- 06 Mar, 2012 11 commits
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Trond Myklebust authored
Signed-off-by:Trond Myklebust <Trond.Myklebust@netapp.com>
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Trond Myklebust authored
Replace the union with the common struct stateid4 as defined in both RFC3530 and RFC5661. This makes it easier to access the sequence id, which will again make implementing support for parallel OPEN calls easier. Signed-off-by: -
Trond Myklebust authored
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Trond Myklebust authored
It is really a function for selecting the correct stateid to use in a read or write situation. Signed-off-by: -
Trond Myklebust authored
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Trond Myklebust authored
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Trond Myklebust authored
The current version of encode_stateid really only applies to open stateids. You can't use it for locks, delegations or layouts. Signed-off-by: -
Trond Myklebust authored
Change the name to reflect what we're really doing: testing two stateids for whether or not they match according the the rules in RFC3530 and RFC5661. Move the code from callback_proc.c to nfs4proc.c Signed-off-by: -
Trond Myklebust authored
nfs41_validate_delegation_stateid is broken if we supply a stateid with a non-zero sequence id. Instead of trying to match the sequence id, the function assumes that we always want to error. While this is true for a delegation callback, it is not true in general. Also fix a typo in nfs4_callback_recall. Reported-by:
Andy Adamson <andros@netapp.com> Signed-off-by:
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Trond Myklebust authored
If we know that the delegation stateid is bad or revoked, we need to remove that delegation as soon as possible, and then mark all the stateids that relied on that delegation for recovery. We cannot use the delegation as part of the recovery process. Also note that NFSv4.1 uses a different error code (NFS4ERR_DELEG_REVOKED) to indicate that the delegation was revoked. Finally, ensure that setlk() and setattr() can both recover safely from a revoked delegation. Signed-off-by: -
Trond Myklebust authored
The check for 'fh == NULL' needs to come _before_ we dereference fh. Reported-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
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- 05 Mar, 2012 2 commits
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Trond Myklebust authored
The attempt to display the implementation ID needs to be conditional on whether or not CONFIG_NFS_V4_1 is defined Reported-by:
Bryan Schumaker <Bryan.Schumaker@netapp.com> Signed-off-by:
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Bryan Schumaker authored
When compiled without NFS v4 configured these function won't be defined and the compiler will yell. Signed-off-by:
Bryan Schumaker <bjschuma@netapp.com> Signed-off-by:
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- 03 Mar, 2012 1 commit
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Trond Myklebust authored
Conflicts: fs/nfs/nfs4proc.c Back-merge of the upstream kernel in order to fix a conflict with the slotid type conversion and implementation id patches...
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- 02 Mar, 2012 15 commits
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Chuck Lever authored
Get rid of encode_compound: tag= when XDR debugging is enabled. The current Linux client never sets compound tags. Signed-off-by:
Chuck Lever <chuck.lever@oracle.com> Signed-off-by:
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Chuck Lever authored
The fh_expire_type file attribute is a filesystem wide attribute that consists of flags that indicate what characteristics file handles on this FSID have. Our client doesn't support volatile file handles. It should find out early (say, at mount time) whether the server is going to play shenanighans with file handles during a migration. Signed-off-by:
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Chuck Lever authored
The Linux NFS client must distinguish between referral events (which it currently supports) and migration events (which it does not yet support). In both types of events, an fs_locations array is returned. But upper layers, not the XDR layer, should make the distinction between a referral and a migration. There really isn't a way for an XDR decoder function to distinguish the two, in general. Slightly adjust the FATTR flags returned by decode_fs_locations() to set NFS_ATTR_FATTR_V4_LOCATIONS only if a non-empty locations array was returned from the server. Then have logic in nfs4proc.c distinguish whether the locations array is for a referral or something else. Signed-off-by:
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Chuck Lever authored
Clean up: pass just the clientid4 to encode_renew(). This enables it to be used by callers who might not have an full nfs_client. Signed-off-by:
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Chuck Lever authored
For debugging, introduce a simplistic function to print NFS file handles on the system console. The main function is hooked into the dprintk debugging facility, but you can directly call the helper, _nfs_display_fhandle(), if you want to print a handle unconditionally. Signed-off-by:
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Chuck Lever authored
