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Improvements to the 'compatibility' property

Browse Source 
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
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 2903 additions and 2679 deletions
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165
cmd/zpool/zpool_main.c
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);

7
include/libzfs.h
View File

@ -393,6 +393,7 @@ typedef enum {
ZPOOL_STATUS_REBUILD_SCRUB, /* recommend scrubbing the pool */
ZPOOL_STATUS_NON_NATIVE_ASHIFT, /* (e.g. 512e dev with ashift of 9) */
ZPOOL_STATUS_COMPATIBILITY_ERR, /* bad 'compatibility' property */
ZPOOL_STATUS_INCOMPATIBLE_FEAT, /* feature set outside compatibility */
/*
* Finally, the following indicates a healthy pool.
@ -922,14 +923,14 @@ extern int zpool_disable_datasets(zpool_handle_t *, boolean_t);
*/
typedef enum {
ZPOOL_COMPATIBILITY_OK,
ZPOOL_COMPATIBILITY_READERR,
ZPOOL_COMPATIBILITY_WARNTOKEN,
ZPOOL_COMPATIBILITY_BADTOKEN,
ZPOOL_COMPATIBILITY_BADFILE,
ZPOOL_COMPATIBILITY_BADWORD,
ZPOOL_COMPATIBILITY_NOFILES
} zpool_compat_status_t;
extern zpool_compat_status_t zpool_load_compat(const char *,
boolean_t *, char *, char *);
boolean_t *, char *, size_t);
#ifdef __FreeBSD__

