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man page of vfs_busy

vfs_busy: marks a mount point as busy


vfs_busy - marks a mount point as busy


#include <sys/param.h> #include <sys/mount.h> int vfs_busy(struct mount *mp, int flags);
The vfs_busy() function marks a mount point as busy by incrementing the reference count of a mount point. It also delays unmounting by sleeping on mp if the MNTK_UNMOUNT flag is set in mp->mnt_kern_flag and the MBF_NOWAIT flag is not set. Its arguments are: mp The mount point to busy. flags Flags controlling how vfs_busy() should act. MBF_NOWAIT do not sleep if MNTK_UNMOUNT is set. MBF_MNTLSTLOCK drop the mountlist_mtx in the critical path.
A 0 value is returned on success. If the mount point is being unmounted and MBF_NOWAIT flag is specified ENOENT will be returned.


[ENOENT] The mount point is being unmounted (MNTK_UNMOUNT is set).


This manual page was written by Chad David <davidc@acns.ab.ca>. VFS_BUSY(9)

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