[XFS] keep i_nlink updated and use proper accessors
To get the read-only bind mounts in -mm to work correctly with XFS we need to call the drop_nlink and inc_nlink helpers to monitor the link count. Add calls to these to xfs_bumplink and xfs_droplink and stop copying over di_nlink to i_nlink in xfs_validate_fields and vn_revalidate. SGI-PV: 971186 SGI-Modid: xfs-linux-melb:xfs-kern:30392a Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
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@ -201,7 +201,6 @@ xfs_validate_fields(
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struct xfs_inode *ip = XFS_I(inode);
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loff_t size;
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inode->i_nlink = ip->i_d.di_nlink;
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/* we're under i_sem so i_size can't change under us */
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size = XFS_ISIZE(ip);
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if (i_size_read(inode) != size)
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@ -103,7 +103,6 @@ vn_revalidate(
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xfs_ilock(ip, XFS_ILOCK_SHARED);
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inode->i_mode = ip->i_d.di_mode;
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inode->i_nlink = ip->i_d.di_nlink;
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inode->i_uid = ip->i_d.di_uid;
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inode->i_gid = ip->i_d.di_gid;
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inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
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@ -302,6 +302,7 @@ xfs_droplink(
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ASSERT (ip->i_d.di_nlink > 0);
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ip->i_d.di_nlink--;
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drop_nlink(ip->i_vnode);
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xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
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error = 0;
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@ -365,6 +366,7 @@ xfs_bumplink(
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ASSERT(ip->i_d.di_nlink > 0);
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ip->i_d.di_nlink++;
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inc_nlink(ip->i_vnode);
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if ((ip->i_d.di_version == XFS_DINODE_VERSION_1) &&
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(ip->i_d.di_nlink > XFS_MAXLINK_1)) {
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/*
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