STORAGE_DRIVER_FS_SOURCES = \
storage/storage_backend_fs.h \
storage/storage_backend_fs.c \
+ storage/storage_file_fs.h \
+ storage/storage_file_fs.c \
$(NULL)
STORAGE_DRIVER_LVM_SOURCES = \
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
-#include <unistd.h>
#include <string.h>
#include "virerror.h"
#include "storage_backend_fs.h"
+#include "storage_file_fs.h"
#include "storage_util.h"
#include "storage_conf.h"
-#include "virstoragefilebackend.h"
#include "vircommand.h"
#include "viralloc.h"
-#include "virxml.h"
#include "virfile.h"
#include "virlog.h"
#include "virstring.h"
#endif /* WITH_STORAGE_FS */
-typedef struct _virStorageFileBackendFsPriv virStorageFileBackendFsPriv;
-typedef virStorageFileBackendFsPriv *virStorageFileBackendFsPrivPtr;
-
-struct _virStorageFileBackendFsPriv {
- char *canonpath; /* unique file identifier (canonical path) */
-};
-
-
-static void
-virStorageFileBackendFileDeinit(virStorageSourcePtr src)
-{
- VIR_DEBUG("deinitializing FS storage file %p (%s:%s)", src,
- virStorageTypeToString(virStorageSourceGetActualType(src)),
- src->path);
-
- virStorageFileBackendFsPrivPtr priv = src->drv->priv;
-
- VIR_FREE(priv->canonpath);
- VIR_FREE(priv);
-}
-
-
-static int
-virStorageFileBackendFileInit(virStorageSourcePtr src)
-{
- virStorageFileBackendFsPrivPtr priv = NULL;
-
- VIR_DEBUG("initializing FS storage file %p (%s:%s)[%u:%u]", src,
- virStorageTypeToString(virStorageSourceGetActualType(src)),
- src->path,
- (unsigned int)src->drv->uid, (unsigned int)src->drv->gid);
-
- if (VIR_ALLOC(priv) < 0)
- return -1;
-
- src->drv->priv = priv;
-
- return 0;
-}
-
-
-static int
-virStorageFileBackendFileCreate(virStorageSourcePtr src)
-{
- int fd = -1;
- mode_t mode = S_IRUSR;
-
- if (!src->readonly)
- mode |= S_IWUSR;
-
- if ((fd = virFileOpenAs(src->path, O_WRONLY | O_TRUNC | O_CREAT, mode,
- src->drv->uid, src->drv->gid, 0)) < 0) {
- errno = -fd;
- return -1;
- }
-
- VIR_FORCE_CLOSE(fd);
- return 0;
-}
-
-
-static int
-virStorageFileBackendFileUnlink(virStorageSourcePtr src)
-{
- return unlink(src->path);
-}
-
-
-static int
-virStorageFileBackendFileStat(virStorageSourcePtr src,
- struct stat *st)
-{
- return stat(src->path, st);
-}
-
-
-static ssize_t
-virStorageFileBackendFileRead(virStorageSourcePtr src,
- size_t offset,
- size_t len,
- char **buf)
-{
- int fd = -1;
- ssize_t ret = -1;
-
- if ((fd = virFileOpenAs(src->path, O_RDONLY, 0,
- src->drv->uid, src->drv->gid, 0)) < 0) {
- virReportSystemError(-fd, _("Failed to open file '%s'"),
- src->path);
- return -1;
- }
-
- if (offset > 0) {
- if (lseek(fd, offset, SEEK_SET) == (off_t) -1) {
- virReportSystemError(errno, _("cannot seek into '%s'"), src->path);
- goto cleanup;
- }
- }
-
- if ((ret = virFileReadHeaderFD(fd, len, buf)) < 0) {
- virReportSystemError(errno,
- _("cannot read header '%s'"), src->path);
- goto cleanup;
- }
-
- cleanup:
- VIR_FORCE_CLOSE(fd);
-
- return ret;
-}
-
-
-static const char *
-virStorageFileBackendFileGetUniqueIdentifier(virStorageSourcePtr src)
-{
- virStorageFileBackendFsPrivPtr priv = src->drv->priv;
-
- if (!priv->canonpath) {
- if (!(priv->canonpath = canonicalize_file_name(src->path))) {
- virReportSystemError(errno, _("can't canonicalize path '%s'"),
- src->path);
- return NULL;
- }
- }
-
- return priv->canonpath;
-}
-
-
-static int
-virStorageFileBackendFileAccess(virStorageSourcePtr src,
- int mode)
-{
- return virFileAccessibleAs(src->path, mode,
- src->drv->uid, src->drv->gid);
-}
-
-
-static int
-virStorageFileBackendFileChown(const virStorageSource *src,
- uid_t uid,
- gid_t gid)
-{
- return chown(src->path, uid, gid);
-}
-
-
-virStorageFileBackend virStorageFileBackendFile = {
- .type = VIR_STORAGE_TYPE_FILE,
-
- .backendInit = virStorageFileBackendFileInit,
