diff options
Diffstat (limited to 'fs/xfs/xfs_trans_refcount.c')
| -rw-r--r-- | fs/xfs/xfs_trans_refcount.c | 188 |
1 files changed, 186 insertions, 2 deletions
diff --git a/fs/xfs/xfs_trans_refcount.c b/fs/xfs/xfs_trans_refcount.c index b18d548c1aae..94c1877af834 100644 --- a/fs/xfs/xfs_trans_refcount.c +++ b/fs/xfs/xfs_trans_refcount.c @@ -56,15 +56,18 @@ int xfs_trans_log_finish_refcount_update( struct xfs_trans *tp, struct xfs_cud_log_item *cudp, + struct xfs_defer_ops *dop, enum xfs_refcount_intent_type type, xfs_fsblock_t startblock, xfs_extlen_t blockcount, + xfs_fsblock_t *new_fsb, + xfs_extlen_t *new_len, struct xfs_btree_cur **pcur) { int error; - /* XXX: leave this empty for now */ - error = -EFSCORRUPTED; + error = xfs_refcount_finish_one(tp, dop, type, startblock, + blockcount, new_fsb, new_len, pcur); /* * Mark the transaction dirty, even on error. This ensures the @@ -78,3 +81,184 @@ xfs_trans_log_finish_refcount_update( return error; } + +/* Sort refcount intents by AG. */ +static int +xfs_refcount_update_diff_items( + void *priv, + struct list_head *a, + struct list_head *b) +{ + struct xfs_mount *mp = priv; + struct xfs_refcount_intent *ra; + struct xfs_refcount_intent *rb; + + ra = container_of(a, struct xfs_refcount_intent, ri_list); + rb = container_of(b, struct xfs_refcount_intent, ri_list); + return XFS_FSB_TO_AGNO(mp, ra->ri_startblock) - + XFS_FSB_TO_AGNO(mp, rb->ri_startblock); +} + +/* Get an CUI. */ +STATIC void * +xfs_refcount_update_create_intent( + struct xfs_trans *tp, + unsigned int count) +{ + struct xfs_cui_log_item *cuip; + + ASSERT(tp != NULL); + ASSERT(count > 0); + + cuip = xfs_cui_init(tp->t_mountp, count); + ASSERT(cuip != NULL); + + /* + * Get a log_item_desc to point at the new item. + */ + xfs_trans_add_item(tp, &cuip->cui_item); + return cuip; +} + +/* Set the phys extent flags for this reverse mapping. */ +static void +xfs_trans_set_refcount_flags( + struct xfs_phys_extent *refc, + enum xfs_refcount_intent_type type) +{ + refc->pe_flags = 0; + switch (type) { + case XFS_REFCOUNT_INCREASE: + case XFS_REFCOUNT_DECREASE: + case XFS_REFCOUNT_ALLOC_COW: + case XFS_REFCOUNT_FREE_COW: + refc->pe_flags |= type; + break; + default: + ASSERT(0); + } +} + +/* Log refcount updates in the intent item. */ +STATIC void +xfs_refcount_update_log_item( + struct xfs_trans *tp, + void *intent, + struct list_head *item) +{ + struct xfs_cui_log_item *cuip = intent; + struct xfs_refcount_intent *refc; + uint next_extent; + struct xfs_phys_extent *ext; + + refc = container_of(item, struct xfs_refcount_intent, ri_list); + + tp->t_flags |= XFS_TRANS_DIRTY; + cuip->cui_item.li_desc->lid_flags |= XFS_LID_DIRTY; + + /* + * 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(&cuip->cui_next_extent) - 1; + ASSERT(next_extent < cuip->cui_format.cui_nextents); + ext = &cuip->cui_format.cui_extents[next_extent]; + ext->pe_startblock = refc->ri_startblock; + ext->pe_len = refc->ri_blockcount; + xfs_trans_set_refcount_flags(ext, refc->ri_type); +} + +/* Get an CUD so we can process all the deferred refcount updates. */ +STATIC void * +xfs_refcount_update_create_done( + struct xfs_trans *tp, + void *intent, + unsigned int count) +{ + return xfs_trans_get_cud(tp, intent); +} + +/* Process a deferred refcount update. */ +STATIC int +xfs_refcount_update_finish_item( + struct xfs_trans *tp, + struct xfs_defer_ops *dop, + struct list_head *item, + void *done_item, + void **state) +{ + struct xfs_refcount_intent *refc; + xfs_fsblock_t new_fsb; + xfs_extlen_t new_aglen; + int error; + + refc = container_of(item, struct xfs_refcount_intent, ri_list); + error = xfs_trans_log_finish_refcount_update(tp, done_item, dop, + refc->ri_type, + refc->ri_startblock, + refc->ri_blockcount, + &new_fsb, &new_aglen, + (struct xfs_btree_cur **)state); + /* Did we run out of reservation? Requeue what we didn't finish. */ + if (!error && new_aglen > 0) { + ASSERT(refc->ri_type == XFS_REFCOUNT_INCREASE || + refc->ri_type == XFS_REFCOUNT_DECREASE); + refc->ri_startblock = new_fsb; + refc->ri_blockcount = new_aglen; + return -EAGAIN; + } + kmem_free(refc); + return error; +} + +/* Clean up after processing deferred refcounts. */ +STATIC void +xfs_refcount_update_finish_cleanup( + struct xfs_trans *tp, + void *state, + int error) +{ + struct xfs_btree_cur *rcur = state; + + xfs_refcount_finish_one_cleanup(tp, rcur, error); +} + +/* Abort all pending CUIs. */ +STATIC void +xfs_refcount_update_abort_intent( + void *intent) +{ + xfs_cui_release(intent); +} + +/* Cancel a deferred refcount update. */ +STATIC void +xfs_refcount_update_cancel_item( + struct list_head *item) +{ + struct xfs_refcount_intent *refc; + + refc = container_of(item, struct xfs_refcount_intent, ri_list); + kmem_free(refc); +} + +static const struct xfs_defer_op_type xfs_refcount_update_defer_type = { + .type = XFS_DEFER_OPS_TYPE_REFCOUNT, + .max_items = XFS_CUI_MAX_FAST_EXTENTS, + .diff_items = xfs_refcount_update_diff_items, + .create_intent = xfs_refcount_update_create_intent, + .abort_intent = xfs_refcount_update_abort_intent, + .log_item = xfs_refcount_update_log_item, + .create_done = xfs_refcount_update_create_done, + .finish_item = xfs_refcount_update_finish_item, + .finish_cleanup = xfs_refcount_update_finish_cleanup, + .cancel_item = xfs_refcount_update_cancel_item, +}; + +/* Register the deferred op type. */ +void +xfs_refcount_update_init_defer_op(void) +{ + xfs_defer_init_op_type(&xfs_refcount_update_defer_type); +} |