- 06 9月, 2013 1 次提交
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由 Trond Myklebust 提交于
If we're doing buffered writes, and there is no file locking involved, then we don't have to worry about whether or not the lock owner information is identical. By relaxing this check, we ensure that fork()ed child processes can write to a page without having to first sync dirty data that was written by the parent to disk. Reported-by: NQuentin Barnes <qbarnes@gmail.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com> Tested-by: NQuentin Barnes <qbarnes@gmail.com>
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- 05 9月, 2013 11 次提交
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由 Weston Andros Adamson 提交于
Signed-off-by: NWeston Andros Adamson <dros@netapp.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Weston Andros Adamson 提交于
WRITE and COMMIT can use the machine credential. If WRITE is supported and COMMIT is not, make all (mach cred) writes FILE_SYNC4. Signed-off-by: NWeston Andros Adamson <dros@netapp.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Weston Andros Adamson 提交于
TEST_STATEID and FREE_STATEID can use the machine credential. Signed-off-by: NWeston Andros Adamson <dros@netapp.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Weston Andros Adamson 提交于
SECINFO and SECINFO_NONAME can use the machine credential. Signed-off-by: NWeston Andros Adamson <dros@netapp.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Weston Andros Adamson 提交于
CLOSE and LOCKU can use the machine credential. Signed-off-by: NWeston Andros Adamson <dros@netapp.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Weston Andros Adamson 提交于
Add nfs4_state_protect - the function responsible for switching to the machine credential and the correct rpc client when SP4_MACH_CRED is in use. Signed-off-by: NWeston Andros Adamson <dros@netapp.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Weston Andros Adamson 提交于
This is a minimal client side implementation of SP4_MACH_CRED. It will attempt to negotiate SP4_MACH_CRED iff the EXCHANGE_ID is using krb5i or krb5p auth. SP4_MACH_CRED will be used if the server supports the minimal operations: BIND_CONN_TO_SESSION EXCHANGE_ID CREATE_SESSION DESTROY_SESSION DESTROY_CLIENTID This patch only includes the EXCHANGE_ID negotiation code because the client will already use the machine cred for these operations. If the server doesn't support SP4_MACH_CRED or doesn't support the minimal operations, the exchange id will be resent with SP4_NONE. Signed-off-by: NWeston Andros Adamson <dros@netapp.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Trond Myklebust 提交于
Rename the new 'recover_locks' kernel parameter to 'recover_lost_locks' and change the default to 'false'. Document why in Documentation/kernel-parameters.txt Move the 'recover_lost_locks' kernel parameter to fs/nfs/super.c to make it easy to backport to kernels prior to 3.6.x, which don't have a separate NFSv4 module. Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 NeilBrown 提交于
When an NFSv4 client loses contact with the server it can lose any locks that it holds. Currently when it reconnects to the server it simply tries to reclaim those locks. This might succeed even though some other client has held and released a lock in the mean time. So the first client might think the file is unchanged, but it isn't. This isn't good. If, when recovery happens, the locks cannot be claimed because some other client still holds the lock, then we get a message in the kernel logs, but the client can still write. So two clients can both think they have a lock and can both write at the same time. This is equally not good. There was a patch a while ago http://comments.gmane.org/gmane.linux.nfs/41917 which tried to address some of this, but it didn't seem to go anywhere. That patch would also send a signal to the process. That might be useful but for now this patch just causes writes to fail. For NFSv4 (unlike v2/v3) there is a strong link between the lock and the write request so we can fairly easily fail any IO of the lock is gone. While some applications might not expect this, it is still safer than allowing the write to succeed. Because this is a fairly big change in behaviour a module parameter, "recover_locks", is introduced which defaults to true (the current behaviour) but can be set to "false" to tell the client not to try to recover things that were lost. Signed-off-by: NNeilBrown <neilb@suse.de> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Chuck Lever 提交于
