#include <linux/pagemap.h>
#include <linux/slab.h>
#include <linux/file.h>
-#include <linux/mount.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/parser.h>
#include <linux/statfs.h>
+#include <linux/random.h>
MODULE_AUTHOR("Miklos Szeredi <miklos@szeredi.hu>");
MODULE_DESCRIPTION("Filesystem in Userspace");
MODULE_LICENSE("GPL");
static kmem_cache_t *fuse_inode_cachep;
-static struct subsystem connections_subsys;
-
-struct fuse_conn_attr {
- struct attribute attr;
- ssize_t (*show)(struct fuse_conn *, char *);
- ssize_t (*store)(struct fuse_conn *, const char *, size_t);
-};
+struct list_head fuse_conn_list;
+DEFINE_MUTEX(fuse_mutex);
#define FUSE_SUPER_MAGIC 0x65735546
return NULL;
fi = get_fuse_inode(inode);
- fi->i_time = jiffies - 1;
+ fi->i_time = 0;
fi->nodeid = 0;
fi->nlookup = 0;
fi->forget_req = fuse_request_alloc();
}
}
+static int fuse_remount_fs(struct super_block *sb, int *flags, char *data)
+{
+ if (*flags & MS_MANDLOCK)
+ return -EINVAL;
+
+ return 0;
+}
+
void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr)
{
if (S_ISREG(inode->i_mode) && i_size_read(inode) != attr->size)
return inode;
}
-static void fuse_umount_begin(struct super_block *sb)
+static void fuse_umount_begin(struct vfsmount *vfsmnt, int flags)
{
- fuse_abort_conn(get_fuse_conn_super(sb));
+ if (flags & MNT_FORCE)
+ fuse_abort_conn(get_fuse_conn_super(vfsmnt->mnt_sb));
}
static void fuse_put_super(struct super_block *sb)
{
struct fuse_conn *fc = get_fuse_conn_super(sb);
- down_write(&fc->sbput_sem);
- while (!list_empty(&fc->background))
- fuse_release_background(fc,
- list_entry(fc->background.next,
- struct fuse_req, bg_entry));
-
spin_lock(&fc->lock);
- fc->mounted = 0;
fc->connected = 0;
+ fc->blocked = 0;
spin_unlock(&fc->lock);
- up_write(&fc->sbput_sem);
/* Flush all readers on this fs */
kill_fasync(&fc->fasync, SIGIO, POLL_IN);
wake_up_all(&fc->waitq);
- kobject_del(&fc->kobj);
- kobject_put(&fc->kobj);
+ wake_up_all(&fc->blocked_waitq);
+ mutex_lock(&fuse_mutex);
+ list_del(&fc->entry);
+ fuse_ctl_remove_conn(fc);
+ mutex_unlock(&fuse_mutex);
+ fuse_conn_put(fc);
}
static void convert_fuse_statfs(struct kstatfs *stbuf, struct fuse_kstatfs *attr)
/* fsid is left zero */
}
-static int fuse_statfs(struct super_block *sb, struct kstatfs *buf)
+static int fuse_statfs(struct dentry *dentry, struct kstatfs *buf)
{
+ struct super_block *sb = dentry->d_sb;
struct fuse_conn *fc = get_fuse_conn_super(sb);
struct fuse_req *req;
struct fuse_statfs_out outarg;
return 0;
}
-static void fuse_conn_release(struct kobject *kobj)
-{
- kfree(get_fuse_conn_kobj(kobj));
-}
-
static struct fuse_conn *new_conn(void)
{
struct fuse_conn *fc;
fc = kzalloc(sizeof(*fc), GFP_KERNEL);
if (fc) {
spin_lock_init(&fc->lock);
+ atomic_set(&fc->count, 1);
init_waitqueue_head(&fc->waitq);
init_waitqueue_head(&fc->blocked_waitq);
INIT_LIST_HEAD(&fc->pending);
