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/*-
* Copyright (c) 2014-2016 MongoDB, Inc.
* Copyright (c) 2008-2014 WiredTiger, Inc.
* All rights reserved.
*
* See the file LICENSE for redistribution information.
*/
/*
* __wt_fs_directory_list --
* Get a list of files from a directory.
*/
static inline int
__wt_fs_directory_list(WT_SESSION_IMPL *session,
const char *dir, const char *prefix, char ***dirlistp, u_int *countp)
{
WT_DECL_RET;
WT_FILE_SYSTEM *file_system;
WT_SESSION *wt_session;
char *path;
*dirlistp = NULL;
*countp = 0;
WT_RET(__wt_verbose(session, WT_VERB_FILEOPS,
"%s: directory-list: %s prefix %s",
dir, prefix == NULL ? "all" : prefix));
WT_RET(__wt_filename(session, dir, &path));
file_system = S2C(session)->file_system;
wt_session = (WT_SESSION *)session;
ret = file_system->directory_list(
file_system, wt_session, path, prefix, dirlistp, countp);
__wt_free(session, path);
return (ret);
}
/*
* __wt_fs_directory_list_free --
* Free memory allocated by __wt_fs_directory_list.
*/
static inline int
__wt_fs_directory_list_free(
WT_SESSION_IMPL *session, char ***dirlistp, u_int count)
{
WT_DECL_RET;
WT_FILE_SYSTEM *file_system;
WT_SESSION *wt_session;
if (*dirlistp != NULL) {
file_system = S2C(session)->file_system;
wt_session = (WT_SESSION *)session;
ret = file_system->directory_list_free(
file_system, wt_session, *dirlistp, count);
}
*dirlistp = NULL;
return (ret);
}
/*
* __wt_fs_directory_sync --
* Flush a directory to ensure file creation is durable.
*/
static inline int
__wt_fs_directory_sync(WT_SESSION_IMPL *session, const char *name)
{
WT_DECL_RET;
WT_FILE_SYSTEM *file_system;
WT_SESSION *wt_session;
char *copy, *dir;
WT_ASSERT(session, !F_ISSET(S2C(session), WT_CONN_READONLY));
WT_RET(__wt_verbose(
session, WT_VERB_FILEOPS, "%s: directory-sync", name));
/*
* POSIX 1003.1 does not require that fsync of a file handle ensures the
* entry in the directory containing the file has also reached disk (and
* there are historic Linux filesystems requiring it). If the underlying
* filesystem method is set, do an explicit fsync on a file descriptor
* for the directory to be sure.
*
* directory-sync is not a required call, no method means the call isn't
* needed.
*/
file_system = S2C(session)->file_system;
if (file_system->directory_sync == NULL)
return (0);
copy = NULL;
if (name == NULL || strchr(name, '/') == NULL)
name = S2C(session)->home;
else {
/*
* File name construction should not return a path without any
* slash separator, but caution isn't unreasonable.
*/
WT_RET(__wt_filename(session, name, ©));
if ((dir = strrchr(copy, '/')) == NULL)
name = S2C(session)->home;
else {
dir[1] = '\0';
name = copy;
}
}
wt_session = (WT_SESSION *)session;
ret = file_system->directory_sync(file_system, wt_session, name);
__wt_free(session, copy);
return (ret);
}
/*
* __wt_fs_exist --
* Return if the file exists.
*/
static inline int
__wt_fs_exist(WT_SESSION_IMPL *session, const char *name, bool *existp)
{
WT_DECL_RET;
WT_FILE_SYSTEM *file_system;
WT_SESSION *wt_session;
char *path;
WT_RET(__wt_verbose(session, WT_VERB_FILEOPS, "%s: file-exist", name));
WT_RET(__wt_filename(session, name, &path));
file_system = S2C(session)->file_system;
wt_session = (WT_SESSION *)session;
ret = file_system->exist(file_system, wt_session, path, existp);
__wt_free(session, path);
return (ret);
}
/*
* __wt_fs_remove --
* POSIX remove.
*/
static inline int
__wt_fs_remove(WT_SESSION_IMPL *session, const char *name)
{
WT_DECL_RET;
WT_FILE_SYSTEM *file_system;
WT_SESSION *wt_session;
char *path;
WT_ASSERT(session, !F_ISSET(S2C(session), WT_CONN_READONLY));
WT_RET(__wt_verbose(session, WT_VERB_FILEOPS, "%s: file-remove", name));
#ifdef HAVE_DIAGNOSTIC
/*
* It is a layering violation to retrieve a WT_FH here, but it is a
* useful diagnostic to ensure WiredTiger doesn't have the handle open.
*/
if (__wt_handle_is_open(session, name))
WT_RET_MSG(session, EINVAL,
"%s: file-remove: file has open handles", name);
#endif
WT_RET(__wt_filename(session, name, &path));
file_system = S2C(session)->file_system;
wt_session = (WT_SESSION *)session;
ret = file_system->remove(file_system, wt_session, path);
__wt_free(session, path);
return (ret);
}
/*
* __wt_fs_rename --
* POSIX rename.
*/
static inline int
__wt_fs_rename(WT_SESSION_IMPL *session, const char *from, const char *to)
{
WT_DECL_RET;
WT_FILE_SYSTEM *file_system;
WT_SESSION *wt_session;
char *from_path, *to_path;
WT_ASSERT(session, !F_ISSET(S2C(session), WT_CONN_READONLY));
WT_RET(__wt_verbose(
session, WT_VERB_FILEOPS, "%s to %s: file-rename", from, to));
#ifdef HAVE_DIAGNOSTIC
/*
* It is a layering violation to retrieve a WT_FH here, but it is a
* useful diagnostic to ensure WiredTiger doesn't have the handle open.
*/
if (__wt_handle_is_open(session, from))
WT_RET_MSG(session, EINVAL,
"%s: file-rename: file has open handles", from);
if (__wt_handle_is_open(session, to))
WT_RET_MSG(session, EINVAL,
"%s: file-rename: file has open handles", to);
#endif
from_path = to_path = NULL;
WT_ERR(__wt_filename(session, from, &from_path));
WT_ERR(__wt_filename(session, to, &to_path));
file_system = S2C(session)->file_system;
wt_session = (WT_SESSION *)session;
ret = file_system->rename(file_system, wt_session, from_path, to_path);
err: __wt_free(session, from_path);
__wt_free(session, to_path);
return (ret);
}
/*
* __wt_fs_size --
* Get the size of a file in bytes, by file name.
*/
static inline int
__wt_fs_size(WT_SESSION_IMPL *session, const char *name, wt_off_t *sizep)
{
WT_DECL_RET;
WT_FILE_SYSTEM *file_system;
WT_SESSION *wt_session;
char *path;
WT_RET(__wt_verbose(session, WT_VERB_FILEOPS, "%s: file-size", name));
WT_RET(__wt_filename(session, name, &path));
file_system = S2C(session)->file_system;
wt_session = (WT_SESSION *)session;
ret = file_system->size(file_system, wt_session, path, sizep);
__wt_free(session, path);
return (ret);
}
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