exportfs: Return the minimum required handle size
The exportfs encode handle function should return the minimum required handle size. This helps user to find out the handle size by passing 0 handle size in the first step and then redoing to the call again with the returned handle size value. Acked-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Al Viro
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5fe0c23788
@ -1593,8 +1593,13 @@ int reiserfs_encode_fh(struct dentry *dentry, __u32 * data, int *lenp,
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struct inode *inode = dentry->d_inode;
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int maxlen = *lenp;
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if (maxlen < 3)
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if (need_parent && (maxlen < 5)) {
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*lenp = 5;
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return 255;
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} else if (maxlen < 3) {
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*lenp = 3;
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return 255;
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}
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data[0] = inode->i_ino;
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data[1] = le32_to_cpu(INODE_PKEY(inode)->k_dir_id);
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