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Diffstat (limited to 'fs/afs/mntpt.c')
-rw-r--r--fs/afs/mntpt.c106
1 files changed, 63 insertions, 43 deletions
diff --git a/fs/afs/mntpt.c b/fs/afs/mntpt.c
index ca3fa81b068a..08c11a0b66bd 100644
--- a/fs/afs/mntpt.c
+++ b/fs/afs/mntpt.c
@@ -18,10 +18,6 @@
#include <linux/mount.h>
#include <linux/namei.h>
#include <linux/mnt_namespace.h>
-#include "super.h"
-#include "cell.h"
-#include "volume.h"
-#include "vnode.h"
#include "internal.h"
@@ -30,6 +26,7 @@ static struct dentry *afs_mntpt_lookup(struct inode *dir,
struct nameidata *nd);
static int afs_mntpt_open(struct inode *inode, struct file *file);
static void *afs_mntpt_follow_link(struct dentry *dentry, struct nameidata *nd);
+static void afs_mntpt_expiry_timed_out(struct work_struct *work);
const struct file_operations afs_mntpt_file_operations = {
.open = afs_mntpt_open,
@@ -43,16 +40,9 @@ const struct inode_operations afs_mntpt_inode_operations = {
};
static LIST_HEAD(afs_vfsmounts);
+static DECLARE_DELAYED_WORK(afs_mntpt_expiry_timer, afs_mntpt_expiry_timed_out);
-static void afs_mntpt_expiry_timed_out(struct afs_timer *timer);
-
-struct afs_timer_ops afs_mntpt_expiry_timer_ops = {
- .timed_out = afs_mntpt_expiry_timed_out,
-};
-
-struct afs_timer afs_mntpt_expiry_timer;
-
-unsigned long afs_mntpt_expiry_timeout = 20;
+unsigned long afs_mntpt_expiry_timeout = 10 * 60;
/*
* check a symbolic link to see whether it actually encodes a mountpoint
@@ -84,7 +74,7 @@ int afs_mntpt_check_symlink(struct afs_vnode *vnode)
/* examine the symlink's contents */
size = vnode->status.size;
- _debug("symlink to %*.*s", size, (int) size, buf);
+ _debug("symlink to %*.*s", (int) size, (int) size, buf);
if (size > 2 &&
(buf[0] == '%' || buf[0] == '#') &&
@@ -92,7 +82,7 @@ int afs_mntpt_check_symlink(struct afs_vnode *vnode)
) {
_debug("symlink is a mountpoint");
spin_lock(&vnode->lock);
- vnode->flags |= AFS_VNODE_MOUNTPOINT;
+ set_bit(AFS_VNODE_MOUNTPOINT, &vnode->flags);
spin_unlock(&vnode->lock);
}
@@ -113,7 +103,7 @@ static struct dentry *afs_mntpt_lookup(struct inode *dir,
struct dentry *dentry,
struct nameidata *nd)
{
- kenter("%p,%p{%p{%s},%s}",
+ _enter("%p,%p{%p{%s},%s}",
dir,
dentry,
dentry->d_parent,
@@ -129,7 +119,7 @@ static struct dentry *afs_mntpt_lookup(struct inode *dir,
*/
static int afs_mntpt_open(struct inode *inode, struct file *file)
{
- kenter("%p,%p{%p{%s},%s}",
+ _enter("%p,%p{%p{%s},%s}",
inode, file,
file->f_path.dentry->d_parent,
file->f_path.dentry->d_parent ?
