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Move the checkdirs() function from vfs_mount.c to kern_descrip.c and

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call it mountcheckdirs().
This commit is contained in:
Poul-Henning Kamp 2004-12-14 08:23:18 +00:00
parent e0d32af754
commit 12b18fdab4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=138835
3 changed files with 52 additions and 52 deletions
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48
sys/kern/kern_descrip.c
View File

@ -2256,6 +2256,54 @@ dupfdopen(struct thread *td, struct filedesc *fdp, int indx, int dfd, int mode,
/* NOTREACHED */
}
/*
* Scan all active processes to see if any of them have a current
* or root directory of `olddp'. If so, replace them with the new
* mount point.
*/
void
mountcheckdirs(olddp, newdp)
struct vnode *olddp, *newdp;
{
struct filedesc *fdp;
struct proc *p;
int nrele;
if (vrefcnt(olddp) == 1)
return;
sx_slock(&allproc_lock);
LIST_FOREACH(p, &allproc, p_list) {
mtx_lock(&fdesc_mtx);
fdp = p->p_fd;
if (fdp == NULL) {
mtx_unlock(&fdesc_mtx);
continue;
}
nrele = 0;
FILEDESC_LOCK_FAST(fdp);
if (fdp->fd_cdir == olddp) {
vref(newdp);
fdp->fd_cdir = newdp;
nrele++;
}
if (fdp->fd_rdir == olddp) {
vref(newdp);
fdp->fd_rdir = newdp;
nrele++;
}
FILEDESC_UNLOCK_FAST(fdp);
mtx_unlock(&fdesc_mtx);
while (nrele--)
vrele(olddp);
}
sx_sunlock(&allproc_lock);
if (rootvnode == olddp) {
vrele(rootvnode);
vref(newdp);
rootvnode = newdp;
}
}
struct filedesc_to_leader *
filedesc_to_leader_alloc(struct filedesc_to_leader *old, struct filedesc *fdp, struct proc *leader)
{

55
sys/kern/vfs_mount.c
View File

@ -73,7 +73,6 @@ __FBSDID("$FreeBSD$");
#define ROOTNAME "root_device"
#define VFS_MOUNTARG_SIZE_MAX (1024 * 64)
static void checkdirs(struct vnode *olddp, struct vnode *newdp);
static void gets(char *cp);
static int vfs_domount(struct thread *td, const char *fstype,
char *fspath, int fsflags, void *fsdata);
@ -784,7 +783,7 @@ vfs_domount(
vfs_event_signal(NULL, VQ_MOUNT, 0);
if (VFS_ROOT(mp, &newdp, td))
panic("mount: lost mount");
checkdirs(vp, newdp);
mountcheckdirs(vp, newdp);
vput(newdp);
VOP_UNLOCK(vp, 0, td);
if ((mp->mnt_flag & MNT_RDONLY) == 0)
@ -802,54 +801,6 @@ vfs_domount(
return (error);
}
/*
* Scan all active processes to see if any of them have a current
* or root directory of `olddp'. If so, replace them with the new
* mount point.
*/
static void
checkdirs(olddp, newdp)
struct vnode *olddp, *newdp;
{
struct filedesc *fdp;
struct proc *p;
int nrele;
if (vrefcnt(olddp) == 1)
return;
sx_slock(&allproc_lock);
LIST_FOREACH(p, &allproc, p_list) {
mtx_lock(&fdesc_mtx);
fdp = p->p_fd;
if (fdp == NULL) {
mtx_unlock(&fdesc_mtx);
continue;
}
nrele = 0;
FILEDESC_LOCK_FAST(fdp);
if (fdp->fd_cdir == olddp) {
vref(newdp);
fdp->fd_cdir = newdp;
nrele++;
}
if (fdp->fd_rdir == olddp) {
vref(newdp);
fdp->fd_rdir = newdp;
nrele++;
}
FILEDESC_UNLOCK_FAST(fdp);
mtx_unlock(&fdesc_mtx);
while (nrele--)
vrele(olddp);
}
sx_sunlock(&allproc_lock);
if (rootvnode == olddp) {
vrele(rootvnode);
vref(newdp);
rootvnode = newdp;
}
}
/*
* ---------------------------------------------------------------------
* Unmount a filesystem.
@ -991,7 +942,7 @@ dounmount(mp, flags, td)
*/
if ((flags & MNT_FORCE) && VFS_ROOT(mp, &fsrootvp, td) == 0) {
if (mp->mnt_vnodecovered != NULL)
checkdirs(fsrootvp, mp->mnt_vnodecovered);
mountcheckdirs(fsrootvp, mp->mnt_vnodecovered);
if (fsrootvp == rootvnode) {
vrele(rootvnode);
rootvnode = NULL;
@ -1008,7 +959,7 @@ dounmount(mp, flags, td)
/* Undo cdir/rdir and rootvnode changes made above. */
if ((flags & MNT_FORCE) && VFS_ROOT(mp, &fsrootvp, td) == 0) {
if (mp->mnt_vnodecovered != NULL)
checkdirs(mp->mnt_vnodecovered, fsrootvp);
mountcheckdirs(mp->mnt_vnodecovered, fsrootvp);
if (rootvnode == NULL) {
rootvnode = fsrootvp;
vref(rootvnode);

1
sys/sys/filedesc.h
View File

@ -172,6 +172,7 @@ struct filedesc_to_leader *
filedesc_to_leader_alloc(struct filedesc_to_leader *old,
struct filedesc *fdp, struct proc *leader);
int getvnode(struct filedesc *fdp, int fd, struct file **fpp);
void mountcheckdirs(struct vnode *olddp, struct vnode *newdp);
void setugidsafety(struct thread *td);
static __inline struct file *