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Diffstat (limited to 'cleopatre/linux-2.6.25.10-spc300/fs/fuse/inode.c')
-rw-r--r--cleopatre/linux-2.6.25.10-spc300/fs/fuse/inode.c871
1 files changed, 871 insertions, 0 deletions
diff --git a/cleopatre/linux-2.6.25.10-spc300/fs/fuse/inode.c b/cleopatre/linux-2.6.25.10-spc300/fs/fuse/inode.c
new file mode 100644
index 0000000000..033f7bdd47
--- /dev/null
+++ b/cleopatre/linux-2.6.25.10-spc300/fs/fuse/inode.c
@@ -0,0 +1,871 @@
+/*
+ FUSE: Filesystem in Userspace
+ Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
+
+ This program can be distributed under the terms of the GNU GPL.
+ See the file COPYING.
+*/
+
+#include "fuse_i.h"
+
+#include <linux/pagemap.h>
+#include <linux/slab.h>
+#include <linux/file.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>
+#include <linux/sched.h>
+
+MODULE_AUTHOR("Miklos Szeredi <miklos@szeredi.hu>");
+MODULE_DESCRIPTION("Filesystem in Userspace");
+MODULE_LICENSE("GPL");
+
+static struct kmem_cache *fuse_inode_cachep;
+struct list_head fuse_conn_list;
+DEFINE_MUTEX(fuse_mutex);
+
+#define FUSE_SUPER_MAGIC 0x65735546
+
+#define FUSE_DEFAULT_BLKSIZE 512
+
+struct fuse_mount_data {
+ int fd;
+ unsigned rootmode;
+ unsigned user_id;
+ unsigned group_id;
+ unsigned fd_present : 1;
+ unsigned rootmode_present : 1;
+ unsigned user_id_present : 1;
+ unsigned group_id_present : 1;
+ unsigned flags;
+ unsigned max_read;
+ unsigned blksize;
+};
+
+static struct inode *fuse_alloc_inode(struct super_block *sb)
+{
+ struct inode *inode;
+ struct fuse_inode *fi;
+
+ inode = kmem_cache_alloc(fuse_inode_cachep, GFP_KERNEL);
+ if (!inode)
+ return NULL;
+
+ fi = get_fuse_inode(inode);
+ fi->i_time = 0;
+ fi->nodeid = 0;
+ fi->nlookup = 0;
+ fi->attr_version = 0;
+ INIT_LIST_HEAD(&fi->write_files);
+ fi->forget_req = fuse_request_alloc();
+ if (!fi->forget_req) {
+ kmem_cache_free(fuse_inode_cachep, inode);
+ return NULL;
+ }
+
+ return inode;
+}
+
+static void fuse_destroy_inode(struct inode *inode)
+{
+ struct fuse_inode *fi = get_fuse_inode(inode);
+ BUG_ON(!list_empty(&fi->write_files));
+ if (fi->forget_req)
+ fuse_request_free(fi->forget_req);
+ kmem_cache_free(fuse_inode_cachep, inode);
+}
+
+void fuse_send_forget(struct fuse_conn *fc, struct fuse_req *req,
+ unsigned long nodeid, u64 nlookup)
+{
+ struct fuse_forget_in *inarg = &req->misc.forget_in;
+ inarg->nlookup = nlookup;
+ req->in.h.opcode = FUSE_FORGET;
+ req->in.h.nodeid = nodeid;
+ req->in.numargs = 1;
+ req->in.args[0].size = sizeof(struct fuse_forget_in);
+ req->in.args[0].value = inarg;
+ request_send_noreply(fc, req);
+}
+
+static void fuse_clear_inode(struct inode *inode)
+{
+ if (inode->i_sb->s_flags & MS_ACTIVE) {
+ struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_inode *fi = get_fuse_inode(inode);
+ fuse_send_forget(fc, fi->forget_req, fi->nodeid, fi->nlookup);
+ fi->forget_req = NULL;
+ }
+}
+
+static int fuse_remount_fs(struct super_block *sb, int *flags, char *data)
+{
+ if (*flags & MS_MANDLOCK)
+ return -EINVAL;
+
+ return 0;
+}
+
+static void fuse_truncate(struct address_space *mapping, loff_t offset)
+{
+ /* See vmtruncate() */
+ unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
