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2013-04-29Merge branch 'nfs-for-next' of git://linux-nfs.org/~trondmy/nfs-2.6 into ↵J. Bruce Fields
for-3.10 Note conflict: Chuck's patches modified (and made static) gss_mech_get_by_OID, which is still needed by gss-proxy patches. The conflict resolution is a bit minimal; we may want some more cleanup.
2013-04-26SUNRPC: conditionally return endtime from import_sec_contextSimo Sorce
We expose this parameter for a future caller. It will be used to extract the endtime from the gss-proxy upcall mechanism, in order to set the rsc cache expiration time. Signed-off-by: Simo Sorce <simo@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-04-26SUNRPC: allow disabling idle timeoutJ. Bruce Fields
In the gss-proxy case we don't want to have to reconnect at random--we want to connect only on gss-proxy startup when we can steal gss-proxy's context to do the connect in the right namespace. So, provide a flag that allows the rpc_create caller to turn off the idle timeout. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-04-26Merge Trond's nfs-for-nextJ. Bruce Fields
Merging Trond's nfs-for-next branch, mainly to get b7993cebb841b0da7a33e9d5ce301a9fd3209165 "SUNRPC: Allow rpc_create() to request that TCP slots be unlimited", which a small piece of the gss-proxy work depends on.
2013-04-23Merge branch 'rpcsec_gss-from_cel' into linux-nextTrond Myklebust
* rpcsec_gss-from_cel: (21 commits) NFS: Retry SETCLIENTID with AUTH_SYS instead of AUTH_NONE NFSv4: Don't clear the machine cred when client establish returns EACCES NFSv4: Fix issues in nfs4_discover_server_trunking NFSv4: Fix the fallback to AUTH_NULL if krb5i is not available NFS: Use server-recommended security flavor by default (NFSv3) SUNRPC: Don't recognize RPC_AUTH_MAXFLAVOR NFS: Use "krb5i" to establish NFSv4 state whenever possible NFS: Try AUTH_UNIX when PUTROOTFH gets NFS4ERR_WRONGSEC NFS: Use static list of security flavors during root FH lookup recovery NFS: Avoid PUTROOTFH when managing leases NFS: Clean up nfs4_proc_get_rootfh NFS: Handle missing rpc.gssd when looking up root FH SUNRPC: Remove EXPORT_SYMBOL_GPL() from GSS mech switch SUNRPC: Make gss_mech_get() static SUNRPC: Refactor nfsd4_do_encode_secinfo() SUNRPC: Consider qop when looking up pseudoflavors SUNRPC: Load GSS kernel module by OID SUNRPC: Introduce rpcauth_get_pseudoflavor() SUNRPC: Define rpcsec_gss_info structure NFS: Remove unneeded forward declaration ...
2013-04-14SUNRPC: Allow rpc_create() to request that TCP slots be unlimitedTrond Myklebust
This is mainly for use by NFSv4.1, where the session negotiation ultimately wants to decide how many RPC slots we can fill. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-04-14SUNRPC: Fix a livelock problem in the xprt->backlog queueTrond Myklebust
This patch ensures that we throttle new RPC requests if there are requests already waiting in the xprt->backlog queue. The reason for doing this is to fix livelock issues that can occur when an existing (high priority) task is waiting in the backlog queue, gets woken up by xprt_free_slot(), but a new task then steals the slot. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-04-09nfsd4: check backchannel attributes on create_sessionJ. Bruce Fields
Make sure the client gives us an adequate backchannel. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-03-29SUNRPC: Make gss_mech_get() staticChuck Lever
gss_mech_get() is no longer used outside of gss_mech_switch.c. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-03-29SUNRPC: Refactor nfsd4_do_encode_secinfo()Chuck Lever
Clean up. This matches a similar API for the client side, and keeps ULP fingers out the of the GSS mech switch. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Acked-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-03-29SUNRPC: Consider qop when looking up pseudoflavorsChuck Lever
The NFSv4 SECINFO operation returns a list of security flavors that the server supports for a particular share. An NFSv4 client is supposed to pick a pseudoflavor it supports that corresponds to one of the flavors returned by the server. GSS flavors in this list have a GSS tuple that identify a specific GSS pseudoflavor. Currently our client ignores the GSS tuple's "qop" value. A matching pseudoflavor is chosen based only on the OID and service value. So far this omission has not had much effect on Linux. The NFSv4 protocol currently supports only one qop value: GSS_C_QOP_DEFAULT, also known as zero. However, if an NFSv4 server happens to return something other than zero in the qop field, our client won't notice. This could cause the client to behave in incorrect ways that could have security implications. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-03-29SUNRPC: Introduce rpcauth_get_pseudoflavor()Chuck Lever
