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afs: Implement sillyrename for unlink and rename

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Implement sillyrename for AFS unlink and rename, using the NFS variant
implementation as a basis.

Note that the asynchronous file locking extender/releaser has to be
notified with a state change to stop it complaining if there's a race
between that and the actual file deletion.

A tracepoint, afs_silly_rename, is also added to note the silly rename and
the cleanup.  The afs_edit_dir tracepoint is given some extra reason
indicators and the afs_flock_ev tracepoint is given a silly-delete file
lock cancellation indicator.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2019-04-25 14:26:51 +01:00
parent 99987c5600
commit 79ddbfa500
8 changed files with 395 additions and 13 deletions
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34
include/trace/events/afs.h
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@@ -108,8 +108,12 @@ enum afs_edit_dir_reason {
afs_edit_dir_for_create,
afs_edit_dir_for_link,
afs_edit_dir_for_mkdir,
afs_edit_dir_for_rename,
afs_edit_dir_for_rename_0,
afs_edit_dir_for_rename_1,
afs_edit_dir_for_rename_2,
afs_edit_dir_for_rmdir,
afs_edit_dir_for_silly_0,
afs_edit_dir_for_silly_1,
afs_edit_dir_for_symlink,
afs_edit_dir_for_unlink,
};
@@ -161,6 +165,7 @@ enum afs_flock_event {
afs_flock_fail_perm,
afs_flock_no_lockers,
afs_flock_release_fail,
afs_flock_silly_delete,
afs_flock_timestamp,
afs_flock_try_to_lock,
afs_flock_vfs_lock,
@@ -273,8 +278,12 @@ enum afs_flock_operation {
EM(afs_edit_dir_for_create, "Create") \
EM(afs_edit_dir_for_link, "Link ") \
EM(afs_edit_dir_for_mkdir, "MkDir ") \
EM(afs_edit_dir_for_rename, "Rename") \
EM(afs_edit_dir_for_rename_0, "Renam0") \
EM(afs_edit_dir_for_rename_1, "Renam1") \
EM(afs_edit_dir_for_rename_2, "Renam2") \
EM(afs_edit_dir_for_rmdir, "RmDir ") \
EM(afs_edit_dir_for_silly_0, "S_Ren0") \
EM(afs_edit_dir_for_silly_1, "S_Ren1") \
EM(afs_edit_dir_for_symlink, "Symlnk") \
E_(afs_edit_dir_for_unlink, "Unlink")
@@ -337,6 +346,7 @@ enum afs_flock_operation {
EM(afs_flock_fail_perm, "ErrPerm ") \
EM(afs_flock_no_lockers, "NoLocker") \
EM(afs_flock_release_fail, "Rel_Fail") \
EM(afs_flock_silly_delete, "SillyDel") \
EM(afs_flock_timestamp, "Timestmp") \
EM(afs_flock_try_to_lock, "TryToLck") \
EM(afs_flock_vfs_lock, "VFSLock ") \
@@ -964,6 +974,26 @@ TRACE_EVENT(afs_reload_dir,
__entry->fid.vid, __entry->fid.vnode, __entry->fid.unique)
);
TRACE_EVENT(afs_silly_rename,
TP_PROTO(struct afs_vnode *vnode, bool done),
TP_ARGS(vnode, done),
TP_STRUCT__entry(
__field_struct(struct afs_fid, fid )
__field(bool, done )
),
TP_fast_assign(
__entry->fid = vnode->fid;
__entry->done = done;
),
TP_printk("%llx:%llx:%x done=%u",
__entry->fid.vid, __entry->fid.vnode, __entry->fid.unique,
__entry->done)
);
#endif /* _TRACE_AFS_H */
/* This part must be outside protection */