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| author | Edward Tomasz Napierala <trasz@FreeBSD.org> | 2016-07-07 09:03:57 +0000 |
|---|---|---|
| committer | Edward Tomasz Napierala <trasz@FreeBSD.org> | 2016-07-07 09:03:57 +0000 |
| commit | debc480e037b7337cc27dd1200d64ac55eea0644 (patch) | |
| tree | 595990c3c63580feac383e70c62f36197568ff07 /sys/sys | |
| parent | af625dc998ce3224c05ce266562da7a33904ac2e (diff) | |
| download | src-debc480e037b7337cc27dd1200d64ac55eea0644.tar.gz src-debc480e037b7337cc27dd1200d64ac55eea0644.zip | |
Add new unmount(2) flag, MNT_NONBUSY, to check whether there are
any open vnodes before proceeding. Make autounmound(8) use this flag.
Without it, even an unsuccessfull unmount causes filesystem flush,
which interferes with normal operation.
Reviewed by: kib@
Approved by: re (gjb@)
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D7047
Notes
Notes:
svn path=/head/; revision=302388
Diffstat (limited to 'sys/sys')
| -rw-r--r-- | sys/sys/mount.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/sys/sys/mount.h b/sys/sys/mount.h index 5438140dc365..7c2856ab2c32 100644 --- a/sys/sys/mount.h +++ b/sys/sys/mount.h @@ -312,17 +312,21 @@ void __mnt_vnode_markerfree_active(struct vnode **mvp, struct mount *); * External filesystem command modifier flags. * Unmount can use the MNT_FORCE flag. * XXX: These are not STATES and really should be somewhere else. - * XXX: MNT_BYFSID collides with MNT_ACLS, but because MNT_ACLS is only used for - * mount(2) and MNT_BYFSID is only used for unmount(2) it's harmless. + * XXX: MNT_BYFSID and MNT_NONBUSY collide with MNT_ACLS and MNT_MULTILABEL, + * but because MNT_ACLS and MNT_MULTILABEL are only used for mount(2), + * and MNT_BYFSID and MNT_NONBUSY are only used for unmount(2), + * it's harmless. */ #define MNT_UPDATE 0x0000000000010000ULL /* not real mount, just update */ #define MNT_DELEXPORT 0x0000000000020000ULL /* delete export host lists */ #define MNT_RELOAD 0x0000000000040000ULL /* reload filesystem data */ #define MNT_FORCE 0x0000000000080000ULL /* force unmount or readonly */ #define MNT_SNAPSHOT 0x0000000001000000ULL /* snapshot the filesystem */ +#define MNT_NONBUSY 0x0000000004000000ULL /* check vnode use counts. */ #define MNT_BYFSID 0x0000000008000000ULL /* specify filesystem by ID. */ #define MNT_CMDFLAGS (MNT_UPDATE | MNT_DELEXPORT | MNT_RELOAD | \ - MNT_FORCE | MNT_SNAPSHOT | MNT_BYFSID) + MNT_FORCE | MNT_SNAPSHOT | MNT_NONBUSY | \ + MNT_BYFSID) /* * Internal filesystem control flags stored in mnt_kern_flag. * |