82  * @ni:		ntfs inode whose mft record page to map
84  * This maps the folio in which the mft record of the ntfs inode @ni is
87  * This allocates a new buffer (@ni->mrec), copies the MFT record data from
91  * The folio is pinned (referenced) in @ni->folio to ensure the data remains
94  * Return: A pointer to the allocated and fixed-up mft record (@ni->mrec).
98 static inline struct mft_record *map_mft_record_folio(struct ntfs_inode *ni)  in map_mft_record_folio()  argument
101 	struct ntfs_volume *vol = ni->vol;  in map_mft_record_folio()
107 	WARN_ON(ni->folio);  in map_mft_record_folio()
112 	index = NTFS_MFT_NR_TO_PIDX(vol, ni->mft_no);  in map_mft_record_folio()
113 	ofs = NTFS_MFT_NR_TO_POFS(vol, ni->mft_no);  in map_mft_record_folio()
126 				ni->mft_no);  in map_mft_record_folio()
136 		ni->mrec = kmalloc(vol->mft_record_size, GFP_NOFS);  in map_mft_record_folio()
137 		if (!ni->mrec) {  in map_mft_record_folio()
144 		memcpy(ni->mrec, addr + ofs, vol->mft_record_size);  in map_mft_record_folio()
145 		post_read_mst_fixup((struct ntfs_record *)ni->mrec, vol->mft_record_size);  in map_mft_record_folio()
148 		if (!ntfs_mft_record_check(vol, (struct mft_record *)ni->mrec, ni->mft_no)) {  in map_mft_record_folio()
150 			ni->folio = folio;  in map_mft_record_folio()
151 			ni->folio_ofs = ofs;  in map_mft_record_folio()
152 			return ni->mrec;  in map_mft_record_folio()
156 		kfree(ni->mrec);  in map_mft_record_folio()
157 		ni->mrec = NULL;  in map_mft_record_folio()
162 	ni->folio = NULL;  in map_mft_record_folio()
163 	ni->folio_ofs = 0;  in map_mft_record_folio()
169  * @ni:		ntfs inode whose MFT record to map
175  * already mapped (@ni->folio is set), it returns the cached record
185 struct mft_record *map_mft_record(struct ntfs_inode *ni)  in map_mft_record()  argument
189 	if (!ni)  in map_mft_record()
192 	ntfs_debug("Entering for mft_no 0x%llx.", ni->mft_no);  in map_mft_record()
195 	atomic_inc(&ni->count);  in map_mft_record()
197 	if (ni->folio)  in map_mft_record()
198 		return (struct mft_record *)ni->mrec;  in map_mft_record()
200 	m = map_mft_record_folio(ni);  in map_mft_record()
204 	atomic_dec(&ni->count);  in map_mft_record()
205 	ntfs_error(ni->vol->sb, "Failed with error code %lu.", -PTR_ERR(m));  in map_mft_record()
211  * @ni:		ntfs inode whose MFT record to unmap
223 void unmap_mft_record(struct ntfs_inode *ni)  in unmap_mft_record()  argument
227 	if (!ni)  in unmap_mft_record()
230 	ntfs_debug("Entering for mft_no 0x%llx.", ni->mft_no);  in unmap_mft_record()
232 	folio = ni->folio;  in unmap_mft_record()
233 	if (atomic_dec_return(&ni->count) > 1)  in unmap_mft_record()
255 	struct ntfs_inode *ni = NULL;  in map_extent_mft_record()  local
278 			ni = extent_nis[i];  in map_extent_mft_record()
280 			atomic_inc(&ni->count);  in map_extent_mft_record()
284 	if (likely(ni != NULL)) {  in map_extent_mft_record()
288 		m = map_mft_record(ni);  in map_extent_mft_record()
290 		atomic_dec(&ni->count);  in map_extent_mft_record()
295 				*ntfs_ino = ni;  in map_extent_mft_record()
298 			unmap_mft_record(ni);  in map_extent_mft_record()
312 	ni = ntfs_new_extent_inode(base_ni->vol->sb, mft_no);  in map_extent_mft_record()
313 	if (unlikely(!ni)) {  in map_extent_mft_record()
317 	ni->vol = base_ni->vol;  in map_extent_mft_record()
318 	ni->seq_no = seq_no;  in map_extent_mft_record()
319 	ni->nr_extents = -1;  in map_extent_mft_record()
320 	ni->ext.base_ntfs_ino = base_ni;  in map_extent_mft_record()
322 	m = map_mft_record(ni);  in map_extent_mft_record()
325 		ntfs_clear_extent_inode(ni);  in map_extent_mft_record()
341 			ntfs_clear_extent_inode(ni);  in map_extent_mft_record()
365 	base_ni->ext.extent_ntfs_inos[base_ni->nr_extents++] = ni;  in map_extent_mft_record()
369 	*ntfs_ino = ni;  in map_extent_mft_record()
374 	unmap_mft_record(ni);  in map_extent_mft_record()
381 		ntfs_clear_extent_inode(ni);  in map_extent_mft_record()
387  * @ni:		ntfs inode describing the mapped mft record
391  * This function determines the base ntfs inode (in case @ni is an extent
406 void __mark_mft_record_dirty(struct ntfs_inode *ni)  in __mark_mft_record_dirty()  argument
410 	ntfs_debug("Entering for inode 0x%llx.", ni->mft_no);  in __mark_mft_record_dirty()
411 	WARN_ON(NInoAttr(ni));  in __mark_mft_record_dirty()
413 	if (likely(ni->nr_extents >= 0))  in __mark_mft_record_dirty()
414 		base_ni = ni;  in __mark_mft_record_dirty()
416 		base_ni = ni->ext.base_ntfs_ino;  in __mark_mft_record_dirty()
523  * @ni:		ntfs inode describing the mapped (extent) mft record
528  * ntfs inode @ni to backing store.  If the mft record @m has a counterpart in
531  * We only write the mft record if the ntfs inode @ni is dirty.
