[PATCH 11/20] fs/jfs: return f_fsid for statfs(2), v2

[Coly Li]

This patch makes jfs return f_fsid info for statfs(2). By Andreas' suggestion, this patch populates
a persistent f_fsid between boots/mounts with help of on-disk uuid record.

Signed-off-by: Coly Li <coly.li@xxxxxxx>
Cc: Dave Kleikamp <shaggy@xxxxxxxxxxxxxx>
---
 fs/jfs/super.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index b37d1f7..6ce1aac 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -29,6 +29,7 @@
 #include <linux/posix_acl.h>
 #include <linux/buffer_head.h>
 #include <linux/exportfs.h>
+#include <linux/crc32.h>
 #include <asm/uaccess.h>
 #include <linux/seq_file.h>

@@ -168,7 +169,10 @@ static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	buf->f_files = maxinodes;
 	buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
 				    atomic_read(&imap->im_numfree));
-
+	buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2);
+	buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2,
+					sizeof(sbi->uuid)/2);
+	
 	buf->f_namelen = JFS_NAME_MAX;
 	return 0;
 }

-- 
Coly Li
SuSE Labs




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