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btrfs-progs: subvolume delete: implement dry-run global option

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Allow user to do dry-run deletion, doing any pre-checks and printing
which subvolumes would be deleted. Lack of access rights can still lead
to errors.

Issue: #629
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2023-10-24 15:33:31 +02:00
parent 39c63831a0
commit e899c5f89c
1 changed files with 7 additions and 2 deletions
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9
cmds/subvolume.c
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@ -313,6 +313,7 @@ static const char * const cmd_subvolume_delete_usage[] = {
HELPINFO_INSERT_GLOBALS,
HELPINFO_INSERT_VERBOSE,
HELPINFO_INSERT_QUIET,
HELPINFO_INSERT_DRY_RUN,
NULL
};
@ -483,6 +484,10 @@ again:
else
pr_verbose(LOG_DEFAULT, "subvolid=%llu\n", subvolid);
if (bconf_is_dry_run())
goto out;
/* Start deleting. */
if (subvolid == 0)
err = btrfs_util_delete_subvolume_fd(fd, vname, 0);
else
@ -540,7 +545,7 @@ keep_fd:
if (cnt < argc)
goto again;
if (commit_mode == COMMIT_AFTER) {
if (commit_mode == COMMIT_AFTER && !bconf_is_dry_run()) {
int slot;
/*
@ -573,7 +578,7 @@ keep_fd:
return ret;
}
static DEFINE_SIMPLE_COMMAND(subvolume_delete, "delete");
static DEFINE_COMMAND_WITH_FLAGS(subvolume_delete, "delete", CMD_DRY_RUN);
static const char * const cmd_subvolume_snapshot_usage[] = {
"btrfs subvolume snapshot [-r] [-i <qgroupid>] <subvolume> { <subdir>/<name> | <subdir> }",