494 lines
13 KiB
C
494 lines
13 KiB
C
/*
|
|
* Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
|
|
* All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it would be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#include "xfs.h"
|
|
#include "xfs_fs.h"
|
|
#include "xfs_types.h"
|
|
#include "xfs_log.h"
|
|
#include "xfs_trans.h"
|
|
#include "xfs_buf_item.h"
|
|
#include "xfs_sb.h"
|
|
#include "xfs_ag.h"
|
|
#include "xfs_mount.h"
|
|
#include "xfs_trans_priv.h"
|
|
#include "xfs_extfree_item.h"
|
|
|
|
|
|
kmem_zone_t *xfs_efi_zone;
|
|
kmem_zone_t *xfs_efd_zone;
|
|
|
|
static inline struct xfs_efi_log_item *EFI_ITEM(struct xfs_log_item *lip)
|
|
{
|
|
return container_of(lip, struct xfs_efi_log_item, efi_item);
|
|
}
|
|
|
|
void
|
|
xfs_efi_item_free(
|
|
struct xfs_efi_log_item *efip)
|
|
{
|
|
if (efip->efi_format.efi_nextents > XFS_EFI_MAX_FAST_EXTENTS)
|
|
kmem_free(efip);
|
|
else
|
|
kmem_zone_free(xfs_efi_zone, efip);
|
|
}
|
|
|
|
/*
|
|
* Freeing the efi requires that we remove it from the AIL if it has already
|
|
* been placed there. However, the EFI may not yet have been placed in the AIL
|
|
* when called by xfs_efi_release() from EFD processing due to the ordering of
|
|
* committed vs unpin operations in bulk insert operations. Hence the reference
|
|
* count to ensure only the last caller frees the EFI.
|
|
*/
|
|
STATIC void
|
|
__xfs_efi_release(
|
|
struct xfs_efi_log_item *efip)
|
|
{
|
|
struct xfs_ail *ailp = efip->efi_item.li_ailp;
|
|
|
|
if (atomic_dec_and_test(&efip->efi_refcount)) {
|
|
spin_lock(&ailp->xa_lock);
|
|
/* xfs_trans_ail_delete() drops the AIL lock. */
|
|
xfs_trans_ail_delete(ailp, &efip->efi_item,
|
|
SHUTDOWN_LOG_IO_ERROR);
|
|
xfs_efi_item_free(efip);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This returns the number of iovecs needed to log the given efi item.
|
|
* We only need 1 iovec for an efi item. It just logs the efi_log_format
|
|
* structure.
|
|
*/
|
|
STATIC uint
|
|
xfs_efi_item_size(
|
|
struct xfs_log_item *lip)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* This is called to fill in the vector of log iovecs for the
|
|
* given efi log item. We use only 1 iovec, and we point that
|
|
* at the efi_log_format structure embedded in the efi item.
|
|
* It is at this point that we assert that all of the extent
|
|
* slots in the efi item have been filled.
|
|
*/
|
|
STATIC void
|
|
xfs_efi_item_format(
|
|
struct xfs_log_item *lip,
|
|
struct xfs_log_iovec *log_vector)
|
|
{
|
|
struct xfs_efi_log_item *efip = EFI_ITEM(lip);
|
|
uint size;
|
|
|
|
ASSERT(atomic_read(&efip->efi_next_extent) ==
|
|
efip->efi_format.efi_nextents);
|
|
|
|
efip->efi_format.efi_type = XFS_LI_EFI;
|
|
|
|
size = sizeof(xfs_efi_log_format_t);
|
|
size += (efip->efi_format.efi_nextents - 1) * sizeof(xfs_extent_t);
|
|
efip->efi_format.efi_size = 1;
|
|
|
|
log_vector->i_addr = &efip->efi_format;
|
|
log_vector->i_len = size;
|
|
log_vector->i_type = XLOG_REG_TYPE_EFI_FORMAT;
|
|
ASSERT(size >= sizeof(xfs_efi_log_format_t));
|
|
}
|
|
|
|
|
|
/*
|
|
* Pinning has no meaning for an efi item, so just return.
