fi->orig_ino = 0;
fi->state = 0;
mutex_init(&fi->mutex);
+ init_rwsem(&fi->i_mmap_sem);
spin_lock_init(&fi->lock);
fi->forget = fuse_alloc_forget();
- if (!fi->forget) {
- kmem_cache_free(fuse_inode_cachep, fi);
- return NULL;
- }
+ if (!fi->forget)
+ goto out_free;
+
+ if (IS_ENABLED(CONFIG_FUSE_DAX) && !fuse_dax_inode_alloc(sb, fi))
+ goto out_free_forget;
return &fi->inode;
+
+out_free_forget:
+ kfree(fi->forget);
+out_free:
+ kmem_cache_free(fuse_inode_cachep, fi);
+ return NULL;
}
static void fuse_free_inode(struct inode *inode)
mutex_destroy(&fi->mutex);
kfree(fi->forget);
+#ifdef CONFIG_FUSE_DAX
+ kfree(fi->dax);
+#endif
kmem_cache_free(fuse_inode_cachep, fi);
}
clear_inode(inode);
if (inode->i_sb->s_flags & SB_ACTIVE) {
struct fuse_conn *fc = get_fuse_conn(inode);
- fuse_queue_forget(fc, fi->forget, fi->nodeid, fi->nlookup);
- fi->forget = NULL;
+
+ if (FUSE_IS_DAX(inode))
+ fuse_dax_inode_cleanup(inode);
+ if (fi->nlookup) {
+ fuse_queue_forget(fc, fi->forget, fi->nodeid,
+ fi->nlookup);
+ fi->forget = NULL;
+ }
}
if (S_ISREG(inode->i_mode) && !is_bad_inode(inode)) {
WARN_ON(!list_empty(&fi->write_files));
BUG();
}
-int fuse_inode_eq(struct inode *inode, void *_nodeidp)
+static int fuse_inode_eq(struct inode *inode, void *_nodeidp)
{
u64 nodeid = *(u64 *) _nodeidp;
if (get_node_id(inode) == nodeid)
struct fuse_inode *fi;
struct fuse_conn *fc = get_fuse_conn_super(sb);
- retry:
+ /*
+ * Auto mount points get their node id from the submount root, which is
+ * not a unique identifier within this filesystem.
+ *
+ * To avoid conflicts, do not place submount points into the inode hash
+ * table.
+ */
+ if (fc->auto_submounts && (attr->flags & FUSE_ATTR_SUBMOUNT) &&
+ S_ISDIR(attr->mode)) {
+ inode = new_inode(sb);
+ if (!inode)
+ return NULL;
+
+ fuse_init_inode(inode, attr);
+ get_fuse_inode(inode)->nodeid = nodeid;
+ inode->i_flags |= S_AUTOMOUNT;
+ goto done;
+ }
+
+retry:
inode = iget5_locked(sb, nodeid, fuse_inode_eq, fuse_inode_set, &nodeid);
if (!inode)
return NULL;
iput(inode);
goto retry;
}
-
+done:
fi = get_fuse_inode(inode);
spin_lock(&fi->lock);
fi->nlookup++;
return inode;
}
-int fuse_reverse_inval_inode(struct super_block *sb, u64 nodeid,
+struct inode *fuse_ilookup(struct fuse_conn *fc, u64 nodeid,
+ struct fuse_mount **fm)
+{
+ struct fuse_mount *fm_iter;
+ struct inode *inode;
+
+ WARN_ON(!rwsem_is_locked(&fc->killsb));
+ list_for_each_entry(fm_iter, &fc->mounts, fc_entry) {
+ if (!fm_iter->sb)
+ continue;
+
+ inode = ilookup5(fm_iter->sb, nodeid, fuse_inode_eq, &nodeid);
+ if (inode) {
+ if (fm)
+ *fm = fm_iter;
+ return inode;
+ }
+ }
+
+ return NULL;
+}
+
+int fuse_reverse_inval_inode(struct fuse_conn *fc, u64 nodeid,