When CONFIG_NFS_V4_1 is not enabled, gcc emits this warning: linux/fs/nfs/nfs4state.c:255:12: warning: ‘nfs4_begin_drain_session’ defined but not used [-Wunused-function] static int nfs4_begin_drain_session(struct nfs_client *clp) ^ Eventually NFSv4.0 migration recovery will invoke this function, but that has not yet been merged. Hide nfs4_begin_drain_session() behind CONFIG_NFS_V4_1 for now. Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Chuck Lever 提交于
linux/fs/nfs/nfs4session.c:337:6: warning: symbol 'nfs41_set_target_slotid' was not declared. Should it be static? Move nfs41_set_target_slotid() and nfs41_update_target_slotid() back behind CONFIG_NFS_V4_1, since, in the final revision of this work, they are used only in NFSv4.1 and later. Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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- 04 9月, 2013 18 次提交
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由 Chuck Lever 提交于
Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Chuck Lever 提交于
Ensure OPEN_CONFIRM is not emitted while the transport is plugged. Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Chuck Lever 提交于
Ensure RELEASE_LOCKOWNER is not emitted while the transport is plugged. Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Chuck Lever 提交于
When CONFIG_NFS_V4_1 is disabled, the calls to nfs4_setup_sequence() and nfs4_sequence_done() are compiled out for the DELEGRETURN operation. To allow NFSv4.0 transport blocking to work for DELEGRETURN, these call sites have to be present all the time. Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Chuck Lever 提交于
Plumb in a mechanism for plugging an NFSv4.0 mount, using the same infrastructure as NFSv4.1 sessions. Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Chuck Lever 提交于
Anchor an nfs4_slot_table in the nfs_client for use with NFSv4.0 transport blocking. It is initialized only for NFSv4.0 nfs_client's. Introduce appropriate minor version ops to handle nfs_client initialization and shutdown requirements that differ for each minor version. Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Chuck Lever 提交于
The nfs4_destroy_slot_tables() function is renamed to avoid confusion with the new helper. Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Chuck Lever 提交于
Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Chuck Lever 提交于
I'd like to re-use NFSv4.1's slot table machinery for NFSv4.0 transport blocking. Re-organize some of nfs4session.c so the slot table code is built even when NFS_V4_1 is disabled. Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Chuck Lever 提交于
Clean up. Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Chuck Lever 提交于
Refactor nfs4_call_sync_sequence() so it is used for NFSv4.0 now. The RPC callouts will house transport blocking logic similar to NFSv4.1 sessions. Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Chuck Lever 提交于
NFSv4.0 will have need for this functionality when I add the ability to block NFSv4.0 traffic before migration recovery. I'm not really clear on why nfs4_set_sequence_privileged() gets a generic name, but nfs41_init_sequence() gets a minor version-specific name. Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Chuck Lever 提交于
Clean up: Both the NFSv4.0 and NFSv4.1 version of nfs4_setup_sequence() are used only in fs/nfs/nfs4proc.c. No need to keep global header declarations for either version. Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Chuck Lever 提交于
Clean up: rename nfs41_call_sync_data for use as a data structure common to all NFSv4 minor versions. Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Chuck Lever 提交于
Clean up, since slot and sequence numbers are all unsigned anyway. Among other things, squelch compiler warnings: linux/fs/nfs/nfs4proc.c: In function ‘nfs4_setup_sequence’: linux/fs/nfs/nfs4proc.c:703:2: warning: signed and unsigned type in conditional expression [-Wsign-compare] and linux/fs/nfs/nfs4session.c: In function ‘nfs4_alloc_slot’: linux/fs/nfs/nfs4session.c:151:31: warning: signed and unsigned type in conditional expression [-Wsign-compare] Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Trond Myklebust 提交于
If an NFS client does mkdir("dir"); fd = open("dir/file"); unlink("dir/file"); close(fd); rmdir("dir"); then the asynchronous nature of the sillyrename operation means that we can end up getting EBUSY for the rmdir() in the above test. Fix that by ensuring that we wait for any in-progress sillyrenames before sending the rmdir() to the server. Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Weston Andros Adamson 提交于
