include/linux/fscache.h

107 	 * - the page will have been marked with PG_fscache before this is
118  * - all other fields will be set during registration
128  * - a file will only appear in one cache
372  * backing cache.  The auxiliary data on the cookie will be updated first if
394  * cookie.  The auxiliary data on the cookie will be updated first if @aux_data
441  * changed.  This includes the data size.  These attributes will be obtained
524  * it can't be, -ENOBUFS will be returned and nothing more will be done for
527  * Else, if that page is backed by the cache, a read will be initiated directly
528  * to the netfs's page and 0 will be returned by this function.  The
529  * end_io_func() callback will be invoked when the operation terminates on a
557  * @mapping: The netfs inode mapping to which the pages will be attached
569  * reason they can't be, -ENOBUFS will be returned and nothing more will be
572  * Else, if some of the pages are backed by the cache, a read will be initiated
573  * directly to the netfs's page and 0 will be returned by this function.  The
574  * end_io_func() callback will be invoked when the operation terminates on a
614  * If the page is not backed by a file then -ENOBUFS will be returned and
615  * nothing more will be done, and no reservation will be made.
617  * Else, a block will be allocated if one wasn't already, and 0 will be
663  * case it will return -ENOBUFS.
665  * If a cache block was already allocated, a write will be initiated and 0 will
666  * be returned.  The PG_fscache_write page bit is set immediately and will then
757  * page will have been passed to fscache_uncache_page().  If false is returned
778  * This function may sleep.  It will wait for pages that are being written out
779  * and will wait whilst the PG_fscache mark is removed by the cache.
799  * This will not return until all outstanding operations have completed.
801  * If @invalidate is set, then the backing object will be invalidated and
802  * detached, otherwise it will just be detached.
804  * If @aux_data is set, then auxiliary data will be updated from that.
824  * read, write, invalidate, update or acquire operations.  An attempt will be
826  * is set, the auxiliary data attached to the cookie will be updated.