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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /fs/ntfs3/frecord.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/ntfs3/frecord.c')
-rw-r--r--fs/ntfs3/frecord.c3368
1 files changed, 3368 insertions, 0 deletions
diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c
new file mode 100644
index 000000000..bb7e33c24
--- /dev/null
+++ b/fs/ntfs3/frecord.c
@@ -0,0 +1,3368 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *
+ * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
+ *
+ */
+
+#include <linux/fiemap.h>
+#include <linux/fs.h>
+#include <linux/minmax.h>
+#include <linux/vmalloc.h>
+
+#include "debug.h"
+#include "ntfs.h"
+#include "ntfs_fs.h"
+#ifdef CONFIG_NTFS3_LZX_XPRESS
+#include "lib/lib.h"
+#endif
+
+static struct mft_inode *ni_ins_mi(struct ntfs_inode *ni, struct rb_root *tree,
+ CLST ino, struct rb_node *ins)
+{
+ struct rb_node **p = &tree->rb_node;
+ struct rb_node *pr = NULL;
+
+ while (*p) {
+ struct mft_inode *mi;
+
+ pr = *p;
+ mi = rb_entry(pr, struct mft_inode, node);
+ if (mi->rno > ino)
+ p = &pr->rb_left;
+ else if (mi->rno < ino)
+ p = &pr->rb_right;
+ else
+ return mi;
+ }
+
+ if (!ins)
+ return NULL;
+
+ rb_link_node(ins, pr, p);
+ rb_insert_color(ins, tree);
+ return rb_entry(ins, struct mft_inode, node);
+}
+
+/*
+ * ni_find_mi - Find mft_inode by record number.
+ */
+static struct mft_inode *ni_find_mi(struct ntfs_inode *ni, CLST rno)
+{
+ return ni_ins_mi(ni, &ni->mi_tree, rno, NULL);
+}
+
+/*
+ * ni_add_mi - Add new mft_inode into ntfs_inode.
+ */
+static void ni_add_mi(struct ntfs_inode *ni, struct mft_inode *mi)
+{
+ ni_ins_mi(ni, &ni->mi_tree, mi->rno, &mi->node);
+}
+
+/*
+ * ni_remove_mi - Remove mft_inode from ntfs_inode.
+ */
+void ni_remove_mi(struct ntfs_inode *ni, struct mft_inode *mi)
+{
+ rb_erase(&mi->node, &ni->mi_tree);
+}
+
+/*
+ * ni_std - Return: Pointer into std_info from primary record.
+ */
+struct ATTR_STD_INFO *ni_std(struct ntfs_inode *ni)
+{
+ const struct ATTRIB *attr;
+
+ attr = mi_find_attr(&ni->mi, NULL, ATTR_STD, NULL, 0, NULL);
+ return attr ? resident_data_ex(attr, sizeof(struct ATTR_STD_INFO))
+ : NULL;
+}
+
+/*
+ * ni_std5
+ *
+ * Return: Pointer into std_info from primary record.
+ */
+struct ATTR_STD_INFO5 *ni_std5(struct ntfs_inode *ni)
+{
+ const struct ATTRIB *attr;
+
+ attr = mi_find_attr(&ni->mi, NULL, ATTR_STD, NULL, 0, NULL);
+
+ return attr ? resident_data_ex(attr, sizeof(struct ATTR_STD_INFO5))
+ : NULL;
+}
+
+/*
+ * ni_clear - Clear resources allocated by ntfs_inode.
+ */
+void ni_clear(struct ntfs_inode *ni)
+{
+ struct rb_node *node;
+
+ if (!ni->vfs_inode.i_nlink && is_rec_inuse(ni->mi.mrec))
+ ni_delete_all(ni);
+
+ al_destroy(ni);
+
+ for (node = rb_first(&ni->mi_tree); node;) {
+ struct rb_node *next = rb_next(node);
+ struct mft_inode *mi = rb_entry(node, struct mft_inode, node);
+
+ rb_erase(node, &ni->mi_tree);
+ mi_put(mi);
+ node = next;
+ }
+
+ /* Bad inode always has mode == S_IFREG. */
+ if (ni->ni_flags & NI_FLAG_DIR)
+ indx_clear(&ni->dir);
+ else {
+ run_close(&ni->file.run);
+#ifdef CONFIG_NTFS3_LZX_XPRESS
+ if (ni->file.offs_page) {
+ /* On-demand allocated page for offsets. */
+ put_page(ni->file.offs_page);
+ ni->file.offs_page = NULL;
+ }
+#endif
+ }
+
+ mi_clear(&ni->mi);
+}
+
+/*
+ * ni_load_mi_ex - Find mft_inode by record number.
+ */
+int ni_load_mi_ex(struct ntfs_inode *ni, CLST rno, struct mft_inode **mi)
+{
+ int err;
+ struct mft_inode *r;
+
+ r = ni_find_mi(ni, rno);
+ if (r)
+ goto out;
+
+ err = mi_get(ni->mi.sbi, rno, &r);
+ if (err)
+ return err;
+
+ ni_add_mi(ni, r);
+
+out:
+ if (mi)
+ *mi = r;
+ return 0;
+}
+
+/*
+ * ni_load_mi - Load mft_inode corresponded list_entry.
+ */
+int ni_load_mi(struct ntfs_inode *ni, const struct ATTR_LIST_ENTRY *le,
+ struct mft_inode **mi)
+{
+ CLST rno;
+
+ if (!le) {
+ *mi = &ni->mi;
+ return 0;
+ }
+
+ rno = ino_get(&le->ref);
+ if (rno == ni->mi.rno) {
+ *mi = &ni->mi;
+ return 0;
+ }
+ return ni_load_mi_ex(ni, rno, mi);
+}
+
+/*
+ * ni_find_attr
+ *
+ * Return: Attribute and record this attribute belongs to.
+ */
+struct ATTRIB *ni_find_attr(struct ntfs_inode *ni, struct ATTRIB *attr,
+ struct ATTR_LIST_ENTRY **le_o, enum ATTR_TYPE type,
+ const __le16 *name, u8 name_len, const CLST *vcn,
+ struct mft_inode **mi)
+{
+ struct ATTR_LIST_ENTRY *le;
+ struct mft_inode *m;
+
+ if (!ni->attr_list.size ||
+ (!name_len && (type == ATTR_LIST || type == ATTR_STD))) {
+ if (le_o)
+ *le_o = NULL;
+ if (mi)
+ *mi = &ni->mi;
+
+ /* Look for required attribute in primary record. */
+ return mi_find_attr(&ni->mi, attr, type, name, name_len, NULL);
+ }
+
+ /* First look for list entry of required type. */
+ le = al_find_ex(ni, le_o ? *le_o : NULL, type, name, name_len, vcn);
+ if (!le)
+ return NULL;
+
+ if (le_o)
+ *le_o = le;
+
+ /* Load record that contains this attribute. */
+ if (ni_load_mi(ni, le, &m))
+ return NULL;
+
+ /* Look for required attribute. */
+ attr = mi_find_attr(m, NULL, type, name, name_len, &le->id);
+
+ if (!attr)
+ goto out;
+
+ if (!attr->non_res) {
+ if (vcn && *vcn)
+ goto out;
+ } else if (!vcn) {
+ if (attr->nres.svcn)
+ goto out;
+ } else if (le64_to_cpu(attr->nres.svcn) > *vcn ||
+ *vcn > le64_to_cpu(attr->nres.evcn)) {
+ goto out;
+ }
+
+ if (mi)
+ *mi = m;
+ return attr;
+
+out:
+ ntfs_set_state(ni->mi.sbi, NTFS_DIRTY_ERROR);
+ return NULL;
+}
+
+/*
+ * ni_enum_attr_ex - Enumerates attributes in ntfs_inode.
+ */
+struct ATTRIB *ni_enum_attr_ex(struct ntfs_inode *ni, struct ATTRIB *attr,
+ struct ATTR_LIST_ENTRY **le,
+ struct mft_inode **mi)
+{
+ struct mft_inode *mi2;
+ struct ATTR_LIST_ENTRY *le2;
+
+ /* Do we have an attribute list? */
+ if (!ni->attr_list.size) {
+ *le = NULL;
+ if (mi)
+ *mi = &ni->mi;
+ /* Enum attributes in primary record. */
+ return mi_enum_attr(&ni->mi, attr);
+ }
+
+ /* Get next list entry. */
+ le2 = *le = al_enumerate(ni, attr ? *le : NULL);
+ if (!le2)
+ return NULL;
+
+ /* Load record that contains the required attribute. */
+ if (ni_load_mi(ni, le2, &mi2))
+ return NULL;
+
+ if (mi)
+ *mi = mi2;
+
+ /* Find attribute in loaded record. */
+ return rec_find_attr_le(mi2, le2);
+}
+
+/*
+ * ni_load_attr - Load attribute that contains given VCN.
+ */
+struct ATTRIB *ni_load_attr(struct ntfs_inode *ni, enum ATTR_TYPE type,
+ const __le16 *name, u8 name_len, CLST vcn,
+ struct mft_inode **pmi)
+{
+ struct ATTR_LIST_ENTRY *le;
+ struct ATTRIB *attr;
+ struct mft_inode *mi;
+ struct ATTR_LIST_ENTRY *next;
+
+ if (!ni->attr_list.size) {
+ if (pmi)
+ *pmi = &ni->mi;
+ return mi_find_attr(&ni->mi, NULL, type, name, name_len, NULL);
+ }
+
+ le = al_find_ex(ni, NULL, type, name, name_len, NULL);
+ if (!le)
+ return NULL;
+
+ /*
+ * Unfortunately ATTR_LIST_ENTRY contains only start VCN.
+ * So to find the ATTRIB segment that contains 'vcn' we should
+ * enumerate some entries.
+ */
+ if (vcn) {
+ for (;; le = next) {
+ next = al_find_ex(ni, le, type, name, name_len, NULL);
+ if (!next || le64_to_cpu(next->vcn) > vcn)
+ break;
+ }
+ }
+
+ if (ni_load_mi(ni, le, &mi))
+ return NULL;
+
+ if (pmi)
+ *pmi = mi;
+
+ attr = mi_find_attr(mi, NULL, type, name, name_len, &le->id);
+ if (!attr)
+ return NULL;
+
+ if (!attr->non_res)
+ return attr;
+
+ if (le64_to_cpu(attr->nres.svcn) <= vcn &&
+ vcn <= le64_to_cpu(attr->nres.evcn))
+ return attr;
+
+ return NULL;
+}
+
+/*
+ * ni_load_all_mi - Load all subrecords.
+ */
+int ni_load_all_mi(struct ntfs_inode *ni)
+{
+ int err;
+ struct ATTR_LIST_ENTRY *le;
+
+ if (!ni->attr_list.size)
+ return 0;
+
+ le = NULL;
+
+ while ((le = al_enumerate(ni, le))) {
+ CLST rno = ino_get(&le->ref);
+
+ if (rno == ni->mi.rno)
+ continue;
+
+ err = ni_load_mi_ex(ni, rno, NULL);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+/*
+ * ni_add_subrecord - Allocate + format + attach a new subrecord.
+ */
+bool ni_add_subrecord(struct ntfs_inode *ni, CLST rno, struct mft_inode **mi)
+{
+ struct mft_inode *m;
+
+ m = kzalloc(sizeof(struct mft_inode), GFP_NOFS);
+ if (!m)
+ return false;
+
+ if (mi_format_new(m, ni->mi.sbi, rno, 0, ni->mi.rno == MFT_REC_MFT)) {
+ mi_put(m);
+ return false;
+ }
+
+ mi_get_ref(&ni->mi, &m->mrec->parent_ref);
+
+ ni_add_mi(ni, m);
+ *mi = m;
+ return true;
+}
+
+/*
+ * ni_remove_attr - Remove all attributes for the given type/name/id.
+ */
+int ni_remove_attr(struct ntfs_inode *ni, enum ATTR_TYPE type,
+ const __le16 *name, size_t name_len, bool base_only,
+ const __le16 *id)
+{
+ int err;
+ struct ATTRIB *attr;
+ struct ATTR_LIST_ENTRY *le;
+ struct mft_inode *mi;
+ u32 type_in;
+ int diff;
+
+ if (base_only || type == ATTR_LIST || !ni->attr_list.size) {
+ attr = mi_find_attr(&ni->mi, NULL, type, name, name_len, id);
+ if (!attr)
+ return -ENOENT;
+
+ mi_remove_attr(ni, &ni->mi, attr);
+ return 0;
+ }
+
+ type_in = le32_to_cpu(type);
+ le = NULL;
+
+ for (;;) {
+ le = al_enumerate(ni, le);
+ if (!le)
+ return 0;
+
+next_le2:
+ diff = le32_to_cpu(le->type) - type_in;
+ if (diff < 0)
+ continue;
+
+ if (diff > 0)
+ return 0;
+
+ if (le->name_len != name_len)
+ continue;
+
+ if (name_len &&
+ memcmp(le_name(le), name, name_len * sizeof(short)))
+ continue;
+
+ if (id && le->id != *id)
+ continue;
+ err = ni_load_mi(ni, le, &mi);
+ if (err)
+ return err;
+
+ al_remove_le(ni, le);
+
+ attr = mi_find_attr(mi, NULL, type, name, name_len, id);
+ if (!attr)
+ return -ENOENT;
+
+ mi_remove_attr(ni, mi, attr);
+
+ if (PtrOffset(ni->attr_list.le, le) >= ni->attr_list.size)
+ return 0;
+ goto next_le2;
+ }
+}
+
+/*
+ * ni_ins_new_attr - Insert the attribute into record.
+ *
+ * Return: Not full constructed attribute or NULL if not possible to create.
