return 0;
else if (time_after(jiffies, entry->d_time)) {
int err;
- int version;
struct fuse_entry_out outarg;
struct inode *inode = entry->d_inode;
struct fuse_inode *fi = get_fuse_inode(inode);
struct fuse_conn *fc = get_fuse_conn(inode);
- struct fuse_req *req = fuse_get_request_nonint(fc);
+ struct fuse_req *req = fuse_get_request(fc);
if (!req)
return 0;
fuse_lookup_init(req, entry->d_parent->d_inode, entry, &outarg);
- request_send_nonint(fc, req);
- version = req->out.h.unique;
+ request_send(fc, req);
err = req->out.h.error;
+ if (!err) {
+ if (outarg.nodeid != get_node_id(inode)) {
+ fuse_send_forget(fc, req, outarg.nodeid, 1);
+ return 0;
+ }
+ fi->nlookup ++;
+ }
fuse_put_request(fc, req);
- if (err || outarg.nodeid != get_node_id(inode) ||
- (outarg.attr.mode ^ inode->i_mode) & S_IFMT)
+ if (err || (outarg.attr.mode ^ inode->i_mode) & S_IFMT)
return 0;
fuse_change_attributes(inode, &outarg.attr);
- inode->i_version = version;
entry->d_time = time_to_jiffies(outarg.entry_valid,
outarg.entry_valid_nsec);
fi->i_time = time_to_jiffies(outarg.attr_valid,
struct inode **inodep)
{
int err;
- int version;
struct fuse_entry_out outarg;
struct inode *inode = NULL;
struct fuse_conn *fc = get_fuse_conn(dir);
req = fuse_get_request(fc);
if (!req)
- return -ERESTARTNOINTR;
+ return -EINTR;
fuse_lookup_init(req, dir, entry, &outarg);
request_send(fc, req);
- version = req->out.h.unique;
err = req->out.h.error;
if (!err) {
inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
- &outarg.attr, version);
+ &outarg.attr);
if (!inode) {
- fuse_send_forget(fc, req, outarg.nodeid, version);
+ fuse_send_forget(fc, req, outarg.nodeid, 1);
return -ENOMEM;
}
}
return 0;
}
+void fuse_invalidate_attr(struct inode *inode)
+{
+ get_fuse_inode(inode)->i_time = jiffies - 1;
+}
+
+static void fuse_invalidate_entry(struct dentry *entry)
+{
+ d_invalidate(entry);
+ entry->d_time = jiffies - 1;
+}
+
+static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req,
+ struct inode *dir, struct dentry *entry,
+ int mode)
+{
+ struct fuse_entry_out outarg;
+ struct inode *inode;
+ struct fuse_inode *fi;
+ int err;
+
+ req->in.h.nodeid = get_node_id(dir);
+ req->inode = dir;
+ req->out.numargs = 1;
+ req->out.args[0].size = sizeof(outarg);
+ req->out.args[0].value = &outarg;
+ request_send(fc, req);
+ err = req->out.h.error;
+ if (err) {
+ fuse_put_request(fc, req);
+ return err;
+ }
+ inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
+ &outarg.attr);
+ if (!inode) {
+ fuse_send_forget(fc, req, outarg.nodeid, 1);
+ return -ENOMEM;
+ }
+ fuse_put_request(fc, req);
+
+ /* Don't allow userspace to do really stupid things... */
+ if ((inode->i_mode ^ mode) & S_IFMT) {
+ iput(inode);
+ return -EIO;
+ }
+
+ entry->d_time = time_to_jiffies(outarg.entry_valid,
+ outarg.entry_valid_nsec);
+
+ fi = get_fuse_inode(inode);
+ fi->i_time = time_to_jiffies(outarg.attr_valid,
+ outarg.attr_valid_nsec);
+
+ d_instantiate(entry, inode);
+ fuse_invalidate_attr(dir);
+ return 0;
+}
+
+static int fuse_mknod(struct inode *dir, struct dentry *entry, int mode,
+ dev_t rdev)
+{
+ struct fuse_mknod_in inarg;
+ struct fuse_conn *fc = get_fuse_conn(dir);
+ struct fuse_req *req = fuse_get_request(fc);
+ if (!req)
+ return -EINTR;
+
