int
lzc_change_key(const char *fsname, uint64_t crypt_cmd, nvlist_t *props,
uint8_t *wkeydata, uint_t wkeylen)
{
int error;
nvlist_t *ioc_args = fnvlist_alloc();
nvlist_t *hidden_args = NULL;
fnvlist_add_uint64(ioc_args, "crypt_cmd", crypt_cmd);
if (wkeydata != NULL) {
hidden_args = fnvlist_alloc();
fnvlist_add_uint8_array(hidden_args, "wkeydata", wkeydata,
wkeylen);
fnvlist_add_nvlist(ioc_args, ZPOOL_HIDDEN_ARGS, hidden_args);
}
if (props != NULL)
fnvlist_add_nvlist(ioc_args, "props", props);
error = lzc_ioctl(ZFS_IOC_CHANGE_KEY, fsname, ioc_args, NULL);
nvlist_free(hidden_args);
nvlist_free(ioc_args);
return (error);
}
/*
* "from" can be NULL, a snapshot, or a bookmark.
*
* If from is NULL, a full (non-incremental) stream will be estimated. This
* is calculated very efficiently.
*
* If from is a snapshot, lzc_send_space uses the deadlists attached to
* each snapshot to efficiently estimate the stream size.
*
* If from is a bookmark, the indirect blocks in the destination snapshot
* are traversed, looking for blocks with a birth time since the creation TXG of
* the snapshot this bookmark was created from. This will result in
* significantly more I/O and be less efficient than a send space estimation on
* an equivalent snapshot.
*/
int
lzc_send_space(const char *snapname, const char *from,
enum lzc_send_flags flags, uint64_t *spacep)
{
nvlist_t *args;
nvlist_t *result;
int err;
args = fnvlist_alloc();
if (from != NULL)
fnvlist_add_string(args, "from", from);
if (flags & LZC_SEND_FLAG_LARGE_BLOCK)
fnvlist_add_boolean(args, "largeblockok");
if (flags & LZC_SEND_FLAG_EMBED_DATA)
fnvlist_add_boolean(args, "embedok");
if (flags & LZC_SEND_FLAG_COMPRESS)
fnvlist_add_boolean(args, "compressok");
if (flags & LZC_SEND_FLAG_RAW)
fnvlist_add_boolean(args, "rawok");
err = lzc_ioctl(ZFS_IOC_SEND_SPACE, snapname, args, &result);
nvlist_free(args);
if (err == 0)
*spacep = fnvlist_lookup_uint64(result, "space");
nvlist_free(result);
return (err);
}
int
lzc_send_resume(const char *snapname, const char *from, int fd,
enum lzc_send_flags flags, uint64_t resumeobj, uint64_t resumeoff)
{
nvlist_t *args;
int err;
args = fnvlist_alloc();
fnvlist_add_int32(args, "fd", fd);
if (from != NULL)
fnvlist_add_string(args, "fromsnap", from);
if (flags & LZC_SEND_FLAG_LARGE_BLOCK)
fnvlist_add_boolean(args, "largeblockok");
if (flags & LZC_SEND_FLAG_EMBED_DATA)
fnvlist_add_boolean(args, "embedok");
if (flags & LZC_SEND_FLAG_COMPRESS)
fnvlist_add_boolean(args, "compressok");
if (flags & LZC_SEND_FLAG_RAW)
fnvlist_add_boolean(args, "rawok");
if (resumeobj != 0 || resumeoff != 0) {
fnvlist_add_uint64(args, "resume_object", resumeobj);
fnvlist_add_uint64(args, "resume_offset", resumeoff);
}
err = lzc_ioctl(ZFS_IOC_SEND_NEW, snapname, args, NULL);
nvlist_free(args);
return (err);
}
/*
* "from" can be NULL, a snapshot, or a bookmark.
*
* If from is NULL, a full (non-incremental) stream will be estimated. This
* is calculated very efficiently.
*
* If from is a snapshot, lzc_send_space uses the deadlists attached to
* each snapshot to efficiently estimate the stream size.
