forked from luck/tmp_suning_uos_patched
6453c65d35
xfs_buf_item_unlock() historically checked the dirty state of the buffer by manually checking the buffer log formats for dirty segments. The introduction of ordered buffers invalidated this check because ordered buffers have dirty bli's but no dirty (logged) segments. The check was updated to accommodate ordered buffers by looking at the bli state first and considering the blf only if the bli is clean. This logic is safe but unnecessary. There is no valid case where the bli is clean yet the blf has dirty segments. The bli is set dirty whenever the blf is logged (via xfs_trans_log_buf()) and the blf is cleared in the only place BLI_DIRTY is cleared (xfs_trans_binval()). Remove the conditional blf dirty checks and replace with an assert that should catch any discrepencies between bli and blf dirty states. Refactor the old blf dirty check into a helper function to be used by the assert. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
/*
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* Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_BUF_ITEM_H__
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#define __XFS_BUF_ITEM_H__
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/* kernel only definitions */
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/* buf log item flags */
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#define XFS_BLI_HOLD 0x01
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#define XFS_BLI_DIRTY 0x02
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#define XFS_BLI_STALE 0x04
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#define XFS_BLI_LOGGED 0x08
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#define XFS_BLI_INODE_ALLOC_BUF 0x10
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#define XFS_BLI_STALE_INODE 0x20
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#define XFS_BLI_INODE_BUF 0x40
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#define XFS_BLI_ORDERED 0x80
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#define XFS_BLI_FLAGS \
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{ XFS_BLI_HOLD, "HOLD" }, \
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{ XFS_BLI_DIRTY, "DIRTY" }, \
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{ XFS_BLI_STALE, "STALE" }, \
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{ XFS_BLI_LOGGED, "LOGGED" }, \
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{ XFS_BLI_INODE_ALLOC_BUF, "INODE_ALLOC" }, \
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{ XFS_BLI_STALE_INODE, "STALE_INODE" }, \
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{ XFS_BLI_INODE_BUF, "INODE_BUF" }, \
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{ XFS_BLI_ORDERED, "ORDERED" }
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struct xfs_buf;
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struct xfs_mount;
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struct xfs_buf_log_item;
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/*
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* This is the in core log item structure used to track information
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* needed to log buffers. It tracks how many times the lock has been
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* locked, and which 128 byte chunks of the buffer are dirty.
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*/
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typedef struct xfs_buf_log_item {
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xfs_log_item_t bli_item; /* common item structure */
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struct xfs_buf *bli_buf; /* real buffer pointer */
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unsigned int bli_flags; /* misc flags */
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unsigned int bli_recur; /* lock recursion count */
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atomic_t bli_refcount; /* cnt of tp refs */
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int bli_format_count; /* count of headers */
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struct xfs_buf_log_format *bli_formats; /* array of in-log header ptrs */
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struct xfs_buf_log_format __bli_format; /* embedded in-log header */
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} xfs_buf_log_item_t;
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int xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *);
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void xfs_buf_item_relse(struct xfs_buf *);
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void xfs_buf_item_log(xfs_buf_log_item_t *, uint, uint);
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bool xfs_buf_item_dirty_format(struct xfs_buf_log_item *);
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void xfs_buf_attach_iodone(struct xfs_buf *,
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void(*)(struct xfs_buf *, xfs_log_item_t *),
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xfs_log_item_t *);
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void xfs_buf_iodone_callbacks(struct xfs_buf *);
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void xfs_buf_iodone(struct xfs_buf *, struct xfs_log_item *);
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bool xfs_buf_resubmit_failed_buffers(struct xfs_buf *,
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struct xfs_log_item *,
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struct list_head *);
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extern kmem_zone_t *xfs_buf_item_zone;
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#endif /* __XFS_BUF_ITEM_H__ */
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