From 850d2d915fa69011bef9bd668499cce889fdd8b3 Mon Sep 17 00:00:00 2001 From: Andrew Price Date: Tue, 12 Dec 2017 11:42:30 -0600 Subject: 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 Signed-off-by: Bob Peterson --- fs/gfs2/rgrp.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'fs/gfs2') 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)); } -- cgit v1.2.3