1 /* $NetBSD: puffs_priv.h,v 1.46 2022/01/22 07:35:26 pho Exp $ */ 2 3 /* 4 * Copyright (c) 2006, 2007, 2008 Antti Kantee. All Rights Reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #ifndef _PUFFS_PRIVATE_H_ 29 #define _PUFFS_PRIVATE_H_ 30 31 #include <sys/types.h> 32 #include <fs/puffs/puffs_msgif.h> 33 34 #include <pthread.h> 35 #include <puffs.h> 36 #include <ucontext.h> 37 38 extern pthread_mutex_t pu_lock; 39 #define PU_LOCK() pthread_mutex_lock(&pu_lock) 40 #define PU_UNLOCK() pthread_mutex_unlock(&pu_lock) 41 42 #define PU_CMAP(pu, c) (pu->pu_cmap ? pu->pu_cmap(pu,c) : (struct puffs_node*)c) 43 44 struct puffs_framectrl { 45 puffs_framev_readframe_fn rfb; 46 puffs_framev_writeframe_fn wfb; 47 puffs_framev_cmpframe_fn cmpfb; 48 puffs_framev_gotframe_fn gotfb; 49 puffs_framev_fdnotify_fn fdnotfn; 50 }; 51 52 struct puffs_fctrl_io { 53 struct puffs_framectrl *fctrl; 54 55 int io_fd; 56 int stat; 57 58 int rwait; 59 int wwait; 60 61 struct puffs_framebuf *cur_in; 62 63 TAILQ_HEAD(, puffs_framebuf) snd_qing; /* queueing to be sent */ 64 TAILQ_HEAD(, puffs_framebuf) res_qing; /* q'ing for rescue */ 65 LIST_HEAD(, puffs_fbevent) ev_qing; /* q'ing for events */ 66 67 LIST_ENTRY(puffs_fctrl_io) fio_entries; 68 }; 69 #define FIO_WR 0x01 70 #define FIO_WRGONE 0x02 71 #define FIO_RDGONE 0x04 72 #define FIO_DEAD 0x08 73 #define FIO_ENABLE_R 0x10 74 #define FIO_ENABLE_W 0x20 75 76 #define FIO_EN_WRITE(fio) \ 77 (!(fio->stat & FIO_WR) \ 78 && ((!TAILQ_EMPTY(&fio->snd_qing) \ 79 && (fio->stat & FIO_ENABLE_W)) \ 80 || fio->wwait)) 81 82 #define FIO_RM_WRITE(fio) \ 83 ((fio->stat & FIO_WR) \ 84 && (((TAILQ_EMPTY(&fio->snd_qing) \ 85 || (fio->stat & FIO_ENABLE_W) == 0)) \ 86 && (fio->wwait == 0))) 87 88 89 /* 90 * usermount: describes one file system instance 91 */ 92 struct puffs_usermount { 93 struct puffs_ops pu_ops; 94 95 int pu_fd; 96 size_t pu_maxreqlen; 97 98 uint32_t pu_flags; 99 int pu_cc_stackshift; 100 101 ucontext_t pu_mainctx; 102 #define PUFFS_CCMAXSTORE 32 103 int pu_cc_nstored; 104 105 int pu_kq; 106 int pu_state; 107 #define PU_STATEMASK 0x00ff 108 #define PU_INLOOP 0x0100 109 #define PU_ASYNCFD 0x0200 110 #define PU_HASKQ 0x0400 111 #define PU_PUFFSDAEMON 0x0800 112 #define PU_MAINRESTORE 0x1000 113 #define PU_DONEXIT 0x2000 114 #define PU_SETSTATE(pu, s) (pu->pu_state = (s) | (pu->pu_state & ~PU_STATEMASK)) 115 #define PU_SETSFLAG(pu, s) (pu->pu_state |= (s)) 116 #define PU_GETSFLAG(pu, s) (pu->pu_state & (s)) 117 #define PU_CLRSFLAG(pu, s) \ 118 (pu->pu_state = ((pu->pu_state & ~(s)) | (pu->pu_state & PU_STATEMASK))) 119 int pu_dpipe[2]; 120 121 struct puffs_node *pu_pn_root; 122 123 LIST_HEAD(, puffs_node) pu_pnodelst; 124 125 LIST_HEAD(, puffs_cc) pu_ccmagazin; 126 TAILQ_HEAD(, puffs_cc) pu_lazyctx; 127 TAILQ_HEAD(, puffs_cc) pu_sched; 128 129 pu_cmap_fn pu_cmap; 130 131 pu_pathbuild_fn pu_pathbuild; 132 pu_pathtransform_fn pu_pathtransform; 133 pu_pathcmp_fn pu_pathcmp; 134 pu_pathfree_fn pu_pathfree; 135 pu_namemod_fn pu_namemod; 136 137 pu_errnotify_fn pu_errnotify; 138 139 pu_prepost_fn pu_oppre; 140 pu_prepost_fn pu_oppost; 141 142 struct puffs_framectrl pu_framectrl[2]; 143 #define PU_FRAMECTRL_FS 0 144 #define PU_FRAMECTRL_USER 1 145 LIST_HEAD(, puffs_fctrl_io) pu_ios; 146 LIST_HEAD(, puffs_fctrl_io) pu_ios_rmlist; 147 struct kevent *pu_evs; 148 size_t pu_nevs; 149 150 puffs_ml_loop_fn pu_ml_lfn; 151 struct timespec pu_ml_timeout; 152 struct timespec *pu_ml_timep; 153 154 struct puffs_kargs *pu_kargp; 155 156 uint64_t pu_nextreq; 157 void *pu_privdata; 158 }; 159 160 /* call context */ 161 162 struct puffs_cc; 163 typedef void (*puffs_ccfunc)(struct puffs_cc *); 164 165 struct puffs_cc { 166 struct puffs_usermount *pcc_pu; 167 struct puffs_framebuf *pcc_pb; 168 169 /* real cc */ 170 union { 171 struct { 172 ucontext_t uc; /* "continue" */ 173 ucontext_t uc_ret; /* "yield" */ 174 } real; 175 struct { 176 puffs_ccfunc func; 177 void *farg; 178 } fake; 179 } pcc_u; 180 181 pid_t pcc_pid; 182 lwpid_t pcc_lid; 183 184 int pcc_flags; 185 186 TAILQ_ENTRY(puffs_cc) pcc_schedent; 187 LIST_ENTRY(puffs_cc) pcc_rope; 188 }; 189 #define pcc_uc pcc_u.real.uc 190 #define pcc_uc_ret pcc_u.real.uc_ret 191 #define pcc_func pcc_u.fake.func 192 #define pcc_farg pcc_u.fake.farg 193 #define PCC_DONE 0x01 194 #define PCC_BORROWED 0x02 195 #define PCC_HASCALLER 0x04 196 #define PCC_MLCONT 0x08 197 198 struct puffs_newinfo { 199 void **pni_cookie; 200 enum vtype *pni_vtype; 201 voff_t *pni_size; 202 dev_t *pni_rdev; 203 struct vattr *pni_va; 204 struct timespec *pni_va_ttl; 205 struct timespec *pni_cn_ttl; 206 }; 207 208 #define PUFFS_MAKEKCRED(to, from) \ 209 /*LINTED: tnilxnaht, the cast is ok */ \ 210 const struct puffs_kcred *to = (const void *)from 211 #define PUFFS_MAKECRED(to, from) \ 212 /*LINTED: tnilxnaht, the cast is ok */ \ 213 const struct puffs_cred *to = (const void *)from 214 #define PUFFS_KCREDTOCRED(to, from) \ 215 /*LINTED: tnilxnaht, the cast is ok */ \ 216 to = (void *)from 217 218 __BEGIN_DECLS 219 220 void puffs__framev_input(struct puffs_usermount *, struct puffs_framectrl *, 221 struct puffs_fctrl_io *); 222 int puffs__framev_output(struct puffs_usermount *, struct puffs_framectrl*, 223 struct puffs_fctrl_io *); 224 void puffs__framev_exit(struct puffs_usermount *); 225 void puffs__framev_readclose(struct puffs_usermount *, 226 struct puffs_fctrl_io *, int); 227 void puffs__framev_writeclose(struct puffs_usermount *, 228 struct puffs_fctrl_io *, int); 229 void puffs__framev_notify(struct puffs_fctrl_io *, int); 230 void *puffs__framebuf_getdataptr(struct puffs_framebuf *); 231 int puffs__framev_addfd_ctrl(struct puffs_usermount *, int, int, 232 struct puffs_framectrl *); 233 void puffs__framebuf_moveinfo(struct puffs_framebuf *, 234 struct puffs_framebuf *); 235 236 void puffs__theloop(struct puffs_cc *); 237 void puffs__ml_dispatch(struct puffs_usermount *, struct puffs_framebuf *); 238 239 int puffs__cc_create(struct puffs_usermount *, puffs_ccfunc, 240 struct puffs_cc **); 241 void puffs__cc_cont(struct puffs_cc *); 242 void puffs__cc_destroy(struct puffs_cc *, int); 243 void puffs__cc_setcaller(struct puffs_cc *, pid_t, lwpid_t); 244 void puffs__goto(struct puffs_cc *); 245 int puffs__cc_savemain(struct puffs_usermount *); 246 int puffs__cc_restoremain(struct puffs_usermount *); 247 void puffs__cc_exit(struct puffs_usermount *); 248 249 int puffs__fsframe_read(struct puffs_usermount *, struct puffs_framebuf *, 250 int, int *); 251 int puffs__fsframe_write(struct puffs_usermount *, struct puffs_framebuf *, 252 int, int *); 253 int puffs__fsframe_cmp(struct puffs_usermount *, struct puffs_framebuf *, 254 struct puffs_framebuf *, int *); 255 void puffs__fsframe_gotframe(struct puffs_usermount *, 256 struct puffs_framebuf *); 257 258 uint64_t puffs__nextreq(struct puffs_usermount *pu); 259 260 __END_DECLS 261 262 #endif /* _PUFFS_PRIVATE_H_ */ 263
Indexes created Sun Sep 21 19:09:51 GMT 2025