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71d72ececa
As recent CVE-2023-2861 (fixed by f6b0de53fb) once again showed, the 9p
'proxy' fs driver is in bad shape. Using the 'proxy' backend was already
discouraged for safety reasons before and we recommended to use the
'local' backend (preferably in conjunction with its 'mapped' security
model) instead, but now it is time to officially deprecate the 'proxy'
backend.
Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Message-Id: <E1qDkmw-0007M1-8f@lizzy.crudebyte.com>
102 lines
2.0 KiB
C
102 lines
2.0 KiB
C
/*
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* 9p Proxy callback
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*
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* Copyright IBM, Corp. 2011
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*
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* Authors:
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* M. Mohan Kumar <mohan@in.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*/
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/*
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* NOTE: The 9p 'proxy' backend is deprecated (since QEMU 8.1) and will be
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* removed in a future version of QEMU!
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*/
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#ifndef QEMU_9P_PROXY_H
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#define QEMU_9P_PROXY_H
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#define PROXY_MAX_IO_SZ (64 * 1024)
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#define V9FS_FD_VALID INT_MAX
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/*
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* proxy iovec only support one element and
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* marsha/unmarshal doesn't do little endian conversion.
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*/
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#define proxy_unmarshal(in_sg, offset, fmt, args...) \
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v9fs_iov_unmarshal(in_sg, 1, offset, 0, fmt, ##args)
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#define proxy_marshal(out_sg, offset, fmt, args...) \
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v9fs_iov_marshal(out_sg, 1, offset, 0, fmt, ##args)
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union MsgControl {
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struct cmsghdr cmsg;
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char control[CMSG_SPACE(sizeof(int))];
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};
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typedef struct {
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uint32_t type;
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uint32_t size;
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} ProxyHeader;
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#define PROXY_HDR_SZ (sizeof(ProxyHeader))
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enum {
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T_SUCCESS = 0,
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T_ERROR,
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T_OPEN,
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T_CREATE,
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T_MKNOD,
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T_MKDIR,
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T_SYMLINK,
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T_LINK,
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T_LSTAT,
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T_READLINK,
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T_STATFS,
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T_CHMOD,
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T_CHOWN,
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T_TRUNCATE,
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T_UTIME,
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T_RENAME,
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T_REMOVE,
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T_LGETXATTR,
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T_LLISTXATTR,
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T_LSETXATTR,
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T_LREMOVEXATTR,
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T_GETVERSION,
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};
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typedef struct {
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uint64_t st_dev;
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uint64_t st_ino;
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uint64_t st_nlink;
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uint32_t st_mode;
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uint32_t st_uid;
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uint32_t st_gid;
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uint64_t st_rdev;
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uint64_t st_size;
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uint64_t st_blksize;
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uint64_t st_blocks;
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uint64_t st_atim_sec;
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uint64_t st_atim_nsec;
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uint64_t st_mtim_sec;
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uint64_t st_mtim_nsec;
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uint64_t st_ctim_sec;
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uint64_t st_ctim_nsec;
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} ProxyStat;
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typedef struct {
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uint64_t f_type;
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uint64_t f_bsize;
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uint64_t f_blocks;
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uint64_t f_bfree;
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uint64_t f_bavail;
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uint64_t f_files;
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uint64_t f_ffree;
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uint64_t f_fsid[2];
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uint64_t f_namelen;
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uint64_t f_frsize;
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} ProxyStatFS;
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#endif
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