Date: Thu, 17 Nov 2016 15:19:28 +0000 (UTC) From: Andriy Gapon <avg@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r308763 - stable/11/cddl/contrib/opensolaris/lib/libzfs_core/common Message-ID: <201611171519.uAHFJSQV072933@repo.freebsd.org>
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Author: avg Date: Thu Nov 17 15:19:27 2016 New Revision: 308763 URL: https://svnweb.freebsd.org/changeset/base/308763 Log: MFC r308247: MFV r308222: 6051 lzc_receive: allow the caller to read the begin record Modified: stable/11/cddl/contrib/opensolaris/lib/libzfs_core/common/libzfs_core.c stable/11/cddl/contrib/opensolaris/lib/libzfs_core/common/libzfs_core.h Directory Properties: stable/11/ (props changed) Modified: stable/11/cddl/contrib/opensolaris/lib/libzfs_core/common/libzfs_core.c ============================================================================== --- stable/11/cddl/contrib/opensolaris/lib/libzfs_core/common/libzfs_core.c Thu Nov 17 15:19:06 2016 (r308762) +++ stable/11/cddl/contrib/opensolaris/lib/libzfs_core/common/libzfs_core.c Thu Nov 17 15:19:27 2016 (r308763) @@ -596,8 +596,9 @@ recv_read(int fd, void *buf, int ilen) } static int -lzc_receive_impl(const char *snapname, nvlist_t *props, const char *origin, - boolean_t force, boolean_t resumable, int fd) +recv_impl(const char *snapname, nvlist_t *props, const char *origin, + boolean_t force, boolean_t resumable, int fd, + const dmu_replay_record_t *begin_record) { /* * The receive ioctl is still legacy, so we need to construct our own @@ -642,9 +643,14 @@ lzc_receive_impl(const char *snapname, n (void) strlcpy(zc.zc_string, origin, sizeof (zc.zc_string)); /* zc_begin_record is non-byteswapped BEGIN record */ - error = recv_read(fd, &zc.zc_begin_record, sizeof (zc.zc_begin_record)); - if (error != 0) - goto out; + if (begin_record == NULL) { + error = recv_read(fd, &zc.zc_begin_record, + sizeof (zc.zc_begin_record)); + if (error != 0) + goto out; + } else { + zc.zc_begin_record = *begin_record; + } /* zc_cookie is fd to read from */ zc.zc_cookie = fd; @@ -685,7 +691,7 @@ int lzc_receive(const char *snapname, nvlist_t *props, const char *origin, boolean_t force, int fd) { - return (lzc_receive_impl(snapname, props, origin, force, B_FALSE, fd)); + return (recv_impl(snapname, props, origin, force, B_FALSE, fd, NULL)); } /* @@ -698,7 +704,29 @@ int lzc_receive_resumable(const char *snapname, nvlist_t *props, const char *origin, boolean_t force, int fd) { - return (lzc_receive_impl(snapname, props, origin, force, B_TRUE, fd)); + return (recv_impl(snapname, props, origin, force, B_TRUE, fd, NULL)); +} + +/* + * Like lzc_receive, but allows the caller to read the begin record and then to + * pass it in. That could be useful if the caller wants to derive, for example, + * the snapname or the origin parameters based on the information contained in + * the begin record. + * The begin record must be in its original form as read from the stream, + * in other words, it should not be byteswapped. + * + * The 'resumable' parameter allows to obtain the same behavior as with + * lzc_receive_resumable. + */ +int +lzc_receive_with_header(const char *snapname, nvlist_t *props, + const char *origin, boolean_t force, boolean_t resumable, int fd, + const dmu_replay_record_t *begin_record) +{ + if (begin_record == NULL) + return (EINVAL); + return (recv_impl(snapname, props, origin, force, resumable, fd, + begin_record)); } /* Modified: stable/11/cddl/contrib/opensolaris/lib/libzfs_core/common/libzfs_core.h ============================================================================== --- stable/11/cddl/contrib/opensolaris/lib/libzfs_core/common/libzfs_core.h Thu Nov 17 15:19:06 2016 (r308762) +++ stable/11/cddl/contrib/opensolaris/lib/libzfs_core/common/libzfs_core.h Thu Nov 17 15:19:27 2016 (r308763) @@ -68,10 +68,15 @@ enum lzc_send_flags { int lzc_send(const char *, const char *, int, enum lzc_send_flags); int lzc_send_resume(const char *, const char *, int, enum lzc_send_flags, uint64_t, uint64_t); +int lzc_send_space(const char *, const char *, uint64_t *); + +struct dmu_replay_record; + int lzc_receive(const char *, nvlist_t *, const char *, boolean_t, int); int lzc_receive_resumable(const char *, nvlist_t *, const char *, boolean_t, int); -int lzc_send_space(const char *, const char *, uint64_t *); +int lzc_receive_with_header(const char *, nvlist_t *, const char *, boolean_t, + boolean_t, int, const struct dmu_replay_record *); boolean_t lzc_exists(const char *);
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