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 | uint64_t vn_generation; /* vnode generation number */ |
35 | DEFINE_SPINLOCK(vnumber_lock); | |
36 | ||
37 | /* | |
38 | * Dedicated vnode inactive/reclaim sync semaphores. | |
39 | * Prime number of hash buckets since address is used as the key. | |
40 | */ | |
41 | #define NVSYNC 37 | |
42 | #define vptosync(v) (&vsync[((unsigned long)v) % NVSYNC]) | |
7989cb8e | 43 | static wait_queue_head_t vsync[NVSYNC]; |
1da177e4 | 44 | |
1da177e4 LT |
45 | void |
46 | vn_init(void) | |
47 | { | |
51c91ed5 | 48 | int i; |
1da177e4 | 49 | |
51c91ed5 CH |
50 | for (i = 0; i < NVSYNC; i++) |
51 | init_waitqueue_head(&vsync[i]); | |
52 | } | |
53 | ||
54 | void | |
55 | vn_iowait( | |
b677c210 | 56 | xfs_inode_t *ip) |
51c91ed5 | 57 | { |
b677c210 | 58 | wait_queue_head_t *wq = vptosync(ip); |
51c91ed5 | 59 | |
b677c210 | 60 | wait_event(*wq, (atomic_read(&ip->i_iocount) == 0)); |
51c91ed5 CH |
61 | } |
62 | ||
63 | void | |
64 | vn_iowake( | |
b677c210 | 65 | xfs_inode_t *ip) |
51c91ed5 | 66 | { |
b677c210 CH |
67 | if (atomic_dec_and_test(&ip->i_iocount)) |
68 | wake_up(vptosync(ip)); | |
1da177e4 LT |
69 | } |
70 | ||
7d04a335 NS |
71 | /* |
72 | * Volume managers supporting multiple paths can send back ENODEV when the | |
73 | * final path disappears. In this case continuing to fill the page cache | |
74 | * with dirty data which cannot be written out is evil, so prevent that. | |
75 | */ | |
76 | void | |
77 | vn_ioerror( | |
b677c210 | 78 | xfs_inode_t *ip, |
7d04a335 NS |
79 | int error, |
80 | char *f, | |
81 | int l) | |
82 | { | |
b677c210 | 83 | bhv_vfs_t *vfsp = XFS_MTOVFS(ip->i_mount); |
2f6f7b3d | 84 | |
7d04a335 | 85 | if (unlikely(error == -ENODEV)) |
2f6f7b3d | 86 | bhv_vfs_force_shutdown(vfsp, SHUTDOWN_DEVICE_REQ, f, l); |
7d04a335 NS |
87 | } |
88 | ||
67fcaa73 | 89 | bhv_vnode_t * |
1da177e4 LT |
90 | vn_initialize( |
91 | struct inode *inode) | |
92 | { | |
67fcaa73 | 93 | bhv_vnode_t *vp = vn_from_inode(inode); |
1da177e4 LT |
94 | |
95 | XFS_STATS_INC(vn_active); | |
96 | XFS_STATS_INC(vn_alloc); | |
97 | ||
1da177e4 LT |
98 | spin_lock(&vnumber_lock); |
99 | if (!++vn_generation) /* v_number shouldn't be zero */ | |
100 | vn_generation++; | |
101 | vp->v_number = vn_generation; | |
102 | spin_unlock(&vnumber_lock); | |
103 | ||
104 | ASSERT(VN_CACHED(vp) == 0); | |
105 | ||
1da177e4 LT |
106 | #ifdef XFS_VNODE_TRACE |
107 | vp->v_trace = ktrace_alloc(VNODE_TRACE_SIZE, KM_SLEEP); | |
1da177e4 LT |
108 | #endif /* XFS_VNODE_TRACE */ |
109 | ||
220b5284 | 110 | vn_trace_exit(vp, __FUNCTION__, (inst_t *)__return_address); |
1da177e4 LT |
111 | return vp; |
112 | } | |
113 | ||
1da177e4 LT |
114 | /* |
115 | * Revalidate the Linux inode from the vattr. | |
116 | * Note: i_size _not_ updated; we must hold the inode | |
117 | * semaphore when doing that - callers responsibility. | |
118 | */ | |
119 | void | |
120 | vn_revalidate_core( | |
67fcaa73 | 121 | bhv_vnode_t *vp, |
8285fb58 | 122 | bhv_vattr_t *vap) |
1da177e4 | 123 | { |
ec86dc02 | 124 | struct inode *inode = vn_to_inode(vp); |
1da177e4 | 125 | |
0432dab2 | 126 | inode->i_mode = vap->va_mode; |
1da177e4 LT |
127 | inode->i_nlink = vap->va_nlink; |
128 | inode->i_uid = vap->va_uid; | |
129 | inode->i_gid = vap->va_gid; | |
130 | inode->i_blocks = vap->va_nblocks; | |
131 | inode->i_mtime = vap->va_mtime; | |
132 | inode->i_ctime = vap->va_ctime; | |
