2017-10-29 18:32:10 +00:00
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From 9e3f1d0805b2d919904dd9a4ff0d956314cc3cba Mon Sep 17 00:00:00 2001
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From: Felix Fietkau <nbd@nbd.name>
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Date: Sat, 8 Jul 2017 08:20:09 +0200
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Subject: debloat: procfs
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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fs/locks.c | 2 ++
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fs/proc/Kconfig | 5 +++++
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fs/proc/consoles.c | 3 +++
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fs/proc/proc_tty.c | 11 ++++++++++-
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include/net/snmp.h | 18 +++++++++++++++++-
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ipc/msg.c | 3 +++
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ipc/sem.c | 2 ++
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ipc/shm.c | 2 ++
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ipc/util.c | 3 +++
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kernel/exec_domain.c | 2 ++
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kernel/irq/proc.c | 9 +++++++++
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kernel/time/timer_list.c | 2 ++
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mm/vmalloc.c | 2 ++
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mm/vmstat.c | 8 +++++---
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net/8021q/vlanproc.c | 6 ++++++
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net/core/net-procfs.c | 18 ++++++++++++------
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net/core/sock.c | 2 ++
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net/ipv4/fib_trie.c | 18 ++++++++++++------
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net/ipv4/proc.c | 3 +++
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net/ipv4/route.c | 3 +++
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20 files changed, 105 insertions(+), 17 deletions(-)
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--- a/fs/locks.c
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+++ b/fs/locks.c
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2018-10-04 09:26:55 +00:00
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@@ -2812,6 +2812,8 @@ static const struct file_operations proc
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2017-10-29 18:32:10 +00:00
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static int __init proc_locks_init(void)
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{
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+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
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+ return 0;
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proc_create("locks", 0, NULL, &proc_locks_operations);
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return 0;
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}
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--- a/fs/proc/Kconfig
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+++ b/fs/proc/Kconfig
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@@ -81,3 +81,8 @@ config PROC_CHILDREN
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Say Y if you are running any user-space software which takes benefit from
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this interface. For example, rkt is such a piece of software.
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+
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+config PROC_STRIPPED
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+ default n
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+ depends on EXPERT
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+ bool "Strip non-essential /proc functionality to reduce code size"
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--- a/fs/proc/consoles.c
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+++ b/fs/proc/consoles.c
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@@ -106,6 +106,9 @@ static const struct file_operations proc
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static int __init proc_consoles_init(void)
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{
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+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
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+ return 0;
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+
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proc_create("consoles", 0, NULL, &proc_consoles_operations);
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return 0;
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}
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--- a/fs/proc/proc_tty.c
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+++ b/fs/proc/proc_tty.c
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2018-01-02 21:12:28 +00:00
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@@ -145,7 +145,10 @@ static const struct file_operations proc
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2017-10-29 18:32:10 +00:00
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void proc_tty_register_driver(struct tty_driver *driver)
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{
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struct proc_dir_entry *ent;
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-
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+
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+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
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+ return;
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+
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if (!driver->driver_name || driver->proc_entry ||
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!driver->ops->proc_fops)
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return;
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2018-01-02 21:12:28 +00:00
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@@ -162,6 +165,9 @@ void proc_tty_unregister_driver(struct t
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2017-10-29 18:32:10 +00:00
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{
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struct proc_dir_entry *ent;
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+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
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+ return;
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+
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ent = driver->proc_entry;
