diff options
| author | Andreas Gruenbacher <agruenba@redhat.com> | 2021-02-05 17:10:18 +0000 |
|---|---|---|
| committer | Andreas Gruenbacher <agruenba@redhat.com> | 2021-02-08 13:01:24 +0100 |
| commit | 866eef48d80234e1ea3a2f78b54afc563be3ea4a (patch) | |
| tree | 61626e0bd41554a4645d3c61e34488c4491765fe /fs/gfs2/ops_fstype.c | |
| parent | 47b7ec1daa511cd82cb9c31e88bfdb664b031d2a (diff) | |
gfs2: Add trusted xattr support
Add support for an additional filesystem version (sb_fs_format = 1802).
When a filesystem with the new version is mounted, the filesystem
supports "trusted.*" xattrs.
In addition, version 1802 filesystems implement a form of forward
compatibility for xattrs: when xattrs with an unknown prefix (ea_type)
are found on a version 1802 filesystem, those attributes are not shown
by listxattr, and they are not accessible by getxattr, setxattr, or
removexattr.
This mechanism might turn out to be what we need in the future, but if
not, we can always bump the filesystem version and break compatibility
instead.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Andrew Price <anprice@redhat.com>
Diffstat (limited to 'fs/gfs2/ops_fstype.c')
| -rw-r--r-- | fs/gfs2/ops_fstype.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c index c6537e94f4d8..d89764856f21 100644 --- a/fs/gfs2/ops_fstype.c +++ b/fs/gfs2/ops_fstype.c @@ -489,6 +489,19 @@ static int init_sb(struct gfs2_sbd *sdp, int silent) goto out; } + switch(sdp->sd_sb.sb_fs_format) { + case GFS2_FS_FORMAT_MAX: + sb->s_xattr = gfs2_xattr_handlers_max; + break; + + case GFS2_FS_FORMAT_MIN: + sb->s_xattr = gfs2_xattr_handlers_min; + break; + + default: + BUG(); + } + /* Set up the buffer cache and SB for real */ if (sdp->sd_sb.sb_bsize < bdev_logical_block_size(sb->s_bdev)) { ret = -EINVAL; @@ -1110,7 +1123,6 @@ static int gfs2_fill_super(struct super_block *sb, struct fs_context *fc) sb->s_op = &gfs2_super_ops; sb->s_d_op = &gfs2_dops; sb->s_export_op = &gfs2_export_ops; - sb->s_xattr = gfs2_xattr_handlers; sb->s_qcop = &gfs2_quotactl_ops; sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; |