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xfs: merge iop_unpin_remove into iop_unpin 

The unpin_remove item operation instances always share most of the
implementation with the respective unpin implementation.  So instead
of keeping two different entry points add a remove flag to the unpin
operation and share the code more easily.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Christoph Hellwig 2010-06-23 18:11:15 +10:00 committed by Alex Elder
parent e98c414f9a
commit 9412e3181c
6 changed files with 47 additions and 136 deletions
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33
fs/xfs/quota/xfs_dquot_item.c
View File

@ -97,7 +97,8 @@ xfs_qm_dquot_logitem_pin(
/* ARGSUSED */
STATIC void
xfs_qm_dquot_logitem_unpin(
xfs_dq_logitem_t *logitem)
xfs_dq_logitem_t *logitem,
int remove)
{
xfs_dquot_t *dqp = logitem->qli_dquot;
@ -106,15 +107,6 @@ xfs_qm_dquot_logitem_unpin(
wake_up(&dqp->q_pinwait);
}
/* ARGSUSED */
STATIC void
xfs_qm_dquot_logitem_unpin_remove(
xfs_dq_logitem_t *logitem,
xfs_trans_t *tp)
{
xfs_qm_dquot_logitem_unpin(logitem);
}
/*
* Given the logitem, this writes the corresponding dquot entry to disk
* asynchronously. This is called with the dquot entry securely locked;
@ -318,9 +310,7 @@ static struct xfs_item_ops xfs_dquot_item_ops = {
.iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
xfs_qm_dquot_logitem_format,
.iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_pin,
.iop_unpin = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_unpin,
.iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*))
xfs_qm_dquot_logitem_unpin_remove,
.iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_qm_dquot_logitem_unpin,
.iop_trylock = (uint(*)(xfs_log_item_t*))
xfs_qm_dquot_logitem_trylock,
.iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_unlock,
@ -413,14 +403,7 @@ xfs_qm_qoff_logitem_pin(xfs_qoff_logitem_t *qf)
*/
/*ARGSUSED*/
STATIC void
xfs_qm_qoff_logitem_unpin(xfs_qoff_logitem_t *qf)
{
return;
}
/*ARGSUSED*/
STATIC void
xfs_qm_qoff_logitem_unpin_remove(xfs_qoff_logitem_t *qf, xfs_trans_t *tp)
xfs_qm_qoff_logitem_unpin(xfs_qoff_logitem_t *qf, int remove)
{
return;
}
@ -524,9 +507,7 @@ static struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
.iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
xfs_qm_qoff_logitem_format,
.iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin,
.iop_unpin = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unpin,
.iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*))
xfs_qm_qoff_logitem_unpin_remove,
.iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_qm_qoff_logitem_unpin,
.iop_trylock = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock,
.iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock,
.iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
@ -545,9 +526,7 @@ static struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
.iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
xfs_qm_qoff_logitem_format,
.iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin,
.iop_unpin = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unpin,
.iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*))
xfs_qm_qoff_logitem_unpin_remove,
.iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_qm_qoff_logitem_unpin,
.iop_trylock = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock,
.iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock,
.iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))

