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From NetBSD.
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fstatfs(2), and getfsstat(2) so you will need to build a new kernel
before doing a "make build" or you will get "unimplemented syscall" errors.
The new struct statfs has the following featuires:
o Has a u_int32_t flags field--now softdep can have a real flag.
o Uses u_int32_t instead of longs (nicer on the alpha). Note: the man
page used to lie about setting invalid/unused fields to -1. SunOS does
that but our code never has.
o Gets rid of f_type completely. It hasn't been used since NetBSD 0.9
and having it there but always 0 is confusing. It is conceivable
that this may cause some old code to not compile but that is better
than silently breaking.
o Adds a mount_info union that contains the FSTYPE_args struct. This
means that "mount" can now tell you all the options a filesystem was
mounted with. This is especially nice for NFS.
Other changes:
o The linux statfs emulation didn't convert between BSD fs names
and linux f_type numbers. Now it does, since the BSD f_type
number is useless to linux apps (and has been removed anyway)
o FreeBSD's struct statfs is different from our (both old and new)
and thus needs conversion. Previously, the OpenBSD syscalls
were used without any real translation.
o mount(8) will now show extra info when invoked with no arguments.
However, to see *everything* you need to use the -v (verbose) flag.
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same as is used in 'vslock()'. The situation when this occurs is when a
process tries to read or write to another process vm space and the _segment_
referenced have not yet been mapped. A certain way of crashing a system is
to debug a program larger than 4 Mb (yes, those critters exist!). Set a break
in an address above 4 Mb and pmap_enter panics because it can't fault in a
new ptd page since it is not the process itself that calls pmap_enter.
This is a fix, not a solution, but at least a user can't crash the kernel.
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to be vop_generic_revoke, vop_generic_bwrite, vop_generic_islocked,
vop_generic_lock and vop_generic_unlock.
Create vop_generic_abortop and propogate change to all file systems.
Fix PR/371.
Get rid of locking in NULLFS (should be mostly unnecessary now except for
forced unmounts).
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From Alan Barrett <apb@iafrica.com> with some changes.
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Fix a reversed argument which caused procfs_checkioperm() to always
return OK". Add a few comments to avoid further confusion.
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2) Fix procfs security hole. This is basically the NetBSD fix
(which is based in part on Sean Eric Fagan's FreeBSD fix)
with a few minor changes. The change creates as function,
procfs_checkioperm(), that has check numbers 3 and 4 from sys_ptrace().
3) Make procfs_control() use procfs_checkioperm() as well (it
already had the same basic checks but some of them were incorrect).
4) Minor stylistic cleanups, including the use of the SET/CLR/ISSET
macros to aid general grokability.
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Eliminate bogus uses of V{READ,WRITE,EXEC}. Use S_I[RWX]{USR,GRP,OTH}
where appropriate.
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not neccecary (and actually caused some problems).
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discovered that I had commited a bunch of nonfunctional changes Theo
had made, but not debugged. This undoes both my changes, and Theo's.
When this code is functional, it will be put back in.
Thank you for pointing this out to me David Mazieres.
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without having to peg the system at securelevel -1.
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$OpenBSD$ additions.
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ericj
jasoni
assar
csapuntz
deraadt
millert
art
pefo
tholo
niklas
bitblt
mickey