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![Dave Chinner](/assets/img/avatar_default.png)
Prepare for kernel xfs_buf alignment by getting rid of the xfs_buf_t typedef from userspace. [darrick: This patch is a port of a userspace patch removing the xfs_buf_t typedef in preparation to make the userspace xfs_buf code behave more like its kernel counterpart.] Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
768 lines
20 KiB
C
768 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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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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#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_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_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 *lip;
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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(lip, &tp->t_items, li_trans) {
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blip = (struct xfs_buf_log_item *)lip;
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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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* Attach the item to the transaction so we can find it in
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* xfs_trans_get_buf() and friends.
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*/
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xfs_trans_add_item(tp, &bip->bli_item);
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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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int
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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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struct xfs_buf **bpp)
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{
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struct xfs_buf *bp;
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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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if (!tp)
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return xfs_buf_get_map(target, map, nmaps, flags, bpp);
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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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*bpp = bp;
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return 0;
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}
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error = xfs_buf_get_map(target, map, nmaps, flags, &bp);
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if (error)
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return error;
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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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*bpp = bp;
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return 0;
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}
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/*
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* Get and lock the superblock buffer for the given transaction.
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*/
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struct xfs_buf *
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xfs_trans_getsb(
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struct xfs_trans *tp)
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{
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struct xfs_buf *bp = tp->t_mountp->m_sb_bp;
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/*
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* Just increment the lock recursion count if the buffer is already
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* attached to this transaction.
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*/
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if (bp->b_transp == tp) {
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struct xfs_buf_log_item *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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} else {
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xfs_buf_lock(bp);
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xfs_buf_hold(bp);
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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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}
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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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/*
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* Check if the caller is trying to read a buffer that is
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* already attached to the transaction yet has no buffer ops
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* assigned. Ops are usually attached when the buffer is
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* attached to the transaction, or by the read caller if
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* special circumstances. That didn't happen, which is not
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* how this is supposed to go.
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*
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* If the buffer passes verification we'll let this go, but if
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* not we have to shut down. Let the transaction cleanup code
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* release this buffer when it kills the tranaction.
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*/
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ASSERT(bp->b_ops != NULL);
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error = xfs_buf_reverify(bp, ops);
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if (error) {
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xfs_buf_ioerror_alert(bp, __return_address);
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if (tp->t_flags & XFS_TRANS_DIRTY)
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xfs_force_shutdown(tp->t_mountp,
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SHUTDOWN_META_IO_ERROR);
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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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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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ASSERT(bp->b_ops != NULL || ops == NULL);
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*bpp = bp;
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return 0;
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}
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error = xfs_buf_read_map(target, map, nmaps, flags, &bp, ops,
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__return_address);
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switch (error) {
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case 0:
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break;
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default:
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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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/* fall through */
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case -ENOMEM:
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case -EAGAIN:
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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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ASSERT(bp->b_ops != NULL || ops == NULL);
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*bpp = bp;
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return 0;
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}
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/* Has this buffer been dirtied by anyone? */
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bool
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xfs_trans_buf_is_dirty(
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struct xfs_buf *bp)
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{
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struct xfs_buf_log_item *bip = bp->b_log_item;
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if (!bip)
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return false;
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ASSERT(bip->bli_item.li_type == XFS_LI_BUF);
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return test_bit(XFS_LI_DIRTY, &bip->bli_item.li_flags);
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}
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/*
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* Release a buffer previously joined to the transaction. If the buffer is
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* modified within this transaction, decrement the recursion count but do not
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* release the buffer even if the count goes to 0. If the buffer is not modified
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* within the transaction, decrement the recursion count and release the buffer
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* 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 already dirty before this
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* transaction began, then also free the buf_log_item associated with it.
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*
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* If the transaction pointer is NULL, this is a normal xfs_buf_relse() call.
