libfuse

fuse_common.h
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1 /* FUSE: Filesystem in Userspace
2 Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
3
4 This program can be distributed under the terms of the GNU LGPLv2.
5 See the file COPYING.LIB.
6 */
7
10 #if !defined(FUSE_H_) && !defined(FUSE_LOWLEVEL_H_)
11 #error "Never include <fuse_common.h> directly; use <fuse.h> or <fuse_lowlevel.h> instead."
12 #endif
13
14 #ifndef FUSE_COMMON_H_
15 #define FUSE_COMMON_H_
16
17 #ifdef HAVE_LIBFUSE_PRIVATE_CONFIG_H
18 #include "fuse_config.h"
19 #endif
20
21 #include "libfuse_config.h"
22
23 #include "fuse_opt.h"
24 #include "fuse_log.h"
25 #include <stdint.h>
26 #include <sys/types.h>
27
29 #define FUSE_MAJOR_VERSION 3
30
32 #define FUSE_MINOR_VERSION 14
33
34 #define FUSE_MAKE_VERSION(maj, min) ((maj) * 100 + (min))
35 #define FUSE_VERSION FUSE_MAKE_VERSION(FUSE_MAJOR_VERSION, FUSE_MINOR_VERSION)
36
37 #ifdef __cplusplus
38 extern "C" {
39 #endif
40
50 struct fuse_file_info {
52 int flags;
53
60 unsigned int writepage : 1;
61
63 unsigned int direct_io : 1;
64
69 unsigned int keep_cache : 1;
70
73 unsigned int parallel_direct_writes : 1;
74
78 unsigned int flush : 1;
79
82 unsigned int nonseekable : 1;
83
84 /* Indicates that flock locks for this file should be
85 released. If set, lock_owner shall contain a valid value.
86 May only be set in ->release(). */
87 unsigned int flock_release : 1;
88
93 unsigned int cache_readdir : 1;
94
97 unsigned int noflush : 1;
98
100 unsigned int padding : 23;
101 unsigned int padding2 : 32;
102
106 uint64_t fh;
107
109 uint64_t lock_owner;
110
113 uint32_t poll_events;
114 };
115
116
117
124 #if FUSE_USE_VERSION < FUSE_MAKE_VERSION(3, 12)
125 struct fuse_loop_config_v1; /* forward declarition */
126 struct fuse_loop_config {
127 #else
128 struct fuse_loop_config_v1 {
129 #endif
134 int clone_fd;
135
146 unsigned int max_idle_threads;
147 };
148
149
150 /**************************************************************************
151 * Capability bits for 'fuse_conn_info.capable' and 'fuse_conn_info.want' *
152 **************************************************************************/
153
164 #define FUSE_CAP_ASYNC_READ (1 << 0)
165
172 #define FUSE_CAP_POSIX_LOCKS (1 << 1)
173
181 #define FUSE_CAP_ATOMIC_O_TRUNC (1 << 3)
182
188 #define FUSE_CAP_EXPORT_SUPPORT (1 << 4)
189
196 #define FUSE_CAP_DONT_MASK (1 << 6)
197
204 #define FUSE_CAP_SPLICE_WRITE (1 << 7)
205
212 #define FUSE_CAP_SPLICE_MOVE (1 << 8)
213
221 #define FUSE_CAP_SPLICE_READ (1 << 9)
222
234 #define FUSE_CAP_FLOCK_LOCKS (1 << 10)
235
241 #define FUSE_CAP_IOCTL_DIR (1 << 11)
242
263 #define FUSE_CAP_AUTO_INVAL_DATA (1 << 12)
264
271 #define FUSE_CAP_READDIRPLUS (1 << 13)
272
299 #define FUSE_CAP_READDIRPLUS_AUTO (1 << 14)
300
310 #define FUSE_CAP_ASYNC_DIO (1 << 15)
311
319 #define FUSE_CAP_WRITEBACK_CACHE (1 << 16)
320
332 #define FUSE_CAP_NO_OPEN_SUPPORT (1 << 17)
333
342 #define FUSE_CAP_PARALLEL_DIROPS (1 << 18)
343
361 #define FUSE_CAP_POSIX_ACL (1 << 19)
362
370 #define FUSE_CAP_HANDLE_KILLPRIV (1 << 20)
371
383 #define FUSE_CAP_CACHE_SYMLINKS (1 << 23)
384
395 #define FUSE_CAP_NO_OPENDIR_SUPPORT (1 << 24)
396
418 #define FUSE_CAP_EXPLICIT_INVAL_DATA (1 << 25)
419
434 #define FUSE_CAP_EXPIRE_ONLY (1 << 26)
435
446 #define FUSE_IOCTL_COMPAT (1 << 0)
447 #define FUSE_IOCTL_UNRESTRICTED (1 << 1)
448 #define FUSE_IOCTL_RETRY (1 << 2)
449 #define FUSE_IOCTL_DIR (1 << 4)
450
