target/linux/generic/patches-3.8/902-debloat_proc.patch

   1 --- a/fs/locks.c
   2 +++ b/fs/locks.c
   3 @@ -2267,6 +2267,8 @@ static const struct file_operations proc
   4
   5  static int __init proc_locks_init(void)
   6  {
   7 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED))
   8 +               return 0;
   9         proc_create("locks", 0, NULL, &proc_locks_operations);
  10         return 0;
  11  }
  12 --- a/fs/proc/Kconfig
  13 +++ b/fs/proc/Kconfig
  14 @@ -67,3 +67,8 @@ config PROC_PAGE_MONITOR
  15           /proc/pid/smaps, /proc/pid/clear_refs, /proc/pid/pagemap,
  16           /proc/kpagecount, and /proc/kpageflags. Disabling these
  17            interfaces will reduce the size of the kernel by approximately 4kb.
  18 +
  19 +config PROC_STRIPPED
  20 +       default n
  21 +       depends on EXPERT
  22 +       bool "Strip non-essential /proc functionality to reduce code size"
  23 --- a/fs/proc/consoles.c
  24 +++ b/fs/proc/consoles.c
  25 @@ -108,6 +108,9 @@ static const struct file_operations proc
  26
  27  static int __init proc_consoles_init(void)
  28  {
  29 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED))
  30 +               return 0;
  31 +
  32         proc_create("consoles", 0, NULL, &proc_consoles_operations);
  33         return 0;
  34  }
  35 --- a/fs/proc/proc_tty.c
  36 +++ b/fs/proc/proc_tty.c
  37 @@ -143,7 +143,10 @@ static const struct file_operations proc
  38  void proc_tty_register_driver(struct tty_driver *driver)
  39  {
  40         struct proc_dir_entry *ent;
  41 -
  42 +
  43 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED))
  44 +               return;
  45 +
  46         if (!driver->driver_name || driver->proc_entry ||
  47             !driver->ops->proc_fops)
  48                 return;
  49 @@ -160,6 +163,9 @@ void proc_tty_unregister_driver(struct t
  50  {
  51         struct proc_dir_entry *ent;
  52
  53 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED))
  54 +               return;
  55 +
  56         ent = driver->proc_entry;
  57         if (!ent)
  58                 return;
  59 @@ -174,6 +180,9 @@ void proc_tty_unregister_driver(struct t
  60   */
  61  void __init proc_tty_init(void)
  62  {
  63 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED))
  64 +               return;
  65 +
  66         if (!proc_mkdir("tty", NULL))
  67                 return;
  68         proc_tty_ldisc = proc_mkdir("tty/ldisc", NULL);
  69 --- a/kernel/exec_domain.c
  70 +++ b/kernel/exec_domain.c
  71 @@ -173,6 +173,8 @@ static const struct file_operations exec
  72
  73  static int __init proc_execdomains_init(void)
  74  {
  75 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED))
  76 +               return 0;
  77         proc_create("execdomains", 0, NULL, &execdomains_proc_fops);
  78         return 0;
  79  }
  80 --- a/kernel/irq/proc.c
  81 +++ b/kernel/irq/proc.c
  82 @@ -311,6 +311,9 @@ void register_irq_proc(unsigned int irq,
  83  {
  84         char name [MAX_NAMELEN];
  85
  86 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED) && !IS_ENABLED(CONFIG_SMP))
  87 +               return;
  88 +
  89         if (!root_irq_dir || (desc->irq_data.chip == &no_irq_chip) || desc->dir)
  90                 return;
  91
  92 @@ -347,6 +350,9 @@ void unregister_irq_proc(unsigned int ir
  93  {
  94         char name [MAX_NAMELEN];
  95
  96 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED) && !IS_ENABLED(CONFIG_SMP))
  97 +               return;
  98 +
  99         if (!root_irq_dir || !desc->dir)
 100                 return;
 101  #ifdef CONFIG_SMP
 102 @@ -386,6 +392,9 @@ void init_irq_proc(void)
 103         unsigned int irq;
 104         struct irq_desc *desc;
 105
 106 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED) && !IS_ENABLED(CONFIG_SMP))
 107 +               return;
 108 +
 109         /* create /proc/irq */
 110         root_irq_dir = proc_mkdir("irq", NULL);
 111         if (!root_irq_dir)
 112 --- a/kernel/time/timer_list.c
 113 +++ b/kernel/time/timer_list.c
 114 @@ -293,6 +293,8 @@ static int __init init_timer_list_procfs
 115  {
 116         struct proc_dir_entry *pe;
 117
 118 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED))
 119 +               return 0;
