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Diffstat (limited to 'fs/xfs/xfs_trans_item.c')
-rw-r--r--fs/xfs/xfs_trans_item.c441
1 files changed, 0 insertions, 441 deletions
diff --git a/fs/xfs/xfs_trans_item.c b/fs/xfs/xfs_trans_item.c
deleted file mode 100644
index f11d37d06dc..00000000000
--- a/fs/xfs/xfs_trans_item.c
+++ /dev/null
@@ -1,441 +0,0 @@
-/*
- * Copyright (c) 2000-2002,2005 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_trans_priv.h"
-/* XXX: from here down needed until struct xfs_trans has its own ailp */
-#include "xfs_bit.h"
-#include "xfs_buf_item.h"
-#include "xfs_sb.h"
-#include "xfs_ag.h"
-#include "xfs_dir2.h"
-#include "xfs_dmapi.h"
-#include "xfs_mount.h"
-
-STATIC int xfs_trans_unlock_chunk(xfs_log_item_chunk_t *,
- int, int, xfs_lsn_t);
-
-/*
- * This is called to add the given log item to the transaction's
- * list of log items. It must find a free log item descriptor
- * or allocate a new one and add the item to that descriptor.
- * The function returns a pointer to item descriptor used to point
- * to the new item. The log item will now point to its new descriptor
- * with its li_desc field.
- */
-xfs_log_item_desc_t *
-xfs_trans_add_item(xfs_trans_t *tp, xfs_log_item_t *lip)
-{
- xfs_log_item_desc_t *lidp;
- xfs_log_item_chunk_t *licp;
- int i=0;
-
- /*
- * If there are no free descriptors, allocate a new chunk
- * of them and put it at the front of the chunk list.
- */
- if (tp->t_items_free == 0) {
- licp = (xfs_log_item_chunk_t*)
- kmem_alloc(sizeof(xfs_log_item_chunk_t), KM_SLEEP);
- ASSERT(licp != NULL);
- /*
- * Initialize the chunk, and then
- * claim the first slot in the newly allocated chunk.
- */
- xfs_lic_init(licp);
- xfs_lic_claim(licp, 0);
- licp->lic_unused = 1;
- xfs_lic_init_slot(licp, 0);
- lidp = xfs_lic_slot(licp, 0);
-
- /*
- * Link in the new chunk and update the free count.
- */
- licp->lic_next = tp->t_items.lic_next;
- tp->t_items.lic_next = licp;
- tp->t_items_free = XFS_LIC_NUM_SLOTS - 1;
-
- /*
- * Initialize the descriptor and the generic portion
- * of the log item.
- *
- * Point the new slot at this item and return it.
- * Also point the log item at its currently active
- * descriptor and set the item's mount pointer.
- */
- lidp->lid_item = lip;
- lidp->lid_flags = 0;
- lidp->lid_size = 0;
- lip->li_desc = lidp;
- lip->li_mountp = tp->t_mountp;
- lip->li_ailp = tp->t_mountp->m_ail;
- return lidp;
- }
-
- /*
- * Find the free descriptor. It is somewhere in the chunklist
- * of descriptors.
- */
- licp = &tp->t_items;
- while (licp != NULL) {
- if (xfs_lic_vacancy(licp)) {
- if (licp->lic_unused <= XFS_LIC_MAX_SLOT) {
- i = licp->lic_unused;
- ASSERT(xfs_lic_isfree(licp, i));
- break;
- }
- for (i = 0; i <= XFS_LIC_MAX_SLOT; i++) {
- if (xfs_lic_isfree(licp, i))
- break;
- }
- ASSERT(i <= XFS_LIC_MAX_SLOT);
- break;
- }
- licp = licp->lic_next;
- }
- ASSERT(licp != NULL);
- /*
- * If we find a free descriptor, claim it,
- * initialize it, and return it.
- */
- xfs_lic_claim(licp, i);
- if (licp->lic_unused <= i) {
- licp->lic_unused = i + 1;
- xfs_lic_init_slot(licp, i);
- }
- lidp = xfs_lic_slot(licp, i);
- tp->t_items_free--;
- lidp->lid_item = lip;
- lidp->lid_flags = 0;
- lidp->lid_size = 0;
- lip->li_desc = lidp;
- lip->li_mountp = tp->t_mountp;
- lip->li_ailp = tp->t_mountp->m_ail;
- return lidp;
-}
-
-/*
- * Free the given descriptor.
- *
- * This requires setting the bit in the chunk's free mask corresponding
- * to the given slot.
