summaryrefslogtreecommitdiff
path: root/fs/pipe.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/pipe.c')
-rw-r--r--fs/pipe.c41
1 files changed, 18 insertions, 23 deletions
diff --git a/fs/pipe.c b/fs/pipe.c
index 8773ecaa44b5..a72b6ff9b48a 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -1023,9 +1023,24 @@ static inline unsigned int round_pipe_size(unsigned int size)
* Allocate a new array of pipe buffers and copy the info over. Returns the
* pipe size if successful, or return -ERROR on error.
*/
-static long pipe_set_size(struct pipe_inode_info *pipe, unsigned long nr_pages)
+static long pipe_set_size(struct pipe_inode_info *pipe, unsigned long arg)
{
struct pipe_buffer *bufs;
+ unsigned int size, nr_pages;
+
+ size = round_pipe_size(arg);
+ nr_pages = size >> PAGE_SHIFT;
+
+ if (!nr_pages)
+ return -EINVAL;
+
+ if (!capable(CAP_SYS_RESOURCE) && size > pipe_max_size)
+ return -EPERM;
+
+ if ((too_many_pipe_buffers_hard(pipe->user) ||
+ too_many_pipe_buffers_soft(pipe->user)) &&
+ !capable(CAP_SYS_RESOURCE) && !capable(CAP_SYS_ADMIN))
+ return -EPERM;
/*
* We can shrink the pipe, if arg >= pipe->nrbufs. Since we don't
@@ -1109,28 +1124,9 @@ long pipe_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
__pipe_lock(pipe);
switch (cmd) {
- case F_SETPIPE_SZ: {
- unsigned int size, nr_pages;
-
- size = round_pipe_size(arg);
- nr_pages = size >> PAGE_SHIFT;
-
- ret = -EINVAL;
- if (!nr_pages)
- goto out;
-
- if (!capable(CAP_SYS_RESOURCE) && size > pipe_max_size) {
- ret = -EPERM;
- goto out;
- } else if ((too_many_pipe_buffers_hard(pipe->user) ||
- too_many_pipe_buffers_soft(pipe->user)) &&
- !capable(CAP_SYS_RESOURCE) && !capable(CAP_SYS_ADMIN)) {
- ret = -EPERM;
- goto out;
- }
- ret = pipe_set_size(pipe, nr_pages);
+ case F_SETPIPE_SZ:
+ ret = pipe_set_size(pipe, arg);
break;
- }
case F_GETPIPE_SZ:
ret = pipe->buffers * PAGE_SIZE;
break;
@@ -1139,7 +1135,6 @@ long pipe_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
break;
}
-out:
__pipe_unlock(pipe);
return ret;
}