+ truncate_inode_pages(mapping, offset);
+ unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
+}
+
+
+void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr,
+ u64 attr_valid, u64 attr_version)
+{
+ struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_inode *fi = get_fuse_inode(inode);
+ loff_t oldsize;
+
+ spin_lock(&fc->lock);
+ if (attr_version != 0 && fi->attr_version > attr_version) {
+ spin_unlock(&fc->lock);
+ return;
+ }
+ fi->attr_version = ++fc->attr_version;
+ fi->i_time = attr_valid;
+
+ inode->i_ino = attr->ino;
+ inode->i_mode = (inode->i_mode & S_IFMT) | (attr->mode & 07777);
+ inode->i_nlink = attr->nlink;
+ inode->i_uid = attr->uid;
+ inode->i_gid = attr->gid;
+ inode->i_blocks = attr->blocks;
+ inode->i_atime.tv_sec = attr->atime;
+ inode->i_atime.tv_nsec = attr->atimensec;
+ inode->i_mtime.tv_sec = attr->mtime;
+ inode->i_mtime.tv_nsec = attr->mtimensec;
+ inode->i_ctime.tv_sec = attr->ctime;
+ inode->i_ctime.tv_nsec = attr->ctimensec;
+
+ if (attr->blksize != 0)
+ inode->i_blkbits = ilog2(attr->blksize);
+ else
+ inode->i_blkbits = inode->i_sb->s_blocksize_bits;
+
+ /*
+ * Don't set the sticky bit in i_mode, unless we want the VFS
+ * to check permissions. This prevents failures due to the
+ * check in may_delete().
+ */
+ fi->orig_i_mode = inode->i_mode;
+ if (!(fc->flags & FUSE_DEFAULT_PERMISSIONS))
+ inode->i_mode &= ~S_ISVTX;
+
+ oldsize = inode->i_size;
+ i_size_write(inode, attr->size);
+ spin_unlock(&fc->lock);
+
+ if (S_ISREG(inode->i_mode) && oldsize != attr->size) {
+ if (attr->size < oldsize)
+ fuse_truncate(inode->i_mapping, attr->size);
+ invalidate_inode_pages2(inode->i_mapping);
+ }
+}
+
+static void fuse_init_inode(struct inode *inode, struct fuse_attr *attr)
+{
+ inode->i_mode = attr->mode & S_IFMT;
+ inode->i_size = attr->size;
+ if (S_ISREG(inode->i_mode)) {
+ fuse_init_common(inode);
+ fuse_init_file_inode(inode);
+ } else if (S_ISDIR(inode->i_mode))
+ fuse_init_dir(inode);
+ else if (S_ISLNK(inode->i_mode))
+ fuse_init_symlink(inode);
+ else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
+ S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
+ fuse_init_common(inode);
+ init_special_inode(inode, inode->i_mode,
+ new_decode_dev(attr->rdev));
+ } else
+ BUG();
+}
+
+static int fuse_inode_eq(struct inode *inode, void *_nodeidp)
+{
+ unsigned long nodeid = *(unsigned long *) _nodeidp;
+ if (get_node_id(inode) == nodeid)
+ return 1;
+ else
+ return 0;
+}
+
+static int fuse_inode_set(struct inode *inode, void *_nodeidp)
+{
+ unsigned long nodeid = *(unsigned long *) _nodeidp;
+ get_fuse_inode(inode)->nodeid = nodeid;
+ return 0;
+}
+
+struct inode *fuse_iget(struct super_block *sb, unsigned long nodeid,
+ int generation, struct fuse_attr *attr,
+ u64 attr_valid, u64 attr_version)
+{
+ struct inode *inode;
+ struct fuse_inode *fi;
+ struct fuse_conn *fc = get_fuse_conn_super(sb);
+
+ retry:
+ inode = iget5_locked(sb, nodeid, fuse_inode_eq, fuse_inode_set, &nodeid);
+ if (!inode)
+ return NULL;
+
+ if ((inode->i_state & I_NEW)) {
+ inode->i_flags |= S_NOATIME|S_NOCMTIME;
+ inode->i_generation = generation;
+ inode->i_data.backing_dev_info = &fc->bdi;
+ fuse_init_inode(inode, attr);
