linux-kernel - [PATCH 03/14] resource limits: track highwater mark of file sizes

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Message-Id: <1468578983-28229-4-git-send-email-toiwoton@gmail.com>
Date:	Fri, 15 Jul 2016 13:35:50 +0300
From:	Topi Miettinen <toiwoton@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Topi Miettinen <toiwoton@...il.com>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	linux-fsdevel@...r.kernel.org (open list:FILESYSTEMS (VFS and
	infrastructure))
Subject: [PATCH 03/14] resource limits: track highwater mark of file sizes

Track maximum size of files created, to be able to configure
RLIMIT_FSIZE resource limits. The information is available
with taskstats and cgroupstats netlink socket.

Signed-off-by: Topi Miettinen <toiwoton@...il.com>
---
 fs/attr.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/attr.c b/fs/attr.c
index 25b24d0..546f4f9 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -116,6 +116,8 @@ int inode_newsize_ok(const struct inode *inode, loff_t offset)
 			return -ETXTBSY;
 	}
 
+	update_resource_highwatermark(RLIMIT_FSIZE, offset);
+
 	return 0;
 out_sig:
 	send_sig(SIGXFSZ, current, 0);
-- 
2.8.1