- */
-void
-xfs_trans_free_item(xfs_trans_t *tp, xfs_log_item_desc_t *lidp)
-{
- uint slot;
- xfs_log_item_chunk_t *licp;
- xfs_log_item_chunk_t **licpp;
-
- slot = xfs_lic_desc_to_slot(lidp);
- licp = xfs_lic_desc_to_chunk(lidp);
- xfs_lic_relse(licp, slot);
- lidp->lid_item->li_desc = NULL;
- tp->t_items_free++;
-
- /*
- * If there are no more used items in the chunk and this is not
- * the chunk embedded in the transaction structure, then free
- * the chunk. First pull it from the chunk list and then
- * free it back to the heap. We didn't bother with a doubly
- * linked list here because the lists should be very short
- * and this is not a performance path. It's better to save
- * the memory of the extra pointer.
- *
- * Also decrement the transaction structure's count of free items
- * by the number in a chunk since we are freeing an empty chunk.
- */
- if (xfs_lic_are_all_free(licp) && (licp != &(tp->t_items))) {
- licpp = &(tp->t_items.lic_next);
- while (*licpp != licp) {
- ASSERT(*licpp != NULL);
- licpp = &((*licpp)->lic_next);
- }
- *licpp = licp->lic_next;
- kmem_free(licp);
- tp->t_items_free -= XFS_LIC_NUM_SLOTS;
- }
-}
-
-/*
- * This is called to find the descriptor corresponding to the given
- * log item. It returns a pointer to the descriptor.
- * The log item MUST have a corresponding descriptor in the given
- * transaction. This routine does not return NULL, it panics.
- *
- * The descriptor pointer is kept in the log item's li_desc field.
- * Just return it.
- */
-/*ARGSUSED*/
-xfs_log_item_desc_t *
-xfs_trans_find_item(xfs_trans_t *tp, xfs_log_item_t *lip)
-{
- ASSERT(lip->li_desc != NULL);
-
- return lip->li_desc;
-}
-
-
-/*
- * Return a pointer to the first descriptor in the chunk list.
- * This does not return NULL if there are none, it panics.
- *
- * The first descriptor must be in either the first or second chunk.
- * This is because the only chunk allowed to be empty is the first.
- * All others are freed when they become empty.
- *
- * At some point this and xfs_trans_next_item() should be optimized
- * to quickly look at the mask to determine if there is anything to
- * look at.
- */
-xfs_log_item_desc_t *
-xfs_trans_first_item(xfs_trans_t *tp)
-{
- xfs_log_item_chunk_t *licp;
- int i;
-
- licp = &tp->t_items;
- /*
- * If it's not in the first chunk, skip to the second.
- */
- if (xfs_lic_are_all_free(licp)) {
- licp = licp->lic_next;
- }
-
- /*
- * Return the first non-free descriptor in the chunk.
- */
- ASSERT(!xfs_lic_are_all_free(licp));
- for (i = 0; i < licp->lic_unused; i++) {
- if (xfs_lic_isfree(licp, i)) {
- continue;
- }
-
- return xfs_lic_slot(licp, i);
- }
- cmn_err(CE_WARN, "xfs_trans_first_item() -- no first item");
- return NULL;
-}
-
-
-/*
- * Given a descriptor, return the next descriptor in the chunk list.
- * This returns NULL if there are no more used descriptors in the list.
- *
- * We do this by first locating the chunk in which the descriptor resides,
- * and then scanning forward in the chunk and the list for the next
- * used descriptor.
- */
-/*ARGSUSED*/
-xfs_log_item_desc_t *
-xfs_trans_next_item(xfs_trans_t *tp, xfs_log_item_desc_t *lidp)
-{
- xfs_log_item_chunk_t *licp;
- int i;
-
- licp = xfs_lic_desc_to_chunk(lidp);
-
- /*
- * First search the rest of the chunk. The for loop keeps us
- * from referencing things beyond the end of the chunk.
- */
- for (i = (int)xfs_lic_desc_to_slot(lidp) + 1; i < licp->lic_unused; i++) {
- if (xfs_lic_isfree(licp, i)) {
- continue;
- }
-
- return xfs_lic_slot(licp, i);
- }
-
- /*
- * Now search the next chunk. It must be there, because the
- * next chunk would have been freed if it were empty.
- * If there is no next chunk, return NULL.
- */
- if (licp->lic_next == NULL) {
- return NULL;
- }
-
- licp = licp->lic_next;
- ASSERT(!xfs_lic_are_all_free(licp));
- for (i = 0; i < licp->lic_unused; i++) {
- if (xfs_lic_isfree(licp, i)) {
- continue;
- }
-
- return xfs_lic_slot(licp, i);
- }
- ASSERT(0);
- /* NOTREACHED */
- return NULL; /* keep gcc quite */
-}
-
-/*
- * This is called to unlock all of the items of a transaction and to free
- * all the descriptors of that transaction.