+ unlock_new_inode(inode);
+ } else if ((inode->i_mode ^ attr->mode) & S_IFMT) {
+ /* Inode has changed type, any I/O on the old should fail */
+ make_bad_inode(inode);
+ iput(inode);
+ goto retry;
+ }
+
+ fi = get_fuse_inode(inode);
+ spin_lock(&fc->lock);
+ fi->nlookup ++;
+ spin_unlock(&fc->lock);
+ fuse_change_attributes(inode, attr, attr_valid, attr_version);
+
+ return inode;
+}
+
+static void fuse_umount_begin(struct vfsmount *vfsmnt, int flags)
+{
+ if (flags & MNT_FORCE)
+ fuse_abort_conn(get_fuse_conn_super(vfsmnt->mnt_sb));
+}
+
+static void fuse_send_destroy(struct fuse_conn *fc)
+{
+ struct fuse_req *req = fc->destroy_req;
+ if (req && fc->conn_init) {
+ fc->destroy_req = NULL;
+ req->in.h.opcode = FUSE_DESTROY;
+ req->force = 1;
+ request_send(fc, req);
+ fuse_put_request(fc, req);
+ }
+}
+
+static void fuse_put_super(struct super_block *sb)
+{
+ struct fuse_conn *fc = get_fuse_conn_super(sb);
+
+ fuse_send_destroy(fc);
+ spin_lock(&fc->lock);
+ fc->connected = 0;
+ fc->blocked = 0;
+ spin_unlock(&fc->lock);
+ /* Flush all readers on this fs */
+ kill_fasync(&fc->fasync, SIGIO, POLL_IN);
+ wake_up_all(&fc->waitq);
+ wake_up_all(&fc->blocked_waitq);
+ wake_up_all(&fc->reserved_req_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)
+{
+ stbuf->f_type = FUSE_SUPER_MAGIC;
+ stbuf->f_bsize = attr->bsize;
+ stbuf->f_frsize = attr->frsize;
+ stbuf->f_blocks = attr->blocks;
+ stbuf->f_bfree = attr->bfree;
+ stbuf->f_bavail = attr->bavail;
+ stbuf->f_files = attr->files;
+ stbuf->f_ffree = attr->ffree;
+ stbuf->f_namelen = attr->namelen;
+ /* fsid is left zero */
+}
+
+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;
+ int err;
+
+ if (!fuse_allow_task(fc, current)) {
+ buf->f_type = FUSE_SUPER_MAGIC;
+ return 0;
+ }
+
+ req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
+
+ memset(&outarg, 0, sizeof(outarg));
+ req->in.numargs = 0;
+ req->in.h.opcode = FUSE_STATFS;
+ req->in.h.nodeid = get_node_id(dentry->d_inode);
+ req->out.numargs = 1;
+ req->out.args[0].size =
+ fc->minor < 4 ? FUSE_COMPAT_STATFS_SIZE : sizeof(outarg);
+ req->out.args[0].value = &outarg;
+ request_send(fc, req);
+ err = req->out.h.error;
+ if (!err)
+ convert_fuse_statfs(buf, &outarg.st);
+ fuse_put_request(fc, req);
+ return err;
+}
+
+enum {
+ OPT_FD,
+ OPT_ROOTMODE,
+ OPT_USER_ID,
+ OPT_GROUP_ID,
+ OPT_DEFAULT_PERMISSIONS,
+ OPT_ALLOW_OTHER,
+ OPT_MAX_READ,
+ OPT_BLKSIZE,
+ OPT_ERR
+};
+
+static match_table_t tokens = {
+ {OPT_FD, "fd=%u"},
+ {OPT_ROOTMODE, "rootmode=%o"},
+ {OPT_USER_ID, "user_id=%u"},
+ {OPT_GROUP_ID, "group_id=%u"},
+ {OPT_DEFAULT_PERMISSIONS, "default_permissions"},
+ {OPT_ALLOW_OTHER, "allow_other"},
+ {OPT_MAX_READ, "max_read=%u"},
+ {OPT_BLKSIZE, "blksize=%u"},
+ {OPT_ERR, NULL}
+};
+
+static int parse_fuse_opt(char *opt, struct fuse_mount_data *d, int is_bdev)
+{
+ char *p;
+ memset(d, 0, sizeof(struct fuse_mount_data));
+ d->max_read = ~0;
+ d->blksize = FUSE_DEFAULT_BLKSIZE;
+
+ while ((p = strsep(&opt, ",")) != NULL) {
+ int token;
+ int value;
+ substring_t args[MAX_OPT_ARGS];
+ if (!*p)
+ continue;
+
+ token = match_token(p, tokens, args);
+ switch (token) {
+ case OPT_FD:
+ if (match_int(&args[0], &value))