451 #define FUSE_IOCTL_MAX_IOV 256
452
460 struct fuse_conn_info {
464 unsigned proto_major;
465
469 unsigned proto_minor;
470
474 unsigned max_write;
475
488 unsigned max_read;
489
493 unsigned max_readahead;
494
498 unsigned capable;
499
506 unsigned want;
507
536 unsigned max_background;
537
546 unsigned congestion_threshold;
547
563 unsigned time_gran;
564
568 unsigned reserved[22];
569 };
570
571 struct fuse_session;
572 struct fuse_pollhandle;
573 struct fuse_conn_info_opts;
574
617 struct fuse_conn_info_opts* fuse_parse_conn_info_opts(struct fuse_args *args);
618
626 void fuse_apply_conn_info_opts(struct fuse_conn_info_opts *opts,
627 struct fuse_conn_info *conn);
628
635 int fuse_daemonize(int foreground);
636
642 int fuse_version(void);
643
649 const char *fuse_pkgversion(void);
650
656 void fuse_pollhandle_destroy(struct fuse_pollhandle *ph);
657
658 /* ----------------------------------------------------------- *
659 * Data buffer *
660 * ----------------------------------------------------------- */
661
665 enum fuse_buf_flags {
672 FUSE_BUF_IS_FD = (1 << 1),
673
681 FUSE_BUF_FD_SEEK = (1 << 2),
682
690 FUSE_BUF_FD_RETRY = (1 << 3)
691 };
692
696 enum fuse_buf_copy_flags {
706 FUSE_BUF_NO_SPLICE = (1 << 1),
707
714 FUSE_BUF_FORCE_SPLICE = (1 << 2),
715
723 FUSE_BUF_SPLICE_MOVE = (1 << 3),
724
732 FUSE_BUF_SPLICE_NONBLOCK= (1 << 4)
733 };
734
741 struct fuse_buf {
745 size_t size;
746
750 enum fuse_buf_flags flags;
751
757 void *mem;
758
764 int fd;
765
771 off_t pos;
772 };
773
782 struct fuse_bufvec {
786 size_t count;
787
791 size_t idx;
792
796 size_t off;
797
801 struct fuse_buf buf[1];
802 };
803
804 /* Initialize bufvec with a single buffer of given size */
805 #define FUSE_BUFVEC_INIT(size__) \
806 ((struct fuse_bufvec) { \
807 /* .count= */ 1, \
808 /* .idx = */ 0, \
809 /* .off = */ 0, \
810 /* .buf = */ { /* [0] = */ { \
811 /* .size = */ (size__), \
812 /* .flags = */ (enum fuse_buf_flags) 0, \
813 /* .mem = */ NULL, \
814 /* .fd = */ -1, \
815 /* .pos = */ 0, \
816 } } \
817 } )
818
825 size_t fuse_buf_size(const struct fuse_bufvec *bufv);
826
835 ssize_t fuse_buf_copy(struct fuse_bufvec *dst, struct fuse_bufvec *src,
836 enum fuse_buf_copy_flags flags);
837
838 /* ----------------------------------------------------------- *
839 * Signal handling *
840 * ----------------------------------------------------------- */
841
857 int fuse_set_signal_handlers(struct fuse_session *se);
858
870 void fuse_remove_signal_handlers(struct fuse_session *se);
871
877 struct fuse_loop_config *fuse_loop_cfg_create(void);
878
882 void fuse_loop_cfg_destroy(struct fuse_loop_config *config);
883
887 void fuse_loop_cfg_set_idle_threads(struct fuse_loop_config *config,
888 unsigned int value);
889
893 void fuse_loop_cfg_set_max_threads(struct fuse_loop_config *config,
894 unsigned int value);
895
899 void fuse_loop_cfg_set_clone_fd(struct fuse_loop_config *config,
900 unsigned int value);
901
908 void fuse_loop_cfg_convert(struct fuse_loop_config *config,
909 struct fuse_loop_config_v1 *v1_conf);
910
911 /* ----------------------------------------------------------- *
912 * Compatibility stuff *
913 * ----------------------------------------------------------- */
914
915 #if !defined(FUSE_USE_VERSION) || FUSE_USE_VERSION < 30
916 # error only API version 30 or greater is supported
917 #endif
918
919 #ifdef __cplusplus
920 }
921 #endif
922
923
924 /*
925 * This interface uses 64 bit off_t.
