/* $NetBSD: puffs.h,v 1.38 2007/03/22 16:57:27 pooka Exp $ */ /* * Copyright (c) 2005, 2006 Antti Kantee. All Rights Reserved. * * Development of this software was supported by the * Google Summer of Code program and the Ulla Tuominen Foundation. * The Google SoC project was mentored by Bill Studenmund. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the company nor the name of the author may be used to * endorse or promote products derived from this software without specific * prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef _PUFFS_H_ #define _PUFFS_H_ #include #include #include #include #include #include #include #include #include /* forwards */ struct puffs_cc; struct puffs_getreq; struct puffs_putreq; /* paths */ struct puffs_pathobj { void *po_path; size_t po_len; }; /* for prefix rename */ struct puffs_pathinfo { struct puffs_pathobj *pi_old; struct puffs_pathobj *pi_new; }; /* describes one segment cached in the kernel */ struct puffs_kcache { off_t pkc_start; off_t pkc_end; LIST_ENTRY(puffs_kcache) pkc_entries; }; /* XXX: might disappear from here into a private header */ struct puffs_node { off_t pn_size; int pn_flag; struct vattr pn_va; void *pn_data; /* private data */ struct puffs_pathobj pn_po; /* PUFFS_FLAG_BUILDPATH */ struct puffs_usermount *pn_mnt; LIST_ENTRY(puffs_node) pn_entries; LIST_HEAD(,puffs_kcache)pn_cacheinfo; /* PUFFS_KFLAG_CACHE */ }; struct puffs_usermount; /* * megaXXX: these are values from inside _KERNEL * need to work on the translation for ALL the necessary values. */ #define PUFFS_VNOVAL (-1) #define PUFFS_IO_APPEND 0x20 #define PUFFS_VEXEC 01 #define PUFFS_VWRITE 02 #define PUFFS_VREAD 04 #define PUFFS_FSYNC_DATAONLY 0x0002 #define PUFFS_FSYNC_CACHE 0x0100 /* * Magic constants */ #define PUFFS_CC_STACKSIZE_DEFAULT (1024*1024) struct puffs_cn { struct puffs_kcn *pcn_pkcnp; /* kernel input */ struct puffs_pathobj pcn_po_full; /* PUFFS_FLAG_BUILDPATH */ }; #define pcn_nameiop pcn_pkcnp->pkcn_nameiop #define pcn_flags pcn_pkcnp->pkcn_flags #define pcn_pid pcn_pkcnp->pkcn_pid #define pcn_cred pcn_pkcnp->pkcn_cred #define pcn_name pcn_pkcnp->pkcn_name #define pcn_namelen pcn_pkcnp->pkcn_namelen /* * Puffs options to mount */ /* kernel */ #define PUFFSMOPT_CACHE { "cache", 1, PUFFS_KFLAG_NOCACHE, 1 } #define PUFFSMOPT_ALLOPS { "allops", 0, PUFFS_KFLAG_ALLOPS, 1 } /* libpuffs */ #define PUFFSMOPT_DUMP { "dump", 0, PUFFS_FLAG_OPDUMP, 1 } #define PUFFSMOPT_STD \ PUFFSMOPT_CACHE, \ PUFFSMOPT_ALLOPS, \ PUFFSMOPT_DUMP extern const struct mntopt puffsmopts[]; /* puffs.c */ /* callbacks for operations */ struct puffs_ops { int (*puffs_fs_unmount)(struct puffs_cc *, int, pid_t); int (*puffs_fs_statvfs)(struct puffs_cc *, struct statvfs *, pid_t); int (*puffs_fs_sync)(struct puffs_cc *, int, const struct puffs_cred *, pid_t); void (*puffs_fs_suspend)(struct puffs_cc *, int); int (*puffs_node_lookup)(struct puffs_cc *, void *, void **, enum vtype *, voff_t *, dev_t *, const struct puffs_cn *); int (*puffs_node_create)(struct puffs_cc *, void *, void **, const struct puffs_cn *, const struct vattr *); int (*puffs_node_mknod)(struct puffs_cc *, void *, void **, const struct puffs_cn *, const struct vattr *); int (*puffs_node_open)(struct puffs_cc *, void *, int, const struct puffs_cred *, pid_t); int (*puffs_node_close)(struct puffs_cc *, void *, int, const struct