loff_t offset, loff_t len)
{
- struct fuse_conn *fc = get_fuse_conn_super(sb);
struct fuse_inode *fi;
struct inode *inode;
pgoff_t pg_start;
pgoff_t pg_end;
- inode = ilookup5(sb, nodeid, fuse_inode_eq, &nodeid);
+ inode = fuse_ilookup(fc, nodeid, NULL);
if (!inode)
return -ENOENT;
fuse_abort_conn(fc);
}
-static void fuse_send_destroy(struct fuse_conn *fc)
+static void fuse_send_destroy(struct fuse_mount *fm)
{
- if (fc->conn_init) {
+ if (fm->fc->conn_init) {
FUSE_ARGS(args);
args.opcode = FUSE_DESTROY;
args.force = true;
args.nocreds = true;
- fuse_simple_request(fc, &args);
+ fuse_simple_request(fm, &args);
}
}
static void fuse_put_super(struct super_block *sb)
{
- struct fuse_conn *fc = get_fuse_conn_super(sb);
+ struct fuse_mount *fm = get_fuse_mount_super(sb);
- mutex_lock(&fuse_mutex);
- list_del(&fc->entry);
- fuse_ctl_remove_conn(fc);
- mutex_unlock(&fuse_mutex);
-
- fuse_conn_put(fc);
+ fuse_mount_put(fm);
}
static void convert_fuse_statfs(struct kstatfs *stbuf, struct fuse_kstatfs *attr)
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_mount *fm = get_fuse_mount_super(sb);
FUSE_ARGS(args);
struct fuse_statfs_out outarg;
int err;
- if (!fuse_allow_current_process(fc)) {
+ if (!fuse_allow_current_process(fm->fc)) {
buf->f_type = FUSE_SUPER_MAGIC;
return 0;
}
args.out_numargs = 1;
args.out_args[0].size = sizeof(outarg);
args.out_args[0].value = &outarg;
- err = fuse_simple_request(fc, &args);
+ err = fuse_simple_request(fm, &args);
if (!err)
convert_fuse_statfs(buf, &outarg.st);
return err;
struct super_block *sb = root->d_sb;
struct fuse_conn *fc = get_fuse_conn_super(sb);
- if (fc->no_mount_options)
- return 0;
+ if (fc->legacy_opts_show) {
+ seq_printf(m, ",user_id=%u",
+ from_kuid_munged(fc->user_ns, fc->user_id));
+ seq_printf(m, ",group_id=%u",
+ from_kgid_munged(fc->user_ns, fc->group_id));
+ if (fc->default_permissions)
+ seq_puts(m, ",default_permissions");
+ if (fc->allow_other)
+ seq_puts(m, ",allow_other");
+ if (fc->max_read != ~0)
+ seq_printf(m, ",max_read=%u", fc->max_read);
+ if (sb->s_bdev && sb->s_blocksize != FUSE_DEFAULT_BLKSIZE)
+ seq_printf(m, ",blksize=%lu", sb->s_blocksize);
+ }
+#ifdef CONFIG_FUSE_DAX
+ if (fc->dax)
+ seq_puts(m, ",dax");
+#endif
- seq_printf(m, ",user_id=%u", from_kuid_munged(fc->user_ns, fc->user_id));
- seq_printf(m, ",group_id=%u", from_kgid_munged(fc->user_ns, fc->group_id));
- if (fc->default_permissions)
- seq_puts(m, ",default_permissions");
- if (fc->allow_other)
- seq_puts(m, ",allow_other");
- if (fc->max_read != ~0)
- seq_printf(m, ",max_read=%u", fc->max_read);
- if (sb->s_bdev && sb->s_blocksize != FUSE_DEFAULT_BLKSIZE)
