/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright 2016 Nexenta Systems, Inc. All rights reserved. * Copyright 2016 Jason King. * Copyright 2018 Nexenta Systems, Inc. All rights reserved. */ /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ /* All Rights Reserved */ #ifndef _NFS_EXPORT_H #define _NFS_EXPORT_H #include <nfs/nfs_sec.h> #include <nfs/auth.h> #include <sys/vnode.h> #include <nfs/nfs4.h> #include <sys/kiconv.h> #include <sys/avl.h> #include <sys/zone.h> #ifdef _KERNEL #include <sys/pkp_hash.h> /* for PKP_HASH_SIZE */ #endif /* _KERNEL */ #ifdef __cplusplus extern "C" { #endif /* * nfs pseudo flavor number is owned by IANA. Need to make sure the * Solaris specific NFS_FLAVOR_NOMAP number will not overlap with any * new IANA defined pseudo flavor numbers. The chance for the overlap * is very small since the growth of new flavor numbers is expected * to be limited. */ #define NFS_FLAVOR_NOMAP 999999 /* no nfs flavor mapping */ /* * As duplicate flavors can be passed into exportfs in the arguments, we * allocate a cleaned up array with non duplicate flavors on the stack. * So we need to know how much to allocate. */ #define MAX_FLAVORS 6 /* none, sys, dh, krb5, krb5i krb5p */ /* * Note: exported_lock is currently used to ensure the integrity of * the secinfo fields. */ struct secinfo { seconfig_t s_secinfo; /* /etc/nfssec.conf entry */ unsigned int s_flags; /* flags (see below) */ int32_t s_refcnt; /* reference count for tracking */ /* how many children (self included) */ /* use this flavor. */ int s_window; /* window */ uint_t s_rootid; /* UID to use for authorized roots */ int s_rootcnt; /* count of root names */ caddr_t *s_rootnames; /* array of root names */ /* they are strings for AUTH_DES and */ /* rpc_gss_principal_t for RPCSEC_GSS */ }; #ifdef _SYSCALL32 struct secinfo32 { seconfig32_t s_secinfo; /* /etc/nfssec.conf entry */ uint32_t s_flags; /* flags (see below) */ int32_t s_refcnt; /* reference count for tracking */ /* how many children (self included) */ /* use this flavor. */ int32_t s_window; /* window */ uint32_t s_rootid; /* UID to use for authorized roots */ int32_t s_rootcnt; /* count of root names */ caddr32_t s_rootnames; /* array of root names */ /* they are strings for AUTH_DES and */ /* rpc_gss_principal_t for RPCSEC_GSS */ }; #endif /* _SYSCALL32 */ /* * security negotiation related */ #define SEC_QUERY 0x01 /* query sec modes */ struct sec_ol { int sec_flags; /* security nego flags */ uint_t sec_index; /* index into sec flavor array */ }; /* * Per-mode flags (secinfo.s_flags) */ #define M_RO 0x01 /* exported ro to all */ #define M_ROL 0x02 /* exported ro to all listed */ #define M_RW 0x04 /* exported rw to all */ #define M_RWL 0x08 /* exported ro to all listed */ #define M_ROOT 0x10 /* root list is defined */ #define M_4SEC_EXPORTED 0x20 /* this is an explicitly shared flavor */ #define M_NONE 0x40 /* none list is defined */ #define M_MAP 0x80 /* uidmap and/or gidmap is defined */ /* invalid secinfo reference count */ #define SEC_REF_INVALID(p) ((p)->s_refcnt < 1) /* last secinfo reference */ #define SEC_REF_LAST(p) ((p)->s_refcnt == 1) /* sec flavor explicitly shared for the exported node */ #define SEC_REF_EXPORTED(p) ((p)->s_flags & M_4SEC_EXPORTED) /* the only reference count left is for referring itself */ #define SEC_REF_SELF(p) (SEC_REF_LAST(p) && SEC_REF_EXPORTED(p)) /* * The export information passed to exportfs() (Version 2) */ #define EX_CURRENT_VERSION 2 /* current version of exportdata struct */ struct exportdata { int ex_version; /* structure version */ char *ex_path; /* exported path */ size_t ex_pathlen; /* path length */ int ex_flags; /* flags */ unsigned int ex_anon; /* uid for unauthenticated requests */ int ex_seccnt; /* count of security modes */ struct secinfo *ex_secinfo; /* security mode info */ char *ex_index; /* index file for public filesystem */ char *ex_log_buffer; /* path to logging buffer file */ size_t ex_log_bufferlen; /* buffer file path len */ char *ex_tag; /* tag used to identify log config */ size_t ex_taglen; /* tag length */ }; #ifdef _SYSCALL32 struct exportdata32 { int32_t ex_version; /* structure version */ caddr32_t ex_path; /* exported path */ int32_t ex_pathlen; /* path length */ int32_t ex_flags; /* flags */ uint32_t ex_anon; /* uid for unauthenticated requests */ int32_t ex_seccnt; /* count of security modes */ caddr32_t ex_secinfo; /* security mode info */ caddr32_t ex_index; /* index file for public filesystem */ caddr32_t ex_log_buffer; /* path to logging buffer file */ int32_t ex_log_bufferlen; /* buffer file path len */ caddr32_t ex_tag; /* tag used to identify log config */ int32_t ex_taglen; /* tag length */ }; #endif /* _SYSCALL32 */ /* * exported vfs flags. */ #define EX_NOSUID 0x01 /* exported with unsetable set[ug]ids */ #define EX_ACLOK 0x02 /* exported with maximal access if acl exists */ #define EX_PUBLIC 0x04 /* exported with public filehandle */ #define EX_NOSUB 0x08 /* no nfs_getfh or MCL below export point */ #define EX_INDEX 0x10 /* exported with index file specified */ #define EX_LOG 0x20 /* logging enabled */ #define EX_LOG_ALLOPS 0x40 /* logging of all RPC operations enabled */ /* by default only operations which affect */ /* transaction logging are enabled */ #define EX_PSEUDO 0x80 /* pseudo filesystem export */ #ifdef VOLATILE_FH_TEST #define EX_VOLFH 0x100 /* XXX nfsv4 fh may expire anytime */ #define EX_VOLRNM 0x200 /* XXX nfsv4 fh expire at rename */ #define EX_VOLMIG 0x400 /* XXX nfsv4 fh expire at migration */ #define EX_NOEXPOPEN 0x800 /* XXX nfsv4 fh no expire with open */ #endif /* VOLATILE_FH_TEST */ #define EX_CHARMAP 0x1000 /* NFS may need a character set conversion */ #define EX_NOACLFAB 0x2000 /* If set, NFSv2 and v3 servers won't */ /* fabricate an aclent_t ACL on file systems */ /* that don't support aclent_t ACLs */ #define EX_NOHIDE 0x4000 /* traversable from exported parent */ #ifdef _KERNEL #ifdef VOLATILE_FH_TEST struct ex_vol_rename { nfs_fh4_fmt_t vrn_fh_fmt; struct ex_vol_rename *vrn_next; }; #endif /* VOLATILE_FH_TEST */ /* * An auth cache client entry. This is the umbrella structure and contains all * related auth_cache entries in the authc_tree AVL tree. */ struct auth_cache_clnt { avl_node_t authc_link; struct netbuf authc_addr; /* address of the client */ krwlock_t authc_lock; /* protects authc_tree */ avl_tree_t authc_tree; /* auth_cache entries */ }; /* * An auth cache entry can exist in 6 states. * * A NEW entry was recently allocated and added to the cache. It does not * contain the valid auth state yet. * * A WAITING entry is one which is actively engaging the user land mountd code * to authenticate or re-authenticate it. The auth state might not be valid * yet. The other threads should wait on auth_cv until the retrieving thread * finishes the retrieval and changes the auth cache entry to FRESH, or NEW (in * a case this entry had no valid auth state yet). * * A REFRESHING entry is one which is actively engaging the user land mountd * code to re-authenticate the cache entry. There is currently no other thread * waiting for the results of the refresh. * * A FRESH entry is one which is valid (it is either newly retrieved or has * been refreshed at least once). * * A STALE entry is one which has been detected to be too old. The transition * from FRESH to STALE prevents multiple threads from submitting refresh * requests. * * An INVALID entry is one which was either STALE or REFRESHING and was deleted * out of the encapsulating exi. Since we can't delete it yet, we mark it as * INVALID, which lets the refresh