*
* If from is a bookmark, the indirect blocks in the destination snapshot
* are traversed, looking for blocks with a birth time since the creation TXG of
* the snapshot this bookmark was created from. This will result in
* significantly more I/O and be less efficient than a send space estimation on
* an equivalent snapshot. This process is also used if redact_snaps is
* non-null.
*/
int
lzc_send_space_resume_redacted(const char *snapname, const char *from,
enum lzc_send_flags flags, uint64_t resumeobj, uint64_t resumeoff,
uint64_t resume_bytes, const char *redactbook, int fd, uint64_t *spacep)
{
nvlist_t *args;
nvlist_t *result;
int err;
args = fnvlist_alloc();
if (from != NULL)
fnvlist_add_string(args, "from", from);
if (flags & LZC_SEND_FLAG_LARGE_BLOCK)
fnvlist_add_boolean(args, "largeblockok");
if (flags & LZC_SEND_FLAG_EMBED_DATA)
fnvlist_add_boolean(args, "embedok");
if (flags & LZC_SEND_FLAG_COMPRESS)
fnvlist_add_boolean(args, "compressok");
if (resumeobj != 0 || resumeoff != 0) {
fnvlist_add_uint64(args, "resume_object", resumeobj);
fnvlist_add_uint64(args, "resume_offset", resumeoff);
fnvlist_add_uint64(args, "bytes", resume_bytes);
}
if (redactbook != NULL)
fnvlist_add_string(args, "redactbook", redactbook);
if (fd != -1)
fnvlist_add_int32(args, "fd", fd);
err = lzc_ioctl(ZFS_IOC_SEND_SPACE, snapname, args, &result);
nvlist_free(args);
if (err == 0)
*spacep = fnvlist_lookup_uint64(result, "space");
nvlist_free(result);
return (err);
}
/*
* Creates snapshots.
*
* The keys in the snaps nvlist are the snapshots to be created.
* They must all be in the same pool.
*
* The props nvlist is properties to set. Currently only user properties
* are supported. { user:prop_name -> string value }
*
* The returned results nvlist will have an entry for each snapshot that failed.
* The value will be the (int32) error code.
*
* The return value will be 0 if all snapshots were created, otherwise it will
* be the errno of a (unspecified) snapshot that failed.
*/
int
lzc_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t **errlist)
{
nvpair_t *elem;
nvlist_t *args;
int error;
char pool[MAXNAMELEN];
*errlist = NULL;
/* determine the pool name */
elem = nvlist_next_nvpair(snaps, NULL);
if (elem == NULL)
return (0);
(void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
pool[strcspn(pool, "/@")] = '\0';
args = fnvlist_alloc();
fnvlist_add_nvlist(args, "snaps", snaps);
if (props != NULL)
fnvlist_add_nvlist(args, "props", props);
error = lzc_ioctl(ZFS_IOC_SNAPSHOT, pool, args, errlist);
nvlist_free(args);
return (error);
}
int
lzc_snaprange_space(const char *firstsnap, const char *lastsnap,
uint64_t *usedp)
{
nvlist_t *args;
nvlist_t *result;
int err;
char fs[MAXNAMELEN];
char *atp;
/* determine the fs name */
(void) strlcpy(fs, firstsnap, sizeof (fs));
atp = strchr(fs, '@');
if (atp == NULL)
return (EINVAL);
*atp = '\0';
args = fnvlist_alloc();
fnvlist_add_string(args, "firstsnap", firstsnap);
err = lzc_ioctl(ZFS_IOC_SPACE_SNAPS, lastsnap, args, &result);
nvlist_free(args);
if (err == 0)
*usedp = fnvlist_lookup_uint64(result, "used");
fnvlist_free(result);
return (err);
}
/*
* Destroys snapshots.
*
* The keys in the snaps nvlist are the snapshots to be destroyed.
* They must all be in the same pool.
*
* Snapshots that do not exist will be silently ignored.
*
* If 'defer' is not set, and a snapshot has user holds or clones, the
* destroy operation will fail and none of the snapshots will be
* destroyed.
*
* If 'defer' is set, and a snapshot has user holds or clones, it will be
* marked for deferred destruction, and will be destroyed when the last hold
* or clone is removed/destroyed.