+ return 0;
+ d->fd = value;
+ d->fd_present = 1;
+ break;
+
+ case OPT_ROOTMODE:
+ if (match_octal(&args[0], &value))
+ return 0;
+ if (!fuse_valid_type(value))
+ return 0;
+ d->rootmode = value;
+ d->rootmode_present = 1;
+ break;
+
+ case OPT_USER_ID:
+ if (match_int(&args[0], &value))
+ return 0;
+ d->user_id = value;
+ d->user_id_present = 1;
+ break;
+
+ case OPT_GROUP_ID:
+ if (match_int(&args[0], &value))
+ return 0;
+ d->group_id = value;
+ d->group_id_present = 1;
+ break;
+
+ case OPT_DEFAULT_PERMISSIONS:
+ d->flags |= FUSE_DEFAULT_PERMISSIONS;
+ break;
+
+ case OPT_ALLOW_OTHER:
+ d->flags |= FUSE_ALLOW_OTHER;
+ break;
+
+ case OPT_MAX_READ:
+ if (match_int(&args[0], &value))
+ return 0;
+ d->max_read = value;
+ break;
+
+ case OPT_BLKSIZE:
+ if (!is_bdev || match_int(&args[0], &value))
+ return 0;
+ d->blksize = value;
+ break;
+
+ default:
+ return 0;
+ }
+ }
+
+ if (!d->fd_present || !d->rootmode_present ||
+ !d->user_id_present || !d->group_id_present)
+ return 0;
+
+ return 1;
+}
+
+static int fuse_show_options(struct seq_file *m, struct vfsmount *mnt)
+{
+ struct fuse_conn *fc = get_fuse_conn_super(mnt->mnt_sb);
+
+ seq_printf(m, ",user_id=%u", fc->user_id);
+ seq_printf(m, ",group_id=%u", fc->group_id);
+ if (fc->flags & FUSE_DEFAULT_PERMISSIONS)
+ seq_puts(m, ",default_permissions");
+ if (fc->flags & FUSE_ALLOW_OTHER)
+ seq_puts(m, ",allow_other");
+ if (fc->max_read != ~0)
+ seq_printf(m, ",max_read=%u", fc->max_read);
+ if (mnt->mnt_sb->s_bdev &&
+ mnt->mnt_sb->s_blocksize != FUSE_DEFAULT_BLKSIZE)
+ seq_printf(m, ",blksize=%lu", mnt->mnt_sb->s_blocksize);
+ return 0;
+}
+
+static struct fuse_conn *new_conn(void)
+{
+ struct fuse_conn *fc;
+ int err;
+
+ fc = kzalloc(sizeof(*fc), GFP_KERNEL);
+ if (fc) {
+ spin_lock_init(&fc->lock);
+ mutex_init(&fc->inst_mutex);
+ atomic_set(&fc->count, 1);
+ init_waitqueue_head(&fc->waitq);
+ init_waitqueue_head(&fc->blocked_waitq);
+ init_waitqueue_head(&fc->reserved_req_waitq);
+ INIT_LIST_HEAD(&fc->pending);
+ INIT_LIST_HEAD(&fc->processing);
+ INIT_LIST_HEAD(&fc->io);
+ INIT_LIST_HEAD(&fc->interrupts);
+ INIT_LIST_HEAD(&fc->bg_queue);
+ 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;
+ err = bdi_init(&fc->bdi);
+ if (err) {
+ kfree(fc);
+ fc = NULL;
+ goto out;
+ }
+ fc->reqctr = 0;
+ fc->blocked = 1;
+ fc->attr_version = 1;
+ get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key));
+ }
+out:
+ return fc;
+}
+
+void fuse_conn_put(struct fuse_conn *fc)
+{
+ if (atomic_dec_and_test(&fc->count)) {
+ if (fc->destroy_req)
+ fuse_request_free(fc->destroy_req);
+ mutex_destroy(&fc->inst_mutex);
+ bdi_destroy(&fc->bdi);
+ 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;
+ memset(&attr, 0, sizeof(attr));
+
+ attr.mode = mode;
+ attr.ino = FUSE_ROOT_ID;
+ attr.nlink = 1;
+ return fuse_iget(sb, 1, 0, &attr, 0, 0);
+}
+
+static const struct super_operations fuse_super_operations = {
+ .alloc_inode = fuse_alloc_inode,
+ .destroy_inode = fuse_destroy_inode,
+ .clear_inode = fuse_clear_inode,
+ .drop_inode = generic_delete_inode,
+ .remount_fs = fuse_remount_fs,
+ .put_super = fuse_put_super,
+ .umount_begin = fuse_umount_begin,
+ .statfs = fuse_statfs,