- .backendDeinit = virStorageFileBackendFileDeinit,
-
- .storageFileCreate = virStorageFileBackendFileCreate,
- .storageFileUnlink = virStorageFileBackendFileUnlink,
- .storageFileStat = virStorageFileBackendFileStat,
- .storageFileRead = virStorageFileBackendFileRead,
- .storageFileAccess = virStorageFileBackendFileAccess,
- .storageFileChown = virStorageFileBackendFileChown,
-
- .storageFileGetUniqueIdentifier = virStorageFileBackendFileGetUniqueIdentifier,
-};
-
-
-virStorageFileBackend virStorageFileBackendBlock = {
- .type = VIR_STORAGE_TYPE_BLOCK,
-
- .backendInit = virStorageFileBackendFileInit,
- .backendDeinit = virStorageFileBackendFileDeinit,
-
- .storageFileStat = virStorageFileBackendFileStat,
- .storageFileRead = virStorageFileBackendFileRead,
- .storageFileAccess = virStorageFileBackendFileAccess,
- .storageFileChown = virStorageFileBackendFileChown,
-
- .storageFileGetUniqueIdentifier = virStorageFileBackendFileGetUniqueIdentifier,
-};
-
-
-virStorageFileBackend virStorageFileBackendDir = {
- .type = VIR_STORAGE_TYPE_DIR,
-
- .backendInit = virStorageFileBackendFileInit,
- .backendDeinit = virStorageFileBackendFileDeinit,
-
- .storageFileAccess = virStorageFileBackendFileAccess,
- .storageFileChown = virStorageFileBackendFileChown,
-
- .storageFileGetUniqueIdentifier = virStorageFileBackendFileGetUniqueIdentifier,
-};
-
-
int
virStorageBackendFsRegister(void)
{
return -1;
#endif /* WITH_STORAGE_FS */
- if (virStorageFileBackendRegister(&virStorageFileBackendFile) < 0)
- return -1;
-
- if (virStorageFileBackendRegister(&virStorageFileBackendBlock) < 0)
- return -1;
-
- if (virStorageFileBackendRegister(&virStorageFileBackendDir) < 0)
+ if (virStorageFileFsRegister() < 0)
return -1;
return 0;
--- /dev/null
+/*
+ * storage_file_fs.c: storage file code for FS and directory handling
+ *
+ * Copyright (C) 2007-2018 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * Author: Daniel P. Berrange <berrange@redhat.com>
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+
+#include "virerror.h"
+#include "storage_file_fs.h"
+#include "storage_util.h"
+#include "virstoragefilebackend.h"
+#include "vircommand.h"
+#include "viralloc.h"
+#include "virfile.h"
+#include "virlog.h"
+#include "virstring.h"
+
+#define VIR_FROM_THIS VIR_FROM_STORAGE
+
+VIR_LOG_INIT("storage.storage_backend_fs");
+
+
+typedef struct _virStorageFileBackendFsPriv virStorageFileBackendFsPriv;
+typedef virStorageFileBackendFsPriv *virStorageFileBackendFsPrivPtr;
+
+struct _virStorageFileBackendFsPriv {
+ char *canonpath; /* unique file identifier (canonical path) */
+};
+
+
+static void
+virStorageFileBackendFileDeinit(virStorageSourcePtr src)
+{
+ VIR_DEBUG("deinitializing FS storage file %p (%s:%s)", src,
+ virStorageTypeToString(virStorageSourceGetActualType(src)),
+ src->path);
+
+ virStorageFileBackendFsPrivPtr priv = src->drv->priv;
+
+ VIR_FREE(priv->canonpath);
+ VIR_FREE(priv);
+}
+
+
+static int
+virStorageFileBackendFileInit(virStorageSourcePtr src)
+{
+ virStorageFileBackendFsPrivPtr priv = NULL;
+
+ VIR_DEBUG("initializing FS storage file %p (%s:%s)[%u:%u]", src,
+ virStorageTypeToString(virStorageSourceGetActualType(src)),
+ src->path,
+ (unsigned int)src->drv->uid, (unsigned int)src->drv->gid);
+
+ if (VIR_ALLOC(priv) < 0)
+ return -1;
+
+ src->drv->priv = priv;
+
+ return 0;
+}
+
+
+static int
+virStorageFileBackendFileCreate(virStorageSourcePtr src)
+{
+ int fd = -1;
+ mode_t mode = S_IRUSR;
+
+ if (!src->readonly)
+ mode |= S_IWUSR;
+
+ if ((fd = virFileOpenAs(src->path, O_WRONLY | O_TRUNC | O_CREAT, mode,
+ src->drv->uid, src->drv->gid, 0)) < 0) {
+ errno = -fd;
+ return -1;
+ }
+
+ VIR_FORCE_CLOSE(fd);
+ return 0;
+}
+
+
+static int
+virStorageFileBackendFileUnlink(virStorageSourcePtr src)
+{
+ return unlink(src->path);
+}
+
+