926 *
927 * On 32bit systems please add -D_FILE_OFFSET_BITS=64 to your compile flags!
928 */
929
930 #if defined(__GNUC__) && (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ >= 6) && !defined __cplusplus
931 _Static_assert(sizeof(off_t) == 8, "fuse: off_t must be 64bit");
932 #else
933 struct _fuse_off_t_must_be_64bit_dummy_struct \
934 { unsigned _fuse_off_t_must_be_64bit:((sizeof(off_t) == 8) ? 1 : -1); };
935 #endif
936
937 #endif /* FUSE_COMMON_H_ */
fuse_loop_cfg_convert
void fuse_loop_cfg_convert(struct fuse_loop_config *config, struct fuse_loop_config_v1 *v1_conf)
Definition: fuse_loop_mt.c:454
fuse_loop_cfg_set_idle_threads
void fuse_loop_cfg_set_idle_threads(struct fuse_loop_config *config, unsigned int value)
Definition: fuse_loop_mt.c:462
fuse_set_signal_handlers
int fuse_set_signal_handlers(struct fuse_session *se)
Definition: fuse_signals.c:62
fuse_buf_size
size_t fuse_buf_size(const struct fuse_bufvec *bufv)
Definition: buffer.c:22
fuse_apply_conn_info_opts
void fuse_apply_conn_info_opts(struct fuse_conn_info_opts *opts, struct fuse_conn_info *conn)
Definition: helper.c:398
fuse_buf_flags
fuse_buf_flags
Definition: fuse_common.h:665
FUSE_BUF_FD_SEEK
@ FUSE_BUF_FD_SEEK
Definition: fuse_common.h:681
FUSE_BUF_FD_RETRY
@ FUSE_BUF_FD_RETRY
Definition: fuse_common.h:690
FUSE_BUF_IS_FD
@ FUSE_BUF_IS_FD
Definition: fuse_common.h:672
fuse_loop_cfg_create
struct fuse_loop_config * fuse_loop_cfg_create(void)
Definition: fuse_loop_mt.c:427
fuse_loop_cfg_set_clone_fd
void fuse_loop_cfg_set_clone_fd(struct fuse_loop_config *config, unsigned int value)
Definition: fuse_loop_mt.c:482
fuse_buf_copy
ssize_t fuse_buf_copy(struct fuse_bufvec *dst, struct fuse_bufvec *src, enum fuse_buf_copy_flags flags)
Definition: buffer.c:284
fuse_loop_cfg_destroy
void fuse_loop_cfg_destroy(struct fuse_loop_config *config)
Definition: fuse_loop_mt.c:441
fuse_pkgversion
const char * fuse_pkgversion(void)
Definition: fuse.c:5113
fuse_pollhandle_destroy
void fuse_pollhandle_destroy(struct fuse_pollhandle *ph)
Definition: fuse_lowlevel.c:1836
fuse_version
int fuse_version(void)
Definition: fuse.c:5108
fuse_remove_signal_handlers
void fuse_remove_signal_handlers(struct fuse_session *se)
Definition: fuse_signals.c:79
fuse_buf_copy_flags
fuse_buf_copy_flags
Definition: fuse_common.h:696
FUSE_BUF_SPLICE_NONBLOCK
@ FUSE_BUF_SPLICE_NONBLOCK
Definition: fuse_common.h:732
FUSE_BUF_FORCE_SPLICE
@ FUSE_BUF_FORCE_SPLICE
Definition: fuse_common.h:714
FUSE_BUF_NO_SPLICE
@ FUSE_BUF_NO_SPLICE
Definition: fuse_common.h:706
FUSE_BUF_SPLICE_MOVE
@ FUSE_BUF_SPLICE_MOVE
Definition: fuse_common.h:723
fuse_daemonize
int fuse_daemonize(int foreground)
Definition: helper.c:253
fuse_loop_cfg_set_max_threads
void fuse_loop_cfg_set_max_threads(struct fuse_loop_config *config, unsigned int value)
