9f8868ffb3
Currently the xfs module init/exit code is a mess. It's farmed out over a lot of function with very little error checking. This patch makes sure we propagate all initialization failures properly and clean up after them. Various runtime initializations are replaced with compile-time initializations where possible to make this easier. The exit path is similarly consolidated. There's now split out function to create/destroy the kmem zones and alloc/free the trace buffers. I've also changed the ktrace allocations to KM_MAYFAIL and handled errors resulting from that. And yes, we really should replace the XFS_*_TRACE ifdefs with a single XFS_TRACE.. SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:31354a Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Niv Sardi <xaiki@sgi.com> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
276 lines
7.0 KiB
C
276 lines
7.0 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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{
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.ctl_name = XFS_RESTRICT_CHOWN,
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.procname = "restrict_chown",
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.data = &xfs_params.restrict_chown.val,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &xfs_params.restrict_chown.min,
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.extra2 = &xfs_params.restrict_chown.max
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},
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{
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.ctl_name = XFS_SGID_INHERIT,
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.procname = "irix_sgid_inherit",
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.data = &xfs_params.sgid_inherit.val,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &xfs_params.sgid_inherit.min,
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.extra2 = &xfs_params.sgid_inherit.max
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},
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{
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.ctl_name = XFS_SYMLINK_MODE,
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.procname = "irix_symlink_mode",
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.data = &xfs_params.symlink_mode.val,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &xfs_params.symlink_mode.min,
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.extra2 = &xfs_params.symlink_mode.max
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},
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{
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.ctl_name = XFS_PANIC_MASK,
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.procname = "panic_mask",
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.data = &xfs_params.panic_mask.val,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &xfs_params.panic_mask.min,
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.extra2 = &xfs_params.panic_mask.max
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},
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{
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.ctl_name = XFS_ERRLEVEL,
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.procname = "error_level",
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.data = &xfs_params.error_level.val,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &xfs_params.error_level.min,
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.extra2 = &xfs_params.error_level.max
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},
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{
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.ctl_name = XFS_SYNCD_TIMER,
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.procname = "xfssyncd_centisecs",
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.data = &xfs_params.syncd_timer.val,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &xfs_params.syncd_timer.min,
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.extra2 = &xfs_params.syncd_timer.max
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},
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{
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.ctl_name = XFS_INHERIT_SYNC,
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.procname = "inherit_sync",
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.data = &xfs_params.inherit_sync.val,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &xfs_params.inherit_sync.min,
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.extra2 = &xfs_params.inherit_sync.max
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},
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{
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.ctl_name = XFS_INHERIT_NODUMP,
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.procname = "inherit_nodump",
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.data = &xfs_params.inherit_nodump.val,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &xfs_params.inherit_nodump.min,
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.extra2 = &xfs_params.inherit_nodump.max
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},
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{
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.ctl_name = XFS_INHERIT_NOATIME,
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.procname = "inherit_noatime",
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.data = &xfs_params.inherit_noatim.val,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &xfs_params.inherit_noatim.min,
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.extra2 = &xfs_params.inherit_noatim.max
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},
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{
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.ctl_name = XFS_BUF_TIMER,
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.procname = "xfsbufd_centisecs",
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.data = &xfs_params.xfs_buf_timer.val,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &xfs_params.xfs_buf_timer.min,
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.extra2 = &xfs_params.xfs_buf_timer.max
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},
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{
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.ctl_name = XFS_BUF_AGE,
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.procname = "age_buffer_centisecs",
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.data = &xfs_params.xfs_buf_age.val,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &xfs_params.xfs_buf_age.min,
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.extra2 = &xfs_params.xfs_buf_age.max
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},
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{
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.ctl_name = XFS_INHERIT_NOSYM,
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.procname = "inherit_nosymlinks",
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.data = &xfs_params.inherit_nosym.val,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &xfs_params.inherit_nosym.min,
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.extra2 = &xfs_params.inherit_nosym.max
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},
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{
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.ctl_name = XFS_ROTORSTEP,
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.procname = "rotorstep",
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.data = &xfs_params.rotorstep.val,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &xfs_params.rotorstep.min,
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.extra2 = &xfs_params.rotorstep.max
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},
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{
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.ctl_name = XFS_INHERIT_NODFRG,
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.procname = "inherit_nodefrag",
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.data = &xfs_params.inherit_nodfrg.val,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &xfs_params.inherit_nodfrg.min,
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.extra2 = &xfs_params.inherit_nodfrg.max
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},
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{
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.ctl_name = XFS_FILESTREAM_TIMER,
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.procname = "filestream_centisecs",
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.data = &xfs_params.fstrm_timer.val,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &xfs_params.fstrm_timer.min,
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.extra2 = &xfs_params.fstrm_timer.max,
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},
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/* please keep this the last entry */
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#ifdef CONFIG_PROC_FS
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{
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.ctl_name = XFS_STATS_CLEAR,
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.procname = "stats_clear",
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.data = &xfs_params.stats_clear.val,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &xfs_stats_clear_proc_handler,
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.strategy = &sysctl_intvec,
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.extra1 = &xfs_params.stats_clear.min,
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.extra2 = &xfs_params.stats_clear.max
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},
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#endif /* CONFIG_PROC_FS */
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{}
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};
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static ctl_table xfs_dir_table[] = {
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{
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.ctl_name = FS_XFS,
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.procname = "xfs",
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.mode = 0555,
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.child = xfs_table
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},
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{}
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};
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static ctl_table xfs_root_table[] = {
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{
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.ctl_name = CTL_FS,
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.procname = "fs",
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.mode = 0555,
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.child = xfs_dir_table
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},
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{}
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};
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int
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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);
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if (!xfs_table_header)
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return -ENOMEM;
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return 0;
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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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unregister_sysctl_table(xfs_table_header);
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}
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