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Subject[PATCH 05/29] staging: lustre: libcfs: add debugging info for libcfs_ioctl
Date
From: Liang Zhen <liang.zhen@intel.com>

Added some lustre debugging to track down potential future
bugs.

Signed-off-by: Liang Zhen <liang.zhen@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5435
Reviewed-on: http://review.whamcloud.com/11313
Reviewed-by: Bobi Jam <bobijam@gmail.com>
Reviewed-by: Johann Lombardi <johann.lombardi@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
---
drivers/staging/lustre/lnet/libcfs/module.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/drivers/staging/lustre/lnet/libcfs/module.c b/drivers/staging/lustre/lnet/libcfs/module.c
index 8beb954..b7575af 100644
--- a/drivers/staging/lustre/lnet/libcfs/module.c
+++ b/drivers/staging/lustre/lnet/libcfs/module.c
@@ -121,8 +121,11 @@ static int libcfs_ioctl(struct cfs_psdev_file *pfile, unsigned long cmd,

/* 'cmd' and permissions get checked in our arch-specific caller */
err = libcfs_ioctl_getdata(&hdr, arg);
- if (err)
+ if (err) {
+ CDEBUG_LIMIT(D_ERROR,
+ "libcfs ioctl: data header error %d\n", err);
return err;
+ }

/*
* The libcfs_ioctl_data_adjust() function performs adjustment
@@ -137,6 +140,7 @@ static int libcfs_ioctl(struct cfs_psdev_file *pfile, unsigned long cmd,
goto out;
}

+ CDEBUG(D_IOCTL, "libcfs ioctl cmd %lu\n", cmd);
switch (cmd) {
case IOC_LIBCFS_CLEAR_DEBUG:
libcfs_debug_clear_buffer();
--
1.7.1
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