diff options
Diffstat (limited to 'sys/kern/vfs_vnops.c')
| -rw-r--r-- | sys/kern/vfs_vnops.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c index f1400f5..45d3490 100644 --- a/sys/kern/vfs_vnops.c +++ b/sys/kern/vfs_vnops.c @@ -1830,6 +1830,37 @@ vfs_write_resume(struct mount *mp, int flags) } /* + * Helper loop around vfs_write_suspend() for filesystem unmount VFS + * methods. + */ +int +vfs_write_suspend_umnt(struct mount *mp) +{ + int error; + + KASSERT((curthread->td_pflags & TDP_IGNSUSP) == 0, + ("vfs_write_suspend_umnt: recursed")); + + /* dounmount() already called vn_start_write(). */ + for (;;) { + vn_finished_write(mp); + error = vfs_write_suspend(mp, 0); + if (error != 0) + return (error); + MNT_ILOCK(mp); + if ((mp->mnt_kern_flag & MNTK_SUSPENDED) != 0) + break; + MNT_IUNLOCK(mp); + vn_start_write(NULL, &mp, V_WAIT); + } + mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | MNTK_SUSPEND2); + wakeup(&mp->mnt_flag); + MNT_IUNLOCK(mp); + curthread->td_pflags |= TDP_IGNSUSP; + return (0); +} + +/* * Implement kqueues for files by translating it to vnode operation. */ static int |