|
|
*/
|
|
STATIC void
|
|
xfs_efi_item_pin(
|
|
struct xfs_log_item *lip)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* While EFIs cannot really be pinned, the unpin operation is the last place at
|
|
* which the EFI is manipulated during a transaction. If we are being asked to
|
|
* remove the EFI it's because the transaction has been cancelled and by
|
|
* definition that means the EFI cannot be in the AIL so remove it from the
|
|
* transaction and free it. Otherwise coordinate with xfs_efi_release()
|
|
* to determine who gets to free the EFI.
|
|
*/
|
|
STATIC void
|
|
xfs_efi_item_unpin(
|
|
struct xfs_log_item *lip,
|
|
int remove)
|
|
{
|
|
struct xfs_efi_log_item *efip = EFI_ITEM(lip);
|
|
|
|
if (remove) {
|
|
ASSERT(!(lip->li_flags & XFS_LI_IN_AIL));
|
|
if (lip->li_desc)
|
|
xfs_trans_del_item(lip);
|
|
xfs_efi_item_free(efip);
|
|
return;
|
|
}
|
|
__xfs_efi_release(efip);
|
|
}
|
|
|
|
/*
|
|
* Efi items have no locking or pushing. However, since EFIs are pulled from
|
|
* the AIL when their corresponding EFDs are committed to disk, their situation
|
|
* is very similar to being pinned. Return XFS_ITEM_PINNED so that the caller
|
|
* will eventually flush the log. This should help in getting the EFI out of
|
|
* the AIL.
|
|
*/
|
|
STATIC uint
|
|
xfs_efi_item_push(
|
|
struct xfs_log_item *lip,
|
|
struct list_head *buffer_list)
|
|
{
|
|
return XFS_ITEM_PINNED;
|
|
}
|
|
|
|
STATIC void
|
|
xfs_efi_item_unlock(
|
|
struct xfs_log_item *lip)
|
|
{
|
|
if (lip->li_flags & XFS_LI_ABORTED)
|
|
xfs_efi_item_free(EFI_ITEM(lip));
|
|
}
|
|
|
|
/*
|
|
* The EFI is logged only once and cannot be moved in the log, so simply return
|
|
* the lsn at which it's been logged.
|
|
*/
|
|
STATIC xfs_lsn_t
|
|
xfs_efi_item_committed(
|
|
struct xfs_log_item *lip,
|
|
xfs_lsn_t lsn)
|
|
{
|
|
return lsn;
|
|
}
|
|
|
|
/*
|
|
* The EFI dependency tracking op doesn't do squat. It can't because
|
|
* it doesn't know where the free extent is coming from. The dependency
|
|
* tracking has to be handled by the "enclosing" metadata object. For
|
|
* example, for inodes, the inode is locked throughout the extent freeing
|
|
* so the dependency should be recorded there.
|
|
*/
|
|
STATIC void
|
|
xfs_efi_item_committing(
|
|
struct xfs_log_item *lip,
|
|
xfs_lsn_t lsn)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* This is the ops vector shared by all efi log items.
|
|
*/
|
|
static const struct xfs_item_ops xfs_efi_item_ops = {
|
|
.iop_size = xfs_efi_item_size,
|
|
.iop_format = xfs_efi_item_format,
|
|
.iop_pin = xfs_efi_item_pin,
|
|
.iop_unpin = xfs_efi_item_unpin,
|
|
.iop_unlock = xfs_efi_item_unlock,
|
|
.iop_committed = xfs_efi_item_committed,
|
|
.iop_push = xfs_efi_item_push,
|
|
.iop_committing = xfs_efi_item_committing
|
|
};
|
|
|
|
|
|
/*
|
|
* Allocate and initialize an efi item with the given number of extents.