+ memset(&inarg, 0, sizeof(inarg));
+ inarg.mode = mode;
+ inarg.rdev = new_encode_dev(rdev);
+ req->in.h.opcode = FUSE_MKNOD;
+ req->in.numargs = 2;
+ req->in.args[0].size = sizeof(inarg);
+ req->in.args[0].value = &inarg;
+ req->in.args[1].size = entry->d_name.len + 1;
+ req->in.args[1].value = entry->d_name.name;
+ return create_new_entry(fc, req, dir, entry, mode);
+}
+
+static int fuse_create(struct inode *dir, struct dentry *entry, int mode,
+ struct nameidata *nd)
+{
+ return fuse_mknod(dir, entry, mode, 0);
+}
+
+static int fuse_mkdir(struct inode *dir, struct dentry *entry, int mode)
+{
+ struct fuse_mkdir_in inarg;
+ struct fuse_conn *fc = get_fuse_conn(dir);
+ struct fuse_req *req = fuse_get_request(fc);
+ if (!req)
+ return -EINTR;
+
+ memset(&inarg, 0, sizeof(inarg));
+ inarg.mode = mode;
+ req->in.h.opcode = FUSE_MKDIR;
+ req->in.numargs = 2;
+ req->in.args[0].size = sizeof(inarg);
+ req->in.args[0].value = &inarg;
+ req->in.args[1].size = entry->d_name.len + 1;
+ req->in.args[1].value = entry->d_name.name;
+ return create_new_entry(fc, req, dir, entry, S_IFDIR);
+}
+
+static int fuse_symlink(struct inode *dir, struct dentry *entry,
+ const char *link)
+{
+ struct fuse_conn *fc = get_fuse_conn(dir);
+ unsigned len = strlen(link) + 1;
+ struct fuse_req *req;
+
+ if (len > FUSE_SYMLINK_MAX)
+ return -ENAMETOOLONG;
+
+ req = fuse_get_request(fc);
+ if (!req)
+ return -EINTR;
+
+ req->in.h.opcode = FUSE_SYMLINK;
+ req->in.numargs = 2;
+ req->in.args[0].size = entry->d_name.len + 1;
+ req->in.args[0].value = entry->d_name.name;
+ req->in.args[1].size = len;
+ req->in.args[1].value = link;
+ return create_new_entry(fc, req, dir, entry, S_IFLNK);
+}
+
+static int fuse_unlink(struct inode *dir, struct dentry *entry)
+{
+ int err;
+ struct fuse_conn *fc = get_fuse_conn(dir);
+ struct fuse_req *req = fuse_get_request(fc);
+ if (!req)
+ return -EINTR;
+
+ req->in.h.opcode = FUSE_UNLINK;
+ req->in.h.nodeid = get_node_id(dir);
+ req->inode = dir;
+ req->in.numargs = 1;
+ req->in.args[0].size = entry->d_name.len + 1;
+ req->in.args[0].value = entry->d_name.name;
+ request_send(fc, req);
+ err = req->out.h.error;
+ fuse_put_request(fc, req);
+ if (!err) {
+ struct inode *inode = entry->d_inode;
+
+ /* Set nlink to zero so the inode can be cleared, if
+ the inode does have more links this will be
+ discovered at the next lookup/getattr */
+ inode->i_nlink = 0;
+ fuse_invalidate_attr(inode);
+ fuse_invalidate_attr(dir);
+ } else if (err == -EINTR)
+ fuse_invalidate_entry(entry);
+ return err;
+}
+
+static int fuse_rmdir(struct inode *dir, struct dentry *entry)
+{
+ int err;
+ struct fuse_conn *fc = get_fuse_conn(dir);
+ struct fuse_req *req = fuse_get_request(fc);
+ if (!req)
+ return -EINTR;
+
+ req->in.h.opcode = FUSE_RMDIR;
+ req->in.h.nodeid = get_node_id(dir);
+ req->inode = dir;
+ req->in.numargs = 1;
+ req->in.args[0].size = entry->d_name.len + 1;
+ req->in.args[0].value = entry->d_name.name;
+ request_send(fc, req);
+ err = req->out.h.error;
+ fuse_put_request(fc, req);
+ if (!err) {
+ entry->d_inode->i_nlink = 0;
+ fuse_invalidate_attr(dir);
+ } else if (err == -EINTR)
+ fuse_invalidate_entry(entry);
+ return err;
+}
+
+static int fuse_rename(struct inode *olddir, struct dentry *oldent,