INIT_LIST_HEAD(&fc->processing);
INIT_LIST_HEAD(&fc->io);
- INIT_LIST_HEAD(&fc->background);
- init_rwsem(&fc->sbput_sem);
- kobj_set_kset_s(fc, connections_subsys);
- kobject_init(&fc->kobj);
+ INIT_LIST_HEAD(&fc->interrupts);
atomic_set(&fc->num_waiting, 0);
fc->bdi.ra_pages = (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
fc->bdi.unplug_io_fn = default_unplug_io_fn;
fc->reqctr = 0;
fc->blocked = 1;
+ get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key));
}
return fc;
}
+void fuse_conn_put(struct fuse_conn *fc)
+{
+ if (atomic_dec_and_test(&fc->count))
+ kfree(fc);
+}
+
+struct fuse_conn *fuse_conn_get(struct fuse_conn *fc)
+{
+ atomic_inc(&fc->count);
+ return fc;
+}
+
static struct inode *get_root_inode(struct super_block *sb, unsigned mode)
{
struct fuse_attr attr;
.destroy_inode = fuse_destroy_inode,
.read_inode = fuse_read_inode,
.clear_inode = fuse_clear_inode,
+ .remount_fs = fuse_remount_fs,
.put_super = fuse_put_super,
.umount_begin = fuse_umount_begin,
.statfs = fuse_statfs,
ra_pages = arg->max_readahead / PAGE_CACHE_SIZE;
if (arg->flags & FUSE_ASYNC_READ)
fc->async_read = 1;
- } else
+ if (!(arg->flags & FUSE_POSIX_LOCKS))
+ fc->no_lock = 1;
+ } else {
ra_pages = fc->max_read / PAGE_CACHE_SIZE;
+ fc->no_lock = 1;
+ }
fc->bdi.ra_pages = min(fc->bdi.ra_pages, ra_pages);
fc->minor = arg->minor;
arg->major = FUSE_KERNEL_VERSION;
arg->minor = FUSE_KERNEL_MINOR_VERSION;
arg->max_readahead = fc->bdi.ra_pages * PAGE_CACHE_SIZE;
- arg->flags |= FUSE_ASYNC_READ;
+ arg->flags |= FUSE_ASYNC_READ | FUSE_POSIX_LOCKS;
req->in.h.opcode = FUSE_INIT;
req->in.numargs = 1;
req->in.args[0].size = sizeof(*arg);
request_send_background(fc, req);
}
-static unsigned long long conn_id(void)
+static u64 conn_id(void)
{
- /* BKL is held for ->get_sb() */
- static unsigned long long ctr = 1;
+ static u64 ctr = 1;
return ctr++;
}
struct fuse_req *init_req;
int err;
+ if (sb->s_flags & MS_MANDLOCK)
+ return -EINVAL;
+
if (!parse_fuse_opt((char *) data, &d))
return -EINVAL;
if (!init_req)
goto err_put_root;
- err = kobject_set_name(&fc->kobj, "%llu", conn_id());
- if (err)
- goto err_free_req;
-
- err = kobject_add(&fc->kobj);
- if (err)
- goto err_free_req;
-
- /* Setting file->private_data can't race with other mount()
- instances, since BKL is held for ->get_sb() */
+ mutex_lock(&fuse_mutex);
err = -EINVAL;
if (file->private_data)
- goto err_kobject_del;
+ goto err_unlock;
+ fc->id = conn_id();
+ err = fuse_ctl_add_conn(fc);
+ if (err)
+ goto err_unlock;
+
+ list_add_tail(&fc->entry, &fuse_conn_list);
sb->s_root = root_dentry;
- fc->mounted = 1;
fc->connected = 1;
- kobject_get(&fc->kobj);
- file->private_data = fc;
+ file->private_data = fuse_conn_get(fc);
+ mutex_unlock(&fuse_mutex);
/*
* atomic_dec_and_test() in fput() provides the necessary
* memory barrier for file->private_data to be visible on all
return 0;
- err_kobject_del:
- kobject_del(&fc->kobj);