puffs_cred *, pid_t); int (*puffs_node_access)(struct puffs_cc *, void *, int, const struct puffs_cred *, pid_t); int (*puffs_node_getattr)(struct puffs_cc *, void *, struct vattr *, const struct puffs_cred *, pid_t); int (*puffs_node_setattr)(struct puffs_cc *, void *, const struct vattr *, const struct puffs_cred *, pid_t); int (*puffs_node_poll)(struct puffs_cc *, void *, struct puffs_vnreq_poll *); int (*puffs_node_mmap)(struct puffs_cc *, void *, int, const struct puffs_cred *, pid_t); int (*puffs_node_fsync)(struct puffs_cc *, void *, const struct puffs_cred *, int, off_t, off_t, pid_t); int (*puffs_node_seek)(struct puffs_cc *, void *, off_t, off_t, const struct puffs_cred *); int (*puffs_node_remove)(struct puffs_cc *, void *, void *, const struct puffs_cn *); int (*puffs_node_link)(struct puffs_cc *, void *, void *, const struct puffs_cn *); int (*puffs_node_rename)(struct puffs_cc *, void *, void *, const struct puffs_cn *, void *, void *, const struct puffs_cn *); int (*puffs_node_mkdir)(struct puffs_cc *, void *, void **, const struct puffs_cn *, const struct vattr *); int (*puffs_node_rmdir)(struct puffs_cc *, void *, void *, const struct puffs_cn *); int (*puffs_node_symlink)(struct puffs_cc *, void *, void **, const struct puffs_cn *, const struct vattr *, const char *); int (*puffs_node_readdir)(struct puffs_cc *, void *, struct dirent *, const struct puffs_cred *, off_t *, size_t *); int (*puffs_node_readlink)(struct puffs_cc *, void *, const struct puffs_cred *, char *, size_t *); int (*puffs_node_reclaim)(struct puffs_cc *, void *, pid_t); int (*puffs_node_inactive)(struct puffs_cc *, void *, pid_t, int *); int (*puffs_node_print)(struct puffs_cc *, void *); int (*puffs_node_pathconf)(struct puffs_cc *, void *, int, int *); int (*puffs_node_advlock)(struct puffs_cc *, void *, void *, int, struct flock *, int); int (*puffs_node_getextattr)(struct puffs_cc *, void *, struct puffs_vnreq_getextattr *); int (*puffs_node_setextattr)(struct puffs_cc *, void *, struct puffs_vnreq_setextattr *); int (*puffs_node_listextattr)(struct puffs_cc *, void *, struct puffs_vnreq_listextattr *); int (*puffs_node_read)(struct puffs_cc *, void *, uint8_t *, off_t, size_t *, const struct puffs_cred *, int); int (*puffs_node_write)(struct puffs_cc *, void *, uint8_t *, off_t, size_t *, const struct puffs_cred *, int); int (*puffs_cache_write)(struct puffs_usermount *, void *, size_t, struct puffs_cacherun *); }; typedef int (*pu_pathbuild_fn)(struct puffs_usermount *, const struct puffs_pathobj *, const struct puffs_pathobj *, size_t, struct puffs_pathobj *); typedef int (*pu_pathtransform_fn)(struct puffs_usermount *, const struct puffs_pathobj *, const struct puffs_cn *, struct puffs_pathobj *); typedef int (*pu_pathcmp_fn)(struct puffs_usermount *, struct puffs_pathobj *, struct puffs_pathobj *, size_t, int); typedef void (*pu_pathfree_fn)(struct puffs_usermount *, struct puffs_pathobj *); typedef int (*pu_namemod_fn)(struct puffs_usermount *, struct puffs_pathobj *, struct puffs_cn *); struct puffs_usermount { struct puffs_ops pu_ops; int pu_fd; uint32_t pu_flags; size_t pu_maxreqlen; size_t pu_cc_stacksize; int pu_state; struct puffs_node *pu_pn_root; LIST_HEAD(, puffs_node) pu_pnodelst; struct puffs_node *(*pu_cmap)(void *); pu_pathbuild_fn pu_pathbuild; pu_pathtransform_fn pu_pathtransform; pu_pathcmp_fn