C++ (Cpp) __zpl_xattr_get Examples

Example #1

File: zpl_xattr.c Project: ClusterHQ/zfs

static int
zpl_xattr_set(struct inode *ip, const char *name, const void *value,
    size_t size, int flags)
{
	znode_t *zp = ITOZ(ip);
	zfs_sb_t *zsb = ZTOZSB(zp);
	cred_t *cr = CRED();
	fstrans_cookie_t cookie;
	int error;

	crhold(cr);
	cookie = spl_fstrans_mark();
	rrm_enter_read(&(zsb)->z_teardown_lock, FTAG);
	rw_enter(&ITOZ(ip)->z_xattr_lock, RW_WRITER);

	/*
	 * Before setting the xattr check to see if it already exists.
	 * This is done to ensure the following optional flags are honored.
	 *
	 *   XATTR_CREATE: fail if xattr already exists
	 *   XATTR_REPLACE: fail if xattr does not exist
	 */
	error = __zpl_xattr_get(ip, name, NULL, 0, cr);
	if (error < 0) {
		if (error != -ENODATA)
			goto out;

		if (flags & XATTR_REPLACE)
			goto out;

		/* The xattr to be removed already doesn't exist */
		error = 0;
		if (value == NULL)
			goto out;
	} else {
		error = -EEXIST;
		if (flags & XATTR_CREATE)
			goto out;
	}

	/* Preferentially store the xattr as a SA for better performance */
	if (zsb->z_use_sa && zsb->z_xattr_sa && zp->z_is_sa) {
		error = zpl_xattr_set_sa(ip, name, value, size, flags, cr);
		if (error == 0)
			goto out;
	}

	error = zpl_xattr_set_dir(ip, name, value, size, flags, cr);
out:
	rw_exit(&ITOZ(ip)->z_xattr_lock);
	rrm_exit(&(zsb)->z_teardown_lock, FTAG);
	spl_fstrans_unmark(cookie);
	crfree(cr);
	ASSERT3S(error, <=, 0);

	return (error);
}

Example #2

File: zpl_xattr.c Project: mschirmacher/zfs

static int
zpl_xattr_get(struct inode *ip, const char *name, void *value, size_t size)
{
	znode_t *zp = ITOZ(ip);
	cred_t *cr = CRED();
	int error;

	crhold(cr);
	rw_enter(&zp->z_xattr_lock, RW_READER);
	error = __zpl_xattr_get(ip, name, value, size, cr);
	rw_exit(&zp->z_xattr_lock);
	crfree(cr);

	return (error);
}

Example #3

File: zpl_xattr.c Project: ClusterHQ/zfs

static int
zpl_xattr_get(struct inode *ip, const char *name, void *value, size_t size)
{
	znode_t *zp = ITOZ(ip);
	zfs_sb_t *zsb = ZTOZSB(zp);
	cred_t *cr = CRED();
	fstrans_cookie_t cookie;
	int error;

	crhold(cr);
	cookie = spl_fstrans_mark();
	rrm_enter_read(&(zsb)->z_teardown_lock, FTAG);
	rw_enter(&zp->z_xattr_lock, RW_READER);
	error = __zpl_xattr_get(ip, name, value, size, cr);
	rw_exit(&zp->z_xattr_lock);
	rrm_exit(&(zsb)->z_teardown_lock, FTAG);
	spl_fstrans_unmark(cookie);
	crfree(cr);

	return (error);
}