Commit | Line | Data |
---|---|---|
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 | |
1da177e4 LT |
43 | void |
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 | { | |
b677c210 | 81 | bhv_vfs_t *vfsp = XFS_MTOVFS(ip->i_mount); |
2f6f7b3d | 82 | |
7d04a335 | 83 | if (unlikely(error == -ENODEV)) |
2f6f7b3d | 84 | bhv_vfs_force_shutdown(vfsp, SHUTDOWN_DEVICE_REQ, f, l); |
7d04a335 NS |
85 | } |
86 | ||
67fcaa73 | 87 | bhv_vnode_t * |
1da177e4 LT |
88 | vn_initialize( |
89 | struct inode *inode) | |
90 | { | |
67fcaa73 | 91 | bhv_vnode_t *vp = vn_from_inode(inode); |
1da177e4 LT |
92 | |
93 | XFS_STATS_INC(vn_active); | |
94 | XFS_STATS_INC(vn_alloc); | |
95 | ||
1da177e4 LT |
96 | ASSERT(VN_CACHED(vp) == 0); |
97 | ||
1da177e4 LT |
98 | return vp; |
99 | } | |
100 | ||
1da177e4 LT |
101 | /* |
102 | * Revalidate the Linux inode from the vattr. | |
103 | * Note: i_size _not_ updated; we must hold the inode | |
104 | * semaphore when doing that - callers responsibility. | |
105 | */ | |
106 | void | |
107 | vn_revalidate_core( | |
67fcaa73 | 108 | bhv_vnode_t *vp, |
8285fb58 | 109 | bhv_vattr_t *vap) |
1da177e4 | 110 | { |
ec86dc02 | 111 | struct inode *inode = vn_to_inode(vp); |
1da177e4 | 112 | |
0432dab2 | 113 | inode->i_mode = vap->va_mode; |
1da177e4 LT |
114 | inode->i_nlink = vap->va_nlink; |
115 | inode->i_uid = vap->va_uid; | |
116 | inode->i_gid = vap->va_gid; | |
117 | inode->i_blocks = vap->va_nblocks; | |
118 | inode->i_mtime = vap->va_mtime; | |
119 | inode->i_ctime = vap->va_ctime; | |
1da177e4 LT |
120 | if (vap->va_xflags & XFS_XFLAG_IMMUTABLE) |
121 | inode->i_flags |= S_IMMUTABLE; | |
122 | else | |
123 | inode->i_flags &= ~S_IMMUTABLE; | |
124 | if (vap->va_xflags & XFS_XFLAG_APPEND) | |
125 | inode->i_flags |= S_APPEND; | |
126 | else | |
127 | inode->i_flags &= ~S_APPEND; | |
128 | if (vap->va_xflags & XFS_XFLAG_SYNC) | |
129 | inode->i_flags |= S_SYNC; | |
130 | else | |
131 | inode->i_flags &= ~S_SYNC; | |
132 | if (vap->va_xflags & XFS_XFLAG_NOATIME) | |
133 | inode->i_flags |= S_NOATIME; | |
134 | else | |
135 | inode->i_flags &= ~S_NOATIME; | |
136 | } | |
137 | ||
138 | /* | |
139 | * Revalidate the Linux inode from the vnode. | |
140 | */ | |
141 | int | |
220b5284 | 142 | __vn_revalidate( |
67fcaa73 | 143 | bhv_vnode_t *vp, |
8285fb58 | 144 | bhv_vattr_t *vattr) |
1da177e4 | 145 | { |
1da177e4 LT |
146 | int error; |
147 | ||
1543d79c | 148 | vn_trace_entry(xfs_vtoi(vp), __FUNCTION__, (inst_t *)__return_address); |
220b5284 | 149 | vattr->va_mask = XFS_AT_STAT | XFS_AT_XFLAGS; |
739bfb2a | 150 | error = xfs_getattr(xfs_vtoi(vp), vattr, 0); |
220b5284 NS |
151 | if (likely(!error)) { |
152 | vn_revalidate_core(vp, vattr); | |
b3aea4ed | 153 | xfs_iflags_clear(xfs_vtoi(vp), XFS_IMODIFIED); |
1da177e4 LT |
154 | } |
155 | return -error; | |
156 | } | |
157 | ||
220b5284 NS |
158 | int |
159 | vn_revalidate( | |
