afs: Add more tracepoints

Add four more tracepoints:

 (1) afs_make_fs_call1 - Split from afs_make_fs_call but takes a filename
     to log also.

 (2) afs_make_fs_call2 - Like the above but takes two filenames to log.

 (3) afs_lookup - Log the result of doing a successful lookup, including a
     negative result (fid 0:0).

 (4) afs_get_tree - Log the set up of a volume for mounting.

It also extends the name buffer on the afs_edit_dir tracepoint to 24 chars
and puts quotes around the filename in the text representation.

Signed-off-by: David Howells <dhowells@redhat.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 6c8523501639..48706eefc63b 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -908,8 +908,14 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
 			(void *)(unsigned long)dvnode->status.data_version;
 	}
 	d = d_splice_alias(inode, dentry);
-	if (!IS_ERR_OR_NULL(d))
+	if (!IS_ERR_OR_NULL(d)) {
 		d->d_fsdata = dentry->d_fsdata;
+		trace_afs_lookup(dvnode, &d->d_name,
+				 inode ? AFS_FS_I(inode) : NULL);
+	} else {
+		trace_afs_lookup(dvnode, &dentry->d_name,
+				 inode ? AFS_FS_I(inode) : NULL);
+	}
 	return d;
 }