146 lines
3.4 KiB
C
146 lines
3.4 KiB
C
/*
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* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_vnodeops.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_inode.h"
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/*
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* And this gunk is needed for xfs_mount.h"
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*/
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#include "xfs_log.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_dmapi.h"
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#include "xfs_inum.h"
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#include "xfs_ag.h"
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#include "xfs_mount.h"
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/*
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* Dedicated vnode inactive/reclaim sync wait queues.
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* Prime number of hash buckets since address is used as the key.
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*/
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#define NVSYNC 37
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#define vptosync(v) (&vsync[((unsigned long)v) % NVSYNC])
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static wait_queue_head_t vsync[NVSYNC];
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void __init
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vn_init(void)
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{
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int i;
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for (i = 0; i < NVSYNC; i++)
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init_waitqueue_head(&vsync[i]);
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}
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void
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vn_iowait(
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xfs_inode_t *ip)
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{
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wait_queue_head_t *wq = vptosync(ip);
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wait_event(*wq, (atomic_read(&ip->i_iocount) == 0));
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}
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void
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vn_iowake(
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xfs_inode_t *ip)
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{
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if (atomic_dec_and_test(&ip->i_iocount))
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wake_up(vptosync(ip));
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}
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/*
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* Volume managers supporting multiple paths can send back ENODEV when the
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* final path disappears. In this case continuing to fill the page cache
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* with dirty data which cannot be written out is evil, so prevent that.
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*/
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void
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vn_ioerror(
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xfs_inode_t *ip,
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int error,
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char *f,
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int l)
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{
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if (unlikely(error == -ENODEV))
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xfs_do_force_shutdown(ip->i_mount, SHUTDOWN_DEVICE_REQ, f, l);
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}
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#ifdef XFS_INODE_TRACE
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/*
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* Reference count of Linux inode if present, -1 if the xfs_inode
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* has no associated Linux inode.
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*/
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static inline int xfs_icount(struct xfs_inode *ip)
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{
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struct inode *vp = VFS_I(ip);
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if (vp)
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return vn_count(vp);
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return -1;
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}
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#define KTRACE_ENTER(ip, vk, s, line, ra) \
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ktrace_enter( (ip)->i_trace, \
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/* 0 */ (void *)(__psint_t)(vk), \
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/* 1 */ (void *)(s), \
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/* 2 */ (void *)(__psint_t) line, \
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/* 3 */ (void *)(__psint_t)xfs_icount(ip), \
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/* 4 */ (void *)(ra), \
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/* 5 */ NULL, \
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/* 6 */ (void *)(__psint_t)current_cpu(), \
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/* 7 */ (void *)(__psint_t)current_pid(), \
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/* 8 */ (void *)__return_address, \
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/* 9 */ NULL, NULL, NULL, NULL, NULL, NULL, NULL)
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/*
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* Vnode tracing code.
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*/
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void
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_xfs_itrace_entry(xfs_inode_t *ip, const char *func, inst_t *ra)
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{
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KTRACE_ENTER(ip, INODE_KTRACE_ENTRY, func, 0, ra);
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}
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void
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_xfs_itrace_exit(xfs_inode_t *ip, const char *func, inst_t *ra)
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{
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KTRACE_ENTER(ip, INODE_KTRACE_EXIT, func, 0, ra);
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}
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void
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xfs_itrace_hold(xfs_inode_t *ip, char *file, int line, inst_t *ra)
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{
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KTRACE_ENTER(ip, INODE_KTRACE_HOLD, file, line, ra);
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}
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void
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_xfs_itrace_ref(xfs_inode_t *ip, char *file, int line, inst_t *ra)
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{
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KTRACE_ENTER(ip, INODE_KTRACE_REF, file, line, ra);
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}
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void
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xfs_itrace_rele(xfs_inode_t *ip, char *file, int line, inst_t *ra)
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{
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KTRACE_ENTER(ip, INODE_KTRACE_RELE, file, line, ra);
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}
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#endif /* XFS_INODE_TRACE */
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