diff options
Diffstat (limited to 'sys/gnu/fs/xfs/xfs_extfree_item.c')
| -rw-r--r-- | sys/gnu/fs/xfs/xfs_extfree_item.c | 587 |
1 files changed, 0 insertions, 587 deletions
diff --git a/sys/gnu/fs/xfs/xfs_extfree_item.c b/sys/gnu/fs/xfs/xfs_extfree_item.c deleted file mode 100644 index f19282e..0000000 --- a/sys/gnu/fs/xfs/xfs_extfree_item.c +++ /dev/null @@ -1,587 +0,0 @@ -/* - * 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_inum.h" -#include "xfs_trans.h" -#include "xfs_buf_item.h" -#include "xfs_sb.h" -#include "xfs_dir.h" -#include "xfs_dmapi.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 void xfs_efi_item_unlock(xfs_efi_log_item_t *); -STATIC void xfs_efi_item_abort(xfs_efi_log_item_t *); -STATIC void xfs_efd_item_abort(xfs_efd_log_item_t *); - - -void -xfs_efi_item_free(xfs_efi_log_item_t *efip) -{ - int nexts = efip->efi_format.efi_nextents; - - if (nexts > XFS_EFI_MAX_FAST_EXTENTS) { - kmem_free(efip, sizeof(xfs_efi_log_item_t) + - (nexts - 1) * sizeof(xfs_extent_t)); - } else { - kmem_zone_free(xfs_efi_zone, 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. - */ -/*ARGSUSED*/ -STATIC uint -xfs_efi_item_size(xfs_efi_log_item_t *efip) -{ - 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(xfs_efi_log_item_t *efip, - xfs_log_iovec_t *log_vector) -{ - uint size; - - ASSERT(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 = (xfs_caddr_t)&(efip->efi_format); - log_vector->i_len = size; - XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_EFI_FORMAT); - ASSERT(size >= sizeof(xfs_efi_log_format_t)); -} - - -/* - * Pinning has no meaning for an efi item, so just return. - */ -/*ARGSUSED*/ -STATIC void -xfs_efi_item_pin(xfs_efi_log_item_t *efip) -{ - return; -} - - -/* - * While EFIs cannot really be pinned, the unpin operation is the - * last place at which the EFI is manipulated during a transaction. - * 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, int stale) -{ - xfs_mount_t *mp; - SPLDECL(s); - - mp = efip->efi_item.li_mountp; - AIL_LOCK(mp, s); - if (efip->efi_flags & XFS_EFI_CANCELED) { - /* - * xfs_trans_delete_ail() drops the AIL lock. - */ - xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s); - xfs_efi_item_free(efip); - } else { - efip->efi_flags |= XFS_EFI_COMMITTED; - AIL_UNLOCK(mp, s); - } -} - -/* - * 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_mount_t *mp; - xfs_log_item_desc_t *lidp; - SPLDECL(s); - - mp = efip->efi_item.li_mountp; - AIL_LOCK(mp, s); - if (efip->efi_flags & XFS_EFI_CANCELED) { - /* - * free the xaction descriptor pointing to this item - */ - lidp = xfs_trans_find_item(tp, (xfs_log_item_t *) efip); - xfs_trans_free_item(tp, lidp); - /* - * pull the item off the AIL. - * xfs_trans_delete_ail() drops the AIL lock. - */ - xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s); - xfs_efi_item_free(efip); - } else { - efip->efi_flags |= XFS_EFI_COMMITTED; - AIL_UNLOCK(mp, s); - } -} - -/* - * 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. - */ -/*ARGSUSED*/ -STATIC uint -xfs_efi_item_trylock(xfs_efi_log_item_t *efip) -{ - return XFS_ITEM_PINNED; -} - -/* - * Efi items have no locking, so just return. - */ -/*ARGSUSED*/ -STATIC void -xfs_efi_item_unlock(xfs_efi_log_item_t *efip) -{ - if (efip->efi_item.li_flags & XFS_LI_ABORTED) - xfs_efi_item_abort(efip); - return; -} - -/* - * The EFI is logged only once and cannot be moved in the log, so - * simply return the lsn at which it's been logged. The canceled - * flag is not paid any attention here. Checking for that is delayed - * until the EFI is unpinned. - */ -/*ARGSUSED*/ -STATIC xfs_lsn_t -xfs_efi_item_committed(xfs_efi_log_item_t *efip, xfs_lsn_t lsn) -{ - return lsn; -} - -/* - * This is called when the transaction logging the EFI is aborted. - * Free up the EFI and return. No need to clean up the slot for - * the item in the transaction. That was done by the unpin code - * which is called prior to this routine in the abort/fs-shutdown path. - */ -STATIC void -xfs_efi_item_abort(xfs_efi_log_item_t *efip) -{ - xfs_efi_item_free(efip); -} - -/* - * There isn't much you can do to push on an efi item. It is simply - * stuck waiting for all of its corresponding efd items to be - * committed to disk. - */ -/*ARGSUSED*/ -STATIC void -xfs_efi_item_push(xfs_efi_log_item_t *efip) -{ - return; -} - -/* - * 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. - */ -/*ARGSUSED*/ -STATIC void -xfs_efi_item_committing(xfs_efi_log_item_t *efip, xfs_lsn_t lsn) -{ - return; -} - -/* - * This is the ops vector shared by all efi log items. - */ -STATIC struct xfs_item_ops xfs_efi_item_ops = { - .iop_size = (uint(*)(xfs_log_item_t*))xfs_efi_item_size, - .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*, int))xfs_efi_item_unpin, - .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t *)) - xfs_efi_item_unpin_remove, - .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)) - xfs_efi_item_committed, - .iop_push = (void(*)(xfs_log_item_t*))xfs_efi_item_push, - .iop_abort = (void(*)(xfs_log_item_t*))xfs_efi_item_abort, - .iop_pushbuf = NULL, - .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) - xfs_efi_item_committing -}; - - -/* - * Allocate and initialize an efi item with the given number of extents. - */ -xfs_efi_log_item_t * -xfs_efi_init(xfs_mount_t *mp, - uint nextents) - -{ - xfs_efi_log_item_t *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 = (xfs_efi_log_item_t*)kmem_zalloc(size, KM_SLEEP); - } else { - efip = (xfs_efi_log_item_t*)kmem_zone_zalloc(xfs_efi_zone, - KM_SLEEP); - } - - efip->efi_item.li_type = XFS_LI_EFI; - efip->efi_item.li_ops = &xfs_efi_item_ops; - efip->efi_item.li_mountp = mp; - efip->efi_format.efi_nextents = nextents; - efip->efi_format.efi_id = (__psint_t)(void*)efip; - - return (efip); -} - -/* - * 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. - * - * Freeing the efi item requires that we remove it from the AIL. - * We'll use the AIL lock to protect our counters as well as - * the removal from the AIL. - */ -void -xfs_efi_release(xfs_efi_log_item_t *efip, - uint nextents) -{ - xfs_mount_t *mp; - int extents_left; - SPLDECL(s); - - mp = efip->efi_item.li_mountp; - ASSERT(efip->efi_next_extent > 0); - ASSERT(efip->efi_flags & XFS_EFI_COMMITTED); - - AIL_LOCK(mp, s); - ASSERT(efip->efi_next_extent >= nextents); - efip->efi_next_extent -= nextents; - extents_left = efip->efi_next_extent; - if (extents_left == 0) { - /* - * xfs_trans_delete_ail() drops the AIL lock. - */ - xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s); - xfs_efi_item_free(efip); - } else { - AIL_UNLOCK(mp, s); - } -} - -/* - * This is called when the transaction that should be committing the - * EFD corresponding to the given EFI is aborted. The committed and - * canceled flags are used to coordinate the freeing of the EFI and - * the references by the transaction that committed it. - */ -STATIC void -xfs_efi_cancel( - xfs_efi_log_item_t *efip) -{ - xfs_mount_t *mp; - SPLDECL(s); - - mp = efip->efi_item.li_mountp; - AIL_LOCK(mp, s); - if (efip->efi_flags & XFS_EFI_COMMITTED) { - /* - * xfs_trans_delete_ail() drops the AIL lock. - */ - xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s); - xfs_efi_item_free(efip); - } else { - efip->efi_flags |= XFS_EFI_CANCELED; - AIL_UNLOCK(mp, s); - } -} - -STATIC void -xfs_efd_item_free(xfs_efd_log_item_t *efdp) -{ - int nexts = efdp->efd_format.efd_nextents; - - if (nexts > XFS_EFD_MAX_FAST_EXTENTS) { - kmem_free(efdp, sizeof(xfs_efd_log_item_t) + - (nexts - 1) * sizeof(xfs_extent_t)); - } 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. - */ -/*ARGSUSED*/ -STATIC uint -xfs_efd_item_size(xfs_efd_log_item_t *efdp) -{ - 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(xfs_efd_log_item_t *efdp, - xfs_log_iovec_t *log_vector) -{ - 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 = (xfs_caddr_t)&(efdp->efd_format); - log_vector->i_len = size; - XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_EFD_FORMAT); - ASSERT(size >= sizeof(xfs_efd_log_format_t)); -} - - -/* - * Pinning has no meaning for an efd item, so just return. - */ -/*ARGSUSED*/ -STATIC void -xfs_efd_item_pin(xfs_efd_log_item_t *efdp) -{ - return; -} - - -/* - * Since pinning has no meaning for an efd item, unpinning does - * not either. - */ -/*ARGSUSED*/ -STATIC void -xfs_efd_item_unpin(xfs_efd_log_item_t *efdp, int stale) -{ - return; -} - -/*ARGSUSED*/ -STATIC void -xfs_efd_item_unpin_remove(xfs_efd_log_item_t *efdp, xfs_trans_t *tp) -{ - return; -} - -/* - * Efd items have no locking, so just return success. - */ -/*ARGSUSED*/ -STATIC uint -xfs_efd_item_trylock(xfs_efd_log_item_t *efdp) -{ - return XFS_ITEM_LOCKED; -} - -/* - * Efd items have no locking or pushing, so return failure - * so that the caller doesn't bother with us. - */ -/*ARGSUSED*/ -STATIC void -xfs_efd_item_unlock(xfs_efd_log_item_t *efdp) -{ - if (efdp->efd_item.li_flags & XFS_LI_ABORTED) - xfs_efd_item_abort(efdp); - return; -} - -/* - * 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. - */ -/*ARGSUSED*/ -STATIC xfs_lsn_t -xfs_efd_item_committed(xfs_efd_log_item_t *efdp, xfs_lsn_t lsn) -{ - /* - * 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 ((efdp->efd_item.li_flags & XFS_LI_ABORTED) == 0) - xfs_efi_release(efdp->efd_efip, efdp->efd_format.efd_nextents); - - xfs_efd_item_free(efdp); - return (xfs_lsn_t)-1; -} - -/* - * The transaction of which this EFD is a part has been aborted. - * Inform its companion EFI of this fact and then clean up after - * ourselves. No need to clean up the slot for the item in the - * transaction. That was done by the unpin code which is called - * prior to this routine in the abort/fs-shutdown path. - */ -STATIC void -xfs_efd_item_abort(xfs_efd_log_item_t *efdp) -{ - /* - * 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. So don't - * reference the EFI at all in that case. - */ - if ((efdp->efd_item.li_flags & XFS_LI_ABORTED) == 0) - xfs_efi_cancel(efdp->efd_efip); - - xfs_efd_item_free(efdp); -} - -/* - * 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. - */ -/*ARGSUSED*/ -STATIC void -xfs_efd_item_push(xfs_efd_log_item_t *efdp) -{ - return; -} - -/* - * 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. - */ -/*ARGSUSED*/ -STATIC void -xfs_efd_item_committing(xfs_efd_log_item_t *efip, xfs_lsn_t lsn) -{ - return; -} - -/* - * This is the ops vector shared by all efd log items. - */ -STATIC struct xfs_item_ops xfs_efd_item_ops = { - .iop_size = (uint(*)(xfs_log_item_t*))xfs_efd_item_size, - .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*, int))xfs_efd_item_unpin, - .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*)) - xfs_efd_item_unpin_remove, - .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)) - xfs_efd_item_committed, - .iop_push = (void(*)(xfs_log_item_t*))xfs_efd_item_push, - .iop_abort = (void(*)(xfs_log_item_t*))xfs_efd_item_abort, - .iop_pushbuf = NULL, - .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) - xfs_efd_item_committing -}; - - -/* - * Allocate and initialize an efd item with the given number of extents. - */ -xfs_efd_log_item_t * -xfs_efd_init(xfs_mount_t *mp, - xfs_efi_log_item_t *efip, - uint nextents) - -{ - xfs_efd_log_item_t *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 = (xfs_efd_log_item_t*)kmem_zalloc(size, KM_SLEEP); - } else { - efdp = (xfs_efd_log_item_t*)kmem_zone_zalloc(xfs_efd_zone, - KM_SLEEP); - } - - efdp->efd_item.li_type = XFS_LI_EFD; - efdp->efd_item.li_ops = &xfs_efd_item_ops; - efdp->efd_item.li_mountp = mp; - efdp->efd_efip = efip; - efdp->efd_format.efd_nextents = nextents; - efdp->efd_format.efd_efi_id = efip->efi_format.efi_id; - - return (efdp); -} |