- *
- * It walks the list of descriptors and unlocks each item. It frees
- * each chunk except that embedded in the transaction as it goes along.
- */
-void
-xfs_trans_free_items(
- xfs_trans_t *tp,
- xfs_lsn_t commit_lsn,
- int flags)
-{
- xfs_log_item_chunk_t *licp;
- xfs_log_item_chunk_t *next_licp;
- int abort;
-
- abort = flags & XFS_TRANS_ABORT;
- licp = &tp->t_items;
- /*
- * Special case the embedded chunk so we don't free it below.
- */
- if (!xfs_lic_are_all_free(licp)) {
- (void) xfs_trans_unlock_chunk(licp, 1, abort, commit_lsn);
- xfs_lic_all_free(licp);
- licp->lic_unused = 0;
- }
- licp = licp->lic_next;
-
- /*
- * Unlock each item in each chunk and free the chunks.
- */
- while (licp != NULL) {
- ASSERT(!xfs_lic_are_all_free(licp));
- (void) xfs_trans_unlock_chunk(licp, 1, abort, commit_lsn);
- next_licp = licp->lic_next;
- kmem_free(licp);
- licp = next_licp;
- }
-
- /*
- * Reset the transaction structure's free item count.
- */
- tp->t_items_free = XFS_LIC_NUM_SLOTS;
- tp->t_items.lic_next = NULL;
-}
-
-
-
-/*
- * This is called to unlock the items associated with a transaction.
- * Items which were not logged should be freed.
- * Those which were logged must still be tracked so they can be unpinned
- * when the transaction commits.
- */
-void
-xfs_trans_unlock_items(xfs_trans_t *tp, xfs_lsn_t commit_lsn)
-{
- xfs_log_item_chunk_t *licp;
- xfs_log_item_chunk_t *next_licp;
- xfs_log_item_chunk_t **licpp;
- int freed;
-
- freed = 0;
- licp = &tp->t_items;
-
- /*
- * Special case the embedded chunk so we don't free.
- */
- if (!xfs_lic_are_all_free(licp)) {
- freed = xfs_trans_unlock_chunk(licp, 0, 0, commit_lsn);
- }
- licpp = &(tp->t_items.lic_next);
- licp = licp->lic_next;
-
- /*
- * Unlock each item in each chunk, free non-dirty descriptors,
- * and free empty chunks.
- */
- while (licp != NULL) {
- ASSERT(!xfs_lic_are_all_free(licp));
- freed += xfs_trans_unlock_chunk(licp, 0, 0, commit_lsn);
- next_licp = licp->lic_next;
- if (xfs_lic_are_all_free(licp)) {
- *licpp = next_licp;
- kmem_free(licp);
- freed -= XFS_LIC_NUM_SLOTS;
- } else {
- licpp = &(licp->lic_next);
- }
- ASSERT(*licpp == next_licp);
- licp = next_licp;
- }
-
- /*
- * Fix the free descriptor count in the transaction.
- */
- tp->t_items_free += freed;
-}
-
-/*
- * Unlock each item pointed to by a descriptor in the given chunk.
- * Stamp the commit lsn into each item if necessary.
- * Free descriptors pointing to items which are not dirty if freeing_chunk
- * is zero. If freeing_chunk is non-zero, then we need to unlock all
- * items in the chunk.
- *
- * Return the number of descriptors freed.
- */
-STATIC int
-xfs_trans_unlock_chunk(
- xfs_log_item_chunk_t *licp,
- int freeing_chunk,
- int abort,
- xfs_lsn_t commit_lsn)
-{
- xfs_log_item_desc_t *lidp;
- xfs_log_item_t *lip;
- int i;
- int freed;
-
- freed = 0;
- lidp = licp->lic_descs;
- for (i = 0; i < licp->lic_unused; i++, lidp++) {
- if (xfs_lic_isfree(licp, i)) {
- continue;
- }
- lip = lidp->lid_item;
- lip->li_desc = NULL;
-
- if (commit_lsn != NULLCOMMITLSN)
- IOP_COMMITTING(lip, commit_lsn);
- if (abort)
- lip->li_flags |= XFS_LI_ABORTED;
- IOP_UNLOCK(lip);
-
- /*
- * Free the descriptor if the item is not dirty
- * within this transaction and the caller is not
- * going to just free the entire thing regardless.
- */
- if (!(freeing_chunk) &&
- (!(lidp->lid_flags & XFS_LID_DIRTY) || abort)) {
- xfs_lic_relse(licp, i);
- freed++;
- }
- }
-
- return freed;
-}
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