diff options
Diffstat (limited to 'fs/xfs/xfs_rmap_item.c')
| -rw-r--r-- | fs/xfs/xfs_rmap_item.c | 380 |
1 files changed, 233 insertions, 147 deletions
diff --git a/fs/xfs/xfs_rmap_item.c b/fs/xfs/xfs_rmap_item.c index 127dc9c32a54..77ed557b6127 100644 --- a/fs/xfs/xfs_rmap_item.c +++ b/fs/xfs/xfs_rmap_item.c @@ -14,7 +14,6 @@ #include "xfs_defer.h" #include "xfs_trans.h" #include "xfs_trans_priv.h" -#include "xfs_buf_item.h" #include "xfs_rmap_item.h" #include "xfs_log.h" #include "xfs_rmap.h" @@ -94,15 +93,6 @@ xfs_rui_item_format( } /* - * Pinning has no meaning for an rui item, so just return. - */ -STATIC void -xfs_rui_item_pin( - struct xfs_log_item *lip) -{ -} - -/* * The unpin operation is the last place an RUI is manipulated in the log. It is * either inserted in the AIL or aborted in the event of a log I/O error. In * either case, the RUI transaction has been successfully committed to make it @@ -121,71 +111,22 @@ xfs_rui_item_unpin( } /* - * RUI items have no locking or pushing. However, since RUIs are pulled from - * the AIL when their corresponding RUDs 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 RUI out of - * the AIL. - */ -STATIC uint -xfs_rui_item_push( - struct xfs_log_item *lip, - struct list_head *buffer_list) -{ - return XFS_ITEM_PINNED; -} - -/* * The RUI has been either committed or aborted if the transaction has been * cancelled. If the transaction was cancelled, an RUD isn't going to be * constructed and thus we free the RUI here directly. */ STATIC void -xfs_rui_item_unlock( +xfs_rui_item_release( struct xfs_log_item *lip) { - if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) - xfs_rui_release(RUI_ITEM(lip)); + xfs_rui_release(RUI_ITEM(lip)); } -/* - * The RUI 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_rui_item_committed( - struct xfs_log_item *lip, - xfs_lsn_t lsn) -{ - return lsn; -} - -/* - * The RUI 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_rui_item_committing( - struct xfs_log_item *lip, - xfs_lsn_t lsn) -{ -} - -/* - * This is the ops vector shared by all rui log items. - */ static const struct xfs_item_ops xfs_rui_item_ops = { .iop_size = xfs_rui_item_size, .iop_format = xfs_rui_item_format, - .iop_pin = xfs_rui_item_pin, .iop_unpin = xfs_rui_item_unpin, - .iop_unlock = xfs_rui_item_unlock, - .iop_committed = xfs_rui_item_committed, - .iop_push = xfs_rui_item_push, - .iop_committing = xfs_rui_item_committing, + .iop_release = xfs_rui_item_release, }; /* @@ -275,126 +216,271 @@ xfs_rud_item_format( } /* - * Pinning has no meaning for an rud item, so just return. + * The RUD is either committed or aborted if the transaction is cancelled. If + * the transaction is cancelled, drop our reference to the RUI and free the + * RUD. */ STATIC void -xfs_rud_item_pin( +xfs_rud_item_release( struct xfs_log_item *lip) { + struct xfs_rud_log_item *rudp = RUD_ITEM(lip); + + xfs_rui_release(rudp->rud_ruip); + kmem_zone_free(xfs_rud_zone, rudp); } -/* - * Since pinning has no meaning for an rud item, unpinning does - * not either. - */ -STATIC void -xfs_rud_item_unpin( - struct xfs_log_item *lip, - int remove) +static const struct xfs_item_ops xfs_rud_item_ops = { + .flags = XFS_ITEM_RELEASE_WHEN_COMMITTED, + .iop_size = xfs_rud_item_size, + .iop_format = xfs_rud_item_format, + .iop_release = xfs_rud_item_release, +}; + +static struct xfs_rud_log_item * +xfs_trans_get_rud( + struct xfs_trans *tp, + struct xfs_rui_log_item *ruip) { + struct xfs_rud_log_item *rudp; + + rudp = kmem_zone_zalloc(xfs_rud_zone, KM_SLEEP); + xfs_log_item_init(tp->t_mountp, &rudp->rud_item, XFS_LI_RUD, + &xfs_rud_item_ops); + rudp->rud_ruip = ruip; + rudp->rud_format.rud_rui_id = ruip->rui_format.rui_id; + + xfs_trans_add_item(tp, &rudp->rud_item); + return rudp; } -/* - * There isn't much you can do to push on an rud item. It is simply stuck - * waiting for the log to be flushed to disk. - */ -STATIC uint -xfs_rud_item_push( - struct xfs_log_item *lip, - struct