5109
lib/libzfs/libzfs.abi
View File

File diff suppressed because it is too large Load Diff

242
lib/libzfs/libzfs_pool.c
View File

@ -467,8 +467,7 @@ zpool_valid_proplist(libzfs_handle_t *hdl, const char *poolname,
char *slash, *check;
struct stat64 statbuf;
zpool_handle_t *zhp;
char badword[ZFS_MAXPROPLEN];
char badfile[MAXPATHLEN];
char report[1024];
if (nvlist_alloc(&retprops, NV_UNIQUE_NAME, 0) != 0) {
(void) no_memory(hdl);
@ -679,33 +678,14 @@ zpool_valid_proplist(libzfs_handle_t *hdl, const char *poolname,
break;
case ZPOOL_PROP_COMPATIBILITY:
switch (zpool_load_compat(strval, NULL,
badword, badfile)) {
switch (zpool_load_compat(strval, NULL, report, 1024)) {
case ZPOOL_COMPATIBILITY_OK:
case ZPOOL_COMPATIBILITY_WARNTOKEN:
break;
case ZPOOL_COMPATIBILITY_READERR:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"error reading feature file '%s'"),
badfile);
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
case ZPOOL_COMPATIBILITY_BADFILE:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"feature file '%s' too large or not "
"newline-terminated"),
badfile);
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
case ZPOOL_COMPATIBILITY_BADWORD:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"unknown feature '%s' in feature "
"file '%s'"),
badword, badfile);
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
case ZPOOL_COMPATIBILITY_BADTOKEN:
case ZPOOL_COMPATIBILITY_NOFILES:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"no feature files specified"));
zfs_error_aux(hdl, report);
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
}
@ -4742,8 +4722,8 @@ zpool_get_bootenv(zpool_handle_t *zhp, nvlist_t **nvlp)
* Arguments:
* compatibility : string containing feature filenames
* features : either NULL or pointer to array of boolean
* badtoken : either NULL or pointer to char[ZFS_MAXPROPLEN]
* badfile : either NULL or pointer to char[MAXPATHLEN]
* report : either NULL or pointer to string buffer
* rlen : length of "report" buffer
*
* compatibility is NULL (unset), "", "off", "legacy", or list of
* comma-separated filenames. filenames should either be absolute,
@ -4752,48 +4732,56 @@ zpool_get_bootenv(zpool_handle_t *zhp, nvlist_t **nvlp)
* 2) ZPOOL_DATA_COMPAT_D (eg: /usr/share/zfs/compatibility.d).
* (Unset), "" or "off" => enable all features
* "legacy" => disable all features
*
* Any feature names read from files which match unames in spa_feature_table
* will have the corresponding boolean set in the features array (if non-NULL).
* If more than one feature set specified, only features present in *all* of
* them will be set.
*
* An unreadable filename will be strlcpy'd to badfile (if non-NULL).
* An unrecognized feature will be strlcpy'd to badtoken (if non-NULL).
* "report" if not NULL will be populated with a suitable status message.
*
* Return values:
* ZPOOL_COMPATIBILITY_OK : files read and parsed ok
* ZPOOL_COMPATIBILITY_READERR : file could not be opened / mmap'd
* ZPOOL_COMPATIBILITY_BADFILE : file too big or not a text file
* ZPOOL_COMPATIBILITY_BADWORD : file contains invalid feature name
* ZPOOL_COMPATIBILITY_NOFILES : no file names found
* ZPOOL_COMPATIBILITY_BADTOKEN : SYSCONF file contains invalid feature name
* ZPOOL_COMPATIBILITY_WARNTOKEN : DATA file contains invalid feature name
* ZPOOL_COMPATIBILITY_NOFILES : no feature files found
*/
zpool_compat_status_t
zpool_load_compat(const char *compatibility,
boolean_t *features, char *badtoken, char *badfile)
