mirror of
git://sourceware.org/git/lvm2.git
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110 lines
1.9 KiB
C
110 lines
1.9 KiB
C
/*
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* Copyright (C) 2001 Sistina Software (UK) Limited.
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*
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* This file is released under the LGPL.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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#include "fs.h"
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#include "log.h"
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#include <libdevmapper.h>
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void _build_lv_path(char *buffer, size_t len, struct logical_volume *lv)
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{
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snprintf(buffer, len, "%s/%s_%s", dm_dir(), lv->vg->name, lv->name);
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}
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void _build_vg_path(char *buffer, size_t len, struct volume_group *vg)
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{
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snprintf(buffer, len, "%s/%s", vg->cmd->dev_dir, vg->name);
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}
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void _build_link_path(char *buffer, size_t len, struct logical_volume *lv)
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{
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snprintf(buffer, len, "%s/%s/%s", lv->vg->cmd->dev_dir,
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lv->vg->name, lv->name);
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}
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/*
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* Lazy programmer: I'm just going to always try
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* and create/remove the vg directory, and not say
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* anything if it fails.
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*/
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static void _mk_dir(struct volume_group *vg)
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{
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char vg_path[PATH_MAX];
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_build_vg_path(vg_path, sizeof(vg_path), vg);
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mkdir(vg_path, 0555);
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}
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static void _rm_dir(struct volume_group *vg)
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{
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char vg_path[PATH_MAX];
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_build_vg_path(vg_path, sizeof(vg_path), vg);
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rmdir(vg_path);
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}
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static int _mk_link(struct logical_volume *lv)
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{
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char lv_path[PATH_MAX], link_path[PATH_MAX];
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_build_lv_path(lv_path, sizeof(lv_path), lv);
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_build_link_path(link_path, sizeof(link_path), lv);
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if (symlink(lv_path, link_path) < 0) {
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log_sys_error("symlink", link_path);
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return 0;
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}
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return 1;
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}
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static int _rm_link(struct logical_volume *lv)
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{
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char link_path[PATH_MAX];
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_build_link_path(link_path, sizeof(link_path), lv);
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if (unlink(link_path) < 0) {
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log_sys_error("unlink", link_path);
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return 0;
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}
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return 1;
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}
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int fs_add_lv(struct logical_volume *lv)
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{
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_mk_dir(lv->vg);
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if (!_mk_link(lv)) {
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stack;
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return 0;
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}
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return 1;
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}
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int fs_del_lv(struct logical_volume *lv)
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{
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if (!_rm_link(lv)) {
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stack;
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return 0;
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}
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_rm_dir(lv->vg);
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return 1;
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}
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