/*
* XXX: this only supports reading and writing to version 4 superblock fields.
* V5 superblocks always define certain V4 feature bits - they are blocked from
* being changed if a V5 sb is detected, but otherwise v5 superblock features
* are not handled here.
*/
static int
version_f(
int argc,
char **argv)
{
__uint16_t version = 0;
__uint32_t features = 0;
xfs_agnumber_t ag;
if (argc == 2) { /* WRITE VERSION */
if ((x.isreadonly & LIBXFS_ISREADONLY) || !expert_mode) {
dbprintf(_("%s: not in expert mode, writing disabled\n"),
progname);
return 0;
}
/* Logic here derived from the IRIX xfs_chver(1M) script. */
if (!strcasecmp(argv[1], "extflg")) {
switch (XFS_SB_VERSION_NUM(&mp->m_sb)) {
case XFS_SB_VERSION_1:
version = 0x0004 | XFS_SB_VERSION_EXTFLGBIT;
break;
case XFS_SB_VERSION_2:
version = 0x0014 | XFS_SB_VERSION_EXTFLGBIT;
break;
case XFS_SB_VERSION_3:
version = 0x0034 | XFS_SB_VERSION_EXTFLGBIT;
break;
case XFS_SB_VERSION_4:
if (xfs_sb_version_hasextflgbit(&mp->m_sb))
dbprintf(
_("unwritten extents flag is already enabled\n"));
else
version = mp->m_sb.sb_versionnum |
XFS_SB_VERSION_EXTFLGBIT;
break;
case XFS_SB_VERSION_5:
dbprintf(
_("unwritten extents always enabled for v5 superblocks.\n"));
break;
}
} else if (!strcasecmp(argv[1], "log2")) {
switch (XFS_SB_VERSION_NUM(&mp->m_sb)) {
case XFS_SB_VERSION_1:
version = 0x0004 | XFS_SB_VERSION_LOGV2BIT;
break;
case XFS_SB_VERSION_2:
version = 0x0014 | XFS_SB_VERSION_LOGV2BIT;
break;
case XFS_SB_VERSION_3:
version = 0x0034 | XFS_SB_VERSION_LOGV2BIT;
break;
case XFS_SB_VERSION_4:
if (xfs_sb_version_haslogv2(&mp->m_sb))
dbprintf(
_("version 2 log format is already in use\n"));
else
version = mp->m_sb.sb_versionnum |
XFS_SB_VERSION_LOGV2BIT;
break;
case XFS_SB_VERSION_5:
dbprintf(
_("Version 2 logs always enabled for v5 superblocks.\n"));
break;
}
} else if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5) {
dbprintf(
_("%s: Cannot change %s on v5 superblocks.\n"),
progname, argv[1]);
return 0;
} else if (!strcasecmp(argv[1], "attr1")) {
if (xfs_sb_version_hasattr2(&mp->m_sb)) {
if (!(mp->m_sb.sb_features2 &=
~XFS_SB_VERSION2_ATTR2BIT))
mp->m_sb.sb_versionnum &=
~XFS_SB_VERSION_MOREBITSBIT;
}
xfs_sb_version_addattr(&mp->m_sb);
version = mp->m_sb.sb_versionnum;
features = mp->m_sb.sb_features2;
} else if (!strcasecmp(argv[1], "attr2")) {
xfs_sb_version_addattr(&mp->m_sb);
xfs_sb_version_addattr2(&mp->m_sb);
version = mp->m_sb.sb_versionnum;
features = mp->m_sb.sb_features2;
} else if (!strcasecmp(argv[1], "projid32bit")) {
xfs_sb_version_addprojid32bit(&mp->m_sb);
version = mp->m_sb.sb_versionnum;
features = mp->m_sb.sb_features2;
} else {
dbprintf(_("%s: invalid version change command \"%s\"\n"),
progname, argv[1]);
return 0;
}
if (version) {
dbprintf(_("writing all SBs\n"));
for (ag = 0; ag < mp->m_sb.sb_agcount; ag++)
if (!do_version(ag, version, features)) {
dbprintf(_("failed to set versionnum "
"in AG %d\n"), ag);
break;
}
mp->m_sb.sb_versionnum = version;
mp->m_sb.sb_features2 = features;
}
}
if (argc == 3) { /* VERSIONNUM + FEATURES2 */
char *sp;
version = mp->m_sb.sb_versionnum;
features = mp->m_sb.sb_features2;
mp->m_sb.sb_versionnum = strtoul(argv[1], &sp, 0);
mp->m_sb.sb_features2 = strtoul(argv[2], &sp, 0);
}
dbprintf(_("versionnum [0x%x+0x%x] = %s\n"), mp->m_sb.sb_versionnum,
mp->m_sb.sb_features2, version_string(&mp->m_sb));
if (argc == 3) { /* now reset... */
mp->m_sb.sb_versionnum = version;
mp->m_sb.sb_features2 = features;
return 0;
}
return 0;
}
void
update_sb_version(xfs_mount_t *mp)
{
xfs_sb_t *sb;
__uint16_t vn;
sb = &mp->m_sb;
if (fs_attributes && !xfs_sb_version_hasattr(sb)) {
ASSERT(fs_attributes_allowed);
xfs_sb_version_addattr(sb);
}
if (fs_attributes2 && !xfs_sb_version_hasattr2(sb)) {
ASSERT(fs_attributes2_allowed);
xfs_sb_version_addattr2(sb);
}
if (fs_inode_nlink && !xfs_sb_version_hasnlink(sb)) {
ASSERT(fs_inode_nlink_allowed);
xfs_sb_version_addnlink(sb);
}
/*
* fix up the superblock version number and feature bits,
* turn off quota bits and flags if the filesystem doesn't
* have quotas.
*/
if (fs_quotas) {
if (!xfs_sb_version_hasquota(sb)) {
ASSERT(fs_quotas_allowed);
xfs_sb_version_addquota(sb);
}
/*
* protect against stray bits in the quota flag field
*/
if (sb->sb_qflags & ~XFS_MOUNT_QUOTA_ALL) {
/*
* update the incore superblock, if we're in
* no_modify mode, it'll never get flushed out
* so this is ok.
*/
do_warn(_("bogus quota flags 0x%x set in superblock"),
sb->sb_qflags & ~XFS_MOUNT_QUOTA_ALL);
sb->sb_qflags &= XFS_MOUNT_QUOTA_ALL;
if (!no_modify)
do_warn(_(", bogus flags will be cleared\n"));
else
do_warn(_(", bogus flags would be cleared\n"));
}
} else {
sb->sb_qflags = 0;
if (xfs_sb_version_hasquota(sb)) {
lost_quotas = 1;
vn = sb->sb_versionnum;
vn &= ~XFS_SB_VERSION_QUOTABIT;
if (!(vn & XFS_SB_VERSION_ALLFBITS))
vn = xfs_sb_version_toold(vn);
ASSERT(vn != 0);
sb->sb_versionnum = vn;
}
}
if (!fs_aligned_inodes && xfs_sb_version_hasalign(sb))
sb->sb_versionnum &= ~XFS_SB_VERSION_ALIGNBIT;
}