Commit 5ec16a85 introduced a regression that causes SECINFO to fail without actualy sending an RPC if: 1) the nfs_client's rpc_client was using KRB5i/p (now tried by default) 2) the current user doesn't have valid kerberos credentials This situation is quite common - as of now a sec=sys mount would use krb5i for the nfs_client's rpc_client and a user would hardly be faulted for not having run kinit. The solution is to use the machine cred when trying to use an integrity protected auth flavor for SECINFO. Older servers may not support using the machine cred or an integrity protected auth flavor for SECINFO in every circumstance, so we fall back to using the user's cred and the filesystem's auth flavor in this case. We run into another problem when running against linux nfs servers - they return NFS4ERR_WRONGSEC when using integrity auth flavor (unless the mount is also that flavor) even though that is not a valid error for SECINFO*. Even though it's against spec, handle WRONGSEC errors on SECINFO by falling back to using the user cred and the filesystem's auth flavor. Signed-off-by: NWeston Andros Adamson <dros@netapp.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Andy Adamson 提交于
We must avoid buffering a WRITE that is using a credential key (e.g. a GSS context key) that is about to expire or has expired. We currently will paint ourselves into a corner by returning success to the applciation for such a buffered WRITE, only to discover that we do not have permission when we attempt to flush the WRITE (and potentially associated COMMIT) to disk. Use the RPC layer credential key timeout and expire routines which use a a watermark, gss_key_expire_timeo. We test the key in nfs_file_write. If a WRITE is using a credential with a key that will expire within watermark seconds, flush the inode in nfs_write_end and send only NFS_FILE_SYNC WRITEs by adding nfs_ctx_key_to_expire to nfs_need_sync_write. Note that this results in single page NFS_FILE_SYNC WRITEs. Signed-off-by: NAndy Adamson <andros@netapp.com> [Trond: removed a pr_warn_ratelimited() for now] Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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- 01 9月, 2013 1 次提交
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由 Trond Myklebust 提交于
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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- 30 8月, 2013 3 次提交
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由 Trond Myklebust 提交于
Ensure that __nfs_idmap_unregister can be called twice without consequences. Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Trond Myklebust 提交于
The clnt->cl_principal is being used exclusively to store the service target name for RPCSEC_GSS/krb5 callbacks. Replace it with something that is stored only in the RPCSEC_GSS-specific code. Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Trond Myklebust 提交于
We don't want to pass the context argument to trace_nfs_atomic_open_exit() after it has been released. Reported-by: NDan Carpenter <dan.carpenter@oracle.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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- 23 8月, 2013 1 次提交
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由 NeilBrown 提交于
After reclaiming state that was lost, the NFS client tries to reclaim any locks, and then checks that each one has NFS_LOCK_INITIALIZED set (which means that the server has confirmed the lock). However if the client holds a delegation, nfs_reclaim_locks() simply aborts (or more accurately it called nfs_lock_reclaim() and that returns without doing anything). This is because when a delegation is held, the server doesn't need to know about locks. So if a delegation is held, NFS_LOCK_INITIALIZED is not expected, and its absence is certainly not an error. So don't print the warnings if NFS_DELGATED_STATE is set. Signed-off-by: NNeilBrown <neilb@suse.de> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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- 22 8月, 2013 5 次提交
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由 Trond Myklebust 提交于
Add tracepoints to detect issues with the TEST_STATEID operation. Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Trond Myklebust 提交于
Add tracepoints to nfs41_setup_sequence and nfs41_sequence_done to track session and slot table state changes. Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Trond Myklebust 提交于
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Trond Myklebust 提交于
Set up tracepoints to track read, write and commit, as well as pNFS reads and writes and commits to the data server. Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Trond Myklebust 提交于
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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