28  * @ni:		ntfs inode whose mft record page to map
30  * This maps the page in which the mft record of the ntfs inode @ni is situated
36 static inline MFT_RECORD *map_mft_record_page(ntfs_inode *ni)  in map_mft_record_page()  argument
39 	ntfs_volume *vol = ni->vol;  in map_mft_record_page()
45 	BUG_ON(ni->page);  in map_mft_record_page()
52 	index = (u64)ni->mft_no << vol->mft_record_size_bits >>  in map_mft_record_page()
54 	ofs = (ni->mft_no << vol->mft_record_size_bits) & ~PAGE_MASK;  in map_mft_record_page()
68 					"driver.", ni->mft_no);  in map_mft_record_page()
78 			ni->page = page;  in map_mft_record_page()
79 			ni->page_ofs = ofs;  in map_mft_record_page()
83 				"Run chkdsk.", ni->mft_no);  in map_mft_record_page()
89 	ni->page = NULL;  in map_mft_record_page()
90 	ni->page_ofs = 0;  in map_mft_record_page()
96  * @ni:		ntfs inode whose MFT record to map
144 MFT_RECORD *map_mft_record(ntfs_inode *ni)  in map_mft_record()  argument
148 	ntfs_debug("Entering for mft_no 0x%lx.", ni->mft_no);  in map_mft_record()
151 	atomic_inc(&ni->count);  in map_mft_record()
154 	mutex_lock(&ni->mrec_lock);  in map_mft_record()
156 	m = map_mft_record_page(ni);  in map_mft_record()
160 	mutex_unlock(&ni->mrec_lock);  in map_mft_record()
161 	atomic_dec(&ni->count);  in map_mft_record()
162 	ntfs_error(ni->vol->sb, "Failed with error code %lu.", -PTR_ERR(m));  in map_mft_record()
168  * @ni:		ntfs inode whose mft record page to unmap
170  * This unmaps the page in which the mft record of the ntfs inode @ni is
180 static inline void unmap_mft_record_page(ntfs_inode *ni)  in unmap_mft_record_page()  argument
182 	BUG_ON(!ni->page);  in unmap_mft_record_page()
185 	ntfs_unmap_page(ni->page);  in unmap_mft_record_page()
186 	ni->page = NULL;  in unmap_mft_record_page()
187 	ni->page_ofs = 0;  in unmap_mft_record_page()
193  * @ni:		ntfs inode whose MFT record to unmap
202 void unmap_mft_record(ntfs_inode *ni)  in unmap_mft_record()  argument
204 	struct page *page = ni->page;  in unmap_mft_record()
208 	ntfs_debug("Entering for mft_no 0x%lx.", ni->mft_no);  in unmap_mft_record()
210 	unmap_mft_record_page(ni);  in unmap_mft_record()
211 	mutex_unlock(&ni->mrec_lock);  in unmap_mft_record()
212 	atomic_dec(&ni->count);  in unmap_mft_record()
239 	ntfs_inode *ni = NULL;  in map_extent_mft_record()  local
261 			ni = extent_nis[i];  in map_extent_mft_record()
263 			atomic_inc(&ni->count);  in map_extent_mft_record()
267 	if (likely(ni != NULL)) {  in map_extent_mft_record()
271 		m = map_mft_record(ni);  in map_extent_mft_record()
273 		atomic_dec(&ni->count);  in map_extent_mft_record()
278 				*ntfs_ino = ni;  in map_extent_mft_record()
281 			unmap_mft_record(ni);  in map_extent_mft_record()
293 	ni = ntfs_new_extent_inode(base_ni->vol->sb, mft_no);  in map_extent_mft_record()
294 	if (unlikely(!ni)) {  in map_extent_mft_record()
299 	ni->vol = base_ni->vol;  in map_extent_mft_record()
300 	ni->seq_no = seq_no;  in map_extent_mft_record()
301 	ni->nr_extents = -1;  in map_extent_mft_record()
302 	ni->ext.base_ntfs_ino = base_ni;  in map_extent_mft_record()
304 	m = map_mft_record(ni);  in map_extent_mft_record()
308 		ntfs_clear_extent_inode(ni);  in map_extent_mft_record()
340 	base_ni->ext.extent_ntfs_inos[base_ni->nr_extents++] = ni;  in map_extent_mft_record()
344 	*ntfs_ino = ni;  in map_extent_mft_record()
