+#define XFS_TRANS_TRUNCATE_FILE                6
+#define XFS_TRANS_REMOVE               7
+#define XFS_TRANS_LINK                 8
+#define XFS_TRANS_RENAME               9
+#define XFS_TRANS_MKDIR                        10
+#define XFS_TRANS_RMDIR                        11
+#define XFS_TRANS_SYMLINK              12
+#define XFS_TRANS_SET_DMATTRS          13
+#define XFS_TRANS_GROWFS               14
+#define XFS_TRANS_STRAT_WRITE          15
+#define XFS_TRANS_DIOSTRAT             16
+/* 17 was XFS_TRANS_WRITE_SYNC */
+#define        XFS_TRANS_WRITEID               18
+#define        XFS_TRANS_ADDAFORK              19
+#define        XFS_TRANS_ATTRINVAL             20
+#define        XFS_TRANS_ATRUNCATE             21
+#define        XFS_TRANS_ATTR_SET              22
+#define        XFS_TRANS_ATTR_RM               23
+#define        XFS_TRANS_ATTR_FLAG             24
+#define        XFS_TRANS_CLEAR_AGI_BUCKET      25
+#define XFS_TRANS_QM_SBCHANGE          26
+/*
+ * Dummy entries since we use the transaction type to index into the
+ * trans_type[] in xlog_recover_print_trans_head()
+ */
+#define XFS_TRANS_DUMMY1               27
+#define XFS_TRANS_DUMMY2               28
+#define XFS_TRANS_QM_QUOTAOFF          29
+#define XFS_TRANS_QM_DQALLOC           30
+#define XFS_TRANS_QM_SETQLIM           31
+#define XFS_TRANS_QM_DQCLUSTER         32
+#define XFS_TRANS_QM_QINOCREATE                33
+#define XFS_TRANS_QM_QUOTAOFF_END      34
+#define XFS_TRANS_SB_UNIT              35
+#define XFS_TRANS_FSYNC_TS             36
+#define        XFS_TRANS_GROWFSRT_ALLOC        37
+#define        XFS_TRANS_GROWFSRT_ZERO         38
+#define        XFS_TRANS_GROWFSRT_FREE         39
+#define        XFS_TRANS_SWAPEXT               40
+#define        XFS_TRANS_SB_COUNT              41
+#define        XFS_TRANS_CHECKPOINT            42
+#define        XFS_TRANS_ICREATE               43
+#define        XFS_TRANS_TYPE_MAX              43
+/* new transaction types need to be reflected in xfs_logprint(8) */
+
+#define XFS_TRANS_TYPES \
+       { XFS_TRANS_SETATTR_NOT_SIZE,   "SETATTR_NOT_SIZE" }, \
+       { XFS_TRANS_SETATTR_SIZE,       "SETATTR_SIZE" }, \
+       { XFS_TRANS_INACTIVE,           "INACTIVE" }, \
+       { XFS_TRANS_CREATE,             "CREATE" }, \
+       { XFS_TRANS_CREATE_TRUNC,       "CREATE_TRUNC" }, \
+       { XFS_TRANS_TRUNCATE_FILE,      "TRUNCATE_FILE" }, \
+       { XFS_TRANS_REMOVE,             "REMOVE" }, \
+       { XFS_TRANS_LINK,               "LINK" }, \
+       { XFS_TRANS_RENAME,             "RENAME" }, \
+       { XFS_TRANS_MKDIR,              "MKDIR" }, \
+       { XFS_TRANS_RMDIR,              "RMDIR" }, \
+       { XFS_TRANS_SYMLINK,            "SYMLINK" }, \
+       { XFS_TRANS_SET_DMATTRS,        "SET_DMATTRS" }, \
+       { XFS_TRANS_GROWFS,             "GROWFS" }, \
+       { XFS_TRANS_STRAT_WRITE,        "STRAT_WRITE" }, \
+       { XFS_TRANS_DIOSTRAT,           "DIOSTRAT" }, \
+       { XFS_TRANS_WRITEID,            "WRITEID" }, \
+       { XFS_TRANS_ADDAFORK,           "ADDAFORK" }, \
+       { XFS_TRANS_ATTRINVAL,          "ATTRINVAL" }, \
+       { XFS_TRANS_ATRUNCATE,          "ATRUNCATE" }, \
+       { XFS_TRANS_ATTR_SET,           "ATTR_SET" }, \
+       { XFS_TRANS_ATTR_RM,            "ATTR_RM" }, \
+       { XFS_TRANS_ATTR_FLAG,          "ATTR_FLAG" }, \
+       { XFS_TRANS_CLEAR_AGI_BUCKET,   "CLEAR_AGI_BUCKET" }, \
+       { XFS_TRANS_QM_SBCHANGE,        "QM_SBCHANGE" }, \
+       { XFS_TRANS_QM_QUOTAOFF,        "QM_QUOTAOFF" }, \
+       { XFS_TRANS_QM_DQALLOC,         "QM_DQALLOC" }, \
+       { XFS_TRANS_QM_SETQLIM,         "QM_SETQLIM" }, \
+       { XFS_TRANS_QM_DQCLUSTER,       "QM_DQCLUSTER" }, \
+       { XFS_TRANS_QM_QINOCREATE,      "QM_QINOCREATE" }, \
+       { XFS_TRANS_QM_QUOTAOFF_END,    "QM_QOFF_END" }, \
+       { XFS_TRANS_SB_UNIT,            "SB_UNIT" }, \
+       { XFS_TRANS_FSYNC_TS,           "FSYNC_TS" }, \
+       { XFS_TRANS_GROWFSRT_ALLOC,     "GROWFSRT_ALLOC" }, \
+       { XFS_TRANS_GROWFSRT_ZERO,      "GROWFSRT_ZERO" }, \
+       { XFS_TRANS_GROWFSRT_FREE,      "GROWFSRT_FREE" }, \
+       { XFS_TRANS_SWAPEXT,            "SWAPEXT" }, \
+       { XFS_TRANS_SB_COUNT,           "SB_COUNT" }, \
+       { XFS_TRANS_CHECKPOINT,         "CHECKPOINT" }, \
+       { XFS_TRANS_DUMMY1,             "DUMMY1" }, \
+       { XFS_TRANS_DUMMY2,             "DUMMY2" }, \
+       { XLOG_UNMOUNT_REC_TYPE,        "UNMOUNT" }
+
+/*
+ * This structure is used to track log items associated with
+ * a transaction.  It points to the log item and keeps some
+ * flags to track the state of the log item.  It also tracks
+ * the amount of space needed to log the item it describes
+ * once we get to commit processing (see xfs_trans_commit()).
