456 * +===+ (VROOT) +---+ +---+
457 *
458 *
459 * Bi-directional interconnect:
460 * treenode_t::tree_exi --------- exportinfo_t::exi_tree
461 * One-way direction connection:
462 * treenode_t::tree_vis .........> exp_visible_t
463 */
464 /* Access to treenode_t is under protection of exported_lock RW_LOCK */
465 typedef struct treenode {
466 /* support for generic n-ary trees */
467 struct treenode *tree_parent;
468 struct treenode *tree_child_first;
469 struct treenode *tree_sibling; /* next sibling */
470 /* private, nfs specific part */
471 struct exportinfo *tree_exi;
472 struct exp_visible *tree_vis;
473 } treenode_t;
474
475 /*
476 * TREE_ROOT checks if the node corresponds to a filesystem root or
477 * the zone's root directory.
478 * TREE_EXPORTED checks if the node is explicitly shared
479 */
480
481 #define TREE_ROOT(t) \
482 ((t)->tree_exi != NULL && \
483 (((t)->tree_exi->exi_vp->v_flag & VROOT) || \
484 VN_CMP((t)->tree_exi->exi_zone->zone_rootvp, (t)->tree_exi->exi_vp)))
485
486 #define TREE_EXPORTED(t) \
487 ((t)->tree_exi && !PSEUDO((t)->tree_exi))
488
489 #define EXPTABLESIZE 256
490
491 struct exp_hash {
492 struct exportinfo *prev; /* ptr to the previous exportinfo */
493 struct exportinfo *next; /* ptr to the next exportinfo */
494 struct exportinfo **bckt; /* backpointer to the hash bucket */
495 };
496
497 /*
498 * A node associated with an export entry on the
499 * list of exported filesystems.
500 *
501 * exi_count+exi_lock protects an individual exportinfo from being freed
502 * when in use.
503 *
504 * You must have the writer lock on exported_lock to add/delete an exportinfo
506 *
507 * exi_volatile_dev maps to VSW_VOLATILEDEV. It means that the
508 * underlying fs devno can change on each mount. When set, the server
509 * should not use va_fsid for a GETATTR(FATTR4_FSID) reply. It must
510 * use exi_fsid because it is guaranteed to be persistent. This isn't
511 * in any way related to NFS4 volatile filehandles.
512 *
513 * The exi_cache_lock protects the exi_cache AVL trees.
514 */
515 struct exportinfo {
516 struct exportdata exi_export;
517 fsid_t exi_fsid;
518 struct fid exi_fid;
519 struct exp_hash fid_hash;
520 struct exp_hash path_hash;
521 struct treenode *exi_tree;
522 fhandle_t exi_fh;
523 krwlock_t exi_cache_lock;
524 kmutex_t exi_lock;
525 uint_t exi_count;
526 vnode_t *exi_vp;
527 vnode_t *exi_dvp;
528 avl_tree_t *exi_cache[AUTH_TABLESIZE];
529 struct log_buffer *exi_logbuffer;
530 struct exp_visible *exi_visible;
531 struct charset_cache *exi_charset;
532 unsigned exi_volatile_dev:1;
533 unsigned exi_moved:1;
534 int exi_id;
535 avl_node_t exi_id_link;
536 /*
537 * Soft-reference/backpointer to the zone. The ZSD callbacks we have
538 * invoke cleanup code that crosses into OTHER cleanup functions that
539 * may assume same-zone context and attempt to find their own ZSD,
540 * using "curzone" when in fact "curzone" is global when called from
541 * NFS's ZSD cleanup (see lm_unexport->nlm_unexport for an example).
542 *
543 * During ZSD shutdown or destroy callbacks, the zone structure
544 * does not have its mutex held, and it has just-enough references
545 * to not free from underneath us. This field is not a proper
546 * referenced-held zone pointer, and only ZSD callbacks should use
547 * it.
548 */
549 struct zone *exi_zone;
550 #ifdef VOLATILE_FH_TEST
551 uint32_t exi_volatile_id;
552 struct ex_vol_rename *exi_vol_rename;
553 kmutex_t exi_vol_rename_lock;
554 #endif /* VOLATILE_FH_TEST -- keep last! */
555 };
556 #define exi_zoneid exi_zone->zone_id
557
558 typedef struct exportinfo exportinfo_t;
559 typedef struct exportdata exportdata_t;
560 typedef struct secinfo secinfo_t;
561
562 /*
563 * exp_visible is a visible list per filesystem. It is for filesystems
564 * that may need a limited view of its contents. A pseudo export and
565 * a real export at the mount point (VROOT) which has a subtree shared
566 * has a visible list.
