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Diffstat (limited to 'doc/README.NFS')
| -rw-r--r-- | doc/README.NFS | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/doc/README.NFS b/doc/README.NFS index 239dcb2..edf5482 100644 --- a/doc/README.NFS +++ b/doc/README.NFS @@ -21,6 +21,17 @@ be requested on any inode, including non-directories, while the latter is only requested for directories. Otherwise these special lookups should behave identically to ordinary lookups. +Furthermore, setting FUSE_CAP_EXPORT_SUPPORT requires the file system +to handle node-ids (fuse_ino_t) that the file system may does not know +about - e.g. a fuse FORGET request might have been received or the node-id +was used in a previous instance of the file system daemon. The node-id might +not be valid at all when an invalid handle is passed to open_by_handle_at(). +This implies that the filesystem *must not* reuse node-ids even if +generation numbers are set correctly. This is because generation numbers +are not provided by the kernel to e.g. the getattr() handler, so the +handler would be unable to tell if the provided node-id refers to the +"known" current one, or a previous one that has been forgotten and re-used. + 2) high-level interface Because the high-level interface is path based, it is not possible to |