diff options
Diffstat (limited to 'lib/metadata/lv_manip.c')
| -rw-r--r-- | lib/metadata/lv_manip.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/lib/metadata/lv_manip.c b/lib/metadata/lv_manip.c index 508f78c13..0ec9c2f51 100644 --- a/lib/metadata/lv_manip.c +++ b/lib/metadata/lv_manip.c @@ -6050,6 +6050,55 @@ int lv_resize(struct logical_volume *lv, (pvh != &vg->pvs)) log_print_unless_silent("Ignoring PVs on command line when reducing."); + if (lp->detectfs) { + char pathname[PATH_MAX]; + char *dmname; + char fs_buf[16] = {0}; + int fs_can_reduce = 0; + + /* if lv is not active, activate it */ + if (!lv_is_active(lv)) { + if (!activate_lv(cmd, lv)) { + log_error("Failed to activate %s for --detectfs.", display_lvname(lv)); + return 0; + } + if (!sync_local_dev_names(cmd)) + return_0; + activated = 1; + } + + if (!(dmname = dm_build_dm_name(cmd->mem, vg->name, lv->name, NULL))) + return_0; + + if (dm_snprintf(pathname, sizeof(pathname), "%s/%s", dm_dir(), dmname) < 0) + return_0; + + /* use blkid to check fs type, we know which types can reduce */ + if (!get_fs_can_reduce(pathname, &fs_can_reduce, fs_buf, sizeof(fs_buf))) { + log_error("Failed to find file system type for --detectfs."); + goto bad; + } + + if (!fs_can_reduce) { + log_error("Detected file system type %s that cannot be reduced (from --detectfs).", + fs_buf[0] ? fs_buf : "unknown"); + goto bad; + } + + /* + * We've checked that the fs can reduce, but if the user has + * not set --resizefs to actually do the fs reduction, then + * report an error since it would unnecessarily cause data + * loss. i.e. require the user to add either --detectfs n or + * --resizefs. + */ + if (!lp->resizefs) { + log_error("Detected file system type %s that can be reduced (see --resizefs).", + fs_buf[0] ? fs_buf : "unknown"); + goto bad; + } + } + /* Request confirmation before operations that are often mistakes. */ /* aux_lv never resize fs */ if ((lp->resizefs || (lp->resize == LV_REDUCE)) && |