hw/9pfs/coxattr.c

   1 /*
   2  * 9p backend
   3  *
   4  * Copyright IBM, Corp. 2011
   5  *
   6  * Authors:
   7  *  Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2.  See
  10  * the COPYING file in the top-level directory.
  11  *
  12  */
  13
  14 #include "qemu/osdep.h"
  15 #include "fsdev/qemu-fsdev.h"
  16 #include "qemu/thread.h"
  17 #include "qemu/coroutine.h"
  18 #include "qemu/main-loop.h"
  19 #include "coth.h"
  20
  21 int coroutine_fn v9fs_co_llistxattr(V9fsPDU *pdu, V9fsPath *path, void *value,
  22                                     size_t size)
  23 {
  24     int err;
  25     V9fsState *s = pdu->s;
  26
  27     if (v9fs_request_cancelled(pdu)) {
  28         return -EINTR;
  29     }
  30     v9fs_path_read_lock(s);
  31     v9fs_co_run_in_worker(
  32         {
  33             err = s->ops->llistxattr(&s->ctx, path, value, size);
  34             if (err < 0) {
  35                 err = -errno;
  36             }
  37         });
  38     v9fs_path_unlock(s);
  39     return err;
  40 }
  41
  42 int coroutine_fn v9fs_co_lgetxattr(V9fsPDU *pdu, V9fsPath *path,
  43                                    V9fsString *xattr_name, void *value,
  44                                    size_t size)
  45 {
  46     int err;
  47     V9fsState *s = pdu->s;
  48
  49     if (v9fs_request_cancelled(pdu)) {
  50         return -EINTR;
  51     }
  52     v9fs_path_read_lock(s);
  53     v9fs_co_run_in_worker(
  54         {
  55             err = s->ops->lgetxattr(&s->ctx, path,
  56                                     xattr_name->data,
  57                                     value, size);
  58             if (err < 0) {
  59                 err = -errno;
  60             }
  61         });
  62     v9fs_path_unlock(s);
  63     return err;
  64 }
  65
  66 int coroutine_fn v9fs_co_lsetxattr(V9fsPDU *pdu, V9fsPath *path,
  67                                    V9fsString *xattr_name, void *value,
  68                                    size_t size, int flags)
  69 {
  70     int err;
  71     V9fsState *s = pdu->s;
  72
  73     if (v9fs_request_cancelled(pdu)) {
  74         return -EINTR;
  75     }
  76     v9fs_path_read_lock(s);
  77     v9fs_co_run_in_worker(
  78         {
  79             err = s->ops->lsetxattr(&s->ctx, path,
  80                                     xattr_name->data, value,
  81                                     size, flags);
  82             if (err < 0) {
  83                 err = -errno;
  84             }
  85         });
  86     v9fs_path_unlock(s);
  87     return err;
  88 }
  89
  90 int coroutine_fn v9fs_co_lremovexattr(V9fsPDU *pdu, V9fsPath *path,
  91                                       V9fsString *xattr_name)
  92 {
  93     int err;
  94     V9fsState *s = pdu->s;
  95
  96     if (v9fs_request_cancelled(pdu)) {
  97         return -EINTR;
  98     }
  99     v9fs_path_read_lock(s);
 100     v9fs_co_run_in_worker(
 101         {
 102             err = s->ops->lremovexattr(&s->ctx, path, xattr_name->data);
 103             if (err < 0) {
 104                 err = -errno;
 105             }
 106         });
 107     v9fs_path_unlock(s);
 108     return err;
 109 }