 120         pe = proc_create("timer_list", 0444, NULL, &timer_list_fops);
 121         if (!pe)
 122                 return -ENOMEM;
 123 --- a/mm/vmalloc.c
 124 +++ b/mm/vmalloc.c
 125 @@ -2638,6 +2638,8 @@ static const struct file_operations proc
 126
 127  static int __init proc_vmalloc_init(void)
 128  {
 129 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED))
 130 +               return 0;
 131         proc_create("vmallocinfo", S_IRUSR, NULL, &proc_vmalloc_operations);
 132         return 0;
 133  }
 134 --- a/mm/vmstat.c
 135 +++ b/mm/vmstat.c
 136 @@ -1238,10 +1238,12 @@ static int __init setup_vmstat(void)
 137                 start_cpu_timer(cpu);
 138  #endif
 139  #ifdef CONFIG_PROC_FS
 140 -       proc_create("buddyinfo", S_IRUGO, NULL, &fragmentation_file_operations);
 141 -       proc_create("pagetypeinfo", S_IRUGO, NULL, &pagetypeinfo_file_ops);
 142 +       if (!IS_ENABLED(CONFIG_PROC_STRIPPED)) {
 143 +               proc_create("buddyinfo", S_IRUGO, NULL, &fragmentation_file_operations);
 144 +               proc_create("pagetypeinfo", S_IRUGO, NULL, &pagetypeinfo_file_ops);
 145 +               proc_create("zoneinfo", S_IRUGO, NULL, &proc_zoneinfo_file_operations);
 146 +       }
 147         proc_create("vmstat", S_IRUGO, NULL, &proc_vmstat_file_operations);
 148 -       proc_create("zoneinfo", S_IRUGO, NULL, &proc_zoneinfo_file_operations);
 149  #endif
 150         return 0;
 151  }
 152 --- a/net/8021q/vlanproc.c
 153 +++ b/net/8021q/vlanproc.c
 154 @@ -127,6 +127,9 @@ void vlan_proc_cleanup(struct net *net)
 155  {
 156         struct vlan_net *vn = net_generic(net, vlan_net_id);
 157
 158 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED))
 159 +               return;
 160 +
 161         if (vn->proc_vlan_conf)
 162                 remove_proc_entry(name_conf, vn->proc_vlan_dir);
 163
 164 @@ -146,6 +149,9 @@ int __net_init vlan_proc_init(struct net
 165  {
 166         struct vlan_net *vn = net_generic(net, vlan_net_id);
 167
 168 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED))
 169 +               return 0;
 170 +
 171         vn->proc_vlan_dir = proc_net_mkdir(net, name_root, net->proc_net);
 172         if (!vn->proc_vlan_dir)
 173                 goto err;
 174 --- a/net/core/dev.c
 175 +++ b/net/core/dev.c
 176 @@ -4588,9 +4588,11 @@ static int __net_init dev_proc_net_init(
 177
 178         if (!proc_net_fops_create(net, "dev", S_IRUGO, &dev_seq_fops))
 179                 goto out;
 180 -       if (!proc_net_fops_create(net, "softnet_stat", S_IRUGO, &softnet_seq_fops))
 181 +       if (!IS_ENABLED(CONFIG_PROC_STRIPPED) &&
 182 +           !proc_net_fops_create(net, "softnet_stat", S_IRUGO, &softnet_seq_fops))
 183                 goto out_dev;
 184 -       if (!proc_net_fops_create(net, "ptype", S_IRUGO, &ptype_seq_fops))
 185 +       if (!IS_ENABLED(CONFIG_PROC_STRIPPED) &&
 186 +           !proc_net_fops_create(net, "ptype", S_IRUGO, &ptype_seq_fops))
 187                 goto out_softnet;
 188
 189         if (wext_proc_init(net))
 190 @@ -4599,9 +4601,11 @@ static int __net_init dev_proc_net_init(
 191  out:
 192         return rc;
 193  out_ptype:
 194 -       proc_net_remove(net, "ptype");
 195 +       if (!IS_ENABLED(CONFIG_PROC_STRIPPED))
 196 +               proc_net_remove(net, "ptype");
 197  out_softnet:
 198 -       proc_net_remove(net, "softnet_stat");
 199 +       if (!IS_ENABLED(CONFIG_PROC_STRIPPED))
 200 +               proc_net_remove(net, "softnet_stat");
 201  out_dev:
 202         proc_net_remove(net, "dev");
 203         goto out;
 204 @@ -4611,8 +4615,10 @@ static void __net_exit dev_proc_net_exit
 205  {
 206         wext_proc_exit(net);
 207
 208 -       proc_net_remove(net, "ptype");
 209 -       proc_net_remove(net, "softnet_stat");
 210 +       if (!IS_ENABLED(CONFIG_PROC_STRIPPED)) {
 211 +               proc_net_remove(net, "ptype");
 212 +               proc_net_remove(net, "softnet_stat");
 213 +       }
 214         proc_net_remove(net, "dev");
 215  }
 216
 217 --- a/net/core/sock.c
 218 +++ b/net/core/sock.c
 219 @@ -2837,6 +2837,8 @@ static __net_initdata struct pernet_oper
 220
 221  static int __init proto_init(void)
 222  {
 223 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED))
 224 +               return 0;