|
|
*/
|
|
struct xfs_efi_log_item *
|
|
xfs_efi_init(
|
|
struct xfs_mount *mp,
|
|
uint nextents)
|
|
|
|
{
|
|
struct xfs_efi_log_item *efip;
|
|
uint size;
|
|
|
|
ASSERT(nextents > 0);
|
|
if (nextents > XFS_EFI_MAX_FAST_EXTENTS) {
|
|
size = (uint)(sizeof(xfs_efi_log_item_t) +
|
|
((nextents - 1) * sizeof(xfs_extent_t)));
|
|
efip = kmem_zalloc(size, KM_SLEEP);
|
|
} else {
|
|
efip = kmem_zone_zalloc(xfs_efi_zone, KM_SLEEP);
|
|
}
|
|
|
|
xfs_log_item_init(mp, &efip->efi_item, XFS_LI_EFI, &xfs_efi_item_ops);
|
|
efip->efi_format.efi_nextents = nextents;
|
|
efip->efi_format.efi_id = (__psint_t)(void*)efip;
|
|
atomic_set(&efip->efi_next_extent, 0);
|
|
atomic_set(&efip->efi_refcount, 2);
|
|
|
|
return efip;
|
|
}
|
|
|
|
/*
|
|
* Copy an EFI format buffer from the given buf, and into the destination
|
|
* EFI format structure.
|
|
* The given buffer can be in 32 bit or 64 bit form (which has different padding),
|
|
* one of which will be the native format for this kernel.
|
|
* It will handle the conversion of formats if necessary.
|
|
*/
|
|
int
|
|
xfs_efi_copy_format(xfs_log_iovec_t *buf, xfs_efi_log_format_t *dst_efi_fmt)
|
|
{
|
|
xfs_efi_log_format_t *src_efi_fmt = buf->i_addr;
|
|
uint i;
|
|
uint len = sizeof(xfs_efi_log_format_t) +
|
|
(src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_t);
|
|
uint len32 = sizeof(xfs_efi_log_format_32_t) +
|
|
(src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_32_t);
|
|
uint len64 = sizeof(xfs_efi_log_format_64_t) +
|
|
(src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_64_t);
|
|
|
|
if (buf->i_len == len) {
|
|
memcpy((char *)dst_efi_fmt, (char*)src_efi_fmt, len);
|
|
return 0;
|
|
} else if (buf->i_len == len32) {
|
|
xfs_efi_log_format_32_t *src_efi_fmt_32 = buf->i_addr;
|
|
|
|
dst_efi_fmt->efi_type = src_efi_fmt_32->efi_type;
|
|
dst_efi_fmt->efi_size = src_efi_fmt_32->efi_size;
|
|
dst_efi_fmt->efi_nextents = src_efi_fmt_32->efi_nextents;
|
|
dst_efi_fmt->efi_id = src_efi_fmt_32->efi_id;
|
|
for (i = 0; i < dst_efi_fmt->efi_nextents; i++) {
|
|
dst_efi_fmt->efi_extents[i].ext_start =
|
|
src_efi_fmt_32->efi_extents[i].ext_start;
|
|
dst_efi_fmt->efi_extents[i].ext_len =
|
|
src_efi_fmt_32->efi_extents[i].ext_len;
|
|
}
|
|
return 0;
|
|
} else if (buf->i_len == len64) {
|
|
xfs_efi_log_format_64_t *src_efi_fmt_64 = buf->i_addr;
|
|
|
|
dst_efi_fmt->efi_type = src_efi_fmt_64->efi_type;
|
|
dst_efi_fmt->efi_size = src_efi_fmt_64->efi_size;
|
|
dst_efi_fmt->efi_nextents = src_efi_fmt_64->efi_nextents;
|
|
dst_efi_fmt->efi_id = src_efi_fmt_64->efi_id;
|
|
for (i = 0; i < dst_efi_fmt->efi_nextents; i++) {
|
|
dst_efi_fmt->efi_extents[i].ext_start =
|
|
src_efi_fmt_64->efi_extents[i].ext_start;
|
|
dst_efi_fmt->efi_extents[i].ext_len =
|
|
src_efi_fmt_64->efi_extents[i].ext_len;
|
|
}
|
|
return 0;
|
|
}
|
|
return EFSCORRUPTED;
|
|
}
|
|
|
|
/*
|
|
* This is called by the efd item code below to release references to the given
|
|
* efi item. Each efd calls this with the number of extents that it has
|
|
* logged, and when the sum of these reaches the total number of extents logged
|
|
* by this efi item we can free the efi item.
