+++ /dev/null
-From 9e3f1d0805b2d919904dd9a4ff0d956314cc3cba Mon Sep 17 00:00:00 2001
-From: Felix Fietkau <nbd@nbd.name>
-Date: Sat, 8 Jul 2017 08:20:09 +0200
-Subject: debloat: procfs
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
- fs/locks.c | 2 ++
- fs/proc/Kconfig | 5 +++++
- fs/proc/consoles.c | 3 +++
- fs/proc/proc_tty.c | 11 ++++++++++-
- include/net/snmp.h | 18 +++++++++++++++++-
- ipc/msg.c | 3 +++
- ipc/sem.c | 2 ++
- ipc/shm.c | 2 ++
- ipc/util.c | 3 +++
- kernel/exec_domain.c | 2 ++
- kernel/irq/proc.c | 9 +++++++++
- kernel/time/timer_list.c | 2 ++
- mm/vmalloc.c | 2 ++
- mm/vmstat.c | 8 +++++---
- net/8021q/vlanproc.c | 6 ++++++
- net/core/net-procfs.c | 18 ++++++++++++------
- net/core/sock.c | 2 ++
- net/ipv4/fib_trie.c | 18 ++++++++++++------
- net/ipv4/proc.c | 3 +++
- net/ipv4/route.c | 3 +++
- 20 files changed, 105 insertions(+), 17 deletions(-)
-
---- a/fs/locks.c
-+++ b/fs/locks.c
-@@ -2961,6 +2961,8 @@ static const struct seq_operations locks
-
- static int __init proc_locks_init(void)
- {
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ return 0;
- proc_create_seq_private("locks", 0, NULL, &locks_seq_operations,
- sizeof(struct locks_iterator), NULL);
- return 0;
---- a/fs/proc/Kconfig
-+++ b/fs/proc/Kconfig
-@@ -100,6 +100,11 @@ config PROC_CHILDREN
- Say Y if you are running any user-space software which takes benefit from
- this interface. For example, rkt is such a piece of software.
-
-+config PROC_STRIPPED
-+ default n
-+ depends on EXPERT
-+ bool "Strip non-essential /proc functionality to reduce code size"
-+
- config PROC_PID_ARCH_STATUS
- def_bool n
- depends on PROC_FS
---- a/fs/proc/consoles.c
-+++ b/fs/proc/consoles.c
-@@ -92,6 +92,9 @@ static const struct seq_operations conso
-
- static int __init proc_consoles_init(void)
- {
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ return 0;
-+
- proc_create_seq("consoles", 0, NULL, &consoles_op);
- return 0;
- }
---- a/fs/proc/proc_tty.c
-+++ b/fs/proc/proc_tty.c
-@@ -133,7 +133,10 @@ static const struct seq_operations tty_d
- void proc_tty_register_driver(struct tty_driver *driver)
- {
- struct proc_dir_entry *ent;
--
-+
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ return;
-+
- if (!driver->driver_name || driver->proc_entry ||
- !driver->ops->proc_show)
- return;
-@@ -150,6 +153,9 @@ void proc_tty_unregister_driver(struct t
- {
- struct proc_dir_entry *ent;
-
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ return;
-+
- ent = driver->proc_entry;
- if (!ent)
- return;
-@@ -164,6 +170,9 @@ void proc_tty_unregister_driver(struct t
- */
- void __init proc_tty_init(void)
- {
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ return;
-+
- if (!proc_mkdir("tty", NULL))
- return;
- proc_mkdir("tty/ldisc", NULL); /* Preserved: it's userspace visible */
---- a/include/net/snmp.h
-+++ b/include/net/snmp.h
-@@ -118,6 +118,21 @@ struct linux_xfrm_mib {
- #define DECLARE_SNMP_STAT(type, name) \
- extern __typeof__(type) __percpu *name
-
-+#ifdef CONFIG_PROC_STRIPPED
-+#define __SNMP_STATS_DUMMY(mib) \
-+ do { (void) mib->mibs[0]; } while(0)
-+
