diff options
Diffstat (limited to 'Documentation/filesystems/nfs')
| -rw-r--r-- | Documentation/filesystems/nfs/client-identifier.rst | 2 | ||||
| -rw-r--r-- | Documentation/filesystems/nfs/exporting.rst | 26 | ||||
| -rw-r--r-- | Documentation/filesystems/nfs/rpc-cache.rst | 2 | ||||
| -rw-r--r-- | Documentation/filesystems/nfs/rpc-server-gss.rst | 2 |
4 files changed, 29 insertions, 3 deletions
diff --git a/Documentation/filesystems/nfs/client-identifier.rst b/Documentation/filesystems/nfs/client-identifier.rst index a94c7a9748d7..4804441155f5 100644 --- a/Documentation/filesystems/nfs/client-identifier.rst +++ b/Documentation/filesystems/nfs/client-identifier.rst @@ -131,7 +131,7 @@ deployments, this construction is usually adequate. Often, however, the node name by itself is not adequately unique, and can change unexpectedly. Problematic situations include: - - NFS-root (diskless) clients, where the local DCHP server (or + - NFS-root (diskless) clients, where the local DHCP server (or equivalent) does not provide a unique host name. - "Containers" within a single Linux host. If each container has diff --git a/Documentation/filesystems/nfs/exporting.rst b/Documentation/filesystems/nfs/exporting.rst index 3d97b8d8f735..4b30daee399a 100644 --- a/Documentation/filesystems/nfs/exporting.rst +++ b/Documentation/filesystems/nfs/exporting.rst @@ -215,3 +215,29 @@ following flags are defined: This flag causes nfsd to close any open files for this inode _before_ calling into the vfs to do an unlink or a rename that would replace an existing file. + + EXPORT_OP_REMOTE_FS - Backing storage for this filesystem is remote + PF_LOCAL_THROTTLE exists for loopback NFSD, where a thread needs to + write to one bdi (the final bdi) in order to free up writes queued + to another bdi (the client bdi). Such threads get a private balance + of dirty pages so that dirty pages for the client bdi do not imact + the daemon writing to the final bdi. For filesystems whose durable + storage is not local (such as exported NFS filesystems), this + constraint has negative consequences. EXPORT_OP_REMOTE_FS enables + an export to disable writeback throttling. + + EXPORT_OP_NOATOMIC_ATTR - Filesystem does not update attributes atomically + EXPORT_OP_NOATOMIC_ATTR indicates that the exported filesystem + cannot provide the semantics required by the "atomic" boolean in + NFSv4's change_info4. This boolean indicates to a client whether the + returned before and after change attributes were obtained atomically + with the respect to the requested metadata operation (UNLINK, + OPEN/CREATE, MKDIR, etc). + + EXPORT_OP_FLUSH_ON_CLOSE - Filesystem flushes file data on close(2) + On most filesystems, inodes can remain under writeback after the + file is closed. NFSD relies on client activity or local flusher + threads to handle writeback. Certain filesystems, such as NFS, flush + all of an inode's dirty data on last close. Exports that behave this + way should set EXPORT_OP_FLUSH_ON_CLOSE so that NFSD knows to skip + waiting for writeback when closing such files. diff --git a/Documentation/filesystems/nfs/rpc-cache.rst b/Documentation/filesystems/nfs/rpc-cache.rst index bb164eea969b..339efd75016a 100644 --- a/Documentation/filesystems/nfs/rpc-cache.rst +++ b/Documentation/filesystems/nfs/rpc-cache.rst @@ -78,7 +78,7 @@ Creating a Cache include taking references to shared objects. void update(struct cache_head \*orig, struct cache_head \*new) - Set the 'content' fileds in 'new' from 'orig'. + Set the 'content' fields in 'new' from 'orig'. int cache_show(struct seq_file \*m, struct cache_detail \*cd, struct cache_head \*h) Optional. Used to provide a /proc file that lists the diff --git a/Documentation/filesystems/nfs/rpc-server-gss.rst b/Documentation/filesystems/nfs/rpc-server-gss.rst index ccaea9e7cea2..5c1a1c58fc27 100644 --- a/Documentation/filesystems/nfs/rpc-server-gss.rst +++ b/Documentation/filesystems/nfs/rpc-server-gss.rst @@ -29,7 +29,7 @@ The Linux kernel, at the moment, supports only the KRB5 mechanism, and depends on GSSAPI extensions that are KRB5 specific. GSSAPI is a complex library, and implementing it completely in kernel is -unwarranted. However GSSAPI operations are fundementally separable in 2 +unwarranted. However GSSAPI operations are fundamentally separable in 2 parts: - initial context establishment |