[Ocfs2-devel] [PATCH 3/5] Generate uevents for errors

[Goldwyn Rodrigues <rgoldwyn@suse.de>]

From: Goldwyn Rodrigues <rgoldwyn@suse.com>

Errors are reported to the userspace using the kobject we just added.
This can be used to automate checks and fixes using udev scripts

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
---
 fs/ocfs2/inode.c | 13 +++++++++++++
 fs/ocfs2/sysfs.c | 17 +++++++++++++++++
 fs/ocfs2/sysfs.h |  2 ++
 3 files changed, 32 insertions(+)

diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index 12f4a9e..a6cfe5d 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -54,6 +54,7 @@
 #include "refcounttree.h"
 #include "ocfs2_trace.h"
 #include "filecheck.h"
+#include "sysfs.h"
 
 #include "buffer_head_io.h"
 
@@ -1412,6 +1413,9 @@ int ocfs2_validate_inode_block(struct super_block *sb,
 		rc = ocfs2_error(sb, "Invalid dinode #%llu: signature = %.*s\n",
 				 (unsigned long long)bh->b_blocknr, 7,
 				 di->i_signature);
+		ocfs2_report_error(OCFS2_SB(sb), (unsigned long long)bh->b_blocknr,
+				(unsigned long long)bh->b_blocknr,
+				rc);
 		goto bail;
 	}
 
@@ -1419,6 +1423,9 @@ int ocfs2_validate_inode_block(struct super_block *sb,
 		rc = ocfs2_error(sb, "Invalid dinode #%llu: i_blkno is %llu\n",
 				 (unsigned long long)bh->b_blocknr,
 				 (unsigned long long)le64_to_cpu(di->i_blkno));
+		ocfs2_report_error(OCFS2_SB(sb), (unsigned long long)bh->b_blocknr,
+				(unsigned long long)bh->b_blocknr,
+				rc);
 		goto bail;
 	}
 
@@ -1426,6 +1433,9 @@ int ocfs2_validate_inode_block(struct super_block *sb,
 		rc = ocfs2_error(sb,
 				 "Invalid dinode #%llu: OCFS2_VALID_FL not set\n",
 				 (unsigned long long)bh->b_blocknr);
+		ocfs2_report_error(OCFS2_SB(sb), (unsigned long long)bh->b_blocknr,
+				(unsigned long long)bh->b_blocknr,
+				rc);
 		goto bail;
 	}
 
@@ -1435,6 +1445,9 @@ int ocfs2_validate_inode_block(struct super_block *sb,
 				 "Invalid dinode #%llu: fs_generation is %u\n",
 				 (unsigned long long)bh->b_blocknr,
 				 le32_to_cpu(di->i_fs_generation));
+		ocfs2_report_error(OCFS2_SB(sb), (unsigned long long)bh->b_blocknr,
+				(unsigned long long)bh->b_blocknr,
+				rc);
 		goto bail;
 	}
 
diff --git a/fs/ocfs2/sysfs.c b/fs/ocfs2/sysfs.c
index db4315b..5632d14 100644
--- a/fs/ocfs2/sysfs.c
+++ b/fs/ocfs2/sysfs.c
@@ -126,6 +126,23 @@ static ssize_t file_check_max_entries_store(struct ocfs2_super *osb,
 	return count;
 }
 
+void ocfs2_report_error(struct ocfs2_super *osb, unsigned long long ino,
+			unsigned long long blkno, int errno)
+{
+	char event_name[] = "EVENT=FS_ERROR";
+	char device[16];
+	char inode_number[16];
+	char error_number[16];
+	char block_number[16];
+	char *envp[] = {event_name, inode_number, error_number, block_number,
+		NULL};
+	snprintf(device, 16, "DEVICE=%s", osb->sb->s_id);
+	snprintf(error_number, 16, "ERROR=%d", errno);
+	snprintf(inode_number, 16, "INODE=%llu", ino);
+	snprintf(block_number, 16, "BLOCK=%llu", blkno);
+	kobject_uevent_env(&osb->kobj, KOBJ_CHANGE, envp);
+}
+
 static void sb_release(struct kobject *kobj)
 {
 	struct ocfs2_super *osb = container_of(kobj, struct ocfs2_super, kobj);
diff --git a/fs/ocfs2/sysfs.h b/fs/ocfs2/sysfs.h
index d929ac1..0383ee3 100644
--- a/fs/ocfs2/sysfs.h
+++ b/fs/ocfs2/sysfs.h
@@ -3,6 +3,8 @@
 #ifndef _SYS_H
 #define _SYS_H
 
+void ocfs2_report_error(struct ocfs2_super *osb, unsigned long long ino,
+		unsigned long long blkno, int error);
 int ocfs2_sysfs_sb_init(struct super_block *sb);
 void ocfs2_sysfs_sb_exit(struct super_block *sb);
 
-- 
2.6.6