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authorAndrew Price <anprice@redhat.com>2017-12-12 11:42:30 -0600
committerBob Peterson <rpeterso@redhat.com>2017-12-12 11:43:42 -0600
commit850d2d915fa69011bef9bd668499cce889fdd8b3 (patch)
tree7dbc81bc6579f08027b72d2f11f519bf3c76131c /fs/gfs2
parent166725d96322473305e35f9d580591a01697ab29 (diff)
gfs2: Add a crc field to resource group headers
Add the rg_crc field to store a crc32 of the gfs2_rgrp structure. This allows us to check resource group headers' integrity and removes the requirement to check them against the rindex entries in fsck. If this field is found to be zero, it should be ignored (or updated with an accurate value). Signed-off-by: Andrew Price <anprice@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/rgrp.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index a9184903a9f5..e8aba6fa1472 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -34,6 +34,7 @@
#include "log.h"
#include "inode.h"
#include "trace_gfs2.h"
+#include "dir.h"
#define BFITNOENT ((u32)~0)
#define NO_BLOCK ((u64)~0)
@@ -1047,6 +1048,7 @@ static void gfs2_rgrp_out(struct gfs2_rgrpd *rgd, void *buf)
{
struct gfs2_rgrpd *next = gfs2_rgrpd_get_next(rgd);
struct gfs2_rgrp *str = buf;
+ u32 crc;
str->rg_flags = cpu_to_be32(rgd->rd_flags & ~GFS2_RDF_MASK);
str->rg_free = cpu_to_be32(rgd->rd_free);
@@ -1059,6 +1061,9 @@ static void gfs2_rgrp_out(struct gfs2_rgrpd *rgd, void *buf)
str->rg_data0 = cpu_to_be64(rgd->rd_data0);
str->rg_data = cpu_to_be32(rgd->rd_data);
str->rg_bitbytes = cpu_to_be32(rgd->rd_bitbytes);
+ str->rg_crc = 0;
+ crc = gfs2_disk_hash(buf, sizeof(struct gfs2_rgrp));
+ str->rg_crc = cpu_to_be32(crc);
memset(&str->rg_reserved, 0, sizeof(str->rg_reserved));
}