+ */
+static struct ATTRIB *
+ni_ins_new_attr(struct ntfs_inode *ni, struct mft_inode *mi,
+ struct ATTR_LIST_ENTRY *le, enum ATTR_TYPE type,
+ const __le16 *name, u8 name_len, u32 asize, u16 name_off,
+ CLST svcn, struct ATTR_LIST_ENTRY **ins_le)
+{
+ int err;
+ struct ATTRIB *attr;
+ bool le_added = false;
+ struct MFT_REF ref;
+
+ mi_get_ref(mi, &ref);
+
+ if (type != ATTR_LIST && !le && ni->attr_list.size) {
+ err = al_add_le(ni, type, name, name_len, svcn, cpu_to_le16(-1),
+ &ref, &le);
+ if (err) {
+ /* No memory or no space. */
+ return ERR_PTR(err);
+ }
+ le_added = true;
+
+ /*
+ * al_add_le -> attr_set_size (list) -> ni_expand_list
+ * which moves some attributes out of primary record
+ * this means that name may point into moved memory
+ * reinit 'name' from le.
+ */
+ name = le->name;
+ }
+
+ attr = mi_insert_attr(mi, type, name, name_len, asize, name_off);
+ if (!attr) {
+ if (le_added)
+ al_remove_le(ni, le);
+ return NULL;
+ }
+
+ if (type == ATTR_LIST) {
+ /* Attr list is not in list entry array. */
+ goto out;
+ }
+
+ if (!le)
+ goto out;
+
+ /* Update ATTRIB Id and record reference. */
+ le->id = attr->id;
+ ni->attr_list.dirty = true;
+ le->ref = ref;
+
+out:
+ if (ins_le)
+ *ins_le = le;
+ return attr;
+}
+
+/*
+ * ni_repack
+ *
+ * Random write access to sparsed or compressed file may result to
+ * not optimized packed runs.
+ * Here is the place to optimize it.
+ */
+static int ni_repack(struct ntfs_inode *ni)
+{
+ int err = 0;
+ struct ntfs_sb_info *sbi = ni->mi.sbi;
+ struct mft_inode *mi, *mi_p = NULL;
+ struct ATTRIB *attr = NULL, *attr_p;
+ struct ATTR_LIST_ENTRY *le = NULL, *le_p;
+ CLST alloc = 0;
+ u8 cluster_bits = sbi->cluster_bits;
+ CLST svcn, evcn = 0, svcn_p, evcn_p, next_svcn;
+ u32 roff, rs = sbi->record_size;
+ struct runs_tree run;
+
+ run_init(&run);
+
+ while ((attr = ni_enum_attr_ex(ni, attr, &le, &mi))) {
+ if (!attr->non_res)
+ continue;
+
+ svcn = le64_to_cpu(attr->nres.svcn);
+ if (svcn != le64_to_cpu(le->vcn)) {
+ err = -EINVAL;
+ break;
+ }
+
+ if (!svcn) {
+ alloc = le64_to_cpu(attr->nres.alloc_size) >>
+ cluster_bits;
+ mi_p = NULL;
+ } else if (svcn != evcn + 1) {
+ err = -EINVAL;
+ break;
+ }
+
+ evcn = le64_to_cpu(attr->nres.evcn);
+
+ if (svcn > evcn + 1) {
+ err = -EINVAL;
+ break;
+ }
+
+ if (!mi_p) {
+ /* Do not try if not enogh free space. */
+ if (le32_to_cpu(mi->mrec->used) + 8 >= rs)
+ continue;
+
+ /* Do not try if last attribute segment. */
+ if (evcn + 1 == alloc)
+ continue;
+ run_close(&run);
+ }
+
+ roff = le16_to_cpu(attr->nres.run_off);
+
+ if (roff > le32_to_cpu(attr->size)) {
+ err = -EINVAL;
+ break;
+ }
+
+ err = run_unpack(&run, sbi, ni->mi.rno, svcn, evcn, svcn,
+ Add2Ptr(attr, roff),
+ le32_to_cpu(attr->size) - roff);
+ if (err < 0)
+ break;
+
+ if (!mi_p) {
+ mi_p = mi;
+ attr_p = attr;
+ svcn_p = svcn;
+ evcn_p = evcn;
+ le_p = le;
+ err = 0;
+ continue;
+ }
+
+ /*
+ * Run contains data from two records: mi_p and mi
+ * Try to pack in one.
+ */
+ err = mi_pack_runs(mi_p, attr_p, &run, evcn + 1 - svcn_p);
+ if (err)
+ break;
+
+ next_svcn = le64_to_cpu(attr_p->nres.evcn) + 1;
+
+ if (next_svcn >= evcn + 1) {
+ /* We can remove this attribute segment. */
+ al_remove_le(ni, le);
+ mi_remove_attr(NULL, mi, attr);
+ le = le_p;
+ continue;
+ }
+
+ attr->nres.svcn = le->vcn = cpu_to_le64(next_svcn);
+ mi->dirty = true;
+ ni->attr_list.dirty = true;
+
+ if (evcn + 1 == alloc) {
+ err = mi_pack_runs(mi, attr, &run,
+ evcn + 1 - next_svcn);
+ if (err)
+ break;
+ mi_p = NULL;
+ } else {
+ mi_p = mi;
+ attr_p = attr;
+ svcn_p = next_svcn;
+ evcn_p = evcn;
+ le_p = le;
+ run_truncate_head(&run, next_svcn);
+ }
+ }
+
+ if (err) {
+ ntfs_inode_warn(&ni->vfs_inode, "repack problem");
+ ntfs_set_state(sbi, NTFS_DIRTY_ERROR);
+
+ /* Pack loaded but not packed runs. */
+ if (mi_p)
+ mi_pack_runs(mi_p, attr_p, &run, evcn_p + 1 - svcn_p);
+ }
+
+ run_close(&run);
+ return err;
+}
+
+/*
+ * ni_try_remove_attr_list
+ *
+ * Can we remove attribute list?
+ * Check the case when primary record contains enough space for all attributes.
+ */
+static int ni_try_remove_attr_list(struct ntfs_inode *ni)
+{
+ int err = 0;
+ struct ntfs_sb_info *sbi = ni->mi.sbi;
+ struct ATTRIB *attr, *attr_list, *attr_ins;
+ struct ATTR_LIST_ENTRY *le;
+ struct mft_inode *mi;
+ u32 asize, free;
+ struct MFT_REF ref;
+ struct MFT_REC *mrec;
+ __le16 id;
+
+ if (!ni->attr_list.dirty)
+ return 0;
+
+ err = ni_repack(ni);
+ if (err)
+ return err;
+
+ attr_list = mi_find_attr(&ni->mi, NULL, ATTR_LIST, NULL, 0, NULL);
+ if (!attr_list)
+ return 0;
+
+ asize = le32_to_cpu(attr_list->size);
+
+ /* Free space in primary record without attribute list. */
+ free = sbi->record_size - le32_to_cpu(ni->mi.mrec->used) + asize;
+ mi_get_ref(&ni->mi, &ref);
+
+ le = NULL;
+ while ((le = al_enumerate(ni, le))) {
+ if (!memcmp(&le->ref, &ref, sizeof(ref)))
+ continue;
+
+ if (le->vcn)
+ return 0;
+
+ mi = ni_find_mi(ni, ino_get(&le->ref));
+ if (!mi)
+ return 0;
+
+ attr = mi_find_attr(mi, NULL, le->type, le_name(le),
+ le->name_len, &le->id);
+ if (!attr)
+ return 0;
+
+ asize = le32_to_cpu(attr->size);
+ if (asize > free)
+ return 0;
+
+ free -= asize;
+ }
+
+ /* Make a copy of primary record to restore if error. */
+ mrec = kmemdup(ni->mi.mrec, sbi->record_size, GFP_NOFS);
+ if (!mrec)
+ return 0; /* Not critical. */
+
+ /* It seems that attribute list can be removed from primary record. */
+ mi_remove_attr(NULL, &ni->mi, attr_list);
+
+ /*
+ * Repeat the cycle above and copy all attributes to primary record.
+ * Do not remove original attributes from subrecords!
+ * It should be success!
+ */
+ le = NULL;
+ while ((le = al_enumerate(ni, le))) {
+ if (!memcmp(&le->ref, &ref, sizeof(ref)))
+ continue;
+
+ mi = ni_find_mi(ni, ino_get(&le->ref));
+ if (!mi) {
+ /* Should never happened, 'cause already checked. */
+ goto out;
+ }
+
+ attr = mi_find_attr(mi, NULL, le->type, le_name(le),
+ le->name_len, &le->id);
+ if (!attr) {
+ /* Should never happened, 'cause already checked. */
+ goto out;
+ }
+ asize = le32_to_cpu(attr->size);
+
+ /* Insert into primary record. */
+ attr_ins = mi_insert_attr(&ni->mi, le->type, le_name(le),
+ le->name_len, asize,
+ le16_to_cpu(attr->name_off));
+ if (!attr_ins) {
+ /*
+ * No space in primary record (already checked).
+ */
+ goto out;
+ }
+
+ /* Copy all except id. */
+ id = attr_ins->id;
+ memcpy(attr_ins, attr, asize);
+ attr_ins->id = id;
+ }
+
+ /*
+ * Repeat the cycle above and remove all attributes from subrecords.
+ */
+ le = NULL;
+ while ((le = al_enumerate(ni, le))) {
+ if (!memcmp(&le->ref, &ref, sizeof(ref)))
+ continue;
+
+ mi = ni_find_mi(ni, ino_get(&le->ref));
+ if (!mi)
+ continue;
+
+ attr = mi_find_attr(mi, NULL, le->type, le_name(le),
+ le->name_len, &le->id);
+ if (!attr)
+ continue;
+
+ /* Remove from original record. */
+ mi_remove_attr(NULL, mi, attr);
+ }
+
+ run_deallocate(sbi, &ni->attr_list.run, true);
+ run_close(&ni->attr_list.run);
+ ni->attr_list.size = 0;
+ kfree(ni->attr_list.le);
+ ni->attr_list.le = NULL;
+ ni->attr_list.dirty = false;
+
+ kfree(mrec);
+ return 0;
+out:
+ /* Restore primary record. */
+ swap(mrec, ni->mi.mrec);
+ kfree(mrec);
+ return 0;
+}
+
+/*
+ * ni_create_attr_list - Generates an attribute list for this primary record.
+ */
+int ni_create_attr_list(struct ntfs_inode *ni)
+{
+ struct ntfs_sb_info *sbi = ni->mi.sbi;
+ int err;
+ u32 lsize;
+ struct ATTRIB *attr;
+ struct ATTRIB *arr_move[7];
+ struct ATTR_LIST_ENTRY *le, *le_b[7];
+ struct MFT_REC *rec;
+ bool is_mft;
+ CLST rno = 0;
+ struct mft_inode *mi;
+ u32 free_b, nb, to_free, rs;
+ u16 sz;
+
+ is_mft = ni->mi.rno == MFT_REC_MFT;
+ rec = ni->mi.mrec;
+ rs = sbi->record_size;
+
+ /*
+ * Skip estimating exact memory requirement.
+ * Looks like one record_size is always enough.
+ */
+ le = kmalloc(al_aligned(rs), GFP_NOFS);
+ if (!le) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ mi_get_ref(&ni->mi, &le->ref);
+ ni->attr_list.le = le;
+
+ attr = NULL;
+ nb = 0;
+ free_b = 0;
+ attr = NULL;
+
+ for (; (attr = mi_enum_attr(&ni->mi, attr)); le = Add2Ptr(le, sz)) {
+ sz = le_size(attr->name_len);
+ le->type = attr->type;
+ le->size = cpu_to_le16(sz);
+ le->name_len = attr->name_len;
+ le->name_off = offsetof(struct ATTR_LIST_ENTRY, name);
+ le->vcn = 0;
+ if (le != ni->attr_list.le)
+ le->ref = ni->attr_list.le->ref;
+ le->id = attr->id;
+
+ if (attr->name_len)
+ memcpy(le->name, attr_name(attr),
+ sizeof(short) * attr->name_len);
+ else if (attr->type == ATTR_STD)
+ continue;
+ else if (attr->type == ATTR_LIST)
+ continue;
+ else if (is_mft && attr->type == ATTR_DATA)
+ continue;
+
+ if (!nb || nb < ARRAY_SIZE(arr_move)) {
+ le_b[nb] = le;
+ arr_move[nb++] = attr;
+ free_b += le32_to_cpu(attr->size);
+ }
+ }
+
+ lsize = PtrOffset(ni->attr_list.le, le);
+ ni->attr_list.size = lsize;
+
+ to_free = le32_to_cpu(rec->used) + lsize + SIZEOF_RESIDENT;
+ if (to_free <= rs) {
+ to_free = 0;
+ } else {
+ to_free -= rs;
+
+ if (to_free > free_b) {
+ err = -EINVAL;
+ goto out1;
+ }
+ }
+
+ /* Allocate child MFT. */
+ err = ntfs_look_free_mft(sbi, &rno, is_mft, ni, &mi);
+ if (err)
+ goto out1;
+
+ err = -EINVAL;
+ /* Call mi_remove_attr() in reverse order to keep pointers 'arr_move' valid. */
+ while (to_free > 0) {
+ struct ATTRIB *b = arr_move[--nb];
+ u32 asize = le32_to_cpu(b->size);
+ u16 name_off = le16_to_cpu(b->name_off);
+
+ attr = mi_insert_attr(mi, b->type, Add2Ptr(b, name_off),
+ b->name_len, asize, name_off);
+ if (!attr)
+ goto out1;
+
+ mi_get_ref(mi, &le_b[nb]->ref);
+ le_b[nb]->id = attr->id;
+
+ /* Copy all except id. */
+ memcpy(attr, b, asize);
+ attr->id = le_b[nb]->id;
+
+ /* Remove from primary record. */
+ if (!mi_remove_attr(NULL, &ni->mi, b))
+ goto out1;
+
+ if (to_free <= asize)
+ break;
+ to_free -= asize;
+ if (!nb)
+ goto out1;
+ }
+
+ attr = mi_insert_attr(&ni->mi, ATTR_LIST, NULL, 0,
+ lsize + SIZEOF_RESIDENT, SIZEOF_RESIDENT);
+ if (!attr)
+ goto out1;
+
+ attr->non_res = 0;
+ attr->flags = 0;
+ attr->res.data_size = cpu_to_le32(lsize);
+ attr->res.data_off = SIZEOF_RESIDENT_LE;
+ attr->res.flags = 0;
+ attr->res.res = 0;
+
+ memcpy(resident_data_ex(attr, lsize), ni->attr_list.le, lsize);
+
+ ni->attr_list.dirty = false;
+
+ mark_inode_dirty(&ni->vfs_inode);
+ goto out;
+
+out1:
+ kfree(ni->attr_list.le);
+ ni->attr_list.le = NULL;
+ ni->attr_list.size = 0;
+ return err;
+
+out:
+ return 0;
+}
+
+/*
+ * ni_ins_attr_ext - Add an external attribute to the ntfs_inode.
