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Platform code differences (view source)
Revision as of 00:41, 9 September 2013
, 00:41, 9 September 2013no edit summary
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* [https://github.com/zfsonlinux/spl/commit/46a75aadb7c08085a4ad2e55dcf5b6fb387c1253 cv_wait_io()] | * [https://github.com/zfsonlinux/spl/commit/46a75aadb7c08085a4ad2e55dcf5b6fb387c1253 cv_wait_io()] | ||
** Compatibility layer extension to hook into Linux's I/O time accounting infrastructure. Otherwise identical to cv_wait(). | ** Compatibility layer extension to hook into Linux's I/O time accounting infrastructure. Otherwise identical to cv_wait(). | ||
= osxzfs = | |||
* Mostly based on ZFSOnLinux source tree | |||
* Uses ZFSOnLinux autoconf | |||
* Prefers clang or llvm-gcc for kernel module | |||
* IOKit kernel module requires C++ (strip Linux's variables named ''private'') | |||
* All UIO operations are kernel API calls. (uio_create() / uio_setoffset() ... ) the struct is opaque | |||
* zfs_vnops.c, zfs_vfops.c, zfs_acl.c, zfs_znode.c, zfs_fuid.c are FreeBSD based with OSX wrappers in zfs_vnops_osx.c | |||
* '''vnode_t''' is defined as '''struct vnode *''' on OSX, so most variables are now defined as '''struct vnode *vp''' | |||
* All vnode operations have API calls (vnode_fsnode(vp) == vp->v_data). the struct is opaque | |||
* zvols are mostly untouched from FreeBSD, but calls wrappers to IOKit C++ layer | |||
* '''vnode_create''' needs ALL information at call time (vtype, private ptr (znode), vnode_ops), can not pre-alloc like FreeBSD | |||
** '''vnode_create''' can call both '''reclaim''' and '''fdsync''' causing locking issues. OSX port has a reclaim thread to defer reclaims. | |||