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Illumos #1796, #2871, #2903, #2957

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1796 "ZFS HOLD" should not be used when doing "ZFS SEND" from a read-only pool
2871 support for __ZFS_POOL_RESTRICT used by ZFS test suite
2903 zfs destroy -d does not work
2957 zfs destroy -R/r sometimes fails when removing defer-destroyed snapshot
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Approved by: Eric Schrock <Eric.Schrock@delphix.com>

References:
  https://www.illumos.org/issues/1796
  https://www.illumos.org/issues/2871
  https://www.illumos.org/issues/2903
  https://www.illumos.org/issues/2957

Ported by: Martin Matuska <martin@matuska.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Christopher Siden 2012-07-12 05:32:45 -07:00 committed by Brian Behlendorf
parent db49968e5c
commit e956d65106
4 changed files with 66 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
cmd/zfs/zfs_main.c
View File

@ -1066,7 +1066,7 @@ snapshot_to_nvl_cb(zfs_handle_t *zhp, void *arg)
int err = 0;
/* Check for clones. */
if (!cb->cb_doclones) {
if (!cb->cb_doclones && !cb->cb_defer_destroy) {
cb->cb_target = zhp;
cb->cb_first = B_TRUE;
err = zfs_iter_dependents(zhp, B_TRUE,

48
lib/libzfs/libzfs_config.c
View File

@ -301,6 +301,48 @@ zpool_refresh_stats(zpool_handle_t *zhp, boolean_t *missing)
return (0);
}
/*
* If the __ZFS_POOL_RESTRICT environment variable is set we only iterate over
* pools it lists.
*
* This is an undocumented feature for use during testing only.
*
* This function returns B_TRUE if the pool should be skipped
* during iteration.
*/
static boolean_t
check_restricted(const char *poolname)
{
static boolean_t initialized = B_FALSE;
static char *restricted = NULL;
const char *cur, *end;
int len, namelen;
if (!initialized) {
initialized = B_TRUE;
restricted = getenv("__ZFS_POOL_RESTRICT");
}
if (NULL == restricted)
return (B_FALSE);
cur = restricted;
namelen = strlen(poolname);
do {
end = strchr(cur, ' ');
len = (NULL == end) ? strlen(cur) : (end - cur);
if (len == namelen && 0 == strncmp(cur, poolname, len)) {
return (B_FALSE);
}
cur += (len + 1);
} while (NULL != end);
return (B_TRUE);
}
/*
* Iterate over all pools in the system.
*/
@ -324,6 +366,9 @@ zpool_iter(libzfs_handle_t *hdl, zpool_iter_f func, void *data)
for (cn = uu_avl_first(hdl->libzfs_ns_avl); cn != NULL;
cn = uu_avl_next(hdl->libzfs_ns_avl, cn)) {
if (check_restricted(cn->cn_name))
continue;
if (zpool_open_silent(hdl, cn->cn_name, &zhp) != 0) {
hdl->libzfs_pool_iter--;
return (-1);
@ -359,6 +404,9 @@ zfs_iter_root(libzfs_handle_t *hdl, zfs_iter_f func, void *data)
for (cn = uu_avl_first(hdl->libzfs_ns_avl); cn != NULL;
cn = uu_avl_next(hdl->libzfs_ns_avl, cn)) {
if (check_restricted(cn->cn_name))
continue;
if ((zhp = make_dataset_handle(hdl, cn->cn_name)) == NULL)
continue;

6
lib/libzfs/libzfs_dataset.c
View File

@ -3118,7 +3118,8 @@ zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
/*
* Destroys the given dataset. The caller must make sure that the filesystem
* isn't mounted, and that there are no active dependents.
* isn't mounted, and that there are no active dependents. If the file system
* does not exist this function does nothing.
*/
int
zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
@ -3137,7 +3138,8 @@ zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
}
zc.zc_defer_destroy = defer;
if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0) {
if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 &&
errno != ENOENT) {
return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
zhp->zfs_name));

21
lib/libzfs/libzfs_sendrecv.c
View File

@ -21,7 +21,7 @@
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2011 by Delphix. All rights reserved.
* Copyright (c) 2012 by Delphix. All rights reserved.
* Copyright (c) 2012 Pawel Jakub Dawidek <pawel@dawidek.net>.
* All rights reserved
*/
@ -1308,7 +1308,6 @@ zfs_send(zfs_handle_t *zhp, const char *fromsnap, const char *tosnap,
avl_tree_t *fsavl = NULL;
static uint64_t holdseq;
int spa_version;
boolean_t holdsnaps = B_FALSE;
pthread_t tid;
int pipefd[2];
dedup_arg_t dda = { 0 };
@ -1331,11 +1330,6 @@ zfs_send(zfs_handle_t *zhp, const char *fromsnap, const char *tosnap,
}
}
if (!flags->dryrun && zfs_spa_version(zhp, &spa_version) == 0 &&
spa_version >= SPA_VERSION_USERREFS &&
(flags->doall || flags->replicate))
holdsnaps = B_TRUE;
if (flags->dedup && !flags->dryrun) {
featureflags |= (DMU_BACKUP_FEATURE_DEDUP |
DMU_BACKUP_FEATURE_DEDUPPROPS);
@ -1456,7 +1450,18 @@ zfs_send(zfs_handle_t *zhp, const char *fromsnap, const char *tosnap,
sdd.filter_cb_arg = cb_arg;
if (debugnvp)
sdd.debugnv = *debugnvp;
if (holdsnaps) {
/*
* Some flags require that we place user holds on the datasets that are
* being sent so they don't get destroyed during the send. We can skip
* this step if the pool is imported read-only since the datasets cannot
* be destroyed.
*/
if (!flags->dryrun && !zpool_get_prop_int(zfs_get_pool_handle(zhp),
ZPOOL_PROP_READONLY, NULL) &&
zfs_spa_version(zhp, &spa_version) == 0 &&
spa_version >= SPA_VERSION_USERREFS &&
(flags->doall || flags->replicate)) {
++holdseq;
(void) snprintf(sdd.holdtag, sizeof (sdd.holdtag),
".send-%d-%llu", getpid(), (u_longlong_t)holdseq);