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Upstream: unmount snapshots before destroying them on macOS

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Add function zfs_destroy_snaps_nvl_os() call. The main issue is that
macOS needs to unmount any mounted snapshots before they can be
destroyed. Other platforms can handle this in the kernel, but sending
a storm of zed events to unmount seems undesirable when we can do it
in userland to start with.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: John Kennedy <john.kennedy@delphix.com>
Signed-off-by: Jorgen Lundman <lundman@lundman.net>
Co-authored-by: ilovezfs <ilovezfs@icloud.com>
Closes #12550
This commit is contained in:
Jorgen Lundman 2021-09-21 00:29:59 +09:00 committed by GitHub
parent 8a3fe59c03
commit 1d901c3ee5
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 23 additions and 1 deletions
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1
include/libzfs.h
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@ -650,6 +650,7 @@ _LIBZFS_H int zfs_create_ancestors(libzfs_handle_t *, const char *);
_LIBZFS_H int zfs_destroy(zfs_handle_t *, boolean_t);
_LIBZFS_H int zfs_destroy_snaps(zfs_handle_t *, char *, boolean_t);
_LIBZFS_H int zfs_destroy_snaps_nvl(libzfs_handle_t *, nvlist_t *, boolean_t);
_LIBZFS_H int zfs_destroy_snaps_nvl_os(libzfs_handle_t *, nvlist_t *);
_LIBZFS_H int zfs_clone(zfs_handle_t *, const char *, nvlist_t *);
_LIBZFS_H int zfs_snapshot(libzfs_handle_t *, const char *, boolean_t,
nvlist_t *);

6
lib/libzfs/libzfs.abi
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@ -97,6 +97,7 @@
<elf-symbol name='zfs_destroy' type='func-type' binding='global-binding' visibility='default-visibility' is-defined='yes'/>
<elf-symbol name='zfs_destroy_snaps' type='func-type' binding='global-binding' visibility='default-visibility' is-defined='yes'/>
<elf-symbol name='zfs_destroy_snaps_nvl' type='func-type' binding='global-binding' visibility='default-visibility' is-defined='yes'/>
<elf-symbol name='zfs_destroy_snaps_nvl_os' type='func-type' binding='global-binding' visibility='default-visibility' is-defined='yes'/>
<elf-symbol name='zfs_expand_proplist' type='func-type' binding='global-binding' visibility='default-visibility' is-defined='yes'/>
<elf-symbol name='zfs_foreach_mountpoint' type='func-type' binding='global-binding' visibility='default-visibility' is-defined='yes'/>
<elf-symbol name='zfs_get_all_props' type='func-type' binding='global-binding' visibility='default-visibility' is-defined='yes'/>
@ -4161,6 +4162,11 @@
<parameter type-id='95e97e5e' name='len'/>
<return type-id='95e97e5e'/>
</function-decl>
<function-decl name='zfs_destroy_snaps_nvl_os' mangled-name='zfs_destroy_snaps_nvl_os' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='zfs_destroy_snaps_nvl_os'>
<parameter type-id='b0382bb3' name='hdl'/>
<parameter type-id='5ce45b60' name='snaps'/>
<return type-id='95e97e5e'/>
</function-decl>
<function-decl name='libzfs_error_init' mangled-name='libzfs_error_init' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='libzfs_error_init'>
<parameter type-id='95e97e5e' name='error'/>
<return type-id='80f4b756'/>

5
lib/libzfs/libzfs_dataset.c
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@ -3884,10 +3884,13 @@ zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
int
zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
{
int ret;
nvlist_t *errlist = NULL;
nvpair_t *pair;
int ret = zfs_destroy_snaps_nvl_os(hdl, snaps);
if (ret != 0)
return (ret);
ret = lzc_destroy_snaps(snaps, defer, &errlist);
if (ret == 0) {

6
lib/libzfs/os/freebsd/libzfs_compat.c
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@ -267,6 +267,12 @@ find_shares_object(differ_info_t *di)
return (0);
}
int
zfs_destroy_snaps_nvl_os(libzfs_handle_t *hdl, nvlist_t *snaps)
{
return (0);
}
/*
* Attach/detach the given filesystem to/from the given jail.
*/

6
lib/libzfs/os/linux/libzfs_util_os.c
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@ -184,6 +184,12 @@ find_shares_object(differ_info_t *di)
return (0);
}
int
zfs_destroy_snaps_nvl_os(libzfs_handle_t *hdl, nvlist_t *snaps)
{
return (0);
}
/*
* Fill given version buffer with zfs kernel version read from ZFS_SYSFS_DIR
* Returns 0 on success, and -1 on error (with errno set)