+ struct inode *newdir, struct dentry *newent)
+{
+ int err;
+ struct fuse_rename_in inarg;
+ struct fuse_conn *fc = get_fuse_conn(olddir);
+ struct fuse_req *req = fuse_get_request(fc);
+ if (!req)
+ return -EINTR;
+
+ memset(&inarg, 0, sizeof(inarg));
+ inarg.newdir = get_node_id(newdir);
+ req->in.h.opcode = FUSE_RENAME;
+ req->in.h.nodeid = get_node_id(olddir);
+ req->inode = olddir;
+ req->inode2 = newdir;
+ req->in.numargs = 3;
+ req->in.args[0].size = sizeof(inarg);
+ req->in.args[0].value = &inarg;
+ req->in.args[1].size = oldent->d_name.len + 1;
+ req->in.args[1].value = oldent->d_name.name;
+ req->in.args[2].size = newent->d_name.len + 1;
+ req->in.args[2].value = newent->d_name.name;
+ request_send(fc, req);
+ err = req->out.h.error;
+ fuse_put_request(fc, req);
+ if (!err) {
+ fuse_invalidate_attr(olddir);
+ if (olddir != newdir)
+ fuse_invalidate_attr(newdir);
+ } else if (err == -EINTR) {
+ /* If request was interrupted, DEITY only knows if the
+ rename actually took place. If the invalidation
+ fails (e.g. some process has CWD under the renamed
+ directory), then there can be inconsistency between
+ the dcache and the real filesystem. Tough luck. */
+ fuse_invalidate_entry(oldent);
+ if (newent->d_inode)
+ fuse_invalidate_entry(newent);
+ }
+
+ return err;
+}
+
+static int fuse_link(struct dentry *entry, struct inode *newdir,
+ struct dentry *newent)
+{
+ int err;
+ struct fuse_link_in inarg;
+ struct inode *inode = entry->d_inode;
+ struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_req *req = fuse_get_request(fc);
+ if (!req)
+ return -EINTR;
+
+ memset(&inarg, 0, sizeof(inarg));
+ inarg.oldnodeid = get_node_id(inode);
+ req->in.h.opcode = FUSE_LINK;
+ req->inode2 = inode;
+ req->in.numargs = 2;
+ req->in.args[0].size = sizeof(inarg);
+ req->in.args[0].value = &inarg;
+ req->in.args[1].size = newent->d_name.len + 1;
+ req->in.args[1].value = newent->d_name.name;
+ err = create_new_entry(fc, req, newdir, newent, inode->i_mode);
+ /* Contrary to "normal" filesystems it can happen that link
+ makes two "logical" inodes point to the same "physical"
+ inode. We invalidate the attributes of the old one, so it
+ will reflect changes in the backing inode (link count,
+ etc.)
+ */
+ if (!err || err == -EINTR)
+ fuse_invalidate_attr(inode);
+ return err;
+}
+
int fuse_do_getattr(struct inode *inode)
{
int err;
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_req *req = fuse_get_request(fc);
if (!req)
- return -ERESTARTNOINTR;
+ return -EINTR;
req->in.h.opcode = FUSE_GETATTR;
req->in.h.nodeid = get_node_id(inode);
return err;
}
+/*
+ * Calling into a user-controlled filesystem gives the filesystem
+ * daemon ptrace-like capabilities over the requester process. This
+ * means, that the filesystem daemon is able to record the exact
+ * filesystem operations performed, and can also control the behavior
+ * of the requester process in otherwise impossible ways. For example
+ * it can delay the operation for arbitrary length of time allowing
+ * DoS against the requester.
+ *
+ * For this reason only those processes can call into the filesystem,
+ * for which the owner of the mount has ptrace privilege. This
+ * excludes processes started by other users, suid or sgid processes.