537 int write_mft_record_nolock(struct ntfs_inode *ni, struct mft_record *m, int sync)  in write_mft_record_nolock()  argument
539 	struct ntfs_volume *vol = ni->vol;  in write_mft_record_nolock()
540 	struct folio *folio = ni->folio;  in write_mft_record_nolock()
547 	ntfs_debug("Entering for inode 0x%llx.", ni->mft_no);  in write_mft_record_nolock()
549 	WARN_ON(NInoAttr(ni));  in write_mft_record_nolock()
558 	if (!NInoTestClearDirty(ni))  in write_mft_record_nolock()
562 	fixup_m = (struct mft_record *)(kaddr + ni->folio_ofs);  in write_mft_record_nolock()
572 	folio_size = vol->mft_record_size / ni->mft_lcn_count;  in write_mft_record_nolock()
573 	while (i < ni->mft_lcn_count) {  in write_mft_record_nolock()
576 		clu_off = (unsigned int)((s64)ni->mft_no * vol->mft_record_size + offset) &  in write_mft_record_nolock()
581 			NTFS_B_TO_SECTOR(vol, NTFS_CLU_TO_B(vol, ni->mft_lcn[i]) +  in write_mft_record_nolock()
585 				   ni->folio_ofs + offset)) {  in write_mft_record_nolock()
591 		if (!sync && ni->mft_no < vol->mftmirr_size)  in write_mft_record_nolock()
592 			ntfs_sync_mft_mirror(vol, ni->mft_no, fixup_m);  in write_mft_record_nolock()
603 	if (sync && ni->mft_no < vol->mftmirr_size)  in write_mft_record_nolock()
604 		ntfs_sync_mft_mirror(vol, ni->mft_no, fixup_m);  in write_mft_record_nolock()
610 			ni->mft_no);  in write_mft_record_nolock()
628 		mark_mft_record_dirty(ni);  in write_mft_record_nolock()
741 	struct ntfs_inode *ni, *eni, **extent_nis;  in ntfs_may_write_mft_record()  local
780 		ni = NTFS_I(vi);  in ntfs_may_write_mft_record()
782 		atomic_inc(&ni->count);  in ntfs_may_write_mft_record()
784 		if (NInoDirty(ni)) {  in ntfs_may_write_mft_record()
787 			atomic_dec(&ni->count);  in ntfs_may_write_mft_record()
793 		if (unlikely(!mutex_trylock(&ni->mrec_lock))) {  in ntfs_may_write_mft_record()
795 			atomic_dec(&ni->count);  in ntfs_may_write_mft_record()
805 		*locked_ni = ni;  in ntfs_may_write_mft_record()
848 	ni = NTFS_I(vi);  in ntfs_may_write_mft_record()
849 	mutex_lock(&ni->extent_lock);  in ntfs_may_write_mft_record()
850 	if (ni->nr_extents <= 0) {  in ntfs_may_write_mft_record()
855 		mutex_unlock(&ni->extent_lock);  in ntfs_may_write_mft_record()
862 	extent_nis = ni->ext.extent_ntfs_inos;  in ntfs_may_write_mft_record()
863 	for (eni = NULL, i = 0; i < ni->nr_extents; ++i) {  in ntfs_may_write_mft_record()
878 		mutex_unlock(&ni->extent_lock);  in ntfs_may_write_mft_record()
888 	mutex_unlock(&ni->extent_lock);  in ntfs_may_write_mft_record()
1085 static int ntfs_mft_attr_extend(struct ntfs_inode *ni)  in ntfs_mft_attr_extend()  argument
1090 	if (NInoAttr(ni))  in ntfs_mft_attr_extend()
1091 		base_ni = ni->ext.base_ntfs_ino;  in ntfs_mft_attr_extend()
1093 		base_ni = ni;  in ntfs_mft_attr_extend()
1106 	ret = ntfs_attr_update_mapping_pairs(ni, 0);  in ntfs_mft_attr_extend()
2004  * @ni:		[OUT] on success, set to the allocated ntfs inode
2092 			  struct ntfs_inode **ni, struct ntfs_inode *base_ni,  in ntfs_mft_record_alloc()  argument