For NFSv4 mounts, the clientaddr= mount option has always been required. Now we have rpc_localaddr() in the kernel, which was modeled after the same logic in the mount.nfs command that constructs the clientaddr= mount option. If user space doesn't provide a clientaddr= mount option, the kernel can now construct its own. Signed-off-by:
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Chuck Lever authored
NFSv4.0 clients must send endpoint information for their callback service to NFSv4.0 servers during their first contact with a server. Traditionally on Linux, user space provides the callback endpoint IP address via the "clientaddr=" mount option. During an NFSv4 migration event, it is possible that an FSID may be migrated to a destination server that is accessible via a different source IP address than the source server was. The client must update callback endpoint information on the destination server so that it can maintain leases and allow delegation. Without a new "clientaddr=" option from user space, however, the kernel itself must construct an appropriate IP address for the callback update. Provide an API in the RPC client for upper layer RPC consumers to acquire a source address for a remote. The mechanism used by the mount.nfs command is copied: set up a connected UDP socket to the designated remote, then scrape the source address off the socket. We are careful to select the correct network namespace when setting up the temporary UDP socket. Signed-off-by:
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Trond Myklebust authored
When the cl_xprt field is updated, the cl_server field will also have to change. Since the contents of cl_server follow the remote endpoint of cl_xprt, just move that field to the rpc_xprt. Signed-off-by:
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Trond Myklebust authored
A migration event will replace the rpc_xprt used by an rpc_clnt. To ensure this can be done safely, all references to cl_xprt must now use a form of rcu_dereference(). Special care is taken with rpc_peeraddr2str(), which returns a pointer to memory whose lifetime is the same as the rpc_xprt. Signed-off-by:
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Chuck Lever authored
CLOSE is new with NFSv4. Sometimes it's important to know the timing of this operation compared to things like lease renewal. Signed-off-by:
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Chuck Lever authored
I noticed recently that decode_attr_fs_locations() is not generating very pretty debugging output. The pathname components each appear on a separate line of output, though that does not appear to be the intended display behavior. The preferred way to generate continued lines of output on the console is to use pr_cont(). Note that incoming pathname4 components contain a string that is not necessarily NUL-terminated. I did actually see some trailing garbage on the console. In addition to correcting the line continuation problem, add a string precision format specifier to ensure that each component string is displayed properly, and that vsnprintf() does not Oops. Someone pointed out that allowing incoming network data to possibly generate a console line of unbounded length may not be such a good idea. Since this output will rarely be enabled, and there is a hard upper bound (NFS4_PATHNAME_MAXCOMPONENTS) in our implementation, this is probably not a major concern. It might be useful to additionally sanity-check the length of each incoming component, however. RFC 3530bis15 does not suggest a maximum number of UTF-8 characters per component for either the pathname4 or component4 types. However, we could invent one that is appropriate for our implementation. Another possibility is to scrap all of this and print these pathnames in upper layers after a reasonable amount of sanity checking in the XDR layer. This would give us an opportunity to allocate a full buffer so that the whole pathname would be output via a single dprintk. Introduced by commit 7aaa0b3b: "NFSv4: convert fs-locations-components to conform to RFC3530," (June 9, 2006). Signed-off-by:
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Chuck Lever authored
Eliminate a number of implicit type casts in comparisons, and these compiler warnings: fs/nfs/dir.c: In function ‘nfs_readdir_clear_array’: fs/nfs/dir.c:264:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] fs/nfs/dir.c: In function ‘nfs_readdir_search_for_cookie’: fs/nfs/dir.c:352:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] fs/nfs/dir.c: In function ‘nfs_do_filldir’: fs/nfs/dir.c:769:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] fs/nfs/dir.c:780:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] Signed-off-by:
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Trond Myklebust authored
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Trond Myklebust authored
The 'minorversion' mount option is now deprecated, so we need to display the minor version number in the 'vers=' format. Signed-off-by: -
Trond Myklebust authored
Allow the user to mount an NFSv4.0 or NFSv4.1 partition using a standard syntax of '-overs=4.0', or '-overs=4.1' rather than the more cumbersome '-overs=4,minorversion=1'. See also the earlier patch by Dros Adamson, which added the Linux-specific syntax '-ov4.0', '-ov4.1'. Signed-off-by:
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- 01 Mar, 2012 7 commits
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Weston Andros Adamson authored