|
|
*/
|
|
void
|
|
xfs_efi_release(xfs_efi_log_item_t *efip,
|
|
uint nextents)
|
|
{
|
|
ASSERT(atomic_read(&efip->efi_next_extent) >= nextents);
|
|
if (atomic_sub_and_test(nextents, &efip->efi_next_extent)) {
|
|
/* recovery needs us to drop the EFI reference, too */
|
|
if (test_bit(XFS_EFI_RECOVERED, &efip->efi_flags))
|
|
__xfs_efi_release(efip);
|
|
|
|
__xfs_efi_release(efip);
|
|
/* efip may now have been freed, do not reference it again. */
|
|
}
|
|
}
|
|
|
|
static inline struct xfs_efd_log_item *EFD_ITEM(struct xfs_log_item *lip)
|
|
{
|
|
return container_of(lip, struct xfs_efd_log_item, efd_item);
|
|
}
|
|
|
|
STATIC void
|
|
xfs_efd_item_free(struct xfs_efd_log_item *efdp)
|
|
{
|
|
if (efdp->efd_format.efd_nextents > XFS_EFD_MAX_FAST_EXTENTS)
|
|
kmem_free(efdp);
|
|
else
|
|
kmem_zone_free(xfs_efd_zone, efdp);
|
|
}
|
|
|
|
/*
|
|
* This returns the number of iovecs needed to log the given efd item.
|
|
* We only need 1 iovec for an efd item. It just logs the efd_log_format
|
|
* structure.
|
|
*/
|
|
STATIC uint
|
|
xfs_efd_item_size(
|
|
struct xfs_log_item *lip)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* This is called to fill in the vector of log iovecs for the
|
|
* given efd log item. We use only 1 iovec, and we point that
|
|
* at the efd_log_format structure embedded in the efd item.
|
|
* It is at this point that we assert that all of the extent
|
|
* slots in the efd item have been filled.
|
|
*/
|
|
STATIC void
|
|
xfs_efd_item_format(
|
|
struct xfs_log_item *lip,
|
|
struct xfs_log_iovec *log_vector)
|
|
{
|
|
struct xfs_efd_log_item *efdp = EFD_ITEM(lip);
|
|
uint size;
|
|
|
|
ASSERT(efdp->efd_next_extent == efdp->efd_format.efd_nextents);
|
|
|
|
efdp->efd_format.efd_type = XFS_LI_EFD;
|
|
|
|
size = sizeof(xfs_efd_log_format_t);
|
|
size += (efdp->efd_format.efd_nextents - 1) * sizeof(xfs_extent_t);
|
|
efdp->efd_format.efd_size = 1;
|
|
|
|
log_vector->i_addr = &efdp->efd_format;
|
|
log_vector->i_len = size;
|
|
log_vector->i_type = XLOG_REG_TYPE_EFD_FORMAT;
|
|
ASSERT(size >= sizeof(xfs_efd_log_format_t));
|
|
}
|
|
|
|
/*
|
|
* Pinning has no meaning for an efd item, so just return.
|
|
*/
|
|
STATIC void
|
|
xfs_efd_item_pin(
|
|
struct xfs_log_item *lip)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Since pinning has no meaning for an efd item, unpinning does
|
|
* not either.
|
|
*/
|
|
STATIC void
|
|
xfs_efd_item_unpin(
|
|
struct xfs_log_item *lip,
|
|
int remove)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* There isn't much you can do to push on an efd item. It is simply stuck
|
|
* waiting for the log to be flushed to disk.
