/**
* ntfs_inode_update_times - update selected time fields for ntfs inode
* @ni: ntfs inode for which update time fields
* @mask: select which time fields should be updated
*
* This function updates time fields to current time. Fields to update are
* selected using @mask (see enum @ntfs_time_update_flags for posssible values).
*/
void ntfs_inode_update_times(ntfs_inode *ni, ntfs_time_update_flags mask)
{
time_t now;
if (!ni) {
ntfs_log_error("%s(): Invalid arguments.\n", __FUNCTION__);
return;
}
if ((ni->mft_no < FILE_first_user && ni->mft_no != FILE_root) ||
NVolReadOnly(ni->vol) || !mask)
return;
now = time(NULL);
if (mask & NTFS_UPDATE_ATIME)
ni->last_access_time = now;
if (mask & NTFS_UPDATE_MTIME)
ni->last_data_change_time = now;
if (mask & NTFS_UPDATE_CTIME)
ni->last_mft_change_time = now;
set_nino_flag(ni, TimesDirty);
NInoFileNameSetDirty(ni);
NInoSetDirty(ni);
}
/**
* ntfs_inode_open - open an inode ready for access
* @vol: volume to get the inode from
* @mref: inode number / mft record number to open
*
* Allocate an ntfs_inode structure and initialize it for the given inode
* specified by @mref. @mref specifies the inode number / mft record to read,
* including the sequence number, which can be 0 if no sequence number checking
* is to be performed.
*
* Then, allocate a buffer for the mft record, read the mft record from the
* volume @vol, and attach it to the ntfs_inode structure (->mrec). The
* mft record is mst deprotected and sanity checked for validity and we abort
* if deprotection or checks fail.
*
* Finally, search for an attribute list attribute in the mft record and if one
* is found, load the attribute list attribute value and attach it to the
* ntfs_inode structure (->attr_list). Also set the NI_AttrList bit to indicate
* this.
*
* Return a pointer to the ntfs_inode structure on success or NULL on error,
* with errno set to the error code.
*/
ntfs_inode *ntfs_inode_open(ntfs_volume *vol, const MFT_REF mref)
{
s64 l;
ntfs_inode *ni = NULL;
ntfs_attr_search_ctx *ctx;
STANDARD_INFORMATION *std_info;
le32 lthle;
int olderrno;
ntfs_log_enter("Entering for inode %lld\n", (long long)MREF(mref));
if (!vol) {
errno = EINVAL;
goto out;
}
ni = __ntfs_inode_allocate(vol);
if (!ni)
goto out;
if (ntfs_file_record_read(vol, mref, &ni->mrec, NULL))
goto err_out;
if (!(ni->mrec->flags & MFT_RECORD_IN_USE)) {
errno = ENOENT;
goto err_out;
}
ni->mft_no = MREF(mref);
ctx = ntfs_attr_get_search_ctx(ni, NULL);
if (!ctx)
goto err_out;
/* Receive some basic information about inode. */
if (ntfs_attr_lookup(AT_STANDARD_INFORMATION, AT_UNNAMED,
0, CASE_SENSITIVE, 0, NULL, 0, ctx)) {
if (!ni->mrec->base_mft_record)
ntfs_log_perror("No STANDARD_INFORMATION in base record"
" %lld", (long long)MREF(mref));
goto put_err_out;
}
std_info = (STANDARD_INFORMATION *)((u8 *)ctx->attr +
le16_to_cpu(ctx->attr->value_offset));
ni->flags = std_info->file_attributes;
ni->creation_time = ntfs2utc(std_info->creation_time);
ni->last_data_change_time = ntfs2utc(std_info->last_data_change_time);
ni->last_mft_change_time = ntfs2utc(std_info->last_mft_change_time);
ni->last_access_time = ntfs2utc(std_info->last_access_time);
/* JPA insert v3 extensions if present */
/* length may be seen as 72 (v1.x) or 96 (v3.x) */
lthle = ctx->attr->length;
if (le32_to_cpu(lthle) > sizeof(STANDARD_INFORMATION)) {
set_nino_flag(ni, v3_Extensions);
ni->owner_id = std_info->owner_id;
ni->security_id = std_info->security_id;
ni->quota_charged = std_info->quota_charged;
ni->usn = std_info->usn;
} else {
clear_nino_flag(ni, v3_Extensions);
ni->owner_id = 0;
ni->security_id = 0;
}
/* Set attribute list information. */
olderrno = errno;
if (ntfs_attr_lookup(AT_ATTRIBUTE_LIST, AT_UNNAMED, 0, 0, 0, NULL, 0,
ctx)) {
if (errno != ENOENT)
goto put_err_out;
