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By splitting the b_fspriv field into two different fields (b_log_item and b_li_list). It's possible to get rid of an old ABI workaround, by using the new b_log_item field to store xfs_buf_log_item separated from the log items attached to the buffer, which will be linked in the new b_li_list field. This way, there is no more need to reorder the log items list to place the buf_log_item at the beginning of the list, simplifying a bit the logic to handle buffer IO. This also opens the possibility to change buffer's log items list into a proper list_head. b_log_item field is still defined as a void *, because it is still used by the log buffers to store xlog_in_core structures, and there is no need to add an extra field on xfs_buf just for xlog_in_core. Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com> Reviewed-by: Bill O'Donnell <billodo@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> [darrick: minor style changes] Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
833 lines
23 KiB
C
833 lines
23 KiB
C
/*
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* Copyright (c) 2000-2002,2005 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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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_shared.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_mount.h"
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#include "xfs_inode.h"
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#include "xfs_trans.h"
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#include "xfs_buf_item.h"
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#include "xfs_trans_priv.h"
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#include "xfs_error.h"
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#include "xfs_trace.h"
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/*
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* Check to see if a buffer matching the given parameters is already
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* a part of the given transaction.
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*/
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STATIC struct xfs_buf *
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xfs_trans_buf_item_match(
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struct xfs_trans *tp,
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struct xfs_buftarg *target,
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struct xfs_buf_map *map,
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int nmaps)
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{
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struct xfs_log_item_desc *lidp;
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struct xfs_buf_log_item *blip;
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int len = 0;
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int i;
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for (i = 0; i < nmaps; i++)
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len += map[i].bm_len;
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list_for_each_entry(lidp, &tp->t_items, lid_trans) {
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blip = (struct xfs_buf_log_item *)lidp->lid_item;
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if (blip->bli_item.li_type == XFS_LI_BUF &&
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blip->bli_buf->b_target == target &&
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XFS_BUF_ADDR(blip->bli_buf) == map[0].bm_bn &&
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blip->bli_buf->b_length == len) {
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ASSERT(blip->bli_buf->b_map_count == nmaps);
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return blip->bli_buf;
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}
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}
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return NULL;
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}
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/*
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* Add the locked buffer to the transaction.
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*
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* The buffer must be locked, and it cannot be associated with any
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* transaction.
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*
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* If the buffer does not yet have a buf log item associated with it,
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* then allocate one for it. Then add the buf item to the transaction.
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*/
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STATIC void
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_xfs_trans_bjoin(
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struct xfs_trans *tp,
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struct xfs_buf *bp,
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int reset_recur)
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{
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struct xfs_buf_log_item *bip;
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ASSERT(bp->b_transp == NULL);
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/*
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* The xfs_buf_log_item pointer is stored in b_log_item. If
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* it doesn't have one yet, then allocate one and initialize it.
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* The checks to see if one is there are in xfs_buf_item_init().
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*/
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xfs_buf_item_init(bp, tp->t_mountp);
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bip = bp->b_log_item;
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ASSERT(!(bip->bli_flags & XFS_BLI_STALE));
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ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL));
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ASSERT(!(bip->bli_flags & XFS_BLI_LOGGED));
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if (reset_recur)
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bip->bli_recur = 0;
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/*
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* Take a reference for this transaction on the buf item.
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*/
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atomic_inc(&bip->bli_refcount);
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/*
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* Get a log_item_desc to point at the new item.
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*/
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xfs_trans_add_item(tp, &bip->bli_item);
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/*
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* Initialize b_fsprivate2 so we can find it with incore_match()
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* in xfs_trans_get_buf() and friends above.
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*/
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bp->b_transp = tp;
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}
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void
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xfs_trans_bjoin(
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struct xfs_trans *tp,
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struct xfs_buf *bp)
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{
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_xfs_trans_bjoin(tp, bp, 0);
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trace_xfs_trans_bjoin(bp->b_log_item);
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}
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/*
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* Get and lock the buffer for the caller if it is not already
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* locked within the given transaction. If it is already locked
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* within the transaction, just increment its lock recursion count
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* and return a pointer to it.
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*
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* If the transaction pointer is NULL, make this just a normal
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* get_buf() call.