thread know not to work on it and free it * instead. * * Note that the auth state of the entry is valid, even if the entry is STALE. * Just as you can eat stale bread, you can consume a stale cache entry. The * only time the contents change could be during the transition from REFRESHING * or WAITING to FRESH. * * Valid state transitions: * * alloc * | * v * +-----+ * +--->| NEW |------>free * | +-----+ * | | * | v * | +---------+ * +<-| WAITING | * ^ +---------+ * | | * | v * | +<--------------------------+<---------------+ * | | ^ | * | v | | * | +-------+ +-------+ +------------+ +---------+ * +---| FRESH |--->| STALE |--->| REFRESHING |--->| WAITING | * +-------+ +-------+ +------------+ +---------+ * | | | * | v | * v +---------+ | * free<-----| INVALID |<--------+ * +---------+ */ typedef enum auth_state { NFS_AUTH_FRESH, NFS_AUTH_STALE, NFS_AUTH_REFRESHING, NFS_AUTH_INVALID, NFS_AUTH_NEW, NFS_AUTH_WAITING } auth_state_t; /* * An authorization cache entry * * Either the state in auth_state will protect the * contents or auth_lock must be held. */ struct auth_cache { avl_node_t auth_link; struct auth_cache_clnt *auth_clnt; int auth_flavor; cred_t *auth_clnt_cred; uid_t auth_srv_uid; gid_t auth_srv_gid; uint_t auth_srv_ngids; gid_t *auth_srv_gids; int auth_access; time_t auth_time; time_t auth_freshness; auth_state_t auth_state; kmutex_t auth_lock; kcondvar_t auth_cv; }; #define AUTH_TABLESIZE 32 /* * Structure containing log file meta-data. */ struct log_file { unsigned int lf_flags; /* flags (see below) */ int lf_writers; /* outstanding writers */ int lf_refcnt; /* references to this struct */ caddr_t lf_path; /* buffer file location */ vnode_t *lf_vp; /* vnode for the buffer file */ kmutex_t lf_lock; kcondvar_t lf_cv_waiters; }; /* * log_file and log_buffer flags. */ #define L_WAITING 0x01 /* flush of in-core data to stable */ /* storage in progress */ #define L_PRINTED 0x02 /* error message printed to console */ #define L_ERROR 0x04 /* error condition detected */ /* * The logging buffer information. * This structure may be shared by multiple exportinfo structures, * if they share the same buffer file. * This structure contains the basic information about the buffer, such * as it's location in the filesystem. * * 'lb_lock' protects all the fields in this structure except for 'lb_path', * and 'lb_next'. * 'lb_path' is a write-once/read-many field which needs no locking, it is * set before the structure is linked to any exportinfo structure. * 'lb_next' is protected by the log_buffer_list_lock. */ struct log_buffer { unsigned int lb_flags; /* L_ONLIST set? */ int lb_refcnt; /* references to this struct */ unsigned int lb_rec_id; /* used to generate unique id */ caddr_t lb_path; /* buffer file pathname */ struct log_file *lb_logfile; /* points to log_file structure */ kmutex_t lb_lock; struct log_buffer *lb_next; kcondvar_t lb_cv_waiters; caddr_t lb_records; /* linked list of records to write */ int lb_num_recs; /* # of records to write */ ssize_t lb_size_queued; /* number of bytes queued for write */ }; #define LOG_BUFFER_HOLD(lbp) { \ mutex_enter(&(lbp)->lb_lock); \ (lbp)->lb_refcnt++; \ mutex_exit(&(lbp)->lb_lock); \ } #define LOG_BUFFER_RELE(lbp) { \ log_buffer_rele(lbp); \ } /* * Structure for character set conversion mapping based on client address. */ struct charset_cache { struct charset_cache *next; kiconv_t inbound; kiconv_t outbound; struct sockaddr client_addr; }; /* Forward declarations */ struct exportinfo; struct exp_visible; struct svc_req; /* * Treenodes are used to build tree representing every node which is part * of nfs server pseudo namespace. They are connected with both exportinfo * and exp_visible struct. They were introduced to avoid lookup of ".." * in the underlying file system during unshare, which