74
fs/xfs/xfs_buf_item.c
View File

@ -388,20 +388,25 @@ xfs_buf_item_pin(
* Also drop the reference to the buf item for the current transaction.
* If the XFS_BLI_STALE flag is set and we are the last reference,
* then free up the buf log item and unlock the buffer.
*
* If the remove flag is set we are called from uncommit in the
* forced-shutdown path. If that is true and the reference count on
* the log item is going to drop to zero we need to free the item's
* descriptor in the transaction.
*/
STATIC void
xfs_buf_item_unpin(
xfs_buf_log_item_t *bip)
xfs_buf_log_item_t *bip,
int remove)
{
struct xfs_ail *ailp;
xfs_buf_t *bp;
xfs_buf_t *bp = bip->bli_buf;
int freed;
int stale = bip->bli_flags & XFS_BLI_STALE;
bp = bip->bli_buf;
ASSERT(bp != NULL);
ASSERT(XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *) == bip);
ASSERT(atomic_read(&bip->bli_refcount) > 0);
trace_xfs_buf_item_unpin(bip);
freed = atomic_dec_and_test(&bip->bli_refcount);
@ -413,8 +418,26 @@ xfs_buf_item_unpin(
ASSERT(!(XFS_BUF_ISDELAYWRITE(bp)));
ASSERT(XFS_BUF_ISSTALE(bp));
ASSERT(bip->bli_format.blf_flags & XFS_BLF_CANCEL);
trace_xfs_buf_item_unpin_stale(bip);
if (remove) {
/*
* We have to remove the log item from the transaction
* as we are about to release our reference to the
* buffer. If we don't, the unlock that occurs later
* in xfs_trans_uncommit() will ry to reference the
* buffer which we no longer have a hold on.
*/
xfs_trans_del_item(&bip->bli_item);
/*
* Since the transaction no longer refers to the buffer,
* the buffer should no longer refer to the transaction.
*/
XFS_BUF_SET_FSPRIVATE2(bp, NULL);
}
/*
* If we get called here because of an IO error, we may
* or may not have the item on the AIL. xfs_trans_ail_delete()
@ -435,45 +458,6 @@ xfs_buf_item_unpin(
}
}
/*
* this is called from uncommit in the forced-shutdown path.
* we need to check to see if the reference count on the log item
* is going to drop to zero. If so, unpin will free the log item
* so we need to free the item's descriptor (that points to the item)
* in the transaction.
*/
STATIC void
xfs_buf_item_unpin_remove(
xfs_buf_log_item_t *bip,
xfs_trans_t *tp)
{
/* will xfs_buf_item_unpin() call xfs_buf_item_relse()? */
if ((atomic_read(&bip->bli_refcount) == 1) &&
(bip->bli_flags & XFS_BLI_STALE)) {
/*
* yes -- We can safely do some work here and then call
* buf_item_unpin to do the rest because we are
* are holding the buffer locked so no one else will be
* able to bump up the refcount. We have to remove the
* log item from the transaction as we are about to release
* our reference to the buffer. If we don't, the unlock that
* occurs later in the xfs_trans_uncommit() will try to
* reference the buffer which we no longer have a hold on.
*/
ASSERT(XFS_BUF_VALUSEMA(bip->bli_buf) <= 0);
trace_xfs_buf_item_unpin_stale(bip);
xfs_trans_del_item(&bip->bli_item);
/*
* Since the transaction no longer refers to the buffer, the
* buffer should no longer refer to the transaction.
*/
XFS_BUF_SET_FSPRIVATE2(bip->bli_buf, NULL);
}
xfs_buf_item_unpin(bip);
}
/*
* This is called to attempt to lock the buffer associated with this
* buf log item. Don't sleep on the buffer lock. If we can't get
@ -669,9 +653,7 @@ static struct xfs_item_ops xfs_buf_item_ops = {
.iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
xfs_buf_item_format,
.iop_pin = (void(*)(xfs_log_item_t*))xfs_buf_item_pin,
.iop_unpin = (void(*)(xfs_log_item_t*))xfs_buf_item_unpin,
.iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t *))
xfs_buf_item_unpin_remove,
.iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_buf_item_unpin,
.iop_trylock = (uint(*)(xfs_log_item_t*))xfs_buf_item_trylock,
.iop_unlock = (void(*)(xfs_log_item_t*))xfs_buf_item_unlock,
.iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))

49
fs/xfs/xfs_extfree_item.c
View File

@ -103,32 +103,8 @@ xfs_efi_item_pin(xfs_efi_log_item_t *efip)
* Here we coordinate with xfs_efi_cancel() to determine who gets to
* free the EFI.
*/
/*ARGSUSED*/
STATIC void
xfs_efi_item_unpin(xfs_efi_log_item_t *efip)
{
struct xfs_ail *ailp = efip->efi_item.li_ailp;
spin_lock(&ailp->xa_lock);
if (efip->efi_flags & XFS_EFI_CANCELED) {
/* xfs_trans_ail_delete() drops the AIL lock. */
xfs_trans_ail_delete(ailp, (xfs_log_item_t *)efip);
xfs_efi_item_free(efip);
} else {
efip->efi_flags |= XFS_EFI_COMMITTED;
spin_unlock(&ailp->xa_lock);
}
}
/*
* like unpin only we have to also clear the xaction descriptor
* pointing the log item if we free the item. This routine duplicates
* unpin because efi_flags is protected by the AIL lock. Freeing
* the descriptor and then calling unpin would force us to drop the AIL
* lock which would open up a race condition.
*/
STATIC void
xfs_efi_item_unpin_remove(xfs_efi_log_item_t *efip, xfs_trans_t *tp)
xfs_efi_item_unpin(xfs_efi_log_item_t *efip, int remove)
{
struct xfs_ail *ailp = efip->efi_item.li_ailp;
@ -136,10 +112,8 @@ xfs_efi_item_unpin_remove(xfs_efi_log_item_t *efip, xfs_trans_t *tp)
if (efip->efi_flags & XFS_EFI_CANCELED) {
struct xfs_log_item *lip = &efip->efi_item;
/*
* free the xaction descriptor pointing to this item
*/
xfs_trans_del_item(lip);
if (remove)
xfs_trans_del_item(lip);
/* xfs_trans_ail_delete() drops the AIL lock. */
xfs_trans_ail_delete(ailp, lip);
@ -223,9 +197,7 @@ static struct xfs_item_ops xfs_efi_item_ops = {
.iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
xfs_efi_item_format,
.iop_pin = (void(*)(xfs_log_item_t*))xfs_efi_item_pin,
.iop_unpin = (void(*)(xfs_log_item_t*))xfs_efi_item_unpin,
.iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t *))
xfs_efi_item_unpin_remove,
.iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_efi_item_unpin,
.iop_trylock = (uint(*)(xfs_log_item_t*))xfs_efi_item_trylock,
.iop_unlock = (void(*)(xfs_log_item_t*))xfs_efi_item_unlock,
.iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
@ -424,14 +396,7 @@ xfs_efd_item_pin(xfs_efd_log_item_t *efdp)
*/
/*ARGSUSED*/
STATIC void
xfs_efd_item_unpin(xfs_efd_log_item_t *efdp)
{
return;
}
/*ARGSUSED*/
STATIC void
xfs_efd_item_unpin_remove(xfs_efd_log_item_t *efdp, xfs_trans_t *tp)
xfs_efd_item_unpin(xfs_efd_log_item_t *efdp, int remove)
{
return;
}
@ -514,9 +479,7 @@ static struct xfs_item_ops xfs_efd_item_ops = {
.iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
xfs_efd_item_format,
.iop_pin = (void(*)(xfs_log_item_t*))xfs_efd_item_pin,
.iop_unpin = (void(*)(xfs_log_item_t*))xfs_efd_item_unpin,
.iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*))
xfs_efd_item_unpin_remove,
.iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_efd_item_unpin,
.iop_trylock = (uint(*)(xfs_log_item_t*))xfs_efd_item_trylock,
.iop_unlock = (void(*)(xfs_log_item_t*))xfs_efd_item_unlock,
.iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))

