1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2016 Oracle. All Rights Reserved.
8 #include "xfs_shared.h"
9 #include "xfs_format.h"
10 #include "xfs_log_format.h"
11 #include "xfs_trans_resv.h"
12 #include "xfs_mount.h"
13 #include "xfs_defer.h"
14 #include "xfs_trans.h"
15 #include "xfs_trans_priv.h"
16 #include "xfs_refcount_item.h"
17 #include "xfs_alloc.h"
18 #include "xfs_refcount.h"
21 * This routine is called to allocate a "refcount update done"
24 struct xfs_cud_log_item *
27 struct xfs_cui_log_item *cuip)
29 struct xfs_cud_log_item *cudp;
31 cudp = xfs_cud_init(tp->t_mountp, cuip);
32 xfs_trans_add_item(tp, &cudp->cud_item);
37 * Finish an refcount update and log it to the CUD. Note that the
38 * transaction is marked dirty regardless of whether the refcount
39 * update succeeds or fails to support the CUI/CUD lifecycle rules.
42 xfs_trans_log_finish_refcount_update(
44 struct xfs_cud_log_item *cudp,
45 enum xfs_refcount_intent_type type,
46 xfs_fsblock_t startblock,
47 xfs_extlen_t blockcount,
48 xfs_fsblock_t *new_fsb,
49 xfs_extlen_t *new_len,
50 struct xfs_btree_cur **pcur)
54 error = xfs_refcount_finish_one(tp, type, startblock,
55 blockcount, new_fsb, new_len, pcur);
58 * Mark the transaction dirty, even on error. This ensures the
59 * transaction is aborted, which:
61 * 1.) releases the CUI and frees the CUD
62 * 2.) shuts down the filesystem
64 tp->t_flags |= XFS_TRANS_DIRTY;
65 set_bit(XFS_LI_DIRTY, &cudp->cud_item.li_flags);
70 /* Sort refcount intents by AG. */
72 xfs_refcount_update_diff_items(
77 struct xfs_mount *mp = priv;
78 struct xfs_refcount_intent *ra;
79 struct xfs_refcount_intent *rb;
81 ra = container_of(a, struct xfs_refcount_intent, ri_list);
82 rb = container_of(b, struct xfs_refcount_intent, ri_list);
83 return XFS_FSB_TO_AGNO(mp, ra->ri_startblock) -
84 XFS_FSB_TO_AGNO(mp, rb->ri_startblock);
89 xfs_refcount_update_create_intent(
93 struct xfs_cui_log_item *cuip;
98 cuip = xfs_cui_init(tp->t_mountp, count);
102 * Get a log_item_desc to point at the new item.
104 xfs_trans_add_item(tp, &cuip->cui_item);
108 /* Set the phys extent flags for this reverse mapping. */
110 xfs_trans_set_refcount_flags(
111 struct xfs_phys_extent *refc,
112 enum xfs_refcount_intent_type type)
116 case XFS_REFCOUNT_INCREASE:
117 case XFS_REFCOUNT_DECREASE:
118 case XFS_REFCOUNT_ALLOC_COW:
119 case XFS_REFCOUNT_FREE_COW:
120 refc->pe_flags |= type;
127 /* Log refcount updates in the intent item. */
129 xfs_refcount_update_log_item(
130 struct xfs_trans *tp,
132 struct list_head *item)
134 struct xfs_cui_log_item *cuip = intent;
135 struct xfs_refcount_intent *refc;
137 struct xfs_phys_extent *ext;
139 refc = container_of(item, struct xfs_refcount_intent, ri_list);
141 tp->t_flags |= XFS_TRANS_DIRTY;
142 set_bit(XFS_LI_DIRTY, &cuip->cui_item.li_flags);
145 * atomic_inc_return gives us the value after the increment;
146 * we want to use it as an array index so we need to subtract 1 from
149 next_extent = atomic_inc_return(&cuip->cui_next_extent) - 1;
150 ASSERT(next_extent < cuip->cui_format.cui_nextents);
151 ext = &cuip->cui_format.cui_extents[next_extent];
152 ext->pe_startblock = refc->ri_startblock;
153 ext->pe_len = refc->ri_blockcount;
154 xfs_trans_set_refcount_flags(ext, refc->ri_type);
157 /* Get an CUD so we can process all the deferred refcount updates. */
159 xfs_refcount_update_create_done(
160 struct xfs_trans *tp,
164 return xfs_trans_get_cud(tp, intent);
167 /* Process a deferred refcount update. */
169 xfs_refcount_update_finish_item(
170 struct xfs_trans *tp,
171 struct list_head *item,
175 struct xfs_refcount_intent *refc;
176 xfs_fsblock_t new_fsb;
177 xfs_extlen_t new_aglen;
180 refc = container_of(item, struct xfs_refcount_intent, ri_list);
181 error = xfs_trans_log_finish_refcount_update(tp, done_item,
185 &new_fsb, &new_aglen,
186 (struct xfs_btree_cur **)state);
187 /* Did we run out of reservation? Requeue what we didn't finish. */
188 if (!error && new_aglen > 0) {
189 ASSERT(refc->ri_type == XFS_REFCOUNT_INCREASE ||
190 refc->ri_type == XFS_REFCOUNT_DECREASE);
191 refc->ri_startblock = new_fsb;
192 refc->ri_blockcount = new_aglen;
199 /* Clean up after processing deferred refcounts. */
201 xfs_refcount_update_finish_cleanup(
202 struct xfs_trans *tp,
206 struct xfs_btree_cur *rcur = state;
208 xfs_refcount_finish_one_cleanup(tp, rcur, error);
211 /* Abort all pending CUIs. */
213 xfs_refcount_update_abort_intent(
216 xfs_cui_release(intent);
219 /* Cancel a deferred refcount update. */
221 xfs_refcount_update_cancel_item(
222 struct list_head *item)
224 struct xfs_refcount_intent *refc;
226 refc = container_of(item, struct xfs_refcount_intent, ri_list);
230 const struct xfs_defer_op_type xfs_refcount_update_defer_type = {
231 .max_items = XFS_CUI_MAX_FAST_EXTENTS,
232 .diff_items = xfs_refcount_update_diff_items,
233 .create_intent = xfs_refcount_update_create_intent,
234 .abort_intent = xfs_refcount_update_abort_intent,
235 .log_item = xfs_refcount_update_log_item,
236 .create_done = xfs_refcount_update_create_done,
237 .finish_item = xfs_refcount_update_finish_item,
238 .finish_cleanup = xfs_refcount_update_finish_cleanup,
239 .cancel_item = xfs_refcount_update_cancel_item,