(1) fixes a bug that could cause a 'host' structure to not be removed
from the global host list if the 'host' did not possess an interface
list. This would happen with older AFS clients that do not support the
WhoAreYou family of RPCs. Windows clients older than 1.3.80 and old
Transarc UNIX clients.
(2) fixes a bug which could result in ViceLog being called with an
uninitialized 'hoststr' buffer as a parameter.
(3) ensures that only addresses known to belong to the 'host' are
added to the address hash table. The list of addresses provided by
the client are stored as alternates and are only used when searching
for a client that is no longer accessible on the primary address.
These addresses are not stored in the address hash table within
initInterfaceAddr_r().
The addresses provided by the client should not be added to the hash
table because they have not been verified as belonging to the 'host'
that provided them. The contents of the list may in fact be completely
unreliable. Consider the existing UNIX clients that generate the list
at startup and never alter it even after the client has migrated to a
different network. If two client's both claim the same address,
lookups by address may fail to find the correct one.
a. The client list might contain private address ranges which
are likely to be re-used by many clients allocated addresses
by a NAT.
b. The client list will not include any public addresses that
are hidden by a NAT.
c. Private address ranges that are exposed to the server will
be obtained from the rx connections that use them.
d. Lists provided by the client are not necessarily truthful.
Many existing clients (UNIX) do not refresh the IP address
list as the actual assigned addresses change. The end result
is that they report the initial address list for the lifetime
of the process. In other words, a client can report addresses
that they are in fact not using. Adding these addresses to
the host interface list without verification is not only
pointless, it is downright dangerous.
e. The reported addresses do not include port numbers and
guessing that the port number is 7001 does not work when
port mapping devices such as NATs or some VPNs are in
use.
(4) improves logging to ensure that all references to a 'host' structure
report both a memory address and the IP address/port. this will avoid
confusion *if* more than one 'host' structure is assigned the same
primary address.
(5) logs the UUID along with the client addresses when initializing the
host's interface list. (level 125)
(6) saves memory by using a smaller structure for the UUID hash table
MultiProbeAlternateAddress_r badly indexes the list of interfaces for
clients with multiple IP interfaces, resulting in peers with IP
address 0 port 0 to be created. This in turn results in rxi_sendmsg
errors (on systems where caught early, as on Linux, on others it may
pass unnoticed).
Add a new fs newalias man page. Add -help to the synopsis and options of
the other new man pages. Add additional missing links in the fs man page.
Fix some wording in the CellAlias man page.
Complete the documentation of the afsd flags and update a few things like
-settime and -nosettime. Add man pages for fs setcrypt, fs getcrypt, and
CellAlias. Based on work by Jason Edgecombe and then extensively edited,
so any errors I probably introduced.
The windows cache manager has suffered from poor performance as a result
of Create, Rename, and Delete operations because they invalidate the
contents of the directory pages in the cache thereby forcing them to be
reloaded from the file server. As the directory size increases, the clock
time necessary to perform the reload increases.
This delta adds support for parsing and updating the AFS3 directory buffers
to cm_dir.c. It then uses that functionality to perform local updates to
the directory buffers whenever the following conditions are met:
1. the data version on the directory as a result of the change
was incremented by one.
2. all of the directory buffers required for the update are in
the cache.
If these conditions are not met, the directory is reloaded from the file
server.
The windows cache manager has suffered from poor performance as a result
of Create, Rename, and Delete operations because they invalidate the
contents of the directory pages in the cache thereby forcing them to be
reloaded from the file server. As the directory size increases, the clock
time necessary to perform the reload increases.
This delta adds support for parsing and updating the AFS3 directory buffers
to cm_dir.c. It then uses that functionality to perform local updates to
the directory buffers whenever the following conditions are met:
1. the data version on the directory as a result of the change
was incremented by one.
2. all of the directory buffers required for the update are in
the cache.
If these conditions are not met, the directory is reloaded from the file
server.
if all of the servers are down when a callback is due to expire
delay the expiration until at least one server is available.
this prevents some applications that are running when the CM
is off the network from failing if their pages are swapped out.