pu_pathcmp; pu_pathfree_fn pu_pathfree; pu_namemod_fn pu_namemod; void *pu_privdata; }; enum { PUFFS_STATE_MOUNTING, PUFFS_STATE_RUNNING, PUFFS_STATE_UNMOUNTING, PUFFS_STATE_UNMOUNTED }; #define PUFFS_FLAG_KERN(a) ((a) & 0x0000ffff) #define PUFFS_FLAG_LIB(a) ((a) & 0xffff0000) #define PUFFS_FLAG_BUILDPATH 0x80000000 /* node paths in pnode */ #define PUFFS_FLAG_OPDUMP 0x40000000 /* dump all operations */ /* blocking mode argument */ #define PUFFSDEV_BLOCK 0 #define PUFFSDEV_NONBLOCK 1 /* mainloop flags */ #define PUFFSLOOP_NODAEMON 0x01 #define DENT_DOT 0 #define DENT_DOTDOT 1 #define DENT_ADJ(a) ((a)-2) /* nth request means dir's n-2th */ /* * protos */ #define PUFFSOP_PROTOS(fsname) \ int fsname##_fs_mount(struct puffs_usermount *, void **, \ struct statvfs *); \ int fsname##_fs_unmount(struct puffs_cc *, int, pid_t); \ int fsname##_fs_statvfs(struct puffs_cc *, \ struct statvfs *, pid_t); \ int fsname##_fs_sync(struct puffs_cc *, int, \ const struct puffs_cred *cred, pid_t); \ void fsname##_fs_suspend(struct puffs_cc *, int); \ \ int fsname##_node_lookup(struct puffs_cc *, \ void *, void **, enum vtype *, voff_t *, dev_t *, \ const struct puffs_cn *); \ int fsname##_node_create(struct puffs_cc *, \ void *, void **, const struct puffs_cn *, \ const struct vattr *); \ int fsname##_node_mknod(struct puffs_cc *, \ void *, void **, const struct puffs_cn *, \ const struct vattr *); \ int fsname##_node_open(struct puffs_cc *, \ void *, int, const struct puffs_cred *, pid_t); \ int fsname##_node_close(struct puffs_cc *, \ void *, int, const struct puffs_cred *, pid_t); \ int fsname##_node_access(struct puffs_cc *, \ void *, int, const struct puffs_cred *, pid_t); \ int fsname##_node_getattr(struct puffs_cc *, \ void *, struct vattr *, const struct puffs_cred *, pid_t); \ int fsname##_node_setattr(struct puffs_cc *, \ void *, const struct vattr *, const struct puffs_cred *, \ pid_t); \ int fsname##_node_poll(struct puffs_cc *, \ void *, struct puffs_vnreq_poll *); \ int fsname##_node_mmap(struct puffs_cc *, \ void *, int, const struct puffs_cred *, pid_t); \ int fsname##_node_fsync(struct puffs_cc *, \ void *, const struct puffs_cred *, int, off_t, off_t, \ pid_t); \ int fsname##_node_seek(struct puffs_cc *, \ void *, off_t, off_t, const struct puffs_cred *); \ int fsname##_node_remove(struct puffs_cc *, \ void *, void *, const struct puffs_cn *); \ int fsname##_node_link(struct puffs_cc *, \ void *, void *, const struct puffs_cn *); \ int fsname##_node_rename(struct puffs_cc *, \ void *, void *, const struct puffs_cn *, void *, void *, \ const struct puffs_cn *); \ int fsname##_node_mkdir(struct puffs_cc *, \ void *, void **, const struct puffs_cn *, \ const struct vattr *); \ int fsname##_node_rmdir(struct puffs_cc *, \ void *, void *, const struct puffs_cn *); \ int fsname##_node_symlink(struct puffs_cc *, \ void *, void **, const struct puffs_cn *, \ const struct vattr *, const char *); \ int fsname##_node_readdir(struct puffs_cc *, \ void *, struct dirent *, const struct puffs_cred *, \ off_t *, size_t *); \ int fsname##_node_readlink(struct puffs_cc *, \ void *, const struct puffs_cred *, char *, size_t *); \ int fsname##_node_reclaim(struct puffs_cc *, \ void *, pid_t); \ int fsname##_node_inactive(struct puffs_cc *, \ void *, pid_t, int *); \ int fsname##_node_print(struct puffs_cc *, \ void *); \ int fsname##_node_pathconf(struct puffs_cc *, \ void *, int, int *); \ int fsname##_node_advlock(struct puffs_cc *, \ void *, void *, int, struct flock *, int); \ int fsname##_node_getextattr(struct puffs_cc *, \ void *, struct puffs_vnreq_getextattr *); \ int fsname##_node_setextattr(struct puffs_cc *, \ void *, struct puffs_vnreq_setextattr *); \ int fsname##_node_listextattr(struct puffs_cc *, \ void *, struct puffs_vnreq_listextattr *); \ int fsname##_node_read(struct puffs_cc *, void *, \ uint8_t *, off_t, size_t *, const struct puffs_cred *, int);\ int fsname##_node_write(struct puffs_cc *, void *, \ uint8_t *, off_t, size_t *, const struct puffs_cred *, int);\ \ int fsname##_cache_write(struct puffs_usermount *, void *, \ size_t, struct puffs_cacheinfo *); #define PUFFSOP_INIT(ops) \ ops = malloc(sizeof(struct puffs_ops)); \ memset(ops, 0, sizeof(struct puffs_ops)) #define PUFFSOP_SET(ops, fsname, fsornode, opname) \ (ops)->puffs_##fsornode##_##opname = fsname##_##fsornode##_##opname #define PUFFSOP_SETFSNOP(ops, opname) \ (ops)->puffs_fs_##opname = puffs_fsnop_##opname #define PUFFS_DEVEL_LIBVERSION 10 #define puffs_mount(a,b,c,d,e,f,g) \ _puffs_mount(PUFFS_DEVEL_LIBVERSION,a,b,c,d,e,f,g) #define PNPATH(pnode) ((pnode)->pn_po.po_path) #define PNPLEN(pnode) ((pnode)->pn_po.po_len) #define PCNPATH(pcnode) ((pcnode)->pcn_po_full.po_path) #define PCNPLEN(pcnode) ((pcnode)->pcn_po_full.po_len) #define PCNISDOTDOT(pcnode) \ ((pcnode)->pcn_namelen == 2 && strcmp((pcnode)->pcn_name, "..") == 0) __BEGIN_DECLS struct puffs_usermount *_puffs_mount(int, struct puffs_ops *, const char *, int, const char *, void *, uint32_t, size_t); int puffs_start(struct puffs_usermount *, void *, struct statvfs *); int puffs_exit(struct puffs_usermount *, int); int puffs_mainloop(struct puffs_usermount *, int); int puffs_getselectable(struct puffs_usermount *); int puffs_setblockingmode(struct puffs_usermount *, int); int puffs_getstate(struct puffs_usermount *); void puffs_setstacksize(struct puffs_usermount *, size_t); struct puffs_pathobj *puffs_getrootpathobj(struct puffs_usermount *); struct puffs_node *puffs_pn_new(struct puffs_usermount *, void *); void puffs_pn_put(struct puffs_node *); typedef void * (*puffs_nodewalk_fn)(struct puffs_usermount *, struct puffs_node *, void *); void *puffs_pn_nodewalk(struct puffs_usermount *, puffs_nodewalk_fn, void *); void puffs_setvattr(struct vattr *, const struct vattr *); void puffs_vattr_null(struct vattr *); /* * generic/dummy routines applicable for some file systems */ int puffs_fsnop_unmount(struct puffs_cc *, int, pid_t); int puffs_fsnop_statvfs(struct puffs_cc *, struct statvfs *, pid_t); void puffs_zerostatvfs(struct statvfs *); int puffs_fsnop_sync(struct puffs_cc *, int waitfor, const struct puffs_cred *, pid_t); int puffs_genfs_node_reclaim(struct puffs_cc *, void *, pid_t); /* * Subroutine stuff */ int puffs_gendotdent(struct dirent **, ino_t, int, size_t *); int puffs_nextdent(struct dirent **, const char *, ino_t, uint8_t, size_t *); int puffs_vtype2dt(enum vtype); enum vtype puffs_mode2vt(mode_t); void puffs_stat2vattr(struct vattr *va, const struct stat *); mode_t puffs_addvtype2mode(mode_t, enum vtype); /* * credentials & permissions */ /* Credential fetch */ int puffs_cred_getuid(const struct puffs_cred *pcr, uid_t *); int puffs_cred_getgid(const