Shows the implementation ids in /proc/self/mountstats. This doesn't break the nfs-utils mountstats tool. Signed-off-by:
Weston Andros Adamson <dros@netapp.com> Signed-off-by:
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Weston Andros Adamson authored
server_scope would never be freed if nfs4_check_cl_exchange_flags() returned non-zero Signed-off-by:
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Weston Andros Adamson authored
Send the nfs implementation id in EXCHANGE_ID requests unless the module parameter nfs.send_implementation_id is 0. This adds a CONFIG variable for the nii_domain that defaults to "kernel.org". Signed-off-by:
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Bryan Schumaker authored
This patch removes the old hashmap-based caching and instead uses a "request key actor" to place an upcall to the legacy idmapper rather than going through /sbin/request-key. This will only be used as a fallback if /etc/request-key.conf isn't configured to use nfsidmap. Signed-off-by:
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Bryan Schumaker authored
The keyctl_set_timeout function isn't exported to other parts of the kernel, but I want to use it for the NFS idmapper. I already have the key, but I wanted a generic way to set the timeout. Signed-off-by:
David Howells <dhowells@redhat.com> Signed-off-by:
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Trond Myklebust authored
The NFS4CLNT_LAYOUTRECALL bit is a long-term impediment to scalability. It basically stops all other recalls by a given server once any layout recall is requested. If the recall is for a different file, then we don't care. If the recall applies to the same file, then we're in one of two situations: Either we are in the case of a replay of an existing request, in which case the session is supposed to deal with matters, or we are dealing with a completely different request, in which case we should just try to process it. Signed-off-by: -
Trond Myklebust authored
The NFS4CLNT_LAYOUTRECALL tests in pnfs_layout_process and pnfs_update_layout are redundant. In the case of a bulk layout recall, we're always testing for the NFS_LAYOUT_BULK_RECALL flay anyway. In the case of a file or segment recall, the call to pnfs_set_layout_stateid() updates the layout_header 'barrier' sequence id, which triggers the test in pnfs_layoutgets_blocked() and is less race-prone than NFS4CLNT_LAYOUTRECALL anyway. Signed-off-by:
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- 27 Feb, 2012 4 commits
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Stanislav Kinsbursky authored
Currently, wait queue, used for polling of RPC pipe changes from user-space, is a part of RPC pipe. But the pipe data itself can be released on NFS umount prior to dentry-inode pair, connected to it (is case of this pair is open by some process). This is not a problem for almost all pipe users, because all PipeFS file operations checks pipe reference prior to using it. Except evenfd. This thing registers itself with "poll" file operation and thus has a reference to pipe wait queue. This leads to oopses on destroying eventfd after NFS umount (like rpc_idmapd do) since not pipe data left to the point already. The solution is to wait queue from pipe data to internal RPC inode data. This looks more logical, because this wiat queue used only for user-space processes, which already holds inode reference. Note: upcalls have to get pipe->dentry prior to dereferecing wait queue to make sure, that mount point won't disappear from underneath us. Signed-off-by:
Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by:
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Stanislav Kinsbursky authored
There are 2 tightly bound objects: pipe data (created for kernel needs, has reference to dentry, which depends on PipeFS mount/umount) and PipeFS dentry/inode pair (created on mount for user-space needs). They both independently may have or have not a valid reference to each other. This means, that we have to make sure, that pipe->dentry reference is valid on upcalls, and dentry->pipe reference is valid on downcalls. The latter check is absent - my fault. IOW, PipeFS dentry can be opened by some process (rpc.idmapd for example), but it's pipe data can belong to NFS mount, which was unmounted already and thus pipe data was destroyed. To fix this, pipe reference have to be set to NULL on rpc_unlink() and checked on PipeFS file operations instead of pipe->dentry check. Note: PipeFS "poll" file operation will be updated in next patch, because it's logic is more complicated. Signed-off-by:
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Stanislav Kinsbursky authored
v3: 1) Lookup for client is performed from the beginning of the list on each PipeFS event handling operation. Lockdep is sad otherwise, because inode mutex is taken on PipeFS dentry creation, which can be called on mount notification, where this per-net client lock is taken on clients list walk. Signed-off-by:
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Stanislav Kinsbursky authored
v3: 1) Lookup for client is performed from the beginning of the list on each PipeFS event handling operation. Lockdep is sad otherwise, because inode mutex is taken on PipeFS dentry creation, which can be called on mount notification, where this per-net client lock is taken on clients list walk. Signed-off-by:
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