From 71672e5c5dec2890af93b1f9bc42a31e0adbc7d4 Mon Sep 17 00:00:00 2001 From: Andriy Gapon Date: Wed, 14 Jun 2017 16:23:15 +0000 Subject: 8264 want support for promoting datasets in libzfs_core illumos/illumos-gate@a4b8c9aa65a0a735aba318024a424a90d7b06c37 https://github.com/illumos/illumos-gate/commit/a4b8c9aa65a0a735aba318024a424a90d7b06c37 https://www.illumos.org/issues/8264 Oddly there is a lzc_clone function, but no lzc_promote function. Reviewed by: Andriy Gapon Reviewed by: Matthew Ahrens Reviewed by: Dan McDonald Approved by: Dan McDonald Author: Andrew Stormont --- lib/libzfs/common/libzfs_dataset.c | 20 +++++++------------- lib/libzfs_core/common/libzfs_core.c | 25 ++++++++++++++++++++++++- lib/libzfs_core/common/libzfs_core.h | 2 ++ 3 files changed, 33 insertions(+), 14 deletions(-) diff --git a/lib/libzfs/common/libzfs_dataset.c b/lib/libzfs/common/libzfs_dataset.c index 33803630a162..52552047885e 100644 --- a/lib/libzfs/common/libzfs_dataset.c +++ b/lib/libzfs/common/libzfs_dataset.c @@ -30,6 +30,7 @@ * Copyright (c) 2014 Integros [integros.com] * Copyright 2016 Nexenta Systems, Inc. * Copyright 2016 Igor Kozhukhov + * Copyright 2017 RackTop Systems. */ #include @@ -3630,8 +3631,7 @@ int zfs_promote(zfs_handle_t *zhp) { libzfs_handle_t *hdl = zhp->zfs_hdl; - zfs_cmd_t zc = { 0 }; - char parent[MAXPATHLEN]; + char snapname[ZFS_MAX_DATASET_NAME_LEN]; int ret; char errbuf[1024]; @@ -3644,31 +3644,25 @@ zfs_promote(zfs_handle_t *zhp) return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); } - (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent)); - if (parent[0] == '\0') { + if (zhp->zfs_dmustats.dds_origin[0] == '\0') { zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "not a cloned filesystem")); return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); } - (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin, - sizeof (zc.zc_value)); - (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); - ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc); + ret = lzc_promote(zhp->zfs_name, snapname, sizeof (snapname)); if (ret != 0) { - int save_errno = errno; - - switch (save_errno) { + switch (ret) { case EEXIST: /* There is a conflicting snapshot name. */ zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "conflicting snapshot '%s' from parent '%s'"), - zc.zc_string, parent); + snapname, zhp->zfs_dmustats.dds_origin); return (zfs_error(hdl, EZFS_EXISTS, errbuf)); default: - return (zfs_standard_error(hdl, save_errno, errbuf)); + return (zfs_standard_error(hdl, ret, errbuf)); } } return (ret); diff --git a/lib/libzfs_core/common/libzfs_core.c b/lib/libzfs_core/common/libzfs_core.c index 71e4d5235153..87f7ea4f466a 100644 --- a/lib/libzfs_core/common/libzfs_core.c +++ b/lib/libzfs_core/common/libzfs_core.c @@ -23,6 +23,7 @@ * Copyright (c) 2012, 2014 by Delphix. All rights reserved. * Copyright (c) 2013 Steven Hartland. All rights reserved. * Copyright (c) 2014 Integros [integros.com] + * Copyright 2017 RackTop Systems. */ /* @@ -203,6 +204,28 @@ lzc_clone(const char *fsname, const char *origin, return (error); } +int +lzc_promote(const char *fsname, char *snapnamebuf, int snapnamelen) +{ + /* + * The promote ioctl is still legacy, so we need to construct our + * own zfs_cmd_t rather than using lzc_ioctl(). + */ + zfs_cmd_t zc = { 0 }; + + ASSERT3S(g_refcount, >, 0); + VERIFY3S(g_fd, !=, -1); + + (void) strlcpy(zc.zc_name, fsname, sizeof (zc.zc_name)); + if (ioctl(g_fd, ZFS_IOC_PROMOTE, &zc) != 0) { + int error = errno; + if (error == EEXIST && snapnamebuf != NULL) + (void) strlcpy(snapnamebuf, zc.zc_string, snapnamelen); + return (error); + } + return (0); +} + /* * Creates snapshots. * @@ -330,7 +353,7 @@ lzc_exists(const char *dataset) { /* * The objset_stats ioctl is still legacy, so we need to construct our - * own zfs_cmd_t rather than using zfsc_ioctl(). + * own zfs_cmd_t rather than using lzc_ioctl(). */ zfs_cmd_t zc = { 0 }; diff --git a/lib/libzfs_core/common/libzfs_core.h b/lib/libzfs_core/common/libzfs_core.h index 094fa257e4c3..3d9e14d3da54 100644 --- a/lib/libzfs_core/common/libzfs_core.h +++ b/lib/libzfs_core/common/libzfs_core.h @@ -22,6 +22,7 @@ /* * Copyright (c) 2012, 2014 by Delphix. All rights reserved. * Copyright (c) 2014 Integros [integros.com] + * Copyright 2017 RackTop Systems. */ #ifndef _LIBZFS_CORE_H @@ -49,6 +50,7 @@ enum lzc_dataset_type { int lzc_snapshot(nvlist_t *, nvlist_t *, nvlist_t **); int lzc_create(const char *, enum lzc_dataset_type, nvlist_t *); int lzc_clone(const char *, const char *, nvlist_t *); +int lzc_promote(const char *, char *, int); int lzc_destroy_snaps(nvlist_t *, boolean_t, nvlist_t **); int lzc_bookmark(nvlist_t *, nvlist_t **); int lzc_get_bookmarks(const char *, nvlist_t *, nvlist_t **); -- cgit v1.2.3