zpool_load_compat(const char *compat, boolean_t *features, char *report,
size_t rlen)
{
int sdirfd, ddirfd, featfd;
int i;
struct stat fs;
char *fc; /* mmap of file */
char *ps, *ls, *ws; /* strtok state */
char *fc;
char *ps, *ls, *ws;
char *file, *line, *word;
char filenames[ZFS_MAXPROPLEN];
int filecount = 0;
char l_compat[ZFS_MAXPROPLEN];
boolean_t ret_nofiles = B_TRUE;
boolean_t ret_badfile = B_FALSE;
boolean_t ret_badtoken = B_FALSE;
boolean_t ret_warntoken = B_FALSE;
/* special cases (unset), "" and "off" => enable all features */
if (compatibility == NULL || compatibility[0] == '\0' ||
strcmp(compatibility, ZPOOL_COMPAT_OFF) == 0) {
if (compat == NULL || compat[0] == '\0' ||
strcmp(compat, ZPOOL_COMPAT_OFF) == 0) {
if (features != NULL)
for (i = 0; i < SPA_FEATURES; i++)
for (uint_t i = 0; i < SPA_FEATURES; i++)
features[i] = B_TRUE;
if (report != NULL)
strlcpy(report, gettext("all features enabled"), rlen);
return (ZPOOL_COMPATIBILITY_OK);
}
/* Final special case "legacy" => disable all features */
if (strcmp(compatibility, ZPOOL_COMPAT_LEGACY) == 0) {
if (strcmp(compat, ZPOOL_COMPAT_LEGACY) == 0) {
if (features != NULL)
for (i = 0; i < SPA_FEATURES; i++)
for (uint_t i = 0; i < SPA_FEATURES; i++)
features[i] = B_FALSE;
if (report != NULL)
strlcpy(report, gettext("all features disabled"), rlen);
return (ZPOOL_COMPATIBILITY_OK);
}
@ -4801,9 +4789,12 @@ zpool_load_compat(const char *compatibility,
* Start with all true; will be ANDed with results from each file
*/
if (features != NULL)
for (i = 0; i < SPA_FEATURES; i++)
for (uint_t i = 0; i < SPA_FEATURES; i++)
features[i] = B_TRUE;
char err_badfile[1024] = "";
char err_badtoken[1024] = "";
/*
* We ignore errors from the directory open()
* as they're only needed if the filename is relative
@ -4815,32 +4806,33 @@ zpool_load_compat(const char *compatibility,
sdirfd = open(ZPOOL_SYSCONF_COMPAT_D, O_DIRECTORY | O_PATH | O_CLOEXEC);
ddirfd = open(ZPOOL_DATA_COMPAT_D, O_DIRECTORY | O_PATH | O_CLOEXEC);
(void) strlcpy(filenames, compatibility, ZFS_MAXPROPLEN);
file = strtok_r(filenames, ",", &ps);
while (file != NULL) {
boolean_t features_local[SPA_FEATURES];
(void) strlcpy(l_compat, compat, ZFS_MAXPROPLEN);
for (file = strtok_r(l_compat, ",", &ps);
file != NULL;
file = strtok_r(NULL, ",", &ps)) {
boolean_t l_features[SPA_FEATURES];
enum { Z_SYSCONF, Z_DATA } source;
/* try sysconfdir first, then datadir */
if ((featfd = openat(sdirfd, file, 0, O_RDONLY)) < 0)
source = Z_SYSCONF;
if ((featfd = openat(sdirfd, file, 0, O_RDONLY)) < 0) {
featfd = openat(ddirfd, file, 0, O_RDONLY);
if (featfd < 0 || fstat(featfd, &fs) < 0) {
(void) close(featfd);
(void) close(sdirfd);
(void) close(ddirfd);
if (badfile != NULL)
(void) strlcpy(badfile, file, MAXPATHLEN);
return (ZPOOL_COMPATIBILITY_READERR);
source = Z_DATA;
}
/* Too big or too small */
if (fs.st_size < 1 || fs.st_size > ZPOOL_COMPAT_MAXSIZE) {
/* File readable and correct size? */
if (featfd < 0 ||
fstat(featfd, &fs) < 0 ||
fs.st_size < 1 ||
fs.st_size > ZPOOL_COMPAT_MAXSIZE) {
(void) close(featfd);
(void) close(sdirfd);
(void) close(ddirfd);
if (badfile != NULL)
(void) strlcpy(badfile, file, MAXPATHLEN);
return (ZPOOL_COMPATIBILITY_BADFILE);
strlcat(err_badfile, file, ZFS_MAXPROPLEN);
strlcat(err_badfile, " ", ZFS_MAXPROPLEN);
ret_badfile = B_TRUE;
continue;
}
/* private mmap() so we can strtok safely */
@ -4848,73 +4840,99 @@ zpool_load_compat(const char *compatibility,
PROT_READ|PROT_WRITE, MAP_PRIVATE, featfd, 0);
(void) close(featfd);
if (fc < 0) {
