linux-kernel - [RFC 5/5] tmpfs, support pathconf(3) with _PC_LINK

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Message-Id: <1260086343-8406-6-git-send-email-hooanon05@yahoo.co.jp>
Date:	Sun,  6 Dec 2009 16:59:03 +0900
From:	"J. R. Okajima" <hooanon05@...oo.co.jp>
To:	linux-kernel@...r.kernel.org
Cc:	stewb@...ux-foundation.org, "J. R. Okajima" <hooanon05@...oo.co.jp>
Subject: [RFC 5/5] tmpfs, support pathconf(3) with _PC_LINK_MAX

Return the value via struct statfs.f_spare[0].
Actually tmpfs doesn't check the link count in link(2) and it can be
wrap around. Set LINK_MAX_UNLIMITED.

Signed-off-by: J. R. Okajima <hooanon05@...oo.co.jp>
---
 mm/shmem.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index 356dd99..78f7e21 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1784,6 +1784,7 @@ static int shmem_statfs(struct dentry *dentry, struct kstatfs *buf)
 	buf->f_type = TMPFS_MAGIC;
 	buf->f_bsize = PAGE_CACHE_SIZE;
 	buf->f_namelen = NAME_MAX;
+	buf->f_linkmax = LINK_MAX_UNLIMITED;
 	spin_lock(&sbinfo->stat_lock);
 	if (sbinfo->max_blocks) {
 		buf->f_blocks = sbinfo->max_blocks;
-- 
1.6.1.284.g5dc13

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