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*/
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struct xfs_buf *
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xfs_trans_get_buf_map(
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struct xfs_trans *tp,
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struct xfs_buftarg *target,
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struct xfs_buf_map *map,
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int nmaps,
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xfs_buf_flags_t flags)
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{
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xfs_buf_t *bp;
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struct xfs_buf_log_item *bip;
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if (!tp)
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return xfs_buf_get_map(target, map, nmaps, flags);
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/*
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* If we find the buffer in the cache with this transaction
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* pointer in its b_fsprivate2 field, then we know we already
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* have it locked. In this case we just increment the lock
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* recursion count and return the buffer to the caller.
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*/
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bp = xfs_trans_buf_item_match(tp, target, map, nmaps);
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if (bp != NULL) {
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ASSERT(xfs_buf_islocked(bp));
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if (XFS_FORCED_SHUTDOWN(tp->t_mountp)) {
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xfs_buf_stale(bp);
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bp->b_flags |= XBF_DONE;
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}
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ASSERT(bp->b_transp == tp);
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bip = bp->b_log_item;
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ASSERT(bip != NULL);
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ASSERT(atomic_read(&bip->bli_refcount) > 0);
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bip->bli_recur++;
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trace_xfs_trans_get_buf_recur(bip);
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return bp;
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}
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bp = xfs_buf_get_map(target, map, nmaps, flags);
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if (bp == NULL) {
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return NULL;
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}
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ASSERT(!bp->b_error);
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_xfs_trans_bjoin(tp, bp, 1);
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trace_xfs_trans_get_buf(bp->b_log_item);
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return bp;
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}
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/*
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* Get and lock the superblock buffer of this file system for the
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* given transaction.
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*
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* We don't need to use incore_match() here, because the superblock
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* buffer is a private buffer which we keep a pointer to in the
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* mount structure.
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*/
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xfs_buf_t *
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xfs_trans_getsb(
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xfs_trans_t *tp,
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struct xfs_mount *mp,
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int flags)
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{
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xfs_buf_t *bp;
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struct xfs_buf_log_item *bip;
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/*
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* Default to just trying to lock the superblock buffer
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* if tp is NULL.
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*/
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if (tp == NULL)
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return xfs_getsb(mp, flags);
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/*
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* If the superblock buffer already has this transaction
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* pointer in its b_fsprivate2 field, then we know we already
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* have it locked. In this case we just increment the lock
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* recursion count and return the buffer to the caller.
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*/
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bp = mp->m_sb_bp;
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if (bp->b_transp == tp) {
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bip = bp->b_log_item;
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ASSERT(bip != NULL);
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ASSERT(atomic_read(&bip->bli_refcount) > 0);
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bip->bli_recur++;
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trace_xfs_trans_getsb_recur(bip);
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return bp;
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}
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bp = xfs_getsb(mp, flags);
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if (bp == NULL)
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return NULL;
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_xfs_trans_bjoin(tp, bp, 1);
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trace_xfs_trans_getsb(bp->b_log_item);
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return bp;
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}
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/*
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* Get and lock the buffer for the caller if it is not already
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* locked within the given transaction. If it has not yet been
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* read in, read it from disk. If it is already locked
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* within the transaction and already read in, just increment its
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* lock recursion count and return a pointer to it.
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*
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* If the transaction pointer is NULL, make this just a normal
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* read_buf() call.
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*/
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int
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xfs_trans_read_buf_map(
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struct xfs_mount *mp,
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struct xfs_trans *tp,
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struct xfs_buftarg *target,
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struct xfs_buf_map *map,
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int nmaps,
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xfs_buf_flags_t flags,
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struct xfs_buf **bpp,
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const struct xfs_buf_ops *ops)
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{
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struct xfs_buf *bp = NULL;
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struct xfs_buf_log_item *bip;
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int error;
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*bpp = NULL;
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/*
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* If we find the buffer in the cache with this transaction
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* pointer in its b_fsprivate2 field, then we know we already
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* have it locked. If it is already read in we just increment
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* the lock recursion count and return the buffer to the caller.
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* If the buffer is not yet read in, then we read it in, increment
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* the lock recursion count, and return it to the caller.
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*/
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if (tp)
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bp = xfs_trans_buf_item_match(tp, target, map, nmaps);
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if (bp) {
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ASSERT(xfs_buf_islocked(bp));
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ASSERT(bp->b_transp == tp);
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ASSERT(bp->b_log_item != NULL);
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ASSERT(!bp->b_error);
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ASSERT(bp->b_flags & XBF_DONE);
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/*
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* We never locked this buf ourselves, so we shouldn't
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* brelse it either. Just get out.