list_head *buffer_list) +/* Set the map extent flags for this reverse mapping. */ +static void +xfs_trans_set_rmap_flags( + struct xfs_map_extent *rmap, + enum xfs_rmap_intent_type type, + int whichfork, + xfs_exntst_t state) { - return XFS_ITEM_PINNED; + rmap->me_flags = 0; + if (state == XFS_EXT_UNWRITTEN) + rmap->me_flags |= XFS_RMAP_EXTENT_UNWRITTEN; + if (whichfork == XFS_ATTR_FORK) + rmap->me_flags |= XFS_RMAP_EXTENT_ATTR_FORK; + switch (type) { + case XFS_RMAP_MAP: + rmap->me_flags |= XFS_RMAP_EXTENT_MAP; + break; + case XFS_RMAP_MAP_SHARED: + rmap->me_flags |= XFS_RMAP_EXTENT_MAP_SHARED; + break; + case XFS_RMAP_UNMAP: + rmap->me_flags |= XFS_RMAP_EXTENT_UNMAP; + break; + case XFS_RMAP_UNMAP_SHARED: + rmap->me_flags |= XFS_RMAP_EXTENT_UNMAP_SHARED; + break; + case XFS_RMAP_CONVERT: + rmap->me_flags |= XFS_RMAP_EXTENT_CONVERT; + break; + case XFS_RMAP_CONVERT_SHARED: + rmap->me_flags |= XFS_RMAP_EXTENT_CONVERT_SHARED; + break; + case XFS_RMAP_ALLOC: + rmap->me_flags |= XFS_RMAP_EXTENT_ALLOC; + break; + case XFS_RMAP_FREE: + rmap->me_flags |= XFS_RMAP_EXTENT_FREE; + break; + default: + ASSERT(0); + } } /* - * The RUD is either committed or aborted if the transaction is cancelled. If - * the transaction is cancelled, drop our reference to the RUI and free the - * RUD. + * Finish an rmap update and log it to the RUD. Note that the transaction is + * marked dirty regardless of whether the rmap update succeeds or fails to + * support the RUI/RUD lifecycle rules. */ -STATIC void -xfs_rud_item_unlock( - struct xfs_log_item *lip) +static int +xfs_trans_log_finish_rmap_update( + struct xfs_trans *tp, + struct xfs_rud_log_item *rudp, + enum xfs_rmap_intent_type type, + uint64_t owner, + int whichfork, + xfs_fileoff_t startoff, + xfs_fsblock_t startblock, + xfs_filblks_t blockcount, + xfs_exntst_t state, + struct xfs_btree_cur **pcur) { - struct xfs_rud_log_item *rudp = RUD_ITEM(lip); + int error; - if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) { - xfs_rui_release(rudp->rud_ruip); - kmem_zone_free(xfs_rud_zone, rudp); - } + error = xfs_rmap_finish_one(tp, type, owner, whichfork, startoff, + startblock, blockcount, state, pcur); + + /* + * Mark the transaction dirty, even on error. This ensures the + * transaction is aborted, which: + * + * 1.) releases the RUI and frees the RUD + * 2.) shuts down the filesystem + */ + tp->t_flags |= XFS_TRANS_DIRTY; + set_bit(XFS_LI_DIRTY, &rudp->rud_item.li_flags); + + return error; } -/* - * When the rud item is committed to disk, all we need to do is delete our - * reference to our partner rui 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_rud_item_committed( - struct xfs_log_item *lip, - xfs_lsn_t lsn) +/* Sort rmap intents by AG. */ +static int +xfs_rmap_update_diff_items( + void *priv, + struct list_head *a, + struct list_head *b) { - struct xfs_rud_log_item *rudp = RUD_ITEM(lip); + struct xfs_mount *mp = priv; + struct xfs_rmap_intent *ra; + struct xfs_rmap_intent *rb; + + ra = container_of(a, struct xfs_rmap_intent, ri_list); + rb = container_of(b, struct xfs_rmap_intent, ri_list); + return XFS_FSB_TO_AGNO(mp, ra->ri_bmap.br_startblock) - + XFS_FSB_TO_AGNO(mp, rb->ri_bmap.br_startblock); +} + +/* Get an RUI. */ +STATIC void * +xfs_rmap_update_create_intent( + struct xfs_trans *tp, + unsigned int count) +{ + struct xfs_rui_log_item *ruip; + + ASSERT(tp != NULL); + ASSERT(count > 0); + + ruip = xfs_rui_init(tp->t_mountp, count); + ASSERT(ruip != NULL); /* - * Drop the RUI reference regardless of whether the RUD has been - * aborted. Once the RUD transaction is constructed, it is the sole - * responsibility of the RUD to release the RUI (even if the RUI is - * aborted due to log I/O error). + * Get a log_item_desc to point at the new item. */ - xfs_rui_release(rudp->rud_ruip); - kmem_zone_free(xfs_rud_zone, rudp); - - return (xfs_lsn_t)-1; + xfs_trans_add_item(tp, &ruip->rui_item); + return ruip; } -/* - * The RUD 