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| author | Coly Li <coly.li@suse.de> | 2009-01-21 00:05:39 +0800 |
|---|---|---|
| committer | Dave Kleikamp <shaggy@linux.vnet.ibm.com> | 2009-01-27 10:56:14 -0600 |
| commit | b5c816a4f177604ae708892bba074b1d534fcbee (patch) | |
| tree | 4b5aef6e9dfd4bc80db7b363b7aaa53580ea1e9a /fs/jfs | |
| parent | fec1878fe952b994125a3be7c94b1322db586f3b (diff) | |
| download | lwn-b5c816a4f177604ae708892bba074b1d534fcbee.tar.gz lwn-b5c816a4f177604ae708892bba074b1d534fcbee.zip | |
jfs: return f_fsid for statfs(2)
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@suse.de>
Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Diffstat (limited to 'fs/jfs')
| -rw-r--r-- | fs/jfs/super.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/jfs/super.c b/fs/jfs/super.c index 0dae345e481b..59e07c10319d 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> @@ -168,6 +169,9 @@ 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; |