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if (!ent)
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return;
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2018-01-02 21:12:28 +00:00
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@@ -176,6 +182,9 @@ void proc_tty_unregister_driver(struct t
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2017-10-29 18:32:10 +00:00
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*/
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void __init proc_tty_init(void)
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{
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+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
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+ return;
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+
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if (!proc_mkdir("tty", NULL))
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return;
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proc_mkdir("tty/ldisc", NULL); /* Preserved: it's userspace visible */
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--- a/include/net/snmp.h
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+++ b/include/net/snmp.h
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@@ -123,6 +123,21 @@ struct linux_xfrm_mib {
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#define DECLARE_SNMP_STAT(type, name) \
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extern __typeof__(type) __percpu *name
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+#ifdef CONFIG_PROC_STRIPPED
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+#define __SNMP_STATS_DUMMY(mib) \
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+ do { (void) mib->mibs[0]; } while(0)
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+
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+#define __SNMP_INC_STATS(mib, field) __SNMP_STATS_DUMMY(mib)
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+#define SNMP_INC_STATS_ATOMIC_LONG(mib, field) __SNMP_STATS_DUMMY(mib)
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+#define SNMP_INC_STATS(mib, field) __SNMP_STATS_DUMMY(mib)
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+#define SNMP_DEC_STATS(mib, field) __SNMP_STATS_DUMMY(mib)
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+#define __SNMP_ADD_STATS(mib, field, addend) __SNMP_STATS_DUMMY(mib)
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+#define SNMP_ADD_STATS(mib, field, addend) __SNMP_STATS_DUMMY(mib)
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+#define SNMP_UPD_PO_STATS(mib, basefield, addend) __SNMP_STATS_DUMMY(mib)
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+#define __SNMP_UPD_PO_STATS(mib, basefield, addend) __SNMP_STATS_DUMMY(mib)
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+
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+#else
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+
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#define __SNMP_INC_STATS(mib, field) \
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__this_cpu_inc(mib->mibs[field])
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@@ -153,8 +168,9 @@ struct linux_xfrm_mib {
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__this_cpu_add(ptr[basefield##OCTETS], addend); \
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} while (0)
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+#endif
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-#if BITS_PER_LONG==32
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+#if (BITS_PER_LONG==32) && !defined(CONFIG_PROC_STRIPPED)
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#define __SNMP_ADD_STATS64(mib, field, addend) \
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do { \
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--- a/ipc/msg.c
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+++ b/ipc/msg.c
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@@ -1208,6 +1208,9 @@ int __init msg_init(void)
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{
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const int err = msg_init_ns(&init_ipc_ns);
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+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
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+ return err;
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+
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ipc_init_proc_interface("sysvipc/msg",
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" key msqid perms cbytes qnum lspid lrpid uid gid cuid cgid stime rtime ctime\n",
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IPC_MSG_IDS, sysvipc_msg_proc_show);
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--- a/ipc/sem.c
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+++ b/ipc/sem.c
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@@ -207,6 +207,8 @@ int __init sem_init(void)
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{
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const int err = sem_init_ns(&init_ipc_ns);
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+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
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+ return err;
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ipc_init_proc_interface("sysvipc/sem",
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" key semid perms nsems uid gid cuid cgid otime ctime\n",
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IPC_SEM_IDS, sysvipc_sem_proc_show);
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--- a/ipc/shm.c
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+++ b/ipc/shm.c
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@@ -122,6 +122,8 @@ pure_initcall(ipc_ns_init);
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void __init shm_init(void)
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{
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+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
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+ return;
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ipc_init_proc_interface("sysvipc/shm",
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#if BITS_PER_LONG <= 32
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" key shmid perms size cpid lpid nattch uid gid cuid cgid atime dtime ctime rss swap\n",
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--- a/ipc/util.c
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+++ b/ipc/util.c
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@@ -141,6 +141,9 @@ void __init ipc_init_proc_interface(cons
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struct proc_dir_entry *pde;
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struct ipc_proc_iface *iface;