+ */
+static int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task)
+{
+ if (fc->flags & FUSE_ALLOW_OTHER)
+ return 1;
+
+ if (task->euid == fc->user_id &&
+ task->suid == fc->user_id &&
+ task->uid == fc->user_id &&
+ task->egid == fc->group_id &&
+ task->sgid == fc->group_id &&
+ task->gid == fc->group_id)
+ return 1;
+
+ return 0;
+}
+
static int fuse_revalidate(struct dentry *entry)
{
struct inode *inode = entry->d_inode;
struct fuse_inode *fi = get_fuse_inode(inode);
struct fuse_conn *fc = get_fuse_conn(inode);
- if (get_node_id(inode) == FUSE_ROOT_ID) {
- if (current->fsuid != fc->user_id)
- return -EACCES;
- } else if (time_before_eq(jiffies, fi->i_time))
+ if (!fuse_allow_task(fc, current))
+ return -EACCES;
+ if (get_node_id(inode) != FUSE_ROOT_ID &&
+ time_before_eq(jiffies, fi->i_time))
return 0;
return fuse_do_getattr(inode);
{
struct fuse_conn *fc = get_fuse_conn(inode);
- if (current->fsuid != fc->user_id)
+ if (!fuse_allow_task(fc, current))
return -EACCES;
- else {
+ else if (fc->flags & FUSE_DEFAULT_PERMISSIONS) {
+ int err = generic_permission(inode, mask, NULL);
+
+ /* If permission is denied, try to refresh file
+ attributes. This is also needed, because the root
+ node will at first have no permissions */
+ if (err == -EACCES) {
+ err = fuse_do_getattr(inode);
+ if (!err)
+ err = generic_permission(inode, mask, NULL);
+ }
+
+ /* FIXME: Need some mechanism to revoke permissions:
+ currently if the filesystem suddenly changes the
+ file mode, we will not be informed about it, and
+ continue to allow access to the file/directory.
+
+ This is actually not so grave, since the user can
+ simply keep access to the file/directory anyway by
+ keeping it open... */
+
+ return err;
+ } else {
int mode = inode->i_mode;
if ((mask & MAY_WRITE) && IS_RDONLY(inode) &&
(S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)))
return 0;
}
-static int fuse_checkdir(struct file *cfile, struct file *file)
+static inline size_t fuse_send_readdir(struct fuse_req *req, struct file *file,
+ struct inode *inode, loff_t pos,
+ size_t count)
{
- struct inode *inode;
- if (!cfile)
- return -EIO;
- inode = cfile->f_dentry->d_inode;
- if (!S_ISREG(inode->i_mode)) {
- fput(cfile);
- return -EIO;
- }
-
- file->private_data = cfile;
- return 0;
+ return fuse_send_read_common(req, file, inode, pos, count, 1);
}
-static int fuse_getdir(struct file *file)
+static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir)
{
+ int err;
+ size_t nbytes;
+ struct page *page;
struct inode *inode = file->f_dentry->d_inode;
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_req *req = fuse_get_request(fc);
- struct fuse_getdir_out_i outarg;
- int err;
-
if (!req)
- return -ERESTARTNOINTR;
+ return -EINTR;
- req->in.h.opcode = FUSE_GETDIR;
- req->in.h.nodeid = get_node_id(inode);
- req->inode = inode;
- req->out.numargs = 1;
- req->out.args[0].size = sizeof(struct fuse_getdir_out);
- req->out.args[0].value = &outarg;
- request_send(fc, req);
+ page = alloc_page(GFP_KERNEL);
+ if (!page) {
+ fuse_put_request(fc, req);
+ return -ENOMEM;
+ }
+ req->num_pages = 1;
+ req->pages[0] = page;
+ nbytes = fuse_send_readdir(req, file, inode, file->f_pos, PAGE_SIZE);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err)
