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Refactor parent dataset handling in libzfs zfs_rename() 

For recursive renaming, simplify the code by moving `zhrp` and
`parentname` to inner scope. `zhrp` is only used to test existence
of a parent dataset for recursive dataset dir scan since ba6a24026c.

Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Richard Laager <rlaager@wiktel.com>
Reviewed-by: Giuseppe Di Natale <guss80@gmail.com>
Signed-off-by: Tomohiro Kusumi <kusumi.tomohiro@osnexus.com>
Closes #8815
This commit is contained in:
Tomohiro Kusumi 2019-05-29 07:31:39 +09:00 committed by Brian Behlendorf
parent ab1a9705f8
commit 5691b86ce5
1 changed files with 4 additions and 9 deletions
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13
lib/libzfs/libzfs_dataset.c
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@ -4470,8 +4470,6 @@ zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive,
zfs_cmd_t zc = {"\0"};
char *delim;
prop_changelist_t *cl = NULL;
zfs_handle_t *zhrp = NULL;
char *parentname = NULL;
char parent[ZFS_MAX_DATASET_NAME_LEN];
libzfs_handle_t *hdl = zhp->zfs_hdl;
char errbuf[1024];
@ -4566,7 +4564,8 @@ zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive,
}
if (recursive) {
parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
zfs_handle_t *zhrp;
char *parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
if (parentname == NULL) {
ret = -1;
goto error;
@ -4574,10 +4573,12 @@ zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive,
delim = strchr(parentname, '@');
*delim = '\0';
zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
free(parentname);
if (zhrp == NULL) {
ret = -1;
goto error;
}
zfs_close(zhrp);
} else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) {
if ((cl = changelist_gather(zhp, ZFS_PROP_NAME,
CL_GATHER_ITER_MOUNTED,
@ -4650,12 +4651,6 @@ zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive,
}
error:
if (parentname != NULL) {
free(parentname);
}
if (zhrp != NULL) {
zfs_close(zhrp);
}
if (cl != NULL) {
changelist_free(cl);
}