lkml.org 
[lkml]   [2018]   [Sep]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH 06/34] vfs: Introduce logging functions [ver #12]
From
Date
Introduce a set of logging functions through which informational messages,
warnings and error messages incurred by the mount procedure can be logged
and, in a future patch, passed to userspace instead by way of the
filesystem configuration context file descriptor.

There are four functions:

(1) infof(const char *fmt, ...);

Logs an informational message.

(2) warnf(const char *fmt, ...);

Logs a warning message.

(3) errorf(const char *fmt, ...);

Logs an error message.

(4) invalf(const char *fmt, ...);

As errof(), but returns -EINVAL so can be used on a return statement.

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

include/linux/fs_context.h | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)

diff --git a/include/linux/fs_context.h b/include/linux/fs_context.h
index 56e406a96b80..4b7327852b7f 100644
--- a/include/linux/fs_context.h
+++ b/include/linux/fs_context.h
@@ -105,4 +105,46 @@ struct fs_context_operations {
int (*reconfigure)(struct fs_context *fc);
};

+#define logfc(FC, FMT, ...) pr_notice(FMT, ## __VA_ARGS__)
+
+/**
+ * infof - Store supplementary informational message
+ * @fc: The context in which to log the informational message
+ * @fmt: The format string
+ *
+ * Store the supplementary informational message for the process if the process
+ * has enabled the facility.
+ */
+#define infof(fc, fmt, ...) ({ logfc(fc, fmt, ## __VA_ARGS__); })
+
+/**
+ * warnf - Store supplementary warning message
+ * @fc: The context in which to log the error message
+ * @fmt: The format string
+ *
+ * Store the supplementary warning message for the process if the process has
+ * enabled the facility.
+ */
+#define warnf(fc, fmt, ...) ({ logfc(fc, fmt, ## __VA_ARGS__); })
+
+/**
+ * errorf - Store supplementary error message
+ * @fc: The context in which to log the error message
+ * @fmt: The format string
+ *
+ * Store the supplementary error message for the process if the process has
+ * enabled the facility.
+ */
+#define errorf(fc, fmt, ...) ({ logfc(fc, fmt, ## __VA_ARGS__); })
+
+/**
+ * invalf - Store supplementary invalid argument error message
+ * @fc: The context in which to log the error message
+ * @fmt: The format string
+ *
+ * Store the supplementary error message for the process if the process has
+ * enabled the facility and return -EINVAL.
+ */
+#define invalf(fc, fmt, ...) ({ errorf(fc, fmt, ## __VA_ARGS__); -EINVAL; })
+
#endif /* _LINUX_FS_CONTEXT_H */
\
 
 \ /
  Last update: 2018-09-21 18:31    [W:0.272 / U:0.128 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site