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

Eric Sandeen
2013-10-08T23:37:25Z

On 9/29/13 10:15 PM, Dave Chinner wrote:
> 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@redhat.com>

All lines present & accounted for in new file. ;)

Would be nice to fix:

"* This determine how hard the buffer cache tries to hold onto"

while you're at it, but *shrug*

Reviewed-by: Eric Sandeen <sandeen@redhat.com>

> ---
> 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__ */
>