347 	unmap_mft_record(ni);  in map_extent_mft_record()
355 		ntfs_clear_extent_inode(ni);  in map_extent_mft_record()
363  * @ni:		ntfs inode describing the mapped mft record
367  * Set the mapped (extent) mft record of the (base or extent) ntfs inode @ni,
384 void __mark_mft_record_dirty(ntfs_inode *ni)  in __mark_mft_record_dirty()  argument
388 	ntfs_debug("Entering for inode 0x%lx.", ni->mft_no);  in __mark_mft_record_dirty()
389 	BUG_ON(NInoAttr(ni));  in __mark_mft_record_dirty()
390 	mark_ntfs_record_dirty(ni->page, ni->page_ofs);  in __mark_mft_record_dirty()
392 	mutex_lock(&ni->extent_lock);  in __mark_mft_record_dirty()
393 	if (likely(ni->nr_extents >= 0))  in __mark_mft_record_dirty()
394 		base_ni = ni;  in __mark_mft_record_dirty()
396 		base_ni = ni->ext.base_ntfs_ino;  in __mark_mft_record_dirty()
397 	mutex_unlock(&ni->extent_lock);  in __mark_mft_record_dirty()
631  * @ni:		ntfs inode describing the mapped (extent) mft record
636  * ntfs inode @ni to backing store.  If the mft record @m has a counterpart in
639  * We only write the mft record if the ntfs inode @ni is dirty and the first
660 int write_mft_record_nolock(ntfs_inode *ni, MFT_RECORD *m, int sync)  in write_mft_record_nolock()  argument
662 	ntfs_volume *vol = ni->vol;  in write_mft_record_nolock()
663 	struct page *page = ni->page;  in write_mft_record_nolock()
673 	ntfs_debug("Entering for inode 0x%lx.", ni->mft_no);  in write_mft_record_nolock()
674 	BUG_ON(NInoAttr(ni));  in write_mft_record_nolock()
687 	if (!NInoTestClearDirty(ni))  in write_mft_record_nolock()
694 	m_start = ni->page_ofs;  in write_mft_record_nolock()
724 			vcn = ((VCN)ni->mft_no << vol->mft_record_size_bits) +  in write_mft_record_nolock()
750 						ni->mft_no, (long long)lcn);  in write_mft_record_nolock()
772 	flush_dcache_mft_record_page(ni);  in write_mft_record_nolock()
786 	if (!sync && ni->mft_no < vol->mftmirr_size)  in write_mft_record_nolock()
787 		ntfs_sync_mft_mirror(vol, ni->mft_no, m, sync);  in write_mft_record_nolock()
804 	if (sync && ni->mft_no < vol->mftmirr_size)  in write_mft_record_nolock()
805 		ntfs_sync_mft_mirror(vol, ni->mft_no, m, sync);  in write_mft_record_nolock()
808 	flush_dcache_mft_record_page(ni);  in write_mft_record_nolock()
814 				ni->mft_no);  in write_mft_record_nolock()
834 		mark_mft_record_dirty(ni);  in write_mft_record_nolock()
926 	ntfs_inode *ni, *eni, **extent_nis;  in ntfs_may_write_mft_record()  local
966 		ni = NTFS_I(vi);  in ntfs_may_write_mft_record()
968 		atomic_inc(&ni->count);  in ntfs_may_write_mft_record()
970 		if (NInoDirty(ni)) {  in ntfs_may_write_mft_record()
973 			atomic_dec(&ni->count);  in ntfs_may_write_mft_record()
979 		if (unlikely(!mutex_trylock(&ni->mrec_lock))) {  in ntfs_may_write_mft_record()
982 			atomic_dec(&ni->count);  in ntfs_may_write_mft_record()
992 		*locked_ni = ni;  in ntfs_may_write_mft_record()
1038 	ni = NTFS_I(vi);  in ntfs_may_write_mft_record()
1039 	mutex_lock(&ni->extent_lock);  in ntfs_may_write_mft_record()
1040 	if (ni->nr_extents <= 0) {  in ntfs_may_write_mft_record()
1045 		mutex_unlock(&ni->extent_lock);  in ntfs_may_write_mft_record()
1052 	extent_nis = ni->ext.extent_ntfs_inos;  in ntfs_may_write_mft_record()
1053 	for (eni = NULL, i = 0; i < ni->nr_extents; ++i) {  in ntfs_may_write_mft_record()
