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
47 lines
1 KiB
C
47 lines
1 KiB
C
/*
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* bpf-script-test-prologue.c
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* Test BPF prologue
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*/
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#ifndef LINUX_VERSION_CODE
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# error Need LINUX_VERSION_CODE
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# error Example: for 4.2 kernel, put 'clang-opt="-DLINUX_VERSION_CODE=0x40200" into llvm section of ~/.perfconfig'
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#endif
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#define SEC(NAME) __attribute__((section(NAME), used))
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#include <uapi/linux/fs.h>
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/*
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* If CONFIG_PROFILE_ALL_BRANCHES is selected,
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* 'if' is redefined after include kernel header.
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* Recover 'if' for BPF object code.
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*/
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#ifdef if
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# undef if
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#endif
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#define FMODE_READ 0x1
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#define FMODE_WRITE 0x2
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static void (*bpf_trace_printk)(const char *fmt, int fmt_size, ...) =
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(void *) 6;
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SEC("func=null_lseek file->f_mode offset orig")
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int bpf_func__null_lseek(void *ctx, int err, unsigned long _f_mode,
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unsigned long offset, unsigned long orig)
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{
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fmode_t f_mode = (fmode_t)_f_mode;
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if (err)
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return 0;
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if (f_mode & FMODE_WRITE)
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return 0;
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if (offset & 1)
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return 0;
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if (orig == SEEK_CUR)
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return 0;
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return 1;
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}
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char _license[] SEC("license") = "GPL";
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int _version SEC("version") = LINUX_VERSION_CODE;
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