17
fs/xfs/xfs_inode_item.c
View File

@ -544,10 +544,10 @@ xfs_inode_item_pin(
*
* Also wake up anyone in xfs_iunpin_wait() if the count goes to 0.
*/
/* ARGSUSED */
STATIC void
xfs_inode_item_unpin(
xfs_inode_log_item_t *iip)
xfs_inode_log_item_t *iip,
int remove)
{
struct xfs_inode *ip = iip->ili_inode;
@ -557,15 +557,6 @@ xfs_inode_item_unpin(
wake_up(&ip->i_ipin_wait);
}
/* ARGSUSED */
STATIC void
xfs_inode_item_unpin_remove(
xfs_inode_log_item_t *iip,
xfs_trans_t *tp)
{
xfs_inode_item_unpin(iip);
}
/*
* This is called to attempt to lock the inode associated with this
* inode log item, in preparation for the push routine which does the actual
@ -829,9 +820,7 @@ static struct xfs_item_ops xfs_inode_item_ops = {
.iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
xfs_inode_item_format,
.iop_pin = (void(*)(xfs_log_item_t*))xfs_inode_item_pin,
.iop_unpin = (void(*)(xfs_log_item_t*))xfs_inode_item_unpin,
.iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*))
xfs_inode_item_unpin_remove,
.iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_inode_item_unpin,
.iop_trylock = (uint(*)(xfs_log_item_t*))xfs_inode_item_trylock,
.iop_unlock = (void(*)(xfs_log_item_t*))xfs_inode_item_unlock,
.iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))

4
fs/xfs/xfs_trans.c
View File

@ -1375,7 +1375,7 @@ xfs_trans_item_committed(
* log item flags, if anyone else stales the buffer we do not want to
* pay any attention to it.
*/
IOP_UNPIN(lip);
IOP_UNPIN(lip, 0);
}
/*
@ -1422,7 +1422,7 @@ xfs_trans_uncommit(
* Unpin all but those that aren't dirty.
*/
if (lidp->lid_flags & XFS_LID_DIRTY)
IOP_UNPIN_REMOVE(lidp->lid_item, tp);
IOP_UNPIN(lidp->lid_item, 1);
}
xfs_trans_unreserve_and_mod_sb(tp);

6
fs/xfs/xfs_trans.h
View File

@ -347,8 +347,7 @@ typedef struct xfs_item_ops {
uint (*iop_size)(xfs_log_item_t *);
void (*iop_format)(xfs_log_item_t *, struct xfs_log_iovec *);
void (*iop_pin)(xfs_log_item_t *);
void (*iop_unpin)(xfs_log_item_t *);
void (*iop_unpin_remove)(xfs_log_item_t *, struct xfs_trans *);
void (*iop_unpin)(xfs_log_item_t *, int remove);
uint (*iop_trylock)(xfs_log_item_t *);
void (*iop_unlock)(xfs_log_item_t *);
xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
@ -360,8 +359,7 @@ typedef struct xfs_item_ops {
#define IOP_SIZE(ip) (*(ip)->li_ops->iop_size)(ip)
#define IOP_FORMAT(ip,vp) (*(ip)->li_ops->iop_format)(ip, vp)
#define IOP_PIN(ip) (*(ip)->li_ops->iop_pin)(ip)
#define IOP_UNPIN(ip) (*(ip)->li_ops->iop_unpin)(ip)
#define IOP_UNPIN_REMOVE(ip,tp) (*(ip)->li_ops->iop_unpin_remove)(ip, tp)
#define IOP_UNPIN(ip, remove) (*(ip)->li_ops->iop_unpin)(ip, remove)
#define IOP_TRYLOCK(ip) (*(ip)->li_ops->iop_trylock)(ip)
#define IOP_UNLOCK(ip) (*(ip)->li_ops->iop_unlock)(ip)
#define IOP_COMMITTED(ip, lsn) (*(ip)->li_ops->iop_committed)(ip, lsn)