/* Attribute list attribute does not present. */
/* restore previous errno to avoid misinterpretation */
errno = olderrno;
goto get_size;
}
NInoSetAttrList(ni);
l = ntfs_get_attribute_value_length(ctx->attr);
if (!l)
goto put_err_out;
if (l > 0x40000) {
errno = EIO;
ntfs_log_perror("Too large attrlist attribute (%lld), inode "
"%lld", (long long)l, (long long)MREF(mref));
goto put_err_out;
}
ni->attr_list_size = l;
ni->attr_list = ntfs_malloc(ni->attr_list_size);
if (!ni->attr_list)
goto put_err_out;
l = ntfs_get_attribute_value(vol, ctx->attr, ni->attr_list);
if (!l)
goto put_err_out;
if (l != ni->attr_list_size) {
errno = EIO;
ntfs_log_perror("Unexpected attrlist size (%lld <> %u), inode "
"%lld", (long long)l, ni->attr_list_size,
(long long)MREF(mref));
goto put_err_out;
}
get_size:
olderrno = errno;
if (ntfs_attr_lookup(AT_DATA, AT_UNNAMED, 0, 0, 0, NULL, 0, ctx)) {
if (errno != ENOENT)
goto put_err_out;
/* Directory or special file. */
/* restore previous errno to avoid misinterpretation */
errno = olderrno;
ni->data_size = ni->allocated_size = 0;
} else {
if (ctx->attr->non_resident) {
ni->data_size = sle64_to_cpu(ctx->attr->data_size);
if (ctx->attr->flags &
(ATTR_IS_COMPRESSED | ATTR_IS_SPARSE))
ni->allocated_size = sle64_to_cpu(
ctx->attr->compressed_size);
else
ni->allocated_size = sle64_to_cpu(
ctx->attr->allocated_size);
} else {
ni->data_size = le32_to_cpu(ctx->attr->value_length);
ni->allocated_size = (ni->data_size + 7) & ~7;
}
}
ntfs_attr_put_search_ctx(ctx);
out:
ntfs_log_leave("\n");
return ni;
put_err_out:
ntfs_attr_put_search_ctx(ctx);
err_out:
__ntfs_inode_release(ni);
ni = NULL;
goto out;
}
int ntfs_inode_set_times(ntfs_inode *ni, const char *value, size_t size,
int flags)
{
ntfs_attr_search_ctx *ctx;
STANDARD_INFORMATION *std_info;
FILE_NAME_ATTR *fn;
const u64 *times;
ntfs_time now;
int cnt;
int ret;
ret = -1;
if ((size >= 8) && !(flags & XATTR_CREATE)) {
times = (const u64*)value;
now = ntfs_current_time();
/* update the standard information attribute */
ctx = ntfs_attr_get_search_ctx(ni, NULL);
if (ctx) {
if (ntfs_attr_lookup(AT_STANDARD_INFORMATION,
AT_UNNAMED, 0, CASE_SENSITIVE,
0, NULL, 0, ctx)) {
ntfs_log_perror("Failed to get standard info (inode %lld)",
(long long)ni->mft_no);
} else {
std_info = (STANDARD_INFORMATION *)((u8 *)ctx->attr +
le16_to_cpu(ctx->attr->value_offset));
/*
* Mark times set to avoid overwriting
* them when the inode is closed.
* The inode structure must also be updated
* (with loss of precision) because of cacheing.
* TODO : use NTFS precision in inode, and
* return sub-second times in getattr()
*/
set_nino_flag(ni, TimesSet);
std_info->creation_time = cpu_to_le64(times[0]);
ni->creation_time
= std_info->creation_time;
if (size >= 16) {
std_info->last_data_change_time = cpu_to_le64(times[1]);
ni->last_data_change_time
= std_info->last_data_change_time;
}
if (size >= 24) {
std_info->last_access_time = cpu_to_le64(times[2]);
ni->last_access_time
= std_info->last_access_time;
}
std_info->last_mft_change_time = now;
ni->last_mft_change_time = now;
ntfs_inode_mark_dirty(ctx->ntfs_ino);
NInoFileNameSetDirty(ni);
/* update the file names attributes */
ntfs_attr_reinit_search_ctx(ctx);
cnt = 0;
while (!ntfs_attr_lookup(AT_FILE_NAME,
AT_UNNAMED, 0, CASE_SENSITIVE,
0, NULL, 0, ctx)) {
fn = (FILE_NAME_ATTR*)((u8 *)ctx->attr +
le16_to_cpu(ctx->attr->value_offset));
fn->creation_time
= cpu_to_le64(times[0]);
if (size >= 16)
fn->last_data_change_time
= cpu_to_le64(times[1]);
if (size >= 24)
fn->last_access_time
= cpu_to_le64(times[2]);
fn->last_mft_change_time = now;
cnt++;
}
if (cnt)
ret = 0;
else {
ntfs_log_perror("Failed to get file names (inode %lld)",
(long long)ni->mft_no);
}
}
ntfs_attr_put_search_ctx(ctx);
}
} else
if (size < 8)
errno = ERANGE;
else
errno = EEXIST;
return (ret);
}