Mention aklog and kinit in klog's man page, add -dynroot to the afsd man
page, and mention that -skipauth tells uss not to create any Kerberos
principal and this has to be done separately.
This delta adds an interface to an optional volume status handler.
The handler (if provided) receives status updates when volumes
change state between online, offline, busy, and alldown.
The UNIX client does not follow mount points or symlinks when evaluating
ioctl paths during commands such as "fs examine". The Windows client did
which was annoying when you wanted to know the FID of a mount point that
was not properly being evaluated.
Since the library creates its own background thread, the library must
load its own reference to itself to prevent the library from being
unloaded behind its back.
remove the conditionalized code used to give up callbacks in response
to stat cache recycling due to performance impacts described in the
commit for DELTA windows-give-up-callbacks-20070627
This large patch adds support for giving up callbacks in response to three
events:
1. power management suspend
2. power management shutdown
3. stat cache object recycling
The third item is submitted as a condition compilation if GIVE_UP_CALLBACKS
is defined. Properly handing callback give ups and the associated race
conditions with revokes and fetch status requests requires a great deal of
over head. The first attempt used one GiveUpCallBacks RPC for each callback
that was being dropped as the stat cache object was recycled. This resulted
in a 27% performance drop in the MIT stress test. The code that is being
committed maintains a callback give up list on each server object. The
callback is added to the list as the callbacks are dropped and then they
are sent to the server in bulk by the background daemon thread if the
server is known to be UP after a ping. Logic is added to the
EndCallbackRequest and CallbackRevoke operations to ensure that race
conditions are addressed. With all of this, there is a 17% performance drop
in the MIT stress test.
As a result, it is my conclusion that the client side costs associated with
optimizing the load on the server are simply too high. I am committing this
code to ensure that it is not lost. I will remove this support in the next
patch while leaving the support for giving up all callbacks in response
to suspend and shutdown events.
====================
This delta was composed from multiple commits as part of the CVS->Git migration.
The checkin message with each commit was inconsistent.
The following are the additional commit messages.
====================
return an error when the cm_fid_t * is NULL since we can't look up
the volume to obtain a server list without knowing which volume we
should be looking up
if the fidp is known to be NULL, don't call cm_GetServerList()
2.6.21.1 introduces an additional .parent pointer in the middle of
the structure. As the OpenAFS code just initialises the structure
with a list, this causes it to assign the value intended
for .proc_handler to .parent
Add name and ID hash tables for cell lookups. cell lookups occur on
every request. sometimes multiple times. removing the walking of the
cell list when there are dozens of cells decreases cpu utilization and
increases throughput.
====================
This delta was composed from multiple commits as part of the CVS->Git migration.
The checkin message with each commit was inconsistent.
The following are the additional commit messages.
====================
another fix for index.htm. point at relnotes_frames.htm instead of frames.htm
there were two sets of registry values that could be used to configure
the daemon thread check intervals. keep the one that was documented
in the release notes and discard the other.
Add a registry value "daemonCheckOfflineVolInterval" to configure the
offline volume check interval.
Ensure that the cm_GetConn... functions initialized the output variables
to NULL on error.
When we are faking the status data we can use the vnode value to determine
if the object should be treated as a directory or file. even is a directory
and odd is a file. This works even when we have never successfully
obtained status data for the object.
If the we can match up the host address from which the revoke was received
with one of our cm_server_t objects, then we know which cell the revoke
has been received from. With that information we can ensure that we only
revoke the status of cm_scache_t objects belonging to that cell.
Reverse the order of the allCellsp list. Append new cells onto the end
of the list. This ensures that the workstation cell will always be the
first in the list. Adding additional cells will not degrade the performance
to the workstation cell.
No longer permit cm_GetCell() or cm_FindCellByID() to return NULL simply
because cm_UpdateCell() failed. The cm_cell_t object still exists and
is valid even if the vlServersp list is empty.
Modify the lock management in cm_GetCell_Gen() to ensure we drop all the
locks.
In cm_Analyze() update the volume status when one of the servers reports
VBUSY or VRESTARTING.
projects / packages / o / openafs.git / log