- err = fuse_checkdir(outarg.file, file);
- return err;
-}
-
-static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir)
-{
- struct file *cfile = file->private_data;
- char *buf;
- int ret;
-
- if (!cfile) {
- ret = fuse_getdir(file);
- if (ret)
- return ret;
-
- cfile = file->private_data;
- }
-
- buf = (char *) __get_free_page(GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
+ err = parse_dirfile(page_address(page), nbytes, file, dstbuf,
+ filldir);
- ret = kernel_read(cfile, file->f_pos, buf, PAGE_SIZE);
- if (ret > 0)
- ret = parse_dirfile(buf, ret, file, dstbuf, filldir);
-
- free_page((unsigned long) buf);
- return ret;
+ __free_page(page);
+ fuse_invalidate_attr(inode); /* atime changed */
+ return err;
}
static char *read_link(struct dentry *dentry)
char *link;
if (!req)
- return ERR_PTR(-ERESTARTNOINTR);
+ return ERR_PTR(-EINTR);
link = (char *) __get_free_page(GFP_KERNEL);
if (!link) {
link[req->out.args[0].size] = '\0';
out:
fuse_put_request(fc, req);
+ fuse_invalidate_attr(inode); /* atime changed */
return link;
}
static int fuse_dir_open(struct inode *inode, struct file *file)
{
- file->private_data = NULL;
- return 0;
+ return fuse_open_common(inode, file, 1);
}
static int fuse_dir_release(struct inode *inode, struct file *file)
{
- struct file *cfile = file->private_data;
+ return fuse_release_common(inode, file, 1);
+}
- if (cfile)
- fput(cfile);
+static int fuse_dir_fsync(struct file *file, struct dentry *de, int datasync)
+{
+ /* nfsd can call this with no file */
+ return file ? fuse_fsync_common(file, de, datasync, 1) : 0;
+}
- return 0;
+static unsigned iattr_to_fattr(struct iattr *iattr, struct fuse_attr *fattr)
+{
+ unsigned ivalid = iattr->ia_valid;
+ unsigned fvalid = 0;
+
+ memset(fattr, 0, sizeof(*fattr));
+
+ if (ivalid & ATTR_MODE)
+ fvalid |= FATTR_MODE, fattr->mode = iattr->ia_mode;
+ if (ivalid & ATTR_UID)
+ fvalid |= FATTR_UID, fattr->uid = iattr->ia_uid;
+ if (ivalid & ATTR_GID)
+ fvalid |= FATTR_GID, fattr->gid = iattr->ia_gid;
+ if (ivalid & ATTR_SIZE)
+ fvalid |= FATTR_SIZE, fattr->size = iattr->ia_size;
+ /* You can only _set_ these together (they may change by themselves) */
+ if ((ivalid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) {
+ fvalid |= FATTR_ATIME | FATTR_MTIME;
+ fattr->atime = iattr->ia_atime.tv_sec;
+ fattr->mtime = iattr->ia_mtime.tv_sec;
+ }
+
+ return fvalid;
+}
+
+static int fuse_setattr(struct dentry *entry, struct iattr *attr)
+{
+ struct inode *inode = entry->d_inode;
+ struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_inode *fi = get_fuse_inode(inode);
+ struct fuse_req *req;
+ struct fuse_setattr_in inarg;
+ struct fuse_attr_out outarg;
+ int err;
+ int is_truncate = 0;
+
+ if (fc->flags & FUSE_DEFAULT_PERMISSIONS) {
+ err = inode_change_ok(inode, attr);
+ if (err)
+ return err;
+ }
+
+ if (attr->ia_valid & ATTR_SIZE) {
+ unsigned long limit;
+ is_truncate = 1;
+ limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
+ if (limit != RLIM_INFINITY && attr->ia_size > (loff_t) limit) {
+ send_sig(SIGXFSZ, current, 0);
+ return -EFBIG;
+ }
+ }
+
+ req = fuse_get_request(fc);
+ if (!req)
+ return -EINTR;
+
+ memset(&inarg, 0, sizeof(inarg));
+ inarg.valid = iattr_to_fattr(attr, &inarg.attr);