- seq_printf(m, ",blksize=%lu", sb->s_blocksize);
return 0;
}
fpq->connected = 1;
}
-void fuse_conn_init(struct fuse_conn *fc, struct user_namespace *user_ns,
+void fuse_conn_init(struct fuse_conn *fc, struct fuse_mount *fm,
+ struct user_namespace *user_ns,
const struct fuse_iqueue_ops *fiq_ops, void *fiq_priv)
{
memset(fc, 0, sizeof(*fc));
fc->pid_ns = get_pid_ns(task_active_pid_ns(current));
fc->user_ns = get_user_ns(user_ns);
fc->max_pages = FUSE_DEFAULT_MAX_PAGES_PER_REQ;
+
+ INIT_LIST_HEAD(&fc->mounts);
+ list_add(&fm->fc_entry, &fc->mounts);
+ fm->fc = fc;
+ refcount_set(&fm->count, 1);
}
EXPORT_SYMBOL_GPL(fuse_conn_init);
if (refcount_dec_and_test(&fc->count)) {
struct fuse_iqueue *fiq = &fc->iq;
+ if (IS_ENABLED(CONFIG_FUSE_DAX))
+ fuse_dax_conn_free(fc);
if (fiq->ops->release)
fiq->ops->release(fiq);
put_pid_ns(fc->pid_ns);
}
EXPORT_SYMBOL_GPL(fuse_conn_get);
+void fuse_mount_put(struct fuse_mount *fm)
+{
+ if (refcount_dec_and_test(&fm->count)) {
+ if (fm->fc)
+ fuse_conn_put(fm->fc);
+ kfree(fm);
+ }
+}
+EXPORT_SYMBOL_GPL(fuse_mount_put);
+
+struct fuse_mount *fuse_mount_get(struct fuse_mount *fm)
+{
+ refcount_inc(&fm->count);
+ return fm;
+}
+EXPORT_SYMBOL_GPL(fuse_mount_get);
+
static struct inode *fuse_get_root_inode(struct super_block *sb, unsigned mode)
{
struct fuse_attr attr;
struct fuse_init_out out;
};
-static void process_init_reply(struct fuse_conn *fc, struct fuse_args *args,
+static void process_init_reply(struct fuse_mount *fm, struct fuse_args *args,
int error)
{
+ struct fuse_conn *fc = fm->fc;
struct fuse_init_args *ia = container_of(args, typeof(*ia), args);
struct fuse_init_out *arg = &ia->out;
+ bool ok = true;
if (error || arg->major != FUSE_KERNEL_VERSION)
- fc->conn_error = 1;
+ ok = false;
else {
unsigned long ra_pages;
if (arg->flags & FUSE_HANDLE_KILLPRIV)
fc->handle_killpriv = 1;
if (arg->time_gran && arg->time_gran <= 1000000000)
- fc->sb->s_time_gran = arg->time_gran;
+ fm->sb->s_time_gran = arg->time_gran;
if ((arg->flags & FUSE_POSIX_ACL)) {
fc->default_permissions = 1;
fc->posix_acl = 1;
- fc->sb->s_xattr = fuse_acl_xattr_handlers;
+ fm->sb->s_xattr = fuse_acl_xattr_handlers;
}
if (arg->flags & FUSE_CACHE_SYMLINKS)
fc->cache_symlinks = 1;
min_t(unsigned int, FUSE_MAX_MAX_PAGES,
max_t(unsigned int, arg->max_pages, 1));
}
+ if (IS_ENABLED(CONFIG_FUSE_DAX) &&
+ arg->flags & FUSE_MAP_ALIGNMENT &&
+ !fuse_dax_check_alignment(fc, arg->map_alignment)) {
+ ok = false;
+ }
} else {
ra_pages = fc->max_read / PAGE_SIZE;
fc->no_lock = 1;
fc->no_flock = 1;
}
- fc->sb->s_bdi->ra_pages =
- min(fc->sb->s_bdi->ra_pages, ra_pages);
+ fm->sb->s_bdi->ra_pages =
+ min(fm->sb->s_bdi->ra_pages, ra_pages);
fc->minor = arg->minor;
