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authorPaul Menage <menage@google.com>2007-10-18 23:39:33 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-19 11:53:36 -0700
commit355e0c48b757b7fcc79ccb98fda8105ed37a1598 (patch)
treef9687961979a808e46620f4bdf9af05de2fd68e2 /include
parentbbcb81d09104f0d440974b994c1fc508ccbe9503 (diff)
Add cgroup write_uint() helper method
Add write_uint() helper method for cgroup subsystems This helper is analagous to the read_uint() helper method for reporting u64 values to userspace. It's designed to reduce the amount of boilerplate requierd for creating new cgroup subsystems. Signed-off-by: Paul Menage <menage@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/cgroup.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index e2dd44f68f97..e95143c884b2 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -125,6 +125,14 @@ struct cftype {
ssize_t (*write) (struct cgroup *cont, struct cftype *cft,
struct file *file,
const char __user *buf, size_t nbytes, loff_t *ppos);
+
+ /*
+ * write_uint() is a shortcut for the common case of accepting
+ * a single integer (as parsed by simple_strtoull) from
+ * userspace. Use in place of write(); return 0 or error.
+ */
+ int (*write_uint) (struct cgroup *cont, struct cftype *cft, u64 val);
+
int (*release) (struct inode *inode, struct file *file);
};