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authorMinchan Kim <[email protected]>2020-10-17 16:14:54 -0700
committerLinus Torvalds <[email protected]>2020-10-18 09:27:10 -0700
commit1aa92cd31c1c032ddfed27e79d646bbb429e9b52 (patch)
treeb11b14e628cdf1a879a1fdebf7a5cff5407c2c32
parent0726b01e70455f9900ab524117c7b520d197dc8c (diff)
pid: move pidfd_get_pid() to pid.c
process_madvise syscall needs pidfd_get_pid function to translate pidfd to pid so this patch move the function to kernel/pid.c. Suggested-by: Alexander Duyck <[email protected]> Signed-off-by: Minchan Kim <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Reviewed-by: Suren Baghdasaryan <[email protected]> Reviewed-by: Alexander Duyck <[email protected]> Reviewed-by: Vlastimil Babka <[email protected]> Acked-by: Christian Brauner <[email protected]> Acked-by: David Rientjes <[email protected]> Cc: Jens Axboe <[email protected]> Cc: Jann Horn <[email protected]> Cc: Brian Geffon <[email protected]> Cc: Daniel Colascione <[email protected]> Cc: Joel Fernandes <[email protected]> Cc: Johannes Weiner <[email protected]> Cc: John Dias <[email protected]> Cc: Kirill Tkhai <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Oleksandr Natalenko <[email protected]> Cc: Sandeep Patil <[email protected]> Cc: SeongJae Park <[email protected]> Cc: SeongJae Park <[email protected]> Cc: Shakeel Butt <[email protected]> Cc: Sonny Rao <[email protected]> Cc: Tim Murray <[email protected]> Cc: Christian Brauner <[email protected]> Cc: Florian Weimer <[email protected]> Cc: <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Link: http://lkml.kernel.org/r/[email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Linus Torvalds <[email protected]>
-rw-r--r--include/linux/pid.h1
-rw-r--r--kernel/exit.c19
-rw-r--r--kernel/pid.c19
3 files changed, 20 insertions, 19 deletions
diff --git a/include/linux/pid.h b/include/linux/pid.h
index 176d6cf80e7c..fa10acb8d6a4 100644
--- a/include/linux/pid.h
+++ b/include/linux/pid.h
@@ -77,6 +77,7 @@ 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 1f51c27bae59..87a2d515de0d 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1474,25 +1474,6 @@ 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 74ddbff1a6ba..a96bc4bf4f86 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -520,6 +520,25 @@ 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.
*