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*/
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if (XFS_FORCED_SHUTDOWN(mp)) {
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trace_xfs_trans_read_buf_shut(bp, _RET_IP_);
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return -EIO;
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}
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bip = bp->b_log_item;
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bip->bli_recur++;
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ASSERT(atomic_read(&bip->bli_refcount) > 0);
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trace_xfs_trans_read_buf_recur(bip);
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*bpp = bp;
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return 0;
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}
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bp = xfs_buf_read_map(target, map, nmaps, flags, ops);
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if (!bp) {
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if (!(flags & XBF_TRYLOCK))
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return -ENOMEM;
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return tp ? 0 : -EAGAIN;
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}
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/*
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* If we've had a read error, then the contents of the buffer are
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* invalid and should not be used. To ensure that a followup read tries
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* to pull the buffer from disk again, we clear the XBF_DONE flag and
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* mark the buffer stale. This ensures that anyone who has a current
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* reference to the buffer will interpret it's contents correctly and
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* future cache lookups will also treat it as an empty, uninitialised
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* buffer.
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*/
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if (bp->b_error) {
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error = bp->b_error;
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if (!XFS_FORCED_SHUTDOWN(mp))
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xfs_buf_ioerror_alert(bp, __func__);
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bp->b_flags &= ~XBF_DONE;
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xfs_buf_stale(bp);
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if (tp && (tp->t_flags & XFS_TRANS_DIRTY))
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xfs_force_shutdown(tp->t_mountp, SHUTDOWN_META_IO_ERROR);
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xfs_buf_relse(bp);
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/* bad CRC means corrupted metadata */
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if (error == -EFSBADCRC)
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error = -EFSCORRUPTED;
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return error;
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}
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if (XFS_FORCED_SHUTDOWN(mp)) {
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xfs_buf_relse(bp);
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trace_xfs_trans_read_buf_shut(bp, _RET_IP_);
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return -EIO;
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}
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if (tp) {
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_xfs_trans_bjoin(tp, bp, 1);
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trace_xfs_trans_read_buf(bp->b_log_item);
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}
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*bpp = bp;
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return 0;
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}
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/*
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* Release the buffer bp which was previously acquired with one of the
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* xfs_trans_... buffer allocation routines if the buffer has not
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* been modified within this transaction. If the buffer is modified
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* within this transaction, do decrement the recursion count but do
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* not release the buffer even if the count goes to 0. If the buffer is not
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* modified within the transaction, decrement the recursion count and
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* release the buffer if the recursion count goes to 0.
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*
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* If the buffer is to be released and it was not modified before
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* this transaction began, then free the buf_log_item associated with it.
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*
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* If the transaction pointer is NULL, make this just a normal
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* brelse() call.
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*/
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void
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xfs_trans_brelse(
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xfs_trans_t *tp,
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xfs_buf_t *bp)
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{
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struct xfs_buf_log_item *bip;
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int freed;
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/*
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* Default to a normal brelse() call if the tp is NULL.
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*/
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if (tp == NULL) {
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ASSERT(bp->b_transp == NULL);
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xfs_buf_relse(bp);
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return;
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}
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ASSERT(bp->b_transp == tp);
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bip = bp->b_log_item;
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ASSERT(bip->bli_item.li_type == XFS_LI_BUF);
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ASSERT(!(bip->bli_flags & XFS_BLI_STALE));
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ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL));
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ASSERT(atomic_read(&bip->bli_refcount) > 0);
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trace_xfs_trans_brelse(bip);
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/*
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* If the release is just for a recursive lock,
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* then decrement the count and return.
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*/
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if (bip->bli_recur > 0) {
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bip->bli_recur--;
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return;
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}
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/*
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* If the buffer is dirty within this transaction, we can't
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* release it until we commit.
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*/
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if (bip->bli_item.li_desc->lid_flags & XFS_LID_DIRTY)
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return;
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/*
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* If the buffer has been invalidated, then we can't release
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* it until the transaction commits to disk unless it is re-dirtied
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* as part of this transaction. This prevents us from pulling
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* the item from the AIL before we should.
