This patch makes reiserfs3 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.
Randy Dunlap reported a compiling error from v2 patch like:
fs/built-in.o: In function `reiserfs_statfs':
super.c:(.text+0x7332b): undefined reference to `crc32_le'
super.c:(.text+0x7333f): undefined reference to `crc32_le'
Also he provided helpful solution to fix this error. The modification of v3
patch is based on Randy's suggestion, add 'select CRC32' in fs/reiserfs/Kconfig.
Signed-off-by: Coly Li <[email protected]>
Cc: Randy Dunlap <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: [email protected]
---
fs/reiserfs/Kconfig | 1 +
fs/reiserfs/super.c | 5 +++++
2 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/fs/reiserfs/Kconfig b/fs/reiserfs/Kconfig
index 949b8c6..513f431 100644
--- a/fs/reiserfs/Kconfig
+++ b/fs/reiserfs/Kconfig
@@ -1,5 +1,6 @@
config REISERFS_FS
tristate "Reiserfs support"
+ select CRC32
help
Stores not just filenames but the files themselves in a balanced
tree. Uses journalling.
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index f3c820b..cb8e7ee 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -27,6 +27,7 @@
#include <linux/mnt_namespace.h>
#include <linux/mount.h>
#include <linux/namei.h>
+#include <linux/crc32.h>
struct file_system_type reiserfs_fs_type;
@@ -1892,6 +1893,10 @@ static int reiserfs_statfs(struct dentry *dentry, struct
kstatfs *buf)
buf->f_bsize = dentry->d_sb->s_blocksize;
/* changed to accommodate gcc folks. */
buf->f_type = REISERFS_SUPER_MAGIC;
+ buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
+ buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
+ sizeof(rs->s_uuid)/2);
+
return 0;
}
--
Coly Li
SuSE Labs