|
|
*/
|
|
STATIC uint
|
|
xfs_efd_item_push(
|
|
struct xfs_log_item *lip,
|
|
struct list_head *buffer_list)
|
|
{
|
|
return XFS_ITEM_PINNED;
|
|
}
|
|
|
|
STATIC void
|
|
xfs_efd_item_unlock(
|
|
struct xfs_log_item *lip)
|
|
{
|
|
if (lip->li_flags & XFS_LI_ABORTED)
|
|
xfs_efd_item_free(EFD_ITEM(lip));
|
|
}
|
|
|
|
/*
|
|
* When the efd item is committed to disk, all we need to do
|
|
* is delete our reference to our partner efi item and then
|
|
* free ourselves. Since we're freeing ourselves we must
|
|
* return -1 to keep the transaction code from further referencing
|
|
* this item.
|
|
*/
|
|
STATIC xfs_lsn_t
|
|
xfs_efd_item_committed(
|
|
struct xfs_log_item *lip,
|
|
xfs_lsn_t lsn)
|
|
{
|
|
struct xfs_efd_log_item *efdp = EFD_ITEM(lip);
|
|
|
|
/*
|
|
* If we got a log I/O error, it's always the case that the LR with the
|
|
* EFI got unpinned and freed before the EFD got aborted.
|
|
*/
|
|
if (!(lip->li_flags & XFS_LI_ABORTED))
|
|
xfs_efi_release(efdp->efd_efip, efdp->efd_format.efd_nextents);
|
|
|
|
xfs_efd_item_free(efdp);
|
|
return (xfs_lsn_t)-1;
|
|
}
|
|
|
|
/*
|
|
* The EFD dependency tracking op doesn't do squat. It can't because
|
|
* it doesn't know where the free extent is coming from. The dependency
|
|
* tracking has to be handled by the "enclosing" metadata object. For
|
|
* example, for inodes, the inode is locked throughout the extent freeing
|
|
* so the dependency should be recorded there.
|
|
*/
|
|
STATIC void
|
|
xfs_efd_item_committing(
|
|
struct xfs_log_item *lip,
|
|
xfs_lsn_t lsn)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* This is the ops vector shared by all efd log items.
|
|
*/
|
|
static const struct xfs_item_ops xfs_efd_item_ops = {
|
|
.iop_size = xfs_efd_item_size,
|
|
.iop_format = xfs_efd_item_format,
|
|
.iop_pin = xfs_efd_item_pin,
|
|
.iop_unpin = xfs_efd_item_unpin,
|
|
.iop_unlock = xfs_efd_item_unlock,
|
|
.iop_committed = xfs_efd_item_committed,
|
|
.iop_push = xfs_efd_item_push,
|
|
.iop_committing = xfs_efd_item_committing
|
|
};
|
|
|
|
/*
|
|
* Allocate and initialize an efd item with the given number of extents.
|
|
*/
|
|
struct xfs_efd_log_item *
|
|
xfs_efd_init(
|
|
struct xfs_mount *mp,
|
|
struct xfs_efi_log_item *efip,
|
|
uint nextents)
|
|
|
|
{
|
|
struct xfs_efd_log_item *efdp;
|
|
uint size;
|
|
|
|
ASSERT(nextents > 0);
|
|
if (nextents > XFS_EFD_MAX_FAST_EXTENTS) {
|
|
size = (uint)(sizeof(xfs_efd_log_item_t) +
|
|
((nextents - 1) * sizeof(xfs_extent_t)));
|
|
efdp = kmem_zalloc(size, KM_SLEEP);
|
|
} else {
|
|
efdp = kmem_zone_zalloc(xfs_efd_zone, KM_SLEEP);
|
|
}
|
|
|
|
xfs_log_item_init(mp, &efdp->efd_item, XFS_LI_EFD, &xfs_efd_item_ops);
|
|
efdp->efd_efip = efip;
|
|
efdp->efd_format.efd_nextents = nextents;
|
|
efdp->efd_format.efd_efi_id = efip->efi_format.efi_id;
|
|
|
|
return efdp;
|
|
}
|