+ req->in.h.opcode = FUSE_SETATTR;
+ req->in.h.nodeid = get_node_id(inode);
+ req->inode = inode;
+ req->in.numargs = 1;
+ req->in.args[0].size = sizeof(inarg);
+ req->in.args[0].value = &inarg;
+ req->out.numargs = 1;
+ req->out.args[0].size = sizeof(outarg);
+ req->out.args[0].value = &outarg;
+ request_send(fc, req);
+ err = req->out.h.error;
+ fuse_put_request(fc, req);
+ if (!err) {
+ if ((inode->i_mode ^ outarg.attr.mode) & S_IFMT) {
+ make_bad_inode(inode);
+ err = -EIO;
+ } else {
+ if (is_truncate) {
+ loff_t origsize = i_size_read(inode);
+ i_size_write(inode, outarg.attr.size);
+ if (origsize > outarg.attr.size)
+ vmtruncate(inode, outarg.attr.size);
+ }
+ fuse_change_attributes(inode, &outarg.attr);
+ fi->i_time = time_to_jiffies(outarg.attr_valid,
+ outarg.attr_valid_nsec);
+ }
+ } else if (err == -EINTR)
+ fuse_invalidate_attr(inode);
+
+ return err;
}
static int fuse_getattr(struct vfsmount *mnt, struct dentry *entry,
return d_splice_alias(inode, entry);
}
+static int fuse_setxattr(struct dentry *entry, const char *name,
+ const void *value, size_t size, int flags)
+{
+ struct inode *inode = entry->d_inode;
+ struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_req *req;
+ struct fuse_setxattr_in inarg;
+ int err;
+
+ if (size > FUSE_XATTR_SIZE_MAX)
+ return -E2BIG;
+
+ if (fc->no_setxattr)
+ return -EOPNOTSUPP;
+
+ req = fuse_get_request(fc);
+ if (!req)
+ return -EINTR;
+
+ memset(&inarg, 0, sizeof(inarg));
+ inarg.size = size;
+ inarg.flags = flags;
+ req->in.h.opcode = FUSE_SETXATTR;
+ req->in.h.nodeid = get_node_id(inode);
+ req->inode = inode;
+ req->in.numargs = 3;
+ req->in.args[0].size = sizeof(inarg);
+ req->in.args[0].value = &inarg;
+ req->in.args[1].size = strlen(name) + 1;
+ req->in.args[1].value = name;
+ req->in.args[2].size = size;
+ req->in.args[2].value = value;
+ request_send(fc, req);
+ err = req->out.h.error;
+ fuse_put_request(fc, req);
+ if (err == -ENOSYS) {
+ fc->no_setxattr = 1;
+ err = -EOPNOTSUPP;
+ }
+ return err;
+}
+
+static ssize_t fuse_getxattr(struct dentry *entry, const char *name,
+ void *value, size_t size)
+{
+ struct inode *inode = entry->d_inode;
+ struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_req *req;
+ struct fuse_getxattr_in inarg;
+ struct fuse_getxattr_out outarg;
+ ssize_t ret;
+
+ if (fc->no_getxattr)
+ return -EOPNOTSUPP;
+
+ req = fuse_get_request(fc);
+ if (!req)
+ return -EINTR;
+
+ memset(&inarg, 0, sizeof(inarg));
+ inarg.size = size;
+ req->in.h.opcode = FUSE_GETXATTR;
+ req->in.h.nodeid = get_node_id(inode);
+ req->inode = inode;
+ req->in.numargs = 2;
+ req->in.args[0].size = sizeof(inarg);
+ req->in.args[0].value = &inarg;
+ req->in.args[1].size = strlen(name) + 1;
+ req->in.args[1].value = name;
+ /* This is really two different operations rolled into one */
+ req->out.numargs = 1;
+ if (size) {
+ req->out.argvar = 1;
+ req->out.args[0].size = size;
+ req->out.args[0].value = value;
+ } else {
+ req->out.args[0].size = sizeof(outarg);
+ req->out.args[0].value = &outarg;
+ }
+ request_send(fc, req);
+ ret = req->out.h.error;
+ if (!ret)
+ ret = size ? req->out.args[0].size : outarg.size;
+ else {
+ if (ret == -ENOSYS) {
+ fc->no_getxattr = 1;
+ ret = -EOPNOTSUPP;
+ }
+ }
+ fuse_put_request(fc, req);
+ return ret;
