manu 96c935e33b Add a mutex for operations that touch size (setattr, getattr, write, fsync). ... This is required to avoid data corruption bugs, where a getattr slices itself within a setattr operation, and sets the size to the stall value it got from the filesystem. That value is smaller than the one set by setattr, and the call to uvm_vnp_setsize() trigged a spurious truncate. The result is a chunk of zeroed data in the file. Such a situation can easily happen when the ioflush thread issue a VOP_FSYNC/puffs_vnop_sync/flushvncache/dosetattrn while andother process do a sys_stat/VOP_GETATTR/puffs_vnop_getattr. This mutex on size operation can be removed the day we decide VOP_GETATTR has to operated on a locked vnode, since the other operations that touch size already require that.		2011-08-29 04:12:45 +00:00
..
files.puffs	remember to add the new file to the build	2010-07-06 16:13:57 +00:00
Makefile
puffs_compat.c	Do fhtovp compat translation only for fhtovp ops, not all vfs ops.	2010-07-11 11:17:27 +00:00
puffs_msgif.c	avoid some uninitialised variable warnings from GCC.	2011-07-03 08:57:43 +00:00
puffs_msgif.h	Add a flag to VOP_LISTEXTATTR(9) so that the vnode interface can tell the	2011-07-04 08:07:29 +00:00
puffs_node.c	Add a mutex for operations that touch size (setattr, getattr, write, fsync).	2011-08-29 04:12:45 +00:00
puffs_subr.c
puffs_sys.h	Add a mutex for operations that touch size (setattr, getattr, write, fsync).	2011-08-29 04:12:45 +00:00
puffs_vfsops.c	Welcome to 5.99.53! Merge rmind-uvmplock branch:	2011-06-12 03:35:36 +00:00
puffs_vnops.c	Add a mutex for operations that touch size (setattr, getattr, write, fsync).	2011-08-29 04:12:45 +00:00
TODO