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[XFS] Move the AIL lock into the struct xfs_ail

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Bring the ail lock inside the struct xfs_ail. This means the AIL can be
entirely manipulated via the struct xfs_ail rather than needing both the
struct xfs_mount and the struct xfs_ail.

SGI-PV: 988143

SGI-Modid: xfs-linux-melb:xfs-kern:32350a

Signed-off-by: David Chinner <david@fromorbit.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
This commit is contained in:
David Chinner
2008-10-30 17:39:23 +11:00
committed by Lachlan McIlroy
parent 7b2e2a31f5
commit c7e8f26827
12 changed files with 59 additions and 58 deletions
Download Patch File Download Diff File Expand all files Collapse all files

56
fs/xfs/xfs_trans_ail.c
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
* Copyright (c) 2008 Dave Chinner
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
@ -56,14 +57,14 @@ xfs_trans_ail_tail(
xfs_lsn_t lsn;
xfs_log_item_t *lip;
spin_lock(&ailp->xa_mount->m_ail_lock);
spin_lock(&ailp->xa_lock);
lip = xfs_ail_min(ailp);
if (lip == NULL) {
lsn = (xfs_lsn_t)0;
} else {
lsn = lip->li_lsn;
}
spin_unlock(&ailp->xa_mount->m_ail_lock);
spin_unlock(&ailp->xa_lock);
return lsn;
}
@ -252,7 +253,7 @@ xfsaild_push(
xfs_mount_t *mp = ailp->xa_mount;
struct xfs_ail_cursor *cur = &ailp->xa_cursors;
spin_lock(&mp->m_ail_lock);
spin_lock(&ailp->xa_lock);
xfs_trans_ail_cursor_init(ailp, cur);
lip = xfs_trans_ail_cursor_first(ailp, cur, *last_lsn);
if (!lip || XFS_FORCED_SHUTDOWN(mp)) {
@ -260,7 +261,7 @@ xfsaild_push(
* AIL is empty or our push has reached the end.
*/
xfs_trans_ail_cursor_done(ailp, cur);
spin_unlock(&mp->m_ail_lock);
spin_unlock(&ailp->xa_lock);
last_pushed_lsn = 0;
return tout;
}
@ -295,7 +296,7 @@ xfsaild_push(
* skip to the next item in the list.
*/
lock_result = IOP_TRYLOCK(lip);
spin_unlock(&mp->m_ail_lock);
spin_unlock(&ailp->xa_lock);
switch (lock_result) {
case XFS_ITEM_SUCCESS:
XFS_STATS_INC(xs_push_ail_success);
@ -332,7 +333,7 @@ xfsaild_push(
break;
}
spin_lock(&mp->m_ail_lock);
spin_lock(&ailp->xa_lock);
/* should we bother continuing? */
if (XFS_FORCED_SHUTDOWN(mp))
break;
@ -361,7 +362,7 @@ xfsaild_push(
lsn = lip->li_lsn;
}
xfs_trans_ail_cursor_done(ailp, cur);
spin_unlock(&mp->m_ail_lock);
spin_unlock(&ailp->xa_lock);
if (flush_log) {
/*
@ -462,30 +463,31 @@ void
xfs_trans_update_ail(
xfs_mount_t *mp,
xfs_log_item_t *lip,
xfs_lsn_t lsn) __releases(mp->m_ail_lock)
xfs_lsn_t lsn) __releases(ailp->xa_lock)
{
xfs_log_item_t *dlip=NULL;
struct xfs_ail *ailp = mp->m_ail;
xfs_log_item_t *dlip = NULL;
xfs_log_item_t *mlip; /* ptr to minimum lip */
mlip = xfs_ail_min(mp->m_ail);
mlip = xfs_ail_min(ailp);
if (lip->li_flags & XFS_LI_IN_AIL) {
dlip = xfs_ail_delete(mp->m_ail, lip);
dlip = xfs_ail_delete(ailp, lip);
ASSERT(dlip == lip);
xfs_trans_ail_cursor_clear(mp->m_ail, dlip);
xfs_trans_ail_cursor_clear(ailp, dlip);
} else {
lip->li_flags |= XFS_LI_IN_AIL;
}
lip->li_lsn = lsn;
xfs_ail_insert(mp->m_ail, lip);
xfs_ail_insert(ailp, lip);
if (mlip == dlip) {
mlip = xfs_ail_min(mp->m_ail);
spin_unlock(&mp->m_ail_lock);
mlip = xfs_ail_min(ailp);
spin_unlock(&ailp->xa_lock);
xfs_log_move_tail(mp, mlip->li_lsn);
} else {
spin_unlock(&mp->m_ail_lock);
spin_unlock(&ailp->xa_lock);
}
@ -509,27 +511,28 @@ xfs_trans_update_ail(
void
xfs_trans_delete_ail(
xfs_mount_t *mp,
xfs_log_item_t *lip) __releases(mp->m_ail_lock)
xfs_log_item_t *lip) __releases(ailp->xa_lock)
{
struct xfs_ail *ailp = mp->m_ail;
xfs_log_item_t *dlip;
xfs_log_item_t *mlip;
if (lip->li_flags & XFS_LI_IN_AIL) {
mlip = xfs_ail_min(mp->m_ail);
dlip = xfs_ail_delete(mp->m_ail, lip);
mlip = xfs_ail_min(ailp);
dlip = xfs_ail_delete(ailp, lip);
ASSERT(dlip == lip);
xfs_trans_ail_cursor_clear(mp->m_ail, dlip);
xfs_trans_ail_cursor_clear(ailp, dlip);
lip->li_flags &= ~XFS_LI_IN_AIL;
lip->li_lsn = 0;
if (mlip == dlip) {
mlip = xfs_ail_min(mp->m_ail);
spin_unlock(&mp->m_ail_lock);
mlip = xfs_ail_min(ailp);
spin_unlock(&ailp->xa_lock);
xfs_log_move_tail(mp, (mlip ? mlip->li_lsn : 0));
} else {
spin_unlock(&mp->m_ail_lock);
spin_unlock(&ailp->xa_lock);
}
}
else {
@ -537,13 +540,11 @@ xfs_trans_delete_ail(
* If the file system is not being shutdown, we are in
* serious trouble if we get to this stage.
*/
if (XFS_FORCED_SHUTDOWN(mp))
spin_unlock(&mp->m_ail_lock);
else {
spin_unlock(&ailp->xa_lock);
if (!XFS_FORCED_SHUTDOWN(mp)) {
xfs_cmn_err(XFS_PTAG_AILDELETE, CE_ALERT, mp,
"%s: attempting to delete a log item that is not in the AIL",
__func__);
spin_unlock(&mp->m_ail_lock);
xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
}
}
@ -578,6 +579,7 @@ xfs_trans_ail_init(
ailp->xa_mount = mp;
INIT_LIST_HEAD(&ailp->xa_ail);
spin_lock_init(&ailp->xa_lock);
error = xfsaild_start(ailp);
if (error)
goto out_free_ailp;