Definition: fuse_loop_mt.c:476
fuse_parse_conn_info_opts
struct fuse_conn_info_opts * fuse_parse_conn_info_opts(struct fuse_args *args)
Definition: helper.c:445
fuse_log.h
fuse_opt.h
fuse_args
Definition: fuse_opt.h:109
fuse_buf
Definition: fuse_common.h:741
fuse_buf::flags
enum fuse_buf_flags flags
Definition: fuse_common.h:750
fuse_buf::mem
void * mem
Definition: fuse_common.h:757
fuse_buf::fd
int fd
Definition: fuse_common.h:764
fuse_buf::pos
off_t pos
Definition: fuse_common.h:771
fuse_bufvec
Definition: fuse_common.h:782
fuse_bufvec::idx
size_t idx
Definition: fuse_common.h:791
fuse_bufvec::count
size_t count
Definition: fuse_common.h:786
fuse_conn_info
Definition: fuse_common.h:460
fuse_conn_info::time_gran
unsigned time_gran
Definition: fuse_common.h:563
fuse_conn_info::congestion_threshold
unsigned congestion_threshold
Definition: fuse_common.h:546
fuse_conn_info::max_background
unsigned max_background
Definition: fuse_common.h:536
fuse_conn_info::proto_major
unsigned proto_major
Definition: fuse_common.h:464
fuse_conn_info::max_read
unsigned max_read
Definition: fuse_common.h:488
fuse_conn_info::proto_minor
unsigned proto_minor
Definition: fuse_common.h:469
fuse_conn_info::capable
unsigned capable
Definition: fuse_common.h:498
fuse_conn_info::max_readahead
unsigned max_readahead
Definition: fuse_common.h:493
fuse_conn_info::max_write
unsigned max_write
Definition: fuse_common.h:474
fuse_conn_info::want
unsigned want
Definition: fuse_common.h:506
fuse_file_info
Definition: fuse_common.h:50
fuse_file_info::direct_io
unsigned int direct_io
Definition: fuse_common.h:63
fuse_file_info::keep_cache
unsigned int keep_cache
Definition: fuse_common.h:69
fuse_file_info::nonseekable
unsigned int nonseekable
Definition: fuse_common.h:82
fuse_file_info::lock_owner
uint64_t lock_owner
Definition: fuse_common.h:109
fuse_file_info::fh
uint64_t fh
Definition: fuse_common.h:106
fuse_file_info::poll_events
uint32_t poll_events
Definition: fuse_common.h:113
fuse_file_info::noflush
unsigned int noflush
Definition: fuse_common.h:97
fuse_file_info::writepage
unsigned int writepage
Definition: fuse_common.h:60
fuse_file_info::flush
unsigned int flush
Definition: fuse_common.h:78
fuse_file_info::padding
unsigned int padding
Definition: fuse_common.h:100
fuse_file_info::parallel_direct_writes
unsigned int parallel_direct_writes
Definition: fuse_common.h:73
fuse_file_info::flags
int flags
Definition: fuse_common.h:52
fuse_file_info::cache_readdir
unsigned int cache_readdir
Definition: fuse_common.h:93
fuse_loop_config
Definition: fuse_common.h:126
fuse_loop_config::clone_fd
int clone_fd
Definition: fuse_common.h:134
fuse_loop_config::max_idle_threads
unsigned int max_idle_threads
Definition: fuse_common.h:146