xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

afs: Provide mount-time configurable byte-range file locking emulation

Browse Source 
Provide byte-range file locking emulation that can be configured at mount
time to one of four modes:

 (1) flock=local.  Locking is done locally only and no reference is made to
     the server.

 (2) flock=openafs.  Byte-range locking is done locally only; whole-file
     locking is done with reference to the server.  Whole-file locks cannot
     be upgraded unless the client holds an exclusive lock.

 (3) flock=strict.  Byte-range and whole-file locking both require a
     sufficient whole-file lock on the server.

 (4) flock=write.  As strict, but the client always gets an exclusive
     whole-file lock on the server.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2019-04-25 14:26:52 +01:00
parent 80548b0399
commit 6c6c1d63c2
6 changed files with 120 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
include/trace/events/afs.h
View File

@@ -539,6 +539,41 @@ TRACE_EVENT(afs_make_fs_call,
__print_symbolic(__entry->op, afs_fs_operations))
);
TRACE_EVENT(afs_make_fs_calli,
TP_PROTO(struct afs_call *call, const struct afs_fid *fid,
unsigned int i),
TP_ARGS(call, fid, i),
TP_STRUCT__entry(
__field(unsigned int, call )
__field(unsigned int, i )
__field(enum afs_fs_operation, op )
__field_struct(struct afs_fid, fid )
),
TP_fast_assign(
__entry->call = call->debug_id;
__entry->i = i;
__entry->op = call->operation_ID;
if (fid) {
__entry->fid = *fid;
} else {
__entry->fid.vid = 0;
__entry->fid.vnode = 0;
__entry->fid.unique = 0;
}
),
TP_printk("c=%08x %06llx:%06llx:%06x %s i=%u",
__entry->call,
__entry->fid.vid,
__entry->fid.vnode,
__entry->fid.unique,
__print_symbolic(__entry->op, afs_fs_operations),
__entry->i)
);
TRACE_EVENT(afs_make_fs_call1,
TP_PROTO(struct afs_call *call, const struct afs_fid *fid,
const char *name),