A SECINFO reply may contain flavors whose kernel module is not yet loaded by the client's kernel. A new RPC client API, called rpcauth_get_pseudoflavor(), is introduced to do proper checking for support of a security flavor. When this API is invoked, the RPC client now tries to load the module for each flavor first before performing the "is this supported?" check. This means if a module is available on the client, but has not been loaded yet, it will be loaded and registered automatically when the SECINFO reply is processed. The new API can take a full GSS tuple (OID, QoP, and service). Previously only the OID and service were considered. nfs_find_best_sec() is updated to verify all flavors requested in a SECINFO reply, including AUTH_NULL and AUTH_UNIX. Previously these two flavors were simply assumed to be supported without consulting the RPC client. Note that the replaced version of nfs_find_best_sec() can return RPC_AUTH_MAXFLAVOR if the server returns a recognized OID but an unsupported "service" value. nfs_find_best_sec() now returns RPC_AUTH_UNIX in this case. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-03-29SUNRPC: Define rpcsec_gss_info structureChuck Lever
The NFSv4 SECINFO procedure returns a list of security flavors. Any GSS flavor also has a GSS tuple containing an OID, a quality-of- protection value, and a service value, which specifies a particular GSS pseudoflavor. For simplicity and efficiency, I'd like to return each GSS tuple from the NFSv4 SECINFO XDR decoder and pass it straight into the RPC client. Define a data structure that is visible to both the NFS client and the RPC client. Take structure and field names from the relevant standards to avoid confusion. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-03-02Merge tag 'nfs-for-3.9-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds
Pull NFS client bugfixes from Trond Myklebust: "We've just concluded another Connectathon interoperability testing week, and so here are the fixes for the bugs that were discovered: - Don't allow NFS silly-renamed files to be deleted - Don't start the retransmission timer when out of socket space - Fix a couple of pnfs-related Oopses. - Fix one more NFSv4 state recovery deadlock - Don't loop forever when LAYOUTGET returns NFS4ERR_LAYOUTTRYLATER" * tag 'nfs-for-3.9-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: SUNRPC: One line comment fix NFSv4.1: LAYOUTGET EDELAY loops timeout to the MDS SUNRPC: add call to get configured timeout PNFS: set the default DS timeout to 60 seconds NFSv4: Fix another open/open_recovery deadlock nfs: don't allow nfs_find_actor to match inodes of the wrong type NFSv4.1: Hold reference to layout hdr in layoutget pnfs: fix resend_to_mds for directio SUNRPC: Don't start the retransmission timer when out of socket space NFS: Don't allow NFS silly-renamed files to be deleted, no signal
2013-02-28Merge branch 'for-3.9' of git://linux-nfs.org/~bfields/linuxLinus Torvalds
Pull nfsd changes from J Bruce Fields: "Miscellaneous bugfixes, plus: - An overhaul of the DRC cache by Jeff Layton. The main effect is just to make it larger. This decreases the chances of intermittent errors especially in the UDP case. But we'll need to watch for any reports of performance regressions. - Containerized nfsd: with some limitations, we now support per-container nfs-service, thanks to extensive work from Stanislav Kinsbursky over the last year." Some notes about conflicts, since there were *two* non-data semantic conflicts here: - idr_remove_all() had been added by a memory leak fix, but has since become deprecated since idr_destroy() does it for us now. - xs_local_connect() had been added by this branch to make AF_LOCAL connections be synchronous, but in the meantime Trond had changed the calling convention in order to avoid a RCU dereference. There were a couple of more obvious actual source-level conflicts due to the hlist traversal changes and one just due to code changes next to each other, but those were trivial. * 'for-3.9' of git://linux-nfs.org/~bfields/linux: (49 commits) SUNRPC: make AF_LOCAL connect synchronous nfsd: fix compiler warning about ambiguous types in nfsd_cache_csum svcrpc: fix rpc server shutdown races svcrpc: make svc_age_temp_xprts enqueue under sv_lock lockd: nlmclnt_reclaim(): avoid stack overflow nfsd: enable NFSv4 state in containers nfsd: disable usermode helper client tracker in container nfsd: use proper net while reading "exports" file nfsd: containerize NFSd filesystem nfsd: fix comments on nfsd_cache_lookup SUNRPC: move cache_detail->cache_request callback call to cache_read() SUNRPC: remove "cache_request" argument in sunrpc_cache_pipe_upcall() function SUNRPC: rework cache upcall logic SUNRPC: introduce cache_detail->cache_request callback NFS: simplify and clean cache library NFS: use SUNRPC cache creation and destruction helper for DNS cache nfsd4: free_stid can be static nfsd: keep a checksum of the first 256 bytes of request sunrpc: trim off trailing checksum before returning decrypted or integrity authenticated buffer sunrpc: fix comment in struct xdr_buf definition ...
