2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
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
7 * published by the Free Software Foundation.
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.
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
19 #include "xfs_vnodeops.h"
20 #include "xfs_bmap_btree.h"
21 #include "xfs_inode.h"
23 uint64_t vn_generation; /* vnode generation number */
24 DEFINE_SPINLOCK(vnumber_lock);
27 * Dedicated vnode inactive/reclaim sync semaphores.
28 * Prime number of hash buckets since address is used as the key.
31 #define vptosync(v) (&vsync[((unsigned long)v) % NVSYNC])
32 static wait_queue_head_t vsync[NVSYNC];
39 for (i = 0; i < NVSYNC; i++)
40 init_waitqueue_head(&vsync[i]);
47 wait_queue_head_t *wq = vptosync(vp);
49 wait_event(*wq, (atomic_read(&vp->v_iocount) == 0));
56 if (atomic_dec_and_test(&vp->v_iocount))
57 wake_up(vptosync(vp));
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.
72 bhv_vfs_t *vfsp = vfs_from_sb(vp->v_inode.i_sb);
74 if (unlikely(error == -ENODEV))
75 bhv_vfs_force_shutdown(vfsp, SHUTDOWN_DEVICE_REQ, f, l);
82 bhv_vnode_t *vp = vn_from_inode(inode);
84 XFS_STATS_INC(vn_active);
85 XFS_STATS_INC(vn_alloc);
87 vp->v_flag = VMODIFIED;
88 spinlock_init(&vp->v_lock, "v_lock");
90 spin_lock(&vnumber_lock);
91 if (!++vn_generation) /* v_number shouldn't be zero */
93 vp->v_number = vn_generation;
94 spin_unlock(&vnumber_lock);
96 ASSERT(VN_CACHED(vp) == 0);
98 atomic_set(&vp->v_iocount, 0);
100 #ifdef XFS_VNODE_TRACE
101 vp->v_trace = ktrace_alloc(VNODE_TRACE_SIZE, KM_SLEEP);
102 #endif /* XFS_VNODE_TRACE */
104 vn_trace_exit(vp, __FUNCTION__, (inst_t *)__return_address);
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.
118 struct inode *inode = vn_to_inode(vp);
120 inode->i_mode = vap->va_mode;
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;
127 if (vap->va_xflags & XFS_XFLAG_IMMUTABLE)
128 inode->i_flags |= S_IMMUTABLE;
130 inode->i_flags &= ~S_IMMUTABLE;
131 if (vap->va_xflags & XFS_XFLAG_APPEND)
132 inode->i_flags |= S_APPEND;
134 inode->i_flags &= ~S_APPEND;
135 if (vap->va_xflags & XFS_XFLAG_SYNC)
136 inode->i_flags |= S_SYNC;
138 inode->i_flags &= ~S_SYNC;
139 if (vap->va_xflags & XFS_XFLAG_NOATIME)
140 inode->i_flags |= S_NOATIME;
142 inode->i_flags &= ~S_NOATIME;
146 * Revalidate the Linux inode from the vnode.
155 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
156 vattr->va_mask = XFS_AT_STAT | XFS_AT_XFLAGS;
157 error = xfs_getattr(xfs_vtoi(vp), vattr, 0);
158 if (likely(!error)) {
159 vn_revalidate_core(vp, vattr);
171 return __vn_revalidate(vp, &vattr);
175 * Add a reference to a referenced vnode.
183 XFS_STATS_INC(vn_hold);
186 inode = igrab(vn_to_inode(vp));
193 #ifdef XFS_VNODE_TRACE
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, \
200 /* 3 */ (void *)(__psint_t)(vn_count(vp)), \
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, \
206 /* 9 */ NULL, NULL, NULL, NULL, NULL, NULL, NULL)
209 * Vnode tracing code.
212 vn_trace_entry(bhv_vnode_t *vp, const char *func, inst_t *ra)
214 KTRACE_ENTER(vp, VNODE_KTRACE_ENTRY, func, 0, ra);
218 vn_trace_exit(bhv_vnode_t *vp, const char *func, inst_t *ra)
220 KTRACE_ENTER(vp, VNODE_KTRACE_EXIT, func, 0, ra);
224 vn_trace_hold(bhv_vnode_t *vp, char *file, int line, inst_t *ra)
226 KTRACE_ENTER(vp, VNODE_KTRACE_HOLD, file, line, ra);
230 vn_trace_ref(bhv_vnode_t *vp, char *file, int line, inst_t *ra)
232 KTRACE_ENTER(vp, VNODE_KTRACE_REF, file, line, ra);
236 vn_trace_rele(bhv_vnode_t *vp, char *file, int line, inst_t *ra)
238 KTRACE_ENTER(vp, VNODE_KTRACE_RELE, file, line, ra);
240 #endif /* XFS_VNODE_TRACE */