. libc: add vfs_mmap, a way for vfs to initiate mmap()s.
This is a good special case to have as vfs is a slightly
different client from regular user processes. It doesn't do it
for itself, and has the dev & inode info already so the callback
to VFS for the lookup isn't necessary. So it has different info
to have to give to VM.
. libc: also add minix_mmap64() that accepts a 64-bit offset, even
though our off_t is still 32 bit now.
. On exec() time, try to mmap() in the executable if available.
(It is not yet available in this commit.)
. To support mmap(), add do_vm_call that allows VM to lookup
(to ino+dev), do i/o from and close FD's on behalf of other
processes.
Change-Id: I831551e45a6781c74313c450eb9c967a68505932
Omap timers remove hardcoded base address and add some initial
support for the beaglebone's timers. Frclock_util will need
refactoring to remain independent of the ARM flavour.
Change-Id: I2b5d04e930364262c81b5686de634c0a51796b23
kernel: stop gathering timestamps once the bin is full per interrupt
random: once seeded, retrieve new entropy at a lower rate
Change-Id: I4ce6081d39274728d82c6889686d1650cfd5fc2e
. add receive hooks in the kernel to print asynchronously
delivered messages
. do not rely on MF_REPLY_PEND to decide between calls and errors,
as that isn't reliable for asynchronous messages; try both instead
. add _sendcall() that extract-mfield.sh can then reliably recognize
the fields for messages that are sent with just send()
. add DEBUG_DUMPIPC_NAMES to restrict printed messages to
from/to given process names
Change-Id: Ia65eb02a69a2b58e73bf9f009987be06dda774a3
libminixfs may now be informed of changes to the block usage on the
filesystem. if the net change becomes big enough, libminixfs may
resize the cache based on the new usage.
. update the 2 FSes to provide this information to libminixfs
Change-Id: I158815a11da801fd5572a8de89c9e6c039b82650
This commit introduces a new request type called REQ_BPEEK. It
requests minor device blocks from the FS. Analogously to REQ_PEEK,
it requests the filesystem to get the requested blocks into its
cache, without actually copying the result anywhere.
Change-Id: If1d06645b0e17553a64b3167091e9d12efeb3d6f
In libexec, split the memory allocation method into cleared and
non-cleared. Cleared gives zeroed memory, non-cleared gives 'junk'
memory (that will be overwritten anyway, and so needn't be cleared)
that is faster to get.
Also introduce the 'memmap' method that can be used, if available,
to map code and data from executables into a process using the
third-party mmap() mode.
Change-Id: I26694fd3c21deb8b97e01ed675dfc14719b0672b
Primary purpose of change: to support the mmap implementation, VM must
know both (a) about some block metadata for FS cache blocks, i.e.
inode numbers and inode offsets where applicable; and (b) know about
*all* cache blocks, i.e. also of the FS primary caches and not just
the blocks that spill into the secondary one. This changes the
interface and VM data structures.
This change is only for the interface (libminixfs) and VM data
structures; the filesystem code is unmodified, so although the
secondary cache will be used as normal, blocks will not be annotated
with inode information until the FS is modified to provide this
information. Until it is modified, mmap of files will fail gracefully
on such filesystems.
This is indicated to VFS/VM by returning ENOSYS for REQ_PEEK.
Change-Id: I1d2df6c485e6c5e89eb28d9055076cc02629594e
Some (backwards-compatible) changes in mmap() call message fields
that allow for a 64-bit offset. minix_mmap() takes an off_t and
minix_mmap64() takes a u64_t. Some mmap() work in VM goes into a
separate function, using the new fields, so that that can be re-used
when files are to be mapped (future commit).
Change-Id: Ifb77a90b593dd3c33cf81b396068e4da1ec5fb1c
This commit removes the secondary cache code implementation from
VM and its usage from libminixfs. It is to be replaced by a new
implementation.
