pipe: limit the per-user amount of pages allocated in pipes

[karo-tx-linux.git] / include / linux / sched.h

diff --git a/include/linux/sched.h b/include/linux/sched.h
index edad7a43edea141b3ada89f7f12edac2add7b68e..1c0193baea2a57a53ed41a650df3717f4a0148ba 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -830,6 +830,8 @@ struct user_struct {
        unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */
 #endif
        unsigned long locked_shm; /* How many pages of mlocked shm ? */
+       unsigned long unix_inflight;    /* How many files in flight in unix sockets */
+       atomic_long_t pipe_bufs;  /* how many pages are allocated in pipe buffers */
 
 #ifdef CONFIG_KEYS
        struct key *uid_keyring;        /* UID specific keyring */
@@ -1455,14 +1457,15 @@ struct task_struct {
        /* Used for emulating ABI behavior of previous Linux versions */
        unsigned int personality;
 
-       unsigned in_execve:1;   /* Tell the LSMs that the process is doing an
-                                * execve */
-       unsigned in_iowait:1;
-
-       /* Revert to default priority/policy when forking */
+       /* scheduler bits, serialized by scheduler locks */
        unsigned sched_reset_on_fork:1;
        unsigned sched_contributes_to_load:1;
        unsigned sched_migrated:1;
+       unsigned :0; /* force alignment to the next boundary */
+
+       /* unserialized, strictly 'current' */
+       unsigned in_execve:1; /* bit to tell LSMs we're in execve */
+       unsigned in_iowait:1;
 #ifdef CONFIG_MEMCG
        unsigned memcg_may_oom:1;
 #endif
@@ -2002,7 +2005,8 @@ static inline int pid_alive(const struct task_struct *p)
 }
 
 /**
- * is_global_init - check if a task structure is init
+ * is_global_init - check if a task structure is init. Since init
+ * is free to have sub-threads we need to check tgid.
  * @tsk: Task structure to be checked.
  *
  * Check if a task structure is the first user space task the kernel created.
@@ -2011,7 +2015,7 @@ static inline int pid_alive(const struct task_struct *p)
  */
 static inline int is_global_init(struct task_struct *tsk)
 {
-       return tsk->pid == 1;
+       return task_tgid_nr(tsk) == 1;
 }
 
 extern struct pid *cad_pid;