> How can I get a full pathname from an inode number ? (Our data
> structure only keep track inode number instead of pathname in
> order to keep thin, so don't have any information but inode
> number.)
Except in extreme circumstances (there's some horrible kludgery in the
NFS code), you don't. Just store a dentry pointer to begin with; it's
easy to map from dentry to inode.
In addition to files with multiple names, you can have files with no
names, made by the usual Unix trick of deleting a file after opening it.
The NFS kludgery is required by the short-sighted design of the NFS
protocol. Don't emulate it, or you will be lynched by a mob of angry
kernel developers with torches and pitchforks.
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