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+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
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+ return;
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+
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iface = kmalloc(sizeof(*iface), GFP_KERNEL);
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if (!iface)
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return;
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--- a/kernel/exec_domain.c
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+++ b/kernel/exec_domain.c
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@@ -42,6 +42,8 @@ static const struct file_operations exec
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static int __init proc_execdomains_init(void)
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{
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+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
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+ return 0;
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proc_create("execdomains", 0, NULL, &execdomains_proc_fops);
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return 0;
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}
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--- a/kernel/irq/proc.c
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+++ b/kernel/irq/proc.c
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@@ -396,6 +396,9 @@ void register_irq_proc(unsigned int irq,
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void __maybe_unused *irqp = (void *)(unsigned long) irq;
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char name [MAX_NAMELEN];
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+ if (IS_ENABLED(CONFIG_PROC_STRIPPED) && !IS_ENABLED(CONFIG_SMP))
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+ return;
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+
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if (!root_irq_dir || (desc->irq_data.chip == &no_irq_chip))
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return;
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@@ -449,6 +452,9 @@ void unregister_irq_proc(unsigned int ir
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{
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char name [MAX_NAMELEN];
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+ if (IS_ENABLED(CONFIG_PROC_STRIPPED) && !IS_ENABLED(CONFIG_SMP))
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+ return;
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+
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if (!root_irq_dir || !desc->dir)
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return;
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#ifdef CONFIG_SMP
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@@ -487,6 +493,9 @@ void init_irq_proc(void)
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unsigned int irq;
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struct irq_desc *desc;
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+ if (IS_ENABLED(CONFIG_PROC_STRIPPED) && !IS_ENABLED(CONFIG_SMP))
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+ return;
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+
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/* create /proc/irq */
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root_irq_dir = proc_mkdir("irq", NULL);
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if (!root_irq_dir)
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--- a/kernel/time/timer_list.c
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+++ b/kernel/time/timer_list.c
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2019-08-05 10:15:19 +00:00
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@@ -390,6 +390,8 @@ static int __init init_timer_list_procfs
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2017-10-29 18:32:10 +00:00
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{
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struct proc_dir_entry *pe;
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+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
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+ return 0;
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2018-12-23 16:16:17 +00:00
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pe = proc_create("timer_list", 0400, NULL, &timer_list_fops);
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2017-10-29 18:32:10 +00:00
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if (!pe)
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return -ENOMEM;
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--- a/mm/vmalloc.c
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+++ b/mm/vmalloc.c
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2019-08-16 11:24:56 +00:00
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@@ -2783,6 +2783,8 @@ static const struct file_operations proc
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2017-10-29 18:32:10 +00:00
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static int __init proc_vmalloc_init(void)
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{
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+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
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+ return 0;
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proc_create("vmallocinfo", S_IRUSR, NULL, &proc_vmalloc_operations);
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return 0;
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}
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--- a/mm/vmstat.c
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+++ b/mm/vmstat.c
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2019-04-29 11:01:53 +00:00
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@@ -1950,10 +1950,12 @@ void __init init_mm_internals(void)
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2017-10-29 18:32:10 +00:00
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start_shepherd_timer();
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#endif
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#ifdef CONFIG_PROC_FS
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- proc_create("buddyinfo", 0444, NULL, &buddyinfo_file_operations);
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2019-11-18 09:17:24 +00:00
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- proc_create("pagetypeinfo", 0400, NULL, &pagetypeinfo_file_operations);
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2017-10-29 18:32:10 +00:00
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+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED)) {
