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
|
/*
Copyright (C) 2012 - 2015 Andreas Baumann <mail@andreasbaumann.cc>
This program 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.
This program 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 PGSQL_H
#define PGSQL_H
#include <sys/types.h> /* size_t */
#include <sys/time.h> /* for struct timespec */
#include <sys/stat.h> /* mode_t */
#include <stdint.h> /* for uint64_t */
#include <fuse.h> /* for user-land filesystem */
#include <libpq-fe.h> /* for Postgresql database access */
/* --- metadata stored about a file/directory/synlink --- */
typedef struct PgMeta {
int64_t size; /* the size of the file (naturally the bigint on PostgreSQL) */
mode_t mode; /* type and permissions of file/directory */
uid_t uid; /* owner of the file/directory */
gid_t gid; /* group owner of the file/directory */
struct timespec ctime; /* last status change time */
struct timespec mtime; /* last modification time */
struct timespec atime; /* last access time */
int64_t parent_id; /* id/inode_no of parenting directory */
} PgMeta;
/* --- transaction management and policies --- */
#define PSQL_BEGIN( T ) \
{ \
int __res; \
__res = psql_begin( T ); \
if( __res < 0 ) return __res; \
}
#define PSQL_COMMIT( T ) \
{ \
int __res; \
__res = psql_commit( T ); \
if( __res < 0 ) return __res; \
}
#define PSQL_ROLLBACK( T ) \
{ \
int __res; \
__res = psql_rollback( T ); \
if( __res < 0 ) return __res; \
}
int psql_begin( PGconn *conn );
int psql_commit( PGconn *conn );
int psql_rollback( PGconn *conn );
/* --- the filesystem functions --- */
int64_t psql_path_to_id( PGconn *conn, const char *path );
int64_t psql_read_meta( PGconn *conn, const int64_t id, const char *path, PgMeta *meta );
int64_t psql_read_meta_from_path( PGconn *conn, const char *path, PgMeta *meta );
int psql_write_meta( PGconn *conn, const int64_t id, const char *path, PgMeta meta );
int psql_create_file( PGconn *conn, const int64_t parent_id, const char *path, const char *new_file, PgMeta meta );
int psql_read_buf( PGconn *conn, const size_t block_size, const int64_t id, const char *path, char *buf, const off_t offset, const size_t len, int verbose );
int psql_readdir( PGconn *conn, const int64_t parent_id, void *buf, fuse_fill_dir_t filler );
int psql_create_dir( PGconn *conn, const int64_t parent_id, const char *path, const char *new_dir, PgMeta meta );
int psql_delete_dir( PGconn *conn, const int64_t id, const char *path );
int psql_delete_file( PGconn *conn, const int64_t id, const char *path );
int psql_write_buf( PGconn *conn, const size_t block_size, const int64_t id, const char *path, const char *buf, const off_t offset, const size_t len, int verbose );
int psql_truncate( PGconn *conn, const size_t block_size, const int64_t id, const char *path, const off_t offset );
int psql_rename( PGconn *conn, const int64_t from_id, const int64_t from_parent_id, const int64_t to_parent_id, const char *rename_to, const char *from, const char *to );
int psql_rename_to_existing_file( PGconn *conn, const int64_t from_id, const int64_t to_id, const char *from_path, const char *to_path );
size_t psql_get_block_size( PGconn *conn, const size_t block_size );
int64_t psql_get_fs_blocks_used( PGconn *conn );
int psql_get_tablespace_locations( PGconn *conn, char **location, size_t *nof_oids, int verbose );
int64_t psql_get_fs_files_used( PGconn *conn );
#endif
|
