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3314 lines (2780 loc) · 73.1 KB
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// 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, &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, &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 && ni->mi.mrec &&
is_rec_inuse(ni->mi.mrec) &&
!(ni->mi.sbi->flags & NTFS_FLAGS_LOG_REPLAYING))
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);
ntfs_sub_da(ni->mi.sbi, run_len(&ni->file.run_da));
run_close(&ni->file.run_da);
#ifdef CONFIG_NTFS3_LZX_XPRESS
if (ni->file.offs_folio) {
/* On-demand allocated page for offsets. */
folio_put(ni->file.offs_folio);
ni->file.offs_folio = 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) {
_ntfs_bad_inode(&ni->vfs_inode);
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, &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(ni, 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_bad_inode(&ni->vfs_inode);
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, &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(ni, mi2, le2);
}
/*
* 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_obj(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);
*mi = ni_ins_mi(ni, &ni->mi_tree, m->rno, &m->node);
if (*mi != m)
mi_put(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, u8 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, &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(ni, 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(ni, 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)
{
#if 1
return 0;
#else
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 enough 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;
#endif
}
/*
* 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, &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(ni, 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(ni, 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, &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(ni, 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;
kvfree(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 = kzalloc(al_aligned(rs), GFP_NOFS);
if (!le)
return -ENOMEM;
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, &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 out;
}
}
/* Allocate child MFT. */
err = ntfs_look_free_mft(sbi, &rno, is_mft, ni, &mi);
if (err)
goto out;
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(ni, mi, b->type, Add2Ptr(b, name_off),
b->name_len, asize, name_off);
if (!attr)
goto out;
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 out;
if (to_free <= asize)
break;
to_free -= asize;
if (!nb)
goto out;
}
attr = mi_insert_attr(ni, &ni->mi, ATTR_LIST, NULL, 0,
lsize + SIZEOF_RESIDENT, SIZEOF_RESIDENT);
if (!attr)
goto out;
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);
return 0;
out:
kvfree(ni->attr_list.le);
ni->attr_list.le = NULL;
ni->attr_list.size = 0;
return err;
}
/*
* 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(ni, 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(ni, 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(ni, 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;
}