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Improvements to the 'compatibility' property

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Several improvements to the operation of the 'compatibility' property:

1) Improved handling of unrecognized features:
Change the way unrecognized features in compatibility files are handled.

 * invalid features in files under /usr/share/zfs/compatibility.d
   only get a warning (as these may refer to future features not yet in
   the library),
 * invalid features in files under /etc/zfs/compatibility.d
   get an error (as these are presumed to refer to the current system).

2) Improved error reporting from zpool_load_compat.
Note: slight ABI change to zpool_load_compat for better error reporting.

3) compatibility=legacy inhibits all 'zpool upgrade' operations.

4) Detect when features are enabled outside current compatibility set
   * zpool set compatibility=foo <-- print a warning
   * zpool set feature@xxx=enabled <-- error
   * zpool status <-- indicate this state

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Colm Buckley <colm@tuatha.org>
Closes #11861
This commit is contained in:
Colm
2021-04-12 17:08:56 +01:00
committed by GitHub
parent 888700bc6b
commit e086db1656
7 changed files with 2903 additions and 2679 deletions
Download Patch File Download Diff File Expand all files Collapse all files
cmd/zpool/zpool_main.c
+136 -29
View File
@@ -786,7 +786,7 @@ add_prop_list(const char *propname, char *propval, nvlist_t **props,
if (poolprop) {
const char *vname = zpool_prop_to_name(ZPOOL_PROP_VERSION);
const char *fname =
const char *cname =
zpool_prop_to_name(ZPOOL_PROP_COMPATIBILITY);
if ((prop = zpool_name_to_prop(propname)) == ZPOOL_PROP_INVAL &&
@@ -811,16 +811,19 @@ add_prop_list(const char *propname, char *propval, nvlist_t **props,
}
/*
* compatibility property and version should not be specified
* at the same time.
* if version is specified, only "legacy" compatibility
* may be requested
*/
if ((prop == ZPOOL_PROP_COMPATIBILITY &&
strcmp(propval, ZPOOL_COMPAT_LEGACY) != 0 &&
nvlist_exists(proplist, vname)) ||
(prop == ZPOOL_PROP_VERSION &&
nvlist_exists(proplist, fname))) {
(void) fprintf(stderr, gettext("'compatibility' and "
"'version' properties cannot be specified "
"together\n"));
nvlist_exists(proplist, cname) &&
strcmp(fnvlist_lookup_string(proplist, cname),
ZPOOL_COMPAT_LEGACY) != 0)) {
(void) fprintf(stderr, gettext("when 'version' is "
"specified, the 'compatibility' feature may only "
"be set to '" ZPOOL_COMPAT_LEGACY "'\n"));
return (2);
}
@@ -1674,6 +1677,7 @@ zpool_do_create(int argc, char **argv)
* - enable_pool_features (ie: no '-d' or '-o version')
* - it's supported by the kernel module
* - it's in the requested feature set
* - warn if it's enabled but not in compat
*/
for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
char propname[MAXPATHLEN];
@@ -1687,6 +1691,14 @@ zpool_do_create(int argc, char **argv)
if (strcmp(propval, ZFS_FEATURE_DISABLED) == 0)
(void) nvlist_remove_all(props,
propname);
if (strcmp(propval,
ZFS_FEATURE_ENABLED) == 0 &&
!requested_features[i])
(void) fprintf(stderr, gettext(
"Warning: feature \"%s\" enabled "
"but is not in specified "
"'compatibility' feature set.\n"),
feat->fi_uname);
} else if (
enable_pool_features &&
feat->fi_zfs_mod_supported &&
@@ -2717,8 +2729,10 @@ show_import(nvlist_t *config, boolean_t report_error)