-+#define __SNMP_INC_STATS(mib, field) __SNMP_STATS_DUMMY(mib)
-+#define SNMP_INC_STATS_ATOMIC_LONG(mib, field) __SNMP_STATS_DUMMY(mib)
-+#define SNMP_INC_STATS(mib, field) __SNMP_STATS_DUMMY(mib)
-+#define SNMP_DEC_STATS(mib, field) __SNMP_STATS_DUMMY(mib)
-+#define __SNMP_ADD_STATS(mib, field, addend) __SNMP_STATS_DUMMY(mib)
-+#define SNMP_ADD_STATS(mib, field, addend) __SNMP_STATS_DUMMY(mib)
-+#define SNMP_UPD_PO_STATS(mib, basefield, addend) __SNMP_STATS_DUMMY(mib)
-+#define __SNMP_UPD_PO_STATS(mib, basefield, addend) __SNMP_STATS_DUMMY(mib)
-+
-+#else
-+
- #define __SNMP_INC_STATS(mib, field) \
- __this_cpu_inc(mib->mibs[field])
-
-@@ -148,8 +163,9 @@ struct linux_xfrm_mib {
- __this_cpu_add(ptr[basefield##OCTETS], addend); \
- } while (0)
-
-+#endif
-
--#if BITS_PER_LONG==32
-+#if (BITS_PER_LONG==32) && !defined(CONFIG_PROC_STRIPPED)
-
- #define __SNMP_ADD_STATS64(mib, field, addend) \
- do { \
---- a/ipc/msg.c
-+++ b/ipc/msg.c
-@@ -1317,6 +1317,9 @@ void __init msg_init(void)
- {
- msg_init_ns(&init_ipc_ns);
-
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ return;
-+
- ipc_init_proc_interface("sysvipc/msg",
- " key msqid perms cbytes qnum lspid lrpid uid gid cuid cgid stime rtime ctime\n",
- IPC_MSG_IDS, sysvipc_msg_proc_show);
---- a/ipc/sem.c
-+++ b/ipc/sem.c
-@@ -243,6 +243,8 @@ void sem_exit_ns(struct ipc_namespace *n
- void __init sem_init(void)
- {
- sem_init_ns(&init_ipc_ns);
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ return;
- ipc_init_proc_interface("sysvipc/sem",
- " key semid perms nsems uid gid cuid cgid otime ctime\n",
- IPC_SEM_IDS, sysvipc_sem_proc_show);
---- a/ipc/shm.c
-+++ b/ipc/shm.c
-@@ -144,6 +144,8 @@ pure_initcall(ipc_ns_init);
-
- void __init shm_init(void)
- {
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ return;
- ipc_init_proc_interface("sysvipc/shm",
- #if BITS_PER_LONG <= 32
- " key shmid perms size cpid lpid nattch uid gid cuid cgid atime dtime ctime rss swap\n",
---- a/ipc/util.c
-+++ b/ipc/util.c
-@@ -140,6 +140,9 @@ void __init ipc_init_proc_interface(cons
- struct proc_dir_entry *pde;
- struct ipc_proc_iface *iface;
-
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ return;
-+
- iface = kmalloc(sizeof(*iface), GFP_KERNEL);
- if (!iface)
- return;
---- a/kernel/exec_domain.c
-+++ b/kernel/exec_domain.c
-@@ -29,6 +29,8 @@ static int execdomains_proc_show(struct
-
- static int __init proc_execdomains_init(void)
- {
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ return 0;
- proc_create_single("execdomains", 0, NULL, execdomains_proc_show);
- return 0;
- }
---- a/kernel/irq/proc.c
-+++ b/kernel/irq/proc.c
-@@ -341,6 +341,9 @@ void register_irq_proc(unsigned int irq,
- void __maybe_unused *irqp = (void *)(unsigned long) irq;
- char name [MAX_NAMELEN];
-
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED) && !IS_ENABLED(CONFIG_SMP))
-+ return;
-+
- if (!root_irq_dir || (desc->irq_data.chip == &no_irq_chip))
- return;
-
-@@ -394,6 +397,9 @@ void unregister_irq_proc(unsigned int ir
- {
- char name [MAX_NAMELEN];
-
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED) && !IS_ENABLED(CONFIG_SMP))
-+ return;
-+
