diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/xfs/xfs_extfree_item.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/xfs/xfs_extfree_item.c | 520 |
1 files changed, 0 insertions, 520 deletions
diff --git a/ANDROID_3.4.5/fs/xfs/xfs_extfree_item.c b/ANDROID_3.4.5/fs/xfs/xfs_extfree_item.c deleted file mode 100644 index 35c2aff3..00000000 --- a/ANDROID_3.4.5/fs/xfs/xfs_extfree_item.c +++ /dev/null @@ -1,520 +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_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 - * test_and_clear_bit(XFS_EFI_COMMITTED) 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 (!test_and_clear_bit(XFS_EFI_COMMITTED, &efip->efi_flags)) { - spin_lock(&ailp->xa_lock); - /* xfs_trans_ail_delete() drops the AIL lock. */ - xfs_trans_ail_delete(ailp, &efip->efi_item); - 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() (via - * XFS_EFI_COMMITTED) 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_trylock( - struct xfs_log_item *lip) -{ - return XFS_ITEM_PINNED; -} - -/* - * Efi items have no locking, so just return. - */ -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. For bulk transaction committed - * processing, the EFI may be processed but not yet unpinned prior to the EFD - * being processed. Set the XFS_EFI_COMMITTED flag so this case can be detected - * when processing the EFD. - */ -STATIC xfs_lsn_t -xfs_efi_item_committed( - struct xfs_log_item *lip, - xfs_lsn_t lsn) -{ - struct xfs_efi_log_item *efip = EFI_ITEM(lip); - - set_bit(XFS_EFI_COMMITTED, &efip->efi_flags); - return lsn; -} - -/* - * 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. - */ -STATIC void -xfs_efi_item_push( - struct xfs_log_item *lip) -{ -} - -/* - * 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_trylock = xfs_efi_item_trylock, - .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); - - 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)) - __xfs_efi_release(efip); -} - -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) -{ -} - -/* - * Efd items have no locking, so just return success. - */ -STATIC uint -xfs_efd_item_trylock( - struct xfs_log_item *lip) -{ - return XFS_ITEM_LOCKED; -} - -/* - * Efd items have no locking or pushing, so return failure - * so that the caller doesn't bother with us. - */ -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; -} - -/* - * 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 void -xfs_efd_item_push( - struct xfs_log_item *lip) -{ -} - -/* - * 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_trylock = xfs_efd_item_trylock, - .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; -} |