(void) close(sdirfd);
(void) close(ddirfd);
if (badfile != NULL)
(void) strlcpy(badfile, file, MAXPATHLEN);
return (ZPOOL_COMPATIBILITY_READERR);
}
/* Text file sanity check - last char should be newline */
if (fc[fs.st_size - 1] != '\n') {
/* map ok, and last character == newline? */
if (fc < 0 || fc[fs.st_size - 1] != '\n') {
(void) munmap((void *) fc, fs.st_size);
(void) close(sdirfd);
(void) close(ddirfd);
if (badfile != NULL)
(void) strlcpy(badfile, file, MAXPATHLEN);
return (ZPOOL_COMPATIBILITY_BADFILE);
strlcat(err_badfile, file, ZFS_MAXPROPLEN);
strlcat(err_badfile, " ", ZFS_MAXPROPLEN);
ret_badfile = B_TRUE;
continue;
}
/* replace with NUL to ensure we have a delimiter */
ret_nofiles = B_FALSE;
for (uint_t i = 0; i < SPA_FEATURES; i++)
l_features[i] = B_FALSE;
/* replace last char with NUL to ensure we have a delimiter */
fc[fs.st_size - 1] = '\0';
for (i = 0; i < SPA_FEATURES; i++)
features_local[i] = B_FALSE;
line = strtok_r(fc, "\n", &ls);
while (line != NULL) {
for (line = strtok_r(fc, "\n", &ls);
line != NULL;
line = strtok_r(NULL, "\n", &ls)) {
/* discard comments */
*(strchrnul(line, '#')) = '\0';
word = strtok_r(line, ", \t", &ws);
while (word != NULL) {
for (word = strtok_r(line, ", \t", &ws);
word != NULL;
word = strtok_r(NULL, ", \t", &ws)) {
/* Find matching feature name */
for (i = 0; i < SPA_FEATURES; i++) {
uint_t f;
for (f = 0; f < SPA_FEATURES; f++) {
zfeature_info_t *fi =
&spa_feature_table[i];
&spa_feature_table[f];
if (strcmp(word, fi->fi_uname) == 0) {
features_local[i] = B_TRUE;
l_features[f] = B_TRUE;
break;
}
}
if (i == SPA_FEATURES) {
if (badtoken != NULL)
(void) strlcpy(badtoken, word,
ZFS_MAXPROPLEN);
if (badfile != NULL)
(void) strlcpy(badfile, file,
MAXPATHLEN);
(void) munmap((void *) fc, fs.st_size);
(void) close(sdirfd);
(void) close(ddirfd);
return (ZPOOL_COMPATIBILITY_BADWORD);
if (f < SPA_FEATURES)
continue;
/* found an unrecognized word */
/* lightly sanitize it */
if (strlen(word) > 32)
word[32] = '\0';
for (char *c = word; *c != '\0'; c++)
if (!isprint(*c))
*c = '?';
strlcat(err_badtoken, word, ZFS_MAXPROPLEN);
strlcat(err_badtoken, " ", ZFS_MAXPROPLEN);
if (source == Z_SYSCONF)
ret_badtoken = B_TRUE;
else
ret_warntoken = B_TRUE;
}
word = strtok_r(NULL, ", \t", &ws);
}
line = strtok_r(NULL, "\n", &ls);
}
(void) munmap((void *) fc, fs.st_size);
if (features != NULL) {
for (i = 0; i < SPA_FEATURES; i++)
features[i] &= features_local[i];
}
filecount++;
file = strtok_r(NULL, ",", &ps);
if (features != NULL)
for (uint_t i = 0; i < SPA_FEATURES; i++)
features[i] &= l_features[i];
}
(void) close(sdirfd);
(void) close(ddirfd);
if (filecount == 0)
/* Return the most serious error */
if (ret_badfile) {
if (report != NULL)
snprintf(report, rlen, gettext("could not read/"
"parse feature file(s): %s"), err_badfile);
return (ZPOOL_COMPATIBILITY_BADFILE);
}
if (ret_nofiles) {
if (report != NULL)
strlcpy(report,
gettext("no valid compatibility files specified"),
rlen);
return (ZPOOL_COMPATIBILITY_NOFILES);
}
if (ret_badtoken) {
if (report != NULL)
snprintf(report, rlen, gettext("invalid feature "
"name(s) in local compatibility files: %s"),
err_badtoken);
return (ZPOOL_COMPATIBILITY_BADTOKEN);
}
if (ret_warntoken) {
if (report != NULL)
snprintf(report, rlen, gettext("unrecognized feature "
"name(s) in distribution compatibility files: %s"),
err_badtoken);
return (ZPOOL_COMPATIBILITY_WARNTOKEN);
}
if (report != NULL)
strlcpy(report, gettext("compatibility set ok"), rlen);
return (ZPOOL_COMPATIBILITY_OK);
}

