Example #1
0
/*
 * try renew caps after session gets killed.
 */
int ceph_renew_caps(struct inode *inode)
{
	struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
	struct ceph_inode_info *ci = ceph_inode(inode);
	struct ceph_mds_request *req;
	int err, flags, wanted;

	spin_lock(&ci->i_ceph_lock);
	wanted = __ceph_caps_file_wanted(ci);
	if (__ceph_is_any_real_caps(ci) &&
	    (!(wanted & CEPH_CAP_ANY_WR) == 0 || ci->i_auth_cap)) {
		int issued = __ceph_caps_issued(ci, NULL);
		spin_unlock(&ci->i_ceph_lock);
		dout("renew caps %p want %s issued %s updating mds_wanted\n",
		     inode, ceph_cap_string(wanted), ceph_cap_string(issued));
		ceph_check_caps(ci, 0, NULL);
		return 0;
	}
	spin_unlock(&ci->i_ceph_lock);

	flags = 0;
	if ((wanted & CEPH_CAP_FILE_RD) && (wanted & CEPH_CAP_FILE_WR))
		flags = O_RDWR;
	else if (wanted & CEPH_CAP_FILE_RD)
		flags = O_RDONLY;
	else if (wanted & CEPH_CAP_FILE_WR)
		flags = O_WRONLY;
#ifdef O_LAZY
	if (wanted & CEPH_CAP_FILE_LAZYIO)
		flags |= O_LAZY;
#endif

	req = prepare_open_request(inode->i_sb, flags, 0);
	if (IS_ERR(req)) {
		err = PTR_ERR(req);
		goto out;
	}

	req->r_inode = inode;
	ihold(inode);
	req->r_num_caps = 1;
	req->r_fmode = -1;

	err = ceph_mdsc_do_request(mdsc, NULL, req);
	ceph_mdsc_put_request(req);
out:
	dout("renew caps %p open result=%d\n", inode, err);
	return err < 0 ? err : 0;
}
Example #2
0
/*
 * flags
 *  path_lookup_open   -> LOOKUP_OPEN
 *  path_lookup_create -> LOOKUP_OPEN|LOOKUP_CREATE
 */
struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
				struct nameidata *nd, int mode,
				int locked_dir)
{
	struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
	struct ceph_mds_client *mdsc = fsc->mdsc;
	struct file *file;
	struct ceph_mds_request *req;
	struct dentry *ret;
	int err;
	int flags = nd->intent.open.flags;

	dout("ceph_lookup_open dentry %p '%.*s' flags %d mode 0%o\n",
	     dentry, dentry->d_name.len, dentry->d_name.name, flags, mode);

	/* do the open */
	req = prepare_open_request(dir->i_sb, flags, mode);
	if (IS_ERR(req))
		return ERR_CAST(req);
	req->r_dentry = dget(dentry);
	req->r_num_caps = 2;
	if (flags & O_CREAT) {
		req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
		req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
	}
	req->r_locked_dir = dir;           /* caller holds dir->i_mutex */
	err = ceph_mdsc_do_request(mdsc,
				   (flags & (O_CREAT|O_TRUNC)) ? dir : NULL,
				   req);
	err = ceph_handle_snapdir(req, dentry, err);
	if (err)
		goto out;
	if ((flags & O_CREAT) && !req->r_reply_info.head->is_dentry)
		err = ceph_handle_notrace_create(dir, dentry);
	if (err)
		goto out;
	file = lookup_instantiate_filp(nd, req->r_dentry, ceph_open);
	if (IS_ERR(file))
		err = PTR_ERR(file);
out:
	ret = ceph_finish_lookup(req, dentry, err);
	ceph_mdsc_put_request(req);
	dout("ceph_lookup_open result=%p\n", ret);
	return ret;
}
Example #3
0
/*
 * flags
 *  path_lookup_open   -> LOOKUP_OPEN
 *  path_lookup_create -> LOOKUP_OPEN|LOOKUP_CREATE
 */
struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
				struct nameidata *nd, int mode,
				int locked_dir)
{
	struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
	struct ceph_mds_client *mdsc = fsc->mdsc;
	struct file *file = nd->intent.open.file;
	struct inode *parent_inode = get_dentry_parent_inode(file->f_dentry);
	struct ceph_mds_request *req;
	int err;
	int flags = nd->intent.open.flags - 1;  /* silly vfs! */

	dout("ceph_lookup_open dentry %p '%.*s' flags %d mode 0%o\n",
	     dentry, dentry->d_name.len, dentry->d_name.name, flags, mode);