*
* The return value will be 0 if all snapshots were destroyed (or marked for
* later destruction if 'defer' is set) or didn't exist to begin with.
*
* Otherwise the return value will be the errno of a (unspecified) snapshot
* that failed, no snapshots will be destroyed, and the errlist will have an
* entry for each snapshot that failed. The value in the errlist will be
* the (int32) error code.
*/
int
lzc_destroy_snaps(nvlist_t *snaps, boolean_t defer, nvlist_t **errlist)
{
nvpair_t *elem;
nvlist_t *args;
int error;
char pool[MAXNAMELEN];
/* determine the pool name */
elem = nvlist_next_nvpair(snaps, NULL);
if (elem == NULL)
return (0);
(void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
pool[strcspn(pool, "/@")] = '\0';
args = fnvlist_alloc();
fnvlist_add_nvlist(args, "snaps", snaps);
if (defer)
fnvlist_add_boolean(args, "defer");
error = lzc_ioctl(ZFS_IOC_DESTROY_SNAPS, pool, args, errlist);
nvlist_free(args);
return (error);
}
int
lzc_remap(const char *fsname)
{
int error;
nvlist_t *args = fnvlist_alloc();
error = lzc_ioctl(ZFS_IOC_REMAP, fsname, args, NULL);
nvlist_free(args);
return (error);
}
/*
* Retrieve list of user holds on the specified snapshot.
*
* On success, *holdsp will be set to a nvlist which the caller must free.
* The keys are the names of the holds, and the value is the creation time
* of the hold (uint64) in seconds since the epoch.
*/
int
lzc_get_holds(const char *snapname, nvlist_t **holdsp)
{
int error;
nvlist_t *innvl = fnvlist_alloc();
error = lzc_ioctl(ZFS_IOC_GET_HOLDS, snapname, innvl, holdsp);
fnvlist_free(innvl);
return (error);
}
/*
* Create a redaction bookmark named bookname by redacting snapshot with respect
* to all the snapshots in snapnv.
*/
int
lzc_redact(const char *snapshot, const char *bookname, nvlist_t *snapnv)
{
nvlist_t *args = fnvlist_alloc();
fnvlist_add_string(args, "bookname", bookname);
fnvlist_add_nvlist(args, "snapnv", snapnv);
int error = lzc_ioctl(ZFS_IOC_REDACT, snapshot, args, NULL);
fnvlist_free(args);
return (error);
}
/*
* Get bookmark properties.
*
* Given a bookmark's full name, retrieve all properties for the bookmark.
*
* The format of the returned property list is as follows:
* {
* <name of property> -> {
* "value" -> uint64
* }
* ...
* "redact_snaps" -> {
* "value" -> uint64 array
* }
*/
int
lzc_get_bookmark_props(const char *bookmark, nvlist_t **props)
{
int error;
nvlist_t *innvl = fnvlist_alloc();
error = lzc_ioctl(ZFS_IOC_GET_BOOKMARK_PROPS, bookmark, innvl, props);
fnvlist_free(innvl);
return (error);
}
int
lzc_reopen(const char *pool_name, boolean_t scrub_restart)
{
nvlist_t *args = fnvlist_alloc();
int error;
fnvlist_add_boolean_value(args, "scrub_restart", scrub_restart);
error = lzc_ioctl(ZFS_IOC_POOL_REOPEN, pool_name, args, NULL);
nvlist_free(args);
return (error);
}
int
lzc_create(const char *fsname, dmu_objset_type_t type, nvlist_t *props)
{
int error;
nvlist_t *args = fnvlist_alloc();
fnvlist_add_int32(args, "type", type);
if (props != NULL)
fnvlist_add_nvlist(args, "props", props);
error = lzc_ioctl(ZFS_IOC_CREATE, fsname, args, NULL);
nvlist_free(args);
return (error);
}
int
lzc_clone(const char *fsname, const char *origin,
nvlist_t *props)
{
int error;
nvlist_t *args = fnvlist_alloc();
fnvlist_add_string(args, "origin", origin);
if (props != NULL)
fnvlist_add_nvlist(args, "props", props);
error = lzc_ioctl(ZFS_IOC_CLONE, fsname, args, NULL);
nvlist_free(args);
return (error);
}
/*
* If fromsnap is NULL, a full (non-incremental) stream will be sent.
