backtrace definitions and support for getmntinfo and getvfsstat

[0323pin]

After the failures of merging #3361 as a follow-up to #3359 I've spent sometime making sure everything is indeed supported and defined.

~> grep -r "MNT_WAIT" /usr/include/sys/fstypes.h; grep -r "MNT_NOWAIT" /usr/include/sys/fstypes.h; grep -r "MNT_LAZY" /usr/include/sys/fstypes.h
#define	MNT_WAIT	1	/* synchronously wait for I/O to complete */
#define	MNT_NOWAIT	2	/* start all I/O, but do not wait for it */
#define	MNT_LAZY 	3	/* push data not written by filesystem syncer */

~> grep -r "getmntinfo" /usr/include/sys/; grep -r "getvfsstat" /usr/include/sys/
/usr/include/sys/statvfs.h:int	getmntinfo(struct statvfs **, int)
/usr/include/sys/statvfs.h:    __RENAME(__getmntinfo90);
/usr/include/sys/fstypes.h: * waitfor flags to vfs_sync() and getvfsstat()
/usr/include/sys/statvfs.h:int	getvfsstat(struct statvfs *, size_t, int)
/usr/include/sys/statvfs.h:    __RENAME(__getvfsstat90);
/usr/include/sys/syscall.h:/* syscall: "compat_90_getvfsstat" ret: "int" args: "struct statvfs90 *" "size_t" "int" */
/usr/include/sys/syscall.h:#define	SYS_compat_90_getvfsstat	356
/usr/include/sys/syscall.h:/* syscall: "__getvfsstat90" ret: "int" args: "struct statvfs *" "size_t" "int" */
/usr/include/sys/syscall.h:#define	SYS___getvfsstat90	483
/usr/include/sys/syscallargs.h:struct compat_90_sys_getvfsstat_args {
/usr/include/sys/syscallargs.h:check_syscall_args(compat_90_sys_getvfsstat)
/usr/include/sys/syscallargs.h:struct sys___getvfsstat90_args {
/usr/include/sys/syscallargs.h:check_syscall_args(sys___getvfsstat90)
/usr/include/sys/syscallargs.h:int	compat_90_sys_getvfsstat(struct lwp *, const struct compat_90_sys_getvfsstat_args *, register_t *);
/usr/include/sys/syscallargs.h:int	sys___getvfsstat90(struct lwp *, const struct sys___getvfsstat90_args *, register_t *);

Also, I've made sure the code compiles with rustc 1.72.0 without warning or errors.

~> cargo build --release
    Updating crates.io index
   Compiling libc v0.2.148 (/home/pin/Git/libc)
    Finished release [optimized] target(s) in 8.87s

Moreover, the move to trash functionality has again been verified using simp compiled with this commit as patch, in combination with the patch submited to trash-rs.

@JohnTitor Please give bors another try

[rustbot]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @JohnTitor (or someone else) soon.

Please see the contribution instructions for more information. Namely, in order to ensure the minimum review times lag, PR authors and assigned reviewers should ensure that the review label (S-waiting-on-review and S-waiting-on-author) stays updated, invoking these commands when appropriate:

• @rustbot author: the review is finished, PR author should check the comments and take action accordingly
• @rustbot review: the author is ready for a review, this PR will be queued again in the reviewer's queue

[JohnTitor]

@bors r+

[bors]

📌 Commit bd3b68d has been approved by JohnTitor

It is now in the queue for this repository.

[bors]

⌛ Testing commit bd3b68d with merge 9f3c5bc...

[bors]

☀️ Test successful - checks-actions, checks-cirrus-freebsd-12, checks-cirrus-freebsd-13, checks-cirrus-freebsd-14
Approved by: JohnTitor
Pushing 9f3c5bc to main...