	/* do the open */
	req = prepare_open_request(dir->i_sb, flags, mode);
	if (IS_ERR(req))
		return ERR_CAST(req);
	req->r_dentry = dget(dentry);
	req->r_num_caps = 2;
	if (flags & O_CREAT) {
		req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
		req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
	}
	req->r_locked_dir = dir;           /* caller holds dir->i_mutex */
	err = ceph_mdsc_do_request(mdsc, parent_inode, req);
	dentry = ceph_finish_lookup(req, dentry, err);
	if (!err && (flags & O_CREAT) && !req->r_reply_info.head->is_dentry)
		err = ceph_handle_notrace_create(dir, dentry);
	if (!err)
		err = ceph_init_file(req->r_dentry->d_inode, file,
				     req->r_fmode);
	ceph_mdsc_put_request(req);
	dout("ceph_lookup_open result=%p\n", dentry);
	return dentry;
}
Example #4
0
/*
 * If the filp already has private_data, that means the file was
 * already opened by intent during lookup, and we do nothing.
 *
 * If we already have the requisite capabilities, we can satisfy
 * the open request locally (no need to request new caps from the
 * MDS).  We do, however, need to inform the MDS (asynchronously)
 * if our wanted caps set expands.
 */
int ceph_open(struct inode *inode, struct file *file)
{
	struct ceph_inode_info *ci = ceph_inode(inode);
	struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
	struct ceph_mds_client *mdsc = fsc->mdsc;
	struct ceph_mds_request *req;
	struct ceph_file_info *cf = file->private_data;
	struct inode *parent_inode = file->f_dentry->d_parent->d_inode;
	int err;
	int flags, fmode, wanted;

	if (cf) {
		dout("open file %p is already opened\n", file);
		return 0;
	}

	/* filter out O_CREAT|O_EXCL; vfs did that already.  yuck. */
	flags = file->f_flags & ~(O_CREAT|O_EXCL);
	if (S_ISDIR(inode->i_mode))
		flags = O_DIRECTORY;  /* mds likes to know */

	dout("open inode %p ino %llx.%llx file %p flags %d (%d)\n", inode,
	     ceph_vinop(inode), file, flags, file->f_flags);
	fmode = ceph_flags_to_mode(flags);
	wanted = ceph_caps_for_mode(fmode);

	/* snapped files are read-only */
	if (ceph_snap(inode) != CEPH_NOSNAP && (file->f_mode & FMODE_WRITE))
		return -EROFS;

	/* trivially open snapdir */
	if (ceph_snap(inode) == CEPH_SNAPDIR) {
		spin_lock(&inode->i_lock);
		__ceph_get_fmode(ci, fmode);
		spin_unlock(&inode->i_lock);
		return ceph_init_file(inode, file, fmode);
	}

	/*
	 * No need to block if we have caps on the auth MDS (for
	 * write) or any MDS (for read).  Update wanted set
	 * asynchronously.
	 */
	spin_lock(&inode->i_lock);
	if (__ceph_is_any_real_caps(ci) &&
	    (((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) {
		int mds_wanted = __ceph_caps_mds_wanted(ci);
		int issued = __ceph_caps_issued(ci, NULL);

		dout("open %p fmode %d want %s issued %s using existing\n",
		     inode, fmode, ceph_cap_string(wanted),
		     ceph_cap_string(issued));
		__ceph_get_fmode(ci, fmode);
		spin_unlock(&inode->i_lock);

		/* adjust wanted? */
		if ((issued & wanted) != wanted &&
		    (mds_wanted & wanted) != wanted &&
		    ceph_snap(inode) != CEPH_SNAPDIR)
			ceph_check_caps(ci, 0, NULL);

		return ceph_init_file(inode, file, fmode);
	} else if (ceph_snap(inode) != CEPH_NOSNAP &&
		   (ci->i_snap_caps & wanted) == wanted) {
		__ceph_get_fmode(ci, fmode);
		spin_unlock(&inode->i_lock);
		return ceph_init_file(inode, file, fmode);
	}
	spin_unlock(&inode->i_lock);

	dout("open fmode %d wants %s\n", fmode, ceph_cap_string(wanted));
	req = prepare_open_request(inode->i_sb, flags, 0);
	if (IS_ERR(req)) {
		err = PTR_ERR(req);
		goto out;
	}
	req->r_inode = igrab(inode);
	req->r_num_caps = 1;
	err = ceph_mdsc_do_request(mdsc, parent_inode, req);
	if (!err)
		err = ceph_init_file(inode, file, req->r_fmode);
	ceph_mdsc_put_request(req);
	dout("open result=%d on %llx.%llx\n", err, ceph_vinop(inode));
out:
	return err;
}
Example #5
0
/*
 * Do a lookup + open with a single request.  If we get a non-existent
 * file or symlink, return 1 so the VFS can retry.
 */
int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
		     struct file *file, unsigned flags, umode_t mode,
		     int *opened)
{
	struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
	struct ceph_mds_client *mdsc = fsc->mdsc;
	struct ceph_mds_request *req;
	struct dentry *dn;
	int err;

