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
61 lines
2 KiB
C
61 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/futex.h>
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#ifndef FUTEX_WAIT_BITSET
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#define FUTEX_WAIT_BITSET 9
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#endif
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#ifndef FUTEX_WAKE_BITSET
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#define FUTEX_WAKE_BITSET 10
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#endif
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#ifndef FUTEX_WAIT_REQUEUE_PI
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#define FUTEX_WAIT_REQUEUE_PI 11
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#endif
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#ifndef FUTEX_CMP_REQUEUE_PI
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#define FUTEX_CMP_REQUEUE_PI 12
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#endif
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#ifndef FUTEX_CLOCK_REALTIME
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#define FUTEX_CLOCK_REALTIME 256
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#endif
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static size_t syscall_arg__scnprintf_futex_op(char *bf, size_t size, struct syscall_arg *arg)
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{
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enum syscall_futex_args {
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SCF_UADDR = (1 << 0),
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SCF_OP = (1 << 1),
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SCF_VAL = (1 << 2),
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SCF_TIMEOUT = (1 << 3),
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SCF_UADDR2 = (1 << 4),
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SCF_VAL3 = (1 << 5),
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};
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int op = arg->val;
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int cmd = op & FUTEX_CMD_MASK;
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size_t printed = 0;
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switch (cmd) {
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#define P_FUTEX_OP(n) case FUTEX_##n: printed = scnprintf(bf, size, #n);
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P_FUTEX_OP(WAIT); arg->mask |= SCF_VAL3|SCF_UADDR2; break;
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P_FUTEX_OP(WAKE); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
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P_FUTEX_OP(FD); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
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P_FUTEX_OP(REQUEUE); arg->mask |= SCF_VAL3|SCF_TIMEOUT; break;
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P_FUTEX_OP(CMP_REQUEUE); arg->mask |= SCF_TIMEOUT; break;
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P_FUTEX_OP(CMP_REQUEUE_PI); arg->mask |= SCF_TIMEOUT; break;
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P_FUTEX_OP(WAKE_OP); break;
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P_FUTEX_OP(LOCK_PI); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
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P_FUTEX_OP(UNLOCK_PI); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
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P_FUTEX_OP(TRYLOCK_PI); arg->mask |= SCF_VAL3|SCF_UADDR2; break;
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P_FUTEX_OP(WAIT_BITSET); arg->mask |= SCF_UADDR2; break;
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P_FUTEX_OP(WAKE_BITSET); arg->mask |= SCF_UADDR2; break;
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P_FUTEX_OP(WAIT_REQUEUE_PI); break;
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default: printed = scnprintf(bf, size, "%#x", cmd); break;
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}
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if (op & FUTEX_PRIVATE_FLAG)
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printed += scnprintf(bf + printed, size - printed, "|PRIV");
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if (op & FUTEX_CLOCK_REALTIME)
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printed += scnprintf(bf + printed, size - printed, "|CLKRT");
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return printed;
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}
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#define SCA_FUTEX_OP syscall_arg__scnprintf_futex_op
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