case ZPOOL_STATUS_FEAT_DISABLED:
printf_color(ANSI_BOLD, gettext("status: "));
printf_color(ANSI_YELLOW, gettext("Some supported and "
"requested features are not enabled on the pool.\n"));
printf_color(ANSI_YELLOW, gettext("Some supported "
"features are not enabled on the pool.\n\t"
"(Note that they may be intentionally disabled "
"if the\n\t'compatibility' property is set.)\n"));
break;
case ZPOOL_STATUS_COMPATIBILITY_ERR:
@@ -2728,6 +2742,13 @@ show_import(nvlist_t *config, boolean_t report_error)
"property.\n"));
break;
case ZPOOL_STATUS_INCOMPATIBLE_FEAT:
printf_color(ANSI_BOLD, gettext("status: "));
printf_color(ANSI_YELLOW, gettext("One or more features "
"are enabled on the pool despite not being\n"
"requested by the 'compatibility' property.\n"));
break;
case ZPOOL_STATUS_UNSUP_FEAT_READ:
printf_color(ANSI_BOLD, gettext("status: "));
printf_color(ANSI_YELLOW, gettext("The pool uses the following "
@@ -8055,7 +8076,8 @@ status_callback(zpool_handle_t *zhp, void *data)
(reason == ZPOOL_STATUS_OK ||
reason == ZPOOL_STATUS_VERSION_OLDER ||
reason == ZPOOL_STATUS_FEAT_DISABLED ||
reason == ZPOOL_STATUS_COMPATIBILITY_ERR)) {
reason == ZPOOL_STATUS_COMPATIBILITY_ERR ||
reason == ZPOOL_STATUS_INCOMPATIBLE_FEAT)) {
if (!cbp->cb_allpools) {
(void) printf(gettext("pool '%s' is healthy\n"),
zpool_get_name(zhp));
@@ -8254,6 +8276,18 @@ status_callback(zpool_handle_t *zhp, void *data)
ZPOOL_DATA_COMPAT_D ".\n"));
break;
case ZPOOL_STATUS_INCOMPATIBLE_FEAT:
printf_color(ANSI_BOLD, gettext("status: "));
printf_color(ANSI_YELLOW, gettext("One or more features "
"are enabled on the pool despite not being\n\t"
"requested by the 'compatibility' property.\n"));
printf_color(ANSI_BOLD, gettext("action: "));
printf_color(ANSI_YELLOW, gettext("Consider setting "
"'compatibility' to an appropriate value, or\n\t"
"adding needed features to the relevant file in\n\t"
ZPOOL_SYSCONF_COMPAT_D " or " ZPOOL_DATA_COMPAT_D ".\n"));
break;
case ZPOOL_STATUS_UNSUP_FEAT_READ:
printf_color(ANSI_BOLD, gettext("status: "));
printf_color(ANSI_YELLOW, gettext("The pool cannot be accessed "
@@ -8713,6 +8747,11 @@ upgrade_version(zpool_handle_t *zhp, uint64_t version)
verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
&oldversion) == 0);
char compat[ZFS_MAXPROPLEN];
if (zpool_get_prop(zhp, ZPOOL_PROP_COMPATIBILITY, compat,
ZFS_MAXPROPLEN, NULL, B_FALSE) != 0)
compat[0] = '\0';
assert(SPA_VERSION_IS_SUPPORTED(oldversion));
assert(oldversion < version);
@@ -8727,6 +8766,13 @@ upgrade_version(zpool_handle_t *zhp, uint64_t version)
return (1);
}
if (strcmp(compat, ZPOOL_COMPAT_LEGACY) == 0) {
(void) fprintf(stderr, gettext("Upgrade not performed because "
"'compatibility' property set to '"
ZPOOL_COMPAT_LEGACY "'.\n"));
return (1);
}
ret = zpool_upgrade(zhp, version);
if (ret != 0)
return (ret);
@@ -8868,7 +8914,10 @@ upgrade_list_older_cb(zpool_handle_t *zhp, void *arg)
"be upgraded to use feature flags. After "
"being upgraded, these pools\nwill no "
"longer be accessible by software that does not "
"support feature\nflags.\n\n"));
"support feature\nflags.\n\n"
"Note that setting a pool's 'compatibility' "
"feature to '" ZPOOL_COMPAT_LEGACY "' will\n"
"inhibit upgrades.\n\n"));
(void) printf(gettext("VER POOL\n"));
(void) printf(gettext("--- ------------\n"));
cbp->cb_first = B_FALSE;
@@ -8914,7 +8963,11 @@ upgrade_list_disabled_cb(zpool_handle_t *zhp, void *arg)