fc->max_write = arg->minor < 5 ? 4096 : arg->max_write;
fc->max_write = max_t(unsigned, 4096, fc->max_write);
}
kfree(ia);
+ if (!ok) {
+ fc->conn_init = 0;
+ fc->conn_error = 1;
+ }
+
fuse_set_initialized(fc);
wake_up_all(&fc->blocked_waitq);
}
-void fuse_send_init(struct fuse_conn *fc)
+void fuse_send_init(struct fuse_mount *fm)
{
struct fuse_init_args *ia;
ia->in.major = FUSE_KERNEL_VERSION;
ia->in.minor = FUSE_KERNEL_MINOR_VERSION;
- ia->in.max_readahead = fc->sb->s_bdi->ra_pages * PAGE_SIZE;
+ ia->in.max_readahead = fm->sb->s_bdi->ra_pages * PAGE_SIZE;
ia->in.flags |=
FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_ATOMIC_O_TRUNC |
FUSE_EXPORT_SUPPORT | FUSE_BIG_WRITES | FUSE_DONT_MASK |
FUSE_PARALLEL_DIROPS | FUSE_HANDLE_KILLPRIV | FUSE_POSIX_ACL |
FUSE_ABORT_ERROR | FUSE_MAX_PAGES | FUSE_CACHE_SYMLINKS |
FUSE_NO_OPENDIR_SUPPORT | FUSE_EXPLICIT_INVAL_DATA;
+#ifdef CONFIG_FUSE_DAX
+ if (fm->fc->dax)
+ ia->in.flags |= FUSE_MAP_ALIGNMENT;
+#endif
+ if (fm->fc->auto_submounts)
+ ia->in.flags |= FUSE_SUBMOUNTS;
+
ia->args.opcode = FUSE_INIT;
ia->args.in_numargs = 1;
ia->args.in_args[0].size = sizeof(ia->in);
ia->args.nocreds = true;
ia->args.end = process_init_reply;
- if (fuse_simple_background(fc, &ia->args, GFP_KERNEL) != 0)
- process_init_reply(fc, &ia->args, -ENOTCONN);
+ if (fuse_simple_background(fm, &ia->args, GFP_KERNEL) != 0)
+ process_init_reply(fm, &ia->args, -ENOTCONN);
}
EXPORT_SYMBOL_GPL(fuse_send_init);
}
EXPORT_SYMBOL_GPL(fuse_dev_free);
+static void fuse_fill_attr_from_inode(struct fuse_attr *attr,
+ const struct fuse_inode *fi)
+{
+ *attr = (struct fuse_attr){
+ .ino = fi->inode.i_ino,
+ .size = fi->inode.i_size,
+ .blocks = fi->inode.i_blocks,
+ .atime = fi->inode.i_atime.tv_sec,
+ .mtime = fi->inode.i_mtime.tv_sec,
+ .ctime = fi->inode.i_ctime.tv_sec,
+ .atimensec = fi->inode.i_atime.tv_nsec,
+ .mtimensec = fi->inode.i_mtime.tv_nsec,
+ .ctimensec = fi->inode.i_ctime.tv_nsec,
+ .mode = fi->inode.i_mode,
+ .nlink = fi->inode.i_nlink,
+ .uid = fi->inode.i_uid.val,
+ .gid = fi->inode.i_gid.val,
+ .rdev = fi->inode.i_rdev,
+ .blksize = 1u << fi->inode.i_blkbits,
+ };
+}
+
+static void fuse_sb_defaults(struct super_block *sb)
+{
+ sb->s_magic = FUSE_SUPER_MAGIC;
+ sb->s_op = &fuse_super_operations;
+ sb->s_xattr = fuse_xattr_handlers;
+ sb->s_maxbytes = MAX_LFS_FILESIZE;
+ sb->s_time_gran = 1;
+ sb->s_export_op = &fuse_export_operations;
+ sb->s_iflags |= SB_I_IMA_UNVERIFIABLE_SIGNATURE;
+ if (sb->s_user_ns != &init_user_ns)
+ sb->s_iflags |= SB_I_UNTRUSTED_MOUNTER;
+ sb->s_flags &= ~(SB_NOSEC | SB_I_VERSION);
+
+ /*
+ * If we are not in the initial user namespace posix
+ * acls must be translated.