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*/
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void
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xfs_trans_brelse(
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struct xfs_trans *tp,
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struct xfs_buf *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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if (!tp) {
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xfs_buf_relse(bp);
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return;
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}
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trace_xfs_trans_brelse(bip);
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ASSERT(bip->bli_item.li_type == XFS_LI_BUF);
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ASSERT(atomic_read(&bip->bli_refcount) > 0);
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/*
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* If the release is for a recursive lookup, then decrement the count
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* 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 invalidated or dirty in this transaction, we can't
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* release it until we commit.
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*/
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if (test_bit(XFS_LI_DIRTY, &bip->bli_item.li_flags))
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return;
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if (bip->bli_flags & XFS_BLI_STALE)
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return;
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/*
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* Unlink the log item from the transaction and clear the hold flag, if
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* set. We wouldn't want the next user of the buffer to get confused.
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*/
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ASSERT(!(bip->bli_flags & XFS_BLI_LOGGED));
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xfs_trans_del_item(&bip->bli_item);
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bip->bli_flags &= ~XFS_BLI_HOLD;
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/* drop the reference to the bli */
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xfs_buf_item_put(bip);
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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_committing() 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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struct xfs_buf *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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struct xfs_buf *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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ASSERT(bip->bli_flags & XFS_BLI_HOLD);
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bip->bli_flags &= ~XFS_BLI_HOLD;
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trace_xfs_trans_bhold_release(bip);
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}
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/*
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* Mark a buffer dirty in the transaction.
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*/
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void
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xfs_trans_dirty_buf(
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struct xfs_trans *tp,
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struct xfs_buf *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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/*
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* Mark the buffer as needing to be written out eventually,
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* and set its iodone function to remove the buffer's buf log
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* item from the AIL and free it when the buffer is flushed
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* to disk.
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*/
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bp->b_flags |= XBF_DONE;
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ASSERT(atomic_read(&bip->bli_refcount) > 0);
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/*
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* If we invalidated the buffer within this transaction, then
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* cancel the invalidation now that we're dirtying the buffer
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* again. There are no races with the code in xfs_buf_item_unpin(),
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* because we have a reference to the buffer this entire time.
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*/
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if (bip->bli_flags & XFS_BLI_STALE) {
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bip->bli_flags &= ~XFS_BLI_STALE;
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ASSERT(bp->b_flags & XBF_STALE);
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bp->b_flags &= ~XBF_STALE;
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bip->__bli_format.blf_flags &= ~XFS_BLF_CANCEL;
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}
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bip->bli_flags |= XFS_BLI_DIRTY | XFS_BLI_LOGGED;
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tp->t_flags |= XFS_TRANS_DIRTY;
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set_bit(XFS_LI_DIRTY, &bip->bli_item.li_flags);
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}
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/*
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* This is called to mark bytes first through last inclusive of the given
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* buffer as needing to be logged when the transaction is committed.
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* The buffer must already be associated with the given transaction.
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*
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* First and last are numbers relative to the beginning of this buffer,
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* so the first byte in the buffer is numbered 0 regardless of the
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* value of b_blkno.
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*/
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void
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xfs_trans_log_buf(
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struct xfs_trans *tp,
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struct xfs_buf *bp,
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uint first,
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uint last)
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{
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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,
|
|
struct xfs_buf *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(test_bit(XFS_LI_DIRTY, &bip->bli_item.li_flags));
|
|
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)));
|
|
}
|
|
set_bit(XFS_LI_DIRTY, &bip->bli_item.li_flags);
|
|
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,
|
|
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);
|
|
|
|
bip->bli_flags |= XFS_BLI_INODE_BUF;
|
|
bp->b_flags |= _XBF_INODES;
|
|
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,
|
|
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);
|
|
|
|
bip->bli_flags |= XFS_BLI_STALE_INODE;
|
|
bp->b_flags |= _XBF_INODES;
|
|
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,
|
|
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);
|
|
|
|
bip->bli_flags |= XFS_BLI_INODE_ALLOC_BUF;
|
|
bp->b_flags |= _XBF_INODES;
|
|
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,
|
|
struct xfs_buf *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;
|
|
}
|
|
|
|
bp->b_flags |= _XBF_DQUOTS;
|
|
xfs_trans_buf_set_type(tp, bp, type);
|
|
}
|