struct puffs_cred *pcr, gid_t *); int puffs_cred_getgroups(const struct puffs_cred *pcr, gid_t *, short *); /* Credential check */ int puffs_cred_isuid(const struct puffs_cred *, uid_t); int puffs_cred_hasgroup(const struct puffs_cred *, gid_t); int puffs_cred_isregular(const struct puffs_cred *); int puffs_cred_iskernel(const struct puffs_cred *); int puffs_cred_isfs(const struct puffs_cred *); int puffs_cred_isjuggernaut(const struct puffs_cred *); /* misc */ int puffs_access(enum vtype, mode_t, uid_t, gid_t, mode_t, const struct puffs_cred *); int puffs_access_chown(uid_t, gid_t, uid_t, gid_t, const struct puffs_cred *); int puffs_access_chmod(uid_t, gid_t, enum vtype, mode_t, const struct puffs_cred *); int puffs_access_times(uid_t, gid_t, mode_t, int, const struct puffs_cred *); /* * Requests */ struct puffs_getreq *puffs_req_makeget(struct puffs_usermount *, size_t, int); int puffs_req_loadget(struct puffs_getreq *); struct puffs_req *puffs_req_get(struct puffs_getreq *); int puffs_req_remainingget(struct puffs_getreq *); void puffs_req_setmaxget(struct puffs_getreq *, int); void puffs_req_destroyget(struct puffs_getreq *); struct puffs_putreq *puffs_req_makeput(struct puffs_usermount *); void puffs_req_put(struct puffs_putreq *,struct puffs_req *); void puffs_req_putcc(struct puffs_putreq *,struct puffs_cc*); int puffs_req_putput(struct puffs_putreq *); void puffs_req_resetput(struct puffs_putreq *); void puffs_req_destroyput(struct puffs_putreq *); int puffs_req_handle(struct puffs_usermount *, struct puffs_getreq *, struct puffs_putreq *, int); /* * Call Context interfaces relevant for user. */ void puffs_cc_yield(struct puffs_cc *); void puffs_cc_continue(struct puffs_cc *); struct puffs_usermount *puffs_cc_getusermount(struct puffs_cc *); struct puffs_cc *puffs_cc_create(struct puffs_usermount *); void puffs_cc_destroy(struct puffs_cc *); /* * Execute or continue a request */ int puffs_dopreq(struct puffs_usermount *, struct puffs_req *, struct puffs_putreq *); int puffs_docc(struct puffs_cc *, struct puffs_putreq *); /* * Flushing / invalidation routines */ int puffs_inval_namecache_dir(struct puffs_usermount *, void *); int puffs_inval_namecache_all(struct puffs_usermount *); int puffs_inval_pagecache_node(struct puffs_usermount *, void *); /* * Path constructicons */ int puffs_stdpath_buildpath(struct puffs_usermount *, const struct puffs_pathobj *, const struct puffs_pathobj *, size_t, struct puffs_pathobj *); int puffs_stdpath_cmppath(struct puffs_usermount *, struct puffs_pathobj *, struct puffs_pathobj *, size_t, int); void puffs_stdpath_freepath(struct puffs_usermount *,struct puffs_pathobj *); void *puffs_path_walkcmp(struct puffs_usermount *, struct puffs_node *, void *); void *puffs_path_prefixadj(struct puffs_usermount *, struct puffs_node *, void *); int puffs_path_pcnbuild(struct puffs_usermount *, struct puffs_cn *, void *); void puffs_set_pathbuild(struct puffs_usermount *, pu_pathbuild_fn); void puffs_set_pathtransform(struct puffs_usermount *, pu_pathtransform_fn); void puffs_set_pathcmp(struct puffs_usermount *, pu_pathcmp_fn); void puffs_set_pathfree(struct puffs_usermount *, pu_pathfree_fn); void puffs_set_namemod(struct puffs_usermount *, pu_namemod_fn); /* * Suspension */ int puffs_fs_suspend(struct puffs_usermount *); __END_DECLS #endif /* _PUFFS_H_ */