+ */
+ if (sb->s_user_ns != &init_user_ns)
+ sb->s_xattr = fuse_no_acl_xattr_handlers;
+}
+
+int fuse_fill_super_submount(struct super_block *sb,
+ struct fuse_inode *parent_fi)
+{
+ struct fuse_mount *fm = get_fuse_mount_super(sb);
+ struct super_block *parent_sb = parent_fi->inode.i_sb;
+ struct fuse_attr root_attr;
+ struct inode *root;
+
+ fuse_sb_defaults(sb);
+ fm->sb = sb;
+
+ WARN_ON(sb->s_bdi != &noop_backing_dev_info);
+ sb->s_bdi = bdi_get(parent_sb->s_bdi);
+
+ sb->s_xattr = parent_sb->s_xattr;
+ sb->s_time_gran = parent_sb->s_time_gran;
+ sb->s_blocksize = parent_sb->s_blocksize;
+ sb->s_blocksize_bits = parent_sb->s_blocksize_bits;
+ sb->s_subtype = kstrdup(parent_sb->s_subtype, GFP_KERNEL);
+ if (parent_sb->s_subtype && !sb->s_subtype)
+ return -ENOMEM;
+
+ fuse_fill_attr_from_inode(&root_attr, parent_fi);
+ root = fuse_iget(sb, parent_fi->nodeid, 0, &root_attr, 0, 0);
+ /*
+ * This inode is just a duplicate, so it is not looked up and
+ * its nlookup should not be incremented. fuse_iget() does
+ * that, though, so undo it here.
+ */
+ get_fuse_inode(root)->nlookup--;
+ sb->s_d_op = &fuse_dentry_operations;
+ sb->s_root = d_make_root(root);
+ if (!sb->s_root)
+ return -ENOMEM;
+
+ return 0;
+}
+
int fuse_fill_super_common(struct super_block *sb, struct fuse_fs_context *ctx)
{
struct fuse_dev *fud = NULL;
- struct fuse_conn *fc = get_fuse_conn_super(sb);
+ struct fuse_mount *fm = get_fuse_mount_super(sb);
+ struct fuse_conn *fc = fm->fc;
struct inode *root;
struct dentry *root_dentry;
int err;
if (sb->s_flags & SB_MANDLOCK)
goto err;
- sb->s_flags &= ~(SB_NOSEC | SB_I_VERSION);
+ fuse_sb_defaults(sb);
if (ctx->is_bdev) {
#ifdef CONFIG_BLOCK
sb->s_subtype = ctx->subtype;
ctx->subtype = NULL;
- sb->s_magic = FUSE_SUPER_MAGIC;
- sb->s_op = &fuse_super_operations;
- sb->s_xattr = fuse_xattr_handlers;
- sb->s_maxbytes = MAX_LFS_FILESIZE;
- sb->s_time_gran = 1;
- sb->s_export_op = &fuse_export_operations;
- sb->s_iflags |= SB_I_IMA_UNVERIFIABLE_SIGNATURE;
- if (sb->s_user_ns != &init_user_ns)
- sb->s_iflags |= SB_I_UNTRUSTED_MOUNTER;
-
- /*
- * If we are not in the initial user namespace posix
- * acls must be translated.
- */
- if (sb->s_user_ns != &init_user_ns)
- sb->s_xattr = fuse_no_acl_xattr_handlers;
+ if (IS_ENABLED(CONFIG_FUSE_DAX)) {
+ err = fuse_dax_conn_alloc(fc, ctx->dax_dev);
+ if (err)
+ goto err;
+ }
if (ctx->fudptr) {
err = -ENOMEM;
fud = fuse_dev_alloc_install(fc);
if (!fud)
- goto err;
+ goto err_free_dax;
}
fc->dev = sb->s_dev;
- fc->sb = sb;
+ fm->sb = sb;
err = fuse_bdi_init(fc, sb);
if (err)
goto err_dev_free;
fc->allow_other = ctx->allow_other;
fc->user_id = ctx->user_id;
fc->group_id = ctx->group_id;
- fc->max_read = max_t(unsigned, 4096, ctx->max_read);
+ fc->legacy_opts_show = ctx->legacy_opts_show;
+ fc->max_read = max_t(unsigned int, 4096, ctx->max_read);
fc->destroy = ctx->destroy;
