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 | |
1da177e4 LT |
23 | uint64_t vn_generation; /* vnode generation number */ |
24 | DEFINE_SPINLOCK(vnumber_lock); | |
25 | ||
26 | /* | |
27 | * Dedicated vnode inactive/reclaim sync semaphores. | |
28 | * Prime number of hash buckets since address is used as the key. | |
29 | */ | |
30 | #define NVSYNC 37 | |
31 | #define vptosync(v) (&vsync[((unsigned long)v) % NVSYNC]) | |
7989cb8e | 32 | static wait_queue_head_t vsync[NVSYNC]; |
1da177e4 | 33 | |
1da177e4 LT |
34 | void |
35 | vn_init(void) | |
36 | { | |
51c91ed5 | 37 | int i; |
1da177e4 | 38 | |
51c91ed5 CH |
39 | for (i = 0; i < NVSYNC; i++) |
40 | init_waitqueue_head(&vsync[i]); | |
41 | } | |
42 | ||
43 | void | |
44 | vn_iowait( | |
67fcaa73 | 45 | bhv_vnode_t *vp) |
51c91ed5 CH |
46 | { |
47 | wait_queue_head_t *wq = vptosync(vp); | |
48 | ||
49 | wait_event(*wq, (atomic_read(&vp->v_iocount) == 0)); | |
50 | } | |
51 | ||
52 | void | |
53 | vn_iowake( | |
67fcaa73 | 54 | bhv_vnode_t *vp) |
51c91ed5 CH |
55 | { |
56 | if (atomic_dec_and_test(&vp->v_iocount)) | |
57 | wake_up(vptosync(vp)); | |
1da177e4 LT |
58 | } |
59 | ||
7d04a335 NS |
60 | /* |
61 | * Volume managers supporting multiple paths can send back ENODEV when the | |
62 | * final path disappears. In this case continuing to fill the page cache | |
63 | * with dirty data which cannot be written out is evil, so prevent that. | |
64 | */ | |
65 | void | |
66 | vn_ioerror( | |
67fcaa73 | 67 | bhv_vnode_t *vp, |
7d04a335 NS |
68 | int error, |
69 | char *f, | |
70 | int l) | |
71 | { | |
2f6f7b3d CH |
72 | bhv_vfs_t *vfsp = vfs_from_sb(vp->v_inode.i_sb); |
73 | ||
7d04a335 | 74 | if (unlikely(error == -ENODEV)) |
2f6f7b3d | 75 | bhv_vfs_force_shutdown(vfsp, SHUTDOWN_DEVICE_REQ, f, l); |
7d04a335 NS |
76 | } |
77 | ||
67fcaa73 | 78 | bhv_vnode_t * |
1da177e4 LT |
79 | vn_initialize( |
80 | struct inode *inode) | |
81 | { | |
67fcaa73 | 82 | bhv_vnode_t *vp = vn_from_inode(inode); |
1da177e4 LT |
83 | |
84 | XFS_STATS_INC(vn_active); | |
85 | XFS_STATS_INC(vn_alloc); | |
86 | ||
87 | vp->v_flag = VMODIFIED; | |
88 | spinlock_init(&vp->v_lock, "v_lock"); | |
89 | ||
90 | spin_lock(&vnumber_lock); | |
91 | if (!++vn_generation) /* v_number shouldn't be zero */ | |
92 | vn_generation++; | |
93 | vp->v_number = vn_generation; | |
94 | spin_unlock(&vnumber_lock); | |
95 | ||
96 | ASSERT(VN_CACHED(vp) == 0); | |
97 | ||
51c91ed5 CH |
98 | atomic_set(&vp->v_iocount, 0); |
99 | ||
1da177e4 LT |
100 | #ifdef XFS_VNODE_TRACE |
101 | vp->v_trace = ktrace_alloc(VNODE_TRACE_SIZE, KM_SLEEP); | |
1da177e4 LT |
102 | #endif /* XFS_VNODE_TRACE */ |
103 | ||
220b5284 | 104 | vn_trace_exit(vp, __FUNCTION__, (inst_t *)__return_address); |
1da177e4 LT |
105 | return vp; |
106 | } | |
107 | ||
1da177e4 LT |
108 | /* |
109 | * Revalidate the Linux inode from the vattr. | |
110 | * Note: i_size _not_ updated; we must hold the inode | |
111 | * semaphore when doing that - callers responsibility. | |
112 | */ | |
113 | void | |
114 | vn_revalidate_core( | |
67fcaa73 | 115 | bhv_vnode_t *vp, |
8285fb58 | 116 | bhv_vattr_t *vap) |
1da177e4 | 117 | { |
ec86dc02 | 118 | struct inode *inode = vn_to_inode(vp); |
1da177e4 | 119 | |
0432dab2 | 120 | inode->i_mode = vap->va_mode; |
1da177e4 LT |
121 | inode->i_nlink = vap->va_nlink; |
122 | inode->i_uid = vap->va_uid; | |
123 | inode->i_gid = vap->va_gid; | |
124 | inode->i_blocks = vap->va_nblocks; | |
125 | inode->i_mtime = vap->va_mtime; | |
126 | inode->i_ctime = vap->va_ctime; | |
1da177e4 LT |
127 | if (vap->va_xflags & XFS_XFLAG_IMMUTABLE) |
128 | inode->i_flags |= S_IMMUTABLE; | |