1068 		mutex_unlock(&ni->extent_lock);  in ntfs_may_write_mft_record()
1079 	mutex_unlock(&ni->extent_lock);  in ntfs_may_write_mft_record()
2247 	ntfs_inode *mft_ni, *mftbmp_ni, *ni;  in ntfs_mft_record_alloc()  local
2590 		m_tmp = map_extent_mft_record(base_ni, bit, &ni);  in ntfs_mft_record_alloc()
2647 		ni = NTFS_I(vi);  in ntfs_mft_record_alloc()
2656 			NInoSetMstProtected(ni);  in ntfs_mft_record_alloc()
2657 			ni->type = AT_INDEX_ALLOCATION;  in ntfs_mft_record_alloc()
2658 			ni->name = I30;  in ntfs_mft_record_alloc()
2659 			ni->name_len = 4;  in ntfs_mft_record_alloc()
2661 			ni->itype.index.block_size = 4096;  in ntfs_mft_record_alloc()
2662 			ni->itype.index.block_size_bits = ntfs_ffs(4096) - 1;  in ntfs_mft_record_alloc()
2663 			ni->itype.index.collation_rule = COLLATION_FILE_NAME;  in ntfs_mft_record_alloc()
2664 			if (vol->cluster_size <= ni->itype.index.block_size) {  in ntfs_mft_record_alloc()
2665 				ni->itype.index.vcn_size = vol->cluster_size;  in ntfs_mft_record_alloc()
2666 				ni->itype.index.vcn_size_bits =  in ntfs_mft_record_alloc()
2669 				ni->itype.index.vcn_size = vol->sector_size;  in ntfs_mft_record_alloc()
2670 				ni->itype.index.vcn_size_bits =  in ntfs_mft_record_alloc()
2677 			ni->type = AT_DATA;  in ntfs_mft_record_alloc()
2678 			ni->name = NULL;  in ntfs_mft_record_alloc()
2679 			ni->name_len = 0;  in ntfs_mft_record_alloc()
2694 		vi->i_generation = ni->seq_no = le16_to_cpu(m->sequence_number);  in ntfs_mft_record_alloc()
2699 		atomic_inc(&ni->count);  in ntfs_mft_record_alloc()
2700 		mutex_lock(&ni->mrec_lock);  in ntfs_mft_record_alloc()
2701 		ni->page = page;  in ntfs_mft_record_alloc()
2702 		ni->page_ofs = ofs;  in ntfs_mft_record_alloc()
2729 	return ni;  in ntfs_mft_record_alloc()
2755  * @ni:		ntfs inode of the mapped extent mft record to free
2756  * @m:		mapped extent mft record of the ntfs inode @ni
2758  * Free the mapped extent mft record @m of the extent ntfs inode @ni.
2760  * Note that this function unmaps the mft record and closes and destroys @ni
2761  * internally and hence you cannot use either @ni nor @m any more after this
2764  * On success return 0 and on error return -errno.  @ni and @m are still valid
2774 int ntfs_extent_mft_record_free(ntfs_inode *ni, MFT_RECORD *m)  in ntfs_extent_mft_record_free()  argument
2776 	unsigned long mft_no = ni->mft_no;  in ntfs_extent_mft_record_free()
2777 	ntfs_volume *vol = ni->vol;  in ntfs_extent_mft_record_free()
2784 	BUG_ON(NInoAttr(ni));  in ntfs_extent_mft_record_free()
2785 	BUG_ON(ni->nr_extents != -1);  in ntfs_extent_mft_record_free()
2787 	mutex_lock(&ni->extent_lock);  in ntfs_extent_mft_record_free()
2788 	base_ni = ni->ext.base_ntfs_ino;  in ntfs_extent_mft_record_free()
2789 	mutex_unlock(&ni->extent_lock);  in ntfs_extent_mft_record_free()
2799 	if (atomic_read(&ni->count) > 2) {  in ntfs_extent_mft_record_free()
2810 		if (ni != extent_nis[i])  in ntfs_extent_mft_record_free()
2851 	NInoSetDirty(ni);  in ntfs_extent_mft_record_free()
2852 	err = write_mft_record(ni, m, 0);  in ntfs_extent_mft_record_free()
2860 	unmap_extent_mft_record(ni);  in ntfs_extent_mft_record_free()
2861 	ntfs_clear_extent_inode(ni);  in ntfs_extent_mft_record_free()
2902 	extent_nis[base_ni->nr_extents++] = ni;  in ntfs_extent_mft_record_free()
2904 	mark_mft_record_dirty(ni);  in ntfs_extent_mft_record_free()