- 04 Dec, 2012 2 commits
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J. Bruce Fields authored
Soon we want to support multiple fragments, in which case it may be legal for a single fragment to be smaller than 8 bytes, so we'll want to delay this check till we've reached the last fragment. Also fix an outdated comment. Signed-off-by:J. Bruce Fields <bfields@redhat.com>
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J. Bruce Fields authored
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:
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- 03 Dec, 2012 10 commits
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Bryan Schumaker authored
Write the client's ip address to any state file and all appropriate state for that client will be forgotten. Signed-off-by:
Bryan Schumaker <bjschuma@netapp.com> Signed-off-by:
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Bryan Schumaker authored
Controlling the read and write functions allows me to add in "forget client w.x.y.z", since we won't be limited to reading and writing only u64 values. Signed-off-by:
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Bryan Schumaker authored
I also log basic information that I can figure out about the type of state (such as number of locks for each client IP address). This can be useful for checking that state was actually dropped and later for checking if the client was able to recover. Signed-off-by:
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Bryan Schumaker authored
The eventual goal is to forget state based on ip address, so it makes sense to call this function in a for-each-client loop until the correct amount of state is forgotten. I also use this patch as an opportunity to rename the forget function from "func()" to "forget()". Signed-off-by:
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Bryan Schumaker authored
Once I have a client, I can easily use its delegation list rather than searching the file hash table for delegations to remove. Signed-off-by:
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Bryan Schumaker authored
Using "forget_n_state()" forces me to implement the code needed to forget a specific client's openowners. Signed-off-by:
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Bryan Schumaker authored
I use the new "forget_n_state()" function to iterate through each client first when searching for locks. This may slow down forgetting locks a little bit, but it implements most of the code needed to forget a specified client's locks. Signed-off-by:
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Bryan Schumaker authored
I added in a generic for-each loop that takes a pass over the client_lru list for the current net namespace and calls some function. The next few patches will update other operations to use this function as well. A value of 0 still means "forget everything that is found". Signed-off-by:
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Bryan Schumaker authored
Each function touches state in some way, so getting the lock earlier can help simplify code. Signed-off-by:
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J. Bruce Fields authored
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- 28 Nov, 2012 13 commits
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Bryan Schumaker authored
There were only a small number of functions in this file and since they all affect stored state I think it makes sense to put them in state.h instead. I also dropped most static inline declarations since there are no callers when fault injection is not enabled. Signed-off-by:
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Stanislav Kinsbursky authored
Grace time is a part of NFSv4 state engine, which is constructed per network namespace. Signed-off-by:
Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by:
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Stanislav Kinsbursky authored
Lease time is a part of NFSv4 state engine, which is constructed per network namespace. Signed-off-by:
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Stanislav Kinsbursky authored
This is a cleanup patch. Functions nfsd_pool_stats_open() and nfsd_pool_stats_release() are declared in fs/nfsd/nfsd.h. Signed-off-by:
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Stanislav Kinsbursky authored
Flag in_grace is a part of client tracking state, which is network namesapce aware. So let'a replace global static variable with per-net one. Signed-off-by:
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Stanislav Kinsbursky authored
Opening and closing of this file is done in client tracking init and exit operations. Client tracking is done in network namespace context already. So let's make this file opened and closed per network context - this will simlify it's management. Signed-off-by:
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Stanislav Kinsbursky authored
Split NFSv4 state init and shutdown into two different calls: per-net one and generic one. Per-net cwinit/shutdown pair have to be called for any namespace, generic pair - only once on NSFd kthreads start and shutdown respectively. Refresh of diff-nfsd-call-state-init-twice Signed-off-by: -
Stanislav Kinsbursky authored
This patch renames nfs4_state_start_net() into nfs4_state_create_net(), where get_net() now performed. Also it introduces new nfs4_state_start_net(), which is now responsible for state creation and initializing all per-net data and which is now called from nfs4_state_start(). Signed-off-by:
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Stanislav Kinsbursky authored
This patch renames __nfs4_state_shutdown_net() into nfs4_state_shutdown_net(), __nfs4_state_shutdown() into nfs4_state_shutdown_net() and moves all network related shutdown operations to nfs4_state_shutdown_net(). Signed-off-by:
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Stanislav Kinsbursky authored
NFSv4 delegations are stored in global list. But they are nfs4_client dependent, which is network namespace aware already. State shutdown and laundromat are done per network namespace as well. So, delegations unhash have to be done in network namespace context. Signed-off-by:
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Stanislav Kinsbursky authored
This lock protects the client lru list and session hash table, which are allocated per network namespace already. Signed-off-by:
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Stanislav Kinsbursky authored