- err_free_req:
+ err_unlock:
+ mutex_unlock(&fuse_mutex);
fuse_request_free(init_req);
err_put_root:
dput(root_dentry);
err:
fput(file);
- kobject_put(&fc->kobj);
+ fuse_conn_put(fc);
return err;
}
-static struct super_block *fuse_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *raw_data)
+static int fuse_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *raw_data, struct vfsmount *mnt)
{
- return get_sb_nodev(fs_type, flags, raw_data, fuse_fill_super);
+ return get_sb_nodev(fs_type, flags, raw_data, fuse_fill_super, mnt);
}
static struct file_system_type fuse_fs_type = {
.kill_sb = kill_anon_super,
};
-static ssize_t fuse_conn_waiting_show(struct fuse_conn *fc, char *page)
-{
- return sprintf(page, "%i\n", atomic_read(&fc->num_waiting));
-}
-
-static ssize_t fuse_conn_abort_store(struct fuse_conn *fc, const char *page,
- size_t count)
-{
- fuse_abort_conn(fc);
- return count;
-}
-
-static struct fuse_conn_attr fuse_conn_waiting =
- __ATTR(waiting, 0400, fuse_conn_waiting_show, NULL);
-static struct fuse_conn_attr fuse_conn_abort =
- __ATTR(abort, 0600, NULL, fuse_conn_abort_store);
-
-static struct attribute *fuse_conn_attrs[] = {
- &fuse_conn_waiting.attr,
- &fuse_conn_abort.attr,
- NULL,
-};
-
-static ssize_t fuse_conn_attr_show(struct kobject *kobj,
- struct attribute *attr,
- char *page)
-{
- struct fuse_conn_attr *fca =
- container_of(attr, struct fuse_conn_attr, attr);
-
- if (fca->show)
- return fca->show(get_fuse_conn_kobj(kobj), page);
- else
- return -EACCES;
-}
-
-static ssize_t fuse_conn_attr_store(struct kobject *kobj,
- struct attribute *attr,
- const char *page, size_t count)
-{
- struct fuse_conn_attr *fca =
- container_of(attr, struct fuse_conn_attr, attr);
-
- if (fca->store)
- return fca->store(get_fuse_conn_kobj(kobj), page, count);
- else
- return -EACCES;
-}
-
-static struct sysfs_ops fuse_conn_sysfs_ops = {
- .show = &fuse_conn_attr_show,
- .store = &fuse_conn_attr_store,
-};
-
-static struct kobj_type ktype_fuse_conn = {
- .release = fuse_conn_release,
- .sysfs_ops = &fuse_conn_sysfs_ops,
- .default_attrs = fuse_conn_attrs,
-};
-
static decl_subsys(fuse, NULL, NULL);
-static decl_subsys(connections, &ktype_fuse_conn, NULL);
+static decl_subsys(connections, NULL, NULL);
static void fuse_inode_init_once(void *foo, kmem_cache_t *cachep,
unsigned long flags)
printk("fuse init (API version %i.%i)\n",
FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
+ INIT_LIST_HEAD(&fuse_conn_list);
res = fuse_fs_init();
if (res)
goto err;
if (res)
goto err_dev_cleanup;
+ res = fuse_ctl_init();
+ if (res)
+ goto err_sysfs_cleanup;
+
return 0;
+ err_sysfs_cleanup:
+ fuse_sysfs_cleanup();
err_dev_cleanup:
fuse_dev_cleanup();
err_fs_cleanup:
{
printk(KERN_DEBUG "fuse exit\n");
+ fuse_ctl_cleanup();
fuse_sysfs_cleanup();
fuse_fs_cleanup();
fuse_dev_cleanup();
git.openpandora.org / pandora-kernel.git / blobdiff