Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2003,2005 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" |
739bfb2a CH |
19 | #include "xfs_vnodeops.h" |
20 | #include "xfs_bmap_btree.h" | |
21 | #include "xfs_inode.h" | |
1da177e4 | 22 | |
b677c210 CH |
23 | /* |
24 | * And this gunk is needed for xfs_mount.h" | |
25 | */ | |
26 | #include "xfs_log.h" | |
27 | #include "xfs_trans.h" | |
28 | #include "xfs_sb.h" | |
29 | #include "xfs_dmapi.h" | |
30 | #include "xfs_inum.h" | |
31 | #include "xfs_ag.h" | |
32 | #include "xfs_mount.h" | |
33 | ||
1da177e4 LT |
34 | |
35 | /* | |
36 | * Dedicated vnode inactive/reclaim sync semaphores. | |
37 | * Prime number of hash buckets since address is used as the key. | |
38 | */ | |
39 | #define NVSYNC 37 | |
40 | #define vptosync(v) (&vsync[((unsigned long)v) % NVSYNC]) | |
7989cb8e | 41 | static wait_queue_head_t vsync[NVSYNC]; |
1da177e4 | 42 | |
de2eeea6 | 43 | void __init |
1da177e4 LT |
44 | vn_init(void) |
45 | { | |
51c91ed5 | 46 | int i; |
1da177e4 | 47 | |
51c91ed5 CH |
48 | for (i = 0; i < NVSYNC; i++) |
49 | init_waitqueue_head(&vsync[i]); | |
50 | } | |
51 | ||
52 | void | |
53 | vn_iowait( | |
b677c210 | 54 | xfs_inode_t *ip) |
51c91ed5 | 55 | { |
b677c210 | 56 | wait_queue_head_t *wq = vptosync(ip); |
51c91ed5 | 57 | |
b677c210 | 58 | wait_event(*wq, (atomic_read(&ip->i_iocount) == 0)); |
51c91ed5 CH |
59 | } |
60 | ||
61 | void | |
62 | vn_iowake( | |
b677c210 | 63 | xfs_inode_t *ip) |
51c91ed5 | 64 | { |
b677c210 CH |
65 | if (atomic_dec_and_test(&ip->i_iocount)) |
66 | wake_up(vptosync(ip)); | |
1da177e4 LT |
67 | } |
68 | ||
7d04a335 NS |
69 | /* |
70 | * Volume managers supporting multiple paths can send back ENODEV when the | |
71 | * final path disappears. In this case continuing to fill the page cache | |
72 | * with dirty data which cannot be written out is evil, so prevent that. | |
73 | */ | |
74 | void | |
75 | vn_ioerror( | |
b677c210 | 76 | xfs_inode_t *ip, |
7d04a335 NS |
77 | int error, |
78 | char *f, | |
79 | int l) | |
80 | { | |
81 | if (unlikely(error == -ENODEV)) | |
745f6919 | 82 | xfs_do_force_shutdown(ip->i_mount, SHUTDOWN_DEVICE_REQ, f, l); |
7d04a335 NS |
83 | } |
84 | ||
220b5284 | 85 | |
1da177e4 LT |
86 | /* |
87 | * Add a reference to a referenced vnode. | |
88 | */ | |
67fcaa73 | 89 | bhv_vnode_t * |
1da177e4 | 90 | vn_hold( |
67fcaa73 | 91 | bhv_vnode_t *vp) |
1da177e4 LT |
92 | { |
93 | struct inode *inode; | |
94 | ||
95 | XFS_STATS_INC(vn_hold); | |
96 | ||
ec86dc02 | 97 | inode = igrab(vn_to_inode(vp)); |
1da177e4 | 98 | ASSERT(inode); |
1da177e4 LT |
99 | |
100 | return vp; | |
101 | } | |
102 | ||
cf441eeb | 103 | #ifdef XFS_INODE_TRACE |
1da177e4 | 104 | |
1543d79c CH |
105 | /* |
106 | * Reference count of Linux inode if present, -1 if the xfs_inode | |
107 | * has no associated Linux inode. | |
108 | */ | |
109 | static inline int xfs_icount(struct xfs_inode *ip) | |
110 | { | |
111 | bhv_vnode_t *vp = XFS_ITOV_NULL(ip); | |
112 | ||
113 | if (vp) | |
114 | return vn_count(vp); | |
115 | return -1; | |
116 | } | |
117 | ||
118 | #define KTRACE_ENTER(ip, vk, s, line, ra) \ | |
119 | ktrace_enter( (ip)->i_trace, \ | |
1da177e4 LT |
120 | /* 0 */ (void *)(__psint_t)(vk), \ |
121 | /* 1 */ (void *)(s), \ | |
122 | /* 2 */ (void *)(__psint_t) line, \ | |
1543d79c | 123 | /* 3 */ (void *)(__psint_t)xfs_icount(ip), \ |
1da177e4 | 124 | /* 4 */ (void *)(ra), \ |
b3aea4ed | 125 | /* 5 */ NULL, \ |
1da177e4 LT |
126 | /* 6 */ (void *)(__psint_t)current_cpu(), \ |
127 | /* 7 */ (void *)(__psint_t)current_pid(), \ | |
128 | /* 8 */ (void *)__return_address, \ | |
02de1f0a | 129 | /* 9 */ NULL, NULL, NULL, NULL, NULL, NULL, NULL) |
1da177e4 LT |
130 | |
131 | /* | |
132 | * Vnode tracing code. | |
133 | */ | |
134 | void | |
cf441eeb | 135 | _xfs_itrace_entry(xfs_inode_t *ip, const char *func, inst_t *ra) |
1da177e4 | 136 | { |
cf441eeb | 137 | KTRACE_ENTER(ip, INODE_KTRACE_ENTRY, func, 0, ra); |
1da177e4 LT |
138 | } |
139 | ||
140 | void | |
cf441eeb | 141 | _xfs_itrace_exit(xfs_inode_t *ip, const char *func, inst_t *ra) |
1da177e4 | 142 | { |
cf441eeb | 143 | KTRACE_ENTER(ip, INODE_KTRACE_EXIT, func, 0, ra); |
1da177e4 LT |
144 | } |
145 | ||
146 | void | |
cf441eeb | 147 | xfs_itrace_hold(xfs_inode_t *ip, char *file, int line, inst_t *ra) |
1da177e4 | 148 | { |
cf441eeb | 149 | KTRACE_ENTER(ip, INODE_KTRACE_HOLD, file, line, ra); |
1da177e4 LT |
150 | } |
151 | ||
152 | void | |
cf441eeb | 153 | _xfs_itrace_ref(xfs_inode_t *ip, char *file, int line, inst_t *ra) |
1da177e4 | 154 | { |
cf441eeb | 155 | KTRACE_ENTER(ip, INODE_KTRACE_REF, file, line, ra); |
1da177e4 LT |
156 | } |
157 | ||
158 | void | |
cf441eeb | 159 | xfs_itrace_rele(xfs_inode_t *ip, char *file, int line, inst_t *ra) |
1da177e4 | 160 | { |
cf441eeb | 161 | KTRACE_ENTER(ip, INODE_KTRACE_RELE, file, line, ra); |
1da177e4 | 162 | } |
cf441eeb | 163 | #endif /* XFS_INODE_TRACE */ |