- if (!root_irq_dir || !desc->dir)
- return;
- #ifdef CONFIG_SMP
-@@ -432,6 +438,9 @@ void init_irq_proc(void)
- unsigned int irq;
- struct irq_desc *desc;
-
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED) && !IS_ENABLED(CONFIG_SMP))
-+ return;
-+
- /* create /proc/irq */
- root_irq_dir = proc_mkdir("irq", NULL);
- if (!root_irq_dir)
---- a/kernel/time/timer_list.c
-+++ b/kernel/time/timer_list.c
-@@ -370,6 +370,8 @@ static int __init init_timer_list_procfs
- {
- struct proc_dir_entry *pe;
-
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ return 0;
- pe = proc_create_seq_private("timer_list", 0400, NULL, &timer_list_sops,
- sizeof(struct timer_list_iter), NULL);
- if (!pe)
---- a/mm/vmalloc.c
-+++ b/mm/vmalloc.c
-@@ -3549,6 +3549,8 @@ static const struct seq_operations vmall
-
- static int __init proc_vmalloc_init(void)
- {
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ return 0;
- if (IS_ENABLED(CONFIG_NUMA))
- proc_create_seq_private("vmallocinfo", 0400, NULL,
- &vmalloc_op,
---- a/mm/vmstat.c
-+++ b/mm/vmstat.c
-@@ -1988,10 +1988,12 @@ void __init init_mm_internals(void)
- start_shepherd_timer();
- #endif
- #ifdef CONFIG_PROC_FS
-- proc_create_seq("buddyinfo", 0444, NULL, &fragmentation_op);
-- proc_create_seq("pagetypeinfo", 0400, NULL, &pagetypeinfo_op);
-+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED)) {
-+ proc_create_seq("buddyinfo", 0444, NULL, &fragmentation_op);
-+ proc_create_seq("pagetypeinfo", 0400, NULL, &pagetypeinfo_op);
-+ proc_create_seq("zoneinfo", 0444, NULL, &zoneinfo_op);
-+ }
- proc_create_seq("vmstat", 0444, NULL, &vmstat_op);
-- proc_create_seq("zoneinfo", 0444, NULL, &zoneinfo_op);
- #endif
- }
-
---- a/net/8021q/vlanproc.c
-+++ b/net/8021q/vlanproc.c
-@@ -93,6 +93,9 @@ void vlan_proc_cleanup(struct net *net)
- {
- struct vlan_net *vn = net_generic(net, vlan_net_id);
-
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ return;
-+
- if (vn->proc_vlan_conf)
- remove_proc_entry(name_conf, vn->proc_vlan_dir);
-
-@@ -112,6 +115,9 @@ int __net_init vlan_proc_init(struct net
- {
- struct vlan_net *vn = net_generic(net, vlan_net_id);
-
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ return 0;
-+
- vn->proc_vlan_dir = proc_net_mkdir(net, name_root, net->proc_net);
- if (!vn->proc_vlan_dir)
- goto err;
---- a/net/core/net-procfs.c
-+++ b/net/core/net-procfs.c
-@@ -279,10 +279,12 @@ static int __net_init dev_proc_net_init(
- if (!proc_create_net("dev", 0444, net->proc_net, &dev_seq_ops,
- sizeof(struct seq_net_private)))
- goto out;
-- if (!proc_create_seq("softnet_stat", 0444, net->proc_net,
-+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED) &&
-+ !proc_create_seq("softnet_stat", 0444, net->proc_net,
- &softnet_seq_ops))
- goto out_dev;
-- if (!proc_create_net("ptype", 0444, net->proc_net, &ptype_seq_ops,
-+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED) &&
-+ !proc_create_net("ptype", 0444, net->proc_net, &ptype_seq_ops,
- sizeof(struct seq_net_private)))
- goto out_softnet;
-
-@@ -292,9 +294,11 @@ static int __net_init dev_proc_net_init(
- out:
- return rc;
- out_ptype:
-- remove_proc_entry("ptype", net->proc_net);
