16c00db4bb
Pull AFS fixes from David Howells:
"Here's a set of patches that fix a number of bugs in the in-kernel AFS
client, including:
- Fix directory locking to not use individual page locks for
directory reading/scanning but rather to use a semaphore on the
afs_vnode struct as the directory contents must be read in a single
blob and data from different reads must not be mixed as the entire
contents may be shuffled about between reads.
- Fix address list parsing to handle port specifiers correctly.
- Only give up callback records on a server if we actually talked to
that server (we might not be able to access a server).
- Fix some callback handling bugs, including refcounting,
whole-volume callbacks and when callbacks actually get broken in
response to a CB.CallBack op.
- Fix some server/address rotation bugs, including giving up if we
can't probe a server; giving up if a server says it doesn't have a
volume, but there are more servers to try.
- Fix the decoding of fetched statuses to be OpenAFS compatible.
- Fix the handling of server lookups in Cache Manager ops (such as
CB.InitCallBackState3) to use a UUID if possible and to handle no
server being found.
- Fix a bug in server lookup where not all addresses are compared.
- Fix the non-encryption of calls that prevents some servers from
being accessed (this also requires an AF_RXRPC patch that has
already gone in through the net tree).
There's also a patch that adds tracepoints to log Cache Manager ops
that don't find a matching server, either by UUID or by address"
* tag 'afs-fixes-20180514' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
afs: Fix the non-encryption of calls
afs: Fix CB.CallBack handling
afs: Fix whole-volume callback handling
afs: Fix afs_find_server search loop
afs: Fix the handling of an unfound server in CM operations
afs: Add a tracepoint to record callbacks from unlisted servers
afs: Fix the handling of CB.InitCallBackState3 to find the server by UUID
afs: Fix VNOVOL handling in address rotation
afs: Fix AFSFetchStatus decoder to provide OpenAFS compatibility
afs: Fix server rotation's handling of fileserver probe failure
afs: Fix refcounting in callback registration
afs: Fix giving up callbacks on server destruction
afs: Fix address list parsing
afs: Fix directory page locking
74 lines
2.4 KiB
Text
74 lines
2.4 KiB
Text
perf-buildid-cache(1)
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=====================
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NAME
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----
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perf-buildid-cache - Manage build-id cache.
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SYNOPSIS
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--------
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[verse]
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'perf buildid-cache <options>'
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DESCRIPTION
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-----------
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This command manages the build-id cache. It can add, remove, update and purge
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files to/from the cache. In the future it should as well set upper limits for
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the space used by the cache, etc.
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This also scans the target binary for SDT (Statically Defined Tracing) and
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record it along with the buildid-cache, which will be used by perf-probe.
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For more details, see linkperf:perf-probe[1].
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OPTIONS
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-------
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-a::
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--add=::
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Add specified file to the cache.
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-f::
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--force::
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Don't complain, do it.
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-k::
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--kcore::
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Add specified kcore file to the cache. For the current host that is
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/proc/kcore which requires root permissions to read. Be aware that
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running 'perf buildid-cache' as root may update root's build-id cache
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not the user's. Use the -v option to see where the file is created.
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Note that the copied file contains only code sections not the whole core
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image. Note also that files "kallsyms" and "modules" must also be in the
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same directory and are also copied. All 3 files are created with read
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permissions for root only. kcore will not be added if there is already a
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kcore in the cache (with the same build-id) that has the same modules at
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the same addresses. Use the -v option to see if a copy of kcore is
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actually made.
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-r::
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--remove=::
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Remove a cached binary which has same build-id of specified file
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from the cache.
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-p::
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--purge=::
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Purge all cached binaries including older caches which have specified
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path from the cache.
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-M::
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--missing=::
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List missing build ids in the cache for the specified file.
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-u::
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--update=::
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Update specified file of the cache. Note that this doesn't remove
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older entires since those may be still needed for annotating old
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(or remote) perf.data. Only if there is already a cache which has
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exactly same build-id, that is replaced by new one. It can be used
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to update kallsyms and kernel dso to vmlinux in order to support
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annotation.
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-v::
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--verbose::
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Be more verbose.
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--target-ns=PID:
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Obtain mount namespace information from the target pid. This is
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used when creating a uprobe for a process that resides in a
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different mount namespace from the perf(1) utility.
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SEE ALSO
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--------
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linkperf:perf-record[1], linkperf:perf-report[1], linkperf:perf-buildid-list[1]
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