Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier...
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / xfs / xfs_trans_extfree.c
blob27cce2a9c7e9108debaab50b96a92a2c0109cb39
1 /*
2 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
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
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_dmapi.h"
27 #include "xfs_mount.h"
28 #include "xfs_trans_priv.h"
29 #include "xfs_extfree_item.h"
32 * This routine is called to allocate an "extent free intention"
33 * log item that will hold nextents worth of extents. The
34 * caller must use all nextents extents, because we are not
35 * flexible about this at all.
37 xfs_efi_log_item_t *
38 xfs_trans_get_efi(xfs_trans_t *tp,
39 uint nextents)
41 xfs_efi_log_item_t *efip;
43 ASSERT(tp != NULL);
44 ASSERT(nextents > 0);
46 efip = xfs_efi_init(tp->t_mountp, nextents);
47 ASSERT(efip != NULL);
50 * Get a log_item_desc to point at the new item.
52 (void) xfs_trans_add_item(tp, (xfs_log_item_t*)efip);
54 return (efip);
58 * This routine is called to indicate that the described
59 * extent is to be logged as needing to be freed. It should
60 * be called once for each extent to be freed.
62 void
63 xfs_trans_log_efi_extent(xfs_trans_t *tp,
64 xfs_efi_log_item_t *efip,
65 xfs_fsblock_t start_block,
66 xfs_extlen_t ext_len)
68 xfs_log_item_desc_t *lidp;
69 uint next_extent;
70 xfs_extent_t *extp;
72 lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)efip);
73 ASSERT(lidp != NULL);
75 tp->t_flags |= XFS_TRANS_DIRTY;
76 lidp->lid_flags |= XFS_LID_DIRTY;
78 next_extent = efip->efi_next_extent;
79 ASSERT(next_extent < efip->efi_format.efi_nextents);
80 extp = &(efip->efi_format.efi_extents[next_extent]);
81 extp->ext_start = start_block;
82 extp->ext_len = ext_len;
83 efip->efi_next_extent++;
88 * This routine is called to allocate an "extent free done"
89 * log item that will hold nextents worth of extents. The
90 * caller must use all nextents extents, because we are not
91 * flexible about this at all.
93 xfs_efd_log_item_t *
94 xfs_trans_get_efd(xfs_trans_t *tp,
95 xfs_efi_log_item_t *efip,
96 uint nextents)
98 xfs_efd_log_item_t *efdp;
100 ASSERT(tp != NULL);
101 ASSERT(nextents > 0);
103 efdp = xfs_efd_init(tp->t_mountp, efip, nextents);
104 ASSERT(efdp != NULL);
107 * Get a log_item_desc to point at the new item.
109 (void) xfs_trans_add_item(tp, (xfs_log_item_t*)efdp);
111 return (efdp);
115 * This routine is called to indicate that the described
116 * extent is to be logged as having been freed. It should
117 * be called once for each extent freed.
119 void
120 xfs_trans_log_efd_extent(xfs_trans_t *tp,
121 xfs_efd_log_item_t *efdp,
122 xfs_fsblock_t start_block,
123 xfs_extlen_t ext_len)
125 xfs_log_item_desc_t *lidp;
126 uint next_extent;
127 xfs_extent_t *extp;
129 lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)efdp);
130 ASSERT(lidp != NULL);
132 tp->t_flags |= XFS_TRANS_DIRTY;
133 lidp->lid_flags |= XFS_LID_DIRTY;
135 next_extent = efdp->efd_next_extent;
136 ASSERT(next_extent < efdp->efd_format.efd_nextents);
137 extp = &(efdp->efd_format.efd_extents[next_extent]);
138 extp->ext_start = start_block;
139 extp->ext_len = ext_len;
140 efdp->efd_next_extent++;