[PATCH] ext3: fsid for statvfs
Update ext3_statfs to return an FSID that is a 64 bit XOR of the 128 bit filesystem UUID as suggested by Andreas Dilger. See the following Bugzilla entry for details: http://bugzilla.kernel.org/show_bug.cgi?id=136 Cc: Andreas Dilger <adilger@clusterfs.com> Cc: Stephen Tweedie <sct@redhat.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -2387,6 +2387,7 @@ static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
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struct ext3_super_block *es = sbi->s_es;
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ext3_fsblk_t overhead;
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int i;
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u64 fsid;
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if (test_opt (sb, MINIX_DF))
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overhead = 0;
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@ -2433,6 +2434,10 @@ static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
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buf->f_files = le32_to_cpu(es->s_inodes_count);
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buf->f_ffree = percpu_counter_sum(&sbi->s_freeinodes_counter);
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buf->f_namelen = EXT3_NAME_LEN;
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fsid = le64_to_cpup((void *)es->s_uuid) ^
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le64_to_cpup((void *)es->s_uuid + sizeof(u64));
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buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL;
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buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL;
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return 0;
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}
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