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58df095b73
If someone changes the uid/gid mapping in userland, then we do eventually want those changes to be propagated to the kernel. Currently the kernel assumes that it may cache entries forever. Add an expiration time + garbage collector for idmap entries. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
/*
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* linux/fs/nfs/sysctl.c
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*
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* Sysctl interface to NFS parameters
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*/
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#include <linux/config.h>
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#include <linux/types.h>
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#include <linux/linkage.h>
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#include <linux/ctype.h>
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#include <linux/fs.h>
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#include <linux/sysctl.h>
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#include <linux/module.h>
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#include <linux/nfs4.h>
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#include <linux/nfs_idmap.h>
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#include "callback.h"
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static const int nfs_set_port_min = 0;
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static const int nfs_set_port_max = 65535;
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static struct ctl_table_header *nfs_callback_sysctl_table;
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/*
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* Something that isn't CTL_ANY, CTL_NONE or a value that may clash.
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* Use the same values as fs/lockd/svc.c
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*/
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#define CTL_UNNUMBERED -2
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static ctl_table nfs_cb_sysctls[] = {
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#ifdef CONFIG_NFS_V4
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "nfs_callback_tcpport",
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.data = &nfs_callback_set_tcpport,
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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 = (int *)&nfs_set_port_min,
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.extra2 = (int *)&nfs_set_port_max,
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "idmap_cache_timeout",
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.data = &nfs_idmap_cache_timeout,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_jiffies,
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.strategy = &sysctl_jiffies,
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},
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#endif
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{ .ctl_name = 0 }
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};
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static ctl_table nfs_cb_sysctl_dir[] = {
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "nfs",
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.mode = 0555,
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.child = nfs_cb_sysctls,
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},
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{ .ctl_name = 0 }
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};
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static ctl_table nfs_cb_sysctl_root[] = {
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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 = nfs_cb_sysctl_dir,
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},
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{ .ctl_name = 0 }
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};
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int nfs_register_sysctl(void)
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{
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nfs_callback_sysctl_table = register_sysctl_table(nfs_cb_sysctl_root, 0);
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if (nfs_callback_sysctl_table == NULL)
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return -ENOMEM;
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return 0;
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}
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void nfs_unregister_sysctl(void)
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{
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unregister_sysctl_table(nfs_callback_sysctl_table);
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nfs_callback_sysctl_table = NULL;
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}
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