"software\nthat does not support "
"the feature. See "
"zpool-features(5) for "
"details.\n\n"));
"details.\n\n"
"Note that the pool "
"'compatibility' feature can be "
"used to inhibit\nfeature "
"upgrades.\n\n"));
(void) printf(gettext("POOL "
"FEATURE\n"));
(void) printf(gettext("------"
@@ -9970,6 +10023,63 @@ set_callback(zpool_handle_t *zhp, void *data)
int error;
set_cbdata_t *cb = (set_cbdata_t *)data;
/* Check if we have out-of-bounds features */
if (strcmp(cb->cb_propname, ZPOOL_CONFIG_COMPATIBILITY) == 0) {
boolean_t features[SPA_FEATURES];
if (zpool_do_load_compat(cb->cb_value, features) !=
ZPOOL_COMPATIBILITY_OK)
return (-1);
nvlist_t *enabled = zpool_get_features(zhp);
spa_feature_t i;
for (i = 0; i < SPA_FEATURES; i++) {
const char *fguid = spa_feature_table[i].fi_guid;
if (nvlist_exists(enabled, fguid) && !features[i])
break;
}
if (i < SPA_FEATURES)
(void) fprintf(stderr, gettext("Warning: one or "
"more features already enabled on pool '%s'\n"
"are not present in this compatibility set.\n"),
zpool_get_name(zhp));
}
/* if we're setting a feature, check it's in compatibility set */
if (zpool_prop_feature(cb->cb_propname) &&
strcmp(cb->cb_value, ZFS_FEATURE_ENABLED) == 0) {
char *fname = strchr(cb->cb_propname, '@') + 1;
spa_feature_t f;
if (zfeature_lookup_name(fname, &f) == 0) {
char compat[ZFS_MAXPROPLEN];
if (zpool_get_prop(zhp, ZPOOL_PROP_COMPATIBILITY,
compat, ZFS_MAXPROPLEN, NULL, B_FALSE) != 0)
compat[0] = '\0';
boolean_t features[SPA_FEATURES];
if (zpool_do_load_compat(compat, features) !=
ZPOOL_COMPATIBILITY_OK) {
(void) fprintf(stderr, gettext("Error: "
"cannot enable feature '%s' on pool '%s'\n"
"because the pool's 'compatibility' "
"property cannot be parsed.\n"),
fname, zpool_get_name(zhp));
return (-1);
}
if (!features[f]) {
(void) fprintf(stderr, gettext("Error: "
"cannot enable feature '%s' on pool '%s'\n"
"as it is not specified in this pool's "
"current compatibility set.\n"
"Consider setting 'compatibility' to a "
"less restrictive set, or to 'off'.\n"),
fname, zpool_get_name(zhp));
return (-1);
}
}
}
error = zpool_set_prop(zhp, cb->cb_propname, cb->cb_value);
if (!error)
@@ -10492,28 +10602,25 @@ zpool_do_version(int argc, char **argv)
static zpool_compat_status_t
zpool_do_load_compat(const char *compat, boolean_t *list)
{
char badword[ZFS_MAXPROPLEN];
char badfile[MAXPATHLEN];
char report[1024];
zpool_compat_status_t ret;
switch (ret = zpool_load_compat(compat, list, badword, badfile)) {
ret = zpool_load_compat(compat, list, report, 1024);
switch (ret) {
case ZPOOL_COMPATIBILITY_OK:
break;
case ZPOOL_COMPATIBILITY_READERR:
(void) fprintf(stderr, gettext("error reading compatibility "
"file '%s'\n"), badfile);
break;
case ZPOOL_COMPATIBILITY_BADFILE:
(void) fprintf(stderr, gettext("compatibility file '%s' "
"too large or not newline-terminated\n"), badfile);
break;
case ZPOOL_COMPATIBILITY_BADWORD:
(void) fprintf(stderr, gettext("unknown feature '%s' in "
"compatibility file '%s'\n"), badword, badfile);
break;
case ZPOOL_COMPATIBILITY_NOFILES:
(void) fprintf(stderr, gettext("no compatibility files "
"specified\n"));
case ZPOOL_COMPATIBILITY_BADFILE:
case ZPOOL_COMPATIBILITY_BADTOKEN:
(void) fprintf(stderr, "Error: %s\n", report);
break;
case ZPOOL_COMPATIBILITY_WARNTOKEN:
(void) fprintf(stderr, "Warning: %s\n", report);
ret = ZPOOL_COMPATIBILITY_OK;
break;
}
return (ret);