+ .show_options = fuse_show_options,
+};
+
+static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
+{
+ struct fuse_init_out *arg = &req->misc.init_out;
+
+ if (req->out.h.error || arg->major != FUSE_KERNEL_VERSION)
+ fc->conn_error = 1;
+ else {
+ unsigned long ra_pages;
+
+ if (arg->minor >= 6) {
+ ra_pages = arg->max_readahead / PAGE_CACHE_SIZE;
+ if (arg->flags & FUSE_ASYNC_READ)
+ fc->async_read = 1;
+ if (!(arg->flags & FUSE_POSIX_LOCKS))
+ fc->no_lock = 1;
+ if (arg->flags & FUSE_ATOMIC_O_TRUNC)
+ fc->atomic_o_trunc = 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;
+ fc->max_write = arg->minor < 5 ? 4096 : arg->max_write;
+ fc->conn_init = 1;
+ }
+ fuse_put_request(fc, req);
+ fc->blocked = 0;
+ wake_up_all(&fc->blocked_waitq);
+}
+
+static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req)
+{
+ struct fuse_init_in *arg = &req->misc.init_in;
+
+ 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 | FUSE_POSIX_LOCKS | FUSE_ATOMIC_O_TRUNC;
+ req->in.h.opcode = FUSE_INIT;
+ req->in.numargs = 1;
+ req->in.args[0].size = sizeof(*arg);
+ req->in.args[0].value = arg;
+ req->out.numargs = 1;
+ /* Variable length arguement used for backward compatibility
+ with interface version < 7.5. Rest of init_out is zeroed
+ by do_get_request(), so a short reply is not a problem */
+ req->out.argvar = 1;
+ req->out.args[0].size = sizeof(struct fuse_init_out);
+ req->out.args[0].value = &req->misc.init_out;
+ req->end = process_init_reply;
+ request_send_background(fc, req);
+}
+
+static u64 conn_id(void)
+{
+ static u64 ctr = 1;
+ return ctr++;
+}
+
+static int fuse_fill_super(struct super_block *sb, void *data, int silent)
+{
+ struct fuse_conn *fc;
+ struct inode *root;
+ struct fuse_mount_data d;
+ struct file *file;
+ struct dentry *root_dentry;
+ struct fuse_req *init_req;
+ int err;
+ int is_bdev = sb->s_bdev != NULL;
+
+ if (sb->s_flags & MS_MANDLOCK)
+ return -EINVAL;
+
+ if (!parse_fuse_opt((char *) data, &d, is_bdev))
+ return -EINVAL;
+
+ if (is_bdev) {
+#ifdef CONFIG_BLOCK
+ if (!sb_set_blocksize(sb, d.blksize))
+ return -EINVAL;
+#endif
+ } else {
+ sb->s_blocksize = PAGE_CACHE_SIZE;
+ sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
+ }
+ sb->s_magic = FUSE_SUPER_MAGIC;
+ sb->s_op = &fuse_super_operations;
+ sb->s_maxbytes = MAX_LFS_FILESIZE;
+
+ file = fget(d.fd);
+ if (!file)
+ return -EINVAL;
+
+ if (file->f_op != &fuse_dev_operations)
+ return -EINVAL;
+
+ fc = new_conn();
+ if (!fc)
+ return -ENOMEM;
+
+ fc->flags = d.flags;
+ fc->user_id = d.user_id;
+ fc->group_id = d.group_id;
+ fc->max_read = d.max_read;
+
+ /* Used by get_root_inode() */
+ sb->s_fs_info = fc;
+
+ err = -ENOMEM;
+ root = get_root_inode(sb, d.rootmode);
+ if (!root)
+ goto err;
+
+ root_dentry = d_alloc_root(root);
+ if (!root_dentry) {
+ iput(root);
+ goto err;
+ }
+
+ init_req = fuse_request_alloc();
+ if (!init_req)
+ goto err_put_root;
+
+ if (is_bdev) {
+ fc->destroy_req = fuse_request_alloc();
+ if (!fc->destroy_req)
+ goto err_put_root;
+ }
+
+ mutex_lock(&fuse_mutex);
+ err = -EINVAL;
+ if (file->private_data)
+ 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->connected = 1;
+ 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