+ */
+static int ni_ins_attr_ext(struct ntfs_inode *ni, struct ATTR_LIST_ENTRY *le,
+ enum ATTR_TYPE type, const __le16 *name, u8 name_len,
+ u32 asize, CLST svcn, u16 name_off, bool force_ext,
+ struct ATTRIB **ins_attr, struct mft_inode **ins_mi,
+ struct ATTR_LIST_ENTRY **ins_le)
+{
+ struct ATTRIB *attr;
+ struct mft_inode *mi;
+ CLST rno;
+ u64 vbo;
+ struct rb_node *node;
+ int err;
+ bool is_mft, is_mft_data;
+ struct ntfs_sb_info *sbi = ni->mi.sbi;
+
+ is_mft = ni->mi.rno == MFT_REC_MFT;
+ is_mft_data = is_mft && type == ATTR_DATA && !name_len;
+
+ if (asize > sbi->max_bytes_per_attr) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ /*
+ * Standard information and attr_list cannot be made external.
+ * The Log File cannot have any external attributes.
+ */
+ if (type == ATTR_STD || type == ATTR_LIST ||
+ ni->mi.rno == MFT_REC_LOG) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ /* Create attribute list if it is not already existed. */
+ if (!ni->attr_list.size) {
+ err = ni_create_attr_list(ni);
+ if (err)
+ goto out;
+ }
+
+ vbo = is_mft_data ? ((u64)svcn << sbi->cluster_bits) : 0;
+
+ if (force_ext)
+ goto insert_ext;
+
+ /* Load all subrecords into memory. */
+ err = ni_load_all_mi(ni);
+ if (err)
+ goto out;
+
+ /* Check each of loaded subrecord. */
+ for (node = rb_first(&ni->mi_tree); node; node = rb_next(node)) {
+ mi = rb_entry(node, struct mft_inode, node);
+
+ if (is_mft_data &&
+ (mi_enum_attr(mi, NULL) ||
+ vbo <= ((u64)mi->rno << sbi->record_bits))) {
+ /* We can't accept this record 'cause MFT's bootstrapping. */
+ continue;
+ }
+ if (is_mft &&
+ mi_find_attr(mi, NULL, ATTR_DATA, NULL, 0, NULL)) {
+ /*
+ * This child record already has a ATTR_DATA.
+ * So it can't accept any other records.
+ */
+ continue;
+ }
+
+ if ((type != ATTR_NAME || name_len) &&
+ mi_find_attr(mi, NULL, type, name, name_len, NULL)) {
+ /* Only indexed attributes can share same record. */
+ continue;
+ }
+
+ /*
+ * Do not try to insert this attribute
+ * if there is no room in record.
+ */
+ if (le32_to_cpu(mi->mrec->used) + asize > sbi->record_size)
+ continue;
+
+ /* Try to insert attribute into this subrecord. */
+ attr = ni_ins_new_attr(ni, mi, le, type, name, name_len, asize,
+ name_off, svcn, ins_le);
+ if (!attr)
+ continue;
+ if (IS_ERR(attr))
+ return PTR_ERR(attr);
+
+ if (ins_attr)
+ *ins_attr = attr;
+ if (ins_mi)
+ *ins_mi = mi;
+ return 0;
+ }
+
+insert_ext:
+ /* We have to allocate a new child subrecord. */
+ err = ntfs_look_free_mft(sbi, &rno, is_mft_data, ni, &mi);
+ if (err)
+ goto out;
+
+ if (is_mft_data && vbo <= ((u64)rno << sbi->record_bits)) {
+ err = -EINVAL;
+ goto out1;
+ }
+
+ attr = ni_ins_new_attr(ni, mi, le, type, name, name_len, asize,
+ name_off, svcn, ins_le);
+ if (!attr) {
+ err = -EINVAL;
+ goto out2;
+ }
+
+ if (IS_ERR(attr)) {
+ err = PTR_ERR(attr);
+ goto out2;
+ }
+
+ if (ins_attr)
+ *ins_attr = attr;
+ if (ins_mi)
+ *ins_mi = mi;
+
+ return 0;
+
+out2:
+ ni_remove_mi(ni, mi);
+ mi_put(mi);
+
+out1:
+ ntfs_mark_rec_free(sbi, rno, is_mft);
+
+out:
+ return err;
+}
+
+/*
+ * ni_insert_attr - Insert an attribute into the file.
+ *
+ * If the primary record has room, it will just insert the attribute.
+ * If not, it may make the attribute external.
+ * For $MFT::Data it may make room for the attribute by
+ * making other attributes external.
+ *
+ * NOTE:
+ * The ATTR_LIST and ATTR_STD cannot be made external.
+ * This function does not fill new attribute full.
+ * It only fills 'size'/'type'/'id'/'name_len' fields.
+ */
+static int ni_insert_attr(struct ntfs_inode *ni, enum ATTR_TYPE type,
+ const __le16 *name, u8 name_len, u32 asize,
+ u16 name_off, CLST svcn, struct ATTRIB **ins_attr,
+ struct mft_inode **ins_mi,
+ struct ATTR_LIST_ENTRY **ins_le)
+{
+ struct ntfs_sb_info *sbi = ni->mi.sbi;
+ int err;
+ struct ATTRIB *attr, *eattr;
+ struct MFT_REC *rec;
+ bool is_mft;
+ struct ATTR_LIST_ENTRY *le;
+ u32 list_reserve, max_free, free, used, t32;
+ __le16 id;
+ u16 t16;
+
+ is_mft = ni->mi.rno == MFT_REC_MFT;
+ rec = ni->mi.mrec;
+
+ list_reserve = SIZEOF_NONRESIDENT + 3 * (1 + 2 * sizeof(u32));
+ used = le32_to_cpu(rec->used);
+ free = sbi->record_size - used;
+
+ if (is_mft && type != ATTR_LIST) {
+ /* Reserve space for the ATTRIB list. */
+ if (free < list_reserve)
+ free = 0;
+ else
+ free -= list_reserve;
+ }
+
+ if (asize <= free) {
+ attr = ni_ins_new_attr(ni, &ni->mi, NULL, type, name, name_len,
+ asize, name_off, svcn, ins_le);
+ if (IS_ERR(attr)) {
+ err = PTR_ERR(attr);
+ goto out;
+ }
+
+ if (attr) {
+ if (ins_attr)
+ *ins_attr = attr;
+ if (ins_mi)
+ *ins_mi = &ni->mi;
+ err = 0;
+ goto out;
+ }
+ }
+
+ if (!is_mft || type != ATTR_DATA || svcn) {
+ /* This ATTRIB will be external. */
+ err = ni_ins_attr_ext(ni, NULL, type, name, name_len, asize,
+ svcn, name_off, false, ins_attr, ins_mi,
+ ins_le);
+ goto out;
+ }
+
+ /*
+ * Here we have: "is_mft && type == ATTR_DATA && !svcn"
+ *
+ * The first chunk of the $MFT::Data ATTRIB must be the base record.
+ * Evict as many other attributes as possible.
+ */
+ max_free = free;
+
+ /* Estimate the result of moving all possible attributes away. */
+ attr = NULL;
+
+ while ((attr = mi_enum_attr(&ni->mi, attr))) {
+ if (attr->type == ATTR_STD)
+ continue;
+ if (attr->type == ATTR_LIST)
+ continue;
+ max_free += le32_to_cpu(attr->size);
+ }
+
+ if (max_free < asize + list_reserve) {
+ /* Impossible to insert this attribute into primary record. */
+ err = -EINVAL;
+ goto out;
+ }
+
+ /* Start real attribute moving. */
+ attr = NULL;
+
+ for (;;) {
+ attr = mi_enum_attr(&ni->mi, attr);
+ if (!attr) {
+ /* We should never be here 'cause we have already check this case. */
+ err = -EINVAL;
+ goto out;
+ }
+
+ /* Skip attributes that MUST be primary record. */
+ if (attr->type == ATTR_STD || attr->type == ATTR_LIST)
+ continue;
+
+ le = NULL;
+ if (ni->attr_list.size) {
+ le = al_find_le(ni, NULL, attr);
+ if (!le) {
+ /* Really this is a serious bug. */
+ err = -EINVAL;
+ goto out;
+ }
+ }
+
+ t32 = le32_to_cpu(attr->size);
+ t16 = le16_to_cpu(attr->name_off);
+ err = ni_ins_attr_ext(ni, le, attr->type, Add2Ptr(attr, t16),
+ attr->name_len, t32, attr_svcn(attr), t16,
+ false, &eattr, NULL, NULL);
+ if (err)
+ return err;
+
+ id = eattr->id;
+ memcpy(eattr, attr, t32);
+ eattr->id = id;
+
+ /* Remove from primary record. */
+ mi_remove_attr(NULL, &ni->mi, attr);
+
+ /* attr now points to next attribute. */
+ if (attr->type == ATTR_END)
+ goto out;
+ }
+ while (asize + list_reserve > sbi->record_size - le32_to_cpu(rec->used))
+ ;
+
+ attr = ni_ins_new_attr(ni, &ni->mi, NULL, type, name, name_len, asize,
+ name_off, svcn, ins_le);
+ if (!attr) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (IS_ERR(attr)) {
+ err = PTR_ERR(attr);
+ goto out;
+ }
+
+ if (ins_attr)
+ *ins_attr = attr;
+ if (ins_mi)
+ *ins_mi = &ni->mi;
+
+out:
+ return err;
+}
+
+/* ni_expand_mft_list - Split ATTR_DATA of $MFT. */
+static int ni_expand_mft_list(struct ntfs_inode *ni)
+{
+ int err = 0;
+ struct runs_tree *run = &ni->file.run;
+ u32 asize, run_size, done = 0;
+ struct ATTRIB *attr;
+ struct rb_node *node;
+ CLST mft_min, mft_new, svcn, evcn, plen;
+ struct mft_inode *mi, *mi_min, *mi_new;
+ struct ntfs_sb_info *sbi = ni->mi.sbi;
+
+ /* Find the nearest MFT. */
+ mft_min = 0;
+ mft_new = 0;
+ mi_min = NULL;
+
+ for (node = rb_first(&ni->mi_tree); node; node = rb_next(node)) {
+ mi = rb_entry(node, struct mft_inode, node);
+
+ attr = mi_enum_attr(mi, NULL);
+
+ if (!attr) {
+ mft_min = mi->rno;
+ mi_min = mi;
+ break;
+ }
+ }
+
+ if (ntfs_look_free_mft(sbi, &mft_new, true, ni, &mi_new)) {
+ mft_new = 0;
+ /* Really this is not critical. */
+ } else if (mft_min > mft_new) {
+ mft_min = mft_new;
+ mi_min = mi_new;
+ } else {
+ ntfs_mark_rec_free(sbi, mft_new, true);
+ mft_new = 0;
+ ni_remove_mi(ni, mi_new);
+ }
+
+ attr = mi_find_attr(&ni->mi, NULL, ATTR_DATA, NULL, 0, NULL);
+ if (!attr) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ asize = le32_to_cpu(attr->size);
+
+ evcn = le64_to_cpu(attr->nres.evcn);
+ svcn = bytes_to_cluster(sbi, (u64)(mft_min + 1) << sbi->record_bits);
+ if (evcn + 1 >= svcn) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ /*
+ * Split primary attribute [0 evcn] in two parts [0 svcn) + [svcn evcn].
+ *
+ * Update first part of ATTR_DATA in 'primary MFT.
+ */
+ err = run_pack(run, 0, svcn, Add2Ptr(attr, SIZEOF_NONRESIDENT),
+ asize - SIZEOF_NONRESIDENT, &plen);
+ if (err < 0)
+ goto out;
+
+ run_size = ALIGN(err, 8);
+ err = 0;
+
+ if (plen < svcn) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ attr->nres.evcn = cpu_to_le64(svcn - 1);
+ attr->size = cpu_to_le32(run_size + SIZEOF_NONRESIDENT);
+ /* 'done' - How many bytes of primary MFT becomes free. */
+ done = asize - run_size - SIZEOF_NONRESIDENT;
+ le32_sub_cpu(&ni->mi.mrec->used, done);
+
+ /* Estimate packed size (run_buf=NULL). */
+ err = run_pack(run, svcn, evcn + 1 - svcn, NULL, sbi->record_size,
+ &plen);
+ if (err < 0)
+ goto out;
+
+ run_size = ALIGN(err, 8);
+ err = 0;
+
+ if (plen < evcn + 1 - svcn) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ /*
+ * This function may implicitly call expand attr_list.