567 *
568 * The exi_visible field is NULL for normal, non-pseudo filesystems
569 * which do not have any subtree exported. If the field is non-null,
570 * it points to a list of visible entries, identified by vis_fid and/or
571 * vis_ino. The presence of a "visible" list means that if this export
572 * can only have a limited view, it can only view the entries in the
573 * exp_visible list. The directories in the fid list comprise paths that
574 * lead to exported directories.
575 *
576 * The vis_count field records the number of paths in this filesystem
658 extern char *build_symlink(vnode_t *, cred_t *, size_t *);
659
660 extern fhandle_t nullfh2; /* for comparing V2 filehandles */
661
662 typedef struct nfs_export {
663 /* Root of nfs pseudo namespace */
664 treenode_t *ns_root;
665
666 nfs_globals_t *ne_globals; /* "up" pointer */
667
668 struct exportinfo *exptable_path_hash[PKP_HASH_SIZE];
669 struct exportinfo *exptable[EXPTABLESIZE];
670
671 /*
672 * Read/Write lock that protects the exportinfo list. This lock
673 * must be held when searching or modifiying the exportinfo list.
674 */
675 krwlock_t exported_lock;
676
677 /* "public" and default (root) location for public filehandle */
678 struct exportinfo *exi_public, *exi_root;
679 /* For checking default public file handle */
680 fid_t exi_rootfid;
681 /* For comparing V2 filehandles */
682 fhandle_t nullfh2;
683
684 /* The change attribute value of the root of nfs pseudo namespace */
685 timespec_t ns_root_change;
686 } nfs_export_t;
687
688 /*
689 * Functions that handle the NFSv4 server namespace
690 */
691 extern exportinfo_t *vis2exi(treenode_t *);
692 extern int treeclimb_export(struct exportinfo *);
693 extern void treeclimb_unexport(nfs_export_t *, struct exportinfo *);
694 extern int nfs_visible(struct exportinfo *, vnode_t *, int *);
695 extern int nfs_visible_inode(struct exportinfo *, ino64_t,
696 struct exp_visible **);
697 extern int has_visible(struct exportinfo *, vnode_t *);
698 extern void free_visible(struct exp_visible *);
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456 * +===+ (VROOT) +---+ +---+
457 *
458 *
459 * Bi-directional interconnect:
460 * treenode_t::tree_exi --------- exportinfo_t::exi_tree
461 * One-way direction connection:
462 * treenode_t::tree_vis .........> exp_visible_t
463 */
464 /* Access to treenode_t is under protection of exported_lock RW_LOCK */
465 typedef struct treenode {
466 /* support for generic n-ary trees */
467 struct treenode *tree_parent;
468 struct treenode *tree_child_first;
469 struct treenode *tree_sibling; /* next sibling */
470 /* private, nfs specific part */
471 struct exportinfo *tree_exi;
472 struct exp_visible *tree_vis;
473 } treenode_t;
474
475 /*
476 * Now that we have links to chase, we can get the zone rootvp just from
477 * an export. No current-zone-context needed.
478 */
479 #define EXI_TO_ZONEROOTVP(exi) ((exi)->exi_ne->exi_root->exi_vp)
480
481 /*
482 * TREE_ROOT checks if the node corresponds to a filesystem root or
483 * the zone's root directory.
484 * TREE_EXPORTED checks if the node is explicitly shared
485 */
486
487 #define TREE_ROOT(t) \
488 ((t)->tree_exi != NULL && \
489 (((t)->tree_exi->exi_vp->v_flag & VROOT) || \
490 VN_CMP(EXI_TO_ZONEROOTVP((t)->tree_exi), (t)->tree_exi->exi_vp)))
491
492 #define TREE_EXPORTED(t) \
493 ((t)->tree_exi && !PSEUDO((t)->tree_exi))
494
495 #define EXPTABLESIZE 256
496
497 struct exp_hash {
498 struct exportinfo *prev; /* ptr to the previous exportinfo */
499 struct exportinfo *next; /* ptr to the next exportinfo */
500 struct exportinfo **bckt; /* backpointer to the hash bucket */
501 };
502
503 /*
504 * A node associated with an export entry on the
505 * list of exported filesystems.
506 *
507 * exi_count+exi_lock protects an individual exportinfo from being freed
508 * when in use.