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*/
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if (bip->bli_flags & XFS_BLI_STALE)
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return;
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ASSERT(!(bip->bli_flags & XFS_BLI_LOGGED));
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/*
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* Free up the log item descriptor tracking the released item.
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*/
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xfs_trans_del_item(&bip->bli_item);
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/*
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* Clear the hold flag in the buf log item if it is set.
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* We wouldn't want the next user of the buffer to
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* get confused.
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*/
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if (bip->bli_flags & XFS_BLI_HOLD) {
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bip->bli_flags &= ~XFS_BLI_HOLD;
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}
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/*
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* Drop our reference to the buf log item.
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*/
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freed = atomic_dec_and_test(&bip->bli_refcount);
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/*
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* If the buf item is not tracking data in the log, then we must free it
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* before releasing the buffer back to the free pool.
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*
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* If the fs has shutdown and we dropped the last reference, it may fall
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* on us to release a (possibly dirty) bli if it never made it to the
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* AIL (e.g., the aborted unpin already happened and didn't release it
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* due to our reference). Since we're already shutdown and need xa_lock,
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* just force remove from the AIL and release the bli here.
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*/
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if (XFS_FORCED_SHUTDOWN(tp->t_mountp) && freed) {
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xfs_trans_ail_remove(&bip->bli_item, SHUTDOWN_LOG_IO_ERROR);
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xfs_buf_item_relse(bp);
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} else if (!(bip->bli_flags & XFS_BLI_DIRTY)) {
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/***
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ASSERT(bp->b_pincount == 0);
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***/
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ASSERT(atomic_read(&bip->bli_refcount) == 0);
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ASSERT(!(bip->bli_item.li_flags & XFS_LI_IN_AIL));
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ASSERT(!(bip->bli_flags & XFS_BLI_INODE_ALLOC_BUF));
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xfs_buf_item_relse(bp);
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}
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bp->b_transp = NULL;
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xfs_buf_relse(bp);
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}
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/*
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* Mark the buffer as not needing to be unlocked when the buf item's
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* iop_unlock() routine is called. The buffer must already be locked
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* and associated with the given transaction.
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*/
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/* ARGSUSED */
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void
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xfs_trans_bhold(
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xfs_trans_t *tp,
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xfs_buf_t *bp)
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{
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struct xfs_buf_log_item *bip = bp->b_log_item;
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ASSERT(bp->b_transp == tp);
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ASSERT(bip != NULL);
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ASSERT(!(bip->bli_flags & XFS_BLI_STALE));
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ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL));
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ASSERT(atomic_read(&bip->bli_refcount) > 0);
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bip->bli_flags |= XFS_BLI_HOLD;
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trace_xfs_trans_bhold(bip);
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}
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/*
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* Cancel the previous buffer hold request made on this buffer
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* for this transaction.
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*/
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void
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xfs_trans_bhold_release(
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xfs_trans_t *tp,
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xfs_buf_t *bp)
|
|
{
|
|
struct xfs_buf_log_item *bip = bp->b_log_item;
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bip != NULL);
|
|
ASSERT(!(bip->bli_flags & XFS_BLI_STALE));
|
|
ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL));
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
ASSERT(bip->bli_flags & XFS_BLI_HOLD);
|
|
|
|
bip->bli_flags &= ~XFS_BLI_HOLD;
|
|
trace_xfs_trans_bhold_release(bip);
|
|
}
|
|
|
|
/*
|
|
* Mark a buffer dirty in the transaction.
|
|
*/
|
|
void
|
|
xfs_trans_dirty_buf(
|
|
struct xfs_trans *tp,
|
|
struct xfs_buf *bp)
|
|
{
|
|
struct xfs_buf_log_item *bip = bp->b_log_item;
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bip != NULL);
|
|
ASSERT(bp->b_iodone == NULL ||
|
|
bp->b_iodone == xfs_buf_iodone_callbacks);
|
|
|
|
/*
|
|
* Mark the buffer as needing to be written out eventually,
|
|
* and set its iodone function to remove the buffer's buf log
|
|
* item from the AIL and free it when the buffer is flushed
|
|
* to disk. See xfs_buf_attach_iodone() for more details
|
|
* on li_cb and xfs_buf_iodone_callbacks().
|
|
* If we end up aborting this transaction, we trap this buffer
|
|
* inside the b_bdstrat callback so that this won't get written to
|
|
* disk.