+ * Insert second part of ATTR_DATA in 'mi_min'.
+ */
+ attr = ni_ins_new_attr(ni, mi_min, NULL, ATTR_DATA, NULL, 0,
+ SIZEOF_NONRESIDENT + run_size,
+ SIZEOF_NONRESIDENT, svcn, NULL);
+ if (!attr) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (IS_ERR(attr)) {
+ err = PTR_ERR(attr);
+ goto out;
+ }
+
+ attr->non_res = 1;
+ attr->name_off = SIZEOF_NONRESIDENT_LE;
+ attr->flags = 0;
+
+ /* This function can't fail - cause already checked above. */
+ run_pack(run, svcn, evcn + 1 - svcn, Add2Ptr(attr, SIZEOF_NONRESIDENT),
+ run_size, &plen);
+
+ attr->nres.svcn = cpu_to_le64(svcn);
+ attr->nres.evcn = cpu_to_le64(evcn);
+ attr->nres.run_off = cpu_to_le16(SIZEOF_NONRESIDENT);
+
+out:
+ if (mft_new) {
+ ntfs_mark_rec_free(sbi, mft_new, true);
+ ni_remove_mi(ni, mi_new);
+ }
+
+ return !err && !done ? -EOPNOTSUPP : err;
+}
+
+/*
+ * ni_expand_list - Move all possible attributes out of primary record.
+ */
+int ni_expand_list(struct ntfs_inode *ni)
+{
+ int err = 0;
+ u32 asize, done = 0;
+ struct ATTRIB *attr, *ins_attr;
+ struct ATTR_LIST_ENTRY *le;
+ bool is_mft = ni->mi.rno == MFT_REC_MFT;
+ struct MFT_REF ref;
+
+ mi_get_ref(&ni->mi, &ref);
+ le = NULL;
+
+ while ((le = al_enumerate(ni, le))) {
+ if (le->type == ATTR_STD)
+ continue;
+
+ if (memcmp(&ref, &le->ref, sizeof(struct MFT_REF)))
+ continue;
+
+ if (is_mft && le->type == ATTR_DATA)
+ continue;
+
+ /* Find attribute in primary record. */
+ attr = rec_find_attr_le(&ni->mi, le);
+ if (!attr) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ asize = le32_to_cpu(attr->size);
+
+ /* Always insert into new record to avoid collisions (deep recursive). */
+ err = ni_ins_attr_ext(ni, le, attr->type, attr_name(attr),
+ attr->name_len, asize, attr_svcn(attr),
+ le16_to_cpu(attr->name_off), true,
+ &ins_attr, NULL, NULL);
+
+ if (err)
+ goto out;
+
+ memcpy(ins_attr, attr, asize);
+ ins_attr->id = le->id;
+ /* Remove from primary record. */
+ mi_remove_attr(NULL, &ni->mi, attr);
+
+ done += asize;
+ goto out;
+ }
+
+ if (!is_mft) {
+ err = -EFBIG; /* Attr list is too big(?) */
+ goto out;
+ }
+
+ /* Split MFT data as much as possible. */
+ err = ni_expand_mft_list(ni);
+
+out:
+ return !err && !done ? -EOPNOTSUPP : err;
+}
+
+/*
+ * ni_insert_nonresident - Insert new nonresident attribute.
+ */
+int ni_insert_nonresident(struct ntfs_inode *ni, enum ATTR_TYPE type,
+ const __le16 *name, u8 name_len,
+ const struct runs_tree *run, CLST svcn, CLST len,
+ __le16 flags, struct ATTRIB **new_attr,
+ struct mft_inode **mi, struct ATTR_LIST_ENTRY **le)
+{
+ int err;
+ CLST plen;
+ struct ATTRIB *attr;
+ bool is_ext =
+ (flags & (ATTR_FLAG_SPARSED | ATTR_FLAG_COMPRESSED)) && !svcn;
+ u32 name_size = ALIGN(name_len * sizeof(short), 8);
+ u32 name_off = is_ext ? SIZEOF_NONRESIDENT_EX : SIZEOF_NONRESIDENT;
+ u32 run_off = name_off + name_size;
+ u32 run_size, asize;
+ struct ntfs_sb_info *sbi = ni->mi.sbi;
+
+ /* Estimate packed size (run_buf=NULL). */
+ err = run_pack(run, svcn, len, NULL, sbi->max_bytes_per_attr - run_off,
+ &plen);
+ if (err < 0)
+ goto out;
+
+ run_size = ALIGN(err, 8);
+
+ if (plen < len) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ asize = run_off + run_size;
+
+ if (asize > sbi->max_bytes_per_attr) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ err = ni_insert_attr(ni, type, name, name_len, asize, name_off, svcn,
+ &attr, mi, le);
+
+ if (err)
+ goto out;
+
+ attr->non_res = 1;
+ attr->name_off = cpu_to_le16(name_off);
+ attr->flags = flags;
+
+ /* This function can't fail - cause already checked above. */
+ run_pack(run, svcn, len, Add2Ptr(attr, run_off), run_size, &plen);
+
+ attr->nres.svcn = cpu_to_le64(svcn);
+ attr->nres.evcn = cpu_to_le64((u64)svcn + len - 1);
+
+ if (new_attr)
+ *new_attr = attr;
+
+ *(__le64 *)&attr->nres.run_off = cpu_to_le64(run_off);
+
+ attr->nres.alloc_size =
+ svcn ? 0 : cpu_to_le64((u64)len << ni->mi.sbi->cluster_bits);
+ attr->nres.data_size = attr->nres.alloc_size;
+ attr->nres.valid_size = attr->nres.alloc_size;
+
+ if (is_ext) {
+ if (flags & ATTR_FLAG_COMPRESSED)
+ attr->nres.c_unit = COMPRESSION_UNIT;
+ attr->nres.total_size = attr->nres.alloc_size;
+ }
+
+out:
+ return err;
+}
+
+/*
+ * ni_insert_resident - Inserts new resident attribute.
+ */
+int ni_insert_resident(struct ntfs_inode *ni, u32 data_size,
+ enum ATTR_TYPE type, const __le16 *name, u8 name_len,
+ struct ATTRIB **new_attr, struct mft_inode **mi,
+ struct ATTR_LIST_ENTRY **le)
+{
+ int err;
+ u32 name_size = ALIGN(name_len * sizeof(short), 8);
+ u32 asize = SIZEOF_RESIDENT + name_size + ALIGN(data_size, 8);
+ struct ATTRIB *attr;
+
+ err = ni_insert_attr(ni, type, name, name_len, asize, SIZEOF_RESIDENT,
+ 0, &attr, mi, le);
+ if (err)
+ return err;
+
+ attr->non_res = 0;
+ attr->flags = 0;
+
+ attr->res.data_size = cpu_to_le32(data_size);
+ attr->res.data_off = cpu_to_le16(SIZEOF_RESIDENT + name_size);
+ if (type == ATTR_NAME) {
+ attr->res.flags = RESIDENT_FLAG_INDEXED;
+
+ /* is_attr_indexed(attr)) == true */
+ le16_add_cpu(&ni->mi.mrec->hard_links, 1);
+ ni->mi.dirty = true;
+ }
+ attr->res.res = 0;
+
+ if (new_attr)
+ *new_attr = attr;
+
+ return 0;
+}
+
+/*
+ * ni_remove_attr_le - Remove attribute from record.
+ */
+void ni_remove_attr_le(struct ntfs_inode *ni, struct ATTRIB *attr,
+ struct mft_inode *mi, struct ATTR_LIST_ENTRY *le)
+{
+ mi_remove_attr(ni, mi, attr);
+
+ if (le)
+ al_remove_le(ni, le);
+}
+
+/*
+ * ni_delete_all - Remove all attributes and frees allocates space.
+ *
+ * ntfs_evict_inode->ntfs_clear_inode->ni_delete_all (if no links).
+ */
+int ni_delete_all(struct ntfs_inode *ni)
+{
+ int err;
+ struct ATTR_LIST_ENTRY *le = NULL;
+ struct ATTRIB *attr = NULL;
+ struct rb_node *node;
+ u16 roff;
+ u32 asize;
+ CLST svcn, evcn;
+ struct ntfs_sb_info *sbi = ni->mi.sbi;
+ bool nt3 = is_ntfs3(sbi);
+ struct MFT_REF ref;
+
+ while ((attr = ni_enum_attr_ex(ni, attr, &le, NULL))) {
+ if (!nt3 || attr->name_len) {
+ ;
+ } else if (attr->type == ATTR_REPARSE) {
+ mi_get_ref(&ni->mi, &ref);
+ ntfs_remove_reparse(sbi, 0, &ref);
+ } else if (attr->type == ATTR_ID && !attr->non_res &&
+ le32_to_cpu(attr->res.data_size) >=
+ sizeof(struct GUID)) {
+ ntfs_objid_remove(sbi, resident_data(attr));
+ }
+
+ if (!attr->non_res)
+ continue;
+
+ svcn = le64_to_cpu(attr->nres.svcn);
+ evcn = le64_to_cpu(attr->nres.evcn);
+
+ if (evcn + 1 <= svcn)
+ continue;
+
+ asize = le32_to_cpu(attr->size);
+ roff = le16_to_cpu(attr->nres.run_off);
+
+ if (roff > asize)
+ return -EINVAL;
+
+ /* run==1 means unpack and deallocate. */
+ run_unpack_ex(RUN_DEALLOCATE, sbi, ni->mi.rno, svcn, evcn, svcn,
+ Add2Ptr(attr, roff), asize - roff);
+ }
+
+ if (ni->attr_list.size) {
+ run_deallocate(ni->mi.sbi, &ni->attr_list.run, true);
+ al_destroy(ni);
+ }
+
+ /* Free all subrecords. */
+ for (node = rb_first(&ni->mi_tree); node;) {
+ struct rb_node *next = rb_next(node);
+ struct mft_inode *mi = rb_entry(node, struct mft_inode, node);
+
+ clear_rec_inuse(mi->mrec);
+ mi->dirty = true;
+ mi_write(mi, 0);
+
+ ntfs_mark_rec_free(sbi, mi->rno, false);
+ ni_remove_mi(ni, mi);
+ mi_put(mi);
+ node = next;
+ }
+
+ /* Free base record. */
+ clear_rec_inuse(ni->mi.mrec);
+ ni->mi.dirty = true;
+ err = mi_write(&ni->mi, 0);
+
+ ntfs_mark_rec_free(sbi, ni->mi.rno, false);
+
+ return err;
+}
+
+/* ni_fname_name
+ *
+ * Return: File name attribute by its value.
+ */
+struct ATTR_FILE_NAME *ni_fname_name(struct ntfs_inode *ni,
+ const struct cpu_str *uni,
+ const struct MFT_REF *home_dir,
+ struct mft_inode **mi,
+ struct ATTR_LIST_ENTRY **le)
+{
+ struct ATTRIB *attr = NULL;
+ struct ATTR_FILE_NAME *fname;
+
+ if (le)
+ *le = NULL;
+
+ /* Enumerate all names. */
+next:
+ attr = ni_find_attr(ni, attr, le, ATTR_NAME, NULL, 0, NULL, mi);
+ if (!attr)
+ return NULL;
+
+ fname = resident_data_ex(attr, SIZEOF_ATTRIBUTE_FILENAME);
+ if (!fname)
+ goto next;
+
+ if (home_dir && memcmp(home_dir, &fname->home, sizeof(*home_dir)))
+ goto next;
+
+ if (!uni)
+ return fname;
+
+ if (uni->len != fname->name_len)
+ goto next;
+
+ if (ntfs_cmp_names_cpu(uni, (struct le_str *)&fname->name_len, NULL,
+ false))
+ goto next;
+
+ return fname;
+}
+
+/*
+ * ni_fname_type
+ *
+ * Return: File name attribute with given type.
+ */
+struct ATTR_FILE_NAME *ni_fname_type(struct ntfs_inode *ni, u8 name_type,
+ struct mft_inode **mi,
+ struct ATTR_LIST_ENTRY **le)
+{
+ struct ATTRIB *attr = NULL;
+ struct ATTR_FILE_NAME *fname;
+
+ *le = NULL;
+
+ if (name_type == FILE_NAME_POSIX)
+ return NULL;
+
+ /* Enumerate all names. */
+ for (;;) {
+ attr = ni_find_attr(ni, attr, le, ATTR_NAME, NULL, 0, NULL, mi);
+ if (!attr)
+ return NULL;
+
+ fname = resident_data_ex(attr, SIZEOF_ATTRIBUTE_FILENAME);
+ if (fname && name_type == fname->type)
+ return fname;
+ }
+}
+
+/*
+ * ni_new_attr_flags
+ *
+ * Process compressed/sparsed in special way.
+ * NOTE: You need to set ni->std_fa = new_fa
+ * after this function to keep internal structures in consistency.