2013-02-28SUNRPC: add call to get configured timeoutWeston Andros Adamson
Returns the configured timeout for the xprt of the rpc client. Signed-off-by: Weston Andros Adamson <dros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-02-25Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace Pull user namespace and namespace infrastructure changes from Eric W Biederman: "This set of changes starts with a few small enhnacements to the user namespace. reboot support, allowing more arbitrary mappings, and support for mounting devpts, ramfs, tmpfs, and mqueuefs as just the user namespace root. I do my best to document that if you care about limiting your unprivileged users that when you have the user namespace support enabled you will need to enable memory control groups. There is a minor bug fix to prevent overflowing the stack if someone creates way too many user namespaces. The bulk of the changes are a continuation of the kuid/kgid push down work through the filesystems. These changes make using uids and gids typesafe which ensures that these filesystems are safe to use when multiple user namespaces are in use. The filesystems converted for 3.9 are ceph, 9p, afs, ocfs2, gfs2, ncpfs, nfs, nfsd, and cifs. The changes for these filesystems were a little more involved so I split the changes into smaller hopefully obviously correct changes. XFS is the only filesystem that remains. I was hoping I could get that in this release so that user namespace support would be enabled with an allyesconfig or an allmodconfig but it looks like the xfs changes need another couple of days before it they are ready." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (93 commits) cifs: Enable building with user namespaces enabled. cifs: Convert struct cifs_ses to use a kuid_t and a kgid_t cifs: Convert struct cifs_sb_info to use kuids and kgids cifs: Modify struct smb_vol to use kuids and kgids cifs: Convert struct cifsFileInfo to use a kuid cifs: Convert struct cifs_fattr to use kuid and kgids cifs: Convert struct tcon_link to use a kuid. cifs: Modify struct cifs_unix_set_info_args to hold a kuid_t and a kgid_t cifs: Convert from a kuid before printing current_fsuid cifs: Use kuids and kgids SID to uid/gid mapping cifs: Pass GLOBAL_ROOT_UID and GLOBAL_ROOT_GID to keyring_alloc cifs: Use BUILD_BUG_ON to validate uids and gids are the same size cifs: Override unmappable incoming uids and gids nfsd: Enable building with user namespaces enabled. nfsd: Properly compare and initialize kuids and kgids nfsd: Store ex_anon_uid and ex_anon_gid as kuids and kgids nfsd: Modify nfsd4_cb_sec to use kuids and kgids nfsd: Handle kuids and kgids in the nfs4acl to posix_acl conversion nfsd: Convert nfsxdr to use kuids and kgids nfsd: Convert nfs3xdr to use kuids and kgids ...
