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Correct condition to detect mount(2) support by a filesystem.

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Reported and tested by:	cy
Sponsored by:	The FreeBSD Foundation
Approved by:	re (rgrimes)
This commit is contained in:
Konstantin Belousov 2018-10-24 19:40:09 +00:00
parent 61ac1e28cc
commit 4fceda6206
1 changed files with 4 additions and 2 deletions
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6
sys/kern/vfs_mount.c
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@ -808,8 +808,10 @@ sys_mount(struct thread *td, struct mount_args *uap)
free(fstype, M_TEMP);
if (vfsp == NULL)
return (ENOENT);
if (vfsp->vfc_vfsops->vfs_cmount == NULL || ((vfsp->vfc_flags &
VFCF_SBDRY) != 0 && (vfsp->vfc_vfsops_sd->vfs_cmount == NULL)))
if (((vfsp->vfc_flags & VFCF_SBDRY) != 0 &&
vfsp->vfc_vfsops_sd->vfs_cmount == NULL) ||
((vfsp->vfc_flags & VFCF_SBDRY) == 0 &&
vfsp->vfc_vfsops->vfs_cmount == NULL))
return (EOPNOTSUPP);
ma = mount_argsu(ma, "fstype", uap->type, MFSNAMELEN);