22 Dec, 2012
1 commit
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This reverts commit 79f77bf9a4e3dd5ead006b8f17e7c4ff07d8374e.
This is obviously wrong, and I have no idea how I missed seeing the
warning in testing: I must just not have looked at the right logs. The
caller bumps rq_resused/rq_next_page, so it will always be hit on a
large enough read.Reported-by: Dave Jones
Signed-off-by: J. Bruce Fields
Signed-off-by: Linus Torvalds
18 Dec, 2012
6 commits
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Note the stateid is hashed early on in init_stid(), but isn't currently
being unhashed on error paths.Signed-off-by: J. Bruce Fields
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Cc: Tigran Mkrtchyan
Signed-off-by: J. Bruce Fields -
It may be a matter of personal taste, but I find this makes the code
clearer.Signed-off-by: J. Bruce Fields
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As far as I can tell this shouldn't currently happen--or if it does,
something is wrong and data is going to be corrupted.Signed-off-by: J. Bruce Fields
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If the argument and reply together exceed the maximum payload size, then
a reply with a read-like operation can overlow the rq_pages array.Cc: stable@kernel.org
Signed-off-by: J. Bruce Fields -
To ensure ordering of read data with any following operations, turn off
zero copy if the read is not the final operation in the compound.Signed-off-by: J. Bruce Fields
11 Dec, 2012
20 commits
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If len == 0 we end up with size = (0 - 1), which could cause bad things
to happen in copy_from_user().Signed-off-by: Bryan Schumaker
Signed-off-by: J. Bruce Fields -
I honestly have no idea where I got 129 from, but it's a much bigger
value than the actual buffer size (INET6_ADDRSTRLEN).Signed-off-by: Bryan Schumaker
Signed-off-by: J. Bruce Fields -
Since NFSd service is per-net now, we have to pass proper network
context in nfsd_shutdown() from NFSd kthreads.The simplest way I found is to get proper net from one of transports
with permanent sockets.Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields -
Function nfsd_shutdown is called from two places: nfsd_last_thread (when last
kernel thread is exiting) and nfsd_svc (in case of kthreads starting error).
When calling from nfsd_svc(), we can be sure that per-net resources are
allocated, so we don't need to check per-net nfsd_net_up boolean flag.
This allows us to remove nfsd_shutdown function at all and move check for
per-net nfsd_net_up boolean flag to nfsd_last_thread.Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields -
Since we have generic NFSd resurces, we have to introduce some way how to
allocate and destroy those resources on first per-net NFSd start and on
last per-net NFSd stop respectively.
This patch replaces global boolean nfsd_up flag (which is unused now) by users
counter and use it to determine either we need to allocate generic resources
or destroy them.Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields -
This patch moves nfsd_startup_generic() and nfsd_shutdown_generic()
calls to nfsd_startup_net() and nfsd_shutdown_net() respectively, which
allows us to call nfsd_startup_net() instead of nfsd_startup() and makes
the code look clearer. It also modifies nfsd_svc() and nfsd_shutdown()
to check nn->nfsd_net_up instead of global nfsd_up. The latter is now
used only for generic resources shutdown and is currently useless. It
will replaced by NFSd users counter later in this series.Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields -
NFSd have per-net resources and resources, used globally.
Let's move generic resources init and shutdown to separated functions since
they are going to be allocated on first NFSd service start and destroyed after
last NFSd service shutdown.Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields -
This patch makes main step in NFSd containerisation.
There could be different approaches to how to make NFSd able to handle
incoming RPC request from different network namespaces. The two main
options are:1) Share NFSd kthreads betwween all network namespaces.
2) Create separated pool of threads for each namespace.While first approach looks more flexible, second one is simpler and
non-racy. This patch implements the second option.To make it possible to allocate separate pools of threads, we have to
make it possible to allocate separate NFSd service structures per net.Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields -
This is simple: an NFSd service can be started at different times in
different network environments. So, its "boot time" has to be assigned
per net.Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields -
This patch introduces introduces per-net "nfsd_net_up" boolean flag, which has
the same purpose as general "nfsd_up" flag - skip init or shutdown of per-net
resources in case of they are inited on shutted down respectively.Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields -
NFSd resources are partially per-net and partially globally used.
This patch splits resources init and shutdown and moves per-net code to
separated functions.
Generic and per-net init and shutdown are called sequentially for a while.Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields -
Precursor patch. Hard-coded "init_net" will be replaced by proper one in
future.Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields -
Precursor patch. Hard-coded "init_net" will be replaced by proper one in
future.Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields -
Precursor patch. Hard-coded "init_net" will be replaced by proper one in
future.Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields -
Precursor patch. Hard-coded "init_net" will be replaced by proper one in
future.Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields -
Precursor patch. Hard-coded "init_net" will be replaced by proper one in
future.Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields -
Precursor patch. Hard-coded "init_net" will be replaced by proper one in
future.Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields -
There could be a situation, when NFSd was started in one network namespace, but
stopped in another one.
This will trigger kernel panic, because RPCBIND client is stored on per-net
NFSd data, and will be NULL on NFSd shutdown.Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields -
With NFSv4, if we create a file then open it we explicit avoid checking
the permissions on the file during the open because the fact that we
created it ensures we should be allow to open it (the create and the
open should appear to be a single operation).However if the reply to an EXCLUSIVE create gets lots and the client
resends the create, the current code will perform the permission check -
because it doesn't realise that it did the open already..This patch should fix this.
Note that I haven't actually seen this cause a problem. I was just
looking at the code trying to figure out a different EXCLUSIVE open
related issue, and this looked wrong.(Fix confirmed with pynfs 4.0 test OPEN4--bfields)
Cc: stable@kernel.org
Signed-off-by: NeilBrown
[bfields: use OWNER_OVERRIDE and update for 4.1]
Signed-off-by: J. Bruce Fields -
Pointer to client tracking operations - client_tracking_ops - have to be
containerized, because different environment can support different trackers
(for example, legacy tracker currently is not suported in container).Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields
04 Dec, 2012
1 commit
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Fix nfsd4_lockt and release_lockowner to lookup the referenced client,
so that it can renew it, or correctly return "expired", as appropriate.Also share some code while we're here.
Reported-by: Frank Filz
Signed-off-by: J. Bruce Fields
03 Dec, 2012
10 commits
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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
Signed-off-by: J. Bruce Fields -
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: Bryan Schumaker
Signed-off-by: J. Bruce Fields -
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: Bryan Schumaker
Signed-off-by: J. Bruce Fields -
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: Bryan Schumaker
Signed-off-by: J. Bruce Fields -
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: Bryan Schumaker
Signed-off-by: J. Bruce Fields -
Using "forget_n_state()" forces me to implement the code needed to
forget a specific client's openowners.Signed-off-by: Bryan Schumaker
Signed-off-by: J. Bruce Fields -
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: Bryan Schumaker
Signed-off-by: J. Bruce Fields -
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: Bryan Schumaker
Signed-off-by: J. Bruce Fields -
Each function touches state in some way, so getting the lock earlier
can help simplify code.Signed-off-by: Bryan Schumaker
Signed-off-by: J. Bruce Fields -
Signed-off-by: J. Bruce Fields
29 Nov, 2012
1 commit
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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: Bryan Schumaker
Signed-off-by: J. Bruce Fields
28 Nov, 2012
1 commit
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Grace time is a part of NFSv4 state engine, which is constructed per network
namespace.Signed-off-by: Stanislav Kinsbursky
Signed-off-by: J. Bruce Fields