int ntfsSync (ntfs_vd *vd, ntfs_inode *ni)
{
int res = 0;
// Sanity check
if (!vd) {
errno = ENODEV;
return -1;
}
// Sanity check
if (!ni) {
errno = ENOENT;
return -1;
}
// Lock
ntfsLock(vd);
// Sync the entry
res = ntfs_inode_sync(ni);
// Force the underlying device to sync
ntfs_device_sync(vd->dev);
// Unlock
ntfsUnlock(vd);
return res;
}
int ntfs_inode_close(ntfs_inode *ni)
{
int res;
#if CACHE_NIDATA_SIZE
BOOL dirty;
struct CACHED_NIDATA item;
if (ni) {
debug_double_inode(ni->mft_no,0);
/* do not cache system files : could lead to double entries */
if (ni->vol && ni->vol->nidata_cache
&& ((ni->mft_no == FILE_root)
|| ((ni->mft_no >= FILE_first_user)
&& !(ni->mrec->flags & MFT_RECORD_IS_4)))) {
/* If we have dirty metadata, write it out. */
dirty = NInoDirty(ni) || NInoAttrListDirty(ni);
if (dirty) {
res = ntfs_inode_sync(ni);
/* do a real close if sync failed */
if (res)
ntfs_inode_real_close(ni);
} else
res = 0;
if (!res) {
/* feed idata into cache */
item.inum = ni->mft_no;
item.ni = ni;
item.pathname = (const char*)NULL;
item.varsize = 0;
debug_cached_inode(ni);
ntfs_enter_cache(ni->vol->nidata_cache,
GENERIC(&item), idata_cache_compare);
}
} else {
/* cache not ready or system file, really close */
res = ntfs_inode_real_close(ni);
}
} else
res = 0;
#else
res = ntfs_inode_real_close(ni);
#endif
return (res);
}
bool ntfsSetVolumeName (const char *name, const char *volumeName)
{
ntfs_vd *vd = NULL;
ntfs_attr *na = NULL;
ntfschar *ulabel = NULL;
int ulabel_len;
// Sanity check
if (!name) {
errno = EINVAL;
return false;
}
// Get the devices volume descriptor
vd = ntfsGetVolume(name);
if (!vd) {
errno = ENODEV;
return false;
}
// Lock
ntfsLock(vd);
// Convert the new volume name to unicode
ulabel_len = ntfsLocalToUnicode(volumeName, &ulabel) * sizeof(ntfschar);
if (ulabel_len < 0) {
ntfsUnlock(vd);
errno = EINVAL;
return false;
}
// Check if the volume name attribute exists
na = ntfs_attr_open(vd->vol->vol_ni, AT_VOLUME_NAME, NULL, 0);
if (na) {
// It does, resize it to match the length of the new volume name
if (ntfs_attr_truncate(na, ulabel_len)) {
ntfs_free(ulabel);
ntfsUnlock(vd);
return false;
}
// Write the new volume name
if (ntfs_attr_pwrite(na, 0, ulabel_len, ulabel) != ulabel_len) {
ntfs_free(ulabel);
ntfsUnlock(vd);
return false;
}
} else {
// It doesn't, create it now
if (ntfs_attr_add(vd->vol->vol_ni, AT_VOLUME_NAME, NULL, 0, (u8*)ulabel, ulabel_len)) {
ntfs_free(ulabel);
ntfsUnlock(vd);
return false;
}
}
// Reset the volumes name cache (as it has now been changed)
vd->name[0] = '\0';
// Close the volume name attribute
if (na)
ntfs_attr_close(na);
// Sync the volume node
if (ntfs_inode_sync(vd->vol->vol_ni)) {
ntfs_free(ulabel);
ntfsUnlock(vd);
return false;
}
// Clean up
ntfs_free(ulabel);
// Unlock
ntfsUnlock(vd);
return true;
}
/**
* ntfs_inode_close - close an ntfs inode and free all associated memory
* @ni: ntfs inode to close
*
* Make sure the ntfs inode @ni is clean.
*
* If the ntfs inode @ni is a base inode, close all associated extent inodes,
* then deallocate all memory attached to it, and finally free the ntfs inode
* structure itself.
*
* If it is an extent inode, we disconnect it from its base inode before we
* destroy it.
*
* It is OK to pass NULL to this function, it is just noop in this case.
*
* Return 0 on success or -1 on error with errno set to the error code. On
* error, @ni has not been freed. The user should attempt to handle the error
* and call ntfs_inode_close() again. The following error codes are defined:
*
* EBUSY @ni and/or its attribute list runlist is/are dirty and the
* attempt to write it/them to disk failed.
* EINVAL @ni is invalid (probably it is an extent inode).
* EIO I/O error while trying to write inode to disk.