+ */
+int ni_new_attr_flags(struct ntfs_inode *ni, enum FILE_ATTRIBUTE new_fa)
+{
+ struct ATTRIB *attr;
+ struct mft_inode *mi;
+ __le16 new_aflags;
+ u32 new_asize;
+
+ attr = ni_find_attr(ni, NULL, NULL, ATTR_DATA, NULL, 0, NULL, &mi);
+ if (!attr)
+ return -EINVAL;
+
+ new_aflags = attr->flags;
+
+ if (new_fa & FILE_ATTRIBUTE_SPARSE_FILE)
+ new_aflags |= ATTR_FLAG_SPARSED;
+ else
+ new_aflags &= ~ATTR_FLAG_SPARSED;
+
+ if (new_fa & FILE_ATTRIBUTE_COMPRESSED)
+ new_aflags |= ATTR_FLAG_COMPRESSED;
+ else
+ new_aflags &= ~ATTR_FLAG_COMPRESSED;
+
+ if (new_aflags == attr->flags)
+ return 0;
+
+ if ((new_aflags & (ATTR_FLAG_COMPRESSED | ATTR_FLAG_SPARSED)) ==
+ (ATTR_FLAG_COMPRESSED | ATTR_FLAG_SPARSED)) {
+ ntfs_inode_warn(&ni->vfs_inode,
+ "file can't be sparsed and compressed");
+ return -EOPNOTSUPP;
+ }
+
+ if (!attr->non_res)
+ goto out;
+
+ if (attr->nres.data_size) {
+ ntfs_inode_warn(
+ &ni->vfs_inode,
+ "one can change sparsed/compressed only for empty files");
+ return -EOPNOTSUPP;
+ }
+
+ /* Resize nonresident empty attribute in-place only. */
+ new_asize = (new_aflags & (ATTR_FLAG_COMPRESSED | ATTR_FLAG_SPARSED))
+ ? (SIZEOF_NONRESIDENT_EX + 8)
+ : (SIZEOF_NONRESIDENT + 8);
+
+ if (!mi_resize_attr(mi, attr, new_asize - le32_to_cpu(attr->size)))
+ return -EOPNOTSUPP;
+
+ if (new_aflags & ATTR_FLAG_SPARSED) {
+ attr->name_off = SIZEOF_NONRESIDENT_EX_LE;
+ /* Windows uses 16 clusters per frame but supports one cluster per frame too. */
+ attr->nres.c_unit = 0;
+ ni->vfs_inode.i_mapping->a_ops = &ntfs_aops;
+ } else if (new_aflags & ATTR_FLAG_COMPRESSED) {
+ attr->name_off = SIZEOF_NONRESIDENT_EX_LE;
+ /* The only allowed: 16 clusters per frame. */
+ attr->nres.c_unit = NTFS_LZNT_CUNIT;
+ ni->vfs_inode.i_mapping->a_ops = &ntfs_aops_cmpr;
+ } else {
+ attr->name_off = SIZEOF_NONRESIDENT_LE;
+ /* Normal files. */
+ attr->nres.c_unit = 0;
+ ni->vfs_inode.i_mapping->a_ops = &ntfs_aops;
+ }
+ attr->nres.run_off = attr->name_off;
+out:
+ attr->flags = new_aflags;
+ mi->dirty = true;
+
+ return 0;
+}
+
+/*
+ * ni_parse_reparse
+ *
+ * buffer - memory for reparse buffer header
+ */
+enum REPARSE_SIGN ni_parse_reparse(struct ntfs_inode *ni, struct ATTRIB *attr,
+ struct REPARSE_DATA_BUFFER *buffer)
+{
+ const struct REPARSE_DATA_BUFFER *rp = NULL;
+ u8 bits;
+ u16 len;
+ typeof(rp->CompressReparseBuffer) *cmpr;
+
+ /* Try to estimate reparse point. */
+ if (!attr->non_res) {
+ rp = resident_data_ex(attr, sizeof(struct REPARSE_DATA_BUFFER));
+ } else if (le64_to_cpu(attr->nres.data_size) >=
+ sizeof(struct REPARSE_DATA_BUFFER)) {
+ struct runs_tree run;
+
+ run_init(&run);
+
+ if (!attr_load_runs_vcn(ni, ATTR_REPARSE, NULL, 0, &run, 0) &&
+ !ntfs_read_run_nb(ni->mi.sbi, &run, 0, buffer,
+ sizeof(struct REPARSE_DATA_BUFFER),
+ NULL)) {
+ rp = buffer;
+ }
+
+ run_close(&run);
+ }
+
+ if (!rp)
+ return REPARSE_NONE;
+
+ len = le16_to_cpu(rp->ReparseDataLength);
+ switch (rp->ReparseTag) {
+ case (IO_REPARSE_TAG_MICROSOFT | IO_REPARSE_TAG_SYMBOLIC_LINK):
+ break; /* Symbolic link. */
+ case IO_REPARSE_TAG_MOUNT_POINT:
+ break; /* Mount points and junctions. */
+ case IO_REPARSE_TAG_SYMLINK:
+ break;
+ case IO_REPARSE_TAG_COMPRESS:
+ /*
+ * WOF - Windows Overlay Filter - Used to compress files with
+ * LZX/Xpress.
+ *
+ * Unlike native NTFS file compression, the Windows
+ * Overlay Filter supports only read operations. This means
+ * that it doesn't need to sector-align each compressed chunk,
+ * so the compressed data can be packed more tightly together.
+ * If you open the file for writing, the WOF just decompresses
+ * the entire file, turning it back into a plain file.
+ *
+ * Ntfs3 driver decompresses the entire file only on write or
+ * change size requests.
+ */
+
+ cmpr = &rp->CompressReparseBuffer;
+ if (len < sizeof(*cmpr) ||
+ cmpr->WofVersion != WOF_CURRENT_VERSION ||
+ cmpr->WofProvider != WOF_PROVIDER_SYSTEM ||
+ cmpr->ProviderVer != WOF_PROVIDER_CURRENT_VERSION) {
+ return REPARSE_NONE;
+ }
+
+ switch (cmpr->CompressionFormat) {
+ case WOF_COMPRESSION_XPRESS4K:
+ bits = 0xc; // 4k
+ break;
+ case WOF_COMPRESSION_XPRESS8K:
+ bits = 0xd; // 8k
+ break;
+ case WOF_COMPRESSION_XPRESS16K:
+ bits = 0xe; // 16k
+ break;
+ case WOF_COMPRESSION_LZX32K:
+ bits = 0xf; // 32k
+ break;
+ default:
+ bits = 0x10; // 64k
+ break;
+ }
+ ni_set_ext_compress_bits(ni, bits);
+ return REPARSE_COMPRESSED;
+
+ case IO_REPARSE_TAG_DEDUP:
+ ni->ni_flags |= NI_FLAG_DEDUPLICATED;
+ return REPARSE_DEDUPLICATED;
+
+ default:
+ if (rp->ReparseTag & IO_REPARSE_TAG_NAME_SURROGATE)
+ break;
+
+ return REPARSE_NONE;
+ }
+
+ if (buffer != rp)
+ memcpy(buffer, rp, sizeof(struct REPARSE_DATA_BUFFER));
+
+ /* Looks like normal symlink. */
+ return REPARSE_LINK;
+}
+
+/*
+ * ni_fiemap - Helper for file_fiemap().
+ *
+ * Assumed ni_lock.
+ * TODO: Less aggressive locks.
+ */
+int ni_fiemap(struct ntfs_inode *ni, struct fiemap_extent_info *fieinfo,
+ __u64 vbo, __u64 len)
+{
+ int err = 0;
+ struct ntfs_sb_info *sbi = ni->mi.sbi;
+ u8 cluster_bits = sbi->cluster_bits;
+ struct runs_tree *run;
+ struct rw_semaphore *run_lock;
+ struct ATTRIB *attr;
+ CLST vcn = vbo >> cluster_bits;
+ CLST lcn, clen;
+ u64 valid = ni->i_valid;
+ u64 lbo, bytes;
+ u64 end, alloc_size;
+ size_t idx = -1;
+ u32 flags;
+ bool ok;
+
+ if (S_ISDIR(ni->vfs_inode.i_mode)) {
+ run = &ni->dir.alloc_run;
+ attr = ni_find_attr(ni, NULL, NULL, ATTR_ALLOC, I30_NAME,
+ ARRAY_SIZE(I30_NAME), NULL, NULL);
+ run_lock = &ni->dir.run_lock;
+ } else {
+ run = &ni->file.run;
+ attr = ni_find_attr(ni, NULL, NULL, ATTR_DATA, NULL, 0, NULL,
+ NULL);
+ if (!attr) {
+ err = -EINVAL;
+ goto out;
+ }
+ if (is_attr_compressed(attr)) {
+ /* Unfortunately cp -r incorrectly treats compressed clusters. */
+ err = -EOPNOTSUPP;
+ ntfs_inode_warn(
+ &ni->vfs_inode,
+ "fiemap is not supported for compressed file (cp -r)");
+ goto out;
+ }
+ run_lock = &ni->file.run_lock;
+ }
+
+ if (!attr || !attr->non_res) {
+ err = fiemap_fill_next_extent(
+ fieinfo, 0, 0,
+ attr ? le32_to_cpu(attr->res.data_size) : 0,
+ FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_LAST |
+ FIEMAP_EXTENT_MERGED);
+ goto out;
+ }
+
+ end = vbo + len;
+ alloc_size = le64_to_cpu(attr->nres.alloc_size);
+ if (end > alloc_size)
+ end = alloc_size;
+
+ down_read(run_lock);
+
+ while (vbo < end) {
+ if (idx == -1) {
+ ok = run_lookup_entry(run, vcn, &lcn, &clen, &idx);
+ } else {
+ CLST vcn_next = vcn;
+
+ ok = run_get_entry(run, ++idx, &vcn, &lcn, &clen) &&
+ vcn == vcn_next;
+ if (!ok)
+ vcn = vcn_next;
+ }
+
+ if (!ok) {
+ up_read(run_lock);
+ down_write(run_lock);
+
+ err = attr_load_runs_vcn(ni, attr->type,
+ attr_name(attr),
+ attr->name_len, run, vcn);
+
+ up_write(run_lock);
+ down_read(run_lock);
+
+ if (err)
+ break;
+
+ ok = run_lookup_entry(run, vcn, &lcn, &clen, &idx);
+
+ if (!ok) {
+ err = -EINVAL;
+ break;
+ }
+ }
+
+ if (!clen) {
+ err = -EINVAL; // ?
+ break;
+ }
+
+ if (lcn == SPARSE_LCN) {
+ vcn += clen;
+ vbo = (u64)vcn << cluster_bits;
+ continue;
+ }
+
+ flags = FIEMAP_EXTENT_MERGED;
+ if (S_ISDIR(ni->vfs_inode.i_mode)) {
+ ;
+ } else if (is_attr_compressed(attr)) {
+ CLST clst_data;
+
+ err = attr_is_frame_compressed(
+ ni, attr, vcn >> attr->nres.c_unit, &clst_data);
+ if (err)
+ break;
+ if (clst_data < NTFS_LZNT_CLUSTERS)
+ flags |= FIEMAP_EXTENT_ENCODED;
+ } else if (is_attr_encrypted(attr)) {
+ flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
+ }
+
+ vbo = (u64)vcn << cluster_bits;
+ bytes = (u64)clen << cluster_bits;
+ lbo = (u64)lcn << cluster_bits;
+
+ vcn += clen;
+
+ if (vbo + bytes >= end)
+ bytes = end - vbo;
+
+ if (vbo + bytes <= valid) {
+ ;
+ } else if (vbo >= valid) {
+ flags |= FIEMAP_EXTENT_UNWRITTEN;
+ } else {
+ /* vbo < valid && valid < vbo + bytes */
+ u64 dlen = valid - vbo;
+
+ if (vbo + dlen >= end)
+ flags |= FIEMAP_EXTENT_LAST;
+
+ err = fiemap_fill_next_extent(fieinfo, vbo, lbo, dlen,
+ flags);
+ if (err < 0)
+ break;
+ if (err == 1) {
+ err = 0;
+ break;
+ }
+
+ vbo = valid;
+ bytes -= dlen;
+ if (!bytes)
+ continue;
+
+ lbo += dlen;
+ flags |= FIEMAP_EXTENT_UNWRITTEN;
+ }
+
+ if (vbo + bytes >= end)
+ flags |= FIEMAP_EXTENT_LAST;
+
+ err = fiemap_fill_next_extent(fieinfo, vbo, lbo, bytes, flags);
+ if (err < 0)
+ break;
+ if (err == 1) {
+ err = 0;
+ break;
+ }
+
+ vbo += bytes;
+ }
+
+ up_read(run_lock);
+
+out:
+ return err;
+}
+
+/*
+ * ni_readpage_cmpr
+ *
+ * When decompressing, we typically obtain more than one page per reference.
+ * We inject the additional pages into the page cache.
+ */
+int ni_readpage_cmpr(struct ntfs_inode *ni, struct page *page)
+{
+ int err;
+ struct ntfs_sb_info *sbi = ni->mi.sbi;
+ struct address_space *mapping = page->mapping;
+ pgoff_t index = page->index;
+ u64 frame_vbo, vbo = (u64)index << PAGE_SHIFT;
+ struct page **pages = NULL; /* Array of at most 16 pages. stack? */
+ u8 frame_bits;
+ CLST frame;
+ u32 i, idx, frame_size, pages_per_frame;
+ gfp_t gfp_mask;
+ struct page *pg;
+
+ if (vbo >= ni->vfs_inode.i_size) {
+ SetPageUptodate(page);
+ err = 0;
+ goto out;
+ }
+
+ if (ni->ni_flags & NI_FLAG_COMPRESSED_MASK) {
+ /* Xpress or LZX. */
+ frame_bits = ni_ext_compress_bits(ni);
+ } else {
+ /* LZNT compression. */
+ frame_bits = NTFS_LZNT_CUNIT + sbi->cluster_bits;
+ }
+ frame_size = 1u << frame_bits;
+ frame = vbo >> frame_bits;
+ frame_vbo = (u64)frame << frame_bits;
+ idx = (vbo - frame_vbo) >> PAGE_SHIFT;
+
+ pages_per_frame = frame_size >> PAGE_SHIFT;
+ pages = kcalloc(pages_per_frame, sizeof(struct page *), GFP_NOFS);
+ if (!pages) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ pages[idx] = page;
+ index = frame_vbo >> PAGE_SHIFT;
+ gfp_mask = mapping_gfp_mask(mapping);
+
+ for (i = 0; i < pages_per_frame; i++, index++) {
+ if (i == idx)
+ continue;
+
+ pg = find_or_create_page(mapping, index, gfp_mask);
+ if (!pg) {
+ err = -ENOMEM;
+ goto out1;
+ }
+ pages[i] = pg;
+ }
+
+ err = ni_read_frame(ni, frame_vbo, pages, pages_per_frame);
+
+out1:
+ if (err)
+ SetPageError(page);
+
+ for (i = 0; i < pages_per_frame; i++) {
+ pg = pages[i];
+ if (i == idx || !pg)
+ continue;
+ unlock_page(pg);
+ put_page(pg);
+ }
+
+out:
+ /* At this point, err contains 0 or -EIO depending on the "critical" page. */
+ kfree(pages);
+ unlock_page(page);
+
+ return err;
+}
+
+#ifdef CONFIG_NTFS3_LZX_XPRESS
+/*
+ * ni_decompress_file - Decompress LZX/Xpress compressed file.
