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ntfs-3g
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- update ntfs_attrlist_set 

(Logical change 1.599)
edge.strict_endians
(none)!yura 2004-10-10 17:20:48 +00:00
parent a9ba7534a1
commit d42a5b46f4
1 changed files with 53 additions and 21 deletions
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74
libntfs/attrlist.c
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@ -46,7 +46,8 @@
* EINVAL - Invalid argumets passed to function or attribute haven't got
* attribute list.
*/
int ntfs_attrlist_need(ntfs_inode *ni) {
int ntfs_attrlist_need(ntfs_inode *ni)
{
ATTR_LIST_ENTRY *ale;
if (!ni) {
@ -113,34 +114,57 @@ int ntfs_attrlist_set(ntfs_inode *ni, u8 *new_al, int new_al_len)
/* Make attribute list length 8 byte aligment. */
new_al_len = (new_al_len + 7) & ~7;
/* Resize $ATTRIBUTE_LIST attribute. */
na = ntfs_attr_open(ni, AT_ATTRIBUTE_LIST, 0, 0);
if (!na) {
err = errno;
Dprintf("%s(): Coudn't open $ATTRIBUTE_LIST.\n", __FUNCTION__);
goto err_out;
}
/*
* Setup im-memory attribute list. We need this to perform attribute
* truncate (we need update attribute list in case other attributes
* will be moved away from their current MFT record).
*/
if (NInoAttrList(ni) && ni->attr_list)
free(ni->attr_list);
ni->attr_list = new_al;
ni->attr_list_size = new_al_len;
NInoSetAttrList(ni);
NInoAttrListSetDirty(ni);
/* Resize $ATTRIBUTE_LIST attribute. */
if (ntfs_attr_truncate(na, new_al_len)) {
if (errno == ENOSPC) {
// FIXME: Free space in mft record and try again.
err = ENOTSUP;
goto err_out;
} else {
err = errno;
Dprintf("%s(): $ATTRIBUTE_LIST resize failed.\n",
__FUNCTION__);
goto err_out;
}
/*
* FIXME: We leave new attribute list. But need to restore old
* and update in it records for moved attributes. Difficult to
* do if we haven't attribute list before truncate and records
* were moved.
*/
err = errno;
Dprintf("%s(): Eeek! $ATTRIBUTE_LIST resize failed. Probably "
"leaving inconsist metadata.\n", __FUNCTION__);
goto err_out;
}
/* Update ntfs inode. */
/* Update in-memory ntfs inode. */
if (NAttrNonResident(na)) {
/* Create copy of new runlist. */
if (ntfs_attr_map_whole_runlist(na)) {
Dprintf("%s(): Failed to map runlist.\n", __FUNCTION__);
/*
* FIXME: Probably leaving inconsist na->attr_list_rl.
* What shall we do here? We can't simply restore old
* attribute list, because attributes maybe moved. But
* we can't get runlist for new attribute list so we
* can't update in-memory structs.
*/
Dprintf("%s(): Failed to map runlist. Probably leaving "
"inconsist na->attr_list_rl.\n", __FUNCTION__);
if (ntfs_attr_truncate(na, ni->attr_list_size))
Dprintf("%s(): Rollback failed. Leaving "
"inconsist metadata.\n", __FUNCTION__);
if (NAttrNonResident(na))
NInoSetAttrListNonResident(ni);
else
NInoClearAttrListNonResident(ni);
err = EIO;
goto err_out;
}
@ -149,10 +173,22 @@ int ntfs_attrlist_set(ntfs_inode *ni, u8 *new_al, int new_al_len)
rl_size = (rl_size * sizeof(runlist_element) + 0xfff) & ~0xfff;
rl = malloc(rl_size);
if (!rl) {
Dprintf("%s(): Not enough memory.\n", __FUNCTION__);
/*
* FIXME: Probably leaving inconsist na->attr_list_rl.
* What shall we do here? We can't simply restore old
* attribute list, because attributes maybe moved. But
* we can't get runlist for new attribute list so we
* can't update in-memory structs.
*/
Dprintf("%s(): Not enough memory. Probably leaving "
"inconsist na->attr_list_rl.\n", __FUNCTION__);
if (ntfs_attr_truncate(na, ni->attr_list_size))
Dprintf("%s(): Rollback failed. Leaving "
"inconsist metadata.\n", __FUNCTION__);
if (NAttrNonResident(na))
NInoSetAttrListNonResident(ni);
else
NInoClearAttrListNonResident(ni);
err = ENOMEM;
goto err_out;
}
@ -169,12 +205,8 @@ int ntfs_attrlist_set(ntfs_inode *ni, u8 *new_al, int new_al_len)
}
}
if (ni->attr_list)
free(ni->attr_list);
ni->attr_list = new_al;
ni->attr_list_size = new_al_len;
NInoSetAttrList(ni);
NInoAttrListSetDirty(ni);
/* Done! */
ntfs_attr_close(na);
return 0;
err_out:
if (na)