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From: Namjae Jeon <linkinjeon@gmail.com>
To: hirofumi@mail.parknet.co.jp, akpm@linux-foundation.org,
	bfields@fieldses.org, viro@zeniv.linux.org.uk
Cc: linux-kernel@vger.kernel.org, Namjae Jeon <linkinjeon@gmail.com>,
	Namjae Jeon <namjae.jeon@samsung.com>,
	Ravishankar N <ravi.n1@samsung.com>,
	Amit Sahrawat <a.sahrawat@samsung.com>
Subject: [PATCH v2 1/5] fat: allocate persistent inode numbers
Date: Wed,  5 Sep 2012 00:57:44 +0900	[thread overview]
Message-ID: <1346774264-8031-1-git-send-email-linkinjeon@gmail.com> (raw)

From: Namjae Jeon <namjae.jeon@samsung.com>

All the files on a FAT partition have an on-disk directory entry.
The location of these entries, i_pos, is unique and is constructed by the
fat_make_i_pos() function.We can use this as the inode number making it
peristent across remounts.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Ravishankar N <ravi.n1@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
---
 fs/fat/inode.c      |    5 ++++-
 fs/fat/namei_vfat.c |    2 ++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index c7531b2..0811339 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -458,7 +458,10 @@ struct inode *fat_build_inode(struct super_block *sb,
 		inode = ERR_PTR(-ENOMEM);
 		goto out;
 	}
-	inode->i_ino = iunique(sb, MSDOS_ROOT_INO);
+	if (MSDOS_SB(sb)->options.nfs)
+		inode->i_ino = i_pos;
+	else
+		inode->i_ino = iunique(sb, MSDOS_ROOT_INO);
 	inode->i_version = 1;
 	err = fat_fill_inode(inode, de);
 	if (err) {
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index e535dd7..00d58ea 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -954,6 +954,8 @@ static int vfat_rename(struct inode *old_dir, struct dentry *old_dentry,
 	new_dir->i_version++;
 
 	fat_detach(old_inode);
+	if (MSDOS_SB(sb)->options.nfs)
+		old_inode->i_ino = new_i_pos;
 	fat_attach(old_inode, new_i_pos);
 	if (IS_DIRSYNC(new_dir)) {
 		err = fat_sync_inode(old_inode);
-- 
1.7.9.5


             reply	other threads:[~2012-09-04 15:58 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-09-04 15:57 Namjae Jeon [this message]
2012-09-04 16:17 ` [PATCH v2 1/5] fat: allocate persistent inode numbers Al Viro
2012-09-05 14:08   ` Namjae Jeon
2012-09-05 14:56     ` OGAWA Hirofumi
2012-09-06  6:46       ` Namjae Jeon
2012-09-06 12:19         ` OGAWA Hirofumi
2012-09-06 13:39           ` Namjae Jeon
2012-09-07  7:01             ` Namjae Jeon
2012-09-07 12:15               ` Steven J. Magnani
2012-09-09  9:32                 ` OGAWA Hirofumi
2012-09-09 11:29                   ` OGAWA Hirofumi
2012-09-10 12:03                     ` Namjae Jeon
2012-09-10 14:00                       ` OGAWA Hirofumi
2012-09-11 12:00                         ` Namjae Jeon
2012-09-11 12:31                           ` OGAWA Hirofumi
2012-09-11 15:13                             ` Namjae Jeon
2012-09-11 15:47                               ` OGAWA Hirofumi
2012-09-12 14:12                                 ` Namjae Jeon
2012-09-12 14:32                                   ` J. Bruce Fields
2012-09-12 17:03                                     ` OGAWA Hirofumi
2012-09-12 17:11                                       ` J. Bruce Fields
2012-09-12 17:38                                         ` OGAWA Hirofumi
2012-09-12 17:45                                           ` J. Bruce Fields
2012-09-12 18:49                                             ` OGAWA Hirofumi
2012-09-13  8:11                                               ` Namjae Jeon
2012-09-13  8:33                                                 ` OGAWA Hirofumi
2012-09-13 11:20                                                   ` J. Bruce Fields
2012-09-13 12:17                                                     ` OGAWA Hirofumi
2012-09-13 14:24                                                       ` Namjae Jeon
2012-09-13 14:46                                                         ` J. Bruce Fields
2012-09-13 15:34                                                           ` OGAWA Hirofumi
2012-09-14  8:51                                                             ` Namjae Jeon
2012-09-10 12:28                   ` Steven J. Magnani

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