+ *
+ * Remove ATTR_DATA::WofCompressedData.
+ * Remove ATTR_REPARSE.
+ */
+int ni_decompress_file(struct ntfs_inode *ni)
+{
+ struct ntfs_sb_info *sbi = ni->mi.sbi;
+ struct inode *inode = &ni->vfs_inode;
+ loff_t i_size = inode->i_size;
+ struct address_space *mapping = inode->i_mapping;
+ gfp_t gfp_mask = mapping_gfp_mask(mapping);
+ struct page **pages = NULL;
+ struct ATTR_LIST_ENTRY *le;
+ struct ATTRIB *attr;
+ CLST vcn, cend, lcn, clen, end;
+ pgoff_t index;
+ u64 vbo;
+ u8 frame_bits;
+ u32 i, frame_size, pages_per_frame, bytes;
+ struct mft_inode *mi;
+ int err;
+
+ /* Clusters for decompressed data. */
+ cend = bytes_to_cluster(sbi, i_size);
+
+ if (!i_size)
+ goto remove_wof;
+
+ /* Check in advance. */
+ if (cend > wnd_zeroes(&sbi->used.bitmap)) {
+ err = -ENOSPC;
+ goto out;
+ }
+
+ frame_bits = ni_ext_compress_bits(ni);
+ frame_size = 1u << frame_bits;
+ pages_per_frame = frame_size >> PAGE_SHIFT;
+ pages = kcalloc(pages_per_frame, sizeof(struct page *), GFP_NOFS);
+ if (!pages) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ /*
+ * Step 1: Decompress data and copy to new allocated clusters.
+ */
+ index = 0;
+ for (vbo = 0; vbo < i_size; vbo += bytes) {
+ u32 nr_pages;
+ bool new;
+
+ if (vbo + frame_size > i_size) {
+ bytes = i_size - vbo;
+ nr_pages = (bytes + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ } else {
+ nr_pages = pages_per_frame;
+ bytes = frame_size;
+ }
+
+ end = bytes_to_cluster(sbi, vbo + bytes);
+
+ for (vcn = vbo >> sbi->cluster_bits; vcn < end; vcn += clen) {
+ err = attr_data_get_block(ni, vcn, cend - vcn, &lcn,
+ &clen, &new);
+ if (err)
+ goto out;
+ }
+
+ for (i = 0; i < pages_per_frame; i++, index++) {
+ struct page *pg;
+
+ pg = find_or_create_page(mapping, index, gfp_mask);
+ if (!pg) {
+ while (i--) {
+ unlock_page(pages[i]);
+ put_page(pages[i]);
+ }
+ err = -ENOMEM;
+ goto out;
+ }
+ pages[i] = pg;
+ }
+
+ err = ni_read_frame(ni, vbo, pages, pages_per_frame);
+
+ if (!err) {
+ down_read(&ni->file.run_lock);
+ err = ntfs_bio_pages(sbi, &ni->file.run, pages,
+ nr_pages, vbo, bytes,
+ REQ_OP_WRITE);
+ up_read(&ni->file.run_lock);
+ }
+
+ for (i = 0; i < pages_per_frame; i++) {
+ unlock_page(pages[i]);
+ put_page(pages[i]);
+ }
+
+ if (err)
+ goto out;
+
+ cond_resched();
+ }
+
+remove_wof:
+ /*
+ * Step 2: Deallocate attributes ATTR_DATA::WofCompressedData
+ * and ATTR_REPARSE.
+ */
+ attr = NULL;
+ le = NULL;
+ while ((attr = ni_enum_attr_ex(ni, attr, &le, NULL))) {
+ CLST svcn, evcn;
+ u32 asize, roff;
+
+ if (attr->type == ATTR_REPARSE) {
+ struct MFT_REF ref;
+
+ mi_get_ref(&ni->mi, &ref);
+ ntfs_remove_reparse(sbi, 0, &ref);
+ }
+
+ if (!attr->non_res)
+ continue;
+
+ if (attr->type != ATTR_REPARSE &&
+ (attr->type != ATTR_DATA ||
+ attr->name_len != ARRAY_SIZE(WOF_NAME) ||
+ memcmp(attr_name(attr), WOF_NAME, sizeof(WOF_NAME))))
+ continue;
+
+ svcn = le64_to_cpu(attr->nres.svcn);
+ evcn = le64_to_cpu(attr->nres.evcn);
+
+ if (evcn + 1 <= svcn)
+ continue;
+
+ asize = le32_to_cpu(attr->size);
+ roff = le16_to_cpu(attr->nres.run_off);
+
+ if (roff > asize) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ /*run==1 Means unpack and deallocate. */
+ run_unpack_ex(RUN_DEALLOCATE, sbi, ni->mi.rno, svcn, evcn, svcn,
+ Add2Ptr(attr, roff), asize - roff);
+ }
+
+ /*
+ * Step 3: Remove attribute ATTR_DATA::WofCompressedData.
+ */
+ err = ni_remove_attr(ni, ATTR_DATA, WOF_NAME, ARRAY_SIZE(WOF_NAME),
+ false, NULL);
+ if (err)
+ goto out;
+
+ /*
+ * Step 4: Remove ATTR_REPARSE.
+ */
+ err = ni_remove_attr(ni, ATTR_REPARSE, NULL, 0, false, NULL);
+ if (err)
+ goto out;
+
+ /*
+ * Step 5: Remove sparse flag from data attribute.
+ */
+ attr = ni_find_attr(ni, NULL, NULL, ATTR_DATA, NULL, 0, NULL, &mi);
+ if (!attr) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (attr->non_res && is_attr_sparsed(attr)) {
+ /* Sparsed attribute header is 8 bytes bigger than normal. */
+ struct MFT_REC *rec = mi->mrec;
+ u32 used = le32_to_cpu(rec->used);
+ u32 asize = le32_to_cpu(attr->size);
+ u16 roff = le16_to_cpu(attr->nres.run_off);
+ char *rbuf = Add2Ptr(attr, roff);
+
+ memmove(rbuf - 8, rbuf, used - PtrOffset(rec, rbuf));
+ attr->size = cpu_to_le32(asize - 8);
+ attr->flags &= ~ATTR_FLAG_SPARSED;
+ attr->nres.run_off = cpu_to_le16(roff - 8);
+ attr->nres.c_unit = 0;
+ rec->used = cpu_to_le32(used - 8);
+ mi->dirty = true;
+ ni->std_fa &= ~(FILE_ATTRIBUTE_SPARSE_FILE |
+ FILE_ATTRIBUTE_REPARSE_POINT);
+
+ mark_inode_dirty(inode);
+ }
+
+ /* Clear cached flag. */
+ ni->ni_flags &= ~NI_FLAG_COMPRESSED_MASK;
+ if (ni->file.offs_page) {
+ put_page(ni->file.offs_page);
+ ni->file.offs_page = NULL;
+ }
+ mapping->a_ops = &ntfs_aops;
+
+out:
+ kfree(pages);
+ if (err)
+ _ntfs_bad_inode(inode);
+
+ return err;
+}
+
+/*
+ * decompress_lzx_xpress - External compression LZX/Xpress.
+ */
+static int decompress_lzx_xpress(struct ntfs_sb_info *sbi, const char *cmpr,
+ size_t cmpr_size, void *unc, size_t unc_size,
+ u32 frame_size)
+{
+ int err;
+ void *ctx;
+
+ if (cmpr_size == unc_size) {
+ /* Frame not compressed. */
+ memcpy(unc, cmpr, unc_size);
+ return 0;
+ }
+
+ err = 0;
+ if (frame_size == 0x8000) {
+ mutex_lock(&sbi->compress.mtx_lzx);
+ /* LZX: Frame compressed. */
+ ctx = sbi->compress.lzx;
+ if (!ctx) {
+ /* Lazy initialize LZX decompress context. */
+ ctx = lzx_allocate_decompressor();
+ if (!ctx) {
+ err = -ENOMEM;
+ goto out1;
+ }
+
+ sbi->compress.lzx = ctx;
+ }
+
+ if (lzx_decompress(ctx, cmpr, cmpr_size, unc, unc_size)) {
+ /* Treat all errors as "invalid argument". */
+ err = -EINVAL;
+ }
+out1:
+ mutex_unlock(&sbi->compress.mtx_lzx);
+ } else {
+ /* XPRESS: Frame compressed. */
+ mutex_lock(&sbi->compress.mtx_xpress);
+ ctx = sbi->compress.xpress;
+ if (!ctx) {
+ /* Lazy initialize Xpress decompress context. */
+ ctx = xpress_allocate_decompressor();
+ if (!ctx) {
+ err = -ENOMEM;
+ goto out2;
+ }
+
+ sbi->compress.xpress = ctx;
+ }
+
+ if (xpress_decompress(ctx, cmpr, cmpr_size, unc, unc_size)) {
+ /* Treat all errors as "invalid argument". */
+ err = -EINVAL;
+ }
+out2:
+ mutex_unlock(&sbi->compress.mtx_xpress);
+ }
+ return err;
+}
+#endif
+
+/*
+ * ni_read_frame
+ *
+ * Pages - Array of locked pages.
+ */
+int ni_read_frame(struct ntfs_inode *ni, u64 frame_vbo, struct page **pages,
+ u32 pages_per_frame)
+{
+ int err;
+ struct ntfs_sb_info *sbi = ni->mi.sbi;
+ u8 cluster_bits = sbi->cluster_bits;
+ char *frame_ondisk = NULL;
+ char *frame_mem = NULL;
+ struct page **pages_disk = NULL;
+ struct ATTR_LIST_ENTRY *le = NULL;
+ struct runs_tree *run = &ni->file.run;
+ u64 valid_size = ni->i_valid;
+ u64 vbo_disk;
+ size_t unc_size;
+ u32 frame_size, i, npages_disk, ondisk_size;
+ struct page *pg;
+ struct ATTRIB *attr;
+ CLST frame, clst_data;
+
+ /*
+ * To simplify decompress algorithm do vmap for source
+ * and target pages.