|
|
*/
|
|
bp->b_flags |= XBF_DONE;
|
|
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
bp->b_iodone = xfs_buf_iodone_callbacks;
|
|
bip->bli_item.li_cb = xfs_buf_iodone;
|
|
|
|
/*
|
|
* If we invalidated the buffer within this transaction, then
|
|
* cancel the invalidation now that we're dirtying the buffer
|
|
* again. There are no races with the code in xfs_buf_item_unpin(),
|
|
* because we have a reference to the buffer this entire time.
|
|
*/
|
|
if (bip->bli_flags & XFS_BLI_STALE) {
|
|
bip->bli_flags &= ~XFS_BLI_STALE;
|
|
ASSERT(bp->b_flags & XBF_STALE);
|
|
bp->b_flags &= ~XBF_STALE;
|
|
bip->__bli_format.blf_flags &= ~XFS_BLF_CANCEL;
|
|
}
|
|
bip->bli_flags |= XFS_BLI_DIRTY | XFS_BLI_LOGGED;
|
|
|
|
tp->t_flags |= XFS_TRANS_DIRTY;
|
|
bip->bli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
|
|
}
|
|
|
|
/*
|
|
* This is called to mark bytes first through last inclusive of the given
|
|
* buffer as needing to be logged when the transaction is committed.
|
|
* The buffer must already be associated with the given transaction.
|
|
*
|
|
* First and last are numbers relative to the beginning of this buffer,
|
|
* so the first byte in the buffer is numbered 0 regardless of the
|
|
* value of b_blkno.
|
|
*/
|
|
void
|
|
xfs_trans_log_buf(
|
|
struct xfs_trans *tp,
|
|
struct xfs_buf *bp,
|
|
uint first,
|
|
uint last)
|
|
{
|
|
struct xfs_buf_log_item *bip = bp->b_log_item;
|
|
|
|
ASSERT(first <= last && last < BBTOB(bp->b_length));
|
|
ASSERT(!(bip->bli_flags & XFS_BLI_ORDERED));
|
|
|
|
xfs_trans_dirty_buf(tp, bp);
|
|
|
|
trace_xfs_trans_log_buf(bip);
|
|
xfs_buf_item_log(bip, first, last);
|
|
}
|
|
|
|
|
|
/*
|
|
* Invalidate a buffer that is being used within a transaction.
|
|
*
|
|
* Typically this is because the blocks in the buffer are being freed, so we
|
|
* need to prevent it from being written out when we're done. Allowing it
|
|
* to be written again might overwrite data in the free blocks if they are
|
|
* reallocated to a file.
|
|
*
|
|
* We prevent the buffer from being written out by marking it stale. We can't
|
|
* get rid of the buf log item at this point because the buffer may still be
|
|
* pinned by another transaction. If that is the case, then we'll wait until
|
|
* the buffer is committed to disk for the last time (we can tell by the ref
|
|
* count) and free it in xfs_buf_item_unpin(). Until that happens we will
|
|
* keep the buffer locked so that the buffer and buf log item are not reused.
|
|
*
|
|
* We also set the XFS_BLF_CANCEL flag in the buf log format structure and log
|
|
* the buf item. This will be used at recovery time to determine that copies
|
|
* of the buffer in the log before this should not be replayed.
|
|
*
|
|
* We mark the item descriptor and the transaction dirty so that we'll hold
|
|
* the buffer until after the commit.
|
|
*
|
|
* Since we're invalidating the buffer, we also clear the state about which
|
|
* parts of the buffer have been logged. We also clear the flag indicating
|
|
* that this is an inode buffer since the data in the buffer will no longer
|
|
* be valid.
|
|
*
|
|
* We set the stale bit in the buffer as well since we're getting rid of it.
|
|
*/
|
|
void
|
|
xfs_trans_binval(
|
|
xfs_trans_t *tp,
|
|
xfs_buf_t *bp)
|
|
{
|
|
struct xfs_buf_log_item *bip = bp->b_log_item;
|
|
int i;
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bip != NULL);
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
|
|
trace_xfs_trans_binval(bip);
|
|
|
|
if (bip->bli_flags & XFS_BLI_STALE) {
|
|
/*
|
|
* If the buffer is already invalidated, then
|
|
* just return.
