diff options
Diffstat (limited to 'sys/miscfs/devfs/devfs_vfsops.c')
| -rw-r--r-- | sys/miscfs/devfs/devfs_vfsops.c | 58 |
1 files changed, 56 insertions, 2 deletions
diff --git a/sys/miscfs/devfs/devfs_vfsops.c b/sys/miscfs/devfs/devfs_vfsops.c index b752e195f9e3..39ba47317e75 100644 --- a/sys/miscfs/devfs/devfs_vfsops.c +++ b/sys/miscfs/devfs/devfs_vfsops.c @@ -1,7 +1,7 @@ /* * Written by Julian Elischer (julian@DIALix.oz.au) * - * $Header: /home/ncvs/src/sys/miscfs/devfs/devfs_vfsops.c,v 1.13 1996/06/15 20:37:22 gpalmer Exp $ + * $Header: /home/ncvs/src/sys/miscfs/devfs/devfs_vfsops.c,v 1.14 1996/09/10 08:27:35 bde Exp $ * * */ @@ -210,11 +210,65 @@ DBPRINT(("statfs ")); return 0; } +/* + * Go through the disk queues to initiate sandbagged IO; + * go through the inodes to write those that have been modified; + * initiate the writing of the super block if it has been modified. + * + * Note: we are always called with the filesystem marked `MPBUSY'. + */ static int devfs_sync(struct mount *mp, int waitfor,struct ucred *cred,struct proc *p) { + register struct vnode *vp, *nvp; + struct timeval tv; + int error, allerror = 0; + DBPRINT(("sync ")); - return 0; + + /* + * Write back modified superblock. + * Consistency check that the superblock + * is still in the buffer cache. + */ + /* + * Write back each (modified) inode. + */ +loop: + for (vp = mp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) { + /* + * If the vnode that we are about to sync is no longer + * associated with this mount point, start over. + */ + if (vp->v_mount != mp) + goto loop; + nvp = vp->v_mntvnodes.le_next; + if (VOP_ISLOCKED(vp)) + continue; + if ( vp->v_dirtyblkhd.lh_first == NULL) + continue; + if (vp->v_type == VBLK) { + if (vget(vp, 1)) + goto loop; + error = VOP_FSYNC(vp, cred, waitfor, p); +printf("syncing device\n"); + if (error) + allerror = error; + vput(vp); + } +#ifdef NOTYET + else { + tv = time; + /* VOP_UPDATE(vp, &tv, &tv, waitfor == MNT_WAIT); */ + VOP_UPDATE(vp, &tv, &tv, 0); + } +#endif + } + /* + * Force stale file system control information to be flushed. + *( except that htat makes no sense with devfs + */ + return (allerror); } static int |