2013-02-15SUNRPC: remove "cache_request" argument in sunrpc_cache_pipe_upcall() functionStanislav Kinsbursky
Passing this pointer is redundant since it's stored on cache_detail structure, which is also passed to sunrpc_cache_pipe_upcall () function. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-02-15SUNRPC: introduce cache_detail->cache_request callbackStanislav Kinsbursky
This callback will allow to simplify upcalls in further patches in this series. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-02-13sunrpc: Use kuid_t and kgid_t where appropriateEric W. Biederman
Convert variables that store uids and gids to be of type kuid_t and kgid_t instead of type uid_t and gid_t. Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2013-02-08sunrpc: trim off trailing checksum before returning decrypted or integrity ↵Jeff Layton
authenticated buffer When GSSAPI integrity signatures are in use, or when we're using GSSAPI privacy with the v2 token format, there is a trailing checksum on the xdr_buf that is returned. It's checked during the authentication stage, and afterward nothing cares about it. Ordinarily, it's not a problem since the XDR code generally ignores it, but it will be when we try to compute a checksum over the buffer to help prevent XID collisions in the duplicate reply cache. Fix the code to trim off the checksums after verifying them. Note that in unwrap_integ_data, we must avoid trying to reverify the checksum if the request was deferred since it will no longer be present when it's revisited. Signed-off-by: Jeff Layton <jlayton@redhat.com>
2013-02-05sunrpc: fix comment in struct xdr_buf definitionJeff Layton
...these pages aren't necessarily contiguous. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-02-05sunrpc: move address copy/cmp/convert routines and prototypes from clnt.h to ↵Jeff Layton
addr.h These routines are used by server and client code, so having them in a separate header would be best. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-02-05sunrpc: copy scope ID in __rpc_copy_addr6Jeff Layton
When copying an address, we should also copy the scopeid in the event that this is a link-local address and the scope matters. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-02-04nfsd: fix IPv6 address handling in the DRCJeff Layton
Currently, it only stores the first 16 bytes of any address. struct sockaddr_in6 is 28 bytes however, so we're currently ignoring the last 12 bytes of the address. Expand the c_addr field to a sockaddr_in6, and cast it to a sockaddr_in as necessary. Also fix the comparitor to use the existing RPC helpers for this. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-02-01SUNRPC: Nuke the tk_xprt macroTrond Myklebust
It is no longer in use Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-02-01SUNRPC: Pass pointers to struct rpc_xprt to the congestion windowTrond Myklebust
Avoid access to task->tk_xprt Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-02-01SUNRPC: Pass a pointer to struct rpc_xprt to the connect callbackTrond Myklebust
Avoid another RCU dereference by passing the pointer to struct rpc_xprt from the caller. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-01-23sunrpc: Fix lockd sleeping until timeoutAndriy Skulysh
There is a race in enqueueing thread to a pool and waking up a thread. lockd doesn't wake up on reception of lock granted callback if svc_wake_up() is called before lockd's thread is added to a pool. Signed-off-by: Andriy Skulysh <Andriy_Skulysh@xyratex.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2012-12-20Merge branch 'for-3.8' of git://linux-nfs.org/~bfields/linuxLinus Torvalds
Pull nfsd update from Bruce Fields: "Included this time: - more nfsd containerization work from Stanislav Kinsbursky: we're not quite there yet, but should be by 3.9. - NFSv4.1 progress: implementation of basic backchannel security negotiation and the mandatory BACKCHANNEL_CTL operation. See http://wiki.linux-nfs.org/wiki/index.php/Server_4.0_and_4.1_issues for remaining TODO's - Fixes for some bugs that could be triggered by unusual compounds. Our xdr code wasn't designed with v4 compounds in mind, and it shows. A more thorough rewrite is still a todo. - If you've ever seen "RPC: multiple fragments per record not supported" logged while using some sort of odd userland NFS client, that should now be fixed. - Further work from Jeff Layton on our mechanism for storing information about NFSv4 clients across reboots. - Further work from Bryan Schumaker on his fault-injection mechanism (which allows us to discard selective NFSv4 state, to excercise rarely-taken recovery code paths in the client.) - The usual mix of miscellaneous bugs and cleanup. Thanks to everyone who tested or contributed this cycle." * 'for-3.8' of git://linux-nfs.org/~bfields/linux: (111 commits) nfsd4: don't leave freed stateid hashed nfsd4: free_stateid can use the current stateid nfsd4: cleanup: replace rq_resused count by rq_next_page pointer nfsd: warn on odd reply state in nfsd_vfs_read nfsd4: fix oops on unusual readlike compound nfsd4: disable zero-copy on non-final read ops svcrpc: fix some printks NFSD: Correct the size calculation in fault_inject_write NFSD: Pass correct buffer size to rpc_ntop nfsd: pass proper net to nfsd_destroy() from NFSd kthreads nfsd: simplify service shutdown nfsd: replace boolean nfsd_up flag by users counter nfsd: simplify NFSv4 state init and shutdown nfsd: introduce helpers for generic resources init and shutdown nfsd: make NFSd service structure allocated per net nfsd: make NFSd service boot time per-net nfsd: per-net NFSd up flag introduced nfsd: move per-net startup code to separated function nfsd: pass net to __write_ports() and down nfsd: pass net to nfsd_set_nrthreads() ...
