LCOV - code coverage report
Current view: top level - include/linux/sched - user.h (source / functions) Hit Total Coverage
Test: combined.info Lines: 3 3 100.0 %
Date: 2022-04-01 14:35:51 Functions: 0 0 -
Branches: 2 2 100.0 %

           Branch data     Line data    Source code
       1                 :            : /* SPDX-License-Identifier: GPL-2.0 */
       2                 :            : #ifndef _LINUX_SCHED_USER_H
       3                 :            : #define _LINUX_SCHED_USER_H
       4                 :            : 
       5                 :            : #include <linux/uidgid.h>
       6                 :            : #include <linux/atomic.h>
       7                 :            : #include <linux/refcount.h>
       8                 :            : #include <linux/ratelimit.h>
       9                 :            : 
      10                 :            : /*
      11                 :            :  * Some day this will be a full-fledged user tracking system..
      12                 :            :  */
      13                 :            : struct user_struct {
      14                 :            :         refcount_t __count;     /* reference count */
      15                 :            :         atomic_t processes;     /* How many processes does this user have? */
      16                 :            :         atomic_t sigpending;    /* How many pending signals does this user have? */
      17                 :            : #ifdef CONFIG_FANOTIFY
      18                 :            :         atomic_t fanotify_listeners;
      19                 :            : #endif
      20                 :            : #ifdef CONFIG_EPOLL
      21                 :            :         atomic_long_t epoll_watches; /* The number of file descriptors currently watched */
      22                 :            : #endif
      23                 :            : #ifdef CONFIG_POSIX_MQUEUE
      24                 :            :         /* protected by mq_lock */
      25                 :            :         unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */
      26                 :            : #endif
      27                 :            :         unsigned long locked_shm; /* How many pages of mlocked shm ? */
      28                 :            :         unsigned long unix_inflight;    /* How many files in flight in unix sockets */
      29                 :            :         atomic_long_t pipe_bufs;  /* how many pages are allocated in pipe buffers */
      30                 :            : 
      31                 :            :         /* Hash table maintenance information */
      32                 :            :         struct hlist_node uidhash_node;
      33                 :            :         kuid_t uid;
      34                 :            : 
      35                 :            : #if defined(CONFIG_PERF_EVENTS) || defined(CONFIG_BPF_SYSCALL) || \
      36                 :            :     defined(CONFIG_NET) || defined(CONFIG_IO_URING)
      37                 :            :         atomic_long_t locked_vm;
      38                 :            : #endif
      39                 :            : 
      40                 :            :         /* Miscellaneous per-user rate limit */
      41                 :            :         struct ratelimit_state ratelimit;
      42                 :            : };
      43                 :            : 
      44                 :            : extern int uids_sysfs_init(void);
      45                 :            : 
      46                 :            : extern struct user_struct *find_user(kuid_t);
      47                 :            : 
      48                 :            : extern struct user_struct root_user;
      49                 :            : #define INIT_USER (&root_user)
      50                 :            : 
      51                 :            : 
      52                 :            : /* per-UID process charging. */
      53                 :            : extern struct user_struct * alloc_uid(kuid_t);
      54                 :     112905 : static inline struct user_struct *get_uid(struct user_struct *u)
      55                 :            : {
      56                 :     112905 :         refcount_inc(&u->__count);
      57         [ +  + ]:     112905 :         return u;
      58                 :            : }
      59                 :            : extern void free_uid(struct user_struct *);
      60                 :            : 
      61                 :            : #endif /* _LINUX_SCHED_USER_H */

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