From ade8df59a0d7d3ac394b61f3096b5963d18dcfcc Mon Sep 17 00:00:00 2001 From: lefranc Date: Thu, 19 Mar 2009 08:34:57 +0000 Subject: [kernel] changed linux-2.6.25.10 to linux-2.6.25.10-spc300 [bundle] add bundle creation functionnality git-svn-id: svn+ssh://pessac/svn/cesar/trunk@4255 017c9cb6-072f-447c-8318-d5b54f68fe89 --- cleopatre/linux-2.6.25.10-spc300/fs/fuse/inode.c | 871 +++++++++++++++++++++++ 1 file changed, 871 insertions(+) create mode 100644 cleopatre/linux-2.6.25.10-spc300/fs/fuse/inode.c (limited to 'cleopatre/linux-2.6.25.10-spc300/fs/fuse/inode.c') 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 + + This program can be distributed under the terms of the GNU GPL. + See the file COPYING. +*/ + +#include "fuse_i.h" + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +MODULE_AUTHOR("Miklos Szeredi "); +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); -- cgit v1.2.3