*/
int
lzc_send(const char *snapname, const char *fromsnap, int fd)
{
nvlist_t *args;
int err;
args = fnvlist_alloc();
fnvlist_add_int32(args, "fd", fd);
if (fromsnap != NULL)
fnvlist_add_string(args, "fromsnap", fromsnap);
err = lzc_ioctl(ZFS_IOC_SEND_NEW, snapname, args, NULL);
nvlist_free(args);
return (err);
}
/*
* Roll back this filesystem or volume to the specified snapshot,
* if possible.
*
* Return 0 on success or an errno on failure.
*/
int
lzc_rollback_to(const char *fsname, const char *snapname)
{
nvlist_t *args;
nvlist_t *result;
int err;
args = fnvlist_alloc();
fnvlist_add_string(args, "target", snapname);
err = lzc_ioctl(ZFS_IOC_ROLLBACK, fsname, args, &result);
nvlist_free(args);
nvlist_free(result);
return (err);
}
/*
* Release "user holds" on snapshots. If the snapshot has been marked for
* deferred destroy (by lzc_destroy_snaps(defer=B_TRUE)), it does not have
* any clones, and all the user holds are removed, then the snapshot will be
* destroyed.
*
* The keys in the nvlist are snapshot names.
* The snapshots must all be in the same pool.
* The value is a nvlist whose keys are the holds to remove.
*
* Holds which failed to release because they didn't exist will have an entry
* added to errlist, but will not cause an overall failure.
*
* The return value will be 0 if the nvl holds was empty or all holds that
* existed, were successfully removed.
*
* Otherwise the return value will be the errno of a (unspecified) hold that
* failed to release and no holds will be released.
*
* In all cases the errlist will have an entry for each hold that failed to
* to release.
*/
int
lzc_release(nvlist_t *holds, nvlist_t **errlist)
{
char pool[MAXNAMELEN];
nvpair_t *elem;
/* determine the pool name */
elem = nvlist_next_nvpair(holds, NULL);
if (elem == NULL)
return (0);
(void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
pool[strcspn(pool, "/@")] = '\0';
return (lzc_ioctl(ZFS_IOC_RELEASE, pool, holds, errlist));
}
/*
* Discard the checkpoint from the specified pool.
*
* If this function returns 0 the checkpoint was successfully discarded.
*
* This method may also return:
*
* ZFS_ERR_NO_CHECKPOINT
* The pool does not have a checkpoint.
*
* ZFS_ERR_DISCARDING_CHECKPOINT
* ZFS is already in the middle of discarding the checkpoint.
*/
int
lzc_pool_checkpoint_discard(const char *pool)
{
int error;
nvlist_t *result = NULL;
nvlist_t *args = fnvlist_alloc();
error = lzc_ioctl(ZFS_IOC_POOL_DISCARD_CHECKPOINT, pool, args, &result);
fnvlist_free(args);
fnvlist_free(result);
return (error);
}
/*
* Roll back this filesystem or volume to its most recent snapshot.
* If snapnamebuf is not NULL, it will be filled in with the name
* of the most recent snapshot.
*
* Return 0 on success or an errno on failure.
*/
int
lzc_rollback(const char *fsname, char *snapnamebuf, int snapnamelen)
{
nvlist_t *args;
nvlist_t *result;
int err;
args = fnvlist_alloc();
err = lzc_ioctl(ZFS_IOC_ROLLBACK, fsname, args, &result);
nvlist_free(args);
if (err == 0 && snapnamebuf != NULL) {
const char *snapname = fnvlist_lookup_string(result, "target");
(void) strlcpy(snapnamebuf, snapname, snapnamelen);
}
return (err);
}
/*
* "from" can be NULL, a snapshot, or a bookmark.
*
* If from is NULL, a full (non-incremental) stream will be estimated. This
* is calculated very efficiently.
*
* If from is a snapshot, lzc_send_space uses the deadlists attached to
* each snapshot to efficiently estimate the stream size.