509 *
510 * You must have the writer lock on exported_lock to add/delete an exportinfo
512 *
513 * exi_volatile_dev maps to VSW_VOLATILEDEV. It means that the
514 * underlying fs devno can change on each mount. When set, the server
515 * should not use va_fsid for a GETATTR(FATTR4_FSID) reply. It must
516 * use exi_fsid because it is guaranteed to be persistent. This isn't
517 * in any way related to NFS4 volatile filehandles.
518 *
519 * The exi_cache_lock protects the exi_cache AVL trees.
520 */
521 struct exportinfo {
522 struct exportdata exi_export;
523 fsid_t exi_fsid;
524 struct fid exi_fid;
525 struct exp_hash fid_hash;
526 struct exp_hash path_hash;
527 struct treenode *exi_tree;
528 fhandle_t exi_fh;
529 krwlock_t exi_cache_lock;
530 kmutex_t exi_lock;
531 uint_t exi_count;
532 zoneid_t exi_zoneid;
533 vnode_t *exi_vp;
534 vnode_t *exi_dvp;
535 avl_tree_t *exi_cache[AUTH_TABLESIZE];
536 struct log_buffer *exi_logbuffer;
537 struct exp_visible *exi_visible;
538 struct charset_cache *exi_charset;
539 unsigned exi_volatile_dev:1;
540 unsigned exi_moved:1;
541 int exi_id;
542 avl_node_t exi_id_link;
543 /*
544 * Soft-reference/backpointer to zone's nfs_export_t.
545 * This allows us access to the zone's rootvp (stored in
546 * exi_ne->exi_root->exi_vp) even if the current thread isn't in
547 * same-zone context.
548 */
549 struct nfs_export *exi_ne;
550 #ifdef VOLATILE_FH_TEST
551 uint32_t exi_volatile_id;
552 struct ex_vol_rename *exi_vol_rename;
553 kmutex_t exi_vol_rename_lock;
554 #endif /* VOLATILE_FH_TEST -- keep last! */
555 };
556
557 typedef struct exportinfo exportinfo_t;
558 typedef struct exportdata exportdata_t;
559 typedef struct secinfo secinfo_t;
560
561 /*
562 * exp_visible is a visible list per filesystem. It is for filesystems
563 * that may need a limited view of its contents. A pseudo export and
564 * a real export at the mount point (VROOT) which has a subtree shared
565 * has a visible list.
566 *
567 * The exi_visible field is NULL for normal, non-pseudo filesystems
568 * which do not have any subtree exported. If the field is non-null,
569 * it points to a list of visible entries, identified by vis_fid and/or
570 * vis_ino. The presence of a "visible" list means that if this export
571 * can only have a limited view, it can only view the entries in the
572 * exp_visible list. The directories in the fid list comprise paths that
573 * lead to exported directories.
574 *
575 * The vis_count field records the number of paths in this filesystem
657 extern char *build_symlink(vnode_t *, cred_t *, size_t *);
658
659 extern fhandle_t nullfh2; /* for comparing V2 filehandles */
660
661 typedef struct nfs_export {
662 /* Root of nfs pseudo namespace */
663 treenode_t *ns_root;
664
665 nfs_globals_t *ne_globals; /* "up" pointer */
666
667 struct exportinfo *exptable_path_hash[PKP_HASH_SIZE];
668 struct exportinfo *exptable[EXPTABLESIZE];
669
670 /*
671 * Read/Write lock that protects the exportinfo list. This lock
672 * must be held when searching or modifiying the exportinfo list.
673 */
674 krwlock_t exported_lock;
675
676 /* "public" and default (root) location for public filehandle */
677 struct exportinfo *exi_public;
678 struct exportinfo *exi_root;
679 /* For checking default public file handle */
680 fid_t exi_rootfid;
681 /* For comparing V2 filehandles */
682 fhandle_t nullfh2;
683
684 /* The change attribute value of the root of nfs pseudo namespace */
685 timespec_t ns_root_change;
686 } nfs_export_t;
687
688 /*
689 * Functions that handle the NFSv4 server namespace
690 */
691 extern exportinfo_t *vis2exi(treenode_t *);
692 extern int treeclimb_export(struct exportinfo *);
693 extern void treeclimb_unexport(nfs_export_t *, struct exportinfo *);
694 extern int nfs_visible(struct exportinfo *, vnode_t *, int *);
695 extern int nfs_visible_inode(struct exportinfo *, ino64_t,
696 struct exp_visible **);
697 extern int has_visible(struct exportinfo *, vnode_t *);
698 extern void free_visible(struct exp_visible *);
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