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The second r/o opener of a file is supposed to get a level2 oplock. The first
opener due to the protection in process_oplock_break_message() has been forced
to break to no oplock. The second opener according to locking.tdb gets a level2
oplock. Further down in open_file_ntcreate we try to set this level2 oplock in
the kernel, and the non-clustered Linux kernel disallows this. The rules for
the kernel leases are a bit baroque, but the attempt to do the SETLEASE
correctly fails and we end up with no oplock for any client.
In the clustered case however the linux kernel on the second opening node has
not seen the open fd of the first node, it is only the cluster fs that has this
information. If the cluster fs does not have the very same notion of leases as
the local kernel has, we can end up with a WRLCK style kernel lease for the
second opener where locking.tdb only indicates a level2 oplock. Getting a
kernel oplock break signal with just a level2 oplock in locking.tdb is
something smbd is not prepared for. For example after sending out the break in
response to the kernel signal we set a timeout, waiting for a reply.
More work needs to be done to make level2 kernel oplocks real for us. This
patch addresses a real problem we have right now without them.
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We keep the seqnum/mid mapping in the smb_request structure.
This also moves one global variable into the
smbd_server_connection struct.
metze
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This extends the file_id struct to add an additional generic uint64_t
field: extid. For backwards compatibility with dev/inodes stored in
xattr_tdbs and acl_tdbs, the ext id is ignored for these databases.
This patch should cause no functional change on systems that don't use
SMB_VFS_FILE_ID_CREATE to set the extid.
Existing code that uses the smb_share_mode library will need to be
updated to be compatibile with the new extid.
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A few functions in oplocks_onefs.c need to be accessed from the onefs
vfs module. It would be ideal if oplocks were implemented at the vfs
layer, but since they aren't yet, a new header is added to
source3/include to make these functions available to the onefs vfs
module. oplocks_onefs.o doesn't need to be linked into the onefs vfs
module explicitly, since it is already linked into smbd by default.
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Here is a short description for each of the new capability flags:
KOPLOCKS_LEVEL2_SUPPORTED: Level 2 oplocks are supported natively in
the kernel.
KOPLOCKS_DEFERRED_OPEN_NOTIFICATION: The kernel notifies deferred
openers when they can retry the open.
KOPLOCKS_TIMEOUT_NOTIFICATION: The kernel notifies smbds when an
oplock break times out.
KOPLOCKS_OPLOCK_BROKEN_NOTIFICATION: The kernel notifies smbds when an
oplock is broken.
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This replaces release_level2_oplocks_on_change with
contend_level2_oplock_begin/end in order to contend level2 oplocks
throughout an operation rather than just at the begining. This is
necessary for some kernel oplock implementations, and also lays the
groundwork for better correctness in Samba's standard level2 oplock
handling. The next step for non-kernel oplocks is to add additional
state to the share mode lock struct that prevents any new opens from
granting oplocks while a contending operation is in progress.
All operations that contend level 2 oplocks are now correctly spanned
except for aio and synchronous writes. The two write paths both have
non-trivial error paths that need extra care to get right.
RAW-OPLOCK and the rest of 'make test' are still passing with this
change.
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Level 2 for kernel oplocks
Pass in an extra argument when releasing an oplock so kernel oplock
implementations can support downgrading from Level 1 to Level 2.
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This changelist allows for the addition of custom performance
monitoring modules through smb.conf. Entrypoints in the main message
processing code have been added to capture the command, subop, ioctl,
identity and message size statistics.
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And use signal events for Linux oplocks.
metze
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This converts the irix oplocks code to use a fd event
and removes the last special case for file descriptors
for the main sys_select().
metze
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The goal is to move all this variables into a big context structure.
metze
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metze
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notify to be missed.
Jeremy.
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Jeremy.
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Jeremy.
(This used to be commit 7eeed8bb41059ec2bddedb6a71deddeec7f33af2)
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This is needed to implement the strange write time update
logic later. We need to store 2 time timestamps to
distinguish between the time the file system had before
the first client opened the file and a forced timestamp update.
metze
(This used to be commit 6aaa2ce0eeb46f6735ec984a2e7aadde7a7f456d)
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(This used to be commit 65dd869bea351010c67f02046ae4134bdada1a4c)
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with Volker. Mostly making sure we have data on the incoming
packet type, not stored in the smb header.
Jeremy.
(This used to be commit c4e5a505043965eec77b5bb9bc60957e8f3b97c8)
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oplock breaks can't be encrypted. If we have multiple
contexts I should probably attach them to the connection
struct, but for now use the global context number.
Jeremy.
(This used to be commit 5b4b335ed0d1dc738f1f099e5c638361f3aede07)
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negotiation works.
Jeremy.
(This used to be commit d78045601af787731f0737b8627450018902b104)
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it with accessor functions. "One global or pstring a day...." :-).
Jeremy.
(This used to be commit d50d14c300abc83b7015718ec48acc8b3227a273)
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bugs in various places whilst doing this (places that assumed
BOOL == int). I also need to fix the Samba4 pidl generation
(next checkin).
Jeremy.
(This used to be commit f35a266b3cbb3e5fa6a86be60f34fe340a3ca71f)
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(This used to be commit 5c6c8e1fe93f340005110a7833946191659d88ab)
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This removes file_id_string_static and file_id_string_static2
(This used to be commit 638c848c9afe374feb30e34c494f89b2a6c64f7b)
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(This used to be commit b0132e94fc5fef936aa766fb99a306b3628e9f07)
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Jeremy.
