Konstantin Belousov f82360acf2 Existing VOP_VPTOCNP() interface has a fatal flow that is critical for ... nullfs. The problem is that resulting vnode is only required to be held on return from the successfull call to vop, instead of being referenced. Nullfs VOP_INACTIVE() method reclaims the vnode, which in combination with the VOP_VPTOCNP() interface means that the directory vnode returned from VOP_VPTOCNP() is reclaimed in advance, causing vn_fullpath() to error with EBADF or like. Change the interface for VOP_VPTOCNP(), now the dvp must be referenced. Convert all in-tree implementations of VOP_VPTOCNP(), which is trivial, because vhold(9) and vref(9) are similar in the locking prerequisites. Out-of-tree fs implementation of VOP_VPTOCNP(), if any, should have no trouble with the fix. Tested by: pho Reviewed by: mckusick MFC after: 3 weeks (subject of re approval)		2011-11-19 07:50:49 +00:00
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devfs.h	Format prototypes to follow style(9) more closely.	2010-10-12 15:58:52 +00:00
devfs_devs.c	Export devfs inode number allocator for the kernel consumers.	2011-10-05 16:50:15 +00:00
devfs_dir.c	Add reference counting for devfs paths containing user created symbolic	2010-09-27 17:47:09 +00:00
devfs_int.h	Format prototypes to follow style(9) more closely.	2010-10-12 15:58:52 +00:00
devfs_rule.c	- fix duplicate "a a" in some comments	2011-11-13 17:06:33 +00:00
devfs_vfsops.c	Enable shared lookups and externed shared ops for devfs.	2010-08-06 09:46:53 +00:00
devfs_vnops.c	Existing VOP_VPTOCNP() interface has a fatal flow that is critical for	2011-11-19 07:50:49 +00:00