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authorMichael Kerrisk (man-pages) <mtk.manpages@gmail.com>2016-10-11 23:53:28 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-12 01:06:31 +0300
commit3734a13b96ebf039b293d8d37a934fd1bd9e03ab (patch)
treedac3b2be69a7f83d32643251efc51701acbae055 /fs/pipe.c
parentd37d41666408102bf0ac8e48d8efdce7b809e5f6 (diff)
downloadlinux-3734a13b96ebf039b293d8d37a934fd1bd9e03ab.tar.xz
pipe: refactor argument for account_pipe_buffers()
This is a preparatory patch for following work. account_pipe_buffers() performs accounting in the 'user_struct'. There is no need to pass a pointer to a 'pipe_inode_info' struct (which is then dereferenced to obtain a pointer to the 'user' field). Instead, pass a pointer directly to the 'user_struct'. This change is needed in preparation for a subsequent patch that the fixes the limit checking in alloc_pipe_info() (and the resulting code is a little more logical). Link: http://lkml.kernel.org/r/7277bf8c-a6fc-4a7d-659c-f5b145c981ab@gmail.com Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com> Reviewed-by: Vegard Nossum <vegard.nossum@oracle.com> Cc: Willy Tarreau <w@1wt.eu> Cc: <socketpair@gmail.com> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Jens Axboe <axboe@fb.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/pipe.c')
-rw-r--r--fs/pipe.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/fs/pipe.c b/fs/pipe.c
index a72b6ff9b48a..b9422bc17028 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -601,10 +601,10 @@ pipe_fasync(int fd, struct file *filp, int on)
return retval;
}
-static void account_pipe_buffers(struct pipe_inode_info *pipe,
+static void account_pipe_buffers(struct user_struct *user,
unsigned long old, unsigned long new)
{
- atomic_long_add(new - old, &pipe->user->pipe_bufs);
+ atomic_long_add(new - old, &user->pipe_bufs);
}
static bool too_many_pipe_buffers_soft(struct user_struct *user)
@@ -641,7 +641,7 @@ struct pipe_inode_info *alloc_pipe_info(void)
pipe->r_counter = pipe->w_counter = 1;
pipe->buffers = pipe_bufs;
pipe->user = user;
- account_pipe_buffers(pipe, 0, pipe_bufs);
+ account_pipe_buffers(user, 0, pipe_bufs);
mutex_init(&pipe->mutex);
return pipe;
}
@@ -656,7 +656,7 @@ void free_pipe_info(struct pipe_inode_info *pipe)
{
int i;
- account_pipe_buffers(pipe, pipe->buffers, 0);
+ account_pipe_buffers(pipe->user, pipe->buffers, 0);
free_uid(pipe->user);
for (i = 0; i < pipe->buffers; i++) {
struct pipe_buffer *buf = pipe->bufs + i;
@@ -1077,7 +1077,7 @@ static long pipe_set_size(struct pipe_inode_info *pipe, unsigned long arg)
memcpy(bufs + head, pipe->bufs, tail * sizeof(struct pipe_buffer));
}
- account_pipe_buffers(pipe, pipe->buffers, nr_pages);
+ account_pipe_buffers(pipe->user, pipe->buffers, nr_pages);
pipe->curbuf = 0;
kfree(pipe->bufs);
pipe->bufs = bufs;