*
* If from is a bookmark, the indirect blocks in the destination snapshot
* are traversed, looking for blocks with a birth time since the creation TXG of
* the snapshot this bookmark was created from. This will result in
* significantly more I/O and be less efficient than a send space estimation on
* an equivalent snapshot.
*/
int
lzc_send_space(const char *snapname, const char *from, uint64_t *spacep)
{
nvlist_t *args;
nvlist_t *result;
int err;
args = fnvlist_alloc();
if (from != NULL)
fnvlist_add_string(args, "from", from);
err = lzc_ioctl(ZFS_IOC_SEND_SPACE, snapname, args, &result);
nvlist_free(args);
if (err == 0)
*spacep = fnvlist_lookup_uint64(result, "space");
nvlist_free(result);
return (err);
}
static int
lzc_channel_program_impl(const char *pool, const char *program, boolean_t sync,
uint64_t instrlimit, uint64_t memlimit, nvlist_t *argnvl, nvlist_t **outnvl)
{
int error;
nvlist_t *args;
args = fnvlist_alloc();
fnvlist_add_string(args, ZCP_ARG_PROGRAM, program);
fnvlist_add_nvlist(args, ZCP_ARG_ARGLIST, argnvl);
fnvlist_add_boolean_value(args, ZCP_ARG_SYNC, sync);
fnvlist_add_uint64(args, ZCP_ARG_INSTRLIMIT, instrlimit);
fnvlist_add_uint64(args, ZCP_ARG_MEMLIMIT, memlimit);
error = lzc_ioctl(ZFS_IOC_CHANNEL_PROGRAM, pool, args, outnvl);
fnvlist_free(args);
return (error);
}
/*
* Destroys bookmarks.
*
* The keys in the bmarks nvlist are the bookmarks to be destroyed.
* They must all be in the same pool. Bookmarks are specified as
* <fs>#<bmark>.
*
* Bookmarks that do not exist will be silently ignored.
*
* The return value will be 0 if all bookmarks that existed were destroyed.
*
* Otherwise the return value will be the errno of a (undetermined) bookmark
* that failed, no bookmarks will be destroyed, and the errlist will have an
* entry for each bookmarks that failed. The value in the errlist will be
* the (int32) error code.
*/
int
lzc_destroy_bookmarks(nvlist_t *bmarks, nvlist_t **errlist)
{
nvpair_t *elem;
int error;
char pool[MAXNAMELEN];
/* determine the pool name */
elem = nvlist_next_nvpair(bmarks, NULL);
if (elem == NULL)
return (0);
(void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
pool[strcspn(pool, "/#")] = '\0';
error = lzc_ioctl(ZFS_IOC_DESTROY_BOOKMARKS, pool, bmarks, errlist);
return (error);
}
/*
* Creates bookmarks.
*
* The bookmarks nvlist maps from name of the bookmark (e.g. "pool/fs#bmark") to
* the name of the snapshot (e.g. "pool/fs@snap"). All the bookmarks and
* snapshots must be in the same pool.
*
* The returned results nvlist will have an entry for each bookmark that failed.
* The value will be the (int32) error code.
*
* The return value will be 0 if all bookmarks were created, otherwise it will
* be the errno of a (undetermined) bookmarks that failed.
*/
int
lzc_bookmark(nvlist_t *bookmarks, nvlist_t **errlist)
{
nvpair_t *elem;
int error;
char pool[ZFS_MAX_DATASET_NAME_LEN];
/* determine the pool name */
elem = nvlist_next_nvpair(bookmarks, NULL);
if (elem == NULL)
return (0);
(void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
pool[strcspn(pool, "/#")] = '\0';
error = lzc_ioctl(ZFS_IOC_BOOKMARK, pool, bookmarks, errlist);
return (error);
}
/*
* Generate a zfs send stream for the specified snapshot and write it to
* the specified file descriptor.
*
* "snapname" is the full name of the snapshot to send (e.g. "pool/fs@snap")
*
* If "from" is NULL, a full (non-incremental) stream will be sent.
