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"
24 * And this gunk is needed for xfs_mount.h"
27 #include "xfs_trans.h"
29 #include "xfs_dmapi.h"
32 #include "xfs_mount.h"
34 uint64_t vn_generation; /* vnode generation number */
35 DEFINE_SPINLOCK(vnumber_lock);
38 * Dedicated vnode inactive/reclaim sync semaphores.
39 * Prime number of hash buckets since address is used as the key.
42 #define vptosync(v) (&vsync[((unsigned long)v) % NVSYNC])
43 static wait_queue_head_t vsync[NVSYNC];
50 for (i = 0; i < NVSYNC; i++)
51 init_waitqueue_head(&vsync[i]);
58 wait_queue_head_t *wq = vptosync(ip);
60 wait_event(*wq, (atomic_read(&ip->i_iocount) == 0));
67 if (atomic_dec_and_test(&ip->i_iocount))
68 wake_up(vptosync(ip));
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.
83 bhv_vfs_t *vfsp = XFS_MTOVFS(ip->i_mount);
85 if (unlikely(error == -ENODEV))
86 bhv_vfs_force_shutdown(vfsp, SHUTDOWN_DEVICE_REQ, f, l);
93 bhv_vnode_t *vp = vn_from_inode(inode);
95 XFS_STATS_INC(vn_active);
96 XFS_STATS_INC(vn_alloc);
98 spin_lock(&vnumber_lock);
99 if (!++vn_generation) /* v_number shouldn't be zero */
101 vp->v_number = vn_generation;
102 spin_unlock(&vnumber_lock);
104 ASSERT(VN_CACHED(vp) == 0);
110 * Revalidate the Linux inode from the vattr.
111 * Note: i_size _not_ updated; we must hold the inode
112 * semaphore when doing that - callers responsibility.
119 struct inode *inode = vn_to_inode(vp);
121 inode->i_mode = vap->va_mode;
122 inode->i_nlink = vap->va_nlink;
123 inode->i_uid = vap->va_uid;
124 inode->i_gid = vap->va_gid;
125 inode->i_blocks = vap->va_nblocks;
126 inode->i_mtime = vap->va_mtime;
127 inode->i_ctime = vap->va_ctime;
128 if (vap->va_xflags & XFS_XFLAG_IMMUTABLE)
129 inode->i_flags |= S_IMMUTABLE;
131 inode->i_flags &= ~S_IMMUTABLE;
132 if (vap->va_xflags & XFS_XFLAG_APPEND)
133 inode->i_flags |= S_APPEND;
135 inode->i_flags &= ~S_APPEND;
136 if (vap->va_xflags & XFS_XFLAG_SYNC)
137 inode->i_flags |= S_SYNC;
139 inode->i_flags &= ~S_SYNC;
140 if (vap->va_xflags & XFS_XFLAG_NOATIME)
141 inode->i_flags |= S_NOATIME;
143 inode->i_flags &= ~S_NOATIME;
147 * Revalidate the Linux inode from the vnode.
156 vn_trace_entry(xfs_vtoi(vp), __FUNCTION__, (inst_t *)__return_address);
157 vattr->va_mask = XFS_AT_STAT | XFS_AT_XFLAGS;
158 error = xfs_getattr(xfs_vtoi(vp), vattr, 0);
159 if (likely(!error)) {
160 vn_revalidate_core(vp, vattr);
161 xfs_iflags_clear(xfs_vtoi(vp), XFS_IMODIFIED);
172 return __vn_revalidate(vp, &vattr);
176 * Add a reference to a referenced vnode.
184 XFS_STATS_INC(vn_hold);
186 inode = igrab(vn_to_inode(vp));
192 #ifdef XFS_VNODE_TRACE
195 * Reference count of Linux inode if present, -1 if the xfs_inode
196 * has no associated Linux inode.
198 static inline int xfs_icount(struct xfs_inode *ip)
200 bhv_vnode_t *vp = XFS_ITOV_NULL(ip);
207 #define KTRACE_ENTER(ip, vk, s, line, ra) \
208 ktrace_enter( (ip)->i_trace, \
209 /* 0 */ (void *)(__psint_t)(vk), \
210 /* 1 */ (void *)(s), \
211 /* 2 */ (void *)(__psint_t) line, \
212 /* 3 */ (void *)(__psint_t)xfs_icount(ip), \
213 /* 4 */ (void *)(ra), \
215 /* 6 */ (void *)(__psint_t)current_cpu(), \
216 /* 7 */ (void *)(__psint_t)current_pid(), \
217 /* 8 */ (void *)__return_address, \
218 /* 9 */ NULL, NULL, NULL, NULL, NULL, NULL, NULL)
221 * Vnode tracing code.
224 vn_trace_entry(xfs_inode_t *ip, const char *func, inst_t *ra)
226 KTRACE_ENTER(ip, VNODE_KTRACE_ENTRY, func, 0, ra);
230 vn_trace_exit(xfs_inode_t *ip, const char *func, inst_t *ra)
232 KTRACE_ENTER(ip, VNODE_KTRACE_EXIT, func, 0, ra);
236 vn_trace_hold(xfs_inode_t *ip, char *file, int line, inst_t *ra)
238 KTRACE_ENTER(ip, VNODE_KTRACE_HOLD, file, line, ra);
242 vn_trace_ref(xfs_inode_t *ip, char *file, int line, inst_t *ra)
244 KTRACE_ENTER(ip, VNODE_KTRACE_REF, file, line, ra);
248 vn_trace_rele(xfs_inode_t *ip, char *file, int line, inst_t *ra)
250 KTRACE_ENTER(ip, VNODE_KTRACE_RELE, file, line, ra);
252 #endif /* XFS_VNODE_TRACE */