+static int
+virStorageFileBackendFileStat(virStorageSourcePtr src,
+ struct stat *st)
+{
+ return stat(src->path, st);
+}
+
+
+static ssize_t
+virStorageFileBackendFileRead(virStorageSourcePtr src,
+ size_t offset,
+ size_t len,
+ char **buf)
+{
+ int fd = -1;
+ ssize_t ret = -1;
+
+ if ((fd = virFileOpenAs(src->path, O_RDONLY, 0,
+ src->drv->uid, src->drv->gid, 0)) < 0) {
+ virReportSystemError(-fd, _("Failed to open file '%s'"),
+ src->path);
+ return -1;
+ }
+
+ if (offset > 0) {
+ if (lseek(fd, offset, SEEK_SET) == (off_t) -1) {
+ virReportSystemError(errno, _("cannot seek into '%s'"), src->path);
+ goto cleanup;
+ }
+ }
+
+ if ((ret = virFileReadHeaderFD(fd, len, buf)) < 0) {
+ virReportSystemError(errno,
+ _("cannot read header '%s'"), src->path);
+ goto cleanup;
+ }
+
+ cleanup:
+ VIR_FORCE_CLOSE(fd);
+
+ return ret;
+}
+
+
+static const char *
+virStorageFileBackendFileGetUniqueIdentifier(virStorageSourcePtr src)
+{
+ virStorageFileBackendFsPrivPtr priv = src->drv->priv;
+
+ if (!priv->canonpath) {
+ if (!(priv->canonpath = canonicalize_file_name(src->path))) {
+ virReportSystemError(errno, _("can't canonicalize path '%s'"),
+ src->path);
+ return NULL;
+ }
+ }
+
+ return priv->canonpath;
+}
+
+
+static int
+virStorageFileBackendFileAccess(virStorageSourcePtr src,
+ int mode)
+{
+ return virFileAccessibleAs(src->path, mode,
+ src->drv->uid, src->drv->gid);
+}
+
+
+static int
+virStorageFileBackendFileChown(const virStorageSource *src,
+ uid_t uid,
+ gid_t gid)
+{
+ return chown(src->path, uid, gid);
+}
+
+
+virStorageFileBackend virStorageFileBackendFile = {
+ .type = VIR_STORAGE_TYPE_FILE,
+
+ .backendInit = virStorageFileBackendFileInit,
+ .backendDeinit = virStorageFileBackendFileDeinit,
+
+ .storageFileCreate = virStorageFileBackendFileCreate,
+ .storageFileUnlink = virStorageFileBackendFileUnlink,
+ .storageFileStat = virStorageFileBackendFileStat,
+ .storageFileRead = virStorageFileBackendFileRead,
+ .storageFileAccess = virStorageFileBackendFileAccess,
+ .storageFileChown = virStorageFileBackendFileChown,
+
+ .storageFileGetUniqueIdentifier = virStorageFileBackendFileGetUniqueIdentifier,
+};
+
+
+virStorageFileBackend virStorageFileBackendBlock = {
+ .type = VIR_STORAGE_TYPE_BLOCK,
+
+ .backendInit = virStorageFileBackendFileInit,
+ .backendDeinit = virStorageFileBackendFileDeinit,
+
+ .storageFileStat = virStorageFileBackendFileStat,
+ .storageFileRead = virStorageFileBackendFileRead,
+ .storageFileAccess = virStorageFileBackendFileAccess,
+ .storageFileChown = virStorageFileBackendFileChown,
+
+ .storageFileGetUniqueIdentifier = virStorageFileBackendFileGetUniqueIdentifier,
+};
+
+
+virStorageFileBackend virStorageFileBackendDir = {
+ .type = VIR_STORAGE_TYPE_DIR,
+
+ .backendInit = virStorageFileBackendFileInit,
+ .backendDeinit = virStorageFileBackendFileDeinit,
+
+ .storageFileAccess = virStorageFileBackendFileAccess,
+ .storageFileChown = virStorageFileBackendFileChown,
+
+ .storageFileGetUniqueIdentifier = virStorageFileBackendFileGetUniqueIdentifier,
+};
+
+
+int
+virStorageFileFsRegister(void)
+{
+ if (virStorageFileBackendRegister(&virStorageFileBackendFile) < 0)
+ return -1;
+
+ if (virStorageFileBackendRegister(&virStorageFileBackendBlock) < 0)
+ return -1;
+
+ if (virStorageFileBackendRegister(&virStorageFileBackendDir) < 0)
+ return -1;
+
+ return 0;
+}
--- /dev/null
+/*
+ * storage_file_fs.h: storage file code for FS and directory handling
+ *
+ * Copyright (C) 2018 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * Author: Daniel P. Berrange <berrange@redhat.com>
+ */
+
+#ifndef __VIR_STORAGE_FILE_FS_H__
+# define __VIR_STORAGE_FILE_FS_H__
+
+int virStorageFileFsRegister(void);
+
+#endif /* __VIR_STORAGE_FILE_FS_H__ */
projects / thirdparty / libvirt.git / commitdiff
