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Add new API: ntfs_attrlist_need.

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(Logical change 1.580)
This commit is contained in:
(none)!yura 2004-09-26 19:31:31 +00:00
parent e418cf5345
commit a373b59fd3
1 changed files with 59 additions and 11 deletions
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70
libntfs/attrlist.c
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@ -33,6 +33,54 @@
#include "debug.h"
#include "unistr.h"
/**
* ntfs_attrlist_need - check whether attribute need attribute list
* @ni: opened ntfs inode for which perform check
*
* Check whether all are atributes belong to one MFT record, in that case
* attribute list is not needed.
*
* Return 1 if inode need attribute list, 0 if not, -1 on error with errno set
* to the error code. If function succeed errno set to 0. The following error
* codes are defined:
* EINVAL - Invalid argumets passed to function or attribute haven't got
* attribute list.
*/
int ntfs_attrlist_need(ntfs_inode *ni) {
ATTR_LIST_ENTRY *ale;
if (!ni) {
Dprintf("%s(): Invalid argumets.\n", __FUNCTION__);
errno = EINVAL;
return -1;
}
Dprintf("%s(): Entering for inode 0x%llx.\n",
__FUNCTION__, (long long) ni->mft_no);
if (!NInoAttrList(ni)) {
Dprintf("%s(): Inode haven't got attribute list.\n",
__FUNCTION__);
errno = EINVAL;
return -1;
}
if (!ni->attr_list) {
Dprintf("%s(): Corrput in-memory struct.\n", __FUNCTION__);
errno = EINVAL;
return -1;
}
errno = 0;
ale = (ATTR_LIST_ENTRY *)ni->attr_list;
while ((u8*)ale < ni->attr_list + ni->attr_list_size) {
if (MREF_LE(ale->mft_reference) != ni->mft_no)
return 1;
ale = (ATTR_LIST_ENTRY *)((u8*)ale + le16_to_cpu(ale->length));
}
return 0;
}
/**
* ntfs_attrlist_set - set new attribute list for ntfs inode
* @ni: opened ntfs inode attribute list set for
@ -52,16 +100,16 @@ int ntfs_attrlist_set(ntfs_inode *ni, u8 *new_al, int new_al_len)
runlist *rl;
int rl_size;
int err;
if (!ni || !new_al || new_al_len < 1) {
Dprintf("%s(): Invalid argumets.\n", __FUNCTION__);
errno = EINVAL;
return -1;
}
Dprintf("%s(): Entering for inode 0x%llx, new_al_len %d.\n",
__FUNCTION__, (long long) ni->mft_no, new_al_len);
/* Make attribute list length 8 byte aligment. */
new_al_len = (new_al_len + 7) & ~7;
@ -163,12 +211,12 @@ int ntfs_attrlist_entry_add(ntfs_inode *ni, ATTR_RECORD *attr)
errno = EINVAL;
return -1;
}
mref = MK_LE_MREF(ni->mft_no, le16_to_cpu(ni->mrec->sequence_number));
if (ni->nr_extents == -1)
ni = ni->base_ni;
if (!NInoAttrList(ni)) {
Dprintf("%s(): Attribute list isn't present.\n", __FUNCTION__);
errno = ENOENT;
@ -241,7 +289,7 @@ int ntfs_attrlist_entry_add(ntfs_inode *ni, ATTR_RECORD *attr)
ale->mft_reference = mref;
ale->instance = attr->instance;
memcpy(ale->name, (u8 *)attr + attr->name_offset, attr->name_length);
/* Set new runlist. */
if (ntfs_attrlist_set(ni, new_al, new_al_len)) {
err = errno;
@ -271,19 +319,19 @@ int ntfs_attrlist_entry_rm(ntfs_attr_search_ctx *ctx)
ntfs_inode *base_ni;
ATTR_LIST_ENTRY *ale;
int err;
if (!ctx || !ctx->ntfs_ino || !ctx->attr || !ctx->al_entry) {
Dprintf("%s(): Invalid argumets.\n", __FUNCTION__);
errno = EINVAL;
return -1;
}
if (ctx->base_ntfs_ino)
base_ni = ctx->base_ntfs_ino;
else
base_ni = ctx->ntfs_ino;
ale = ctx->al_entry;
Dprintf("%s(): Entering for inode 0x%llx, attr 0x%x, lowest_vcn "
"%lld.\n", __FUNCTION__, (long long) ctx->ntfs_ino->mft_no,
(unsigned) le32_to_cpu(ctx->attr->type),
@ -294,7 +342,7 @@ int ntfs_attrlist_entry_rm(ntfs_attr_search_ctx *ctx)
errno = ENOENT;
return -1;
}
/* Allocate memory for new attribute list. */
new_al_len = base_ni->attr_list_size - le16_to_cpu(ale->length);
new_al = malloc(new_al_len);
@ -303,7 +351,7 @@ int ntfs_attrlist_entry_rm(ntfs_attr_search_ctx *ctx)
errno = ENOMEM;
return -1;
}
/* Copy entries from old attribute list to new. */
memcpy(new_al, base_ni->attr_list, (u8*)ale - base_ni->attr_list);
memcpy(new_al + ((u8*)ale - base_ni->attr_list), (u8*)ale + le16_to_cpu(