+ * CPUs after this
+ */
+ fput(file);
+
+ fuse_send_init(fc, init_req);
+
+ return 0;
+
+ err_unlock:
+ mutex_unlock(&fuse_mutex);
+ fuse_request_free(init_req);
+ err_put_root:
+ dput(root_dentry);
+ err:
+ fput(file);
+ fuse_conn_put(fc);
+ return err;
+}
+
+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, mnt);
+}
+
+static struct file_system_type fuse_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "fuse",
+ .fs_flags = FS_HAS_SUBTYPE,
+ .get_sb = fuse_get_sb,
+ .kill_sb = kill_anon_super,
+};
+
+#ifdef CONFIG_BLOCK
+static int fuse_get_sb_blk(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *raw_data, struct vfsmount *mnt)
+{
+ return get_sb_bdev(fs_type, flags, dev_name, raw_data, fuse_fill_super,
+ mnt);
+}
+
+static struct file_system_type fuseblk_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "fuseblk",
+ .get_sb = fuse_get_sb_blk,
+ .kill_sb = kill_block_super,
+ .fs_flags = FS_REQUIRES_DEV | FS_HAS_SUBTYPE,
+};
+
+static inline int register_fuseblk(void)
+{
+ return register_filesystem(&fuseblk_fs_type);
+}
+
+static inline void unregister_fuseblk(void)
+{
+ unregister_filesystem(&fuseblk_fs_type);
+}
+#else
+static inline int register_fuseblk(void)
+{
+ return 0;
+}
+
+static inline void unregister_fuseblk(void)
+{
+}
+#endif
+
+static void fuse_inode_init_once(struct kmem_cache *cachep, void *foo)
+{
+ struct inode * inode = foo;
+
+ inode_init_once(inode);
+}
+
+static int __init fuse_fs_init(void)
+{
+ int err;
+
+ err = register_filesystem(&fuse_fs_type);
+ if (err)
+ goto out;
+
+ err = register_fuseblk();
+ if (err)
+ goto out_unreg;
+
+ fuse_inode_cachep = kmem_cache_create("fuse_inode",
+ sizeof(struct fuse_inode),
+ 0, SLAB_HWCACHE_ALIGN,
+ fuse_inode_init_once);
+ err = -ENOMEM;
+ if (!fuse_inode_cachep)
+ goto out_unreg2;
+
+ return 0;
+
+ out_unreg2:
+ unregister_fuseblk();
+ out_unreg:
+ unregister_filesystem(&fuse_fs_type);
+ out:
+ return err;
+}
+
+static void fuse_fs_cleanup(void)
+{
+ unregister_filesystem(&fuse_fs_type);
+ unregister_fuseblk();
+ kmem_cache_destroy(fuse_inode_cachep);
+}
+
+static struct kobject *fuse_kobj;
+static struct kobject *connections_kobj;
+
+static int fuse_sysfs_init(void)
+{
+ int err;
+
+ fuse_kobj = kobject_create_and_add("fuse", fs_kobj);
+ if (!fuse_kobj) {
+ err = -ENOMEM;
+ goto out_err;
+ }
+
+ connections_kobj = kobject_create_and_add("connections", fuse_kobj);
+ if (!connections_kobj) {
+ err = -ENOMEM;
+ goto out_fuse_unregister;
+ }
+
+ return 0;
+
+ out_fuse_unregister:
+ kobject_put(fuse_kobj);
+ out_err:
+ return err;
+}
+
+static void fuse_sysfs_cleanup(void)
+{
+ kobject_put(connections_kobj);
+ kobject_put(fuse_kobj);
+}
+
+static int __init fuse_init(void)
+{
+ int res;
+
+ 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;
+
+ res = fuse_dev_init();
+ if (res)
+ goto err_fs_cleanup;
+
+ res = fuse_sysfs_init();
+ 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:
+ fuse_fs_cleanup();
+ err:
+ return res;
+}
+
+static void __exit fuse_exit(void)
+{
+ printk(KERN_DEBUG "fuse exit\n");
+
+ fuse_ctl_cleanup();
+ fuse_sysfs_cleanup();
+ fuse_fs_cleanup();
+ fuse_dev_cleanup();
+}
+
+module_init(fuse_init);
+module_exit(fuse_exit);