Change-Id: I8fa3af06330e7604c7e0dd4cbe39d3ce353a05b1
. test70: regression test for m_out vfs race condition
The following tests use testcache.c to generate test i/o
patterns, generate random write data and verify the reads.
. test71: blackbox full-stack test of FS operation, testing
using the regular VFS interface crazy i/o patterns
with various working set sizes, triggering only
primary cache, also secondary cache, and finally
disk i/o and verifying contents all the time
. test72: unit test of libminixfs, implementing
functions it needs from -lsys and -lblockdriver
and the client in order to simulate a working
cache client and backend environment.
. test73: blackbox test of secondary vm cache in isolation
Change-Id: I1287e9753182b8719e634917ad158e3c1e079ceb
Variant of utime(2) with struct timespec (with ns precision)
instead of time_t values; also allows for tv_nsec members
the values UTIME_NOW (force update to current time) or
UTIME_OMIT (allow to set either atim or mtim independently.)
Provides a superset of utimes(2), futimes(2), lutimes(2),
and futimens(2).
Provides the same subset of utimensat(2) as does NetBSD 6.
Also import utimens() and lutimeNS() from NetBSD-current.
This also adds the sys_settime() kernel call which allows for the adjusting
of the clock named realtime in the kernel. The existing sys_stime()
function is still needed for a separate job (setting the boottime). The
boottime is set in the readclock driver. The sys_settime() interface is
meant to be flexible and will support both clock_settime() and adjtime()
when adjtime() is implemented later.
settimeofday() was adjusted to use the clock_settime() interface.
One side note discovered during testing: uptime(1) (part of the last(1)),
uses wtmp to determine boottime (not Minix's times(2)). This leads `uptime`
to report odd results when you set the time to a time prior to boottime.
This isn't a new bug introduced by my changes. It's been there for a while.
In order to make it more clear that ticks should be used for timers
and realtime should be used for timestamps / displaying the date/time,
getuptime() was renamed to getticks() and getuptime2() was renamed to
getuptime().
Servers, drivers, libraries, tests, etc that use getuptime()/getuptime2()
have been updated. In instances where a realtime was calculated, the
calculation was changed to use realtime.
System calls clock_getres() and clock_gettime() were added to PM/libc.
Do not hardcode warning and optimisation flags, otherwise the
main options (i.e. DBG, CPPFLAGS) will not work as expected.
You can still provide specific default by using DBG?=<value>.
Doing so leaves the opportunity to override the setting from the
commandline, while the default value from the build system is
then ignored for that particular package.
When crosscompiling, and using build.sh, adding -V DBG=<value> has
this same effect as make DBG=<value>.
Change-Id: Ic610e4d33b945acad64571e1431f1814291e2d84
REQ_PEEK behaves just like REQ_READ except that it does not copy
data anywhere, just obtains the blocks from the FS into the cache.
To be used by the future mmap implementation.
Change-Id: I1b56de304f0a7152b69a72c8962d04258adb44f9
Remove old versions of system calls and system calls that don't have
a libc api interface anymore (dup, dup2, creat).
VFS still contains support for old system call numbers for the new stat
system calls (i.e., 65, 66, 67) to keep supporting old binaries built for
MINIX 3.2.1 (prior to the release).
Change-Id: I721779b58a50c7eeae20669de24658d55d69b25b
Make the frclock functions similar to the tsc utility functions. This
way, we can call frclock functions from the framebuffer driver which
will use frclock on ARM and tsc on X86.
Also, frclock_64_to_micros computed seconds, not microseconds
Change-Id: I6718ae0fb7db050794f6f032205923e1a32dc1ac
. ldivmod, uldivmod were passing the modulo argument pointer
in R4, which is bogus, as qdivrem expects it on the stack as
per the EABI, causing essentially 'random' memory to be trampled
by qdivrem. fix by pushing R4 before the call.
. also add these functions to -minc so -lminc clients can be
linked without -lgcc
Change-Id: I90b0b28b51a188c93da5de6afb108224749ea794