* If "from" is non-NULL, it must be the full name of a snapshot or
* bookmark to send an incremental from (e.g. "pool/fs@earlier_snap" or
* "pool/fs#earlier_bmark"). If non-NULL, the specified snapshot or
* bookmark must represent an earlier point in the history of "snapname").
* It can be an earlier snapshot in the same filesystem or zvol as "snapname",
* or it can be the origin of "snapname"'s filesystem, or an earlier
* snapshot in the origin, etc.
*
* "fd" is the file descriptor to write the send stream to.
*
* If "flags" contains LZC_SEND_FLAG_LARGE_BLOCK, the stream is permitted
* to contain DRR_WRITE records with drr_length > 128K, and DRR_OBJECT
* records with drr_blksz > 128K.
*
* If "flags" contains LZC_SEND_FLAG_EMBED_DATA, the stream is permitted
* to contain DRR_WRITE_EMBEDDED records with drr_etype==BP_EMBEDDED_TYPE_DATA,
* which the receiving system must support (as indicated by support
* for the "embedded_data" feature).
*/
int
lzc_send(const char *snapname, const char *from, int fd,
enum lzc_send_flags flags)
{
nvlist_t *args;
int err;
args = fnvlist_alloc();
fnvlist_add_int32(args, "fd", fd);
if (from != NULL)
fnvlist_add_string(args, "fromsnap", from);
if (flags & LZC_SEND_FLAG_LARGE_BLOCK)
fnvlist_add_boolean(args, "largeblockok");
if (flags & LZC_SEND_FLAG_EMBED_DATA)
fnvlist_add_boolean(args, "embedok");
err = lzc_ioctl(ZFS_IOC_SEND_NEW, snapname, args, NULL);
nvlist_free(args);
return (err);
}
/*
* Performs key management functions
*
* crypto_cmd should be a value from zfs_ioc_crypto_cmd_t. If the command
* specifies to load or change a wrapping key, the key should be specified in
* the hidden_args nvlist so that it is not logged
*/
int
lzc_load_key(const char *fsname, boolean_t noop, uint8_t *wkeydata,
uint_t wkeylen)
{
int error;
nvlist_t *ioc_args;
nvlist_t *hidden_args;
if (wkeydata == NULL)
return (EINVAL);
ioc_args = fnvlist_alloc();
hidden_args = fnvlist_alloc();
fnvlist_add_uint8_array(hidden_args, "wkeydata", wkeydata, wkeylen);
fnvlist_add_nvlist(ioc_args, ZPOOL_HIDDEN_ARGS, hidden_args);
if (noop)
fnvlist_add_boolean(ioc_args, "noop");
error = lzc_ioctl(ZFS_IOC_LOAD_KEY, fsname, ioc_args, NULL);
nvlist_free(hidden_args);
nvlist_free(ioc_args);
return (error);
}
int
lzc_create(const char *fsname, enum lzc_dataset_type type, nvlist_t *props,
uint8_t *wkeydata, uint_t wkeylen)
{
int error;
nvlist_t *hidden_args = NULL;
nvlist_t *args = fnvlist_alloc();
fnvlist_add_int32(args, "type", (dmu_objset_type_t)type);
if (props != NULL)
fnvlist_add_nvlist(args, "props", props);
if (wkeydata != NULL) {
hidden_args = fnvlist_alloc();
fnvlist_add_uint8_array(hidden_args, "wkeydata", wkeydata,
wkeylen);
fnvlist_add_nvlist(args, ZPOOL_HIDDEN_ARGS, hidden_args);
}
error = lzc_ioctl(ZFS_IOC_CREATE, fsname, args, NULL);
nvlist_free(hidden_args);
nvlist_free(args);
return (error);
}
/*
* Create "user holds" on snapshots. If there is a hold on a snapshot,
* the snapshot can not be destroyed. (However, it can be marked for deletion
* by lzc_destroy_snaps(defer=B_TRUE).)
*
* The keys in the nvlist are snapshot names.
* The snapshots must all be in the same pool.
* The value is the name of the hold (string type).
*
* If cleanup_fd is not -1, it must be the result of open("/dev/zfs", O_EXCL).
* In this case, when the cleanup_fd is closed (including on process
* termination), the holds will be released. If the system is shut down
* uncleanly, the holds will be released when the pool is next opened
* or imported.
