Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
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 | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
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. | |
1da177e4 | 13 | * |
7b718769 NS |
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 | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
70a9883c | 20 | #include "xfs_shared.h" |
4fb6e8ad | 21 | #include "xfs_format.h" |
239880ef DC |
22 | #include "xfs_log_format.h" |
23 | #include "xfs_trans_resv.h" | |
1da177e4 | 24 | #include "xfs_mount.h" |
239880ef | 25 | #include "xfs_trans.h" |
1da177e4 LT |
26 | #include "xfs_trans_priv.h" |
27 | #include "xfs_extfree_item.h" | |
6bc43af3 | 28 | #include "xfs_alloc.h" |
1da177e4 LT |
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 * | |
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 | */ | |
e98c414f CH |
51 | xfs_trans_add_item(tp, &efip->efi_item); |
52 | return efip; | |
1da177e4 LT |
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 | |
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 | { | |
1da177e4 LT |
66 | uint next_extent; |
67 | xfs_extent_t *extp; | |
68 | ||
1da177e4 | 69 | tp->t_flags |= XFS_TRANS_DIRTY; |
e98c414f | 70 | efip->efi_item.li_desc->lid_flags |= XFS_LID_DIRTY; |
1da177e4 | 71 | |
b199c8a4 DC |
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; | |
1da177e4 LT |
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; | |
1da177e4 LT |
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 * | |
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 | */ | |
e98c414f CH |
107 | xfs_trans_add_item(tp, &efdp->efd_item); |
108 | return efdp; | |
1da177e4 LT |
109 | } |
110 | ||
111 | /* | |
6bc43af3 BF |
112 | * Free an extent and log it to the EFD. Note that the transaction is marked |
113 | * dirty regardless of whether the extent free succeeds or fails to support the | |
114 | * EFI/EFD lifecycle rules. | |
1da177e4 | 115 | */ |
6bc43af3 BF |
116 | int |
117 | xfs_trans_free_extent( | |
118 | struct xfs_trans *tp, | |
119 | struct xfs_efd_log_item *efdp, | |
120 | xfs_fsblock_t start_block, | |
121 | xfs_extlen_t ext_len) | |
1da177e4 | 122 | { |
1da177e4 | 123 | uint next_extent; |
6bc43af3 BF |
124 | struct xfs_extent *extp; |
125 | int error; | |
1da177e4 | 126 | |
6bc43af3 BF |
127 | error = xfs_free_extent(tp, start_block, ext_len); |
128 | ||
129 | /* | |
130 | * Mark the transaction dirty, even on error. This ensures the | |
131 | * transaction is aborted, which: | |
132 | * | |
133 | * 1.) releases the EFI and frees the EFD | |
134 | * 2.) shuts down the filesystem | |
135 | */ | |
1da177e4 | 136 | tp->t_flags |= XFS_TRANS_DIRTY; |
e98c414f | 137 | efdp->efd_item.li_desc->lid_flags |= XFS_LID_DIRTY; |
1da177e4 LT |
138 | |
139 | next_extent = efdp->efd_next_extent; | |
140 | ASSERT(next_extent < efdp->efd_format.efd_nextents); | |
141 | extp = &(efdp->efd_format.efd_extents[next_extent]); | |
142 | extp->ext_start = start_block; | |
143 | extp->ext_len = ext_len; | |
144 | efdp->efd_next_extent++; | |
6bc43af3 BF |
145 | |
146 | return error; | |
1da177e4 | 147 | } |