2012-12-17nfsd4: cleanup: replace rq_resused count by rq_next_page pointerJ. Bruce Fields
It may be a matter of personal taste, but I find this makes the code clearer. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2012-12-06SUNRPC: Don't allow low priority tasks to pre-empt higher priority onesTrond Myklebust
Currently, the priority queues attempt to be 'fair' to lower priority tasks by scheduling them after a certain number of higher priority tasks have run. The problem is that both the transport send queue and the NFSv4.1 session slot queue have strong ordering requirements. This patch therefore removes the fairness code in favour of strong ordering of task priorities. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-12-04svcrpc: track rpc data length separately from sk_tcplenJ. Bruce Fields
Keep a separate field, sk_datalen, that tracks only the data contained in a fragment, not including the fragment header. For now, this is always just max(0, sk_tcplen - 4), but after we allow multiple fragments sk_datalen will accumulate the total rpc data size while sk_tcplen only tracks progress receiving the current fragment. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2012-12-04svcrpc: don't byte-swap sk_reclen in placeJ. Bruce Fields
Byte-swapping in place is always a little dubious. Let's instead define this field to always be big-endian, and do the swapping on demand where we need it. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2012-11-15svcrpc: Revert "sunrpc/cache.h: replace simple_strtoul"J. Bruce Fields
Commit bbf43dc888833ac0539e437dbaeb28bfd4fbab9f "sunrpc/cache.h: replace simple_strtoul" introduced new range-checking which could cause get_int to fail on unsigned integers too large to be represented as an int. We could parse them as unsigned instead--but it turns out svcgssd is actually passing down "-1" in some cases. Which is perhaps stupid, but there's nothing we can do about it now. So just revert back to the previous "sloppy" behavior that accepts either representation. Cc: stable@vger.kernel.org Reported-by: Sven Geggus <lists@fuchsschwanzdomain.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2012-10-17UAPI: Remove empty non-UAPI Kbuild filesDavid Howells
Remove non-UAPI Kbuild files that have become empty as a result of UAPI disintegration. They used to have only header-y lines in them and those have now moved to the Kbuild files in the corresponding uapi/ directories. Possibly these should not be removed but rather have a comment inserted to say they are intentionally left blank. This would make it easier to add generated header lines in future without having to restore the infrastructure. Note that at this point not all the UAPI disintegration parts have been merged, so it is likely that more empty Kbuild files will turn up. It is probably necessary to make the files non-empty to prevent the patch program from automatically deleting them when it reduces them to nothing. Signed-off-by: David Howells <dhowells@redhat.com>
2012-10-13Merge branch 'for-3.7' of git://linux-nfs.org/~bfields/linuxLinus Torvalds
Pull nfsd update from J Bruce Fields: "Another relatively quiet cycle. There was some progress on my remaining 4.1 todo's, but a couple of them were just of the form "check that we do X correctly", so didn't have much affect on the code. Other than that, a bunch of cleanup and some bugfixes (including an annoying NFSv4.0 state leak and a busy-loop in the server that could cause it to peg the CPU without making progress)." * 'for-3.7' of git://linux-nfs.org/~bfields/linux: (46 commits) UAPI: (Scripted) Disintegrate include/linux/sunrpc UAPI: (Scripted) Disintegrate include/linux/nfsd nfsd4: don't allow reclaims of expired clients nfsd4: remove redundant callback probe nfsd4: expire old client earlier nfsd4: separate session allocation and initialization nfsd4: clean up session allocation nfsd4: minor free_session cleanup nfsd4: new_conn_from_crses should only allocate nfsd4: separate connection allocation and initialization nfsd4: reject bad forechannel attrs earlier nfsd4: enforce per-client sessions/no-sessions distinction nfsd4: set cl_minorversion at create time nfsd4: don't pin clientids to pseudoflavors nfsd4: fix bind_conn_to_session xdr comment nfsd4: cast readlink() bug argument NFSD: pass null terminated buf to kstrtouint() nfsd: remove duplicate init in nfsd4_cb_recall nfsd4: eliminate redundant nfs4_free_stateid fs/nfsd/nfs4idmap.c: adjust inconsistent IS_ERR and PTR_ERR ...
