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Commit b5c816a4 authored by Coly Li's avatar Coly Li Committed by Dave Kleikamp
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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: default avatarColy Li <coly.li@suse.de>
Signed-off-by: default avatarDave Kleikamp <shaggy@linux.vnet.ibm.com>
parent fec1878f

fs/jfs/super.c

+4 −0
Original line number Diff line number Diff line
@@ -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;