 225         return register_pernet_subsys(&proto_net_ops);
 226  }
 227
 228 --- a/net/ipv4/fib_trie.c
 229 +++ b/net/ipv4/fib_trie.c
 230 @@ -2607,10 +2607,12 @@ static const struct file_operations fib_
 231
 232  int __net_init fib_proc_init(struct net *net)
 233  {
 234 -       if (!proc_net_fops_create(net, "fib_trie", S_IRUGO, &fib_trie_fops))
 235 +       if (!IS_ENABLED(CONFIG_PROC_STRIPPED) &&
 236 +           !proc_net_fops_create(net, "fib_trie", S_IRUGO, &fib_trie_fops))
 237                 goto out1;
 238
 239 -       if (!proc_net_fops_create(net, "fib_triestat", S_IRUGO,
 240 +       if (!IS_ENABLED(CONFIG_PROC_STRIPPED) &&
 241 +           !proc_net_fops_create(net, "fib_triestat", S_IRUGO,
 242                                   &fib_triestat_fops))
 243                 goto out2;
 244
 245 @@ -2629,8 +2631,10 @@ out1:
 246
 247  void __net_exit fib_proc_exit(struct net *net)
 248  {
 249 -       proc_net_remove(net, "fib_trie");
 250 -       proc_net_remove(net, "fib_triestat");
 251 +       if (!IS_ENABLED(CONFIG_PROC_STRIPPED)) {
 252 +               proc_net_remove(net, "fib_trie");
 253 +               proc_net_remove(net, "fib_triestat");
 254 +       }
 255         proc_net_remove(net, "route");
 256  }
 257
 258 --- a/net/ipv4/ipmr.c
 259 +++ b/net/ipv4/ipmr.c
 260 @@ -71,6 +71,10 @@
 261  #define CONFIG_IP_PIMSM        1
 262  #endif
 263
 264 +#ifdef CONFIG_PROC_STRIPPED
 265 +#undef CONFIG_PROC_FS
 266 +#endif
 267 +
 268  struct mr_table {
 269         struct list_head        list;
 270  #ifdef CONFIG_NET_NS
 271 --- a/net/ipv4/proc.c
 272 +++ b/net/ipv4/proc.c
 273 @@ -502,6 +502,9 @@ static __net_initdata struct pernet_oper
 274
 275  int __init ip_misc_proc_init(void)
 276  {
 277 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED))
 278 +               return 0;
 279 +
 280         return register_pernet_subsys(&ip_proc_ops);
 281  }
 282
 283 --- a/net/ipv4/route.c
 284 +++ b/net/ipv4/route.c
 285 @@ -427,6 +427,9 @@ static struct pernet_operations ip_rt_pr
 286
 287  static int __init ip_rt_proc_init(void)
 288  {
 289 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED))
 290 +               return 0;
 291 +
 292         return register_pernet_subsys(&ip_rt_proc_ops);
 293  }
 294
 295 --- a/ipc/msg.c
 296 +++ b/ipc/msg.c
 297 @@ -135,6 +135,9 @@ void __init msg_init(void)
 298         printk(KERN_INFO "msgmni has been set to %d\n",
 299                 init_ipc_ns.msg_ctlmni);
 300
 301 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED))
 302 +               return;
 303 +
 304         ipc_init_proc_interface("sysvipc/msg",
 305                                 "       key      msqid perms      cbytes       qnum lspid lrpid   uid   gid  cuid  cgid      stime      rtime      ctime\n",
 306                                 IPC_MSG_IDS, sysvipc_msg_proc_show);
 307 --- a/ipc/sem.c
 308 +++ b/ipc/sem.c
 309 @@ -185,6 +185,8 @@ void sem_exit_ns(struct ipc_namespace *n
 310  void __init sem_init (void)
 311  {
 312         sem_init_ns(&init_ipc_ns);
 313 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED))
 314 +               return;
 315         ipc_init_proc_interface("sysvipc/sem",
 316                                 "       key      semid perms      nsems   uid   gid  cuid  cgid      otime      ctime\n",
 317                                 IPC_SEM_IDS, sysvipc_sem_proc_show);
 318 --- a/ipc/shm.c
 319 +++ b/ipc/shm.c
 320 @@ -115,6 +115,8 @@ pure_initcall(ipc_ns_init);
 321
 322  void __init shm_init (void)
 323  {
 324 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED))
 325 +               return;
 326         ipc_init_proc_interface("sysvipc/shm",
 327  #if BITS_PER_LONG <= 32
 328                                 "       key      shmid perms       size  cpid  lpid nattch   uid   gid  cuid  cgid      atime      dtime      ctime        rss       swap\n",
 329 --- a/ipc/util.c
 330 +++ b/ipc/util.c
 331 @@ -149,6 +149,9 @@ void __init ipc_init_proc_interface(cons
 332         struct proc_dir_entry *pde;
 333         struct ipc_proc_iface *iface;
 334
 335 +       if (IS_ENABLED(CONFIG_PROC_STRIPPED))
 336 +               return;
 337 +
 338         iface = kmalloc(sizeof(*iface), GFP_KERNEL);
 339         if (!iface)
 340                 return;