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+ proc_create("buddyinfo", 0444, NULL, &buddyinfo_file_operations);
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2019-11-18 09:17:24 +00:00
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+ proc_create("pagetypeinfo", 0400, NULL, &pagetypeinfo_file_operations);
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2017-10-29 18:32:10 +00:00
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+ proc_create("zoneinfo", 0444, NULL, &zoneinfo_file_operations);
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+ }
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proc_create("vmstat", 0444, NULL, &vmstat_file_operations);
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- proc_create("zoneinfo", 0444, NULL, &zoneinfo_file_operations);
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#endif
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}
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--- a/net/8021q/vlanproc.c
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+++ b/net/8021q/vlanproc.c
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@@ -127,6 +127,9 @@ void vlan_proc_cleanup(struct net *net)
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{
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struct vlan_net *vn = net_generic(net, vlan_net_id);
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+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
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+ return;
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+
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if (vn->proc_vlan_conf)
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remove_proc_entry(name_conf, vn->proc_vlan_dir);
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@@ -146,6 +149,9 @@ int __net_init vlan_proc_init(struct net
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{
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struct vlan_net *vn = net_generic(net, vlan_net_id);
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+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
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+ return 0;
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+
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vn->proc_vlan_dir = proc_net_mkdir(net, name_root, net->proc_net);
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if (!vn->proc_vlan_dir)
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goto err;
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--- a/net/core/net-procfs.c
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+++ b/net/core/net-procfs.c
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@@ -320,10 +320,12 @@ static int __net_init dev_proc_net_init(
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if (!proc_create("dev", S_IRUGO, net->proc_net, &dev_seq_fops))
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goto out;
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- if (!proc_create("softnet_stat", S_IRUGO, net->proc_net,
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+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED) &&
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+ !proc_create("softnet_stat", S_IRUGO, net->proc_net,
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&softnet_seq_fops))
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goto out_dev;
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- if (!proc_create("ptype", S_IRUGO, net->proc_net, &ptype_seq_fops))
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+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED) &&
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+ !proc_create("ptype", S_IRUGO, net->proc_net, &ptype_seq_fops))
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goto out_softnet;
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if (wext_proc_init(net))
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@@ -332,9 +334,11 @@ static int __net_init dev_proc_net_init(
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out:
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return rc;
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out_ptype:
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- remove_proc_entry("ptype", net->proc_net);
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+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED))
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+ remove_proc_entry("ptype", net->proc_net);
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out_softnet:
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- remove_proc_entry("softnet_stat", net->proc_net);
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+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED))
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+ remove_proc_entry("softnet_stat", net->proc_net);
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out_dev:
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remove_proc_entry("dev", net->proc_net);
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goto out;
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@@ -344,8 +348,10 @@ 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
|
2019-10-08 13:02:52 +00:00
|
|
|
@@ -3384,6 +3384,8 @@ static __net_initdata struct pernet_oper
|
2017-10-29 18:32:10 +00:00
|
|
|
|
|
|
|
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
|
2019-01-31 15:52:41 +00:00
|
|
|
@@ -2740,10 +2740,12 @@ static const struct file_operations fib_
|
2017-10-29 18:32:10 +00:00
|
|
|
|
|
|
|
int __net_init fib_proc_init(struct net *net)
|
|
|
|
{
|
|
|
|
- if (!proc_create("fib_trie", S_IRUGO, net->proc_net, &fib_trie_fops))
|
|
|
|
+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED) &&
|
|
|
|
+ !proc_create("fib_trie", S_IRUGO, net->proc_net, &fib_trie_fops))
|
|
|
|
goto out1;
|
|
|
|
|
|
|
|
- if (!proc_create("fib_triestat", S_IRUGO, net->proc_net,
|
|
|
|
+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED) &&
|
|
|
|
+ !proc_create("fib_triestat", S_IRUGO, net->proc_net,
|
|
|
|
&fib_triestat_fops))
|
|
|
|
goto out2;
|
|
|
|
|
2019-01-31 15:52:41 +00:00
|
|
|
@@ -2753,17 +2755,21 @@ int __net_init fib_proc_init(struct net
|
2017-10-29 18:32:10 +00:00
|
|
|
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
|
2019-06-18 10:37:27 +00:00
|
|
|
@@ -559,6 +559,9 @@ static __net_initdata struct pernet_oper
|
2017-10-29 18:32:10 +00:00
|
|
|
|
|
|
|
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
|
2018-03-09 17:33:04 +00:00
|
|
|
@@ -427,6 +427,9 @@ static struct pernet_operations ip_rt_pr
|
2017-10-29 18:32:10 +00:00
|
|
|
|
|
|
|
static int __init ip_rt_proc_init(void)
|
|
|
|
{
|
|
|
|
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
|
|
|
|
+ return 0;
|
|
|
|
+
|
|
|
|
return register_pernet_subsys(&ip_rt_proc_ops);
|
|
|
|
}
|
|
|
|
|