*/
int ntfs_inode_close(ntfs_inode *ni)
{
int ret = -1;
if (!ni)
return 0;
ntfs_log_enter("Entering for inode %lld\n", (long long)ni->mft_no);
/* If we have dirty metadata, write it out. */
if (NInoDirty(ni) || NInoAttrListDirty(ni)) {
if (ntfs_inode_sync(ni)) {
if (errno != EIO)
errno = EBUSY;
goto err;
}
}
/* Is this a base inode with mapped extent inodes? */
if (ni->nr_extents > 0) {
while (ni->nr_extents > 0) {
if (ntfs_inode_close(ni->extent_nis[0])) {
if (errno != EIO)
errno = EBUSY;
goto err;
}
}
} else if (ni->nr_extents == -1) {
ntfs_inode **tmp_nis;
ntfs_inode *base_ni;
s32 i;
/*
* If the inode is an extent inode, disconnect it from the
* base inode before destroying it.
*/
base_ni = ni->base_ni;
for (i = 0; i < base_ni->nr_extents; ++i) {
tmp_nis = base_ni->extent_nis;
if (tmp_nis[i] != ni)
continue;
/* Found it. Disconnect. */
memmove(tmp_nis + i, tmp_nis + i + 1,
(base_ni->nr_extents - i - 1) *
sizeof(ntfs_inode *));
/* Buffer should be for multiple of four extents. */
if ((--base_ni->nr_extents) & 3) {
i = -1;
break;
}
/*
* ElectricFence is unhappy with realloc(x,0) as free(x)
* thus we explicitly separate these two cases.
*/
if (base_ni->nr_extents) {
/* Resize the memory buffer. */
tmp_nis = realloc(tmp_nis, base_ni->nr_extents *
sizeof(ntfs_inode *));
/* Ignore errors, they don't really matter. */
if (tmp_nis)
base_ni->extent_nis = tmp_nis;
} else if (tmp_nis)
free(tmp_nis);
/* Allow for error checking. */
i = -1;
break;
}
/*
* We could successfully sync, so only log this error
* and try to sync other inode extents too.
*/
if (i != -1)
ntfs_log_error("Extent inode %lld was not found\n",
(long long)ni->mft_no);
}
__ntfs_inode_release(ni);
ret = 0;
err:
ntfs_log_leave("\n");
return ret;
}
/**
* change_label - change the current label on a device
* @dev: device to change the label on
* @mnt_flags: mount flags of the device or 0 if not mounted
* @mnt_point: mount point of the device or NULL
* @label: the new label
*
* Change the label on the device @dev to @label.
*/
static int change_label(ntfs_volume *vol, unsigned long mnt_flags, char *label, BOOL force)
{
ntfs_attr_search_ctx *ctx;
ntfschar *new_label = NULL;
ATTR_RECORD *a;
int label_len;
int result = 0;
//XXX significant?
if (mnt_flags & NTFS_MF_MOUNTED) {
/* If not the root fs or mounted read/write, refuse change. */
if (!(mnt_flags & NTFS_MF_ISROOT) ||
!(mnt_flags & NTFS_MF_READONLY)) {
if (!force) {
ntfs_log_error("Refusing to change label on "
"read-%s mounted device %s.\n",
mnt_flags & NTFS_MF_READONLY ?
"only" : "write", opts.device);
return 1;
}
}
}
ctx = ntfs_attr_get_search_ctx(vol->vol_ni, NULL);
if (!ctx) {
ntfs_log_perror("Failed to get attribute search context");
goto err_out;
}
if (ntfs_attr_lookup(AT_VOLUME_NAME, AT_UNNAMED, 0, 0, 0, NULL, 0,
ctx)) {
if (errno != ENOENT) {
ntfs_log_perror("Lookup of $VOLUME_NAME attribute failed");
goto err_out;
}
/* The volume name attribute does not exist. Need to add it. */
a = NULL;
} else {
a = ctx->attr;
if (a->non_resident) {
ntfs_log_error("Error: Attribute $VOLUME_NAME must be "
"resident.\n");
goto err_out;
}
}
label_len = ntfs_mbstoucs(label, &new_label, 0);
if (label_len == -1) {
ntfs_log_perror("Unable to convert label string to Unicode");
goto err_out;
}
label_len *= sizeof(ntfschar);
if (label_len > 0x100) {
ntfs_log_error("New label is too long. Maximum %u characters "
"allowed. Truncating excess characters.\n",
(unsigned)(0x100 / sizeof(ntfschar)));
label_len = 0x100;
new_label[label_len / sizeof(ntfschar)] = 0;
}
if (a) {
if (resize_resident_attribute_value(ctx->mrec, a, label_len)) {
