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NTFS: Optimize for fs_walk function.

This commit is contained in:
threedeyes 2012-10-31 00:33:10 +00:00
parent ba49a8daf7
commit ef544e59f2
1 changed files with 13 additions and 33 deletions
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46
src/add-ons/kernel/file_systems/ntfs/fs_func.c
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@ -508,70 +508,50 @@ exit:
status_t
fs_walk(fs_volume *_vol, fs_vnode *_dir, const char *file, ino_t *vnid)
fs_walk(fs_volume *_vol, fs_vnode *_dir, const char *file, ino_t *_vnid)
{
nspace *ns = (nspace*)_vol->private_volume;
vnode *baseNode = (vnode*)_dir->private_node;
vnode *newNode = NULL;
ntfschar *uname = NULL;
ntfs_inode *dir_ni = NULL;
status_t result = B_NO_ERROR;
int uname_len;
LOCK_VOL(ns);
TRACE("fs_walk - ENTER : find for \"%s\"\n",file);
if (ns == NULL || _dir == NULL || file == NULL || vnid == NULL) {
if (ns == NULL || _dir == NULL || file == NULL || _vnid == NULL) {
result = EINVAL;
goto exit;
}
if (!strcmp(file, ".")) {
*vnid = baseNode->vnid;
if (get_vnode(_vol, *vnid, (void**)&newNode) != 0)
*_vnid = baseNode->vnid;
if (get_vnode(_vol, *_vnid, (void**)&newNode) != 0)
result = ENOENT;
} else if (!strcmp(file, "..") && baseNode->vnid != FILE_root) {
*vnid = baseNode->parent_vnid;
if (get_vnode(_vol, *vnid, (void**)&newNode) != 0)
*_vnid = baseNode->parent_vnid;
if (get_vnode(_vol, *_vnid, (void**)&newNode) != 0)
result = ENOENT;
} else {
uname = ntfs_calloc(MAX_PATH);
uname_len = ntfs_mbstoucs(file, &uname);
if (uname_len < 0) {
result = EILSEQ;
ino_t vnid = ntfs_inode_lookup(_vol, baseNode->vnid, file);
if (vnid == (u64)-1) {
result = errno;
goto exit;
}
dir_ni = ntfs_inode_open(ns->ntvol, baseNode->vnid);
if (dir_ni == NULL) {
result = ENOENT;
goto exit;
}
*vnid = MREF(ntfs_inode_lookup_by_name(dir_ni, uname, uname_len));
TRACE("fs_walk - VNID = %d\n",*vnid);
ntfs_inode_close(dir_ni);
if (*vnid == (u64)-1) {
result = EINVAL;
goto exit;
}
if (get_vnode(_vol, *vnid, (void**)&newNode) != 0)
if (get_vnode(_vol, vnid, (void**)&newNode) != 0)
result = ENOENT;
if (newNode!=NULL)
newNode->parent_vnid = baseNode->vnid;
*_vnid = vnid;
}
exit:
TRACE("fs_walk - EXIT, result is %s\n", strerror(result));
if (uname)
free(uname);
UNLOCK_VOL(ns);
return result;