129 | else | |
130 | inode->i_flags &= ~S_IMMUTABLE; | |
131 | if (vap->va_xflags & XFS_XFLAG_APPEND) | |
132 | inode->i_flags |= S_APPEND; | |
133 | else | |
134 | inode->i_flags &= ~S_APPEND; | |
135 | if (vap->va_xflags & XFS_XFLAG_SYNC) | |
136 | inode->i_flags |= S_SYNC; | |
137 | else | |
138 | inode->i_flags &= ~S_SYNC; | |
139 | if (vap->va_xflags & XFS_XFLAG_NOATIME) | |
140 | inode->i_flags |= S_NOATIME; | |
141 | else | |
142 | inode->i_flags &= ~S_NOATIME; | |
143 | } | |
144 | ||
145 | /* | |
146 | * Revalidate the Linux inode from the vnode. | |
147 | */ | |
148 | int | |
220b5284 | 149 | __vn_revalidate( |
67fcaa73 | 150 | bhv_vnode_t *vp, |
8285fb58 | 151 | bhv_vattr_t *vattr) |
1da177e4 | 152 | { |
1da177e4 LT |
153 | int error; |
154 | ||
220b5284 NS |
155 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
156 | vattr->va_mask = XFS_AT_STAT | XFS_AT_XFLAGS; | |
739bfb2a | 157 | error = xfs_getattr(xfs_vtoi(vp), vattr, 0); |
220b5284 NS |
158 | if (likely(!error)) { |
159 | vn_revalidate_core(vp, vattr); | |
1da177e4 LT |
160 | VUNMODIFY(vp); |
161 | } | |
162 | return -error; | |
163 | } | |
164 | ||
220b5284 NS |
165 | int |
166 | vn_revalidate( | |
67fcaa73 | 167 | bhv_vnode_t *vp) |
220b5284 | 168 | { |
8285fb58 | 169 | bhv_vattr_t vattr; |
220b5284 NS |
170 | |
171 | return __vn_revalidate(vp, &vattr); | |
172 | } | |
173 | ||
1da177e4 LT |
174 | /* |
175 | * Add a reference to a referenced vnode. | |
176 | */ | |
67fcaa73 | 177 | bhv_vnode_t * |
1da177e4 | 178 | vn_hold( |
67fcaa73 | 179 | bhv_vnode_t *vp) |
1da177e4 LT |
180 | { |
181 | struct inode *inode; | |
182 | ||
183 | XFS_STATS_INC(vn_hold); | |
184 | ||
185 | VN_LOCK(vp); | |
ec86dc02 | 186 | inode = igrab(vn_to_inode(vp)); |
1da177e4 LT |
187 | ASSERT(inode); |
188 | VN_UNLOCK(vp, 0); | |
189 | ||
190 | return vp; | |
191 | } | |
192 | ||
1da177e4 LT |
193 | #ifdef XFS_VNODE_TRACE |
194 | ||
195 | #define KTRACE_ENTER(vp, vk, s, line, ra) \ | |
196 | ktrace_enter( (vp)->v_trace, \ | |
197 | /* 0 */ (void *)(__psint_t)(vk), \ | |
198 | /* 1 */ (void *)(s), \ | |
199 | /* 2 */ (void *)(__psint_t) line, \ | |
02de1f0a | 200 | /* 3 */ (void *)(__psint_t)(vn_count(vp)), \ |
1da177e4 LT |
201 | /* 4 */ (void *)(ra), \ |
202 | /* 5 */ (void *)(__psunsigned_t)(vp)->v_flag, \ | |
203 | /* 6 */ (void *)(__psint_t)current_cpu(), \ | |
204 | /* 7 */ (void *)(__psint_t)current_pid(), \ | |
205 | /* 8 */ (void *)__return_address, \ | |
02de1f0a | 206 | /* 9 */ NULL, NULL, NULL, NULL, NULL, NULL, NULL) |
1da177e4 LT |
207 | |
208 | /* | |
209 | * Vnode tracing code. | |
210 | */ | |
211 | void | |
67fcaa73 | 212 | vn_trace_entry(bhv_vnode_t *vp, const char *func, inst_t *ra) |
1da177e4 LT |
213 | { |
214 | KTRACE_ENTER(vp, VNODE_KTRACE_ENTRY, func, 0, ra); | |
215 | } | |
216 | ||
217 | void | |
67fcaa73 | 218 | vn_trace_exit(bhv_vnode_t *vp, const char *func, inst_t *ra) |
1da177e4 LT |
219 | { |
220 | KTRACE_ENTER(vp, VNODE_KTRACE_EXIT, func, 0, ra); | |
221 | } | |
222 | ||
223 | void | |
67fcaa73 | 224 | vn_trace_hold(bhv_vnode_t *vp, char *file, int line, inst_t *ra) |
1da177e4 LT |
225 | { |
226 | KTRACE_ENTER(vp, VNODE_KTRACE_HOLD, file, line, ra); | |
227 | } | |
228 | ||
229 | void | |
67fcaa73 | 230 | vn_trace_ref(bhv_vnode_t *vp, char *file, int line, inst_t *ra) |
1da177e4 LT |
231 | { |
232 | KTRACE_ENTER(vp, VNODE_KTRACE_REF, file, line, ra); | |
233 | } | |
234 | ||
235 | void | |
67fcaa73 | 236 | vn_trace_rele(bhv_vnode_t *vp, char *file, int line, inst_t *ra) |
1da177e4 LT |
237 | { |
238 | KTRACE_ENTER(vp, VNODE_KTRACE_RELE, file, line, ra); | |
239 | } | |
240 | #endif /* XFS_VNODE_TRACE */ |