stand: add fs_ops.fs_flag

To avoid a layering violation in open() allow fs_ops to
indicate that devopen() should be skipped.

This is only true for pkgfs.

Sponsored by: Juniper Networks, Inc.
Diffe

stand: add fs_ops.fs_flag

To avoid a layering violation in open() allow fs_ops to
indicate that devopen() should be skipped.

This is only true for pkgfs.

Sponsored by: Juniper Networks, Inc.
Differential Revision: https://reviews.freebsd.org/D51684

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libsa: Remove redundant sys/cdefs.h

Sponsored by: Netflix

Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

stand: Use c99 structure initialization for splitfs_fsops

Sponsored by: Netflix

stand: add fs_ops.fs_flag

To avoid a layering violation in open() allow fs_ops to
indicate that devopen() should be skipped.

This is only true for pkgfs.

Sponsored by: Juniper Networks, Inc.
Diffe

stand: add fs_ops.fs_flag

To avoid a layering violation in open() allow fs_ops to
indicate that devopen() should be skipped.

This is only true for pkgfs.

Sponsored by: Juniper Networks, Inc.
Differential Revision: https://reviews.freebsd.org/D51684

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libsa: Remove redundant sys/cdefs.h

Sponsored by: Netflix

Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

stand: Use c99 structure initialization for splitfs_fsops

Sponsored by: Netflix

Move sys/boot to stand. Fix all references to new location

Sponsored by: Netflix

Move lib/libstand to sys/boot/libsa

Move the sources to sys/boot. Make adjustments related to the
move. Kill LIBSTAND_SRC since it's no longer needed.

Sponsored by: Netflix

Remove unused variable. Shorten the path to WARNS=6 compliance.

Don't add integers to void pointers.

Clean up error handling in libstand filesystem code to be more consistent:
- bzipfs and gzipfs now properly return errno values directly from their
read routines rather than returning -1.
- missing

Clean up error handling in libstand filesystem code to be more consistent:
- bzipfs and gzipfs now properly return errno values directly from their
read routines rather than returning -1.
- missing errno values on error returns for the seek routines on almost
all filesystems were added.
- fstat() now returns -1 if an error occurs rather than ignoring it.
- nfs's readdir() routine now reports valid errno values if an error or
EOF occurs rather than EPERM (It was just returning 0 for success and
1 for failure).
- nullfs used the wrong semantics for every function besides close() and
seek(). Getting it right for close() appears to be an accident at that.
- read() for buffered files no longer returns 0 (EOF) if an error occurs,
but returns -1 instead.

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- Move the code to try to open a single chunk file and prompt for the
associated floppy if needed into a static split_openfile() function.
- Use this function in splitfs_open() to open the first ch

- Move the code to try to open a single chunk file and prompt for the
associated floppy if needed into a static split_openfile() function.
- Use this function in splitfs_open() to open the first chunk rather
than using open() directly. This allows the first chunk to be located
on a different disk than the actual foo.split file.

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Whitespace tweaks to make indentation consistent within this file and even
within a single function.

Kill debugging printf() slipped into my last commit.

Noticed by: jhb
Hall of shame entry: sobomax

Add splitfs vfs layer into libstand, which allows loading big kernels and
modules split across several physical medias. Following is how it works:

The splitfs code, when asked to open "foo" looks fo

Add splitfs vfs layer into libstand, which allows loading big kernels and
modules split across several physical medias. Following is how it works:

The splitfs code, when asked to open "foo" looks for a file "foo.split"
which is a text file containing a list of filenames and media names, e.g.

foo.aa "Kernel floppy 1"
foo.ab "Kernel floppy 2"
foo.ac "Kernel and modules floppy"

For each file segment, the process is:

- try to open the file
- prompt "Insert the disk labelled <whatever> and press any key..."
- try to open the file
- return error if file could not be located

RE team is free to use this feature in the upcoming 5.0-DP1.

Reviewed by: msmith, dcs

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