cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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9p-util.c (1670B)

      1/*
      2 * 9p utilities
      3 *
      4 * Copyright IBM, Corp. 2017
      5 *
      6 * Authors:
      7 *  Greg Kurz <groug@kaod.org>
      8 *
      9 * This work is licensed under the terms of the GNU GPL, version 2 or later.
     10 * See the COPYING file in the top-level directory.
     11 */
     12
     13/*
     14 * Not so fast! You might want to read the 9p developer docs first:
     15 * https://wiki.qemu.org/Documentation/9p
     16 */
     17
     18#include "qemu/osdep.h"
     19#include "qemu/xattr.h"
     20#include "9p-util.h"
     21
     22ssize_t fgetxattrat_nofollow(int dirfd, const char *filename, const char *name,
     23                             void *value, size_t size)
     24{
     25    char *proc_path = g_strdup_printf("/proc/self/fd/%d/%s", dirfd, filename);
     26    int ret;
     27
     28    ret = lgetxattr(proc_path, name, value, size);
     29    g_free(proc_path);
     30    return ret;
     31}
     32
     33ssize_t flistxattrat_nofollow(int dirfd, const char *filename,
     34                              char *list, size_t size)
     35{
     36    char *proc_path = g_strdup_printf("/proc/self/fd/%d/%s", dirfd, filename);
     37    int ret;
     38
     39    ret = llistxattr(proc_path, list, size);
     40    g_free(proc_path);
     41    return ret;
     42}
     43
     44ssize_t fremovexattrat_nofollow(int dirfd, const char *filename,
     45                                const char *name)
     46{
     47    char *proc_path = g_strdup_printf("/proc/self/fd/%d/%s", dirfd, filename);
     48    int ret;
     49
     50    ret = lremovexattr(proc_path, name);
     51    g_free(proc_path);
     52    return ret;
     53}
     54
     55int fsetxattrat_nofollow(int dirfd, const char *filename, const char *name,
     56                         void *value, size_t size, int flags)
     57{
     58    char *proc_path = g_strdup_printf("/proc/self/fd/%d/%s", dirfd, filename);
     59    int ret;
     60
     61    ret = lsetxattr(proc_path, name, value, size, flags);
     62    g_free(proc_path);
     63    return ret;
     64}