diff --git a/include/linux/pid.h b/include/linux/pid.h index d08c587342ee..7d1bc7c13369 100644 --- a/include/linux/pid.h +++ b/include/linux/pid.h @@ -75,6 +75,7 @@ extern const struct file_operations pidfd_fops; struct file; extern struct pid *pidfd_pid(const struct file *file); +struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags); static inline struct pid *get_pid(struct pid *pid) { diff --git a/kernel/exit.c b/kernel/exit.c index 659a40f6ea7d..53046b96881a 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -1572,25 +1572,6 @@ end: return retval; } -static struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags) -{ - struct fd f; - struct pid *pid; - - f = fdget(fd); - if (!f.file) - return ERR_PTR(-EBADF); - - pid = pidfd_pid(f.file); - if (!IS_ERR(pid)) { - get_pid(pid); - *flags = f.file->f_flags; - } - - fdput(f); - return pid; -} - static long kernel_waitid(int which, pid_t upid, struct waitid_info *infop, int options, struct rusage *ru) { diff --git a/kernel/pid.c b/kernel/pid.c index 7ddca2326566..0bdcead8aae0 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -1,4 +1,4 @@ -/* +/*/ * Generic pidhash and scalable, time-bounded PID allocator * * (C) 2002-2003 Nadia Yvette Chambers, IBM @@ -42,6 +42,7 @@ #include #include #include +#include struct pid init_struct_pid = { .count = REFCOUNT_INIT(1), @@ -454,6 +455,25 @@ struct pid *find_ge_pid(int nr, struct pid_namespace *ns) return idr_get_next(&ns->idr, &nr); } +struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags) +{ + struct fd f; + struct pid *pid; + + f = fdget(fd); + if (!f.file) + return ERR_PTR(-EBADF); + + pid = pidfd_pid(f.file); + if (!IS_ERR(pid)) { + get_pid(pid); + *flags = f.file->f_flags; + } + + fdput(f); + return pid; +} + /** * pidfd_create() - Create a new pid file descriptor. *