2012-10-09nfs: disintegrate UAPI for nfsJ. Bruce Fields
This is to complete part of the Userspace API (UAPI) disintegration for which the preparatory patches were pulled recently. After these patches, userspace headers will be segregated into: include/uapi/linux/.../foo.h for the userspace interface stuff, and: include/linux/.../foo.h for the strictly kernel internal stuff. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2012-10-09UAPI: (Scripted) Disintegrate include/linux/sunrpcDavid Howells
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dave Jones <davej@redhat.com>
2012-10-01SUNRPC: Introduce rpc_clone_client_set_auth()Chuck Lever
An ULP is supposed to be able to replace a GSS rpc_auth object with another GSS rpc_auth object using rpcauth_create(). However, rpcauth_create() in 3.5 reliably fails with -EEXIST in this case. This is because when gss_create() attempts to create the upcall pipes, sometimes they are already there. For example if a pipe FS mount event occurs, or a previous GSS flavor was in use for this rpc_clnt. It turns out that's not the only problem here. While working on a fix for the above problem, we noticed that replacing an rpc_clnt's rpc_auth is not safe, since dereferencing the cl_auth field is not protected in any way. So we're deprecating the ability of rpcauth_create() to switch an rpc_clnt's security flavor during normal operation. Instead, let's add a fresh API that clones an rpc_clnt and gives the clone a new flavor before it's used. This makes immediate use of the new __rpc_clone_client() helper. This can be used in a similar fashion to rpcauth_create() when a client is hunting for the correct security flavor. Instead of replacing an rpc_clnt's security flavor in a loop, the ULP replaces the whole rpc_clnt. To fix the -EEXIST problem, any ULP logic that relies on replacing an rpc_clnt's rpc_auth with rpcauth_create() must be changed to use this API instead. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-09-28SUNRPC: Get rid of the redundant xprt->shutdown bit fieldTrond Myklebust
It is only set after everyone has dereferenced the transport, and serves no useful purpose: setting it is racy, so all the socket code, etc still needs to be able to cope with the cases where they miss reading it. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-09-10nfsd: remove unused listener-removal interfacesJ. Bruce Fields
You can use nfsd/portlist to give nfsd additional sockets to listen on. In theory you can also remove listening sockets this way. But nobody's ever done that as far as I can tell. Also this was partially broken in 2.6.25, by a217813f9067b785241cb7f31956e51d2071703a "knfsd: Support adding transports by writing portlist file". (Note that we decide whether to take the "delfd" case by checking for a digit--but what's actually expected in that case is something made by svc_one_sock_name(), which won't begin with a digit.) So, let's just rip out this stuff. Acked-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2012-09-07SUNRPC: Fix a UDP transport regressionTrond Myklebust
Commit 43cedbf0e8dfb9c5610eb7985d5f21263e313802 (SUNRPC: Ensure that we grab the XPRT_LOCK before calling xprt_alloc_slot) is causing hangs in the case of NFS over UDP mounts. Since neither the UDP or the RDMA transport mechanism use dynamic slot allocation, we can skip grabbing the socket lock for those transports. Add a new rpc_xprt_op to allow switching between the TCP and UDP/RDMA case. Note that the NFSv4.1 back channel assigns the slot directly through rpc_run_bc_task, so we can ignore that case. Reported-by: Dick Streefland <dick.streefland@altium.nl> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@vger.kernel.org [>= 3.1]
2012-08-21svcrpc: make svc_xprt_received staticJ. Bruce Fields
Note this isn't used outside svc_xprt.c. May as well move it so we don't need a declaration while we're here. Also remove an outdated comment. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2012-08-21svcrpc: don't bother checking bad svc_addr_len resultJ. Bruce Fields
None of the callers should see an unsupported address family (only one of them even bothers to check for that case), so just check for the buggy case in svc_addr_len and don't bother elsewhere. Acked-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2012-08-21svcrpc: share some setup of listening socketsJ. Bruce Fields
