Attachment 233566 Details for Bug 263625 – Type cast test for version 7.8 or earlier

Type cast test for version 7.8 or earlier

fuse-create-test.c (text/plain), 2.51 KB, created by Ali Abdallah on 2022-04-28 17:35:14 UTC

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Creator: Ali Abdallah

Created: 2022-04-28 17:35:14 UTC

Size: 2.51 KB

patch

obsolete

>#include <stdio.h>
>#include <string.h>
>#include <stdint.h>
>#include <unistd.h>
>#include <fcntl.h>
>
>/*********************************************
> *              KERNEL TYPES
> *********************************************/
>struct fuse_attr {
>	uint64_t	ino;
>	uint64_t	size;
>	uint64_t	blocks;
>	uint64_t	atime;
>	uint64_t	mtime;
>	uint64_t	ctime;
>	uint32_t	atimensec;
>	uint32_t	mtimensec;
>	uint32_t	ctimensec;
>	uint32_t	mode;
>	uint32_t	nlink;
>	uint32_t	uid;
>	uint32_t	gid;
>	uint32_t	rdev;
>	uint32_t	blksize;
>	uint32_t	padding;
>};
>
>struct fuse_entry_out {
>	uint64_t	nodeid;		/* Inode ID */
>	uint64_t	generation;	/* Inode generation: nodeid:gen must
>					   be unique for the fs's lifetime */
>	uint64_t	entry_valid;	/* Cache timeout for the name */
>	uint64_t	attr_valid;	/* Cache timeout for the attributes */
>	uint32_t	entry_valid_nsec;
>	uint32_t	attr_valid_nsec;
>	struct fuse_attr attr;
>};
>
>struct fuse_open_out {
>	uint64_t	fh;
>	uint32_t	open_flags;
>	uint32_t	padding;
>};
>
>
>/***************************************************
> * USERSPACE TYPES for protocol version 7.5 (or 7.8)
> ***************************************************/
>struct fuse_attr_userspace {
>	uint64_t	ino;
>	uint64_t	size;
>	uint64_t	blocks;
>	uint64_t	atime;
>	uint64_t	mtime;
>	uint64_t	ctime;
>	uint32_t	atimensec;
>	uint32_t	mtimensec;
>	uint32_t	ctimensec;
>	uint32_t	mode;
>	uint32_t	nlink;
>	uint32_t	uid;
>	uint32_t	gid;
>	uint32_t	rdev;
>};
>
>struct fuse_entry_out_userspace {
>	uint64_t	nodeid;		/* Inode ID */
>	uint64_t	generation;	/* Inode generation: nodeid:gen must
>					   be unique for the fs's lifetime */
>	uint64_t	entry_valid;	/* Cache timeout for the name */
>	uint64_t	attr_valid;	/* Cache timeout for the attributes */
>	uint32_t	entry_valid_nsec;
>	uint32_t	attr_valid_nsec;
>	struct fuse_attr_userspace attr;
>};
>
>struct create_out {
>	struct fuse_entry_out_userspace entry;
>	struct fuse_open_out open;
>};
>
>int main (int argc, char **argv)
>{
>	struct fuse_entry_out *feo;
>	struct fuse_open_out *foo;
>
>	struct create_out fdip;
>
>	/* Userspace fills these fields */
>	fdip.entry.attr_valid_nsec = 1;
>	fdip.entry.entry_valid_nsec = 1;
>	fdip.open.fh = 13;
>	fdip.open.open_flags = O_RDWR;
>	fdip.open.padding = 0;
>
>	/* With the following cast, fuse on FreeBSD Will get */
>	feo = &fdip;
>
>	foo = (struct fuse_open_out*)(feo + 1);
>	printf("ORIG: Wrong file handle %ld != %ld\n",
>			foo->fh, fdip.open.fh);
>
>	/* But it should be as follows */
>	foo = (struct fuse_open_out*)((char*)feo + sizeof(struct fuse_entry_out_userspace));
>	printf("DIFF: File handle %ld == %ld\n",
>			foo->fh, fdip.open.fh);
>
>	return(0);
>}

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Attachments on bug 263625: 233558 | 233566