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VFS_MOUNT(9)          DragonFly Kernel Developer's Manual         VFS_MOUNT(9)


NAME

     VFS_MOUNT -- mount a filesystem


SYNOPSIS

     #include <sys/param.h>
     #include <sys/mount.h>
     #include <sys/vnode.h>

     int
     VFS_MOUNT(struct mount *mp, char *path, caddr_t data,
         struct ucred *cred);


DESCRIPTION

     Mount a filesystem into the system's namespace.

     Its arguments are:

     mp    Structure representing the filesystem.

     path  Pathname where the filesystem is being mounted.

     data  Filesystem specific data.  This should be read into the kernel
           using copyin(9).

     cred  Pointer to a struct ucred for user credentials checking.

     This is called both to mount new filesystems and to change the attributes
     of an existing filesystem.  If the MNT_UPDATE flag is set in mp->mnt_flag
     then the filesystem should update its internal state from the value of
     mp->mnt_flag.  This can be used, for instance, to convert a read-only
     filesystem to read-write.  It is also used by mountd(8) to update the NFS
     export information for the filesystem.

     If the MNT_UPDATE flag is not specified, then this is a newly mounted
     filesystem.  The filesystem code should allocate and initialize any pri-
     vate data needed to represent the filesystem (it can use the mp->mnt_data
     field to store this information).


SEE ALSO

     VFS(9), vnode(9)


AUTHORS

     This man page was written by Doug Rabson.

DragonFly 3.5                  December 16, 2012                 DragonFly 3.5

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