fs/nfs/nfs_export.c

4  * The contents of this file are subject to the terms of the
108  * macro for static dtrace probes to trace server namespace ref count mods.
189  * Allocate and copy a secinfo data from "from" to "to".
191  * This routine is used by srv_secinfo_add() to add a new flavor to an
193  * allowable rootname access only applies to the explicit exported node,
196  * "to" should have already been allocated and zeroed before calling
202 srv_secinfo_copy(struct secinfo *from, struct secinfo *to)
204 	to->s_secinfo.sc_nfsnum = from->s_secinfo.sc_nfsnum;
205 	to->s_secinfo.sc_rpcnum = from->s_secinfo.sc_rpcnum;
208 		to->s_secinfo.sc_service = from->s_secinfo.sc_service;
209 		bcopy(from->s_secinfo.sc_name, to->s_secinfo.sc_name,
211 		bcopy(from->s_secinfo.sc_gss_mech, to->s_secinfo.sc_gss_mech,
215 		to->s_secinfo.sc_gss_mech_type =
217 		to->s_secinfo.sc_gss_mech_type->length =
219 		to->s_secinfo.sc_gss_mech_type->elements =
223 		    to->s_secinfo.sc_gss_mech_type->elements,
227 	to->s_refcnt = from->s_refcnt;
228 	to->s_window = from->s_window;
229 	/* no need to copy the mode bits - s_flags */
234  * flavor list is used to propagate flavor ref counts  to an
277  * Add the new security flavors from newdata to the current list, pcursec.
320 	/* move current secinfo list data to the new list */
390 		 * counts are decremented and propagated to ancestors.
424 		return; /* no change; no flavors to remove */
435 	/* walk thru the given secinfo list to remove the flavors */
450 	 * within the list have either been moved to msec or freed
462  * 2) transfer flavor refs of descendants to new/reshared exportdata
469  * If there is more than 1 export reference to an old flavor (i.e. some
471  * needs to be transferred to the new exportdata struct.  A flavor in
500 	 * refs to the new seclist (curdata.ex_secinfo).
516 				 * add old reference to the current
527 				 * to account for the initial reference.
546 		return; /* no more transfer to do */
554 	/* move current secinfo list data to the new list */
605  * if there is more than 1 export reference to an old flavor (i.e. some of
606  * its children shared with this flavor), this flavor information needs to
607  * be transferred to the new shared node.
625 	 * transfer the information to the curdata.
635 		return; /* no transfer to do */
676  * Note: We could add new pointer either to treenode or
677  * to exp_visible, which will point there directly.
728 	 * Move to parent node and propagate sec flavor
729 	 * to exportinfo and to visible structures.
805 	 * is all zeroes. It is initially set to the root filesystem.
848  * Finalization routine for export routines. Called to cleanup previously
884  *  This routine is used by rpc to map rpc security number
885  *  to nfs specific security flavor number.
891  *  we cast them to void.
957 	 * table, assign the nfsflavor to NFS_FLAVOR_NOMAP. In V4, we may
965 	 *	rpcsec_gss module calls this routine to do the mapping,
968 	 *	What we need is to let the nfs layer rejects the request.
975 	 * XXX NFS_FLAVOR_NOMAP is defined in Solaris to work around
1056 		 * if fname resolves to / we get EINVAL error
1079 	 * VOP_ACCESS() to trigger the mount of the
1248 	 * Get the path to the logging buffer and the tag
1289 	 * All of these nested structures need to be converted to
1413 	 * Check the index flag. Do this here to avoid holding the
1460 	 * point to this entry and turn off the public bit so that
1483 	 * need to be created to provide a path for
1515 			 * flavor(s) of the new share were propagated to the
1518 			 * pseudo exprot root to the new (real) export root.
1524 			 * First transfer implicit flavor refs to new export.
1534 	 * transfer it to the new export.
1546 		 * Log share operation to this buffer only.
1634 	 * If there's a visible list, then need to leave
1635 	 * a pseudo export here to retain the visible list
1636 	 * for paths to exports below.
1655 	 * Need to call into the NFSv4 server and release all data
1670 	 * the public filehandle to the root.
1715 		 * if fname resolves to / we get EINVAL error
1737 	 * VOP_ACCESS() to trigger the mount of the
1812 			 * If we need to do NFS logging, the filehandle
1813 			 * must be downsized to 32 bytes.
1905 		 * it's time to stop (with failure).
1986  * the status octet, and two padded octets to make them XDR
1997  *   flavors (1 means yes, 0 means no) that require the client to
1998  *   perform another 0x81 LOOKUP to get them,
2005  *   and it tells server where to start within the secinfo array.
2027 	 * WebNFS clients need to know the unique set of explicitly
2029 	 * "TRUE" is passed to build_seclist_nodups(), only explicitly
2049 	 * are more security flavors the client needs to get.
2100  *                                               up to 64
2110  * to perform another 0x81 LOOKUP to get them.
2125 	 * WebNFS clients need to know the unique set of explicitly
2127 	 * "TRUE" is passed to build_seclist_nodups(), only explicitly
2149 	 * are more security flavors the client needs to get.
2177 	 * vop_fid_pseudo() is used to set up NFSv4 namespace, so
2178 	 * use vop_fid_pseudo() here to get the fid instead of VOP_FID.
2202 	 * Use the rnode volatile_id value to add volatility to the fh.
2208 	 * case use the vnode volatile_id value (which is set to the
2228  * Uses the file id (fh_len + fh_data) in the fhandle to get the vnode.
2279  * Uses the file id (fh_len + fh_data) in the fhandle to get the vnode.
2306  * Uses the file id (fh_len + fh_data) in the file handle to get the vnode.
2348  * Uses the file id (fh_len + fh_data) in the file handle to get the vnode.
2382  * Uses the file id (fh_len + fh_data) in the file handle to get the vnode.
2644  * Test for volatile fh's - add file handle to list and set its volatile id
2645  * to time it was renamed. If EX_VOLFH is also on and the fs is reshared,
2649  * needs to tie a rename list to the export struct and (more
2650  * important), protect access to the exi rename list using a write lock.
2705 	/* no need to hold mutex lock - this one is called from exportfree */
2714  * Add a file handle to the volatile on rename list.