+ */
+ for (i = 0; i < pages_per_frame; i++)
+ kmap(pages[i]);
+
+ frame_size = pages_per_frame << PAGE_SHIFT;
+ frame_mem = vmap(pages, pages_per_frame, VM_MAP, PAGE_KERNEL);
+ if (!frame_mem) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ attr = ni_find_attr(ni, NULL, &le, ATTR_DATA, NULL, 0, NULL, NULL);
+ if (!attr) {
+ err = -ENOENT;
+ goto out1;
+ }
+
+ if (!attr->non_res) {
+ u32 data_size = le32_to_cpu(attr->res.data_size);
+
+ memset(frame_mem, 0, frame_size);
+ if (frame_vbo < data_size) {
+ ondisk_size = data_size - frame_vbo;
+ memcpy(frame_mem, resident_data(attr) + frame_vbo,
+ min(ondisk_size, frame_size));
+ }
+ err = 0;
+ goto out1;
+ }
+
+ if (frame_vbo >= valid_size) {
+ memset(frame_mem, 0, frame_size);
+ err = 0;
+ goto out1;
+ }
+
+ if (ni->ni_flags & NI_FLAG_COMPRESSED_MASK) {
+#ifndef CONFIG_NTFS3_LZX_XPRESS
+ err = -EOPNOTSUPP;
+ goto out1;
+#else
+ u32 frame_bits = ni_ext_compress_bits(ni);
+ u64 frame64 = frame_vbo >> frame_bits;
+ u64 frames, vbo_data;
+
+ if (frame_size != (1u << frame_bits)) {
+ err = -EINVAL;
+ goto out1;
+ }
+ switch (frame_size) {
+ case 0x1000:
+ case 0x2000:
+ case 0x4000:
+ case 0x8000:
+ break;
+ default:
+ /* Unknown compression. */
+ err = -EOPNOTSUPP;
+ goto out1;
+ }
+
+ attr = ni_find_attr(ni, attr, &le, ATTR_DATA, WOF_NAME,
+ ARRAY_SIZE(WOF_NAME), NULL, NULL);
+ if (!attr) {
+ ntfs_inode_err(
+ &ni->vfs_inode,
+ "external compressed file should contains data attribute \"WofCompressedData\"");
+ err = -EINVAL;
+ goto out1;
+ }
+
+ if (!attr->non_res) {
+ run = NULL;
+ } else {
+ run = run_alloc();
+ if (!run) {
+ err = -ENOMEM;
+ goto out1;
+ }
+ }
+
+ frames = (ni->vfs_inode.i_size - 1) >> frame_bits;
+
+ err = attr_wof_frame_info(ni, attr, run, frame64, frames,
+ frame_bits, &ondisk_size, &vbo_data);
+ if (err)
+ goto out2;
+
+ if (frame64 == frames) {
+ unc_size = 1 + ((ni->vfs_inode.i_size - 1) &
+ (frame_size - 1));
+ ondisk_size = attr_size(attr) - vbo_data;
+ } else {
+ unc_size = frame_size;
+ }
+
+ if (ondisk_size > frame_size) {
+ err = -EINVAL;
+ goto out2;
+ }
+
+ if (!attr->non_res) {
+ if (vbo_data + ondisk_size >
+ le32_to_cpu(attr->res.data_size)) {
+ err = -EINVAL;
+ goto out1;
+ }
+
+ err = decompress_lzx_xpress(
+ sbi, Add2Ptr(resident_data(attr), vbo_data),
+ ondisk_size, frame_mem, unc_size, frame_size);
+ goto out1;
+ }
+ vbo_disk = vbo_data;
+ /* Load all runs to read [vbo_disk-vbo_to). */
+ err = attr_load_runs_range(ni, ATTR_DATA, WOF_NAME,
+ ARRAY_SIZE(WOF_NAME), run, vbo_disk,
+ vbo_data + ondisk_size);
+ if (err)
+ goto out2;
+ npages_disk = (ondisk_size + (vbo_disk & (PAGE_SIZE - 1)) +
+ PAGE_SIZE - 1) >>
+ PAGE_SHIFT;
+#endif
+ } else if (is_attr_compressed(attr)) {
+ /* LZNT compression. */
+ if (sbi->cluster_size > NTFS_LZNT_MAX_CLUSTER) {
+ err = -EOPNOTSUPP;
+ goto out1;
+ }
+
+ if (attr->nres.c_unit != NTFS_LZNT_CUNIT) {
+ err = -EOPNOTSUPP;
+ goto out1;
+ }
+
+ down_write(&ni->file.run_lock);
+ run_truncate_around(run, le64_to_cpu(attr->nres.svcn));
+ frame = frame_vbo >> (cluster_bits + NTFS_LZNT_CUNIT);
+ err = attr_is_frame_compressed(ni, attr, frame, &clst_data);
+ up_write(&ni->file.run_lock);
+ if (err)
+ goto out1;
+
+ if (!clst_data) {
+ memset(frame_mem, 0, frame_size);
+ goto out1;
+ }
+
+ frame_size = sbi->cluster_size << NTFS_LZNT_CUNIT;
+ ondisk_size = clst_data << cluster_bits;
+
+ if (clst_data >= NTFS_LZNT_CLUSTERS) {
+ /* Frame is not compressed. */
+ down_read(&ni->file.run_lock);
+ err = ntfs_bio_pages(sbi, run, pages, pages_per_frame,
+ frame_vbo, ondisk_size,
+ REQ_OP_READ);
+ up_read(&ni->file.run_lock);
+ goto out1;
+ }
+ vbo_disk = frame_vbo;
+ npages_disk = (ondisk_size + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ } else {
+ __builtin_unreachable();
+ err = -EINVAL;
+ goto out1;
+ }
+
+ pages_disk = kzalloc(npages_disk * sizeof(struct page *), GFP_NOFS);
+ if (!pages_disk) {
+ err = -ENOMEM;
+ goto out2;
+ }
+
+ for (i = 0; i < npages_disk; i++) {
+ pg = alloc_page(GFP_KERNEL);
+ if (!pg) {
+ err = -ENOMEM;
+ goto out3;
+ }
+ pages_disk[i] = pg;
+ lock_page(pg);
+ kmap(pg);
+ }
+
+ /* Read 'ondisk_size' bytes from disk. */
+ down_read(&ni->file.run_lock);
+ err = ntfs_bio_pages(sbi, run, pages_disk, npages_disk, vbo_disk,
+ ondisk_size, REQ_OP_READ);
+ up_read(&ni->file.run_lock);
+ if (err)
+ goto out3;
+
+ /*
+ * To simplify decompress algorithm do vmap for source and target pages.
+ */
+ frame_ondisk = vmap(pages_disk, npages_disk, VM_MAP, PAGE_KERNEL_RO);
+ if (!frame_ondisk) {
+ err = -ENOMEM;
+ goto out3;
+ }
+
+ /* Decompress: Frame_ondisk -> frame_mem. */
+#ifdef CONFIG_NTFS3_LZX_XPRESS
+ if (run != &ni->file.run) {
+ /* LZX or XPRESS */
+ err = decompress_lzx_xpress(
+ sbi, frame_ondisk + (vbo_disk & (PAGE_SIZE - 1)),
+ ondisk_size, frame_mem, unc_size, frame_size);
+ } else
+#endif
+ {
+ /* LZNT - Native NTFS compression. */
+ unc_size = decompress_lznt(frame_ondisk, ondisk_size, frame_mem,
+ frame_size);
+ if ((ssize_t)unc_size < 0)
+ err = unc_size;
+ else if (!unc_size || unc_size > frame_size)
+ err = -EINVAL;
+ }
+ if (!err && valid_size < frame_vbo + frame_size) {
+ size_t ok = valid_size - frame_vbo;
+
+ memset(frame_mem + ok, 0, frame_size - ok);
+ }
+
+ vunmap(frame_ondisk);
+
+out3:
+ for (i = 0; i < npages_disk; i++) {
+ pg = pages_disk[i];
+ if (pg) {
+ kunmap(pg);
+ unlock_page(pg);
+ put_page(pg);
+ }
+ }
+ kfree(pages_disk);
+
+out2:
+#ifdef CONFIG_NTFS3_LZX_XPRESS
+ if (run != &ni->file.run)
+ run_free(run);
+#endif
+out1:
+ vunmap(frame_mem);
+out:
+ for (i = 0; i < pages_per_frame; i++) {
+ pg = pages[i];
+ kunmap(pg);
+ ClearPageError(pg);
+ SetPageUptodate(pg);
+ }
+
+ return err;
+}
+
+/*
+ * ni_write_frame
+ *
+ * Pages - Array of locked pages.
+ */
+int ni_write_frame(struct ntfs_inode *ni, struct page **pages,
+ u32 pages_per_frame)
+{
+ int err;
+ struct ntfs_sb_info *sbi = ni->mi.sbi;
+ u8 frame_bits = NTFS_LZNT_CUNIT + sbi->cluster_bits;
+ u32 frame_size = sbi->cluster_size << NTFS_LZNT_CUNIT;
+ u64 frame_vbo = (u64)pages[0]->index << PAGE_SHIFT;
+ CLST frame = frame_vbo >> frame_bits;
+ char *frame_ondisk = NULL;
+ struct page **pages_disk = NULL;
+ struct ATTR_LIST_ENTRY *le = NULL;
+ char *frame_mem;
+ struct ATTRIB *attr;
+ struct mft_inode *mi;
+ u32 i;
+ struct page *pg;
+ size_t compr_size, ondisk_size;
+ struct lznt *lznt;
+
+ attr = ni_find_attr(ni, NULL, &le, ATTR_DATA, NULL, 0, NULL, &mi);
+ if (!attr) {
+ err = -ENOENT;
+ goto out;
+ }
+
+ if (WARN_ON(!is_attr_compressed(attr))) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (sbi->cluster_size > NTFS_LZNT_MAX_CLUSTER) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ if (!attr->non_res) {
+ down_write(&ni->file.run_lock);
+ err = attr_make_nonresident(ni, attr, le, mi,
+ le32_to_cpu(attr->res.data_size),
+ &ni->file.run, &attr, pages[0]);
+ up_write(&ni->file.run_lock);
+ if (err)
+ goto out;
+ }
+
+ if (attr->nres.c_unit != NTFS_LZNT_CUNIT) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ pages_disk = kcalloc(pages_per_frame, sizeof(struct page *), GFP_NOFS);
+ if (!pages_disk) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ for (i = 0; i < pages_per_frame; i++) {
+ pg = alloc_page(GFP_KERNEL);
+ if (!pg) {
+ err = -ENOMEM;
+ goto out1;
+ }
+ pages_disk[i] = pg;
+ lock_page(pg);
+ kmap(pg);
+ }
+
+ /* To simplify compress algorithm do vmap for source and target pages. */
+ frame_ondisk = vmap(pages_disk, pages_per_frame, VM_MAP, PAGE_KERNEL);
+ if (!frame_ondisk) {
+ err = -ENOMEM;
+ goto out1;
+ }
+
+ for (i = 0; i < pages_per_frame; i++)
+ kmap(pages[i]);
+
+ /* Map in-memory frame for read-only. */
+ frame_mem = vmap(pages, pages_per_frame, VM_MAP, PAGE_KERNEL_RO);
+ if (!frame_mem) {
+ err = -ENOMEM;
+ goto out2;
+ }
+
+ mutex_lock(&sbi->compress.mtx_lznt);
+ lznt = NULL;
+ if (!sbi->compress.lznt) {
+ /*
+ * LZNT implements two levels of compression:
+ * 0 - Standard compression
+ * 1 - Best compression, requires a lot of cpu
+ * use mount option?
+ */
+ lznt = get_lznt_ctx(0);
+ if (!lznt) {
+ mutex_unlock(&sbi->compress.mtx_lznt);
+ err = -ENOMEM;
+ goto out3;
+ }
+
+ sbi->compress.lznt = lznt;
+ lznt = NULL;
+ }
+
+ /* Compress: frame_mem -> frame_ondisk */
+ compr_size = compress_lznt(frame_mem, frame_size, frame_ondisk,
+ frame_size, sbi->compress.lznt);
+ mutex_unlock(&sbi->compress.mtx_lznt);
+ kfree(lznt);
+
+ if (compr_size + sbi->cluster_size > frame_size) {
+ /* Frame is not compressed. */
+ compr_size = frame_size;
+ ondisk_size = frame_size;
+ } else if (compr_size) {
+ /* Frame is compressed. */
+ ondisk_size = ntfs_up_cluster(sbi, compr_size);
+ memset(frame_ondisk + compr_size, 0, ondisk_size - compr_size);
+ } else {
+ /* Frame is sparsed. */
+ ondisk_size = 0;
+ }
+
+ down_write(&ni->file.run_lock);
+ run_truncate_around(&ni->file.run, le64_to_cpu(attr->nres.svcn));
+ err = attr_allocate_frame(ni, frame, compr_size, ni->i_valid);
+ up_write(&ni->file.run_lock);
+ if (err)
+ goto out2;
+
+ if (!ondisk_size)
+ goto out2;
+
+ down_read(&ni->file.run_lock);
+ err = ntfs_bio_pages(sbi, &ni->file.run,
+ ondisk_size < frame_size ? pages_disk : pages,
+ pages_per_frame, frame_vbo, ondisk_size,
+ REQ_OP_WRITE);
+ up_read(&ni->file.run_lock);
+
+out3:
+ vunmap(frame_mem);
+
+out2:
+ for (i = 0; i < pages_per_frame; i++)
+ kunmap(pages[i]);
+
+ vunmap(frame_ondisk);
+out1:
+ for (i = 0; i < pages_per_frame; i++) {
+ pg = pages_disk[i];
+ if (pg) {
+ kunmap(pg);
+ unlock_page(pg);
+ put_page(pg);
+ }
+ }
+ kfree(pages_disk);
+out:
+ return err;
+}
+
+/*
+ * ni_remove_name - Removes name 'de' from MFT and from directory.
+ * 'de2' and 'undo_step' are used to restore MFT/dir, if error occurs.
+ */
+int ni_remove_name(struct ntfs_inode *dir_ni, struct ntfs_inode *ni,
+ struct NTFS_DE *de, struct NTFS_DE **de2, int *undo_step)
+{
+ int err;
+ struct ntfs_sb_info *sbi = ni->mi.sbi;
+ struct ATTR_FILE_NAME *de_name = (struct ATTR_FILE_NAME *)(de + 1);
+ struct ATTR_FILE_NAME *fname;
+ struct ATTR_LIST_ENTRY *le;
+ struct mft_inode *mi;
+ u16 de_key_size = le16_to_cpu(de->key_size);
+ u8 name_type;
+
+ *undo_step = 0;
+
+ /* Find name in record. */
+ mi_get_ref(&dir_ni->mi, &de_name->home);
+
+ fname = ni_fname_name(ni, (struct cpu_str *)&de_name->name_len,
+ &de_name->home, &mi, &le);
+ if (!fname)
+ return -ENOENT;
+
+ memcpy(&de_name->dup, &fname->dup, sizeof(struct NTFS_DUP_INFO));
+ name_type = paired_name(fname->type);
+
+ /* Mark ntfs as dirty. It will be cleared at umount. */
+ ntfs_set_state(sbi, NTFS_DIRTY_DIRTY);
+
+ /* Step 1: Remove name from directory. */
+ err = indx_delete_entry(&dir_ni->dir, dir_ni, fname, de_key_size, sbi);
+ if (err)
+ return err;
+
+ /* Step 2: Remove name from MFT. */
+ ni_remove_attr_le(ni, attr_from_name(fname), mi, le);
+
+ *undo_step = 2;
+
+ /* Get paired name. */
+ fname = ni_fname_type(ni, name_type, &mi, &le);
+ if (fname) {
+ u16 de2_key_size = fname_full_size(fname);
+
+ *de2 = Add2Ptr(de, 1024);
+ (*de2)->key_size = cpu_to_le16(de2_key_size);
+
+ memcpy(*de2 + 1, fname, de2_key_size);
+
+ /* Step 3: Remove paired name from directory. */
+ err = indx_delete_entry(&dir_ni->dir, dir_ni, fname,
+ de2_key_size, sbi);
+ if (err)
+ return err;
+
+ /* Step 4: Remove paired name from MFT. */
+ ni_remove_attr_le(ni, attr_from_name(fname), mi, le);
+
+ *undo_step = 4;
+ }
+ return 0;
+}
+
+/*
+ * ni_remove_name_undo - Paired function for ni_remove_name.
