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Rev 2753 Rev 2763
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#include "vfs.h"
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#include "vfs.h"
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#include <ipc/ipc.h>
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#include <ipc/ipc.h>
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#include <async.h>
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#include <async.h>
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#include <errno.h>
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#include <errno.h>
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#include <string.h>
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#include <string.h>
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#include <stdarg.h>
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#include <bool.h>
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#include <bool.h>
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#include <futex.h>
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#include <futex.h>
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#include <libadt/list.h>
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#include <libadt/list.h>
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#include <atomic.h>
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#include <atomic.h>
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#include <vfs/canonify.h>
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#include <vfs/canonify.h>
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 *          of the whole VFS tree.
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 *          of the whole VFS tree.
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 *
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 *
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 * @return      EOK on success or an error code from errno.h.
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 * @return      EOK on success or an error code from errno.h.
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 */
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 */
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int vfs_lookup_internal(char *path, int lflag, vfs_lookup_res_t *result,
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int vfs_lookup_internal(char *path, int lflag, vfs_lookup_res_t *result,
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    vfs_pair_t *altroot)
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    vfs_pair_t *altroot, ...)
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{
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{
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    vfs_pair_t *root;
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    vfs_pair_t *root;
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    if (altroot)
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    if (altroot)
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        root = altroot;
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        root = altroot;
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    size_t len;
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    size_t len;
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    path = canonify(path, &len);
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    path = canonify(path, &len);
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    if (!path)
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    if (!path)
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        return EINVAL;
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        return EINVAL;
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    unsigned long index = 0;
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    if (lflag & L_LINK) {
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        va_list ap;
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        va_start(ap, altroot);
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        index = va_arg(ap, unsigned long);
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        va_end(ap);
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    }
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    futex_down(&plb_futex);
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    futex_down(&plb_futex);
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    plb_entry_t entry;
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    plb_entry_t entry;
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    link_initialize(&entry.plb_link);
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    link_initialize(&entry.plb_link);
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    entry.len = len;
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    entry.len = len;
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    memcpy(&plb[first], path, cnt1);
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    memcpy(&plb[first], path, cnt1);
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    memcpy(plb, &path[cnt1], cnt2);
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    memcpy(plb, &path[cnt1], cnt2);
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    ipc_call_t answer;
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    ipc_call_t answer;
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    int phone = vfs_grab_phone(root->fs_handle);
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    int phone = vfs_grab_phone(root->fs_handle);
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    aid_t req = async_send_4(phone, VFS_LOOKUP, (ipcarg_t) first,
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    aid_t req = async_send_5(phone, VFS_LOOKUP, (ipcarg_t) first,
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        (ipcarg_t) (first + len - 1) % PLB_SIZE,
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        (ipcarg_t) (first + len - 1) % PLB_SIZE,
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        (ipcarg_t) root->dev_handle, (ipcarg_t) lflag, &answer);
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        (ipcarg_t) root->dev_handle, (ipcarg_t) lflag, (ipcarg_t) index,
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        &answer);
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    vfs_release_phone(phone);
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    vfs_release_phone(phone);
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    ipcarg_t rc;
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    ipcarg_t rc;
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    async_wait_for(req, &rc);
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    async_wait_for(req, &rc);
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