2109 	if (base_ni && *ni)  in ntfs_mft_record_alloc()
2453 					      ni);  in ntfs_mft_record_alloc()
2489 		(*ni)->seq_no = le16_to_cpu(m->sequence_number);  in ntfs_mft_record_alloc()
2501 		(*ni)->mrec = kmalloc(vol->mft_record_size, GFP_NOFS);  in ntfs_mft_record_alloc()
2502 		if (!(*ni)->mrec) {  in ntfs_mft_record_alloc()
2510 		memcpy((*ni)->mrec, m, vol->mft_record_size);  in ntfs_mft_record_alloc()
2511 		post_read_mst_fixup((struct ntfs_record *)(*ni)->mrec, vol->mft_record_size);  in ntfs_mft_record_alloc()
2514 		(*ni)->folio = folio;  in ntfs_mft_record_alloc()
2515 		(*ni)->folio_ofs = ofs;  in ntfs_mft_record_alloc()
2516 		atomic_inc(&(*ni)->count);  in ntfs_mft_record_alloc()
2530 	(*ni)->mft_no = bit;  in ntfs_mft_record_alloc()
2532 		*ni_mrec = (*ni)->mrec;  in ntfs_mft_record_alloc()
2570  * @ni:		open ntfs inode of the mft record to free
2572  * Free the mft record of the open inode @ni on the mounted ntfs volume @vol.
2574  * cannot use the pointer @ni any more after this function returns success.
2578 int ntfs_mft_record_free(struct ntfs_volume *vol, struct ntfs_inode *ni)  in ntfs_mft_record_free()  argument
2588 	if (!vol || !ni)  in ntfs_mft_record_free()
2591 	ntfs_debug("Entering for inode 0x%llx.\n", (long long)ni->mft_no);  in ntfs_mft_record_free()
2593 	ni_mrec = map_mft_record(ni);  in ntfs_mft_record_free()
2598 	mft_no = ni->mft_no;  in ntfs_mft_record_free()
2613 	err = ntfs_get_block_mft_record(NTFS_I(vol->mft_ino), ni);  in ntfs_mft_record_free()
2616 		unmap_mft_record(ni);  in ntfs_mft_record_free()
2625 	NInoSetDirty(ni);  in ntfs_mft_record_free()
2626 	err = write_mft_record(ni, ni_mrec, 0);  in ntfs_mft_record_free()
2630 	if (likely(ni->nr_extents >= 0))  in ntfs_mft_record_free()
2631 		base_ni = ni;  in ntfs_mft_record_free()
2633 		base_ni = ni->ext.base_ntfs_ino;  in ntfs_mft_record_free()
2646 	unmap_mft_record(ni);  in ntfs_mft_record_free()
2665 	NInoSetDirty(ni);  in ntfs_mft_record_free()
2666 	write_mft_record(ni, ni_mrec, 0);  in ntfs_mft_record_free()
2667 	unmap_mft_record(ni);  in ntfs_mft_record_free()
2671 static s64 lcn_from_index(struct ntfs_volume *vol, struct ntfs_inode *ni,  in lcn_from_index()  argument
2679 	down_read(&ni->runlist.lock);  in lcn_from_index()
2680 	lcn = ntfs_attr_vcn_to_lcn_nolock(ni, vcn, false);  in lcn_from_index()
2681 	up_read(&ni->runlist.lock);  in lcn_from_index()
2702 	struct ntfs_inode *ni = NTFS_I(vi);  in ntfs_write_mft_block()  local
2703 	struct ntfs_volume *vol = ni->vol;  in ntfs_write_mft_block()
2716 	s64 end_vcn = ntfs_bytes_to_cluster(vol, ni->allocated_size);  in ntfs_write_mft_block()
2722 			ni->mft_no, ni->type, folio->index);  in ntfs_write_mft_block()
2734 	lcn = lcn_from_index(vol, ni, folio->index);  in ntfs_write_mft_block()
2792 				down_write(&ni->runlist.lock);  in ntfs_write_mft_block()
2793 				rl = ntfs_attr_vcn_to_rl(ni, vcn_off, &lcn);  in ntfs_write_mft_block()
2794 				up_write(&ni->runlist.lock);  in ntfs_write_mft_block()