was failing if the * file system was forcibly unmounted or if the directory was removed. * One exp_visible_t can be shared via several treenode_t, i.e. * different tree_vis can point to the same exp_visible_t. * This will happen if some directory is on two different shared paths: * E.g. after share /tmp/a/b1 and share /tmp/a/b2 there will be two treenodes * corresponding to /tmp/a and both will have same value in tree_vis. * * * * NEW DATA STRUCT ORIGINAL DATA STRUCT * * ns_root +---+ +----------+ * | / | |PSEUDO EXP|-->+---+ +---+ +---+ * +---+--------- ----+----------+ | a |-->| k |-->| b | * /\ +---+ +---+ +---+ * / \ . . . * +---+...\......... ..................... . . * *| a | \ +----------+ . . * +---+-----\------- ----|REAL EXP a| . . * / \ +----------+ . . * / +===+... ............................. . * / *| k | +----------+ . * / +===+--- ----|REAL EXP k| . * / +----------+ . * +===+................ ..................................... * *| b | +----------+ * +===+---------------- ----|REAL EXP b|-->+---+ * \ +----------+ | d | * +===+............. ...................+---+ * | d | +----------+ * +===+------------- ----|PSEUDO EXP|-->+---+ +---+ * / +----------+ | e |-->| g | * +---+................. ...................+---+ +---+ * | e | . * +---+ . * \ . * +---+.............. ............................ * *| g | +----------+ * +---+-------------- ----|REAL EXP g| * +----------+ * * * * +===+ +---+ +---+ * | b |..mountpoint | e |..directory/file *| a |..node is shared * +===+ (VROOT) +---+ +---+ * * * Bi-directional interconnect: * treenode_t::tree_exi --------- exportinfo_t::exi_tree * One-way direction connection: * treenode_t::tree_vis .........> exp_visible_t */ /* Access to treenode_t is under protection of exported_lock RW_LOCK */ typedef struct treenode { /* support for generic n-ary trees */ struct treenode *tree_parent; struct treenode *tree_child_first; struct treenode *tree_sibling; /* next sibling */ /* private, nfs specific part */ struct exportinfo *tree_exi; struct exp_visible *tree_vis; } treenode_t; /* * Now that we have links to chase, we can get the zone rootvp just from * an export. No current-zone-context needed. */ #define EXI_TO_ZONEROOTVP(exi) ((exi)->exi_ne->exi_root->exi_vp) /* * TREE_ROOT checks if the node corresponds to a filesystem root or * the zone's root directory. * TREE_EXPORTED checks if the node is explicitly shared */ #define TREE_ROOT(t) \ ((t)->tree_exi != NULL && \ (((t)->tree_exi->exi_vp->v_flag & VROOT) || \ VN_CMP(EXI_TO_ZONEROOTVP((t)->tree_exi), (t)->tree_exi->exi_vp))) #define TREE_EXPORTED(t) \ ((t)->tree_exi && !PSEUDO((t)->tree_exi)) #define EXPTABLESIZE 256 struct exp_hash { struct exportinfo *prev; /* ptr to the previous exportinfo */ struct exportinfo *next; /* ptr to the next exportinfo */ struct exportinfo **bckt; /* backpointer to the hash bucket */ }; /* * A node associated with an export entry on the * list of exported filesystems. * * exi_count+exi_lock protects an individual exportinfo from being freed * when in use. * * You must have the writer lock on exported_lock to add/delete an exportinfo * structure to/from the list. * * exi_volatile_dev maps to VSW_VOLATILEDEV. It means that the * underlying fs devno can change on each mount. When set, the server * should not use va_fsid for a GETATTR(FATTR4_FSID) reply. It must * use exi_fsid because it is guaranteed to be persistent. This isn't * in any way related to NFS4 volatile filehandles. * * The exi_cache_lock protects the exi_cache AVL trees. */ struct exportinfo { struct exportdata exi_export; fsid_t exi_fsid; struct fid exi_fid; struct exp_hash fid_hash; struct exp_hash path_hash; struct treenode *exi_tree; fhandle_t exi_fh; krwlock_t exi_cache_lock; kmutex_t exi_lock; uint_t exi_count; zoneid_t exi_zoneid; vnode_t *exi_vp; vnode_t *exi_dvp; avl_tree_t *exi_cache[AUTH_TABLESIZE]; struct log_buffer *exi_logbuffer; struct exp_visible *exi_visible; struct charset_cache *exi_charset; unsigned exi_volatile_dev:1; unsigned exi_moved:1; int exi_id; avl_node_t exi_id_link; /* * Soft-reference/backpointer to zone's nfs_export_t. * This allows us access to the zone's rootvp (stored in * exi_ne->exi_root->exi_vp) even if the current thread isn't in * same-zone context. */ struct nfs_export *exi_ne; #ifdef VOLATILE_FH_TEST uint32_t exi_volatile_id; struct ex_vol_rename *exi_vol_rename; kmutex_t exi_vol_rename_lock; #endif /* VOLATILE_FH_TEST -- keep last! */ }; typedef struct exportinfo exportinfo_t; typedef struct exportdata exportdata_t; typedef struct secinfo secinfo_t; /* * exp_visible is a visible list per filesystem. It is for filesystems * that may need a limited view of its contents. A pseudo export and * a real export at the mount point (VROOT) which has a subtree shared * has a visible list. * * The exi_visible field is NULL for normal, non-pseudo filesystems * which do not have any subtree exported. If the field is non-null, * it points to a list of visible entries, identified by vis_fid and/or * vis_ino. The presence of a "visible" list means that if this export * can only have a limited view, it can only view the entries in the * exp_visible list. The directories in the fid list comprise paths that * lead to exported directories. * * The vis_count field records the number of paths in this filesystem * that use this directory. The vis_exported field is non-zero if the * entry is an exported directory (leaf node). * * exp_visible itself is not reference counted. Each exp_visible is * referenced twice: * 1) from treenode::tree_vis * 2) linked from exportinfo::exi_visible * The 'owner' of exp_visible is the exportinfo structure. exp_visible should * be always freed only from exportinfo_t, never from treenode::tree_vis. */ struct exp_visible { vnode_t *vis_vp; fid_t vis_fid; u_longlong_t vis_ino; int vis_count; int vis_exported; struct exp_visible *vis_next; struct secinfo *vis_secinfo; int vis_seccnt; timespec_t vis_change; }; typedef struct exp_visible exp_visible_t; #define PSEUDO(exi) ((exi)->exi_export.ex_flags & EX_PSEUDO) #define EXP_LINKED(exi) ((exi)->fid_hash.bckt != NULL) #define EQFSID(fsidp1, fsidp2) \ (((fsidp1)->val[0] == (fsidp2)->val[0]) && \ ((fsidp1)->val[1] == (fsidp2)->val[1])) #define EQFID(fidp1, fidp2) \ ((fidp1)->fid_len == (fidp2)->fid_len && \ bcmp((char *)(fidp1)->fid_data, (char *)(fidp2)->fid_data, \ (uint_t)(fidp1)->fid_len) == 0) #define exportmatch(exi, fsid, fid) \ (EQFSID(&(exi)->exi_fsid, (fsid)) && EQFID(&(exi)->exi_fid, (fid))) /* * Returns true iff exported filesystem is read-only to the given host. * * Note: this macro should be as fast as possible since it's called * on each NFS modification request. */ #define rdonly(ro, vp) ((ro) || vn_is_readonly(vp)) #define rdonly4(req, cs) \ (vn_is_readonly((cs)->vp) || \ (nfsauth4_access((cs)->exi, (cs)->vp, (req), (cs)->basecr, NULL, \ NULL, NULL, NULL) & (NFSAUTH_RO | NFSAUTH_LIMITED))) extern int nfsauth4_access(struct exportinfo *, vnode_t *, struct svc_req *, cred_t *, uid_t *, gid_t *, uint_t *, gid_t **); extern int nfsauth4_secinfo_access(struct exportinfo *, struct svc_req *, int, int, cred_t *); extern int nfsauth_cache_clnt_compar(const void *, const void *); extern int nfs_fhbcmp(char *, char *, int); extern void nfs_exportinit(void); extern void nfs_exportfini(void); extern void nfs_export_zone_init(nfs_globals_t *); extern void nfs_export_zone_fini(nfs_globals_t *); extern void nfs_export_zone_shutdown(nfs_globals_t *); extern int nfs_export_get_rootfh(nfs_globals_t *); extern int chk_clnt_sec(struct exportinfo *, struct svc_req *); extern int