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
60 lines
1.5 KiB
ArmAsm
60 lines
1.5 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/linkage.h>
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#define R0 0x00
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#define R1 0x08
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#define R2 0x10
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#define R3 0x18
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#define R4 0x20
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#define R5 0x28
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#define R6 0x30
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#define R7 0x38
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#define R8 0x40
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#define R9 0x48
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#define SL 0x50
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#define FP 0x58
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#define IP 0x60
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#define SP 0x68
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#define LR 0x70
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#define PC 0x78
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/*
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* Implementation of void perf_regs_load(u64 *regs);
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*
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* This functions fills in the 'regs' buffer from the actual registers values,
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* in the way the perf built-in unwinding test expects them:
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* - the PC at the time at the call to this function. Since this function
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* is called using a bl instruction, the PC value is taken from LR.
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* The built-in unwinding test then unwinds the call stack from the dwarf
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* information in unwind__get_entries.
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*
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* Notes:
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* - the 8 bytes stride in the registers offsets comes from the fact
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* that the registers are stored in an u64 array (u64 *regs),
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* - the regs buffer needs to be zeroed before the call to this function,
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* in this case using a calloc in dwarf-unwind.c.
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*/
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.text
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.type perf_regs_load,%function
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ENTRY(perf_regs_load)
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str r0, [r0, #R0]
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str r1, [r0, #R1]
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str r2, [r0, #R2]
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str r3, [r0, #R3]
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str r4, [r0, #R4]
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str r5, [r0, #R5]
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str r6, [r0, #R6]
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str r7, [r0, #R7]
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str r8, [r0, #R8]
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str r9, [r0, #R9]
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str sl, [r0, #SL]
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str fp, [r0, #FP]
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str ip, [r0, #IP]
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str sp, [r0, #SP]
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str lr, [r0, #LR]
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str lr, [r0, #PC] // store pc as lr in order to skip the call
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// to this function
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mov pc, lr
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ENDPROC(perf_regs_load)
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