smb3: add dynamic tracepoints for simple fallocate and zero range

Can be helpful in debugging various xfstests that are currently
skipped or failing due to missing features in our current
implementation of fallocate.

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>

2 files changed, 38 insertions, 0 deletions

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index bd3d2288161c..823a58550dfd 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -2571,10 +2571,16 @@ static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
 	inode = d_inode(cfile->dentry);
 	cifsi = CIFS_I(inode);
 
+        trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
+			      ses->Suid, offset, len);
+
+
 	/* if file not oplocked can't be sure whether asking to extend size */
 	if (!CIFS_CACHE_READ(cifsi))
 		if (keep_size == false) {
 			rc = -EOPNOTSUPP;
+			trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
+				tcon->tid, ses->Suid, offset, len, rc);
 			free_xid(xid);
 			return rc;
 		}
@@ -2585,6 +2591,8 @@ static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
 	 */
 	if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
 		rc = -EOPNOTSUPP;
+		trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
+			      ses->Suid, offset, len, rc);
 		free_xid(xid);
 		return rc;
 	}
@@ -2644,6 +2652,12 @@ static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
 	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 	free_xid(xid);
+	if (rc)
+		trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
+			      ses->Suid, offset, len, rc);
+	else
+		trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
+			      ses->Suid, offset, len);
 	return rc;
 }
 
@@ -2698,9 +2712,13 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
 	inode = d_inode(cfile->dentry);
 	cifsi = CIFS_I(inode);
 
+	trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
+				tcon->ses->Suid, off, len);
 	/* if file not oplocked can't be sure whether asking to extend size */
 	if (!CIFS_CACHE_READ(cifsi))
 		if (keep_size == false) {
+			trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
+				tcon->tid, tcon->ses->Suid, off, len, rc);
 			free_xid(xid);
 			return rc;
 		}
@@ -2720,6 +2738,12 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
 		/* BB: in future add else clause to extend file */
 		else
 			rc = -EOPNOTSUPP;
+		if (rc)
+			trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
+				tcon->tid, tcon->ses->Suid, off, len, rc);
+		else
+			trace_smb3_falloc_done(xid, cfile->fid.persistent_fid,
+				tcon->tid, tcon->ses->Suid, off, len);
 		free_xid(xid);
 		return rc;
 	}
@@ -2735,6 +2759,8 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
 		 */
 		if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
 			rc = -EOPNOTSUPP;
+			trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
+				tcon->tid, tcon->ses->Suid, off, len, rc);
 			free_xid(xid);
 			return rc;
 		}
@@ -2743,6 +2769,12 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
 	}
 	/* BB: else ... in future add code to extend file and set sparse */
 
+	if (rc)
+		trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
+				tcon->ses->Suid, off, len, rc);
+	else
+		trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
+				tcon->ses->Suid, off, len);
 
 	free_xid(xid);
 	return rc;
diff --git a/fs/cifs/trace.h b/fs/cifs/trace.h
index 30bf51c7e8fe..fa226de48ef3 100644
--- a/fs/cifs/trace.h
+++ b/fs/cifs/trace.h
@@ -59,6 +59,8 @@ DEFINE_EVENT(smb3_rw_err_class, smb3_##name,    \
 DEFINE_SMB3_RW_ERR_EVENT(write_err);
 DEFINE_SMB3_RW_ERR_EVENT(read_err);
 DEFINE_SMB3_RW_ERR_EVENT(query_dir_err);
+DEFINE_SMB3_RW_ERR_EVENT(zero_err);
+DEFINE_SMB3_RW_ERR_EVENT(falloc_err);
 
 
 /* For logging successful read or write */
@@ -104,9 +106,13 @@ DEFINE_EVENT(smb3_rw_done_class, smb3_##name,   \
 DEFINE_SMB3_RW_DONE_EVENT(write_enter);
 DEFINE_SMB3_RW_DONE_EVENT(read_enter);
 DEFINE_SMB3_RW_DONE_EVENT(query_dir_enter);
+DEFINE_SMB3_RW_DONE_EVENT(zero_enter);
+DEFINE_SMB3_RW_DONE_EVENT(falloc_enter);
 DEFINE_SMB3_RW_DONE_EVENT(write_done);
 DEFINE_SMB3_RW_DONE_EVENT(read_done);
 DEFINE_SMB3_RW_DONE_EVENT(query_dir_done);
+DEFINE_SMB3_RW_DONE_EVENT(zero_done);
+DEFINE_SMB3_RW_DONE_EVENT(falloc_done);
 
 /*
  * For handle based calls other than read and write, and get/set info