summaryrefslogtreecommitdiffstats
path: root/xlators/storage/posix/src/posix-handle.h
blob: ec4baec5b05e7d5d6d9378f540ff379a3a376895 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
/*
   Copyright (c) 2011 Gluster, Inc. <http://www.gluster.com>
   This file is part of GlusterFS.

   GlusterFS is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published
   by the Free Software Foundation; either version 3 of the License,
   or (at your option) any later version.

   GlusterFS 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
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see
   <http://www.gnu.org/licenses/>.
*/

#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"


#define LOC_HAS_ABSPATH(loc) ((loc) && (loc->path) && (loc->path[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)



int
posix_handle_path (xlator_t *this, uuid_t gfid, const char *basename, char *buf,
                   size_t len);
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);

#endif /* !_POSIX_HANDLE_H */