mirror of https://gitee.com/openkylin/linux.git
[PATCH] namespaces: utsname: sysctl
Sysctl uts patch. This will need to be done another way, but since sysctl itself needs to be container aware, 'the right thing' is a separate patchset. [akpm@osdl.org: ia64 build fix] [sam.vilain@catalyst.net.nz: cleanup] [sam.vilain@catalyst.net.nz: add proc_do_utsns_string] Signed-off-by: Serge E. Hallyn <serue@us.ibm.com> Cc: Kirill Korotaev <dev@openvz.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Herbert Poetzl <herbert@13thfloor.at> Cc: Andrey Savochkin <saw@sw.ru> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Serge E. Hallyn
Linus Torvalds
parent
4865ecf131
commit
8218c74c02
138
kernel/sysctl.c
138
kernel/sysctl.c
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@ -139,7 +139,7 @@ static int parse_table(int __user *, int, void __user *, size_t __user *,
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void __user *, size_t, ctl_table *, void **);
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#endif
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static int proc_doutsstring(ctl_table *table, int write, struct file *filp,
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static int proc_do_uts_string(ctl_table *table, int write, struct file *filp,
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void __user *buffer, size_t *lenp, loff_t *ppos);
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static ctl_table root_table[];
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@ -229,51 +229,100 @@ static ctl_table root_table[] = {
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};
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static ctl_table kern_table[] = {
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#ifndef CONFIG_UTS_NS
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{
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.ctl_name = KERN_OSTYPE,
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.procname = "ostype",
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.data = system_utsname.sysname,
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.maxlen = sizeof(system_utsname.sysname),
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.data = init_uts_ns.name.sysname,
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.maxlen = sizeof(init_uts_ns.name.sysname),
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.mode = 0444,
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.proc_handler = &proc_doutsstring,
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.proc_handler = &proc_do_uts_string,
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.strategy = &sysctl_string,
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},
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{
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.ctl_name = KERN_OSRELEASE,
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.procname = "osrelease",
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.data = system_utsname.release,
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.maxlen = sizeof(system_utsname.release),
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.data = init_uts_ns.name.release,
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.maxlen = sizeof(init_uts_ns.name.release),
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.mode = 0444,
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.proc_handler = &proc_doutsstring,
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.proc_handler = &proc_do_uts_string,
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.strategy = &sysctl_string,
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},
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{
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.ctl_name = KERN_VERSION,
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.procname = "version",
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.data = system_utsname.version,
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.maxlen = sizeof(system_utsname.version),
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.data = init_uts_ns.name.version,
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.maxlen = sizeof(init_uts_ns.name.version),
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.mode = 0444,
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.proc_handler = &proc_doutsstring,
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.proc_handler = &proc_do_uts_string,
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.strategy = &sysctl_string,
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},
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{
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.ctl_name = KERN_NODENAME,
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.procname = "hostname",
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.data = system_utsname.nodename,
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.maxlen = sizeof(system_utsname.nodename),
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.data = init_uts_ns.name.nodename,
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.maxlen = sizeof(init_uts_ns.name.nodename),
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.mode = 0644,
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.proc_handler = &proc_doutsstring,
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.proc_handler = &proc_do_uts_string,
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.strategy = &sysctl_string,
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},
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{
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.ctl_name = KERN_DOMAINNAME,
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.procname = "domainname",
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.data = system_utsname.domainname,
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.maxlen = sizeof(system_utsname.domainname),
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.data = init_uts_ns.name.domainname,
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.maxlen = sizeof(init_uts_ns.name.domainname),
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.mode = 0644,
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.proc_handler = &proc_doutsstring,
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.proc_handler = &proc_do_uts_string,
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.strategy = &sysctl_string,
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},
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#else /* !CONFIG_UTS_NS */
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{
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.ctl_name = KERN_OSTYPE,
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.procname = "ostype",
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.data = NULL,
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/* could maybe use __NEW_UTS_LEN here? */
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.maxlen = FIELD_SIZEOF(struct new_utsname, sysname),
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.mode = 0444,
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.proc_handler = &proc_do_uts_string,
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.strategy = &sysctl_string,
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},
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{
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.ctl_name = KERN_OSRELEASE,
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.procname = "osrelease",
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.data = NULL,
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.maxlen = FIELD_SIZEOF(struct new_utsname, release),
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.mode = 0444,
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.proc_handler = &proc_do_uts_string,
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.strategy = &sysctl_string,
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},
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{
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.ctl_name = KERN_VERSION,