	dout("atomic_open %p dentry %p '%.*s' %s flags %d mode 0%o\n",
	     dir, dentry, dentry->d_name.len, dentry->d_name.name,
	     d_unhashed(dentry) ? "unhashed" : "hashed", flags, mode);

	if (dentry->d_name.len > NAME_MAX)
		return -ENAMETOOLONG;

	err = ceph_init_dentry(dentry);
	if (err < 0)
		return err;

	/* do the open */
	req = prepare_open_request(dir->i_sb, flags, mode);
	if (IS_ERR(req))
		return PTR_ERR(req);
	req->r_dentry = dget(dentry);
	req->r_num_caps = 2;
	if (flags & O_CREAT) {
		req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
		req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
	}
	req->r_locked_dir = dir;           /* caller holds dir->i_mutex */
	err = ceph_mdsc_do_request(mdsc,
				   (flags & (O_CREAT|O_TRUNC)) ? dir : NULL,
				   req);
	if (err)
		goto out_err;

	err = ceph_handle_snapdir(req, dentry, err);
	if (err == 0 && (flags & O_CREAT) && !req->r_reply_info.head->is_dentry)
		err = ceph_handle_notrace_create(dir, dentry);

	if (d_unhashed(dentry)) {
		dn = ceph_finish_lookup(req, dentry, err);
		if (IS_ERR(dn))
			err = PTR_ERR(dn);
	} else {
		/* we were given a hashed negative dentry */
		dn = NULL;
	}
	if (err)
		goto out_err;
	if (dn || dentry->d_inode == NULL || S_ISLNK(dentry->d_inode->i_mode)) {
		/* make vfs retry on splice, ENOENT, or symlink */
		dout("atomic_open finish_no_open on dn %p\n", dn);
		err = finish_no_open(file, dn);
	} else {
		dout("atomic_open finish_open on dn %p\n", dn);
		if (req->r_op == CEPH_MDS_OP_CREATE && req->r_reply_info.has_create_ino) {
			*opened |= FILE_CREATED;
		}
		err = finish_open(file, dentry, ceph_open, opened);
	}

out_err:
	ceph_mdsc_put_request(req);
	dout("atomic_open result=%d\n", err);
	return err;
}
int ceph_open(struct inode *inode, struct file *file)
{
	struct ceph_inode_info *ci = ceph_inode(inode);
	struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
	struct ceph_mds_client *mdsc = fsc->mdsc;
	struct ceph_mds_request *req;
	struct ceph_file_info *cf = file->private_data;
	struct inode *parent_inode = NULL;
	int err;
	int flags, fmode, wanted;

	if (cf) {
		dout("open file %p is already opened\n", file);
		return 0;
	}

	
	flags = file->f_flags & ~(O_CREAT|O_EXCL);
	if (S_ISDIR(inode->i_mode))
		flags = O_DIRECTORY;  

	dout("open inode %p ino %llx.%llx file %p flags %d (%d)\n", inode,
	     ceph_vinop(inode), file, flags, file->f_flags);
	fmode = ceph_flags_to_mode(flags);
	wanted = ceph_caps_for_mode(fmode);

	
	if (ceph_snap(inode) != CEPH_NOSNAP && (file->f_mode & FMODE_WRITE))
		return -EROFS;

	
	if (ceph_snap(inode) == CEPH_SNAPDIR) {
		spin_lock(&ci->i_ceph_lock);
		__ceph_get_fmode(ci, fmode);
		spin_unlock(&ci->i_ceph_lock);
		return ceph_init_file(inode, file, fmode);
	}

	spin_lock(&ci->i_ceph_lock);
	if (__ceph_is_any_real_caps(ci) &&
	    (((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) {
		int mds_wanted = __ceph_caps_mds_wanted(ci);
		int issued = __ceph_caps_issued(ci, NULL);

		dout("open %p fmode %d want %s issued %s using existing\n",
		     inode, fmode, ceph_cap_string(wanted),
		     ceph_cap_string(issued));
		__ceph_get_fmode(ci, fmode);
		spin_unlock(&ci->i_ceph_lock);

		
		if ((issued & wanted) != wanted &&
		    (mds_wanted & wanted) != wanted &&
		    ceph_snap(inode) != CEPH_SNAPDIR)
			ceph_check_caps(ci, 0, NULL);

