libfuse
fuse_i.h
1 /*
2  FUSE: Filesystem in Userspace
3  Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
4 
5  This program can be distributed under the terms of the GNU LGPLv2.
6  See the file COPYING.LIB
7 */
8 
9 #include "fuse.h"
10 #include "fuse_lowlevel.h"
11 
12 struct mount_opts;
13 
14 struct fuse_req {
15  struct fuse_session *se;
16  uint64_t unique;
17  int ctr;
18  pthread_mutex_t lock;
19  struct fuse_ctx ctx;
20  struct fuse_chan *ch;
21  int interrupted;
22  unsigned int ioctl_64bit : 1;
23  union {
24  struct {
25  uint64_t unique;
26  } i;
27  struct {
29  void *data;
30  } ni;
31  } u;
32  struct fuse_req *next;
33  struct fuse_req *prev;
34 };
35 
36 struct fuse_notify_req {
37  uint64_t unique;
38  void (*reply)(struct fuse_notify_req *, fuse_req_t, fuse_ino_t,
39  const void *, const struct fuse_buf *);
40  struct fuse_notify_req *next;
41  struct fuse_notify_req *prev;
42 };
43 
44 struct fuse_session {
45  char *mountpoint;
46  volatile int exited;
47  int fd;
48  struct fuse_custom_io *io;
49  struct mount_opts *mo;
50  int debug;
51  int deny_others;
52  struct fuse_lowlevel_ops op;
53  int got_init;
54  struct cuse_data *cuse_data;
55  void *userdata;
56  uid_t owner;
57  struct fuse_conn_info conn;
58  struct fuse_req list;
59  struct fuse_req interrupts;
60  pthread_mutex_t lock;
61  int got_destroy;
62  pthread_key_t pipe_key;
63  int broken_splice_nonblock;
64  uint64_t notify_ctr;
65  struct fuse_notify_req notify_list;
66  size_t bufsize;
67  int error;
68 };
69 
70 struct fuse_chan {
71  pthread_mutex_t lock;
72  int ctr;
73  int fd;
74 };
75 
83 struct fuse_module {
84  char *name;
85  fuse_module_factory_t factory;
86  struct fuse_module *next;
87  struct fusemod_so *so;
88  int ctr;
89 };
90 
99 #if FUSE_USE_VERSION >= FUSE_MAKE_VERSION(3, 12)
100 struct fuse_loop_config
101 {
102  /* verififier that a correct struct was was passed. This is especially
103  * needed, as versions below (3, 12) were using a public struct
104  * (now called fuse_loop_config_v1), which was hard to extend with
105  * additional parameters, without risking that file system implementations
106  * would not have noticed and might either pass uninitialized members
107  * or even too small structs.
108  * fuse_loop_config_v1 has clone_fd at this offset, which should be either 0
109  * or 1. v2 or even higher version just need to set a value here
110  * which not conflicting and very unlikely as having been set by
111  * file system implementation.
112  */
113  int version_id;
114 
119  int clone_fd;
131  int max_idle_threads;
132 
138  unsigned int max_threads;
139 };
140 #endif
141 
142 /* ----------------------------------------------------------- *
143  * Channel interface (when using -o clone_fd) *
144  * ----------------------------------------------------------- */
145 
152 struct fuse_chan *fuse_chan_get(struct fuse_chan *ch);
153 
159 void fuse_chan_put(struct fuse_chan *ch);
160 
161 struct mount_opts *parse_mount_opts(struct fuse_args *args);
162 void destroy_mount_opts(struct mount_opts *mo);
163 void fuse_mount_version(void);
164 unsigned get_max_read(struct mount_opts *o);
165 void fuse_kern_unmount(const char *mountpoint, int fd);
166 int fuse_kern_mount(const char *mountpoint, struct mount_opts *mo);
167 
168 int fuse_send_reply_iov_nofree(fuse_req_t req, int error, struct iovec *iov,
169  int count);
170 void fuse_free_req(fuse_req_t req);
171 
172 void cuse_lowlevel_init(fuse_req_t req, fuse_ino_t nodeide, const void *inarg);
173 
174 int fuse_start_thread(pthread_t *thread_id, void *(*func)(void *), void *arg);
175 
176 int fuse_session_receive_buf_int(struct fuse_session *se, struct fuse_buf *buf,
177  struct fuse_chan *ch);
178 void fuse_session_process_buf_int(struct fuse_session *se,
179  const struct fuse_buf *buf, struct fuse_chan *ch);
180 
181 struct fuse *fuse_new_31(struct fuse_args *args, const struct fuse_operations *op,
182  size_t op_size, void *private_data);
183 int fuse_loop_mt_312(struct fuse *f, struct fuse_loop_config *config);
184 int fuse_session_loop_mt_312(struct fuse_session *se, struct fuse_loop_config *config);
185 
191 int fuse_loop_cfg_verify(struct fuse_loop_config *config);
192 
193 
194 #define FUSE_MAX_MAX_PAGES 256
195 #define FUSE_DEFAULT_MAX_PAGES_PER_REQ 32
196 
197 /* room needed in buffer to accommodate header */
198 #define FUSE_BUFFER_HEADER_SIZE 0x1000
199 
struct fuse * fuse_new_31(struct fuse_args *args, const struct fuse_operations *op, size_t op_size, void *user_data)
Definition: fuse.c:4872
struct fuse_fs *(* fuse_module_factory_t)(struct fuse_args *args, struct fuse_fs *fs[])
Definition: fuse.h:1308
void(* fuse_interrupt_func_t)(fuse_req_t req, void *data)
struct fuse_req * fuse_req_t
Definition: fuse_lowlevel.h:49
uint64_t fuse_ino_t
Definition: fuse_lowlevel.h:46
unsigned int max_threads
Definition: fuse_i.h:138
unsigned int max_idle_threads
Definition: fuse_common.h:146