Protection of __nfs4_state_shutdown() with nfs4_lock_state() looks redundant. This function is called by the last NFSd thread on it's exit and state lock protects actually two functions (del_recall_lru is protected by recall_lock): 1) nfsd4_client_tracking_exit 2) __nfs4_state_shutdown_net "nfsd4_client_tracking_exit" doesn't require state lock protection, because it's state can be modified only by tracker callbacks. Here a re they: 1) create: is called only from nfsd4_proc_compound. 2) remove: is called from either nfsd4_proc_compound or nfs4_laundromat. 3) check: is called only from nfsd4_proc_compound. 4) grace_done; called only from nfs4_laundromat. nfsd4_proc_compound is called onll by NFSd kthread, which is exiting right now. nfs4_laundromat is called by laundry_wq. But laundromat_work was canceled already. "__nfs4_state_shutdown_net" also doesn't require state lock protection, because all NFSd kthreads are dead, and no race can happen with NFSd start, because "nfsd_up" flag is still set. Moreover, all Nfsd shutdown is protected with global nfsd_mutex. Signed-off-by:
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J. Bruce Fields authored
That function is only called under nfsd_mutex: we know that because the only caller is nfsd_svc, via nfsd_svc nfsd_startup nfs4_state_start nfsd4_client_tracking_init client_tracking_ops->init == nfsd4_load_reboot_recovery_data The shared state accessed here includes: - user_recovery_dirname: used here, modified only by nfs4_reset_recoverydir, which can be verified to only be called under nfsd_mutex. - filesystem state, protected by i_mutex (handwaving slightly here) - rec_file, reclaim_str_hashtbl, reclaim_str_hashtbl_size: other than here, used only from code called from nfsd or laundromat threads, both of which should be started only after this runs (see nfsd_svc) and stopped before this could run again (see nfsd_shutdown, called from nfsd_last_thread). Signed-off-by:
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- 27 Nov, 2012 1 commit
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J. Bruce Fields authored
The spec requires badname, not inval, in these cases. Some callers want us to return enoent, but I can see no justification for that. Signed-off-by:
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- 26 Nov, 2012 7 commits
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J. Bruce Fields authored
Linus has pointed out that indiscriminate use of BUG's can make it harder to diagnose bugs because they can bring a machine down, often before we manage to get any useful debugging information to the logs. (Consider, for example, a BUG() that fires in a workqueue, or while holding a spinlock). Most of these BUG's won't do much more than kill an nfsd thread, but it would still probably be safer to get out the warning without dying. There's still more of this to do in nfsd/. Signed-off-by: -
J. Bruce Fields authored
Our server rejects compounds containing more than one write operation. It's unclear whether this is really permitted by the spec; with 4.0, it's possibly OK, with 4.1 (which has clearer limits on compound parameters), it's probably not OK. No client that we're aware of has ever done this, but in theory it could be useful. The source of the limitation: we need an array of iovecs to pass to the write operation. In the worst case that array of iovecs could have hundreds of elements (the maximum rwsize divided by the page size), so it's too big to put on the stack, or in each compound op. So we instead keep a single such array in the compound argument. We fill in that array at the time we decode the xdr operation. But we decode every op in the compound before executing any of them. So once we've used that array we can't decode another write. If we instead delay filling in that array till the time we actually perform the write, we can reuse it. Another option might be to switch to decoding compound ops one at a time. I considered doing that, but it has a number of other side effects, and I'd rather fix just this one problem for now. Signed-off-by: -
J. Bruce Fields authored
In preparation for moving some of this elsewhere. Signed-off-by: -
J. Bruce Fields authored
In preparation for moving some of it elsewhere. Signed-off-by: -
J. Bruce Fields authored
The comment here is totally bogus: - OP_WRITE + 1 is RELEASE_LOCKOWNER. Maybe there was some older version of the spec in which that served as a sort of OP_ILLEGAL? No idea, but it's clearly wrong now. - In any case, I can't see that the spec says anything about what to do if the client sends us less ops than promised. It's clearly nutty client behavior, and we should do whatever's easiest: returning an xdr error (even though it won't be consistent with the error on the last op returned) seems fine to me. Signed-off-by: -
J. Bruce Fields authored
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J. Bruce Fields authored
Very embarassing: 1091006c "nfsd: turn on reply cache for NFSv4" missed a line, effectively leaving the reply cache off in the v4 case. I thought I'd tested that, but I guess not. This time, wrote a pynfs test to confirm it works. Cc: stable@vger.kernel.org Signed-off-by:
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- 15 Nov, 2012 7 commits
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Stanislav Kinsbursky authored
This patch moves laundromat_work to nfsd per-net context, thus allowing to run multiple laundries. Signed-off-by:
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Stanislav Kinsbursky authored
Passing net context looks as overkill. Signed-off-by:
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Stanislav Kinsbursky authored
This patch replaces init_net by SVC_NET(), where possible and also passes proper context to nested functions where required. Signed-off-by:
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Stanislav Kinsbursky authored
This list holds nfs4 clients (open) stateowner queue for last close replay, which are network namespace aware. So let's make this list per network namespace too. Signed-off-by:
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Stanislav Kinsbursky authored
This list holds nfs4 clients queue for lease renewal, which are network namespace aware. So let's make this list per network namespace too. Signed-off-by:
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Stanislav Kinsbursky authored
This hash holds established sessions state and closely associated with nfs4_clients info, which are network namespace aware. So let's make it allocated per network namespace too. Note: this hash can be allocated in per-net operations. But it looks better to allocate it on nfsd state start and thus don't waste resources if server is not running. Signed-off-by:
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Stanislav Kinsbursky authored
This hash holds file lock owners and closely associated with nfs4_clients info, which are network namespace aware. So let's make it allocated per network namespace too. Note: this hash can be allocated in per-net operations. But it looks better to allocate it on nfsd state start and thus don't waste resources if server is not running. Signed-off-by:
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