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_inum.h"
23 #include "xfs_trans.h"
24 #include "xfs_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_mount.h"
27 #include "xfs_trans_priv.h"
28 #include "xfs_extfree_item.h"
29
30 /*
31 * This routine is called to allocate an "extent free intention"
32 * log item that will hold nextents worth of extents. The
33 * caller must use all nextents extents, because we are not
34 * flexible about this at all.
35 */
36 xfs_efi_log_item_t *
xfs_trans_get_efi(xfs_trans_t * tp,uint nextents)37 xfs_trans_get_efi(xfs_trans_t *tp,
38 uint nextents)
39 {
40 xfs_efi_log_item_t *efip;
41
42 ASSERT(tp != NULL);
43 ASSERT(nextents > 0);
44
45 efip = xfs_efi_init(tp->t_mountp, nextents);
46 ASSERT(efip != NULL);
47
48 /*
49 * Get a log_item_desc to point at the new item.
50 */
51 xfs_trans_add_item(tp, &efip->efi_item);
52 return efip;
53 }
54
55 /*
56 * This routine is called to indicate that the described
57 * extent is to be logged as needing to be freed. It should
58 * be called once for each extent to be freed.
59 */
60 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)61 xfs_trans_log_efi_extent(xfs_trans_t *tp,
62 xfs_efi_log_item_t *efip,
63 xfs_fsblock_t start_block,
64 xfs_extlen_t ext_len)
65 {
66 uint next_extent;
67 xfs_extent_t *extp;
68
69 tp->t_flags |= XFS_TRANS_DIRTY;
70 efip->efi_item.li_desc->lid_flags |= XFS_LID_DIRTY;
71
72 /*
73 * atomic_inc_return gives us the value after the increment;
74 * we want to use it as an array index so we need to subtract 1 from
75 * it.
76 */
77 next_extent = atomic_inc_return(&efip->efi_next_extent) - 1;
78 ASSERT(next_extent < efip->efi_format.efi_nextents);
79 extp = &(efip->efi_format.efi_extents[next_extent]);
80 extp->ext_start = start_block;
81 extp->ext_len = ext_len;
82 }
83
84
85 /*
86 * This routine is called to allocate an "extent free done"
87 * log item that will hold nextents worth of extents. The
88 * caller must use all nextents extents, because we are not
89 * flexible about this at all.
90 */
91 xfs_efd_log_item_t *
xfs_trans_get_efd(xfs_trans_t * tp,xfs_efi_log_item_t * efip,uint nextents)92 xfs_trans_get_efd(xfs_trans_t *tp,
93 xfs_efi_log_item_t *efip,
94 uint nextents)
95 {
96 xfs_efd_log_item_t *efdp;
97
98 ASSERT(tp != NULL);
99 ASSERT(nextents > 0);
100
101 efdp = xfs_efd_init(tp->t_mountp, efip, nextents);
102 ASSERT(efdp != NULL);
103
104 /*
105 * Get a log_item_desc to point at the new item.
106 */
107 xfs_trans_add_item(tp, &efdp->efd_item);
108 return efdp;
109 }
110
111 /*
112 * This routine is called to indicate that the described
113 * extent is to be logged as having been freed. It should
114 * be called once for each extent freed.
115 */
116 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)117 xfs_trans_log_efd_extent(xfs_trans_t *tp,
118 xfs_efd_log_item_t *efdp,
119 xfs_fsblock_t start_block,
120 xfs_extlen_t ext_len)
121 {
122 uint next_extent;
123 xfs_extent_t *extp;
124
125 tp->t_flags |= XFS_TRANS_DIRTY;
126 efdp->efd_item.li_desc->lid_flags |= XFS_LID_DIRTY;
127
128 next_extent = efdp->efd_next_extent;
129 ASSERT(next_extent < efdp->efd_format.efd_nextents);
130 extp = &(efdp->efd_format.efd_extents[next_extent]);
131 extp->ext_start = start_block;
132 extp->ext_len = ext_len;
133 efdp->efd_next_extent++;
134 }
135