67fcaa73 | 160 | bhv_vnode_t *vp) |
220b5284 | 161 | { |
8285fb58 | 162 | bhv_vattr_t vattr; |
220b5284 NS |
163 | |
164 | return __vn_revalidate(vp, &vattr); | |
165 | } | |
166 | ||
1da177e4 LT |
167 | /* |
168 | * Add a reference to a referenced vnode. | |
169 | */ | |
67fcaa73 | 170 | bhv_vnode_t * |
1da177e4 | 171 | vn_hold( |
67fcaa73 | 172 | bhv_vnode_t *vp) |
1da177e4 LT |
173 | { |
174 | struct inode *inode; | |
175 | ||
176 | XFS_STATS_INC(vn_hold); | |
177 | ||
ec86dc02 | 178 | inode = igrab(vn_to_inode(vp)); |
1da177e4 | 179 | ASSERT(inode); |
1da177e4 LT |
180 | |
181 | return vp; | |
182 | } | |
183 | ||
1da177e4 LT |
184 | #ifdef XFS_VNODE_TRACE |
185 | ||
1543d79c CH |
186 | /* |
187 | * Reference count of Linux inode if present, -1 if the xfs_inode | |
188 | * has no associated Linux inode. | |
189 | */ | |
190 | static inline int xfs_icount(struct xfs_inode *ip) | |
191 | { | |
192 | bhv_vnode_t *vp = XFS_ITOV_NULL(ip); | |
193 | ||
194 | if (vp) | |
195 | return vn_count(vp); | |
196 | return -1; | |
197 | } | |
198 | ||
199 | #define KTRACE_ENTER(ip, vk, s, line, ra) \ | |
200 | ktrace_enter( (ip)->i_trace, \ | |
1da177e4 LT |
201 | /* 0 */ (void *)(__psint_t)(vk), \ |
202 | /* 1 */ (void *)(s), \ | |
203 | /* 2 */ (void *)(__psint_t) line, \ | |
1543d79c | 204 | /* 3 */ (void *)(__psint_t)xfs_icount(ip), \ |
1da177e4 | 205 | /* 4 */ (void *)(ra), \ |
b3aea4ed | 206 | /* 5 */ NULL, \ |
1da177e4 LT |
207 | /* 6 */ (void *)(__psint_t)current_cpu(), \ |
208 | /* 7 */ (void *)(__psint_t)current_pid(), \ | |
209 | /* 8 */ (void *)__return_address, \ | |
02de1f0a | 210 | /* 9 */ NULL, NULL, NULL, NULL, NULL, NULL, NULL) |
1da177e4 LT |
211 | |
212 | /* | |
213 | * Vnode tracing code. | |
214 | */ | |
215 | void | |
1543d79c | 216 | vn_trace_entry(xfs_inode_t *ip, const char *func, inst_t *ra) |
1da177e4 | 217 | { |
1543d79c | 218 | KTRACE_ENTER(ip, VNODE_KTRACE_ENTRY, func, 0, ra); |
1da177e4 LT |
219 | } |
220 | ||
221 | void | |
1543d79c | 222 | vn_trace_exit(xfs_inode_t *ip, const char *func, inst_t *ra) |
1da177e4 | 223 | { |
1543d79c | 224 | KTRACE_ENTER(ip, VNODE_KTRACE_EXIT, func, 0, ra); |
1da177e4 LT |
225 | } |
226 | ||
227 | void | |
1543d79c | 228 | vn_trace_hold(xfs_inode_t *ip, char *file, int line, inst_t *ra) |
1da177e4 | 229 | { |
1543d79c | 230 | KTRACE_ENTER(ip, VNODE_KTRACE_HOLD, file, line, ra); |
1da177e4 LT |
231 | } |
232 | ||
233 | void | |
1543d79c | 234 | vn_trace_ref(xfs_inode_t *ip, char *file, int line, inst_t *ra) |
1da177e4 | 235 | { |
1543d79c | 236 | KTRACE_ENTER(ip, VNODE_KTRACE_REF, file, line, ra); |
1da177e4 LT |
237 | } |
238 | ||
239 | void | |
1543d79c | 240 | vn_trace_rele(xfs_inode_t *ip, char *file, int line, inst_t *ra) |
1da177e4 | 241 | { |
1543d79c | 242 | KTRACE_ENTER(ip, VNODE_KTRACE_RELE, file, line, ra); |
1da177e4 LT |
243 | } |
244 | #endif /* XFS_VNODE_TRACE */ |