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![Christoph Hellwig](/assets/img/avatar_default.png)
Instead of having all the sysctl handlers deal with user pointers, which is rather hairy in terms of the BPF interaction, copy the input to and from userspace in common code. This also means that the strings are always NUL-terminated by the common code, making the API a little bit safer. As most handler just pass through the data to one of the common handlers a lot of the changes are mechnical. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Andrey Ignatov <rdna@fb.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
228 lines
5.2 KiB
C
228 lines
5.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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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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#include "xfs.h"
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#include "xfs_error.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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struct ctl_table *ctl,
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int write,
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void *buffer,
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size_t *lenp,
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loff_t *ppos)
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{
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int ret, *valp = ctl->data;
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ret = proc_dointvec_minmax(ctl, write, buffer, lenp, ppos);
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if (!ret && write && *valp) {
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xfs_stats_clearall(xfsstats.xs_stats);
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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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STATIC int
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xfs_panic_mask_proc_handler(
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struct ctl_table *ctl,
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int write,
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void *buffer,
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size_t *lenp,
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loff_t *ppos)
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{
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int ret, *valp = ctl->data;
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ret = proc_dointvec_minmax(ctl, write, buffer, lenp, ppos);
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if (!ret && write) {
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xfs_panic_mask = *valp;
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#ifdef DEBUG
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xfs_panic_mask |= (XFS_PTAG_SHUTDOWN_CORRUPT | XFS_PTAG_LOGRES);
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#endif
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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 struct ctl_table xfs_table[] = {
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{
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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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.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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.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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.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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.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 = xfs_panic_mask_proc_handler,
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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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.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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.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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.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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.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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.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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.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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.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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.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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.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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.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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.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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.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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.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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.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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.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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.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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.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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.extra1 = &xfs_params.fstrm_timer.min,
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.extra2 = &xfs_params.fstrm_timer.max,
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},
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{
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.procname = "speculative_prealloc_lifetime",
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.data = &xfs_params.eofb_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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.extra1 = &xfs_params.eofb_timer.min,
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.extra2 = &xfs_params.eofb_timer.max,
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},
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{
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.procname = "speculative_cow_prealloc_lifetime",
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.data = &xfs_params.cowb_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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.extra1 = &xfs_params.cowb_timer.min,
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.extra2 = &xfs_params.cowb_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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.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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.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 struct ctl_table xfs_dir_table[] = {
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{
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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 struct ctl_table xfs_root_table[] = {
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{
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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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