linux-kernel - [PATCH] Report file size for deleted files; was Re: Counters in df, du

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Date:	Mon, 13 Jul 2009 13:59:17 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Alexey Vlasov <renton@...ton.name>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	viro@...iv.linux.org.uk
Subject: [PATCH] Report file size for deleted files; was Re: Counters in
	df, du

> But you can see the file date, these are new files and by next search

I appended a patch that reports the size.

-Andi

---

VFS: Report file size for deleted files in /proc

It's useful to know how big deleted files are, in case a file system
is filled up unexpectedly and the admin wants to track down which
process is the culprit. This patch reports the file size 
in addition to (deleted) for /proc/*/fd links.

This modifies a public interface, but it's reasonable to assume
that noone relies on the particular format here.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>

---
 fs/dcache.c |   14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

Index: linux-2.6.31-rc1-ak/fs/dcache.c
===================================================================
--- linux-2.6.31-rc1-ak.orig/fs/dcache.c
+++ linux-2.6.31-rc1-ak/fs/dcache.c
@@ -1910,9 +1910,19 @@ char *__d_path(const struct path *path,
 
 	spin_lock(&vfsmount_lock);
 	prepend(&end, &buflen, "\0", 1);
-	if (d_unlinked(dentry) &&
-		(prepend(&end, &buflen, " (deleted)", 10) != 0))
+	if (d_unlinked(dentry)) {
+		char buf[40];
+		int n;
+		if (dentry->d_inode) { /* check needed? */
+			n = snprintf(buf, sizeof buf, " (deleted; size %lluK)",
+					dentry->d_inode->i_size >> 10);
+		} else {
+			strcpy(buf, " (deleted)");
+			n = 10;
+		}
+		if (prepend(&end, &buflen, buf, n) != 0)
 			goto Elong;
+	}
 
 	if (buflen < 1)
 		goto Elong;

-- 
ak@...ux.intel.com -- Speaking for myself only.
--
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