*
* Holds for snapshots which don't exist will be skipped and have an entry
* added to errlist, but will not cause an overall failure.
*
* The return value will be 0 if all holds, for snapshots that existed,
* were succesfully created.
*
* Otherwise the return value will be the errno of a (unspecified) hold that
* failed and no holds will be created.
*
* In all cases the errlist will have an entry for each hold that failed
* (name = snapshot), with its value being the error code (int32).
*/
int
lzc_hold(nvlist_t *holds, int cleanup_fd, nvlist_t **errlist)
{
char pool[MAXNAMELEN];
nvlist_t *args;
nvpair_t *elem;
int error;
/* determine the pool name */
elem = nvlist_next_nvpair(holds, NULL);
if (elem == NULL)
return (0);
(void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
pool[strcspn(pool, "/@")] = '\0';
args = fnvlist_alloc();
fnvlist_add_nvlist(args, "holds", holds);
if (cleanup_fd != -1)
fnvlist_add_int32(args, "cleanup_fd", cleanup_fd);
error = lzc_ioctl(ZFS_IOC_HOLD, pool, args, errlist);
nvlist_free(args);
return (error);
}
/*
* Retrieve bookmarks.
*
* Retrieve the list of bookmarks for the given file system. The props
* parameter is an nvlist of property names (with no values) that will be
* returned for each bookmark.
*
* The following are valid properties on bookmarks, all of which are numbers
* (represented as uint64 in the nvlist)
*
* "guid" - globally unique identifier of the snapshot it refers to
* "createtxg" - txg when the snapshot it refers to was created
* "creation" - timestamp when the snapshot it refers to was created
*
* The format of the returned nvlist as follows:
* <short name of bookmark> -> {
* <name of property> -> {
* "value" -> uint64
* }
* }
*/
int
lzc_get_bookmarks(const char *fsname, nvlist_t *props, nvlist_t **bmarks)
{
return (lzc_ioctl(ZFS_IOC_GET_BOOKMARKS, fsname, props, bmarks));
}
/*
* Retrieve list of user holds on the specified snapshot.
*
* On success, *holdsp will be set to an nvlist which the caller must free.
* The keys are the names of the holds, and the value is the creation time
* of the hold (uint64) in seconds since the epoch.
*/
int
lzc_get_holds(const char *snapname, nvlist_t **holdsp)
{
return (lzc_ioctl(ZFS_IOC_GET_HOLDS, snapname, NULL, holdsp));
}
/*
* Linux adds ZFS_IOC_RECV_NEW for resumable and raw streams and preserves the
* legacy ZFS_IOC_RECV user/kernel interface. The new interface supports all
* stream options but is currently only used for resumable streams. This way
* updated user space utilities will interoperate with older kernel modules.
*
* Non-Linux OpenZFS platforms have opted to modify the legacy interface.
*/
static int
recv_impl(const char *snapname, nvlist_t *recvdprops, nvlist_t *localprops,
const char *origin, boolean_t force, boolean_t resumable, boolean_t raw,
int input_fd, const dmu_replay_record_t *begin_record, int cleanup_fd,
uint64_t *read_bytes, uint64_t *errflags, uint64_t *action_handle,
nvlist_t **errors)
{
dmu_replay_record_t drr;
char fsname[MAXPATHLEN];
char *atp;
int error;
ASSERT3S(g_refcount, >, 0);
VERIFY3S(g_fd, !=, -1);
/* Set 'fsname' to the name of containing filesystem */
(void) strlcpy(fsname, snapname, sizeof (fsname));
atp = strchr(fsname, '@');
if (atp == NULL)
return (EINVAL);
*atp = '\0';
/* If the fs does not exist, try its parent. */
if (!lzc_exists(fsname)) {
char *slashp = strrchr(fsname, '/');
if (slashp == NULL)
return (ENOENT);
*slashp = '\0';
}
/*
* The begin_record is normally a non-byteswapped BEGIN record.
* For resumable streams it may be set to any non-byteswapped
* dmu_replay_record_t.
