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| author | Andrew Price <anprice@redhat.com> | 2017-12-12 11:42:30 -0600 |
|---|---|---|
| committer | Bob Peterson <rpeterso@redhat.com> | 2017-12-12 11:43:42 -0600 |
| commit | 850d2d915fa69011bef9bd668499cce889fdd8b3 (patch) | |
| tree | 7dbc81bc6579f08027b72d2f11f519bf3c76131c /fs/gfs2 | |
| parent | 166725d96322473305e35f9d580591a01697ab29 (diff) | |
| download | linux-850d2d915fa69011bef9bd668499cce889fdd8b3.tar.gz linux-850d2d915fa69011bef9bd668499cce889fdd8b3.tar.bz2 linux-850d2d915fa69011bef9bd668499cce889fdd8b3.zip | |
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.c | 5 |
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)); } |