fc->no_control = ctx->no_control;
fc->no_force_umount = ctx->no_force_umount;
- fc->no_mount_options = ctx->no_mount_options;
err = -ENOMEM;
root = fuse_get_root_inode(sb, ctx->rootmode);
err_dev_free:
if (fud)
fuse_dev_free(fud);
+ err_free_dax:
+ if (IS_ENABLED(CONFIG_FUSE_DAX))
+ fuse_dax_conn_free(fc);
err:
return err;
}
struct file *file;
int err;
struct fuse_conn *fc;
+ struct fuse_mount *fm;
err = -EINVAL;
file = fget(ctx->fd);
if (!fc)
goto err_fput;
- fuse_conn_init(fc, sb->s_user_ns, &fuse_dev_fiq_ops, NULL);
+ fm = kzalloc(sizeof(*fm), GFP_KERNEL);
+ if (!fm) {
+ kfree(fc);
+ goto err_fput;
+ }
+
+ fuse_conn_init(fc, fm, sb->s_user_ns, &fuse_dev_fiq_ops, NULL);
fc->release = fuse_free_conn;
- sb->s_fs_info = fc;
+
+ sb->s_fs_info = fm;
err = fuse_fill_super_common(sb, ctx);
if (err)
* CPUs after this
*/
fput(file);
- fuse_send_init(get_fuse_conn_super(sb));
+ fuse_send_init(get_fuse_mount_super(sb));
return 0;
err_put_conn:
- fuse_conn_put(fc);
+ fuse_mount_put(fm);
sb->s_fs_info = NULL;
err_fput:
fput(file);
ctx->max_read = ~0;
ctx->blksize = FUSE_DEFAULT_BLKSIZE;
+ ctx->legacy_opts_show = true;
#ifdef CONFIG_BLOCK
if (fc->fs_type == &fuseblk_fs_type) {
return 0;
}
-static void fuse_sb_destroy(struct super_block *sb)
+bool fuse_mount_remove(struct fuse_mount *fm)
{
- struct fuse_conn *fc = get_fuse_conn_super(sb);
+ struct fuse_conn *fc = fm->fc;
+ bool last = false;
- if (fc) {
- if (fc->destroy)
- fuse_send_destroy(fc);
+ down_write(&fc->killsb);
+ list_del_init(&fm->fc_entry);
+ if (list_empty(&fc->mounts))
+ last = true;
+ up_write(&fc->killsb);
- fuse_abort_conn(fc);
- fuse_wait_aborted(fc);
+ return last;
+}
+EXPORT_SYMBOL_GPL(fuse_mount_remove);
- down_write(&fc->killsb);
- fc->sb = NULL;
- up_write(&fc->killsb);
+void fuse_conn_destroy(struct fuse_mount *fm)
+{
+ struct fuse_conn *fc = fm->fc;
+
+ if (fc->destroy)
+ fuse_send_destroy(fm);
+
+ fuse_abort_conn(fc);
+ fuse_wait_aborted(fc);
+
+ if (!list_empty(&fc->entry)) {
+ mutex_lock(&fuse_mutex);
+ list_del(&fc->entry);
+ fuse_ctl_remove_conn(fc);
+ mutex_unlock(&fuse_mutex);
}
}
+EXPORT_SYMBOL_GPL(fuse_conn_destroy);
-void fuse_kill_sb_anon(struct super_block *sb)
+static void fuse_kill_sb_anon(struct super_block *sb)
{
- fuse_sb_destroy(sb);
+ struct fuse_mount *fm = get_fuse_mount_super(sb);
+ bool last;
+
+ if (fm) {
+ last = fuse_mount_remove(fm);
+ if (last)
+ fuse_conn_destroy(fm);
+ }
kill_anon_super(sb);
}
-EXPORT_SYMBOL_GPL(fuse_kill_sb_anon);
static struct file_system_type fuse_fs_type = {
.owner = THIS_MODULE,
#ifdef CONFIG_BLOCK
static void fuse_kill_sb_blk(struct super_block *sb)
{
- fuse_sb_destroy(sb);
+ struct fuse_mount *fm = get_fuse_mount_super(sb);
+ bool last;
+
+ if (fm) {
+ last = fuse_mount_remove(fm);
+ if (last)
+ fuse_conn_destroy(fm);
+ }
kill_block_super(sb);
}
projects / linux-2.6-microblaze.git / blobdiff