+}
+
+static ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size)
+{
+ struct inode *inode = entry->d_inode;
+ struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_req *req;
+ struct fuse_getxattr_in inarg;
+ struct fuse_getxattr_out outarg;
+ ssize_t ret;
+
+ if (fc->no_listxattr)
+ return -EOPNOTSUPP;
+
+ req = fuse_get_request(fc);
+ if (!req)
+ return -EINTR;
+
+ memset(&inarg, 0, sizeof(inarg));
+ inarg.size = size;
+ req->in.h.opcode = FUSE_LISTXATTR;
+ req->in.h.nodeid = get_node_id(inode);
+ req->inode = inode;
+ req->in.numargs = 1;
+ req->in.args[0].size = sizeof(inarg);
+ req->in.args[0].value = &inarg;
+ /* This is really two different operations rolled into one */
+ req->out.numargs = 1;
+ if (size) {
+ req->out.argvar = 1;
+ req->out.args[0].size = size;
+ req->out.args[0].value = list;
+ } else {
+ req->out.args[0].size = sizeof(outarg);
+ req->out.args[0].value = &outarg;
+ }
+ request_send(fc, req);
+ ret = req->out.h.error;
+ if (!ret)
+ ret = size ? req->out.args[0].size : outarg.size;
+ else {
+ if (ret == -ENOSYS) {
+ fc->no_listxattr = 1;
+ ret = -EOPNOTSUPP;
+ }
+ }
+ fuse_put_request(fc, req);
+ return ret;
+}
+
+static int fuse_removexattr(struct dentry *entry, const char *name)
+{
+ struct inode *inode = entry->d_inode;
+ struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_req *req;
+ int err;
+
+ if (fc->no_removexattr)
+ return -EOPNOTSUPP;
+
+ req = fuse_get_request(fc);
+ if (!req)
+ return -EINTR;
+
+ req->in.h.opcode = FUSE_REMOVEXATTR;
+ req->in.h.nodeid = get_node_id(inode);
+ req->inode = inode;
+ req->in.numargs = 1;
+ req->in.args[0].size = strlen(name) + 1;
+ req->in.args[0].value = name;
+ request_send(fc, req);
+ err = req->out.h.error;
+ fuse_put_request(fc, req);
+ if (err == -ENOSYS) {
+ fc->no_removexattr = 1;
+ err = -EOPNOTSUPP;
+ }
+ return err;
+}
+
static struct inode_operations fuse_dir_inode_operations = {
.lookup = fuse_lookup,
+ .mkdir = fuse_mkdir,
+ .symlink = fuse_symlink,
+ .unlink = fuse_unlink,
+ .rmdir = fuse_rmdir,
+ .rename = fuse_rename,
+ .link = fuse_link,
+ .setattr = fuse_setattr,
+ .create = fuse_create,
+ .mknod = fuse_mknod,
.permission = fuse_permission,
.getattr = fuse_getattr,
+ .setxattr = fuse_setxattr,
+ .getxattr = fuse_getxattr,
+ .listxattr = fuse_listxattr,
+ .removexattr = fuse_removexattr,
};
static struct file_operations fuse_dir_operations = {
+ .llseek = generic_file_llseek,
.read = generic_read_dir,
.readdir = fuse_readdir,
.open = fuse_dir_open,
.release = fuse_dir_release,
+ .fsync = fuse_dir_fsync,
};
static struct inode_operations fuse_common_inode_operations = {
+ .setattr = fuse_setattr,
.permission = fuse_permission,
.getattr = fuse_getattr,
+ .setxattr = fuse_setxattr,
+ .getxattr = fuse_getxattr,
+ .listxattr = fuse_listxattr,
+ .removexattr = fuse_removexattr,
};
static struct inode_operations fuse_symlink_inode_operations = {
+ .setattr = fuse_setattr,
.follow_link = fuse_follow_link,
.put_link = fuse_put_link,
.readlink = generic_readlink,
.getattr = fuse_getattr,
+ .setxattr = fuse_setxattr,
+ .getxattr = fuse_getxattr,
+ .listxattr = fuse_listxattr,
+ .removexattr = fuse_removexattr,
};
void fuse_init_common(struct inode *inode)
projects / deliverable / linux.git / blobdiff