@@ -152,7 +142,7 @@ static struct vfsmount *afs_mntpt_do_automount(struct dentry *mntpt)
char *buf, *devname = NULL, *options = NULL;
int ret;
- kenter("{%s}", mntpt->d_name.name);
+ _enter("{%s}", mntpt->d_name.name);
BUG_ON(!mntpt->d_inode);
@@ -196,13 +186,13 @@ static struct vfsmount *afs_mntpt_do_automount(struct dentry *mntpt)
strcat(options, ",rwpath");
/* try and do the mount */
- kdebug("--- attempting mount %s -o %s ---", devname, options);
+ _debug("--- attempting mount %s -o %s ---", devname, options);
mnt = vfs_kern_mount(&afs_fs_type, 0, devname, options);
- kdebug("--- mount result %p ---", mnt);
+ _debug("--- mount result %p ---", mnt);
free_page((unsigned long) devname);
free_page((unsigned long) options);
- kleave(" = %p", mnt);
+ _leave(" = %p", mnt);
return mnt;
error:
@@ -212,7 +202,7 @@ error:
free_page((unsigned long) devname);
if (options)
free_page((unsigned long) options);
- kleave(" = %d", ret);
+ _leave(" = %d", ret);
return ERR_PTR(ret);
}
@@ -222,51 +212,81 @@ error:
static void *afs_mntpt_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct vfsmount *newmnt;
- struct dentry *old_dentry;
int err;
- kenter("%p{%s},{%s:%p{%s}}",
+ _enter("%p{%s},{%s:%p{%s}}",
dentry,
dentry->d_name.name,
nd->mnt->mnt_devname,
dentry,
nd->dentry->d_name.name);
- newmnt = afs_mntpt_do_automount(dentry);
+ dput(nd->dentry);
+ nd->dentry = dget(dentry);
+
+ newmnt = afs_mntpt_do_automount(nd->dentry);
if (IS_ERR(newmnt)) {
path_release(nd);
return (void *)newmnt;
}
- old_dentry = nd->dentry;
- nd->dentry = dentry;
- err = do_add_mount(newmnt, nd, 0, &afs_vfsmounts);
- nd->dentry = old_dentry;
-
- path_release(nd);
-
- if (!err) {
- mntget(newmnt);
+ mntget(newmnt);
+ err = do_add_mount(newmnt, nd, MNT_SHRINKABLE, &afs_vfsmounts);
+ switch (err) {
+ case 0:
+ path_release(nd);
nd->mnt = newmnt;
- dget(newmnt->mnt_root);
- nd->dentry = newmnt->mnt_root;
+ nd->dentry = dget(newmnt->mnt_root);
+ schedule_delayed_work(&afs_mntpt_expiry_timer,
+ afs_mntpt_expiry_timeout * HZ);
+ break;
+ case -EBUSY:
+ /* someone else made a mount here whilst we were busy */
+ while (d_mountpoint(nd->dentry) &&
+ follow_down(&nd->mnt, &nd->dentry))
+ ;
+ err = 0;
+ default:
+ mntput(newmnt);
+ break;
}
- kleave(" = %d", err);
+ _leave(" = %d", err);
return ERR_PTR(err);
}
/*
* handle mountpoint expiry timer going off
*/
-static void afs_mntpt_expiry_timed_out(struct afs_timer *timer)
+static void afs_mntpt_expiry_timed_out(struct work_struct *work)
{
- kenter("");
+ _enter("");
+
+ if (!list_empty(&afs_vfsmounts)) {
+ mark_mounts_for_expiry(&afs_vfsmounts);
+ schedule_delayed_work(&afs_mntpt_expiry_timer,
+ afs_mntpt_expiry_timeout * HZ);
+ }
+
+ _leave("");
+}
- mark_mounts_for_expiry(&afs_vfsmounts);
+/*
+ * kill the AFS mountpoint timer if it's still running
+ */
+void afs_mntpt_kill_timer(void)
+{
+ _enter("");
- afs_kafstimod_add_timer(&afs_mntpt_expiry_timer,
- afs_mntpt_expiry_timeout * HZ);
+ ASSERT(list_empty(&afs_vfsmounts));
+ cancel_delayed_work(&afs_mntpt_expiry_timer);
+ flush_scheduled_work();
+}
- kleave("");
+/*
+ * begin unmount by attempting to remove all automounted mountpoints we added
+ */
+void afs_umount_begin(struct vfsmount *vfsmnt, int flags)
+{
+ shrink_submounts(vfsmnt, &afs_vfsmounts);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 14:20:53 +0000