|
|
*/
|
|
ASSERT(bp->b_flags & XBF_STALE);
|
|
ASSERT(!(bip->bli_flags & (XFS_BLI_LOGGED | XFS_BLI_DIRTY)));
|
|
ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_INODE_BUF));
|
|
ASSERT(!(bip->__bli_format.blf_flags & XFS_BLFT_MASK));
|
|
ASSERT(bip->__bli_format.blf_flags & XFS_BLF_CANCEL);
|
|
ASSERT(bip->bli_item.li_desc->lid_flags & XFS_LID_DIRTY);
|
|
ASSERT(tp->t_flags & XFS_TRANS_DIRTY);
|
|
return;
|
|
}
|
|
|
|
xfs_buf_stale(bp);
|
|
|
|
bip->bli_flags |= XFS_BLI_STALE;
|
|
bip->bli_flags &= ~(XFS_BLI_INODE_BUF | XFS_BLI_LOGGED | XFS_BLI_DIRTY);
|
|
bip->__bli_format.blf_flags &= ~XFS_BLF_INODE_BUF;
|
|
bip->__bli_format.blf_flags |= XFS_BLF_CANCEL;
|
|
bip->__bli_format.blf_flags &= ~XFS_BLFT_MASK;
|
|
for (i = 0; i < bip->bli_format_count; i++) {
|
|
memset(bip->bli_formats[i].blf_data_map, 0,
|
|
(bip->bli_formats[i].blf_map_size * sizeof(uint)));
|
|
}
|
|
bip->bli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
|
|
tp->t_flags |= XFS_TRANS_DIRTY;
|
|
}
|
|
|
|
/*
|
|
* This call is used to indicate that the buffer contains on-disk inodes which
|
|
* must be handled specially during recovery. They require special handling
|
|
* because only the di_next_unlinked from the inodes in the buffer should be
|
|
* recovered. The rest of the data in the buffer is logged via the inodes
|
|
* themselves.
|
|
*
|
|
* All we do is set the XFS_BLI_INODE_BUF flag in the items flags so it can be
|
|
* transferred to the buffer's log format structure so that we'll know what to
|
|
* do at recovery time.
|
|
*/
|
|
void
|
|
xfs_trans_inode_buf(
|
|
xfs_trans_t *tp,
|
|
xfs_buf_t *bp)
|
|
{
|
|
struct xfs_buf_log_item *bip = bp->b_log_item;
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bip != NULL);
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
|
|
bip->bli_flags |= XFS_BLI_INODE_BUF;
|
|
xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DINO_BUF);
|
|
}
|
|
|
|
/*
|
|
* This call is used to indicate that the buffer is going to
|
|
* be staled and was an inode buffer. This means it gets
|
|
* special processing during unpin - where any inodes
|
|
* associated with the buffer should be removed from ail.
|
|
* There is also special processing during recovery,
|
|
* any replay of the inodes in the buffer needs to be
|
|
* prevented as the buffer may have been reused.
|
|
*/
|
|
void
|
|
xfs_trans_stale_inode_buf(
|
|
xfs_trans_t *tp,
|
|
xfs_buf_t *bp)
|
|
{
|
|
struct xfs_buf_log_item *bip = bp->b_log_item;
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bip != NULL);
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
|
|
bip->bli_flags |= XFS_BLI_STALE_INODE;
|
|
bip->bli_item.li_cb = xfs_buf_iodone;
|
|
xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DINO_BUF);
|
|
}
|
|
|
|
/*
|
|
* Mark the buffer as being one which contains newly allocated
|
|
* inodes. We need to make sure that even if this buffer is
|
|
* relogged as an 'inode buf' we still recover all of the inode
|
|
* images in the face of a crash. This works in coordination with
|
|
* xfs_buf_item_committed() to ensure that the buffer remains in the
|
|
* AIL at its original location even after it has been relogged.
|
|
*/
|
|
/* ARGSUSED */
|
|
void
|
|
xfs_trans_inode_alloc_buf(
|
|
xfs_trans_t *tp,
|
|
xfs_buf_t *bp)
|
|
{
|
|
struct xfs_buf_log_item *bip = bp->b_log_item;
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bip != NULL);
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
|
|
bip->bli_flags |= XFS_BLI_INODE_ALLOC_BUF;
|
|
xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DINO_BUF);
|
|
}
|
|
|
|
/*
|
|
* Mark the buffer as ordered for this transaction. This means that the contents
|
|
* of the buffer are not recorded in the transaction but it is tracked in the
|
|
* AIL as though it was. This allows us to record logical changes in
|
|
* transactions rather than the physical changes we make to the buffer without
|
|
* changing writeback ordering constraints of metadata buffers.
