lkml.org 
[lkml]   [2012]   [Jul]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 04/16] GFS2: Fix error handling when reading an invalid block from the journal
Date
From: Steven Whitehouse <steve@chygwyn.com>

When we read an invalid block from the journal, we should not call
withdraw, but simply print a message and return an error. It is
up to the caller to then handle that error. In the case of mount
that means a failed mount, rather than a withdraw (requiring a
reboot). In the case of recovering another nodes journal then
we return an error via the uevent.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index 852c1be..8ff95a2 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -401,9 +401,14 @@ static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
goto out;
set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
- gfs2_meta_check(sdp, bd->bd_bh);
- gfs2_pin(sdp, bd->bd_bh);
mh = (struct gfs2_meta_header *)bd->bd_bh->b_data;
+ if (unlikely(mh->mh_magic != cpu_to_be32(GFS2_MAGIC))) {
+ printk(KERN_ERR
+ "Attempting to add uninitialised block to journal (inplace block=%lld)\n",
+ (unsigned long long)bd->bd_bh->b_blocknr);
+ BUG();
+ }
+ gfs2_pin(sdp, bd->bd_bh);
mh->__pad0 = cpu_to_be64(0);
mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
sdp->sd_log_num_buf++;
diff --git a/fs/gfs2/util.h b/fs/gfs2/util.h
index 3586b0d..8053573 100644
--- a/fs/gfs2/util.h
+++ b/fs/gfs2/util.h
@@ -79,23 +79,19 @@ int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
const char *type, const char *function,
char *file, unsigned int line);

-static inline int gfs2_meta_check_i(struct gfs2_sbd *sdp,
- struct buffer_head *bh,
- const char *function,
- char *file, unsigned int line)
+static inline int gfs2_meta_check(struct gfs2_sbd *sdp,
+ struct buffer_head *bh)
{
struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data;
u32 magic = be32_to_cpu(mh->mh_magic);
- if (unlikely(magic != GFS2_MAGIC))
- return gfs2_meta_check_ii(sdp, bh, "magic number", function,
- file, line);
+ if (unlikely(magic != GFS2_MAGIC)) {
+ printk(KERN_ERR "GFS2: Magic number missing at %llu\n",
+ (unsigned long long)bh->b_blocknr);
+ return -EIO;
+ }
return 0;
}

-#define gfs2_meta_check(sdp, bh) \
-gfs2_meta_check_i((sdp), (bh), __func__, __FILE__, __LINE__)
-
-
int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
u16 type, u16 t,
const char *function,
--
1.7.4


\
 
 \ /
  Last update: 2012-07-23 11:21    [W:1.373 / U:0.076 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site