From: Alex Markuze Date: Tue, 10 Feb 2026 09:06:24 +0000 (+0000) Subject: ceph: handle InodeStat v8 versioned field in reply parsing X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=a5a7b3c7dc87f257d4c1513e6d5f45c57050cc0c;p=ceph-client.git ceph: handle InodeStat v8 versioned field in reply parsing Add forward-compatible handling for the new versioned field introduced in InodeStat v8. This patch only skips the field without using it, preparing for future protocol extensions. The v8 encoding adds a versioned sub-structure that needs to be properly decoded and skipped to maintain compatibility with newer MDS versions. Signed-off-by: Alex Markuze Reviewed-by: Viacheslav Dubeyko --- diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 12d5c4bded43..b2a07185cecd 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -232,6 +232,26 @@ static int parse_reply_info_in(void **p, void *end, info->fscrypt_file_len, bad); } } + + /* + * InodeStat encoding versions: + * v1-v7: various fields added over time + * v8: added optmetadata (versioned sub-structure containing + * optional inode metadata like charmap for case-insensitive + * filesystems). The kernel client doesn't support + * case-insensitive lookups, so we skip this field. + * v9: added subvolume_id (parsed below) + */ + if (struct_v >= 8) { + u32 v8_struct_len; + + /* skip optmetadata versioned sub-structure */ + ceph_decode_skip_8(p, end, bad); /* struct_v */ + ceph_decode_skip_8(p, end, bad); /* struct_compat */ + ceph_decode_32_safe(p, end, v8_struct_len, bad); + ceph_decode_skip_n(p, end, v8_struct_len, bad); + } + *p = end; } else { /* legacy (unversioned) struct */