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    Subject[RFC][PATCH 4/5] utsname namespaces: sysctl hack
    Date
    Sysctl uts patch.  This clearly will need to be done another way, but
    since sysctl itself needs to be container aware, 'the right thing' is
    a separate patchset.

    Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
    ---
    kernel/sysctl.c | 38 ++++++++++++++++++++++++++++----------
    1 files changed, 28 insertions(+), 10 deletions(-)

    40f7e1320c82efb6e875fc3bf44408cdfd093f21
    diff --git a/kernel/sysctl.c b/kernel/sysctl.c
    index e82726f..c2b18ef 100644
    --- a/kernel/sysctl.c
    +++ b/kernel/sysctl.c
    @@ -233,8 +233,8 @@ static ctl_table kern_table[] = {
    {
    .ctl_name = KERN_OSTYPE,
    .procname = "ostype",
    - .data = system_utsname.sysname,
    - .maxlen = sizeof(system_utsname.sysname),
    + .data = init_uts_ns.name.sysname,
    + .maxlen = sizeof(init_uts_ns.name.sysname),
    .mode = 0444,
    .proc_handler = &proc_doutsstring,
    .strategy = &sysctl_string,
    @@ -242,8 +242,8 @@ static ctl_table kern_table[] = {
    {
    .ctl_name = KERN_OSRELEASE,
    .procname = "osrelease",
    - .data = system_utsname.release,
    - .maxlen = sizeof(system_utsname.release),
    + .data = init_uts_ns.name.release,
    + .maxlen = sizeof(init_uts_ns.name.release),
    .mode = 0444,
    .proc_handler = &proc_doutsstring,
    .strategy = &sysctl_string,
    @@ -251,8 +251,8 @@ static ctl_table kern_table[] = {
    {
    .ctl_name = KERN_VERSION,
    .procname = "version",
    - .data = system_utsname.version,
    - .maxlen = sizeof(system_utsname.version),
    + .data = init_uts_ns.name.version,
    + .maxlen = sizeof(init_uts_ns.name.version),
    .mode = 0444,
    .proc_handler = &proc_doutsstring,
    .strategy = &sysctl_string,
    @@ -260,8 +260,8 @@ static ctl_table kern_table[] = {
    {
    .ctl_name = KERN_NODENAME,
    .procname = "hostname",
    - .data = system_utsname.nodename,
    - .maxlen = sizeof(system_utsname.nodename),
    + .data = init_uts_ns.name.nodename,
    + .maxlen = sizeof(init_uts_ns.name.nodename),
    .mode = 0644,
    .proc_handler = &proc_doutsstring,
    .strategy = &sysctl_string,
    @@ -269,8 +269,8 @@ static ctl_table kern_table[] = {
    {
    .ctl_name = KERN_DOMAINNAME,
    .procname = "domainname",
    - .data = system_utsname.domainname,
    - .maxlen = sizeof(system_utsname.domainname),
    + .data = init_uts_ns.name.domainname,
    + .maxlen = sizeof(init_uts_ns.name.domainname),
    .mode = 0644,
    .proc_handler = &proc_doutsstring,
    .strategy = &sysctl_string,
    @@ -1619,6 +1619,24 @@ static int proc_doutsstring(ctl_table *t
    {
    int r;

    + switch (table->ctl_name) {
    + case KERN_OSTYPE:
    + table->data = utsname()->sysname;
    + break;
    + case KERN_OSRELEASE:
    + table->data = utsname()->release;
    + break;
    + case KERN_VERSION:
    + table->data = utsname()->version;
    + break;
    + case KERN_NODENAME:
    + table->data = utsname()->nodename;
    + break;
    + case KERN_DOMAINNAME:
    + table->data = utsname()->domainname;
    + break;
    + }
    +
    if (!write) {
    down_read(&uts_sem);
    r=proc_dostring(table,0,filp,buffer,lenp, ppos);
    --
    1.2.4

    -
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