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.procname = "version",
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.data = NULL,
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.maxlen = FIELD_SIZEOF(struct new_utsname, version),
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.mode = 0444,
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.proc_handler = &proc_do_uts_string,
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.strategy = &sysctl_string,
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},
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{
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.ctl_name = KERN_NODENAME,
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.procname = "hostname",
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.data = NULL,
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.maxlen = FIELD_SIZEOF(struct new_utsname, nodename),
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.mode = 0644,
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.proc_handler = &proc_do_uts_string,
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.strategy = &sysctl_string,
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},
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{
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.ctl_name = KERN_DOMAINNAME,
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.procname = "domainname",
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.data = NULL,
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.maxlen = FIELD_SIZEOF(struct new_utsname, domainname),
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.mode = 0644,
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.proc_handler = &proc_do_uts_string,
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.strategy = &sysctl_string,
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},
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#endif /* !CONFIG_UTS_NS */
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{
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.ctl_name = KERN_PANIC,
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.procname = "panic",
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@ -1704,7 +1753,8 @@ int proc_dostring(ctl_table *table, int write, struct file *filp,
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* to observe. Should this be in kernel/sys.c ????
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*/
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static int proc_doutsstring(ctl_table *table, int write, struct file *filp,
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#ifndef CONFIG_UTS_NS
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static int proc_do_uts_string(ctl_table *table, int write, struct file *filp,
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void __user *buffer, size_t *lenp, loff_t *ppos)
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{
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int r;
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@ -1720,6 +1770,48 @@ static int proc_doutsstring(ctl_table *table, int write, struct file *filp,
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}
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return r;
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}
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#else /* !CONFIG_UTS_NS */
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static int proc_do_uts_string(ctl_table *table, int write, struct file *filp,
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void __user *buffer, size_t *lenp, loff_t *ppos)
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{
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int r;
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struct uts_namespace* uts_ns = current->nsproxy->uts_ns;
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char* which;
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switch (table->ctl_name) {
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case KERN_OSTYPE:
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which = uts_ns->name.sysname;
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break;
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case KERN_NODENAME:
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which = uts_ns->name.nodename;
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break;
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case KERN_OSRELEASE:
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which = uts_ns->name.release;
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break;
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case KERN_VERSION:
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which = uts_ns->name.version;
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break;
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case KERN_DOMAINNAME:
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which = uts_ns->name.domainname;
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break;
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default:
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r = -EINVAL;
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goto out;
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}
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if (!write) {
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down_read(&uts_sem);
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r=_proc_do_string(which,table->maxlen,0,filp,buffer,lenp, ppos);
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up_read(&uts_sem);
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} else {
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down_write(&uts_sem);
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r=_proc_do_string(which,table->maxlen,1,filp,buffer,lenp, ppos);
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up_write(&uts_sem);
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}
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out:
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return r;
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}
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#endif /* !CONFIG_UTS_NS */
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static int do_proc_dointvec_conv(int *negp, unsigned long *lvalp,
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int *valp,
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@ -2283,12 +2375,20 @@ int proc_dostring(ctl_table *table, int write, struct file *filp,
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return -ENOSYS;
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}
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static int proc_doutsstring(ctl_table *table, int write, struct file *filp,
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void __user *buffer, size_t *lenp, loff_t *ppos)
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static int proc_do_uts_string(ctl_table *table, int write, struct file *filp,
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void __user *buffer, size_t *lenp, loff_t *ppos)
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{
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return -ENOSYS;
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}
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#ifdef CONFIG_SYSVIPC
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static int proc_do_ipc_string(ctl_table *table, int write, struct file *filp,
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void __user *buffer, size_t *lenp, loff_t *ppos)
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{
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return -ENOSYS;
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}
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#endif
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int proc_dointvec(ctl_table *table, int write, struct file *filp,
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void __user *buffer, size_t *lenp, loff_t *ppos)
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{
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