bsd/hfs/hfs_cnode.c

165  * remain for cnodes marked in such a fashion is to teardown their fork references and
214 		 * Check whether we are tearing down a cnode with only one remaining fork.
287 	 * we want to ensure that the resource fork continues to be available
288 	 * if the caller has the data fork open.  However, this is not symmetric;
289 	 * someone who has the resource fork open need not be able to access the data
290 	 * fork once the data fork has gone inactive.
292 	 * If we're the last fork, then we have cleaning up to do.
294 	 * A) last fork, and vp == c_vp
295 	 *	Truncate away own fork data. If rsrc fork is not in core, truncate it too.
297 	 * B) last fork, and vp == c_rsrc_vp
298 	 *	Truncate ourselves, assume data fork has been cleaned due to C).
300 	 * If we're not the last fork, then things are a little different:
302 	 * C) not the last fork, vp == c_vp
304 	 *	it cannot be further opened.  Further access to the rsrc fork may
307 	 * D) not the last fork, vp == c_rsrc_vp
326 		/* Truncate away our own fork data. (Case A, B, C above) */
368 		 * Truncate away the resource fork, if we represent the data fork and
369 		 * it is the last fork.  That means, by definition, the rsrc fork is not in
371 		 * data in the resource fork, we call cat_lookup directly, then hfs_release_storage
372 		 * to get rid of the resource fork's data.
426 			 * If there were no errors, then we have the catalog's fork information
427 			 * for the resource fork in question.  Go ahead and delete the data in it now.
438 			 * This fileid's resource fork extents have now been fully deleted on-disk
453 	 * If we represent the last fork (or none in the case of a dir),
565      * to do that now, before we lose our fork data.  We also need to
597 	 * Go ahead and flush the keys out if this cnode is the last fork
879 	 * Find file fork for this vnode (if any)
880 	 * Also check if another fork is active
898 	 * On the last fork, remove the cnode from its hash chain.
915 	/* Release the file fork and related data */
925 	 * If there was only one active fork then we can release the cnode.
1216 		 * Allocate and initialize a file fork...
1230 				panic("hfs_getnewvnode: orphaned rsrc fork");
1239 				panic("hfs_getnewvnode: orphaned data fork");
1251 		 * interested in (i.e. we want the resource fork
1252 		 * but the cnode already has the data fork)
1357 	 * Tag resource fork vnodes as needing an VNOP_INACTIVE
1359 	 * have the chance to process the resource fork.
1421 	 * attempting to reclaim a cnode with only one live fork.  Because the vnode
1475 		struct cat_fork fork;
1488 		 * in memory to store the on-disk fork structures.
1498 		lookup = cat_lookup (hfsmp, &cndesc, 0, NULL, &attr, &fork, NULL);