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hannken 1b9c6382e3 New file system suspension API to replace vn_start_write and vn_finished_write. 
The suspension helpers are now put into file system specific operations.
This means every file system not supporting these helpers cannot be suspended
and therefore snapshots are no longer possible.

Implemented for file systems of type ffs.

The new API is enabled on a kernel option NEWVNGATE.  This option is
not enabled by default in any kernel config.

Presented and discussed on tech-kern with much input from
Bill Studenmund <wrstuden@netbsd.org> and YAMAMOTO Takashi <yamt@netbsd.org>.

Welcome to 4.99.9 (new vfs op vfs_suspendctl).
 		2007-01-19 14:49:08 +00:00
..
ext2fs New file system suspension API to replace vn_start_write and vn_finished_write. 2007-01-19 14:49:08 +00:00
ffs New file system suspension API to replace vn_start_write and vn_finished_write. 2007-01-19 14:49:08 +00:00
lfs New file system suspension API to replace vn_start_write and vn_finished_write. 2007-01-19 14:49:08 +00:00
mfs New file system suspension API to replace vn_start_write and vn_finished_write. 2007-01-19 14:49:08 +00:00
ufs New file system suspension API to replace vn_start_write and vn_finished_write. 2007-01-19 14:49:08 +00:00
Makefile
…
files.ufs Let ext2fs be built even when none of ffs, lfs and mfs are present. 2006-11-13 16:12:54 +00:00