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/*
Copyright (c) 2011-2012 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#ifndef _POSIX_HANDLE_H
#define _POSIX_HANDLE_H
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include "xlator.h"
#include "gf-dirent.h"
#define HANDLE_PFX ".glusterfs"
#define TRASH_DIR "landfill"
#define UUID0_STR "00000000-0000-0000-0000-000000000000"
#define SLEN(str) (sizeof(str) - 1)
#define LOC_HAS_ABSPATH(loc) (loc && (loc->path) && (loc->path[0] == '/'))
#define MAKE_PGFID_XATTR_KEY(var, prefix, pgfid) do { \
var = alloca (strlen (prefix) + UUID_CANONICAL_FORM_LEN + 1); \
strcpy (var, prefix); \
strcat (var, uuid_utoa (pgfid)); \
} while (0)
#define SET_PGFID_XATTR(path, key, value, flags, op_ret, this, label) do { \
value = hton32 (value); \
op_ret = sys_lsetxattr (path, key, &value, sizeof (value), \
flags); \
if (op_ret == -1) { \
op_errno = errno; \
gf_log (this->name, GF_LOG_WARNING, \
"setting xattr failed on %s: key = %s (%s)", \
path, key, strerror (op_errno)); \
goto label; \
} \
} while (0)
#define REMOVE_PGFID_XATTR(path, key, op_ret, this, label) do { \
op_ret = sys_lremovexattr (path, key); \
if (op_ret == -1) { \
op_errno = errno; \
gf_log (this->name, GF_LOG_WARNING, "removing xattr " \
"failed on %s: key = %s (%s)", path, key, \
strerror (op_errno)); \
goto label; \
} \
} while (0)
/* should be invoked holding a lock */
#define LINK_MODIFY_PGFID_XATTR(path, key, value, flags, op_ret, this, label) do { \
op_ret = sys_lgetxattr (path, key, &value, sizeof (value)); \
if (op_ret == -1) { \
op_errno = errno; \
if (op_errno == ENOATTR) { \
value = 1; \
} else { \
gf_log (this->name, GF_LOG_WARNING,"getting xattr " \
"failed on %s: key = %s (%s)", path, key, \
strerror (op_errno)); \
goto label; \
} \
} else { \
value = ntoh32 (value); \
value++; \
} \
SET_PGFID_XATTR (path, key, value, flags, op_ret, this, label); \
} while (0)
/* should be invoked holding a lock */
#define UNLINK_MODIFY_PGFID_XATTR(path, key, value, flags, op_ret, this, label) do { \
op_ret = sys_lgetxattr (path, key, &value, sizeof (value)); \
if (op_ret == -1) { \
op_errno = errno; \
gf_log (this->name, GF_LOG_WARNING, "getting xattr failed on " \
"%s: key = %s (%s)", path, key, strerror (op_errno)); \
goto label; \
} else { \
value = ntoh32 (value); \
value--; \
if (value > 0) { \
SET_PGFID_XATTR (path, key, value, flags, op_ret, \
this, label); \
} else { \
REMOVE_PGFID_XATTR (path, key, op_ret, this, label); \
} \
} \
} while (0)
#define MAKE_REAL_PATH(var, this, path) do { \
var = alloca (strlen (path) + POSIX_BASE_PATH_LEN(this) + 2); \
strcpy (var, POSIX_BASE_PATH(this)); \
strcpy (&var[POSIX_BASE_PATH_LEN(this)], path); \
} while (0)
#define MAKE_HANDLE_PATH(var, this, gfid, base) do { \
int __len; \
__len = posix_handle_path (this, gfid, base, NULL, 0); \
if (__len <= 0) \
break; \
var = alloca (__len); \
__len = posix_handle_path (this, gfid, base, var, __len); \
} while (0)
#define MAKE_HANDLE_GFID_PATH(var, this, gfid, base) do { \
int __len = 0; \
__len = posix_handle_gfid_path (this, gfid, base, NULL, 0); \
if (__len <= 0) \
break; \
var = alloca (__len); \
__len = posix_handle_gfid_path (this, gfid, base, var, __len); \
} while (0)
#define MAKE_HANDLE_RELPATH(var, this, gfid, base) do { \
int __len; \
__len = posix_handle_relpath (this, gfid, base, NULL, 0); \
if (__len <= 0) \
break; \
var = alloca (__len); \
__len = posix_handle_relpath (this, gfid, base, var, __len); \
} while (0)
#define MAKE_INODE_HANDLE(rpath, this, loc, iatt_p) do { \
if (uuid_is_null (loc->gfid)) { \
gf_log (this->name, GF_LOG_ERROR, \
"null gfid for path %s", (loc)->path); \
break; \
} \
if (LOC_HAS_ABSPATH (loc)) { \
MAKE_REAL_PATH (rpath, this, (loc)->path); \
op_ret = posix_pstat (this, (loc)->gfid, rpath, iatt_p); \
break; \
} \
errno = 0; \
op_ret = posix_istat (this, loc->gfid, NULL, iatt_p); \
if (errno != ELOOP) { \
MAKE_HANDLE_PATH (rpath, this, loc->gfid, NULL); \
break; \
} \
/* __ret == -1 && errno == ELOOP */ \
} while (0)
#define MAKE_ENTRY_HANDLE(entp, parp, this, loc, ent_p) do { \
char *__parp; \
\
if (uuid_is_null (loc->pargfid) || !loc->name) { \
gf_log (this->name, GF_LOG_ERROR, \
"null pargfid/name for path %s", loc->path); \
break; \
} \
\
if (LOC_HAS_ABSPATH (loc)) { \
MAKE_REAL_PATH (entp, this, loc->path); \
__parp = strdupa (entp); \
parp = dirname (__parp); \
op_ret = posix_pstat (this, NULL, entp, ent_p); \
break; \
} \
errno = 0; \
op_ret = posix_istat (this, loc->pargfid, loc->name, ent_p); \
if (errno != ELOOP) { \
MAKE_HANDLE_PATH (parp, this, loc->pargfid, NULL); \
MAKE_HANDLE_PATH (entp, this, loc->pargfid, loc->name); \
break; \
} \
/* __ret == -1 && errno == ELOOP */ \
/* expand ELOOP */ \
} while (0)
#define POSIX_ANCESTRY_PATH (1 << 0)
#define POSIX_ANCESTRY_DENTRY (1 << 1)
int
posix_handle_path (xlator_t *this, uuid_t gfid, const char *basename, char *buf,
size_t len);
int
posix_make_ancestryfromgfid (xlator_t *this, char *path, int pathsize,
gf_dirent_t *head, int type, uuid_t gfid,
const size_t handle_size,
const char *priv_base_path,
inode_table_t *table, inode_t **parent,
dict_t *xdata);
int
posix_handle_path_safe (xlator_t *this, uuid_t gfid, const char *basename,
char *buf, size_t len);
int
posix_handle_gfid_path (xlator_t *this, uuid_t gfid, const char *basename,
char *buf, size_t len);
int
posix_handle_hard (xlator_t *this, const char *path, uuid_t gfid,
struct stat *buf);
int
posix_handle_soft (xlator_t *this, const char *real_path, loc_t *loc,
uuid_t gfid, struct stat *buf);
int
posix_handle_unset (xlator_t *this, uuid_t gfid, const char *basename);
int posix_handle_mkdir_hashes (xlator_t *this, const char *newpath);
int posix_handle_init (xlator_t *this);
int posix_create_link_if_gfid_exists (xlator_t *this, uuid_t gfid,
char *real_path);
int
posix_handle_trash_init (xlator_t *this);
#endif /* !_POSIX_HANDLE_H */
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