*/
if (begin_record == NULL) {
error = recv_read(input_fd, &drr, sizeof (drr));
if (error != 0)
return (error);
} else {
drr = *begin_record;
}
if (resumable || raw) {
nvlist_t *outnvl = NULL;
nvlist_t *innvl = fnvlist_alloc();
fnvlist_add_string(innvl, "snapname", snapname);
if (recvdprops != NULL)
fnvlist_add_nvlist(innvl, "props", recvdprops);
if (localprops != NULL)
fnvlist_add_nvlist(innvl, "localprops", localprops);
if (origin != NULL && strlen(origin))
fnvlist_add_string(innvl, "origin", origin);
fnvlist_add_byte_array(innvl, "begin_record",
(uchar_t *)&drr, sizeof (drr));
fnvlist_add_int32(innvl, "input_fd", input_fd);
if (force)
fnvlist_add_boolean(innvl, "force");
if (resumable)
fnvlist_add_boolean(innvl, "resumable");
if (cleanup_fd >= 0)
fnvlist_add_int32(innvl, "cleanup_fd", cleanup_fd);
if (action_handle != NULL)
fnvlist_add_uint64(innvl, "action_handle",
*action_handle);
error = lzc_ioctl(ZFS_IOC_RECV_NEW, fsname, innvl, &outnvl);
if (error == 0 && read_bytes != NULL)
error = nvlist_lookup_uint64(outnvl, "read_bytes",
read_bytes);
if (error == 0 && errflags != NULL)
error = nvlist_lookup_uint64(outnvl, "error_flags",
errflags);
if (error == 0 && action_handle != NULL)
error = nvlist_lookup_uint64(outnvl, "action_handle",
action_handle);
if (error == 0 && errors != NULL) {
nvlist_t *nvl;
error = nvlist_lookup_nvlist(outnvl, "errors", &nvl);
if (error == 0)
*errors = fnvlist_dup(nvl);
}
fnvlist_free(innvl);
fnvlist_free(outnvl);
} else {
zfs_cmd_t zc = {"\0"};
char *packed = NULL;
size_t size;
ASSERT3S(g_refcount, >, 0);
(void) strlcpy(zc.zc_name, fsname, sizeof (zc.zc_value));
(void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
if (recvdprops != NULL) {
packed = fnvlist_pack(recvdprops, &size);
zc.zc_nvlist_src = (uint64_t)(uintptr_t)packed;
zc.zc_nvlist_src_size = size;
}
if (localprops != NULL) {
packed = fnvlist_pack(localprops, &size);
zc.zc_nvlist_conf = (uint64_t)(uintptr_t)packed;
zc.zc_nvlist_conf_size = size;
}
if (origin != NULL)
(void) strlcpy(zc.zc_string, origin,
sizeof (zc.zc_string));
ASSERT3S(drr.drr_type, ==, DRR_BEGIN);
zc.zc_begin_record = drr.drr_u.drr_begin;
zc.zc_guid = force;
zc.zc_cookie = input_fd;
zc.zc_cleanup_fd = -1;
zc.zc_action_handle = 0;
if (cleanup_fd >= 0)
zc.zc_cleanup_fd = cleanup_fd;
if (action_handle != NULL)
zc.zc_action_handle = *action_handle;
zc.zc_nvlist_dst_size = 128 * 1024;
zc.zc_nvlist_dst = (uint64_t)(uintptr_t)
malloc(zc.zc_nvlist_dst_size);
error = ioctl(g_fd, ZFS_IOC_RECV, &zc);
if (error != 0) {
error = errno;
} else {
if (read_bytes != NULL)
*read_bytes = zc.zc_cookie;
if (errflags != NULL)
*errflags = zc.zc_obj;
if (action_handle != NULL)
*action_handle = zc.zc_action_handle;
if (errors != NULL)
VERIFY0(nvlist_unpack(
(void *)(uintptr_t)zc.zc_nvlist_dst,
zc.zc_nvlist_dst_size, errors, KM_SLEEP));
}
if (packed != NULL)
fnvlist_pack_free(packed, size);
free((void *)(uintptr_t)zc.zc_nvlist_dst);
}
return (error);
}
