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
64 lines
2 KiB
Bash
Executable file
64 lines
2 KiB
Bash
Executable file
# probe libc's inet_pton & backtrace it with ping
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# Installs a probe on libc's inet_pton function, that will use uprobes,
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# then use 'perf trace' on a ping to localhost asking for just one packet
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# with the a backtrace 3 levels deep, check that it is what we expect.
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# This needs no debuginfo package, all is done using the libc ELF symtab
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# and the CFI info in the binaries.
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# Arnaldo Carvalho de Melo <acme@kernel.org>, 2017
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. $(dirname $0)/lib/probe.sh
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libc=$(grep -w libc /proc/self/maps | head -1 | sed -r 's/.*[[:space:]](\/.*)/\1/g')
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nm -g $libc 2>/dev/null | fgrep -q inet_pton || exit 254
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trace_libc_inet_pton_backtrace() {
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idx=0
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expected[0]="ping[][0-9 \.:]+probe_libc:inet_pton: \([[:xdigit:]]+\)"
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expected[1]=".*inet_pton[[:space:]]\($libc\)$"
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case "$(uname -m)" in
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s390x)
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eventattr='call-graph=dwarf,max-stack=4'
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expected[2]="gaih_inet.*[[:space:]]\($libc|inlined\)$"
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expected[3]="(__GI_)?getaddrinfo[[:space:]]\($libc|inlined\)$"
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expected[4]="main[[:space:]]\(.*/bin/ping.*\)$"
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;;
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*)
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eventattr='max-stack=3'
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expected[2]="getaddrinfo[[:space:]]\($libc\)$"
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expected[3]=".*\(.*/bin/ping.*\)$"
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;;
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esac
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file=`mktemp -u /tmp/perf.data.XXX`
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perf record -e probe_libc:inet_pton/$eventattr/ -o $file ping -6 -c 1 ::1 > /dev/null 2>&1
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perf script -i $file | while read line ; do
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echo $line
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echo "$line" | egrep -q "${expected[$idx]}"
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if [ $? -ne 0 ] ; then
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printf "FAIL: expected backtrace entry %d \"%s\" got \"%s\"\n" $idx "${expected[$idx]}" "$line"
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exit 1
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fi
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let idx+=1
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[ -z "${expected[$idx]}" ] && break
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done
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# If any statements are executed from this point onwards,
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# the exit code of the last among these will be reflected
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# in err below. If the exit code is 0, the test will pass
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# even if the perf script output does not match.
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}
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# Check for IPv6 interface existence
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ip a sh lo | fgrep -q inet6 || exit 2
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skip_if_no_perf_probe && \
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perf probe -q $libc inet_pton && \
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trace_libc_inet_pton_backtrace
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err=$?
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rm -f ${file}
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perf probe -q -d probe_libc:inet_pton
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exit $err
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