makefh(fhandle_t *, struct vnode *, struct exportinfo *); extern int makefh_ol(fhandle_t *, struct exportinfo *, uint_t); extern int makefh3(nfs_fh3 *, struct vnode *, struct exportinfo *); extern int makefh3_ol(nfs_fh3 *, struct exportinfo *, uint_t); extern vnode_t *nfs_fhtovp(fhandle_t *, struct exportinfo *); extern vnode_t *nfs3_fhtovp(nfs_fh3 *, struct exportinfo *); extern struct exportinfo *checkexport(fsid_t *, struct fid *); extern struct exportinfo *checkexport4(fsid_t *, struct fid *, vnode_t *); extern void exi_hold(struct exportinfo *); extern void exi_rele(struct exportinfo *); extern struct exportinfo *nfs_vptoexi(vnode_t *, vnode_t *, cred_t *, int *, int *, bool_t); extern int nfs_check_vpexi(vnode_t *, vnode_t *, cred_t *, struct exportinfo **); extern vnode_t *untraverse(vnode_t *, vnode_t *); extern int vn_is_nfs_reparse(vnode_t *, cred_t *); extern int client_is_downrev(struct svc_req *); extern char *build_symlink(vnode_t *, cred_t *, size_t *); extern fhandle_t nullfh2; /* for comparing V2 filehandles */ typedef struct nfs_export { /* Root of nfs pseudo namespace */ treenode_t *ns_root; nfs_globals_t *ne_globals; /* "up" pointer */ struct exportinfo *exptable_path_hash[PKP_HASH_SIZE]; struct exportinfo *exptable[EXPTABLESIZE]; /* * Read/Write lock that protects the exportinfo list. This lock * must be held when searching or modifiying the exportinfo list. */ krwlock_t exported_lock; /* "public" and default (root) location for public filehandle */ struct exportinfo *exi_public; struct exportinfo *exi_root; /* For checking default public file handle */ fid_t exi_rootfid; /* For comparing V2 filehandles */ fhandle_t nullfh2; /* The change attribute value of the root of nfs pseudo namespace */ timespec_t ns_root_change; } nfs_export_t; /* * Functions that handle the NFSv4 server namespace */ extern exportinfo_t *vis2exi(treenode_t *); extern int treeclimb_export(struct exportinfo *); extern void treeclimb_unexport(nfs_export_t *, struct exportinfo *); extern int nfs_visible(struct exportinfo *, vnode_t *, int *); extern int nfs_visible_inode(struct exportinfo *, ino64_t, struct exp_visible **); extern int has_visible(struct exportinfo *, vnode_t *); extern void free_visible(struct exp_visible *); extern int nfs_exported(struct exportinfo *, vnode_t *); extern struct exportinfo *pseudo_exportfs(nfs_export_t *, vnode_t *, fid_t *, struct exp_visible *, struct exportdata *); extern int vop_fid_pseudo(vnode_t *, fid_t *); extern int nfs4_vget_pseudo(struct exportinfo *, vnode_t **, fid_t *); extern bool_t nfs_visible_change(struct exportinfo *, vnode_t *, timespec_t *); extern void tree_update_change(nfs_export_t *, treenode_t *, timespec_t *); extern void rfs4_clean_state_exi(nfs_export_t *, struct exportinfo *); /* * Functions that handle the NFSv4 server namespace security flavors * information. */ extern void srv_secinfo_exp2pseu(struct exportdata *, struct exportdata *); extern void srv_secinfo_list_free(struct secinfo *, int); extern nfs_export_t *nfs_get_export(); extern void export_link(nfs_export_t *, struct exportinfo *); extern void export_unlink(nfs_export_t *, struct exportinfo *); /* * exi_id support */ extern kmutex_t nfs_exi_id_lock; extern avl_tree_t exi_id_tree; extern int exi_id_get_next(void); /* * Two macros for identifying public filehandles. * A v2 public filehandle is 32 zero bytes. * A v3 public filehandle is zero length. */ #define PUBLIC_FH2(fh) \ ((fh)->fh_fsid.val[1] == 0 && \ bcmp((fh), &nullfh2, sizeof (fhandle_t)) == 0) #define PUBLIC_FH3(fh) \ ((fh)->fh3_length == 0) extern int makefh4(nfs_fh4 *, struct vnode *, struct exportinfo *); extern vnode_t *nfs4_fhtovp(nfs_fh4 *, struct exportinfo *, nfsstat4 *); #endif /* _KERNEL */ #ifdef __cplusplus } #endif #endif /* _NFS_EXPORT_H */
