1 /*
2 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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.
8 *
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.
13 *
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
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_types.h"
21 #include "xfs_log.h"
22 #include "xfs_trans.h"
23 #include "xfs_sb.h"
24 #include "xfs_ag.h"
25 #include "xfs_mount.h"
26 #include "xfs_trans_priv.h"
27 #include "xfs_extfree_item.h"
28
29 /*
30 * This routine is called to allocate an "extent free intention"
31 * log item that will hold nextents worth of extents. The
32 * caller must use all nextents extents, because we are not
33 * flexible about this at all.
34 */
35 xfs_efi_log_item_t *
xfs_trans_get_efi(xfs_trans_t * tp,uint nextents)36 xfs_trans_get_efi(xfs_trans_t *tp,
37 uint nextents)
38 {
39 xfs_efi_log_item_t *efip;
40
41 ASSERT(tp != NULL);
42 ASSERT(nextents > 0);
43
44 efip = xfs_efi_init(tp->t_mountp, nextents);
45 ASSERT(efip != NULL);
46
47 /*
48 * Get a log_item_desc to point at the new item.
49 */
50 xfs_trans_add_item(tp, &efip->efi_item);
51 return efip;
52 }
53
54 /*
55 * This routine is called to indicate that the described
56 * extent is to be logged as needing to be freed. It should
57 * be called once for each extent to be freed.
58 */
59 void
xfs_trans_log_efi_extent(xfs_trans_t * tp,xfs_efi_log_item_t * efip,xfs_fsblock_t start_block,xfs_extlen_t ext_len)60 xfs_trans_log_efi_extent(xfs_trans_t *tp,
61 xfs_efi_log_item_t *efip,
62 xfs_fsblock_t start_block,
63 xfs_extlen_t ext_len)
64 {
65 uint next_extent;
66 xfs_extent_t *extp;
67
68 tp->t_flags |= XFS_TRANS_DIRTY;
69 efip->efi_item.li_desc->lid_flags |= XFS_LID_DIRTY;
70
71 /*
72 * atomic_inc_return gives us the value after the increment;
73 * we want to use it as an array index so we need to subtract 1 from
74 * it.
75 */
76 next_extent = atomic_inc_return(&efip->efi_next_extent) - 1;
77 ASSERT(next_extent < efip->efi_format.efi_nextents);
78 extp = &(efip->efi_format.efi_extents[next_extent]);
79 extp->ext_start = start_block;
80 extp->ext_len = ext_len;
81 }
82
83
84 /*
85 * This routine is called to allocate an "extent free done"
86 * log item that will hold nextents worth of extents. The
87 * caller must use all nextents extents, because we are not
88 * flexible about this at all.
89 */
90 xfs_efd_log_item_t *
xfs_trans_get_efd(xfs_trans_t * tp,xfs_efi_log_item_t * efip,uint nextents)91 xfs_trans_get_efd(xfs_trans_t *tp,
92 xfs_efi_log_item_t *efip,
93 uint nextents)
94 {
95 xfs_efd_log_item_t *efdp;
96
97 ASSERT(tp != NULL);
98 ASSERT(nextents > 0);
99
100 efdp = xfs_efd_init(tp->t_mountp, efip, nextents);
101 ASSERT(efdp != NULL);
102
103 /*
104 * Get a log_item_desc to point at the new item.
105 */
106 xfs_trans_add_item(tp, &efdp->efd_item);
107 return efdp;
108 }
109
110 /*
111 * This routine is called to indicate that the described
112 * extent is to be logged as having been freed. It should
113 * be called once for each extent freed.
114 */
115 void
xfs_trans_log_efd_extent(xfs_trans_t * tp,xfs_efd_log_item_t * efdp,xfs_fsblock_t start_block,xfs_extlen_t ext_len)116 xfs_trans_log_efd_extent(xfs_trans_t *tp,
117 xfs_efd_log_item_t *efdp,
118 xfs_fsblock_t start_block,
119 xfs_extlen_t ext_len)
120 {
121 uint next_extent;
122 xfs_extent_t *extp;
123
124 tp->t_flags |= XFS_TRANS_DIRTY;
125 efdp->efd_item.li_desc->lid_flags |= XFS_LID_DIRTY;
126
127 next_extent = efdp->efd_next_extent;
128 ASSERT(next_extent < efdp->efd_format.efd_nextents);
129 extp = &(efdp->efd_format.efd_extents[next_extent]);
130 extp->ext_start = start_block;
131 extp->ext_len = ext_len;
132 efdp->efd_next_extent++;
133 }
134