2 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #include "xfs_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
25 #include "xfs_mount.h"
26 #include "xfs_defer.h"
27 #include "xfs_trans.h"
28 #include "xfs_trans_priv.h"
29 #include "xfs_extfree_item.h"
30 #include "xfs_alloc.h"
32 #include "xfs_trace.h"
35 * This routine is called to allocate an "extent free done"
36 * log item that will hold nextents worth of extents. The
37 * caller must use all nextents extents, because we are not
38 * flexible about this at all.
40 struct xfs_efd_log_item *
41 xfs_trans_get_efd(struct xfs_trans *tp,
42 struct xfs_efi_log_item *efip,
45 struct xfs_efd_log_item *efdp;
50 efdp = xfs_efd_init(tp->t_mountp, efip, nextents);
54 * Get a log_item_desc to point at the new item.
56 xfs_trans_add_item(tp, &efdp->efd_item);
61 * Free an extent and log it to the EFD. Note that the transaction is marked
62 * dirty regardless of whether the extent free succeeds or fails to support the
63 * EFI/EFD lifecycle rules.
66 xfs_trans_free_extent(
68 struct xfs_efd_log_item *efdp,
69 xfs_fsblock_t start_block,
71 struct xfs_owner_info *oinfo)
73 struct xfs_mount *mp = tp->t_mountp;
75 xfs_agnumber_t agno = XFS_FSB_TO_AGNO(mp, start_block);
76 xfs_agblock_t agbno = XFS_FSB_TO_AGBNO(mp, start_block);
77 struct xfs_extent *extp;
80 trace_xfs_bmap_free_deferred(tp->t_mountp, agno, 0, agbno, ext_len);
82 error = xfs_free_extent(tp, start_block, ext_len, oinfo,
86 * Mark the transaction dirty, even on error. This ensures the
87 * transaction is aborted, which:
89 * 1.) releases the EFI and frees the EFD
90 * 2.) shuts down the filesystem
92 tp->t_flags |= XFS_TRANS_DIRTY;
93 efdp->efd_item.li_desc->lid_flags |= XFS_LID_DIRTY;
95 next_extent = efdp->efd_next_extent;
96 ASSERT(next_extent < efdp->efd_format.efd_nextents);
97 extp = &(efdp->efd_format.efd_extents[next_extent]);
98 extp->ext_start = start_block;
99 extp->ext_len = ext_len;
100 efdp->efd_next_extent++;
105 /* Sort bmap items by AG. */
107 xfs_extent_free_diff_items(
112 struct xfs_mount *mp = priv;
113 struct xfs_extent_free_item *ra;
114 struct xfs_extent_free_item *rb;
116 ra = container_of(a, struct xfs_extent_free_item, xefi_list);
117 rb = container_of(b, struct xfs_extent_free_item, xefi_list);
118 return XFS_FSB_TO_AGNO(mp, ra->xefi_startblock) -
119 XFS_FSB_TO_AGNO(mp, rb->xefi_startblock);
124 xfs_extent_free_create_intent(
125 struct xfs_trans *tp,
128 struct xfs_efi_log_item *efip;
133 efip = xfs_efi_init(tp->t_mountp, count);
134 ASSERT(efip != NULL);
137 * Get a log_item_desc to point at the new item.
139 xfs_trans_add_item(tp, &efip->efi_item);
143 /* Log a free extent to the intent item. */
145 xfs_extent_free_log_item(
146 struct xfs_trans *tp,
148 struct list_head *item)
150 struct xfs_efi_log_item *efip = intent;
151 struct xfs_extent_free_item *free;
153 struct xfs_extent *extp;
155 free = container_of(item, struct xfs_extent_free_item, xefi_list);
157 tp->t_flags |= XFS_TRANS_DIRTY;
158 efip->efi_item.li_desc->lid_flags |= XFS_LID_DIRTY;
161 * atomic_inc_return gives us the value after the increment;
162 * we want to use it as an array index so we need to subtract 1 from
165 next_extent = atomic_inc_return(&efip->efi_next_extent) - 1;
166 ASSERT(next_extent < efip->efi_format.efi_nextents);
167 extp = &efip->efi_format.efi_extents[next_extent];
168 extp->ext_start = free->xefi_startblock;
169 extp->ext_len = free->xefi_blockcount;
172 /* Get an EFD so we can process all the free extents. */
174 xfs_extent_free_create_done(
175 struct xfs_trans *tp,
179 return xfs_trans_get_efd(tp, intent, count);
182 /* Process a free extent. */
184 xfs_extent_free_finish_item(
185 struct xfs_trans *tp,
186 struct xfs_defer_ops *dop,
187 struct list_head *item,
191 struct xfs_extent_free_item *free;
194 free = container_of(item, struct xfs_extent_free_item, xefi_list);
195 error = xfs_trans_free_extent(tp, done_item,
196 free->xefi_startblock,
197 free->xefi_blockcount,
203 /* Abort all pending EFIs. */
205 xfs_extent_free_abort_intent(
208 xfs_efi_release(intent);
211 /* Cancel a free extent. */
213 xfs_extent_free_cancel_item(
214 struct list_head *item)
216 struct xfs_extent_free_item *free;
218 free = container_of(item, struct xfs_extent_free_item, xefi_list);
222 static const struct xfs_defer_op_type xfs_extent_free_defer_type = {
223 .type = XFS_DEFER_OPS_TYPE_FREE,
224 .max_items = XFS_EFI_MAX_FAST_EXTENTS,
225 .diff_items = xfs_extent_free_diff_items,
226 .create_intent = xfs_extent_free_create_intent,
227 .abort_intent = xfs_extent_free_abort_intent,
228 .log_item = xfs_extent_free_log_item,
229 .create_done = xfs_extent_free_create_done,
230 .finish_item = xfs_extent_free_finish_item,
231 .cancel_item = xfs_extent_free_cancel_item,
234 /* Register the deferred op type. */
236 xfs_extent_free_init_defer_op(void)
238 xfs_defer_init_op_type(&xfs_extent_free_defer_type);