Joan Lledó, le dim. 12 déc. 2021 14:08:16 +0100, a ecrit:
> From: Marcus Brinkmann <[email protected]>
>
> * libnetfs/iostubs.c: implement io_map
Obviously alright since it's basically the same as in libdiskfs :)
> ---
> libnetfs/iostubs.c | 46 +++++++++++++++++++++++++++++++++++++++++++---
> 1 file changed, 43 insertions(+), 3 deletions(-)
>
> diff --git a/libnetfs/iostubs.c b/libnetfs/iostubs.c
> index a5ff4504..df48f8b7 100644
> --- a/libnetfs/iostubs.c
> +++ b/libnetfs/iostubs.c
> @@ -1,4 +1,4 @@
> -/*
> +/*
> Copyright (C) 1995 Free Software Foundation, Inc.
> Written by Michael I. Bushnell, p/BSG.
>
> @@ -23,11 +23,51 @@
> #include "io_S.h"
>
> error_t __attribute__((weak))
> -netfs_S_io_map (struct protid *user,
> +netfs_S_io_map (struct protid *user,
> mach_port_t *rdobj, mach_msg_type_name_t *rdobjtype,
> mach_port_t *wrobj, mach_msg_type_name_t *wrobjtype)
> {
> - return EOPNOTSUPP;
> + int flags;
> + struct node *node;
> +
> + if (!user)
> + return EOPNOTSUPP;
> +
> + *wrobj = *rdobj = MACH_PORT_NULL;
> +
> + node = user->po->np;
> + flags = user->po->openstat & (O_READ | O_WRITE);
> +
> + pthread_mutex_lock (&node->lock);
> + switch (flags)
> + {
> + case O_READ | O_WRITE:
> + *wrobj = *rdobj = netfs_get_filemap (node, VM_PROT_READ
> |VM_PROT_WRITE);
> + if (*wrobj == MACH_PORT_NULL)
> + goto error;
> + mach_port_mod_refs (mach_task_self (), *rdobj, MACH_PORT_RIGHT_SEND,
> 1);
> + break;
> + case O_READ:
> + *rdobj = netfs_get_filemap (node, VM_PROT_READ);
> + if (*rdobj == MACH_PORT_NULL)
> + goto error;
> + break;
> + case O_WRITE:
> + *wrobj = netfs_get_filemap (node, VM_PROT_WRITE);
> + if (*wrobj == MACH_PORT_NULL)
> + goto error;
> + break;
> + }
> + pthread_mutex_unlock (&node->lock);
> +
> + *rdobjtype = MACH_MSG_TYPE_MOVE_SEND;
> + *wrobjtype = MACH_MSG_TYPE_MOVE_SEND;
> +
> + return 0;
> +
> +error:
> + pthread_mutex_unlock (&node->lock);
> + return errno;
> }
>
> error_t __attribute__((weak))
> --
> 2.31.1