+ *
+ * Return: True if ok
+ */
+bool ni_remove_name_undo(struct ntfs_inode *dir_ni, struct ntfs_inode *ni,
+ struct NTFS_DE *de, struct NTFS_DE *de2, int undo_step)
+{
+ struct ntfs_sb_info *sbi = ni->mi.sbi;
+ struct ATTRIB *attr;
+ u16 de_key_size = de2 ? le16_to_cpu(de2->key_size) : 0;
+
+ switch (undo_step) {
+ case 4:
+ if (ni_insert_resident(ni, de_key_size, ATTR_NAME, NULL, 0,
+ &attr, NULL, NULL)) {
+ return false;
+ }
+ memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), de2 + 1, de_key_size);
+
+ mi_get_ref(&ni->mi, &de2->ref);
+ de2->size = cpu_to_le16(ALIGN(de_key_size, 8) +
+ sizeof(struct NTFS_DE));
+ de2->flags = 0;
+ de2->res = 0;
+
+ if (indx_insert_entry(&dir_ni->dir, dir_ni, de2, sbi, NULL,
+ 1)) {
+ return false;
+ }
+ fallthrough;
+
+ case 2:
+ de_key_size = le16_to_cpu(de->key_size);
+
+ if (ni_insert_resident(ni, de_key_size, ATTR_NAME, NULL, 0,
+ &attr, NULL, NULL)) {
+ return false;
+ }
+
+ memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), de + 1, de_key_size);
+ mi_get_ref(&ni->mi, &de->ref);
+
+ if (indx_insert_entry(&dir_ni->dir, dir_ni, de, sbi, NULL, 1))
+ return false;
+ }
+
+ return true;
+}
+
+/*
+ * ni_add_name - Add new name into MFT and into directory.
+ */
+int ni_add_name(struct ntfs_inode *dir_ni, struct ntfs_inode *ni,
+ struct NTFS_DE *de)
+{
+ int err;
+ struct ATTRIB *attr;
+ struct ATTR_LIST_ENTRY *le;
+ struct mft_inode *mi;
+ struct ATTR_FILE_NAME *fname;
+ struct ATTR_FILE_NAME *de_name = (struct ATTR_FILE_NAME *)(de + 1);
+ u16 de_key_size = le16_to_cpu(de->key_size);
+
+ mi_get_ref(&ni->mi, &de->ref);
+ mi_get_ref(&dir_ni->mi, &de_name->home);
+
+ /* Fill duplicate from any ATTR_NAME. */
+ fname = ni_fname_name(ni, NULL, NULL, NULL, NULL);
+ if (fname)
+ memcpy(&de_name->dup, &fname->dup, sizeof(fname->dup));
+ de_name->dup.fa = ni->std_fa;
+
+ /* Insert new name into MFT. */
+ err = ni_insert_resident(ni, de_key_size, ATTR_NAME, NULL, 0, &attr,
+ &mi, &le);
+ if (err)
+ return err;
+
+ memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), de_name, de_key_size);
+
+ /* Insert new name into directory. */
+ err = indx_insert_entry(&dir_ni->dir, dir_ni, de, ni->mi.sbi, NULL, 0);
+ if (err)
+ ni_remove_attr_le(ni, attr, mi, le);
+
+ return err;
+}
+
+/*
+ * ni_rename - Remove one name and insert new name.
+ */
+int ni_rename(struct ntfs_inode *dir_ni, struct ntfs_inode *new_dir_ni,
+ struct ntfs_inode *ni, struct NTFS_DE *de, struct NTFS_DE *new_de,
+ bool *is_bad)
+{
+ int err;
+ struct NTFS_DE *de2 = NULL;
+ int undo = 0;
+
+ /*
+ * There are two possible ways to rename:
+ * 1) Add new name and remove old name.
+ * 2) Remove old name and add new name.
+ *
+ * In most cases (not all!) adding new name into MFT and into directory can
+ * allocate additional cluster(s).
+ * Second way may result to bad inode if we can't add new name
+ * and then can't restore (add) old name.
+ */
+
+ /*
+ * Way 1 - Add new + remove old.
+ */
+ err = ni_add_name(new_dir_ni, ni, new_de);
+ if (!err) {
+ err = ni_remove_name(dir_ni, ni, de, &de2, &undo);
+ if (err && ni_remove_name(new_dir_ni, ni, new_de, &de2, &undo))
+ *is_bad = true;
+ }
+
+ /*
+ * Way 2 - Remove old + add new.
+ */
+ /*
+ * err = ni_remove_name(dir_ni, ni, de, &de2, &undo);
+ * if (!err) {
+ * err = ni_add_name(new_dir_ni, ni, new_de);
+ * if (err && !ni_remove_name_undo(dir_ni, ni, de, de2, undo))
+ * *is_bad = true;
+ * }
+ */
+
+ return err;
+}
+
+/*
+ * ni_is_dirty - Return: True if 'ni' requires ni_write_inode.
+ */
+bool ni_is_dirty(struct inode *inode)
+{
+ struct ntfs_inode *ni = ntfs_i(inode);
+ struct rb_node *node;
+
+ if (ni->mi.dirty || ni->attr_list.dirty ||
+ (ni->ni_flags & NI_FLAG_UPDATE_PARENT))
+ return true;
+
+ for (node = rb_first(&ni->mi_tree); node; node = rb_next(node)) {
+ if (rb_entry(node, struct mft_inode, node)->dirty)
+ return true;
+ }
+
+ return false;
+}
+
+/*
+ * ni_update_parent
+ *
+ * Update duplicate info of ATTR_FILE_NAME in MFT and in parent directories.
+ */
+static bool ni_update_parent(struct ntfs_inode *ni, struct NTFS_DUP_INFO *dup,
+ int sync)
+{
+ struct ATTRIB *attr;
+ struct mft_inode *mi;
+ struct ATTR_LIST_ENTRY *le = NULL;
+ struct ntfs_sb_info *sbi = ni->mi.sbi;
+ struct super_block *sb = sbi->sb;
+ bool re_dirty = false;
+
+ if (ni->mi.mrec->flags & RECORD_FLAG_DIR) {
+ dup->fa |= FILE_ATTRIBUTE_DIRECTORY;
+ attr = NULL;
+ dup->alloc_size = 0;
+ dup->data_size = 0;
+ } else {
+ dup->fa &= ~FILE_ATTRIBUTE_DIRECTORY;
+
+ attr = ni_find_attr(ni, NULL, &le, ATTR_DATA, NULL, 0, NULL,
+ &mi);
+ if (!attr) {
+ dup->alloc_size = dup->data_size = 0;
+ } else if (!attr->non_res) {
+ u32 data_size = le32_to_cpu(attr->res.data_size);
+
+ dup->alloc_size = cpu_to_le64(ALIGN(data_size, 8));
+ dup->data_size = cpu_to_le64(data_size);
+ } else {
+ u64 new_valid = ni->i_valid;
+ u64 data_size = le64_to_cpu(attr->nres.data_size);
+ __le64 valid_le;
+
+ dup->alloc_size = is_attr_ext(attr)
+ ? attr->nres.total_size
+ : attr->nres.alloc_size;
+ dup->data_size = attr->nres.data_size;
+
+ if (new_valid > data_size)
+ new_valid = data_size;
+
+ valid_le = cpu_to_le64(new_valid);
+ if (valid_le != attr->nres.valid_size) {
+ attr->nres.valid_size = valid_le;
+ mi->dirty = true;
+ }
+ }
+ }
+
+ /* TODO: Fill reparse info. */
+ dup->reparse = 0;
+ dup->ea_size = 0;
+
+ if (ni->ni_flags & NI_FLAG_EA) {
+ attr = ni_find_attr(ni, attr, &le, ATTR_EA_INFO, NULL, 0, NULL,
+ NULL);
+ if (attr) {
+ const struct EA_INFO *info;
+
+ info = resident_data_ex(attr, sizeof(struct EA_INFO));
+ /* If ATTR_EA_INFO exists 'info' can't be NULL. */
+ if (info)
+ dup->ea_size = info->size_pack;
+ }
+ }
+
+ attr = NULL;
+ le = NULL;
+
+ while ((attr = ni_find_attr(ni, attr, &le, ATTR_NAME, NULL, 0, NULL,
+ &mi))) {
+ struct inode *dir;
+ struct ATTR_FILE_NAME *fname;
+
+ fname = resident_data_ex(attr, SIZEOF_ATTRIBUTE_FILENAME);
+ if (!fname || !memcmp(&fname->dup, dup, sizeof(fname->dup)))
+ continue;
+
+ /* Check simple case when parent inode equals current inode. */
+ if (ino_get(&fname->home) == ni->vfs_inode.i_ino) {
+ ntfs_set_state(sbi, NTFS_DIRTY_ERROR);
+ continue;
+ }
+
+ /* ntfs_iget5 may sleep. */
+ dir = ntfs_iget5(sb, &fname->home, NULL);
+ if (IS_ERR(dir)) {
+ ntfs_inode_warn(
+ &ni->vfs_inode,
+ "failed to open parent directory r=%lx to update",
+ (long)ino_get(&fname->home));
+ continue;
+ }
+
+ if (!is_bad_inode(dir)) {
+ struct ntfs_inode *dir_ni = ntfs_i(dir);
+
+ if (!ni_trylock(dir_ni)) {
+ re_dirty = true;
+ } else {
+ indx_update_dup(dir_ni, sbi, fname, dup, sync);
+ ni_unlock(dir_ni);
+ memcpy(&fname->dup, dup, sizeof(fname->dup));
+ mi->dirty = true;
+ }
+ }
+ iput(dir);
+ }
+
+ return re_dirty;
+}
+
+/*
+ * ni_write_inode - Write MFT base record and all subrecords to disk.
+ */
+int ni_write_inode(struct inode *inode, int sync, const char *hint)
+{
+ int err = 0, err2;
+ struct ntfs_inode *ni = ntfs_i(inode);
+ struct super_block *sb = inode->i_sb;
+ struct ntfs_sb_info *sbi = sb->s_fs_info;
+ bool re_dirty = false;
+ struct ATTR_STD_INFO *std;
+ struct rb_node *node, *next;
+ struct NTFS_DUP_INFO dup;
+
+ if (is_bad_inode(inode) || sb_rdonly(sb))
+ return 0;
+
+ if (!ni_trylock(ni)) {
+ /* 'ni' is under modification, skip for now. */
+ mark_inode_dirty_sync(inode);
+ return 0;
+ }
+
+ if (is_rec_inuse(ni->mi.mrec) &&
+ !(sbi->flags & NTFS_FLAGS_LOG_REPLAYING) && inode->i_nlink) {
+ bool modified = false;
+
+ /* Update times in standard attribute. */
+ std = ni_std(ni);
+ if (!std) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ /* Update the access times if they have changed. */
+ dup.m_time = kernel2nt(&inode->i_mtime);
+ if (std->m_time != dup.m_time) {
+ std->m_time = dup.m_time;
+ modified = true;
+ }
+
+ dup.c_time = kernel2nt(&inode->i_ctime);
+ if (std->c_time != dup.c_time) {
+ std->c_time = dup.c_time;
+ modified = true;
+ }
+
+ dup.a_time = kernel2nt(&inode->i_atime);
+ if (std->a_time != dup.a_time) {
+ std->a_time = dup.a_time;
+ modified = true;
+ }
+
+ dup.fa = ni->std_fa;
+ if (std->fa != dup.fa) {
+ std->fa = dup.fa;
+ modified = true;
+ }
+
+ if (modified)
+ ni->mi.dirty = true;
+
+ if (!ntfs_is_meta_file(sbi, inode->i_ino) &&
+ (modified || (ni->ni_flags & NI_FLAG_UPDATE_PARENT))
+ /* Avoid __wait_on_freeing_inode(inode). */
+ && (sb->s_flags & SB_ACTIVE)) {
+ dup.cr_time = std->cr_time;
+ /* Not critical if this function fail. */
+ re_dirty = ni_update_parent(ni, &dup, sync);
+
+ if (re_dirty)
+ ni->ni_flags |= NI_FLAG_UPDATE_PARENT;
+ else
+ ni->ni_flags &= ~NI_FLAG_UPDATE_PARENT;
+ }
+
+ /* Update attribute list. */
+ if (ni->attr_list.size && ni->attr_list.dirty) {
+ if (inode->i_ino != MFT_REC_MFT || sync) {
+ err = ni_try_remove_attr_list(ni);
+ if (err)
+ goto out;
+ }
+
+ err = al_update(ni, sync);
+ if (err)
+ goto out;
+ }
+ }
+
+ for (node = rb_first(&ni->mi_tree); node; node = next) {
+ struct mft_inode *mi = rb_entry(node, struct mft_inode, node);
+ bool is_empty;
+
+ next = rb_next(node);
+
+ if (!mi->dirty)
+ continue;
+
+ is_empty = !mi_enum_attr(mi, NULL);
+
+ if (is_empty)
+ clear_rec_inuse(mi->mrec);
+
+ err2 = mi_write(mi, sync);
+ if (!err && err2)
+ err = err2;
+
+ if (is_empty) {
+ ntfs_mark_rec_free(sbi, mi->rno, false);
+ rb_erase(node, &ni->mi_tree);
+ mi_put(mi);
+ }
+ }
+
+ if (ni->mi.dirty) {
+ err2 = mi_write(&ni->mi, sync);
+ if (!err && err2)
+ err = err2;
+ }
+out:
+ ni_unlock(ni);
+
+ if (err) {
+ ntfs_err(sb, "%s r=%lx failed, %d.", hint, inode->i_ino, err);
+ ntfs_set_state(sbi, NTFS_DIRTY_ERROR);
+ return err;
+ }
+
+ if (re_dirty)
+ mark_inode_dirty_sync(inode);
+
+ return 0;
+}