+ */
+struct xfs_log_item_desc {
+       struct xfs_log_item     *lid_item;
+       struct list_head        lid_trans;
+       unsigned char           lid_flags;
+};
+
+#define XFS_LID_DIRTY          0x1
+
+/* log size calculation functions */
+int    xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes);
+int    xfs_log_calc_minimum_size(struct xfs_mount *);
+
+
+/*
+ * Values for t_flags.
+ */
+#define        XFS_TRANS_DIRTY         0x01    /* something needs to be logged 
*/
+#define        XFS_TRANS_SB_DIRTY      0x02    /* superblock is modified */
+#define        XFS_TRANS_PERM_LOG_RES  0x04    /* xact took a permanent log 
res */
+#define        XFS_TRANS_SYNC          0x08    /* make commit synchronous */
+#define XFS_TRANS_DQ_DIRTY     0x10    /* at least one dquot in trx dirty */
+#define XFS_TRANS_RESERVE      0x20    /* OK to use reserved data blocks */
+#define XFS_TRANS_FREEZE_PROT  0x40    /* Transaction has elevated writer
+                                          count in superblock */
+/*
+ * Values for call flags parameter.
+ */
+#define        XFS_TRANS_RELEASE_LOG_RES       0x4
+#define        XFS_TRANS_ABORT                 0x8
+
+/*
+ * Field values for xfs_trans_mod_sb.
+ */
+#define        XFS_TRANS_SB_ICOUNT             0x00000001
+#define        XFS_TRANS_SB_IFREE              0x00000002
+#define        XFS_TRANS_SB_FDBLOCKS           0x00000004
+#define        XFS_TRANS_SB_RES_FDBLOCKS       0x00000008
+#define        XFS_TRANS_SB_FREXTENTS          0x00000010
+#define        XFS_TRANS_SB_RES_FREXTENTS      0x00000020
+#define        XFS_TRANS_SB_DBLOCKS            0x00000040
+#define        XFS_TRANS_SB_AGCOUNT            0x00000080
+#define        XFS_TRANS_SB_IMAXPCT            0x00000100
+#define        XFS_TRANS_SB_REXTSIZE           0x00000200
+#define        XFS_TRANS_SB_RBMBLOCKS          0x00000400
+#define        XFS_TRANS_SB_RBLOCKS            0x00000800
+#define        XFS_TRANS_SB_REXTENTS           0x00001000
+#define        XFS_TRANS_SB_REXTSLOG           0x00002000
+
+/*
+ * Here we centralize the specification of XFS meta-data buffer reference count
+ * values.  This determine how hard the buffer cache tries to hold onto the
+ * buffer.
+ */
+#define        XFS_AGF_REF             4
+#define        XFS_AGI_REF             4
+#define        XFS_AGFL_REF            3
+#define        XFS_INO_BTREE_REF       3
+#define        XFS_ALLOC_BTREE_REF     2
+#define        XFS_BMAP_BTREE_REF      2
+#define        XFS_DIR_BTREE_REF       2
+#define        XFS_INO_REF             2
+#define        XFS_ATTR_BTREE_REF      1
+#define        XFS_DQUOT_REF           1
+
+/*
+ * Flags for xfs_trans_ichgtime().
+ */
+#define        XFS_ICHGTIME_MOD        0x1     /* data fork modification 
timestamp */
+#define        XFS_ICHGTIME_CHG        0x2     /* inode field change timestamp 
*/
+#define        XFS_ICHGTIME_CREATE     0x4     /* inode create timestamp */
+
+
+/*
+ * Symlink decoding/encoding functions
+ */
+int xfs_symlink_blocks(struct xfs_mount *mp, int pathlen);
+int xfs_symlink_hdr_set(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset,
+                       uint32_t size, struct xfs_buf *bp);
+bool xfs_symlink_hdr_ok(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset,
+                       uint32_t size, struct xfs_buf *bp);
+void xfs_symlink_local_to_remote(struct xfs_trans *tp, struct xfs_buf *bp,
+                                struct xfs_inode *ip, struct xfs_ifork *ifp);
+
+#endif /* __XFS_SHARED_H__ */
-- 
1.8.3.2

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