6f0419e06a
for_each_cpu() actually iterates across all possible CPUs. We've had mistakes in the past where people were using for_each_cpu() where they should have been iterating across only online or present CPUs. This is inefficient and possibly buggy. We're renaming for_each_cpu() to for_each_possible_cpu() to avoid this in the future. This patch replaces for_each_cpu with for_each_possible_cpu. in xfs. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Nathan Scott <nathans@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
160 lines
5 KiB
C
160 lines
5 KiB
C
/*
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* Copyright (c) 2001-2005 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 <linux/sysctl.h>
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#include <linux/proc_fs.h>
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static struct ctl_table_header *xfs_table_header;
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#ifdef CONFIG_PROC_FS
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STATIC int
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xfs_stats_clear_proc_handler(
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ctl_table *ctl,
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int write,
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struct file *filp,
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void __user *buffer,
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size_t *lenp,
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loff_t *ppos)
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{
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int c, ret, *valp = ctl->data;
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__uint32_t vn_active;
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ret = proc_dointvec_minmax(ctl, write, filp, buffer, lenp, ppos);
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if (!ret && write && *valp) {
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printk("XFS Clearing xfsstats\n");
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for_each_possible_cpu(c) {
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preempt_disable();
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/* save vn_active, it's a universal truth! */
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vn_active = per_cpu(xfsstats, c).vn_active;
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memset(&per_cpu(xfsstats, c), 0,
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sizeof(struct xfsstats));
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per_cpu(xfsstats, c).vn_active = vn_active;
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preempt_enable();
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}
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xfs_stats_clear = 0;
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}
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return ret;
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}
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#endif /* CONFIG_PROC_FS */
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STATIC ctl_table xfs_table[] = {
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{XFS_RESTRICT_CHOWN, "restrict_chown", &xfs_params.restrict_chown.val,
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sizeof(int), 0644, NULL, &proc_dointvec_minmax,
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&sysctl_intvec, NULL,
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&xfs_params.restrict_chown.min, &xfs_params.restrict_chown.max},
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{XFS_SGID_INHERIT, "irix_sgid_inherit", &xfs_params.sgid_inherit.val,
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sizeof(int), 0644, NULL, &proc_dointvec_minmax,
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&sysctl_intvec, NULL,
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&xfs_params.sgid_inherit.min, &xfs_params.sgid_inherit.max},
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{XFS_SYMLINK_MODE, "irix_symlink_mode", &xfs_params.symlink_mode.val,
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sizeof(int), 0644, NULL, &proc_dointvec_minmax,
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&sysctl_intvec, NULL,
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&xfs_params.symlink_mode.min, &xfs_params.symlink_mode.max},
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{XFS_PANIC_MASK, "panic_mask", &xfs_params.panic_mask.val,
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sizeof(int), 0644, NULL, &proc_dointvec_minmax,
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&sysctl_intvec, NULL,
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&xfs_params.panic_mask.min, &xfs_params.panic_mask.max},
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{XFS_ERRLEVEL, "error_level", &xfs_params.error_level.val,
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sizeof(int), 0644, NULL, &proc_dointvec_minmax,
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&sysctl_intvec, NULL,
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&xfs_params.error_level.min, &xfs_params.error_level.max},
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{XFS_SYNCD_TIMER, "xfssyncd_centisecs", &xfs_params.syncd_timer.val,
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sizeof(int), 0644, NULL, &proc_dointvec_minmax,
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&sysctl_intvec, NULL,
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&xfs_params.syncd_timer.min, &xfs_params.syncd_timer.max},
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{XFS_INHERIT_SYNC, "inherit_sync", &xfs_params.inherit_sync.val,
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sizeof(int), 0644, NULL, &proc_dointvec_minmax,
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&sysctl_intvec, NULL,
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&xfs_params.inherit_sync.min, &xfs_params.inherit_sync.max},
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{XFS_INHERIT_NODUMP, "inherit_nodump", &xfs_params.inherit_nodump.val,
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sizeof(int), 0644, NULL, &proc_dointvec_minmax,
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&sysctl_intvec, NULL,
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&xfs_params.inherit_nodump.min, &xfs_params.inherit_nodump.max},
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{XFS_INHERIT_NOATIME, "inherit_noatime", &xfs_params.inherit_noatim.val,
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sizeof(int), 0644, NULL, &proc_dointvec_minmax,
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&sysctl_intvec, NULL,
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&xfs_params.inherit_noatim.min, &xfs_params.inherit_noatim.max},
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{XFS_BUF_TIMER, "xfsbufd_centisecs", &xfs_params.xfs_buf_timer.val,
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sizeof(int), 0644, NULL, &proc_dointvec_minmax,
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&sysctl_intvec, NULL,
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&xfs_params.xfs_buf_timer.min, &xfs_params.xfs_buf_timer.max},
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{XFS_BUF_AGE, "age_buffer_centisecs", &xfs_params.xfs_buf_age.val,
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sizeof(int), 0644, NULL, &proc_dointvec_minmax,
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&sysctl_intvec, NULL,
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&xfs_params.xfs_buf_age.min, &xfs_params.xfs_buf_age.max},
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{XFS_INHERIT_NOSYM, "inherit_nosymlinks", &xfs_params.inherit_nosym.val,
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sizeof(int), 0644, NULL, &proc_dointvec_minmax,
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&sysctl_intvec, NULL,
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&xfs_params.inherit_nosym.min, &xfs_params.inherit_nosym.max},
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{XFS_ROTORSTEP, "rotorstep", &xfs_params.rotorstep.val,
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sizeof(int), 0644, NULL, &proc_dointvec_minmax,
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&sysctl_intvec, NULL,
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&xfs_params.rotorstep.min, &xfs_params.rotorstep.max},
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{XFS_INHERIT_NODFRG, "inherit_nodefrag", &xfs_params.inherit_nodfrg.val,
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sizeof(int), 0644, NULL, &proc_dointvec_minmax,
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&sysctl_intvec, NULL,
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&xfs_params.inherit_nodfrg.min, &xfs_params.inherit_nodfrg.max},
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/* please keep this the last entry */
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#ifdef CONFIG_PROC_FS
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{XFS_STATS_CLEAR, "stats_clear", &xfs_params.stats_clear.val,
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sizeof(int), 0644, NULL, &xfs_stats_clear_proc_handler,
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&sysctl_intvec, NULL,
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&xfs_params.stats_clear.min, &xfs_params.stats_clear.max},
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#endif /* CONFIG_PROC_FS */
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{0}
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};
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STATIC ctl_table xfs_dir_table[] = {
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{FS_XFS, "xfs", NULL, 0, 0555, xfs_table},
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{0}
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};
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STATIC ctl_table xfs_root_table[] = {
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{CTL_FS, "fs", NULL, 0, 0555, xfs_dir_table},
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{0}
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};
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void
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xfs_sysctl_register(void)
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{
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xfs_table_header = register_sysctl_table(xfs_root_table, 1);
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}
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void
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xfs_sysctl_unregister(void)
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{
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if (xfs_table_header)
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unregister_sysctl_table(xfs_table_header);
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}
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