26
lib/libzfs/libzfs_status.c
View File

@ -89,6 +89,7 @@ static char *zfs_msgid_table[] = {
* ZPOOL_STATUS_REBUILDING
* ZPOOL_STATUS_REBUILD_SCRUB
* ZPOOL_STATUS_COMPATIBILITY_ERR
* ZPOOL_STATUS_INCOMPATIBLE_FEAT
* ZPOOL_STATUS_OK
*/
};
@ -453,11 +454,17 @@ check_status(nvlist_t *config, boolean_t isimport,
/*
* Outdated, but usable, version
*/
if (SPA_VERSION_IS_SUPPORTED(version) && version != SPA_VERSION)
if (SPA_VERSION_IS_SUPPORTED(version) && version != SPA_VERSION) {
/* "legacy" compatibility disables old version reporting */
if (compat != NULL && strcmp(compat, ZPOOL_COMPAT_LEGACY) == 0)
return (ZPOOL_STATUS_OK);
else
return (ZPOOL_STATUS_VERSION_OLDER);
}
/*
* Usable pool with disabled features
* Usable pool with disabled or superfluous features
* (superfluous = beyond what's requested by 'compatibility')
*/
if (version >= SPA_VERSION_FEATURES) {
int i;
@ -475,18 +482,23 @@ check_status(nvlist_t *config, boolean_t isimport,
}
/* check against all features, or limited set? */
boolean_t pool_features[SPA_FEATURES];
boolean_t c_features[SPA_FEATURES];
if (zpool_load_compat(compat, pool_features, NULL, NULL) !=
ZPOOL_COMPATIBILITY_OK)
switch (zpool_load_compat(compat, c_features, NULL, 0)) {
case ZPOOL_COMPATIBILITY_OK:
case ZPOOL_COMPATIBILITY_WARNTOKEN:
break;
default:
return (ZPOOL_STATUS_COMPATIBILITY_ERR);
}
for (i = 0; i < SPA_FEATURES; i++) {
zfeature_info_t *fi = &spa_feature_table[i];
if (!fi->fi_zfs_mod_supported)
continue;
if (pool_features[i] &&
!nvlist_exists(feat, fi->fi_guid))
if (c_features[i] && !nvlist_exists(feat, fi->fi_guid))
return (ZPOOL_STATUS_FEAT_DISABLED);
if (!c_features[i] && nvlist_exists(feat, fi->fi_guid))
return (ZPOOL_STATUS_INCOMPATIBLE_FEAT);
}
}

15
man/man5/zpool-features.5
View File

@ -166,6 +166,12 @@ enabled when using \fBzpool upgrade\fR. \fBzpool status\fR
will not show a warning about disabled features which are not part
of the requested feature set.
.LP
The special value \fBlegacy\fR prevents any features from being enabled,
either via \fBzpool upgrade\fR or via \fBzpool set feature@XX=enabled\fR.
This setting also prevents pools from being upgraded to newer on-disk
versions. This is a safety measure to prevent new features from being
accidentally enabled, breaking compatibility.
.LP
By convention, compatibility files in \fB/usr/share/zfs/compatibility.d\fR
are provided by the distribution package, and include feature sets
supported by important versions of popular distributions, and feature
@ -173,6 +179,15 @@ sets commonly supported at the start of each year. Compatibility files
in \fB/etc/zfs/compatibility.d\fR, if present, will take precedence over
files with the same name in \fB/usr/share/zfs/compatibility.d\fR.
.LP
If an unrecognized feature is found in these files, an error message will
be shown. If the unrecognized feature is in a file in
\fB/etc/zfs/compatibility.d\fR, this is treated as an error and processing
will stop. If the unrecognized feature is under
\fB/usr/share/zfs/compatibility.d\fR, this is treated as a warning and
processing will continue. This difference is to allow distributions to
include features which might not be recognized by the currently-installed
binaries.
.LP
Compatibility files may include comments; any text from \fB#\fR to the end
of the line is ignored.
.LP

16
man/man8/zpool-upgrade.8
View File

@ -55,11 +55,9 @@ formatted using a legacy ZFS version number.
These pools can continue to be used, but some features may not be available.
Use
.Nm zpool Cm upgrade Fl a
to enable all features on all pools. (If a pool has specified compatibility
feature sets using the
to enable all features on all pools (subject to the
.Fl o Ar compatibility
property, only the features present in all requested compatibility sets will
be enabled on that pool.)
property).
.It Xo
.Nm zpool
.Cm upgrade
@ -75,11 +73,15 @@ for a description of feature flags features supported by the current software.
.Op Fl V Ar version
.Fl a Ns | Ns Ar pool Ns ...
.Xc
Enables all supported features on the given pool. (If the pool has specified
compatibility feature sets using the
Enables all supported features on the given pool.
.Pp
If the pool has specified compatibility feature sets using the
.Fl o Ar compatibility
property, only the features present in all requested compatibility sets will be
enabled.)
enabled. If this property is set to
.Ar legacy
then no upgrade will take place.
.Pp
Once this is done, the pool will no longer be accessible on systems that do not
support feature flags.
See