|
|
*/
|
|
bool
|
|
xfs_trans_ordered_buf(
|
|
struct xfs_trans *tp,
|
|
struct xfs_buf *bp)
|
|
{
|
|
struct xfs_buf_log_item *bip = bp->b_log_item;
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bip != NULL);
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
|
|
if (xfs_buf_item_dirty_format(bip))
|
|
return false;
|
|
|
|
bip->bli_flags |= XFS_BLI_ORDERED;
|
|
trace_xfs_buf_item_ordered(bip);
|
|
|
|
/*
|
|
* We don't log a dirty range of an ordered buffer but it still needs
|
|
* to be marked dirty and that it has been logged.
|
|
*/
|
|
xfs_trans_dirty_buf(tp, bp);
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Set the type of the buffer for log recovery so that it can correctly identify
|
|
* and hence attach the correct buffer ops to the buffer after replay.
|
|
*/
|
|
void
|
|
xfs_trans_buf_set_type(
|
|
struct xfs_trans *tp,
|
|
struct xfs_buf *bp,
|
|
enum xfs_blft type)
|
|
{
|
|
struct xfs_buf_log_item *bip = bp->b_log_item;
|
|
|
|
if (!tp)
|
|
return;
|
|
|
|
ASSERT(bp->b_transp == tp);
|
|
ASSERT(bip != NULL);
|
|
ASSERT(atomic_read(&bip->bli_refcount) > 0);
|
|
|
|
xfs_blft_to_flags(&bip->__bli_format, type);
|
|
}
|
|
|
|
void
|
|
xfs_trans_buf_copy_type(
|
|
struct xfs_buf *dst_bp,
|
|
struct xfs_buf *src_bp)
|
|
{
|
|
struct xfs_buf_log_item *sbip = src_bp->b_log_item;
|
|
struct xfs_buf_log_item *dbip = dst_bp->b_log_item;
|
|
enum xfs_blft type;
|
|
|
|
type = xfs_blft_from_flags(&sbip->__bli_format);
|
|
xfs_blft_to_flags(&dbip->__bli_format, type);
|
|
}
|
|
|
|
/*
|
|
* Similar to xfs_trans_inode_buf(), this marks the buffer as a cluster of
|
|
* dquots. However, unlike in inode buffer recovery, dquot buffers get
|
|
* recovered in their entirety. (Hence, no XFS_BLI_DQUOT_ALLOC_BUF flag).
|
|
* The only thing that makes dquot buffers different from regular
|
|
* buffers is that we must not replay dquot bufs when recovering
|
|
* if a _corresponding_ quotaoff has happened. We also have to distinguish
|
|
* between usr dquot bufs and grp dquot bufs, because usr and grp quotas
|
|
* can be turned off independently.
|
|
*/
|
|
/* ARGSUSED */
|
|
void
|
|
xfs_trans_dquot_buf(
|
|
xfs_trans_t *tp,
|
|
xfs_buf_t *bp,
|
|
uint type)
|
|
{
|
|
struct xfs_buf_log_item *bip = bp->b_log_item;
|
|
|
|
ASSERT(type == XFS_BLF_UDQUOT_BUF ||
|
|
type == XFS_BLF_PDQUOT_BUF ||
|
|
type == XFS_BLF_GDQUOT_BUF);
|
|
|
|
bip->__bli_format.blf_flags |= type;
|
|
|
|
switch (type) {
|
|
case XFS_BLF_UDQUOT_BUF:
|
|
type = XFS_BLFT_UDQUOT_BUF;
|
|
break;
|
|
case XFS_BLF_PDQUOT_BUF:
|
|
type = XFS_BLFT_PDQUOT_BUF;
|
|
break;
|
|
case XFS_BLF_GDQUOT_BUF:
|
|
type = XFS_BLFT_GDQUOT_BUF;
|
|
break;
|
|
default:
|
|
type = XFS_BLFT_UNKNOWN_BUF;
|
|
break;
|
|
}
|
|
|
|
xfs_trans_buf_set_type(tp, bp, type);
|
|
}
|