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. - */ +/* Log rmap updates in the intent item. */ STATIC void -xfs_rud_item_committing( - struct xfs_log_item *lip, - xfs_lsn_t lsn) +xfs_rmap_update_log_item( + struct xfs_trans *tp, + void *intent, + struct list_head *item) { + struct xfs_rui_log_item *ruip = intent; + struct xfs_rmap_intent *rmap; + uint next_extent; + struct xfs_map_extent *map; + + rmap = container_of(item, struct xfs_rmap_intent, ri_list); + + tp->t_flags |= XFS_TRANS_DIRTY; + set_bit(XFS_LI_DIRTY, &ruip->rui_item.li_flags); + + /* + * atomic_inc_return gives us the value after the increment; + * we want to use it as an array index so we need to subtract 1 from + * it. + */ + next_extent = atomic_inc_return(&ruip->rui_next_extent) - 1; + ASSERT(next_extent < ruip->rui_format.rui_nextents); + map = &ruip->rui_format.rui_extents[next_extent]; + map->me_owner = rmap->ri_owner; + map->me_startblock = rmap->ri_bmap.br_startblock; + map->me_startoff = rmap->ri_bmap.br_startoff; + map->me_len = rmap->ri_bmap.br_blockcount; + xfs_trans_set_rmap_flags(map, rmap->ri_type, rmap->ri_whichfork, + rmap->ri_bmap.br_state); } -/* - * This is the ops vector shared by all rud log items. - */ -static const struct xfs_item_ops xfs_rud_item_ops = { - .iop_size = xfs_rud_item_size, - .iop_format = xfs_rud_item_format, - .iop_pin = xfs_rud_item_pin, - .iop_unpin = xfs_rud_item_unpin, - .iop_unlock = xfs_rud_item_unlock, - .iop_committed = xfs_rud_item_committed, - .iop_push = xfs_rud_item_push, - .iop_committing = xfs_rud_item_committing, -}; +/* Get an RUD so we can process all the deferred rmap updates. */ +STATIC void * +xfs_rmap_update_create_done( + struct xfs_trans *tp, + void *intent, + unsigned int count) +{ + return xfs_trans_get_rud(tp, intent); +} -/* - * Allocate and initialize an rud item with the given number of extents. - */ -struct xfs_rud_log_item * -xfs_rud_init( - struct xfs_mount *mp, - struct xfs_rui_log_item *ruip) +/* Process a deferred rmap update. */ +STATIC int +xfs_rmap_update_finish_item( + struct xfs_trans *tp, + struct list_head *item, + void *done_item, + void **state) +{ + struct xfs_rmap_intent *rmap; + int error; + + rmap = container_of(item, struct xfs_rmap_intent, ri_list); + error = xfs_trans_log_finish_rmap_update(tp, done_item, + rmap->ri_type, + rmap->ri_owner, rmap->ri_whichfork, + rmap->ri_bmap.br_startoff, + rmap->ri_bmap.br_startblock, + rmap->ri_bmap.br_blockcount, + rmap->ri_bmap.br_state, + (struct xfs_btree_cur **)state); + kmem_free(rmap); + return error; +} + +/* Clean up after processing deferred rmaps. */ +STATIC void +xfs_rmap_update_finish_cleanup( + struct xfs_trans *tp, + void *state, + int error) +{ + struct xfs_btree_cur *rcur = state; + + xfs_rmap_finish_one_cleanup(tp, rcur, error); +} +/* Abort all pending RUIs. */ +STATIC void +xfs_rmap_update_abort_intent( + void *intent) { - struct xfs_rud_log_item *rudp; + xfs_rui_release(intent); +} - rudp = kmem_zone_zalloc(xfs_rud_zone, KM_SLEEP); - xfs_log_item_init(mp, &rudp->rud_item, XFS_LI_RUD, &xfs_rud_item_ops); - rudp->rud_ruip = ruip; - rudp->rud_format.rud_rui_id = ruip->rui_format.rui_id; +/* Cancel a deferred rmap update. */ +STATIC void +xfs_rmap_update_cancel_item( + struct list_head *item) +{ + struct xfs_rmap_intent *rmap; - return rudp; + rmap = container_of(item, struct xfs_rmap_intent, ri_list); + kmem_free(rmap); } +const struct xfs_defer_op_type xfs_rmap_update_defer_type = { + .max_items = XFS_RUI_MAX_FAST_EXTENTS, + .diff_items = xfs_rmap_update_diff_items, + .create_intent = xfs_rmap_update_create_intent, + .abort_intent = xfs_rmap_update_abort_intent, + .log_item = xfs_rmap_update_log_item, + .create_done = xfs_rmap_update_create_done, + .finish_item = xfs_rmap_update_finish_item, + .finish_cleanup = xfs_rmap_update_finish_cleanup, + .cancel_item = xfs_rmap_update_cancel_item, +}; + /* * Process an rmap update intent item that was recovered from the log. * We need to update the rmapbt. |