There's some duplicate code here. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2012-07-31Merge branch 'akpm' (Andrew's patch-bomb)Linus Torvalds
Merge Andrew's second set of patches: - MM - a few random fixes - a couple of RTC leftovers * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (120 commits) rtc/rtc-88pm80x: remove unneed devm_kfree rtc/rtc-88pm80x: assign ret only when rtc_register_driver fails mm: hugetlbfs: close race during teardown of hugetlbfs shared page tables tmpfs: distribute interleave better across nodes mm: remove redundant initialization mm: warn if pg_data_t isn't initialized with zero mips: zero out pg_data_t when it's allocated memcg: gix memory accounting scalability in shrink_page_list mm/sparse: remove index_init_lock mm/sparse: more checks on mem_section number mm/sparse: optimize sparse_index_alloc memcg: add mem_cgroup_from_css() helper memcg: further prevent OOM with too many dirty pages memcg: prevent OOM with too many dirty pages mm: mmu_notifier: fix freed page still mapped in secondary MMU mm: memcg: only check anon swapin page charges for swap cache mm: memcg: only check swap cache pages for repeated charging mm: memcg: split swapin charge function into private and public part mm: memcg: remove needless !mm fixup to init_mm when charging mm: memcg: remove unneeded shmem charge type ...
2012-07-31nfs: enable swap on NFSMel Gorman
Implement the new swapfile a_ops for NFS and hook up ->direct_IO. This will set the NFS socket to SOCK_MEMALLOC and run socket reconnect under PF_MEMALLOC as well as reset SOCK_MEMALLOC before engaging the protocol ->connect() method. PF_MEMALLOC should allow the allocation of struct socket and related objects and the early (re)setting of SOCK_MEMALLOC should allow us to receive the packets required for the TCP connection buildup. [jlayton@redhat.com: Restore PF_MEMALLOC task flags in all cases] [dfeng@redhat.com: Fix handling of multiple swap files] [a.p.zijlstra@chello.nl: Original patch] Signed-off-by: Mel Gorman <mgorman@suse.de> Acked-by: Rik van Riel <riel@redhat.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: David S. Miller <davem@davemloft.net> Cc: Eric B Munson <emunson@mgebm.net> Cc: Eric Paris <eparis@redhat.com> Cc: James Morris <jmorris@namei.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Mike Christie <michaelc@cs.wisc.edu> Cc: Neil Brown <neilb@suse.de> Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Xiaotian Feng <dfeng@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-07-31Merge branch 'nfsd-next' of git://linux-nfs.org/~bfields/linuxLinus Torvalds
Pull nfsd changes from J. Bruce Fields: "This has been an unusually quiet cycle--mostly bugfixes and cleanup. The one large piece is Stanislav's work to containerize the server's grace period--but that in itself is just one more step in a not-yet-complete project to allow fully containerized nfs service. There are a number of outstanding delegation, container, v4 state, and gss patches that aren't quite ready yet; 3.7 may be wilder." * 'nfsd-next' of git://linux-nfs.org/~bfields/linux: (35 commits) NFSd: make boot_time variable per network namespace NFSd: make grace end flag per network namespace Lockd: move grace period management from lockd() to per-net functions LockD: pass actual network namespace to grace period management functions LockD: manage grace list per network namespace SUNRPC: service request network namespace helper introduced NFSd: make nfsd4_manager allocated per network namespace context. LockD: make lockd manager allocated per network namespace LockD: manage grace period per network namespace Lockd: add more debug to host shutdown functions Lockd: host complaining function introduced LockD: manage used host count per networks namespace LockD: manage garbage collection timeout per networks namespace LockD: make garbage collector network namespace aware. LockD: mark host per network namespace on garbage collect nfsd4: fix missing fault_inject.h include locks: move lease-specific code out of locks_delete_lock locks: prevent side-effects of locks_release_private before file_lock is initialized NFSd: set nfsd_serv to NULL after service destruction NFSd: introduce nfsd_destroy() helper ...
2012-07-27SUNRPC: service request network namespace helper introducedStanislav Kinsbursky
This is a cleanup patch - makes code looks simplier. It replaces widely used rqstp->rq_xprt->xpt_net by introduced SVC_NET(rqstp). Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>