ntfs_log_perror("Error resizing resident attribute");
goto err_out;
}
} else {
/* sizeof(resident attribute record header) == 24 */
int asize = (24 + label_len + 7) & ~7;
u32 biu = le32_to_cpu(ctx->mrec->bytes_in_use);
if (biu + asize > le32_to_cpu(ctx->mrec->bytes_allocated)) {
errno = ENOSPC;
ntfs_log_perror("Error adding resident attribute");
goto err_out;
}
a = ctx->attr;
memmove((u8*)a + asize, a, biu - ((u8*)a - (u8*)ctx->mrec));
ctx->mrec->bytes_in_use = cpu_to_le32(biu + asize);
a->type = AT_VOLUME_NAME;
a->length = cpu_to_le32(asize);
a->non_resident = 0;
a->name_length = 0;
a->name_offset = cpu_to_le16(24);
a->flags = cpu_to_le16(0);
a->instance = ctx->mrec->next_attr_instance;
ctx->mrec->next_attr_instance = cpu_to_le16((le16_to_cpu(
ctx->mrec->next_attr_instance) + 1) & 0xffff);
a->u.res.value_length = cpu_to_le32(label_len);
a->u.res.value_offset = a->name_offset;
a->u.res.resident_flags = 0;
a->u.res.reservedR = 0;
}
memcpy((u8*)a + le16_to_cpu(a->u.res.value_offset), new_label, label_len);
if (!opts.noaction && ntfs_inode_sync(vol->vol_ni)) {
ntfs_log_perror("Error writing MFT Record to disk");
goto err_out;
}
result = 0;
err_out:
free(new_label);
return result;
}
int ntfs_change_label(ntfs_volume *vol, char *label)
{
ntfs_attr_search_ctx *ctx;
ntfschar *new_label = NULL;
ATTR_RECORD *a;
int label_len;
int result = 0;
ctx = ntfs_attr_get_search_ctx(vol->vol_ni, NULL);
if (!ctx) {
ntfs_log_perror("Failed to get attribute search context");
goto err_out;
}
if (ntfs_attr_lookup(AT_VOLUME_NAME, AT_UNNAMED, 0, 0, 0, NULL, 0,
ctx)) {
if (errno != ENOENT) {
ntfs_log_perror("Lookup of $VOLUME_NAME attribute failed");
goto err_out;
}
/* The volume name attribute does not exist. Need to add it. */
a = NULL;
} else {
a = ctx->attr;
if (a->non_resident) {
ntfs_log_error("Error: Attribute $VOLUME_NAME must be "
"resident.\n");
goto err_out;
}
}
label_len = ntfs_mbstoucs(label, &new_label);
if (label_len == -1) {
ntfs_log_perror("Unable to convert label string to Unicode");
goto err_out;
}
label_len *= sizeof(ntfschar);
if (label_len > 0x100) {
ntfs_log_error("New label is too long. Maximum %u characters "
"allowed. Truncating excess characters.\n",
(unsigned)(0x100 / sizeof(ntfschar)));
label_len = 0x100;
new_label[label_len / sizeof(ntfschar)] = cpu_to_le16(L'\0');
}
if (a) {
if (resize_resident_attribute_value(ctx->mrec, a, label_len)) {
ntfs_log_perror("Error resizing resident attribute");
goto err_out;
}
} else {
/* sizeof(resident attribute record header) == 24 */
int asize = (24 + label_len + 7) & ~7;
u32 biu = le32_to_cpu(ctx->mrec->bytes_in_use);
if (biu + asize > le32_to_cpu(ctx->mrec->bytes_allocated)) {
errno = ENOSPC;
ntfs_log_perror("Error adding resident attribute");
goto err_out;
}
a = ctx->attr;
memmove((u8*)a + asize, a, biu - ((u8*)a - (u8*)ctx->mrec));
ctx->mrec->bytes_in_use = cpu_to_le32(biu + asize);
a->type = AT_VOLUME_NAME;
a->length = cpu_to_le32(asize);
a->non_resident = 0;
a->name_length = 0;
a->name_offset = cpu_to_le16(24);
a->flags = cpu_to_le16(0);
a->instance = ctx->mrec->next_attr_instance;
ctx->mrec->next_attr_instance = cpu_to_le16((le16_to_cpu(
ctx->mrec->next_attr_instance) + 1) & 0xffff);
a->value_length = cpu_to_le32(label_len);
a->value_offset = a->name_offset;
a->resident_flags = 0;
a->reservedR = 0;
}
memcpy((u8*)a + le16_to_cpu(a->value_offset), new_label, label_len);
if (ntfs_inode_sync(vol->vol_ni)) {
ntfs_log_perror("Error writing MFT Record to disk");
goto err_out;
}
result = 0;
err_out:
ntfs_attr_put_search_ctx(ctx);
free(new_label);
return result;
}