1da177e4 LT |
133 | if (vap->va_xflags & XFS_XFLAG_IMMUTABLE) |
134 | inode->i_flags |= S_IMMUTABLE; | |
135 | else | |
136 | inode->i_flags &= ~S_IMMUTABLE; | |
137 | if (vap->va_xflags & XFS_XFLAG_APPEND) | |
138 | inode->i_flags |= S_APPEND; | |
139 | else | |
140 | inode->i_flags &= ~S_APPEND; | |
141 | if (vap->va_xflags & XFS_XFLAG_SYNC) | |
142 | inode->i_flags |= S_SYNC; | |
143 | else | |
144 | inode->i_flags &= ~S_SYNC; | |
145 | if (vap->va_xflags & XFS_XFLAG_NOATIME) | |
146 | inode->i_flags |= S_NOATIME; | |
147 | else | |
148 | inode->i_flags &= ~S_NOATIME; | |
149 | } | |
150 | ||
151 | /* | |
152 | * Revalidate the Linux inode from the vnode. | |
153 | */ | |
154 | int | |
220b5284 | 155 | __vn_revalidate( |
67fcaa73 | 156 | bhv_vnode_t *vp, |
8285fb58 | 157 | bhv_vattr_t *vattr) |
1da177e4 | 158 | { |
1da177e4 LT |
159 | int error; |
160 | ||
220b5284 NS |
161 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
162 | vattr->va_mask = XFS_AT_STAT | XFS_AT_XFLAGS; | |
739bfb2a | 163 | error = xfs_getattr(xfs_vtoi(vp), vattr, 0); |
220b5284 NS |
164 | if (likely(!error)) { |
165 | vn_revalidate_core(vp, vattr); | |
b3aea4ed | 166 | xfs_iflags_clear(xfs_vtoi(vp), XFS_IMODIFIED); |
1da177e4 LT |
167 | } |
168 | return -error; | |
169 | } | |
170 | ||
220b5284 NS |
171 | int |
172 | vn_revalidate( | |
67fcaa73 | 173 | bhv_vnode_t *vp) |
220b5284 | 174 | { |
8285fb58 | 175 | bhv_vattr_t vattr; |
220b5284 NS |
176 | |
177 | return __vn_revalidate(vp, &vattr); | |
178 | } | |
179 | ||
1da177e4 LT |
180 | /* |
181 | * Add a reference to a referenced vnode. | |
182 | */ | |
67fcaa73 | 183 | bhv_vnode_t * |
1da177e4 | 184 | vn_hold( |
67fcaa73 | 185 | bhv_vnode_t *vp) |
1da177e4 LT |
186 | { |
187 | struct inode *inode; | |
188 | ||
189 | XFS_STATS_INC(vn_hold); | |
190 | ||
ec86dc02 | 191 | inode = igrab(vn_to_inode(vp)); |
1da177e4 | 192 | ASSERT(inode); |
1da177e4 LT |
193 | |
194 | return vp; | |
195 | } | |
196 | ||
1da177e4 LT |
197 | #ifdef XFS_VNODE_TRACE |
198 | ||
199 | #define KTRACE_ENTER(vp, vk, s, line, ra) \ | |
200 | ktrace_enter( (vp)->v_trace, \ | |
201 | /* 0 */ (void *)(__psint_t)(vk), \ | |
202 | /* 1 */ (void *)(s), \ | |
203 | /* 2 */ (void *)(__psint_t) line, \ | |
02de1f0a | 204 | /* 3 */ (void *)(__psint_t)(vn_count(vp)), \ |
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 | |
67fcaa73 | 216 | vn_trace_entry(bhv_vnode_t *vp, const char *func, inst_t *ra) |
1da177e4 LT |
217 | { |
218 | KTRACE_ENTER(vp, VNODE_KTRACE_ENTRY, func, 0, ra); | |
219 | } | |
220 | ||
221 | void | |
67fcaa73 | 222 | vn_trace_exit(bhv_vnode_t *vp, const char *func, inst_t *ra) |
1da177e4 LT |
223 | { |
224 | KTRACE_ENTER(vp, VNODE_KTRACE_EXIT, func, 0, ra); | |
225 | } | |
226 | ||
227 | void | |
67fcaa73 | 228 | vn_trace_hold(bhv_vnode_t *vp, char *file, int line, inst_t *ra) |
1da177e4 LT |
229 | { |
230 | KTRACE_ENTER(vp, VNODE_KTRACE_HOLD, file, line, ra); | |
231 | } | |
232 | ||
233 | void | |
67fcaa73 | 234 | vn_trace_ref(bhv_vnode_t *vp, char *file, int line, inst_t *ra) |
1da177e4 LT |
235 | { |
236 | KTRACE_ENTER(vp, VNODE_KTRACE_REF, file, line, ra); | |
237 | } | |
238 | ||
239 | void | |
67fcaa73 | 240 | vn_trace_rele(bhv_vnode_t *vp, char *file, int line, inst_t *ra) |
1da177e4 LT |
241 | { |
242 | KTRACE_ENTER(vp, VNODE_KTRACE_RELE, file, line, ra); | |
243 | } | |
244 | #endif /* XFS_VNODE_TRACE */ |