[Cluster-devel] [PATCH 11/13] restoremeta: Combine parse_header() and check_header()
Andrew Price
anprice at redhat.com
Thu Jan 23 15:55:50 UTC 2020
Fixes an issue where smh was being left with garbage values with
old metadata files with no header.
Signed-off-by: Andrew Price <anprice at redhat.com>
---
gfs2/edit/savemeta.c | 19 +++++++------------
1 file changed, 7 insertions(+), 12 deletions(-)
diff --git a/gfs2/edit/savemeta.c b/gfs2/edit/savemeta.c
index 2cfa2f44..7e47b810 100644
--- a/gfs2/edit/savemeta.c
+++ b/gfs2/edit/savemeta.c
@@ -856,20 +856,19 @@ static int save_header(struct metafd *mfd, uint64_t fsbytes)
return 0;
}
-static void parse_header(char *buf, struct savemeta_header *smh)
+static int parse_header(char *buf, struct savemeta_header *smh)
{
struct savemeta_header *smh_be = (void *)buf;
+ if (be32_to_cpu(smh_be->sh_magic) != SAVEMETA_MAGIC ||
+ be32_to_cpu(smh_be->sh_format) > SAVEMETA_FORMAT) {
+ printf("No valid file header found. Falling back to old format...\n");
+ return -1;
+ }
smh->sh_magic = be32_to_cpu(smh_be->sh_magic);
smh->sh_format = be32_to_cpu(smh_be->sh_format);
smh->sh_time = be64_to_cpu(smh_be->sh_time);
smh->sh_fs_bytes = be64_to_cpu(smh_be->sh_fs_bytes);
-}
-
-static int check_header(struct savemeta_header *smh)
-{
- if (smh->sh_magic != SAVEMETA_MAGIC || smh->sh_format > SAVEMETA_FORMAT)
- return -1;
printf("Metadata saved at %s", ctime((time_t *)&smh->sh_time)); /* ctime() adds \n */
printf("File system size %.2fGB\n", smh->sh_fs_bytes / ((float)(1 << 30)));
return 0;
@@ -1155,14 +1154,10 @@ static int restore_init(const char *path, struct metafd *mfd, struct savemeta_he
return -1;
}
bp = restore_buf;
- parse_header(bp, smh);
- if (check_header(smh) != 0)
- printf("No valid file header found. Falling back to old format...\n");
- else {
+ if (parse_header(bp, smh) == 0) {
bp = restore_buf + sizeof(*smh);
restore_off = sizeof(*smh);
}
-
/* Scan for the position of the superblock. Required to support old formats(?). */
end = &restore_buf[256 + sizeof(struct saved_metablock) + sizeof(*sbmh)];
while (bp <= end) {
--
2.24.1
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