-+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ remove_proc_entry("ptype", net->proc_net);
- out_softnet:
-- remove_proc_entry("softnet_stat", net->proc_net);
-+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ remove_proc_entry("softnet_stat", net->proc_net);
- out_dev:
- remove_proc_entry("dev", net->proc_net);
- goto out;
-@@ -304,8 +308,10 @@ static void __net_exit dev_proc_net_exit
- {
- wext_proc_exit(net);
-
-- remove_proc_entry("ptype", net->proc_net);
-- remove_proc_entry("softnet_stat", net->proc_net);
-+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED)) {
-+ remove_proc_entry("ptype", net->proc_net);
-+ remove_proc_entry("softnet_stat", net->proc_net);
-+ }
- remove_proc_entry("dev", net->proc_net);
- }
-
---- a/net/core/sock.c
-+++ b/net/core/sock.c
-@@ -3603,6 +3603,8 @@ static __net_initdata struct pernet_oper
-
- static int __init proto_init(void)
- {
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ return 0;
- return register_pernet_subsys(&proto_net_ops);
- }
-
---- a/net/ipv4/fib_trie.c
-+++ b/net/ipv4/fib_trie.c
-@@ -2844,11 +2844,13 @@ static const struct seq_operations fib_r
-
- int __net_init fib_proc_init(struct net *net)
- {
-- if (!proc_create_net("fib_trie", 0444, net->proc_net, &fib_trie_seq_ops,
-+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED) &&
-+ !proc_create_net("fib_trie", 0444, net->proc_net, &fib_trie_seq_ops,
- sizeof(struct fib_trie_iter)))
- goto out1;
-
-- if (!proc_create_net_single("fib_triestat", 0444, net->proc_net,
-+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED) &&
-+ !proc_create_net_single("fib_triestat", 0444, net->proc_net,
- fib_triestat_seq_show, NULL))
- goto out2;
-
-@@ -2859,17 +2861,21 @@ int __net_init fib_proc_init(struct net
- return 0;
-
- out3:
-- remove_proc_entry("fib_triestat", net->proc_net);
-+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ remove_proc_entry("fib_triestat", net->proc_net);
- out2:
-- remove_proc_entry("fib_trie", net->proc_net);
-+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ remove_proc_entry("fib_trie", net->proc_net);
- out1:
- return -ENOMEM;
- }
-
- void __net_exit fib_proc_exit(struct net *net)
- {
-- remove_proc_entry("fib_trie", net->proc_net);
-- remove_proc_entry("fib_triestat", net->proc_net);
-+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED)) {
-+ remove_proc_entry("fib_trie", net->proc_net);
-+ remove_proc_entry("fib_triestat", net->proc_net);
-+ }
- remove_proc_entry("route", net->proc_net);
- }
-
---- a/net/ipv4/proc.c
-+++ b/net/ipv4/proc.c
-@@ -522,5 +522,8 @@ static __net_initdata struct pernet_oper
-
- int __init ip_misc_proc_init(void)
- {
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ return 0;
-+
- return register_pernet_subsys(&ip_proc_ops);
- }
---- a/net/ipv4/route.c
-+++ b/net/ipv4/route.c
-@@ -408,6 +408,9 @@ static struct pernet_operations ip_rt_pr
-
- static int __init ip_rt_proc_init(void)
- {
-+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
-+ return 0;
-+
- return register_pernet_subsys(&ip_rt_proc_ops);
- }
-
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