(This used to be commit 407e6e695b8366369b7c76af1ff76869b45347b3)
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on fsp close or removal of oplock. Mulitple removals
are safe.
Jeremy.
(This used to be commit 6de0970704b3eff2b71e6bf499c6dda45d4d5e2d)
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I'm 100% certain I've forgotten to merge something, but the main code
should be in. It's mainly in dbwrap_ctdb.c, ctdbd_conn.c and
messages_ctdbd.c.
There should be no changes to the non-cluster case, it does survive make
test on my laptop.
It survives some very basic tests with ctdbd enables, I did not do the
full test suite for clusters yet.
Phew...
Volker
(This used to be commit 15553d6327a3aecdd2b0b94a3656d04bf4106323)
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This replaces the internal explicit dev/ino file id representation by a
"struct file_id". This is necessary as cluster file systems and NFS
don't necessarily assign the same device number to the shared file
system. With this structure in place we can now easily add different
schemes to map a file to a unique 64-bit device node.
Jeremy, you might note that I did not change the external interface of
smb_share_modes.c.
Volker
(This used to be commit 9b10dbbd5de8813fc15ebbb6be9b18010ffe8139)
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tomorrow.
(This used to be commit 74fa57ca5d7fa8eace72bbe948a08a0bca3cc4ca)
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patch.
This changes "struct process_id" to "struct server_id", keeping both is
just too much hassle. No functional change (I hope ;-))
Volker
(This used to be commit 0ad4b1226c9d91b72136310d3bbb640d2c5d67b8)
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to all callers of smb_setlen (via set_message()
calls). This will allow the server to reflect back
the correct encryption context.
Jeremy.
(This used to be commit 2d80a96120a5fe2fe726f00746d36d85044c4bdb)
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Move more error code returns to NTSTATUS.
Client test code to follow... See if this
passes the build-farm before I add it into
3.0.25.
Jeremy.
(This used to be commit 83dbbdff345fa9e427c9579183f4380004bf3dd7)
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void message_register(int msg_type,
void (*fn)(int msg_type, struct process_id pid,
- void *buf, size_t len))
+ void *buf, size_t len,
+ void *private_data),
+ void *private_data)
{
struct dispatch_fns *dfn;
So this adds a (so far unused) private pointer that is passed from
message_register to the message handler. A prerequisite to implement a tiny
samba4-API compatible wrapper around our messaging system. That itself is
necessary for the Samba4 notify system.
Yes, I know, I could import the whole Samba4 messaging system, but I want to
do it step by step and I think getting notify in is more important in this
step.
Volker
(This used to be commit c8ae60ed65dcce9660ee39c75488f2838cf9a28b)
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This add a struct event_context and infrastructure for fd events to smbd. This
is step zero to import lib/events.
Jeremy, I rely on you to watch the change in receive_message_or_smb()
closely. For the normal code path this should be the only relevant change. The
rest is either not yet used or is cosmetic.
Volker
(This used to be commit cd07f93a8aecb24c056e33b1ad3447a41959810f)
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send_smb failures should be clean exits. All times when we exit as
a matter of policy should also be clean exits.
(This used to be commit d6382092e72120a3c89ffe81975e8898d454bf06)
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removed immediately in the handler.
Extra debug info tracking down winbindd DC
selection.
Jeremy.
(This used to be commit 7ba9b6ce588f716589e9f88ed146fad36c4b3758)
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(This used to be commit e4b8c79a9d6f7323953121887af4f482d04a9228)
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fix the messaging code to call the efficient calls :
save_re_uid()
set_effective_uid(0);
messaging_op
restore_re_uid();
instead of using heavyweight become_root()/unbecome_root()
pairs around all messaging code. Fixup the messaging
code to ensure sec_init() is called (only once) so that non-root
processes still work when sending messages.
This is a lighter weight solution to become_root()/unbecome_root()
(which swaps all the supplemental groups) and should be more
efficient. I will migrate all server code over to using this
(a similar technique should be used in the passdb backend
where needed).
Jeremy.
(This used to be commit 4ace291278d9a44f5c577bdd3b282c1231e543df)
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(This used to be commit 40e267981174840f4f36d1863985ee010ef5074a)
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share_mode struct. Allows us to know the unix
uid of the opener of the file/directory. Needed
for info level queries on open files.
Jeremy.
(This used to be commit d929323d6f513902381369d77bcd7b714346d713)
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This allows a requestor to set FORCE_OPLOCK_BREAK_TO_NONE
to ensure we don't break to level 2. Fixed a couple
of resource leaks in error paths in open_file_ntcreatex.
Jeremy.
(This used to be commit c7c9adcce7f13d01445f31b07fb28a76f0a1d6df)
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fsp pointers. Ensure we cope with this to pass Samba4
DENY tests (we used to pass these, there must have been
a regression with newer code). We now pass them.
Jeremy
(This used to be commit fd6fa1d4eaf61783df74ee2da50d331477f06998)
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consistent. Bring oplocks withing the purview of the locking debug
channel.
(This used to be commit e817cfd7d3a42d141198122eada58b5a7ba90e9c)
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packet processing code. Only do these when needed (ie. in the
idle timeout code). We drop an unneccessary global here too.
Jeremy.
(This used to be commit 8272a5ab0605fcf95527143c4f909aa1008e5b94)
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still
lurking...
Volker
(This used to be commit 1345a52794f4f55173ed677af3d0714e88bf17c6)
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