		return ceph_init_file(inode, file, fmode);
	} else if (ceph_snap(inode) != CEPH_NOSNAP &&
		   (ci->i_snap_caps & wanted) == wanted) {
		__ceph_get_fmode(ci, fmode);
		spin_unlock(&ci->i_ceph_lock);
		return ceph_init_file(inode, file, fmode);
	}
	spin_unlock(&ci->i_ceph_lock);

	dout("open fmode %d wants %s\n", fmode, ceph_cap_string(wanted));
	req = prepare_open_request(inode->i_sb, flags, 0);
	if (IS_ERR(req)) {
		err = PTR_ERR(req);
		goto out;
	}
	req->r_inode = inode;
	ihold(inode);
	req->r_num_caps = 1;
	if (flags & (O_CREAT|O_TRUNC))
		parent_inode = ceph_get_dentry_parent_inode(file->f_dentry);
	err = ceph_mdsc_do_request(mdsc, parent_inode, req);
	iput(parent_inode);
	if (!err)
		err = ceph_init_file(inode, file, req->r_fmode);
	ceph_mdsc_put_request(req);
	dout("open result=%d on %llx.%llx\n", err, ceph_vinop(inode));
out:
	return err;
}
Example #7
0
/*
 * Do a lookup + open with a single request.  If we get a non-existent
 * file or symlink, return 1 so the VFS can retry.
 */
int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
		     struct file *file, unsigned flags, umode_t mode,
		     int *opened)
{
	struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
	struct ceph_mds_client *mdsc = fsc->mdsc;
	struct ceph_mds_request *req;
	struct dentry *dn;
	struct ceph_acls_info acls = {};
       int mask;
	int err;

	dout("atomic_open %p dentry %p '%pd' %s flags %d mode 0%o\n",
	     dir, dentry, dentry,
	     d_unhashed(dentry) ? "unhashed" : "hashed", flags, mode);

	if (dentry->d_name.len > NAME_MAX)
		return -ENAMETOOLONG;

	err = ceph_init_dentry(dentry);
	if (err < 0)
		return err;

	if (flags & O_CREAT) {
		err = ceph_pre_init_acls(dir, &mode, &acls);
		if (err < 0)
			return err;
	}

	/* do the open */
	req = prepare_open_request(dir->i_sb, flags, mode);
	if (IS_ERR(req)) {
		err = PTR_ERR(req);
		goto out_acl;
	}
	req->r_dentry = dget(dentry);
	req->r_num_caps = 2;
	if (flags & O_CREAT) {
		req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
		req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
		if (acls.pagelist) {
			req->r_pagelist = acls.pagelist;
			acls.pagelist = NULL;
		}
	}

       mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED;
       if (ceph_security_xattr_wanted(dir))
               mask |= CEPH_CAP_XATTR_SHARED;
       req->r_args.open.mask = cpu_to_le32(mask);

	req->r_locked_dir = dir;           /* caller holds dir->i_mutex */
	err = ceph_mdsc_do_request(mdsc,
				   (flags & (O_CREAT|O_TRUNC)) ? dir : NULL,
				   req);
	err = ceph_handle_snapdir(req, dentry, err);
	if (err)
		goto out_req;

	if ((flags & O_CREAT) && !req->r_reply_info.head->is_dentry)
		err = ceph_handle_notrace_create(dir, dentry);

	if (d_in_lookup(dentry)) {
		dn = ceph_finish_lookup(req, dentry, err);
		if (IS_ERR(dn))
			err = PTR_ERR(dn);
	} else {
		/* we were given a hashed negative dentry */
		dn = NULL;
	}
	if (err)
		goto out_req;
	if (dn || d_really_is_negative(dentry) || d_is_symlink(dentry)) {
		/* make vfs retry on splice, ENOENT, or symlink */
		dout("atomic_open finish_no_open on dn %p\n", dn);
		err = finish_no_open(file, dn);
	} else {
		dout("atomic_open finish_open on dn %p\n", dn);
		if (req->r_op == CEPH_MDS_OP_CREATE && req->r_reply_info.has_create_ino) {
			ceph_init_inode_acls(d_inode(dentry), &acls);
			*opened |= FILE_CREATED;
		}
		err = finish_open(file, dentry, ceph_open, opened);
	}
out_req:
	if (!req->r_err && req->r_target_inode)
		ceph_put_fmode(ceph_inode(req->r_target_inode), req->r_fmode);
	ceph_mdsc_put_request(req);
out_acl:
	ceph_release_acls_info(&acls);
	dout("atomic_open result=%d\n", err);
	return err;
}