- 07 Nov, 2016 1 commit
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Anna Schumaker authored
We need to hold the rcu_read_lock() when calling rcu_dereference(), otherwise we can't guarantee that the object being dereferenced still exists. Fixes: 39e5d2df ("SUNRPC search xprt switch for sockaddr") Signed-off-by:
Anna Schumaker <Anna.Schumaker@Netapp.com>
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- 24 Oct, 2016 2 commits
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Arnd Bergmann authored
A bugfix introduced a harmless gcc warning in nfs4_slot_seqid_in_use if we enable -Wmaybe-uninitialized again: fs/nfs/nfs4session.c:203:54: error: 'cur_seq' may be used uninitialized in this function [-Werror=maybe-uninitialized] gcc is not smart enough to conclude that the IS_ERR/PTR_ERR pair results in a nonzero return value here. Using PTR_ERR_OR_ZERO() instead makes this clear to the compiler. The warning originally did not appear in v4.8 as it was globally disabled, but the bugfix that introduced the warning got backported to stable kernels which again enable it, and this is now the only warning in the v4.7 builds. Fixes: e09c978a ("NFSv4.1: Fix Oopsable condition in server callback races") Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Cc: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by:
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Benjamin Coddington authored
A NFSv4 mount of a subdirectory will show an extra slash (as in 'server://path') in proc's mountinfo which will not match the device name and path. This can cause problems for programs searching for the mount. Fix this by checking for a leading slash in the dentry path, if so trim away any trailing slashes in the device name. Signed-off-by:
Benjamin Coddington <bcodding@redhat.com> Signed-off-by:
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- 19 Oct, 2016 1 commit
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Arnd Bergmann authored
A bugfix introduced a harmless warning for update_open_stateid: fs/nfs/nfs4proc.c:1548:2: error: missing braces around initializer [-Werror=missing-braces] Removing the zero in the initializer will do the right thing here and initialize the entire structure to zero. Fixes: 1393d961 ("NFSv4: Fix a race when updating an open_stateid") Signed-off-by:
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- 13 Oct, 2016 1 commit
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Benjamin Coddington authored
Commit 41963c10 sets the block layout's last written byte to the offset of the end of the extent rather than the end of the write which incorrectly updates the inode's size for partial-page writes. Fixes: 41963c10 ("pnfs/blocklayout: update last_write_offset atomically with extents") Signed-off-by:
Christoph Hellwig <hch@lst.de> Tested-by:
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- 04 Oct, 2016 2 commits
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Jeff Layton authored
The caller of rpc_run_task also gets a reference that must be put. Signed-off-by:
Jeff Layton <jeff.layton@primarydata.com> Cc: stable@vger.kernel.org # 4.2+ Signed-off-by:
Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by:
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Deepa Dinamani authored
boot_time is represented as a struct timespec. struct timespec and CURRENT_TIME are not y2038 safe. Overall, the plan is to use timespec64 and ktime_t for all internal kernel representation of timestamps. CURRENT_TIME will also be removed. boot_time is used to construct the nfs client boot verifier. Use ktime_t to represent boot_time and ktime_get_real() for the boot_time value. Following Trond's request https://lkml.org/lkml/2016/6/9/22 , use ktime_t instead of converting to struct timespec64. Use higher and lower 32 bit parts of ktime_t for the boot verifier. Use the lower 32 bit part of ktime_t for the authsys_parms stamp field. Signed-off-by:
Deepa Dinamani <deepa.kernel@gmail.com> Reviewed-by:
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- 30 Sep, 2016 5 commits
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Frank Sorenson authored
Replace the generic code to hash the auth_cred with the call to the auth-specific hash function in the rpc_authops struct. Signed-off-by:
Frank Sorenson <sorenson@redhat.com> Signed-off-by:
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Frank Sorenson authored
Add a hash_cred() function for RPCSEC_GSS, using only the uid from the auth_cred. Signed-off-by:
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Frank Sorenson authored
Add a hash_cred() function for auth_unix, using both the uid and gid from the auth_cred. Signed-off-by:
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Frank Sorenson authored
Add a hash_cred() function for generic_auth, using both the uid and gid from the auth_cred. Signed-off-by:
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Frank Sorenson authored
Currently, a single hash algorithm is used to hash the auth_cred for the credcache for all rpc_auth types. Add a hash_cred() function to the rpc_authops struct to allow a hash function specific to each auth flavor. Signed-off-by:
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- 29 Sep, 2016 1 commit
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Olga Kornievskaia authored
If an operation got interrupted, then since we don't know if the server processed it on not, we keep the seq#. Upon reuse of slot and seq# if we get reply from the cache (ie EREMOTEIO) then we need to retry the operation after bumping the seq# Signed-off-by:
Olga Kornievskaia <kolga@netapp.com> Signed-off-by:
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- 27 Sep, 2016 27 commits
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Trond Myklebust authored
Fix the code so that we always mark the atime as invalid in nfs4_read_done(). Currently, the expectation appears to be that the pNFS drivers should always do this, with the result that most of them don't. Signed-off-by:
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Ke Wang authored
sunrpc uses workqueue to clean cache regulary. There is no real dependency of executing work on the cpu which queueing it. On a idle system, especially for a heterogeneous systems like big.LITTLE, it is observed that the big idle cpu was woke up many times just to service this work, which against the principle of power saving. It would be better if we can schedule it on a cpu which the scheduler believes to be the most appropriate one. After apply this patch, system_wq will be replaced by system_power_efficient_wq for sunrpc. This functionality is enabled when CONFIG_WQ_POWER_EFFICIENT is selected. Signed-off-by:
Ke Wang <ke.wang@spreadtrum.com> Signed-off-by:
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Trond Myklebust authored
TEST_STATEID only tells you that you have a valid open stateid. It doesn't tell the client anything about whether or not it holds the required share locks. Signed-off-by:
Oleg Drokin <green@linuxhacker.ru> [Anna: Wrap nfs_open_stateid_recover_openmode in CONFIG_NFS_V4_1 checks] Signed-off-by:
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Trond Myklebust authored
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Trond Myklebust authored
_nfs41_free_stateid() needs to be cached by the session, but nfs41_test_stateid() may return NFS4ERR_RETRY_UNCACHED_REP (in which case we should just retry). Signed-off-by:
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Trond Myklebust authored
If the file permissions change on the server, then we may not be able to recover open state. If so, we need to ensure that we mark the file descriptor appropriately. Cc: stable@vger.kernel.org Signed-off-by:
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Trond Myklebust authored
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Trond Myklebust authored
We need to test the NFS_OPEN_STATE flag for whether or not the open_stateid is valid. Signed-off-by:
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Trond Myklebust authored
If we're not yet sure that all state has expired or been revoked, we should try to do a minimal recovery on just the one stateid. Signed-off-by:
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Trond Myklebust authored
Don't rely on nfs_inode_detach_delegation() succeeding. That can race... Signed-off-by:
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Trond Myklebust authored
If we're replacing an old stateid which has a different 'other' field, then we probably need to free the old stateid. Signed-off-by:
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Trond Myklebust authored
If we race with a delegreturn before taking the spin lock, we currently end up dropping the delegation stateid. Signed-off-by:
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Trond Myklebust authored
The actual stateid used in the READ or WRITE can represent a delegation, a lock or a stateid, so it is useful to pass it as an argument to the exception handler when an expired/revoked response is received from the server. It also ensures that we don't re-label the state as needing recovery if that has already occurred. Signed-off-by:
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Trond Myklebust authored
Handle revoked open/lock/delegation stateids when LAYOUTGET tells us the state was revoked. Signed-off-by:
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Trond Myklebust authored
If the server tells us our stateid has expired, then handle that as if it was revoked. Signed-off-by:
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Trond Myklebust authored
If the server tells us our stateid has expired, then handle that as if it was revoked. Signed-off-by:
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Trond Myklebust authored
Modify the helper nfs_inode_find_state_and_recover() so that it can check all open/lock/delegation state trackers on that inode for whether or not they need are affected by a revoked stateid error. Signed-off-by:
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Trond Myklebust authored
This fixes a potential infinite loop in nfs_reap_expired_delegations. Signed-off-by:
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Trond Myklebust authored
If a server returns NFS4ERR_ADMIN_REVOKED, NFS4ERR_DELEG_REVOKED or NFS4ERR_EXPIRED on a call to close, open_downgrade, delegreturn, or locku, we should call FREE_STATEID before attempting to recover. Signed-off-by:
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Trond Myklebust authored
Nothing should need to be serialised with FREE_STATEID on the client, so let's make the RPC call always asynchronous. Also constify the stateid argument. Signed-off-by:
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Trond Myklebust authored
Right now, we're only running TEST/FREE_STATEID on the locks if the open stateid recovery succeeds. The protocol requires us to always do so. The fix would be to move the call to TEST/FREE_STATEID and do it before we attempt open recovery. Signed-off-by:
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Trond Myklebust authored
In some cases (e.g. when the SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED sequence flag is set) we may already know that the stateid was revoked and that the only valid operation we can call is FREE_STATEID. In those cases, allow the stateid to carry the information in the type field, so that we skip the redundant call to TEST_STATEID. Signed-off-by:
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Trond Myklebust authored
Ensure we don't spam the server with test_stateid() calls for delegations that have already been checked. Signed-off-by:
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Trond Myklebust authored
Ensure that if the server reboots while we're testing and recovering from revoked delegations, we exit to allow the state manager to handle matters. Signed-off-by:
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Trond Myklebust authored
According to RFC5661, if any of the SEQUENCE status bits SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED, SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED, SEQ4_STATUS_ADMIN_STATE_REVOKED, or SEQ4_STATUS_RECALLABLE_STATE_REVOKED are set, then we need to use TEST_STATEID to figure out which stateids have been revoked, so we can acknowledge the loss of state using FREE_STATEID. While we already do this for open and lock state, we have not been doing so for all the delegations. Signed-off-by:
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Trond Myklebust authored
Allow the callers of nfs_remove_bad_delegation() to specify the stateid that needs to be marked as bad. Signed-off-by:
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Trond Myklebust authored
In NFSv4.1 and newer, if the server decides to revoke some or all of the protocol state, the client is required to iterate through all the stateids that it holds and call TEST_STATEID to determine which stateids still correspond to valid state, and then call FREE_STATEID on the others. Signed-off-by:
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